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; 589c191f70ST Makphaibulchoke static int ext4_mballoc_ready; 59e294a537STheodore Ts'o static struct ratelimit_state ext4_mount_msg_ratelimit; 609f6200bbSTheodore Ts'o 61617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 62ac27a0ecSDave Kleikamp unsigned long journal_devnum); 632adf6da8STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root); 64e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 65617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 66617ba13bSMingming Cao struct ext4_super_block *es); 67617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 68617ba13bSMingming Cao struct ext4_super_block *es); 69617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 70617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 71617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 72c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 73c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 74152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 75152a0836SAl Viro const char *dev_name, void *data); 762035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 772035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 78d39195c3SAmir Goldstein static int ext4_feature_set_ok(struct super_block *sb, int readonly); 79bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 80bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 818f1f7453SEric Sandeen static void ext4_clear_request_list(void); 82ac27a0ecSDave Kleikamp 83e74031fdSJan Kara /* 84e74031fdSJan Kara * Lock ordering 85e74031fdSJan Kara * 86e74031fdSJan Kara * Note the difference between i_mmap_sem (EXT4_I(inode)->i_mmap_sem) and 87e74031fdSJan Kara * i_mmap_rwsem (inode->i_mmap_rwsem)! 88e74031fdSJan Kara * 89e74031fdSJan Kara * page fault path: 90e74031fdSJan Kara * mmap_sem -> sb_start_pagefault -> i_mmap_sem (r) -> transaction start -> 91e74031fdSJan Kara * page lock -> i_data_sem (rw) 92e74031fdSJan Kara * 93e74031fdSJan Kara * buffered write path: 94e74031fdSJan Kara * sb_start_write -> i_mutex -> mmap_sem 95e74031fdSJan Kara * sb_start_write -> i_mutex -> transaction start -> page lock -> 96e74031fdSJan Kara * i_data_sem (rw) 97e74031fdSJan Kara * 98e74031fdSJan Kara * truncate: 99e74031fdSJan Kara * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (w) -> i_mmap_sem (w) -> 100e74031fdSJan Kara * i_mmap_rwsem (w) -> page lock 101e74031fdSJan Kara * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (w) -> i_mmap_sem (w) -> 102e74031fdSJan Kara * transaction start -> i_data_sem (rw) 103e74031fdSJan Kara * 104e74031fdSJan Kara * direct IO: 105e74031fdSJan Kara * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (r) -> mmap_sem 106e74031fdSJan Kara * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (r) -> 107e74031fdSJan Kara * transaction start -> i_data_sem (rw) 108e74031fdSJan Kara * 109e74031fdSJan Kara * writepages: 110e74031fdSJan Kara * transaction start -> page lock(s) -> i_data_sem (rw) 111e74031fdSJan Kara */ 112e74031fdSJan Kara 113c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 1142035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 1152035e776STheodore Ts'o .owner = THIS_MODULE, 1162035e776STheodore Ts'o .name = "ext2", 1172035e776STheodore Ts'o .mount = ext4_mount, 1182035e776STheodore Ts'o .kill_sb = kill_block_super, 1192035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 1202035e776STheodore Ts'o }; 1217f78e035SEric W. Biederman MODULE_ALIAS_FS("ext2"); 122fa7614ddSEric W. Biederman MODULE_ALIAS("ext2"); 1232035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 1242035e776STheodore Ts'o #else 1252035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 1262035e776STheodore Ts'o #endif 1272035e776STheodore Ts'o 1282035e776STheodore Ts'o 129ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 130ba69f9abSJan Kara .owner = THIS_MODULE, 131ba69f9abSJan Kara .name = "ext3", 132152a0836SAl Viro .mount = ext4_mount, 133ba69f9abSJan Kara .kill_sb = kill_block_super, 134ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 135ba69f9abSJan Kara }; 1367f78e035SEric W. Biederman MODULE_ALIAS_FS("ext3"); 137fa7614ddSEric W. Biederman MODULE_ALIAS("ext3"); 138ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 139bd81d8eeSLaurent Vivier 140d25425f8SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 141d25425f8SDarrick J. Wong struct ext4_super_block *es) 142d25425f8SDarrick J. Wong { 143e2b911c5SDarrick J. Wong if (!ext4_has_feature_metadata_csum(sb)) 144d25425f8SDarrick J. Wong return 1; 145d25425f8SDarrick J. Wong 146d25425f8SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 147d25425f8SDarrick J. Wong } 148d25425f8SDarrick J. Wong 149a9c47317SDarrick J. Wong static __le32 ext4_superblock_csum(struct super_block *sb, 150a9c47317SDarrick J. Wong struct ext4_super_block *es) 151a9c47317SDarrick J. Wong { 152a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 153a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 154a9c47317SDarrick J. Wong __u32 csum; 155a9c47317SDarrick J. Wong 156a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 157a9c47317SDarrick J. Wong 158a9c47317SDarrick J. Wong return cpu_to_le32(csum); 159a9c47317SDarrick J. Wong } 160a9c47317SDarrick J. Wong 161c197855eSStephen Hemminger static int ext4_superblock_csum_verify(struct super_block *sb, 162a9c47317SDarrick J. Wong struct ext4_super_block *es) 163a9c47317SDarrick J. Wong { 1649aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 165a9c47317SDarrick J. Wong return 1; 166a9c47317SDarrick J. Wong 167a9c47317SDarrick J. Wong return es->s_checksum == ext4_superblock_csum(sb, es); 168a9c47317SDarrick J. Wong } 169a9c47317SDarrick J. Wong 17006db49e6STheodore Ts'o void ext4_superblock_csum_set(struct super_block *sb) 171a9c47317SDarrick J. Wong { 17206db49e6STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 17306db49e6STheodore Ts'o 1749aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 175a9c47317SDarrick J. Wong return; 176a9c47317SDarrick J. Wong 177a9c47317SDarrick J. Wong es->s_checksum = ext4_superblock_csum(sb, es); 178a9c47317SDarrick J. Wong } 179a9c47317SDarrick J. Wong 1809933fc0aSTheodore Ts'o void *ext4_kvmalloc(size_t size, gfp_t flags) 1819933fc0aSTheodore Ts'o { 1829933fc0aSTheodore Ts'o void *ret; 1839933fc0aSTheodore Ts'o 1848be04b93SJoe Perches ret = kmalloc(size, flags | __GFP_NOWARN); 1859933fc0aSTheodore Ts'o if (!ret) 1869933fc0aSTheodore Ts'o ret = __vmalloc(size, flags, PAGE_KERNEL); 1879933fc0aSTheodore Ts'o return ret; 1889933fc0aSTheodore Ts'o } 1899933fc0aSTheodore Ts'o 1909933fc0aSTheodore Ts'o void *ext4_kvzalloc(size_t size, gfp_t flags) 1919933fc0aSTheodore Ts'o { 1929933fc0aSTheodore Ts'o void *ret; 1939933fc0aSTheodore Ts'o 1948be04b93SJoe Perches ret = kzalloc(size, flags | __GFP_NOWARN); 1959933fc0aSTheodore Ts'o if (!ret) 1969933fc0aSTheodore Ts'o ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); 1979933fc0aSTheodore Ts'o return ret; 1989933fc0aSTheodore Ts'o } 1999933fc0aSTheodore Ts'o 2008fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 2018fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 202bd81d8eeSLaurent Vivier { 2033a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 2048fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2058fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 206bd81d8eeSLaurent Vivier } 207bd81d8eeSLaurent Vivier 2088fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 2098fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 210bd81d8eeSLaurent Vivier { 2115272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 2128fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2138fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 214bd81d8eeSLaurent Vivier } 215bd81d8eeSLaurent Vivier 2168fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 2178fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 218bd81d8eeSLaurent Vivier { 2195272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 2208fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2218fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 222bd81d8eeSLaurent Vivier } 223bd81d8eeSLaurent Vivier 224021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 225560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 226560671a0SAneesh Kumar K.V { 227560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 228560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 229560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 230560671a0SAneesh Kumar K.V } 231560671a0SAneesh Kumar K.V 232560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 233560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 234560671a0SAneesh Kumar K.V { 235560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 236560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 237560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 238560671a0SAneesh Kumar K.V } 239560671a0SAneesh Kumar K.V 240560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 241560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 242560671a0SAneesh Kumar K.V { 243560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 244560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 245560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 246560671a0SAneesh Kumar K.V } 247560671a0SAneesh Kumar K.V 248560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 249560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 250560671a0SAneesh Kumar K.V { 251560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 252560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 253560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 254560671a0SAneesh Kumar K.V } 255560671a0SAneesh Kumar K.V 2568fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 2578fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 258bd81d8eeSLaurent Vivier { 2593a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 2608fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2618fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 262bd81d8eeSLaurent Vivier } 263bd81d8eeSLaurent Vivier 2648fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 2658fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 266bd81d8eeSLaurent Vivier { 2675272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 2688fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2698fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 270bd81d8eeSLaurent Vivier } 271bd81d8eeSLaurent Vivier 2728fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 2738fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 274bd81d8eeSLaurent Vivier { 2755272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 2768fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2778fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 278bd81d8eeSLaurent Vivier } 279bd81d8eeSLaurent Vivier 280021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 281560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 282560671a0SAneesh Kumar K.V { 283560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 284560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 285560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 286560671a0SAneesh Kumar K.V } 287560671a0SAneesh Kumar K.V 288560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 289560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 290560671a0SAneesh Kumar K.V { 291560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 292560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 293560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 294560671a0SAneesh Kumar K.V } 295560671a0SAneesh Kumar K.V 296560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 297560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 298560671a0SAneesh Kumar K.V { 299560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 300560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 301560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 302560671a0SAneesh Kumar K.V } 303560671a0SAneesh Kumar K.V 304560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 305560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 306560671a0SAneesh Kumar K.V { 307560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 308560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 309560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 310560671a0SAneesh Kumar K.V } 311560671a0SAneesh Kumar K.V 312d3d1faf6SCurt Wohlgemuth 3131c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 3141c13d5c0STheodore Ts'o unsigned int line) 3151c13d5c0STheodore Ts'o { 3161c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3171c13d5c0STheodore Ts'o 3181c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3191b46617bSTheodore Ts'o if (bdev_read_only(sb->s_bdev)) 3201b46617bSTheodore Ts'o return; 3211c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3221c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 3231c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3241c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 3251c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 3261c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 3271c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 3281c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 3291c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3301c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 3311c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 3321c13d5c0STheodore Ts'o } 33366e61a9eSTheodore Ts'o /* 33466e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 33566e61a9eSTheodore Ts'o * started already 33666e61a9eSTheodore Ts'o */ 33766e61a9eSTheodore Ts'o if (!es->s_error_count) 33866e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 339ba39ebb6SWei Yongjun le32_add_cpu(&es->s_error_count, 1); 3401c13d5c0STheodore Ts'o } 3411c13d5c0STheodore Ts'o 3421c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 3431c13d5c0STheodore Ts'o unsigned int line) 3441c13d5c0STheodore Ts'o { 3451c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 3461c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 3471c13d5c0STheodore Ts'o } 3481c13d5c0STheodore Ts'o 349bdfe0cbdSTheodore Ts'o /* 350bdfe0cbdSTheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 351bdfe0cbdSTheodore Ts'o * structures, including the bdi structure, without telling anyone 352bdfe0cbdSTheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 353bdfe0cbdSTheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 354bdfe0cbdSTheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 355bdfe0cbdSTheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 356bdfe0cbdSTheodore Ts'o */ 357bdfe0cbdSTheodore Ts'o static int block_device_ejected(struct super_block *sb) 358bdfe0cbdSTheodore Ts'o { 359bdfe0cbdSTheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 360bdfe0cbdSTheodore Ts'o struct backing_dev_info *bdi = inode_to_bdi(bd_inode); 361bdfe0cbdSTheodore Ts'o 362bdfe0cbdSTheodore Ts'o return bdi->dev == NULL; 363bdfe0cbdSTheodore Ts'o } 364bdfe0cbdSTheodore Ts'o 36518aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 36618aadd47SBobi Jam { 36718aadd47SBobi Jam struct super_block *sb = journal->j_private; 36818aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 36918aadd47SBobi Jam int error = is_journal_aborted(journal); 3705d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 37118aadd47SBobi Jam 3725d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 37318aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 3745d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 3755d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 3765d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 37718aadd47SBobi Jam list_del_init(&jce->jce_list); 37818aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 37918aadd47SBobi Jam jce->jce_func(sb, jce, error); 38018aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 38118aadd47SBobi Jam } 38218aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 38318aadd47SBobi Jam } 3841c13d5c0STheodore Ts'o 385ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 386ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 387ac27a0ecSDave Kleikamp * 388ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 389617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 390ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 391ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 392ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 393ac27a0ecSDave Kleikamp * write out the superblock safely. 394ac27a0ecSDave Kleikamp * 395dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 396d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 397ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 398ac27a0ecSDave Kleikamp */ 399ac27a0ecSDave Kleikamp 400617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 401ac27a0ecSDave Kleikamp { 402ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 403ac27a0ecSDave Kleikamp return; 404ac27a0ecSDave Kleikamp 405ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 406617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 407ac27a0ecSDave Kleikamp 4084ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 409ac27a0ecSDave Kleikamp if (journal) 410dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 411ac27a0ecSDave Kleikamp } 412ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 413b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 4144418e141SDmitry Monakhov /* 4154418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 4164418e141SDmitry Monakhov * before ->s_flags update 4174418e141SDmitry Monakhov */ 4184418e141SDmitry Monakhov smp_wmb(); 419ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 420ac27a0ecSDave Kleikamp } 4214327ba52SDaeho Jeong if (test_opt(sb, ERRORS_PANIC)) { 4224327ba52SDaeho Jeong if (EXT4_SB(sb)->s_journal && 4234327ba52SDaeho Jeong !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) 4244327ba52SDaeho Jeong return; 425617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 426ac27a0ecSDave Kleikamp sb->s_id); 427ac27a0ecSDave Kleikamp } 4284327ba52SDaeho Jeong } 429ac27a0ecSDave Kleikamp 430efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 431efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 432efbed4dcSTheodore Ts'o "EXT4-fs error") 433efbed4dcSTheodore Ts'o 43412062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 435c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 436ac27a0ecSDave Kleikamp { 4370ff2ea7dSJoe Perches struct va_format vaf; 438ac27a0ecSDave Kleikamp va_list args; 439ac27a0ecSDave Kleikamp 440efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 441ac27a0ecSDave Kleikamp va_start(args, fmt); 4420ff2ea7dSJoe Perches vaf.fmt = fmt; 4430ff2ea7dSJoe Perches vaf.va = &args; 444efbed4dcSTheodore Ts'o printk(KERN_CRIT 445efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 4460ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 447ac27a0ecSDave Kleikamp va_end(args); 448efbed4dcSTheodore Ts'o } 449f3fc0210STheodore Ts'o save_error_info(sb, function, line); 450617ba13bSMingming Cao ext4_handle_error(sb); 451ac27a0ecSDave Kleikamp } 452ac27a0ecSDave Kleikamp 453e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 454c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 455273df556SFrank Mayhar const char *fmt, ...) 456273df556SFrank Mayhar { 457273df556SFrank Mayhar va_list args; 458f7c21177STheodore Ts'o struct va_format vaf; 4591c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 460273df556SFrank Mayhar 4611c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4621c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 463efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 464273df556SFrank Mayhar va_start(args, fmt); 465f7c21177STheodore Ts'o vaf.fmt = fmt; 466f7c21177STheodore Ts'o vaf.va = &args; 467c398eda0STheodore Ts'o if (block) 468d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 469d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 470d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 471d9ee81daSJoe Perches block, current->comm, &vaf); 472d9ee81daSJoe Perches else 473d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 474d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 475d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 476d9ee81daSJoe Perches current->comm, &vaf); 477273df556SFrank Mayhar va_end(args); 478efbed4dcSTheodore Ts'o } 479efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 480273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 481273df556SFrank Mayhar } 482273df556SFrank Mayhar 483e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 484f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 485f7c21177STheodore Ts'o const char *fmt, ...) 486273df556SFrank Mayhar { 487273df556SFrank Mayhar va_list args; 488f7c21177STheodore Ts'o struct va_format vaf; 4891c13d5c0STheodore Ts'o struct ext4_super_block *es; 490496ad9aaSAl Viro struct inode *inode = file_inode(file); 491273df556SFrank Mayhar char pathname[80], *path; 492273df556SFrank Mayhar 4931c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 4941c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 495efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 4969bf39ab2SMiklos Szeredi path = file_path(file, pathname, sizeof(pathname)); 497f9a62d09SDan Carpenter if (IS_ERR(path)) 498273df556SFrank Mayhar path = "(unknown)"; 499f7c21177STheodore Ts'o va_start(args, fmt); 500f7c21177STheodore Ts'o vaf.fmt = fmt; 501f7c21177STheodore Ts'o vaf.va = &args; 502d9ee81daSJoe Perches if (block) 503d9ee81daSJoe Perches printk(KERN_CRIT 504d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 505d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 506d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 507d9ee81daSJoe Perches block, current->comm, path, &vaf); 508d9ee81daSJoe Perches else 509d9ee81daSJoe Perches printk(KERN_CRIT 510d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 511d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 512d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 513d9ee81daSJoe Perches current->comm, path, &vaf); 514273df556SFrank Mayhar va_end(args); 515efbed4dcSTheodore Ts'o } 516efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 517273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 518273df556SFrank Mayhar } 519273df556SFrank Mayhar 520722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 521ac27a0ecSDave Kleikamp char nbuf[16]) 522ac27a0ecSDave Kleikamp { 523ac27a0ecSDave Kleikamp char *errstr = NULL; 524ac27a0ecSDave Kleikamp 525ac27a0ecSDave Kleikamp switch (errno) { 5266a797d27SDarrick J. Wong case -EFSCORRUPTED: 5276a797d27SDarrick J. Wong errstr = "Corrupt filesystem"; 5286a797d27SDarrick J. Wong break; 5296a797d27SDarrick J. Wong case -EFSBADCRC: 5306a797d27SDarrick J. Wong errstr = "Filesystem failed CRC"; 5316a797d27SDarrick J. Wong break; 532ac27a0ecSDave Kleikamp case -EIO: 533ac27a0ecSDave Kleikamp errstr = "IO failure"; 534ac27a0ecSDave Kleikamp break; 535ac27a0ecSDave Kleikamp case -ENOMEM: 536ac27a0ecSDave Kleikamp errstr = "Out of memory"; 537ac27a0ecSDave Kleikamp break; 538ac27a0ecSDave Kleikamp case -EROFS: 53978f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 54078f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 541ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 542ac27a0ecSDave Kleikamp else 543ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 544ac27a0ecSDave Kleikamp break; 545ac27a0ecSDave Kleikamp default: 546ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 547ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 548ac27a0ecSDave Kleikamp * NULL. */ 549ac27a0ecSDave Kleikamp if (nbuf) { 550ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 551ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 552ac27a0ecSDave Kleikamp errstr = nbuf; 553ac27a0ecSDave Kleikamp } 554ac27a0ecSDave Kleikamp break; 555ac27a0ecSDave Kleikamp } 556ac27a0ecSDave Kleikamp 557ac27a0ecSDave Kleikamp return errstr; 558ac27a0ecSDave Kleikamp } 559ac27a0ecSDave Kleikamp 560617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 561ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 562ac27a0ecSDave Kleikamp 563c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 564c398eda0STheodore Ts'o unsigned int line, int errno) 565ac27a0ecSDave Kleikamp { 566ac27a0ecSDave Kleikamp char nbuf[16]; 567ac27a0ecSDave Kleikamp const char *errstr; 568ac27a0ecSDave Kleikamp 569ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 570ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 571ac27a0ecSDave Kleikamp * an error. */ 572ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 573ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 574ac27a0ecSDave Kleikamp return; 575ac27a0ecSDave Kleikamp 576efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 577617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 578c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 579c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 580efbed4dcSTheodore Ts'o } 581ac27a0ecSDave Kleikamp 582efbed4dcSTheodore Ts'o save_error_info(sb, function, line); 583617ba13bSMingming Cao ext4_handle_error(sb); 584ac27a0ecSDave Kleikamp } 585ac27a0ecSDave Kleikamp 586ac27a0ecSDave Kleikamp /* 587617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 588ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 589ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 590ac27a0ecSDave Kleikamp * 591ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 592ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 593ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 594ac27a0ecSDave Kleikamp */ 595ac27a0ecSDave Kleikamp 596c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 597c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 598ac27a0ecSDave Kleikamp { 599ac27a0ecSDave Kleikamp va_list args; 600ac27a0ecSDave Kleikamp 6011c13d5c0STheodore Ts'o save_error_info(sb, function, line); 602ac27a0ecSDave Kleikamp va_start(args, fmt); 603c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 604c398eda0STheodore Ts'o function, line); 605ac27a0ecSDave Kleikamp vprintk(fmt, args); 606ac27a0ecSDave Kleikamp printk("\n"); 607ac27a0ecSDave Kleikamp va_end(args); 608ac27a0ecSDave Kleikamp 6091c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 610b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 6114ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 6124418e141SDmitry Monakhov /* 6134418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 6144418e141SDmitry Monakhov * before ->s_flags update 6154418e141SDmitry Monakhov */ 6164418e141SDmitry Monakhov smp_wmb(); 6174418e141SDmitry Monakhov sb->s_flags |= MS_RDONLY; 618ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 619dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 6201c13d5c0STheodore Ts'o save_error_info(sb, function, line); 6211c13d5c0STheodore Ts'o } 6224327ba52SDaeho Jeong if (test_opt(sb, ERRORS_PANIC)) { 6234327ba52SDaeho Jeong if (EXT4_SB(sb)->s_journal && 6244327ba52SDaeho Jeong !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) 6254327ba52SDaeho Jeong return; 6261c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 627ac27a0ecSDave Kleikamp } 6284327ba52SDaeho Jeong } 629ac27a0ecSDave Kleikamp 630e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 631e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 632b31e1552SEric Sandeen { 6330ff2ea7dSJoe Perches struct va_format vaf; 634b31e1552SEric Sandeen va_list args; 635b31e1552SEric Sandeen 636efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) 637efbed4dcSTheodore Ts'o return; 638efbed4dcSTheodore Ts'o 639b31e1552SEric Sandeen va_start(args, fmt); 6400ff2ea7dSJoe Perches vaf.fmt = fmt; 6410ff2ea7dSJoe Perches vaf.va = &args; 6420ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 643b31e1552SEric Sandeen va_end(args); 644b31e1552SEric Sandeen } 645b31e1552SEric Sandeen 646b03a2f7eSAndreas Dilger #define ext4_warning_ratelimit(sb) \ 647b03a2f7eSAndreas Dilger ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), \ 648b03a2f7eSAndreas Dilger "EXT4-fs warning") 649b03a2f7eSAndreas Dilger 65012062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 651c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 652ac27a0ecSDave Kleikamp { 6530ff2ea7dSJoe Perches struct va_format vaf; 654ac27a0ecSDave Kleikamp va_list args; 655ac27a0ecSDave Kleikamp 656b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(sb)) 657efbed4dcSTheodore Ts'o return; 658efbed4dcSTheodore Ts'o 659ac27a0ecSDave Kleikamp va_start(args, fmt); 6600ff2ea7dSJoe Perches vaf.fmt = fmt; 6610ff2ea7dSJoe Perches vaf.va = &args; 6620ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 6630ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 664ac27a0ecSDave Kleikamp va_end(args); 665ac27a0ecSDave Kleikamp } 666ac27a0ecSDave Kleikamp 667b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 668b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...) 669b03a2f7eSAndreas Dilger { 670b03a2f7eSAndreas Dilger struct va_format vaf; 671b03a2f7eSAndreas Dilger va_list args; 672b03a2f7eSAndreas Dilger 673b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(inode->i_sb)) 674b03a2f7eSAndreas Dilger return; 675b03a2f7eSAndreas Dilger 676b03a2f7eSAndreas Dilger va_start(args, fmt); 677b03a2f7eSAndreas Dilger vaf.fmt = fmt; 678b03a2f7eSAndreas Dilger vaf.va = &args; 679b03a2f7eSAndreas Dilger printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " 680b03a2f7eSAndreas Dilger "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, 681b03a2f7eSAndreas Dilger function, line, inode->i_ino, current->comm, &vaf); 682b03a2f7eSAndreas Dilger va_end(args); 683b03a2f7eSAndreas Dilger } 684b03a2f7eSAndreas Dilger 685e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 686e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 687e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 688e29136f8STheodore Ts'o const char *fmt, ...) 