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> 24ac27a0ecSDave Kleikamp #include <linux/slab.h> 25ac27a0ecSDave Kleikamp #include <linux/init.h> 26ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 2766114cadSTejun Heo #include <linux/backing-dev.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> 373197ebdbSTheodore Ts'o #include <linux/ctype.h> 381330593eSVignesh Babu #include <linux/log2.h> 39717d50e4SAndreas Dilger #include <linux/crc16.h> 407abc52c2SDan Magenheimer #include <linux/cleancache.h> 41ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 42ac27a0ecSDave Kleikamp 43bfff6873SLukas Czerner #include <linux/kthread.h> 44bfff6873SLukas Czerner #include <linux/freezer.h> 45bfff6873SLukas Czerner 463dcf5451SChristoph Hellwig #include "ext4.h" 474a092d73STheodore Ts'o #include "ext4_extents.h" /* Needed for trace points definition */ 483dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 49ac27a0ecSDave Kleikamp #include "xattr.h" 50ac27a0ecSDave Kleikamp #include "acl.h" 513661d286STheodore Ts'o #include "mballoc.h" 52ac27a0ecSDave Kleikamp 539bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 549bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 559bffad1eSTheodore Ts'o 560b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 570b75a840SLukas Czerner static struct mutex ext4_li_mtx; 58e294a537STheodore Ts'o static struct ratelimit_state ext4_mount_msg_ratelimit; 599f6200bbSTheodore Ts'o 60617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 61ac27a0ecSDave Kleikamp unsigned long journal_devnum); 622adf6da8STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root); 63e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 64617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 65617ba13bSMingming Cao struct ext4_super_block *es); 66617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 67617ba13bSMingming Cao struct ext4_super_block *es); 68617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 69617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 70617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 71c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 72c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 73152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 74152a0836SAl Viro const char *dev_name, void *data); 752035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 762035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 77d39195c3SAmir Goldstein static int ext4_feature_set_ok(struct super_block *sb, int readonly); 78bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 79bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 808f1f7453SEric Sandeen static void ext4_clear_request_list(void); 81ac27a0ecSDave Kleikamp 82e74031fdSJan Kara /* 83e74031fdSJan Kara * Lock ordering 84e74031fdSJan Kara * 85e74031fdSJan Kara * Note the difference between i_mmap_sem (EXT4_I(inode)->i_mmap_sem) and 86e74031fdSJan Kara * i_mmap_rwsem (inode->i_mmap_rwsem)! 87e74031fdSJan Kara * 88e74031fdSJan Kara * page fault path: 89e74031fdSJan Kara * mmap_sem -> sb_start_pagefault -> i_mmap_sem (r) -> transaction start -> 90e74031fdSJan Kara * page lock -> i_data_sem (rw) 91e74031fdSJan Kara * 92e74031fdSJan Kara * buffered write path: 93e74031fdSJan Kara * sb_start_write -> i_mutex -> mmap_sem 94e74031fdSJan Kara * sb_start_write -> i_mutex -> transaction start -> page lock -> 95e74031fdSJan Kara * i_data_sem (rw) 96e74031fdSJan Kara * 97e74031fdSJan Kara * truncate: 98e74031fdSJan Kara * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (w) -> i_mmap_sem (w) -> 99e74031fdSJan Kara * i_mmap_rwsem (w) -> page lock 100e74031fdSJan Kara * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (w) -> i_mmap_sem (w) -> 101e74031fdSJan Kara * transaction start -> i_data_sem (rw) 102e74031fdSJan Kara * 103e74031fdSJan Kara * direct IO: 104e74031fdSJan Kara * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (r) -> mmap_sem 105e74031fdSJan Kara * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (r) -> 106e74031fdSJan Kara * transaction start -> i_data_sem (rw) 107e74031fdSJan Kara * 108e74031fdSJan Kara * writepages: 109e74031fdSJan Kara * transaction start -> page lock(s) -> i_data_sem (rw) 110e74031fdSJan Kara */ 111e74031fdSJan Kara 112c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 1132035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 1142035e776STheodore Ts'o .owner = THIS_MODULE, 1152035e776STheodore Ts'o .name = "ext2", 1162035e776STheodore Ts'o .mount = ext4_mount, 1172035e776STheodore Ts'o .kill_sb = kill_block_super, 1182035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 1192035e776STheodore Ts'o }; 1207f78e035SEric W. Biederman MODULE_ALIAS_FS("ext2"); 121fa7614ddSEric W. Biederman MODULE_ALIAS("ext2"); 1222035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 1232035e776STheodore Ts'o #else 1242035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 1252035e776STheodore Ts'o #endif 1262035e776STheodore Ts'o 1272035e776STheodore Ts'o 128ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 129ba69f9abSJan Kara .owner = THIS_MODULE, 130ba69f9abSJan Kara .name = "ext3", 131152a0836SAl Viro .mount = ext4_mount, 132ba69f9abSJan Kara .kill_sb = kill_block_super, 133ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 134ba69f9abSJan Kara }; 1357f78e035SEric W. Biederman MODULE_ALIAS_FS("ext3"); 136fa7614ddSEric W. Biederman MODULE_ALIAS("ext3"); 137ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 138bd81d8eeSLaurent Vivier 139d25425f8SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 140d25425f8SDarrick J. Wong struct ext4_super_block *es) 141d25425f8SDarrick J. Wong { 142e2b911c5SDarrick J. Wong if (!ext4_has_feature_metadata_csum(sb)) 143d25425f8SDarrick J. Wong return 1; 144d25425f8SDarrick J. Wong 145d25425f8SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 146d25425f8SDarrick J. Wong } 147d25425f8SDarrick J. Wong 148a9c47317SDarrick J. Wong static __le32 ext4_superblock_csum(struct super_block *sb, 149a9c47317SDarrick J. Wong struct ext4_super_block *es) 150a9c47317SDarrick J. Wong { 151a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 152a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 153a9c47317SDarrick J. Wong __u32 csum; 154a9c47317SDarrick J. Wong 155a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 156a9c47317SDarrick J. Wong 157a9c47317SDarrick J. Wong return cpu_to_le32(csum); 158a9c47317SDarrick J. Wong } 159a9c47317SDarrick J. Wong 160c197855eSStephen Hemminger static int ext4_superblock_csum_verify(struct super_block *sb, 161a9c47317SDarrick J. Wong struct ext4_super_block *es) 162a9c47317SDarrick J. Wong { 1639aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 164a9c47317SDarrick J. Wong return 1; 165a9c47317SDarrick J. Wong 166a9c47317SDarrick J. Wong return es->s_checksum == ext4_superblock_csum(sb, es); 167a9c47317SDarrick J. Wong } 168a9c47317SDarrick J. Wong 16906db49e6STheodore Ts'o void ext4_superblock_csum_set(struct super_block *sb) 170a9c47317SDarrick J. Wong { 17106db49e6STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 17206db49e6STheodore Ts'o 1739aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 174a9c47317SDarrick J. Wong return; 175a9c47317SDarrick J. Wong 176a9c47317SDarrick J. Wong es->s_checksum = ext4_superblock_csum(sb, es); 177a9c47317SDarrick J. Wong } 178a9c47317SDarrick J. Wong 1799933fc0aSTheodore Ts'o void *ext4_kvmalloc(size_t size, gfp_t flags) 1809933fc0aSTheodore Ts'o { 1819933fc0aSTheodore Ts'o void *ret; 1829933fc0aSTheodore Ts'o 1838be04b93SJoe Perches ret = kmalloc(size, flags | __GFP_NOWARN); 1849933fc0aSTheodore Ts'o if (!ret) 1859933fc0aSTheodore Ts'o ret = __vmalloc(size, flags, PAGE_KERNEL); 1869933fc0aSTheodore Ts'o return ret; 1879933fc0aSTheodore Ts'o } 1889933fc0aSTheodore Ts'o 1899933fc0aSTheodore Ts'o void *ext4_kvzalloc(size_t size, gfp_t flags) 1909933fc0aSTheodore Ts'o { 1919933fc0aSTheodore Ts'o void *ret; 1929933fc0aSTheodore Ts'o 1938be04b93SJoe Perches ret = kzalloc(size, flags | __GFP_NOWARN); 1949933fc0aSTheodore Ts'o if (!ret) 1959933fc0aSTheodore Ts'o ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); 1969933fc0aSTheodore Ts'o return ret; 1979933fc0aSTheodore Ts'o } 1989933fc0aSTheodore Ts'o 1998fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 2008fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 201bd81d8eeSLaurent Vivier { 2023a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 2038fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2048fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 205bd81d8eeSLaurent Vivier } 206bd81d8eeSLaurent Vivier 2078fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 2088fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 209bd81d8eeSLaurent Vivier { 2105272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 2118fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2128fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 213bd81d8eeSLaurent Vivier } 214bd81d8eeSLaurent Vivier 2158fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 2168fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 217bd81d8eeSLaurent Vivier { 2185272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 2198fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2208fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 221bd81d8eeSLaurent Vivier } 222bd81d8eeSLaurent Vivier 223021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 224560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 225560671a0SAneesh Kumar K.V { 226560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 227560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 228560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 229560671a0SAneesh Kumar K.V } 230560671a0SAneesh Kumar K.V 231560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 232560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 233560671a0SAneesh Kumar K.V { 234560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 235560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 236560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 237560671a0SAneesh Kumar K.V } 238560671a0SAneesh Kumar K.V 239560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 240560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 241560671a0SAneesh Kumar K.V { 242560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 243560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 244560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 245560671a0SAneesh Kumar K.V } 246560671a0SAneesh Kumar K.V 247560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 248560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 249560671a0SAneesh Kumar K.V { 250560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 251560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 252560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 253560671a0SAneesh Kumar K.V } 254560671a0SAneesh Kumar K.V 2558fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 2568fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 257bd81d8eeSLaurent Vivier { 2583a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 2598fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2608fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 261bd81d8eeSLaurent Vivier } 262bd81d8eeSLaurent Vivier 2638fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 2648fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 265bd81d8eeSLaurent Vivier { 2665272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 2678fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2688fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 269bd81d8eeSLaurent Vivier } 270bd81d8eeSLaurent Vivier 2718fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 2728fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 273bd81d8eeSLaurent Vivier { 2745272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 2758fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2768fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 277bd81d8eeSLaurent Vivier } 278bd81d8eeSLaurent Vivier 279021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 280560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 281560671a0SAneesh Kumar K.V { 282560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 283560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 284560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 285560671a0SAneesh Kumar K.V } 286560671a0SAneesh Kumar K.V 287560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 288560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 289560671a0SAneesh Kumar K.V { 290560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 291560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 292560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 293560671a0SAneesh Kumar K.V } 294560671a0SAneesh Kumar K.V 295560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 296560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 297560671a0SAneesh Kumar K.V { 298560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 299560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 300560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 301560671a0SAneesh Kumar K.V } 302560671a0SAneesh Kumar K.V 303560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 304560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 305560671a0SAneesh Kumar K.V { 306560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 307560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 308560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 309560671a0SAneesh Kumar K.V } 310560671a0SAneesh Kumar K.V 311d3d1faf6SCurt Wohlgemuth 3121c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 3131c13d5c0STheodore Ts'o unsigned int line) 3141c13d5c0STheodore Ts'o { 3151c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3161c13d5c0STheodore Ts'o 3171c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3181b46617bSTheodore Ts'o if (bdev_read_only(sb->s_bdev)) 3191b46617bSTheodore Ts'o return; 3201c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3211c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 3221c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3231c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 3241c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 3251c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 3261c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 3271c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 3281c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3291c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 3301c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 3311c13d5c0STheodore Ts'o } 33266e61a9eSTheodore Ts'o /* 33366e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 33466e61a9eSTheodore Ts'o * started already 33566e61a9eSTheodore Ts'o */ 33666e61a9eSTheodore Ts'o if (!es->s_error_count) 33766e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 338ba39ebb6SWei Yongjun le32_add_cpu(&es->s_error_count, 1); 3391c13d5c0STheodore Ts'o } 3401c13d5c0STheodore Ts'o 3411c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 3421c13d5c0STheodore Ts'o unsigned int line) 3431c13d5c0STheodore Ts'o { 3441c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 3451c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 3461c13d5c0STheodore Ts'o } 3471c13d5c0STheodore Ts'o 348bdfe0cbdSTheodore Ts'o /* 349bdfe0cbdSTheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 350bdfe0cbdSTheodore Ts'o * structures, including the bdi structure, without telling anyone 351bdfe0cbdSTheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 352bdfe0cbdSTheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 353bdfe0cbdSTheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 354bdfe0cbdSTheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 355bdfe0cbdSTheodore Ts'o */ 356bdfe0cbdSTheodore Ts'o static int block_device_ejected(struct super_block *sb) 357bdfe0cbdSTheodore Ts'o { 358bdfe0cbdSTheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 359bdfe0cbdSTheodore Ts'o struct backing_dev_info *bdi = inode_to_bdi(bd_inode); 360bdfe0cbdSTheodore Ts'o 361bdfe0cbdSTheodore Ts'o return bdi->dev == NULL; 362bdfe0cbdSTheodore Ts'o } 363bdfe0cbdSTheodore Ts'o 36418aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 36518aadd47SBobi Jam { 36618aadd47SBobi Jam struct super_block *sb = journal->j_private; 36718aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 36818aadd47SBobi Jam int error = is_journal_aborted(journal); 3695d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 37018aadd47SBobi Jam 3715d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 37218aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 3735d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 3745d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 3755d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 37618aadd47SBobi Jam list_del_init(&jce->jce_list); 37718aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 37818aadd47SBobi Jam jce->jce_func(sb, jce, error); 37918aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 38018aadd47SBobi Jam } 38118aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 38218aadd47SBobi Jam } 3831c13d5c0STheodore Ts'o 384ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 385ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 386ac27a0ecSDave Kleikamp * 387ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 388617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 389ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 390ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 391ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 392ac27a0ecSDave Kleikamp * write out the superblock safely. 393ac27a0ecSDave Kleikamp * 394dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 395d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 396ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 397ac27a0ecSDave Kleikamp */ 398ac27a0ecSDave Kleikamp 399617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 400ac27a0ecSDave Kleikamp { 401ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 402ac27a0ecSDave Kleikamp return; 403ac27a0ecSDave Kleikamp 404ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 405617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 406ac27a0ecSDave Kleikamp 4074ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 408ac27a0ecSDave Kleikamp if (journal) 409dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 410ac27a0ecSDave Kleikamp } 411ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 412b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 4134418e141SDmitry Monakhov /* 4144418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 4154418e141SDmitry Monakhov * before ->s_flags update 4164418e141SDmitry Monakhov */ 4174418e141SDmitry Monakhov smp_wmb(); 418ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 419ac27a0ecSDave Kleikamp } 4204327ba52SDaeho Jeong if (test_opt(sb, ERRORS_PANIC)) { 4214327ba52SDaeho Jeong if (EXT4_SB(sb)->s_journal && 4224327ba52SDaeho Jeong !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) 4234327ba52SDaeho Jeong return; 424617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 425ac27a0ecSDave Kleikamp sb->s_id); 426ac27a0ecSDave Kleikamp } 4274327ba52SDaeho Jeong } 428ac27a0ecSDave Kleikamp 429efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 430efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 431efbed4dcSTheodore Ts'o "EXT4-fs error") 432efbed4dcSTheodore Ts'o 43312062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 434c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 435ac27a0ecSDave Kleikamp { 4360ff2ea7dSJoe Perches struct va_format vaf; 437ac27a0ecSDave Kleikamp va_list args; 438ac27a0ecSDave Kleikamp 439efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 440ac27a0ecSDave Kleikamp va_start(args, fmt); 4410ff2ea7dSJoe Perches vaf.fmt = fmt; 4420ff2ea7dSJoe Perches vaf.va = &args; 443efbed4dcSTheodore Ts'o printk(KERN_CRIT 444efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 4450ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 446ac27a0ecSDave Kleikamp va_end(args); 447efbed4dcSTheodore Ts'o } 448f3fc0210STheodore Ts'o save_error_info(sb, function, line); 449617ba13bSMingming Cao ext4_handle_error(sb); 450ac27a0ecSDave Kleikamp } 451ac27a0ecSDave Kleikamp 452e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 453c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 454273df556SFrank Mayhar const char *fmt, ...) 455273df556SFrank Mayhar { 456273df556SFrank Mayhar va_list args; 457f7c21177STheodore Ts'o struct va_format vaf; 4581c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 459273df556SFrank Mayhar 4601c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4611c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 462efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 463273df556SFrank Mayhar va_start(args, fmt); 464f7c21177STheodore Ts'o vaf.fmt = fmt; 465f7c21177STheodore Ts'o vaf.va = &args; 466c398eda0STheodore Ts'o if (block) 467d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 468d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 469d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 470d9ee81daSJoe Perches block, current->comm, &vaf); 471d9ee81daSJoe Perches else 472d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 473d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 474d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 475d9ee81daSJoe Perches current->comm, &vaf); 476273df556SFrank Mayhar va_end(args); 477efbed4dcSTheodore Ts'o } 478efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 479273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 480273df556SFrank Mayhar } 481273df556SFrank Mayhar 482e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 483f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 484f7c21177STheodore Ts'o const char *fmt, ...) 485273df556SFrank Mayhar { 486273df556SFrank Mayhar va_list args; 487f7c21177STheodore Ts'o struct va_format vaf; 4881c13d5c0STheodore Ts'o struct ext4_super_block *es; 489496ad9aaSAl Viro struct inode *inode = file_inode(file); 490273df556SFrank Mayhar char pathname[80], *path; 491273df556SFrank Mayhar 4921c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 4931c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 494efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 4959bf39ab2SMiklos Szeredi path = file_path(file, pathname, sizeof(pathname)); 496f9a62d09SDan Carpenter if (IS_ERR(path)) 497273df556SFrank Mayhar path = "(unknown)"; 498f7c21177STheodore Ts'o va_start(args, fmt); 499f7c21177STheodore Ts'o vaf.fmt = fmt; 500f7c21177STheodore Ts'o vaf.va = &args; 501d9ee81daSJoe Perches if (block) 502d9ee81daSJoe Perches printk(KERN_CRIT 503d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 504d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 505d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 506d9ee81daSJoe Perches block, current->comm, path, &vaf); 507d9ee81daSJoe Perches else 508d9ee81daSJoe Perches printk(KERN_CRIT 509d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 510d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 511d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 512d9ee81daSJoe Perches current->comm, path, &vaf); 513273df556SFrank Mayhar va_end(args); 514efbed4dcSTheodore Ts'o } 515efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 516273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 517273df556SFrank Mayhar } 518273df556SFrank Mayhar 519722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 520ac27a0ecSDave Kleikamp char nbuf[16]) 521ac27a0ecSDave Kleikamp { 522ac27a0ecSDave Kleikamp char *errstr = NULL; 523ac27a0ecSDave Kleikamp 524ac27a0ecSDave Kleikamp switch (errno) { 5256a797d27SDarrick J. Wong case -EFSCORRUPTED: 5266a797d27SDarrick J. Wong errstr = "Corrupt filesystem"; 5276a797d27SDarrick J. Wong break; 5286a797d27SDarrick J. Wong case -EFSBADCRC: 5296a797d27SDarrick J. Wong errstr = "Filesystem failed CRC"; 5306a797d27SDarrick J. Wong break; 531ac27a0ecSDave Kleikamp case -EIO: 532ac27a0ecSDave Kleikamp errstr = "IO failure"; 533ac27a0ecSDave Kleikamp break; 534ac27a0ecSDave Kleikamp case -ENOMEM: 535ac27a0ecSDave Kleikamp errstr = "Out of memory"; 536ac27a0ecSDave Kleikamp break; 537ac27a0ecSDave Kleikamp case -EROFS: 53878f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 53978f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 540ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 541ac27a0ecSDave Kleikamp else 542ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 543ac27a0ecSDave Kleikamp break; 544ac27a0ecSDave Kleikamp default: 545ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 546ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 547ac27a0ecSDave Kleikamp * NULL. */ 548ac27a0ecSDave Kleikamp if (nbuf) { 549ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 550ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 551ac27a0ecSDave Kleikamp errstr = nbuf; 552ac27a0ecSDave Kleikamp } 553ac27a0ecSDave Kleikamp break; 554ac27a0ecSDave Kleikamp } 555ac27a0ecSDave Kleikamp 556ac27a0ecSDave Kleikamp return errstr; 557ac27a0ecSDave Kleikamp } 558ac27a0ecSDave Kleikamp 559617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 560ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 561ac27a0ecSDave Kleikamp 562c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 563c398eda0STheodore Ts'o unsigned int line, int errno) 564ac27a0ecSDave Kleikamp { 565ac27a0ecSDave Kleikamp char nbuf[16]; 566ac27a0ecSDave Kleikamp const char *errstr; 567ac27a0ecSDave Kleikamp 568ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 569ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 570ac27a0ecSDave Kleikamp * an error. */ 571ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 572ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 573ac27a0ecSDave Kleikamp return; 574ac27a0ecSDave Kleikamp 575efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 576617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 577c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 578c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 579efbed4dcSTheodore Ts'o } 580ac27a0ecSDave Kleikamp 581efbed4dcSTheodore Ts'o save_error_info(sb, function, line); 582617ba13bSMingming Cao ext4_handle_error(sb); 583ac27a0ecSDave Kleikamp } 584ac27a0ecSDave Kleikamp 585ac27a0ecSDave Kleikamp /* 586617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 587ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 588ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 589ac27a0ecSDave Kleikamp * 590ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 591ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 592ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 593ac27a0ecSDave Kleikamp */ 594ac27a0ecSDave Kleikamp 595c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 596c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 597ac27a0ecSDave Kleikamp { 598ac27a0ecSDave Kleikamp va_list args; 599ac27a0ecSDave Kleikamp 6001c13d5c0STheodore Ts'o save_error_info(sb, function, line); 601ac27a0ecSDave Kleikamp va_start(args, fmt); 602c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 603c398eda0STheodore Ts'o function, line); 604ac27a0ecSDave Kleikamp vprintk(fmt, args); 605ac27a0ecSDave Kleikamp printk("\n"); 606ac27a0ecSDave Kleikamp va_end(args); 607ac27a0ecSDave Kleikamp 6081c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 609b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 6104ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 6114418e141SDmitry Monakhov /* 6124418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 6134418e141SDmitry Monakhov * before ->s_flags update 6144418e141SDmitry Monakhov */ 6154418e141SDmitry Monakhov smp_wmb(); 6164418e141SDmitry Monakhov sb->s_flags |= MS_RDONLY; 617ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 618dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 6191c13d5c0STheodore Ts'o save_error_info(sb, function, line); 6201c13d5c0STheodore Ts'o } 6214327ba52SDaeho Jeong if (test_opt(sb, ERRORS_PANIC)) { 6224327ba52SDaeho Jeong if (EXT4_SB(sb)->s_journal && 6234327ba52SDaeho Jeong !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) 6244327ba52SDaeho Jeong return; 6251c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 626ac27a0ecSDave Kleikamp } 6274327ba52SDaeho Jeong } 628ac27a0ecSDave Kleikamp 629e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 630e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 631b31e1552SEric Sandeen { 6320ff2ea7dSJoe Perches struct va_format vaf; 633b31e1552SEric Sandeen va_list args; 634b31e1552SEric Sandeen 635efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) 636efbed4dcSTheodore Ts'o return; 637efbed4dcSTheodore Ts'o 638b31e1552SEric Sandeen va_start(args, fmt); 6390ff2ea7dSJoe Perches vaf.fmt = fmt; 6400ff2ea7dSJoe Perches vaf.va = &args; 6410ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 642b31e1552SEric Sandeen va_end(args); 643b31e1552SEric Sandeen } 644b31e1552SEric Sandeen 645b03a2f7eSAndreas Dilger #define ext4_warning_ratelimit(sb) \ 646b03a2f7eSAndreas Dilger ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), \ 647b03a2f7eSAndreas Dilger "EXT4-fs warning") 648b03a2f7eSAndreas Dilger 64912062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 650c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 651ac27a0ecSDave Kleikamp { 6520ff2ea7dSJoe Perches struct va_format vaf; 653ac27a0ecSDave Kleikamp va_list args; 654ac27a0ecSDave Kleikamp 655b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(sb)) 656efbed4dcSTheodore Ts'o return; 657efbed4dcSTheodore Ts'o 658ac27a0ecSDave Kleikamp va_start(args, fmt); 6590ff2ea7dSJoe Perches vaf.fmt = fmt; 6600ff2ea7dSJoe Perches vaf.va = &args; 6610ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 6620ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 663ac27a0ecSDave Kleikamp va_end(args); 664ac27a0ecSDave Kleikamp } 665ac27a0ecSDave Kleikamp 666b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 667b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...) 668b03a2f7eSAndreas Dilger { 669b03a2f7eSAndreas Dilger struct va_format vaf; 670b03a2f7eSAndreas Dilger va_list args; 671b03a2f7eSAndreas Dilger 672b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(inode->i_sb)) 673b03a2f7eSAndreas Dilger return; 674b03a2f7eSAndreas Dilger 675b03a2f7eSAndreas Dilger va_start(args, fmt); 676b03a2f7eSAndreas Dilger vaf.fmt = fmt; 677b03a2f7eSAndreas Dilger vaf.va = &args; 678b03a2f7eSAndreas Dilger printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " 679b03a2f7eSAndreas Dilger "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, 680b03a2f7eSAndreas Dilger function, line, inode->i_ino, current->comm, &vaf); 681b03a2f7eSAndreas Dilger va_end(args); 682b03a2f7eSAndreas Dilger } 683b03a2f7eSAndreas Dilger 684e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 685e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 686e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 687e29136f8STheodore Ts'o const char *fmt, ...) 