[PATCH 1/3] direct-io: always call ->end_io if non-NULL

Christoph Hellwig
2016-02-02T20:17:48Z

This way we can pass back errors to the file system, and allow for
cleanup required for all direct I/O invocations.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
fs/dax.c | 2 +-
fs/direct-io.c | 4 ++--
fs/ext4/inode.c | 3 +++
fs/ocfs2/aops.c | 3 +++
fs/xfs/xfs_aops.c | 3 +++
5 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/fs/dax.c b/fs/dax.c
index 4fd6b0c..e47d1ba 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -267,7 +267,7 @@ ssize_t dax_do_io(struct kiocb *iocb, struct inode *inode,
if ((flags & DIO_LOCKING) && iov_iter_rw(iter) == READ)
inode_unlock(inode);

- if ((retval > 0) && end_io)
+ if (end_io)
end_io(iocb, pos, retval, bh.b_private);

if (!(flags & DIO_SKIP_DIO_COUNT))
diff --git a/fs/direct-io.c b/fs/direct-io.c
index 1b2f7ff..ead7ac1 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -253,8 +253,8 @@ static ssize_t dio_complete(struct dio *dio, loff_t offset, ssize_t ret,
if (ret == 0)
ret = transferred;

- if (dio->end_io && dio->result)
- dio->end_io(dio->iocb, offset, transferred, dio->private);
+ if (dio->end_io)
+ dio->end_io(dio->iocb, offset, ret, dio->private);

if (!(dio->flags & DIO_SKIP_DIO_COUNT))
inode_dio_end(dio->inode);
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 83bc8bf..d04555b 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3166,6 +3166,9 @@ static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset,
{
ext4_io_end_t *io_end = iocb->private;

+ if (size <= 0)
+ return;
+
/* if not async direct IO just return */
if (!io_end)
return;
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index 794fd15..1eeb804 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -628,6 +628,9 @@ static void ocfs2_dio_end_io(struct kiocb *iocb,
struct inode *inode = file_inode(iocb->ki_filp);
int level;

+ if (bytes <= 0)
+ return;
+
/* this io's submitter should not have unlocked this before we could */
BUG_ON(!ocfs2_iocb_is_rw_locked(iocb));

diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
index 379c089..c318e9f 100644
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -1655,6 +1655,9 @@ xfs_end_io_direct_write(
struct inode *inode = file_inode(iocb->ki_filp);
struct xfs_ioend *ioend = private;

+ if (size <= 0)
+ return;
+
trace_xfs_gbmap_direct_endio(XFS_I(inode), offset, size,
ioend ? ioend->io_type : 0, NULL);

--
2.1.4