6895d1b1b3fSAneesh Kumar K.V __releases(bitlock) 6905d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 6915d1b1b3fSAneesh Kumar K.V { 6920ff2ea7dSJoe Perches struct va_format vaf; 6935d1b1b3fSAneesh Kumar K.V va_list args; 6945d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 6955d1b1b3fSAneesh Kumar K.V 6961c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 6971c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 6981c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 6990ff2ea7dSJoe Perches 700efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 7015d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 7020ff2ea7dSJoe Perches vaf.fmt = fmt; 7030ff2ea7dSJoe Perches vaf.va = &args; 70421149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 705e29136f8STheodore Ts'o sb->s_id, function, line, grp); 706e29136f8STheodore Ts'o if (ino) 7070ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 708e29136f8STheodore Ts'o if (block) 709efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 710efbed4dcSTheodore Ts'o (unsigned long long) block); 7110ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 7125d1b1b3fSAneesh Kumar K.V va_end(args); 713efbed4dcSTheodore Ts'o } 7145d1b1b3fSAneesh Kumar K.V 7155d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 716e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 7175d1b1b3fSAneesh Kumar K.V return; 7185d1b1b3fSAneesh Kumar K.V } 7191c13d5c0STheodore Ts'o 7205d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 7215d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 7225d1b1b3fSAneesh Kumar K.V /* 7235d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 7245d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 7255d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 7265d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 7275d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 72825985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 7295d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 7305d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 7315d1b1b3fSAneesh Kumar K.V * more appropriate error code. 7325d1b1b3fSAneesh Kumar K.V */ 7335d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 7345d1b1b3fSAneesh Kumar K.V return; 7355d1b1b3fSAneesh Kumar K.V } 7365d1b1b3fSAneesh Kumar K.V 737617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 738ac27a0ecSDave Kleikamp { 739617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 740ac27a0ecSDave Kleikamp 741617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 742ac27a0ecSDave Kleikamp return; 743ac27a0ecSDave Kleikamp 74412062dddSEric Sandeen ext4_warning(sb, 745ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 746ac27a0ecSDave Kleikamp "running e2fsck is recommended", 747617ba13bSMingming Cao EXT4_DYNAMIC_REV); 748ac27a0ecSDave Kleikamp 749617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 750617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 751617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 752ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 753ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 754ac27a0ecSDave Kleikamp 755ac27a0ecSDave Kleikamp /* 756ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 757ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 758ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 759ac27a0ecSDave Kleikamp */ 760ac27a0ecSDave Kleikamp } 761ac27a0ecSDave Kleikamp 762ac27a0ecSDave Kleikamp /* 763ac27a0ecSDave Kleikamp * Open the external journal device 764ac27a0ecSDave Kleikamp */ 765b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 766ac27a0ecSDave Kleikamp { 767ac27a0ecSDave Kleikamp struct block_device *bdev; 768ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 769ac27a0ecSDave Kleikamp 770d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 771ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 772ac27a0ecSDave Kleikamp goto fail; 773ac27a0ecSDave Kleikamp return bdev; 774ac27a0ecSDave Kleikamp 775ac27a0ecSDave Kleikamp fail: 776b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 777ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 778ac27a0ecSDave Kleikamp return NULL; 779ac27a0ecSDave Kleikamp } 780ac27a0ecSDave Kleikamp 781ac27a0ecSDave Kleikamp /* 782ac27a0ecSDave Kleikamp * Release the journal device 783ac27a0ecSDave Kleikamp */ 7844385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 785ac27a0ecSDave Kleikamp { 7864385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 787ac27a0ecSDave Kleikamp } 788ac27a0ecSDave Kleikamp 7894385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 790ac27a0ecSDave Kleikamp { 791ac27a0ecSDave Kleikamp struct block_device *bdev; 792ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 793ac27a0ecSDave Kleikamp if (bdev) { 7944385bab1SAl Viro ext4_blkdev_put(bdev); 795ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 796ac27a0ecSDave Kleikamp } 797ac27a0ecSDave Kleikamp } 798ac27a0ecSDave Kleikamp 799ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 800ac27a0ecSDave Kleikamp { 801617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 802ac27a0ecSDave Kleikamp } 803ac27a0ecSDave Kleikamp 804617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 805ac27a0ecSDave Kleikamp { 806ac27a0ecSDave Kleikamp struct list_head *l; 807ac27a0ecSDave Kleikamp 808b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 809ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 810ac27a0ecSDave Kleikamp 811ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 812ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 813ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 814ac27a0ecSDave Kleikamp printk(KERN_ERR " " 815ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 816ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 817ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 818ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 819ac27a0ecSDave Kleikamp } 820ac27a0ecSDave Kleikamp } 821ac27a0ecSDave Kleikamp 822617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 823ac27a0ecSDave Kleikamp { 824617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 825617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 826ef2cabf7SHidehiro Kawai int i, err; 827ac27a0ecSDave Kleikamp 828857ac889SLukas Czerner ext4_unregister_li_request(sb); 829e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 830e0ccfd95SChristoph Hellwig 8312e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 8322e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 8334c0425ffSMingming Cao 8340390131bSFrank Mayhar if (sbi->s_journal) { 835ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 83647b4a50bSJan Kara sbi->s_journal = NULL; 837ef2cabf7SHidehiro Kawai if (err < 0) 838c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 8390390131bSFrank Mayhar } 840d4edac31SJosef Bacik 841ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 842d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 8439105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 844d4edac31SJosef Bacik ext4_release_system_zone(sb); 845d4edac31SJosef Bacik ext4_mb_release(sb); 846d4edac31SJosef Bacik ext4_ext_release(sb); 847d4edac31SJosef Bacik ext4_xattr_put_super(sb); 848d4edac31SJosef Bacik 849ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 850e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 851ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 852ac27a0ecSDave Kleikamp } 85358c5873aSArtem Bityutskiy if (!(sb->s_flags & MS_RDONLY)) 854a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 855a8e25a83SArtem Bityutskiy 856ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 857ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 858b93b41d4SAl Viro kvfree(sbi->s_group_desc); 859b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 86057042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 861ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 862ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 86357042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 864ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 865ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 866a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 867ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 868ac27a0ecSDave Kleikamp #endif 869ac27a0ecSDave Kleikamp 870ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 871ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 872ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 873ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 874ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 875ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 876ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 877ac27a0ecSDave Kleikamp 87889d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 879f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 880ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 881ac27a0ecSDave Kleikamp /* 882ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 883ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 884ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 885ac27a0ecSDave Kleikamp */ 886ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 887f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 888617ba13bSMingming Cao ext4_blkdev_remove(sbi); 889ac27a0ecSDave Kleikamp } 8909c191f70ST Makphaibulchoke if (sbi->s_mb_cache) { 8919c191f70ST Makphaibulchoke ext4_xattr_destroy_cache(sbi->s_mb_cache); 8929c191f70ST Makphaibulchoke sbi->s_mb_cache = NULL; 8939c191f70ST Makphaibulchoke } 894c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 895c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 896ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 8973197ebdbSTheodore Ts'o /* 8983197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 8993197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 9003197ebdbSTheodore Ts'o */ 9013197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 9023197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 9030441984aSDarrick J. Wong if (sbi->s_chksum_driver) 9040441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 905705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 906ac27a0ecSDave Kleikamp kfree(sbi); 907ac27a0ecSDave Kleikamp } 908ac27a0ecSDave Kleikamp 909e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 910ac27a0ecSDave Kleikamp 911ac27a0ecSDave Kleikamp /* 912ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 913ac27a0ecSDave Kleikamp */ 914617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 915ac27a0ecSDave Kleikamp { 916617ba13bSMingming Cao struct ext4_inode_info *ei; 917ac27a0ecSDave Kleikamp 918e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 919ac27a0ecSDave Kleikamp if (!ei) 920ac27a0ecSDave Kleikamp return NULL; 9210b8e58a1SAndreas Dilger 922ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 923202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 924c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 925c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 9269a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 9279a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 928edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 929eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 930edaa53caSZheng Liu ei->i_es_shk_nr = 0; 931dd475925SJan Kara ei->i_es_shrink_lblk = 0; 932d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 933d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 934d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 9359d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 9367e731bc9STheodore Ts'o ei->i_da_metadata_calc_last_lblock = 0; 937d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 938a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 939a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 94096c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 941a9e7f447SDmitry Monakhov #endif 9428aefcd55STheodore Ts'o ei->jinode = NULL; 9432e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 944744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 945b436b9beSJan Kara ei->i_sync_tid = 0; 946b436b9beSJan Kara ei->i_datasync_tid = 0; 947f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 948e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 9492e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 950b30ab0e0SMichael Halcrow #ifdef CONFIG_EXT4_FS_ENCRYPTION 951b7236e21STheodore Ts'o ei->i_crypt_info = NULL; 952b30ab0e0SMichael Halcrow #endif 953ac27a0ecSDave Kleikamp return &ei->vfs_inode; 954ac27a0ecSDave Kleikamp } 955ac27a0ecSDave Kleikamp 9567ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 9577ff9c073STheodore Ts'o { 9587ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 9597ff9c073STheodore Ts'o 9607ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 9617ff9c073STheodore Ts'o return drop; 9627ff9c073STheodore Ts'o } 9637ff9c073STheodore Ts'o 964fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 965fa0d7e3dSNick Piggin { 966fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 967fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 968fa0d7e3dSNick Piggin } 969fa0d7e3dSNick Piggin 970617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 971ac27a0ecSDave Kleikamp { 9729f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 973b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 974b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 975b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 9769f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 9779f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 9789f7dd93dSVasily Averin true); 9799f7dd93dSVasily Averin dump_stack(); 9809f7dd93dSVasily Averin } 981fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 982ac27a0ecSDave Kleikamp } 983ac27a0ecSDave Kleikamp 98451cc5068SAlexey Dobriyan static void init_once(void *foo) 985ac27a0ecSDave Kleikamp { 986617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 987ac27a0ecSDave Kleikamp 988ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 989ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 9900e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 991ea3d7209SJan Kara init_rwsem(&ei->i_mmap_sem); 992ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 993ac27a0ecSDave Kleikamp } 994ac27a0ecSDave Kleikamp 995e67bc2b3SFabian Frederick static int __init init_inodecache(void) 996ac27a0ecSDave Kleikamp { 997617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 998617ba13bSMingming Cao sizeof(struct ext4_inode_info), 999ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 1000ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 100120c2df83SPaul Mundt init_once); 1002617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1003ac27a0ecSDave Kleikamp return -ENOMEM; 1004ac27a0ecSDave Kleikamp return 0; 1005ac27a0ecSDave Kleikamp } 1006ac27a0ecSDave Kleikamp 1007ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1008ac27a0ecSDave Kleikamp { 10098c0a8537SKirill A. Shutemov /* 10108c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 10118c0a8537SKirill A. Shutemov * destroy cache. 10128c0a8537SKirill A. Shutemov */ 10138c0a8537SKirill A. Shutemov rcu_barrier(); 1014617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1015ac27a0ecSDave Kleikamp } 1016ac27a0ecSDave Kleikamp 10170930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1018ac27a0ecSDave Kleikamp { 10190930fcc1SAl Viro invalidate_inode_buffers(inode); 1020dbd5768fSJan Kara clear_inode(inode); 10219f754758SChristoph Hellwig dquot_drop(inode); 1022c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 102351865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 10248aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 10258aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 10268aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 10278aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 10288aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 10298aefcd55STheodore Ts'o } 1030b7236e21STheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 1031b7236e21STheodore Ts'o if (EXT4_I(inode)->i_crypt_info) 1032c936e1ecSTheodore Ts'o ext4_free_encryption_info(inode, EXT4_I(inode)->i_crypt_info); 1033b7236e21STheodore Ts'o #endif 1034ac27a0ecSDave Kleikamp } 1035ac27a0ecSDave Kleikamp 10361b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 10371b961ac0SChristoph Hellwig u64 ino, u32 generation) 1038ac27a0ecSDave Kleikamp { 1039ac27a0ecSDave Kleikamp struct inode *inode; 1040ac27a0ecSDave Kleikamp 1041617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1042ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1043617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1044ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1045ac27a0ecSDave Kleikamp 1046ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1047ac27a0ecSDave Kleikamp * 1048617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1049ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1050ac27a0ecSDave Kleikamp * 1051ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1052ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1053ac27a0ecSDave Kleikamp */ 1054f4bb2981STheodore Ts'o inode = ext4_iget_normal(sb, ino); 10551d1fe1eeSDavid Howells if (IS_ERR(inode)) 10561d1fe1eeSDavid Howells return ERR_CAST(inode); 10571d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1058ac27a0ecSDave Kleikamp iput(inode); 1059ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1060ac27a0ecSDave Kleikamp } 10611b961ac0SChristoph Hellwig 10621b961ac0SChristoph Hellwig return inode; 1063ac27a0ecSDave Kleikamp } 10641b961ac0SChristoph Hellwig 10651b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 10661b961ac0SChristoph Hellwig int fh_len, int fh_type) 10671b961ac0SChristoph Hellwig { 10681b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 10691b961ac0SChristoph Hellwig ext4_nfs_get_inode); 10701b961ac0SChristoph Hellwig } 10711b961ac0SChristoph Hellwig 10721b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 10731b961ac0SChristoph Hellwig int fh_len, int fh_type) 10741b961ac0SChristoph Hellwig { 10751b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 10761b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1077ac27a0ecSDave Kleikamp } 1078ac27a0ecSDave Kleikamp 1079c39a7f84SToshiyuki Okajima /* 1080c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1081c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1082c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1083c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1084c39a7f84SToshiyuki Okajima */ 10850b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 10860b8e58a1SAndreas Dilger gfp_t wait) 1087c39a7f84SToshiyuki Okajima { 1088c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1089c39a7f84SToshiyuki Okajima 1090c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1091c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1092c39a7f84SToshiyuki Okajima return 0; 1093c39a7f84SToshiyuki Okajima if (journal) 1094c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1095d0164adcSMel Gorman wait & ~__GFP_DIRECT_RECLAIM); 1096c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1097c39a7f84SToshiyuki Okajima } 1098c39a7f84SToshiyuki Okajima 1099ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1100ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1101ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1102ac27a0ecSDave Kleikamp 1103617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1104617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1105617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1106617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1107617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 11086f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1109f00c9e44SJan Kara struct path *path); 1110ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 1111617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1112617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1113ac27a0ecSDave Kleikamp size_t len, loff_t off); 1114617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1115ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 11167c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 11177c319d32SAditya Kali unsigned int flags); 11187c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 1119ac27a0ecSDave Kleikamp 112096c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 112196c7e0d9SJan Kara { 112296c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 112396c7e0d9SJan Kara } 112496c7e0d9SJan Kara 112561e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 112660e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1127617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1128617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1129617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1130617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1131a5b5ee32SJan Kara .write_info = ext4_write_info, 1132a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1133a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1134*040cb378SLi Xi .get_projid = ext4_get_projid, 1135ac27a0ecSDave Kleikamp }; 1136ac27a0ecSDave Kleikamp 11370d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1138617ba13bSMingming Cao .quota_on = ext4_quota_on, 1139ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1140287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 11410a240339SJan Kara .get_state = dquot_get_state, 1142287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1143287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1144287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1145ac27a0ecSDave Kleikamp }; 1146ac27a0ecSDave Kleikamp #endif 1147ac27a0ecSDave Kleikamp 1148ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1149617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1150617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1151617ba13bSMingming Cao .write_inode = ext4_write_inode, 1152617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 11537ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 11540930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1155617ba13bSMingming Cao .put_super = ext4_put_super, 1156617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1157c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1158c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1159617ba13bSMingming Cao .statfs = ext4_statfs, 1160617ba13bSMingming Cao .remount_fs = ext4_remount, 1161617ba13bSMingming Cao .show_options = ext4_show_options, 1162ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1163617ba13bSMingming Cao .quota_read = ext4_quota_read, 1164617ba13bSMingming Cao .quota_write = ext4_quota_write, 116596c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1166ac27a0ecSDave Kleikamp #endif 1167c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1168ac27a0ecSDave Kleikamp }; 1169ac27a0ecSDave Kleikamp 117039655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 11711b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 11721b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1173617ba13bSMingming Cao .get_parent = ext4_get_parent, 1174ac27a0ecSDave Kleikamp }; 1175ac27a0ecSDave Kleikamp 1176ac27a0ecSDave Kleikamp enum { 1177ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1178ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 117972578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1180ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 118172578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1182ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1183ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1184ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 11856ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 1186ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 11875a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1188ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 1189923ae0ffSRoss Zwisler Opt_usrquota, Opt_grpquota, Opt_i_version, Opt_dax, 11901449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 1191a26f4992STheodore Ts'o Opt_lazytime, Opt_nolazytime, 11921449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 11935328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1194744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1195fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1196c6d3d56dSDarrick J. Wong Opt_max_dir_size_kb, Opt_nojournal_checksum, 1197ac27a0ecSDave Kleikamp }; 1198ac27a0ecSDave Kleikamp 1199a447c093SSteven Whitehouse static const match_table_t tokens = { 1200ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1201ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1202ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1203ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1204ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1205ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1206ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1207ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1208ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1209ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1210ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1211ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1212ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1213ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 121472578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 121572578c33STheodore Ts'o {Opt_removed, "orlov"}, 1216ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1217ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1218ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1219ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1220e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 12215a916be1STheodore Ts'o {Opt_noload, "noload"}, 122272578c33STheodore Ts'o {Opt_removed, "nobh"}, 122372578c33STheodore Ts'o {Opt_removed, "bh"}, 1224ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 122530773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 122630773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1227ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1228ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1229818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1230c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, "nojournal_checksum"}, 1231818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1232ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1233ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1234ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1235ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 12365bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 12375bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1238ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1239ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1240ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1241ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1242ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1243ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 12445a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1245ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1246ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1247ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1248ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1249ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 125006705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 125106705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 125225ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1253923ae0ffSRoss Zwisler {Opt_dax, "dax"}, 1254c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 125564769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1256a26f4992STheodore Ts'o {Opt_lazytime, "lazytime"}, 1257a26f4992STheodore Ts'o {Opt_nolazytime, "nolazytime"}, 1258dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 125936ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 126036ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 12616fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 12626fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1263240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1264b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1265afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 126606705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 126706705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1268744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1269744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 12705328e635SEric Sandeen {Opt_discard, "discard"}, 12715328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1272fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1273fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1274fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1275df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 12766ddb2447STheodore Ts'o {Opt_test_dummy_encryption, "test_dummy_encryption"}, 1277c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1278c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1279c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1280c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1281c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1282f3f12faaSJosef Bacik {Opt_err, NULL}, 1283ac27a0ecSDave Kleikamp }; 1284ac27a0ecSDave Kleikamp 1285617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1286ac27a0ecSDave Kleikamp { 1287617ba13bSMingming Cao ext4_fsblk_t sb_block; 1288ac27a0ecSDave Kleikamp char *options = (char *) *data; 1289ac27a0ecSDave Kleikamp 1290ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1291ac27a0ecSDave Kleikamp return 1; /* Default location */ 12920b8e58a1SAndreas Dilger 1293ac27a0ecSDave Kleikamp options += 3; 12940b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1295ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1296ac27a0ecSDave Kleikamp if (*options && *options != ',') { 12974776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1298ac27a0ecSDave Kleikamp (char *) *data); 1299ac27a0ecSDave Kleikamp return 1; 1300ac27a0ecSDave Kleikamp } 1301ac27a0ecSDave Kleikamp if (*options == ',') 1302ac27a0ecSDave Kleikamp options++; 1303ac27a0ecSDave Kleikamp *data = (void *) options; 13040b8e58a1SAndreas Dilger 1305ac27a0ecSDave Kleikamp return sb_block; 1306ac27a0ecSDave Kleikamp } 1307ac27a0ecSDave Kleikamp 1308b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1309437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1310437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1311b3881f74STheodore Ts'o 131256c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 131356c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 131456c50f11SDmitry Monakhov { 131556c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 131656c50f11SDmitry Monakhov char *qname; 131703dafb5fSChen Gang int ret = -1; 131856c50f11SDmitry Monakhov 131956c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 132056c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 132156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 132256c50f11SDmitry Monakhov "Cannot change journaled " 132356c50f11SDmitry Monakhov "quota options when quota turned on"); 132457f73c2cSTheodore Ts'o return -1; 132556c50f11SDmitry Monakhov } 1326e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1327262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set journaled quota options " 1328262b4662SJan Kara "when QUOTA feature is enabled"); 1329262b4662SJan Kara return -1; 1330262b4662SJan Kara } 133156c50f11SDmitry Monakhov qname = match_strdup(args); 133256c50f11SDmitry Monakhov if (!qname) { 133356c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 133456c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 133557f73c2cSTheodore Ts'o return -1; 133656c50f11SDmitry Monakhov } 133703dafb5fSChen Gang if (sbi->s_qf_names[qtype]) { 133803dafb5fSChen Gang if (strcmp(sbi->s_qf_names[qtype], qname) == 0) 133903dafb5fSChen Gang ret = 1; 134003dafb5fSChen Gang else 134156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 134203dafb5fSChen Gang "%s quota file already specified", 134303dafb5fSChen Gang QTYPE2NAME(qtype)); 134403dafb5fSChen Gang goto errout; 134556c50f11SDmitry Monakhov } 134603dafb5fSChen Gang if (strchr(qname, '/')) { 134756c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 134856c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 134903dafb5fSChen Gang goto errout; 135056c50f11SDmitry Monakhov } 135103dafb5fSChen Gang sbi->s_qf_names[qtype] = qname; 1352fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 135356c50f11SDmitry Monakhov return 1; 135403dafb5fSChen Gang errout: 135503dafb5fSChen Gang kfree(qname); 135603dafb5fSChen Gang return ret; 135756c50f11SDmitry Monakhov } 135856c50f11SDmitry Monakhov 135956c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 136056c50f11SDmitry Monakhov { 136156c50f11SDmitry Monakhov 136256c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 136356c50f11SDmitry Monakhov 136456c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 136556c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 136656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 136756c50f11SDmitry Monakhov " when quota turned on"); 136857f73c2cSTheodore Ts'o return -1; 136956c50f11SDmitry Monakhov } 137003dafb5fSChen Gang kfree(sbi->s_qf_names[qtype]); 137156c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 137256c50f11SDmitry Monakhov return 1; 137356c50f11SDmitry Monakhov } 137456c50f11SDmitry Monakhov #endif 137556c50f11SDmitry Monakhov 137626092bf5STheodore Ts'o #define MOPT_SET 0x0001 137726092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 