6885d1b1b3fSAneesh Kumar K.V __releases(bitlock) 6895d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 6905d1b1b3fSAneesh Kumar K.V { 6910ff2ea7dSJoe Perches struct va_format vaf; 6925d1b1b3fSAneesh Kumar K.V va_list args; 6935d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 6945d1b1b3fSAneesh Kumar K.V 6951c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 6961c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 6971c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 6980ff2ea7dSJoe Perches 699efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 7005d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 7010ff2ea7dSJoe Perches vaf.fmt = fmt; 7020ff2ea7dSJoe Perches vaf.va = &args; 70321149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 704e29136f8STheodore Ts'o sb->s_id, function, line, grp); 705e29136f8STheodore Ts'o if (ino) 7060ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 707e29136f8STheodore Ts'o if (block) 708efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 709efbed4dcSTheodore Ts'o (unsigned long long) block); 7100ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 7115d1b1b3fSAneesh Kumar K.V va_end(args); 712efbed4dcSTheodore Ts'o } 7135d1b1b3fSAneesh Kumar K.V 7145d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 715e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 7165d1b1b3fSAneesh Kumar K.V return; 7175d1b1b3fSAneesh Kumar K.V } 7181c13d5c0STheodore Ts'o 7195d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 7205d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 7215d1b1b3fSAneesh Kumar K.V /* 7225d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 7235d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 7245d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 7255d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 7265d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 72725985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 7285d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 7295d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 7305d1b1b3fSAneesh Kumar K.V * more appropriate error code. 7315d1b1b3fSAneesh Kumar K.V */ 7325d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 7335d1b1b3fSAneesh Kumar K.V return; 7345d1b1b3fSAneesh Kumar K.V } 7355d1b1b3fSAneesh Kumar K.V 736617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 737ac27a0ecSDave Kleikamp { 738617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 739ac27a0ecSDave Kleikamp 740617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 741ac27a0ecSDave Kleikamp return; 742ac27a0ecSDave Kleikamp 74312062dddSEric Sandeen ext4_warning(sb, 744ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 745ac27a0ecSDave Kleikamp "running e2fsck is recommended", 746617ba13bSMingming Cao EXT4_DYNAMIC_REV); 747ac27a0ecSDave Kleikamp 748617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 749617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 750617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 751ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 752ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 753ac27a0ecSDave Kleikamp 754ac27a0ecSDave Kleikamp /* 755ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 756ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 757ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 758ac27a0ecSDave Kleikamp */ 759ac27a0ecSDave Kleikamp } 760ac27a0ecSDave Kleikamp 761ac27a0ecSDave Kleikamp /* 762ac27a0ecSDave Kleikamp * Open the external journal device 763ac27a0ecSDave Kleikamp */ 764b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 765ac27a0ecSDave Kleikamp { 766ac27a0ecSDave Kleikamp struct block_device *bdev; 767ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 768ac27a0ecSDave Kleikamp 769d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 770ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 771ac27a0ecSDave Kleikamp goto fail; 772ac27a0ecSDave Kleikamp return bdev; 773ac27a0ecSDave Kleikamp 774ac27a0ecSDave Kleikamp fail: 775b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 776ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 777ac27a0ecSDave Kleikamp return NULL; 778ac27a0ecSDave Kleikamp } 779ac27a0ecSDave Kleikamp 780ac27a0ecSDave Kleikamp /* 781ac27a0ecSDave Kleikamp * Release the journal device 782ac27a0ecSDave Kleikamp */ 7834385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 784ac27a0ecSDave Kleikamp { 7854385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 786ac27a0ecSDave Kleikamp } 787ac27a0ecSDave Kleikamp 7884385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 789ac27a0ecSDave Kleikamp { 790ac27a0ecSDave Kleikamp struct block_device *bdev; 791ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 792ac27a0ecSDave Kleikamp if (bdev) { 7934385bab1SAl Viro ext4_blkdev_put(bdev); 794ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 795ac27a0ecSDave Kleikamp } 796ac27a0ecSDave Kleikamp } 797ac27a0ecSDave Kleikamp 798ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 799ac27a0ecSDave Kleikamp { 800617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 801ac27a0ecSDave Kleikamp } 802ac27a0ecSDave Kleikamp 803617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 804ac27a0ecSDave Kleikamp { 805ac27a0ecSDave Kleikamp struct list_head *l; 806ac27a0ecSDave Kleikamp 807b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 808ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 809ac27a0ecSDave Kleikamp 810ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 811ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 812ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 813ac27a0ecSDave Kleikamp printk(KERN_ERR " " 814ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 815ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 816ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 817ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 818ac27a0ecSDave Kleikamp } 819ac27a0ecSDave Kleikamp } 820ac27a0ecSDave Kleikamp 821617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 822ac27a0ecSDave Kleikamp { 823617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 824617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 825ef2cabf7SHidehiro Kawai int i, err; 826ac27a0ecSDave Kleikamp 827857ac889SLukas Czerner ext4_unregister_li_request(sb); 828e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 829e0ccfd95SChristoph Hellwig 8302e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 8312e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 8324c0425ffSMingming Cao 8330390131bSFrank Mayhar if (sbi->s_journal) { 834ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 83547b4a50bSJan Kara sbi->s_journal = NULL; 836ef2cabf7SHidehiro Kawai if (err < 0) 837c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 8380390131bSFrank Mayhar } 839d4edac31SJosef Bacik 840ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 841d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 8429105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 843d4edac31SJosef Bacik ext4_release_system_zone(sb); 844d4edac31SJosef Bacik ext4_mb_release(sb); 845d4edac31SJosef Bacik ext4_ext_release(sb); 846d4edac31SJosef Bacik 847ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 848e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 849ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 850ac27a0ecSDave Kleikamp } 85158c5873aSArtem Bityutskiy if (!(sb->s_flags & MS_RDONLY)) 852a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 853a8e25a83SArtem Bityutskiy 854ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 855ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 856b93b41d4SAl Viro kvfree(sbi->s_group_desc); 857b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 85857042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 859ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 860ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 86157042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 862c8585c6fSDaeho Jeong percpu_free_rwsem(&sbi->s_journal_flag_rwsem); 863ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 864ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 865a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 866ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 867ac27a0ecSDave Kleikamp #endif 868ac27a0ecSDave Kleikamp 869ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 870ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 871ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 872ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 873ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 874ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 875ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 876ac27a0ecSDave Kleikamp 87789d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 878f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 879ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 880ac27a0ecSDave Kleikamp /* 881ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 882ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 883ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 884ac27a0ecSDave Kleikamp */ 885ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 886f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 887617ba13bSMingming Cao ext4_blkdev_remove(sbi); 888ac27a0ecSDave Kleikamp } 8899c191f70ST Makphaibulchoke if (sbi->s_mb_cache) { 8909c191f70ST Makphaibulchoke ext4_xattr_destroy_cache(sbi->s_mb_cache); 8919c191f70ST Makphaibulchoke sbi->s_mb_cache = NULL; 8929c191f70ST Makphaibulchoke } 893c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 894c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 895ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 8963197ebdbSTheodore Ts'o /* 8973197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 8983197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 8993197ebdbSTheodore Ts'o */ 9003197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 9013197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 9020441984aSDarrick J. Wong if (sbi->s_chksum_driver) 9030441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 904705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 905ac27a0ecSDave Kleikamp kfree(sbi); 906ac27a0ecSDave Kleikamp } 907ac27a0ecSDave Kleikamp 908e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 909ac27a0ecSDave Kleikamp 910ac27a0ecSDave Kleikamp /* 911ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 912ac27a0ecSDave Kleikamp */ 913617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 914ac27a0ecSDave Kleikamp { 915617ba13bSMingming Cao struct ext4_inode_info *ei; 916ac27a0ecSDave Kleikamp 917e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 918ac27a0ecSDave Kleikamp if (!ei) 919ac27a0ecSDave Kleikamp return NULL; 9200b8e58a1SAndreas Dilger 921ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 922202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 923c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 924c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 9259a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 9269a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 927edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 928eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 929edaa53caSZheng Liu ei->i_es_shk_nr = 0; 930dd475925SJan Kara ei->i_es_shrink_lblk = 0; 931d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 932d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 933d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 9349d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 9357e731bc9STheodore Ts'o ei->i_da_metadata_calc_last_lblock = 0; 936d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 937a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 938a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 93996c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 940a9e7f447SDmitry Monakhov #endif 9418aefcd55STheodore Ts'o ei->jinode = NULL; 9422e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 943744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 944b436b9beSJan Kara ei->i_sync_tid = 0; 945b436b9beSJan Kara ei->i_datasync_tid = 0; 946e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 9472e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 948ac27a0ecSDave Kleikamp return &ei->vfs_inode; 949ac27a0ecSDave Kleikamp } 950ac27a0ecSDave Kleikamp 9517ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 9527ff9c073STheodore Ts'o { 9537ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 9547ff9c073STheodore Ts'o 9557ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 9567ff9c073STheodore Ts'o return drop; 9577ff9c073STheodore Ts'o } 9587ff9c073STheodore Ts'o 959fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 960fa0d7e3dSNick Piggin { 961fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 962fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 963fa0d7e3dSNick Piggin } 964fa0d7e3dSNick Piggin 965617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 966ac27a0ecSDave Kleikamp { 9679f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 968b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 969b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 970b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 9719f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 9729f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 9739f7dd93dSVasily Averin true); 9749f7dd93dSVasily Averin dump_stack(); 9759f7dd93dSVasily Averin } 976fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 977ac27a0ecSDave Kleikamp } 978ac27a0ecSDave Kleikamp 97951cc5068SAlexey Dobriyan static void init_once(void *foo) 980ac27a0ecSDave Kleikamp { 981617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 982ac27a0ecSDave Kleikamp 983ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 984ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 9850e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 986ea3d7209SJan Kara init_rwsem(&ei->i_mmap_sem); 987ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 988ac27a0ecSDave Kleikamp } 989ac27a0ecSDave Kleikamp 990e67bc2b3SFabian Frederick static int __init init_inodecache(void) 991ac27a0ecSDave Kleikamp { 992617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 993617ba13bSMingming Cao sizeof(struct ext4_inode_info), 994ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 9955d097056SVladimir Davydov SLAB_MEM_SPREAD|SLAB_ACCOUNT), 99620c2df83SPaul Mundt init_once); 997617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 998ac27a0ecSDave Kleikamp return -ENOMEM; 999ac27a0ecSDave Kleikamp return 0; 1000ac27a0ecSDave Kleikamp } 1001ac27a0ecSDave Kleikamp 1002ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1003ac27a0ecSDave Kleikamp { 10048c0a8537SKirill A. Shutemov /* 10058c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 10068c0a8537SKirill A. Shutemov * destroy cache. 10078c0a8537SKirill A. Shutemov */ 10088c0a8537SKirill A. Shutemov rcu_barrier(); 1009617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1010ac27a0ecSDave Kleikamp } 1011ac27a0ecSDave Kleikamp 10120930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1013ac27a0ecSDave Kleikamp { 10140930fcc1SAl Viro invalidate_inode_buffers(inode); 1015dbd5768fSJan Kara clear_inode(inode); 10169f754758SChristoph Hellwig dquot_drop(inode); 1017c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 101851865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 10198aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 10208aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 10218aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 10228aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 10238aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 10248aefcd55STheodore Ts'o } 1025b7236e21STheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 1026a7550b30SJaegeuk Kim fscrypt_put_encryption_info(inode, NULL); 1027b7236e21STheodore Ts'o #endif 1028ac27a0ecSDave Kleikamp } 1029ac27a0ecSDave Kleikamp 10301b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 10311b961ac0SChristoph Hellwig u64 ino, u32 generation) 1032ac27a0ecSDave Kleikamp { 1033ac27a0ecSDave Kleikamp struct inode *inode; 1034ac27a0ecSDave Kleikamp 1035617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1036ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1037617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1038ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1039ac27a0ecSDave Kleikamp 1040ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1041ac27a0ecSDave Kleikamp * 1042617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1043ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1044ac27a0ecSDave Kleikamp * 1045ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1046ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1047ac27a0ecSDave Kleikamp */ 1048f4bb2981STheodore Ts'o inode = ext4_iget_normal(sb, ino); 10491d1fe1eeSDavid Howells if (IS_ERR(inode)) 10501d1fe1eeSDavid Howells return ERR_CAST(inode); 10511d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1052ac27a0ecSDave Kleikamp iput(inode); 1053ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1054ac27a0ecSDave Kleikamp } 10551b961ac0SChristoph Hellwig 10561b961ac0SChristoph Hellwig return inode; 1057ac27a0ecSDave Kleikamp } 10581b961ac0SChristoph Hellwig 10591b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 10601b961ac0SChristoph Hellwig int fh_len, int fh_type) 10611b961ac0SChristoph Hellwig { 10621b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 10631b961ac0SChristoph Hellwig ext4_nfs_get_inode); 10641b961ac0SChristoph Hellwig } 10651b961ac0SChristoph Hellwig 10661b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 10671b961ac0SChristoph Hellwig int fh_len, int fh_type) 10681b961ac0SChristoph Hellwig { 10691b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 10701b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1071ac27a0ecSDave Kleikamp } 1072ac27a0ecSDave Kleikamp 1073c39a7f84SToshiyuki Okajima /* 1074c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1075c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1076c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1077c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1078c39a7f84SToshiyuki Okajima */ 10790b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 10800b8e58a1SAndreas Dilger gfp_t wait) 1081c39a7f84SToshiyuki Okajima { 1082c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1083c39a7f84SToshiyuki Okajima 1084c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1085c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1086c39a7f84SToshiyuki Okajima return 0; 1087c39a7f84SToshiyuki Okajima if (journal) 1088c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1089d0164adcSMel Gorman wait & ~__GFP_DIRECT_RECLAIM); 1090c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1091c39a7f84SToshiyuki Okajima } 1092c39a7f84SToshiyuki Okajima 1093a7550b30SJaegeuk Kim #ifdef CONFIG_EXT4_FS_ENCRYPTION 1094a7550b30SJaegeuk Kim static int ext4_get_context(struct inode *inode, void *ctx, size_t len) 1095a7550b30SJaegeuk Kim { 1096a7550b30SJaegeuk Kim return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, 1097a7550b30SJaegeuk Kim EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); 1098a7550b30SJaegeuk Kim } 1099a7550b30SJaegeuk Kim 1100a7550b30SJaegeuk Kim static int ext4_key_prefix(struct inode *inode, u8 **key) 1101a7550b30SJaegeuk Kim { 1102a7550b30SJaegeuk Kim *key = EXT4_SB(inode->i_sb)->key_prefix; 1103a7550b30SJaegeuk Kim return EXT4_SB(inode->i_sb)->key_prefix_size; 1104a7550b30SJaegeuk Kim } 1105a7550b30SJaegeuk Kim 1106a7550b30SJaegeuk Kim static int ext4_prepare_context(struct inode *inode) 1107a7550b30SJaegeuk Kim { 1108a7550b30SJaegeuk Kim return ext4_convert_inline_data(inode); 1109a7550b30SJaegeuk Kim } 1110a7550b30SJaegeuk Kim 1111a7550b30SJaegeuk Kim static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, 1112a7550b30SJaegeuk Kim void *fs_data) 1113a7550b30SJaegeuk Kim { 1114a7550b30SJaegeuk Kim handle_t *handle; 1115a7550b30SJaegeuk Kim int res, res2; 1116a7550b30SJaegeuk Kim 1117a7550b30SJaegeuk Kim /* fs_data is null when internally used. */ 1118a7550b30SJaegeuk Kim if (fs_data) { 1119a7550b30SJaegeuk Kim res = ext4_xattr_set(inode, EXT4_XATTR_INDEX_ENCRYPTION, 1120a7550b30SJaegeuk Kim EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, 1121a7550b30SJaegeuk Kim len, 0); 1122a7550b30SJaegeuk Kim if (!res) { 1123a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1124a7550b30SJaegeuk Kim ext4_clear_inode_state(inode, 1125a7550b30SJaegeuk Kim EXT4_STATE_MAY_INLINE_DATA); 1126a7550b30SJaegeuk Kim } 1127a7550b30SJaegeuk Kim return res; 1128a7550b30SJaegeuk Kim } 1129a7550b30SJaegeuk Kim 1130a7550b30SJaegeuk Kim handle = ext4_journal_start(inode, EXT4_HT_MISC, 1131a7550b30SJaegeuk Kim ext4_jbd2_credits_xattr(inode)); 1132a7550b30SJaegeuk Kim if (IS_ERR(handle)) 1133a7550b30SJaegeuk Kim return PTR_ERR(handle); 1134a7550b30SJaegeuk Kim 1135a7550b30SJaegeuk Kim res = ext4_xattr_set(inode, EXT4_XATTR_INDEX_ENCRYPTION, 1136a7550b30SJaegeuk Kim EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, 1137a7550b30SJaegeuk Kim len, 0); 1138a7550b30SJaegeuk Kim if (!res) { 1139a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1140a7550b30SJaegeuk Kim res = ext4_mark_inode_dirty(handle, inode); 1141a7550b30SJaegeuk Kim if (res) 1142a7550b30SJaegeuk Kim EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); 1143a7550b30SJaegeuk Kim } 1144a7550b30SJaegeuk Kim res2 = ext4_journal_stop(handle); 1145a7550b30SJaegeuk Kim if (!res) 1146a7550b30SJaegeuk Kim res = res2; 1147a7550b30SJaegeuk Kim return res; 1148a7550b30SJaegeuk Kim } 1149a7550b30SJaegeuk Kim 1150a7550b30SJaegeuk Kim static int ext4_dummy_context(struct inode *inode) 1151a7550b30SJaegeuk Kim { 1152a7550b30SJaegeuk Kim return DUMMY_ENCRYPTION_ENABLED(EXT4_SB(inode->i_sb)); 1153a7550b30SJaegeuk Kim } 1154a7550b30SJaegeuk Kim 1155a7550b30SJaegeuk Kim static unsigned ext4_max_namelen(struct inode *inode) 1156a7550b30SJaegeuk Kim { 1157a7550b30SJaegeuk Kim return S_ISLNK(inode->i_mode) ? inode->i_sb->s_blocksize : 1158a7550b30SJaegeuk Kim EXT4_NAME_LEN; 1159a7550b30SJaegeuk Kim } 1160a7550b30SJaegeuk Kim 1161a7550b30SJaegeuk Kim static struct fscrypt_operations ext4_cryptops = { 1162a7550b30SJaegeuk Kim .get_context = ext4_get_context, 1163a7550b30SJaegeuk Kim .key_prefix = ext4_key_prefix, 1164a7550b30SJaegeuk Kim .prepare_context = ext4_prepare_context, 1165a7550b30SJaegeuk Kim .set_context = ext4_set_context, 1166a7550b30SJaegeuk Kim .dummy_context = ext4_dummy_context, 1167a7550b30SJaegeuk Kim .is_encrypted = ext4_encrypted_inode, 1168a7550b30SJaegeuk Kim .empty_dir = ext4_empty_dir, 1169a7550b30SJaegeuk Kim .max_namelen = ext4_max_namelen, 1170a7550b30SJaegeuk Kim }; 1171a7550b30SJaegeuk Kim #else 1172a7550b30SJaegeuk Kim static struct fscrypt_operations ext4_cryptops = { 1173a7550b30SJaegeuk Kim .is_encrypted = ext4_encrypted_inode, 1174a7550b30SJaegeuk Kim }; 1175a7550b30SJaegeuk Kim #endif 1176a7550b30SJaegeuk Kim 1177ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1178689c958cSLi Xi static char *quotatypes[] = INITQFNAMES; 1179689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1180ac27a0ecSDave Kleikamp 1181617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1182617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1183617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1184617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1185617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 11866f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1187f00c9e44SJan Kara struct path *path); 1188ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 1189617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1190617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1191ac27a0ecSDave Kleikamp size_t len, loff_t off); 1192617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1193ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 11947c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 11957c319d32SAditya Kali unsigned int flags); 11967c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 11978f0e8746STheodore Ts'o static int ext4_get_next_id(struct super_block *sb, struct kqid *qid); 1198ac27a0ecSDave Kleikamp 119996c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 120096c7e0d9SJan Kara { 120196c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 120296c7e0d9SJan Kara } 120396c7e0d9SJan Kara 120461e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 120560e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1206617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1207617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1208617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1209617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1210a5b5ee32SJan Kara .write_info = ext4_write_info, 1211a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1212a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1213040cb378SLi Xi .get_projid = ext4_get_projid, 12148f0e8746STheodore Ts'o .get_next_id = ext4_get_next_id, 1215ac27a0ecSDave Kleikamp }; 1216ac27a0ecSDave Kleikamp 12170d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1218617ba13bSMingming Cao .quota_on = ext4_quota_on, 1219ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1220287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 12210a240339SJan Kara .get_state = dquot_get_state, 1222287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1223287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 12246332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 12256332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1226ac27a0ecSDave Kleikamp }; 1227ac27a0ecSDave Kleikamp #endif 1228ac27a0ecSDave Kleikamp 1229ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1230617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1231617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1232617ba13bSMingming Cao .write_inode = ext4_write_inode, 1233617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 12347ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 12350930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1236617ba13bSMingming Cao .put_super = ext4_put_super, 1237617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1238c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1239c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1240617ba13bSMingming Cao .statfs = ext4_statfs, 1241617ba13bSMingming Cao .remount_fs = ext4_remount, 1242617ba13bSMingming Cao .show_options = ext4_show_options, 1243ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1244617ba13bSMingming Cao .quota_read = ext4_quota_read, 1245617ba13bSMingming Cao .quota_write = ext4_quota_write, 124696c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1247ac27a0ecSDave Kleikamp #endif 1248c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1249ac27a0ecSDave Kleikamp }; 1250ac27a0ecSDave Kleikamp 125139655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 12521b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 12531b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1254617ba13bSMingming Cao .get_parent = ext4_get_parent, 1255ac27a0ecSDave Kleikamp }; 1256ac27a0ecSDave Kleikamp 1257ac27a0ecSDave Kleikamp enum { 1258ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1259ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 126072578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1261ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 126272578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1263ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1264ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1265ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 12666ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 1267ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 12685a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1269ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 1270*49da9392SJan Kara Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, Opt_dax, 12711449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 1272a26f4992STheodore Ts'o Opt_lazytime, Opt_nolazytime, 12731449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 12745328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1275744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1276fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1277c6d3d56dSDarrick J. Wong Opt_max_dir_size_kb, Opt_nojournal_checksum, 1278ac27a0ecSDave Kleikamp }; 1279ac27a0ecSDave Kleikamp 1280a447c093SSteven Whitehouse static const match_table_t tokens = { 1281ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1282ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1283ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1284ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1285ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1286ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1287ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1288ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1289ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1290ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1291ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1292ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1293ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1294ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 129572578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 129672578c33STheodore Ts'o {Opt_removed, "orlov"}, 1297ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1298ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1299ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1300ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1301e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 13025a916be1STheodore Ts'o {Opt_noload, "noload"}, 130372578c33STheodore Ts'o {Opt_removed, "nobh"}, 130472578c33STheodore Ts'o {Opt_removed, "bh"}, 1305ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 130630773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 130730773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1308ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1309ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1310818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1311c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, "nojournal_checksum"}, 1312818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1313ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1314ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1315ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1316ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 13175bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 13185bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1319ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1320ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1321ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1322ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1323ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1324ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 13255a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1326ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1327ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1328ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1329ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1330*49da9392SJan Kara {Opt_prjquota, "prjquota"}, 1331ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 133206705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 133306705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 133425ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1335923ae0ffSRoss Zwisler {Opt_dax, "dax"}, 1336c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 133764769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1338a26f4992STheodore Ts'o {Opt_lazytime, "lazytime"}, 1339a26f4992STheodore Ts'o {Opt_nolazytime, "nolazytime"}, 1340dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 134136ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 134236ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 13436fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 13446fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1345240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1346b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1347afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 134806705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 134906705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1350744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1351744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 13525328e635SEric Sandeen {Opt_discard, "discard"}, 13535328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1354fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1355fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1356fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1357df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 13586ddb2447STheodore Ts'o {Opt_test_dummy_encryption, "test_dummy_encryption"}, 1359c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1360c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1361c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1362c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1363c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1364f3f12faaSJosef Bacik {Opt_err, NULL}, 1365ac27a0ecSDave Kleikamp }; 1366ac27a0ecSDave Kleikamp 1367617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1368ac27a0ecSDave Kleikamp { 1369617ba13bSMingming Cao ext4_fsblk_t sb_block; 1370ac27a0ecSDave Kleikamp char *options = (char *) *data; 1371ac27a0ecSDave Kleikamp 1372ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1373ac27a0ecSDave Kleikamp return 1; /* Default location */ 13740b8e58a1SAndreas Dilger 1375ac27a0ecSDave Kleikamp options += 3; 13760b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1377ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1378ac27a0ecSDave Kleikamp if (*options && *options != ',') { 13794776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1380ac27a0ecSDave Kleikamp (char *) *data); 1381ac27a0ecSDave Kleikamp return 1; 1382ac27a0ecSDave Kleikamp } 1383ac27a0ecSDave Kleikamp if (*options == ',') 1384ac27a0ecSDave Kleikamp options++; 1385ac27a0ecSDave Kleikamp *data = (void *) options; 13860b8e58a1SAndreas Dilger 1387ac27a0ecSDave Kleikamp return sb_block; 1388ac27a0ecSDave Kleikamp } 1389ac27a0ecSDave Kleikamp 1390b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1391437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1392437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1393b3881f74STheodore Ts'o 139456c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 139556c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 139656c50f11SDmitry Monakhov { 139756c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 139856c50f11SDmitry Monakhov char *qname; 139903dafb5fSChen Gang int ret = -1; 140056c50f11SDmitry Monakhov 140156c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 140256c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 140356c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 140456c50f11SDmitry Monakhov "Cannot change journaled " 140556c50f11SDmitry Monakhov "quota options when quota turned on"); 140657f73c2cSTheodore Ts'o return -1; 140756c50f11SDmitry Monakhov } 1408e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1409c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, "Journaled