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 1026*a7550b30SJaegeuk 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 1093*a7550b30SJaegeuk Kim #ifdef CONFIG_EXT4_FS_ENCRYPTION 1094*a7550b30SJaegeuk Kim static int ext4_get_context(struct inode *inode, void *ctx, size_t len) 1095*a7550b30SJaegeuk Kim { 1096*a7550b30SJaegeuk Kim return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, 1097*a7550b30SJaegeuk Kim EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); 1098*a7550b30SJaegeuk Kim } 1099*a7550b30SJaegeuk Kim 1100*a7550b30SJaegeuk Kim static int ext4_key_prefix(struct inode *inode, u8 **key) 1101*a7550b30SJaegeuk Kim { 1102*a7550b30SJaegeuk Kim *key = EXT4_SB(inode->i_sb)->key_prefix; 1103*a7550b30SJaegeuk Kim return EXT4_SB(inode->i_sb)->key_prefix_size; 1104*a7550b30SJaegeuk Kim } 1105*a7550b30SJaegeuk Kim 1106*a7550b30SJaegeuk Kim static int ext4_prepare_context(struct inode *inode) 1107*a7550b30SJaegeuk Kim { 1108*a7550b30SJaegeuk Kim return ext4_convert_inline_data(inode); 1109*a7550b30SJaegeuk Kim } 1110*a7550b30SJaegeuk Kim 1111*a7550b30SJaegeuk Kim static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, 1112*a7550b30SJaegeuk Kim void *fs_data) 1113*a7550b30SJaegeuk Kim { 1114*a7550b30SJaegeuk Kim handle_t *handle; 1115*a7550b30SJaegeuk Kim int res, res2; 1116*a7550b30SJaegeuk Kim 1117*a7550b30SJaegeuk Kim /* fs_data is null when internally used. */ 1118*a7550b30SJaegeuk Kim if (fs_data) { 1119*a7550b30SJaegeuk Kim res = ext4_xattr_set(inode, EXT4_XATTR_INDEX_ENCRYPTION, 1120*a7550b30SJaegeuk Kim EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, 1121*a7550b30SJaegeuk Kim len, 0); 1122*a7550b30SJaegeuk Kim if (!res) { 1123*a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1124*a7550b30SJaegeuk Kim ext4_clear_inode_state(inode, 1125*a7550b30SJaegeuk Kim EXT4_STATE_MAY_INLINE_DATA); 1126*a7550b30SJaegeuk Kim } 1127*a7550b30SJaegeuk Kim return res; 1128*a7550b30SJaegeuk Kim } 1129*a7550b30SJaegeuk Kim 1130*a7550b30SJaegeuk Kim handle = ext4_journal_start(inode, EXT4_HT_MISC, 1131*a7550b30SJaegeuk Kim ext4_jbd2_credits_xattr(inode)); 1132*a7550b30SJaegeuk Kim if (IS_ERR(handle)) 1133*a7550b30SJaegeuk Kim return PTR_ERR(handle); 1134*a7550b30SJaegeuk Kim 1135*a7550b30SJaegeuk Kim res = ext4_xattr_set(inode, EXT4_XATTR_INDEX_ENCRYPTION, 1136*a7550b30SJaegeuk Kim EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, 1137*a7550b30SJaegeuk Kim len, 0); 1138*a7550b30SJaegeuk Kim if (!res) { 1139*a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1140*a7550b30SJaegeuk Kim res = ext4_mark_inode_dirty(handle, inode); 1141*a7550b30SJaegeuk Kim if (res) 1142*a7550b30SJaegeuk Kim EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); 1143*a7550b30SJaegeuk Kim } 1144*a7550b30SJaegeuk Kim res2 = ext4_journal_stop(handle); 1145*a7550b30SJaegeuk Kim if (!res) 1146*a7550b30SJaegeuk Kim res = res2; 1147*a7550b30SJaegeuk Kim return res; 1148*a7550b30SJaegeuk Kim } 1149*a7550b30SJaegeuk Kim 1150*a7550b30SJaegeuk Kim static int ext4_dummy_context(struct inode *inode) 1151*a7550b30SJaegeuk Kim { 1152*a7550b30SJaegeuk Kim return DUMMY_ENCRYPTION_ENABLED(EXT4_SB(inode->i_sb)); 1153*a7550b30SJaegeuk Kim } 1154*a7550b30SJaegeuk Kim 1155*a7550b30SJaegeuk Kim static unsigned ext4_max_namelen(struct inode *inode) 1156*a7550b30SJaegeuk Kim { 1157*a7550b30SJaegeuk Kim return S_ISLNK(inode->i_mode) ? inode->i_sb->s_blocksize : 1158*a7550b30SJaegeuk Kim EXT4_NAME_LEN; 1159*a7550b30SJaegeuk Kim } 1160*a7550b30SJaegeuk Kim 1161*a7550b30SJaegeuk Kim static struct fscrypt_operations ext4_cryptops = { 1162*a7550b30SJaegeuk Kim .get_context = ext4_get_context, 1163*a7550b30SJaegeuk Kim .key_prefix = ext4_key_prefix, 1164*a7550b30SJaegeuk Kim .prepare_context = ext4_prepare_context, 1165*a7550b30SJaegeuk Kim .set_context = ext4_set_context, 1166*a7550b30SJaegeuk Kim .dummy_context = ext4_dummy_context, 1167*a7550b30SJaegeuk Kim .is_encrypted = ext4_encrypted_inode, 1168*a7550b30SJaegeuk Kim .empty_dir = ext4_empty_dir, 1169*a7550b30SJaegeuk Kim .max_namelen = ext4_max_namelen, 1170*a7550b30SJaegeuk Kim }; 1171*a7550b30SJaegeuk Kim #else 1172*a7550b30SJaegeuk Kim static struct fscrypt_operations ext4_cryptops = { 1173*a7550b30SJaegeuk Kim .is_encrypted = ext4_encrypted_inode, 1174*a7550b30SJaegeuk Kim }; 1175*a7550b30SJaegeuk Kim #endif 1176*a7550b30SJaegeuk 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, 1270923ae0ffSRoss Zwisler Opt_usrquota, Opt_grpquota, 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"}, 1330ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 133106705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 133206705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 133325ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1334923ae0ffSRoss Zwisler {Opt_dax, "dax"}, 1335c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 133664769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1337a26f4992STheodore Ts'o {Opt_lazytime, "lazytime"}, 1338a26f4992STheodore Ts'o {Opt_nolazytime, "nolazytime"}, 1339dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 134036ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 134136ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 13426fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 13436fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1344240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1345b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1346afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 134706705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 134806705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1349744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1350744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 13515328e635SEric Sandeen {Opt_discard, "discard"}, 13525328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1353fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1354fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1355fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1356df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 13576ddb2447STheodore Ts'o {Opt_test_dummy_encryption, "test_dummy_encryption"}, 1358c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1359c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1360c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1361c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1362c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1363f3f12faaSJosef Bacik {Opt_err, NULL}, 1364ac27a0ecSDave Kleikamp }; 1365ac27a0ecSDave Kleikamp 1366617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1367ac27a0ecSDave Kleikamp { 1368617ba13bSMingming Cao ext4_fsblk_t sb_block; 1369ac27a0ecSDave Kleikamp char *options = (char *) *data; 1370ac27a0ecSDave Kleikamp 1371ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1372ac27a0ecSDave Kleikamp return 1; /* Default location */ 13730b8e58a1SAndreas Dilger 1374ac27a0ecSDave Kleikamp options += 3; 13750b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1376ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1377ac27a0ecSDave Kleikamp if (*options && *options != ',') { 13784776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1379ac27a0ecSDave Kleikamp (char *) *data); 1380ac27a0ecSDave Kleikamp return 1; 1381ac27a0ecSDave Kleikamp } 1382ac27a0ecSDave Kleikamp if (*options == ',') 1383ac27a0ecSDave Kleikamp options++; 1384ac27a0ecSDave Kleikamp *data = (void *) options; 13850b8e58a1SAndreas Dilger 1386ac27a0ecSDave Kleikamp return sb_block; 1387ac27a0ecSDave Kleikamp } 1388ac27a0ecSDave Kleikamp 1389b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1390437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1391437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1392b3881f74STheodore Ts'o 139356c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 139456c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 139556c50f11SDmitry Monakhov { 139656c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 139756c50f11SDmitry Monakhov char *qname; 139803dafb5fSChen Gang int ret = -1; 139956c50f11SDmitry Monakhov 140056c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 140156c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 140256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 140356c50f11SDmitry Monakhov "Cannot change journaled " 140456c50f11SDmitry Monakhov "quota options when quota turned on"); 140557f73c2cSTheodore Ts'o return -1; 140656c50f11SDmitry Monakhov } 1407e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1408c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, "Journaled quota options " 1409c325a67cSTheodore Ts'o "ignored when QUOTA feature is enabled"); 1410c325a67cSTheodore Ts'o return 1; 1411262b4662SJan Kara } 141256c50f11SDmitry Monakhov qname = match_strdup(args); 141356c50f11SDmitry Monakhov if (!qname) { 141456c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 141556c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 141657f73c2cSTheodore Ts'o return -1; 141756c50f11SDmitry Monakhov } 141803dafb5fSChen Gang if (sbi->s_qf_names[qtype]) { 141903dafb5fSChen Gang if (strcmp(sbi->s_qf_names[qtype], qname) == 0) 142003dafb5fSChen Gang ret = 1; 142103dafb5fSChen Gang else 142256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 142303dafb5fSChen Gang "%s quota file already specified", 142403dafb5fSChen Gang QTYPE2NAME(qtype)); 142503dafb5fSChen Gang goto errout; 142656c50f11SDmitry Monakhov } 142703dafb5fSChen Gang if (strchr(qname, '/')) { 142856c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 142956c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 143003dafb5fSChen Gang goto errout; 143156c50f11SDmitry Monakhov } 143203dafb5fSChen Gang sbi->s_qf_names[qtype] = qname; 1433fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 143456c50f11SDmitry Monakhov return 1; 143503dafb5fSChen Gang errout: 143603dafb5fSChen Gang kfree(qname); 143703dafb5fSChen Gang return ret; 143856c50f11SDmitry Monakhov } 143956c50f11SDmitry Monakhov 144056c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 144156c50f11SDmitry Monakhov { 144256c50f11SDmitry Monakhov 144356c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 144456c50f11SDmitry Monakhov 144556c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 144656c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 144756c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 144856c50f11SDmitry Monakhov " when quota turned on"); 144957f73c2cSTheodore Ts'o return -1; 145056c50f11SDmitry Monakhov } 145103dafb5fSChen Gang kfree(sbi->s_qf_names[qtype]); 145256c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 145356c50f11SDmitry Monakhov return 1; 145456c50f11SDmitry Monakhov } 145556c50f11SDmitry Monakhov #endif 145656c50f11SDmitry Monakhov 145726092bf5STheodore Ts'o #define MOPT_SET 0x0001 145826092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 145926092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 146026092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 146126092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 146226092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 146326092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 146426092bf5STheodore Ts'o #define MOPT_Q 0 146526092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 146626092bf5STheodore Ts'o #else 146726092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 146826092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 146926092bf5STheodore Ts'o #endif 147026092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 14718dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 14728dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 14738dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1474ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 147526092bf5STheodore Ts'o 147626092bf5STheodore Ts'o static const struct mount_opts { 147726092bf5STheodore Ts'o int token; 147826092bf5STheodore Ts'o int mount_opt; 147926092bf5STheodore Ts'o int flags; 148026092bf5STheodore Ts'o } ext4_mount_opts[] = { 148126092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 148226092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 148326092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 148426092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 148526092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 148626092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 14878dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 14888dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 14898dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 14908dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 149126092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 149226092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 14938dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 14948dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 14958dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 149659d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1497c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1498c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 14998dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 15001e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 150126092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 15028dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 15031e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 15048dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 150526092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 150626092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 150726092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 15088dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 15097915a861SAles Novak MOPT_NO_EXT2}, 15108dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 15117915a861SAles Novak MOPT_NO_EXT2}, 151226092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 151326092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 151426092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 151526092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 151626092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 151726092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 151826092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 151926092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 152026092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 152126092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 1522923ae0ffSRoss Zwisler {Opt_dax, EXT4_MOUNT_DAX, MOPT_SET}, 152326092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 15240efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 15250efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 15265ba92bcfSCarlos Maiolino {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 15275ba92bcfSCarlos Maiolino {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, 15285ba92bcfSCarlos Maiolino {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 15298dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 15308dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 15318dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 15328dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 153326092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 153426092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 153526092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 153626092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 153726092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 153826092bf5STheodore Ts'o #else 153926092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 154026092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 154126092bf5STheodore Ts'o #endif 154226092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 154326092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 154426092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 154526092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 154626092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 154726092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 154826092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 154926092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 155026092bf5STheodore Ts'o EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, 155126092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 155226092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 155326092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 155426092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 155526092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 155626092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 155726092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1558df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 15596ddb2447STheodore Ts'o {Opt_test_dummy_encryption, 0, MOPT_GTE0}, 156026092bf5STheodore Ts'o {Opt_err, 0, 0} 156126092bf5STheodore Ts'o }; 156226092bf5STheodore Ts'o 156326092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 156426092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 156526092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 156626092bf5STheodore Ts'o { 156726092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 156826092bf5STheodore Ts'o const struct mount_opts *m; 156908cefc7aSEric W. Biederman kuid_t uid; 157008cefc7aSEric W. Biederman kgid_t gid; 157126092bf5STheodore Ts'o int arg = 0; 157226092bf5STheodore Ts'o 157357f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 157457f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 157557f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 157657f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 157757f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 157857f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 157957f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 158057f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 158157f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 158257f73c2cSTheodore Ts'o #endif 158326092bf5STheodore Ts'o switch (token) { 1584f7048605STheodore Ts'o case Opt_noacl: 1585f7048605STheodore Ts'o case Opt_nouser_xattr: 1586f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1587f7048605STheodore Ts'o break; 158826092bf5STheodore Ts'o case Opt_sb: 158926092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 159026092bf5STheodore Ts'o case Opt_removed: 15915f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 159226092bf5STheodore Ts'o return 1; 159326092bf5STheodore Ts'o case Opt_abort: 159426092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 159526092bf5STheodore Ts'o return 1; 159626092bf5STheodore Ts'o case Opt_i_version: 159726092bf5STheodore Ts'o sb->s_flags |= MS_I_VERSION; 159826092bf5STheodore Ts'o return 1; 1599a26f4992STheodore Ts'o case Opt_lazytime: 1600a26f4992STheodore Ts'o sb->s_flags |= MS_LAZYTIME; 1601a26f4992STheodore Ts'o return 1; 1602a26f4992STheodore Ts'o case Opt_nolazytime: 1603a26f4992STheodore Ts'o sb->s_flags &= ~MS_LAZYTIME; 1604a26f4992STheodore Ts'o return 1; 160526092bf5STheodore Ts'o } 160626092bf5STheodore Ts'o 16075f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 16085f3633e3SJan Kara if (token == m->token) 16095f3633e3SJan Kara break; 16105f3633e3SJan Kara 16115f3633e3SJan Kara if (m->token == Opt_err) { 16125f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 16135f3633e3SJan Kara "or missing value", opt); 16145f3633e3SJan Kara return -1; 16155f3633e3SJan Kara } 16165f3633e3SJan Kara 16178dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 16188dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 16198dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 16208dc0aa8cSTheodore Ts'o return -1; 16218dc0aa8cSTheodore Ts'o } 16228dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 16238dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 16248dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 16258dc0aa8cSTheodore Ts'o return -1; 16268dc0aa8cSTheodore Ts'o } 16278dc0aa8cSTheodore Ts'o 1628ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 16290efb3b23SJan Kara return -1; 163026092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 163126092bf5STheodore Ts'o return -1; 1632c93cf2d7SDmitry Monakhov if (m->flags & MOPT_EXPLICIT) { 1633c93cf2d7SDmitry Monakhov if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 163426092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 16351e381f60SDmitry Monakhov } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 16361e381f60SDmitry Monakhov set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM); 1637c93cf2d7SDmitry Monakhov } else 1638c93cf2d7SDmitry Monakhov return -1; 1639c93cf2d7SDmitry Monakhov } 164026092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 164126092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 164226092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 164326092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 164426092bf5STheodore Ts'o "options when quota turned on"); 164526092bf5STheodore Ts'o return -1; 164626092bf5STheodore Ts'o } 164726092bf5STheodore Ts'o 164826092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 164926092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 165026092bf5STheodore Ts'o } else if (token == Opt_commit) { 165126092bf5STheodore Ts'o if (arg == 0) 165226092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 165326092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 165426092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 165526092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 165626092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 165726092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 165826092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1659e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1660e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1661e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1662e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 166326092bf5STheodore Ts'o return -1; 166426092bf5STheodore Ts'o } 166526092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 166626092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 166726092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 166826092bf5STheodore Ts'o if (!args->from) 166926092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 167026092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1671df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1672df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 167326092bf5STheodore Ts'o } else if (token == Opt_stripe) { 167426092bf5STheodore Ts'o sbi->s_stripe = arg; 16750efb3b23SJan Kara } else if (token == Opt_resuid) { 16760efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 16770efb3b23SJan Kara if (!uid_valid(uid)) { 16785f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 16790efb3b23SJan Kara return -1; 16800efb3b23SJan Kara } 16810efb3b23SJan Kara sbi->s_resuid = uid; 16820efb3b23SJan Kara } else if (token == Opt_resgid) { 16830efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 16840efb3b23SJan Kara if (!gid_valid(gid)) { 16855f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 16860efb3b23SJan Kara return -1; 16870efb3b23SJan Kara } 16880efb3b23SJan Kara sbi->s_resgid = gid; 16890efb3b23SJan Kara } else if (token == Opt_journal_dev) { 16900efb3b23SJan Kara if (is_remount) { 16910efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 16920efb3b23SJan Kara "Cannot specify journal on remount"); 16930efb3b23SJan Kara return -1; 16940efb3b23SJan Kara } 16950efb3b23SJan Kara *journal_devnum = arg; 1696ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 1697ad4eec61SEric Sandeen char *journal_path; 1698ad4eec61SEric Sandeen struct inode *journal_inode; 1699ad4eec61SEric Sandeen struct path path; 1700ad4eec61SEric Sandeen int error; 1701ad4eec61SEric Sandeen 1702ad4eec61SEric Sandeen if (is_remount) { 1703ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 1704ad4eec61SEric Sandeen "Cannot specify journal on remount"); 1705ad4eec61SEric Sandeen return -1; 1706ad4eec61SEric Sandeen } 1707ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 1708ad4eec61SEric Sandeen if (!journal_path) { 1709ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 1710ad4eec61SEric Sandeen "journal device string"); 1711ad4eec61SEric Sandeen return -1; 1712ad4eec61SEric Sandeen } 1713ad4eec61SEric Sandeen 1714ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 1715ad4eec61SEric Sandeen if (error) { 1716ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 1717ad4eec61SEric Sandeen "journal device path: error %d", error); 1718ad4eec61SEric Sandeen kfree(journal_path); 1719ad4eec61SEric Sandeen return -1; 1720ad4eec61SEric Sandeen } 1721ad4eec61SEric Sandeen 17222b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 1723ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 1724ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 1725ad4eec61SEric Sandeen "is not a block device", journal_path); 1726ad4eec61SEric Sandeen path_put(&path); 1727ad4eec61SEric Sandeen kfree(journal_path); 1728ad4eec61SEric Sandeen return -1; 1729ad4eec61SEric Sandeen } 1730ad4eec61SEric Sandeen 1731ad4eec61SEric Sandeen *journal_devnum = new_encode_dev(journal_inode->i_rdev); 1732ad4eec61SEric Sandeen path_put(&path); 1733ad4eec61SEric Sandeen kfree(journal_path); 17340efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 17350efb3b23SJan Kara if (arg > 7) { 17365f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 17370efb3b23SJan Kara " (must be 0-7)"); 17380efb3b23SJan Kara return -1; 17390efb3b23SJan Kara } 17400efb3b23SJan Kara *journal_ioprio = 17410efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 17426ddb2447STheodore Ts'o } else if (token == Opt_test_dummy_encryption) { 