From 7adfa2ff3efa02a7a9f2632d2d2662d3e5eb5304 Mon Sep 17 00:00:00 2001 From: Rusty Russell Date: Fri, 8 Feb 2008 04:20:14 -0800 Subject: [PATCH] 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 Acked-By: Zach Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/aio.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/fs/aio.c b/fs/aio.c index 8a48ab0c27..26c1930889 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; } -- 2.39.5