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 8640390131bSFrank Mayhar if (sbi->s_journal) { 865ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 86647b4a50bSJan Kara sbi->s_journal = NULL; 867ef2cabf7SHidehiro Kawai if (err < 0) 868c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 8690390131bSFrank Mayhar } 870d4edac31SJosef Bacik 871a1c6c569SSergey Senozhatsky del_timer(&sbi->s_err_report); 872d4edac31SJosef Bacik ext4_release_system_zone(sb); 873d4edac31SJosef Bacik ext4_mb_release(sb); 874d4edac31SJosef Bacik ext4_ext_release(sb); 875d4edac31SJosef Bacik ext4_xattr_put_super(sb); 876d4edac31SJosef Bacik 877ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 878617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 879ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 880ac27a0ecSDave Kleikamp } 88158c5873aSArtem Bityutskiy if (!(sb->s_flags & MS_RDONLY)) 882a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 883a8e25a83SArtem Bityutskiy 884240799cdSTheodore Ts'o if (sbi->s_proc) { 88566acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 8869f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 887240799cdSTheodore Ts'o } 8883197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 889ac27a0ecSDave Kleikamp 890ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 891ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 892f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 8939933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 89457042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 895ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 896ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 89757042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 898ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 899ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 900ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 901ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 902ac27a0ecSDave Kleikamp #endif 903ac27a0ecSDave Kleikamp 904ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 905ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 906ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 907ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 908ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 909ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 910ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 911ac27a0ecSDave Kleikamp 912f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 913ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 914ac27a0ecSDave Kleikamp /* 915ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 916ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 917ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 918ac27a0ecSDave Kleikamp */ 919ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 920f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 921617ba13bSMingming Cao ext4_blkdev_remove(sbi); 922ac27a0ecSDave Kleikamp } 923c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 924c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 925ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 9263197ebdbSTheodore Ts'o /* 9273197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 9283197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 9293197ebdbSTheodore Ts'o */ 9303197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 9313197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 9320441984aSDarrick J. Wong if (sbi->s_chksum_driver) 9330441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 934705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 935ac27a0ecSDave Kleikamp kfree(sbi); 936ac27a0ecSDave Kleikamp } 937ac27a0ecSDave Kleikamp 938e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 939ac27a0ecSDave Kleikamp 940ac27a0ecSDave Kleikamp /* 941ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 942ac27a0ecSDave Kleikamp */ 943617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 944ac27a0ecSDave Kleikamp { 945617ba13bSMingming Cao struct ext4_inode_info *ei; 946ac27a0ecSDave Kleikamp 947e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 948ac27a0ecSDave Kleikamp if (!ei) 949ac27a0ecSDave Kleikamp return NULL; 9500b8e58a1SAndreas Dilger 951ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 95291246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 953a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 954c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 955c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 956d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 957d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 958d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 9599d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 9607e731bc9STheodore Ts'o ei->i_da_metadata_calc_last_lblock = 0; 961d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 962a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 963a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 964a9e7f447SDmitry Monakhov #endif 9658aefcd55STheodore Ts'o ei->jinode = NULL; 966c7064ef1SJiaying Zhang INIT_LIST_HEAD(&ei->i_completed_io_list); 967744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 9688d5d02e6SMingming Cao ei->cur_aio_dio = NULL; 969b436b9beSJan Kara ei->i_sync_tid = 0; 970b436b9beSJan Kara ei->i_datasync_tid = 0; 971f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 972e9e3bcecSEric Sandeen atomic_set(&ei->i_aiodio_unwritten, 0); 9730b8e58a1SAndreas Dilger 974ac27a0ecSDave Kleikamp return &ei->vfs_inode; 975ac27a0ecSDave Kleikamp } 976ac27a0ecSDave Kleikamp 9777ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 9787ff9c073STheodore Ts'o { 9797ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 9807ff9c073STheodore Ts'o 9817ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 9827ff9c073STheodore Ts'o return drop; 9837ff9c073STheodore Ts'o } 9847ff9c073STheodore Ts'o 985fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 986fa0d7e3dSNick Piggin { 987fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 988fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 989fa0d7e3dSNick Piggin } 990fa0d7e3dSNick Piggin 991617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 992ac27a0ecSDave Kleikamp { 9939f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 994b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 995b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 996b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 9979f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 9989f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 9999f7dd93dSVasily Averin true); 10009f7dd93dSVasily Averin dump_stack(); 10019f7dd93dSVasily Averin } 1002fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 1003ac27a0ecSDave Kleikamp } 1004ac27a0ecSDave Kleikamp 100551cc5068SAlexey Dobriyan static void init_once(void *foo) 1006ac27a0ecSDave Kleikamp { 1007617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 1008ac27a0ecSDave Kleikamp 1009ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 101003010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1011ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 1012ac27a0ecSDave Kleikamp #endif 10130e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1014ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1015ac27a0ecSDave Kleikamp } 1016ac27a0ecSDave Kleikamp 1017ac27a0ecSDave Kleikamp static int init_inodecache(void) 1018ac27a0ecSDave Kleikamp { 1019617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 1020617ba13bSMingming Cao sizeof(struct ext4_inode_info), 1021ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 1022ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 102320c2df83SPaul Mundt init_once); 1024617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1025ac27a0ecSDave Kleikamp return -ENOMEM; 1026ac27a0ecSDave Kleikamp return 0; 1027ac27a0ecSDave Kleikamp } 1028ac27a0ecSDave Kleikamp 1029ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1030ac27a0ecSDave Kleikamp { 1031617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1032ac27a0ecSDave Kleikamp } 1033ac27a0ecSDave Kleikamp 10340930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1035ac27a0ecSDave Kleikamp { 10360930fcc1SAl Viro invalidate_inode_buffers(inode); 1037dbd5768fSJan Kara clear_inode(inode); 10389f754758SChristoph Hellwig dquot_drop(inode); 1039c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 10408aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 10418aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 10428aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 10438aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 10448aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 10458aefcd55STheodore Ts'o } 1046ac27a0ecSDave Kleikamp } 1047ac27a0ecSDave Kleikamp 10481b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 10491b961ac0SChristoph Hellwig u64 ino, u32 generation) 1050ac27a0ecSDave Kleikamp { 1051ac27a0ecSDave Kleikamp struct inode *inode; 1052ac27a0ecSDave Kleikamp 1053617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1054ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1055617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1056ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1057ac27a0ecSDave Kleikamp 1058ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1059ac27a0ecSDave Kleikamp * 1060617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1061ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1062ac27a0ecSDave Kleikamp * 1063ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1064ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1065ac27a0ecSDave Kleikamp */ 10661d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 10671d1fe1eeSDavid Howells if (IS_ERR(inode)) 10681d1fe1eeSDavid Howells return ERR_CAST(inode); 10691d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1070ac27a0ecSDave Kleikamp iput(inode); 1071ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1072ac27a0ecSDave Kleikamp } 10731b961ac0SChristoph Hellwig 10741b961ac0SChristoph Hellwig return inode; 1075ac27a0ecSDave Kleikamp } 10761b961ac0SChristoph Hellwig 10771b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 10781b961ac0SChristoph Hellwig int fh_len, int fh_type) 10791b961ac0SChristoph Hellwig { 10801b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 10811b961ac0SChristoph Hellwig ext4_nfs_get_inode); 10821b961ac0SChristoph Hellwig } 10831b961ac0SChristoph Hellwig 10841b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 10851b961ac0SChristoph Hellwig int fh_len, int fh_type) 10861b961ac0SChristoph Hellwig { 10871b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 10881b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1089ac27a0ecSDave Kleikamp } 1090ac27a0ecSDave Kleikamp 1091c39a7f84SToshiyuki Okajima /* 1092c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1093c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1094c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1095c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1096c39a7f84SToshiyuki Okajima */ 10970b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 10980b8e58a1SAndreas Dilger gfp_t wait) 1099c39a7f84SToshiyuki Okajima { 1100c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1101c39a7f84SToshiyuki Okajima 1102c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1103c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1104c39a7f84SToshiyuki Okajima return 0; 1105c39a7f84SToshiyuki Okajima if (journal) 1106c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1107c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1108c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1109c39a7f84SToshiyuki Okajima } 1110c39a7f84SToshiyuki Okajima 1111ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1112ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1113ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1114ac27a0ecSDave Kleikamp 1115617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1116617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1117617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1118617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1119617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 11206f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1121f00c9e44SJan Kara struct path *path); 11227c319d32SAditya Kali static int ext4_quota_on_sysfile(struct super_block *sb, int type, 11237c319d32SAditya Kali int format_id); 1124ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 11257c319d32SAditya Kali static int ext4_quota_off_sysfile(struct super_block *sb, int type); 1126617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1127617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1128ac27a0ecSDave Kleikamp size_t len, loff_t off); 1129617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1130ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 11317c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 11327c319d32SAditya Kali unsigned int flags); 11337c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 1134ac27a0ecSDave Kleikamp 113561e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 113660e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1137617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1138617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1139617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1140617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1141a5b5ee32SJan Kara .write_info = ext4_write_info, 1142a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1143a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1144ac27a0ecSDave Kleikamp }; 1145ac27a0ecSDave Kleikamp 11460d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1147617ba13bSMingming Cao .quota_on = ext4_quota_on, 1148ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1149287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1150287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1151287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1152287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1153287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1154ac27a0ecSDave Kleikamp }; 11557c319d32SAditya Kali 11567c319d32SAditya Kali static const struct quotactl_ops ext4_qctl_sysfile_operations = { 11577c319d32SAditya Kali .quota_on_meta = ext4_quota_on_sysfile, 11587c319d32SAditya Kali .quota_off = ext4_quota_off_sysfile, 11597c319d32SAditya Kali .quota_sync = dquot_quota_sync, 11607c319d32SAditya Kali .get_info = dquot_get_dqinfo, 11617c319d32SAditya Kali .set_info = dquot_set_dqinfo, 11627c319d32SAditya Kali .get_dqblk = dquot_get_dqblk, 11637c319d32SAditya Kali .set_dqblk = dquot_set_dqblk 11647c319d32SAditya Kali }; 1165ac27a0ecSDave Kleikamp #endif 1166ac27a0ecSDave Kleikamp 1167ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1168617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1169617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1170617ba13bSMingming Cao .write_inode = ext4_write_inode, 1171617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 11727ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 11730930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1174617ba13bSMingming Cao .put_super = ext4_put_super, 1175617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1176c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1177c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1178617ba13bSMingming Cao .statfs = ext4_statfs, 1179617ba13bSMingming Cao .remount_fs = ext4_remount, 1180617ba13bSMingming Cao .show_options = ext4_show_options, 1181ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1182617ba13bSMingming Cao .quota_read = ext4_quota_read, 1183617ba13bSMingming Cao .quota_write = ext4_quota_write, 1184ac27a0ecSDave Kleikamp #endif 1185c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1186ac27a0ecSDave Kleikamp }; 1187ac27a0ecSDave Kleikamp 11889ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 11899ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 11909ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 11919ca92389STheodore Ts'o .write_inode = ext4_write_inode, 11929ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 11937ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 11940930fcc1SAl Viro .evict_inode = ext4_evict_inode, 11959ca92389STheodore Ts'o .put_super = ext4_put_super, 11969ca92389STheodore Ts'o .statfs = ext4_statfs, 11979ca92389STheodore Ts'o .remount_fs = ext4_remount, 11989ca92389STheodore Ts'o .show_options = ext4_show_options, 11999ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 12009ca92389STheodore Ts'o .quota_read = ext4_quota_read, 12019ca92389STheodore Ts'o .quota_write = ext4_quota_write, 12029ca92389STheodore Ts'o #endif 12039ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 12049ca92389STheodore Ts'o }; 12059ca92389STheodore Ts'o 120639655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 12071b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 12081b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1209617ba13bSMingming Cao .get_parent = ext4_get_parent, 1210ac27a0ecSDave Kleikamp }; 1211ac27a0ecSDave Kleikamp 1212ac27a0ecSDave Kleikamp enum { 1213ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1214ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 121572578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1216ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 121772578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 121830773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 121943e625d8SEric Sandeen Opt_journal_dev, Opt_journal_checksum, Opt_journal_async_commit, 1220ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1221296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1222ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 12235a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1224ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 1225661aa520SEric Sandeen Opt_usrquota, Opt_grpquota, Opt_i_version, 12261449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 12271449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 12285328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1229744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1230fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1231df981d03STheodore Ts'o Opt_max_dir_size_kb, 1232ac27a0ecSDave Kleikamp }; 1233ac27a0ecSDave Kleikamp 1234a447c093SSteven Whitehouse static const match_table_t tokens = { 1235ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1236ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1237ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1238ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1239ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1240ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1241ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1242ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1243ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1244ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1245ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1246ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1247ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1248ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 124972578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 125072578c33STheodore Ts'o {Opt_removed, "orlov"}, 1251ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1252ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1253ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1254ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1255e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 12565a916be1STheodore Ts'o {Opt_noload, "noload"}, 125772578c33STheodore Ts'o {Opt_removed, "nobh"}, 125872578c33STheodore Ts'o {Opt_removed, "bh"}, 1259ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 126030773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 126130773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1262ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1263818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1264818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1265ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1266ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1267ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1268ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 12695bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 12705bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1271ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1272ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1273ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1274ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1275ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1276ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 12775a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1278ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1279ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1280ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1281ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1282ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 128306705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 128406705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 128525ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1286c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 128764769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1288dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 12891449032bSTheodore Ts'o {Opt_mblk_io_submit, "mblk_io_submit"}, 12901449032bSTheodore Ts'o {Opt_nomblk_io_submit, "nomblk_io_submit"}, 12916fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 12926fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1293240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1294b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1295afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 129606705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 129706705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1298744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1299744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 13005328e635SEric Sandeen {Opt_discard, "discard"}, 13015328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1302fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1303fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1304fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1305df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 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}, 1486df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 148726092bf5STheodore Ts'o {Opt_err, 0, 0} 148826092bf5STheodore Ts'o }; 148926092bf5STheodore Ts'o 149026092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 149126092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 149226092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 149326092bf5STheodore Ts'o { 149426092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 149526092bf5STheodore Ts'o const struct mount_opts *m; 149608cefc7aSEric W. Biederman kuid_t uid; 149708cefc7aSEric W. Biederman kgid_t gid; 149826092bf5STheodore Ts'o int arg = 0; 149926092bf5STheodore Ts'o 150057f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 150157f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 150257f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 150357f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 150457f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 150557f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 150657f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 150757f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 150857f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 150957f73c2cSTheodore Ts'o #endif 151026092bf5STheodore Ts'o if (args->from && match_int(args, &arg)) 151126092bf5STheodore Ts'o return -1; 151226092bf5STheodore Ts'o switch (token) { 1513f7048605STheodore Ts'o case Opt_noacl: 1514f7048605STheodore Ts'o case Opt_nouser_xattr: 1515f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1516f7048605STheodore Ts'o break; 151726092bf5STheodore Ts'o case Opt_sb: 151826092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 151926092bf5STheodore Ts'o case Opt_removed: 152026092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 152126092bf5STheodore Ts'o "Ignoring removed %s option", opt); 152226092bf5STheodore Ts'o return 1; 152326092bf5STheodore Ts'o case Opt_resuid: 152408cefc7aSEric W. Biederman uid = make_kuid(current_user_ns(), arg); 152508cefc7aSEric W. Biederman if (!uid_valid(uid)) { 152608cefc7aSEric W. Biederman ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 152708cefc7aSEric W. Biederman return -1; 152808cefc7aSEric W. Biederman } 152908cefc7aSEric W. Biederman sbi->s_resuid = uid; 153026092bf5STheodore Ts'o return 1; 153126092bf5STheodore Ts'o case Opt_resgid: 153208cefc7aSEric W. Biederman gid = make_kgid(current_user_ns(), arg); 153308cefc7aSEric W. Biederman if (!gid_valid(gid)) { 153408cefc7aSEric W. Biederman ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 153508cefc7aSEric W. Biederman return -1; 153608cefc7aSEric W. Biederman } 153708cefc7aSEric W. Biederman sbi->s_resgid = gid; 153826092bf5STheodore Ts'o return 1; 153926092bf5STheodore Ts'o case Opt_abort: 154026092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 154126092bf5STheodore Ts'o return 1; 154226092bf5STheodore Ts'o case Opt_i_version: 154326092bf5STheodore Ts'o sb->s_flags |= MS_I_VERSION; 154426092bf5STheodore Ts'o return 1; 154526092bf5STheodore Ts'o case Opt_journal_dev: 154626092bf5STheodore Ts'o if (is_remount) { 154726092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 154826092bf5STheodore Ts'o "Cannot specify journal on remount"); 154926092bf5STheodore Ts'o