17436ddb2447STheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 17446ddb2447STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION; 17456ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 17466ddb2447STheodore Ts'o "Test dummy encryption mode enabled"); 17476ddb2447STheodore Ts'o #else 17486ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 17496ddb2447STheodore Ts'o "Test dummy encryption mount option ignored"); 17506ddb2447STheodore Ts'o #endif 175126092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 175226092bf5STheodore Ts'o if (is_remount) { 175326092bf5STheodore Ts'o if (!sbi->s_journal) 175426092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 17555f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 175626092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 175726092bf5STheodore Ts'o "Cannot change data mode on remount"); 175826092bf5STheodore Ts'o return -1; 175926092bf5STheodore Ts'o } 176026092bf5STheodore Ts'o } else { 176126092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 176226092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 176326092bf5STheodore Ts'o } 176426092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 176526092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 176626092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 176726092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 17685f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 17695f3633e3SJan Kara "quota options when quota turned on"); 177026092bf5STheodore Ts'o return -1; 177126092bf5STheodore Ts'o } 1772e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1773c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, 1774c325a67cSTheodore Ts'o "Quota format mount options ignored " 1775262b4662SJan Kara "when QUOTA feature is enabled"); 1776c325a67cSTheodore Ts'o return 1; 1777262b4662SJan Kara } 177826092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 177926092bf5STheodore Ts'o #endif 1780923ae0ffSRoss Zwisler } else if (token == Opt_dax) { 1781ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 1782ef83b6e8SDan Williams ext4_msg(sb, KERN_WARNING, 1783ef83b6e8SDan Williams "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); 1784ef83b6e8SDan Williams sbi->s_mount_opt |= m->mount_opt; 1785ef83b6e8SDan Williams #else 1786923ae0ffSRoss Zwisler ext4_msg(sb, KERN_INFO, "dax option not supported"); 1787923ae0ffSRoss Zwisler return -1; 1788923ae0ffSRoss Zwisler #endif 17897915a861SAles Novak } else if (token == Opt_data_err_abort) { 17907915a861SAles Novak sbi->s_mount_opt |= m->mount_opt; 17917915a861SAles Novak } else if (token == Opt_data_err_ignore) { 17927915a861SAles Novak sbi->s_mount_opt &= ~m->mount_opt; 179326092bf5STheodore Ts'o } else { 179426092bf5STheodore Ts'o if (!args->from) 179526092bf5STheodore Ts'o arg = 1; 179626092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 179726092bf5STheodore Ts'o arg = !arg; 179826092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 179926092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 180026092bf5STheodore Ts'o "buggy handling of option %s", opt); 180126092bf5STheodore Ts'o WARN_ON(1); 180226092bf5STheodore Ts'o return -1; 180326092bf5STheodore Ts'o } 180426092bf5STheodore Ts'o if (arg != 0) 180526092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 180626092bf5STheodore Ts'o else 180726092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 180826092bf5STheodore Ts'o } 180926092bf5STheodore Ts'o return 1; 181026092bf5STheodore Ts'o } 181126092bf5STheodore Ts'o 1812ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1813c3191067STheodore Ts'o unsigned long *journal_devnum, 1814b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1815661aa520SEric Sandeen int is_remount) 1816ac27a0ecSDave Kleikamp { 1817617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1818ac27a0ecSDave Kleikamp char *p; 1819ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 182026092bf5STheodore Ts'o int token; 1821ac27a0ecSDave Kleikamp 1822ac27a0ecSDave Kleikamp if (!options) 1823ac27a0ecSDave Kleikamp return 1; 1824ac27a0ecSDave Kleikamp 1825ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1826ac27a0ecSDave Kleikamp if (!*p) 1827ac27a0ecSDave Kleikamp continue; 182815121c18SEric Sandeen /* 182915121c18SEric Sandeen * Initialize args struct so we know whether arg was 183015121c18SEric Sandeen * found; some options take optional arguments. 183115121c18SEric Sandeen */ 1832caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 1833ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 183426092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 183526092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1836ac27a0ecSDave Kleikamp return 0; 1837ac27a0ecSDave Kleikamp } 1838ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1839e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) && 1840262b4662SJan Kara (test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) { 1841c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, "Quota feature enabled, usrquota and grpquota " 1842c325a67cSTheodore Ts'o "mount options ignored."); 1843c325a67cSTheodore Ts'o clear_opt(sb, USRQUOTA); 1844c325a67cSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1845c325a67cSTheodore Ts'o } else if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1846482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1847fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1848ac27a0ecSDave Kleikamp 1849482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1850fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1851ac27a0ecSDave Kleikamp 185256c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1853b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1854b31e1552SEric Sandeen "format mixing"); 1855ac27a0ecSDave Kleikamp return 0; 1856ac27a0ecSDave Kleikamp } 1857ac27a0ecSDave Kleikamp 1858ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1859b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1860b31e1552SEric Sandeen "not specified"); 1861ac27a0ecSDave Kleikamp return 0; 1862ac27a0ecSDave Kleikamp } 1863ac27a0ecSDave Kleikamp } 1864ac27a0ecSDave Kleikamp #endif 1865261cb20cSJan Kara if (test_opt(sb, DIOREAD_NOLOCK)) { 1866261cb20cSJan Kara int blocksize = 1867261cb20cSJan Kara BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 1868261cb20cSJan Kara 186909cbfeafSKirill A. Shutemov if (blocksize < PAGE_SIZE) { 1870261cb20cSJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 1871261cb20cSJan Kara "dioread_nolock if block size != PAGE_SIZE"); 1872261cb20cSJan Kara return 0; 1873261cb20cSJan Kara } 1874261cb20cSJan Kara } 1875d4f76107SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 1876d4f76107SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 1877d4f76107SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with journal_async_commit " 1878d4f76107SJan Kara "in data=ordered mode"); 1879d4f76107SJan Kara return 0; 1880d4f76107SJan Kara } 1881ac27a0ecSDave Kleikamp return 1; 1882ac27a0ecSDave Kleikamp } 1883ac27a0ecSDave Kleikamp 18842adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 18852adf6da8STheodore Ts'o struct super_block *sb) 18862adf6da8STheodore Ts'o { 18872adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 18882adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 18892adf6da8STheodore Ts'o 18902adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 18912adf6da8STheodore Ts'o char *fmtname = ""; 18922adf6da8STheodore Ts'o 18932adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 18942adf6da8STheodore Ts'o case QFMT_VFS_OLD: 18952adf6da8STheodore Ts'o fmtname = "vfsold"; 18962adf6da8STheodore Ts'o break; 18972adf6da8STheodore Ts'o case QFMT_VFS_V0: 18982adf6da8STheodore Ts'o fmtname = "vfsv0"; 18992adf6da8STheodore Ts'o break; 19002adf6da8STheodore Ts'o case QFMT_VFS_V1: 19012adf6da8STheodore Ts'o fmtname = "vfsv1"; 19022adf6da8STheodore Ts'o break; 19032adf6da8STheodore Ts'o } 19042adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 19052adf6da8STheodore Ts'o } 19062adf6da8STheodore Ts'o 19072adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 1908a068acf2SKees Cook seq_show_option(seq, "usrjquota", sbi->s_qf_names[USRQUOTA]); 19092adf6da8STheodore Ts'o 19102adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 1911a068acf2SKees Cook seq_show_option(seq, "grpjquota", sbi->s_qf_names[GRPQUOTA]); 19122adf6da8STheodore Ts'o #endif 19132adf6da8STheodore Ts'o } 19142adf6da8STheodore Ts'o 19155a916be1STheodore Ts'o static const char *token2str(int token) 19165a916be1STheodore Ts'o { 191750df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 19185a916be1STheodore Ts'o 19195a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 19205a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 19215a916be1STheodore Ts'o break; 19225a916be1STheodore Ts'o return t->pattern; 19235a916be1STheodore Ts'o } 19245a916be1STheodore Ts'o 19252adf6da8STheodore Ts'o /* 19262adf6da8STheodore Ts'o * Show an option if 19272adf6da8STheodore Ts'o * - it's set to a non-default value OR 19282adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 19292adf6da8STheodore Ts'o */ 193066acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 193166acdcf4STheodore Ts'o int nodefs) 19322adf6da8STheodore Ts'o { 19332adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 19342adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 193566acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 19365a916be1STheodore Ts'o const struct mount_opts *m; 193766acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 19382adf6da8STheodore Ts'o 193966acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 194066acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 19412adf6da8STheodore Ts'o 19422adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 19435a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 19445a916be1STheodore Ts'o 19455a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 19465a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 19475a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 19485a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 19495a916be1STheodore Ts'o continue; 195066acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 19515a916be1STheodore Ts'o continue; /* skip if same as the default */ 19525a916be1STheodore Ts'o if ((want_set && 19535a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 19545a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 19555a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 19565a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 19575a916be1STheodore Ts'o } 19585a916be1STheodore Ts'o 195908cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 19605a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 196108cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 196208cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 196308cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 19645a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 196508cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 196608cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 196766acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 19685a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 19695a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 19702adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 19715a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 19722adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 19735a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 197466acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 19755a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 197666acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 19775a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 197866acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 19795a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 19802adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 19815a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 198266acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 19835a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 198466acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 19852adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 19865a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 19872adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 19885a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 19892adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 19905a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 19915a916be1STheodore Ts'o } 199266acdcf4STheodore Ts'o if (nodefs || 199366acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 19945a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 19952adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 19962adf6da8STheodore Ts'o 199766acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 199866acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 19995a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 2000df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 2001df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 20027915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 20037915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 20042adf6da8STheodore Ts'o 20052adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 20062adf6da8STheodore Ts'o return 0; 20072adf6da8STheodore Ts'o } 20082adf6da8STheodore Ts'o 200966acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 201066acdcf4STheodore Ts'o { 201166acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 201266acdcf4STheodore Ts'o } 201366acdcf4STheodore Ts'o 2014ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 201566acdcf4STheodore Ts'o { 201666acdcf4STheodore Ts'o struct super_block *sb = seq->private; 201766acdcf4STheodore Ts'o int rc; 201866acdcf4STheodore Ts'o 201966acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 202066acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 202166acdcf4STheodore Ts'o seq_puts(seq, "\n"); 202266acdcf4STheodore Ts'o return rc; 202366acdcf4STheodore Ts'o } 202466acdcf4STheodore Ts'o 2025617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 2026ac27a0ecSDave Kleikamp int read_only) 2027ac27a0ecSDave Kleikamp { 2028617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2029ac27a0ecSDave Kleikamp int res = 0; 2030ac27a0ecSDave Kleikamp 2031617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 2032b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 2033b31e1552SEric Sandeen "forcing read-only mode"); 2034ac27a0ecSDave Kleikamp res = MS_RDONLY; 2035ac27a0ecSDave Kleikamp } 2036ac27a0ecSDave Kleikamp if (read_only) 2037281b5995STheodore Ts'o goto done; 2038617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 2039b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 2040b31e1552SEric Sandeen "running e2fsck is recommended"); 2041c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 2042b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2043b31e1552SEric Sandeen "warning: mounting fs with errors, " 2044b31e1552SEric Sandeen "running e2fsck is recommended"); 2045ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 2046ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 2047ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 2048b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2049b31e1552SEric Sandeen "warning: maximal mount count reached, " 2050b31e1552SEric Sandeen "running e2fsck is recommended"); 2051ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 2052ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 2053ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 2054b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2055b31e1552SEric Sandeen "warning: checktime reached, " 2056b31e1552SEric Sandeen "running e2fsck is recommended"); 20570390131bSFrank Mayhar if (!sbi->s_journal) 2058216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 2059ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 2060617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 2061e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 2062ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 2063617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 20640390131bSFrank Mayhar if (sbi->s_journal) 2065e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 2066ac27a0ecSDave Kleikamp 2067e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 2068281b5995STheodore Ts'o done: 2069ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 2070a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 2071a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 2072ac27a0ecSDave Kleikamp sb->s_blocksize, 2073ac27a0ecSDave Kleikamp sbi->s_groups_count, 2074617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 2075617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 2076a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 2077ac27a0ecSDave Kleikamp 20787abc52c2SDan Magenheimer cleancache_init_fs(sb); 2079ac27a0ecSDave Kleikamp return res; 2080ac27a0ecSDave Kleikamp } 2081ac27a0ecSDave Kleikamp 2082117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 2083117fff10STheodore Ts'o { 2084117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 2085117fff10STheodore Ts'o struct flex_groups *new_groups; 2086117fff10STheodore Ts'o int size; 2087117fff10STheodore Ts'o 2088117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 2089117fff10STheodore Ts'o return 0; 2090117fff10STheodore Ts'o 2091117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 2092117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 2093117fff10STheodore Ts'o return 0; 2094117fff10STheodore Ts'o 2095117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 2096117fff10STheodore Ts'o new_groups = ext4_kvzalloc(size, GFP_KERNEL); 2097117fff10STheodore Ts'o if (!new_groups) { 2098117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 2099117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 2100117fff10STheodore Ts'o return -ENOMEM; 2101117fff10STheodore Ts'o } 2102117fff10STheodore Ts'o 2103117fff10STheodore Ts'o if (sbi->s_flex_groups) { 2104117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 2105117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 2106117fff10STheodore Ts'o sizeof(struct flex_groups))); 2107b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 2108117fff10STheodore Ts'o } 2109117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 2110117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 2111117fff10STheodore Ts'o return 0; 2112117fff10STheodore Ts'o } 2113117fff10STheodore Ts'o 2114772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 2115772cb7c8SJose R. Santos { 2116772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 2117772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 2118772cb7c8SJose R. Santos ext4_group_t flex_group; 2119117fff10STheodore Ts'o int i, err; 2120772cb7c8SJose R. Santos 2121503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 2122d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 2123772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 2124772cb7c8SJose R. Santos return 1; 2125772cb7c8SJose R. Santos } 2126772cb7c8SJose R. Santos 2127117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 2128117fff10STheodore Ts'o if (err) 2129772cb7c8SJose R. Santos goto failed; 2130772cb7c8SJose R. Santos 2131772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 213288b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 2133772cb7c8SJose R. Santos 2134772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 21357ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 21367ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 213790ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 213824aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 21397ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 21407ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 2141772cb7c8SJose R. Santos } 2142772cb7c8SJose R. Santos 2143772cb7c8SJose R. Santos return 1; 2144772cb7c8SJose R. Santos failed: 2145772cb7c8SJose R. Santos return 0; 2146772cb7c8SJose R. Santos } 2147772cb7c8SJose R. Santos 2148e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 2149717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2150717d50e4SAndreas Dilger { 2151b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 2152717d50e4SAndreas Dilger __u16 crc = 0; 2153717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2154e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 2155717d50e4SAndreas Dilger 21569aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 2157feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 2158feb0ab32SDarrick J. Wong __u32 csum32; 2159b47820edSDaeho Jeong __u16 dummy_csum = 0; 2160feb0ab32SDarrick J. Wong 2161feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 2162feb0ab32SDarrick J. Wong sizeof(le_group)); 2163b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 2164b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 2165b47820edSDaeho Jeong sizeof(dummy_csum)); 2166b47820edSDaeho Jeong offset += sizeof(dummy_csum); 2167b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 2168b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 2169b47820edSDaeho Jeong sbi->s_desc_size - offset); 2170feb0ab32SDarrick J. Wong 2171feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2172feb0ab32SDarrick J. Wong goto out; 2173feb0ab32SDarrick J. Wong } 2174feb0ab32SDarrick J. Wong 2175feb0ab32SDarrick J. Wong /* old crc16 code */ 2176e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 2177813d32f9SDarrick J. Wong return 0; 2178813d32f9SDarrick J. Wong 2179717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2180717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2181717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2182717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2183717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2184e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 2185717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2186717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2187717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2188717d50e4SAndreas Dilger offset); 2189717d50e4SAndreas Dilger 2190feb0ab32SDarrick J. Wong out: 2191717d50e4SAndreas Dilger return cpu_to_le16(crc); 2192717d50e4SAndreas Dilger } 2193717d50e4SAndreas Dilger 2194feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2195717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2196717d50e4SAndreas Dilger { 2197feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2198e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 2199717d50e4SAndreas Dilger return 0; 2200717d50e4SAndreas Dilger 2201717d50e4SAndreas Dilger return 1; 2202717d50e4SAndreas Dilger } 2203717d50e4SAndreas Dilger 2204feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2205feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2206feb0ab32SDarrick J. Wong { 2207feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2208feb0ab32SDarrick J. Wong return; 2209e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 2210feb0ab32SDarrick J. Wong } 2211feb0ab32SDarrick J. Wong 2212ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2213bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2214bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2215ac27a0ecSDave Kleikamp { 2216617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2217617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2218617ba13bSMingming Cao ext4_fsblk_t last_block; 2219bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2220bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2221bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2222ce421581SJose R. Santos int flexbg_flag = 0; 2223bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2224ac27a0ecSDave Kleikamp 2225e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 2226ce421581SJose R. Santos flexbg_flag = 1; 2227ce421581SJose R. Santos 2228617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2229ac27a0ecSDave Kleikamp 2230197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2231197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2232197cd65aSAkinobu Mita 2233ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2234bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2235ac27a0ecSDave Kleikamp else 2236ac27a0ecSDave Kleikamp last_block = first_block + 2237617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2238ac27a0ecSDave Kleikamp 2239bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2240bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2241bfff6873SLukas Czerner grp = i; 2242bfff6873SLukas Czerner 22438fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 22442b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2245b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2246a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2247b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2248ac27a0ecSDave Kleikamp return 0; 2249ac27a0ecSDave Kleikamp } 22508fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 22512b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2252b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2253a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2254b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2255ac27a0ecSDave Kleikamp return 0; 2256ac27a0ecSDave Kleikamp } 22578fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2258bd81d8eeSLaurent Vivier if (inode_table < first_block || 22592b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2260b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2261a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2262b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2263ac27a0ecSDave Kleikamp return 0; 2264ac27a0ecSDave Kleikamp } 