iomap can return -ENOTBLK if pagecache invalidation fails. Let's make sure if -ENOTBLK is ever returned for atomic writes than we fail the write request (-EIO) instead of fallback to buffered-io. Suggested-by: Darrick J. Wong <djwong@xxxxxxxxxx> Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@xxxxxxxxx> --- This should be on top of John's atomic write series [1]. [1]: https://lore.kernel.org/linux-xfs/20241019125113.369994-1-john.g.garry@xxxxxxxxxx/ fs/xfs/xfs_file.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index ca47cae5a40a..b819a9273511 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -876,6 +876,14 @@ xfs_file_write_iter( ret = xfs_file_dio_write(iocb, from); if (ret != -ENOTBLK) return ret; + /* + * iomap can return -ENOTBLK if pagecache invalidation fails. + * Let's make sure if -ENOTBLK is ever returned for atomic + * writes than we fail the write request instead of fallback + * to buffered-io. + */ + if (iocb->ki_flags & IOCB_ATOMIC) + return -EIO; } return xfs_file_buffered_write(iocb, from); -- 2.39.5