137826092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 137926092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 138026092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 138126092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 138226092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 138326092bf5STheodore Ts'o #define MOPT_Q 0 138426092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 138526092bf5STheodore Ts'o #else 138626092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 138726092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 138826092bf5STheodore Ts'o #endif 138926092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 13908dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 13918dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 13928dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1393ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 139426092bf5STheodore Ts'o 139526092bf5STheodore Ts'o static const struct mount_opts { 139626092bf5STheodore Ts'o int token; 139726092bf5STheodore Ts'o int mount_opt; 139826092bf5STheodore Ts'o int flags; 139926092bf5STheodore Ts'o } ext4_mount_opts[] = { 140026092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 140126092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 140226092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 140326092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 140426092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 140526092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 14068dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 14078dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 14088dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 14098dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 141026092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 141126092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 14128dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 14138dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 14148dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 141559d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1416c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1417c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 14188dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 14191e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 142026092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 14218dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 14221e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 14238dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 142426092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 142526092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 142626092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 14278dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 14288dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_SET}, 14298dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 14308dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_CLEAR}, 143126092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 143226092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 143326092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 143426092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 143526092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 143626092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 143726092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 143826092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 143926092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 144026092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 1441923ae0ffSRoss Zwisler {Opt_dax, EXT4_MOUNT_DAX, MOPT_SET}, 144226092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 14430efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 14440efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 14455ba92bcfSCarlos Maiolino {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 14465ba92bcfSCarlos Maiolino {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, 14475ba92bcfSCarlos Maiolino {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 14488dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 14498dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 14508dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 14518dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 145226092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 145326092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 145426092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 145526092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 145626092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 145726092bf5STheodore Ts'o #else 145826092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 145926092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 146026092bf5STheodore Ts'o #endif 146126092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 146226092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 146326092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 146426092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 146526092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 146626092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 146726092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 146826092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 146926092bf5STheodore Ts'o EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, 147026092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 147126092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 147226092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 147326092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 147426092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 147526092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 147626092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1477df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 14786ddb2447STheodore Ts'o {Opt_test_dummy_encryption, 0, MOPT_GTE0}, 147926092bf5STheodore Ts'o {Opt_err, 0, 0} 148026092bf5STheodore Ts'o }; 148126092bf5STheodore Ts'o 148226092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 148326092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 148426092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 148526092bf5STheodore Ts'o { 148626092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 148726092bf5STheodore Ts'o const struct mount_opts *m; 148808cefc7aSEric W. Biederman kuid_t uid; 148908cefc7aSEric W. Biederman kgid_t gid; 149026092bf5STheodore Ts'o int arg = 0; 149126092bf5STheodore Ts'o 149257f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 149357f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 149457f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 149557f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 149657f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 149757f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 149857f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 149957f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 150057f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 150157f73c2cSTheodore Ts'o #endif 150226092bf5STheodore Ts'o switch (token) { 1503f7048605STheodore Ts'o case Opt_noacl: 1504f7048605STheodore Ts'o case Opt_nouser_xattr: 1505f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1506f7048605STheodore Ts'o break; 150726092bf5STheodore Ts'o case Opt_sb: 150826092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 150926092bf5STheodore Ts'o case Opt_removed: 15105f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 151126092bf5STheodore Ts'o return 1; 151226092bf5STheodore Ts'o case Opt_abort: 151326092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 151426092bf5STheodore Ts'o return 1; 151526092bf5STheodore Ts'o case Opt_i_version: 151626092bf5STheodore Ts'o sb->s_flags |= MS_I_VERSION; 151726092bf5STheodore Ts'o return 1; 1518a26f4992STheodore Ts'o case Opt_lazytime: 1519a26f4992STheodore Ts'o sb->s_flags |= MS_LAZYTIME; 1520a26f4992STheodore Ts'o return 1; 1521a26f4992STheodore Ts'o case Opt_nolazytime: 1522a26f4992STheodore Ts'o sb->s_flags &= ~MS_LAZYTIME; 1523a26f4992STheodore Ts'o return 1; 152426092bf5STheodore Ts'o } 152526092bf5STheodore Ts'o 15265f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 15275f3633e3SJan Kara if (token == m->token) 15285f3633e3SJan Kara break; 15295f3633e3SJan Kara 15305f3633e3SJan Kara if (m->token == Opt_err) { 15315f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 15325f3633e3SJan Kara "or missing value", opt); 15335f3633e3SJan Kara return -1; 15345f3633e3SJan Kara } 15355f3633e3SJan Kara 15368dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 15378dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 15388dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 15398dc0aa8cSTheodore Ts'o return -1; 15408dc0aa8cSTheodore Ts'o } 15418dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 15428dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 15438dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 15448dc0aa8cSTheodore Ts'o return -1; 15458dc0aa8cSTheodore Ts'o } 15468dc0aa8cSTheodore Ts'o 1547ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 15480efb3b23SJan Kara return -1; 154926092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 155026092bf5STheodore Ts'o return -1; 1551c93cf2d7SDmitry Monakhov if (m->flags & MOPT_EXPLICIT) { 1552c93cf2d7SDmitry Monakhov if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 155326092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 15541e381f60SDmitry Monakhov } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 15551e381f60SDmitry Monakhov set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM); 1556c93cf2d7SDmitry Monakhov } else 1557c93cf2d7SDmitry Monakhov return -1; 1558c93cf2d7SDmitry Monakhov } 155926092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 156026092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 156126092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 156226092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 156326092bf5STheodore Ts'o "options when quota turned on"); 156426092bf5STheodore Ts'o return -1; 156526092bf5STheodore Ts'o } 156626092bf5STheodore Ts'o 156726092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 156826092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 156926092bf5STheodore Ts'o } else if (token == Opt_commit) { 157026092bf5STheodore Ts'o if (arg == 0) 157126092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 157226092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 157326092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 157426092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 157526092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 157626092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 157726092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1578e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1579e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1580e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1581e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 158226092bf5STheodore Ts'o return -1; 158326092bf5STheodore Ts'o } 158426092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 158526092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 158626092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 158726092bf5STheodore Ts'o if (!args->from) 158826092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 158926092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1590df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1591df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 159226092bf5STheodore Ts'o } else if (token == Opt_stripe) { 159326092bf5STheodore Ts'o sbi->s_stripe = arg; 15940efb3b23SJan Kara } else if (token == Opt_resuid) { 15950efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 15960efb3b23SJan Kara if (!uid_valid(uid)) { 15975f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 15980efb3b23SJan Kara return -1; 15990efb3b23SJan Kara } 16000efb3b23SJan Kara sbi->s_resuid = uid; 16010efb3b23SJan Kara } else if (token == Opt_resgid) { 16020efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 16030efb3b23SJan Kara if (!gid_valid(gid)) { 16045f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 16050efb3b23SJan Kara return -1; 16060efb3b23SJan Kara } 16070efb3b23SJan Kara sbi->s_resgid = gid; 16080efb3b23SJan Kara } else if (token == Opt_journal_dev) { 16090efb3b23SJan Kara if (is_remount) { 16100efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 16110efb3b23SJan Kara "Cannot specify journal on remount"); 16120efb3b23SJan Kara return -1; 16130efb3b23SJan Kara } 16140efb3b23SJan Kara *journal_devnum = arg; 1615ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 1616ad4eec61SEric Sandeen char *journal_path; 1617ad4eec61SEric Sandeen struct inode *journal_inode; 1618ad4eec61SEric Sandeen struct path path; 1619ad4eec61SEric Sandeen int error; 1620ad4eec61SEric Sandeen 1621ad4eec61SEric Sandeen if (is_remount) { 1622ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 1623ad4eec61SEric Sandeen "Cannot specify journal on remount"); 1624ad4eec61SEric Sandeen return -1; 1625ad4eec61SEric Sandeen } 1626ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 1627ad4eec61SEric Sandeen if (!journal_path) { 1628ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 1629ad4eec61SEric Sandeen "journal device string"); 1630ad4eec61SEric Sandeen return -1; 1631ad4eec61SEric Sandeen } 1632ad4eec61SEric Sandeen 1633ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 1634ad4eec61SEric Sandeen if (error) { 1635ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 1636ad4eec61SEric Sandeen "journal device path: error %d", error); 1637ad4eec61SEric Sandeen kfree(journal_path); 1638ad4eec61SEric Sandeen return -1; 1639ad4eec61SEric Sandeen } 1640ad4eec61SEric Sandeen 16412b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 1642ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 1643ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 1644ad4eec61SEric Sandeen "is not a block device", journal_path); 1645ad4eec61SEric Sandeen path_put(&path); 1646ad4eec61SEric Sandeen kfree(journal_path); 1647ad4eec61SEric Sandeen return -1; 1648ad4eec61SEric Sandeen } 1649ad4eec61SEric Sandeen 1650ad4eec61SEric Sandeen *journal_devnum = new_encode_dev(journal_inode->i_rdev); 1651ad4eec61SEric Sandeen path_put(&path); 1652ad4eec61SEric Sandeen kfree(journal_path); 16530efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 16540efb3b23SJan Kara if (arg > 7) { 16555f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 16560efb3b23SJan Kara " (must be 0-7)"); 16570efb3b23SJan Kara return -1; 16580efb3b23SJan Kara } 16590efb3b23SJan Kara *journal_ioprio = 16600efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 16616ddb2447STheodore Ts'o } else if (token == Opt_test_dummy_encryption) { 16626ddb2447STheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 16636ddb2447STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION; 16646ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 16656ddb2447STheodore Ts'o "Test dummy encryption mode enabled"); 16666ddb2447STheodore Ts'o #else 16676ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 16686ddb2447STheodore Ts'o "Test dummy encryption mount option ignored"); 16696ddb2447STheodore Ts'o #endif 167026092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 167126092bf5STheodore Ts'o if (is_remount) { 167226092bf5STheodore Ts'o if (!sbi->s_journal) 167326092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 16745f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 167526092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 167626092bf5STheodore Ts'o "Cannot change data mode on remount"); 167726092bf5STheodore Ts'o return -1; 167826092bf5STheodore Ts'o } 167926092bf5STheodore Ts'o } else { 168026092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 168126092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 168226092bf5STheodore Ts'o } 168326092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 168426092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 168526092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 168626092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 16875f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 16885f3633e3SJan Kara "quota options when quota turned on"); 168926092bf5STheodore Ts'o return -1; 169026092bf5STheodore Ts'o } 1691e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1692262b4662SJan Kara ext4_msg(sb, KERN_ERR, 1693262b4662SJan Kara "Cannot set journaled quota options " 1694262b4662SJan Kara "when QUOTA feature is enabled"); 1695262b4662SJan Kara return -1; 1696262b4662SJan Kara } 169726092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 169826092bf5STheodore Ts'o #endif 1699923ae0ffSRoss Zwisler } else if (token == Opt_dax) { 1700ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 1701ef83b6e8SDan Williams ext4_msg(sb, KERN_WARNING, 1702ef83b6e8SDan Williams "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); 1703ef83b6e8SDan Williams sbi->s_mount_opt |= m->mount_opt; 1704ef83b6e8SDan Williams #else 1705923ae0ffSRoss Zwisler ext4_msg(sb, KERN_INFO, "dax option not supported"); 1706923ae0ffSRoss Zwisler return -1; 1707923ae0ffSRoss Zwisler #endif 170826092bf5STheodore Ts'o } else { 170926092bf5STheodore Ts'o if (!args->from) 171026092bf5STheodore Ts'o arg = 1; 171126092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 171226092bf5STheodore Ts'o arg = !arg; 171326092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 171426092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 171526092bf5STheodore Ts'o "buggy handling of option %s", opt); 171626092bf5STheodore Ts'o WARN_ON(1); 171726092bf5STheodore Ts'o return -1; 171826092bf5STheodore Ts'o } 171926092bf5STheodore Ts'o if (arg != 0) 172026092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 172126092bf5STheodore Ts'o else 172226092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 172326092bf5STheodore Ts'o } 172426092bf5STheodore Ts'o return 1; 172526092bf5STheodore Ts'o } 172626092bf5STheodore Ts'o 1727ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1728c3191067STheodore Ts'o unsigned long *journal_devnum, 1729b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1730661aa520SEric Sandeen int is_remount) 1731ac27a0ecSDave Kleikamp { 1732617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1733ac27a0ecSDave Kleikamp char *p; 1734ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 173526092bf5STheodore Ts'o int token; 1736ac27a0ecSDave Kleikamp 1737ac27a0ecSDave Kleikamp if (!options) 1738ac27a0ecSDave Kleikamp return 1; 1739ac27a0ecSDave Kleikamp 1740ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1741ac27a0ecSDave Kleikamp if (!*p) 1742ac27a0ecSDave Kleikamp continue; 174315121c18SEric Sandeen /* 174415121c18SEric Sandeen * Initialize args struct so we know whether arg was 174515121c18SEric Sandeen * found; some options take optional arguments. 174615121c18SEric Sandeen */ 1747caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 1748ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 174926092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 175026092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1751ac27a0ecSDave Kleikamp return 0; 1752ac27a0ecSDave Kleikamp } 1753ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1754e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) && 1755262b4662SJan Kara (test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) { 1756262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set quota options when QUOTA " 1757262b4662SJan Kara "feature is enabled"); 1758262b4662SJan Kara return 0; 1759262b4662SJan Kara } 1760ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1761482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1762fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1763ac27a0ecSDave Kleikamp 1764482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1765fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1766ac27a0ecSDave Kleikamp 176756c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1768b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1769b31e1552SEric Sandeen "format mixing"); 1770ac27a0ecSDave Kleikamp return 0; 1771ac27a0ecSDave Kleikamp } 1772ac27a0ecSDave Kleikamp 1773ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1774b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1775b31e1552SEric Sandeen "not specified"); 1776ac27a0ecSDave Kleikamp return 0; 1777ac27a0ecSDave Kleikamp } 1778ac27a0ecSDave Kleikamp } 1779ac27a0ecSDave Kleikamp #endif 1780261cb20cSJan Kara if (test_opt(sb, DIOREAD_NOLOCK)) { 1781261cb20cSJan Kara int blocksize = 1782261cb20cSJan Kara BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 1783261cb20cSJan Kara 1784261cb20cSJan Kara if (blocksize < PAGE_CACHE_SIZE) { 1785261cb20cSJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 1786261cb20cSJan Kara "dioread_nolock if block size != PAGE_SIZE"); 1787261cb20cSJan Kara return 0; 1788261cb20cSJan Kara } 1789261cb20cSJan Kara } 1790d4f76107SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 1791d4f76107SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 1792d4f76107SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with journal_async_commit " 1793d4f76107SJan Kara "in data=ordered mode"); 1794d4f76107SJan Kara return 0; 1795d4f76107SJan Kara } 1796ac27a0ecSDave Kleikamp return 1; 1797ac27a0ecSDave Kleikamp } 1798ac27a0ecSDave Kleikamp 17992adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 18002adf6da8STheodore Ts'o struct super_block *sb) 18012adf6da8STheodore Ts'o { 18022adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 18032adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 18042adf6da8STheodore Ts'o 18052adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 18062adf6da8STheodore Ts'o char *fmtname = ""; 18072adf6da8STheodore Ts'o 18082adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 18092adf6da8STheodore Ts'o case QFMT_VFS_OLD: 18102adf6da8STheodore Ts'o fmtname = "vfsold"; 18112adf6da8STheodore Ts'o break; 18122adf6da8STheodore Ts'o case QFMT_VFS_V0: 18132adf6da8STheodore Ts'o fmtname = "vfsv0"; 18142adf6da8STheodore Ts'o break; 18152adf6da8STheodore Ts'o case QFMT_VFS_V1: 18162adf6da8STheodore Ts'o fmtname = "vfsv1"; 18172adf6da8STheodore Ts'o break; 18182adf6da8STheodore Ts'o } 18192adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 18202adf6da8STheodore Ts'o } 18212adf6da8STheodore Ts'o 18222adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 1823a068acf2SKees Cook seq_show_option(seq, "usrjquota", sbi->s_qf_names[USRQUOTA]); 18242adf6da8STheodore Ts'o 18252adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 1826a068acf2SKees Cook seq_show_option(seq, "grpjquota", sbi->s_qf_names[GRPQUOTA]); 18272adf6da8STheodore Ts'o #endif 18282adf6da8STheodore Ts'o } 18292adf6da8STheodore Ts'o 18305a916be1STheodore Ts'o static const char *token2str(int token) 18315a916be1STheodore Ts'o { 183250df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 18335a916be1STheodore Ts'o 18345a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 18355a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 18365a916be1STheodore Ts'o break; 18375a916be1STheodore Ts'o return t->pattern; 18385a916be1STheodore Ts'o } 18395a916be1STheodore Ts'o 18402adf6da8STheodore Ts'o /* 18412adf6da8STheodore Ts'o * Show an option if 18422adf6da8STheodore Ts'o * - it's set to a non-default value OR 18432adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 18442adf6da8STheodore Ts'o */ 184566acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 184666acdcf4STheodore Ts'o int nodefs) 18472adf6da8STheodore Ts'o { 18482adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 18492adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 185066acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 18515a916be1STheodore Ts'o const struct mount_opts *m; 185266acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 18532adf6da8STheodore Ts'o 185466acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 185566acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 18562adf6da8STheodore Ts'o 18572adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 18585a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 18595a916be1STheodore Ts'o 18605a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 18615a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 18625a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 18635a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 18645a916be1STheodore Ts'o continue; 186566acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 18665a916be1STheodore Ts'o continue; /* skip if same as the default */ 18675a916be1STheodore Ts'o if ((want_set && 18685a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 18695a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 18705a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 18715a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 18725a916be1STheodore Ts'o } 18735a916be1STheodore Ts'o 187408cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 18755a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 187608cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 187708cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 187808cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 18795a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 188008cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 188108cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 188266acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 18835a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 18845a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 18852adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 18865a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 18872adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 18885a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 188966acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 18905a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 189166acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 18925a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 189366acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 18945a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 18952adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 18965a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 189766acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 18985a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 189966acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 19002adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 19015a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 19022adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 19035a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 19042adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 19055a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 19065a916be1STheodore Ts'o } 190766acdcf4STheodore Ts'o if (nodefs || 190866acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 19095a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 19102adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 19112adf6da8STheodore Ts'o 191266acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 191366acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 19145a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 1915df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 1916df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 19172adf6da8STheodore Ts'o 19182adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 19192adf6da8STheodore Ts'o return 0; 19202adf6da8STheodore Ts'o } 19212adf6da8STheodore Ts'o 192266acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 192366acdcf4STheodore Ts'o { 192466acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 192566acdcf4STheodore Ts'o } 192666acdcf4STheodore Ts'o 1927ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 192866acdcf4STheodore Ts'o { 192966acdcf4STheodore Ts'o struct super_block *sb = seq->private; 193066acdcf4STheodore Ts'o int rc; 193166acdcf4STheodore Ts'o 193266acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 193366acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 193466acdcf4STheodore Ts'o seq_puts(seq, "\n"); 193566acdcf4STheodore Ts'o return rc; 193666acdcf4STheodore Ts'o } 193766acdcf4STheodore Ts'o 1938617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1939ac27a0ecSDave Kleikamp int read_only) 1940ac27a0ecSDave Kleikamp { 1941617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1942ac27a0ecSDave Kleikamp int res = 0; 1943ac27a0ecSDave Kleikamp 1944617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1945b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1946b31e1552SEric Sandeen "forcing read-only mode"); 1947ac27a0ecSDave Kleikamp res = MS_RDONLY; 1948ac27a0ecSDave Kleikamp } 1949ac27a0ecSDave Kleikamp if (read_only) 1950281b5995STheodore Ts'o goto done; 1951617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1952b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1953b31e1552SEric Sandeen "running e2fsck is recommended"); 1954c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 1955b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1956b31e1552SEric Sandeen "warning: mounting fs with errors, " 1957b31e1552SEric Sandeen "running e2fsck is recommended"); 1958ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 1959ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1960ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1961b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1962b31e1552SEric Sandeen "warning: maximal mount count reached, " 1963b31e1552SEric Sandeen "running e2fsck is recommended"); 1964ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1965ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1966ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1967b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1968b31e1552SEric Sandeen "warning: checktime reached, " 1969b31e1552SEric Sandeen "running e2fsck is recommended"); 19700390131bSFrank Mayhar if (!sbi->s_journal) 1971216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1972ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1973617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1974e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1975ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1976617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 19770390131bSFrank Mayhar if (sbi->s_journal) 1978e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 1979ac27a0ecSDave Kleikamp 1980e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1981281b5995STheodore Ts'o done: 1982ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1983a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1984a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1985ac27a0ecSDave Kleikamp sb->s_blocksize, 1986ac27a0ecSDave Kleikamp sbi->s_groups_count, 1987617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1988617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1989a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1990ac27a0ecSDave Kleikamp 19917abc52c2SDan Magenheimer cleancache_init_fs(sb); 1992ac27a0ecSDave Kleikamp return res; 1993ac27a0ecSDave Kleikamp } 1994ac27a0ecSDave Kleikamp 1995117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 1996117fff10STheodore Ts'o { 1997117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 1998117fff10STheodore Ts'o struct flex_groups *new_groups; 1999117fff10STheodore Ts'o int size; 2000117fff10STheodore Ts'o 