diff options
Diffstat (limited to 'fs/ext4/super.c')
| -rw-r--r-- | fs/ext4/super.c | 69 |
1 files changed, 31 insertions, 38 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index cb1ff47af156..73547d2334fd 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -93,6 +93,7 @@ static int ext4_get_tree(struct fs_context *fc); static int ext4_reconfigure(struct fs_context *fc); static void ext4_fc_free(struct fs_context *fc); static int ext4_init_fs_context(struct fs_context *fc); +static void ext4_kill_sb(struct super_block *sb); static const struct fs_parameter_spec ext4_param_specs[]; /* @@ -135,12 +136,12 @@ static struct file_system_type ext2_fs_type = { .name = "ext2", .init_fs_context = ext4_init_fs_context, .parameters = ext4_param_specs, - .kill_sb = kill_block_super, + .kill_sb = ext4_kill_sb, .fs_flags = FS_REQUIRES_DEV, }; MODULE_ALIAS_FS("ext2"); MODULE_ALIAS("ext2"); -#define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) +#define IS_EXT2_SB(sb) ((sb)->s_type == &ext2_fs_type) #else #define IS_EXT2_SB(sb) (0) #endif @@ -151,12 +152,12 @@ static struct file_system_type ext3_fs_type = { .name = "ext3", .init_fs_context = ext4_init_fs_context, .parameters = ext4_param_specs, - .kill_sb = kill_block_super, + .kill_sb = ext4_kill_sb, .fs_flags = FS_REQUIRES_DEV, }; MODULE_ALIAS_FS("ext3"); MODULE_ALIAS("ext3"); -#define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) +#define IS_EXT3_SB(sb) ((sb)->s_type == &ext3_fs_type) static inline void __ext4_read_bh(struct buffer_head *bh, blk_opf_t op_flags, @@ -1096,15 +1097,6 @@ void ext4_update_dynamic_rev(struct super_block *sb) */ } -static void ext4_bdev_mark_dead(struct block_device *bdev) -{ - ext4_force_shutdown(bdev->bd_holder, EXT4_GOING_FLAGS_NOLOGFLUSH); -} - -static const struct blk_holder_ops ext4_holder_ops = { - .mark_dead = ext4_bdev_mark_dead, -}; - /* * Open the external journal device */ @@ -1113,7 +1105,7 @@ static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) struct block_device *bdev; bdev = blkdev_get_by_dev(dev, BLK_OPEN_READ | BLK_OPEN_WRITE, sb, - &ext4_holder_ops); + &fs_holder_ops); if (IS_ERR(bdev)) goto fail; return bdev; @@ -1125,25 +1117,6 @@ fail: return NULL; } -/* - * Release the journal device - */ -static void ext4_blkdev_remove(struct ext4_sb_info *sbi) -{ - struct block_device *bdev; - bdev = sbi->s_journal_bdev; - if (bdev) { - /* - * Invalidate the journal device's buffers. We don't want them - * floating about in memory - the physical journal device may - * hotswapped, and it breaks the `ro-after' testing code. - */ - invalidate_bdev(bdev); - blkdev_put(bdev, sbi->s_sb); - sbi->s_journal_bdev = NULL; - } -} - static inline struct inode *orphan_list_entry(struct list_head *l) { return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; @@ -1339,8 +1312,13 @@ static void ext4_put_super(struct super_block *sb) sync_blockdev(sb->s_bdev); invalidate_bdev(sb->s_bdev); if (sbi->s_journal_bdev) { + /* + * Invalidate the journal device's buffers. We don't want them + * floating about in memory - the physical journal device may + * hotswapped, and it breaks the `ro-after' testing code. + */ sync_blockdev(sbi->s_journal_bdev); - ext4_blkdev_remove(sbi); + invalidate_bdev(sbi->s_journal_bdev); } ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); @@ -5572,7 +5550,6 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb) spin_lock_init(&sbi->s_bdev_wb_lock); errseq_check_and_advance(&sb->s_bdev->bd_inode->i_mapping->wb_err, &sbi->s_bdev_wb_err); - sb->s_bdev->bd_super = sb; EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; ext4_orphan_cleanup(sb, es); EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; @@ -5664,9 +5641,11 @@ failed_mount: kfree(get_qf_name(sb, sbi, i)); #endif fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); - /* ext4_blkdev_remove() calls kill_bdev(), release bh before it. */ brelse(sbi->s_sbh); - ext4_blkdev_remove(sbi); + if (sbi->s_journal_bdev) { + invalidate_bdev(sbi->s_journal_bdev); + blkdev_put(sbi->s_journal_bdev, sb); + } out_fail: invalidate_bdev(sb->s_bdev); sb->s_fs_info = NULL; @@ -5854,7 +5833,10 @@ static journal_t *ext4_get_dev_journal(struct super_block *sb, if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) return NULL; + /* see get_tree_bdev why this is needed and safe */ + up_write(&sb->s_umount); bdev = ext4_blkdev_get(j_dev, sb); + down_write(&sb->s_umount); if (bdev == NULL) return NULL; @@ -7273,12 +7255,23 @@ static inline int ext3_feature_set_ok(struct super_block *sb) return 1; } +static void ext4_kill_sb(struct super_block *sb) +{ + struct ext4_sb_info *sbi = EXT4_SB(sb); + struct block_device *journal_bdev = sbi ? sbi->s_journal_bdev : NULL; + + kill_block_super(sb); + + if (journal_bdev) + blkdev_put(journal_bdev, sb); +} + static struct file_system_type ext4_fs_type = { .owner = THIS_MODULE, .name = "ext4", .init_fs_context = ext4_init_fs_context, .parameters = ext4_param_specs, - .kill_sb = kill_block_super, + .kill_sb = ext4_kill_sb, .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP | FS_MGTIME, }; MODULE_ALIAS_FS("ext4"); |