direct-io: move aio_complete into ->end_io
Filesystems with unwritten extent support must not complete an AIO request
until the transaction to convert the extent has been commited. That means
the aio_complete calls needs to be moved into the ->end_io callback so
that the filesystem can control when to call it exactly.
This makes a bit of a mess out of dio_complete and the ->end_io callback
prototype even more complicated.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Alex Elder <aelder@sgi.com>
diff --git a/fs/direct-io.c b/fs/direct-io.c
index 7600aac..a10cb91 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -218,7 +218,7 @@
* filesystems can use it to hold additional state between get_block calls and
* dio_complete.
*/
-static int dio_complete(struct dio *dio, loff_t offset, int ret)
+static int dio_complete(struct dio *dio, loff_t offset, int ret, bool is_async)
{
ssize_t transferred = 0;
@@ -239,14 +239,6 @@
transferred = dio->i_size - offset;
}
- if (dio->end_io && dio->result)
- dio->end_io(dio->iocb, offset, transferred,
- dio->map_bh.b_private);
-
- if (dio->flags & DIO_LOCKING)
- /* lockdep: non-owner release */
- up_read_non_owner(&dio->inode->i_alloc_sem);
-
if (ret == 0)
ret = dio->page_errors;
if (ret == 0)
@@ -254,6 +246,17 @@
if (ret == 0)
ret = transferred;
+ if (dio->end_io && dio->result) {
+ dio->end_io(dio->iocb, offset, transferred,
+ dio->map_bh.b_private, ret, is_async);
+ } else if (is_async) {
+ aio_complete(dio->iocb, ret, 0);
+ }
+
+ if (dio->flags & DIO_LOCKING)
+ /* lockdep: non-owner release */
+ up_read_non_owner(&dio->inode->i_alloc_sem);
+
return ret;
}
@@ -277,8 +280,7 @@
spin_unlock_irqrestore(&dio->bio_lock, flags);
if (remaining == 0) {
- int ret = dio_complete(dio, dio->iocb->ki_pos, 0);
- aio_complete(dio->iocb, ret, 0);
+ dio_complete(dio, dio->iocb->ki_pos, 0, true);
kfree(dio);
}
}
@@ -1126,7 +1128,7 @@
spin_unlock_irqrestore(&dio->bio_lock, flags);
if (ret2 == 0) {
- ret = dio_complete(dio, offset, ret);
+ ret = dio_complete(dio, offset, ret, false);
kfree(dio);
} else
BUG_ON(ret != -EIOCBQUEUED);