quota options " 1410c325a67cSTheodore Ts'o "ignored when QUOTA feature is enabled"); 1411c325a67cSTheodore Ts'o return 1; 1412262b4662SJan Kara } 141356c50f11SDmitry Monakhov qname = match_strdup(args); 141456c50f11SDmitry Monakhov if (!qname) { 141556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 141656c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 141757f73c2cSTheodore Ts'o return -1; 141856c50f11SDmitry Monakhov } 141903dafb5fSChen Gang if (sbi->s_qf_names[qtype]) { 142003dafb5fSChen Gang if (strcmp(sbi->s_qf_names[qtype], qname) == 0) 142103dafb5fSChen Gang ret = 1; 142203dafb5fSChen Gang else 142356c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 142403dafb5fSChen Gang "%s quota file already specified", 142503dafb5fSChen Gang QTYPE2NAME(qtype)); 142603dafb5fSChen Gang goto errout; 142756c50f11SDmitry Monakhov } 142803dafb5fSChen Gang if (strchr(qname, '/')) { 142956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 143056c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 143103dafb5fSChen Gang goto errout; 143256c50f11SDmitry Monakhov } 143303dafb5fSChen Gang sbi->s_qf_names[qtype] = qname; 1434fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 143556c50f11SDmitry Monakhov return 1; 143603dafb5fSChen Gang errout: 143703dafb5fSChen Gang kfree(qname); 143803dafb5fSChen Gang return ret; 143956c50f11SDmitry Monakhov } 144056c50f11SDmitry Monakhov 144156c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 144256c50f11SDmitry Monakhov { 144356c50f11SDmitry Monakhov 144456c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 144556c50f11SDmitry Monakhov 144656c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 144756c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 144856c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 144956c50f11SDmitry Monakhov " when quota turned on"); 145057f73c2cSTheodore Ts'o return -1; 145156c50f11SDmitry Monakhov } 145203dafb5fSChen Gang kfree(sbi->s_qf_names[qtype]); 145356c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 145456c50f11SDmitry Monakhov return 1; 145556c50f11SDmitry Monakhov } 145656c50f11SDmitry Monakhov #endif 145756c50f11SDmitry Monakhov 145826092bf5STheodore Ts'o #define MOPT_SET 0x0001 145926092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 146026092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 146126092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 146226092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 146326092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 146426092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 146526092bf5STheodore Ts'o #define MOPT_Q 0 146626092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 146726092bf5STheodore Ts'o #else 146826092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 146926092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 147026092bf5STheodore Ts'o #endif 147126092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 14728dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 14738dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 14748dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1475ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 147626092bf5STheodore Ts'o 147726092bf5STheodore Ts'o static const struct mount_opts { 147826092bf5STheodore Ts'o int token; 147926092bf5STheodore Ts'o int mount_opt; 148026092bf5STheodore Ts'o int flags; 148126092bf5STheodore Ts'o } ext4_mount_opts[] = { 148226092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 148326092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 148426092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 148526092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 148626092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 148726092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 14888dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 14898dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 14908dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 14918dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 149226092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 149326092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 14948dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 14958dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 14968dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 149759d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1498c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1499c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 15008dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 15011e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 150226092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 15038dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 15041e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 15058dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 150626092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 150726092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 150826092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 15098dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 15107915a861SAles Novak MOPT_NO_EXT2}, 15118dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 15127915a861SAles Novak MOPT_NO_EXT2}, 151326092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 151426092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 151526092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 151626092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 151726092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 151826092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 151926092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 152026092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 152126092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 152226092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 1523923ae0ffSRoss Zwisler {Opt_dax, EXT4_MOUNT_DAX, MOPT_SET}, 152426092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 15250efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 15260efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 15275ba92bcfSCarlos Maiolino {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 15285ba92bcfSCarlos Maiolino {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, 15295ba92bcfSCarlos Maiolino {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 15308dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 15318dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 15328dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 15338dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 153426092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 153526092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 153626092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 153726092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 153826092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 153926092bf5STheodore Ts'o #else 154026092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 154126092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 154226092bf5STheodore Ts'o #endif 154326092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 154426092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 154526092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 154626092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 154726092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 154826092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 154926092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 1550*49da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 1551*49da9392SJan Kara MOPT_SET | MOPT_Q}, 155226092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 1553*49da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 1554*49da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 155526092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 155626092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 155726092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 155826092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 155926092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 156026092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 156126092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1562df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 15636ddb2447STheodore Ts'o {Opt_test_dummy_encryption, 0, MOPT_GTE0}, 156426092bf5STheodore Ts'o {Opt_err, 0, 0} 156526092bf5STheodore Ts'o }; 156626092bf5STheodore Ts'o 156726092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 156826092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 156926092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 157026092bf5STheodore Ts'o { 157126092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 157226092bf5STheodore Ts'o const struct mount_opts *m; 157308cefc7aSEric W. Biederman kuid_t uid; 157408cefc7aSEric W. Biederman kgid_t gid; 157526092bf5STheodore Ts'o int arg = 0; 157626092bf5STheodore Ts'o 157757f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 157857f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 157957f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 158057f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 158157f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 158257f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 158357f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 158457f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 158557f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 158657f73c2cSTheodore Ts'o #endif 158726092bf5STheodore Ts'o switch (token) { 1588f7048605STheodore Ts'o case Opt_noacl: 1589f7048605STheodore Ts'o case Opt_nouser_xattr: 1590f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1591f7048605STheodore Ts'o break; 159226092bf5STheodore Ts'o case Opt_sb: 159326092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 159426092bf5STheodore Ts'o case Opt_removed: 15955f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 159626092bf5STheodore Ts'o return 1; 159726092bf5STheodore Ts'o case Opt_abort: 159826092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 159926092bf5STheodore Ts'o return 1; 160026092bf5STheodore Ts'o case Opt_i_version: 160126092bf5STheodore Ts'o sb->s_flags |= MS_I_VERSION; 160226092bf5STheodore Ts'o return 1; 1603a26f4992STheodore Ts'o case Opt_lazytime: 1604a26f4992STheodore Ts'o sb->s_flags |= MS_LAZYTIME; 1605a26f4992STheodore Ts'o return 1; 1606a26f4992STheodore Ts'o case Opt_nolazytime: 1607a26f4992STheodore Ts'o sb->s_flags &= ~MS_LAZYTIME; 1608a26f4992STheodore Ts'o return 1; 160926092bf5STheodore Ts'o } 161026092bf5STheodore Ts'o 16115f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 16125f3633e3SJan Kara if (token == m->token) 16135f3633e3SJan Kara break; 16145f3633e3SJan Kara 16155f3633e3SJan Kara if (m->token == Opt_err) { 16165f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 16175f3633e3SJan Kara "or missing value", opt); 16185f3633e3SJan Kara return -1; 16195f3633e3SJan Kara } 16205f3633e3SJan Kara 16218dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 16228dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 16238dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 16248dc0aa8cSTheodore Ts'o return -1; 16258dc0aa8cSTheodore Ts'o } 16268dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 16278dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 16288dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 16298dc0aa8cSTheodore Ts'o return -1; 16308dc0aa8cSTheodore Ts'o } 16318dc0aa8cSTheodore Ts'o 1632ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 16330efb3b23SJan Kara return -1; 163426092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 163526092bf5STheodore Ts'o return -1; 1636c93cf2d7SDmitry Monakhov if (m->flags & MOPT_EXPLICIT) { 1637c93cf2d7SDmitry Monakhov if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 163826092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 16391e381f60SDmitry Monakhov } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 16401e381f60SDmitry Monakhov set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM); 1641c93cf2d7SDmitry Monakhov } else 1642c93cf2d7SDmitry Monakhov return -1; 1643c93cf2d7SDmitry Monakhov } 164426092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 164526092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 164626092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 164726092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 164826092bf5STheodore Ts'o "options when quota turned on"); 164926092bf5STheodore Ts'o return -1; 165026092bf5STheodore Ts'o } 165126092bf5STheodore Ts'o 165226092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 165326092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 165426092bf5STheodore Ts'o } else if (token == Opt_commit) { 165526092bf5STheodore Ts'o if (arg == 0) 165626092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 165726092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 165826092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 165926092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 166026092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 166126092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 166226092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1663e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1664e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1665e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1666e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 166726092bf5STheodore Ts'o return -1; 166826092bf5STheodore Ts'o } 166926092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 167026092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 167126092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 167226092bf5STheodore Ts'o if (!args->from) 167326092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 167426092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1675df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1676df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 167726092bf5STheodore Ts'o } else if (token == Opt_stripe) { 167826092bf5STheodore Ts'o sbi->s_stripe = arg; 16790efb3b23SJan Kara } else if (token == Opt_resuid) { 16800efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 16810efb3b23SJan Kara if (!uid_valid(uid)) { 16825f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 16830efb3b23SJan Kara return -1; 16840efb3b23SJan Kara } 16850efb3b23SJan Kara sbi->s_resuid = uid; 16860efb3b23SJan Kara } else if (token == Opt_resgid) { 16870efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 16880efb3b23SJan Kara if (!gid_valid(gid)) { 16895f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 16900efb3b23SJan Kara return -1; 16910efb3b23SJan Kara } 16920efb3b23SJan Kara sbi->s_resgid = gid; 16930efb3b23SJan Kara } else if (token == Opt_journal_dev) { 16940efb3b23SJan Kara if (is_remount) { 16950efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 16960efb3b23SJan Kara "Cannot specify journal on remount"); 16970efb3b23SJan Kara return -1; 16980efb3b23SJan Kara } 16990efb3b23SJan Kara *journal_devnum = arg; 1700ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 1701ad4eec61SEric Sandeen char *journal_path; 1702ad4eec61SEric Sandeen struct inode *journal_inode; 1703ad4eec61SEric Sandeen struct path path; 1704ad4eec61SEric Sandeen int error; 1705ad4eec61SEric Sandeen 1706ad4eec61SEric Sandeen if (is_remount) { 1707ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 1708ad4eec61SEric Sandeen "Cannot specify journal on remount"); 1709ad4eec61SEric Sandeen return -1; 1710ad4eec61SEric Sandeen } 1711ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 1712ad4eec61SEric Sandeen if (!journal_path) { 1713ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 1714ad4eec61SEric Sandeen "journal device string"); 1715ad4eec61SEric Sandeen return -1; 1716ad4eec61SEric Sandeen } 1717ad4eec61SEric Sandeen 1718ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 1719ad4eec61SEric Sandeen if (error) { 1720ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 1721ad4eec61SEric Sandeen "journal device path: error %d", error); 1722ad4eec61SEric Sandeen kfree(journal_path); 1723ad4eec61SEric Sandeen return -1; 1724ad4eec61SEric Sandeen } 1725ad4eec61SEric Sandeen 17262b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 1727ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 1728ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 1729ad4eec61SEric Sandeen "is not a block device", journal_path); 1730ad4eec61SEric Sandeen path_put(&path); 1731ad4eec61SEric Sandeen kfree(journal_path); 1732ad4eec61SEric Sandeen return -1; 1733ad4eec61SEric Sandeen } 1734ad4eec61SEric Sandeen 1735ad4eec61SEric Sandeen *journal_devnum = new_encode_dev(journal_inode->i_rdev); 1736ad4eec61SEric Sandeen path_put(&path); 1737ad4eec61SEric Sandeen kfree(journal_path); 17380efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 17390efb3b23SJan Kara if (arg > 7) { 17405f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 17410efb3b23SJan Kara " (must be 0-7)"); 17420efb3b23SJan Kara return -1; 17430efb3b23SJan Kara } 17440efb3b23SJan Kara *journal_ioprio = 17450efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 17466ddb2447STheodore Ts'o } else if (token == Opt_test_dummy_encryption) { 17476ddb2447STheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 17486ddb2447STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION; 17496ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 17506ddb2447STheodore Ts'o "Test dummy encryption mode enabled"); 17516ddb2447STheodore Ts'o #else 17526ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 17536ddb2447STheodore Ts'o "Test dummy encryption mount option ignored"); 17546ddb2447STheodore Ts'o #endif 175526092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 175626092bf5STheodore Ts'o if (is_remount) { 175726092bf5STheodore Ts'o if (!sbi->s_journal) 175826092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 17595f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 176026092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 176126092bf5STheodore Ts'o "Cannot change data mode on remount"); 176226092bf5STheodore Ts'o return -1; 176326092bf5STheodore Ts'o } 176426092bf5STheodore Ts'o } else { 176526092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 176626092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 176726092bf5STheodore Ts'o } 176826092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 176926092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 177026092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 177126092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 17725f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 17735f3633e3SJan Kara "quota options when quota turned on"); 177426092bf5STheodore Ts'o return -1; 177526092bf5STheodore Ts'o } 1776e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1777c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, 1778c325a67cSTheodore Ts'o "Quota format mount options ignored " 1779262b4662SJan Kara "when QUOTA feature is enabled"); 1780c325a67cSTheodore Ts'o return 1; 1781262b4662SJan Kara } 178226092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 178326092bf5STheodore Ts'o #endif 1784923ae0ffSRoss Zwisler } else if (token == Opt_dax) { 1785ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 1786ef83b6e8SDan Williams ext4_msg(sb, KERN_WARNING, 1787ef83b6e8SDan Williams "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); 1788ef83b6e8SDan Williams sbi->s_mount_opt |= m->mount_opt; 1789ef83b6e8SDan Williams #else 1790923ae0ffSRoss Zwisler ext4_msg(sb, KERN_INFO, "dax option not supported"); 1791923ae0ffSRoss Zwisler return -1; 1792923ae0ffSRoss Zwisler #endif 17937915a861SAles Novak } else if (token == Opt_data_err_abort) { 17947915a861SAles Novak sbi->s_mount_opt |= m->mount_opt; 17957915a861SAles Novak } else if (token == Opt_data_err_ignore) { 17967915a861SAles Novak sbi->s_mount_opt &= ~m->mount_opt; 179726092bf5STheodore Ts'o } else { 179826092bf5STheodore Ts'o if (!args->from) 179926092bf5STheodore Ts'o arg = 1; 180026092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 180126092bf5STheodore Ts'o arg = !arg; 180226092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 180326092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 180426092bf5STheodore Ts'o "buggy handling of option %s", opt); 180526092bf5STheodore Ts'o WARN_ON(1); 180626092bf5STheodore Ts'o return -1; 180726092bf5STheodore Ts'o } 180826092bf5STheodore Ts'o if (arg != 0) 180926092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 181026092bf5STheodore Ts'o else 181126092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 181226092bf5STheodore Ts'o } 181326092bf5STheodore Ts'o return 1; 181426092bf5STheodore Ts'o } 181526092bf5STheodore Ts'o 1816ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1817c3191067STheodore Ts'o unsigned long *journal_devnum, 1818b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1819661aa520SEric Sandeen int is_remount) 1820ac27a0ecSDave Kleikamp { 1821617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1822ac27a0ecSDave Kleikamp char *p; 1823ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 182426092bf5STheodore Ts'o int token; 1825ac27a0ecSDave Kleikamp 1826ac27a0ecSDave Kleikamp if (!options) 1827ac27a0ecSDave Kleikamp return 1; 1828ac27a0ecSDave Kleikamp 1829ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1830ac27a0ecSDave Kleikamp if (!*p) 1831ac27a0ecSDave Kleikamp continue; 183215121c18SEric Sandeen /* 183315121c18SEric Sandeen * Initialize args struct so we know whether arg was 183415121c18SEric Sandeen * found; some options take optional arguments. 183515121c18SEric Sandeen */ 1836caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 1837ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 183826092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 183926092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1840ac27a0ecSDave Kleikamp return 0; 1841ac27a0ecSDave Kleikamp } 1842ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1843*49da9392SJan Kara /* 1844*49da9392SJan Kara * We do the test below only for project quotas. 'usrquota' and 1845*49da9392SJan Kara * 'grpquota' mount options are allowed even without quota feature 1846*49da9392SJan Kara * to support legacy quotas in quota files. 1847*49da9392SJan Kara */ 1848*49da9392SJan Kara if (test_opt(sb, PRJQUOTA) && !ext4_has_feature_project(sb)) { 1849*49da9392SJan Kara ext4_msg(sb, KERN_ERR, "Project quota feature not enabled. " 1850*49da9392SJan Kara "Cannot enable project quota enforcement."); 1851*49da9392SJan Kara return 0; 1852*49da9392SJan Kara } 1853*49da9392SJan Kara if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1854482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1855fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1856ac27a0ecSDave Kleikamp 1857482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1858fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1859ac27a0ecSDave Kleikamp 186056c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1861b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1862b31e1552SEric Sandeen "format mixing"); 1863ac27a0ecSDave Kleikamp return 0; 1864ac27a0ecSDave Kleikamp } 1865ac27a0ecSDave Kleikamp 1866ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1867b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1868b31e1552SEric Sandeen "not specified"); 1869ac27a0ecSDave Kleikamp return 0; 1870ac27a0ecSDave Kleikamp } 1871ac27a0ecSDave Kleikamp } 1872ac27a0ecSDave Kleikamp #endif 1873261cb20cSJan Kara if (test_opt(sb, DIOREAD_NOLOCK)) { 1874261cb20cSJan Kara int blocksize = 1875261cb20cSJan Kara BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 1876261cb20cSJan Kara 187709cbfeafSKirill A. Shutemov if (blocksize < PAGE_SIZE) { 1878261cb20cSJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 1879261cb20cSJan Kara "dioread_nolock if block size != PAGE_SIZE"); 1880261cb20cSJan Kara return 0; 1881261cb20cSJan Kara } 1882261cb20cSJan Kara } 1883d4f76107SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 1884d4f76107SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 1885d4f76107SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with journal_async_commit " 1886d4f76107SJan Kara "in data=ordered mode"); 1887d4f76107SJan Kara return 0; 1888d4f76107SJan Kara } 1889ac27a0ecSDave Kleikamp return 1; 1890ac27a0ecSDave Kleikamp } 1891ac27a0ecSDave Kleikamp 18922adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 18932adf6da8STheodore Ts'o struct super_block *sb) 18942adf6da8STheodore Ts'o { 18952adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 18962adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 18972adf6da8STheodore Ts'o 18982adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 18992adf6da8STheodore Ts'o char *fmtname = ""; 19002adf6da8STheodore Ts'o 19012adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 19022adf6da8STheodore Ts'o case QFMT_VFS_OLD: 19032adf6da8STheodore Ts'o fmtname = "vfsold"; 19042adf6da8STheodore Ts'o break; 19052adf6da8STheodore Ts'o case QFMT_VFS_V0: 19062adf6da8STheodore Ts'o fmtname = "vfsv0"; 19072adf6da8STheodore Ts'o break; 19082adf6da8STheodore Ts'o case QFMT_VFS_V1: 19092adf6da8STheodore Ts'o fmtname = "vfsv1"; 19102adf6da8STheodore Ts'o break; 19112adf6da8STheodore Ts'o } 19122adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 19132adf6da8STheodore Ts'o } 19142adf6da8STheodore Ts'o 19152adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 1916a068acf2SKees Cook seq_show_option(seq, "usrjquota", sbi->s_qf_names[USRQUOTA]); 19172adf6da8STheodore Ts'o 19182adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 1919a068acf2SKees Cook seq_show_option(seq, "grpjquota", sbi->s_qf_names[GRPQUOTA]); 19202adf6da8STheodore Ts'o #endif 19212adf6da8STheodore Ts'o } 19222adf6da8STheodore Ts'o 19235a916be1STheodore Ts'o static const char *token2str(int token) 19245a916be1STheodore Ts'o { 192550df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 19265a916be1STheodore Ts'o 19275a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 19285a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 19295a916be1STheodore Ts'o break; 19305a916be1STheodore Ts'o return t->pattern; 19315a916be1STheodore Ts'o } 19325a916be1STheodore Ts'o 19332adf6da8STheodore Ts'o /* 19342adf6da8STheodore Ts'o * Show an option if 19352adf6da8STheodore Ts'o * - it's set to a non-default value OR 19362adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 19372adf6da8STheodore Ts'o */ 193866acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 193966acdcf4STheodore Ts'o int nodefs) 19402adf6da8STheodore Ts'o { 19412adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 19422adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 194366acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 19445a916be1STheodore Ts'o const struct mount_opts *m; 194566acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 19462adf6da8STheodore Ts'o 194766acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 194866acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 19492adf6da8STheodore Ts'o 19502adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 19515a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 19525a916be1STheodore Ts'o 19535a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 19545a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 19555a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 19565a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 19575a916be1STheodore Ts'o continue; 195866acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 19595a916be1STheodore Ts'o continue; /* skip if same as the default */ 19605a916be1STheodore Ts'o if ((want_set && 19615a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 19625a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 19635a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 19645a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 19655a916be1STheodore Ts'o } 19665a916be1STheodore Ts'o 196708cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 19685a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 196908cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 197008cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 197108cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 19725a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 197308cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 197408cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 197566acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 19765a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 19775a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 19782adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 19795a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 19802adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 19815a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 198266acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 19835a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 198466acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 19855a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 198666acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 19875a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 19882adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 19895a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 199066acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 19915a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 199266acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 19932adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 19945a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 19952adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 19965a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 19972adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 19985a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 19995a916be1STheodore Ts'o } 200066acdcf4STheodore Ts'o if (nodefs || 200166acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 20025a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 20032adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 20042adf6da8STheodore Ts'o 200566acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 200666acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 20075a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 2008df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 2009df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 20107915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 20117915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 20122adf6da8STheodore Ts'o 20132adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 20142adf6da8STheodore Ts'o return 0; 20152adf6da8STheodore Ts'o } 20162adf6da8STheodore Ts'o 201766acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 201866acdcf4STheodore Ts'o { 201966acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 202066acdcf4STheodore Ts'o } 202166acdcf4STheodore Ts'o 2022ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 202366acdcf4STheodore Ts'o { 202466acdcf4STheodore Ts'o struct super_block *sb = seq->private; 202566acdcf4STheodore Ts'o int rc; 202666acdcf4STheodore Ts'o 202766acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 202866acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 202966acdcf4STheodore Ts'o seq_puts(seq, "\n"); 203066acdcf4STheodore Ts'o return rc; 203166acdcf4STheodore Ts'o } 203266acdcf4STheodore Ts'o 2033617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 2034ac27a0ecSDave Kleikamp int read_only) 2035ac27a0ecSDave Kleikamp { 2036617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2037ac27a0ecSDave Kleikamp int res = 0; 2038ac27a0ecSDave Kleikamp 2039617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 2040b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 2041b31e1552SEric Sandeen "forcing read-only mode"); 2042ac27a0ecSDave Kleikamp res = MS_RDONLY; 2043ac27a0ecSDave Kleikamp } 2044ac27a0ecSDave Kleikamp if (read_only) 2045281b5995STheodore Ts'o goto done; 2046617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 2047b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 2048b31e1552SEric Sandeen "running e2fsck is recommended"); 2049c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 2050b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2051b31e1552SEric Sandeen "warning: mounting fs with errors, " 2052b31e1552SEric Sandeen "running e2fsck is recommended"); 2053ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 2054ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 2055ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 2056b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2057b31e1552SEric Sandeen "warning: maximal mount count reached, " 2058b31e1552SEric Sandeen "running e2fsck is recommended"); 2059ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 2060ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 2061ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 2062b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2063b31e1552SEric Sandeen "warning: checktime