return -1; 155026092bf5STheodore Ts'o } 155126092bf5STheodore Ts'o *journal_devnum = arg; 155226092bf5STheodore Ts'o return 1; 155326092bf5STheodore Ts'o case Opt_journal_ioprio: 155426092bf5STheodore Ts'o if (arg < 0 || arg > 7) 155526092bf5STheodore Ts'o return -1; 155626092bf5STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 155726092bf5STheodore Ts'o return 1; 155826092bf5STheodore Ts'o } 155926092bf5STheodore Ts'o 156026092bf5STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 156126092bf5STheodore Ts'o if (token != m->token) 156226092bf5STheodore Ts'o continue; 156326092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 156426092bf5STheodore Ts'o return -1; 156526092bf5STheodore Ts'o if (m->flags & MOPT_EXPLICIT) 156626092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 156726092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 156826092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 156926092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 157026092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 157126092bf5STheodore Ts'o "options when quota turned on"); 157226092bf5STheodore Ts'o return -1; 157326092bf5STheodore Ts'o } 157426092bf5STheodore Ts'o 157526092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 157626092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 157726092bf5STheodore Ts'o } else if (token == Opt_commit) { 157826092bf5STheodore Ts'o if (arg == 0) 157926092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 158026092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 158126092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 158226092bf5STheodore Ts'o if (arg == 0) 158326092bf5STheodore Ts'o arg = EXT4_DEF_MAX_BATCH_TIME; 158426092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 158526092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 158626092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 158726092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 158826092bf5STheodore Ts'o if (arg > (1 << 30)) 158926092bf5STheodore Ts'o return -1; 159026092bf5STheodore Ts'o if (arg && !is_power_of_2(arg)) { 159126092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 159226092bf5STheodore Ts'o "EXT4-fs: inode_readahead_blks" 159326092bf5STheodore Ts'o " must be a power of 2"); 159426092bf5STheodore Ts'o return -1; 159526092bf5STheodore Ts'o } 159626092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 159726092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 159826092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 159926092bf5STheodore Ts'o if (!args->from) 160026092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 160126092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1602df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1603df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 160426092bf5STheodore Ts'o } else if (token == Opt_stripe) { 160526092bf5STheodore Ts'o sbi->s_stripe = arg; 160626092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 160726092bf5STheodore Ts'o if (is_remount) { 160826092bf5STheodore Ts'o if (!sbi->s_journal) 160926092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 161026092bf5STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) != 161126092bf5STheodore Ts'o m->mount_opt) { 161226092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 161326092bf5STheodore Ts'o "Cannot change data mode on remount"); 161426092bf5STheodore Ts'o return -1; 161526092bf5STheodore Ts'o } 161626092bf5STheodore Ts'o } else { 161726092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 161826092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 161926092bf5STheodore Ts'o } 162026092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 162126092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 162226092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 162326092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 162426092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot " 162526092bf5STheodore Ts'o "change journaled quota options " 162626092bf5STheodore Ts'o "when quota turned on"); 162726092bf5STheodore Ts'o return -1; 162826092bf5STheodore Ts'o } 162926092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 163026092bf5STheodore Ts'o #endif 163126092bf5STheodore Ts'o } else { 163226092bf5STheodore Ts'o if (!args->from) 163326092bf5STheodore Ts'o arg = 1; 163426092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 163526092bf5STheodore Ts'o arg = !arg; 163626092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 163726092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 163826092bf5STheodore Ts'o "buggy handling of option %s", opt); 163926092bf5STheodore Ts'o WARN_ON(1); 164026092bf5STheodore Ts'o return -1; 164126092bf5STheodore Ts'o } 164226092bf5STheodore Ts'o if (arg != 0) 164326092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 164426092bf5STheodore Ts'o else 164526092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 164626092bf5STheodore Ts'o } 164726092bf5STheodore Ts'o return 1; 164826092bf5STheodore Ts'o } 164926092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 165026092bf5STheodore Ts'o "or missing value", opt); 165126092bf5STheodore Ts'o return -1; 165226092bf5STheodore Ts'o } 165326092bf5STheodore Ts'o 1654ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1655c3191067STheodore Ts'o unsigned long *journal_devnum, 1656b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1657661aa520SEric Sandeen int is_remount) 1658ac27a0ecSDave Kleikamp { 1659db7e5c66SEldad Zack #ifdef CONFIG_QUOTA 1660617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1661db7e5c66SEldad Zack #endif 1662ac27a0ecSDave Kleikamp char *p; 1663ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 166426092bf5STheodore Ts'o int token; 1665ac27a0ecSDave Kleikamp 1666ac27a0ecSDave Kleikamp if (!options) 1667ac27a0ecSDave Kleikamp return 1; 1668ac27a0ecSDave Kleikamp 1669ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1670ac27a0ecSDave Kleikamp if (!*p) 1671ac27a0ecSDave Kleikamp continue; 167215121c18SEric Sandeen /* 167315121c18SEric Sandeen * Initialize args struct so we know whether arg was 167415121c18SEric Sandeen * found; some options take optional arguments. 167515121c18SEric Sandeen */ 167626092bf5STheodore Ts'o args[0].to = args[0].from = 0; 1677ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 167826092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 167926092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1680ac27a0ecSDave Kleikamp return 0; 1681ac27a0ecSDave Kleikamp } 1682ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1683ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1684482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1685fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1686ac27a0ecSDave Kleikamp 1687482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1688fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1689ac27a0ecSDave Kleikamp 169056c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1691b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1692b31e1552SEric Sandeen "format mixing"); 1693ac27a0ecSDave Kleikamp return 0; 1694ac27a0ecSDave Kleikamp } 1695ac27a0ecSDave Kleikamp 1696ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1697b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1698b31e1552SEric Sandeen "not specified"); 1699ac27a0ecSDave Kleikamp return 0; 1700ac27a0ecSDave Kleikamp } 1701ac27a0ecSDave Kleikamp } else { 1702ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1703b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 17042c8be6b2SJan Kara "specified with no journaling " 1705b31e1552SEric Sandeen "enabled"); 1706ac27a0ecSDave Kleikamp return 0; 1707ac27a0ecSDave Kleikamp } 1708ac27a0ecSDave Kleikamp } 1709ac27a0ecSDave Kleikamp #endif 1710ac27a0ecSDave Kleikamp return 1; 1711ac27a0ecSDave Kleikamp } 1712ac27a0ecSDave Kleikamp 17132adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 17142adf6da8STheodore Ts'o struct super_block *sb) 17152adf6da8STheodore Ts'o { 17162adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 17172adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17182adf6da8STheodore Ts'o 17192adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 17202adf6da8STheodore Ts'o char *fmtname = ""; 17212adf6da8STheodore Ts'o 17222adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 17232adf6da8STheodore Ts'o case QFMT_VFS_OLD: 17242adf6da8STheodore Ts'o fmtname = "vfsold"; 17252adf6da8STheodore Ts'o break; 17262adf6da8STheodore Ts'o case QFMT_VFS_V0: 17272adf6da8STheodore Ts'o fmtname = "vfsv0"; 17282adf6da8STheodore Ts'o break; 17292adf6da8STheodore Ts'o case QFMT_VFS_V1: 17302adf6da8STheodore Ts'o fmtname = "vfsv1"; 17312adf6da8STheodore Ts'o break; 17322adf6da8STheodore Ts'o } 17332adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 17342adf6da8STheodore Ts'o } 17352adf6da8STheodore Ts'o 17362adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 17372adf6da8STheodore Ts'o seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 17382adf6da8STheodore Ts'o 17392adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 17402adf6da8STheodore Ts'o seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 17412adf6da8STheodore Ts'o 17422adf6da8STheodore Ts'o if (test_opt(sb, USRQUOTA)) 17432adf6da8STheodore Ts'o seq_puts(seq, ",usrquota"); 17442adf6da8STheodore Ts'o 17452adf6da8STheodore Ts'o if (test_opt(sb, GRPQUOTA)) 17462adf6da8STheodore Ts'o seq_puts(seq, ",grpquota"); 17472adf6da8STheodore Ts'o #endif 17482adf6da8STheodore Ts'o } 17492adf6da8STheodore Ts'o 17505a916be1STheodore Ts'o static const char *token2str(int token) 17515a916be1STheodore Ts'o { 17525a916be1STheodore Ts'o static const struct match_token *t; 17535a916be1STheodore Ts'o 17545a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 17555a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 17565a916be1STheodore Ts'o break; 17575a916be1STheodore Ts'o return t->pattern; 17585a916be1STheodore Ts'o } 17595a916be1STheodore Ts'o 17602adf6da8STheodore Ts'o /* 17612adf6da8STheodore Ts'o * Show an option if 17622adf6da8STheodore Ts'o * - it's set to a non-default value OR 17632adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 17642adf6da8STheodore Ts'o */ 176566acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 176666acdcf4STheodore Ts'o int nodefs) 17672adf6da8STheodore Ts'o { 17682adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17692adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 177066acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 17715a916be1STheodore Ts'o const struct mount_opts *m; 177266acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 17732adf6da8STheodore Ts'o 177466acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 177566acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 17762adf6da8STheodore Ts'o 17772adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 17785a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 17795a916be1STheodore Ts'o 17805a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 17815a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 17825a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 17835a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 17845a916be1STheodore Ts'o continue; 178566acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 17865a916be1STheodore Ts'o continue; /* skip if same as the default */ 17875a916be1STheodore Ts'o if ((want_set && 17885a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 17895a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 17905a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 17915a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 17925a916be1STheodore Ts'o } 17935a916be1STheodore Ts'o 179408cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 17955a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 179608cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 179708cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 179808cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 17995a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 180008cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 180108cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 180266acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 18035a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 18045a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 18052adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 18065a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 18072adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 18085a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 180966acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 18105a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 181166acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 18125a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 181366acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 18145a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 18152adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 18165a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 181766acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 18185a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 181966acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 18202adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 18215a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 18222adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 18235a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 18242adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 18255a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 18265a916be1STheodore Ts'o } 182766acdcf4STheodore Ts'o if (nodefs || 182866acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 18295a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 18302adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 18312adf6da8STheodore Ts'o 183266acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 183366acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 18345a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 1835df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 1836df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 18372adf6da8STheodore Ts'o 18382adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 18392adf6da8STheodore Ts'o return 0; 18402adf6da8STheodore Ts'o } 18412adf6da8STheodore Ts'o 184266acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 184366acdcf4STheodore Ts'o { 184466acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 184566acdcf4STheodore Ts'o } 184666acdcf4STheodore Ts'o 184766acdcf4STheodore Ts'o static int options_seq_show(struct seq_file *seq, void *offset) 184866acdcf4STheodore Ts'o { 184966acdcf4STheodore Ts'o struct super_block *sb = seq->private; 185066acdcf4STheodore Ts'o int rc; 185166acdcf4STheodore Ts'o 185266acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 185366acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 185466acdcf4STheodore Ts'o seq_puts(seq, "\n"); 185566acdcf4STheodore Ts'o return rc; 185666acdcf4STheodore Ts'o } 185766acdcf4STheodore Ts'o 185866acdcf4STheodore Ts'o static int options_open_fs(struct inode *inode, struct file *file) 185966acdcf4STheodore Ts'o { 186066acdcf4STheodore Ts'o return single_open(file, options_seq_show, PDE(inode)->data); 186166acdcf4STheodore Ts'o } 186266acdcf4STheodore Ts'o 186366acdcf4STheodore Ts'o static const struct file_operations ext4_seq_options_fops = { 186466acdcf4STheodore Ts'o .owner = THIS_MODULE, 186566acdcf4STheodore Ts'o .open = options_open_fs, 186666acdcf4STheodore Ts'o .read = seq_read, 186766acdcf4STheodore Ts'o .llseek = seq_lseek, 186866acdcf4STheodore Ts'o .release = single_release, 186966acdcf4STheodore Ts'o }; 187066acdcf4STheodore Ts'o 1871617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1872ac27a0ecSDave Kleikamp int read_only) 1873ac27a0ecSDave Kleikamp { 1874617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1875ac27a0ecSDave Kleikamp int res = 0; 1876ac27a0ecSDave Kleikamp 1877617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1878b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1879b31e1552SEric Sandeen "forcing read-only mode"); 1880ac27a0ecSDave Kleikamp res = MS_RDONLY; 1881ac27a0ecSDave Kleikamp } 1882ac27a0ecSDave Kleikamp if (read_only) 1883281b5995STheodore Ts'o goto done; 1884617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1885b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1886b31e1552SEric Sandeen "running e2fsck is recommended"); 1887617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1888b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1889b31e1552SEric Sandeen "warning: mounting fs with errors, " 1890b31e1552SEric Sandeen "running e2fsck is recommended"); 1891ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 1892ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1893ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1894b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1895b31e1552SEric Sandeen "warning: maximal mount count reached, " 1896b31e1552SEric Sandeen "running e2fsck is recommended"); 1897ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1898ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1899ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1900b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1901b31e1552SEric Sandeen "warning: checktime reached, " 1902b31e1552SEric Sandeen "running e2fsck is recommended"); 19030390131bSFrank Mayhar if (!sbi->s_journal) 1904216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1905ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1906617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1907e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1908ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1909617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 19100390131bSFrank Mayhar if (sbi->s_journal) 1911617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1912ac27a0ecSDave Kleikamp 1913e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1914281b5995STheodore Ts'o done: 1915ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1916a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1917a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1918ac27a0ecSDave Kleikamp sb->s_blocksize, 1919ac27a0ecSDave Kleikamp sbi->s_groups_count, 1920617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1921617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1922a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1923ac27a0ecSDave Kleikamp 19247abc52c2SDan Magenheimer cleancache_init_fs(sb); 1925ac27a0ecSDave Kleikamp return res; 1926ac27a0ecSDave Kleikamp } 1927ac27a0ecSDave Kleikamp 1928772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1929772cb7c8SJose R. Santos { 1930772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1931772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1932772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1933772cb7c8SJose R. Santos ext4_group_t flex_group; 1934d50f2ab6SXi Wang unsigned int groups_per_flex = 0; 1935c5ca7c76STheodore Ts'o size_t size; 1936772cb7c8SJose R. Santos int i; 1937772cb7c8SJose R. Santos 1938503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1939d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 1940772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1941772cb7c8SJose R. Santos return 1; 1942772cb7c8SJose R. Santos } 1943d50f2ab6SXi Wang groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1944772cb7c8SJose R. Santos 1945c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1946c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1947d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 1948d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 1949c5ca7c76STheodore Ts'o size = flex_group_count * sizeof(struct flex_groups); 19509933fc0aSTheodore Ts'o sbi->s_flex_groups = ext4_kvzalloc(size, GFP_KERNEL); 1951c5ca7c76STheodore Ts'o if (sbi->s_flex_groups == NULL) { 19529933fc0aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %u flex groups", 195394de56abSJoe Perches flex_group_count); 1954772cb7c8SJose R. Santos goto failed; 1955772cb7c8SJose R. Santos } 1956772cb7c8SJose R. Santos 1957772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 195888b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1959772cb7c8SJose R. Santos 1960772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 19617ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 19627ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 1963021b65bbSTheodore Ts'o atomic_add(ext4_free_group_clusters(sb, gdp), 196424aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 19657ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 19667ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1967772cb7c8SJose R. Santos } 1968772cb7c8SJose R. Santos 1969772cb7c8SJose R. Santos return 1; 1970772cb7c8SJose R. Santos failed: 1971772cb7c8SJose R. Santos return 0; 1972772cb7c8SJose R. Santos } 1973772cb7c8SJose R. Santos 1974feb0ab32SDarrick J. Wong static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1975717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1976717d50e4SAndreas Dilger { 1977feb0ab32SDarrick J. Wong int offset; 1978717d50e4SAndreas Dilger __u16 crc = 0; 1979717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1980717d50e4SAndreas Dilger 1981feb0ab32SDarrick J. Wong if ((sbi->s_es->s_feature_ro_compat & 1982feb0ab32SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))) { 1983feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 1984feb0ab32SDarrick J. Wong __u16 old_csum; 1985feb0ab32SDarrick J. Wong __u32 csum32; 1986feb0ab32SDarrick J. Wong 1987feb0ab32SDarrick J. Wong old_csum = gdp->bg_checksum; 1988feb0ab32SDarrick J. Wong gdp->bg_checksum = 0; 1989feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 1990feb0ab32SDarrick J. Wong sizeof(le_group)); 1991feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, 1992feb0ab32SDarrick J. Wong sbi->s_desc_size); 1993feb0ab32SDarrick J. Wong gdp->bg_checksum = old_csum; 1994feb0ab32SDarrick J. Wong 1995feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 1996feb0ab32SDarrick J. Wong goto out; 1997feb0ab32SDarrick J. Wong } 1998feb0ab32SDarrick J. Wong 1999feb0ab32SDarrick J. Wong /* old crc16 code */ 2000feb0ab32SDarrick J. Wong offset = offsetof(struct ext4_group_desc, bg_checksum); 2001feb0ab32SDarrick J. Wong 2002717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2003717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2004717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2005717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2006717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2007717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 2008717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 2009717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2010717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2011717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2012717d50e4SAndreas Dilger offset); 2013717d50e4SAndreas Dilger 2014feb0ab32SDarrick J. Wong out: 2015717d50e4SAndreas Dilger return cpu_to_le16(crc); 2016717d50e4SAndreas Dilger } 2017717d50e4SAndreas Dilger 2018feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2019717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2020717d50e4SAndreas Dilger { 2021feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2022feb0ab32SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(EXT4_SB(sb), 2023feb0ab32SDarrick J. Wong block_group, gdp))) 2024717d50e4SAndreas Dilger return 0; 2025717d50e4SAndreas Dilger 2026717d50e4SAndreas Dilger return 1; 2027717d50e4SAndreas Dilger } 2028717d50e4SAndreas Dilger 2029feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2030feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2031feb0ab32SDarrick J. Wong { 2032feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2033feb0ab32SDarrick J. Wong return; 2034feb0ab32SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(EXT4_SB(sb), block_group, gdp); 2035feb0ab32SDarrick J. Wong } 2036feb0ab32SDarrick J. Wong 2037ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2038bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2039bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2040ac27a0ecSDave Kleikamp { 2041617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2042617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2043617ba13bSMingming Cao ext4_fsblk_t last_block; 2044bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2045bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2046bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2047ce421581SJose R. Santos int flexbg_flag = 0; 2048bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2049ac27a0ecSDave Kleikamp 2050ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2051ce421581SJose R. Santos flexbg_flag = 1; 2052ce421581SJose R. Santos 2053617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2054ac27a0ecSDave Kleikamp 2055197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2056197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2057197cd65aSAkinobu Mita 2058ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2059bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2060ac27a0ecSDave Kleikamp else 2061ac27a0ecSDave Kleikamp last_block = first_block + 2062617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2063ac27a0ecSDave Kleikamp 2064bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2065bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2066bfff6873SLukas Czerner grp = i; 2067bfff6873SLukas Czerner 20688fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 20692b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2070b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2071a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2072b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2073ac27a0ecSDave