2001117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 2002117fff10STheodore Ts'o return 0; 2003117fff10STheodore Ts'o 2004117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 2005117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 2006117fff10STheodore Ts'o return 0; 2007117fff10STheodore Ts'o 2008117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 2009117fff10STheodore Ts'o new_groups = ext4_kvzalloc(size, GFP_KERNEL); 2010117fff10STheodore Ts'o if (!new_groups) { 2011117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 2012117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 2013117fff10STheodore Ts'o return -ENOMEM; 2014117fff10STheodore Ts'o } 2015117fff10STheodore Ts'o 2016117fff10STheodore Ts'o if (sbi->s_flex_groups) { 2017117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 2018117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 2019117fff10STheodore Ts'o sizeof(struct flex_groups))); 2020b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 2021117fff10STheodore Ts'o } 2022117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 2023117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 2024117fff10STheodore Ts'o return 0; 2025117fff10STheodore Ts'o } 2026117fff10STheodore Ts'o 2027772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 2028772cb7c8SJose R. Santos { 2029772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 2030772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 2031772cb7c8SJose R. Santos ext4_group_t flex_group; 2032117fff10STheodore Ts'o int i, err; 2033772cb7c8SJose R. Santos 2034503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 2035d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 2036772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 2037772cb7c8SJose R. Santos return 1; 2038772cb7c8SJose R. Santos } 2039772cb7c8SJose R. Santos 2040117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 2041117fff10STheodore Ts'o if (err) 2042772cb7c8SJose R. Santos goto failed; 2043772cb7c8SJose R. Santos 2044772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 204588b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 2046772cb7c8SJose R. Santos 2047772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 20487ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 20497ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 205090ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 205124aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 20527ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 20537ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 2054772cb7c8SJose R. Santos } 2055772cb7c8SJose R. Santos 2056772cb7c8SJose R. Santos return 1; 2057772cb7c8SJose R. Santos failed: 2058772cb7c8SJose R. Santos return 0; 2059772cb7c8SJose R. Santos } 2060772cb7c8SJose R. Santos 2061e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 2062717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2063717d50e4SAndreas Dilger { 2064feb0ab32SDarrick J. Wong int offset; 2065717d50e4SAndreas Dilger __u16 crc = 0; 2066717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2067e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 2068717d50e4SAndreas Dilger 20699aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 2070feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 2071d6a77105STheodore Ts'o __le16 save_csum; 2072feb0ab32SDarrick J. Wong __u32 csum32; 2073feb0ab32SDarrick J. Wong 2074d6a77105STheodore Ts'o save_csum = gdp->bg_checksum; 2075feb0ab32SDarrick J. Wong gdp->bg_checksum = 0; 2076feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 2077feb0ab32SDarrick J. Wong sizeof(le_group)); 2078feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, 2079feb0ab32SDarrick J. Wong sbi->s_desc_size); 2080d6a77105STheodore Ts'o gdp->bg_checksum = save_csum; 2081feb0ab32SDarrick J. Wong 2082feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2083feb0ab32SDarrick J. Wong goto out; 2084feb0ab32SDarrick J. Wong } 2085feb0ab32SDarrick J. Wong 2086feb0ab32SDarrick J. Wong /* old crc16 code */ 2087e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 2088813d32f9SDarrick J. Wong return 0; 2089813d32f9SDarrick J. Wong 2090feb0ab32SDarrick J. Wong offset = offsetof(struct ext4_group_desc, bg_checksum); 2091feb0ab32SDarrick J. Wong 2092717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2093717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2094717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2095717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2096717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2097e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 2098717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2099717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2100717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2101717d50e4SAndreas Dilger offset); 2102717d50e4SAndreas Dilger 2103feb0ab32SDarrick J. Wong out: 2104717d50e4SAndreas Dilger return cpu_to_le16(crc); 2105717d50e4SAndreas Dilger } 2106717d50e4SAndreas Dilger 2107feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2108717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2109717d50e4SAndreas Dilger { 2110feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2111e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 2112717d50e4SAndreas Dilger return 0; 2113717d50e4SAndreas Dilger 2114717d50e4SAndreas Dilger return 1; 2115717d50e4SAndreas Dilger } 2116717d50e4SAndreas Dilger 2117feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2118feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2119feb0ab32SDarrick J. Wong { 2120feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2121feb0ab32SDarrick J. Wong return; 2122e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 2123feb0ab32SDarrick J. Wong } 2124feb0ab32SDarrick J. Wong 2125ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2126bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2127bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2128ac27a0ecSDave Kleikamp { 2129617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2130617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2131617ba13bSMingming Cao ext4_fsblk_t last_block; 2132bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2133bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2134bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2135ce421581SJose R. Santos int flexbg_flag = 0; 2136bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2137ac27a0ecSDave Kleikamp 2138e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 2139ce421581SJose R. Santos flexbg_flag = 1; 2140ce421581SJose R. Santos 2141617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2142ac27a0ecSDave Kleikamp 2143197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2144197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2145197cd65aSAkinobu Mita 2146ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2147bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2148ac27a0ecSDave Kleikamp else 2149ac27a0ecSDave Kleikamp last_block = first_block + 2150617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2151ac27a0ecSDave Kleikamp 2152bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2153bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2154bfff6873SLukas Czerner grp = i; 2155bfff6873SLukas Czerner 21568fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 21572b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2158b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2159a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2160b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2161ac27a0ecSDave Kleikamp return 0; 2162ac27a0ecSDave Kleikamp } 21638fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 21642b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2165b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2166a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2167b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2168ac27a0ecSDave Kleikamp return 0; 2169ac27a0ecSDave Kleikamp } 21708fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2171bd81d8eeSLaurent Vivier if (inode_table < first_block || 21722b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2173b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2174a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2175b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2176ac27a0ecSDave Kleikamp return 0; 2177ac27a0ecSDave Kleikamp } 2178955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2179feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2180b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2181b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2182e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 2183fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 21847ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2185955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2186717d50e4SAndreas Dilger return 0; 2187717d50e4SAndreas Dilger } 21887ee1ec4cSLi Zefan } 2189955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2190ce421581SJose R. Santos if (!flexbg_flag) 2191617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2192ac27a0ecSDave Kleikamp } 2193bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2194bfff6873SLukas Czerner *first_not_zeroed = grp; 2195ac27a0ecSDave Kleikamp return 1; 2196ac27a0ecSDave Kleikamp } 2197ac27a0ecSDave Kleikamp 2198617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2199ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2200ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2201ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2202ac27a0ecSDave Kleikamp * 2203ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2204ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2205ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2206ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2207ac27a0ecSDave Kleikamp * 2208ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2209ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2210ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2211617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2212ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2213ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2214ac27a0ecSDave Kleikamp */ 2215617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2216617ba13bSMingming Cao struct ext4_super_block *es) 2217ac27a0ecSDave Kleikamp { 2218ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2219ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2220ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2221ac27a0ecSDave Kleikamp int i; 2222ac27a0ecSDave Kleikamp #endif 2223ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2224ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2225ac27a0ecSDave Kleikamp return; 2226ac27a0ecSDave Kleikamp } 2227ac27a0ecSDave Kleikamp 2228a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2229b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2230b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2231a8f48a95SEric Sandeen return; 2232a8f48a95SEric Sandeen } 2233a8f48a95SEric Sandeen 2234d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2235d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2236d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2237d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2238d39195c3SAmir Goldstein return; 2239d39195c3SAmir Goldstein } 2240d39195c3SAmir Goldstein 2241617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2242c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 2243c25f9bc6SEric Sandeen if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { 224484474976SDmitry Monakhov ext4_msg(sb, KERN_INFO, "Errors on filesystem, " 2245ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2246ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2247c25f9bc6SEric Sandeen } 2248ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2249ac27a0ecSDave Kleikamp return; 2250ac27a0ecSDave Kleikamp } 2251ac27a0ecSDave Kleikamp 2252ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2253b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2254ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2255ac27a0ecSDave Kleikamp } 2256ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2257ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2258ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2259ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2260a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2261617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2262617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2263ac27a0ecSDave Kleikamp if (ret < 0) 2264b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2265b31e1552SEric Sandeen "Cannot turn on journaled " 2266b31e1552SEric Sandeen "quota: error %d", ret); 2267ac27a0ecSDave Kleikamp } 2268ac27a0ecSDave Kleikamp } 2269ac27a0ecSDave Kleikamp #endif 2270ac27a0ecSDave Kleikamp 2271ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2272ac27a0ecSDave Kleikamp struct inode *inode; 2273ac27a0ecSDave Kleikamp 227497bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 227597bd42b9SJosef Bacik if (IS_ERR(inode)) { 2276ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2277ac27a0ecSDave Kleikamp break; 2278ac27a0ecSDave Kleikamp } 2279ac27a0ecSDave Kleikamp 2280617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2281871a2931SChristoph Hellwig dquot_initialize(inode); 2282ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2283566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2284b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2285b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 228646e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2287e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2288ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2289721e3ebaSTheodore Ts'o mutex_lock(&inode->i_mutex); 229055f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 2291617ba13bSMingming Cao ext4_truncate(inode); 2292721e3ebaSTheodore Ts'o mutex_unlock(&inode->i_mutex); 2293ac27a0ecSDave Kleikamp nr_truncates++; 2294ac27a0ecSDave Kleikamp } else { 2295566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2296b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2297b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 229846e665e9SHarvey Harrison __func__, inode->i_ino); 2299ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2300ac27a0ecSDave Kleikamp inode->i_ino); 2301ac27a0ecSDave Kleikamp nr_orphans++; 2302ac27a0ecSDave Kleikamp } 2303ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2304ac27a0ecSDave Kleikamp } 2305ac27a0ecSDave Kleikamp 2306ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2307ac27a0ecSDave Kleikamp 2308ac27a0ecSDave Kleikamp if (nr_orphans) 2309b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2310b31e1552SEric Sandeen PLURAL(nr_orphans)); 2311ac27a0ecSDave Kleikamp if (nr_truncates) 2312b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2313b31e1552SEric Sandeen PLURAL(nr_truncates)); 2314ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2315ac27a0ecSDave Kleikamp /* Turn quotas off */ 2316a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2317ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2318287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2319ac27a0ecSDave Kleikamp } 2320ac27a0ecSDave Kleikamp #endif 2321ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2322ac27a0ecSDave Kleikamp } 23230b8e58a1SAndreas Dilger 2324cd2291a4SEric Sandeen /* 2325cd2291a4SEric Sandeen * Maximal extent format file size. 2326cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2327cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2328cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2329cd2291a4SEric Sandeen * so that won't be a limiting factor. 2330cd2291a4SEric Sandeen * 2331f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2332f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2333f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2334f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2335f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2336f17722f9SLukas Czerner * 2337cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2338cd2291a4SEric Sandeen */ 2339f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2340cd2291a4SEric Sandeen { 2341cd2291a4SEric Sandeen loff_t res; 2342cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2343cd2291a4SEric Sandeen 2344cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2345f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2346cd2291a4SEric Sandeen /* 234790c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2348cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2349cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2350cd2291a4SEric Sandeen */ 2351cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2352cd2291a4SEric Sandeen 2353cd2291a4SEric Sandeen /* total blocks in file system block size */ 2354cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2355cd2291a4SEric Sandeen upper_limit <<= blkbits; 2356cd2291a4SEric Sandeen } 2357cd2291a4SEric Sandeen 2358f17722f9SLukas Czerner /* 2359f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2360f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2361f17722f9SLukas Czerner * size 2362f17722f9SLukas Czerner */ 2363f17722f9SLukas Czerner res = (1LL << 32) - 1; 2364cd2291a4SEric Sandeen res <<= blkbits; 2365cd2291a4SEric Sandeen 2366cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2367cd2291a4SEric Sandeen if (res > upper_limit) 2368cd2291a4SEric Sandeen res = upper_limit; 2369cd2291a4SEric Sandeen 2370cd2291a4SEric Sandeen return res; 2371cd2291a4SEric Sandeen } 2372ac27a0ecSDave Kleikamp 2373ac27a0ecSDave Kleikamp /* 2374cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 23750fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 23760fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2377ac27a0ecSDave Kleikamp */ 2378f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2379ac27a0ecSDave Kleikamp { 2380617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 23810fc1b451SAneesh Kumar K.V int meta_blocks; 23820fc1b451SAneesh Kumar K.V loff_t upper_limit; 23830b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 23840b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 23850b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 23860b8e58a1SAndreas Dilger * 23870b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 23880b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 23890fc1b451SAneesh Kumar K.V */ 23900fc1b451SAneesh Kumar K.V 2391f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 23920fc1b451SAneesh Kumar K.V /* 239390c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 23940b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 23950b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 23960fc1b451SAneesh Kumar K.V */ 23970fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 23980fc1b451SAneesh Kumar K.V 23990fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 24000fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 24010fc1b451SAneesh Kumar K.V 24020fc1b451SAneesh Kumar K.V } else { 24038180a562SAneesh Kumar K.V /* 24048180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 24058180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 24068180a562SAneesh Kumar K.V * represent total number of blocks in 24078180a562SAneesh Kumar K.V * file system block size 24088180a562SAneesh Kumar K.V */ 24090fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 24100fc1b451SAneesh Kumar K.V 24110fc1b451SAneesh Kumar K.V } 24120fc1b451SAneesh Kumar K.V 24130fc1b451SAneesh Kumar K.V /* indirect blocks */ 24140fc1b451SAneesh Kumar K.V meta_blocks = 1; 24150fc1b451SAneesh Kumar K.V /* double indirect blocks */ 24160fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 24170fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 24180fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 24190fc1b451SAneesh Kumar K.V 24200fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 24210fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2422ac27a0ecSDave Kleikamp 2423ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2424ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2425ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2426ac27a0ecSDave Kleikamp res <<= bits; 2427ac27a0ecSDave Kleikamp if (res > upper_limit) 2428ac27a0ecSDave Kleikamp res = upper_limit; 24290fc1b451SAneesh Kumar K.V 24300fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 24310fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 24320fc1b451SAneesh Kumar K.V 2433ac27a0ecSDave Kleikamp return res; 2434ac27a0ecSDave Kleikamp } 2435ac27a0ecSDave Kleikamp 2436617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 243770bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2438ac27a0ecSDave Kleikamp { 2439617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2440fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2441ac27a0ecSDave Kleikamp int has_super = 0; 2442ac27a0ecSDave Kleikamp 2443ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2444ac27a0ecSDave Kleikamp 2445e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 244670bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2447ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2448617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2449ac27a0ecSDave Kleikamp has_super = 1; 24500b8e58a1SAndreas Dilger 2451bd63f6b0SDarrick J. Wong /* 2452bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 2453bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 2454bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 2455bd63f6b0SDarrick J. Wong * compensate. 2456bd63f6b0SDarrick J. Wong */ 2457bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 2458bd63f6b0SDarrick J. Wong le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) 2459bd63f6b0SDarrick J. Wong has_super++; 2460bd63f6b0SDarrick J. Wong 2461617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2462ac27a0ecSDave Kleikamp } 2463ac27a0ecSDave Kleikamp 2464c9de560dSAlex Tomas /** 2465c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2466c9de560dSAlex Tomas * @sbi: In memory super block info 2467c9de560dSAlex Tomas * 2468c9de560dSAlex Tomas * If we have specified it via mount option, then 2469c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2470c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2471c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2472c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2473c9de560dSAlex Tomas * 2474c9de560dSAlex Tomas */ 2475c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2476c9de560dSAlex Tomas { 2477c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2478c9de560dSAlex Tomas unsigned long stripe_width = 2479c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 24803eb08658SDan Ehrenberg int ret; 2481c9de560dSAlex Tomas 2482c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 24833eb08658SDan Ehrenberg ret = sbi->s_stripe; 24843eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 24853eb08658SDan Ehrenberg ret = stripe_width; 24863eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 24873eb08658SDan Ehrenberg ret = stride; 24883eb08658SDan Ehrenberg else 24893eb08658SDan Ehrenberg ret = 0; 2490c9de560dSAlex Tomas 24913eb08658SDan Ehrenberg /* 24923eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 24933eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 24943eb08658SDan Ehrenberg */ 24953eb08658SDan Ehrenberg if (ret <= 1) 24963eb08658SDan Ehrenberg ret = 0; 2497c9de560dSAlex Tomas 24983eb08658SDan Ehrenberg return ret; 2499c9de560dSAlex Tomas } 2500ac27a0ecSDave Kleikamp 2501a13fb1a4SEric Sandeen /* 2502a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2503a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2504a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2505a13fb1a4SEric Sandeen * 0 if it cannot be. 2506a13fb1a4SEric Sandeen */ 2507a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2508a13fb1a4SEric Sandeen { 2509e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 2510a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2511a13fb1a4SEric Sandeen "Couldn't mount because of " 2512a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2513a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2514a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2515a13fb1a4SEric Sandeen return 0; 2516a13fb1a4SEric Sandeen } 2517a13fb1a4SEric Sandeen 2518a13fb1a4SEric Sandeen if (readonly) 2519a13fb1a4SEric Sandeen return 1; 2520a13fb1a4SEric Sandeen 2521e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 25222cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 25232cb5cc8bSDarrick J. Wong sb->s_flags |= MS_RDONLY; 25242cb5cc8bSDarrick J. Wong return 1; 25252cb5cc8bSDarrick J. Wong } 25262cb5cc8bSDarrick J. Wong 2527a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2528e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 2529a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2530a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2531a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2532a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2533a13fb1a4SEric Sandeen return 0; 2534a13fb1a4SEric Sandeen } 2535a13fb1a4SEric Sandeen /* 2536a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2537a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2538a13fb1a4SEric Sandeen */ 2539e2b911c5SDarrick J. Wong if (ext4_has_feature_huge_file(sb)) { 2540a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2541a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2542a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2543a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2544a13fb1a4SEric Sandeen return 0; 2545a13fb1a4SEric Sandeen } 2546a13fb1a4SEric Sandeen } 2547e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 2548bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2549bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2550bab08ab9STheodore Ts'o "extents feature\n"); 2551bab08ab9STheodore Ts'o return 0; 2552bab08ab9STheodore Ts'o } 25537c319d32SAditya Kali 25547c319d32SAditya Kali #ifndef CONFIG_QUOTA 2555e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) && !readonly) { 25567c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 25577c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 25587c319d32SAditya Kali "without CONFIG_QUOTA"); 25597c319d32SAditya Kali return 0; 25607c319d32SAditya Kali } 25617c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2562a13fb1a4SEric Sandeen return 1; 2563a13fb1a4SEric Sandeen } 2564a13fb1a4SEric Sandeen 256566e61a9eSTheodore Ts'o /* 256666e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 256766e61a9eSTheodore Ts'o * on the file system 256866e61a9eSTheodore Ts'o */ 256966e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 257066e61a9eSTheodore Ts'o { 257166e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 257266e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 257366e61a9eSTheodore Ts'o struct ext4_super_block *es; 257466e61a9eSTheodore Ts'o 257566e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 257666e61a9eSTheodore Ts'o es = sbi->s_es; 257766e61a9eSTheodore Ts'o 257866e61a9eSTheodore Ts'o if (es->s_error_count) 2579ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 2580ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 258166e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 258266e61a9eSTheodore Ts'o if (es->s_first_error_time) { 2583ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", 258466e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 258566e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 258666e61a9eSTheodore Ts'o es->s_first_error_func, 258766e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 258866e61a9eSTheodore Ts'o if (es->s_first_error_ino) 258966e61a9eSTheodore Ts'o printk(": inode %u", 259066e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 259166e61a9eSTheodore Ts'o if (es->s_first_error_block) 259266e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 259366e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 259466e61a9eSTheodore Ts'o printk("\n"); 259566e61a9eSTheodore Ts'o } 259666e61a9eSTheodore Ts'o if (es->s_last_error_time) { 2597ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", 259866e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 259966e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 260066e61a9eSTheodore Ts'o es->s_last_error_func, 260166e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 260266e61a9eSTheodore Ts'o if (es->s_last_error_ino) 260366e61a9eSTheodore Ts'o printk(": inode %u", 260466e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 260566e61a9eSTheodore Ts'o if (es->s_last_error_block) 260666e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 260766e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 260866e61a9eSTheodore Ts'o printk("\n"); 260966e61a9eSTheodore Ts'o } 261066e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 261166e61a9eSTheodore Ts'o } 261266e61a9eSTheodore Ts'o 2613bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2614bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2615bfff6873SLukas Czerner { 2616bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2617bfff6873SLukas Czerner ext4_group_t group, ngroups; 2618bfff6873SLukas Czerner struct super_block *sb; 2619bfff6873SLukas Czerner unsigned long timeout = 0; 2620bfff6873SLukas Czerner int ret = 0; 2621bfff6873SLukas Czerner 2622bfff6873SLukas Czerner sb = elr->lr_super; 2623bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2624bfff6873SLukas Czerner 26258e8ad8a5SJan Kara sb_start_write(sb); 2626bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2627bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2628bfff6873SLukas Czerner if (!gdp) { 2629bfff6873SLukas Czerner ret = 1; 2630bfff6873SLukas Czerner break; 2631bfff6873SLukas Czerner } 2632bfff6873SLukas Czerner 2633bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2634bfff6873SLukas Czerner break; 2635bfff6873SLukas Czerner } 2636bfff6873SLukas Czerner 26377f511862STheodore Ts'o if (group >= ngroups) 2638bfff6873SLukas Czerner ret = 1; 2639bfff6873SLukas Czerner 2640bfff6873SLukas Czerner if (!ret) { 2641bfff6873SLukas Czerner timeout = jiffies; 2642bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2643bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2644bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 264551ce6511SLukas Czerner timeout = (jiffies - timeout) * 264651ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2647bfff6873SLukas Czerner elr->lr_timeout = timeout; 2648bfff6873SLukas Czerner } 2649bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2650bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2651bfff6873SLukas Czerner } 26528e8ad8a5SJan Kara sb_end_write(sb); 2653bfff6873SLukas Czerner 2654bfff6873SLukas Czerner return ret; 2655bfff6873SLukas Czerner } 2656bfff6873SLukas Czerner 2657bfff6873SLukas Czerner /* 2658bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 26594ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2660bfff6873SLukas Czerner */ 2661bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2662bfff6873SLukas Czerner { 2663bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2664bfff6873SLukas Czerner 2665bfff6873SLukas Czerner if (!elr) 2666bfff6873SLukas Czerner return; 2667bfff6873SLukas Czerner 2668bfff6873SLukas Czerner sbi = elr->lr_sbi; 2669bfff6873SLukas Czerner 2670bfff6873SLukas Czerner list_del(&elr->lr_request); 2671bfff6873SLukas Czerner sbi->s_li_request = NULL; 2672bfff6873SLukas Czerner kfree(elr); 2673bfff6873SLukas Czerner } 2674bfff6873SLukas Czerner 2675bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2676bfff6873SLukas Czerner { 26771bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 26781bb933fbSLukas Czerner if (!ext4_li_info) { 26791bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2680bfff6873SLukas Czerner return; 26811bb933fbSLukas Czerner } 2682bfff6873SLukas Czerner 2683bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 26841bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2685bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 26861bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2687bfff6873SLukas Czerner } 2688bfff6873SLukas Czerner 26898f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 26908f1f7453SEric Sandeen 2691bfff6873SLukas Czerner /* 2692bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2693bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2694bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2695bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2696bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2697bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2698bfff6873SLukas Czerner * next waking time and put itself into sleep. 