2265955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2266feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2267b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2268b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2269e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 2270fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 22717ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2272955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2273717d50e4SAndreas Dilger return 0; 2274717d50e4SAndreas Dilger } 22757ee1ec4cSLi Zefan } 2276955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2277ce421581SJose R. Santos if (!flexbg_flag) 2278617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2279ac27a0ecSDave Kleikamp } 2280bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2281bfff6873SLukas Czerner *first_not_zeroed = grp; 2282ac27a0ecSDave Kleikamp return 1; 2283ac27a0ecSDave Kleikamp } 2284ac27a0ecSDave Kleikamp 2285617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2286ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2287ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2288ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2289ac27a0ecSDave Kleikamp * 2290ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2291ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2292ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2293ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2294ac27a0ecSDave Kleikamp * 2295ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2296ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2297ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2298617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2299ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2300ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2301ac27a0ecSDave Kleikamp */ 2302617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2303617ba13bSMingming Cao struct ext4_super_block *es) 2304ac27a0ecSDave Kleikamp { 2305ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2306ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2307ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2308ac27a0ecSDave Kleikamp int i; 2309ac27a0ecSDave Kleikamp #endif 2310ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2311ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2312ac27a0ecSDave Kleikamp return; 2313ac27a0ecSDave Kleikamp } 2314ac27a0ecSDave Kleikamp 2315a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2316b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2317b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2318a8f48a95SEric Sandeen return; 2319a8f48a95SEric Sandeen } 2320a8f48a95SEric Sandeen 2321d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2322d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2323d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2324d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2325d39195c3SAmir Goldstein return; 2326d39195c3SAmir Goldstein } 2327d39195c3SAmir Goldstein 2328617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2329c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 2330c25f9bc6SEric Sandeen if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { 233184474976SDmitry Monakhov ext4_msg(sb, KERN_INFO, "Errors on filesystem, " 2332ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2333ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2334c25f9bc6SEric Sandeen } 2335ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2336ac27a0ecSDave Kleikamp return; 2337ac27a0ecSDave Kleikamp } 2338ac27a0ecSDave Kleikamp 2339ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2340b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2341ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2342ac27a0ecSDave Kleikamp } 2343ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2344ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2345ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2346ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2347a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2348617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2349617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2350ac27a0ecSDave Kleikamp if (ret < 0) 2351b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2352b31e1552SEric Sandeen "Cannot turn on journaled " 2353b31e1552SEric Sandeen "quota: error %d", ret); 2354ac27a0ecSDave Kleikamp } 2355ac27a0ecSDave Kleikamp } 2356ac27a0ecSDave Kleikamp #endif 2357ac27a0ecSDave Kleikamp 2358ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2359ac27a0ecSDave Kleikamp struct inode *inode; 2360ac27a0ecSDave Kleikamp 236197bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 236297bd42b9SJosef Bacik if (IS_ERR(inode)) { 2363ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2364ac27a0ecSDave Kleikamp break; 2365ac27a0ecSDave Kleikamp } 2366ac27a0ecSDave Kleikamp 2367617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2368871a2931SChristoph Hellwig dquot_initialize(inode); 2369ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2370566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2371b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2372b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 237346e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2374e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2375ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 23765955102cSAl Viro inode_lock(inode); 237755f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 2378617ba13bSMingming Cao ext4_truncate(inode); 23795955102cSAl Viro inode_unlock(inode); 2380ac27a0ecSDave Kleikamp nr_truncates++; 2381ac27a0ecSDave Kleikamp } else { 2382566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2383b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2384b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 238546e665e9SHarvey Harrison __func__, inode->i_ino); 2386ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2387ac27a0ecSDave Kleikamp inode->i_ino); 2388ac27a0ecSDave Kleikamp nr_orphans++; 2389ac27a0ecSDave Kleikamp } 2390ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2391ac27a0ecSDave Kleikamp } 2392ac27a0ecSDave Kleikamp 2393ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2394ac27a0ecSDave Kleikamp 2395ac27a0ecSDave Kleikamp if (nr_orphans) 2396b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2397b31e1552SEric Sandeen PLURAL(nr_orphans)); 2398ac27a0ecSDave Kleikamp if (nr_truncates) 2399b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2400b31e1552SEric Sandeen PLURAL(nr_truncates)); 2401ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2402ac27a0ecSDave Kleikamp /* Turn quotas off */ 2403a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2404ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2405287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2406ac27a0ecSDave Kleikamp } 2407ac27a0ecSDave Kleikamp #endif 2408ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2409ac27a0ecSDave Kleikamp } 24100b8e58a1SAndreas Dilger 2411cd2291a4SEric Sandeen /* 2412cd2291a4SEric Sandeen * Maximal extent format file size. 2413cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2414cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2415cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2416cd2291a4SEric Sandeen * so that won't be a limiting factor. 2417cd2291a4SEric Sandeen * 2418f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2419f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2420f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2421f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2422f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2423f17722f9SLukas Czerner * 2424cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2425cd2291a4SEric Sandeen */ 2426f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2427cd2291a4SEric Sandeen { 2428cd2291a4SEric Sandeen loff_t res; 2429cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2430cd2291a4SEric Sandeen 2431cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2432f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2433cd2291a4SEric Sandeen /* 243490c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2435cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2436cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2437cd2291a4SEric Sandeen */ 2438cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2439cd2291a4SEric Sandeen 2440cd2291a4SEric Sandeen /* total blocks in file system block size */ 2441cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2442cd2291a4SEric Sandeen upper_limit <<= blkbits; 2443cd2291a4SEric Sandeen } 2444cd2291a4SEric Sandeen 2445f17722f9SLukas Czerner /* 2446f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2447f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2448f17722f9SLukas Czerner * size 2449f17722f9SLukas Czerner */ 2450f17722f9SLukas Czerner res = (1LL << 32) - 1; 2451cd2291a4SEric Sandeen res <<= blkbits; 2452cd2291a4SEric Sandeen 2453cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2454cd2291a4SEric Sandeen if (res > upper_limit) 2455cd2291a4SEric Sandeen res = upper_limit; 2456cd2291a4SEric Sandeen 2457cd2291a4SEric Sandeen return res; 2458cd2291a4SEric Sandeen } 2459ac27a0ecSDave Kleikamp 2460ac27a0ecSDave Kleikamp /* 2461cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 24620fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 24630fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2464ac27a0ecSDave Kleikamp */ 2465f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2466ac27a0ecSDave Kleikamp { 2467617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 24680fc1b451SAneesh Kumar K.V int meta_blocks; 24690fc1b451SAneesh Kumar K.V loff_t upper_limit; 24700b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 24710b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 24720b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 24730b8e58a1SAndreas Dilger * 24740b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 24750b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 24760fc1b451SAneesh Kumar K.V */ 24770fc1b451SAneesh Kumar K.V 2478f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 24790fc1b451SAneesh Kumar K.V /* 248090c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 24810b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 24820b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 24830fc1b451SAneesh Kumar K.V */ 24840fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 24850fc1b451SAneesh Kumar K.V 24860fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 24870fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 24880fc1b451SAneesh Kumar K.V 24890fc1b451SAneesh Kumar K.V } else { 24908180a562SAneesh Kumar K.V /* 24918180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 24928180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 24938180a562SAneesh Kumar K.V * represent total number of blocks in 24948180a562SAneesh Kumar K.V * file system block size 24958180a562SAneesh Kumar K.V */ 24960fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 24970fc1b451SAneesh Kumar K.V 24980fc1b451SAneesh Kumar K.V } 24990fc1b451SAneesh Kumar K.V 25000fc1b451SAneesh Kumar K.V /* indirect blocks */ 25010fc1b451SAneesh Kumar K.V meta_blocks = 1; 25020fc1b451SAneesh Kumar K.V /* double indirect blocks */ 25030fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 25040fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 25050fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 25060fc1b451SAneesh Kumar K.V 25070fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 25080fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2509ac27a0ecSDave Kleikamp 2510ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2511ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2512ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2513ac27a0ecSDave Kleikamp res <<= bits; 2514ac27a0ecSDave Kleikamp if (res > upper_limit) 2515ac27a0ecSDave Kleikamp res = upper_limit; 25160fc1b451SAneesh Kumar K.V 25170fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 25180fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 25190fc1b451SAneesh Kumar K.V 2520ac27a0ecSDave Kleikamp return res; 2521ac27a0ecSDave Kleikamp } 2522ac27a0ecSDave Kleikamp 2523617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 252470bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2525ac27a0ecSDave Kleikamp { 2526617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2527fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2528ac27a0ecSDave Kleikamp int has_super = 0; 2529ac27a0ecSDave Kleikamp 2530ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2531ac27a0ecSDave Kleikamp 2532e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 253370bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2534ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2535617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2536ac27a0ecSDave Kleikamp has_super = 1; 25370b8e58a1SAndreas Dilger 2538bd63f6b0SDarrick J. Wong /* 2539bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 2540bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 2541bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 2542bd63f6b0SDarrick J. Wong * compensate. 2543bd63f6b0SDarrick J. Wong */ 2544bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 2545bd63f6b0SDarrick J. Wong le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) 2546bd63f6b0SDarrick J. Wong has_super++; 2547bd63f6b0SDarrick J. Wong 2548617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2549ac27a0ecSDave Kleikamp } 2550ac27a0ecSDave Kleikamp 2551c9de560dSAlex Tomas /** 2552c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2553c9de560dSAlex Tomas * @sbi: In memory super block info 2554c9de560dSAlex Tomas * 2555c9de560dSAlex Tomas * If we have specified it via mount option, then 2556c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2557c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2558c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2559c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2560c9de560dSAlex Tomas * 2561c9de560dSAlex Tomas */ 2562c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2563c9de560dSAlex Tomas { 2564c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2565c9de560dSAlex Tomas unsigned long stripe_width = 2566c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 25673eb08658SDan Ehrenberg int ret; 2568c9de560dSAlex Tomas 2569c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 25703eb08658SDan Ehrenberg ret = sbi->s_stripe; 25713eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 25723eb08658SDan Ehrenberg ret = stripe_width; 25733eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 25743eb08658SDan Ehrenberg ret = stride; 25753eb08658SDan Ehrenberg else 25763eb08658SDan Ehrenberg ret = 0; 2577c9de560dSAlex Tomas 25783eb08658SDan Ehrenberg /* 25793eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 25803eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 25813eb08658SDan Ehrenberg */ 25823eb08658SDan Ehrenberg if (ret <= 1) 25833eb08658SDan Ehrenberg ret = 0; 2584c9de560dSAlex Tomas 25853eb08658SDan Ehrenberg return ret; 2586c9de560dSAlex Tomas } 2587ac27a0ecSDave Kleikamp 2588a13fb1a4SEric Sandeen /* 2589a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2590a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2591a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2592a13fb1a4SEric Sandeen * 0 if it cannot be. 2593a13fb1a4SEric Sandeen */ 2594a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2595a13fb1a4SEric Sandeen { 2596e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 2597a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2598a13fb1a4SEric Sandeen "Couldn't mount because of " 2599a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2600a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2601a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2602a13fb1a4SEric Sandeen return 0; 2603a13fb1a4SEric Sandeen } 2604a13fb1a4SEric Sandeen 2605a13fb1a4SEric Sandeen if (readonly) 2606a13fb1a4SEric Sandeen return 1; 2607a13fb1a4SEric Sandeen 2608e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 26092cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 26102cb5cc8bSDarrick J. Wong sb->s_flags |= MS_RDONLY; 26112cb5cc8bSDarrick J. Wong return 1; 26122cb5cc8bSDarrick J. Wong } 26132cb5cc8bSDarrick J. Wong 2614a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2615e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 2616a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2617a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2618a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2619a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2620a13fb1a4SEric Sandeen return 0; 2621a13fb1a4SEric Sandeen } 2622a13fb1a4SEric Sandeen /* 2623a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2624a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2625a13fb1a4SEric Sandeen */ 2626e2b911c5SDarrick J. Wong if (ext4_has_feature_huge_file(sb)) { 2627a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2628a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2629a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2630a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2631a13fb1a4SEric Sandeen return 0; 2632a13fb1a4SEric Sandeen } 2633a13fb1a4SEric Sandeen } 2634e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 2635bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2636bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2637bab08ab9STheodore Ts'o "extents feature\n"); 2638bab08ab9STheodore Ts'o return 0; 2639bab08ab9STheodore Ts'o } 26407c319d32SAditya Kali 26417c319d32SAditya Kali #ifndef CONFIG_QUOTA 2642e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) && !readonly) { 26437c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 26447c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 26457c319d32SAditya Kali "without CONFIG_QUOTA"); 26467c319d32SAditya Kali return 0; 26477c319d32SAditya Kali } 2648689c958cSLi Xi if (ext4_has_feature_project(sb) && !readonly) { 2649689c958cSLi Xi ext4_msg(sb, KERN_ERR, 2650689c958cSLi Xi "Filesystem with project quota feature cannot be mounted RDWR " 2651689c958cSLi Xi "without CONFIG_QUOTA"); 2652689c958cSLi Xi return 0; 2653689c958cSLi Xi } 26547c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2655a13fb1a4SEric Sandeen return 1; 2656a13fb1a4SEric Sandeen } 2657a13fb1a4SEric Sandeen 265866e61a9eSTheodore Ts'o /* 265966e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 266066e61a9eSTheodore Ts'o * on the file system 266166e61a9eSTheodore Ts'o */ 266266e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 266366e61a9eSTheodore Ts'o { 266466e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 266566e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 266666e61a9eSTheodore Ts'o struct ext4_super_block *es; 266766e61a9eSTheodore Ts'o 266866e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 266966e61a9eSTheodore Ts'o es = sbi->s_es; 267066e61a9eSTheodore Ts'o 267166e61a9eSTheodore Ts'o if (es->s_error_count) 2672ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 2673ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 267466e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 267566e61a9eSTheodore Ts'o if (es->s_first_error_time) { 2676ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", 267766e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 267866e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 267966e61a9eSTheodore Ts'o es->s_first_error_func, 268066e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 268166e61a9eSTheodore Ts'o if (es->s_first_error_ino) 268266e61a9eSTheodore Ts'o printk(": inode %u", 268366e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 268466e61a9eSTheodore Ts'o if (es->s_first_error_block) 268566e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 268666e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 268766e61a9eSTheodore Ts'o printk("\n"); 268866e61a9eSTheodore Ts'o } 268966e61a9eSTheodore Ts'o if (es->s_last_error_time) { 2690ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", 269166e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 269266e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 269366e61a9eSTheodore Ts'o es->s_last_error_func, 269466e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 269566e61a9eSTheodore Ts'o if (es->s_last_error_ino) 269666e61a9eSTheodore Ts'o printk(": inode %u", 269766e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 269866e61a9eSTheodore Ts'o if (es->s_last_error_block) 269966e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 270066e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 270166e61a9eSTheodore Ts'o printk("\n"); 270266e61a9eSTheodore Ts'o } 270366e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 270466e61a9eSTheodore Ts'o } 270566e61a9eSTheodore Ts'o 2706bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2707bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2708bfff6873SLukas Czerner { 2709bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2710bfff6873SLukas Czerner ext4_group_t group, ngroups; 2711bfff6873SLukas Czerner struct super_block *sb; 2712bfff6873SLukas Czerner unsigned long timeout = 0; 2713bfff6873SLukas Czerner int ret = 0; 2714bfff6873SLukas Czerner 2715bfff6873SLukas Czerner sb = elr->lr_super; 2716bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2717bfff6873SLukas Czerner 27188e8ad8a5SJan Kara sb_start_write(sb); 2719bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2720bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2721bfff6873SLukas Czerner if (!gdp) { 2722bfff6873SLukas Czerner ret = 1; 2723bfff6873SLukas Czerner break; 2724bfff6873SLukas Czerner } 2725bfff6873SLukas Czerner 2726bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2727bfff6873SLukas Czerner break; 2728bfff6873SLukas Czerner } 2729bfff6873SLukas Czerner 27307f511862STheodore Ts'o if (group >= ngroups) 2731bfff6873SLukas Czerner ret = 1; 2732bfff6873SLukas Czerner 2733bfff6873SLukas Czerner if (!ret) { 2734bfff6873SLukas Czerner timeout = jiffies; 2735bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2736bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2737bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 273851ce6511SLukas Czerner timeout = (jiffies - timeout) * 273951ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2740bfff6873SLukas Czerner elr->lr_timeout = timeout; 2741bfff6873SLukas Czerner } 2742bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2743bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2744bfff6873SLukas Czerner } 27458e8ad8a5SJan Kara sb_end_write(sb); 2746bfff6873SLukas Czerner 2747bfff6873SLukas Czerner return ret; 2748bfff6873SLukas Czerner } 2749bfff6873SLukas Czerner 2750bfff6873SLukas Czerner /* 2751bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 27524ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2753bfff6873SLukas Czerner */ 2754bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2755bfff6873SLukas Czerner { 2756bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2757bfff6873SLukas Czerner 2758bfff6873SLukas Czerner if (!elr) 2759bfff6873SLukas Czerner return; 2760bfff6873SLukas Czerner 2761bfff6873SLukas Czerner sbi = elr->lr_sbi; 2762bfff6873SLukas Czerner 2763bfff6873SLukas Czerner list_del(&elr->lr_request); 2764bfff6873SLukas Czerner sbi->s_li_request = NULL; 2765bfff6873SLukas Czerner kfree(elr); 2766bfff6873SLukas Czerner } 2767bfff6873SLukas Czerner 2768bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2769bfff6873SLukas Czerner { 27701bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 27711bb933fbSLukas Czerner if (!ext4_li_info) { 27721bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2773bfff6873SLukas Czerner return; 27741bb933fbSLukas Czerner } 2775bfff6873SLukas Czerner 2776bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 27771bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2778bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 27791bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2780bfff6873SLukas Czerner } 2781bfff6873SLukas Czerner 27828f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 27838f1f7453SEric Sandeen 2784bfff6873SLukas Czerner /* 2785bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2786bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2787bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2788bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2789bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2790bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2791bfff6873SLukas Czerner * next waking time and put itself into sleep. 