Kleikamp return 0; 2074ac27a0ecSDave Kleikamp } 20758fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 20762b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2077b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2078a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2079b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2080ac27a0ecSDave Kleikamp return 0; 2081ac27a0ecSDave Kleikamp } 20828fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2083bd81d8eeSLaurent Vivier if (inode_table < first_block || 20842b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2085b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2086a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2087b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2088ac27a0ecSDave Kleikamp return 0; 2089ac27a0ecSDave Kleikamp } 2090955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2091feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2092b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2093b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2094fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2095fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 20967ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2097955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2098717d50e4SAndreas Dilger return 0; 2099717d50e4SAndreas Dilger } 21007ee1ec4cSLi Zefan } 2101955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2102ce421581SJose R. Santos if (!flexbg_flag) 2103617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2104ac27a0ecSDave Kleikamp } 2105bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2106bfff6873SLukas Czerner *first_not_zeroed = grp; 2107ac27a0ecSDave Kleikamp 21085dee5437STheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 21095dee5437STheodore Ts'o EXT4_C2B(sbi, ext4_count_free_clusters(sb))); 2110617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 2111ac27a0ecSDave Kleikamp return 1; 2112ac27a0ecSDave Kleikamp } 2113ac27a0ecSDave Kleikamp 2114617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2115ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2116ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2117ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2118ac27a0ecSDave Kleikamp * 2119ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2120ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2121ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2122ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2123ac27a0ecSDave Kleikamp * 2124ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2125ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2126ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2127617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2128ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2129ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2130ac27a0ecSDave Kleikamp */ 2131617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2132617ba13bSMingming Cao struct ext4_super_block *es) 2133ac27a0ecSDave Kleikamp { 2134ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2135ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2136ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2137ac27a0ecSDave Kleikamp int i; 2138ac27a0ecSDave Kleikamp #endif 2139ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2140ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2141ac27a0ecSDave Kleikamp return; 2142ac27a0ecSDave Kleikamp } 2143ac27a0ecSDave Kleikamp 2144a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2145b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2146b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2147a8f48a95SEric Sandeen return; 2148a8f48a95SEric Sandeen } 2149a8f48a95SEric Sandeen 2150d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2151d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2152d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2153d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2154d39195c3SAmir Goldstein return; 2155d39195c3SAmir Goldstein } 2156d39195c3SAmir Goldstein 2157617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2158ac27a0ecSDave Kleikamp if (es->s_last_orphan) 2159ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 2160ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2161ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2162ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2163ac27a0ecSDave Kleikamp return; 2164ac27a0ecSDave Kleikamp } 2165ac27a0ecSDave Kleikamp 2166ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2167b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2168ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2169ac27a0ecSDave Kleikamp } 2170ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2171ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2172ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2173ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2174ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2175617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2176617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2177ac27a0ecSDave Kleikamp if (ret < 0) 2178b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2179b31e1552SEric Sandeen "Cannot turn on journaled " 2180b31e1552SEric Sandeen "quota: error %d", ret); 2181ac27a0ecSDave Kleikamp } 2182ac27a0ecSDave Kleikamp } 2183ac27a0ecSDave Kleikamp #endif 2184ac27a0ecSDave Kleikamp 2185ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2186ac27a0ecSDave Kleikamp struct inode *inode; 2187ac27a0ecSDave Kleikamp 218897bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 218997bd42b9SJosef Bacik if (IS_ERR(inode)) { 2190ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2191ac27a0ecSDave Kleikamp break; 2192ac27a0ecSDave Kleikamp } 2193ac27a0ecSDave Kleikamp 2194617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2195871a2931SChristoph Hellwig dquot_initialize(inode); 2196ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2197b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2198b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 219946e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2200e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2201ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2202617ba13bSMingming Cao ext4_truncate(inode); 2203ac27a0ecSDave Kleikamp nr_truncates++; 2204ac27a0ecSDave Kleikamp } else { 2205b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2206b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 220746e665e9SHarvey Harrison __func__, inode->i_ino); 2208ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2209ac27a0ecSDave Kleikamp inode->i_ino); 2210ac27a0ecSDave Kleikamp nr_orphans++; 2211ac27a0ecSDave Kleikamp } 2212ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2213ac27a0ecSDave Kleikamp } 2214ac27a0ecSDave Kleikamp 2215ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2216ac27a0ecSDave Kleikamp 2217ac27a0ecSDave Kleikamp if (nr_orphans) 2218b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2219b31e1552SEric Sandeen PLURAL(nr_orphans)); 2220ac27a0ecSDave Kleikamp if (nr_truncates) 2221b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2222b31e1552SEric Sandeen PLURAL(nr_truncates)); 2223ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2224ac27a0ecSDave Kleikamp /* Turn quotas off */ 2225ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2226ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2227287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2228ac27a0ecSDave Kleikamp } 2229ac27a0ecSDave Kleikamp #endif 2230ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2231ac27a0ecSDave Kleikamp } 22320b8e58a1SAndreas Dilger 2233cd2291a4SEric Sandeen /* 2234cd2291a4SEric Sandeen * Maximal extent format file size. 2235cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2236cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2237cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2238cd2291a4SEric Sandeen * so that won't be a limiting factor. 2239cd2291a4SEric Sandeen * 2240f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2241f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2242f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2243f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2244f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2245f17722f9SLukas Czerner * 2246cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2247cd2291a4SEric Sandeen */ 2248f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2249cd2291a4SEric Sandeen { 2250cd2291a4SEric Sandeen loff_t res; 2251cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2252cd2291a4SEric Sandeen 2253cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2254f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2255cd2291a4SEric Sandeen /* 225690c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2257cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2258cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2259cd2291a4SEric Sandeen */ 2260cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2261cd2291a4SEric Sandeen 2262cd2291a4SEric Sandeen /* total blocks in file system block size */ 2263cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2264cd2291a4SEric Sandeen upper_limit <<= blkbits; 2265cd2291a4SEric Sandeen } 2266cd2291a4SEric Sandeen 2267f17722f9SLukas Czerner /* 2268f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2269f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2270f17722f9SLukas Czerner * size 2271f17722f9SLukas Czerner */ 2272f17722f9SLukas Czerner res = (1LL << 32) - 1; 2273cd2291a4SEric Sandeen res <<= blkbits; 2274cd2291a4SEric Sandeen 2275cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2276cd2291a4SEric Sandeen if (res > upper_limit) 2277cd2291a4SEric Sandeen res = upper_limit; 2278cd2291a4SEric Sandeen 2279cd2291a4SEric Sandeen return res; 2280cd2291a4SEric Sandeen } 2281ac27a0ecSDave Kleikamp 2282ac27a0ecSDave Kleikamp /* 2283cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 22840fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 22850fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2286ac27a0ecSDave Kleikamp */ 2287f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2288ac27a0ecSDave Kleikamp { 2289617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 22900fc1b451SAneesh Kumar K.V int meta_blocks; 22910fc1b451SAneesh Kumar K.V loff_t upper_limit; 22920b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 22930b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 22940b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 22950b8e58a1SAndreas Dilger * 22960b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 22970b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 22980fc1b451SAneesh Kumar K.V */ 22990fc1b451SAneesh Kumar K.V 2300f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 23010fc1b451SAneesh Kumar K.V /* 230290c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 23030b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 23040b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 23050fc1b451SAneesh Kumar K.V */ 23060fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 23070fc1b451SAneesh Kumar K.V 23080fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 23090fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 23100fc1b451SAneesh Kumar K.V 23110fc1b451SAneesh Kumar K.V } else { 23128180a562SAneesh Kumar K.V /* 23138180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 23148180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 23158180a562SAneesh Kumar K.V * represent total number of blocks in 23168180a562SAneesh Kumar K.V * file system block size 23178180a562SAneesh Kumar K.V */ 23180fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 23190fc1b451SAneesh Kumar K.V 23200fc1b451SAneesh Kumar K.V } 23210fc1b451SAneesh Kumar K.V 23220fc1b451SAneesh Kumar K.V /* indirect blocks */ 23230fc1b451SAneesh Kumar K.V meta_blocks = 1; 23240fc1b451SAneesh Kumar K.V /* double indirect blocks */ 23250fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 23260fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 23270fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 23280fc1b451SAneesh Kumar K.V 23290fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 23300fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2331ac27a0ecSDave Kleikamp 2332ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2333ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2334ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2335ac27a0ecSDave Kleikamp res <<= bits; 2336ac27a0ecSDave Kleikamp if (res > upper_limit) 2337ac27a0ecSDave Kleikamp res = upper_limit; 23380fc1b451SAneesh Kumar K.V 23390fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 23400fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 23410fc1b451SAneesh Kumar K.V 2342ac27a0ecSDave Kleikamp return res; 2343ac27a0ecSDave Kleikamp } 2344ac27a0ecSDave Kleikamp 2345617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 234670bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2347ac27a0ecSDave Kleikamp { 2348617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2349fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2350ac27a0ecSDave Kleikamp int has_super = 0; 2351ac27a0ecSDave Kleikamp 2352ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2353ac27a0ecSDave Kleikamp 2354617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2355ac27a0ecSDave Kleikamp nr < first_meta_bg) 235670bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2357ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2358617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2359ac27a0ecSDave Kleikamp has_super = 1; 23600b8e58a1SAndreas Dilger 2361617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2362ac27a0ecSDave Kleikamp } 2363ac27a0ecSDave Kleikamp 2364c9de560dSAlex Tomas /** 2365c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2366c9de560dSAlex Tomas * @sbi: In memory super block info 2367c9de560dSAlex Tomas * 2368c9de560dSAlex Tomas * If we have specified it via mount option, then 2369c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2370c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2371c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2372c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2373c9de560dSAlex Tomas * 2374c9de560dSAlex Tomas */ 2375c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2376c9de560dSAlex Tomas { 2377c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2378c9de560dSAlex Tomas unsigned long stripe_width = 2379c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 23803eb08658SDan Ehrenberg int ret; 2381c9de560dSAlex Tomas 2382c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 23833eb08658SDan Ehrenberg ret = sbi->s_stripe; 23843eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 23853eb08658SDan Ehrenberg ret = stripe_width; 23863eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 23873eb08658SDan Ehrenberg ret = stride; 23883eb08658SDan Ehrenberg else 23893eb08658SDan Ehrenberg ret = 0; 2390c9de560dSAlex Tomas 23913eb08658SDan Ehrenberg /* 23923eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 23933eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 23943eb08658SDan Ehrenberg */ 23953eb08658SDan Ehrenberg if (ret <= 1) 23963eb08658SDan Ehrenberg ret = 0; 2397c9de560dSAlex Tomas 23983eb08658SDan Ehrenberg return ret; 2399c9de560dSAlex Tomas } 2400ac27a0ecSDave Kleikamp 24013197ebdbSTheodore Ts'o /* sysfs supprt */ 24023197ebdbSTheodore Ts'o 24033197ebdbSTheodore Ts'o struct ext4_attr { 24043197ebdbSTheodore Ts'o struct attribute attr; 24053197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 24063197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 24073197ebdbSTheodore Ts'o const char *, size_t); 24083197ebdbSTheodore Ts'o int offset; 24093197ebdbSTheodore Ts'o }; 24103197ebdbSTheodore Ts'o 24113197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 24123197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 24133197ebdbSTheodore Ts'o { 24143197ebdbSTheodore Ts'o char *endp; 24153197ebdbSTheodore Ts'o 2416e7d2860bSAndré Goddard Rosa *value = simple_strtoul(skip_spaces(buf), &endp, 0); 2417e7d2860bSAndré Goddard Rosa endp = skip_spaces(endp); 24183197ebdbSTheodore Ts'o if (*endp || *value > max) 24193197ebdbSTheodore Ts'o return -EINVAL; 24203197ebdbSTheodore Ts'o 24213197ebdbSTheodore Ts'o return 0; 24223197ebdbSTheodore Ts'o } 24233197ebdbSTheodore Ts'o 24243197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 24253197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24263197ebdbSTheodore Ts'o char *buf) 24273197ebdbSTheodore Ts'o { 24283197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 24297b415bf6SAditya Kali (s64) EXT4_C2B(sbi, 24307b415bf6SAditya Kali percpu_counter_sum(&sbi->s_dirtyclusters_counter))); 24313197ebdbSTheodore Ts'o } 24323197ebdbSTheodore Ts'o 24333197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 24343197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24353197ebdbSTheodore Ts'o { 24363197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24373197ebdbSTheodore Ts'o 2438f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2439f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24403197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 24413197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 24423197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 24433197ebdbSTheodore Ts'o } 24443197ebdbSTheodore Ts'o 24453197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 24463197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24473197ebdbSTheodore Ts'o { 24483197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24493197ebdbSTheodore Ts'o 2450f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2451f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24523197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2453a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 24543197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2455a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 24563197ebdbSTheodore Ts'o } 24573197ebdbSTheodore Ts'o 24583197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 24593197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24603197ebdbSTheodore Ts'o const char *buf, size_t count) 24613197ebdbSTheodore Ts'o { 24623197ebdbSTheodore Ts'o unsigned long t; 24633197ebdbSTheodore Ts'o 24643197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 24653197ebdbSTheodore Ts'o return -EINVAL; 24663197ebdbSTheodore Ts'o 24675dbd571dSAlexander V. Lukyanov if (t && !is_power_of_2(t)) 24683197ebdbSTheodore Ts'o return -EINVAL; 24693197ebdbSTheodore Ts'o 24703197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 24713197ebdbSTheodore Ts'o return count; 24723197ebdbSTheodore Ts'o } 24733197ebdbSTheodore Ts'o 24743197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 24753197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24763197ebdbSTheodore Ts'o { 24773197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 24783197ebdbSTheodore Ts'o 24793197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 24803197ebdbSTheodore Ts'o } 24813197ebdbSTheodore Ts'o 24823197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 24833197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24843197ebdbSTheodore Ts'o const char *buf, size_t count) 24853197ebdbSTheodore Ts'o { 24863197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 24873197ebdbSTheodore Ts'o unsigned long t; 24883197ebdbSTheodore Ts'o 24893197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 24903197ebdbSTheodore Ts'o return -EINVAL; 24913197ebdbSTheodore Ts'o *ui = t; 24923197ebdbSTheodore Ts'o return count; 24933197ebdbSTheodore Ts'o } 24943197ebdbSTheodore Ts'o 24952c0544b2STheodore Ts'o static ssize_t trigger_test_error(struct ext4_attr *a, 24962c0544b2STheodore Ts'o struct ext4_sb_info *sbi, 24972c0544b2STheodore Ts'o const char *buf, size_t count) 24982c0544b2STheodore Ts'o { 24992c0544b2STheodore Ts'o int len = count; 25002c0544b2STheodore Ts'o 25012c0544b2STheodore Ts'o if (!capable(CAP_SYS_ADMIN)) 25022c0544b2STheodore Ts'o return -EPERM; 25032c0544b2STheodore Ts'o 25042c0544b2STheodore Ts'o if (len && buf[len-1] == '\n') 25052c0544b2STheodore Ts'o len--; 25062c0544b2STheodore Ts'o 25072c0544b2STheodore Ts'o if (len) 25082c0544b2STheodore Ts'o ext4_error(sbi->s_sb, "%.*s", len, buf); 25092c0544b2STheodore Ts'o return count; 25102c0544b2STheodore Ts'o } 25112c0544b2STheodore Ts'o 25123197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 25133197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 25143197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 25153197ebdbSTheodore Ts'o .show = _show, \ 25163197ebdbSTheodore Ts'o .store = _store, \ 25173197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 25183197ebdbSTheodore Ts'o } 25193197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 25203197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 25213197ebdbSTheodore Ts'o 2522857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 25233197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 25243197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 25253197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 25263197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 25273197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 25283197ebdbSTheodore Ts'o 25293197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 25303197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 25313197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 25323197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 25333197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 253411013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 25353197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 25363197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 25373197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 25383197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 25393197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 25403197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 254155138e0bSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); 254267a5da56SZheng Liu EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); 25432c0544b2STheodore Ts'o EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error); 25443197ebdbSTheodore Ts'o 25453197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 25463197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 25473197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 25483197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 25493197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 255011013911SAndreas Dilger ATTR_LIST(inode_goal), 25513197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 25523197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 25533197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 25543197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 25553197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 25563197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 255755138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 255867a5da56SZheng Liu ATTR_LIST(extent_max_zeroout_kb), 25592c0544b2STheodore Ts'o ATTR_LIST(trigger_fs_error), 25603197ebdbSTheodore Ts'o NULL, 25613197ebdbSTheodore Ts'o }; 25623197ebdbSTheodore Ts'o 2563857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2564857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 256527ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 2566857ac889SLukas Czerner 2567857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2568857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 256927ee40dfSLukas Czerner ATTR_LIST(batched_discard), 2570857ac889SLukas Czerner NULL, 2571857ac889SLukas Czerner }; 2572857ac889SLukas Czerner 25733197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 25743197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 25753197ebdbSTheodore Ts'o { 25763197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25773197ebdbSTheodore Ts'o s_kobj); 25783197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 25793197ebdbSTheodore Ts'o 25803197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 25813197ebdbSTheodore Ts'o } 25823197ebdbSTheodore Ts'o 25833197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 25843197ebdbSTheodore Ts'o struct attribute *attr, 25853197ebdbSTheodore Ts'o const char *buf, size_t len) 25863197ebdbSTheodore Ts'o { 25873197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25883197ebdbSTheodore Ts'o s_kobj); 25893197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 25903197ebdbSTheodore Ts'o 25913197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 25923197ebdbSTheodore Ts'o } 25933197ebdbSTheodore Ts'o 25943197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 25953197ebdbSTheodore Ts'o { 25963197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25973197ebdbSTheodore Ts'o s_kobj); 25983197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 25993197ebdbSTheodore Ts'o } 26003197ebdbSTheodore Ts'o 260152cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 26023197ebdbSTheodore Ts'o .show = ext4_attr_show, 26033197ebdbSTheodore Ts'o .store = ext4_attr_store, 26043197ebdbSTheodore Ts'o }; 26053197ebdbSTheodore Ts'o 26063197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 26073197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 26083197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 26093197ebdbSTheodore Ts'o .release = ext4_sb_release, 26103197ebdbSTheodore Ts'o }; 26113197ebdbSTheodore Ts'o 2612857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2613857ac889SLukas Czerner { 2614857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2615857ac889SLukas Czerner } 2616857ac889SLukas Czerner 2617857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2618857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2619857ac889SLukas Czerner .sysfs_ops = &ext4_attr_ops, 2620857ac889SLukas Czerner .release = ext4_feat_release, 2621857ac889SLukas Czerner }; 2622857ac889SLukas Czerner 2623a13fb1a4SEric Sandeen /* 2624a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2625a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2626a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2627a13fb1a4SEric Sandeen * 0 if it cannot be. 2628a13fb1a4SEric Sandeen */ 2629a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2630a13fb1a4SEric Sandeen { 2631a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2632a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2633a13fb1a4SEric Sandeen "Couldn't mount because of " 2634a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2635a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2636a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2637a13fb1a4SEric Sandeen return 0; 2638a13fb1a4SEric Sandeen } 2639a13fb1a4SEric Sandeen 2640a13fb1a4SEric Sandeen if (readonly) 2641a13fb1a4SEric Sandeen return 1; 2642a13fb1a4SEric Sandeen 2643a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2644a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2645a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2646a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2647a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2648a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2649a13fb1a4SEric Sandeen return 0; 2650a13fb1a4SEric Sandeen } 2651a13fb1a4SEric Sandeen /* 2652a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2653a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2654a13fb1a4SEric Sandeen */ 2655a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2656a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2657a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2658a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2659a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2660a13fb1a4SEric Sandeen return 0; 2661a13fb1a4SEric Sandeen } 2662a13fb1a4SEric Sandeen } 2663bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && 2664bab08ab9STheodore Ts'o !