2699bfff6873SLukas Czerner */ 2700bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2701bfff6873SLukas Czerner { 2702bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2703bfff6873SLukas Czerner struct list_head *pos, *n; 2704bfff6873SLukas Czerner struct ext4_li_request *elr; 27054ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2706bfff6873SLukas Czerner 2707bfff6873SLukas Czerner BUG_ON(NULL == eli); 2708bfff6873SLukas Czerner 2709bfff6873SLukas Czerner cont_thread: 2710bfff6873SLukas Czerner while (true) { 2711bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2712bfff6873SLukas Czerner 2713bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2714bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2715bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2716bfff6873SLukas Czerner goto exit_thread; 2717bfff6873SLukas Czerner } 2718bfff6873SLukas Czerner 2719bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2720bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2721bfff6873SLukas Czerner lr_request); 2722bfff6873SLukas Czerner 2723b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2724b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2725b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2726bfff6873SLukas Czerner ext4_remove_li_request(elr); 2727bfff6873SLukas Czerner continue; 2728bfff6873SLukas Czerner } 2729b2c78cd0STheodore Ts'o } 2730bfff6873SLukas Czerner 2731bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2732bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2733bfff6873SLukas Czerner } 2734bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2735bfff6873SLukas Czerner 2736a0acae0eSTejun Heo try_to_freeze(); 2737bfff6873SLukas Czerner 27384ed5c033SLukas Czerner cur = jiffies; 27394ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2740f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2741bfff6873SLukas Czerner cond_resched(); 2742bfff6873SLukas Czerner continue; 2743bfff6873SLukas Czerner } 2744bfff6873SLukas Czerner 27454ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 27464ed5c033SLukas Czerner 27478f1f7453SEric Sandeen if (kthread_should_stop()) { 27488f1f7453SEric Sandeen ext4_clear_request_list(); 27498f1f7453SEric Sandeen goto exit_thread; 27508f1f7453SEric Sandeen } 2751bfff6873SLukas Czerner } 2752bfff6873SLukas Czerner 2753bfff6873SLukas Czerner exit_thread: 2754bfff6873SLukas Czerner /* 2755bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2756bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2757bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2758bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2759bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2760bfff6873SLukas Czerner * new one. 2761bfff6873SLukas Czerner */ 2762bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2763bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2764bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 2765bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2766bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2767bfff6873SLukas Czerner goto cont_thread; 2768bfff6873SLukas Czerner } 2769bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2770bfff6873SLukas Czerner kfree(ext4_li_info); 2771bfff6873SLukas Czerner ext4_li_info = NULL; 2772bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2773bfff6873SLukas Czerner 2774bfff6873SLukas Czerner return 0; 2775bfff6873SLukas Czerner } 2776bfff6873SLukas Czerner 2777bfff6873SLukas Czerner static void ext4_clear_request_list(void) 2778bfff6873SLukas Czerner { 2779bfff6873SLukas Czerner struct list_head *pos, *n; 2780bfff6873SLukas Czerner struct ext4_li_request *elr; 2781bfff6873SLukas Czerner 2782bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2783bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 2784bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2785bfff6873SLukas Czerner lr_request); 2786bfff6873SLukas Czerner ext4_remove_li_request(elr); 2787bfff6873SLukas Czerner } 2788bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2789bfff6873SLukas Czerner } 2790bfff6873SLukas Czerner 2791bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 2792bfff6873SLukas Czerner { 27938f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 27948f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 27958f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 27968f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 2797bfff6873SLukas Czerner ext4_clear_request_list(); 2798bfff6873SLukas Czerner kfree(ext4_li_info); 2799bfff6873SLukas Czerner ext4_li_info = NULL; 280092b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 2801bfff6873SLukas Czerner "initialization thread\n", 2802bfff6873SLukas Czerner err); 2803bfff6873SLukas Czerner return err; 2804bfff6873SLukas Czerner } 2805bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 2806bfff6873SLukas Czerner return 0; 2807bfff6873SLukas Czerner } 2808bfff6873SLukas Czerner 2809bfff6873SLukas Czerner /* 2810bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 2811bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 2812bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 2813bfff6873SLukas Czerner * groups and return total number of groups. 2814bfff6873SLukas Czerner */ 2815bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 2816bfff6873SLukas Czerner { 2817bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 2818bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2819bfff6873SLukas Czerner 2820bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 2821bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2822bfff6873SLukas Czerner if (!gdp) 2823bfff6873SLukas Czerner continue; 2824bfff6873SLukas Czerner 2825bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2826bfff6873SLukas Czerner break; 2827bfff6873SLukas Czerner } 2828bfff6873SLukas Czerner 2829bfff6873SLukas Czerner return group; 2830bfff6873SLukas Czerner } 2831bfff6873SLukas Czerner 2832bfff6873SLukas Czerner static int ext4_li_info_new(void) 2833bfff6873SLukas Czerner { 2834bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 2835bfff6873SLukas Czerner 2836bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 2837bfff6873SLukas Czerner if (!eli) 2838bfff6873SLukas Czerner return -ENOMEM; 2839bfff6873SLukas Czerner 2840bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 2841bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 2842bfff6873SLukas Czerner 2843bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 2844bfff6873SLukas Czerner 2845bfff6873SLukas Czerner ext4_li_info = eli; 2846bfff6873SLukas Czerner 2847bfff6873SLukas Czerner return 0; 2848bfff6873SLukas Czerner } 2849bfff6873SLukas Czerner 2850bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 2851bfff6873SLukas Czerner ext4_group_t start) 2852bfff6873SLukas Czerner { 2853bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2854bfff6873SLukas Czerner struct ext4_li_request *elr; 2855bfff6873SLukas Czerner 2856bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 2857bfff6873SLukas Czerner if (!elr) 2858bfff6873SLukas Czerner return NULL; 2859bfff6873SLukas Czerner 2860bfff6873SLukas Czerner elr->lr_super = sb; 2861bfff6873SLukas Czerner elr->lr_sbi = sbi; 2862bfff6873SLukas Czerner elr->lr_next_group = start; 2863bfff6873SLukas Czerner 2864bfff6873SLukas Czerner /* 2865bfff6873SLukas Czerner * Randomize first schedule time of the request to 2866bfff6873SLukas Czerner * spread the inode table initialization requests 2867bfff6873SLukas Czerner * better. 2868bfff6873SLukas Czerner */ 2869dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 2870dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 2871bfff6873SLukas Czerner return elr; 2872bfff6873SLukas Czerner } 2873bfff6873SLukas Czerner 28747f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 2875bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 2876bfff6873SLukas Czerner { 2877bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 28787f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 2879bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 28806c5a6cb9SAndrew Morton int ret = 0; 2881bfff6873SLukas Czerner 28827f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 288351ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 288451ce6511SLukas Czerner /* 288551ce6511SLukas Czerner * Reset timeout so it can be computed again, because 288651ce6511SLukas Czerner * s_li_wait_mult might have changed. 288751ce6511SLukas Czerner */ 288851ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 28897f511862STheodore Ts'o goto out; 289051ce6511SLukas Czerner } 2891bfff6873SLukas Czerner 2892bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 2893bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 289455ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 28957f511862STheodore Ts'o goto out; 2896bfff6873SLukas Czerner 2897bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 28987f511862STheodore Ts'o if (!elr) { 28997f511862STheodore Ts'o ret = -ENOMEM; 29007f511862STheodore Ts'o goto out; 29017f511862STheodore Ts'o } 2902bfff6873SLukas Czerner 2903bfff6873SLukas Czerner if (NULL == ext4_li_info) { 2904bfff6873SLukas Czerner ret = ext4_li_info_new(); 2905bfff6873SLukas Czerner if (ret) 2906bfff6873SLukas Czerner goto out; 2907bfff6873SLukas Czerner } 2908bfff6873SLukas Czerner 2909bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2910bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 2911bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2912bfff6873SLukas Czerner 2913bfff6873SLukas Czerner sbi->s_li_request = elr; 291446e4690bSTao Ma /* 291546e4690bSTao Ma * set elr to NULL here since it has been inserted to 291646e4690bSTao Ma * the request_list and the removal and free of it is 291746e4690bSTao Ma * handled by ext4_clear_request_list from now on. 291846e4690bSTao Ma */ 291946e4690bSTao Ma elr = NULL; 2920bfff6873SLukas Czerner 2921bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 2922bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 2923bfff6873SLukas Czerner if (ret) 2924bfff6873SLukas Czerner goto out; 2925bfff6873SLukas Czerner } 2926bfff6873SLukas Czerner out: 2927bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2928beed5ecbSNicolas Kaiser if (ret) 2929bfff6873SLukas Czerner kfree(elr); 2930bfff6873SLukas Czerner return ret; 2931bfff6873SLukas Czerner } 2932bfff6873SLukas Czerner 2933bfff6873SLukas Czerner /* 2934bfff6873SLukas Czerner * We do not need to lock anything since this is called on 2935bfff6873SLukas Czerner * module unload. 2936bfff6873SLukas Czerner */ 2937bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 2938bfff6873SLukas Czerner { 2939bfff6873SLukas Czerner /* 2940bfff6873SLukas Czerner * If thread exited earlier 2941bfff6873SLukas Czerner * there's nothing to be done. 2942bfff6873SLukas Czerner */ 29438f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 2944bfff6873SLukas Czerner return; 2945bfff6873SLukas Czerner 29468f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 2947bfff6873SLukas Czerner } 2948bfff6873SLukas Czerner 294925ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 295025ed6e8aSDarrick J. Wong { 295125ed6e8aSDarrick J. Wong int ret = 1; 295225ed6e8aSDarrick J. Wong int compat, incompat; 295325ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 295425ed6e8aSDarrick J. Wong 29559aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 2956db9ee220SDarrick J. Wong /* journal checksum v3 */ 295725ed6e8aSDarrick J. Wong compat = 0; 2958db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 295925ed6e8aSDarrick J. Wong } else { 296025ed6e8aSDarrick J. Wong /* journal checksum v1 */ 296125ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 296225ed6e8aSDarrick J. Wong incompat = 0; 296325ed6e8aSDarrick J. Wong } 296425ed6e8aSDarrick J. Wong 2965feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 2966feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2967feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 2968feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 296925ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 297025ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 297125ed6e8aSDarrick J. Wong compat, 0, 297225ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 297325ed6e8aSDarrick J. Wong incompat); 297425ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 297525ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 297625ed6e8aSDarrick J. Wong compat, 0, 297725ed6e8aSDarrick J. Wong incompat); 297825ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 297925ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 298025ed6e8aSDarrick J. Wong } else { 2981feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 2982feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 298325ed6e8aSDarrick J. Wong } 298425ed6e8aSDarrick J. Wong 298525ed6e8aSDarrick J. Wong return ret; 298625ed6e8aSDarrick J. Wong } 298725ed6e8aSDarrick J. Wong 2988952fc18eSTheodore Ts'o /* 2989952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 2990952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 2991952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 2992952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 2993952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 2994952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 2995952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 2996952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 2997952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 2998952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 2999952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3000952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3001952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3002952fc18eSTheodore Ts'o */ 3003952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3004952fc18eSTheodore Ts'o char *buf) 3005952fc18eSTheodore Ts'o { 3006952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3007952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3008952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3009952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3010952fc18eSTheodore Ts'o int s, j, count = 0; 3011952fc18eSTheodore Ts'o 3012e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 30130548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 30140548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 30150548bbb8STheodore Ts'o 3016952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3017952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3018952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3019952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3020952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3021952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3022952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3023952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3024952fc18eSTheodore Ts'o count++; 3025952fc18eSTheodore Ts'o } 3026952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3027952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3028952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3029952fc18eSTheodore Ts'o count++; 3030952fc18eSTheodore Ts'o } 3031952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3032952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3033952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3034952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3035952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3036952fc18eSTheodore Ts'o count++; 3037952fc18eSTheodore Ts'o } 3038952fc18eSTheodore Ts'o if (i != grp) 3039952fc18eSTheodore Ts'o continue; 3040952fc18eSTheodore Ts'o s = 0; 3041952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3042952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3043952fc18eSTheodore Ts'o count++; 3044952fc18eSTheodore Ts'o } 3045952fc18eSTheodore Ts'o for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { 3046952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3047952fc18eSTheodore Ts'o count++; 3048952fc18eSTheodore Ts'o } 3049952fc18eSTheodore Ts'o } 3050952fc18eSTheodore Ts'o if (!count) 3051952fc18eSTheodore Ts'o return 0; 3052952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3053952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3054952fc18eSTheodore Ts'o } 3055952fc18eSTheodore Ts'o 3056952fc18eSTheodore Ts'o /* 3057952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3058952fc18eSTheodore Ts'o */ 3059952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3060952fc18eSTheodore Ts'o { 3061952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3062952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 3063952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3064952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 30654fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 3066952fc18eSTheodore Ts'o 3067952fc18eSTheodore Ts'o if (!buf) 3068952fc18eSTheodore Ts'o return -ENOMEM; 3069952fc18eSTheodore Ts'o 3070952fc18eSTheodore Ts'o /* 3071952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3072952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3073952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3074952fc18eSTheodore Ts'o */ 3075952fc18eSTheodore Ts'o 3076952fc18eSTheodore Ts'o /* 3077952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3078952fc18eSTheodore Ts'o */ 3079952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3080952fc18eSTheodore Ts'o 3081952fc18eSTheodore Ts'o /* 3082952fc18eSTheodore Ts'o * Add the overhead found in each block group 3083952fc18eSTheodore Ts'o */ 3084952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3085952fc18eSTheodore Ts'o int blks; 3086952fc18eSTheodore Ts'o 3087952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3088952fc18eSTheodore Ts'o overhead += blks; 3089952fc18eSTheodore Ts'o if (blks) 3090952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3091952fc18eSTheodore Ts'o cond_resched(); 3092952fc18eSTheodore Ts'o } 3093b003b524SEric Sandeen /* Add the internal journal blocks as well */ 3094b003b524SEric Sandeen if (sbi->s_journal && !sbi->journal_bdev) 3095810da240SLukas Czerner overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); 30960875a2b4SEric Sandeen 3097952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3098952fc18eSTheodore Ts'o smp_wmb(); 3099952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3100952fc18eSTheodore Ts'o return 0; 3101952fc18eSTheodore Ts'o } 3102952fc18eSTheodore Ts'o 3103b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 310427dd4385SLukas Czerner { 310527dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 3106b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 310727dd4385SLukas Czerner 310827dd4385SLukas Czerner /* 310930fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 311030fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 311130fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 311230fac0f7SJan Kara * to keep ext2/3 backward compatibility. 311330fac0f7SJan Kara */ 3114e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 3115b5799018STheodore Ts'o return; 311630fac0f7SJan Kara /* 311727dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 311827dd4385SLukas Czerner * This should cover the situations where we can not afford to run 311927dd4385SLukas Czerner * out of space like for example punch hole, or converting 3120556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 312127dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 312227dd4385SLukas Czerner * very rare. 312327dd4385SLukas Czerner */ 3124b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 3125b5799018STheodore Ts'o sbi->s_cluster_bits); 312627dd4385SLukas Czerner 312727dd4385SLukas Czerner do_div(resv_clusters, 50); 312827dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 312927dd4385SLukas Czerner 3130b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 313127dd4385SLukas Czerner } 313227dd4385SLukas Czerner 3133617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3134ac27a0ecSDave Kleikamp { 3135d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3136ac27a0ecSDave Kleikamp struct buffer_head *bh; 3137617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3138617ba13bSMingming Cao struct ext4_sb_info *sbi; 3139617ba13bSMingming Cao ext4_fsblk_t block; 3140617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 314170bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3142ac27a0ecSDave Kleikamp unsigned long offset = 0; 3143ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3144ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3145ac27a0ecSDave Kleikamp struct inode *root; 31460390131bSFrank Mayhar const char *descr; 3147dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3148281b5995STheodore Ts'o int blocksize, clustersize; 31494ec11028STheodore Ts'o unsigned int db_count; 31504ec11028STheodore Ts'o unsigned int i; 3151281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3152bd81d8eeSLaurent Vivier __u64 blocks_count; 315307aa2ea1SLukas Czerner int err = 0; 3154b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3155bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3156ac27a0ecSDave Kleikamp 3157ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3158ac27a0ecSDave Kleikamp if (!sbi) 3159dcc7dae3SCyrill Gorcunov goto out_free_orig; 3160705895b6SPekka Enberg 3161705895b6SPekka Enberg sbi->s_blockgroup_lock = 3162705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3163705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3164705895b6SPekka Enberg kfree(sbi); 3165dcc7dae3SCyrill Gorcunov goto out_free_orig; 3166705895b6SPekka Enberg } 3167ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 31682c0544b2STheodore Ts'o sbi->s_sb = sb; 3169240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3170d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3171f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3172f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3173f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3174ac27a0ecSDave Kleikamp 31759f6200bbSTheodore Ts'o /* Cleanup superblock name */ 3176ec3904dcSRasmus Villemoes strreplace(sb->s_id, '/', '!'); 31779f6200bbSTheodore Ts'o 317807aa2ea1SLukas Czerner /* -EINVAL is default */ 3179dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3180617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3181ac27a0ecSDave Kleikamp if (!blocksize) { 3182b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3183ac27a0ecSDave Kleikamp goto out_fail; 3184ac27a0ecSDave Kleikamp } 3185ac27a0ecSDave Kleikamp 3186ac27a0ecSDave Kleikamp /* 3187617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3188ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3189ac27a0ecSDave Kleikamp */ 3190617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 319170bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 319270bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3193ac27a0ecSDave Kleikamp } else { 319470bbb3e0SAndrew Morton logical_sb_block = sb_block; 3195ac27a0ecSDave Kleikamp } 3196ac27a0ecSDave Kleikamp 3197a8ac900bSGioh Kim if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { 3198b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3199ac27a0ecSDave Kleikamp goto out_fail; 3200ac27a0ecSDave Kleikamp } 3201ac27a0ecSDave Kleikamp /* 3202ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3203617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3204ac27a0ecSDave Kleikamp */ 32052716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3206ac27a0ecSDave Kleikamp sbi->s_es = es; 3207ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3208617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3209617ba13bSMingming Cao goto cantfind_ext4; 3210afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3211ac27a0ecSDave Kleikamp 3212feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3213e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 3214e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 3215363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 3216feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3217feb0ab32SDarrick J. Wong 3218d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3219d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3220d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3221d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3222d25425f8SDarrick J. Wong silent = 1; 3223d25425f8SDarrick J. Wong goto cantfind_ext4; 3224d25425f8SDarrick J. Wong } 3225d25425f8SDarrick J. Wong 32260441984aSDarrick J. Wong /* Load the checksum driver */ 3227e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb)) { 32280441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 32290441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 32300441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 32310441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 32320441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 32330441984aSDarrick J. Wong goto failed_mount; 32340441984aSDarrick J. Wong } 32350441984aSDarrick J. Wong } 32360441984aSDarrick J. Wong 3237a9c47317SDarrick J. Wong /* Check superblock checksum */ 3238a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3239a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3240a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3241a9c47317SDarrick J. Wong silent = 1; 32426a797d27SDarrick J. Wong ret = -EFSBADCRC; 3243a9c47317SDarrick J. Wong goto cantfind_ext4; 3244a9c47317SDarrick J. Wong } 3245a9c47317SDarrick J. Wong 3246a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 3247e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 32488c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 32498c81bd8fSDarrick J. Wong else if (ext4_has_metadata_csum(sb)) 3250a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3251a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3252a9c47317SDarrick J. Wong 3253ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3254ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3255fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3256617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3257fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 325887f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3259fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3260617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3261fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3262ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3263fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 326403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3265fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 32662e7842b8SHugh Dickins #endif 326798c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 326898c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 326998c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 327098c1a759SDarrick J. Wong 3271617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3272fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3273617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3274fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3275617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3276fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3277ac27a0ecSDave Kleikamp 3278617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3279fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3280bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3281fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3282bb4f397aSAneesh Kumar K.V else 3283fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 328445f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 3285fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 32868b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3287fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3288ac27a0ecSDave Kleikamp 328908cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 329008cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 329130773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 329230773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 329330773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3294ac27a0ecSDave Kleikamp 32958b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3296fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3297ac27a0ecSDave Kleikamp 32981e2462f9SMingming Cao /* 3299dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3300dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3301dd919b98SAneesh Kumar K.V */ 3302bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 33038b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3304fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3305dd919b98SAneesh Kumar K.V 330651ce6511SLukas Czerner /* 330751ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 330851ce6511SLukas Czerner * no mount option specified. 