While we process 9p requests serially, so there's no point for implementing
flush, we still need to answer it to prevent guest kernel from hanging waiting
for it.
Signed-off-by: Sasha Levin <levinsasha928@xxxxxxxxx>
---
tools/kvm/virtio/9p.c | 15 ++++++++++++++-
1 files changed, 14 insertions(+), 1 deletions(-)
diff --git a/tools/kvm/virtio/9p.c b/tools/kvm/virtio/9p.c
index b4341b9..830fc50 100644
--- a/tools/kvm/virtio/9p.c
+++ b/tools/kvm/virtio/9p.c
@@ -1071,6 +1071,19 @@ err_out:
return;
}
+static void virtio_p9_flush(struct p9_dev *p9dev,
+ struct p9_pdu *pdu, u32 *outlen)
+{
+ u16 tag, oldtag;
+
+ virtio_p9_pdu_readf(pdu, "ww", &tag, &oldtag);
+ virtio_p9_pdu_writef(pdu, "w", tag);
+ *outlen = pdu->write_offset;
+ virtio_p9_set_reply_header(pdu, *outlen);
+
+ return;
+}
+
static void virtio_p9_eopnotsupp(struct p9_dev *p9dev,
struct p9_pdu *pdu, u32 *outlen)
{
@@ -1105,7 +1118,7 @@ static p9_handler *virtio_9p_dotl_handler [] = {
[P9_TCLUNK] = virtio_p9_clunk,
[P9_TFSYNC] = virtio_p9_fsync,
[P9_TREAD] = virtio_p9_read,
- [P9_TFLUSH] = virtio_p9_eopnotsupp,
+ [P9_TFLUSH] = virtio_p9_flush,
[P9_TLINK] = virtio_p9_link,
[P9_TSYMLINK] = virtio_p9_symlink,
[P9_TLCREATE] = virtio_p9_create,
--
1.7.8.6
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