kvm tools: Add missing 9p rename handler

This adds a rename handler which actually allows us to rename files in the
guest.

Reported-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

diff --git a/tools/kvm/virtio/9p.c b/tools/kvm/virtio/9p.c
index 08b1be7db3ace8d28776aae61d6adf9057b5e85d..2392bd181fc3f88ee74724ebdbc873f19835ebc3 100644 (file)
--- a/tools/kvm/virtio/9p.c
+++ b/tools/kvm/virtio/9p.c
@@ -700,6 +700,32 @@ err_out:
        virtio_p9_error_reply(p9dev, pdu, errno, outlen);
        return; 
 }
+
+static void virtio_p9_rename(struct p9_dev *p9dev,
+                              struct p9_pdu *pdu, u32 *outlen)
+{
+       int ret;
+       u32 fid_val, new_fid_val;
+       struct p9_fid *fid, *new_fid;
+       char full_path[PATH_MAX], *new_name;
+
+       virtio_p9_pdu_readf(pdu, "dds", &fid_val, &new_fid_val, &new_name);
+       fid = &p9dev->fids[fid_val];
+       new_fid = &p9dev->fids[new_fid_val];
+
+       sprintf(full_path, "%s/%s", new_fid->abs_path, new_name);
+       ret = rename(fid->abs_path, full_path);
+       if (ret < 0)
+               goto err_out;
+       close_fid(p9dev, fid_val);
+       *outlen = pdu->write_offset;
+       virtio_p9_set_reply_header(pdu, *outlen);
+       return;
+
+err_out:
+       virtio_p9_error_reply(p9dev, pdu, errno, outlen);
+       return; 
+}
                               
 static void virtio_p9_readlink(struct p9_dev *p9dev,
                               struct p9_pdu *pdu, u32 *outlen)
@@ -1073,6 +1099,7 @@ static p9_handler *virtio_9p_dotl_handler [] = {
        [P9_TLCREATE]     = virtio_p9_create,
        [P9_TWRITE]       = virtio_p9_write,
        [P9_TREMOVE]      = virtio_p9_remove,
+       [P9_TRENAME]      = virtio_p9_rename,
 };
 
 static struct p9_pdu *virtio_p9_pdu_init(struct kvm *kvm, struct virt_queue *vq)