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { 2665bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2666bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2667bab08ab9STheodore Ts'o "extents feature\n"); 2668bab08ab9STheodore Ts'o return 0; 2669bab08ab9STheodore Ts'o } 26707c319d32SAditya Kali 26717c319d32SAditya Kali #ifndef CONFIG_QUOTA 26727c319d32SAditya Kali if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 26737c319d32SAditya Kali !readonly) { 26747c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 26757c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 26767c319d32SAditya Kali "without CONFIG_QUOTA"); 26777c319d32SAditya Kali return 0; 26787c319d32SAditya Kali } 26797c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2680a13fb1a4SEric Sandeen return 1; 2681a13fb1a4SEric Sandeen } 2682a13fb1a4SEric Sandeen 268366e61a9eSTheodore Ts'o /* 268466e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 268566e61a9eSTheodore Ts'o * on the file system 268666e61a9eSTheodore Ts'o */ 268766e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 268866e61a9eSTheodore Ts'o { 268966e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 269066e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 269166e61a9eSTheodore Ts'o struct ext4_super_block *es; 269266e61a9eSTheodore Ts'o 269366e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 269466e61a9eSTheodore Ts'o es = sbi->s_es; 269566e61a9eSTheodore Ts'o 269666e61a9eSTheodore Ts'o if (es->s_error_count) 269766e61a9eSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count: %u", 269866e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 269966e61a9eSTheodore Ts'o if (es->s_first_error_time) { 270066e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", 270166e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 270266e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 270366e61a9eSTheodore Ts'o es->s_first_error_func, 270466e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 270566e61a9eSTheodore Ts'o if (es->s_first_error_ino) 270666e61a9eSTheodore Ts'o printk(": inode %u", 270766e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 270866e61a9eSTheodore Ts'o if (es->s_first_error_block) 270966e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 271066e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 271166e61a9eSTheodore Ts'o printk("\n"); 271266e61a9eSTheodore Ts'o } 271366e61a9eSTheodore Ts'o if (es->s_last_error_time) { 271466e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", 271566e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 271666e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 271766e61a9eSTheodore Ts'o es->s_last_error_func, 271866e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 271966e61a9eSTheodore Ts'o if (es->s_last_error_ino) 272066e61a9eSTheodore Ts'o printk(": inode %u", 272166e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 272266e61a9eSTheodore Ts'o if (es->s_last_error_block) 272366e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 272466e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 272566e61a9eSTheodore Ts'o printk("\n"); 272666e61a9eSTheodore Ts'o } 272766e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 272866e61a9eSTheodore Ts'o } 272966e61a9eSTheodore Ts'o 2730bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2731bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2732bfff6873SLukas Czerner { 2733bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2734bfff6873SLukas Czerner ext4_group_t group, ngroups; 2735bfff6873SLukas Czerner struct super_block *sb; 2736bfff6873SLukas Czerner unsigned long timeout = 0; 2737bfff6873SLukas Czerner int ret = 0; 2738bfff6873SLukas Czerner 2739bfff6873SLukas Czerner sb = elr->lr_super; 2740bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2741bfff6873SLukas Czerner 27428e8ad8a5SJan Kara sb_start_write(sb); 2743bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2744bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2745bfff6873SLukas Czerner if (!gdp) { 2746bfff6873SLukas Czerner ret = 1; 2747bfff6873SLukas Czerner break; 2748bfff6873SLukas Czerner } 2749bfff6873SLukas Czerner 2750bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2751bfff6873SLukas Czerner break; 2752bfff6873SLukas Czerner } 2753bfff6873SLukas Czerner 2754bfff6873SLukas Czerner if (group == ngroups) 2755bfff6873SLukas Czerner ret = 1; 2756bfff6873SLukas Czerner 2757bfff6873SLukas Czerner if (!ret) { 2758bfff6873SLukas Czerner timeout = jiffies; 2759bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2760bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2761bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 276251ce6511SLukas Czerner timeout = (jiffies - timeout) * 276351ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2764bfff6873SLukas Czerner elr->lr_timeout = timeout; 2765bfff6873SLukas Czerner } 2766bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2767bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2768bfff6873SLukas Czerner } 27698e8ad8a5SJan Kara sb_end_write(sb); 2770bfff6873SLukas Czerner 2771bfff6873SLukas Czerner return ret; 2772bfff6873SLukas Czerner } 2773bfff6873SLukas Czerner 2774bfff6873SLukas Czerner /* 2775bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 27764ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2777bfff6873SLukas Czerner */ 2778bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2779bfff6873SLukas Czerner { 2780bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2781bfff6873SLukas Czerner 2782bfff6873SLukas Czerner if (!elr) 2783bfff6873SLukas Czerner return; 2784bfff6873SLukas Czerner 2785bfff6873SLukas Czerner sbi = elr->lr_sbi; 2786bfff6873SLukas Czerner 2787bfff6873SLukas Czerner list_del(&elr->lr_request); 2788bfff6873SLukas Czerner sbi->s_li_request = NULL; 2789bfff6873SLukas Czerner kfree(elr); 2790bfff6873SLukas Czerner } 2791bfff6873SLukas Czerner 2792bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2793bfff6873SLukas Czerner { 27941bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 27951bb933fbSLukas Czerner if (!ext4_li_info) { 27961bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2797bfff6873SLukas Czerner return; 27981bb933fbSLukas Czerner } 2799bfff6873SLukas Czerner 2800bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 28011bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2802bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 28031bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2804bfff6873SLukas Czerner } 2805bfff6873SLukas Czerner 28068f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 28078f1f7453SEric Sandeen 2808bfff6873SLukas Czerner /* 2809bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2810bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2811bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2812bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2813bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2814bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2815bfff6873SLukas Czerner * next waking time and put itself into sleep. 2816bfff6873SLukas Czerner */ 2817bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2818bfff6873SLukas Czerner { 2819bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2820bfff6873SLukas Czerner struct list_head *pos, *n; 2821bfff6873SLukas Czerner struct ext4_li_request *elr; 28224ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2823bfff6873SLukas Czerner 2824bfff6873SLukas Czerner BUG_ON(NULL == eli); 2825bfff6873SLukas Czerner 2826bfff6873SLukas Czerner cont_thread: 2827bfff6873SLukas Czerner while (true) { 2828bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2829bfff6873SLukas Czerner 2830bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2831bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2832bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2833bfff6873SLukas Czerner goto exit_thread; 2834bfff6873SLukas Czerner } 2835bfff6873SLukas Czerner 2836bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2837bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2838bfff6873SLukas Czerner lr_request); 2839bfff6873SLukas Czerner 2840b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2841b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2842b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2843bfff6873SLukas Czerner ext4_remove_li_request(elr); 2844bfff6873SLukas Czerner continue; 2845bfff6873SLukas Czerner } 2846b2c78cd0STheodore Ts'o } 2847bfff6873SLukas Czerner 2848bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2849bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2850bfff6873SLukas Czerner } 2851bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2852bfff6873SLukas Czerner 2853a0acae0eSTejun Heo try_to_freeze(); 2854bfff6873SLukas Czerner 28554ed5c033SLukas Czerner cur = jiffies; 28564ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2857f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2858bfff6873SLukas Czerner cond_resched(); 2859bfff6873SLukas Czerner continue; 2860bfff6873SLukas Czerner } 2861bfff6873SLukas Czerner 28624ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 28634ed5c033SLukas Czerner 28648f1f7453SEric Sandeen if (kthread_should_stop()) { 28658f1f7453SEric Sandeen ext4_clear_request_list(); 28668f1f7453SEric Sandeen goto exit_thread; 28678f1f7453SEric Sandeen } 2868bfff6873SLukas Czerner } 2869bfff6873SLukas Czerner 2870bfff6873SLukas Czerner exit_thread: 2871bfff6873SLukas Czerner /* 2872bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2873bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2874bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2875bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2876bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2877bfff6873SLukas Czerner * new one. 2878bfff6873SLukas Czerner */ 2879bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2880bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2881bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 2882bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2883bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2884bfff6873SLukas Czerner goto cont_thread; 2885bfff6873SLukas Czerner } 2886bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2887bfff6873SLukas Czerner kfree(ext4_li_info); 2888bfff6873SLukas Czerner ext4_li_info = NULL; 2889bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2890bfff6873SLukas Czerner 2891bfff6873SLukas Czerner return 0; 2892bfff6873SLukas Czerner } 2893bfff6873SLukas Czerner 2894bfff6873SLukas Czerner static void ext4_clear_request_list(void) 2895bfff6873SLukas Czerner { 2896bfff6873SLukas Czerner struct list_head *pos, *n; 2897bfff6873SLukas Czerner struct ext4_li_request *elr; 2898bfff6873SLukas Czerner 2899bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2900bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 2901bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2902bfff6873SLukas Czerner lr_request); 2903bfff6873SLukas Czerner ext4_remove_li_request(elr); 2904bfff6873SLukas Czerner } 2905bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2906bfff6873SLukas Czerner } 2907bfff6873SLukas Czerner 2908bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 2909bfff6873SLukas Czerner { 29108f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 29118f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 29128f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 29138f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 2914bfff6873SLukas Czerner ext4_clear_request_list(); 2915bfff6873SLukas Czerner kfree(ext4_li_info); 2916bfff6873SLukas Czerner ext4_li_info = NULL; 291792b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 2918bfff6873SLukas Czerner "initialization thread\n", 2919bfff6873SLukas Czerner err); 2920bfff6873SLukas Czerner return err; 2921bfff6873SLukas Czerner } 2922bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 2923bfff6873SLukas Czerner return 0; 2924bfff6873SLukas Czerner } 2925bfff6873SLukas Czerner 2926bfff6873SLukas Czerner /* 2927bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 2928bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 2929bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 2930bfff6873SLukas Czerner * groups and return total number of groups. 2931bfff6873SLukas Czerner */ 2932bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 2933bfff6873SLukas Czerner { 2934bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 2935bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2936bfff6873SLukas Czerner 2937bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 2938bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2939bfff6873SLukas Czerner if (!gdp) 2940bfff6873SLukas Czerner continue; 2941bfff6873SLukas Czerner 2942bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2943bfff6873SLukas Czerner break; 2944bfff6873SLukas Czerner } 2945bfff6873SLukas Czerner 2946bfff6873SLukas Czerner return group; 2947bfff6873SLukas Czerner } 2948bfff6873SLukas Czerner 2949bfff6873SLukas Czerner static int ext4_li_info_new(void) 2950bfff6873SLukas Czerner { 2951bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 2952bfff6873SLukas Czerner 2953bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 2954bfff6873SLukas Czerner if (!eli) 2955bfff6873SLukas Czerner return -ENOMEM; 2956bfff6873SLukas Czerner 2957bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 2958bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 2959bfff6873SLukas Czerner 2960bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 2961bfff6873SLukas Czerner 2962bfff6873SLukas Czerner ext4_li_info = eli; 2963bfff6873SLukas Czerner 2964bfff6873SLukas Czerner return 0; 2965bfff6873SLukas Czerner } 2966bfff6873SLukas Czerner 2967bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 2968bfff6873SLukas Czerner ext4_group_t start) 2969bfff6873SLukas Czerner { 2970bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2971bfff6873SLukas Czerner struct ext4_li_request *elr; 2972bfff6873SLukas Czerner unsigned long rnd; 2973bfff6873SLukas Czerner 2974bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 2975bfff6873SLukas Czerner if (!elr) 2976bfff6873SLukas Czerner return NULL; 2977bfff6873SLukas Czerner 2978bfff6873SLukas Czerner elr->lr_super = sb; 2979bfff6873SLukas Czerner elr->lr_sbi = sbi; 2980bfff6873SLukas Czerner elr->lr_next_group = start; 2981bfff6873SLukas Czerner 2982bfff6873SLukas Czerner /* 2983bfff6873SLukas Czerner * Randomize first schedule time of the request to 2984bfff6873SLukas Czerner * spread the inode table initialization requests 2985bfff6873SLukas Czerner * better. 2986bfff6873SLukas Czerner */ 2987bfff6873SLukas Czerner get_random_bytes(&rnd, sizeof(rnd)); 2988bfff6873SLukas Czerner elr->lr_next_sched = jiffies + (unsigned long)rnd % 2989bfff6873SLukas Czerner (EXT4_DEF_LI_MAX_START_DELAY * HZ); 2990bfff6873SLukas Czerner 2991bfff6873SLukas Czerner return elr; 2992bfff6873SLukas Czerner } 2993bfff6873SLukas Czerner 2994bfff6873SLukas Czerner static int ext4_register_li_request(struct super_block *sb, 2995bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 2996bfff6873SLukas Czerner { 2997bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2998bfff6873SLukas Czerner struct ext4_li_request *elr; 2999bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 30006c5a6cb9SAndrew Morton int ret = 0; 3001bfff6873SLukas Czerner 300251ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 300351ce6511SLukas Czerner /* 300451ce6511SLukas Czerner * Reset timeout so it can be computed again, because 300551ce6511SLukas Czerner * s_li_wait_mult might have changed. 300651ce6511SLukas Czerner */ 300751ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 3008beed5ecbSNicolas Kaiser return 0; 300951ce6511SLukas Czerner } 3010bfff6873SLukas Czerner 3011bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 3012bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 301355ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 3014beed5ecbSNicolas Kaiser return 0; 3015bfff6873SLukas Czerner 3016bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 3017beed5ecbSNicolas Kaiser if (!elr) 3018beed5ecbSNicolas Kaiser return -ENOMEM; 3019bfff6873SLukas Czerner 3020bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3021bfff6873SLukas Czerner 3022bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3023bfff6873SLukas Czerner ret = ext4_li_info_new(); 3024bfff6873SLukas Czerner if (ret) 3025bfff6873SLukas Czerner goto out; 3026bfff6873SLukas Czerner } 3027bfff6873SLukas Czerner 3028bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3029bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3030bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3031bfff6873SLukas Czerner 3032bfff6873SLukas Czerner sbi->s_li_request = elr; 303346e4690bSTao Ma /* 303446e4690bSTao Ma * set elr to NULL here since it has been inserted to 303546e4690bSTao Ma * the request_list and the removal and free of it is 303646e4690bSTao Ma * handled by ext4_clear_request_list from now on. 303746e4690bSTao Ma */ 303846e4690bSTao Ma elr = NULL; 3039bfff6873SLukas Czerner 3040bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3041bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3042bfff6873SLukas Czerner if (ret) 3043bfff6873SLukas Czerner goto out; 3044bfff6873SLukas Czerner } 3045bfff6873SLukas Czerner out: 3046bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3047beed5ecbSNicolas Kaiser if (ret) 3048bfff6873SLukas Czerner kfree(elr); 3049bfff6873SLukas Czerner return ret; 3050bfff6873SLukas Czerner } 3051bfff6873SLukas Czerner 3052bfff6873SLukas Czerner /* 3053bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3054bfff6873SLukas Czerner * module unload. 3055bfff6873SLukas Czerner */ 3056bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3057bfff6873SLukas Czerner { 3058bfff6873SLukas Czerner /* 3059bfff6873SLukas Czerner * If thread exited earlier 3060bfff6873SLukas Czerner * there's nothing to be done. 3061bfff6873SLukas Czerner */ 30628f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3063bfff6873SLukas Czerner return; 3064bfff6873SLukas Czerner 30658f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3066bfff6873SLukas Czerner } 3067bfff6873SLukas Czerner 306825ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 306925ed6e8aSDarrick J. Wong { 307025ed6e8aSDarrick J. Wong int ret = 1; 307125ed6e8aSDarrick J. Wong int compat, incompat; 307225ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 307325ed6e8aSDarrick J. Wong 307425ed6e8aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 307525ed6e8aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 307625ed6e8aSDarrick J. Wong /* journal checksum v2 */ 307725ed6e8aSDarrick J. Wong compat = 0; 307825ed6e8aSDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V2; 307925ed6e8aSDarrick J. Wong } else { 308025ed6e8aSDarrick J. Wong /* journal checksum v1 */ 308125ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 308225ed6e8aSDarrick J. Wong incompat = 0; 308325ed6e8aSDarrick J. Wong } 308425ed6e8aSDarrick J. Wong 308525ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 308625ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 308725ed6e8aSDarrick J. Wong compat, 0, 308825ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 308925ed6e8aSDarrick J. Wong incompat); 309025ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 309125ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 309225ed6e8aSDarrick J. Wong compat, 0, 309325ed6e8aSDarrick J. Wong incompat); 309425ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 309525ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 309625ed6e8aSDarrick J. Wong } else { 309725ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 309825ed6e8aSDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 309925ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 310025ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 310125ed6e8aSDarrick J. Wong } 310225ed6e8aSDarrick J. Wong 310325ed6e8aSDarrick J. Wong return ret; 310425ed6e8aSDarrick J. Wong } 310525ed6e8aSDarrick J. Wong 3106952fc18eSTheodore Ts'o /* 3107952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3108952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3109952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3110952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3111952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3112952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3113952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3114952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3115952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3116952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3117952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3118952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3119952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3120952fc18eSTheodore Ts'o */ 3121952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3122952fc18eSTheodore Ts'o char *buf) 3123952fc18eSTheodore Ts'o { 3124952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3125952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3126952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3127952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3128952fc18eSTheodore Ts'o int s, j, count = 0; 3129952fc18eSTheodore Ts'o 31300548bbb8STheodore Ts'o if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC)) 31310548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 31320548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 31330548bbb8STheodore Ts'o 3134952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3135952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3136952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3137952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3138952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3139952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3140952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3141952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3142952fc18eSTheodore Ts'o count++; 3143952fc18eSTheodore Ts'o } 3144952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3145952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3146952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3147952fc18eSTheodore Ts'o count++; 3148952fc18eSTheodore Ts'o } 3149952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3150952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3151952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3152952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3153952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3154952fc18eSTheodore Ts'o count++; 3155952fc18eSTheodore Ts'o } 3156952fc18eSTheodore Ts'o if (i != grp) 3157952fc18eSTheodore Ts'o continue; 3158952fc18eSTheodore Ts'o s = 0; 3159952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3160952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3161952fc18eSTheodore Ts'o count++; 3162952fc18eSTheodore Ts'o } 3163952fc18eSTheodore Ts'o for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { 3164952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3165952fc18eSTheodore Ts'o count++; 3166952fc18eSTheodore Ts'o } 3167952fc18eSTheodore Ts'o } 3168952fc18eSTheodore Ts'o if (!count) 3169952fc18eSTheodore Ts'o return 0; 3170952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3171952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3172952fc18eSTheodore Ts'o } 3173952fc18eSTheodore Ts'o 3174952fc18eSTheodore Ts'o /* 3175952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3176952fc18eSTheodore