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Date: Tue, 15 Jan 2019 17:36:13 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Theodore Tso <tytso@....edu>, stable@...nel.org Subject: [PATCH 4.14 24/27] ext4: use ext4_write_inode() when fsyncing w/o a journal 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Theodore Ts'o <tytso@....edu> commit ad211f3e94b314a910d4af03178a0b52a7d1ee0a upstream. In no-journal mode, we previously used __generic_file_fsync() in no-journal mode. This triggers a lockdep warning, and in addition, it's not safe to depend on the inode writeback mechanism in the case ext4. We can solve both problems by calling ext4_write_inode() directly. Signed-off-by: Theodore Ts'o <tytso@....edu> Cc: stable@...nel.org Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- fs/ext4/fsync.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) --- a/fs/ext4/fsync.c +++ b/fs/ext4/fsync.c @@ -116,8 +116,16 @@ int ext4_sync_file(struct file *file, lo goto out; } + ret = file_write_and_wait_range(file, start, end); + if (ret) + return ret; + if (!journal) { - ret = __generic_file_fsync(file, start, end, datasync); + struct writeback_control wbc = { + .sync_mode = WB_SYNC_ALL + }; + + ret = ext4_write_inode(inode, &wbc); if (!ret) ret = ext4_sync_parent(inode); if (test_opt(inode->i_sb, BARRIER)) @@ -125,9 +133,6 @@ int ext4_sync_file(struct file *file, lo goto out; } - ret = file_write_and_wait_range(file, start, end); - if (ret) - return ret; /* * data=writeback,ordered: * The caller's filemap_fdatawrite()/wait will sync the data.
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