2792bfff6873SLukas Czerner */ 2793bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2794bfff6873SLukas Czerner { 2795bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2796bfff6873SLukas Czerner struct list_head *pos, *n; 2797bfff6873SLukas Czerner struct ext4_li_request *elr; 27984ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2799bfff6873SLukas Czerner 2800bfff6873SLukas Czerner BUG_ON(NULL == eli); 2801bfff6873SLukas Czerner 2802bfff6873SLukas Czerner cont_thread: 2803bfff6873SLukas Czerner while (true) { 2804bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2805bfff6873SLukas Czerner 2806bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2807bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2808bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2809bfff6873SLukas Czerner goto exit_thread; 2810bfff6873SLukas Czerner } 2811bfff6873SLukas Czerner 2812bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2813bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2814bfff6873SLukas Czerner lr_request); 2815bfff6873SLukas Czerner 2816b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2817b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2818b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2819bfff6873SLukas Czerner ext4_remove_li_request(elr); 2820bfff6873SLukas Czerner continue; 2821bfff6873SLukas Czerner } 2822b2c78cd0STheodore Ts'o } 2823bfff6873SLukas Czerner 2824bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2825bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2826bfff6873SLukas Czerner } 2827bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2828bfff6873SLukas Czerner 2829a0acae0eSTejun Heo try_to_freeze(); 2830bfff6873SLukas Czerner 28314ed5c033SLukas Czerner cur = jiffies; 28324ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2833f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2834bfff6873SLukas Czerner cond_resched(); 2835bfff6873SLukas Czerner continue; 2836bfff6873SLukas Czerner } 2837bfff6873SLukas Czerner 28384ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 28394ed5c033SLukas Czerner 28408f1f7453SEric Sandeen if (kthread_should_stop()) { 28418f1f7453SEric Sandeen ext4_clear_request_list(); 28428f1f7453SEric Sandeen goto exit_thread; 28438f1f7453SEric Sandeen } 2844bfff6873SLukas Czerner } 2845bfff6873SLukas Czerner 2846bfff6873SLukas Czerner exit_thread: 2847bfff6873SLukas Czerner /* 2848bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2849bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2850bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2851bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2852bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2853bfff6873SLukas Czerner * new one. 2854bfff6873SLukas Czerner */ 2855bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2856bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2857bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 2858bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2859bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2860bfff6873SLukas Czerner goto cont_thread; 2861bfff6873SLukas Czerner } 2862bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2863bfff6873SLukas Czerner kfree(ext4_li_info); 2864bfff6873SLukas Czerner ext4_li_info = NULL; 2865bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2866bfff6873SLukas Czerner 2867bfff6873SLukas Czerner return 0; 2868bfff6873SLukas Czerner } 2869bfff6873SLukas Czerner 2870bfff6873SLukas Czerner static void ext4_clear_request_list(void) 2871bfff6873SLukas Czerner { 2872bfff6873SLukas Czerner struct list_head *pos, *n; 2873bfff6873SLukas Czerner struct ext4_li_request *elr; 2874bfff6873SLukas Czerner 2875bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2876bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 2877bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2878bfff6873SLukas Czerner lr_request); 2879bfff6873SLukas Czerner ext4_remove_li_request(elr); 2880bfff6873SLukas Czerner } 2881bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2882bfff6873SLukas Czerner } 2883bfff6873SLukas Czerner 2884bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 2885bfff6873SLukas Czerner { 28868f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 28878f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 28888f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 28898f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 2890bfff6873SLukas Czerner ext4_clear_request_list(); 2891bfff6873SLukas Czerner kfree(ext4_li_info); 2892bfff6873SLukas Czerner ext4_li_info = NULL; 289392b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 2894bfff6873SLukas Czerner "initialization thread\n", 2895bfff6873SLukas Czerner err); 2896bfff6873SLukas Czerner return err; 2897bfff6873SLukas Czerner } 2898bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 2899bfff6873SLukas Czerner return 0; 2900bfff6873SLukas Czerner } 2901bfff6873SLukas Czerner 2902bfff6873SLukas Czerner /* 2903bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 2904bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 2905bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 2906bfff6873SLukas Czerner * groups and return total number of groups. 2907bfff6873SLukas Czerner */ 2908bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 2909bfff6873SLukas Czerner { 2910bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 2911bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2912bfff6873SLukas Czerner 2913bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 2914bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2915bfff6873SLukas Czerner if (!gdp) 2916bfff6873SLukas Czerner continue; 2917bfff6873SLukas Czerner 2918bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2919bfff6873SLukas Czerner break; 2920bfff6873SLukas Czerner } 2921bfff6873SLukas Czerner 2922bfff6873SLukas Czerner return group; 2923bfff6873SLukas Czerner } 2924bfff6873SLukas Czerner 2925bfff6873SLukas Czerner static int ext4_li_info_new(void) 2926bfff6873SLukas Czerner { 2927bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 2928bfff6873SLukas Czerner 2929bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 2930bfff6873SLukas Czerner if (!eli) 2931bfff6873SLukas Czerner return -ENOMEM; 2932bfff6873SLukas Czerner 2933bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 2934bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 2935bfff6873SLukas Czerner 2936bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 2937bfff6873SLukas Czerner 2938bfff6873SLukas Czerner ext4_li_info = eli; 2939bfff6873SLukas Czerner 2940bfff6873SLukas Czerner return 0; 2941bfff6873SLukas Czerner } 2942bfff6873SLukas Czerner 2943bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 2944bfff6873SLukas Czerner ext4_group_t start) 2945bfff6873SLukas Czerner { 2946bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2947bfff6873SLukas Czerner struct ext4_li_request *elr; 2948bfff6873SLukas Czerner 2949bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 2950bfff6873SLukas Czerner if (!elr) 2951bfff6873SLukas Czerner return NULL; 2952bfff6873SLukas Czerner 2953bfff6873SLukas Czerner elr->lr_super = sb; 2954bfff6873SLukas Czerner elr->lr_sbi = sbi; 2955bfff6873SLukas Czerner elr->lr_next_group = start; 2956bfff6873SLukas Czerner 2957bfff6873SLukas Czerner /* 2958bfff6873SLukas Czerner * Randomize first schedule time of the request to 2959bfff6873SLukas Czerner * spread the inode table initialization requests 2960bfff6873SLukas Czerner * better. 2961bfff6873SLukas Czerner */ 2962dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 2963dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 2964bfff6873SLukas Czerner return elr; 2965bfff6873SLukas Czerner } 2966bfff6873SLukas Czerner 29677f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 2968bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 2969bfff6873SLukas Czerner { 2970bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 29717f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 2972bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 29736c5a6cb9SAndrew Morton int ret = 0; 2974bfff6873SLukas Czerner 29757f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 297651ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 297751ce6511SLukas Czerner /* 297851ce6511SLukas Czerner * Reset timeout so it can be computed again, because 297951ce6511SLukas Czerner * s_li_wait_mult might have changed. 298051ce6511SLukas Czerner */ 298151ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 29827f511862STheodore Ts'o goto out; 298351ce6511SLukas Czerner } 2984bfff6873SLukas Czerner 2985bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 2986bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 298755ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 29887f511862STheodore Ts'o goto out; 2989bfff6873SLukas Czerner 2990bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 29917f511862STheodore Ts'o if (!elr) { 29927f511862STheodore Ts'o ret = -ENOMEM; 29937f511862STheodore Ts'o goto out; 29947f511862STheodore Ts'o } 2995bfff6873SLukas Czerner 2996bfff6873SLukas Czerner if (NULL == ext4_li_info) { 2997bfff6873SLukas Czerner ret = ext4_li_info_new(); 2998bfff6873SLukas Czerner if (ret) 2999bfff6873SLukas Czerner goto out; 3000bfff6873SLukas Czerner } 3001bfff6873SLukas Czerner 3002bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3003bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3004bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3005bfff6873SLukas Czerner 3006bfff6873SLukas Czerner sbi->s_li_request = elr; 300746e4690bSTao Ma /* 300846e4690bSTao Ma * set elr to NULL here since it has been inserted to 300946e4690bSTao Ma * the request_list and the removal and free of it is 301046e4690bSTao Ma * handled by ext4_clear_request_list from now on. 301146e4690bSTao Ma */ 301246e4690bSTao Ma elr = NULL; 3013bfff6873SLukas Czerner 3014bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3015bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3016bfff6873SLukas Czerner if (ret) 3017bfff6873SLukas Czerner goto out; 3018bfff6873SLukas Czerner } 3019bfff6873SLukas Czerner out: 3020bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3021beed5ecbSNicolas Kaiser if (ret) 3022bfff6873SLukas Czerner kfree(elr); 3023bfff6873SLukas Czerner return ret; 3024bfff6873SLukas Czerner } 3025bfff6873SLukas Czerner 3026bfff6873SLukas Czerner /* 3027bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3028bfff6873SLukas Czerner * module unload. 3029bfff6873SLukas Czerner */ 3030bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3031bfff6873SLukas Czerner { 3032bfff6873SLukas Czerner /* 3033bfff6873SLukas Czerner * If thread exited earlier 3034bfff6873SLukas Czerner * there's nothing to be done. 3035bfff6873SLukas Czerner */ 30368f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3037bfff6873SLukas Czerner return; 3038bfff6873SLukas Czerner 30398f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3040bfff6873SLukas Czerner } 3041bfff6873SLukas Czerner 304225ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 304325ed6e8aSDarrick J. Wong { 304425ed6e8aSDarrick J. Wong int ret = 1; 304525ed6e8aSDarrick J. Wong int compat, incompat; 304625ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 304725ed6e8aSDarrick J. Wong 30489aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 3049db9ee220SDarrick J. Wong /* journal checksum v3 */ 305025ed6e8aSDarrick J. Wong compat = 0; 3051db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 305225ed6e8aSDarrick J. Wong } else { 305325ed6e8aSDarrick J. Wong /* journal checksum v1 */ 305425ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 305525ed6e8aSDarrick J. Wong incompat = 0; 305625ed6e8aSDarrick J. Wong } 305725ed6e8aSDarrick J. Wong 3058feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 3059feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3060feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 3061feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 306225ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 306325ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 306425ed6e8aSDarrick J. Wong compat, 0, 306525ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 306625ed6e8aSDarrick J. Wong incompat); 306725ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 306825ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 306925ed6e8aSDarrick J. Wong compat, 0, 307025ed6e8aSDarrick J. Wong incompat); 307125ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 307225ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 307325ed6e8aSDarrick J. Wong } else { 3074feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3075feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 307625ed6e8aSDarrick J. Wong } 307725ed6e8aSDarrick J. Wong 307825ed6e8aSDarrick J. Wong return ret; 307925ed6e8aSDarrick J. Wong } 308025ed6e8aSDarrick J. Wong 3081952fc18eSTheodore Ts'o /* 3082952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3083952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3084952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3085952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3086952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3087952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3088952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3089952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3090952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3091952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3092952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3093952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3094952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3095952fc18eSTheodore Ts'o */ 3096952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3097952fc18eSTheodore Ts'o char *buf) 3098952fc18eSTheodore Ts'o { 3099952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3100952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3101952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3102952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3103952fc18eSTheodore Ts'o int s, j, count = 0; 3104952fc18eSTheodore Ts'o 3105e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 31060548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 31070548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 31080548bbb8STheodore Ts'o 3109952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3110952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3111952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3112952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3113952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3114952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3115952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3116952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3117952fc18eSTheodore Ts'o count++; 3118952fc18eSTheodore Ts'o } 3119952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3120952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3121952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3122952fc18eSTheodore Ts'o count++; 3123952fc18eSTheodore Ts'o } 3124952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3125952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3126952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3127952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3128952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3129952fc18eSTheodore Ts'o count++; 3130952fc18eSTheodore Ts'o } 3131952fc18eSTheodore Ts'o if (i != grp) 3132952fc18eSTheodore Ts'o continue; 3133952fc18eSTheodore Ts'o s = 0; 3134952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3135952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3136952fc18eSTheodore Ts'o count++; 3137952fc18eSTheodore Ts'o } 3138952fc18eSTheodore Ts'o for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { 3139952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3140952fc18eSTheodore Ts'o count++; 3141952fc18eSTheodore Ts'o } 3142952fc18eSTheodore Ts'o } 3143952fc18eSTheodore Ts'o if (!count) 3144952fc18eSTheodore Ts'o return 0; 3145952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3146952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3147952fc18eSTheodore Ts'o } 3148952fc18eSTheodore Ts'o 3149952fc18eSTheodore Ts'o /* 3150952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3151952fc18eSTheodore Ts'o */ 3152952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3153952fc18eSTheodore Ts'o { 3154952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3155952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 3156952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3157952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 31584fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 3159952fc18eSTheodore Ts'o 3160952fc18eSTheodore Ts'o if (!buf) 3161952fc18eSTheodore Ts'o return -ENOMEM; 3162952fc18eSTheodore Ts'o 3163952fc18eSTheodore Ts'o /* 3164952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3165952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3166952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3167952fc18eSTheodore Ts'o */ 3168952fc18eSTheodore Ts'o 3169952fc18eSTheodore Ts'o /* 3170952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3171952fc18eSTheodore Ts'o */ 3172952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3173952fc18eSTheodore Ts'o 3174952fc18eSTheodore Ts'o /* 3175952fc18eSTheodore Ts'o * Add the overhead found in each block group 3176952fc18eSTheodore Ts'o */ 3177952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3178952fc18eSTheodore Ts'o int blks; 3179952fc18eSTheodore Ts'o 3180952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3181952fc18eSTheodore Ts'o overhead += blks; 3182952fc18eSTheodore Ts'o if (blks) 3183952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3184952fc18eSTheodore Ts'o cond_resched(); 3185952fc18eSTheodore Ts'o } 3186b003b524SEric Sandeen /* Add the internal journal blocks as well */ 3187b003b524SEric Sandeen if (sbi->s_journal && !sbi->journal_bdev) 3188810da240SLukas Czerner overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); 31890875a2b4SEric Sandeen 3190952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3191952fc18eSTheodore Ts'o smp_wmb(); 3192952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3193952fc18eSTheodore Ts'o return 0; 3194952fc18eSTheodore Ts'o } 3195952fc18eSTheodore Ts'o 3196b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 319727dd4385SLukas Czerner { 319827dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 3199b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 320027dd4385SLukas Czerner 320127dd4385SLukas Czerner /* 320230fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 320330fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 320430fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 320530fac0f7SJan Kara * to keep ext2/3 backward compatibility. 320630fac0f7SJan Kara */ 3207e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 3208b5799018STheodore Ts'o return; 320930fac0f7SJan Kara /* 321027dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 321127dd4385SLukas Czerner * This should cover the situations where we can not afford to run 321227dd4385SLukas Czerner * out of space like for example punch hole, or converting 3213556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 321427dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 321527dd4385SLukas Czerner * very rare. 321627dd4385SLukas Czerner */ 3217b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 3218b5799018STheodore Ts'o sbi->s_cluster_bits); 321927dd4385SLukas Czerner 322027dd4385SLukas Czerner do_div(resv_clusters, 50); 322127dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 322227dd4385SLukas Czerner 3223b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 322427dd4385SLukas Czerner } 322527dd4385SLukas Czerner 3226617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3227ac27a0ecSDave Kleikamp { 3228d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3229ac27a0ecSDave Kleikamp struct buffer_head *bh; 3230617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3231617ba13bSMingming Cao struct ext4_sb_info *sbi; 3232617ba13bSMingming Cao ext4_fsblk_t block; 3233617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 323470bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3235ac27a0ecSDave Kleikamp unsigned long offset = 0; 3236ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3237ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3238ac27a0ecSDave Kleikamp struct inode *root; 32390390131bSFrank Mayhar const char *descr; 3240dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3241281b5995STheodore Ts'o int blocksize, clustersize; 32424ec11028STheodore Ts'o unsigned int db_count; 32434ec11028STheodore Ts'o unsigned int i; 3244281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3245bd81d8eeSLaurent Vivier __u64 blocks_count; 324607aa2ea1SLukas Czerner int err = 0; 3247b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3248bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3249ac27a0ecSDave Kleikamp 3250ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3251ac27a0ecSDave Kleikamp if (!sbi) 3252dcc7dae3SCyrill Gorcunov goto out_free_orig; 3253705895b6SPekka Enberg 3254705895b6SPekka Enberg sbi->s_blockgroup_lock = 3255705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3256705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3257705895b6SPekka Enberg kfree(sbi); 3258dcc7dae3SCyrill Gorcunov goto out_free_orig; 3259705895b6SPekka Enberg } 3260ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 32612c0544b2STheodore Ts'o sbi->s_sb = sb; 3262240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3263d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3264f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3265f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3266f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3267ac27a0ecSDave Kleikamp 32689f6200bbSTheodore Ts'o /* Cleanup superblock name */ 3269ec3904dcSRasmus Villemoes strreplace(sb->s_id, '/', '!'); 32709f6200bbSTheodore Ts'o 327107aa2ea1SLukas Czerner /* -EINVAL is default */ 3272dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3273617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3274ac27a0ecSDave Kleikamp if (!blocksize) { 3275b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3276ac27a0ecSDave Kleikamp goto out_fail; 3277ac27a0ecSDave Kleikamp } 3278ac27a0ecSDave Kleikamp 3279ac27a0ecSDave Kleikamp /* 3280617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3281ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3282ac27a0ecSDave Kleikamp */ 3283617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 328470bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 328570bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3286ac27a0ecSDave Kleikamp } else { 328770bbb3e0SAndrew Morton logical_sb_block = sb_block; 3288ac27a0ecSDave Kleikamp } 3289ac27a0ecSDave Kleikamp 3290a8ac900bSGioh Kim if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { 3291b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3292ac27a0ecSDave Kleikamp goto out_fail; 3293ac27a0ecSDave Kleikamp } 3294ac27a0ecSDave Kleikamp /* 3295ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3296617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3297ac27a0ecSDave Kleikamp */ 32982716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3299ac27a0ecSDave Kleikamp sbi->s_es = es; 3300ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3301617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3302617ba13bSMingming Cao goto cantfind_ext4; 3303afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3304ac27a0ecSDave Kleikamp 3305feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3306e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 3307e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 3308363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 3309feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3310feb0ab32SDarrick J. Wong 3311d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3312d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3313d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3314d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3315d25425f8SDarrick J. Wong silent = 1; 3316d25425f8SDarrick J. Wong goto cantfind_ext4; 3317d25425f8SDarrick J. Wong } 3318d25425f8SDarrick J. Wong 33190441984aSDarrick J. Wong /* Load the checksum driver */ 3320e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb)) { 33210441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 33220441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 33230441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 33240441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 33250441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 33260441984aSDarrick J. Wong goto failed_mount; 33270441984aSDarrick J. Wong } 33280441984aSDarrick J. Wong } 33290441984aSDarrick J. Wong 3330a9c47317SDarrick J. Wong /* Check superblock checksum */ 3331a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3332a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3333a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3334a9c47317SDarrick J. Wong silent = 1; 33356a797d27SDarrick J. Wong ret = -EFSBADCRC; 3336a9c47317SDarrick J. Wong goto cantfind_ext4; 3337a9c47317SDarrick J. Wong } 3338a9c47317SDarrick J. Wong 3339a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 3340e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 33418c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 33428c81bd8fSDarrick J. Wong else if (ext4_has_metadata_csum(sb)) 3343a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3344a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3345a9c47317SDarrick J. Wong 3346ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3347ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3348fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3349617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3350fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 335187f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3352fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3353617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3354fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3355ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3356fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 335703010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3358fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 33592e7842b8SHugh Dickins #endif 336098c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 336198c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 336298c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 336398c1a759SDarrick J. Wong 3364617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3365fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3366617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3367fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3368617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3369fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3370ac27a0ecSDave Kleikamp 3371617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3372fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3373bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3374fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3375bb4f397aSAneesh Kumar K.V else 3376fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 337745f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 3378fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 33798b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3380fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3381ac27a0ecSDave Kleikamp 338208cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 338308cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 338430773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 338530773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 338630773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3387ac27a0ecSDave Kleikamp 33888b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3389fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3390ac27a0ecSDave Kleikamp 33911e2462f9SMingming Cao /* 3392dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3393dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3394dd919b98SAneesh Kumar K.V */ 3395bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 33968b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3397fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3398dd919b98SAneesh Kumar K.V 339951ce6511SLukas Czerner /* 340051ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 340151ce6511SLukas Czerner * no mount option specified. 