330951ce6511SLukas Czerner */ 331051ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 331151ce6511SLukas Czerner 33128b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 3313661aa520SEric Sandeen &journal_devnum, &journal_ioprio, 0)) { 33148b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 33158b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 33168b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 33178b67f04aSTheodore Ts'o } 33185a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3319b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3320661aa520SEric Sandeen &journal_ioprio, 0)) 3321ac27a0ecSDave Kleikamp goto failed_mount; 3322ac27a0ecSDave Kleikamp 332356889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 332456889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 332556889787STheodore Ts'o "with data=journal disables delayed " 332656889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 332756889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 332856889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 332956889787STheodore Ts'o "both data=journal and delalloc"); 333056889787STheodore Ts'o goto failed_mount; 333156889787STheodore Ts'o } 333256889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 333356889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 33346ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 333556889787STheodore Ts'o goto failed_mount; 333656889787STheodore Ts'o } 3337923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 3338923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 3339923ae0ffSRoss Zwisler "both data=journal and dax"); 3340923ae0ffSRoss Zwisler goto failed_mount; 3341923ae0ffSRoss Zwisler } 334256889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 334356889787STheodore Ts'o clear_opt(sb, DELALLOC); 3344001e4a87STejun Heo } else { 3345001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 334656889787STheodore Ts'o } 334756889787STheodore Ts'o 3348ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3349482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3350ac27a0ecSDave Kleikamp 3351617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3352e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 3353e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 3354e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 3355b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3356b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3357b31e1552SEric Sandeen "running e2fsck is recommended"); 3358469108ffSTheodore Tso 3359ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 3360ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 3361e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 3362ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 3363ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 3364ed3654ebSTheodore Ts'o goto failed_mount; 3365ed3654ebSTheodore Ts'o } 3366ed3654ebSTheodore Ts'o } 3367ed3654ebSTheodore Ts'o 33682035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 33692035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 33702035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 33712035e776STheodore Ts'o "using the ext4 subsystem"); 33722035e776STheodore Ts'o else { 33732035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 33742035e776STheodore Ts'o "to feature incompatibilities"); 33752035e776STheodore Ts'o goto failed_mount; 33762035e776STheodore Ts'o } 33772035e776STheodore Ts'o } 33782035e776STheodore Ts'o 33792035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 33802035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 33812035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 33822035e776STheodore Ts'o "using the ext4 subsystem"); 33832035e776STheodore Ts'o else { 33842035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 33852035e776STheodore Ts'o "to feature incompatibilities"); 33862035e776STheodore Ts'o goto failed_mount; 33872035e776STheodore Ts'o } 33882035e776STheodore Ts'o } 33892035e776STheodore Ts'o 3390469108ffSTheodore Tso /* 3391ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3392ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3393ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3394ac27a0ecSDave Kleikamp */ 3395a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3396ac27a0ecSDave Kleikamp goto failed_mount; 3397a13fb1a4SEric Sandeen 3398261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3399617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3400617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3401b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3402b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3403ac27a0ecSDave Kleikamp goto failed_mount; 3404ac27a0ecSDave Kleikamp } 3405ac27a0ecSDave Kleikamp 3406923ae0ffSRoss Zwisler if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { 3407923ae0ffSRoss Zwisler if (blocksize != PAGE_SIZE) { 3408923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, 3409923ae0ffSRoss Zwisler "error: unsupported blocksize for dax"); 3410923ae0ffSRoss Zwisler goto failed_mount; 3411923ae0ffSRoss Zwisler } 3412923ae0ffSRoss Zwisler if (!sb->s_bdev->bd_disk->fops->direct_access) { 3413923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, 3414923ae0ffSRoss Zwisler "error: device does not support dax"); 3415923ae0ffSRoss Zwisler goto failed_mount; 3416923ae0ffSRoss Zwisler } 3417923ae0ffSRoss Zwisler } 3418923ae0ffSRoss Zwisler 3419e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 34206ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 34216ddb2447STheodore Ts'o es->s_encryption_level); 34226ddb2447STheodore Ts'o goto failed_mount; 34236ddb2447STheodore Ts'o } 34246ddb2447STheodore Ts'o 3425ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3426ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3427ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3428b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3429ce40733cSAneesh Kumar K.V blocksize); 3430ac27a0ecSDave Kleikamp goto failed_mount; 3431ac27a0ecSDave Kleikamp } 3432ac27a0ecSDave Kleikamp 3433ac27a0ecSDave Kleikamp brelse(bh); 343470bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 343570bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3436a8ac900bSGioh Kim bh = sb_bread_unmovable(sb, logical_sb_block); 3437ac27a0ecSDave Kleikamp if (!bh) { 3438b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3439b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3440ac27a0ecSDave Kleikamp goto failed_mount; 3441ac27a0ecSDave Kleikamp } 34422716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3443ac27a0ecSDave Kleikamp sbi->s_es = es; 3444617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3445b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3446b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3447ac27a0ecSDave Kleikamp goto failed_mount; 3448ac27a0ecSDave Kleikamp } 3449ac27a0ecSDave Kleikamp } 3450ac27a0ecSDave Kleikamp 3451e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 3452f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3453f287a1a5STheodore Ts'o has_huge_files); 3454f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3455ac27a0ecSDave Kleikamp 3456617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3457617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3458617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3459ac27a0ecSDave Kleikamp } else { 3460ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3461ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3462617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 34631330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3464ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3465b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3466b31e1552SEric Sandeen "unsupported inode size: %d", 3467ac27a0ecSDave Kleikamp sbi->s_inode_size); 3468ac27a0ecSDave Kleikamp goto failed_mount; 3469ac27a0ecSDave Kleikamp } 3470ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3471ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3472ac27a0ecSDave Kleikamp } 34730b8e58a1SAndreas Dilger 34740d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 3475e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 34768fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 34770d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3478d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3479b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3480b31e1552SEric Sandeen "unsupported descriptor size %lu", 34810d1ee42fSAlexandre Ratchov sbi->s_desc_size); 34820d1ee42fSAlexandre Ratchov goto failed_mount; 34830d1ee42fSAlexandre Ratchov } 34840d1ee42fSAlexandre Ratchov } else 34850d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 34860b8e58a1SAndreas Dilger 3487ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3488ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3489b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3490617ba13bSMingming Cao goto cantfind_ext4; 34910b8e58a1SAndreas Dilger 3492617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3493ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3494617ba13bSMingming Cao goto cantfind_ext4; 3495ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3496ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 34970d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3498ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3499ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3500e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3501e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 35020b8e58a1SAndreas Dilger 3503ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3504ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3505ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3506e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 3507f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3508f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3509f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3510f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3511f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 351223301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 351323301410STheodore Ts'o es->s_flags |= 351423301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3515f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3516f99b2589STheodore Ts'o #else 351723301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 351823301410STheodore Ts'o es->s_flags |= 351923301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3520f99b2589STheodore Ts'o #endif 3521f99b2589STheodore Ts'o } 352223301410STheodore Ts'o } 3523ac27a0ecSDave Kleikamp 3524281b5995STheodore Ts'o /* Handle clustersize */ 3525281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3526e2b911c5SDarrick J. Wong has_bigalloc = ext4_has_feature_bigalloc(sb); 3527281b5995STheodore Ts'o if (has_bigalloc) { 3528281b5995STheodore Ts'o if (clustersize < blocksize) { 3529281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3530281b5995STheodore Ts'o "cluster size (%d) smaller than " 3531281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3532281b5995STheodore Ts'o goto failed_mount; 3533281b5995STheodore Ts'o } 3534281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3535281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3536281b5995STheodore Ts'o sbi->s_clusters_per_group = 3537281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3538281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3539281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3540281b5995STheodore Ts'o "#clusters per group too big: %lu", 3541281b5995STheodore Ts'o sbi->s_clusters_per_group); 3542281b5995STheodore Ts'o goto failed_mount; 3543281b5995STheodore Ts'o } 3544281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3545281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3546281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3547281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3548281b5995STheodore Ts'o sbi->s_blocks_per_group, 3549281b5995STheodore Ts'o sbi->s_clusters_per_group); 3550281b5995STheodore Ts'o goto failed_mount; 3551281b5995STheodore Ts'o } 3552281b5995STheodore Ts'o } else { 3553281b5995STheodore Ts'o if (clustersize != blocksize) { 3554281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3555281b5995STheodore Ts'o "block size (%d)", clustersize, 3556281b5995STheodore Ts'o blocksize); 3557281b5995STheodore Ts'o clustersize = blocksize; 3558281b5995STheodore Ts'o } 3559ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3560b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3561b31e1552SEric Sandeen "#blocks per group too big: %lu", 3562ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3563ac27a0ecSDave Kleikamp goto failed_mount; 3564ac27a0ecSDave Kleikamp } 3565281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3566281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3567281b5995STheodore Ts'o } 3568281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3569281b5995STheodore Ts'o 3570ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3571b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3572b31e1552SEric Sandeen "#inodes per group too big: %lu", 3573ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3574ac27a0ecSDave Kleikamp goto failed_mount; 3575ac27a0ecSDave Kleikamp } 3576ac27a0ecSDave Kleikamp 3577960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 3578960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 3579960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 3580960fd856STheodore Ts'o 3581bf43d84bSEric Sandeen /* 3582bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3583bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3584bf43d84bSEric Sandeen */ 35855a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 358630ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 35875a9ae68aSDarrick J. Wong if (err) { 3588b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3589bf43d84bSEric Sandeen " too large to mount safely on this system"); 3590ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 359190c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 3592ac27a0ecSDave Kleikamp goto failed_mount; 3593ac27a0ecSDave Kleikamp } 3594ac27a0ecSDave Kleikamp 3595617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3596617ba13bSMingming Cao goto cantfind_ext4; 3597e7c95593SEric Sandeen 35980f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 35990f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 36000f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3601b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3602b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 36030f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 36040f2ddca6SFrom: Thiemo Nagel goto failed_mount; 36050f2ddca6SFrom: Thiemo Nagel } 36060f2ddca6SFrom: Thiemo Nagel 36074ec11028STheodore Ts'o /* 36084ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 36094ec11028STheodore Ts'o * of the filesystem. 36104ec11028STheodore Ts'o */ 36114ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3612b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3613b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3614e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 36154ec11028STheodore Ts'o ext4_blocks_count(es)); 3616e7c95593SEric Sandeen goto failed_mount; 3617e7c95593SEric Sandeen } 3618bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3619bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3620bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3621bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 36224ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3623b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 36244ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3625b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 36264ec11028STheodore Ts'o ext4_blocks_count(es), 36274ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 36284ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 36294ec11028STheodore Ts'o goto failed_mount; 36304ec11028STheodore Ts'o } 3631bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3632fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3633fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3634617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3635617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3636f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3637f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3638ac27a0ecSDave Kleikamp GFP_KERNEL); 3639ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3640b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 36412cde417dSTheodore Ts'o ret = -ENOMEM; 3642ac27a0ecSDave Kleikamp goto failed_mount; 3643ac27a0ecSDave Kleikamp } 3644ac27a0ecSDave Kleikamp 3645705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3646ac27a0ecSDave Kleikamp 3647ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 364870bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3649a8ac900bSGioh Kim sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); 3650ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3651b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3652b31e1552SEric Sandeen "can't read group descriptor %d", i); 3653ac27a0ecSDave Kleikamp db_count = i; 3654ac27a0ecSDave Kleikamp goto failed_mount2; 3655ac27a0ecSDave Kleikamp } 3656ac27a0ecSDave Kleikamp } 3657bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3658b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 36596a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 3660f9ae9cf5STheodore Ts'o goto failed_mount2; 3661ac27a0ecSDave Kleikamp } 3662772cb7c8SJose R. Santos 3663f9ae9cf5STheodore Ts'o sbi->s_gdb_count = db_count; 3664ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3665ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3666ac27a0ecSDave Kleikamp 366704ecddb7SJan Mrazek setup_timer(&sbi->s_err_report, print_daily_error_info, 366804ecddb7SJan Mrazek (unsigned long) sb); 366904496411STao Ma 3670a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 3671eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 3672ce7e010aSTheodore Ts'o goto failed_mount3; 3673ce7e010aSTheodore Ts'o 3674c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 367567a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 3676c9de560dSAlex Tomas 3677f9ae9cf5STheodore Ts'o /* 3678f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 3679f9ae9cf5STheodore Ts'o */ 3680f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 3681617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3682617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3683ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3684617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3685e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 36861fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 3687262b4662SJan Kara else 3688262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 368996c7e0d9SJan Kara sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; 3690ac27a0ecSDave Kleikamp #endif 3691f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3692f2fa2ffcSAneesh Kumar K.V 3693ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 36943b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 3695ac27a0ecSDave Kleikamp 3696ac27a0ecSDave Kleikamp sb->s_root = NULL; 3697ac27a0ecSDave Kleikamp 3698ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3699e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 3700ac27a0ecSDave Kleikamp 3701e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb) && !(sb->s_flags & MS_RDONLY)) 3702c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 370350460fe8SDarrick J. Wong goto failed_mount3a; 3704c5e06d10SJohann Lombardi 3705ac27a0ecSDave Kleikamp /* 3706ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3707ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3708ac27a0ecSDave Kleikamp */ 3709e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 3710617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 371150460fe8SDarrick J. Wong goto failed_mount3a; 37120390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 3713e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 3714b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3715b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3716744692dcSJiaying Zhang goto failed_mount_wq; 3717ac27a0ecSDave Kleikamp } else { 37181e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 37191e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 37201e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 37211e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 37221e381f60SDmitry Monakhov goto failed_mount_wq; 37231e381f60SDmitry Monakhov } 37241e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 37251e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 37261e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 37271e381f60SDmitry Monakhov goto failed_mount_wq; 37281e381f60SDmitry Monakhov } 37291e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 37301e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 37311e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 37321e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 37331e381f60SDmitry Monakhov goto failed_mount_wq; 37341e381f60SDmitry Monakhov } 37351e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 37361e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 37371e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 37381e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 37391e381f60SDmitry Monakhov goto failed_mount_wq; 37401e381f60SDmitry Monakhov } 37411e381f60SDmitry Monakhov sbi->s_def_mount_opt &= EXT4_MOUNT_JOURNAL_CHECKSUM; 37421e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 3743fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 37440390131bSFrank Mayhar sbi->s_journal = NULL; 37450390131bSFrank Mayhar needs_recovery = 0; 37460390131bSFrank Mayhar goto no_journal; 3747ac27a0ecSDave Kleikamp } 3748ac27a0ecSDave Kleikamp 3749e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 3750eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3751eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3752b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3753744692dcSJiaying Zhang goto failed_mount_wq; 3754eb40a09cSJose R. Santos } 3755eb40a09cSJose R. Santos 375625ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 375725ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 375825ed6e8aSDarrick J. Wong "feature set"); 375925ed6e8aSDarrick J. Wong goto failed_mount_wq; 3760d4da6c9cSLinus Torvalds } 3761818d276cSGirish Shilamkar 3762ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 3763ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 3764ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3765ac27a0ecSDave Kleikamp case 0: 3766ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 376763f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 376863f57933SAndrew Morton * cope, else JOURNAL_DATA 376963f57933SAndrew Morton */ 3770dab291afSMingming Cao if (jbd2_journal_check_available_features 3771dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 3772fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3773ac27a0ecSDave Kleikamp else 3774fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3775ac27a0ecSDave Kleikamp break; 3776ac27a0ecSDave Kleikamp 3777617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 3778617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 3779dab291afSMingming Cao if (!jbd2_journal_check_available_features 3780dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 3781b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 3782b31e1552SEric Sandeen "requested data journaling mode"); 3783744692dcSJiaying Zhang goto failed_mount_wq; 3784ac27a0ecSDave Kleikamp } 3785ac27a0ecSDave Kleikamp default: 3786ac27a0ecSDave Kleikamp break; 3787ac27a0ecSDave Kleikamp } 3788b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3789ac27a0ecSDave Kleikamp 379018aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 379118aadd47SBobi Jam 3792ce7e010aSTheodore Ts'o no_journal: 37939c191f70ST Makphaibulchoke if (ext4_mballoc_ready) { 37949c191f70ST Makphaibulchoke sbi->s_mb_cache = ext4_xattr_create_cache(sb->s_id); 37959c191f70ST Makphaibulchoke if (!sbi->s_mb_cache) { 37969c191f70ST Makphaibulchoke ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); 37979c191f70ST Makphaibulchoke goto failed_mount_wq; 37989c191f70ST Makphaibulchoke } 37999c191f70ST Makphaibulchoke } 38009c191f70ST Makphaibulchoke 3801e2b911c5SDarrick J. Wong if ((DUMMY_ENCRYPTION_ENABLED(sbi) || ext4_has_feature_encrypt(sb)) && 38021cb767cdSTheodore Ts'o (blocksize != PAGE_CACHE_SIZE)) { 38031cb767cdSTheodore Ts'o ext4_msg(sb, KERN_ERR, 38041cb767cdSTheodore Ts'o "Unsupported blocksize for fs encryption"); 38051cb767cdSTheodore Ts'o goto failed_mount_wq; 38061cb767cdSTheodore Ts'o } 38071cb767cdSTheodore Ts'o 3808e2b911c5SDarrick J. Wong if (DUMMY_ENCRYPTION_ENABLED(sbi) && !(sb->s_flags & MS_RDONLY) && 3809e2b911c5SDarrick J. Wong !ext4_has_feature_encrypt(sb)) { 3810e2b911c5SDarrick J. Wong ext4_set_feature_encrypt(sb); 38116ddb2447STheodore Ts'o ext4_commit_super(sb, 1); 38126ddb2447STheodore Ts'o } 38136ddb2447STheodore Ts'o 3814fd89d5f2STejun Heo /* 3815952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 3816952fc18eSTheodore Ts'o * superblock if present. 3817952fc18eSTheodore Ts'o */ 3818952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 3819952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 3820952fc18eSTheodore Ts'o else { 382107aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 382207aa2ea1SLukas Czerner if (err) 3823952fc18eSTheodore Ts'o goto failed_mount_wq; 3824952fc18eSTheodore Ts'o } 3825952fc18eSTheodore Ts'o 3826952fc18eSTheodore Ts'o /* 3827fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 3828fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 3829fd89d5f2STejun Heo */ 38302e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 38312e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 38322e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 38332e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 383407aa2ea1SLukas Czerner ret = -ENOMEM; 38352e8fa54eSJan Kara goto failed_mount4; 38362e8fa54eSJan Kara } 38372e8fa54eSJan Kara 3838ac27a0ecSDave Kleikamp /* 3839dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 3840ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 3841ac27a0ecSDave Kleikamp */ 3842ac27a0ecSDave Kleikamp 38431d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 38441d1fe1eeSDavid Howells if (IS_ERR(root)) { 3845b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 38461d1fe1eeSDavid Howells ret = PTR_ERR(root); 384732a9bb57SManish Katiyar root = NULL; 3848ac27a0ecSDave Kleikamp goto failed_mount4; 3849ac27a0ecSDave Kleikamp } 3850ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 3851b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 385294bf608aSAl Viro iput(root); 3853ac27a0ecSDave Kleikamp goto failed_mount4; 3854ac27a0ecSDave Kleikamp } 385548fde701SAl Viro sb->s_root = d_make_root(root); 38561d1fe1eeSDavid Howells if (!sb->s_root) { 3857b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 38581d1fe1eeSDavid Howells ret = -ENOMEM; 38591d1fe1eeSDavid Howells goto failed_mount4; 38601d1fe1eeSDavid Howells } 3861ac27a0ecSDave Kleikamp 38627e84b621SEric Sandeen if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) 38637e84b621SEric Sandeen sb->s_flags |= MS_RDONLY; 3864ef7f3835SKalpak Shah 3865ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 3866ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 3867ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3868ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3869e2b911c5SDarrick J. Wong if (ext4_has_feature_extra_isize(sb)) { 3870ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3871ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 3872ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3873ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 3874ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3875ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 3876ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3877ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 3878ef7f3835SKalpak Shah } 3879ef7f3835SKalpak Shah } 3880ef7f3835SKalpak Shah /* Check if enough inode space is available */ 3881ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 3882ef7f3835SKalpak Shah sbi->s_inode_size) { 3883ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3884ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3885b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 3886b31e1552SEric Sandeen "available"); 3887ef7f3835SKalpak Shah } 3888ef7f3835SKalpak Shah 3889b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 389027dd4385SLukas Czerner 38916fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 38926fd058f7STheodore Ts'o if (err) { 3893b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 3894fbe845ddSCurt Wohlgemuth "zone (%d)", err); 3895f9ae9cf5STheodore Ts'o goto failed_mount4a; 3896f9ae9cf5STheodore Ts'o } 3897f9ae9cf5STheodore Ts'o 3898f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 3899f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 3900f9ae9cf5STheodore Ts'o if (err) { 3901f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 3902f9ae9cf5STheodore Ts'o err); 3903dcf2d804STao Ma goto failed_mount5; 3904c2774d84SAneesh Kumar K.V } 3905c2774d84SAneesh Kumar K.V 3906d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 3907d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 3908d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 3909908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 3910908c7f19STejun Heo GFP_KERNEL); 3911d5e03cbbSTheodore Ts'o if (!err) { 3912d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 3913d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 3914908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 3915908c7f19STejun Heo GFP_KERNEL); 3916d5e03cbbSTheodore Ts'o } 3917d5e03cbbSTheodore Ts'o if (!err) 3918d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 3919908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 3920d5e03cbbSTheodore Ts'o if (!err) 3921908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 3922908c7f19STejun Heo GFP_KERNEL); 3923d5e03cbbSTheodore Ts'o if (err) { 3924d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 3925d5e03cbbSTheodore Ts'o goto failed_mount6; 3926d5e03cbbSTheodore Ts'o } 3927d5e03cbbSTheodore Ts'o 3928e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 3929d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 3930d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 3931d5e03cbbSTheodore Ts'o "unable to initialize " 3932d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 3933d5e03cbbSTheodore Ts'o goto failed_mount6; 3934d5e03cbbSTheodore Ts'o } 3935d5e03cbbSTheodore Ts'o 3936bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 3937bfff6873SLukas Czerner if (err) 3938dcf2d804STao Ma goto failed_mount6; 3939bfff6873SLukas Czerner 3940b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 3941dcf2d804STao Ma if (err) 3942dcf2d804STao Ma goto failed_mount7; 39433197ebdbSTheodore Ts'o 39449b2ff357SJan Kara #ifdef CONFIG_QUOTA 39459b2ff357SJan Kara /* Enable quota usage during mount. */ 3946e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) && !