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authorRusty Russell <rusty@rustcorp.com.au>2008-02-08 04:20:14 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-08 09:22:33 -0800
commit7adfa2ff3efa02a7a9f2632d2d2662d3e5eb5304 (patch)
tree8a312d527e25142c65eec3bf9360cfbaae4c2666
parent25478445c4a39318acbe08ba8df7945766cbb5b5 (diff)
aio: partial write should not return error code
When an AIO write gets an error after writing some data (eg. ENOSPC), it should return the amount written already, not the error. Just like write() is supposed to. This was found by the libaio test suite. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-By: Zach Brown <zach.brown@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/aio.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/aio.c b/fs/aio.c
index 8a48ab0c278d..26c1930889fa 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -1347,6 +1347,13 @@ static ssize_t aio_rw_vect_retry(struct kiocb *iocb)
if ((ret == 0) || (iocb->ki_left == 0))
ret = iocb->ki_nbytes - iocb->ki_left;
+ /* If we managed to write some out we return that, rather than
+ * the eventual error. */
+ if (opcode == IOCB_CMD_PWRITEV
+ && ret < 0 && ret != -EIOCBQUEUED && ret != -EIOCBRETRY
+ && iocb->ki_nbytes - iocb->ki_left)
+ ret = iocb->ki_nbytes - iocb->ki_left;
+
return ret;
}