reached, " 2064b31e1552SEric Sandeen "running e2fsck is recommended"); 20650390131bSFrank Mayhar if (!sbi->s_journal) 2066216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 2067ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 2068617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 2069e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 2070ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 2071617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 20720390131bSFrank Mayhar if (sbi->s_journal) 2073e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 2074ac27a0ecSDave Kleikamp 2075e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 2076281b5995STheodore Ts'o done: 2077ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 2078a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 2079a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 2080ac27a0ecSDave Kleikamp sb->s_blocksize, 2081ac27a0ecSDave Kleikamp sbi->s_groups_count, 2082617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 2083617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 2084a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 2085ac27a0ecSDave Kleikamp 20867abc52c2SDan Magenheimer cleancache_init_fs(sb); 2087ac27a0ecSDave Kleikamp return res; 2088ac27a0ecSDave Kleikamp } 2089ac27a0ecSDave Kleikamp 2090117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 2091117fff10STheodore Ts'o { 2092117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 2093117fff10STheodore Ts'o struct flex_groups *new_groups; 2094117fff10STheodore Ts'o int size; 2095117fff10STheodore Ts'o 2096117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 2097117fff10STheodore Ts'o return 0; 2098117fff10STheodore Ts'o 2099117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 2100117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 2101117fff10STheodore Ts'o return 0; 2102117fff10STheodore Ts'o 2103117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 2104117fff10STheodore Ts'o new_groups = ext4_kvzalloc(size, GFP_KERNEL); 2105117fff10STheodore Ts'o if (!new_groups) { 2106117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 2107117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 2108117fff10STheodore Ts'o return -ENOMEM; 2109117fff10STheodore Ts'o } 2110117fff10STheodore Ts'o 2111117fff10STheodore Ts'o if (sbi->s_flex_groups) { 2112117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 2113117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 2114117fff10STheodore Ts'o sizeof(struct flex_groups))); 2115b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 2116117fff10STheodore Ts'o } 2117117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 2118117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 2119117fff10STheodore Ts'o return 0; 2120117fff10STheodore Ts'o } 2121117fff10STheodore Ts'o 2122772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 2123772cb7c8SJose R. Santos { 2124772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 2125772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 2126772cb7c8SJose R. Santos ext4_group_t flex_group; 2127117fff10STheodore Ts'o int i, err; 2128772cb7c8SJose R. Santos 2129503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 2130d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 2131772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 2132772cb7c8SJose R. Santos return 1; 2133772cb7c8SJose R. Santos } 2134772cb7c8SJose R. Santos 2135117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 2136117fff10STheodore Ts'o if (err) 2137772cb7c8SJose R. Santos goto failed; 2138772cb7c8SJose R. Santos 2139772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 214088b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 2141772cb7c8SJose R. Santos 2142772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 21437ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 21447ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 214590ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 214624aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 21477ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 21487ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 2149772cb7c8SJose R. Santos } 2150772cb7c8SJose R. Santos 2151772cb7c8SJose R. Santos return 1; 2152772cb7c8SJose R. Santos failed: 2153772cb7c8SJose R. Santos return 0; 2154772cb7c8SJose R. Santos } 2155772cb7c8SJose R. Santos 2156e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 2157717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2158717d50e4SAndreas Dilger { 2159b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 2160717d50e4SAndreas Dilger __u16 crc = 0; 2161717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2162e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 2163717d50e4SAndreas Dilger 21649aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 2165feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 2166feb0ab32SDarrick J. Wong __u32 csum32; 2167b47820edSDaeho Jeong __u16 dummy_csum = 0; 2168feb0ab32SDarrick J. Wong 2169feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 2170feb0ab32SDarrick J. Wong sizeof(le_group)); 2171b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 2172b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 2173b47820edSDaeho Jeong sizeof(dummy_csum)); 2174b47820edSDaeho Jeong offset += sizeof(dummy_csum); 2175b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 2176b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 2177b47820edSDaeho Jeong sbi->s_desc_size - offset); 2178feb0ab32SDarrick J. Wong 2179feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2180feb0ab32SDarrick J. Wong goto out; 2181feb0ab32SDarrick J. Wong } 2182feb0ab32SDarrick J. Wong 2183feb0ab32SDarrick J. Wong /* old crc16 code */ 2184e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 2185813d32f9SDarrick J. Wong return 0; 2186813d32f9SDarrick J. Wong 2187717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2188717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2189717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2190717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2191717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2192e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 2193717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2194717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2195717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2196717d50e4SAndreas Dilger offset); 2197717d50e4SAndreas Dilger 2198feb0ab32SDarrick J. Wong out: 2199717d50e4SAndreas Dilger return cpu_to_le16(crc); 2200717d50e4SAndreas Dilger } 2201717d50e4SAndreas Dilger 2202feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2203717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2204717d50e4SAndreas Dilger { 2205feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2206e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 2207717d50e4SAndreas Dilger return 0; 2208717d50e4SAndreas Dilger 2209717d50e4SAndreas Dilger return 1; 2210717d50e4SAndreas Dilger } 2211717d50e4SAndreas Dilger 2212feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2213feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2214feb0ab32SDarrick J. Wong { 2215feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2216feb0ab32SDarrick J. Wong return; 2217e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 2218feb0ab32SDarrick J. Wong } 2219feb0ab32SDarrick J. Wong 2220ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2221bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2222829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 2223bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2224ac27a0ecSDave Kleikamp { 2225617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2226617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2227617ba13bSMingming Cao ext4_fsblk_t last_block; 2228bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2229bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2230bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2231ce421581SJose R. Santos int flexbg_flag = 0; 2232bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2233ac27a0ecSDave Kleikamp 2234e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 2235ce421581SJose R. Santos flexbg_flag = 1; 2236ce421581SJose R. Santos 2237617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2238ac27a0ecSDave Kleikamp 2239197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2240197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2241197cd65aSAkinobu Mita 2242ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2243bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2244ac27a0ecSDave Kleikamp else 2245ac27a0ecSDave Kleikamp last_block = first_block + 2246617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2247ac27a0ecSDave Kleikamp 2248bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2249bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2250bfff6873SLukas Czerner grp = i; 2251bfff6873SLukas Czerner 22528fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 2253829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 2254829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2255829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 2256829fa70dSTheodore Ts'o "superblock", i); 2257829fa70dSTheodore Ts'o } 22582b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2259b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2260a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2261b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2262ac27a0ecSDave Kleikamp return 0; 2263ac27a0ecSDave Kleikamp } 22648fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 2265829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 2266829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2267829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 2268829fa70dSTheodore Ts'o "superblock", i); 2269829fa70dSTheodore Ts'o } 22702b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2271b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2272a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2273b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2274ac27a0ecSDave Kleikamp return 0; 2275ac27a0ecSDave Kleikamp } 22768fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2277829fa70dSTheodore Ts'o if (inode_table == sb_block) { 2278829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2279829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 2280829fa70dSTheodore Ts'o "superblock", i); 2281829fa70dSTheodore Ts'o } 2282bd81d8eeSLaurent Vivier if (inode_table < first_block || 22832b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2284b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2285a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2286b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2287ac27a0ecSDave Kleikamp return 0; 2288ac27a0ecSDave Kleikamp } 2289955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2290feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2291b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2292b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2293e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 2294fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 22957ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2296955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2297717d50e4SAndreas Dilger return 0; 2298717d50e4SAndreas Dilger } 22997ee1ec4cSLi Zefan } 2300955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2301ce421581SJose R. Santos if (!flexbg_flag) 2302617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2303ac27a0ecSDave Kleikamp } 2304bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2305bfff6873SLukas Czerner *first_not_zeroed = grp; 2306ac27a0ecSDave Kleikamp return 1; 2307ac27a0ecSDave Kleikamp } 2308ac27a0ecSDave Kleikamp 2309617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2310ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2311ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2312ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2313ac27a0ecSDave Kleikamp * 2314ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2315ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2316ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2317ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2318ac27a0ecSDave Kleikamp * 2319ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2320ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2321ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2322617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2323ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2324ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2325ac27a0ecSDave Kleikamp */ 2326617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2327617ba13bSMingming Cao struct ext4_super_block *es) 2328ac27a0ecSDave Kleikamp { 2329ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2330ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2331ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2332ac27a0ecSDave Kleikamp int i; 2333ac27a0ecSDave Kleikamp #endif 2334ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2335ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2336ac27a0ecSDave Kleikamp return; 2337ac27a0ecSDave Kleikamp } 2338ac27a0ecSDave Kleikamp 2339a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2340b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2341b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2342a8f48a95SEric Sandeen return; 2343a8f48a95SEric Sandeen } 2344a8f48a95SEric Sandeen 2345d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2346d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2347d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2348d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2349d39195c3SAmir Goldstein return; 2350d39195c3SAmir Goldstein } 2351d39195c3SAmir Goldstein 2352617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2353c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 2354c25f9bc6SEric Sandeen if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { 235584474976SDmitry Monakhov ext4_msg(sb, KERN_INFO, "Errors on filesystem, " 2356ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2357ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2358c25f9bc6SEric Sandeen } 2359ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2360ac27a0ecSDave Kleikamp return; 2361ac27a0ecSDave Kleikamp } 2362ac27a0ecSDave Kleikamp 2363ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2364b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2365ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2366ac27a0ecSDave Kleikamp } 2367ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2368ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2369ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2370ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2371a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2372617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2373617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2374ac27a0ecSDave Kleikamp if (ret < 0) 2375b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2376b31e1552SEric Sandeen "Cannot turn on journaled " 2377b31e1552SEric Sandeen "quota: error %d", ret); 2378ac27a0ecSDave Kleikamp } 2379ac27a0ecSDave Kleikamp } 2380ac27a0ecSDave Kleikamp #endif 2381ac27a0ecSDave Kleikamp 2382ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2383ac27a0ecSDave Kleikamp struct inode *inode; 2384ac27a0ecSDave Kleikamp 2385c65d5c6cSVegard Nossum /* 2386c65d5c6cSVegard Nossum * We may have encountered an error during cleanup; if 2387c65d5c6cSVegard Nossum * so, skip the rest. 2388c65d5c6cSVegard Nossum */ 2389c65d5c6cSVegard Nossum if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2390c65d5c6cSVegard Nossum jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2391c65d5c6cSVegard Nossum es->s_last_orphan = 0; 2392c65d5c6cSVegard Nossum break; 2393c65d5c6cSVegard Nossum } 2394c65d5c6cSVegard Nossum 239597bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 239697bd42b9SJosef Bacik if (IS_ERR(inode)) { 2397ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2398ac27a0ecSDave Kleikamp break; 2399ac27a0ecSDave Kleikamp } 2400ac27a0ecSDave Kleikamp 2401617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2402871a2931SChristoph Hellwig dquot_initialize(inode); 2403ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2404566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2405b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2406b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 240746e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2408e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2409ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 24105955102cSAl Viro inode_lock(inode); 241155f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 2412617ba13bSMingming Cao ext4_truncate(inode); 24135955102cSAl Viro inode_unlock(inode); 2414ac27a0ecSDave Kleikamp nr_truncates++; 2415ac27a0ecSDave Kleikamp } else { 2416566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2417b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2418b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 241946e665e9SHarvey Harrison __func__, inode->i_ino); 2420ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2421ac27a0ecSDave Kleikamp inode->i_ino); 2422ac27a0ecSDave Kleikamp nr_orphans++; 2423ac27a0ecSDave Kleikamp } 2424ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2425ac27a0ecSDave Kleikamp } 2426ac27a0ecSDave Kleikamp 2427ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2428ac27a0ecSDave Kleikamp 2429ac27a0ecSDave Kleikamp if (nr_orphans) 2430b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2431b31e1552SEric Sandeen PLURAL(nr_orphans)); 2432ac27a0ecSDave Kleikamp if (nr_truncates) 2433b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2434b31e1552SEric Sandeen PLURAL(nr_truncates)); 2435ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2436ac27a0ecSDave Kleikamp /* Turn quotas off */ 2437a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2438ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2439287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2440ac27a0ecSDave Kleikamp } 2441ac27a0ecSDave Kleikamp #endif 2442ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2443ac27a0ecSDave Kleikamp } 24440b8e58a1SAndreas Dilger 2445cd2291a4SEric Sandeen /* 2446cd2291a4SEric Sandeen * Maximal extent format file size. 2447cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2448cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2449cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2450cd2291a4SEric Sandeen * so that won't be a limiting factor. 2451cd2291a4SEric Sandeen * 2452f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2453f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2454f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2455f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2456f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2457f17722f9SLukas Czerner * 2458cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2459cd2291a4SEric Sandeen */ 2460f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2461cd2291a4SEric Sandeen { 2462cd2291a4SEric Sandeen loff_t res; 2463cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2464cd2291a4SEric Sandeen 2465cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2466f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2467cd2291a4SEric Sandeen /* 246890c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2469cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2470cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2471cd2291a4SEric Sandeen */ 2472cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2473cd2291a4SEric Sandeen 2474cd2291a4SEric Sandeen /* total blocks in file system block size */ 2475cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2476cd2291a4SEric Sandeen upper_limit <<= blkbits; 2477cd2291a4SEric Sandeen } 2478cd2291a4SEric Sandeen 2479f17722f9SLukas Czerner /* 2480f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2481f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2482f17722f9SLukas Czerner * size 2483f17722f9SLukas Czerner */ 2484f17722f9SLukas Czerner res = (1LL << 32) - 1; 2485cd2291a4SEric Sandeen res <<= blkbits; 2486cd2291a4SEric Sandeen 2487cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2488cd2291a4SEric Sandeen if (res > upper_limit) 2489cd2291a4SEric Sandeen res = upper_limit; 2490cd2291a4SEric Sandeen 2491cd2291a4SEric Sandeen return res; 2492cd2291a4SEric Sandeen } 2493ac27a0ecSDave Kleikamp 2494ac27a0ecSDave Kleikamp /* 2495cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 24960fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 24970fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2498ac27a0ecSDave Kleikamp */ 2499f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2500ac27a0ecSDave Kleikamp { 2501617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 25020fc1b451SAneesh Kumar K.V int meta_blocks; 25030fc1b451SAneesh Kumar K.V loff_t upper_limit; 25040b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 25050b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 25060b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 25070b8e58a1SAndreas Dilger * 25080b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 25090b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 25100fc1b451SAneesh Kumar K.V */ 25110fc1b451SAneesh Kumar K.V 2512f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 25130fc1b451SAneesh Kumar K.V /* 251490c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 25150b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 25160b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 25170fc1b451SAneesh Kumar K.V */ 25180fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 25190fc1b451SAneesh Kumar K.V 25200fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 25210fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 25220fc1b451SAneesh Kumar K.V 25230fc1b451SAneesh Kumar K.V } else { 25248180a562SAneesh Kumar K.V /* 25258180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 25268180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 25278180a562SAneesh Kumar K.V * represent total number of blocks in 25288180a562SAneesh Kumar K.V * file system block size 25298180a562SAneesh Kumar K.V */ 25300fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 25310fc1b451SAneesh Kumar K.V 25320fc1b451SAneesh Kumar K.V } 25330fc1b451SAneesh Kumar K.V 25340fc1b451SAneesh Kumar K.V /* indirect blocks */ 25350fc1b451SAneesh Kumar K.V meta_blocks = 1; 25360fc1b451SAneesh Kumar K.V /* double indirect blocks */ 25370fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 25380fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 25390fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 25400fc1b451SAneesh Kumar K.V 25410fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 25420fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2543ac27a0ecSDave Kleikamp 2544ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2545ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2546ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2547ac27a0ecSDave Kleikamp res <<= bits; 2548ac27a0ecSDave Kleikamp if (res > upper_limit) 2549ac27a0ecSDave Kleikamp res = upper_limit; 25500fc1b451SAneesh Kumar K.V 25510fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 25520fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 25530fc1b451SAneesh Kumar K.V 2554ac27a0ecSDave Kleikamp return res; 2555ac27a0ecSDave Kleikamp } 2556ac27a0ecSDave Kleikamp 2557617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 255870bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2559ac27a0ecSDave Kleikamp { 2560617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2561fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2562ac27a0ecSDave Kleikamp int has_super = 0; 2563ac27a0ecSDave Kleikamp 2564ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2565ac27a0ecSDave Kleikamp 2566e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 256770bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2568ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2569617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2570ac27a0ecSDave Kleikamp has_super = 1; 25710b8e58a1SAndreas Dilger 2572bd63f6b0SDarrick J. Wong /* 2573bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 2574bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 2575bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 2576bd63f6b0SDarrick J. Wong * compensate. 2577bd63f6b0SDarrick J. Wong */ 2578bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 2579bd63f6b0SDarrick J. Wong le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) 2580bd63f6b0SDarrick J. Wong has_super++; 2581bd63f6b0SDarrick J. Wong 2582617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2583ac27a0ecSDave Kleikamp } 2584ac27a0ecSDave Kleikamp 2585c9de560dSAlex Tomas /** 2586c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2587c9de560dSAlex Tomas * @sbi: In memory super block info 2588c9de560dSAlex Tomas * 2589c9de560dSAlex Tomas * If we have specified it via mount option, then 2590c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2591c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2592c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2593c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2594c9de560dSAlex Tomas * 2595c9de560dSAlex Tomas */ 2596c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2597c9de560dSAlex Tomas { 2598c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2599c9de560dSAlex Tomas unsigned long stripe_width = 2600c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 26013eb08658SDan Ehrenberg int ret; 2602c9de560dSAlex Tomas 2603c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 26043eb08658SDan Ehrenberg ret = sbi->s_stripe; 26053eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 26063eb08658SDan Ehrenberg ret = stripe_width; 26073eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 26083eb08658SDan Ehrenberg ret = stride; 26093eb08658SDan Ehrenberg else 26103eb08658SDan Ehrenberg ret = 0; 2611c9de560dSAlex Tomas 26123eb08658SDan Ehrenberg /* 26133eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 26143eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 26153eb08658SDan Ehrenberg */ 26163eb08658SDan Ehrenberg if (ret <= 1) 26173eb08658SDan Ehrenberg ret = 0; 2618c9de560dSAlex Tomas 26193eb08658SDan Ehrenberg return ret; 2620c9de560dSAlex Tomas } 2621ac27a0ecSDave Kleikamp 2622a13fb1a4SEric Sandeen /* 2623a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2624a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2625a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2626a13fb1a4SEric Sandeen * 0 if it cannot be. 2627a13fb1a4SEric Sandeen */ 2628a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2629a13fb1a4SEric Sandeen { 2630e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 2631a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2632a13fb1a4SEric Sandeen "Couldn't mount because of " 2633a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2634a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2635a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2636a13fb1a4SEric Sandeen return 0; 2637a13fb1a4SEric Sandeen } 2638a13fb1a4SEric Sandeen 2639a13fb1a4SEric Sandeen if (readonly) 2640a13fb1a4SEric Sandeen return 1; 2641a13fb1a4SEric Sandeen 2642e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 26432cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 26442cb5cc8bSDarrick J. Wong sb->s_flags |= MS_RDONLY; 26452cb5cc8bSDarrick J. Wong return 1; 26462cb5cc8bSDarrick J. Wong } 26472cb5cc8bSDarrick J. Wong 2648a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2649e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 2650a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2651a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2652a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2653a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2654a13fb1a4SEric Sandeen return 0; 2655a13fb1a4SEric Sandeen } 2656a13fb1a4SEric Sandeen /* 2657a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2658a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2659a13fb1a4SEric Sandeen */ 2660e2b911c5SDarrick J. Wong if (ext4_has_feature_huge_file(sb)) { 2661a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2662a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2663a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2664a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2665a13fb1a4SEric Sandeen return 0; 2666a13fb1a4SEric Sandeen } 2667a13fb1a4SEric Sandeen } 2668e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 2669bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2670bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2671bab08ab9STheodore Ts'o "extents feature\n"); 2672bab08ab9STheodore Ts'o return 0; 2673bab08ab9STheodore Ts'o } 26747c319d32SAditya Kali 26757c319d32SAditya Kali #ifndef CONFIG_QUOTA 2676e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) && !readonly) { 26777c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 26787c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 26797c319d32SAditya Kali "without CONFIG_QUOTA"); 26807c319d32SAditya Kali return 0; 26817c319d32SAditya Kali } 2682689c958cSLi Xi if (ext4_has_feature_project(sb) && !readonly) { 2683689c958cSLi Xi ext4_msg(sb, KERN_ERR, 2684689c958cSLi Xi "Filesystem with project quota feature cannot be mounted RDWR " 2685689c958cSLi Xi "without CONFIG_QUOTA"); 2686689c958cSLi Xi return 0; 2687689c958cSLi Xi } 26887c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2689a13fb1a4SEric Sandeen return 1; 2690a13fb1a4SEric Sandeen } 2691a13fb1a4SEric Sandeen 269266e61a9eSTheodore Ts'o /* 269366e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 269466e61a9eSTheodore Ts'o * on the file system 269566e61a9eSTheodore Ts'o */ 269666e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 269766e61a9eSTheodore Ts'o { 269866e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 269966e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 270066e61a9eSTheodore Ts'o struct ext4_super_block *es; 270166e61a9eSTheodore Ts'o 270266e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 270366e61a9eSTheodore Ts'o es = sbi->s_es; 270466e61a9eSTheodore Ts'o 270566e61a9eSTheodore Ts'o if (es->s_error_count) 2706ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 2707ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 270866e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 270966e61a9eSTheodore Ts'o if (es->s_first_error_time) { 2710ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", 271166e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 271266e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 271366e61a9eSTheodore Ts'o es->s_first_error_func, 271466e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 271566e61a9eSTheodore Ts'o if (es->s_first_error_ino) 271666e61a9eSTheodore Ts'o printk(": inode %u", 271766e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 271866e61a9eSTheodore Ts'o if (es->s_first_error_block) 271966e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 272066e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 272166e61a9eSTheodore Ts'o printk("\n"); 272266e61a9eSTheodore Ts'o } 272366e61a9eSTheodore Ts'o if (es->s_last_error_time) { 2724ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", 272566e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 272666e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 272766e61a9eSTheodore Ts'o es->s_last_error_func, 272866e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 272966e61a9eSTheodore Ts'o if (es->s_last_error_ino) 273066e61a9eSTheodore Ts'o printk(": inode %u", 273166e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 273266e61a9eSTheodore Ts'o if (es->s_last_error_block) 273366e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 273466e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 273566e61a9eSTheodore Ts'o printk("\n"); 273666e61a9eSTheodore Ts'o } 273766e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 273866e61a9eSTheodore Ts'o } 273966e61a9eSTheodore Ts'o 2740bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2741bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2742bfff6873SLukas Czerner { 2743bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2744bfff6873SLukas Czerner ext4_group_t group, ngroups; 2745bfff6873SLukas Czerner struct super_block *sb; 2746bfff6873SLukas Czerner unsigned long timeout = 0; 2747bfff6873SLukas Czerner int ret = 0; 2748bfff6873SLukas Czerner 2749bfff6873SLukas Czerner sb = elr->lr_super; 2750bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2751bfff6873SLukas Czerner 27528e8ad8a5SJan Kara sb_start_write(sb); 2753bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2754bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2755bfff6873SLukas Czerner if (!gdp) { 2756bfff6873SLukas Czerner ret = 1; 2757bfff6873SLukas Czerner break; 2758bfff6873SLukas Czerner } 2759bfff6873SLukas Czerner 2760bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2761bfff6873SLukas Czerner break; 2762bfff6873SLukas Czerner } 2763bfff6873SLukas Czerner 27647f511862STheodore Ts'o if (group >= ngroups) 2765bfff6873SLukas Czerner ret = 1; 2766bfff6873SLukas Czerner 2767bfff6873SLukas Czerner if (!ret) { 2768bfff6873SLukas Czerner timeout = jiffies; 2769bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2770bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2771bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 277251ce6511SLukas Czerner timeout = (jiffies - timeout) * 277351ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2774bfff6873SLukas Czerner elr->lr_timeout = timeout; 2775bfff6873SLukas Czerner } 2776bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2777bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2778bfff6873SLukas Czerner } 27798e8ad8a5SJan Kara sb_end_write(sb); 2780bfff6873SLukas Czerner 2781bfff6873SLukas Czerner return ret; 2782bfff6873SLukas Czerner } 2783bfff6873SLukas Czerner 2784bfff6873SLukas Czerner /* 2785bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 27864ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2787bfff6873SLukas Czerner */ 2788bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2789bfff6873SLukas Czerner { 2790bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2791bfff6873SLukas Czerner 2792bfff6873SLukas Czerner if (!elr) 2793bfff6873SLukas Czerner return; 2794bfff6873SLukas Czerner 2795bfff6873SLukas Czerner sbi = elr->lr_sbi; 2796bfff6873SLukas Czerner 2797bfff6873SLukas Czerner list_del(&elr->lr_request); 2798bfff6873SLukas Czerner sbi->s_li_request = NULL; 2799bfff6873SLukas Czerner kfree(elr); 2800bfff6873SLukas Czerner } 2801bfff6873SLukas Czerner 2802bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2803bfff6873SLukas Czerner { 28041bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 28051bb933fbSLukas Czerner if (!ext4_li_info) { 28061bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2807bfff6873SLukas Czerner return; 28081bb933fbSLukas Czerner } 2809bfff6873SLukas Czerner 2810bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 28111bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2812bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 28131bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2814bfff6873SLukas Czerner } 2815bfff6873SLukas Czerner 28168f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 28178f1f7453SEric Sandeen 2818bfff6873SLukas Czerner /* 2819bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2820bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2821bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2822bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2823bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2824bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2825bfff6873SLukas Czerner * next waking time and put itself into sleep. 