From: Yu Kuai <yukuai3@xxxxxxxxxx> Now that all filesystems stash the bdev file, it's ok to get mapping from the file. Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx> --- fs/ext4/super.c | 2 +- fs/jbd2/journal.c | 26 +++++++++++++++----------- include/linux/jbd2.h | 18 ++++++++++++++---- 3 files changed, 30 insertions(+), 16 deletions(-) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 55b3df71bf5e..4df1a5cfe0a5 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -5918,7 +5918,7 @@ static journal_t *ext4_open_dev_journal(struct super_block *sb, if (IS_ERR(bdev_file)) return ERR_CAST(bdev_file); - journal = jbd2_journal_init_dev(file_bdev(bdev_file), sb->s_bdev, j_start, + journal = jbd2_journal_init_dev(bdev_file, sb->s_bdev_file, j_start, j_len, sb->s_blocksize); if (IS_ERR(journal)) { ext4_msg(sb, KERN_ERR, "failed to create device journal"); diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index b6c114c11b97..abd42a6ccd0e 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -1516,11 +1516,12 @@ static int journal_load_superblock(journal_t *journal) * very few fields yet: that has to wait until we have created the * journal structures from from scratch, or loaded them from disk. */ -static journal_t *journal_init_common(struct block_device *bdev, - struct block_device *fs_dev, +static journal_t *journal_init_common(struct file *bdev_file, + struct file *fs_dev_file, unsigned long long start, int len, int blocksize) { static struct lock_class_key jbd2_trans_commit_key; + struct block_device *bdev = file_bdev(bdev_file); journal_t *journal; int err; int n; @@ -1531,7 +1532,9 @@ static journal_t *journal_init_common(struct block_device *bdev, journal->j_blocksize = blocksize; journal->j_dev = bdev; - journal->j_fs_dev = fs_dev; + journal->j_dev_file = bdev_file; + journal->j_fs_dev = file_bdev(fs_dev_file); + journal->j_fs_dev_file = fs_dev_file; journal->j_blk_offset = start; journal->j_total_len = len; jbd2_init_fs_dev_write_error(journal); @@ -1628,8 +1631,8 @@ static journal_t *journal_init_common(struct block_device *bdev, /** * journal_t * jbd2_journal_init_dev() - creates and initialises a journal structure - * @bdev: Block device on which to create the journal - * @fs_dev: Device which hold journalled filesystem for this journal. + * @bdev_file: Opened block device on which to create the journal + * @fs_dev_file: Opened device which hold journalled filesystem for this journal. * @start: Block nr Start of journal. * @len: Length of the journal in blocks. * @blocksize: blocksize of journalling device @@ -1640,13 +1643,13 @@ static journal_t *journal_init_common(struct block_device *bdev, * range of blocks on an arbitrary block device. * */ -journal_t *jbd2_journal_init_dev(struct block_device *bdev, - struct block_device *fs_dev, +journal_t *jbd2_journal_init_dev(struct file *bdev_file, + struct file *fs_dev_file, unsigned long long start, int len, int blocksize) { journal_t *journal; - journal = journal_init_common(bdev, fs_dev, start, len, blocksize); + journal = journal_init_common(bdev_file, fs_dev_file, start, len, blocksize); if (IS_ERR(journal)) return ERR_CAST(journal); @@ -1683,8 +1686,9 @@ journal_t *jbd2_journal_init_inode(struct inode *inode) inode->i_sb->s_id, inode->i_ino, (long long) inode->i_size, inode->i_sb->s_blocksize_bits, inode->i_sb->s_blocksize); - journal = journal_init_common(inode->i_sb->s_bdev, inode->i_sb->s_bdev, - blocknr, inode->i_size >> inode->i_sb->s_blocksize_bits, + journal = journal_init_common(inode->i_sb->s_bdev_file, + inode->i_sb->s_bdev_file, blocknr, + inode->i_size >> inode->i_sb->s_blocksize_bits, inode->i_sb->s_blocksize); if (IS_ERR(journal)) return ERR_CAST(journal); @@ -2009,7 +2013,7 @@ static int __jbd2_journal_erase(journal_t *journal, unsigned int flags) byte_count = (block_stop - block_start + 1) * journal->j_blocksize; - truncate_inode_pages_range(journal->j_dev->bd_inode->i_mapping, + truncate_inode_pages_range(journal->j_dev_file->f_mapping, byte_start, byte_stop); if (flags & JBD2_JOURNAL_FLUSH_DISCARD) { diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h index 971f3e826e15..fc26730ae8ef 100644 --- a/include/linux/jbd2.h +++ b/include/linux/jbd2.h @@ -968,6 +968,11 @@ struct journal_s */ struct block_device *j_dev; + /** + * @j_dev_file: Opended device @j_dev. + */ + struct file *j_dev_file; + /** * @j_blocksize: Block size for the location where we store the journal. */ @@ -993,6 +998,11 @@ struct journal_s */ struct block_device *j_fs_dev; + /** + * @j_fs_dev_file: Opened device @j_fs_dev. + */ + struct file *j_fs_dev_file; + /** * @j_fs_dev_wb_err: * @@ -1533,8 +1543,8 @@ extern void jbd2_journal_unlock_updates (journal_t *); void jbd2_journal_wait_updates(journal_t *); -extern journal_t * jbd2_journal_init_dev(struct block_device *bdev, - struct block_device *fs_dev, +extern journal_t *jbd2_journal_init_dev(struct file *bdev_file, + struct file *fs_dev_file, unsigned long long start, int len, int bsize); extern journal_t * jbd2_journal_init_inode (struct inode *); extern int jbd2_journal_update_format (journal_t *); @@ -1696,7 +1706,7 @@ static inline void jbd2_journal_abort_handle(handle_t *handle) static inline void jbd2_init_fs_dev_write_error(journal_t *journal) { - struct address_space *mapping = journal->j_fs_dev->bd_inode->i_mapping; + struct address_space *mapping = journal->j_fs_dev_file->f_mapping; /* * Save the original wb_err value of client fs's bdev mapping which @@ -1707,7 +1717,7 @@ static inline void jbd2_init_fs_dev_write_error(journal_t *journal) static inline int jbd2_check_fs_dev_write_error(journal_t *journal) { - struct address_space *mapping = journal->j_fs_dev->bd_inode->i_mapping; + struct address_space *mapping = journal->j_fs_dev_file->f_mapping; return errseq_check(&mapping->wb_err, READ_ONCE(journal->j_fs_dev_wb_err)); -- 2.39.2