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fuse: return -EIOCBQUEUED from fuse_direct_IO() for all async requests 

If request submission fails for an async request (i.e.,
get_user_pages() returns -ERESTARTSYS), we currently skip the
-EIOCBQUEUED return and drop into wait_for_sync_kiocb() forever.

Avoid this by always returning -EIOCBQUEUED for async requests. If
an error occurs, the error is passed into fuse_aio_complete(),
returned via aio_complete() and thus propagated to userspace via
io_getevents().

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Maxim Patlasov <MPatlasov@parallels.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
This commit is contained in:
Brian Foster 2013-05-30 15:35:50 -04:00 committed by Miklos Szeredi
parent 28420dad23
commit c9ecf989cc
1 changed files with 1 additions and 1 deletions
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2
fs/fuse/file.c
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@ -2432,7 +2432,7 @@ fuse_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
fuse_aio_complete(io, ret < 0 ? ret : 0, -1);
/* we have a non-extending, async request, so return */
if (ret > 0 && !is_sync_kiocb(iocb))
if (!is_sync_kiocb(iocb))
return -EIOCBQUEUED;
ret = wait_on_sync_kiocb(iocb);