Ts'o */ 3177952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3178952fc18eSTheodore Ts'o { 3179952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3180952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 3181952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3182952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 3183952fc18eSTheodore Ts'o char *buf = (char *) get_zeroed_page(GFP_KERNEL); 3184952fc18eSTheodore Ts'o 3185952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3186952fc18eSTheodore Ts'o if (!buf) 3187952fc18eSTheodore Ts'o return -ENOMEM; 3188952fc18eSTheodore Ts'o 3189952fc18eSTheodore Ts'o /* 3190952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3191952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3192952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3193952fc18eSTheodore Ts'o */ 3194952fc18eSTheodore Ts'o 3195952fc18eSTheodore Ts'o /* 3196952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3197952fc18eSTheodore Ts'o */ 3198952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3199952fc18eSTheodore Ts'o 3200952fc18eSTheodore Ts'o /* 3201952fc18eSTheodore Ts'o * Add the overhead found in each block group 3202952fc18eSTheodore Ts'o */ 3203952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3204952fc18eSTheodore Ts'o int blks; 3205952fc18eSTheodore Ts'o 3206952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3207952fc18eSTheodore Ts'o overhead += blks; 3208952fc18eSTheodore Ts'o if (blks) 3209952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3210952fc18eSTheodore Ts'o cond_resched(); 3211952fc18eSTheodore Ts'o } 3212952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3213952fc18eSTheodore Ts'o smp_wmb(); 3214952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3215952fc18eSTheodore Ts'o return 0; 3216952fc18eSTheodore Ts'o } 3217952fc18eSTheodore Ts'o 3218617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3219ac27a0ecSDave Kleikamp { 3220d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3221ac27a0ecSDave Kleikamp struct buffer_head *bh; 3222617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3223617ba13bSMingming Cao struct ext4_sb_info *sbi; 3224617ba13bSMingming Cao ext4_fsblk_t block; 3225617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 322670bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3227ac27a0ecSDave Kleikamp unsigned long offset = 0; 3228ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3229ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3230ac27a0ecSDave Kleikamp struct inode *root; 32319f6200bbSTheodore Ts'o char *cp; 32320390131bSFrank Mayhar const char *descr; 3233dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3234281b5995STheodore Ts'o int blocksize, clustersize; 32354ec11028STheodore Ts'o unsigned int db_count; 32364ec11028STheodore Ts'o unsigned int i; 3237281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3238bd81d8eeSLaurent Vivier __u64 blocks_count; 3239833f4077SPeter Zijlstra int err; 3240b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3241bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3242ac27a0ecSDave Kleikamp 3243ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3244ac27a0ecSDave Kleikamp if (!sbi) 3245dcc7dae3SCyrill Gorcunov goto out_free_orig; 3246705895b6SPekka Enberg 3247705895b6SPekka Enberg sbi->s_blockgroup_lock = 3248705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3249705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3250705895b6SPekka Enberg kfree(sbi); 3251dcc7dae3SCyrill Gorcunov goto out_free_orig; 3252705895b6SPekka Enberg } 3253ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 32542c0544b2STheodore Ts'o sbi->s_sb = sb; 3255ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 325608cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, EXT4_DEF_RESUID); 325708cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, EXT4_DEF_RESGID); 3258240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3259d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3260f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3261f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3262f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3263ac27a0ecSDave Kleikamp 32649f6200bbSTheodore Ts'o /* Cleanup superblock name */ 32659f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 32669f6200bbSTheodore Ts'o *cp = '!'; 32679f6200bbSTheodore Ts'o 3268dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3269617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3270ac27a0ecSDave Kleikamp if (!blocksize) { 3271b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3272ac27a0ecSDave Kleikamp goto out_fail; 3273ac27a0ecSDave Kleikamp } 3274ac27a0ecSDave Kleikamp 3275ac27a0ecSDave Kleikamp /* 3276617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3277ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3278ac27a0ecSDave Kleikamp */ 3279617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 328070bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 328170bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3282ac27a0ecSDave Kleikamp } else { 328370bbb3e0SAndrew Morton logical_sb_block = sb_block; 3284ac27a0ecSDave Kleikamp } 3285ac27a0ecSDave Kleikamp 328670bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 3287b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3288ac27a0ecSDave Kleikamp goto out_fail; 3289ac27a0ecSDave Kleikamp } 3290ac27a0ecSDave Kleikamp /* 3291ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3292617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3293ac27a0ecSDave Kleikamp */ 32942716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3295ac27a0ecSDave Kleikamp sbi->s_es = es; 3296ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3297617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3298617ba13bSMingming Cao goto cantfind_ext4; 3299afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3300ac27a0ecSDave Kleikamp 3301feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3302feb0ab32SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3303feb0ab32SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 3304feb0ab32SDarrick J. Wong EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) 3305feb0ab32SDarrick J. Wong ext4_warning(sb, KERN_INFO "metadata_csum and uninit_bg are " 3306feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3307feb0ab32SDarrick J. Wong 3308d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3309d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3310d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3311d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3312d25425f8SDarrick J. Wong silent = 1; 3313d25425f8SDarrick J. Wong goto cantfind_ext4; 3314d25425f8SDarrick J. Wong } 3315d25425f8SDarrick J. Wong 33160441984aSDarrick J. Wong /* Load the checksum driver */ 33170441984aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 33180441984aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 33190441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 33200441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 33210441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 33220441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 33230441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 33240441984aSDarrick J. Wong goto failed_mount; 33250441984aSDarrick J. Wong } 33260441984aSDarrick J. Wong } 33270441984aSDarrick J. Wong 3328a9c47317SDarrick J. Wong /* Check superblock checksum */ 3329a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3330a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3331a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3332a9c47317SDarrick J. Wong silent = 1; 3333a9c47317SDarrick J. Wong goto cantfind_ext4; 3334a9c47317SDarrick J. Wong } 3335a9c47317SDarrick J. Wong 3336a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 3337a9c47317SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3338a9c47317SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 3339a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3340a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3341a9c47317SDarrick J. Wong 3342ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3343ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3344fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3345617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3346fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 334787f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3348fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3349617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3350fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3351ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 335203010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 3353fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 33542e7842b8SHugh Dickins #endif 335503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3356fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 33572e7842b8SHugh Dickins #endif 33586fd7a467STheodore Ts'o set_opt(sb, MBLK_IO_SUBMIT); 3359617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3360fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3361617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3362fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3363617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3364fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3365ac27a0ecSDave Kleikamp 3366617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3367fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3368bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3369fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3370bb4f397aSAneesh Kumar K.V else 3371fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 33728b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) 3373fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 33748b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3375fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3376ac27a0ecSDave Kleikamp 337708cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 337808cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 337930773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 338030773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 338130773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3382ac27a0ecSDave Kleikamp 33838b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3384fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3385ac27a0ecSDave Kleikamp 33861e2462f9SMingming Cao /* 3387dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3388dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3389dd919b98SAneesh Kumar K.V */ 33908b67f04aSTheodore Ts'o if (!IS_EXT3_SB(sb) && 33918b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3392fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3393dd919b98SAneesh Kumar K.V 339451ce6511SLukas Czerner /* 339551ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 339651ce6511SLukas Czerner * no mount option specified. 339751ce6511SLukas Czerner */ 339851ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 339951ce6511SLukas Czerner 34008b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 3401661aa520SEric Sandeen &journal_devnum, &journal_ioprio, 0)) { 34028b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 34038b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 34048b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 34058b67f04aSTheodore Ts'o } 34065a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3407b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3408661aa520SEric Sandeen &journal_ioprio, 0)) 3409ac27a0ecSDave Kleikamp goto failed_mount; 3410ac27a0ecSDave Kleikamp 341156889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 341256889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 341356889787STheodore Ts'o "with data=journal disables delayed " 341456889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 341556889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 341656889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 341756889787STheodore Ts'o "both data=journal and delalloc"); 341856889787STheodore Ts'o goto failed_mount; 341956889787STheodore Ts'o } 342056889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 342156889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 342256889787STheodore Ts'o "both data=journal and delalloc"); 342356889787STheodore Ts'o goto failed_mount; 342456889787STheodore Ts'o } 342556889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 342656889787STheodore Ts'o clear_opt(sb, DELALLOC); 342756889787STheodore Ts'o } 342856889787STheodore Ts'o 342956889787STheodore Ts'o blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 343056889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 343156889787STheodore Ts'o if (blocksize < PAGE_SIZE) { 343256889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 343356889787STheodore Ts'o "dioread_nolock if block size != PAGE_SIZE"); 343456889787STheodore Ts'o goto failed_mount; 343556889787STheodore Ts'o } 343656889787STheodore Ts'o } 343756889787STheodore Ts'o 3438ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3439482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3440ac27a0ecSDave Kleikamp 3441617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3442617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3443617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3444617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3445b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3446b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3447b31e1552SEric Sandeen "running e2fsck is recommended"); 3448469108ffSTheodore Tso 34492035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 34502035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 34512035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 34522035e776STheodore Ts'o "using the ext4 subsystem"); 34532035e776STheodore Ts'o else { 34542035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 34552035e776STheodore Ts'o "to feature incompatibilities"); 34562035e776STheodore Ts'o goto failed_mount; 34572035e776STheodore Ts'o } 34582035e776STheodore Ts'o } 34592035e776STheodore Ts'o 34602035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 34612035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 34622035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 34632035e776STheodore Ts'o "using the ext4 subsystem"); 34642035e776STheodore Ts'o else { 34652035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 34662035e776STheodore Ts'o "to feature incompatibilities"); 34672035e776STheodore Ts'o goto failed_mount; 34682035e776STheodore Ts'o } 34692035e776STheodore Ts'o } 34702035e776STheodore Ts'o 3471469108ffSTheodore Tso /* 3472ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3473ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3474ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3475ac27a0ecSDave Kleikamp */ 3476a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3477ac27a0ecSDave Kleikamp goto failed_mount; 3478a13fb1a4SEric Sandeen 3479617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3480617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3481b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3482b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3483ac27a0ecSDave Kleikamp goto failed_mount; 3484ac27a0ecSDave Kleikamp } 3485ac27a0ecSDave Kleikamp 3486ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3487ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3488ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3489b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3490ce40733cSAneesh Kumar K.V blocksize); 3491ac27a0ecSDave Kleikamp goto failed_mount; 3492ac27a0ecSDave Kleikamp } 3493ac27a0ecSDave Kleikamp 3494ac27a0ecSDave Kleikamp brelse(bh); 349570bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 349670bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 349770bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 3498ac27a0ecSDave Kleikamp if (!bh) { 3499b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3500b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3501ac27a0ecSDave Kleikamp goto failed_mount; 3502ac27a0ecSDave Kleikamp } 35032716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3504ac27a0ecSDave Kleikamp sbi->s_es = es; 3505617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3506b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3507b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3508ac27a0ecSDave Kleikamp goto failed_mount; 3509ac27a0ecSDave Kleikamp } 3510ac27a0ecSDave Kleikamp } 3511ac27a0ecSDave Kleikamp 3512a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3513a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3514f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3515f287a1a5STheodore Ts'o has_huge_files); 3516f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3517ac27a0ecSDave Kleikamp 3518617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3519617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3520617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3521ac27a0ecSDave Kleikamp } else { 3522ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3523ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3524617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 35251330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3526ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3527b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3528b31e1552SEric Sandeen "unsupported inode size: %d", 3529ac27a0ecSDave Kleikamp sbi->s_inode_size); 3530ac27a0ecSDave Kleikamp goto failed_mount; 3531ac27a0ecSDave Kleikamp } 3532ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3533ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3534ac27a0ecSDave Kleikamp } 35350b8e58a1SAndreas Dilger 35360d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 35370d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 35388fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 35390d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3540d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3541b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3542b31e1552SEric Sandeen "unsupported descriptor size %lu", 35430d1ee42fSAlexandre Ratchov sbi->s_desc_size); 35440d1ee42fSAlexandre Ratchov goto failed_mount; 35450d1ee42fSAlexandre Ratchov } 35460d1ee42fSAlexandre Ratchov } else 35470d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 35480b8e58a1SAndreas Dilger 3549ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3550ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3551b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3552617ba13bSMingming Cao goto cantfind_ext4; 35530b8e58a1SAndreas Dilger 3554617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3555ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3556617ba13bSMingming Cao goto cantfind_ext4; 3557ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3558ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 35590d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3560ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3561ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3562e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3563e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 35640b8e58a1SAndreas Dilger 3565ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3566ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3567ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3568f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3569f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3570f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3571f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3572f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 3573f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3574f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3575f99b2589STheodore Ts'o #else 3576f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3577f99b2589STheodore Ts'o #endif 3578f99b2589STheodore Ts'o } 3579ac27a0ecSDave Kleikamp 3580281b5995STheodore Ts'o /* Handle clustersize */ 3581281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3582281b5995STheodore Ts'o has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3583281b5995STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC); 3584281b5995STheodore Ts'o if (has_bigalloc) { 3585281b5995STheodore Ts'o if (clustersize < blocksize) { 3586281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3587281b5995STheodore Ts'o "cluster size (%d) smaller than " 3588281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3589281b5995STheodore Ts'o goto failed_mount; 3590281b5995STheodore Ts'o } 3591281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3592281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3593281b5995STheodore Ts'o sbi->s_clusters_per_group = 3594281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3595281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3596281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3597281b5995STheodore Ts'o "#clusters per group too big: %lu", 3598281b5995STheodore Ts'o sbi->s_clusters_per_group); 3599281b5995STheodore Ts'o goto failed_mount; 3600281b5995STheodore Ts'o } 3601281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3602281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3603281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3604281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3605281b5995STheodore Ts'o sbi->s_blocks_per_group, 3606281b5995STheodore Ts'o sbi->s_clusters_per_group); 3607281b5995STheodore Ts'o goto failed_mount; 3608281b5995STheodore Ts'o } 3609281b5995STheodore Ts'o } else { 3610281b5995STheodore Ts'o if (clustersize != blocksize) { 3611281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3612281b5995STheodore Ts'o "block size (%d)", clustersize, 3613281b5995STheodore Ts'o blocksize); 3614281b5995STheodore Ts'o clustersize = blocksize; 3615281b5995STheodore Ts'o } 3616ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3617b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3618b31e1552SEric Sandeen "#blocks per group too big: %lu", 3619ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3620ac27a0ecSDave Kleikamp goto failed_mount; 3621ac27a0ecSDave Kleikamp } 3622281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3623281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3624281b5995STheodore Ts'o } 3625281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3626281b5995STheodore Ts'o 3627ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3628b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3629b31e1552SEric Sandeen "#inodes per group too big: %lu", 3630ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3631ac27a0ecSDave Kleikamp goto failed_mount; 3632ac27a0ecSDave Kleikamp } 3633ac27a0ecSDave Kleikamp 3634bf43d84bSEric Sandeen /* 3635bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3636bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3637bf43d84bSEric Sandeen */ 36385a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 363930ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 36405a9ae68aSDarrick J. Wong if (err) { 3641b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3642bf43d84bSEric Sandeen " too large to mount safely on this system"); 3643ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 364490c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 36455a9ae68aSDarrick J. Wong ret = err; 3646ac27a0ecSDave Kleikamp goto failed_mount; 3647ac27a0ecSDave Kleikamp } 3648ac27a0ecSDave Kleikamp 3649617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3650617ba13bSMingming Cao goto cantfind_ext4; 3651e7c95593SEric Sandeen 36520f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 36530f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 36540f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3655b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3656b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 36570f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 36580f2ddca6SFrom: Thiemo Nagel goto failed_mount; 36590f2ddca6SFrom: Thiemo Nagel } 36600f2ddca6SFrom: Thiemo Nagel 36614ec11028STheodore Ts'o /* 36624ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 36634ec11028STheodore Ts'o * of the filesystem. 