2826bfff6873SLukas Czerner */ 2827bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2828bfff6873SLukas Czerner { 2829bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2830bfff6873SLukas Czerner struct list_head *pos, *n; 2831bfff6873SLukas Czerner struct ext4_li_request *elr; 28324ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2833bfff6873SLukas Czerner 2834bfff6873SLukas Czerner BUG_ON(NULL == eli); 2835bfff6873SLukas Czerner 2836bfff6873SLukas Czerner cont_thread: 2837bfff6873SLukas Czerner while (true) { 2838bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2839bfff6873SLukas Czerner 2840bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2841bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2842bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2843bfff6873SLukas Czerner goto exit_thread; 2844bfff6873SLukas Czerner } 2845bfff6873SLukas Czerner 2846bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2847bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2848bfff6873SLukas Czerner lr_request); 2849bfff6873SLukas Czerner 2850b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2851b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2852b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2853bfff6873SLukas Czerner ext4_remove_li_request(elr); 2854bfff6873SLukas Czerner continue; 2855bfff6873SLukas Czerner } 2856b2c78cd0STheodore Ts'o } 2857bfff6873SLukas Czerner 2858bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2859bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2860bfff6873SLukas Czerner } 2861bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2862bfff6873SLukas Czerner 2863a0acae0eSTejun Heo try_to_freeze(); 2864bfff6873SLukas Czerner 28654ed5c033SLukas Czerner cur = jiffies; 28664ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2867f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2868bfff6873SLukas Czerner cond_resched(); 2869bfff6873SLukas Czerner continue; 2870bfff6873SLukas Czerner } 2871bfff6873SLukas Czerner 28724ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 28734ed5c033SLukas Czerner 28748f1f7453SEric Sandeen if (kthread_should_stop()) { 28758f1f7453SEric Sandeen ext4_clear_request_list(); 28768f1f7453SEric Sandeen goto exit_thread; 28778f1f7453SEric Sandeen } 2878bfff6873SLukas Czerner } 2879bfff6873SLukas Czerner 2880bfff6873SLukas Czerner exit_thread: 2881bfff6873SLukas Czerner /* 2882bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2883bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2884bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2885bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2886bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2887bfff6873SLukas Czerner * new one. 2888bfff6873SLukas Czerner */ 2889bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2890bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2891bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 2892bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2893bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2894bfff6873SLukas Czerner goto cont_thread; 2895bfff6873SLukas Czerner } 2896bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2897bfff6873SLukas Czerner kfree(ext4_li_info); 2898bfff6873SLukas Czerner ext4_li_info = NULL; 2899bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2900bfff6873SLukas Czerner 2901bfff6873SLukas Czerner return 0; 2902bfff6873SLukas Czerner } 2903bfff6873SLukas Czerner 2904bfff6873SLukas Czerner static void ext4_clear_request_list(void) 2905bfff6873SLukas Czerner { 2906bfff6873SLukas Czerner struct list_head *pos, *n; 2907bfff6873SLukas Czerner struct ext4_li_request *elr; 2908bfff6873SLukas Czerner 2909bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2910bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 2911bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2912bfff6873SLukas Czerner lr_request); 2913bfff6873SLukas Czerner ext4_remove_li_request(elr); 2914bfff6873SLukas Czerner } 2915bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2916bfff6873SLukas Czerner } 2917bfff6873SLukas Czerner 2918bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 2919bfff6873SLukas Czerner { 29208f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 29218f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 29228f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 29238f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 2924bfff6873SLukas Czerner ext4_clear_request_list(); 2925bfff6873SLukas Czerner kfree(ext4_li_info); 2926bfff6873SLukas Czerner ext4_li_info = NULL; 292792b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 2928bfff6873SLukas Czerner "initialization thread\n", 2929bfff6873SLukas Czerner err); 2930bfff6873SLukas Czerner return err; 2931bfff6873SLukas Czerner } 2932bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 2933bfff6873SLukas Czerner return 0; 2934bfff6873SLukas Czerner } 2935bfff6873SLukas Czerner 2936bfff6873SLukas Czerner /* 2937bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 2938bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 2939bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 2940bfff6873SLukas Czerner * groups and return total number of groups. 2941bfff6873SLukas Czerner */ 2942bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 2943bfff6873SLukas Czerner { 2944bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 2945bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2946bfff6873SLukas Czerner 2947bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 2948bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2949bfff6873SLukas Czerner if (!gdp) 2950bfff6873SLukas Czerner continue; 2951bfff6873SLukas Czerner 2952bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2953bfff6873SLukas Czerner break; 2954bfff6873SLukas Czerner } 2955bfff6873SLukas Czerner 2956bfff6873SLukas Czerner return group; 2957bfff6873SLukas Czerner } 2958bfff6873SLukas Czerner 2959bfff6873SLukas Czerner static int ext4_li_info_new(void) 2960bfff6873SLukas Czerner { 2961bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 2962bfff6873SLukas Czerner 2963bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 2964bfff6873SLukas Czerner if (!eli) 2965bfff6873SLukas Czerner return -ENOMEM; 2966bfff6873SLukas Czerner 2967bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 2968bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 2969bfff6873SLukas Czerner 2970bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 2971bfff6873SLukas Czerner 2972bfff6873SLukas Czerner ext4_li_info = eli; 2973bfff6873SLukas Czerner 2974bfff6873SLukas Czerner return 0; 2975bfff6873SLukas Czerner } 2976bfff6873SLukas Czerner 2977bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 2978bfff6873SLukas Czerner ext4_group_t start) 2979bfff6873SLukas Czerner { 2980bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2981bfff6873SLukas Czerner struct ext4_li_request *elr; 2982bfff6873SLukas Czerner 2983bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 2984bfff6873SLukas Czerner if (!elr) 2985bfff6873SLukas Czerner return NULL; 2986bfff6873SLukas Czerner 2987bfff6873SLukas Czerner elr->lr_super = sb; 2988bfff6873SLukas Czerner elr->lr_sbi = sbi; 2989bfff6873SLukas Czerner elr->lr_next_group = start; 2990bfff6873SLukas Czerner 2991bfff6873SLukas Czerner /* 2992bfff6873SLukas Czerner * Randomize first schedule time of the request to 2993bfff6873SLukas Czerner * spread the inode table initialization requests 2994bfff6873SLukas Czerner * better. 2995bfff6873SLukas Czerner */ 2996dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 2997dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 2998bfff6873SLukas Czerner return elr; 2999bfff6873SLukas Czerner } 3000bfff6873SLukas Czerner 30017f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3002bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3003bfff6873SLukas Czerner { 3004bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 30057f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 3006bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 30076c5a6cb9SAndrew Morton int ret = 0; 3008bfff6873SLukas Czerner 30097f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 301051ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 301151ce6511SLukas Czerner /* 301251ce6511SLukas Czerner * Reset timeout so it can be computed again, because 301351ce6511SLukas Czerner * s_li_wait_mult might have changed. 301451ce6511SLukas Czerner */ 301551ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 30167f511862STheodore Ts'o goto out; 301751ce6511SLukas Czerner } 3018bfff6873SLukas Czerner 3019bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 3020bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 302155ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 30227f511862STheodore Ts'o goto out; 3023bfff6873SLukas Czerner 3024bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 30257f511862STheodore Ts'o if (!elr) { 30267f511862STheodore Ts'o ret = -ENOMEM; 30277f511862STheodore Ts'o goto out; 30287f511862STheodore Ts'o } 3029bfff6873SLukas Czerner 3030bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3031bfff6873SLukas Czerner ret = ext4_li_info_new(); 3032bfff6873SLukas Czerner if (ret) 3033bfff6873SLukas Czerner goto out; 3034bfff6873SLukas Czerner } 3035bfff6873SLukas Czerner 3036bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3037bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3038bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3039bfff6873SLukas Czerner 3040bfff6873SLukas Czerner sbi->s_li_request = elr; 304146e4690bSTao Ma /* 304246e4690bSTao Ma * set elr to NULL here since it has been inserted to 304346e4690bSTao Ma * the request_list and the removal and free of it is 304446e4690bSTao Ma * handled by ext4_clear_request_list from now on. 304546e4690bSTao Ma */ 304646e4690bSTao Ma elr = NULL; 3047bfff6873SLukas Czerner 3048bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3049bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3050bfff6873SLukas Czerner if (ret) 3051bfff6873SLukas Czerner goto out; 3052bfff6873SLukas Czerner } 3053bfff6873SLukas Czerner out: 3054bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3055beed5ecbSNicolas Kaiser if (ret) 3056bfff6873SLukas Czerner kfree(elr); 3057bfff6873SLukas Czerner return ret; 3058bfff6873SLukas Czerner } 3059bfff6873SLukas Czerner 3060bfff6873SLukas Czerner /* 3061bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3062bfff6873SLukas Czerner * module unload. 3063bfff6873SLukas Czerner */ 3064bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3065bfff6873SLukas Czerner { 3066bfff6873SLukas Czerner /* 3067bfff6873SLukas Czerner * If thread exited earlier 3068bfff6873SLukas Czerner * there's nothing to be done. 3069bfff6873SLukas Czerner */ 30708f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3071bfff6873SLukas Czerner return; 3072bfff6873SLukas Czerner 30738f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3074bfff6873SLukas Czerner } 3075bfff6873SLukas Czerner 307625ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 307725ed6e8aSDarrick J. Wong { 307825ed6e8aSDarrick J. Wong int ret = 1; 307925ed6e8aSDarrick J. Wong int compat, incompat; 308025ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 308125ed6e8aSDarrick J. Wong 30829aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 3083db9ee220SDarrick J. Wong /* journal checksum v3 */ 308425ed6e8aSDarrick J. Wong compat = 0; 3085db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 308625ed6e8aSDarrick J. Wong } else { 308725ed6e8aSDarrick J. Wong /* journal checksum v1 */ 308825ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 308925ed6e8aSDarrick J. Wong incompat = 0; 309025ed6e8aSDarrick J. Wong } 309125ed6e8aSDarrick J. Wong 3092feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 3093feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3094feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 3095feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 309625ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 309725ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 309825ed6e8aSDarrick J. Wong compat, 0, 309925ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 310025ed6e8aSDarrick J. Wong incompat); 310125ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 310225ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 310325ed6e8aSDarrick J. Wong compat, 0, 310425ed6e8aSDarrick J. Wong incompat); 310525ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 310625ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 310725ed6e8aSDarrick J. Wong } else { 3108feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3109feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 311025ed6e8aSDarrick J. Wong } 311125ed6e8aSDarrick J. Wong 311225ed6e8aSDarrick J. Wong return ret; 311325ed6e8aSDarrick J. Wong } 311425ed6e8aSDarrick J. Wong 3115952fc18eSTheodore Ts'o /* 3116952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3117952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3118952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3119952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3120952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3121952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3122952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3123952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3124952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3125952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3126952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3127952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3128952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3129952fc18eSTheodore Ts'o */ 3130952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3131952fc18eSTheodore Ts'o char *buf) 3132952fc18eSTheodore Ts'o { 3133952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3134952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3135952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3136952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3137952fc18eSTheodore Ts'o int s, j, count = 0; 3138952fc18eSTheodore Ts'o 3139e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 31400548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 31410548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 31420548bbb8STheodore Ts'o 3143952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3144952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3145952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3146952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3147952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3148952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3149952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3150952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3151952fc18eSTheodore Ts'o count++; 3152952fc18eSTheodore Ts'o } 3153952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3154952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3155952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3156952fc18eSTheodore Ts'o count++; 3157952fc18eSTheodore Ts'o } 3158952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3159952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3160952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3161952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3162952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3163952fc18eSTheodore Ts'o count++; 3164952fc18eSTheodore Ts'o } 3165952fc18eSTheodore Ts'o if (i != grp) 3166952fc18eSTheodore Ts'o continue; 3167952fc18eSTheodore Ts'o s = 0; 3168952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3169952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3170952fc18eSTheodore Ts'o count++; 3171952fc18eSTheodore Ts'o } 3172952fc18eSTheodore Ts'o for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { 3173952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3174952fc18eSTheodore Ts'o count++; 3175952fc18eSTheodore Ts'o } 3176952fc18eSTheodore Ts'o } 3177952fc18eSTheodore Ts'o if (!count) 3178952fc18eSTheodore Ts'o return 0; 3179952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3180952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3181952fc18eSTheodore Ts'o } 3182952fc18eSTheodore Ts'o 3183952fc18eSTheodore Ts'o /* 3184952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3185952fc18eSTheodore Ts'o */ 3186952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3187952fc18eSTheodore Ts'o { 3188952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3189952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 3190952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3191952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 31924fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 3193952fc18eSTheodore Ts'o 3194952fc18eSTheodore Ts'o if (!buf) 3195952fc18eSTheodore Ts'o return -ENOMEM; 3196952fc18eSTheodore Ts'o 3197952fc18eSTheodore Ts'o /* 3198952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3199952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3200952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3201952fc18eSTheodore Ts'o */ 3202952fc18eSTheodore Ts'o 3203952fc18eSTheodore Ts'o /* 3204952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3205952fc18eSTheodore Ts'o */ 3206952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3207952fc18eSTheodore Ts'o 3208952fc18eSTheodore Ts'o /* 3209952fc18eSTheodore Ts'o * Add the overhead found in each block group 3210952fc18eSTheodore Ts'o */ 3211952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3212952fc18eSTheodore Ts'o int blks; 3213952fc18eSTheodore Ts'o 3214952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3215952fc18eSTheodore Ts'o overhead += blks; 3216952fc18eSTheodore Ts'o if (blks) 3217952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3218952fc18eSTheodore Ts'o cond_resched(); 3219952fc18eSTheodore Ts'o } 3220b003b524SEric Sandeen /* Add the internal journal blocks as well */ 3221b003b524SEric Sandeen if (sbi->s_journal && !sbi->journal_bdev) 3222810da240SLukas Czerner overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); 32230875a2b4SEric Sandeen 3224952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3225952fc18eSTheodore Ts'o smp_wmb(); 3226952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3227952fc18eSTheodore Ts'o return 0; 3228952fc18eSTheodore Ts'o } 3229952fc18eSTheodore Ts'o 3230b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 323127dd4385SLukas Czerner { 323227dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 3233b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 323427dd4385SLukas Czerner 323527dd4385SLukas Czerner /* 323630fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 323730fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 323830fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 323930fac0f7SJan Kara * to keep ext2/3 backward compatibility. 324030fac0f7SJan Kara */ 3241e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 3242b5799018STheodore Ts'o return; 324330fac0f7SJan Kara /* 324427dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 324527dd4385SLukas Czerner * This should cover the situations where we can not afford to run 324627dd4385SLukas Czerner * out of space like for example punch hole, or converting 3247556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 324827dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 324927dd4385SLukas Czerner * very rare. 325027dd4385SLukas Czerner */ 3251b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 3252b5799018STheodore Ts'o sbi->s_cluster_bits); 325327dd4385SLukas Czerner 325427dd4385SLukas Czerner do_div(resv_clusters, 50); 325527dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 325627dd4385SLukas Czerner 3257b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 325827dd4385SLukas Czerner } 325927dd4385SLukas Czerner 3260617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3261ac27a0ecSDave Kleikamp { 3262d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3263ac27a0ecSDave Kleikamp struct buffer_head *bh; 3264617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3265617ba13bSMingming Cao struct ext4_sb_info *sbi; 3266617ba13bSMingming Cao ext4_fsblk_t block; 3267617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 326870bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3269ac27a0ecSDave Kleikamp unsigned long offset = 0; 3270ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3271ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3272ac27a0ecSDave Kleikamp struct inode *root; 32730390131bSFrank Mayhar const char *descr; 3274dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3275281b5995STheodore Ts'o int blocksize, clustersize; 32764ec11028STheodore Ts'o unsigned int db_count; 32774ec11028STheodore Ts'o unsigned int i; 3278281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3279bd81d8eeSLaurent Vivier __u64 blocks_count; 328007aa2ea1SLukas Czerner int err = 0; 3281b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3282bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3283ac27a0ecSDave Kleikamp 3284ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3285ac27a0ecSDave Kleikamp if (!sbi) 3286dcc7dae3SCyrill Gorcunov goto out_free_orig; 3287705895b6SPekka Enberg 3288705895b6SPekka Enberg sbi->s_blockgroup_lock = 3289705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3290705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3291705895b6SPekka Enberg kfree(sbi); 3292dcc7dae3SCyrill Gorcunov goto out_free_orig; 3293705895b6SPekka Enberg } 3294ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 32952c0544b2STheodore Ts'o sbi->s_sb = sb; 3296240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3297d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3298f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3299f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3300f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3301ac27a0ecSDave Kleikamp 33029f6200bbSTheodore Ts'o /* Cleanup superblock name */ 3303ec3904dcSRasmus Villemoes strreplace(sb->s_id, '/', '!'); 33049f6200bbSTheodore Ts'o 330507aa2ea1SLukas Czerner /* -EINVAL is default */ 3306dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3307617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3308ac27a0ecSDave Kleikamp if (!blocksize) { 3309b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3310ac27a0ecSDave Kleikamp goto out_fail; 3311ac27a0ecSDave Kleikamp } 3312ac27a0ecSDave Kleikamp 3313ac27a0ecSDave Kleikamp /* 3314617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3315ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3316ac27a0ecSDave Kleikamp */ 3317617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 331870bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 331970bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3320ac27a0ecSDave Kleikamp } else { 332170bbb3e0SAndrew Morton logical_sb_block = sb_block; 3322ac27a0ecSDave Kleikamp } 3323ac27a0ecSDave Kleikamp 3324a8ac900bSGioh Kim if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { 3325b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3326ac27a0ecSDave Kleikamp goto out_fail; 3327ac27a0ecSDave Kleikamp } 3328ac27a0ecSDave Kleikamp /* 3329ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3330617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3331ac27a0ecSDave Kleikamp */ 33322716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3333ac27a0ecSDave Kleikamp sbi->s_es = es; 3334ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3335617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3336617ba13bSMingming Cao goto cantfind_ext4; 3337afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3338ac27a0ecSDave Kleikamp 3339feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3340e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 3341e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 3342363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 3343feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3344feb0ab32SDarrick J. Wong 3345d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3346d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3347d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3348d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3349d25425f8SDarrick J. Wong silent = 1; 3350d25425f8SDarrick J. Wong goto cantfind_ext4; 3351d25425f8SDarrick J. Wong } 3352d25425f8SDarrick J. Wong 33530441984aSDarrick J. Wong /* Load the checksum driver */ 3354e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb)) { 33550441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 33560441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 33570441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 33580441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 33590441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 33600441984aSDarrick J. Wong goto failed_mount; 33610441984aSDarrick J. Wong } 33620441984aSDarrick J. Wong } 33630441984aSDarrick J. Wong 3364a9c47317SDarrick J. Wong /* Check superblock checksum */ 3365a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3366a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3367a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3368a9c47317SDarrick J. Wong silent = 1; 33696a797d27SDarrick J. Wong ret = -EFSBADCRC; 3370a9c47317SDarrick J. Wong goto cantfind_ext4; 3371a9c47317SDarrick J. Wong } 3372a9c47317SDarrick J. Wong 3373a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 3374e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 33758c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 33768c81bd8fSDarrick J. Wong else if (ext4_has_metadata_csum(sb)) 3377a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3378a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3379a9c47317SDarrick J. Wong 3380ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3381ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3382fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3383617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3384fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 338587f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3386fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3387617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3388fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3389ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3390fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 339103010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3392fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 33932e7842b8SHugh Dickins #endif 339498c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 339598c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 339698c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 339798c1a759SDarrick J. Wong 3398617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3399fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3400617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3401fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3402617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3403fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3404ac27a0ecSDave Kleikamp 3405617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3406fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3407bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3408fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3409bb4f397aSAneesh Kumar K.V else 3410fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 341145f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 3412fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 34138b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3414fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3415ac27a0ecSDave Kleikamp 341608cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 341708cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 341830773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 341930773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 342030773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3421ac27a0ecSDave Kleikamp 34228b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3423fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3424ac27a0ecSDave Kleikamp 34251e2462f9SMingming Cao /* 3426dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3427dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3428dd919b98SAneesh Kumar K.V */ 3429bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 34308b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3431fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3432dd919b98SAneesh Kumar K.V 343351ce6511SLukas Czerner /* 343451ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 343551ce6511SLukas Czerner * no mount option specified. 