340251ce6511SLukas Czerner */ 340351ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 340451ce6511SLukas Czerner 34058b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 3406661aa520SEric Sandeen &journal_devnum, &journal_ioprio, 0)) { 34078b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 34088b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 34098b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 34108b67f04aSTheodore Ts'o } 34115a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3412b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3413661aa520SEric Sandeen &journal_ioprio, 0)) 3414ac27a0ecSDave Kleikamp goto failed_mount; 3415ac27a0ecSDave Kleikamp 341656889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 341756889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 341856889787STheodore Ts'o "with data=journal disables delayed " 341956889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 342056889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 342156889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 342256889787STheodore Ts'o "both data=journal and delalloc"); 342356889787STheodore Ts'o goto failed_mount; 342456889787STheodore Ts'o } 342556889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 342656889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 34276ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 342856889787STheodore Ts'o goto failed_mount; 342956889787STheodore Ts'o } 3430923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 3431923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 3432923ae0ffSRoss Zwisler "both data=journal and dax"); 3433923ae0ffSRoss Zwisler goto failed_mount; 3434923ae0ffSRoss Zwisler } 343556889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 343656889787STheodore Ts'o clear_opt(sb, DELALLOC); 3437001e4a87STejun Heo } else { 3438001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 343956889787STheodore Ts'o } 344056889787STheodore Ts'o 3441ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3442482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3443ac27a0ecSDave Kleikamp 3444617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3445e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 3446e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 3447e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 3448b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3449b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3450b31e1552SEric Sandeen "running e2fsck is recommended"); 3451469108ffSTheodore Tso 3452ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 3453ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 3454e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 3455ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 3456ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 3457ed3654ebSTheodore Ts'o goto failed_mount; 3458ed3654ebSTheodore Ts'o } 3459ed3654ebSTheodore Ts'o } 3460ed3654ebSTheodore Ts'o 34612035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 34622035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 34632035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 34642035e776STheodore Ts'o "using the ext4 subsystem"); 34652035e776STheodore Ts'o else { 34662035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 34672035e776STheodore Ts'o "to feature incompatibilities"); 34682035e776STheodore Ts'o goto failed_mount; 34692035e776STheodore Ts'o } 34702035e776STheodore Ts'o } 34712035e776STheodore Ts'o 34722035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 34732035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 34742035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 34752035e776STheodore Ts'o "using the ext4 subsystem"); 34762035e776STheodore Ts'o else { 34772035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 34782035e776STheodore Ts'o "to feature incompatibilities"); 34792035e776STheodore Ts'o goto failed_mount; 34802035e776STheodore Ts'o } 34812035e776STheodore Ts'o } 34822035e776STheodore Ts'o 3483469108ffSTheodore Tso /* 3484ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3485ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3486ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3487ac27a0ecSDave Kleikamp */ 3488a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3489ac27a0ecSDave Kleikamp goto failed_mount; 3490a13fb1a4SEric Sandeen 3491261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3492617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3493617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3494b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3495b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3496ac27a0ecSDave Kleikamp goto failed_mount; 3497ac27a0ecSDave Kleikamp } 3498ac27a0ecSDave Kleikamp 34995b9554dcSTheodore Ts'o if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { 35005b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 35015b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 35025b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 35035b9554dcSTheodore Ts'o goto failed_mount; 35045b9554dcSTheodore Ts'o } 35055b9554dcSTheodore Ts'o 3506923ae0ffSRoss Zwisler if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { 350787eefeb4SToshi Kani err = bdev_dax_supported(sb, blocksize); 350887eefeb4SToshi Kani if (err) 3509923ae0ffSRoss Zwisler goto failed_mount; 3510923ae0ffSRoss Zwisler } 3511923ae0ffSRoss Zwisler 3512e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 35136ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 35146ddb2447STheodore Ts'o es->s_encryption_level); 35156ddb2447STheodore Ts'o goto failed_mount; 35166ddb2447STheodore Ts'o } 35176ddb2447STheodore Ts'o 3518ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3519ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3520ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3521b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3522ce40733cSAneesh Kumar K.V blocksize); 3523ac27a0ecSDave Kleikamp goto failed_mount; 3524ac27a0ecSDave Kleikamp } 3525ac27a0ecSDave Kleikamp 3526ac27a0ecSDave Kleikamp brelse(bh); 352770bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 352870bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3529a8ac900bSGioh Kim bh = sb_bread_unmovable(sb, logical_sb_block); 3530ac27a0ecSDave Kleikamp if (!bh) { 3531b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3532b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3533ac27a0ecSDave Kleikamp goto failed_mount; 3534ac27a0ecSDave Kleikamp } 35352716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3536ac27a0ecSDave Kleikamp sbi->s_es = es; 3537617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3538b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3539b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3540ac27a0ecSDave Kleikamp goto failed_mount; 3541ac27a0ecSDave Kleikamp } 3542ac27a0ecSDave Kleikamp } 3543ac27a0ecSDave Kleikamp 3544e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 3545f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3546f287a1a5STheodore Ts'o has_huge_files); 3547f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3548ac27a0ecSDave Kleikamp 3549617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3550617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3551617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3552ac27a0ecSDave Kleikamp } else { 3553ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3554ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3555617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 35561330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3557ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3558b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3559b31e1552SEric Sandeen "unsupported inode size: %d", 3560ac27a0ecSDave Kleikamp sbi->s_inode_size); 3561ac27a0ecSDave Kleikamp goto failed_mount; 3562ac27a0ecSDave Kleikamp } 3563ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3564ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3565ac27a0ecSDave Kleikamp } 35660b8e58a1SAndreas Dilger 35670d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 3568e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 35698fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 35700d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3571d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3572b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3573b31e1552SEric Sandeen "unsupported descriptor size %lu", 35740d1ee42fSAlexandre Ratchov sbi->s_desc_size); 35750d1ee42fSAlexandre Ratchov goto failed_mount; 35760d1ee42fSAlexandre Ratchov } 35770d1ee42fSAlexandre Ratchov } else 35780d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 35790b8e58a1SAndreas Dilger 3580ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3581ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3582b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3583617ba13bSMingming Cao goto cantfind_ext4; 35840b8e58a1SAndreas Dilger 3585617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3586ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3587617ba13bSMingming Cao goto cantfind_ext4; 3588ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3589ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 35900d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3591ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3592ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3593e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3594e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 35950b8e58a1SAndreas Dilger 3596ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3597ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3598ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3599e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 3600f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3601f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3602f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3603f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3604f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 360523301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 360623301410STheodore Ts'o es->s_flags |= 360723301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3608f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3609f99b2589STheodore Ts'o #else 361023301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 361123301410STheodore Ts'o es->s_flags |= 361223301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3613f99b2589STheodore Ts'o #endif 3614f99b2589STheodore Ts'o } 361523301410STheodore Ts'o } 3616ac27a0ecSDave Kleikamp 3617281b5995STheodore Ts'o /* Handle clustersize */ 3618281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3619e2b911c5SDarrick J. Wong has_bigalloc = ext4_has_feature_bigalloc(sb); 3620281b5995STheodore Ts'o if (has_bigalloc) { 3621281b5995STheodore Ts'o if (clustersize < blocksize) { 3622281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3623281b5995STheodore Ts'o "cluster size (%d) smaller than " 3624281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3625281b5995STheodore Ts'o goto failed_mount; 3626281b5995STheodore Ts'o } 3627281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3628281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3629281b5995STheodore Ts'o sbi->s_clusters_per_group = 3630281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3631281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3632281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3633281b5995STheodore Ts'o "#clusters per group too big: %lu", 3634281b5995STheodore Ts'o sbi->s_clusters_per_group); 3635281b5995STheodore Ts'o goto failed_mount; 3636281b5995STheodore Ts'o } 3637281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3638281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3639281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3640281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3641281b5995STheodore Ts'o sbi->s_blocks_per_group, 3642281b5995STheodore Ts'o sbi->s_clusters_per_group); 3643281b5995STheodore Ts'o goto failed_mount; 3644281b5995STheodore Ts'o } 3645281b5995STheodore Ts'o } else { 3646281b5995STheodore Ts'o if (clustersize != blocksize) { 3647281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3648281b5995STheodore Ts'o "block size (%d)", clustersize, 3649281b5995STheodore Ts'o blocksize); 3650281b5995STheodore Ts'o clustersize = blocksize; 3651281b5995STheodore Ts'o } 3652ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3653b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3654b31e1552SEric Sandeen "#blocks per group too big: %lu", 3655ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3656ac27a0ecSDave Kleikamp goto failed_mount; 3657ac27a0ecSDave Kleikamp } 3658281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3659281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3660281b5995STheodore Ts'o } 3661281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3662281b5995STheodore Ts'o 3663ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3664b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3665b31e1552SEric Sandeen "#inodes per group too big: %lu", 3666ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3667ac27a0ecSDave Kleikamp goto failed_mount; 3668ac27a0ecSDave Kleikamp } 3669ac27a0ecSDave Kleikamp 3670960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 3671960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 3672960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 3673960fd856STheodore Ts'o 3674bf43d84bSEric Sandeen /* 3675bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3676bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3677bf43d84bSEric Sandeen */ 36785a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 367930ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 36805a9ae68aSDarrick J. Wong if (err) { 3681b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3682bf43d84bSEric Sandeen " too large to mount safely on this system"); 3683ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 368490c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 3685ac27a0ecSDave Kleikamp goto failed_mount; 3686ac27a0ecSDave Kleikamp } 3687ac27a0ecSDave Kleikamp 3688617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3689617ba13bSMingming Cao goto cantfind_ext4; 3690e7c95593SEric Sandeen 36910f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 36920f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 36930f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3694b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3695b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 36960f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 36970f2ddca6SFrom: Thiemo Nagel goto failed_mount; 36980f2ddca6SFrom: Thiemo Nagel } 36990f2ddca6SFrom: Thiemo Nagel 37004ec11028STheodore Ts'o /* 37014ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 37024ec11028STheodore Ts'o * of the filesystem. 37034ec11028STheodore Ts'o */ 37044ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3705b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3706b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3707e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 37084ec11028STheodore Ts'o ext4_blocks_count(es)); 3709e7c95593SEric Sandeen goto failed_mount; 3710e7c95593SEric Sandeen } 3711bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3712bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3713bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3714bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 37154ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3716b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 37174ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3718b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 37194ec11028STheodore Ts'o ext4_blocks_count(es), 37204ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 37214ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 37224ec11028STheodore Ts'o goto failed_mount; 37234ec11028STheodore Ts'o } 3724bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3725fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3726fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3727617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3728617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3729f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3730f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3731ac27a0ecSDave Kleikamp GFP_KERNEL); 3732ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3733b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 37342cde417dSTheodore Ts'o ret = -ENOMEM; 3735ac27a0ecSDave Kleikamp goto failed_mount; 3736ac27a0ecSDave Kleikamp } 3737ac27a0ecSDave Kleikamp 3738705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3739ac27a0ecSDave Kleikamp 3740ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 374170bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3742a8ac900bSGioh Kim sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); 3743ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3744b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3745b31e1552SEric Sandeen "can't read group descriptor %d", i); 3746ac27a0ecSDave Kleikamp db_count = i; 3747ac27a0ecSDave Kleikamp goto failed_mount2; 3748ac27a0ecSDave Kleikamp } 3749ac27a0ecSDave Kleikamp } 3750bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3751b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 37526a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 3753f9ae9cf5STheodore Ts'o goto failed_mount2; 3754ac27a0ecSDave Kleikamp } 3755772cb7c8SJose R. Santos 3756f9ae9cf5STheodore Ts'o sbi->s_gdb_count = db_count; 3757ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3758ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3759ac27a0ecSDave Kleikamp 376004ecddb7SJan Mrazek setup_timer(&sbi->s_err_report, print_daily_error_info, 376104ecddb7SJan Mrazek (unsigned long) sb); 376204496411STao Ma 3763a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 3764eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 3765ce7e010aSTheodore Ts'o goto failed_mount3; 3766ce7e010aSTheodore Ts'o 3767c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 376867a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 3769c9de560dSAlex Tomas 3770f9ae9cf5STheodore Ts'o /* 3771f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 3772f9ae9cf5STheodore Ts'o */ 3773f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 3774617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3775617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3776*a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 3777ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3778617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3779e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 37801fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 3781262b4662SJan Kara else 3782262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 3783689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 3784ac27a0ecSDave Kleikamp #endif 3785f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3786f2fa2ffcSAneesh Kumar K.V 3787ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 37883b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 3789ac27a0ecSDave Kleikamp 3790ac27a0ecSDave Kleikamp sb->s_root = NULL; 3791ac27a0ecSDave Kleikamp 3792ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3793e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 3794ac27a0ecSDave Kleikamp 3795e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb) && !(sb->s_flags & MS_RDONLY)) 3796c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 379750460fe8SDarrick J. Wong goto failed_mount3a; 3798c5e06d10SJohann Lombardi 3799ac27a0ecSDave Kleikamp /* 3800ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3801ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3802ac27a0ecSDave Kleikamp */ 3803e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 3804617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 380550460fe8SDarrick J. Wong goto failed_mount3a; 38060390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 3807e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 3808b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3809b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3810744692dcSJiaying Zhang goto failed_mount_wq; 3811ac27a0ecSDave Kleikamp } else { 38121e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 38131e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 38141e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 38151e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 38161e381f60SDmitry Monakhov goto failed_mount_wq; 38171e381f60SDmitry Monakhov } 38181e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 38191e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 38201e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 38211e381f60SDmitry Monakhov goto failed_mount_wq; 38221e381f60SDmitry Monakhov } 38231e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 38241e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 38251e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 38261e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 38271e381f60SDmitry Monakhov goto failed_mount_wq; 38281e381f60SDmitry Monakhov } 38291e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 38301e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 38311e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 38321e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 38331e381f60SDmitry Monakhov goto failed_mount_wq; 38341e381f60SDmitry Monakhov } 38351e381f60SDmitry Monakhov sbi->s_def_mount_opt &= EXT4_MOUNT_JOURNAL_CHECKSUM; 38361e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 3837fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 38380390131bSFrank Mayhar sbi->s_journal = NULL; 38390390131bSFrank Mayhar needs_recovery = 0; 38400390131bSFrank Mayhar goto no_journal; 3841ac27a0ecSDave Kleikamp } 3842ac27a0ecSDave Kleikamp 3843e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 3844eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3845eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3846b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3847744692dcSJiaying Zhang goto failed_mount_wq; 3848eb40a09cSJose R. Santos } 3849eb40a09cSJose R. Santos 385025ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 385125ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 385225ed6e8aSDarrick J. Wong "feature set"); 385325ed6e8aSDarrick J. Wong goto failed_mount_wq; 3854d4da6c9cSLinus Torvalds } 3855818d276cSGirish Shilamkar 3856ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 3857ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 3858ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3859ac27a0ecSDave Kleikamp case 0: 3860ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 386163f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 386263f57933SAndrew Morton * cope, else JOURNAL_DATA 386363f57933SAndrew Morton */ 3864dab291afSMingming Cao if (jbd2_journal_check_available_features 3865dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 3866fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3867ac27a0ecSDave Kleikamp else 3868fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3869ac27a0ecSDave Kleikamp break; 3870ac27a0ecSDave Kleikamp 3871617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 3872617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 3873dab291afSMingming Cao if (!jbd2_journal_check_available_features 3874dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 3875b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 3876b31e1552SEric Sandeen "requested data journaling mode"); 3877744692dcSJiaying Zhang goto failed_mount_wq; 3878ac27a0ecSDave Kleikamp } 3879ac27a0ecSDave Kleikamp default: 3880ac27a0ecSDave Kleikamp break; 3881ac27a0ecSDave Kleikamp } 3882b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3883ac27a0ecSDave Kleikamp 388418aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 388518aadd47SBobi Jam 3886ce7e010aSTheodore Ts'o no_journal: 388782939d79SJan Kara sbi->s_mb_cache = ext4_xattr_create_cache(); 38889c191f70ST Makphaibulchoke if (!sbi->s_mb_cache) { 38899c191f70ST Makphaibulchoke ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); 38909c191f70ST Makphaibulchoke goto failed_mount_wq; 38919c191f70ST Makphaibulchoke } 38929c191f70ST Makphaibulchoke 3893e2b911c5SDarrick J. Wong if ((DUMMY_ENCRYPTION_ENABLED(sbi) || ext4_has_feature_encrypt(sb)) && 389409cbfeafSKirill A. Shutemov (blocksize != PAGE_SIZE)) { 38951cb767cdSTheodore Ts'o ext4_msg(sb, KERN_ERR, 38961cb767cdSTheodore Ts'o "Unsupported blocksize for fs encryption"); 38971cb767cdSTheodore Ts'o goto failed_mount_wq; 38981cb767cdSTheodore Ts'o } 38991cb767cdSTheodore Ts'o 3900e2b911c5SDarrick J. Wong if (DUMMY_ENCRYPTION_ENABLED(sbi) && !