36644ec11028STheodore Ts'o */ 36654ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3666b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3667b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3668e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 36694ec11028STheodore Ts'o ext4_blocks_count(es)); 3670e7c95593SEric Sandeen goto failed_mount; 3671e7c95593SEric Sandeen } 3672bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3673bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3674bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3675bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 36764ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3677b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 36784ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3679b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 36804ec11028STheodore Ts'o ext4_blocks_count(es), 36814ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 36824ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 36834ec11028STheodore Ts'o goto failed_mount; 36844ec11028STheodore Ts'o } 3685bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3686fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3687fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3688617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3689617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3690f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3691f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3692ac27a0ecSDave Kleikamp GFP_KERNEL); 3693ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3694b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 36952cde417dSTheodore Ts'o ret = -ENOMEM; 3696ac27a0ecSDave Kleikamp goto failed_mount; 3697ac27a0ecSDave Kleikamp } 3698ac27a0ecSDave Kleikamp 36999f6200bbSTheodore Ts'o if (ext4_proc_root) 37009f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 3701240799cdSTheodore Ts'o 370266acdcf4STheodore Ts'o if (sbi->s_proc) 370366acdcf4STheodore Ts'o proc_create_data("options", S_IRUGO, sbi->s_proc, 370466acdcf4STheodore Ts'o &ext4_seq_options_fops, sb); 370566acdcf4STheodore Ts'o 3706705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3707ac27a0ecSDave Kleikamp 3708ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 370970bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3710ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 3711ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3712b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3713b31e1552SEric Sandeen "can't read group descriptor %d", i); 3714ac27a0ecSDave Kleikamp db_count = i; 3715ac27a0ecSDave Kleikamp goto failed_mount2; 3716ac27a0ecSDave Kleikamp } 3717ac27a0ecSDave Kleikamp } 3718bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3719b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3720ac27a0ecSDave Kleikamp goto failed_mount2; 3721ac27a0ecSDave Kleikamp } 3722772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 3723772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 3724b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3725b31e1552SEric Sandeen "unable to initialize " 3726b31e1552SEric Sandeen "flex_bg meta info!"); 3727772cb7c8SJose R. Santos goto failed_mount2; 3728772cb7c8SJose R. Santos } 3729772cb7c8SJose R. Santos 3730ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 3731ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3732ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3733ac27a0ecSDave Kleikamp 373404496411STao Ma init_timer(&sbi->s_err_report); 373504496411STao Ma sbi->s_err_report.function = print_daily_error_info; 373604496411STao Ma sbi->s_err_report.data = (unsigned long) sb; 373704496411STao Ma 373857042651STheodore Ts'o err = percpu_counter_init(&sbi->s_freeclusters_counter, 37395dee5437STheodore Ts'o ext4_count_free_clusters(sb)); 3740ce7e010aSTheodore Ts'o if (!err) { 3741ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeinodes_counter, 3742ce7e010aSTheodore Ts'o ext4_count_free_inodes(sb)); 3743ce7e010aSTheodore Ts'o } 3744ce7e010aSTheodore Ts'o if (!err) { 3745ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 3746ce7e010aSTheodore Ts'o ext4_count_dirs(sb)); 3747ce7e010aSTheodore Ts'o } 3748ce7e010aSTheodore Ts'o if (!err) { 374957042651STheodore Ts'o err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0); 3750ce7e010aSTheodore Ts'o } 3751ce7e010aSTheodore Ts'o if (err) { 3752ce7e010aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 37532cde417dSTheodore Ts'o ret = err; 3754ce7e010aSTheodore Ts'o goto failed_mount3; 3755ce7e010aSTheodore Ts'o } 3756ce7e010aSTheodore Ts'o 3757c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 375855138e0bSTheodore Ts'o sbi->s_max_writeback_mb_bump = 128; 375967a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 3760c9de560dSAlex Tomas 3761ac27a0ecSDave Kleikamp /* 3762ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 3763ac27a0ecSDave Kleikamp */ 37649ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 37659ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 3766617ba13bSMingming Cao sb->s_op = &ext4_sops; 37679ca92389STheodore Ts'o else 37689ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 3769617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3770617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3771ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3772617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 3773617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 37747c319d32SAditya Kali 37757c319d32SAditya Kali if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) { 37767c319d32SAditya Kali /* Use qctl operations for hidden quota files. */ 37777c319d32SAditya Kali sb->s_qcop = &ext4_qctl_sysfile_operations; 37787c319d32SAditya Kali } 3779ac27a0ecSDave Kleikamp #endif 3780f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3781f2fa2ffcSAneesh Kumar K.V 3782ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 37833b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 37848f82f840SYongqiang Yang sbi->s_resize_flags = 0; 3785ac27a0ecSDave Kleikamp 3786ac27a0ecSDave Kleikamp sb->s_root = NULL; 3787ac27a0ecSDave Kleikamp 3788ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3789617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3790617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3791ac27a0ecSDave Kleikamp 3792c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && 3793c5e06d10SJohann Lombardi !(sb->s_flags & MS_RDONLY)) 3794c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 3795c5e06d10SJohann Lombardi goto failed_mount3; 3796c5e06d10SJohann Lombardi 3797ac27a0ecSDave Kleikamp /* 3798ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3799ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3800ac27a0ecSDave Kleikamp */ 3801ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 3802617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 3803617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 3804ac27a0ecSDave Kleikamp goto failed_mount3; 38050390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 38060390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3807b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3808b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3809744692dcSJiaying Zhang goto failed_mount_wq; 3810ac27a0ecSDave Kleikamp } else { 3811fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 38120390131bSFrank Mayhar sbi->s_journal = NULL; 38130390131bSFrank Mayhar needs_recovery = 0; 38140390131bSFrank Mayhar goto no_journal; 3815ac27a0ecSDave Kleikamp } 3816ac27a0ecSDave Kleikamp 3817f32aaf2dSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT) && 3818eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3819eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3820b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3821744692dcSJiaying Zhang goto failed_mount_wq; 3822eb40a09cSJose R. Santos } 3823eb40a09cSJose R. Santos 382425ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 382525ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 382625ed6e8aSDarrick J. Wong "feature set"); 382725ed6e8aSDarrick J. Wong goto failed_mount_wq; 3828d4da6c9cSLinus Torvalds } 3829818d276cSGirish Shilamkar 3830ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 3831ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 3832ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3833ac27a0ecSDave Kleikamp case 0: 3834ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 383563f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 383663f57933SAndrew Morton * cope, else JOURNAL_DATA 383763f57933SAndrew Morton */ 3838dab291afSMingming Cao if (jbd2_journal_check_available_features 3839dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 3840fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3841ac27a0ecSDave Kleikamp else 3842fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3843ac27a0ecSDave Kleikamp break; 3844ac27a0ecSDave Kleikamp 3845617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 3846617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 3847dab291afSMingming Cao if (!jbd2_journal_check_available_features 3848dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 3849b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 3850b31e1552SEric Sandeen "requested data journaling mode"); 3851744692dcSJiaying Zhang goto failed_mount_wq; 3852ac27a0ecSDave Kleikamp } 3853ac27a0ecSDave Kleikamp default: 3854ac27a0ecSDave Kleikamp break; 3855ac27a0ecSDave Kleikamp } 3856b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3857ac27a0ecSDave Kleikamp 385818aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 385918aadd47SBobi Jam 3860ce7e010aSTheodore Ts'o /* 3861ce7e010aSTheodore Ts'o * The journal may have updated the bg summary counts, so we 3862ce7e010aSTheodore Ts'o * need to update the global counters. 3863ce7e010aSTheodore Ts'o */ 386457042651STheodore Ts'o percpu_counter_set(&sbi->s_freeclusters_counter, 38655dee5437STheodore Ts'o ext4_count_free_clusters(sb)); 3866ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_freeinodes_counter, 386784061e07SDmitry Monakhov ext4_count_free_inodes(sb)); 3868ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_dirs_counter, 386984061e07SDmitry Monakhov ext4_count_dirs(sb)); 387057042651STheodore Ts'o percpu_counter_set(&sbi->s_dirtyclusters_counter, 0); 3871206f7ab4SChristoph Hellwig 3872ce7e010aSTheodore Ts'o no_journal: 3873fd89d5f2STejun Heo /* 3874952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 3875952fc18eSTheodore Ts'o * superblock if present. 3876952fc18eSTheodore Ts'o */ 3877952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 3878952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 3879952fc18eSTheodore Ts'o else { 3880952fc18eSTheodore Ts'o ret = ext4_calculate_overhead(sb); 3881952fc18eSTheodore Ts'o if (ret) 3882952fc18eSTheodore Ts'o goto failed_mount_wq; 3883952fc18eSTheodore Ts'o } 3884952fc18eSTheodore Ts'o 3885952fc18eSTheodore Ts'o /* 3886fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 3887fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 3888fd89d5f2STejun Heo */ 3889fd89d5f2STejun Heo EXT4_SB(sb)->dio_unwritten_wq = 3890ae005cbeSLinus Torvalds alloc_workqueue("ext4-dio-unwritten", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 38914c0425ffSMingming Cao if (!EXT4_SB(sb)->dio_unwritten_wq) { 38924c0425ffSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); 38934c0425ffSMingming Cao goto failed_mount_wq; 38944c0425ffSMingming Cao } 38954c0425ffSMingming Cao 3896ac27a0ecSDave Kleikamp /* 3897dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 3898ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 3899ac27a0ecSDave Kleikamp */ 3900ac27a0ecSDave Kleikamp 39011d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 39021d1fe1eeSDavid Howells if (IS_ERR(root)) { 3903b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 39041d1fe1eeSDavid Howells ret = PTR_ERR(root); 390532a9bb57SManish Katiyar root = NULL; 3906ac27a0ecSDave Kleikamp goto failed_mount4; 3907ac27a0ecSDave Kleikamp } 3908ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 3909b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 391094bf608aSAl Viro iput(root); 3911ac27a0ecSDave Kleikamp goto failed_mount4; 3912ac27a0ecSDave Kleikamp } 391348fde701SAl Viro sb->s_root = d_make_root(root); 39141d1fe1eeSDavid Howells if (!sb->s_root) { 3915b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 39161d1fe1eeSDavid Howells ret = -ENOMEM; 39171d1fe1eeSDavid Howells goto failed_mount4; 39181d1fe1eeSDavid Howells } 3919ac27a0ecSDave Kleikamp 39207e84b621SEric Sandeen if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) 39217e84b621SEric Sandeen sb->s_flags |= MS_RDONLY; 3922ef7f3835SKalpak Shah 3923ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 3924ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 3925ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3926ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3927ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3928ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 3929ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3930ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 3931ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3932ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 3933ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3934ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 3935ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3936ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 3937ef7f3835SKalpak Shah } 3938ef7f3835SKalpak Shah } 3939ef7f3835SKalpak Shah /* Check if enough inode space is available */ 3940ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 3941ef7f3835SKalpak Shah sbi->s_inode_size) { 3942ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3943ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3944b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 3945b31e1552SEric Sandeen "available"); 3946ef7f3835SKalpak Shah } 3947ef7f3835SKalpak Shah 39486fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 39496fd058f7STheodore Ts'o if (err) { 3950b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 3951fbe845ddSCurt Wohlgemuth "zone (%d)", err); 395294bf608aSAl Viro goto failed_mount4a; 39536fd058f7STheodore Ts'o } 39546fd058f7STheodore Ts'o 3955c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 39569d99012fSAkira Fujita err = ext4_mb_init(sb); 3957c2774d84SAneesh Kumar K.V if (err) { 3958421f91d2SUwe Kleine-König ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 3959c2774d84SAneesh Kumar K.V err); 3960dcf2d804STao Ma goto failed_mount5; 3961c2774d84SAneesh Kumar K.V } 3962c2774d84SAneesh Kumar K.V 3963bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 3964bfff6873SLukas Czerner if (err) 3965dcf2d804STao Ma goto failed_mount6; 3966bfff6873SLukas Czerner 39673197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 39683197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 39693197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 39703197ebdbSTheodore Ts'o "%s", sb->s_id); 3971dcf2d804STao Ma if (err) 3972dcf2d804STao Ma goto failed_mount7; 39733197ebdbSTheodore Ts'o 3974617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 3975617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 3976617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 39770390131bSFrank Mayhar if (needs_recovery) { 3978b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 3979617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 39800390131bSFrank Mayhar } 39810390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 39820390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 39830390131bSFrank Mayhar descr = " journalled data mode"; 39840390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 39850390131bSFrank Mayhar descr = " ordered data mode"; 39860390131bSFrank Mayhar else 39870390131bSFrank Mayhar descr = " writeback data mode"; 39880390131bSFrank Mayhar } else 39890390131bSFrank Mayhar descr = "out journal"; 39900390131bSFrank Mayhar 39917c319d32SAditya Kali #ifdef CONFIG_QUOTA 39927c319d32SAditya Kali /* Enable quota usage during mount. */ 39937c319d32SAditya Kali if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 39947c319d32SAditya Kali !(sb->s_flags & MS_RDONLY)) { 39957c319d32SAditya Kali ret = ext4_enable_quotas(sb); 39967c319d32SAditya Kali if (ret) 39977c319d32SAditya Kali goto failed_mount7; 39987c319d32SAditya Kali } 39997c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 40007c319d32SAditya Kali 4001d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 40028b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 40038b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 4004ac27a0ecSDave Kleikamp 400566e61a9eSTheodore Ts'o if (es->s_error_count) 400666e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 4007ac27a0ecSDave Kleikamp 4008d4c402d9SCurt Wohlgemuth kfree(orig_data); 4009ac27a0ecSDave Kleikamp return 0; 4010ac27a0ecSDave Kleikamp 4011617ba13bSMingming Cao cantfind_ext4: 4012ac27a0ecSDave Kleikamp if (!silent) 4013b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4014ac27a0ecSDave Kleikamp goto failed_mount; 4015ac27a0ecSDave Kleikamp 4016dcf2d804STao Ma failed_mount7: 4017dcf2d804STao Ma ext4_unregister_li_request(sb); 4018dcf2d804STao Ma failed_mount6: 4019dcf2d804STao Ma ext4_mb_release(sb); 402094bf608aSAl Viro failed_mount5: 402194bf608aSAl Viro ext4_ext_release(sb); 4022dcf2d804STao Ma ext4_release_system_zone(sb); 402394bf608aSAl Viro failed_mount4a: 402494bf608aSAl Viro dput(sb->s_root); 402532a9bb57SManish Katiyar sb->s_root = NULL; 402694bf608aSAl Viro failed_mount4: 4027b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 40284c0425ffSMingming Cao destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); 40294c0425ffSMingming Cao failed_mount_wq: 40300390131bSFrank Mayhar if (sbi->s_journal) { 4031dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 403247b4a50bSJan Kara sbi->s_journal = NULL; 40330390131bSFrank Mayhar } 4034ac27a0ecSDave Kleikamp failed_mount3: 403504496411STao Ma del_timer(&sbi->s_err_report); 40369933fc0aSTheodore Ts'o if (sbi->s_flex_groups) 40379933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 403857042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4039ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4040ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 404157042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 4042c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4043c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4044ac27a0ecSDave Kleikamp failed_mount2: 4045ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4046ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4047f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 4048ac27a0ecSDave Kleikamp failed_mount: 40490441984aSDarrick J. Wong if (sbi->s_chksum_driver) 40500441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4051240799cdSTheodore Ts'o if (sbi->s_proc) { 405266acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 40539f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 4054240799cdSTheodore Ts'o } 4055ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4056ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4057ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4058ac27a0ecSDave Kleikamp #endif 4059617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4060ac27a0ecSDave Kleikamp brelse(bh); 4061ac27a0ecSDave Kleikamp out_fail: 4062ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4063f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 4064ac27a0ecSDave Kleikamp kfree(sbi); 4065dcc7dae3SCyrill Gorcunov out_free_orig: 4066d4c402d9SCurt Wohlgemuth kfree(orig_data); 40671d1fe1eeSDavid Howells return ret; 4068ac27a0ecSDave Kleikamp } 4069ac27a0ecSDave Kleikamp 4070ac27a0ecSDave Kleikamp /* 4071ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4072ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4073ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4074ac27a0ecSDave Kleikamp */ 4075617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4076ac27a0ecSDave Kleikamp { 4077617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4078ac27a0ecSDave Kleikamp 4079ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 408030773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 408130773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4082ac27a0ecSDave Kleikamp 4083a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4084ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4085dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4086ac27a0ecSDave Kleikamp else 4087dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 40885bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 40895bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 40905bf5683aSHidehiro Kawai else 40915bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4092a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4093ac27a0ecSDave Kleikamp } 4094ac27a0ecSDave Kleikamp 4095617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 4096ac27a0ecSDave Kleikamp unsigned int journal_inum) 4097ac27a0ecSDave Kleikamp { 4098ac27a0ecSDave Kleikamp struct inode *journal_inode; 4099ac27a0ecSDave Kleikamp journal_t *journal; 4100ac27a0ecSDave Kleikamp 41010390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 41020390131bSFrank Mayhar 4103ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 4104ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 4105ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 4106ac27a0ecSDave Kleikamp 41071d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 41081d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4109b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4110ac27a0ecSDave Kleikamp return NULL; 4111ac27a0ecSDave Kleikamp } 4112ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4113ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4114ac27a0ecSDave Kleikamp iput(journal_inode); 4115b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4116ac27a0ecSDave Kleikamp return NULL; 4117ac27a0ecSDave Kleikamp } 4118ac27a0ecSDave Kleikamp 4119e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4120ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 41211d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4122b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4123ac27a0ecSDave Kleikamp iput(journal_inode); 4124ac27a0ecSDave Kleikamp return NULL; 4125ac27a0ecSDave Kleikamp } 4126ac27a0ecSDave Kleikamp 4127dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4128ac27a0ecSDave Kleikamp if (!journal) { 4129b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4130ac27a0ecSDave Kleikamp iput(journal_inode); 4131ac27a0ecSDave Kleikamp return NULL; 4132ac27a0ecSDave Kleikamp } 4133ac27a0ecSDave Kleikamp journal->j_private = sb; 4134617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4135ac27a0ecSDave Kleikamp return journal; 4136ac27a0ecSDave Kleikamp } 4137ac27a0ecSDave Kleikamp 4138617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4139ac27a0ecSDave Kleikamp dev_t j_dev) 4140ac27a0ecSDave Kleikamp { 4141ac27a0ecSDave Kleikamp struct buffer_head *bh; 4142ac27a0ecSDave Kleikamp journal_t *journal; 4143617ba13bSMingming Cao ext4_fsblk_t start; 4144617ba13bSMingming Cao ext4_fsblk_t len; 4145ac27a0ecSDave Kleikamp int hblock, blocksize; 4146617ba13bSMingming Cao ext4_fsblk_t sb_block; 4147ac27a0ecSDave Kleikamp unsigned long offset; 4148617ba13bSMingming Cao struct ext4_super_block *es; 4149ac27a0ecSDave Kleikamp struct block_device *bdev; 4150ac27a0ecSDave Kleikamp 41510390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 41520390131bSFrank Mayhar 4153b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4154ac27a0ecSDave Kleikamp if (bdev == NULL) 4155ac27a0ecSDave Kleikamp return NULL; 4156ac27a0ecSDave Kleikamp 4157ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4158e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4159ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4160b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4161b31e1552SEric Sandeen "blocksize too small for journal device"); 4162ac27a0ecSDave Kleikamp goto out_bdev; 4163ac27a0ecSDave Kleikamp } 4164ac27a0ecSDave Kleikamp 4165617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4166617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4167ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4168ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4169b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4170b31e1552SEric Sandeen "external journal"); 4171ac27a0ecSDave Kleikamp goto out_bdev; 4172ac27a0ecSDave Kleikamp } 4173ac27a0ecSDave Kleikamp 41742716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4175617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4176ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4177617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4178b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4179b31e1552SEric Sandeen "bad superblock"); 4180ac27a0ecSDave Kleikamp brelse(bh); 4181ac27a0ecSDave Kleikamp goto out_bdev; 4182ac27a0ecSDave Kleikamp } 4183ac27a0ecSDave Kleikamp 4184617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4185b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4186ac27a0ecSDave Kleikamp brelse(bh); 4187ac27a0ecSDave Kleikamp goto out_bdev; 4188ac27a0ecSDave Kleikamp } 4189ac27a0ecSDave Kleikamp 4190bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4191ac27a0ecSDave Kleikamp start = sb_block + 1; 4192ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4193ac27a0ecSDave Kleikamp 4194dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4195ac27a0ecSDave Kleikamp start, len, blocksize); 4196ac27a0ecSDave Kleikamp if (!journal) { 4197b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4198ac27a0ecSDave Kleikamp goto out_bdev; 4199ac27a0ecSDave Kleikamp } 4200ac27a0ecSDave Kleikamp journal->j_private = sb; 4201ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 4202ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4203ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4204b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4205ac27a0ecSDave Kleikamp goto out_journal; 4206ac27a0ecSDave Kleikamp } 4207ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4208b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4209b31e1552SEric Sandeen "user (unsupported) - %d", 4210ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4211ac27a0ecSDave Kleikamp goto out_journal; 4212ac27a0ecSDave Kleikamp } 4213617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4214617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4215ac27a0ecSDave Kleikamp return journal; 42160b8e58a1SAndreas Dilger 4217ac27a0ecSDave Kleikamp out_journal: 4218dab291afSMingming Cao jbd2_journal_destroy(journal); 4219ac27a0ecSDave Kleikamp out_bdev: 4220617ba13bSMingming Cao ext4_blkdev_put(bdev); 4221ac27a0ecSDave Kleikamp return NULL; 4222ac27a0ecSDave Kleikamp } 4223ac27a0ecSDave Kleikamp 4224617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4225617ba13bSMingming Cao struct ext4_super_block *es, 4226ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4227ac27a0ecSDave Kleikamp { 4228ac27a0ecSDave Kleikamp journal_t *journal; 4229ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4230ac27a0ecSDave Kleikamp dev_t journal_dev; 4231ac27a0ecSDave Kleikamp int err = 0; 4232ac27a0ecSDave Kleikamp int really_read_only; 4233ac27a0ecSDave Kleikamp 42340390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 42350390131bSFrank Mayhar 4236ac27a0ecSDave Kleikamp if (journal_devnum && 4237ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4238b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4239b31e1552SEric Sandeen "numbers have changed"); 4240ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4241ac27a0ecSDave Kleikamp } else 4242ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4243ac27a0ecSDave Kleikamp 4244ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4245ac27a0ecSDave Kleikamp 4246ac27a0ecSDave Kleikamp /* 4247ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4248ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4249ac27a0ecSDave Kleikamp * can get read-write access to the device. 