343651ce6511SLukas Czerner */ 343751ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 343851ce6511SLukas Czerner 34398b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 3440661aa520SEric Sandeen &journal_devnum, &journal_ioprio, 0)) { 34418b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 34428b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 34438b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 34448b67f04aSTheodore Ts'o } 34455a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3446b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3447661aa520SEric Sandeen &journal_ioprio, 0)) 3448ac27a0ecSDave Kleikamp goto failed_mount; 3449ac27a0ecSDave Kleikamp 345056889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 345156889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 345256889787STheodore Ts'o "with data=journal disables delayed " 345356889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 345456889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 345556889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 345656889787STheodore Ts'o "both data=journal and delalloc"); 345756889787STheodore Ts'o goto failed_mount; 345856889787STheodore Ts'o } 345956889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 346056889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 34616ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 346256889787STheodore Ts'o goto failed_mount; 346356889787STheodore Ts'o } 3464923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 3465923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 3466923ae0ffSRoss Zwisler "both data=journal and dax"); 3467923ae0ffSRoss Zwisler goto failed_mount; 3468923ae0ffSRoss Zwisler } 346956889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 347056889787STheodore Ts'o clear_opt(sb, DELALLOC); 3471001e4a87STejun Heo } else { 3472001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 347356889787STheodore Ts'o } 347456889787STheodore Ts'o 3475ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3476482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3477ac27a0ecSDave Kleikamp 3478617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3479e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 3480e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 3481e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 3482b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3483b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3484b31e1552SEric Sandeen "running e2fsck is recommended"); 3485469108ffSTheodore Tso 3486ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 3487ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 3488e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 3489ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 3490ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 3491ed3654ebSTheodore Ts'o goto failed_mount; 3492ed3654ebSTheodore Ts'o } 3493ed3654ebSTheodore Ts'o } 3494ed3654ebSTheodore Ts'o 34952035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 34962035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 34972035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 34982035e776STheodore Ts'o "using the ext4 subsystem"); 34992035e776STheodore Ts'o else { 35002035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 35012035e776STheodore Ts'o "to feature incompatibilities"); 35022035e776STheodore Ts'o goto failed_mount; 35032035e776STheodore Ts'o } 35042035e776STheodore Ts'o } 35052035e776STheodore Ts'o 35062035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 35072035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 35082035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 35092035e776STheodore Ts'o "using the ext4 subsystem"); 35102035e776STheodore Ts'o else { 35112035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 35122035e776STheodore Ts'o "to feature incompatibilities"); 35132035e776STheodore Ts'o goto failed_mount; 35142035e776STheodore Ts'o } 35152035e776STheodore Ts'o } 35162035e776STheodore Ts'o 3517469108ffSTheodore Tso /* 3518ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3519ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3520ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3521ac27a0ecSDave Kleikamp */ 3522a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3523ac27a0ecSDave Kleikamp goto failed_mount; 3524a13fb1a4SEric Sandeen 3525261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3526617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3527617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3528b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3529b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3530ac27a0ecSDave Kleikamp goto failed_mount; 3531ac27a0ecSDave Kleikamp } 3532ac27a0ecSDave Kleikamp 35335b9554dcSTheodore Ts'o if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { 35345b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 35355b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 35365b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 35375b9554dcSTheodore Ts'o goto failed_mount; 35385b9554dcSTheodore Ts'o } 35395b9554dcSTheodore Ts'o 3540923ae0ffSRoss Zwisler if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { 354187eefeb4SToshi Kani err = bdev_dax_supported(sb, blocksize); 354287eefeb4SToshi Kani if (err) 3543923ae0ffSRoss Zwisler goto failed_mount; 3544923ae0ffSRoss Zwisler } 3545923ae0ffSRoss Zwisler 3546e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 35476ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 35486ddb2447STheodore Ts'o es->s_encryption_level); 35496ddb2447STheodore Ts'o goto failed_mount; 35506ddb2447STheodore Ts'o } 35516ddb2447STheodore Ts'o 3552ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3553ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3554ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3555b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3556ce40733cSAneesh Kumar K.V blocksize); 3557ac27a0ecSDave Kleikamp goto failed_mount; 3558ac27a0ecSDave Kleikamp } 3559ac27a0ecSDave Kleikamp 3560ac27a0ecSDave Kleikamp brelse(bh); 356170bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 356270bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3563a8ac900bSGioh Kim bh = sb_bread_unmovable(sb, logical_sb_block); 3564ac27a0ecSDave Kleikamp if (!bh) { 3565b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3566b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3567ac27a0ecSDave Kleikamp goto failed_mount; 3568ac27a0ecSDave Kleikamp } 35692716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3570ac27a0ecSDave Kleikamp sbi->s_es = es; 3571617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3572b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3573b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3574ac27a0ecSDave Kleikamp goto failed_mount; 3575ac27a0ecSDave Kleikamp } 3576ac27a0ecSDave Kleikamp } 3577ac27a0ecSDave Kleikamp 3578e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 3579f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3580f287a1a5STheodore Ts'o has_huge_files); 3581f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3582ac27a0ecSDave Kleikamp 3583617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3584617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3585617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3586ac27a0ecSDave Kleikamp } else { 3587ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3588ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3589617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 35901330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3591ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3592b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3593b31e1552SEric Sandeen "unsupported inode size: %d", 3594ac27a0ecSDave Kleikamp sbi->s_inode_size); 3595ac27a0ecSDave Kleikamp goto failed_mount; 3596ac27a0ecSDave Kleikamp } 3597ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3598ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3599ac27a0ecSDave Kleikamp } 36000b8e58a1SAndreas Dilger 36010d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 3602e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 36038fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 36040d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3605d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3606b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3607b31e1552SEric Sandeen "unsupported descriptor size %lu", 36080d1ee42fSAlexandre Ratchov sbi->s_desc_size); 36090d1ee42fSAlexandre Ratchov goto failed_mount; 36100d1ee42fSAlexandre Ratchov } 36110d1ee42fSAlexandre Ratchov } else 36120d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 36130b8e58a1SAndreas Dilger 3614ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3615ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3616b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3617617ba13bSMingming Cao goto cantfind_ext4; 36180b8e58a1SAndreas Dilger 3619617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3620ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3621617ba13bSMingming Cao goto cantfind_ext4; 3622ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3623ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 36240d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3625ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3626ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3627e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3628e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 36290b8e58a1SAndreas Dilger 3630ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3631ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3632ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3633e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 3634f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3635f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3636f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3637f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3638f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 363923301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 364023301410STheodore Ts'o es->s_flags |= 364123301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3642f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3643f99b2589STheodore Ts'o #else 364423301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 364523301410STheodore Ts'o es->s_flags |= 364623301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3647f99b2589STheodore Ts'o #endif 3648f99b2589STheodore Ts'o } 364923301410STheodore Ts'o } 3650ac27a0ecSDave Kleikamp 3651281b5995STheodore Ts'o /* Handle clustersize */ 3652281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3653e2b911c5SDarrick J. Wong has_bigalloc = ext4_has_feature_bigalloc(sb); 3654281b5995STheodore Ts'o if (has_bigalloc) { 3655281b5995STheodore Ts'o if (clustersize < blocksize) { 3656281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3657281b5995STheodore Ts'o "cluster size (%d) smaller than " 3658281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3659281b5995STheodore Ts'o goto failed_mount; 3660281b5995STheodore Ts'o } 3661281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3662281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3663281b5995STheodore Ts'o sbi->s_clusters_per_group = 3664281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3665281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3666281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3667281b5995STheodore Ts'o "#clusters per group too big: %lu", 3668281b5995STheodore Ts'o sbi->s_clusters_per_group); 3669281b5995STheodore Ts'o goto failed_mount; 3670281b5995STheodore Ts'o } 3671281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3672281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3673281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3674281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3675281b5995STheodore Ts'o sbi->s_blocks_per_group, 3676281b5995STheodore Ts'o sbi->s_clusters_per_group); 3677281b5995STheodore Ts'o goto failed_mount; 3678281b5995STheodore Ts'o } 3679281b5995STheodore Ts'o } else { 3680281b5995STheodore Ts'o if (clustersize != blocksize) { 3681281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3682281b5995STheodore Ts'o "block size (%d)", clustersize, 3683281b5995STheodore Ts'o blocksize); 3684281b5995STheodore Ts'o clustersize = blocksize; 3685281b5995STheodore Ts'o } 3686ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3687b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3688b31e1552SEric Sandeen "#blocks per group too big: %lu", 3689ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3690ac27a0ecSDave Kleikamp goto failed_mount; 3691ac27a0ecSDave Kleikamp } 3692281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3693281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3694281b5995STheodore Ts'o } 3695281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3696281b5995STheodore Ts'o 3697ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3698b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3699b31e1552SEric Sandeen "#inodes per group too big: %lu", 3700ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3701ac27a0ecSDave Kleikamp goto failed_mount; 3702ac27a0ecSDave Kleikamp } 3703ac27a0ecSDave Kleikamp 3704960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 3705960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 3706960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 3707960fd856STheodore Ts'o 3708bf43d84bSEric Sandeen /* 3709bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3710bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3711bf43d84bSEric Sandeen */ 37125a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 371330ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 37145a9ae68aSDarrick J. Wong if (err) { 3715b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3716bf43d84bSEric Sandeen " too large to mount safely on this system"); 3717ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 371890c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 3719ac27a0ecSDave Kleikamp goto failed_mount; 3720ac27a0ecSDave Kleikamp } 3721ac27a0ecSDave Kleikamp 3722617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3723617ba13bSMingming Cao goto cantfind_ext4; 3724e7c95593SEric Sandeen 37250f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 37260f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 37270f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3728b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3729b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 37300f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 37310f2ddca6SFrom: Thiemo Nagel goto failed_mount; 37320f2ddca6SFrom: Thiemo Nagel } 37330f2ddca6SFrom: Thiemo Nagel 37344ec11028STheodore Ts'o /* 37354ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 37364ec11028STheodore Ts'o * of the filesystem. 37374ec11028STheodore Ts'o */ 37384ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3739b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3740b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3741e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 37424ec11028STheodore Ts'o ext4_blocks_count(es)); 3743e7c95593SEric Sandeen goto failed_mount; 3744e7c95593SEric Sandeen } 3745bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3746bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3747bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3748bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 37494ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3750b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 37514ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3752b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 37534ec11028STheodore Ts'o ext4_blocks_count(es), 37544ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 37554ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 37564ec11028STheodore Ts'o goto failed_mount; 37574ec11028STheodore Ts'o } 3758bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3759fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3760fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3761617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3762617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3763f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3764f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3765ac27a0ecSDave Kleikamp GFP_KERNEL); 3766ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3767b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 37682cde417dSTheodore Ts'o ret = -ENOMEM; 3769ac27a0ecSDave Kleikamp goto failed_mount; 3770ac27a0ecSDave Kleikamp } 3771ac27a0ecSDave Kleikamp 3772705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3773ac27a0ecSDave Kleikamp 3774ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 377570bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3776a8ac900bSGioh Kim sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); 3777ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3778b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3779b31e1552SEric Sandeen "can't read group descriptor %d", i); 3780ac27a0ecSDave Kleikamp db_count = i; 3781ac27a0ecSDave Kleikamp goto failed_mount2; 3782ac27a0ecSDave Kleikamp } 3783ac27a0ecSDave Kleikamp } 3784829fa70dSTheodore Ts'o if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { 3785b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 37866a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 3787f9ae9cf5STheodore Ts'o goto failed_mount2; 3788ac27a0ecSDave Kleikamp } 3789772cb7c8SJose R. Santos 3790f9ae9cf5STheodore Ts'o sbi->s_gdb_count = db_count; 3791ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3792ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3793ac27a0ecSDave Kleikamp 379404ecddb7SJan Mrazek setup_timer(&sbi->s_err_report, print_daily_error_info, 379504ecddb7SJan Mrazek (unsigned long) sb); 379604496411STao Ma 3797a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 3798eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 3799ce7e010aSTheodore Ts'o goto failed_mount3; 3800ce7e010aSTheodore Ts'o 3801c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 380267a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 3803c9de560dSAlex Tomas 3804f9ae9cf5STheodore Ts'o /* 3805f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 3806f9ae9cf5STheodore Ts'o */ 3807f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 3808617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3809617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3810a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 3811ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3812617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3813e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 38141fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 3815262b4662SJan Kara else 3816262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 3817689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 3818ac27a0ecSDave Kleikamp #endif 3819f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3820f2fa2ffcSAneesh Kumar K.V 3821ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 38223b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 3823ac27a0ecSDave Kleikamp 3824ac27a0ecSDave Kleikamp sb->s_root = NULL; 3825ac27a0ecSDave Kleikamp 3826ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3827e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 3828ac27a0ecSDave Kleikamp 3829e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb) && !(sb->s_flags & MS_RDONLY)) 3830c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 383150460fe8SDarrick J. Wong goto failed_mount3a; 3832c5e06d10SJohann Lombardi 3833ac27a0ecSDave Kleikamp /* 3834ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3835ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3836ac27a0ecSDave Kleikamp */ 3837e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 3838617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 383950460fe8SDarrick J. Wong goto failed_mount3a; 38400390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 3841e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 3842b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3843b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3844744692dcSJiaying Zhang goto failed_mount_wq; 3845ac27a0ecSDave Kleikamp } else { 38461e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 38471e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 38481e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 38491e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 38501e381f60SDmitry Monakhov goto failed_mount_wq; 38511e381f60SDmitry Monakhov } 38521e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 38531e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 38541e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 38551e381f60SDmitry Monakhov goto failed_mount_wq; 38561e381f60SDmitry Monakhov } 38571e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 38581e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 38591e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 38601e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 38611e381f60SDmitry Monakhov goto failed_mount_wq; 38621e381f60SDmitry Monakhov } 38631e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 38641e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 38651e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 38661e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 38671e381f60SDmitry Monakhov goto failed_mount_wq; 38681e381f60SDmitry Monakhov } 38691e381f60SDmitry Monakhov sbi->s_def_mount_opt &= EXT4_MOUNT_JOURNAL_CHECKSUM; 38701e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 3871fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 38720390131bSFrank Mayhar sbi->s_journal = NULL; 38730390131bSFrank Mayhar needs_recovery = 0; 38740390131bSFrank Mayhar goto no_journal; 3875ac27a0ecSDave Kleikamp } 3876ac27a0ecSDave Kleikamp 3877e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 3878eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3879eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3880b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3881744692dcSJiaying Zhang goto failed_mount_wq; 3882eb40a09cSJose R. Santos } 3883eb40a09cSJose R. Santos 388425ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 388525ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 388625ed6e8aSDarrick J. Wong "feature set"); 388725ed6e8aSDarrick J. Wong goto failed_mount_wq; 3888d4da6c9cSLinus Torvalds } 3889818d276cSGirish Shilamkar 3890ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 3891ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 3892ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3893ac27a0ecSDave Kleikamp case 0: 3894ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 389563f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 389663f57933SAndrew Morton * cope, else JOURNAL_DATA 389763f57933SAndrew Morton */ 3898dab291afSMingming Cao if (jbd2_journal_check_available_features 3899dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 3900fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3901ac27a0ecSDave Kleikamp else 3902fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3903ac27a0ecSDave Kleikamp break; 3904ac27a0ecSDave Kleikamp 3905617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 3906617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 3907dab291afSMingming Cao if (!jbd2_journal_check_available_features 3908dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 3909b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 3910b31e1552SEric Sandeen "requested data journaling mode"); 3911744692dcSJiaying Zhang goto failed_mount_wq; 3912ac27a0ecSDave Kleikamp } 3913ac27a0ecSDave Kleikamp default: 3914ac27a0ecSDave Kleikamp break; 3915ac27a0ecSDave Kleikamp } 3916b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3917ac27a0ecSDave Kleikamp 391818aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 391918aadd47SBobi Jam 3920ce7e010aSTheodore Ts'o no_journal: 392182939d79SJan Kara sbi->s_mb_cache = ext4_xattr_create_cache(); 39229c191f70ST Makphaibulchoke if (!sbi->s_mb_cache) { 39239c191f70ST Makphaibulchoke ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); 39249c191f70ST Makphaibulchoke goto failed_mount_wq; 39259c191f70ST Makphaibulchoke } 39269c191f70ST Makphaibulchoke 3927e2b911c5SDarrick J. Wong if ((DUMMY_ENCRYPTION_ENABLED(sbi) || ext4_has_feature_encrypt(sb)) && 392809cbfeafSKirill A. Shutemov (blocksize != PAGE_SIZE)) { 39291cb767cdSTheodore Ts'o ext4_msg(sb, KERN_ERR, 39301cb767cdSTheodore Ts'o "Unsupported blocksize for fs encryption"); 39311cb767cdSTheodore Ts'o goto failed_mount_wq; 39321cb767cdSTheodore Ts'o } 39331cb767cdSTheodore Ts'o 3934e2b911c5SDarrick J. Wong if (DUMMY_ENCRYPTION_ENABLED(sbi) && !(sb->s_flags & MS_RDONLY) && 3935e2b911c5SDarrick J. Wong !ext4_has_feature_encrypt(sb)) { 3936e2b911c5SDarrick J. Wong ext4_set_feature_encrypt(sb); 39376ddb2447STheodore Ts'o ext4_commit_super(sb, 1); 39386ddb2447STheodore Ts'o } 39396ddb2447STheodore Ts'o 3940fd89d5f2STejun Heo /* 3941952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 3942952fc18eSTheodore Ts'o * superblock if present. 3943952fc18eSTheodore Ts'o */ 3944952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 3945952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 3946952fc18eSTheodore Ts'o else { 394707aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 394807aa2ea1SLukas Czerner if (err) 3949952fc18eSTheodore Ts'o goto failed_mount_wq; 3950952fc18eSTheodore Ts'o } 3951952fc18eSTheodore Ts'o 3952952fc18eSTheodore Ts'o /* 3953fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 3954fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 3955fd89d5f2STejun Heo */ 39562e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 39572e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 39582e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 39592e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 396007aa2ea1SLukas Czerner ret = -ENOMEM; 39612e8fa54eSJan Kara goto failed_mount4; 39622e8fa54eSJan Kara } 39632e8fa54eSJan Kara 3964ac27a0ecSDave Kleikamp /* 3965dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 3966ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 3967ac27a0ecSDave Kleikamp */ 3968ac27a0ecSDave Kleikamp 39691d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 39701d1fe1eeSDavid Howells if (IS_ERR(root)) { 3971b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 39721d1fe1eeSDavid Howells ret = PTR_ERR(root); 397332a9bb57SManish Katiyar root = NULL; 3974ac27a0ecSDave Kleikamp goto failed_mount4; 3975ac27a0ecSDave Kleikamp } 3976ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 3977b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 397894bf608aSAl Viro iput(root); 3979ac27a0ecSDave Kleikamp goto failed_mount4; 3980ac27a0ecSDave Kleikamp } 398148fde701SAl Viro sb->s_root = d_make_root(root); 39821d1fe1eeSDavid Howells if (!sb->s_root) { 3983b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 39841d1fe1eeSDavid Howells ret = -ENOMEM; 39851d1fe1eeSDavid Howells goto failed_mount4; 39861d1fe1eeSDavid Howells } 3987ac27a0ecSDave Kleikamp 39887e84b621SEric Sandeen if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) 39897e84b621SEric Sandeen sb->s_flags |= MS_RDONLY; 3990ef7f3835SKalpak Shah 3991ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 3992ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 3993ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3994ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3995e2b911c5SDarrick J. Wong if (ext4_has_feature_extra_isize(sb)) { 3996ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3997ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 3998ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3999ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 4000ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4001ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 4002ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4003ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 4004ef7f3835SKalpak Shah } 4005ef7f3835SKalpak Shah } 4006ef7f3835SKalpak Shah /* Check if enough inode space is available */ 4007ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 4008ef7f3835SKalpak Shah sbi->s_inode_size) { 4009ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4010ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4011b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 4012b31e1552SEric Sandeen "available"); 4013ef7f3835SKalpak Shah } 4014ef7f3835SKalpak Shah 4015b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 401627dd4385SLukas Czerner 40176fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 40186fd058f7STheodore Ts'o if (err) { 4019b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 4020fbe845ddSCurt Wohlgemuth "zone (%d)", err); 4021f9ae9cf5STheodore Ts'o goto failed_mount4a; 4022f9ae9cf5STheodore Ts'o } 4023f9ae9cf5STheodore Ts'o 4024f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 4025f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 4026f9ae9cf5STheodore Ts'o if (err) { 4027f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 4028f9ae9cf5STheodore Ts'o err); 4029dcf2d804STao Ma goto failed_mount5; 4030c2774d84SAneesh Kumar K.V } 4031c2774d84SAneesh Kumar K.V 4032d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 4033d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 4034d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 4035908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 4036908c7f19STejun Heo GFP_KERNEL); 4037d5e03cbbSTheodore Ts'o if (!err) { 4038d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 4039d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 4040908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 4041908c7f19STejun Heo GFP_KERNEL); 4042d5e03cbbSTheodore Ts'o } 4043d5e03cbbSTheodore Ts'o if (!err) 4044d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 4045908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 4046d5e03cbbSTheodore Ts'o if (!err) 4047908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 4048908c7f19STejun Heo GFP_KERNEL); 4049c8585c6fSDaeho Jeong if (!err) 4050c8585c6fSDaeho Jeong err = percpu_init_rwsem(&sbi->s_journal_flag_rwsem); 4051c8585c6fSDaeho Jeong 4052d5e03cbbSTheodore Ts'o if (err) { 4053d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 4054d5e03cbbSTheodore Ts'o goto failed_mount6; 4055d5e03cbbSTheodore Ts'o } 4056d5e03cbbSTheodore Ts'o 4057e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 4058d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 4059d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4060d5e03cbbSTheodore Ts'o "unable to initialize " 4061d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 4062d5e03cbbSTheodore Ts'o goto failed_mount6; 4063d5e03cbbSTheodore Ts'o } 4064d5e03cbbSTheodore Ts'o 4065bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 4066bfff6873SLukas Czerner if (err) 4067dcf2d804STao Ma goto failed_mount6; 4068bfff6873SLukas Czerner 4069b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 4070dcf2d804STao Ma if (err) 4071dcf2d804STao Ma goto failed_mount7; 40723197ebdbSTheodore Ts'o 40739b2ff357SJan Kara #ifdef CONFIG_QUOTA 40749b2ff357SJan Kara /* Enable quota usage during mount. */ 4075e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) && !