(sb->s_flags & MS_RDONLY)) { 39479b2ff357SJan Kara err = ext4_enable_quotas(sb); 39489b2ff357SJan Kara if (err) 39499b2ff357SJan Kara goto failed_mount8; 39509b2ff357SJan Kara } 39519b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 39529b2ff357SJan Kara 3953617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 3954617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 3955617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 39560390131bSFrank Mayhar if (needs_recovery) { 3957b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 3958617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 39590390131bSFrank Mayhar } 39600390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 39610390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 39620390131bSFrank Mayhar descr = " journalled data mode"; 39630390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 39640390131bSFrank Mayhar descr = " ordered data mode"; 39650390131bSFrank Mayhar else 39660390131bSFrank Mayhar descr = " writeback data mode"; 39670390131bSFrank Mayhar } else 39680390131bSFrank Mayhar descr = "out journal"; 39690390131bSFrank Mayhar 397079add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 397179add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 397279add3a3SLukas Czerner if (!blk_queue_discard(q)) 397379add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 397479add3a3SLukas Czerner "mounting with \"discard\" option, but " 397579add3a3SLukas Czerner "the device does not support discard"); 397679add3a3SLukas Czerner } 397779add3a3SLukas Czerner 3978e294a537STheodore Ts'o if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 3979d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 39808b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 39818b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 3982ac27a0ecSDave Kleikamp 398366e61a9eSTheodore Ts'o if (es->s_error_count) 398466e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 3985ac27a0ecSDave Kleikamp 3986efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 3987efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 3988efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 3989efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 3990efbed4dcSTheodore Ts'o 3991d4c402d9SCurt Wohlgemuth kfree(orig_data); 3992ac27a0ecSDave Kleikamp return 0; 3993ac27a0ecSDave Kleikamp 3994617ba13bSMingming Cao cantfind_ext4: 3995ac27a0ecSDave Kleikamp if (!silent) 3996b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 3997ac27a0ecSDave Kleikamp goto failed_mount; 3998ac27a0ecSDave Kleikamp 399972ba7450STheodore Ts'o #ifdef CONFIG_QUOTA 400072ba7450STheodore Ts'o failed_mount8: 4001ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 400272ba7450STheodore Ts'o #endif 4003dcf2d804STao Ma failed_mount7: 4004dcf2d804STao Ma ext4_unregister_li_request(sb); 4005dcf2d804STao Ma failed_mount6: 4006f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 4007d5e03cbbSTheodore Ts'o if (sbi->s_flex_groups) 4008b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 4009d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4010d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4011d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 4012d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 401300764937SAzat Khuzhin failed_mount5: 4014f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 4015f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 4016f9ae9cf5STheodore Ts'o failed_mount4a: 401794bf608aSAl Viro dput(sb->s_root); 401832a9bb57SManish Katiyar sb->s_root = NULL; 401994bf608aSAl Viro failed_mount4: 4020b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 40212e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 40222e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 40234c0425ffSMingming Cao failed_mount_wq: 40240390131bSFrank Mayhar if (sbi->s_journal) { 4025dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 402647b4a50bSJan Kara sbi->s_journal = NULL; 40270390131bSFrank Mayhar } 402850460fe8SDarrick J. Wong failed_mount3a: 4029d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 4030eb68d0e2SZheng Liu failed_mount3: 40319105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 4032c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4033c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4034ac27a0ecSDave Kleikamp failed_mount2: 4035ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4036ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4037b93b41d4SAl Viro kvfree(sbi->s_group_desc); 4038ac27a0ecSDave Kleikamp failed_mount: 40390441984aSDarrick J. Wong if (sbi->s_chksum_driver) 40400441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4041ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4042a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4043ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4044ac27a0ecSDave Kleikamp #endif 4045617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4046ac27a0ecSDave Kleikamp brelse(bh); 4047ac27a0ecSDave Kleikamp out_fail: 4048ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4049f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 4050ac27a0ecSDave Kleikamp kfree(sbi); 4051dcc7dae3SCyrill Gorcunov out_free_orig: 4052d4c402d9SCurt Wohlgemuth kfree(orig_data); 405307aa2ea1SLukas Czerner return err ? err : ret; 4054ac27a0ecSDave Kleikamp } 4055ac27a0ecSDave Kleikamp 4056ac27a0ecSDave Kleikamp /* 4057ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4058ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4059ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4060ac27a0ecSDave Kleikamp */ 4061617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4062ac27a0ecSDave Kleikamp { 4063617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4064ac27a0ecSDave Kleikamp 4065ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 406630773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 406730773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4068ac27a0ecSDave Kleikamp 4069a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4070ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4071dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4072ac27a0ecSDave Kleikamp else 4073dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 40745bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 40755bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 40765bf5683aSHidehiro Kawai else 40775bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4078a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4079ac27a0ecSDave Kleikamp } 4080ac27a0ecSDave Kleikamp 4081617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 4082ac27a0ecSDave Kleikamp unsigned int journal_inum) 4083ac27a0ecSDave Kleikamp { 4084ac27a0ecSDave Kleikamp struct inode *journal_inode; 4085ac27a0ecSDave Kleikamp journal_t *journal; 4086ac27a0ecSDave Kleikamp 4087e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 40880390131bSFrank Mayhar 4089ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 4090ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 4091ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 4092ac27a0ecSDave Kleikamp 40931d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 40941d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4095b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4096ac27a0ecSDave Kleikamp return NULL; 4097ac27a0ecSDave Kleikamp } 4098ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4099ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4100ac27a0ecSDave Kleikamp iput(journal_inode); 4101b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4102ac27a0ecSDave Kleikamp return NULL; 4103ac27a0ecSDave Kleikamp } 4104ac27a0ecSDave Kleikamp 4105e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4106ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 41071d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4108b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4109ac27a0ecSDave Kleikamp iput(journal_inode); 4110ac27a0ecSDave Kleikamp return NULL; 4111ac27a0ecSDave Kleikamp } 4112ac27a0ecSDave Kleikamp 4113dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4114ac27a0ecSDave Kleikamp if (!journal) { 4115b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4116ac27a0ecSDave Kleikamp iput(journal_inode); 4117ac27a0ecSDave Kleikamp return NULL; 4118ac27a0ecSDave Kleikamp } 4119ac27a0ecSDave Kleikamp journal->j_private = sb; 4120617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4121ac27a0ecSDave Kleikamp return journal; 4122ac27a0ecSDave Kleikamp } 4123ac27a0ecSDave Kleikamp 4124617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4125ac27a0ecSDave Kleikamp dev_t j_dev) 4126ac27a0ecSDave Kleikamp { 4127ac27a0ecSDave Kleikamp struct buffer_head *bh; 4128ac27a0ecSDave Kleikamp journal_t *journal; 4129617ba13bSMingming Cao ext4_fsblk_t start; 4130617ba13bSMingming Cao ext4_fsblk_t len; 4131ac27a0ecSDave Kleikamp int hblock, blocksize; 4132617ba13bSMingming Cao ext4_fsblk_t sb_block; 4133ac27a0ecSDave Kleikamp unsigned long offset; 4134617ba13bSMingming Cao struct ext4_super_block *es; 4135ac27a0ecSDave Kleikamp struct block_device *bdev; 4136ac27a0ecSDave Kleikamp 4137e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 41380390131bSFrank Mayhar 4139b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4140ac27a0ecSDave Kleikamp if (bdev == NULL) 4141ac27a0ecSDave Kleikamp return NULL; 4142ac27a0ecSDave Kleikamp 4143ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4144e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4145ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4146b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4147b31e1552SEric Sandeen "blocksize too small for journal device"); 4148ac27a0ecSDave Kleikamp goto out_bdev; 4149ac27a0ecSDave Kleikamp } 4150ac27a0ecSDave Kleikamp 4151617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4152617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4153ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4154ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4155b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4156b31e1552SEric Sandeen "external journal"); 4157ac27a0ecSDave Kleikamp goto out_bdev; 4158ac27a0ecSDave Kleikamp } 4159ac27a0ecSDave Kleikamp 41602716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4161617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4162ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4163617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4164b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4165b31e1552SEric Sandeen "bad superblock"); 4166ac27a0ecSDave Kleikamp brelse(bh); 4167ac27a0ecSDave Kleikamp goto out_bdev; 4168ac27a0ecSDave Kleikamp } 4169ac27a0ecSDave Kleikamp 4170df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 4171df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 4172df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 4173df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 4174df4763beSDarrick J. Wong "corrupt superblock"); 4175df4763beSDarrick J. Wong brelse(bh); 4176df4763beSDarrick J. Wong goto out_bdev; 4177df4763beSDarrick J. Wong } 4178df4763beSDarrick J. Wong 4179617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4180b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4181ac27a0ecSDave Kleikamp brelse(bh); 4182ac27a0ecSDave Kleikamp goto out_bdev; 4183ac27a0ecSDave Kleikamp } 4184ac27a0ecSDave Kleikamp 4185bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4186ac27a0ecSDave Kleikamp start = sb_block + 1; 4187ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4188ac27a0ecSDave Kleikamp 4189dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4190ac27a0ecSDave Kleikamp start, len, blocksize); 4191ac27a0ecSDave Kleikamp if (!journal) { 4192b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4193ac27a0ecSDave Kleikamp goto out_bdev; 4194ac27a0ecSDave Kleikamp } 4195ac27a0ecSDave Kleikamp journal->j_private = sb; 41969f203507STheodore Ts'o ll_rw_block(READ | REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); 4197ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4198ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4199b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4200ac27a0ecSDave Kleikamp goto out_journal; 4201ac27a0ecSDave Kleikamp } 4202ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4203b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4204b31e1552SEric Sandeen "user (unsupported) - %d", 4205ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4206ac27a0ecSDave Kleikamp goto out_journal; 4207ac27a0ecSDave Kleikamp } 4208617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4209617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4210ac27a0ecSDave Kleikamp return journal; 42110b8e58a1SAndreas Dilger 4212ac27a0ecSDave Kleikamp out_journal: 4213dab291afSMingming Cao jbd2_journal_destroy(journal); 4214ac27a0ecSDave Kleikamp out_bdev: 4215617ba13bSMingming Cao ext4_blkdev_put(bdev); 4216ac27a0ecSDave Kleikamp return NULL; 4217ac27a0ecSDave Kleikamp } 4218ac27a0ecSDave Kleikamp 4219617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4220617ba13bSMingming Cao struct ext4_super_block *es, 4221ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4222ac27a0ecSDave Kleikamp { 4223ac27a0ecSDave Kleikamp journal_t *journal; 4224ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4225ac27a0ecSDave Kleikamp dev_t journal_dev; 4226ac27a0ecSDave Kleikamp int err = 0; 4227ac27a0ecSDave Kleikamp int really_read_only; 4228ac27a0ecSDave Kleikamp 4229e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 42300390131bSFrank Mayhar 4231ac27a0ecSDave Kleikamp if (journal_devnum && 4232ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4233b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4234b31e1552SEric Sandeen "numbers have changed"); 4235ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4236ac27a0ecSDave Kleikamp } else 4237ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4238ac27a0ecSDave Kleikamp 4239ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4240ac27a0ecSDave Kleikamp 4241ac27a0ecSDave Kleikamp /* 4242ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4243ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4244ac27a0ecSDave Kleikamp * can get read-write access to the device. 4245ac27a0ecSDave Kleikamp */ 4246e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 4247ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4248b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4249b31e1552SEric Sandeen "required on readonly filesystem"); 4250ac27a0ecSDave Kleikamp if (really_read_only) { 4251b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4252b31e1552SEric Sandeen "unavailable, cannot proceed"); 4253ac27a0ecSDave Kleikamp return -EROFS; 4254ac27a0ecSDave Kleikamp } 4255b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4256b31e1552SEric Sandeen "be enabled during recovery"); 4257ac27a0ecSDave Kleikamp } 4258ac27a0ecSDave Kleikamp } 4259ac27a0ecSDave Kleikamp 4260ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4261b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4262b31e1552SEric Sandeen "and inode journals!"); 4263ac27a0ecSDave Kleikamp return -EINVAL; 4264ac27a0ecSDave Kleikamp } 4265ac27a0ecSDave Kleikamp 4266ac27a0ecSDave Kleikamp if (journal_inum) { 4267617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4268ac27a0ecSDave Kleikamp return -EINVAL; 4269ac27a0ecSDave Kleikamp } else { 4270617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4271ac27a0ecSDave Kleikamp return -EINVAL; 4272ac27a0ecSDave Kleikamp } 4273ac27a0ecSDave Kleikamp 427490576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4275b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 42764776004fSTheodore Ts'o 4277e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 4278dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 42791c13d5c0STheodore Ts'o if (!err) { 42801c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 42811c13d5c0STheodore Ts'o if (save) 42821c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 42831c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4284dab291afSMingming Cao err = jbd2_journal_load(journal); 42851c13d5c0STheodore Ts'o if (save) 42861c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 42871c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 42881c13d5c0STheodore Ts'o kfree(save); 42891c13d5c0STheodore Ts'o } 4290ac27a0ecSDave Kleikamp 4291ac27a0ecSDave Kleikamp if (err) { 4292b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4293dab291afSMingming Cao jbd2_journal_destroy(journal); 4294ac27a0ecSDave Kleikamp return err; 4295ac27a0ecSDave Kleikamp } 4296ac27a0ecSDave Kleikamp 4297617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4298617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4299ac27a0ecSDave Kleikamp 4300c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4301ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4302ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4303ac27a0ecSDave Kleikamp 4304ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4305e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4306ac27a0ecSDave Kleikamp } 4307ac27a0ecSDave Kleikamp 4308ac27a0ecSDave Kleikamp return 0; 4309ac27a0ecSDave Kleikamp } 4310ac27a0ecSDave Kleikamp 4311e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4312ac27a0ecSDave Kleikamp { 4313e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4314617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4315c4be0c1dSTakashi Sato int error = 0; 4316ac27a0ecSDave Kleikamp 4317bdfe0cbdSTheodore Ts'o if (!sbh || block_device_ejected(sb)) 4318c4be0c1dSTakashi Sato return error; 4319914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 4320914258bfSTheodore Ts'o /* 4321914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 4322914258bfSTheodore Ts'o * superblock failed. This could happen because the 4323914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 4324914258bfSTheodore Ts'o * be a transient write error and maybe the block will 4325914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 4326914258bfSTheodore Ts'o * write and hope for the best. 4327914258bfSTheodore Ts'o */ 4328b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 4329b31e1552SEric Sandeen "superblock detected"); 4330914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4331914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4332914258bfSTheodore Ts'o } 433371290b36STheodore Ts'o /* 433471290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 433571290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 433671290b36STheodore Ts'o * write time when we are mounting the root file system 433771290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 433871290b36STheodore Ts'o * for people who are east of GMT and who make their clock 433971290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 434071290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 434171290b36STheodore Ts'o * to complain and force a full file system check. 434271290b36STheodore Ts'o */ 434371290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4344ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4345f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4346afc32f7eSTheodore Ts'o es->s_kbytes_written = 4347afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4348afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4349afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4350f613dfcbSTheodore Ts'o else 4351f613dfcbSTheodore Ts'o es->s_kbytes_written = 4352f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 4353d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) 435457042651STheodore Ts'o ext4_free_blocks_count_set(es, 435557042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 435657042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 4357d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) 43587f93cff9STheodore Ts'o es->s_free_inodes_count = 43597f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 43605d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4361ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 436206db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 4363ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4364914258bfSTheodore Ts'o if (sync) { 4365564bc402SDaeho Jeong error = __sync_dirty_buffer(sbh, 4366564bc402SDaeho Jeong test_opt(sb, BARRIER) ? WRITE_FUA : WRITE_SYNC); 4367c4be0c1dSTakashi Sato if (error) 4368c4be0c1dSTakashi Sato return error; 4369c4be0c1dSTakashi Sato 4370c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4371c4be0c1dSTakashi Sato if (error) { 4372b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4373b31e1552SEric Sandeen "superblock"); 4374914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4375914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4376914258bfSTheodore Ts'o } 4377914258bfSTheodore Ts'o } 4378c4be0c1dSTakashi Sato return error; 4379ac27a0ecSDave Kleikamp } 4380ac27a0ecSDave Kleikamp 4381ac27a0ecSDave Kleikamp /* 4382ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4383ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4384ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4385ac27a0ecSDave Kleikamp */ 4386617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4387617ba13bSMingming Cao struct ext4_super_block *es) 4388ac27a0ecSDave Kleikamp { 4389617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4390ac27a0ecSDave Kleikamp 4391e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 43920390131bSFrank Mayhar BUG_ON(journal != NULL); 43930390131bSFrank Mayhar return; 43940390131bSFrank Mayhar } 4395dab291afSMingming Cao jbd2_journal_lock_updates(journal); 43967ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 43977ffe1ea8SHidehiro Kawai goto out; 43987ffe1ea8SHidehiro Kawai 4399e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb) && 4400ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4401e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 4402e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4403ac27a0ecSDave Kleikamp } 44047ffe1ea8SHidehiro Kawai 44057ffe1ea8SHidehiro Kawai out: 4406dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4407ac27a0ecSDave Kleikamp } 4408ac27a0ecSDave Kleikamp 4409ac27a0ecSDave Kleikamp /* 4410ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4411ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4412ac27a0ecSDave Kleikamp * main filesystem now. 4413ac27a0ecSDave Kleikamp */ 4414617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4415617ba13bSMingming Cao struct ext4_super_block *es) 4416ac27a0ecSDave Kleikamp { 4417ac27a0ecSDave Kleikamp journal_t *journal; 4418ac27a0ecSDave Kleikamp int j_errno; 4419ac27a0ecSDave Kleikamp const char *errstr; 4420ac27a0ecSDave Kleikamp 4421e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 44220390131bSFrank Mayhar 4423617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4424ac27a0ecSDave Kleikamp 4425ac27a0ecSDave Kleikamp /* 4426ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4427617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4428ac27a0ecSDave Kleikamp */ 4429ac27a0ecSDave Kleikamp 4430dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4431ac27a0ecSDave Kleikamp if (j_errno) { 4432ac27a0ecSDave Kleikamp char nbuf[16]; 4433ac27a0ecSDave Kleikamp 4434617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 443512062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4436ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 443712062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4438ac27a0ecSDave Kleikamp 4439617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4440617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4441e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4442ac27a0ecSDave Kleikamp 4443dab291afSMingming Cao jbd2_journal_clear_err(journal); 4444d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4445ac27a0ecSDave Kleikamp } 4446ac27a0ecSDave Kleikamp } 4447ac27a0ecSDave Kleikamp 4448ac27a0ecSDave Kleikamp /* 4449ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4450ac27a0ecSDave Kleikamp * and wait on the commit. 4451ac27a0ecSDave Kleikamp */ 4452617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4453ac27a0ecSDave Kleikamp { 4454ac27a0ecSDave Kleikamp journal_t *journal; 4455ac27a0ecSDave Kleikamp 4456ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4457ac27a0ecSDave Kleikamp return 0; 4458ac27a0ecSDave Kleikamp 4459617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4460b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 4461ac27a0ecSDave Kleikamp } 4462ac27a0ecSDave Kleikamp 4463617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4464ac27a0ecSDave Kleikamp { 446514ce0cb4STheodore Ts'o int ret = 0; 44669eddacf9SJan Kara tid_t target; 446706a407f1SDmitry Monakhov bool needs_barrier = false; 44688d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4469ac27a0ecSDave Kleikamp 44709bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 44712e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 4472a1177825SJan Kara /* 4473a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4474a1177825SJan Kara * no dirty dquots 4475a1177825SJan Kara */ 4476a1177825SJan Kara dquot_writeback_dquots(sb, -1); 447706a407f1SDmitry Monakhov /* 447806a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 447906a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 448006a407f1SDmitry Monakhov * transaction_commit will do it for us. 448106a407f1SDmitry Monakhov */ 4482bda32530STheodore Ts'o if (sbi->s_journal) { 448306a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 448406a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 448506a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 448606a407f1SDmitry Monakhov needs_barrier = true; 448706a407f1SDmitry Monakhov 44888d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4489ac27a0ecSDave Kleikamp if (wait) 4490bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 4491bda32530STheodore Ts'o target); 44920390131bSFrank Mayhar } 4493bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 4494bda32530STheodore Ts'o needs_barrier = true; 449506a407f1SDmitry Monakhov if (needs_barrier) { 449606a407f1SDmitry Monakhov int err; 449706a407f1SDmitry Monakhov err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 449806a407f1SDmitry Monakhov if (!ret) 449906a407f1SDmitry Monakhov ret = err; 450006a407f1SDmitry Monakhov } 450106a407f1SDmitry Monakhov 450206a407f1SDmitry Monakhov return ret; 450306a407f1SDmitry Monakhov } 450406a407f1SDmitry Monakhov 4505ac27a0ecSDave Kleikamp /* 4506ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4507ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4508be4f27d3SYongqiang Yang * 4509be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 45108e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 45118e8ad8a5SJan Kara * modifications. 4512ac27a0ecSDave Kleikamp */ 4513c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4514ac27a0ecSDave Kleikamp { 4515c4be0c1dSTakashi Sato int error = 0; 4516c4be0c1dSTakashi Sato journal_t *journal; 4517ac27a0ecSDave Kleikamp 45189ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 45199ca92389STheodore Ts'o return 0; 45209ca92389STheodore Ts'o 4521c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4522ac27a0ecSDave Kleikamp 4523bb044576STheodore Ts'o if (journal) { 4524ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4525dab291afSMingming Cao jbd2_journal_lock_updates(journal); 45267ffe1ea8SHidehiro Kawai 45277ffe1ea8SHidehiro Kawai /* 4528bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 4529bb044576STheodore Ts'o * flush the journal. 45307ffe1ea8SHidehiro Kawai */ 4531c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 45326b0310fbSEric Sandeen if (error < 0) 45336b0310fbSEric Sandeen goto out; 4534ac27a0ecSDave Kleikamp 4535ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4536e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 4537c642dc9eSEric Sandeen } 4538c642dc9eSEric Sandeen 4539e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 45406b0310fbSEric Sandeen out: 4541bb044576STheodore Ts'o if (journal) 45428e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 4543bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 45446b0310fbSEric Sandeen return error; 4545ac27a0ecSDave Kleikamp } 4546ac27a0ecSDave Kleikamp 4547ac27a0ecSDave Kleikamp /* 4548ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4549ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4550ac27a0ecSDave Kleikamp */ 4551c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4552ac27a0ecSDave Kleikamp { 45539ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 45549ca92389STheodore Ts'o return 0; 45559ca92389STheodore Ts'o 4556c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 45579ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4558e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 4559c642dc9eSEric Sandeen } 4560c642dc9eSEric Sandeen 4561e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4562c4be0c1dSTakashi Sato return 0; 4563ac27a0ecSDave Kleikamp } 4564ac27a0ecSDave Kleikamp 4565673c6100STheodore Ts'o /* 4566673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4567673c6100STheodore Ts'o */ 4568673c6100STheodore Ts'o struct ext4_mount_options { 4569673c6100STheodore Ts'o unsigned long s_mount_opt; 4570a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 457108cefc7aSEric W. Biederman kuid_t s_resuid; 457208cefc7aSEric W. Biederman kgid_t s_resgid; 4573673c6100STheodore Ts'o unsigned long s_commit_interval; 4574673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4575673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4576673c6100STheodore Ts'o int s_jquota_fmt; 4577a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 4578673c6100STheodore Ts'o #endif 4579673c6100STheodore Ts'o }; 4580673c6100STheodore Ts'o 4581617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4582ac27a0ecSDave Kleikamp { 4583617ba13bSMingming Cao struct ext4_super_block *es; 4584617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4585ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4586617ba13bSMingming Cao struct ext4_mount_options old_opts; 4587c79d967dSChristoph Hellwig int enable_quota = 0; 45888a266467STheodore Ts'o ext4_group_t g; 4589b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4590c5e06d10SJohann Lombardi int err = 0; 4591ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 459203dafb5fSChen Gang int i, j; 4593ac27a0ecSDave Kleikamp #endif 4594d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4595ac27a0ecSDave Kleikamp 4596ac27a0ecSDave Kleikamp /* Store the original options */ 4597ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4598ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4599a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4600ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4601ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4602ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 460330773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 460430773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4605ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4606ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4607a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 460803dafb5fSChen Gang if (sbi->s_qf_names[i]) { 460903dafb5fSChen Gang old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], 461003dafb5fSChen Gang GFP_KERNEL); 461103dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 461203dafb5fSChen Gang for (j = 0; j < i; j++) 461303dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 46143e36a163SWei Yongjun kfree(orig_data); 461503dafb5fSChen Gang return -ENOMEM; 461603dafb5fSChen Gang } 461703dafb5fSChen Gang } else 461803dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 4619ac27a0ecSDave Kleikamp #endif 4620b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4621b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4622ac27a0ecSDave Kleikamp 4623661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4624ac27a0ecSDave Kleikamp err = -EINVAL; 4625ac27a0ecSDave Kleikamp goto restore_opts; 4626ac27a0ecSDave Kleikamp } 4627ac27a0ecSDave Kleikamp 46286b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 46296b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 46306b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 46312d5b86e0SEric Sandeen "during remount not supported; ignoring"); 46322d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 4633c6d3d56dSDarrick J. Wong } 4634c6d3d56dSDarrick J. Wong 46356ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 46366ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 46376ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 46386ae6514bSPiotr Sarna "both data=journal and delalloc"); 46396ae6514bSPiotr Sarna err = -EINVAL; 46406ae6514bSPiotr Sarna goto restore_opts; 46416ae6514bSPiotr Sarna } 46426ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 46436ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 46446ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 46456ae6514bSPiotr Sarna err = -EINVAL; 46466ae6514bSPiotr Sarna goto restore_opts; 46476ae6514bSPiotr Sarna } 4648923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 4649923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 4650923ae0ffSRoss Zwisler "both data=journal and dax"); 4651923ae0ffSRoss Zwisler err = -EINVAL; 4652923ae0ffSRoss Zwisler goto restore_opts; 4653923ae0ffSRoss Zwisler } 4654923ae0ffSRoss Zwisler } 4655923ae0ffSRoss Zwisler 4656923ae0ffSRoss Zwisler if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { 4657923ae0ffSRoss Zwisler ext4_msg(sb, KERN_WARNING, "warning: refusing change of " 4658923ae0ffSRoss Zwisler "dax flag with busy inodes while remounting"); 4659923ae0ffSRoss Zwisler sbi->s_mount_opt ^= EXT4_MOUNT_DAX; 46606ae6514bSPiotr Sarna } 46616ae6514bSPiotr Sarna 46624ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4663c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4664ac27a0ecSDave Kleikamp 4665ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4666482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4667ac27a0ecSDave Kleikamp 4668ac27a0ecSDave Kleikamp es = sbi->s_es; 4669ac27a0ecSDave Kleikamp 4670b3881f74STheodore Ts'o if (sbi->s_journal) { 4671617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4672b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4673b3881f74STheodore Ts'o } 4674ac27a0ecSDave Kleikamp 4675a2fd66d0STheodore Ts'o if (*flags & MS_LAZYTIME) 4676a2fd66d0STheodore Ts'o sb->s_flags |= MS_LAZYTIME; 4677a2fd66d0STheodore Ts'o 4678661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 46794ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4680ac27a0ecSDave Kleikamp err = -EROFS; 4681ac27a0ecSDave Kleikamp goto restore_opts; 4682ac27a0ecSDave Kleikamp } 4683ac27a0ecSDave Kleikamp 4684ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 468538c03b34STheodore Ts'o err = sync_filesystem(sb); 468638c03b34STheodore Ts'o if (err < 0) 468738c03b34STheodore Ts'o goto restore_opts; 46880f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 46890f0dd62fSChristoph Hellwig if (err < 0) 4690c79d967dSChristoph Hellwig goto restore_opts; 4691c79d967dSChristoph Hellwig 4692ac27a0ecSDave Kleikamp /* 4693ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4694ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4695ac27a0ecSDave Kleikamp */ 4696ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4697ac27a0ecSDave Kleikamp 4698ac27a0ecSDave Kleikamp /* 4699ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4700ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4701ac27a0ecSDave Kleikamp * mark the partition as valid again. 