4250ac27a0ecSDave Kleikamp */ 4251617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 4252ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4253b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4254b31e1552SEric Sandeen "required on readonly filesystem"); 4255ac27a0ecSDave Kleikamp if (really_read_only) { 4256b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4257b31e1552SEric Sandeen "unavailable, cannot proceed"); 4258ac27a0ecSDave Kleikamp return -EROFS; 4259ac27a0ecSDave Kleikamp } 4260b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4261b31e1552SEric Sandeen "be enabled during recovery"); 4262ac27a0ecSDave Kleikamp } 4263ac27a0ecSDave Kleikamp } 4264ac27a0ecSDave Kleikamp 4265ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4266b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4267b31e1552SEric Sandeen "and inode journals!"); 4268ac27a0ecSDave Kleikamp return -EINVAL; 4269ac27a0ecSDave Kleikamp } 4270ac27a0ecSDave Kleikamp 4271ac27a0ecSDave Kleikamp if (journal_inum) { 4272617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4273ac27a0ecSDave Kleikamp return -EINVAL; 4274ac27a0ecSDave Kleikamp } else { 4275617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4276ac27a0ecSDave Kleikamp return -EINVAL; 4277ac27a0ecSDave Kleikamp } 4278ac27a0ecSDave Kleikamp 427990576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4280b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 42814776004fSTheodore Ts'o 4282617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 4283dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 42841c13d5c0STheodore Ts'o if (!err) { 42851c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 42861c13d5c0STheodore Ts'o if (save) 42871c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 42881c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4289dab291afSMingming Cao err = jbd2_journal_load(journal); 42901c13d5c0STheodore Ts'o if (save) 42911c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 42921c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 42931c13d5c0STheodore Ts'o kfree(save); 42941c13d5c0STheodore Ts'o } 4295ac27a0ecSDave Kleikamp 4296ac27a0ecSDave Kleikamp if (err) { 4297b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4298dab291afSMingming Cao jbd2_journal_destroy(journal); 4299ac27a0ecSDave Kleikamp return err; 4300ac27a0ecSDave Kleikamp } 4301ac27a0ecSDave Kleikamp 4302617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4303617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4304ac27a0ecSDave Kleikamp 4305c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4306ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4307ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4308ac27a0ecSDave Kleikamp 4309ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4310e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4311ac27a0ecSDave Kleikamp } 4312ac27a0ecSDave Kleikamp 4313ac27a0ecSDave Kleikamp return 0; 4314ac27a0ecSDave Kleikamp } 4315ac27a0ecSDave Kleikamp 4316e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4317ac27a0ecSDave Kleikamp { 4318e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4319617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4320c4be0c1dSTakashi Sato int error = 0; 4321ac27a0ecSDave Kleikamp 43227c2e7087STheodore Ts'o if (!sbh || block_device_ejected(sb)) 4323c4be0c1dSTakashi Sato return error; 4324914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 4325914258bfSTheodore Ts'o /* 4326914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 4327914258bfSTheodore Ts'o * superblock failed. This could happen because the 4328914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 4329914258bfSTheodore Ts'o * be a transient write error and maybe the block will 4330914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 4331914258bfSTheodore Ts'o * write and hope for the best. 4332914258bfSTheodore Ts'o */ 4333b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 4334b31e1552SEric Sandeen "superblock detected"); 4335914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4336914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4337914258bfSTheodore Ts'o } 433871290b36STheodore Ts'o /* 433971290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 434071290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 434171290b36STheodore Ts'o * write time when we are mounting the root file system 434271290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 434371290b36STheodore Ts'o * for people who are east of GMT and who make their clock 434471290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 434571290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 434671290b36STheodore Ts'o * to complain and force a full file system check. 434771290b36STheodore Ts'o */ 434871290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4349ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4350f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4351afc32f7eSTheodore Ts'o es->s_kbytes_written = 4352afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4353afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4354afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4355f613dfcbSTheodore Ts'o else 4356f613dfcbSTheodore Ts'o es->s_kbytes_written = 4357f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 435857042651STheodore Ts'o ext4_free_blocks_count_set(es, 435957042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 436057042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 43617f93cff9STheodore Ts'o es->s_free_inodes_count = 43627f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 43635d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4364ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 4365a9c47317SDarrick J. Wong ext4_superblock_csum_set(sb, es); 4366ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4367914258bfSTheodore Ts'o if (sync) { 4368c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4369c4be0c1dSTakashi Sato if (error) 4370c4be0c1dSTakashi Sato return error; 4371c4be0c1dSTakashi Sato 4372c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4373c4be0c1dSTakashi Sato if (error) { 4374b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4375b31e1552SEric Sandeen "superblock"); 4376914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4377914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4378914258bfSTheodore Ts'o } 4379914258bfSTheodore Ts'o } 4380c4be0c1dSTakashi Sato return error; 4381ac27a0ecSDave Kleikamp } 4382ac27a0ecSDave Kleikamp 4383ac27a0ecSDave Kleikamp /* 4384ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4385ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4386ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4387ac27a0ecSDave Kleikamp */ 4388617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4389617ba13bSMingming Cao struct ext4_super_block *es) 4390ac27a0ecSDave Kleikamp { 4391617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4392ac27a0ecSDave Kleikamp 43930390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 43940390131bSFrank Mayhar BUG_ON(journal != NULL); 43950390131bSFrank Mayhar return; 43960390131bSFrank Mayhar } 4397dab291afSMingming Cao jbd2_journal_lock_updates(journal); 43987ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 43997ffe1ea8SHidehiro Kawai goto out; 44007ffe1ea8SHidehiro Kawai 4401617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4402ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4403617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4404e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4405ac27a0ecSDave Kleikamp } 44067ffe1ea8SHidehiro Kawai 44077ffe1ea8SHidehiro Kawai out: 4408dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4409ac27a0ecSDave Kleikamp } 4410ac27a0ecSDave Kleikamp 4411ac27a0ecSDave Kleikamp /* 4412ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4413ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4414ac27a0ecSDave Kleikamp * main filesystem now. 4415ac27a0ecSDave Kleikamp */ 4416617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4417617ba13bSMingming Cao struct ext4_super_block *es) 4418ac27a0ecSDave Kleikamp { 4419ac27a0ecSDave Kleikamp journal_t *journal; 4420ac27a0ecSDave Kleikamp int j_errno; 4421ac27a0ecSDave Kleikamp const char *errstr; 4422ac27a0ecSDave Kleikamp 44230390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 44240390131bSFrank Mayhar 4425617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4426ac27a0ecSDave Kleikamp 4427ac27a0ecSDave Kleikamp /* 4428ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4429617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4430ac27a0ecSDave Kleikamp */ 4431ac27a0ecSDave Kleikamp 4432dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4433ac27a0ecSDave Kleikamp if (j_errno) { 4434ac27a0ecSDave Kleikamp char nbuf[16]; 4435ac27a0ecSDave Kleikamp 4436617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 443712062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4438ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 443912062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4440ac27a0ecSDave Kleikamp 4441617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4442617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4443e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4444ac27a0ecSDave Kleikamp 4445dab291afSMingming Cao jbd2_journal_clear_err(journal); 4446d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4447ac27a0ecSDave Kleikamp } 4448ac27a0ecSDave Kleikamp } 4449ac27a0ecSDave Kleikamp 4450ac27a0ecSDave Kleikamp /* 4451ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4452ac27a0ecSDave Kleikamp * and wait on the commit. 4453ac27a0ecSDave Kleikamp */ 4454617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4455ac27a0ecSDave Kleikamp { 4456ac27a0ecSDave Kleikamp journal_t *journal; 44570390131bSFrank Mayhar int ret = 0; 4458ac27a0ecSDave Kleikamp 4459ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4460ac27a0ecSDave Kleikamp return 0; 4461ac27a0ecSDave Kleikamp 4462617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 44638e8ad8a5SJan Kara if (journal) 4464617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 44650390131bSFrank Mayhar 4466ac27a0ecSDave Kleikamp return ret; 4467ac27a0ecSDave Kleikamp } 4468ac27a0ecSDave Kleikamp 4469617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4470ac27a0ecSDave Kleikamp { 447114ce0cb4STheodore Ts'o int ret = 0; 44729eddacf9SJan Kara tid_t target; 44738d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4474ac27a0ecSDave Kleikamp 44759bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 44768d5d02e6SMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 4477a1177825SJan Kara /* 4478a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4479a1177825SJan Kara * no dirty dquots 4480a1177825SJan Kara */ 4481a1177825SJan Kara dquot_writeback_dquots(sb, -1); 44828d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4483ac27a0ecSDave Kleikamp if (wait) 44848d5d02e6SMingming Cao jbd2_log_wait_commit(sbi->s_journal, target); 44850390131bSFrank Mayhar } 448614ce0cb4STheodore Ts'o return ret; 4487ac27a0ecSDave Kleikamp } 4488ac27a0ecSDave Kleikamp 4489ac27a0ecSDave Kleikamp /* 4490ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4491ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4492be4f27d3SYongqiang Yang * 4493be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 44948e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 44958e8ad8a5SJan Kara * modifications. 4496ac27a0ecSDave Kleikamp */ 4497c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4498ac27a0ecSDave Kleikamp { 4499c4be0c1dSTakashi Sato int error = 0; 4500c4be0c1dSTakashi Sato journal_t *journal; 4501ac27a0ecSDave Kleikamp 45029ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 45039ca92389STheodore Ts'o return 0; 45049ca92389STheodore Ts'o 4505c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4506ac27a0ecSDave Kleikamp 4507ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4508dab291afSMingming Cao jbd2_journal_lock_updates(journal); 45097ffe1ea8SHidehiro Kawai 45107ffe1ea8SHidehiro Kawai /* 45119ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 45129ca92389STheodore Ts'o * the journal. 45137ffe1ea8SHidehiro Kawai */ 4514c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 45156b0310fbSEric Sandeen if (error < 0) 45166b0310fbSEric Sandeen goto out; 4517ac27a0ecSDave Kleikamp 4518ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4519617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4520e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 45216b0310fbSEric Sandeen out: 45228e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 45236b0310fbSEric Sandeen jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 45246b0310fbSEric Sandeen return error; 4525ac27a0ecSDave Kleikamp } 4526ac27a0ecSDave Kleikamp 4527ac27a0ecSDave Kleikamp /* 4528ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4529ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4530ac27a0ecSDave Kleikamp */ 4531c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4532ac27a0ecSDave Kleikamp { 45339ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 45349ca92389STheodore Ts'o return 0; 45359ca92389STheodore Ts'o 45369ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4537617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4538e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4539c4be0c1dSTakashi Sato return 0; 4540ac27a0ecSDave Kleikamp } 4541ac27a0ecSDave Kleikamp 4542673c6100STheodore Ts'o /* 4543673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4544673c6100STheodore Ts'o */ 4545673c6100STheodore Ts'o struct ext4_mount_options { 4546673c6100STheodore Ts'o unsigned long s_mount_opt; 4547a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 454808cefc7aSEric W. Biederman kuid_t s_resuid; 454908cefc7aSEric W. Biederman kgid_t s_resgid; 4550673c6100STheodore Ts'o unsigned long s_commit_interval; 4551673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4552673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4553673c6100STheodore Ts'o int s_jquota_fmt; 4554673c6100STheodore Ts'o char *s_qf_names[MAXQUOTAS]; 4555673c6100STheodore Ts'o #endif 4556673c6100STheodore Ts'o }; 4557673c6100STheodore Ts'o 4558617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4559ac27a0ecSDave Kleikamp { 4560617ba13bSMingming Cao struct ext4_super_block *es; 4561617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4562ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4563617ba13bSMingming Cao struct ext4_mount_options old_opts; 4564c79d967dSChristoph Hellwig int enable_quota = 0; 45658a266467STheodore Ts'o ext4_group_t g; 4566b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4567c5e06d10SJohann Lombardi int err = 0; 4568ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4569ac27a0ecSDave Kleikamp int i; 4570ac27a0ecSDave Kleikamp #endif 4571d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4572ac27a0ecSDave Kleikamp 4573ac27a0ecSDave Kleikamp /* Store the original options */ 4574ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4575ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4576a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4577ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4578ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4579ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 458030773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 458130773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4582ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4583ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4584ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4585ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 4586ac27a0ecSDave Kleikamp #endif 4587b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4588b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4589ac27a0ecSDave Kleikamp 4590ac27a0ecSDave Kleikamp /* 4591ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 4592ac27a0ecSDave Kleikamp */ 4593661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4594ac27a0ecSDave Kleikamp err = -EINVAL; 4595ac27a0ecSDave Kleikamp goto restore_opts; 4596ac27a0ecSDave Kleikamp } 4597ac27a0ecSDave Kleikamp 45984ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4599c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4600ac27a0ecSDave Kleikamp 4601ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4602482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4603ac27a0ecSDave Kleikamp 4604ac27a0ecSDave Kleikamp es = sbi->s_es; 4605ac27a0ecSDave Kleikamp 4606b3881f74STheodore Ts'o if (sbi->s_journal) { 4607617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4608b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4609b3881f74STheodore Ts'o } 4610ac27a0ecSDave Kleikamp 4611661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 46124ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4613ac27a0ecSDave Kleikamp err = -EROFS; 4614ac27a0ecSDave Kleikamp goto restore_opts; 4615ac27a0ecSDave Kleikamp } 4616ac27a0ecSDave Kleikamp 4617ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 46180f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 46190f0dd62fSChristoph Hellwig if (err < 0) 4620c79d967dSChristoph Hellwig goto restore_opts; 4621c79d967dSChristoph Hellwig 4622ac27a0ecSDave Kleikamp /* 4623ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4624ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4625ac27a0ecSDave Kleikamp */ 4626ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4627ac27a0ecSDave Kleikamp 4628ac27a0ecSDave Kleikamp /* 4629ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4630ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4631ac27a0ecSDave Kleikamp * mark the partition as valid again. 4632ac27a0ecSDave Kleikamp */ 4633617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4634617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4635ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4636ac27a0ecSDave Kleikamp 4637a63c9eb2STheodore Ts'o if (sbi->s_journal) 4638617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4639ac27a0ecSDave Kleikamp } else { 4640a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4641a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 4642ac27a0ecSDave Kleikamp err = -EROFS; 4643ac27a0ecSDave Kleikamp goto restore_opts; 4644ac27a0ecSDave Kleikamp } 4645ead6596bSEric Sandeen /* 46468a266467STheodore Ts'o * Make sure the group descriptor checksums 46470b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 46488a266467STheodore Ts'o */ 46498a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 46508a266467STheodore Ts'o struct ext4_group_desc *gdp = 46518a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 46528a266467STheodore Ts'o 4653feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 4654b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4655b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 46568a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 46578a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 46588a266467STheodore Ts'o err = -EINVAL; 46598a266467STheodore Ts'o goto restore_opts; 46608a266467STheodore Ts'o } 46618a266467STheodore Ts'o } 46628a266467STheodore Ts'o 46638a266467STheodore Ts'o /* 4664ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4665ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4666ead6596bSEric Sandeen * require a full umount/remount for now. 4667ead6596bSEric Sandeen */ 4668ead6596bSEric Sandeen if (es->s_last_orphan) { 4669b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4670ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4671ead6596bSEric Sandeen "orphan inode list. Please " 4672b31e1552SEric Sandeen "umount/remount instead"); 4673ead6596bSEric Sandeen err = -EINVAL; 4674ead6596bSEric Sandeen goto restore_opts; 4675ead6596bSEric Sandeen } 4676ead6596bSEric Sandeen 4677ac27a0ecSDave Kleikamp /* 4678ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4679ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4680ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4681ac27a0ecSDave Kleikamp * the partition.) 4682ac27a0ecSDave Kleikamp */ 46830390131bSFrank Mayhar if (sbi->s_journal) 4684617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4685ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4686617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4687ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4688c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, 4689c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_MMP)) 4690c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 4691c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 4692c5e06d10SJohann Lombardi err = -EROFS; 4693c5e06d10SJohann Lombardi goto restore_opts; 4694c5e06d10SJohann Lombardi } 4695c79d967dSChristoph Hellwig enable_quota = 1; 4696ac27a0ecSDave Kleikamp } 4697ac27a0ecSDave Kleikamp } 4698bfff6873SLukas Czerner 4699bfff6873SLukas Czerner /* 4700bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4701bfff6873SLukas Czerner * current settings 4702bfff6873SLukas Czerner */ 4703bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4704bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4705bfff6873SLukas Czerner else { 4706bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4707bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4708bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4709bfff6873SLukas Czerner } 4710bfff6873SLukas Czerner 47116fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 47120390131bSFrank Mayhar if (sbi->s_journal == NULL) 4713e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 47140390131bSFrank Mayhar 4715ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4716ac27a0ecSDave Kleikamp /* Release old quota file names */ 4717ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4718ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 4719ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4720ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 47217c319d32SAditya Kali if (enable_quota) { 47227c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 47230f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 47247c319d32SAditya Kali else if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 47257c319d32SAditya Kali EXT4_FEATURE_RO_COMPAT_QUOTA)) { 47267c319d32SAditya Kali err = ext4_enable_quotas(sb); 4727*07724f98STheodore Ts'o if (err) 47287c319d32SAditya Kali goto restore_opts; 47297c319d32SAditya Kali } 47307c319d32SAditya Kali } 47317c319d32SAditya Kali #endif 4732d4c402d9SCurt Wohlgemuth 4733d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 4734d4c402d9SCurt Wohlgemuth kfree(orig_data); 4735ac27a0ecSDave Kleikamp return 0; 47360b8e58a1SAndreas Dilger 4737ac27a0ecSDave Kleikamp restore_opts: 4738ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 4739ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 4740a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 4741ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 4742ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 4743ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 474430773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 474530773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 4746ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4747ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 4748ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 4749ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 4750ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4751ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4752ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 4753ac27a0ecSDave Kleikamp } 4754ac27a0ecSDave Kleikamp #endif 4755d4c402d9SCurt Wohlgemuth kfree(orig_data); 4756ac27a0ecSDave Kleikamp return err; 4757ac27a0ecSDave Kleikamp } 4758ac27a0ecSDave Kleikamp 4759617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 4760ac27a0ecSDave Kleikamp { 4761ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 4762617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4763617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 4764952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 4765960cc398SPekka Enberg u64 fsid; 4766d02a9391SKazuya Mio s64 bfree; 4767ac27a0ecSDave Kleikamp 4768952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 4769952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 4770ac27a0ecSDave Kleikamp 4771617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 4772ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 4773952fc18eSTheodore Ts'o buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, sbi->s_overhead); 477457042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 477557042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 4776d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 477757042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 4778bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 