(sb->s_flags & MS_RDONLY)) { 40769b2ff357SJan Kara err = ext4_enable_quotas(sb); 40779b2ff357SJan Kara if (err) 40789b2ff357SJan Kara goto failed_mount8; 40799b2ff357SJan Kara } 40809b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 40819b2ff357SJan Kara 4082617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 4083617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 4084617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 40850390131bSFrank Mayhar if (needs_recovery) { 4086b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 4087617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 40880390131bSFrank Mayhar } 40890390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 40900390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 40910390131bSFrank Mayhar descr = " journalled data mode"; 40920390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 40930390131bSFrank Mayhar descr = " ordered data mode"; 40940390131bSFrank Mayhar else 40950390131bSFrank Mayhar descr = " writeback data mode"; 40960390131bSFrank Mayhar } else 40970390131bSFrank Mayhar descr = "out journal"; 40980390131bSFrank Mayhar 409979add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 410079add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 410179add3a3SLukas Czerner if (!blk_queue_discard(q)) 410279add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 410379add3a3SLukas Czerner "mounting with \"discard\" option, but " 410479add3a3SLukas Czerner "the device does not support discard"); 410579add3a3SLukas Czerner } 410679add3a3SLukas Czerner 4107e294a537STheodore Ts'o if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 4108d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 41098b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 41108b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 4111ac27a0ecSDave Kleikamp 411266e61a9eSTheodore Ts'o if (es->s_error_count) 411366e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 4114ac27a0ecSDave Kleikamp 4115efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 4116efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 4117efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 4118efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 4119efbed4dcSTheodore Ts'o 4120d4c402d9SCurt Wohlgemuth kfree(orig_data); 4121a7550b30SJaegeuk Kim #ifdef CONFIG_EXT4_FS_ENCRYPTION 4122a7550b30SJaegeuk Kim memcpy(sbi->key_prefix, EXT4_KEY_DESC_PREFIX, 4123a7550b30SJaegeuk Kim EXT4_KEY_DESC_PREFIX_SIZE); 4124a7550b30SJaegeuk Kim sbi->key_prefix_size = EXT4_KEY_DESC_PREFIX_SIZE; 4125a7550b30SJaegeuk Kim #endif 4126ac27a0ecSDave Kleikamp return 0; 4127ac27a0ecSDave Kleikamp 4128617ba13bSMingming Cao cantfind_ext4: 4129ac27a0ecSDave Kleikamp if (!silent) 4130b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4131ac27a0ecSDave Kleikamp goto failed_mount; 4132ac27a0ecSDave Kleikamp 413372ba7450STheodore Ts'o #ifdef CONFIG_QUOTA 413472ba7450STheodore Ts'o failed_mount8: 4135ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 413672ba7450STheodore Ts'o #endif 4137dcf2d804STao Ma failed_mount7: 4138dcf2d804STao Ma ext4_unregister_li_request(sb); 4139dcf2d804STao Ma failed_mount6: 4140f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 4141d5e03cbbSTheodore Ts'o if (sbi->s_flex_groups) 4142b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 4143d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4144d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4145d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 4146d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 414700764937SAzat Khuzhin failed_mount5: 4148f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 4149f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 4150f9ae9cf5STheodore Ts'o failed_mount4a: 415194bf608aSAl Viro dput(sb->s_root); 415232a9bb57SManish Katiyar sb->s_root = NULL; 415394bf608aSAl Viro failed_mount4: 4154b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 41552e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 41562e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 41574c0425ffSMingming Cao failed_mount_wq: 415882939d79SJan Kara if (sbi->s_mb_cache) { 415982939d79SJan Kara ext4_xattr_destroy_cache(sbi->s_mb_cache); 416082939d79SJan Kara sbi->s_mb_cache = NULL; 416182939d79SJan Kara } 41620390131bSFrank Mayhar if (sbi->s_journal) { 4163dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 416447b4a50bSJan Kara sbi->s_journal = NULL; 41650390131bSFrank Mayhar } 416650460fe8SDarrick J. Wong failed_mount3a: 4167d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 4168eb68d0e2SZheng Liu failed_mount3: 41699105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 4170c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4171c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4172ac27a0ecSDave Kleikamp failed_mount2: 4173ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4174ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4175b93b41d4SAl Viro kvfree(sbi->s_group_desc); 4176ac27a0ecSDave Kleikamp failed_mount: 41770441984aSDarrick J. Wong if (sbi->s_chksum_driver) 41780441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4179ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4180a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4181ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4182ac27a0ecSDave Kleikamp #endif 4183617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4184ac27a0ecSDave Kleikamp brelse(bh); 4185ac27a0ecSDave Kleikamp out_fail: 4186ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4187f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 4188ac27a0ecSDave Kleikamp kfree(sbi); 4189dcc7dae3SCyrill Gorcunov out_free_orig: 4190d4c402d9SCurt Wohlgemuth kfree(orig_data); 419107aa2ea1SLukas Czerner return err ? err : ret; 4192ac27a0ecSDave Kleikamp } 4193ac27a0ecSDave Kleikamp 4194ac27a0ecSDave Kleikamp /* 4195ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4196ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4197ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4198ac27a0ecSDave Kleikamp */ 4199617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4200ac27a0ecSDave Kleikamp { 4201617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4202ac27a0ecSDave Kleikamp 4203ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 420430773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 420530773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4206ac27a0ecSDave Kleikamp 4207a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4208ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4209dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4210ac27a0ecSDave Kleikamp else 4211dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 42125bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 42135bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 42145bf5683aSHidehiro Kawai else 42155bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4216a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4217ac27a0ecSDave Kleikamp } 4218ac27a0ecSDave Kleikamp 4219617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 4220ac27a0ecSDave Kleikamp unsigned int journal_inum) 4221ac27a0ecSDave Kleikamp { 4222ac27a0ecSDave Kleikamp struct inode *journal_inode; 4223ac27a0ecSDave Kleikamp journal_t *journal; 4224ac27a0ecSDave Kleikamp 4225e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 42260390131bSFrank Mayhar 4227ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 4228ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 4229ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 4230ac27a0ecSDave Kleikamp 42311d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 42321d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4233b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4234ac27a0ecSDave Kleikamp return NULL; 4235ac27a0ecSDave Kleikamp } 4236ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4237ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4238ac27a0ecSDave Kleikamp iput(journal_inode); 4239b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4240ac27a0ecSDave Kleikamp return NULL; 4241ac27a0ecSDave Kleikamp } 4242ac27a0ecSDave Kleikamp 4243e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4244ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 42451d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4246b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4247ac27a0ecSDave Kleikamp iput(journal_inode); 4248ac27a0ecSDave Kleikamp return NULL; 4249ac27a0ecSDave Kleikamp } 4250ac27a0ecSDave Kleikamp 4251dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4252ac27a0ecSDave Kleikamp if (!journal) { 4253b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4254ac27a0ecSDave Kleikamp iput(journal_inode); 4255ac27a0ecSDave Kleikamp return NULL; 4256ac27a0ecSDave Kleikamp } 4257ac27a0ecSDave Kleikamp journal->j_private = sb; 4258617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4259ac27a0ecSDave Kleikamp return journal; 4260ac27a0ecSDave Kleikamp } 4261ac27a0ecSDave Kleikamp 4262617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4263ac27a0ecSDave Kleikamp dev_t j_dev) 4264ac27a0ecSDave Kleikamp { 4265ac27a0ecSDave Kleikamp struct buffer_head *bh; 4266ac27a0ecSDave Kleikamp journal_t *journal; 4267617ba13bSMingming Cao ext4_fsblk_t start; 4268617ba13bSMingming Cao ext4_fsblk_t len; 4269ac27a0ecSDave Kleikamp int hblock, blocksize; 4270617ba13bSMingming Cao ext4_fsblk_t sb_block; 4271ac27a0ecSDave Kleikamp unsigned long offset; 4272617ba13bSMingming Cao struct ext4_super_block *es; 4273ac27a0ecSDave Kleikamp struct block_device *bdev; 4274ac27a0ecSDave Kleikamp 4275e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 42760390131bSFrank Mayhar 4277b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4278ac27a0ecSDave Kleikamp if (bdev == NULL) 4279ac27a0ecSDave Kleikamp return NULL; 4280ac27a0ecSDave Kleikamp 4281ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4282e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4283ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4284b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4285b31e1552SEric Sandeen "blocksize too small for journal device"); 4286ac27a0ecSDave Kleikamp goto out_bdev; 4287ac27a0ecSDave Kleikamp } 4288ac27a0ecSDave Kleikamp 4289617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4290617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4291ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4292ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4293b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4294b31e1552SEric Sandeen "external journal"); 4295ac27a0ecSDave Kleikamp goto out_bdev; 4296ac27a0ecSDave Kleikamp } 4297ac27a0ecSDave Kleikamp 42982716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4299617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4300ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4301617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4302b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4303b31e1552SEric Sandeen "bad superblock"); 4304ac27a0ecSDave Kleikamp brelse(bh); 4305ac27a0ecSDave Kleikamp goto out_bdev; 4306ac27a0ecSDave Kleikamp } 4307ac27a0ecSDave Kleikamp 4308df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 4309df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 4310df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 4311df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 4312df4763beSDarrick J. Wong "corrupt superblock"); 4313df4763beSDarrick J. Wong brelse(bh); 4314df4763beSDarrick J. Wong goto out_bdev; 4315df4763beSDarrick J. Wong } 4316df4763beSDarrick J. Wong 4317617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4318b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4319ac27a0ecSDave Kleikamp brelse(bh); 4320ac27a0ecSDave Kleikamp goto out_bdev; 4321ac27a0ecSDave Kleikamp } 4322ac27a0ecSDave Kleikamp 4323bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4324ac27a0ecSDave Kleikamp start = sb_block + 1; 4325ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4326ac27a0ecSDave Kleikamp 4327dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4328ac27a0ecSDave Kleikamp start, len, blocksize); 4329ac27a0ecSDave Kleikamp if (!journal) { 4330b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4331ac27a0ecSDave Kleikamp goto out_bdev; 4332ac27a0ecSDave Kleikamp } 4333ac27a0ecSDave Kleikamp journal->j_private = sb; 4334dfec8a14SMike Christie ll_rw_block(REQ_OP_READ, REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); 4335ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4336ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4337b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4338ac27a0ecSDave Kleikamp goto out_journal; 4339ac27a0ecSDave Kleikamp } 4340ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4341b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4342b31e1552SEric Sandeen "user (unsupported) - %d", 4343ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4344ac27a0ecSDave Kleikamp goto out_journal; 4345ac27a0ecSDave Kleikamp } 4346617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4347617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4348ac27a0ecSDave Kleikamp return journal; 43490b8e58a1SAndreas Dilger 4350ac27a0ecSDave Kleikamp out_journal: 4351dab291afSMingming Cao jbd2_journal_destroy(journal); 4352ac27a0ecSDave Kleikamp out_bdev: 4353617ba13bSMingming Cao ext4_blkdev_put(bdev); 4354ac27a0ecSDave Kleikamp return NULL; 4355ac27a0ecSDave Kleikamp } 4356ac27a0ecSDave Kleikamp 4357617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4358617ba13bSMingming Cao struct ext4_super_block *es, 4359ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4360ac27a0ecSDave Kleikamp { 4361ac27a0ecSDave Kleikamp journal_t *journal; 4362ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4363ac27a0ecSDave Kleikamp dev_t journal_dev; 4364ac27a0ecSDave Kleikamp int err = 0; 4365ac27a0ecSDave Kleikamp int really_read_only; 4366ac27a0ecSDave Kleikamp 4367e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 43680390131bSFrank Mayhar 4369ac27a0ecSDave Kleikamp if (journal_devnum && 4370ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4371b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4372b31e1552SEric Sandeen "numbers have changed"); 4373ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4374ac27a0ecSDave Kleikamp } else 4375ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4376ac27a0ecSDave Kleikamp 4377ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4378ac27a0ecSDave Kleikamp 4379ac27a0ecSDave Kleikamp /* 4380ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4381ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4382ac27a0ecSDave Kleikamp * can get read-write access to the device. 4383ac27a0ecSDave Kleikamp */ 4384e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 4385ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4386b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4387b31e1552SEric Sandeen "required on readonly filesystem"); 4388ac27a0ecSDave Kleikamp if (really_read_only) { 4389b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4390b31e1552SEric Sandeen "unavailable, cannot proceed"); 4391ac27a0ecSDave Kleikamp return -EROFS; 4392ac27a0ecSDave Kleikamp } 4393b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4394b31e1552SEric Sandeen "be enabled during recovery"); 4395ac27a0ecSDave Kleikamp } 4396ac27a0ecSDave Kleikamp } 4397ac27a0ecSDave Kleikamp 4398ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4399b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4400b31e1552SEric Sandeen "and inode journals!"); 4401ac27a0ecSDave Kleikamp return -EINVAL; 4402ac27a0ecSDave Kleikamp } 4403ac27a0ecSDave Kleikamp 4404ac27a0ecSDave Kleikamp if (journal_inum) { 4405617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4406ac27a0ecSDave Kleikamp return -EINVAL; 4407ac27a0ecSDave Kleikamp } else { 4408617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4409ac27a0ecSDave Kleikamp return -EINVAL; 4410ac27a0ecSDave Kleikamp } 4411ac27a0ecSDave Kleikamp 441290576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4413b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 44144776004fSTheodore Ts'o 4415e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 4416dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 44171c13d5c0STheodore Ts'o if (!err) { 44181c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 44191c13d5c0STheodore Ts'o if (save) 44201c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 44211c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4422dab291afSMingming Cao err = jbd2_journal_load(journal); 44231c13d5c0STheodore Ts'o if (save) 44241c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 44251c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 44261c13d5c0STheodore Ts'o kfree(save); 44271c13d5c0STheodore Ts'o } 4428ac27a0ecSDave Kleikamp 4429ac27a0ecSDave Kleikamp if (err) { 4430b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4431dab291afSMingming Cao jbd2_journal_destroy(journal); 4432ac27a0ecSDave Kleikamp return err; 4433ac27a0ecSDave Kleikamp } 4434ac27a0ecSDave Kleikamp 4435617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4436617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4437ac27a0ecSDave Kleikamp 4438c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4439ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4440ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4441ac27a0ecSDave Kleikamp 4442ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4443e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4444ac27a0ecSDave Kleikamp } 4445ac27a0ecSDave Kleikamp 4446ac27a0ecSDave Kleikamp return 0; 4447ac27a0ecSDave Kleikamp } 4448ac27a0ecSDave Kleikamp 4449e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4450ac27a0ecSDave Kleikamp { 4451e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4452617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4453c4be0c1dSTakashi Sato int error = 0; 4454ac27a0ecSDave Kleikamp 4455bdfe0cbdSTheodore Ts'o if (!sbh || block_device_ejected(sb)) 4456c4be0c1dSTakashi Sato return error; 445771290b36STheodore Ts'o /* 445871290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 445971290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 446071290b36STheodore Ts'o * write time when we are mounting the root file system 446171290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 446271290b36STheodore Ts'o * for people who are east of GMT and who make their clock 446371290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 446471290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 446571290b36STheodore Ts'o * to complain and force a full file system check. 446671290b36STheodore Ts'o */ 446771290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4468ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4469f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4470afc32f7eSTheodore Ts'o es->s_kbytes_written = 4471afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4472afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4473afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4474f613dfcbSTheodore Ts'o else 4475f613dfcbSTheodore Ts'o es->s_kbytes_written = 4476f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 4477d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) 447857042651STheodore Ts'o ext4_free_blocks_count_set(es, 447957042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 448057042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 4481d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) 44827f93cff9STheodore Ts'o es->s_free_inodes_count = 44837f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 44845d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4485ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 448606db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 44874743f839SPranay Kr. Srivastava lock_buffer(sbh); 44884743f839SPranay Kr. Srivastava if (buffer_write_io_error(sbh)) { 44894743f839SPranay Kr. Srivastava /* 44904743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 44914743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 44924743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 44934743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 44944743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 44954743f839SPranay Kr. Srivastava * write and hope for the best. 44964743f839SPranay Kr. Srivastava */ 44974743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 44984743f839SPranay Kr. Srivastava "superblock detected"); 44994743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 45004743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 45014743f839SPranay Kr. Srivastava } 4502ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 45034743f839SPranay Kr. Srivastava unlock_buffer(sbh); 4504914258bfSTheodore Ts'o if (sync) { 4505564bc402SDaeho Jeong error = __sync_dirty_buffer(sbh, 4506564bc402SDaeho Jeong test_opt(sb, BARRIER) ? WRITE_FUA : WRITE_SYNC); 4507c4be0c1dSTakashi Sato if (error) 4508c4be0c1dSTakashi Sato return error; 4509c4be0c1dSTakashi Sato 4510c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4511c4be0c1dSTakashi Sato if (error) { 4512b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4513b31e1552SEric Sandeen "superblock"); 4514914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4515914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4516914258bfSTheodore Ts'o } 4517914258bfSTheodore Ts'o } 4518c4be0c1dSTakashi Sato return error; 4519ac27a0ecSDave Kleikamp } 4520ac27a0ecSDave Kleikamp 4521ac27a0ecSDave Kleikamp /* 4522ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4523ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4524ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4525ac27a0ecSDave Kleikamp */ 4526617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4527617ba13bSMingming Cao struct ext4_super_block *es) 4528ac27a0ecSDave Kleikamp { 4529617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4530ac27a0ecSDave Kleikamp 4531e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 45320390131bSFrank Mayhar BUG_ON(journal != NULL); 45330390131bSFrank Mayhar return; 45340390131bSFrank Mayhar } 4535dab291afSMingming Cao jbd2_journal_lock_updates(journal); 45367ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 45377ffe1ea8SHidehiro Kawai goto out; 45387ffe1ea8SHidehiro Kawai 4539e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb) && 4540ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4541e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 4542e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4543ac27a0ecSDave Kleikamp } 45447ffe1ea8SHidehiro Kawai 45457ffe1ea8SHidehiro Kawai out: 4546dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4547ac27a0ecSDave Kleikamp } 4548ac27a0ecSDave Kleikamp 4549ac27a0ecSDave Kleikamp /* 4550ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4551ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4552ac27a0ecSDave Kleikamp * main filesystem now. 4553ac27a0ecSDave Kleikamp */ 4554617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4555617ba13bSMingming Cao struct ext4_super_block *es) 4556ac27a0ecSDave Kleikamp { 4557ac27a0ecSDave Kleikamp journal_t *journal; 4558ac27a0ecSDave Kleikamp int j_errno; 4559ac27a0ecSDave Kleikamp const char *errstr; 4560ac27a0ecSDave Kleikamp 4561e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 45620390131bSFrank Mayhar 4563617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4564ac27a0ecSDave Kleikamp 4565ac27a0ecSDave Kleikamp /* 4566ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4567617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4568ac27a0ecSDave Kleikamp */ 4569ac27a0ecSDave Kleikamp 4570dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4571ac27a0ecSDave Kleikamp if (j_errno) { 4572ac27a0ecSDave Kleikamp char nbuf[16]; 4573ac27a0ecSDave Kleikamp 4574617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 457512062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4576ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 457712062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4578ac27a0ecSDave Kleikamp 4579617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4580617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4581e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4582ac27a0ecSDave Kleikamp 4583dab291afSMingming Cao jbd2_journal_clear_err(journal); 4584d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4585ac27a0ecSDave Kleikamp } 4586ac27a0ecSDave Kleikamp } 4587ac27a0ecSDave Kleikamp 4588ac27a0ecSDave Kleikamp /* 4589ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4590ac27a0ecSDave Kleikamp * and wait on the commit. 4591ac27a0ecSDave Kleikamp */ 4592617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4593ac27a0ecSDave Kleikamp { 4594ac27a0ecSDave Kleikamp journal_t *journal; 4595ac27a0ecSDave Kleikamp 4596ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4597ac27a0ecSDave Kleikamp return 0; 4598ac27a0ecSDave Kleikamp 4599617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4600b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 4601ac27a0ecSDave Kleikamp } 4602ac27a0ecSDave Kleikamp 4603617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4604ac27a0ecSDave Kleikamp { 460514ce0cb4STheodore Ts'o int ret = 0; 46069eddacf9SJan Kara tid_t target; 460706a407f1SDmitry Monakhov bool needs_barrier = false; 46088d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4609ac27a0ecSDave Kleikamp 46109bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 46112e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 4612a1177825SJan Kara /* 4613a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4614a1177825SJan Kara * no dirty dquots 4615a1177825SJan Kara */ 4616a1177825SJan Kara dquot_writeback_dquots(sb, -1); 461706a407f1SDmitry Monakhov /* 461806a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 461906a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 462006a407f1SDmitry Monakhov * transaction_commit will do it for us. 462106a407f1SDmitry Monakhov */ 4622bda32530STheodore Ts'o if (sbi->s_journal) { 462306a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 462406a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 462506a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 462606a407f1SDmitry Monakhov needs_barrier = true; 462706a407f1SDmitry Monakhov 46288d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4629ac27a0ecSDave Kleikamp if (wait) 4630bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 4631bda32530STheodore Ts'o target); 46320390131bSFrank Mayhar } 4633bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 4634bda32530STheodore Ts'o needs_barrier = true; 463506a407f1SDmitry Monakhov if (needs_barrier) { 463606a407f1SDmitry Monakhov int err; 463706a407f1SDmitry Monakhov err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 463806a407f1SDmitry Monakhov if (!ret) 463906a407f1SDmitry Monakhov ret = err; 464006a407f1SDmitry Monakhov } 464106a407f1SDmitry Monakhov 464206a407f1SDmitry Monakhov return ret; 464306a407f1SDmitry Monakhov } 464406a407f1SDmitry Monakhov 4645ac27a0ecSDave Kleikamp /* 4646ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4647ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4648be4f27d3SYongqiang Yang * 4649be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 46508e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 46518e8ad8a5SJan Kara * modifications. 4652ac27a0ecSDave Kleikamp */ 4653c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4654ac27a0ecSDave Kleikamp { 4655c4be0c1dSTakashi Sato int error = 0; 4656c4be0c1dSTakashi Sato journal_t *journal; 4657ac27a0ecSDave Kleikamp 46589ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 46599ca92389STheodore Ts'o return 0; 46609ca92389STheodore Ts'o 4661c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4662ac27a0ecSDave Kleikamp 4663bb044576STheodore Ts'o if (journal) { 4664ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4665dab291afSMingming Cao jbd2_journal_lock_updates(journal); 46667ffe1ea8SHidehiro Kawai 46677ffe1ea8SHidehiro Kawai /* 4668bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 4669bb044576STheodore Ts'o * flush the journal. 46707ffe1ea8SHidehiro Kawai */ 4671c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 46726b0310fbSEric Sandeen if (error < 0) 46736b0310fbSEric Sandeen goto out; 4674ac27a0ecSDave Kleikamp 4675ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4676e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 4677c642dc9eSEric Sandeen } 4678c642dc9eSEric Sandeen 4679e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 46806b0310fbSEric Sandeen out: 4681bb044576STheodore Ts'o if (journal) 46828e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 4683bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 46846b0310fbSEric Sandeen return error; 4685ac27a0ecSDave Kleikamp } 4686ac27a0ecSDave Kleikamp 4687ac27a0ecSDave Kleikamp /* 4688ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4689ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4690ac27a0ecSDave Kleikamp */ 4691c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4692ac27a0ecSDave Kleikamp { 46939ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 46949ca92389STheodore Ts'o return 0; 46959ca92389STheodore Ts'o 4696c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 46979ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4698e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 4699c642dc9eSEric Sandeen } 4700c642dc9eSEric Sandeen 4701e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4702c4be0c1dSTakashi Sato return 0; 4703ac27a0ecSDave Kleikamp } 4704ac27a0ecSDave Kleikamp 4705673c6100STheodore Ts'o /* 4706673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4707673c6100STheodore Ts'o */ 4708673c6100STheodore Ts'o struct ext4_mount_options { 4709673c6100STheodore Ts'o unsigned long s_mount_opt; 4710a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 471108cefc7aSEric W. Biederman kuid_t s_resuid; 471208cefc7aSEric W. Biederman kgid_t s_resgid; 4713673c6100STheodore Ts'o unsigned long s_commit_interval; 4714673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4715673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4716673c6100STheodore Ts'o int s_jquota_fmt; 4717a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 4718673c6100STheodore Ts'o #endif 4719673c6100STheodore Ts'o }; 4720673c6100STheodore Ts'o 4721617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4722ac27a0ecSDave Kleikamp { 4723617ba13bSMingming Cao struct ext4_super_block *es; 4724617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4725ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4726617ba13bSMingming Cao struct ext4_mount_options old_opts; 4727c79d967dSChristoph Hellwig int enable_quota = 0; 47288a266467STheodore Ts'o ext4_group_t g; 4729b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4730c5e06d10SJohann Lombardi int err = 0; 4731ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 473203dafb5fSChen Gang int i, j; 4733ac27a0ecSDave Kleikamp #endif 4734d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4735ac27a0ecSDave Kleikamp 4736ac27a0ecSDave Kleikamp /* Store the original options */ 4737ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4738ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4739a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4740ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4741ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4742ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 474330773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 474430773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4745ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4746ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4747a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 474803dafb5fSChen Gang if (sbi->s_qf_names[i]) { 474903dafb5fSChen Gang old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], 475003dafb5fSChen Gang GFP_KERNEL); 475103dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 475203dafb5fSChen Gang for (j = 0; j < i; j++) 475303dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 47543e36a163SWei Yongjun kfree(orig_data); 475503dafb5fSChen Gang return -ENOMEM; 475603dafb5fSChen Gang } 475703dafb5fSChen Gang } else 475803dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 4759ac27a0ecSDave Kleikamp #endif 4760b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4761b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4762ac27a0ecSDave Kleikamp 4763661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4764ac27a0ecSDave Kleikamp err = -EINVAL; 4765ac27a0ecSDave Kleikamp goto restore_opts; 4766ac27a0ecSDave Kleikamp } 4767ac27a0ecSDave Kleikamp 47686b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 47696b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 47706b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 47712d5b86e0SEric Sandeen "during remount not supported; ignoring"); 47722d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 4773c6d3d56dSDarrick J. Wong } 4774c6d3d56dSDarrick J. Wong 47756ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 47766ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 47776ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 47786ae6514bSPiotr Sarna "both data=journal and delalloc"); 47796ae6514bSPiotr Sarna err = -EINVAL; 47806ae6514bSPiotr Sarna goto restore_opts; 47816ae6514bSPiotr Sarna } 47826ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 47836ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 47846ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 47856ae6514bSPiotr Sarna err = -EINVAL; 47866ae6514bSPiotr Sarna goto restore_opts; 47876ae6514bSPiotr Sarna } 4788923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 4789923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 4790923ae0ffSRoss Zwisler "both data=journal and dax"); 4791923ae0ffSRoss Zwisler err = -EINVAL; 4792923ae0ffSRoss Zwisler goto restore_opts; 4793923ae0ffSRoss Zwisler } 4794923ae0ffSRoss Zwisler } 4795923ae0ffSRoss Zwisler 4796923ae0ffSRoss Zwisler if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { 4797923ae0ffSRoss Zwisler ext4_msg(sb, KERN_WARNING, "warning: refusing change of " 4798923ae0ffSRoss Zwisler "dax flag with busy inodes while remounting"); 4799923ae0ffSRoss Zwisler sbi->s_mount_opt ^= EXT4_MOUNT_DAX; 48006ae6514bSPiotr Sarna } 48016ae6514bSPiotr Sarna 48024ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4803c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4804ac27a0ecSDave Kleikamp 4805ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4806482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4807ac27a0ecSDave Kleikamp 4808ac27a0ecSDave Kleikamp es = sbi->s_es; 4809ac27a0ecSDave Kleikamp 4810b3881f74STheodore Ts'o if (sbi->s_journal) { 4811617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4812b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4813b3881f74STheodore Ts'o } 4814ac27a0ecSDave Kleikamp 4815a2fd66d0STheodore Ts'o if (*flags & MS_LAZYTIME) 4816a2fd66d0STheodore Ts'o sb->s_flags |= MS_LAZYTIME; 4817a2fd66d0STheodore Ts'o 4818661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 48194ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4820ac27a0ecSDave Kleikamp err = -EROFS; 4821ac27a0ecSDave Kleikamp goto restore_opts; 4822ac27a0ecSDave Kleikamp } 4823ac27a0ecSDave Kleikamp 4824ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 482538c03b34STheodore Ts'o err = sync_filesystem(sb); 482638c03b34STheodore Ts'o if (err < 0) 482738c03b34STheodore Ts'o goto restore_opts; 48280f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 48290f0dd62fSChristoph Hellwig if (err < 0) 4830c79d967dSChristoph Hellwig goto restore_opts; 4831c79d967dSChristoph Hellwig 4832ac27a0ecSDave Kleikamp /* 4833ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4834ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4835ac27a0ecSDave Kleikamp */ 4836ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4837ac27a0ecSDave Kleikamp 4838ac27a0ecSDave Kleikamp /* 4839ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4840ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4841ac27a0ecSDave Kleikamp * mark the partition as valid again. 