(sb->s_flags & MS_RDONLY) && 3901e2b911c5SDarrick J. Wong !ext4_has_feature_encrypt(sb)) { 3902e2b911c5SDarrick J. Wong ext4_set_feature_encrypt(sb); 39036ddb2447STheodore Ts'o ext4_commit_super(sb, 1); 39046ddb2447STheodore Ts'o } 39056ddb2447STheodore Ts'o 3906fd89d5f2STejun Heo /* 3907952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 3908952fc18eSTheodore Ts'o * superblock if present. 3909952fc18eSTheodore Ts'o */ 3910952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 3911952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 3912952fc18eSTheodore Ts'o else { 391307aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 391407aa2ea1SLukas Czerner if (err) 3915952fc18eSTheodore Ts'o goto failed_mount_wq; 3916952fc18eSTheodore Ts'o } 3917952fc18eSTheodore Ts'o 3918952fc18eSTheodore Ts'o /* 3919fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 3920fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 3921fd89d5f2STejun Heo */ 39222e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 39232e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 39242e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 39252e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 392607aa2ea1SLukas Czerner ret = -ENOMEM; 39272e8fa54eSJan Kara goto failed_mount4; 39282e8fa54eSJan Kara } 39292e8fa54eSJan Kara 3930ac27a0ecSDave Kleikamp /* 3931dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 3932ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 3933ac27a0ecSDave Kleikamp */ 3934ac27a0ecSDave Kleikamp 39351d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 39361d1fe1eeSDavid Howells if (IS_ERR(root)) { 3937b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 39381d1fe1eeSDavid Howells ret = PTR_ERR(root); 393932a9bb57SManish Katiyar root = NULL; 3940ac27a0ecSDave Kleikamp goto failed_mount4; 3941ac27a0ecSDave Kleikamp } 3942ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 3943b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 394494bf608aSAl Viro iput(root); 3945ac27a0ecSDave Kleikamp goto failed_mount4; 3946ac27a0ecSDave Kleikamp } 394748fde701SAl Viro sb->s_root = d_make_root(root); 39481d1fe1eeSDavid Howells if (!sb->s_root) { 3949b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 39501d1fe1eeSDavid Howells ret = -ENOMEM; 39511d1fe1eeSDavid Howells goto failed_mount4; 39521d1fe1eeSDavid Howells } 3953ac27a0ecSDave Kleikamp 39547e84b621SEric Sandeen if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) 39557e84b621SEric Sandeen sb->s_flags |= MS_RDONLY; 3956ef7f3835SKalpak Shah 3957ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 3958ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 3959ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3960ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3961e2b911c5SDarrick J. Wong if (ext4_has_feature_extra_isize(sb)) { 3962ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3963ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 3964ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3965ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 3966ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3967ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 3968ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3969ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 3970ef7f3835SKalpak Shah } 3971ef7f3835SKalpak Shah } 3972ef7f3835SKalpak Shah /* Check if enough inode space is available */ 3973ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 3974ef7f3835SKalpak Shah sbi->s_inode_size) { 3975ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3976ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3977b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 3978b31e1552SEric Sandeen "available"); 3979ef7f3835SKalpak Shah } 3980ef7f3835SKalpak Shah 3981b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 398227dd4385SLukas Czerner 39836fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 39846fd058f7STheodore Ts'o if (err) { 3985b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 3986fbe845ddSCurt Wohlgemuth "zone (%d)", err); 3987f9ae9cf5STheodore Ts'o goto failed_mount4a; 3988f9ae9cf5STheodore Ts'o } 3989f9ae9cf5STheodore Ts'o 3990f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 3991f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 3992f9ae9cf5STheodore Ts'o if (err) { 3993f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 3994f9ae9cf5STheodore Ts'o err); 3995dcf2d804STao Ma goto failed_mount5; 3996c2774d84SAneesh Kumar K.V } 3997c2774d84SAneesh Kumar K.V 3998d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 3999d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 4000d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 4001908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 4002908c7f19STejun Heo GFP_KERNEL); 4003d5e03cbbSTheodore Ts'o if (!err) { 4004d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 4005d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 4006908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 4007908c7f19STejun Heo GFP_KERNEL); 4008d5e03cbbSTheodore Ts'o } 4009d5e03cbbSTheodore Ts'o if (!err) 4010d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 4011908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 4012d5e03cbbSTheodore Ts'o if (!err) 4013908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 4014908c7f19STejun Heo GFP_KERNEL); 4015c8585c6fSDaeho Jeong if (!err) 4016c8585c6fSDaeho Jeong err = percpu_init_rwsem(&sbi->s_journal_flag_rwsem); 4017c8585c6fSDaeho Jeong 4018d5e03cbbSTheodore Ts'o if (err) { 4019d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 4020d5e03cbbSTheodore Ts'o goto failed_mount6; 4021d5e03cbbSTheodore Ts'o } 4022d5e03cbbSTheodore Ts'o 4023e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 4024d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 4025d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4026d5e03cbbSTheodore Ts'o "unable to initialize " 4027d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 4028d5e03cbbSTheodore Ts'o goto failed_mount6; 4029d5e03cbbSTheodore Ts'o } 4030d5e03cbbSTheodore Ts'o 4031bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 4032bfff6873SLukas Czerner if (err) 4033dcf2d804STao Ma goto failed_mount6; 4034bfff6873SLukas Czerner 4035b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 4036dcf2d804STao Ma if (err) 4037dcf2d804STao Ma goto failed_mount7; 40383197ebdbSTheodore Ts'o 40399b2ff357SJan Kara #ifdef CONFIG_QUOTA 40409b2ff357SJan Kara /* Enable quota usage during mount. */ 4041e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) && !(sb->s_flags & MS_RDONLY)) { 40429b2ff357SJan Kara err = ext4_enable_quotas(sb); 40439b2ff357SJan Kara if (err) 40449b2ff357SJan Kara goto failed_mount8; 40459b2ff357SJan Kara } 40469b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 40479b2ff357SJan Kara 4048617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 4049617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 4050617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 40510390131bSFrank Mayhar if (needs_recovery) { 4052b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 4053617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 40540390131bSFrank Mayhar } 40550390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 40560390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 40570390131bSFrank Mayhar descr = " journalled data mode"; 40580390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 40590390131bSFrank Mayhar descr = " ordered data mode"; 40600390131bSFrank Mayhar else 40610390131bSFrank Mayhar descr = " writeback data mode"; 40620390131bSFrank Mayhar } else 40630390131bSFrank Mayhar descr = "out journal"; 40640390131bSFrank Mayhar 406579add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 406679add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 406779add3a3SLukas Czerner if (!blk_queue_discard(q)) 406879add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 406979add3a3SLukas Czerner "mounting with \"discard\" option, but " 407079add3a3SLukas Czerner "the device does not support discard"); 407179add3a3SLukas Czerner } 407279add3a3SLukas Czerner 4073e294a537STheodore Ts'o if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 4074d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 40758b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 40768b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 4077ac27a0ecSDave Kleikamp 407866e61a9eSTheodore Ts'o if (es->s_error_count) 407966e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 4080ac27a0ecSDave Kleikamp 4081efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 4082efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 4083efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 4084efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 4085efbed4dcSTheodore Ts'o 4086d4c402d9SCurt Wohlgemuth kfree(orig_data); 4087*a7550b30SJaegeuk Kim #ifdef CONFIG_EXT4_FS_ENCRYPTION 4088*a7550b30SJaegeuk Kim memcpy(sbi->key_prefix, EXT4_KEY_DESC_PREFIX, 4089*a7550b30SJaegeuk Kim EXT4_KEY_DESC_PREFIX_SIZE); 4090*a7550b30SJaegeuk Kim sbi->key_prefix_size = EXT4_KEY_DESC_PREFIX_SIZE; 4091*a7550b30SJaegeuk Kim #endif 4092ac27a0ecSDave Kleikamp return 0; 4093ac27a0ecSDave Kleikamp 4094617ba13bSMingming Cao cantfind_ext4: 4095ac27a0ecSDave Kleikamp if (!silent) 4096b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4097ac27a0ecSDave Kleikamp goto failed_mount; 4098ac27a0ecSDave Kleikamp 409972ba7450STheodore Ts'o #ifdef CONFIG_QUOTA 410072ba7450STheodore Ts'o failed_mount8: 4101ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 410272ba7450STheodore Ts'o #endif 4103dcf2d804STao Ma failed_mount7: 4104dcf2d804STao Ma ext4_unregister_li_request(sb); 4105dcf2d804STao Ma failed_mount6: 4106f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 4107d5e03cbbSTheodore Ts'o if (sbi->s_flex_groups) 4108b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 4109d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4110d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4111d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 4112d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 411300764937SAzat Khuzhin failed_mount5: 4114f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 4115f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 4116f9ae9cf5STheodore Ts'o failed_mount4a: 411794bf608aSAl Viro dput(sb->s_root); 411832a9bb57SManish Katiyar sb->s_root = NULL; 411994bf608aSAl Viro failed_mount4: 4120b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 41212e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 41222e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 41234c0425ffSMingming Cao failed_mount_wq: 412482939d79SJan Kara if (sbi->s_mb_cache) { 412582939d79SJan Kara ext4_xattr_destroy_cache(sbi->s_mb_cache); 412682939d79SJan Kara sbi->s_mb_cache = NULL; 412782939d79SJan Kara } 41280390131bSFrank Mayhar if (sbi->s_journal) { 4129dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 413047b4a50bSJan Kara sbi->s_journal = NULL; 41310390131bSFrank Mayhar } 413250460fe8SDarrick J. Wong failed_mount3a: 4133d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 4134eb68d0e2SZheng Liu failed_mount3: 41359105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 4136c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4137c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4138ac27a0ecSDave Kleikamp failed_mount2: 4139ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4140ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4141b93b41d4SAl Viro kvfree(sbi->s_group_desc); 4142ac27a0ecSDave Kleikamp failed_mount: 41430441984aSDarrick J. Wong if (sbi->s_chksum_driver) 41440441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4145ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4146a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4147ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4148ac27a0ecSDave Kleikamp #endif 4149617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4150ac27a0ecSDave Kleikamp brelse(bh); 4151ac27a0ecSDave Kleikamp out_fail: 4152ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4153f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 4154ac27a0ecSDave Kleikamp kfree(sbi); 4155dcc7dae3SCyrill Gorcunov out_free_orig: 4156d4c402d9SCurt Wohlgemuth kfree(orig_data); 415707aa2ea1SLukas Czerner return err ? err : ret; 4158ac27a0ecSDave Kleikamp } 4159ac27a0ecSDave Kleikamp 4160ac27a0ecSDave Kleikamp /* 4161ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4162ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4163ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4164ac27a0ecSDave Kleikamp */ 4165617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4166ac27a0ecSDave Kleikamp { 4167617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4168ac27a0ecSDave Kleikamp 4169ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 417030773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 417130773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4172ac27a0ecSDave Kleikamp 4173a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4174ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4175dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4176ac27a0ecSDave Kleikamp else 4177dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 41785bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 41795bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 41805bf5683aSHidehiro Kawai else 41815bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4182a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4183ac27a0ecSDave Kleikamp } 4184ac27a0ecSDave Kleikamp 4185617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 4186ac27a0ecSDave Kleikamp unsigned int journal_inum) 4187ac27a0ecSDave Kleikamp { 4188ac27a0ecSDave Kleikamp struct inode *journal_inode; 4189ac27a0ecSDave Kleikamp journal_t *journal; 4190ac27a0ecSDave Kleikamp 4191e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 41920390131bSFrank Mayhar 4193ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 4194ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 4195ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 4196ac27a0ecSDave Kleikamp 41971d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 41981d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4199b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4200ac27a0ecSDave Kleikamp return NULL; 4201ac27a0ecSDave Kleikamp } 4202ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4203ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4204ac27a0ecSDave Kleikamp iput(journal_inode); 4205b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4206ac27a0ecSDave Kleikamp return NULL; 4207ac27a0ecSDave Kleikamp } 4208ac27a0ecSDave Kleikamp 4209e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4210ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 42111d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4212b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4213ac27a0ecSDave Kleikamp iput(journal_inode); 4214ac27a0ecSDave Kleikamp return NULL; 4215ac27a0ecSDave Kleikamp } 4216ac27a0ecSDave Kleikamp 4217dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4218ac27a0ecSDave Kleikamp if (!journal) { 4219b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4220ac27a0ecSDave Kleikamp iput(journal_inode); 4221ac27a0ecSDave Kleikamp return NULL; 4222ac27a0ecSDave Kleikamp } 4223ac27a0ecSDave Kleikamp journal->j_private = sb; 4224617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4225ac27a0ecSDave Kleikamp return journal; 4226ac27a0ecSDave Kleikamp } 4227ac27a0ecSDave Kleikamp 4228617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4229ac27a0ecSDave Kleikamp dev_t j_dev) 4230ac27a0ecSDave Kleikamp { 4231ac27a0ecSDave Kleikamp struct buffer_head *bh; 4232ac27a0ecSDave Kleikamp journal_t *journal; 4233617ba13bSMingming Cao ext4_fsblk_t start; 4234617ba13bSMingming Cao ext4_fsblk_t len; 4235ac27a0ecSDave Kleikamp int hblock, blocksize; 4236617ba13bSMingming Cao ext4_fsblk_t sb_block; 4237ac27a0ecSDave Kleikamp unsigned long offset; 4238617ba13bSMingming Cao struct ext4_super_block *es; 4239ac27a0ecSDave Kleikamp struct block_device *bdev; 4240ac27a0ecSDave Kleikamp 4241e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 42420390131bSFrank Mayhar 4243b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4244ac27a0ecSDave Kleikamp if (bdev == NULL) 4245ac27a0ecSDave Kleikamp return NULL; 4246ac27a0ecSDave Kleikamp 4247ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4248e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4249ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4250b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4251b31e1552SEric Sandeen "blocksize too small for journal device"); 4252ac27a0ecSDave Kleikamp goto out_bdev; 4253ac27a0ecSDave Kleikamp } 4254ac27a0ecSDave Kleikamp 4255617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4256617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4257ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4258ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4259b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4260b31e1552SEric Sandeen "external journal"); 4261ac27a0ecSDave Kleikamp goto out_bdev; 4262ac27a0ecSDave Kleikamp } 4263ac27a0ecSDave Kleikamp 42642716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4265617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4266ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4267617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4268b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4269b31e1552SEric Sandeen "bad superblock"); 4270ac27a0ecSDave Kleikamp brelse(bh); 4271ac27a0ecSDave Kleikamp goto out_bdev; 4272ac27a0ecSDave Kleikamp } 4273ac27a0ecSDave Kleikamp 4274df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 4275df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 4276df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 4277df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 4278df4763beSDarrick J. Wong "corrupt superblock"); 4279df4763beSDarrick J. Wong brelse(bh); 4280df4763beSDarrick J. Wong goto out_bdev; 4281df4763beSDarrick J. Wong } 4282df4763beSDarrick J. Wong 4283617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4284b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4285ac27a0ecSDave Kleikamp brelse(bh); 4286ac27a0ecSDave Kleikamp goto out_bdev; 4287ac27a0ecSDave Kleikamp } 4288ac27a0ecSDave Kleikamp 4289bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4290ac27a0ecSDave Kleikamp start = sb_block + 1; 4291ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4292ac27a0ecSDave Kleikamp 4293dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4294ac27a0ecSDave Kleikamp start, len, blocksize); 4295ac27a0ecSDave Kleikamp if (!journal) { 4296b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4297ac27a0ecSDave Kleikamp goto out_bdev; 4298ac27a0ecSDave Kleikamp } 4299ac27a0ecSDave Kleikamp journal->j_private = sb; 43009f203507STheodore Ts'o ll_rw_block(READ | REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); 4301ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4302ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4303b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4304ac27a0ecSDave Kleikamp goto out_journal; 4305ac27a0ecSDave Kleikamp } 4306ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4307b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4308b31e1552SEric Sandeen "user (unsupported) - %d", 4309ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4310ac27a0ecSDave Kleikamp goto out_journal; 4311ac27a0ecSDave Kleikamp } 4312617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4313617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4314ac27a0ecSDave Kleikamp return journal; 43150b8e58a1SAndreas Dilger 4316ac27a0ecSDave Kleikamp out_journal: 4317dab291afSMingming Cao jbd2_journal_destroy(journal); 4318ac27a0ecSDave Kleikamp out_bdev: 4319617ba13bSMingming Cao ext4_blkdev_put(bdev); 4320ac27a0ecSDave Kleikamp return NULL; 4321ac27a0ecSDave Kleikamp } 4322ac27a0ecSDave Kleikamp 4323617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4324617ba13bSMingming Cao struct ext4_super_block *es, 4325ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4326ac27a0ecSDave Kleikamp { 4327ac27a0ecSDave Kleikamp journal_t *journal; 4328ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4329ac27a0ecSDave Kleikamp dev_t journal_dev; 4330ac27a0ecSDave Kleikamp int err = 0; 4331ac27a0ecSDave Kleikamp int really_read_only; 4332ac27a0ecSDave Kleikamp 4333e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 43340390131bSFrank Mayhar 4335ac27a0ecSDave Kleikamp if (journal_devnum && 4336ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4337b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4338b31e1552SEric Sandeen "numbers have changed"); 4339ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4340ac27a0ecSDave Kleikamp } else 4341ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4342ac27a0ecSDave Kleikamp 4343ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4344ac27a0ecSDave Kleikamp 4345ac27a0ecSDave Kleikamp /* 4346ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4347ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4348ac27a0ecSDave Kleikamp * can get read-write access to the device. 4349ac27a0ecSDave Kleikamp */ 4350e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 4351ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4352b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4353b31e1552SEric Sandeen "required on readonly filesystem"); 4354ac27a0ecSDave Kleikamp if (really_read_only) { 4355b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4356b31e1552SEric Sandeen "unavailable, cannot proceed"); 4357ac27a0ecSDave Kleikamp return -EROFS; 4358ac27a0ecSDave Kleikamp } 4359b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4360b31e1552SEric Sandeen "be enabled during recovery"); 4361ac27a0ecSDave Kleikamp } 4362ac27a0ecSDave Kleikamp } 4363ac27a0ecSDave Kleikamp 4364ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4365b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4366b31e1552SEric Sandeen "and inode journals!"); 4367ac27a0ecSDave Kleikamp return -EINVAL; 4368ac27a0ecSDave Kleikamp } 4369ac27a0ecSDave Kleikamp 4370ac27a0ecSDave Kleikamp if (journal_inum) { 4371617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4372ac27a0ecSDave Kleikamp return -EINVAL; 4373ac27a0ecSDave Kleikamp } else { 4374617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4375ac27a0ecSDave Kleikamp return -EINVAL; 4376ac27a0ecSDave Kleikamp } 4377ac27a0ecSDave Kleikamp 437890576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4379b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 43804776004fSTheodore Ts'o 4381e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 4382dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 43831c13d5c0STheodore Ts'o if (!err) { 43841c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 43851c13d5c0STheodore Ts'o if (save) 43861c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 43871c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4388dab291afSMingming Cao err = jbd2_journal_load(journal); 43891c13d5c0STheodore Ts'o if (save) 43901c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 43911c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 43921c13d5c0STheodore Ts'o kfree(save); 43931c13d5c0STheodore Ts'o } 4394ac27a0ecSDave Kleikamp 4395ac27a0ecSDave Kleikamp if (err) { 4396b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4397dab291afSMingming Cao jbd2_journal_destroy(journal); 4398ac27a0ecSDave Kleikamp return err; 4399ac27a0ecSDave Kleikamp } 4400ac27a0ecSDave Kleikamp 4401617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4402617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4403ac27a0ecSDave Kleikamp 4404c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4405ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4406ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4407ac27a0ecSDave Kleikamp 4408ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4409e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4410ac27a0ecSDave Kleikamp } 4411ac27a0ecSDave Kleikamp 4412ac27a0ecSDave Kleikamp return 0; 4413ac27a0ecSDave Kleikamp } 4414ac27a0ecSDave Kleikamp 4415e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4416ac27a0ecSDave Kleikamp { 4417e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4418617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4419c4be0c1dSTakashi Sato int error = 0; 4420ac27a0ecSDave Kleikamp 4421bdfe0cbdSTheodore Ts'o if (!sbh || block_device_ejected(sb)) 4422c4be0c1dSTakashi Sato return error; 442371290b36STheodore Ts'o /* 442471290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 442571290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 442671290b36STheodore Ts'o * write time when we are mounting the root file system 442771290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 442871290b36STheodore Ts'o * for people who are east of GMT and who make their clock 442971290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 443071290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 443171290b36STheodore Ts'o * to complain and force a full file system check. 