Commit 187372a3 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Dave Chinner

direct-io: always call ->end_io if non-NULL

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

Also allow the ->end_io handlers to return errors on their own, so that
I/O completion errors can be passed on to the callers.
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarDave Chinner <dchinner@redhat.com>
Signed-off-by: default avatarDave Chinner <david@fromorbit.com>
parent 36f90b0a
......@@ -267,8 +267,13 @@ 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)
end_io(iocb, pos, retval, bh.b_private);
if (end_io) {
int err;
err = end_io(iocb, pos, retval, bh.b_private);
if (err)
retval = err;
}
if (!(flags & DIO_SKIP_DIO_COUNT))
inode_dio_end(inode);
......
......@@ -253,8 +253,13 @@ 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) {
int err;
err = dio->end_io(dio->iocb, offset, ret, dio->private);
if (err)
ret = err;
}
if (!(dio->flags & DIO_SKIP_DIO_COUNT))
inode_dio_end(dio->inode);
......
......@@ -3161,14 +3161,17 @@ out:
}
#endif
static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset,
static int ext4_end_io_dio(struct kiocb *iocb, loff_t offset,
ssize_t size, void *private)
{
ext4_io_end_t *io_end = iocb->private;
if (size <= 0)
return 0;
/* if not async direct IO just return */
if (!io_end)
return;
return 0;
ext_debug("ext4_end_io_dio(): io_end 0x%p "
"for inode %lu, iocb 0x%p, offset %llu, size %zd\n",
......@@ -3179,6 +3182,8 @@ static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset,
io_end->offset = offset;
io_end->size = size;
ext4_put_io_end(io_end);
return 0;
}
/*
......
......@@ -620,7 +620,7 @@ bail:
* particularly interested in the aio/dio case. We use the rw_lock DLM lock
* to protect io on one node from truncation on another.
*/
static void ocfs2_dio_end_io(struct kiocb *iocb,
static int ocfs2_dio_end_io(struct kiocb *iocb,
loff_t offset,
ssize_t bytes,
void *private)
......@@ -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 0;
/* this io's submitter should not have unlocked this before we could */
BUG_ON(!ocfs2_iocb_is_rw_locked(iocb));
......@@ -644,6 +647,8 @@ static void ocfs2_dio_end_io(struct kiocb *iocb,
level = ocfs2_iocb_rw_locked_level(iocb);
ocfs2_rw_unlock(inode, level);
}
return 0;
}
static int ocfs2_releasepage(struct page *page, gfp_t wait)
......
......@@ -1645,7 +1645,7 @@ out_end_io:
* case the completion can be called in interrupt context, whereas if we have an
* ioend we will always be called in task context (i.e. from a workqueue).
*/
STATIC void
STATIC int
xfs_end_io_direct_write(
struct kiocb *iocb,
loff_t offset,
......@@ -1655,15 +1655,19 @@ xfs_end_io_direct_write(
struct inode *inode = file_inode(iocb->ki_filp);
struct xfs_ioend *ioend = private;
if (size <= 0)
return 0;
trace_xfs_gbmap_direct_endio(XFS_I(inode), offset, size,
ioend ? ioend->io_type : 0, NULL);
if (!ioend) {
ASSERT(offset + size <= i_size_read(inode));
return;
return 0;
}
__xfs_end_io_direct_write(inode, ioend, offset, size);
return 0;
}
static inline ssize_t
......@@ -1672,10 +1676,7 @@ xfs_vm_do_dio(
struct kiocb *iocb,
struct iov_iter *iter,
loff_t offset,
void (*endio)(struct kiocb *iocb,
loff_t offset,
ssize_t size,
void *private),
dio_iodone_t endio,
int flags)
{
struct block_device *bdev;
......
......@@ -70,7 +70,7 @@ extern int sysctl_protected_hardlinks;
struct buffer_head;
typedef int (get_block_t)(struct inode *inode, sector_t iblock,
struct buffer_head *bh_result, int create);
typedef void (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
typedef int (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
ssize_t bytes, void *private);
typedef void (dax_iodone_t)(struct buffer_head *bh_map, int uptodate);
......
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