4702ac27a0ecSDave Kleikamp */ 4703617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4704617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4705ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4706ac27a0ecSDave Kleikamp 4707a63c9eb2STheodore Ts'o if (sbi->s_journal) 4708617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4709ac27a0ecSDave Kleikamp } else { 4710a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4711e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 47122cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 4713ac27a0ecSDave Kleikamp err = -EROFS; 4714ac27a0ecSDave Kleikamp goto restore_opts; 4715ac27a0ecSDave Kleikamp } 4716ead6596bSEric Sandeen /* 47178a266467STheodore Ts'o * Make sure the group descriptor checksums 47180b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 47198a266467STheodore Ts'o */ 47208a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 47218a266467STheodore Ts'o struct ext4_group_desc *gdp = 47228a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 47238a266467STheodore Ts'o 4724feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 4725b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4726b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 4727e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 47288a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 47296a797d27SDarrick J. Wong err = -EFSBADCRC; 47308a266467STheodore Ts'o goto restore_opts; 47318a266467STheodore Ts'o } 47328a266467STheodore Ts'o } 47338a266467STheodore Ts'o 47348a266467STheodore Ts'o /* 4735ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4736ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4737ead6596bSEric Sandeen * require a full umount/remount for now. 4738ead6596bSEric Sandeen */ 4739ead6596bSEric Sandeen if (es->s_last_orphan) { 4740b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4741ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4742ead6596bSEric Sandeen "orphan inode list. Please " 4743b31e1552SEric Sandeen "umount/remount instead"); 4744ead6596bSEric Sandeen err = -EINVAL; 4745ead6596bSEric Sandeen goto restore_opts; 4746ead6596bSEric Sandeen } 4747ead6596bSEric Sandeen 4748ac27a0ecSDave Kleikamp /* 4749ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4750ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4751ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4752ac27a0ecSDave Kleikamp * the partition.) 4753ac27a0ecSDave Kleikamp */ 47540390131bSFrank Mayhar if (sbi->s_journal) 4755617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4756ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4757617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4758ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4759e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 4760c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 4761c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 4762c5e06d10SJohann Lombardi err = -EROFS; 4763c5e06d10SJohann Lombardi goto restore_opts; 4764c5e06d10SJohann Lombardi } 4765c79d967dSChristoph Hellwig enable_quota = 1; 4766ac27a0ecSDave Kleikamp } 4767ac27a0ecSDave Kleikamp } 4768bfff6873SLukas Czerner 4769bfff6873SLukas Czerner /* 4770bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4771bfff6873SLukas Czerner * current settings 4772bfff6873SLukas Czerner */ 4773bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4774bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4775bfff6873SLukas Czerner else { 4776bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4777bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4778bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4779bfff6873SLukas Czerner } 4780bfff6873SLukas Czerner 47816fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 4782d096ad0fSMichael Tokarev if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) 4783e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 47840390131bSFrank Mayhar 4785ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4786ac27a0ecSDave Kleikamp /* Release old quota file names */ 4787a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4788ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 47897c319d32SAditya Kali if (enable_quota) { 47907c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 47910f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 4792e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 47937c319d32SAditya Kali err = ext4_enable_quotas(sb); 479407724f98STheodore Ts'o if (err) 47957c319d32SAditya Kali goto restore_opts; 47967c319d32SAditya Kali } 47977c319d32SAditya Kali } 47987c319d32SAditya Kali #endif 4799d4c402d9SCurt Wohlgemuth 4800a26f4992STheodore Ts'o *flags = (*flags & ~MS_LAZYTIME) | (sb->s_flags & MS_LAZYTIME); 4801d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 4802d4c402d9SCurt Wohlgemuth kfree(orig_data); 4803ac27a0ecSDave Kleikamp return 0; 48040b8e58a1SAndreas Dilger 4805ac27a0ecSDave Kleikamp restore_opts: 4806ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 4807ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 4808a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 4809ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 4810ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 4811ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 481230773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 481330773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 4814ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4815ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 4816a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 4817ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4818ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 4819ac27a0ecSDave Kleikamp } 4820ac27a0ecSDave Kleikamp #endif 4821d4c402d9SCurt Wohlgemuth kfree(orig_data); 4822ac27a0ecSDave Kleikamp return err; 4823ac27a0ecSDave Kleikamp } 4824ac27a0ecSDave Kleikamp 4825617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 4826ac27a0ecSDave Kleikamp { 4827ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 4828617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4829617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 483027dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 4831960cc398SPekka Enberg u64 fsid; 4832d02a9391SKazuya Mio s64 bfree; 483327dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 4834ac27a0ecSDave Kleikamp 4835952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 4836952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 4837ac27a0ecSDave Kleikamp 4838617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 4839ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 4840b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 484157042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 484257042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 4843d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 484457042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 484527dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 484627dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 484727dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 4848ac27a0ecSDave Kleikamp buf->f_bavail = 0; 4849ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 485052d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 4851617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 4852960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 4853960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 4854960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 4855960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 48560b8e58a1SAndreas Dilger 4857ac27a0ecSDave Kleikamp return 0; 4858ac27a0ecSDave Kleikamp } 4859ac27a0ecSDave Kleikamp 48600b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 48610b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 4862ac27a0ecSDave Kleikamp * Process 1 Process 2 4863617ba13bSMingming Cao * ext4_create() quota_sync() 4864dab291afSMingming Cao * jbd2_journal_start() write_dquot() 4865871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 4866dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 4867ac27a0ecSDave Kleikamp * 4868ac27a0ecSDave Kleikamp */ 4869ac27a0ecSDave Kleikamp 4870ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4871ac27a0ecSDave Kleikamp 4872ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 4873ac27a0ecSDave Kleikamp { 48744c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 4875ac27a0ecSDave Kleikamp } 4876ac27a0ecSDave Kleikamp 4877617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 4878ac27a0ecSDave Kleikamp { 4879ac27a0ecSDave Kleikamp int ret, err; 4880ac27a0ecSDave Kleikamp handle_t *handle; 4881ac27a0ecSDave Kleikamp struct inode *inode; 4882ac27a0ecSDave Kleikamp 4883ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 48849924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 4885617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 4886ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4887ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4888ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 4889617ba13bSMingming Cao err = ext4_journal_stop(handle); 4890ac27a0ecSDave Kleikamp if (!ret) 4891ac27a0ecSDave Kleikamp ret = err; 4892ac27a0ecSDave Kleikamp return ret; 4893ac27a0ecSDave Kleikamp } 4894ac27a0ecSDave Kleikamp 4895617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 4896ac27a0ecSDave Kleikamp { 4897ac27a0ecSDave Kleikamp int ret, err; 4898ac27a0ecSDave Kleikamp handle_t *handle; 4899ac27a0ecSDave Kleikamp 49009924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 4901617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 4902ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4903ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4904ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 4905617ba13bSMingming Cao err = ext4_journal_stop(handle); 4906ac27a0ecSDave Kleikamp if (!ret) 4907ac27a0ecSDave Kleikamp ret = err; 4908ac27a0ecSDave Kleikamp return ret; 4909ac27a0ecSDave Kleikamp } 4910ac27a0ecSDave Kleikamp 4911617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 4912ac27a0ecSDave Kleikamp { 4913ac27a0ecSDave Kleikamp int ret, err; 4914ac27a0ecSDave Kleikamp handle_t *handle; 4915ac27a0ecSDave Kleikamp 49169924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 4917617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 49189c3013e9SJan Kara if (IS_ERR(handle)) { 49199c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 49209c3013e9SJan Kara dquot_release(dquot); 4921ac27a0ecSDave Kleikamp return PTR_ERR(handle); 49229c3013e9SJan Kara } 4923ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 4924617ba13bSMingming Cao err = ext4_journal_stop(handle); 4925ac27a0ecSDave Kleikamp if (!ret) 4926ac27a0ecSDave Kleikamp ret = err; 4927ac27a0ecSDave Kleikamp return ret; 4928ac27a0ecSDave Kleikamp } 4929ac27a0ecSDave Kleikamp 4930617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 4931ac27a0ecSDave Kleikamp { 4932262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 4933262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 4934262b4662SJan Kara 49352c8be6b2SJan Kara /* Are we journaling quotas? */ 4936e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) || 4937262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 4938ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 4939617ba13bSMingming Cao return ext4_write_dquot(dquot); 4940ac27a0ecSDave Kleikamp } else { 4941ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 4942ac27a0ecSDave Kleikamp } 4943ac27a0ecSDave Kleikamp } 4944ac27a0ecSDave Kleikamp 4945617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 4946ac27a0ecSDave Kleikamp { 4947ac27a0ecSDave Kleikamp int ret, err; 4948ac27a0ecSDave Kleikamp handle_t *handle; 4949ac27a0ecSDave Kleikamp 4950ac27a0ecSDave Kleikamp /* Data block + inode block */ 49512b0143b5SDavid Howells handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); 4952ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4953ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4954ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 4955617ba13bSMingming Cao err = ext4_journal_stop(handle); 4956ac27a0ecSDave Kleikamp if (!ret) 4957ac27a0ecSDave Kleikamp ret = err; 4958ac27a0ecSDave Kleikamp return ret; 4959ac27a0ecSDave Kleikamp } 4960ac27a0ecSDave Kleikamp 4961ac27a0ecSDave Kleikamp /* 4962ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 4963ac27a0ecSDave Kleikamp * the quota file and such... 4964ac27a0ecSDave Kleikamp */ 4965617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 4966ac27a0ecSDave Kleikamp { 4967287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 4968617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 4969ac27a0ecSDave Kleikamp } 4970ac27a0ecSDave Kleikamp 4971ac27a0ecSDave Kleikamp /* 4972ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 4973ac27a0ecSDave Kleikamp */ 4974617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 4975f00c9e44SJan Kara struct path *path) 4976ac27a0ecSDave Kleikamp { 4977ac27a0ecSDave Kleikamp int err; 4978ac27a0ecSDave Kleikamp 4979ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 4980ac27a0ecSDave Kleikamp return -EINVAL; 49810623543bSJan Kara 4982ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 4983d8c9584eSAl Viro if (path->dentry->d_sb != sb) 4984ac27a0ecSDave Kleikamp return -EXDEV; 49850623543bSJan Kara /* Journaling quota? */ 49860623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 49872b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 4988f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 4989b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4990b31e1552SEric Sandeen "Quota file not on filesystem root. " 4991b31e1552SEric Sandeen "Journaled quota will not work"); 49920623543bSJan Kara } 49930623543bSJan Kara 49940623543bSJan Kara /* 49950623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 49960623543bSJan Kara * all updates to the file when we bypass pagecache... 49970623543bSJan Kara */ 49980390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 49992b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 50000623543bSJan Kara /* 50010623543bSJan Kara * We don't need to lock updates but journal_flush() could 50020623543bSJan Kara * otherwise be livelocked... 50030623543bSJan Kara */ 50040623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 50057ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 50060623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 5007f00c9e44SJan Kara if (err) 50087ffe1ea8SHidehiro Kawai return err; 50097ffe1ea8SHidehiro Kawai } 50100623543bSJan Kara 5011f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 5012ac27a0ecSDave Kleikamp } 5013ac27a0ecSDave Kleikamp 50147c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 50157c319d32SAditya Kali unsigned int flags) 50167c319d32SAditya Kali { 50177c319d32SAditya Kali int err; 50187c319d32SAditya Kali struct inode *qf_inode; 5019a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 50207c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 50217c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 50227c319d32SAditya Kali }; 50237c319d32SAditya Kali 5024e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 50257c319d32SAditya Kali 50267c319d32SAditya Kali if (!qf_inums[type]) 50277c319d32SAditya Kali return -EPERM; 50287c319d32SAditya Kali 50297c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 50307c319d32SAditya Kali if (IS_ERR(qf_inode)) { 50317c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 50327c319d32SAditya Kali return PTR_ERR(qf_inode); 50337c319d32SAditya Kali } 50347c319d32SAditya Kali 5035bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 5036bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 50377c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 50387c319d32SAditya Kali iput(qf_inode); 50397c319d32SAditya Kali 50407c319d32SAditya Kali return err; 50417c319d32SAditya Kali } 50427c319d32SAditya Kali 50437c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 50447c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 50457c319d32SAditya Kali { 50467c319d32SAditya Kali int type, err = 0; 5047a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 50487c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 50497c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 50507c319d32SAditya Kali }; 50517c319d32SAditya Kali 50527c319d32SAditya Kali sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; 5053a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 50547c319d32SAditya Kali if (qf_inums[type]) { 50557c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 50567c319d32SAditya Kali DQUOT_USAGE_ENABLED); 50577c319d32SAditya Kali if (err) { 50587c319d32SAditya Kali ext4_warning(sb, 505972ba7450STheodore Ts'o "Failed to enable quota tracking " 506072ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 506172ba7450STheodore Ts'o "e2fsck to fix.", type, err); 50627c319d32SAditya Kali return err; 50637c319d32SAditya Kali } 50647c319d32SAditya Kali } 50657c319d32SAditya Kali } 50667c319d32SAditya Kali return 0; 50677c319d32SAditya Kali } 50687c319d32SAditya Kali 5069ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5070ca0e05e4SDmitry Monakhov { 507121f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 507221f97697SJan Kara handle_t *handle; 507321f97697SJan Kara 507487009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 507587009d86SDmitry Monakhov * Caller already holds s_umount sem */ 507687009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5077ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5078ca0e05e4SDmitry Monakhov 50790b268590SAmir Goldstein if (!inode) 50800b268590SAmir Goldstein goto out; 50810b268590SAmir Goldstein 508221f97697SJan Kara /* Update modification times of quota files when userspace can 508321f97697SJan Kara * start looking at them */ 50849924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 508521f97697SJan Kara if (IS_ERR(handle)) 508621f97697SJan Kara goto out; 508721f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 508821f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 508921f97697SJan Kara ext4_journal_stop(handle); 509021f97697SJan Kara 509121f97697SJan Kara out: 5092ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5093ca0e05e4SDmitry Monakhov } 5094ca0e05e4SDmitry Monakhov 5095ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5096ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5097ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5098ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5099617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5100ac27a0ecSDave Kleikamp size_t len, loff_t off) 5101ac27a0ecSDave Kleikamp { 5102ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5103725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5104ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5105ac27a0ecSDave Kleikamp int tocopy; 5106ac27a0ecSDave Kleikamp size_t toread; 5107ac27a0ecSDave Kleikamp struct buffer_head *bh; 5108ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5109ac27a0ecSDave Kleikamp 5110ac27a0ecSDave Kleikamp if (off > i_size) 5111ac27a0ecSDave Kleikamp return 0; 5112ac27a0ecSDave Kleikamp if (off+len > i_size) 5113ac27a0ecSDave Kleikamp len = i_size-off; 5114ac27a0ecSDave Kleikamp toread = len; 5115ac27a0ecSDave Kleikamp while (toread > 0) { 5116ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5117ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 51181c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 51191c215028STheodore Ts'o if (IS_ERR(bh)) 51201c215028STheodore Ts'o return PTR_ERR(bh); 5121ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5122ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5123ac27a0ecSDave Kleikamp else 5124ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5125ac27a0ecSDave Kleikamp brelse(bh); 5126ac27a0ecSDave Kleikamp offset = 0; 5127ac27a0ecSDave Kleikamp toread -= tocopy; 5128ac27a0ecSDave Kleikamp data += tocopy; 5129ac27a0ecSDave Kleikamp blk++; 5130ac27a0ecSDave Kleikamp } 5131ac27a0ecSDave Kleikamp return len; 5132ac27a0ecSDave Kleikamp } 5133ac27a0ecSDave Kleikamp 5134ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5135ac27a0ecSDave Kleikamp * enough credits) */ 5136617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5137ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5138ac27a0ecSDave Kleikamp { 5139ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5140725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 51411c215028STheodore Ts'o int err, offset = off & (sb->s_blocksize - 1); 5142c5e298aeSTheodore Ts'o int retries = 0; 5143ac27a0ecSDave Kleikamp struct buffer_head *bh; 5144ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5145ac27a0ecSDave Kleikamp 51460390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5147b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5148b31e1552SEric Sandeen " cancelled because transaction is not started", 51499c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 51509c3013e9SJan Kara return -EIO; 51519c3013e9SJan Kara } 515267eeb568SDmitry Monakhov /* 515367eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 515467eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 515567eeb568SDmitry Monakhov */ 515667eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 515767eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 515867eeb568SDmitry Monakhov " cancelled because not block aligned", 515967eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 516067eeb568SDmitry Monakhov return -EIO; 516167eeb568SDmitry Monakhov } 516267eeb568SDmitry Monakhov 5163c5e298aeSTheodore Ts'o do { 5164c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 5165c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 5166c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 5167c5e298aeSTheodore Ts'o } while (IS_ERR(bh) && (PTR_ERR(bh) == -ENOSPC) && 5168c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 51691c215028STheodore Ts'o if (IS_ERR(bh)) 51701c215028STheodore Ts'o return PTR_ERR(bh); 5171ac27a0ecSDave Kleikamp if (!bh) 5172ac27a0ecSDave Kleikamp goto out; 51735d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 5174617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5175ac27a0ecSDave Kleikamp if (err) { 5176ac27a0ecSDave Kleikamp brelse(bh); 51771c215028STheodore Ts'o return err; 5178ac27a0ecSDave Kleikamp } 5179ac27a0ecSDave Kleikamp lock_buffer(bh); 518067eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5181ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5182ac27a0ecSDave Kleikamp unlock_buffer(bh); 51830390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5184ac27a0ecSDave Kleikamp brelse(bh); 5185ac27a0ecSDave Kleikamp out: 518667eeb568SDmitry Monakhov if (inode->i_size < off + len) { 518767eeb568SDmitry Monakhov i_size_write(inode, off + len); 5188617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5189617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 519021f97697SJan Kara } 519167eeb568SDmitry Monakhov return len; 5192ac27a0ecSDave Kleikamp } 5193ac27a0ecSDave Kleikamp 5194ac27a0ecSDave Kleikamp #endif 5195ac27a0ecSDave Kleikamp 5196152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5197152a0836SAl Viro const char *dev_name, void *data) 5198ac27a0ecSDave Kleikamp { 5199152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5200ac27a0ecSDave Kleikamp } 5201ac27a0ecSDave Kleikamp 5202c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 520324b58424STheodore Ts'o static inline void register_as_ext2(void) 520424b58424STheodore Ts'o { 520524b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 520624b58424STheodore Ts'o if (err) 520724b58424STheodore Ts'o printk(KERN_WARNING 520824b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 520924b58424STheodore Ts'o } 521024b58424STheodore Ts'o 521124b58424STheodore Ts'o static inline void unregister_as_ext2(void) 521224b58424STheodore Ts'o { 521324b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 521424b58424STheodore Ts'o } 52152035e776STheodore Ts'o 52162035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 52172035e776STheodore Ts'o { 5218e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 52192035e776STheodore Ts'o return 0; 52202035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 52212035e776STheodore Ts'o return 1; 5222e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 52232035e776STheodore Ts'o return 0; 52242035e776STheodore Ts'o return 1; 52252035e776STheodore Ts'o } 522624b58424STheodore Ts'o #else 522724b58424STheodore Ts'o static inline void register_as_ext2(void) { } 522824b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 52292035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 523024b58424STheodore Ts'o #endif 523124b58424STheodore Ts'o 523224b58424STheodore Ts'o static inline void register_as_ext3(void) 523324b58424STheodore Ts'o { 523424b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 523524b58424STheodore Ts'o if (err) 523624b58424STheodore Ts'o printk(KERN_WARNING 523724b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 523824b58424STheodore Ts'o } 523924b58424STheodore Ts'o 524024b58424STheodore Ts'o static inline void unregister_as_ext3(void) 524124b58424STheodore Ts'o { 524224b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 524324b58424STheodore Ts'o } 52442035e776STheodore Ts'o 52452035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 52462035e776STheodore Ts'o { 5247e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 52482035e776STheodore Ts'o return 0; 5249e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 52502035e776STheodore Ts'o return 0; 52512035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 52522035e776STheodore Ts'o return 1; 5253e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 52542035e776STheodore Ts'o return 0; 52552035e776STheodore Ts'o return 1; 52562035e776STheodore Ts'o } 525724b58424STheodore Ts'o 525803010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5259ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 526003010a33STheodore Ts'o .name = "ext4", 5261152a0836SAl Viro .mount = ext4_mount, 5262ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5263ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5264ac27a0ecSDave Kleikamp }; 52657f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 5266ac27a0ecSDave Kleikamp 5267e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5268e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5269e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 5270e9e3bcecSEric Sandeen 52715dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5272ac27a0ecSDave Kleikamp { 5273e9e3bcecSEric Sandeen int i, err; 5274c9de560dSAlex Tomas 5275e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 527607c0c5d8SAl Viro ext4_li_info = NULL; 527707c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 527807c0c5d8SAl Viro 52799a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 528012e9b892SDmitry Monakhov ext4_check_flag_values(); 5281e9e3bcecSEric Sandeen 5282e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 5283e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 5284e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5285e9e3bcecSEric Sandeen } 5286e9e3bcecSEric Sandeen 528751865fdaSZheng Liu err = ext4_init_es(); 52886fd058f7STheodore Ts'o if (err) 52896fd058f7STheodore Ts'o return err; 529051865fdaSZheng Liu 529151865fdaSZheng Liu err = ext4_init_pageio(); 529251865fdaSZheng Liu if (err) 5293b5799018STheodore Ts'o goto out5; 529451865fdaSZheng Liu 52955dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5296bd2d0210STheodore Ts'o if (err) 5297b5799018STheodore Ts'o goto out4; 5298857ac889SLukas Czerner 5299b5799018STheodore Ts'o err = ext4_init_sysfs(); 5300dd68314cSTheodore Ts'o if (err) 5301b5799018STheodore Ts'o goto out3; 5302857ac889SLukas Czerner 53035dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5304ac27a0ecSDave Kleikamp if (err) 5305c9de560dSAlex Tomas goto out2; 53069c191f70ST Makphaibulchoke else 53079c191f70ST Makphaibulchoke ext4_mballoc_ready = 1; 5308ac27a0ecSDave Kleikamp err = init_inodecache(); 5309ac27a0ecSDave Kleikamp if (err) 5310ac27a0ecSDave Kleikamp goto out1; 531124b58424STheodore Ts'o register_as_ext3(); 53122035e776STheodore Ts'o register_as_ext2(); 531303010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5314ac27a0ecSDave Kleikamp if (err) 5315ac27a0ecSDave Kleikamp goto out; 5316bfff6873SLukas Czerner 5317ac27a0ecSDave Kleikamp return 0; 5318ac27a0ecSDave Kleikamp out: 531924b58424STheodore Ts'o unregister_as_ext2(); 532024b58424STheodore Ts'o unregister_as_ext3(); 5321ac27a0ecSDave Kleikamp destroy_inodecache(); 5322ac27a0ecSDave Kleikamp out1: 53239c191f70ST Makphaibulchoke ext4_mballoc_ready = 0; 53245dabfc78STheodore Ts'o ext4_exit_mballoc(); 53259c191f70ST Makphaibulchoke out2: 5326b5799018STheodore Ts'o ext4_exit_sysfs(); 5327b5799018STheodore Ts'o out3: 5328dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5329b5799018STheodore Ts'o out4: 53305dabfc78STheodore Ts'o ext4_exit_pageio(); 5331b5799018STheodore Ts'o out5: 533251865fdaSZheng Liu ext4_exit_es(); 533351865fdaSZheng Liu 5334ac27a0ecSDave Kleikamp return err; 5335ac27a0ecSDave Kleikamp } 5336ac27a0ecSDave Kleikamp 53375dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5338ac27a0ecSDave Kleikamp { 5339e298e73bSChao Yu ext4_exit_crypto(); 5340bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 534124b58424STheodore Ts'o unregister_as_ext2(); 534224b58424STheodore Ts'o unregister_as_ext3(); 534303010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5344ac27a0ecSDave Kleikamp destroy_inodecache(); 53455dabfc78STheodore Ts'o ext4_exit_mballoc(); 5346b5799018STheodore Ts'o ext4_exit_sysfs(); 53475dabfc78STheodore Ts'o ext4_exit_system_zone(); 53485dabfc78STheodore Ts'o ext4_exit_pageio(); 5349dd12ed14SEric Sandeen ext4_exit_es(); 5350ac27a0ecSDave Kleikamp } 5351ac27a0ecSDave Kleikamp 5352ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 535383982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5354ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 53555dabfc78STheodore Ts'o module_init(ext4_init_fs) 53565dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5357