443271290b36STheodore Ts'o */ 443371290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4434ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4435f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4436afc32f7eSTheodore Ts'o es->s_kbytes_written = 4437afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4438afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4439afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4440f613dfcbSTheodore Ts'o else 4441f613dfcbSTheodore Ts'o es->s_kbytes_written = 4442f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 4443d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) 444457042651STheodore Ts'o ext4_free_blocks_count_set(es, 444557042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 444657042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 4447d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) 44487f93cff9STheodore Ts'o es->s_free_inodes_count = 44497f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 44505d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4451ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 445206db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 44534743f839SPranay Kr. Srivastava lock_buffer(sbh); 44544743f839SPranay Kr. Srivastava if (buffer_write_io_error(sbh)) { 44554743f839SPranay Kr. Srivastava /* 44564743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 44574743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 44584743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 44594743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 44604743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 44614743f839SPranay Kr. Srivastava * write and hope for the best. 44624743f839SPranay Kr. Srivastava */ 44634743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 44644743f839SPranay Kr. Srivastava "superblock detected"); 44654743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 44664743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 44674743f839SPranay Kr. Srivastava } 4468ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 44694743f839SPranay Kr. Srivastava unlock_buffer(sbh); 4470914258bfSTheodore Ts'o if (sync) { 4471564bc402SDaeho Jeong error = __sync_dirty_buffer(sbh, 4472564bc402SDaeho Jeong test_opt(sb, BARRIER) ? WRITE_FUA : WRITE_SYNC); 4473c4be0c1dSTakashi Sato if (error) 4474c4be0c1dSTakashi Sato return error; 4475c4be0c1dSTakashi Sato 4476c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4477c4be0c1dSTakashi Sato if (error) { 4478b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4479b31e1552SEric Sandeen "superblock"); 4480914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4481914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4482914258bfSTheodore Ts'o } 4483914258bfSTheodore Ts'o } 4484c4be0c1dSTakashi Sato return error; 4485ac27a0ecSDave Kleikamp } 4486ac27a0ecSDave Kleikamp 4487ac27a0ecSDave Kleikamp /* 4488ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4489ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4490ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4491ac27a0ecSDave Kleikamp */ 4492617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4493617ba13bSMingming Cao struct ext4_super_block *es) 4494ac27a0ecSDave Kleikamp { 4495617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4496ac27a0ecSDave Kleikamp 4497e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 44980390131bSFrank Mayhar BUG_ON(journal != NULL); 44990390131bSFrank Mayhar return; 45000390131bSFrank Mayhar } 4501dab291afSMingming Cao jbd2_journal_lock_updates(journal); 45027ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 45037ffe1ea8SHidehiro Kawai goto out; 45047ffe1ea8SHidehiro Kawai 4505e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb) && 4506ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4507e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 4508e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4509ac27a0ecSDave Kleikamp } 45107ffe1ea8SHidehiro Kawai 45117ffe1ea8SHidehiro Kawai out: 4512dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4513ac27a0ecSDave Kleikamp } 4514ac27a0ecSDave Kleikamp 4515ac27a0ecSDave Kleikamp /* 4516ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4517ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4518ac27a0ecSDave Kleikamp * main filesystem now. 4519ac27a0ecSDave Kleikamp */ 4520617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4521617ba13bSMingming Cao struct ext4_super_block *es) 4522ac27a0ecSDave Kleikamp { 4523ac27a0ecSDave Kleikamp journal_t *journal; 4524ac27a0ecSDave Kleikamp int j_errno; 4525ac27a0ecSDave Kleikamp const char *errstr; 4526ac27a0ecSDave Kleikamp 4527e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 45280390131bSFrank Mayhar 4529617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4530ac27a0ecSDave Kleikamp 4531ac27a0ecSDave Kleikamp /* 4532ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4533617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4534ac27a0ecSDave Kleikamp */ 4535ac27a0ecSDave Kleikamp 4536dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4537ac27a0ecSDave Kleikamp if (j_errno) { 4538ac27a0ecSDave Kleikamp char nbuf[16]; 4539ac27a0ecSDave Kleikamp 4540617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 454112062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4542ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 454312062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4544ac27a0ecSDave Kleikamp 4545617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4546617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4547e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4548ac27a0ecSDave Kleikamp 4549dab291afSMingming Cao jbd2_journal_clear_err(journal); 4550d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4551ac27a0ecSDave Kleikamp } 4552ac27a0ecSDave Kleikamp } 4553ac27a0ecSDave Kleikamp 4554ac27a0ecSDave Kleikamp /* 4555ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4556ac27a0ecSDave Kleikamp * and wait on the commit. 4557ac27a0ecSDave Kleikamp */ 4558617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4559ac27a0ecSDave Kleikamp { 4560ac27a0ecSDave Kleikamp journal_t *journal; 4561ac27a0ecSDave Kleikamp 4562ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4563ac27a0ecSDave Kleikamp return 0; 4564ac27a0ecSDave Kleikamp 4565617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4566b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 4567ac27a0ecSDave Kleikamp } 4568ac27a0ecSDave Kleikamp 4569617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4570ac27a0ecSDave Kleikamp { 457114ce0cb4STheodore Ts'o int ret = 0; 45729eddacf9SJan Kara tid_t target; 457306a407f1SDmitry Monakhov bool needs_barrier = false; 45748d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4575ac27a0ecSDave Kleikamp 45769bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 45772e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 4578a1177825SJan Kara /* 4579a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4580a1177825SJan Kara * no dirty dquots 4581a1177825SJan Kara */ 4582a1177825SJan Kara dquot_writeback_dquots(sb, -1); 458306a407f1SDmitry Monakhov /* 458406a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 458506a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 458606a407f1SDmitry Monakhov * transaction_commit will do it for us. 458706a407f1SDmitry Monakhov */ 4588bda32530STheodore Ts'o if (sbi->s_journal) { 458906a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 459006a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 459106a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 459206a407f1SDmitry Monakhov needs_barrier = true; 459306a407f1SDmitry Monakhov 45948d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4595ac27a0ecSDave Kleikamp if (wait) 4596bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 4597bda32530STheodore Ts'o target); 45980390131bSFrank Mayhar } 4599bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 4600bda32530STheodore Ts'o needs_barrier = true; 460106a407f1SDmitry Monakhov if (needs_barrier) { 460206a407f1SDmitry Monakhov int err; 460306a407f1SDmitry Monakhov err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 460406a407f1SDmitry Monakhov if (!ret) 460506a407f1SDmitry Monakhov ret = err; 460606a407f1SDmitry Monakhov } 460706a407f1SDmitry Monakhov 460806a407f1SDmitry Monakhov return ret; 460906a407f1SDmitry Monakhov } 461006a407f1SDmitry Monakhov 4611ac27a0ecSDave Kleikamp /* 4612ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4613ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4614be4f27d3SYongqiang Yang * 4615be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 46168e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 46178e8ad8a5SJan Kara * modifications. 4618ac27a0ecSDave Kleikamp */ 4619c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4620ac27a0ecSDave Kleikamp { 4621c4be0c1dSTakashi Sato int error = 0; 4622c4be0c1dSTakashi Sato journal_t *journal; 4623ac27a0ecSDave Kleikamp 46249ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 46259ca92389STheodore Ts'o return 0; 46269ca92389STheodore Ts'o 4627c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4628ac27a0ecSDave Kleikamp 4629bb044576STheodore Ts'o if (journal) { 4630ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4631dab291afSMingming Cao jbd2_journal_lock_updates(journal); 46327ffe1ea8SHidehiro Kawai 46337ffe1ea8SHidehiro Kawai /* 4634bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 4635bb044576STheodore Ts'o * flush the journal. 46367ffe1ea8SHidehiro Kawai */ 4637c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 46386b0310fbSEric Sandeen if (error < 0) 46396b0310fbSEric Sandeen goto out; 4640ac27a0ecSDave Kleikamp 4641ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4642e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 4643c642dc9eSEric Sandeen } 4644c642dc9eSEric Sandeen 4645e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 46466b0310fbSEric Sandeen out: 4647bb044576STheodore Ts'o if (journal) 46488e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 4649bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 46506b0310fbSEric Sandeen return error; 4651ac27a0ecSDave Kleikamp } 4652ac27a0ecSDave Kleikamp 4653ac27a0ecSDave Kleikamp /* 4654ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4655ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4656ac27a0ecSDave Kleikamp */ 4657c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4658ac27a0ecSDave Kleikamp { 46599ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 46609ca92389STheodore Ts'o return 0; 46619ca92389STheodore Ts'o 4662c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 46639ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4664e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 4665c642dc9eSEric Sandeen } 4666c642dc9eSEric Sandeen 4667e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4668c4be0c1dSTakashi Sato return 0; 4669ac27a0ecSDave Kleikamp } 4670ac27a0ecSDave Kleikamp 4671673c6100STheodore Ts'o /* 4672673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4673673c6100STheodore Ts'o */ 4674673c6100STheodore Ts'o struct ext4_mount_options { 4675673c6100STheodore Ts'o unsigned long s_mount_opt; 4676a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 467708cefc7aSEric W. Biederman kuid_t s_resuid; 467808cefc7aSEric W. Biederman kgid_t s_resgid; 4679673c6100STheodore Ts'o unsigned long s_commit_interval; 4680673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4681673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4682673c6100STheodore Ts'o int s_jquota_fmt; 4683a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 4684673c6100STheodore Ts'o #endif 4685673c6100STheodore Ts'o }; 4686673c6100STheodore Ts'o 4687617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4688ac27a0ecSDave Kleikamp { 4689617ba13bSMingming Cao struct ext4_super_block *es; 4690617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4691ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4692617ba13bSMingming Cao struct ext4_mount_options old_opts; 4693c79d967dSChristoph Hellwig int enable_quota = 0; 46948a266467STheodore Ts'o ext4_group_t g; 4695b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4696c5e06d10SJohann Lombardi int err = 0; 4697ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 469803dafb5fSChen Gang int i, j; 4699ac27a0ecSDave Kleikamp #endif 4700d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4701ac27a0ecSDave Kleikamp 4702ac27a0ecSDave Kleikamp /* Store the original options */ 4703ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4704ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4705a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4706ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4707ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4708ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 470930773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 471030773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4711ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4712ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4713a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 471403dafb5fSChen Gang if (sbi->s_qf_names[i]) { 471503dafb5fSChen Gang old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], 471603dafb5fSChen Gang GFP_KERNEL); 471703dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 471803dafb5fSChen Gang for (j = 0; j < i; j++) 471903dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 47203e36a163SWei Yongjun kfree(orig_data); 472103dafb5fSChen Gang return -ENOMEM; 472203dafb5fSChen Gang } 472303dafb5fSChen Gang } else 472403dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 4725ac27a0ecSDave Kleikamp #endif 4726b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4727b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4728ac27a0ecSDave Kleikamp 4729661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4730ac27a0ecSDave Kleikamp err = -EINVAL; 4731ac27a0ecSDave Kleikamp goto restore_opts; 4732ac27a0ecSDave Kleikamp } 4733ac27a0ecSDave Kleikamp 47346b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 47356b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 47366b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 47372d5b86e0SEric Sandeen "during remount not supported; ignoring"); 47382d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 4739c6d3d56dSDarrick J. Wong } 4740c6d3d56dSDarrick J. Wong 47416ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 47426ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 47436ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 47446ae6514bSPiotr Sarna "both data=journal and delalloc"); 47456ae6514bSPiotr Sarna err = -EINVAL; 47466ae6514bSPiotr Sarna goto restore_opts; 47476ae6514bSPiotr Sarna } 47486ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 47496ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 47506ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 47516ae6514bSPiotr Sarna err = -EINVAL; 47526ae6514bSPiotr Sarna goto restore_opts; 47536ae6514bSPiotr Sarna } 4754923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 4755923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 4756923ae0ffSRoss Zwisler "both data=journal and dax"); 4757923ae0ffSRoss Zwisler err = -EINVAL; 4758923ae0ffSRoss Zwisler goto restore_opts; 4759923ae0ffSRoss Zwisler } 4760923ae0ffSRoss Zwisler } 4761923ae0ffSRoss Zwisler 4762923ae0ffSRoss Zwisler if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { 4763923ae0ffSRoss Zwisler ext4_msg(sb, KERN_WARNING, "warning: refusing change of " 4764923ae0ffSRoss Zwisler "dax flag with busy inodes while remounting"); 4765923ae0ffSRoss Zwisler sbi->s_mount_opt ^= EXT4_MOUNT_DAX; 47666ae6514bSPiotr Sarna } 47676ae6514bSPiotr Sarna 47684ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4769c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4770ac27a0ecSDave Kleikamp 4771ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4772482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4773ac27a0ecSDave Kleikamp 4774ac27a0ecSDave Kleikamp es = sbi->s_es; 4775ac27a0ecSDave Kleikamp 4776b3881f74STheodore Ts'o if (sbi->s_journal) { 4777617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4778b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4779b3881f74STheodore Ts'o } 4780ac27a0ecSDave Kleikamp 4781a2fd66d0STheodore Ts'o if (*flags & MS_LAZYTIME) 4782a2fd66d0STheodore Ts'o sb->s_flags |= MS_LAZYTIME; 4783a2fd66d0STheodore Ts'o 4784661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 47854ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4786ac27a0ecSDave Kleikamp err = -EROFS; 4787ac27a0ecSDave Kleikamp goto restore_opts; 4788ac27a0ecSDave Kleikamp } 4789ac27a0ecSDave Kleikamp 4790ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 479138c03b34STheodore Ts'o err = sync_filesystem(sb); 479238c03b34STheodore Ts'o if (err < 0) 479338c03b34STheodore Ts'o goto restore_opts; 47940f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 47950f0dd62fSChristoph Hellwig if (err < 0) 4796c79d967dSChristoph Hellwig goto restore_opts; 4797c79d967dSChristoph Hellwig 4798ac27a0ecSDave Kleikamp /* 4799ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4800ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4801ac27a0ecSDave Kleikamp */ 4802ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4803ac27a0ecSDave Kleikamp 4804ac27a0ecSDave Kleikamp /* 4805ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4806ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4807ac27a0ecSDave Kleikamp * mark the partition as valid again. 4808ac27a0ecSDave Kleikamp */ 4809617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4810617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4811ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4812ac27a0ecSDave Kleikamp 4813a63c9eb2STheodore Ts'o if (sbi->s_journal) 4814617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4815ac27a0ecSDave Kleikamp } else { 4816a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4817e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 48182cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 4819ac27a0ecSDave Kleikamp err = -EROFS; 4820ac27a0ecSDave Kleikamp goto restore_opts; 4821ac27a0ecSDave Kleikamp } 4822ead6596bSEric Sandeen /* 48238a266467STheodore Ts'o * Make sure the group descriptor checksums 48240b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 48258a266467STheodore Ts'o */ 48268a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 48278a266467STheodore Ts'o struct ext4_group_desc *gdp = 48288a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 48298a266467STheodore Ts'o 4830feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 4831b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4832b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 4833e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 48348a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 48356a797d27SDarrick J. Wong err = -EFSBADCRC; 48368a266467STheodore Ts'o goto restore_opts; 48378a266467STheodore Ts'o } 48388a266467STheodore Ts'o } 48398a266467STheodore Ts'o 48408a266467STheodore Ts'o /* 4841ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4842ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4843ead6596bSEric Sandeen * require a full umount/remount for now. 4844ead6596bSEric Sandeen */ 4845ead6596bSEric Sandeen if (es->s_last_orphan) { 4846b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4847ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4848ead6596bSEric Sandeen "orphan inode list. Please " 4849b31e1552SEric Sandeen "umount/remount instead"); 4850ead6596bSEric Sandeen err = -EINVAL; 4851ead6596bSEric Sandeen goto restore_opts; 4852ead6596bSEric Sandeen } 4853ead6596bSEric Sandeen 4854ac27a0ecSDave Kleikamp /* 4855ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4856ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4857ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4858ac27a0ecSDave Kleikamp * the partition.) 4859ac27a0ecSDave Kleikamp */ 48600390131bSFrank Mayhar if (sbi->s_journal) 4861617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4862ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4863617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4864ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4865e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 4866c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 4867c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 4868c5e06d10SJohann Lombardi err = -EROFS; 4869c5e06d10SJohann Lombardi goto restore_opts; 4870c5e06d10SJohann Lombardi } 4871c79d967dSChristoph Hellwig enable_quota = 1; 4872ac27a0ecSDave Kleikamp } 4873ac27a0ecSDave Kleikamp } 4874bfff6873SLukas Czerner 4875bfff6873SLukas Czerner /* 4876bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4877bfff6873SLukas Czerner * current settings 4878bfff6873SLukas Czerner */ 4879bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4880bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4881bfff6873SLukas Czerner else { 4882bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4883bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4884bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4885bfff6873SLukas Czerner } 4886bfff6873SLukas Czerner 48876fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 4888d096ad0fSMichael Tokarev if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) 4889e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 48900390131bSFrank Mayhar 4891ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4892ac27a0ecSDave Kleikamp /* Release old quota file names */ 4893a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4894ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 48957c319d32SAditya Kali if (enable_quota) { 48967c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 48970f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 4898e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 48997c319d32SAditya Kali err = ext4_enable_quotas(sb); 490007724f98STheodore Ts'o if (err) 49017c319d32SAditya Kali goto restore_opts; 49027c319d32SAditya Kali } 49037c319d32SAditya Kali } 49047c319d32SAditya Kali #endif 4905d4c402d9SCurt Wohlgemuth 4906a26f4992STheodore Ts'o *flags = (*flags & ~MS_LAZYTIME) | (sb->s_flags & MS_LAZYTIME); 4907d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 4908d4c402d9SCurt Wohlgemuth kfree(orig_data); 4909ac27a0ecSDave Kleikamp return 0; 49100b8e58a1SAndreas Dilger 4911ac27a0ecSDave Kleikamp restore_opts: 4912ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 4913ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 4914a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 4915ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 4916ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 4917ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 491830773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 491930773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 4920ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4921ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 4922a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 4923ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4924ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 4925ac27a0ecSDave Kleikamp } 4926ac27a0ecSDave Kleikamp #endif 4927d4c402d9SCurt Wohlgemuth kfree(orig_data); 4928ac27a0ecSDave Kleikamp return err; 4929ac27a0ecSDave Kleikamp } 4930ac27a0ecSDave Kleikamp 4931689c958cSLi Xi #ifdef CONFIG_QUOTA 4932689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 4933689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 4934689c958cSLi Xi { 4935689c958cSLi Xi struct kqid qid; 4936689c958cSLi Xi struct dquot *dquot; 4937689c958cSLi Xi u64 limit; 4938689c958cSLi Xi u64 curblock; 4939689c958cSLi Xi 4940689c958cSLi Xi qid = make_kqid_projid(projid); 4941689c958cSLi Xi dquot = dqget(sb, qid); 4942689c958cSLi Xi if (IS_ERR(dquot)) 4943689c958cSLi Xi return PTR_ERR(dquot); 4944689c958cSLi Xi spin_lock(&dq_data_lock); 4945689c958cSLi Xi 4946689c958cSLi Xi limit = (dquot->dq_dqb.dqb_bsoftlimit ? 4947689c958cSLi Xi dquot->dq_dqb.dqb_bsoftlimit : 4948689c958cSLi Xi dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits; 4949689c958cSLi Xi if (limit && buf->f_blocks > limit) { 4950689c958cSLi Xi curblock = dquot->dq_dqb.dqb_curspace >> sb->s_blocksize_bits; 4951689c958cSLi Xi buf->f_blocks = limit; 4952689c958cSLi Xi buf->f_bfree = buf->f_bavail = 4953689c958cSLi Xi (buf->f_blocks > curblock) ? 4954689c958cSLi Xi (buf->f_blocks - curblock) : 0; 4955689c958cSLi Xi } 4956689c958cSLi Xi 4957689c958cSLi Xi limit = dquot->dq_dqb.dqb_isoftlimit ? 