4779bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 4780ac27a0ecSDave Kleikamp buf->f_bavail = 0; 4781ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 478252d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 4783617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 4784960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 4785960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 4786960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 4787960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 47880b8e58a1SAndreas Dilger 4789ac27a0ecSDave Kleikamp return 0; 4790ac27a0ecSDave Kleikamp } 4791ac27a0ecSDave Kleikamp 47920b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 47930b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 4794ac27a0ecSDave Kleikamp * Process 1 Process 2 4795617ba13bSMingming Cao * ext4_create() quota_sync() 4796dab291afSMingming Cao * jbd2_journal_start() write_dquot() 4797871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 4798dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 4799ac27a0ecSDave Kleikamp * 4800ac27a0ecSDave Kleikamp */ 4801ac27a0ecSDave Kleikamp 4802ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4803ac27a0ecSDave Kleikamp 4804ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 4805ac27a0ecSDave Kleikamp { 4806ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 4807ac27a0ecSDave Kleikamp } 4808ac27a0ecSDave Kleikamp 4809617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 4810ac27a0ecSDave Kleikamp { 4811ac27a0ecSDave Kleikamp int ret, err; 4812ac27a0ecSDave Kleikamp handle_t *handle; 4813ac27a0ecSDave Kleikamp struct inode *inode; 4814ac27a0ecSDave Kleikamp 4815ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 4816617ba13bSMingming Cao handle = ext4_journal_start(inode, 4817617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 4818ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4819ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4820ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 4821617ba13bSMingming Cao err = ext4_journal_stop(handle); 4822ac27a0ecSDave Kleikamp if (!ret) 4823ac27a0ecSDave Kleikamp ret = err; 4824ac27a0ecSDave Kleikamp return ret; 4825ac27a0ecSDave Kleikamp } 4826ac27a0ecSDave Kleikamp 4827617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 4828ac27a0ecSDave Kleikamp { 4829ac27a0ecSDave Kleikamp int ret, err; 4830ac27a0ecSDave Kleikamp handle_t *handle; 4831ac27a0ecSDave Kleikamp 4832617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4833617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 4834ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4835ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4836ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 4837617ba13bSMingming Cao err = ext4_journal_stop(handle); 4838ac27a0ecSDave Kleikamp if (!ret) 4839ac27a0ecSDave Kleikamp ret = err; 4840ac27a0ecSDave Kleikamp return ret; 4841ac27a0ecSDave Kleikamp } 4842ac27a0ecSDave Kleikamp 4843617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 4844ac27a0ecSDave Kleikamp { 4845ac27a0ecSDave Kleikamp int ret, err; 4846ac27a0ecSDave Kleikamp handle_t *handle; 4847ac27a0ecSDave Kleikamp 4848617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4849617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 48509c3013e9SJan Kara if (IS_ERR(handle)) { 48519c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 48529c3013e9SJan Kara dquot_release(dquot); 4853ac27a0ecSDave Kleikamp return PTR_ERR(handle); 48549c3013e9SJan Kara } 4855ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 4856617ba13bSMingming Cao err = ext4_journal_stop(handle); 4857ac27a0ecSDave Kleikamp if (!ret) 4858ac27a0ecSDave Kleikamp ret = err; 4859ac27a0ecSDave Kleikamp return ret; 4860ac27a0ecSDave Kleikamp } 4861ac27a0ecSDave Kleikamp 4862617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 4863ac27a0ecSDave Kleikamp { 48642c8be6b2SJan Kara /* Are we journaling quotas? */ 4865617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 4866617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 4867ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 4868617ba13bSMingming Cao return ext4_write_dquot(dquot); 4869ac27a0ecSDave Kleikamp } else { 4870ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 4871ac27a0ecSDave Kleikamp } 4872ac27a0ecSDave Kleikamp } 4873ac27a0ecSDave Kleikamp 4874617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 4875ac27a0ecSDave Kleikamp { 4876ac27a0ecSDave Kleikamp int ret, err; 4877ac27a0ecSDave Kleikamp handle_t *handle; 4878ac27a0ecSDave Kleikamp 4879ac27a0ecSDave Kleikamp /* Data block + inode block */ 4880617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 4881ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4882ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4883ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 4884617ba13bSMingming Cao err = ext4_journal_stop(handle); 4885ac27a0ecSDave Kleikamp if (!ret) 4886ac27a0ecSDave Kleikamp ret = err; 4887ac27a0ecSDave Kleikamp return ret; 4888ac27a0ecSDave Kleikamp } 4889ac27a0ecSDave Kleikamp 4890ac27a0ecSDave Kleikamp /* 4891ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 4892ac27a0ecSDave Kleikamp * the quota file and such... 4893ac27a0ecSDave Kleikamp */ 4894617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 4895ac27a0ecSDave Kleikamp { 4896287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 4897617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 4898ac27a0ecSDave Kleikamp } 4899ac27a0ecSDave Kleikamp 4900ac27a0ecSDave Kleikamp /* 4901ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 4902ac27a0ecSDave Kleikamp */ 4903617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 4904f00c9e44SJan Kara struct path *path) 4905ac27a0ecSDave Kleikamp { 4906ac27a0ecSDave Kleikamp int err; 4907ac27a0ecSDave Kleikamp 4908ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 4909ac27a0ecSDave Kleikamp return -EINVAL; 49100623543bSJan Kara 4911ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 4912d8c9584eSAl Viro if (path->dentry->d_sb != sb) 4913ac27a0ecSDave Kleikamp return -EXDEV; 49140623543bSJan Kara /* Journaling quota? */ 49150623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 49162b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 4917f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 4918b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4919b31e1552SEric Sandeen "Quota file not on filesystem root. " 4920b31e1552SEric Sandeen "Journaled quota will not work"); 49210623543bSJan Kara } 49220623543bSJan Kara 49230623543bSJan Kara /* 49240623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 49250623543bSJan Kara * all updates to the file when we bypass pagecache... 49260623543bSJan Kara */ 49270390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 4928f00c9e44SJan Kara ext4_should_journal_data(path->dentry->d_inode)) { 49290623543bSJan Kara /* 49300623543bSJan Kara * We don't need to lock updates but journal_flush() could 49310623543bSJan Kara * otherwise be livelocked... 49320623543bSJan Kara */ 49330623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 49347ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 49350623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 4936f00c9e44SJan Kara if (err) 49377ffe1ea8SHidehiro Kawai return err; 49387ffe1ea8SHidehiro Kawai } 49390623543bSJan Kara 4940f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 4941ac27a0ecSDave Kleikamp } 4942ac27a0ecSDave Kleikamp 49437c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 49447c319d32SAditya Kali unsigned int flags) 49457c319d32SAditya Kali { 49467c319d32SAditya Kali int err; 49477c319d32SAditya Kali struct inode *qf_inode; 49487c319d32SAditya Kali unsigned long qf_inums[MAXQUOTAS] = { 49497c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 49507c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 49517c319d32SAditya Kali }; 49527c319d32SAditya Kali 49537c319d32SAditya Kali BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)); 49547c319d32SAditya Kali 49557c319d32SAditya Kali if (!qf_inums[type]) 49567c319d32SAditya Kali return -EPERM; 49577c319d32SAditya Kali 49587c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 49597c319d32SAditya Kali if (IS_ERR(qf_inode)) { 49607c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 49617c319d32SAditya Kali return PTR_ERR(qf_inode); 49627c319d32SAditya Kali } 49637c319d32SAditya Kali 49647c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 49657c319d32SAditya Kali iput(qf_inode); 49667c319d32SAditya Kali 49677c319d32SAditya Kali return err; 49687c319d32SAditya Kali } 49697c319d32SAditya Kali 49707c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 49717c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 49727c319d32SAditya Kali { 49737c319d32SAditya Kali int type, err = 0; 49747c319d32SAditya Kali unsigned long qf_inums[MAXQUOTAS] = { 49757c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 49767c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 49777c319d32SAditya Kali }; 49787c319d32SAditya Kali 49797c319d32SAditya Kali sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; 49807c319d32SAditya Kali for (type = 0; type < MAXQUOTAS; type++) { 49817c319d32SAditya Kali if (qf_inums[type]) { 49827c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 49837c319d32SAditya Kali DQUOT_USAGE_ENABLED); 49847c319d32SAditya Kali if (err) { 49857c319d32SAditya Kali ext4_warning(sb, 49867c319d32SAditya Kali "Failed to enable quota (type=%d) " 49877c319d32SAditya Kali "tracking. Please run e2fsck to fix.", 49887c319d32SAditya Kali type); 49897c319d32SAditya Kali return err; 49907c319d32SAditya Kali } 49917c319d32SAditya Kali } 49927c319d32SAditya Kali } 49937c319d32SAditya Kali return 0; 49947c319d32SAditya Kali } 49957c319d32SAditya Kali 49967c319d32SAditya Kali /* 49977c319d32SAditya Kali * quota_on function that is used when QUOTA feature is set. 49987c319d32SAditya Kali */ 49997c319d32SAditya Kali static int ext4_quota_on_sysfile(struct super_block *sb, int type, 50007c319d32SAditya Kali int format_id) 50017c319d32SAditya Kali { 50027c319d32SAditya Kali if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 50037c319d32SAditya Kali return -EINVAL; 50047c319d32SAditya Kali 50057c319d32SAditya Kali /* 50067c319d32SAditya Kali * USAGE was enabled at mount time. Only need to enable LIMITS now. 50077c319d32SAditya Kali */ 50087c319d32SAditya Kali return ext4_quota_enable(sb, type, format_id, DQUOT_LIMITS_ENABLED); 50097c319d32SAditya Kali } 50107c319d32SAditya Kali 5011ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5012ca0e05e4SDmitry Monakhov { 501321f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 501421f97697SJan Kara handle_t *handle; 501521f97697SJan Kara 501687009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 501787009d86SDmitry Monakhov * Caller already holds s_umount sem */ 501887009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5019ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5020ca0e05e4SDmitry Monakhov 50210b268590SAmir Goldstein if (!inode) 50220b268590SAmir Goldstein goto out; 50230b268590SAmir Goldstein 502421f97697SJan Kara /* Update modification times of quota files when userspace can 502521f97697SJan Kara * start looking at them */ 502621f97697SJan Kara handle = ext4_journal_start(inode, 1); 502721f97697SJan Kara if (IS_ERR(handle)) 502821f97697SJan Kara goto out; 502921f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 503021f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 503121f97697SJan Kara ext4_journal_stop(handle); 503221f97697SJan Kara 503321f97697SJan Kara out: 5034ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5035ca0e05e4SDmitry Monakhov } 5036ca0e05e4SDmitry Monakhov 50377c319d32SAditya Kali /* 50387c319d32SAditya Kali * quota_off function that is used when QUOTA feature is set. 50397c319d32SAditya Kali */ 50407c319d32SAditya Kali static int ext4_quota_off_sysfile(struct super_block *sb, int type) 50417c319d32SAditya Kali { 50427c319d32SAditya Kali if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 50437c319d32SAditya Kali return -EINVAL; 50447c319d32SAditya Kali 50457c319d32SAditya Kali /* Disable only the limits. */ 50467c319d32SAditya Kali return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); 50477c319d32SAditya Kali } 50487c319d32SAditya Kali 5049ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5050ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5051ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5052ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5053617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5054ac27a0ecSDave Kleikamp size_t len, loff_t off) 5055ac27a0ecSDave Kleikamp { 5056ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5057725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5058ac27a0ecSDave Kleikamp int err = 0; 5059ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5060ac27a0ecSDave Kleikamp int tocopy; 5061ac27a0ecSDave Kleikamp size_t toread; 5062ac27a0ecSDave Kleikamp struct buffer_head *bh; 5063ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5064ac27a0ecSDave Kleikamp 5065ac27a0ecSDave Kleikamp if (off > i_size) 5066ac27a0ecSDave Kleikamp return 0; 5067ac27a0ecSDave Kleikamp if (off+len > i_size) 5068ac27a0ecSDave Kleikamp len = i_size-off; 5069ac27a0ecSDave Kleikamp toread = len; 5070ac27a0ecSDave Kleikamp while (toread > 0) { 5071ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5072ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 5073617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 5074ac27a0ecSDave Kleikamp if (err) 5075ac27a0ecSDave Kleikamp return err; 5076ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5077ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5078ac27a0ecSDave Kleikamp else 5079ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5080ac27a0ecSDave Kleikamp brelse(bh); 5081ac27a0ecSDave Kleikamp offset = 0; 5082ac27a0ecSDave Kleikamp toread -= tocopy; 5083ac27a0ecSDave Kleikamp data += tocopy; 5084ac27a0ecSDave Kleikamp blk++; 5085ac27a0ecSDave Kleikamp } 5086ac27a0ecSDave Kleikamp return len; 5087ac27a0ecSDave Kleikamp } 5088ac27a0ecSDave Kleikamp 5089ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5090ac27a0ecSDave Kleikamp * enough credits) */ 5091617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5092ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5093ac27a0ecSDave Kleikamp { 5094ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5095725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5096ac27a0ecSDave Kleikamp int err = 0; 5097ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5098ac27a0ecSDave Kleikamp struct buffer_head *bh; 5099ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5100ac27a0ecSDave Kleikamp 51010390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5102b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5103b31e1552SEric Sandeen " cancelled because transaction is not started", 51049c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 51059c3013e9SJan Kara return -EIO; 51069c3013e9SJan Kara } 510767eeb568SDmitry Monakhov /* 510867eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 510967eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 511067eeb568SDmitry Monakhov */ 511167eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 511267eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 511367eeb568SDmitry Monakhov " cancelled because not block aligned", 511467eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 511567eeb568SDmitry Monakhov return -EIO; 511667eeb568SDmitry Monakhov } 511767eeb568SDmitry Monakhov 5118617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 5119ac27a0ecSDave Kleikamp if (!bh) 5120ac27a0ecSDave Kleikamp goto out; 5121617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5122ac27a0ecSDave Kleikamp if (err) { 5123ac27a0ecSDave Kleikamp brelse(bh); 5124ac27a0ecSDave Kleikamp goto out; 5125ac27a0ecSDave Kleikamp } 5126ac27a0ecSDave Kleikamp lock_buffer(bh); 512767eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5128ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5129ac27a0ecSDave Kleikamp unlock_buffer(bh); 51300390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5131ac27a0ecSDave Kleikamp brelse(bh); 5132ac27a0ecSDave Kleikamp out: 51330b7f7cefSJan Kara if (err) 5134ac27a0ecSDave Kleikamp return err; 513567eeb568SDmitry Monakhov if (inode->i_size < off + len) { 513667eeb568SDmitry Monakhov i_size_write(inode, off + len); 5137617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5138617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 513921f97697SJan Kara } 514067eeb568SDmitry Monakhov return len; 5141ac27a0ecSDave Kleikamp } 5142ac27a0ecSDave Kleikamp 5143ac27a0ecSDave Kleikamp #endif 5144ac27a0ecSDave Kleikamp 5145152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5146152a0836SAl Viro const char *dev_name, void *data) 5147ac27a0ecSDave Kleikamp { 5148152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5149ac27a0ecSDave Kleikamp } 5150ac27a0ecSDave Kleikamp 515137f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 515224b58424STheodore Ts'o static inline void register_as_ext2(void) 515324b58424STheodore Ts'o { 515424b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 515524b58424STheodore Ts'o if (err) 515624b58424STheodore Ts'o printk(KERN_WARNING 515724b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 515824b58424STheodore Ts'o } 515924b58424STheodore Ts'o 516024b58424STheodore Ts'o static inline void unregister_as_ext2(void) 516124b58424STheodore Ts'o { 516224b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 516324b58424STheodore Ts'o } 51642035e776STheodore Ts'o 51652035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 51662035e776STheodore Ts'o { 51672035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) 51682035e776STheodore Ts'o return 0; 51692035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 51702035e776STheodore Ts'o return 1; 51712035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) 51722035e776STheodore Ts'o return 0; 51732035e776STheodore Ts'o return 1; 51742035e776STheodore Ts'o } 517551b7e3c9STheodore Ts'o MODULE_ALIAS("ext2"); 517624b58424STheodore Ts'o #else 517724b58424STheodore Ts'o static inline void register_as_ext2(void) { } 517824b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 51792035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 518024b58424STheodore Ts'o #endif 518124b58424STheodore Ts'o 518237f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 518324b58424STheodore Ts'o static inline void register_as_ext3(void) 518424b58424STheodore Ts'o { 518524b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 518624b58424STheodore Ts'o if (err) 518724b58424STheodore Ts'o printk(KERN_WARNING 518824b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 518924b58424STheodore Ts'o } 519024b58424STheodore Ts'o 519124b58424STheodore Ts'o static inline void unregister_as_ext3(void) 519224b58424STheodore Ts'o { 519324b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 519424b58424STheodore Ts'o } 51952035e776STheodore Ts'o 51962035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 51972035e776STheodore Ts'o { 51982035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) 51992035e776STheodore Ts'o return 0; 52002035e776STheodore Ts'o if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 52012035e776STheodore Ts'o return 0; 52022035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 52032035e776STheodore Ts'o return 1; 52042035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) 52052035e776STheodore Ts'o return 0; 52062035e776STheodore Ts'o return 1; 52072035e776STheodore Ts'o } 520851b7e3c9STheodore Ts'o MODULE_ALIAS("ext3"); 520924b58424STheodore Ts'o #else 521024b58424STheodore Ts'o static inline void register_as_ext3(void) { } 521124b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 52122035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } 521324b58424STheodore Ts'o #endif 521424b58424STheodore Ts'o 521503010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5216ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 521703010a33STheodore Ts'o .name = "ext4", 5218152a0836SAl Viro .mount = ext4_mount, 5219ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5220ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5221ac27a0ecSDave Kleikamp }; 5222ac27a0ecSDave Kleikamp 52238f021222SLukas Czerner static int __init ext4_init_feat_adverts(void) 5224857ac889SLukas Czerner { 5225857ac889SLukas Czerner struct ext4_features *ef; 5226857ac889SLukas Czerner int ret = -ENOMEM; 5227857ac889SLukas Czerner 5228857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 5229857ac889SLukas Czerner if (!ef) 5230857ac889SLukas Czerner goto out; 5231857ac889SLukas Czerner 5232857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 5233857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 5234857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 5235857ac889SLukas Czerner "features"); 5236857ac889SLukas Czerner if (ret) { 5237857ac889SLukas Czerner kfree(ef); 5238857ac889SLukas Czerner goto out; 5239857ac889SLukas Czerner } 5240857ac889SLukas Czerner 5241857ac889SLukas Czerner ext4_feat = ef; 5242857ac889SLukas Czerner ret = 0; 5243857ac889SLukas Czerner out: 5244857ac889SLukas Czerner return ret; 5245857ac889SLukas Czerner } 5246857ac889SLukas Czerner 52478f021222SLukas Czerner static void ext4_exit_feat_adverts(void) 52488f021222SLukas Czerner { 52498f021222SLukas Czerner kobject_put(&ext4_feat->f_kobj); 52508f021222SLukas Czerner wait_for_completion(&ext4_feat->f_kobj_unregister); 52518f021222SLukas Czerner kfree(ext4_feat); 52528f021222SLukas Czerner } 52538f021222SLukas Czerner 5254e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5255e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5256e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 5257e9e3bcecSEric Sandeen 52585dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5259ac27a0ecSDave Kleikamp { 5260e9e3bcecSEric Sandeen int i, err; 5261c9de560dSAlex Tomas 526207c0c5d8SAl Viro ext4_li_info = NULL; 526307c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 526407c0c5d8SAl Viro 526512e9b892SDmitry Monakhov ext4_check_flag_values(); 5266e9e3bcecSEric Sandeen 5267e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 5268e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 5269e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5270e9e3bcecSEric Sandeen } 5271e9e3bcecSEric Sandeen 52725dabfc78STheodore Ts'o err = ext4_init_pageio(); 52736fd058f7STheodore Ts'o if (err) 52746fd058f7STheodore Ts'o return err; 52755dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5276bd2d0210STheodore Ts'o if (err) 5277d44651d0SFabrice Jouhaud goto out6; 52783197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 52790e376b1eSTheodore Ts'o if (!ext4_kset) { 52800e376b1eSTheodore Ts'o err = -ENOMEM; 5281dd68314cSTheodore Ts'o goto out5; 52820e376b1eSTheodore Ts'o } 5283d44651d0SFabrice Jouhaud ext4_proc_root = proc_mkdir("fs/ext4", NULL); 5284857ac889SLukas Czerner 5285857ac889SLukas Czerner err = ext4_init_feat_adverts(); 5286dd68314cSTheodore Ts'o if (err) 5287dd68314cSTheodore Ts'o goto out4; 5288857ac889SLukas Czerner 52895dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5290ac27a0ecSDave Kleikamp if (err) 52916fd058f7STheodore Ts'o goto out3; 5292c9de560dSAlex Tomas 52935dabfc78STheodore Ts'o err = ext4_init_xattr(); 5294c9de560dSAlex Tomas if (err) 5295c9de560dSAlex Tomas goto out2; 5296ac27a0ecSDave Kleikamp err = init_inodecache(); 5297ac27a0ecSDave Kleikamp if (err) 5298ac27a0ecSDave Kleikamp goto out1; 529924b58424STheodore Ts'o register_as_ext3(); 53002035e776STheodore Ts'o register_as_ext2(); 530103010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5302ac27a0ecSDave Kleikamp if (err) 5303ac27a0ecSDave Kleikamp goto out; 5304bfff6873SLukas Czerner 5305ac27a0ecSDave Kleikamp return 0; 5306ac27a0ecSDave Kleikamp out: 530724b58424STheodore Ts'o unregister_as_ext2(); 530824b58424STheodore Ts'o unregister_as_ext3(); 5309ac27a0ecSDave Kleikamp destroy_inodecache(); 5310ac27a0ecSDave Kleikamp out1: 53115dabfc78STheodore Ts'o ext4_exit_xattr(); 5312c9de560dSAlex Tomas out2: 53135dabfc78STheodore Ts'o ext4_exit_mballoc(); 53146fd058f7STheodore Ts'o out3: 53158f021222SLukas Czerner ext4_exit_feat_adverts(); 53166fd058f7STheodore Ts'o out4: 5317d44651d0SFabrice Jouhaud if (ext4_proc_root) 5318dd68314cSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 5319dd68314cSTheodore Ts'o kset_unregister(ext4_kset); 5320d44651d0SFabrice Jouhaud out5: 5321dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5322d44651d0SFabrice Jouhaud out6: 53235dabfc78STheodore Ts'o ext4_exit_pageio(); 5324ac27a0ecSDave Kleikamp return err; 5325ac27a0ecSDave Kleikamp } 5326ac27a0ecSDave Kleikamp 53275dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5328ac27a0ecSDave Kleikamp { 5329bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 533024b58424STheodore Ts'o unregister_as_ext2(); 533124b58424STheodore Ts'o unregister_as_ext3(); 533203010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5333ac27a0ecSDave Kleikamp destroy_inodecache(); 53345dabfc78STheodore Ts'o ext4_exit_xattr(); 53355dabfc78STheodore Ts'o ext4_exit_mballoc(); 53368f021222SLukas Czerner ext4_exit_feat_adverts(); 53379f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 53383197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 53395dabfc78STheodore Ts'o ext4_exit_system_zone(); 53405dabfc78STheodore Ts'o ext4_exit_pageio(); 5341ac27a0ecSDave Kleikamp } 5342ac27a0ecSDave Kleikamp 5343ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 534483982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5345ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 53465dabfc78STheodore Ts'o module_init(ext4_init_fs) 53475dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5348