4842ac27a0ecSDave Kleikamp */ 4843617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4844617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4845ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4846ac27a0ecSDave Kleikamp 4847a63c9eb2STheodore Ts'o if (sbi->s_journal) 4848617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4849ac27a0ecSDave Kleikamp } else { 4850a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4851e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 48522cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 4853ac27a0ecSDave Kleikamp err = -EROFS; 4854ac27a0ecSDave Kleikamp goto restore_opts; 4855ac27a0ecSDave Kleikamp } 4856ead6596bSEric Sandeen /* 48578a266467STheodore Ts'o * Make sure the group descriptor checksums 48580b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 48598a266467STheodore Ts'o */ 48608a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 48618a266467STheodore Ts'o struct ext4_group_desc *gdp = 48628a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 48638a266467STheodore Ts'o 4864feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 4865b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4866b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 4867e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 48688a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 48696a797d27SDarrick J. Wong err = -EFSBADCRC; 48708a266467STheodore Ts'o goto restore_opts; 48718a266467STheodore Ts'o } 48728a266467STheodore Ts'o } 48738a266467STheodore Ts'o 48748a266467STheodore Ts'o /* 4875ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4876ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4877ead6596bSEric Sandeen * require a full umount/remount for now. 4878ead6596bSEric Sandeen */ 4879ead6596bSEric Sandeen if (es->s_last_orphan) { 4880b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4881ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4882ead6596bSEric Sandeen "orphan inode list. Please " 4883b31e1552SEric Sandeen "umount/remount instead"); 4884ead6596bSEric Sandeen err = -EINVAL; 4885ead6596bSEric Sandeen goto restore_opts; 4886ead6596bSEric Sandeen } 4887ead6596bSEric Sandeen 4888ac27a0ecSDave Kleikamp /* 4889ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4890ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4891ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4892ac27a0ecSDave Kleikamp * the partition.) 4893ac27a0ecSDave Kleikamp */ 48940390131bSFrank Mayhar if (sbi->s_journal) 4895617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4896ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4897617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4898ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4899e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 4900c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 4901c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 4902c5e06d10SJohann Lombardi err = -EROFS; 4903c5e06d10SJohann Lombardi goto restore_opts; 4904c5e06d10SJohann Lombardi } 4905c79d967dSChristoph Hellwig enable_quota = 1; 4906ac27a0ecSDave Kleikamp } 4907ac27a0ecSDave Kleikamp } 4908bfff6873SLukas Czerner 4909bfff6873SLukas Czerner /* 4910bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4911bfff6873SLukas Czerner * current settings 4912bfff6873SLukas Czerner */ 4913bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4914bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4915bfff6873SLukas Czerner else { 4916bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4917bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4918bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4919bfff6873SLukas Czerner } 4920bfff6873SLukas Czerner 49216fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 4922d096ad0fSMichael Tokarev if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) 4923e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 49240390131bSFrank Mayhar 4925ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4926ac27a0ecSDave Kleikamp /* Release old quota file names */ 4927a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4928ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 49297c319d32SAditya Kali if (enable_quota) { 49307c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 49310f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 4932e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 49337c319d32SAditya Kali err = ext4_enable_quotas(sb); 493407724f98STheodore Ts'o if (err) 49357c319d32SAditya Kali goto restore_opts; 49367c319d32SAditya Kali } 49377c319d32SAditya Kali } 49387c319d32SAditya Kali #endif 4939d4c402d9SCurt Wohlgemuth 4940a26f4992STheodore Ts'o *flags = (*flags & ~MS_LAZYTIME) | (sb->s_flags & MS_LAZYTIME); 4941d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 4942d4c402d9SCurt Wohlgemuth kfree(orig_data); 4943ac27a0ecSDave Kleikamp return 0; 49440b8e58a1SAndreas Dilger 4945ac27a0ecSDave Kleikamp restore_opts: 4946ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 4947ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 4948a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 4949ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 4950ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 4951ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 495230773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 495330773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 4954ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4955ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 4956a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 4957ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4958ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 4959ac27a0ecSDave Kleikamp } 4960ac27a0ecSDave Kleikamp #endif 4961d4c402d9SCurt Wohlgemuth kfree(orig_data); 4962ac27a0ecSDave Kleikamp return err; 4963ac27a0ecSDave Kleikamp } 4964ac27a0ecSDave Kleikamp 4965689c958cSLi Xi #ifdef CONFIG_QUOTA 4966689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 4967689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 4968689c958cSLi Xi { 4969689c958cSLi Xi struct kqid qid; 4970689c958cSLi Xi struct dquot *dquot; 4971689c958cSLi Xi u64 limit; 4972689c958cSLi Xi u64 curblock; 4973689c958cSLi Xi 4974689c958cSLi Xi qid = make_kqid_projid(projid); 4975689c958cSLi Xi dquot = dqget(sb, qid); 4976689c958cSLi Xi if (IS_ERR(dquot)) 4977689c958cSLi Xi return PTR_ERR(dquot); 4978689c958cSLi Xi spin_lock(&dq_data_lock); 4979689c958cSLi Xi 4980689c958cSLi Xi limit = (dquot->dq_dqb.dqb_bsoftlimit ? 4981689c958cSLi Xi dquot->dq_dqb.dqb_bsoftlimit : 4982689c958cSLi Xi dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits; 4983689c958cSLi Xi if (limit && buf->f_blocks > limit) { 4984689c958cSLi Xi curblock = dquot->dq_dqb.dqb_curspace >> sb->s_blocksize_bits; 4985689c958cSLi Xi buf->f_blocks = limit; 4986689c958cSLi Xi buf->f_bfree = buf->f_bavail = 4987689c958cSLi Xi (buf->f_blocks > curblock) ? 4988689c958cSLi Xi (buf->f_blocks - curblock) : 0; 4989689c958cSLi Xi } 4990689c958cSLi Xi 4991689c958cSLi Xi limit = dquot->dq_dqb.dqb_isoftlimit ? 4992689c958cSLi Xi dquot->dq_dqb.dqb_isoftlimit : 4993689c958cSLi Xi dquot->dq_dqb.dqb_ihardlimit; 4994689c958cSLi Xi if (limit && buf->f_files > limit) { 4995689c958cSLi Xi buf->f_files = limit; 4996689c958cSLi Xi buf->f_ffree = 4997689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 4998689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 4999689c958cSLi Xi } 5000689c958cSLi Xi 5001689c958cSLi Xi spin_unlock(&dq_data_lock); 5002689c958cSLi Xi dqput(dquot); 5003689c958cSLi Xi return 0; 5004689c958cSLi Xi } 5005689c958cSLi Xi #endif 5006689c958cSLi Xi 5007617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 5008ac27a0ecSDave Kleikamp { 5009ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 5010617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5011617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 501227dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 5013960cc398SPekka Enberg u64 fsid; 5014d02a9391SKazuya Mio s64 bfree; 501527dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 5016ac27a0ecSDave Kleikamp 5017952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 5018952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 5019ac27a0ecSDave Kleikamp 5020617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 5021ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 5022b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 502357042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 502457042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 5025d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 502657042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 502727dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 502827dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 502927dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 5030ac27a0ecSDave Kleikamp buf->f_bavail = 0; 5031ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 503252d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 5033617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 5034960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 5035960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 5036960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 5037960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 50380b8e58a1SAndreas Dilger 5039689c958cSLi Xi #ifdef CONFIG_QUOTA 5040689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 5041689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 5042689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 5043689c958cSLi Xi #endif 5044ac27a0ecSDave Kleikamp return 0; 5045ac27a0ecSDave Kleikamp } 5046ac27a0ecSDave Kleikamp 50470b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 50480b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 5049ac27a0ecSDave Kleikamp * Process 1 Process 2 5050617ba13bSMingming Cao * ext4_create() quota_sync() 5051dab291afSMingming Cao * jbd2_journal_start() write_dquot() 5052871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 5053dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 5054ac27a0ecSDave Kleikamp * 5055ac27a0ecSDave Kleikamp */ 5056ac27a0ecSDave Kleikamp 5057ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5058ac27a0ecSDave Kleikamp 5059ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 5060ac27a0ecSDave Kleikamp { 50614c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 5062ac27a0ecSDave Kleikamp } 5063ac27a0ecSDave Kleikamp 5064617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 5065ac27a0ecSDave Kleikamp { 5066ac27a0ecSDave Kleikamp int ret, err; 5067ac27a0ecSDave Kleikamp handle_t *handle; 5068ac27a0ecSDave Kleikamp struct inode *inode; 5069ac27a0ecSDave Kleikamp 5070ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 50719924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 5072617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 5073ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5074ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5075ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 5076617ba13bSMingming Cao err = ext4_journal_stop(handle); 5077ac27a0ecSDave Kleikamp if (!ret) 5078ac27a0ecSDave Kleikamp ret = err; 5079ac27a0ecSDave Kleikamp return ret; 5080ac27a0ecSDave Kleikamp } 5081ac27a0ecSDave Kleikamp 5082617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 5083ac27a0ecSDave Kleikamp { 5084ac27a0ecSDave Kleikamp int ret, err; 5085ac27a0ecSDave Kleikamp handle_t *handle; 5086ac27a0ecSDave Kleikamp 50879924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5088617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 5089ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5090ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5091ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 5092617ba13bSMingming Cao err = ext4_journal_stop(handle); 5093ac27a0ecSDave Kleikamp if (!ret) 5094ac27a0ecSDave Kleikamp ret = err; 5095ac27a0ecSDave Kleikamp return ret; 5096ac27a0ecSDave Kleikamp } 5097ac27a0ecSDave Kleikamp 5098617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 5099ac27a0ecSDave Kleikamp { 5100ac27a0ecSDave Kleikamp int ret, err; 5101ac27a0ecSDave Kleikamp handle_t *handle; 5102ac27a0ecSDave Kleikamp 51039924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5104617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 51059c3013e9SJan Kara if (IS_ERR(handle)) { 51069c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 51079c3013e9SJan Kara dquot_release(dquot); 5108ac27a0ecSDave Kleikamp return PTR_ERR(handle); 51099c3013e9SJan Kara } 5110ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 5111617ba13bSMingming Cao err = ext4_journal_stop(handle); 5112ac27a0ecSDave Kleikamp if (!ret) 5113ac27a0ecSDave Kleikamp ret = err; 5114ac27a0ecSDave Kleikamp return ret; 5115ac27a0ecSDave Kleikamp } 5116ac27a0ecSDave Kleikamp 5117617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 5118ac27a0ecSDave Kleikamp { 5119262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 5120262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5121262b4662SJan Kara 51222c8be6b2SJan Kara /* Are we journaling quotas? */ 5123e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) || 5124262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 5125ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 5126617ba13bSMingming Cao return ext4_write_dquot(dquot); 5127ac27a0ecSDave Kleikamp } else { 5128ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 5129ac27a0ecSDave Kleikamp } 5130ac27a0ecSDave Kleikamp } 5131ac27a0ecSDave Kleikamp 5132617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 5133ac27a0ecSDave Kleikamp { 5134ac27a0ecSDave Kleikamp int ret, err; 5135ac27a0ecSDave Kleikamp handle_t *handle; 5136ac27a0ecSDave Kleikamp 5137ac27a0ecSDave Kleikamp /* Data block + inode block */ 51382b0143b5SDavid Howells handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); 5139ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5140ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5141ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 5142617ba13bSMingming Cao err = ext4_journal_stop(handle); 5143ac27a0ecSDave Kleikamp if (!ret) 5144ac27a0ecSDave Kleikamp ret = err; 5145ac27a0ecSDave Kleikamp return ret; 5146ac27a0ecSDave Kleikamp } 5147ac27a0ecSDave Kleikamp 5148ac27a0ecSDave Kleikamp /* 5149ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 5150ac27a0ecSDave Kleikamp * the quota file and such... 5151ac27a0ecSDave Kleikamp */ 5152617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 5153ac27a0ecSDave Kleikamp { 5154287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 5155617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 5156ac27a0ecSDave Kleikamp } 5157ac27a0ecSDave Kleikamp 5158daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 5159daf647d2STheodore Ts'o { 5160daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 5161daf647d2STheodore Ts'o 5162daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 5163daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 5164daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 5165daf647d2STheodore Ts'o * because the name of the lock is set using the 5166daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 5167daf647d2STheodore Ts'o */ 5168daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 5169daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 5170daf647d2STheodore Ts'o } 5171daf647d2STheodore Ts'o 5172ac27a0ecSDave Kleikamp /* 5173ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 5174ac27a0ecSDave Kleikamp */ 5175617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 5176f00c9e44SJan Kara struct path *path) 5177ac27a0ecSDave Kleikamp { 5178ac27a0ecSDave Kleikamp int err; 5179ac27a0ecSDave Kleikamp 5180ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 5181ac27a0ecSDave Kleikamp return -EINVAL; 51820623543bSJan Kara 5183ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 5184d8c9584eSAl Viro if (path->dentry->d_sb != sb) 5185ac27a0ecSDave Kleikamp return -EXDEV; 51860623543bSJan Kara /* Journaling quota? */ 51870623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 51882b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 5189f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 5190b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 5191b31e1552SEric Sandeen "Quota file not on filesystem root. " 5192b31e1552SEric Sandeen "Journaled quota will not work"); 51930623543bSJan Kara } 51940623543bSJan Kara 51950623543bSJan Kara /* 51960623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 51970623543bSJan Kara * all updates to the file when we bypass pagecache... 51980623543bSJan Kara */ 51990390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 52002b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 52010623543bSJan Kara /* 52020623543bSJan Kara * We don't need to lock updates but journal_flush() could 52030623543bSJan Kara * otherwise be livelocked... 52040623543bSJan Kara */ 52050623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 52067ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 52070623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 5208f00c9e44SJan Kara if (err) 52097ffe1ea8SHidehiro Kawai return err; 52107ffe1ea8SHidehiro Kawai } 5211daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 5212daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 5213daf647d2STheodore Ts'o if (err) 5214daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, 5215daf647d2STheodore Ts'o I_DATA_SEM_NORMAL); 5216daf647d2STheodore Ts'o return err; 5217ac27a0ecSDave Kleikamp } 5218ac27a0ecSDave Kleikamp 52197c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 52207c319d32SAditya Kali unsigned int flags) 52217c319d32SAditya Kali { 52227c319d32SAditya Kali int err; 52237c319d32SAditya Kali struct inode *qf_inode; 5224a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 52257c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 5226689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 5227689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 52287c319d32SAditya Kali }; 52297c319d32SAditya Kali 5230e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 52317c319d32SAditya Kali 52327c319d32SAditya Kali if (!qf_inums[type]) 52337c319d32SAditya Kali return -EPERM; 52347c319d32SAditya Kali 52357c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 52367c319d32SAditya Kali if (IS_ERR(qf_inode)) { 52377c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 52387c319d32SAditya Kali return PTR_ERR(qf_inode); 52397c319d32SAditya Kali } 52407c319d32SAditya Kali 5241bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 5242bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 5243daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 52447c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 52457c319d32SAditya Kali iput(qf_inode); 5246daf647d2STheodore Ts'o if (err) 5247daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 52487c319d32SAditya Kali 52497c319d32SAditya Kali return err; 52507c319d32SAditya Kali } 52517c319d32SAditya Kali 52527c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 52537c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 52547c319d32SAditya Kali { 52557c319d32SAditya Kali int type, err = 0; 5256a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 52577c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 5258689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 5259689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 52607c319d32SAditya Kali }; 5261*49da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 5262*49da9392SJan Kara test_opt(sb, USRQUOTA), 5263*49da9392SJan Kara test_opt(sb, GRPQUOTA), 5264*49da9392SJan Kara test_opt(sb, PRJQUOTA), 5265*49da9392SJan Kara }; 52667c319d32SAditya Kali 52677c319d32SAditya Kali sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; 5268a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 52697c319d32SAditya Kali if (qf_inums[type]) { 52707c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 5271*49da9392SJan Kara DQUOT_USAGE_ENABLED | 5272*49da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 52737c319d32SAditya Kali if (err) { 52747c319d32SAditya Kali ext4_warning(sb, 527572ba7450STheodore Ts'o "Failed to enable quota tracking " 527672ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 527772ba7450STheodore Ts'o "e2fsck to fix.", type, err); 52787c319d32SAditya Kali return err; 52797c319d32SAditya Kali } 52807c319d32SAditya Kali } 52817c319d32SAditya Kali } 52827c319d32SAditya Kali return 0; 52837c319d32SAditya Kali } 52847c319d32SAditya Kali 5285ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5286ca0e05e4SDmitry Monakhov { 528721f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 528821f97697SJan Kara handle_t *handle; 528921f97697SJan Kara 529087009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 529187009d86SDmitry Monakhov * Caller already holds s_umount sem */ 529287009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5293ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5294ca0e05e4SDmitry Monakhov 52950b268590SAmir Goldstein if (!inode) 52960b268590SAmir Goldstein goto out; 52970b268590SAmir Goldstein 529821f97697SJan Kara /* Update modification times of quota files when userspace can 529921f97697SJan Kara * start looking at them */ 53009924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 530121f97697SJan Kara if (IS_ERR(handle)) 530221f97697SJan Kara goto out; 530321f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 530421f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 530521f97697SJan Kara ext4_journal_stop(handle); 530621f97697SJan Kara 530721f97697SJan Kara out: 5308ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5309ca0e05e4SDmitry Monakhov } 5310ca0e05e4SDmitry Monakhov 5311ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5312ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5313ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5314ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5315617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5316ac27a0ecSDave Kleikamp size_t len, loff_t off) 5317ac27a0ecSDave Kleikamp { 5318ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5319725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5320ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5321ac27a0ecSDave Kleikamp int tocopy; 5322ac27a0ecSDave Kleikamp size_t toread; 5323ac27a0ecSDave Kleikamp struct buffer_head *bh; 5324ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5325ac27a0ecSDave Kleikamp 5326ac27a0ecSDave Kleikamp if (off > i_size) 5327ac27a0ecSDave Kleikamp return 0; 5328ac27a0ecSDave Kleikamp if (off+len > i_size) 5329ac27a0ecSDave Kleikamp len = i_size-off; 5330ac27a0ecSDave Kleikamp toread = len; 5331ac27a0ecSDave Kleikamp while (toread > 0) { 5332ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5333ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 53341c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 53351c215028STheodore Ts'o if (IS_ERR(bh)) 53361c215028STheodore Ts'o return PTR_ERR(bh); 5337ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5338ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5339ac27a0ecSDave Kleikamp else 5340ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5341ac27a0ecSDave Kleikamp brelse(bh); 5342ac27a0ecSDave Kleikamp offset = 0; 5343ac27a0ecSDave Kleikamp toread -= tocopy; 5344ac27a0ecSDave Kleikamp data += tocopy; 5345ac27a0ecSDave Kleikamp blk++; 5346ac27a0ecSDave Kleikamp } 5347ac27a0ecSDave Kleikamp return len; 5348ac27a0ecSDave Kleikamp } 5349ac27a0ecSDave Kleikamp 5350ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5351ac27a0ecSDave Kleikamp * enough credits) */ 5352617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5353ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5354ac27a0ecSDave Kleikamp { 5355ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5356725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 53571c215028STheodore Ts'o int err, offset = off & (sb->s_blocksize - 1); 5358c5e298aeSTheodore Ts'o int retries = 0; 5359ac27a0ecSDave Kleikamp struct buffer_head *bh; 5360ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5361ac27a0ecSDave Kleikamp 53620390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5363b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5364b31e1552SEric Sandeen " cancelled because transaction is not started", 53659c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 53669c3013e9SJan Kara return -EIO; 53679c3013e9SJan Kara } 536867eeb568SDmitry Monakhov /* 536967eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 537067eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 537167eeb568SDmitry Monakhov */ 537267eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 537367eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 537467eeb568SDmitry Monakhov " cancelled because not block aligned", 537567eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 537667eeb568SDmitry Monakhov return -EIO; 537767eeb568SDmitry Monakhov } 537867eeb568SDmitry Monakhov 5379c5e298aeSTheodore Ts'o do { 5380c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 5381c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 5382c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 5383c5e298aeSTheodore Ts'o } while (IS_ERR(bh) && (PTR_ERR(bh) == -ENOSPC) && 5384c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 53851c215028STheodore Ts'o if (IS_ERR(bh)) 53861c215028STheodore Ts'o return PTR_ERR(bh); 5387ac27a0ecSDave Kleikamp if (!bh) 5388ac27a0ecSDave Kleikamp goto out; 53895d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 5390617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5391ac27a0ecSDave Kleikamp if (err) { 5392ac27a0ecSDave Kleikamp brelse(bh); 53931c215028STheodore Ts'o return err; 5394ac27a0ecSDave Kleikamp } 5395ac27a0ecSDave Kleikamp lock_buffer(bh); 539667eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5397ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5398ac27a0ecSDave Kleikamp unlock_buffer(bh); 53990390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5400ac27a0ecSDave Kleikamp brelse(bh); 5401ac27a0ecSDave Kleikamp out: 540267eeb568SDmitry Monakhov if (inode->i_size < off + len) { 540367eeb568SDmitry Monakhov i_size_write(inode, off + len); 5404617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5405617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 540621f97697SJan Kara } 540767eeb568SDmitry Monakhov return len; 5408ac27a0ecSDave Kleikamp } 5409ac27a0ecSDave Kleikamp 54108f0e8746STheodore Ts'o static int ext4_get_next_id(struct super_block *sb, struct kqid *qid) 54118f0e8746STheodore Ts'o { 54128f0e8746STheodore Ts'o const struct quota_format_ops *ops; 54138f0e8746STheodore Ts'o 54148f0e8746STheodore Ts'o if (!sb_has_quota_loaded(sb, qid->type)) 54158f0e8746STheodore Ts'o return -ESRCH; 54168f0e8746STheodore Ts'o ops = sb_dqopt(sb)->ops[qid->type]; 54178f0e8746STheodore Ts'o if (!ops || !ops->get_next_id) 54188f0e8746STheodore Ts'o return -ENOSYS; 54198f0e8746STheodore Ts'o return dquot_get_next_id(sb, qid); 54208f0e8746STheodore Ts'o } 5421ac27a0ecSDave Kleikamp #endif 5422ac27a0ecSDave Kleikamp 5423152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5424152a0836SAl Viro const char *dev_name, void *data) 5425ac27a0ecSDave Kleikamp { 5426152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5427ac27a0ecSDave Kleikamp } 5428ac27a0ecSDave Kleikamp 5429c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 543024b58424STheodore Ts'o static inline void register_as_ext2(void) 543124b58424STheodore Ts'o { 543224b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 543324b58424STheodore Ts'o if (err) 543424b58424STheodore Ts'o printk(KERN_WARNING 543524b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 543624b58424STheodore Ts'o } 543724b58424STheodore Ts'o 543824b58424STheodore Ts'o static inline void unregister_as_ext2(void) 543924b58424STheodore Ts'o { 544024b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 544124b58424STheodore Ts'o } 54422035e776STheodore Ts'o 54432035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 54442035e776STheodore Ts'o { 5445e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 54462035e776STheodore Ts'o return 0; 54472035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 54482035e776STheodore Ts'o return 1; 5449e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 54502035e776STheodore Ts'o return 0; 54512035e776STheodore Ts'o return 1; 54522035e776STheodore Ts'o } 545324b58424STheodore Ts'o #else 545424b58424STheodore Ts'o static inline void register_as_ext2(void) { } 545524b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 54562035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 545724b58424STheodore Ts'o #endif 545824b58424STheodore Ts'o 545924b58424STheodore Ts'o static inline void register_as_ext3(void) 546024b58424STheodore Ts'o { 546124b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 546224b58424STheodore Ts'o if (err) 546324b58424STheodore Ts'o printk(KERN_WARNING 546424b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 546524b58424STheodore Ts'o } 546624b58424STheodore Ts'o 546724b58424STheodore Ts'o static inline void unregister_as_ext3(void) 546824b58424STheodore Ts'o { 546924b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 547024b58424STheodore Ts'o } 54712035e776STheodore Ts'o 54722035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 54732035e776STheodore Ts'o { 5474e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 54752035e776STheodore Ts'o return 0; 5476e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 54772035e776STheodore Ts'o return 0; 54782035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 54792035e776STheodore Ts'o return 1; 5480e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 54812035e776STheodore Ts'o return 0; 54822035e776STheodore Ts'o return 1; 54832035e776STheodore Ts'o } 548424b58424STheodore Ts'o 548503010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5486ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 548703010a33STheodore Ts'o .name = "ext4", 5488152a0836SAl Viro .mount = ext4_mount, 5489ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5490ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5491ac27a0ecSDave Kleikamp }; 54927f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 5493ac27a0ecSDave Kleikamp 5494e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5495e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5496e9e3bcecSEric Sandeen 54975dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5498ac27a0ecSDave Kleikamp { 5499e9e3bcecSEric Sandeen int i, err; 5500c9de560dSAlex Tomas 5501e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 550207c0c5d8SAl Viro ext4_li_info = NULL; 550307c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 550407c0c5d8SAl Viro 55059a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 550612e9b892SDmitry Monakhov ext4_check_flag_values(); 5507e9e3bcecSEric Sandeen 5508e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 5509e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5510e9e3bcecSEric Sandeen 551151865fdaSZheng Liu err = ext4_init_es(); 55126fd058f7STheodore Ts'o if (err) 55136fd058f7STheodore Ts'o return err; 551451865fdaSZheng Liu 551551865fdaSZheng Liu err = ext4_init_pageio(); 551651865fdaSZheng Liu if (err) 5517b5799018STheodore Ts'o goto out5; 551851865fdaSZheng Liu 55195dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5520bd2d0210STheodore Ts'o if (err) 5521b5799018STheodore Ts'o goto out4; 5522857ac889SLukas Czerner 5523b5799018STheodore Ts'o err = ext4_init_sysfs(); 5524dd68314cSTheodore Ts'o if (err) 5525b5799018STheodore Ts'o goto out3; 5526857ac889SLukas Czerner 55275dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5528ac27a0ecSDave Kleikamp if (err) 5529c9de560dSAlex Tomas goto out2; 5530ac27a0ecSDave Kleikamp err = init_inodecache(); 5531ac27a0ecSDave Kleikamp if (err) 5532ac27a0ecSDave Kleikamp goto out1; 553324b58424STheodore Ts'o register_as_ext3(); 55342035e776STheodore Ts'o register_as_ext2(); 553503010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5536ac27a0ecSDave Kleikamp if (err) 5537ac27a0ecSDave Kleikamp goto out; 5538bfff6873SLukas Czerner 5539ac27a0ecSDave Kleikamp return 0; 5540ac27a0ecSDave Kleikamp out: 554124b58424STheodore Ts'o unregister_as_ext2(); 554224b58424STheodore Ts'o unregister_as_ext3(); 5543ac27a0ecSDave Kleikamp destroy_inodecache(); 5544ac27a0ecSDave Kleikamp out1: 55455dabfc78STheodore Ts'o ext4_exit_mballoc(); 55469c191f70ST Makphaibulchoke out2: 5547b5799018STheodore Ts'o ext4_exit_sysfs(); 5548b5799018STheodore Ts'o out3: 5549dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5550b5799018STheodore Ts'o out4: 55515dabfc78STheodore Ts'o ext4_exit_pageio(); 5552b5799018STheodore Ts'o out5: 555351865fdaSZheng Liu ext4_exit_es(); 555451865fdaSZheng Liu 5555ac27a0ecSDave Kleikamp return err; 5556ac27a0ecSDave Kleikamp } 5557ac27a0ecSDave Kleikamp 55585dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5559ac27a0ecSDave Kleikamp { 5560bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 556124b58424STheodore Ts'o unregister_as_ext2(); 556224b58424STheodore Ts'o unregister_as_ext3(); 556303010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5564ac27a0ecSDave Kleikamp destroy_inodecache(); 55655dabfc78STheodore Ts'o ext4_exit_mballoc(); 5566b5799018STheodore Ts'o ext4_exit_sysfs(); 55675dabfc78STheodore Ts'o ext4_exit_system_zone(); 55685dabfc78STheodore Ts'o ext4_exit_pageio(); 5569dd12ed14SEric Sandeen ext4_exit_es(); 5570ac27a0ecSDave Kleikamp } 5571ac27a0ecSDave Kleikamp 5572ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 557383982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5574ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 55755dabfc78STheodore Ts'o module_init(ext4_init_fs) 55765dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5577