4958689c958cSLi Xi dquot->dq_dqb.dqb_isoftlimit : 4959689c958cSLi Xi dquot->dq_dqb.dqb_ihardlimit; 4960689c958cSLi Xi if (limit && buf->f_files > limit) { 4961689c958cSLi Xi buf->f_files = limit; 4962689c958cSLi Xi buf->f_ffree = 4963689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 4964689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 4965689c958cSLi Xi } 4966689c958cSLi Xi 4967689c958cSLi Xi spin_unlock(&dq_data_lock); 4968689c958cSLi Xi dqput(dquot); 4969689c958cSLi Xi return 0; 4970689c958cSLi Xi } 4971689c958cSLi Xi #endif 4972689c958cSLi Xi 4973617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 4974ac27a0ecSDave Kleikamp { 4975ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 4976617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4977617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 497827dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 4979960cc398SPekka Enberg u64 fsid; 4980d02a9391SKazuya Mio s64 bfree; 498127dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 4982ac27a0ecSDave Kleikamp 4983952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 4984952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 4985ac27a0ecSDave Kleikamp 4986617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 4987ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 4988b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 498957042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 499057042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 4991d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 499257042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 499327dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 499427dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 499527dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 4996ac27a0ecSDave Kleikamp buf->f_bavail = 0; 4997ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 499852d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 4999617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 5000960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 5001960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 5002960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 5003960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 50040b8e58a1SAndreas Dilger 5005689c958cSLi Xi #ifdef CONFIG_QUOTA 5006689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 5007689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 5008689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 5009689c958cSLi Xi #endif 5010ac27a0ecSDave Kleikamp return 0; 5011ac27a0ecSDave Kleikamp } 5012ac27a0ecSDave Kleikamp 50130b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 50140b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 5015ac27a0ecSDave Kleikamp * Process 1 Process 2 5016617ba13bSMingming Cao * ext4_create() quota_sync() 5017dab291afSMingming Cao * jbd2_journal_start() write_dquot() 5018871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 5019dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 5020ac27a0ecSDave Kleikamp * 5021ac27a0ecSDave Kleikamp */ 5022ac27a0ecSDave Kleikamp 5023ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5024ac27a0ecSDave Kleikamp 5025ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 5026ac27a0ecSDave Kleikamp { 50274c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 5028ac27a0ecSDave Kleikamp } 5029ac27a0ecSDave Kleikamp 5030617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 5031ac27a0ecSDave Kleikamp { 5032ac27a0ecSDave Kleikamp int ret, err; 5033ac27a0ecSDave Kleikamp handle_t *handle; 5034ac27a0ecSDave Kleikamp struct inode *inode; 5035ac27a0ecSDave Kleikamp 5036ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 50379924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 5038617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 5039ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5040ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5041ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 5042617ba13bSMingming Cao err = ext4_journal_stop(handle); 5043ac27a0ecSDave Kleikamp if (!ret) 5044ac27a0ecSDave Kleikamp ret = err; 5045ac27a0ecSDave Kleikamp return ret; 5046ac27a0ecSDave Kleikamp } 5047ac27a0ecSDave Kleikamp 5048617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 5049ac27a0ecSDave Kleikamp { 5050ac27a0ecSDave Kleikamp int ret, err; 5051ac27a0ecSDave Kleikamp handle_t *handle; 5052ac27a0ecSDave Kleikamp 50539924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5054617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 5055ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5056ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5057ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 5058617ba13bSMingming Cao err = ext4_journal_stop(handle); 5059ac27a0ecSDave Kleikamp if (!ret) 5060ac27a0ecSDave Kleikamp ret = err; 5061ac27a0ecSDave Kleikamp return ret; 5062ac27a0ecSDave Kleikamp } 5063ac27a0ecSDave Kleikamp 5064617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 5065ac27a0ecSDave Kleikamp { 5066ac27a0ecSDave Kleikamp int ret, err; 5067ac27a0ecSDave Kleikamp handle_t *handle; 5068ac27a0ecSDave Kleikamp 50699924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5070617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 50719c3013e9SJan Kara if (IS_ERR(handle)) { 50729c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 50739c3013e9SJan Kara dquot_release(dquot); 5074ac27a0ecSDave Kleikamp return PTR_ERR(handle); 50759c3013e9SJan Kara } 5076ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 5077617ba13bSMingming Cao err = ext4_journal_stop(handle); 5078ac27a0ecSDave Kleikamp if (!ret) 5079ac27a0ecSDave Kleikamp ret = err; 5080ac27a0ecSDave Kleikamp return ret; 5081ac27a0ecSDave Kleikamp } 5082ac27a0ecSDave Kleikamp 5083617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 5084ac27a0ecSDave Kleikamp { 5085262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 5086262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5087262b4662SJan Kara 50882c8be6b2SJan Kara /* Are we journaling quotas? */ 5089e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) || 5090262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 5091ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 5092617ba13bSMingming Cao return ext4_write_dquot(dquot); 5093ac27a0ecSDave Kleikamp } else { 5094ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 5095ac27a0ecSDave Kleikamp } 5096ac27a0ecSDave Kleikamp } 5097ac27a0ecSDave Kleikamp 5098617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 5099ac27a0ecSDave Kleikamp { 5100ac27a0ecSDave Kleikamp int ret, err; 5101ac27a0ecSDave Kleikamp handle_t *handle; 5102ac27a0ecSDave Kleikamp 5103ac27a0ecSDave Kleikamp /* Data block + inode block */ 51042b0143b5SDavid Howells handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); 5105ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5106ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5107ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 5108617ba13bSMingming Cao err = ext4_journal_stop(handle); 5109ac27a0ecSDave Kleikamp if (!ret) 5110ac27a0ecSDave Kleikamp ret = err; 5111ac27a0ecSDave Kleikamp return ret; 5112ac27a0ecSDave Kleikamp } 5113ac27a0ecSDave Kleikamp 5114ac27a0ecSDave Kleikamp /* 5115ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 5116ac27a0ecSDave Kleikamp * the quota file and such... 5117ac27a0ecSDave Kleikamp */ 5118617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 5119ac27a0ecSDave Kleikamp { 5120287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 5121617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 5122ac27a0ecSDave Kleikamp } 5123ac27a0ecSDave Kleikamp 5124daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 5125daf647d2STheodore Ts'o { 5126daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 5127daf647d2STheodore Ts'o 5128daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 5129daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 5130daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 5131daf647d2STheodore Ts'o * because the name of the lock is set using the 5132daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 5133daf647d2STheodore Ts'o */ 5134daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 5135daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 5136daf647d2STheodore Ts'o } 5137daf647d2STheodore Ts'o 5138ac27a0ecSDave Kleikamp /* 5139ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 5140ac27a0ecSDave Kleikamp */ 5141617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 5142f00c9e44SJan Kara struct path *path) 5143ac27a0ecSDave Kleikamp { 5144ac27a0ecSDave Kleikamp int err; 5145ac27a0ecSDave Kleikamp 5146ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 5147ac27a0ecSDave Kleikamp return -EINVAL; 51480623543bSJan Kara 5149ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 5150d8c9584eSAl Viro if (path->dentry->d_sb != sb) 5151ac27a0ecSDave Kleikamp return -EXDEV; 51520623543bSJan Kara /* Journaling quota? */ 51530623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 51542b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 5155f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 5156b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 5157b31e1552SEric Sandeen "Quota file not on filesystem root. " 5158b31e1552SEric Sandeen "Journaled quota will not work"); 51590623543bSJan Kara } 51600623543bSJan Kara 51610623543bSJan Kara /* 51620623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 51630623543bSJan Kara * all updates to the file when we bypass pagecache... 51640623543bSJan Kara */ 51650390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 51662b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 51670623543bSJan Kara /* 51680623543bSJan Kara * We don't need to lock updates but journal_flush() could 51690623543bSJan Kara * otherwise be livelocked... 51700623543bSJan Kara */ 51710623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 51727ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 51730623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 5174f00c9e44SJan Kara if (err) 51757ffe1ea8SHidehiro Kawai return err; 51767ffe1ea8SHidehiro Kawai } 5177daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 5178daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 5179daf647d2STheodore Ts'o if (err) 5180daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, 5181daf647d2STheodore Ts'o I_DATA_SEM_NORMAL); 5182daf647d2STheodore Ts'o return err; 5183ac27a0ecSDave Kleikamp } 5184ac27a0ecSDave Kleikamp 51857c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 51867c319d32SAditya Kali unsigned int flags) 51877c319d32SAditya Kali { 51887c319d32SAditya Kali int err; 51897c319d32SAditya Kali struct inode *qf_inode; 5190a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 51917c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 5192689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 5193689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 51947c319d32SAditya Kali }; 51957c319d32SAditya Kali 5196e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 51977c319d32SAditya Kali 51987c319d32SAditya Kali if (!qf_inums[type]) 51997c319d32SAditya Kali return -EPERM; 52007c319d32SAditya Kali 52017c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 52027c319d32SAditya Kali if (IS_ERR(qf_inode)) { 52037c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 52047c319d32SAditya Kali return PTR_ERR(qf_inode); 52057c319d32SAditya Kali } 52067c319d32SAditya Kali 5207bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 5208bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 5209daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 52107c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 52117c319d32SAditya Kali iput(qf_inode); 5212daf647d2STheodore Ts'o if (err) 5213daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 52147c319d32SAditya Kali 52157c319d32SAditya Kali return err; 52167c319d32SAditya Kali } 52177c319d32SAditya Kali 52187c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 52197c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 52207c319d32SAditya Kali { 52217c319d32SAditya Kali int type, err = 0; 5222a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 52237c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 5224689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 5225689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 52267c319d32SAditya Kali }; 52277c319d32SAditya Kali 52287c319d32SAditya Kali sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; 5229a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 52307c319d32SAditya Kali if (qf_inums[type]) { 52317c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 52327c319d32SAditya Kali DQUOT_USAGE_ENABLED); 52337c319d32SAditya Kali if (err) { 52347c319d32SAditya Kali ext4_warning(sb, 523572ba7450STheodore Ts'o "Failed to enable quota tracking " 523672ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 523772ba7450STheodore Ts'o "e2fsck to fix.", type, err); 52387c319d32SAditya Kali return err; 52397c319d32SAditya Kali } 52407c319d32SAditya Kali } 52417c319d32SAditya Kali } 52427c319d32SAditya Kali return 0; 52437c319d32SAditya Kali } 52447c319d32SAditya Kali 5245ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5246ca0e05e4SDmitry Monakhov { 524721f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 524821f97697SJan Kara handle_t *handle; 524921f97697SJan Kara 525087009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 525187009d86SDmitry Monakhov * Caller already holds s_umount sem */ 525287009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5253ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5254ca0e05e4SDmitry Monakhov 52550b268590SAmir Goldstein if (!inode) 52560b268590SAmir Goldstein goto out; 52570b268590SAmir Goldstein 525821f97697SJan Kara /* Update modification times of quota files when userspace can 525921f97697SJan Kara * start looking at them */ 52609924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 526121f97697SJan Kara if (IS_ERR(handle)) 526221f97697SJan Kara goto out; 526321f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 526421f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 526521f97697SJan Kara ext4_journal_stop(handle); 526621f97697SJan Kara 526721f97697SJan Kara out: 5268ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5269ca0e05e4SDmitry Monakhov } 5270ca0e05e4SDmitry Monakhov 5271ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5272ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5273ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5274ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5275617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5276ac27a0ecSDave Kleikamp size_t len, loff_t off) 5277ac27a0ecSDave Kleikamp { 5278ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5279725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5280ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5281ac27a0ecSDave Kleikamp int tocopy; 5282ac27a0ecSDave Kleikamp size_t toread; 5283ac27a0ecSDave Kleikamp struct buffer_head *bh; 5284ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5285ac27a0ecSDave Kleikamp 5286ac27a0ecSDave Kleikamp if (off > i_size) 5287ac27a0ecSDave Kleikamp return 0; 5288ac27a0ecSDave Kleikamp if (off+len > i_size) 5289ac27a0ecSDave Kleikamp len = i_size-off; 5290ac27a0ecSDave Kleikamp toread = len; 5291ac27a0ecSDave Kleikamp while (toread > 0) { 5292ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5293ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 52941c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 52951c215028STheodore Ts'o if (IS_ERR(bh)) 52961c215028STheodore Ts'o return PTR_ERR(bh); 5297ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5298ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5299ac27a0ecSDave Kleikamp else 5300ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5301ac27a0ecSDave Kleikamp brelse(bh); 5302ac27a0ecSDave Kleikamp offset = 0; 5303ac27a0ecSDave Kleikamp toread -= tocopy; 5304ac27a0ecSDave Kleikamp data += tocopy; 5305ac27a0ecSDave Kleikamp blk++; 5306ac27a0ecSDave Kleikamp } 5307ac27a0ecSDave Kleikamp return len; 5308ac27a0ecSDave Kleikamp } 5309ac27a0ecSDave Kleikamp 5310ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5311ac27a0ecSDave Kleikamp * enough credits) */ 5312617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5313ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5314ac27a0ecSDave Kleikamp { 5315ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5316725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 53171c215028STheodore Ts'o int err, offset = off & (sb->s_blocksize - 1); 5318c5e298aeSTheodore Ts'o int retries = 0; 5319ac27a0ecSDave Kleikamp struct buffer_head *bh; 5320ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5321ac27a0ecSDave Kleikamp 53220390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5323b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5324b31e1552SEric Sandeen " cancelled because transaction is not started", 53259c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 53269c3013e9SJan Kara return -EIO; 53279c3013e9SJan Kara } 532867eeb568SDmitry Monakhov /* 532967eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 533067eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 533167eeb568SDmitry Monakhov */ 533267eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 533367eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 533467eeb568SDmitry Monakhov " cancelled because not block aligned", 533567eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 533667eeb568SDmitry Monakhov return -EIO; 533767eeb568SDmitry Monakhov } 533867eeb568SDmitry Monakhov 5339c5e298aeSTheodore Ts'o do { 5340c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 5341c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 5342c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 5343c5e298aeSTheodore Ts'o } while (IS_ERR(bh) && (PTR_ERR(bh) == -ENOSPC) && 5344c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 53451c215028STheodore Ts'o if (IS_ERR(bh)) 53461c215028STheodore Ts'o return PTR_ERR(bh); 5347ac27a0ecSDave Kleikamp if (!bh) 5348ac27a0ecSDave Kleikamp goto out; 53495d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 5350617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5351ac27a0ecSDave Kleikamp if (err) { 5352ac27a0ecSDave Kleikamp brelse(bh); 53531c215028STheodore Ts'o return err; 5354ac27a0ecSDave Kleikamp } 5355ac27a0ecSDave Kleikamp lock_buffer(bh); 535667eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5357ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5358ac27a0ecSDave Kleikamp unlock_buffer(bh); 53590390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5360ac27a0ecSDave Kleikamp brelse(bh); 5361ac27a0ecSDave Kleikamp out: 536267eeb568SDmitry Monakhov if (inode->i_size < off + len) { 536367eeb568SDmitry Monakhov i_size_write(inode, off + len); 5364617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5365617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 536621f97697SJan Kara } 536767eeb568SDmitry Monakhov return len; 5368ac27a0ecSDave Kleikamp } 5369ac27a0ecSDave Kleikamp 53708f0e8746STheodore Ts'o static int ext4_get_next_id(struct super_block *sb, struct kqid *qid) 53718f0e8746STheodore Ts'o { 53728f0e8746STheodore Ts'o const struct quota_format_ops *ops; 53738f0e8746STheodore Ts'o 53748f0e8746STheodore Ts'o if (!sb_has_quota_loaded(sb, qid->type)) 53758f0e8746STheodore Ts'o return -ESRCH; 53768f0e8746STheodore Ts'o ops = sb_dqopt(sb)->ops[qid->type]; 53778f0e8746STheodore Ts'o if (!ops || !ops->get_next_id) 53788f0e8746STheodore Ts'o return -ENOSYS; 53798f0e8746STheodore Ts'o return dquot_get_next_id(sb, qid); 53808f0e8746STheodore Ts'o } 5381ac27a0ecSDave Kleikamp #endif 5382ac27a0ecSDave Kleikamp 5383152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5384152a0836SAl Viro const char *dev_name, void *data) 5385ac27a0ecSDave Kleikamp { 5386152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5387ac27a0ecSDave Kleikamp } 5388ac27a0ecSDave Kleikamp 5389c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 539024b58424STheodore Ts'o static inline void register_as_ext2(void) 539124b58424STheodore Ts'o { 539224b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 539324b58424STheodore Ts'o if (err) 539424b58424STheodore Ts'o printk(KERN_WARNING 539524b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 539624b58424STheodore Ts'o } 539724b58424STheodore Ts'o 539824b58424STheodore Ts'o static inline void unregister_as_ext2(void) 539924b58424STheodore Ts'o { 540024b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 540124b58424STheodore Ts'o } 54022035e776STheodore Ts'o 54032035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 54042035e776STheodore Ts'o { 5405e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 54062035e776STheodore Ts'o return 0; 54072035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 54082035e776STheodore Ts'o return 1; 5409e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 54102035e776STheodore Ts'o return 0; 54112035e776STheodore Ts'o return 1; 54122035e776STheodore Ts'o } 541324b58424STheodore Ts'o #else 541424b58424STheodore Ts'o static inline void register_as_ext2(void) { } 541524b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 54162035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 541724b58424STheodore Ts'o #endif 541824b58424STheodore Ts'o 541924b58424STheodore Ts'o static inline void register_as_ext3(void) 542024b58424STheodore Ts'o { 542124b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 542224b58424STheodore Ts'o if (err) 542324b58424STheodore Ts'o printk(KERN_WARNING 542424b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 542524b58424STheodore Ts'o } 542624b58424STheodore Ts'o 542724b58424STheodore Ts'o static inline void unregister_as_ext3(void) 542824b58424STheodore Ts'o { 542924b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 543024b58424STheodore Ts'o } 54312035e776STheodore Ts'o 54322035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 54332035e776STheodore Ts'o { 5434e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 54352035e776STheodore Ts'o return 0; 5436e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 54372035e776STheodore Ts'o return 0; 54382035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 54392035e776STheodore Ts'o return 1; 5440e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 54412035e776STheodore Ts'o return 0; 54422035e776STheodore Ts'o return 1; 54432035e776STheodore Ts'o } 544424b58424STheodore Ts'o 544503010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5446ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 544703010a33STheodore Ts'o .name = "ext4", 5448152a0836SAl Viro .mount = ext4_mount, 5449ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5450ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5451ac27a0ecSDave Kleikamp }; 54527f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 5453ac27a0ecSDave Kleikamp 5454e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5455e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5456e9e3bcecSEric Sandeen 54575dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5458ac27a0ecSDave Kleikamp { 5459e9e3bcecSEric Sandeen int i, err; 5460c9de560dSAlex Tomas 5461e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 546207c0c5d8SAl Viro ext4_li_info = NULL; 546307c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 546407c0c5d8SAl Viro 54659a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 546612e9b892SDmitry Monakhov ext4_check_flag_values(); 5467e9e3bcecSEric Sandeen 5468e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 5469e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5470e9e3bcecSEric Sandeen 547151865fdaSZheng Liu err = ext4_init_es(); 54726fd058f7STheodore Ts'o if (err) 54736fd058f7STheodore Ts'o return err; 547451865fdaSZheng Liu 547551865fdaSZheng Liu err = ext4_init_pageio(); 547651865fdaSZheng Liu if (err) 5477b5799018STheodore Ts'o goto out5; 547851865fdaSZheng Liu 54795dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5480bd2d0210STheodore Ts'o if (err) 5481b5799018STheodore Ts'o goto out4; 5482857ac889SLukas Czerner 5483b5799018STheodore Ts'o err = ext4_init_sysfs(); 5484dd68314cSTheodore Ts'o if (err) 5485b5799018STheodore Ts'o goto out3; 5486857ac889SLukas Czerner 54875dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5488ac27a0ecSDave Kleikamp if (err) 5489c9de560dSAlex Tomas goto out2; 5490ac27a0ecSDave Kleikamp err = init_inodecache(); 5491ac27a0ecSDave Kleikamp if (err) 5492ac27a0ecSDave Kleikamp goto out1; 549324b58424STheodore Ts'o register_as_ext3(); 54942035e776STheodore Ts'o register_as_ext2(); 549503010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5496ac27a0ecSDave Kleikamp if (err) 5497ac27a0ecSDave Kleikamp goto out; 5498bfff6873SLukas Czerner 5499ac27a0ecSDave Kleikamp return 0; 5500ac27a0ecSDave Kleikamp out: 550124b58424STheodore Ts'o unregister_as_ext2(); 550224b58424STheodore Ts'o unregister_as_ext3(); 5503ac27a0ecSDave Kleikamp destroy_inodecache(); 5504ac27a0ecSDave Kleikamp out1: 55055dabfc78STheodore Ts'o ext4_exit_mballoc(); 55069c191f70ST Makphaibulchoke out2: 5507b5799018STheodore Ts'o ext4_exit_sysfs(); 5508b5799018STheodore Ts'o out3: 5509dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5510b5799018STheodore Ts'o out4: 55115dabfc78STheodore Ts'o ext4_exit_pageio(); 5512b5799018STheodore Ts'o out5: 551351865fdaSZheng Liu ext4_exit_es(); 551451865fdaSZheng Liu 5515ac27a0ecSDave Kleikamp return err; 5516ac27a0ecSDave Kleikamp } 5517ac27a0ecSDave Kleikamp 55185dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5519ac27a0ecSDave Kleikamp { 5520bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 552124b58424STheodore Ts'o unregister_as_ext2(); 552224b58424STheodore Ts'o unregister_as_ext3(); 552303010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5524ac27a0ecSDave Kleikamp destroy_inodecache(); 55255dabfc78STheodore Ts'o ext4_exit_mballoc(); 5526b5799018STheodore Ts'o ext4_exit_sysfs(); 55275dabfc78STheodore Ts'o ext4_exit_system_zone(); 55285dabfc78STheodore Ts'o ext4_exit_pageio(); 5529dd12ed14SEric Sandeen ext4_exit_es(); 5530ac27a0ecSDave Kleikamp } 5531ac27a0ecSDave Kleikamp 5532ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 553383982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5534ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 55355dabfc78STheodore Ts'o module_init(ext4_init_fs) 55365dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5537