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-rw-r--r--src/vnet/devices/tap/tap.c79
1 files changed, 24 insertions, 55 deletions
diff --git a/src/vnet/devices/tap/tap.c b/src/vnet/devices/tap/tap.c
index 014c1f0dad4..8bd03aa178e 100644
--- a/src/vnet/devices/tap/tap.c
+++ b/src/vnet/devices/tap/tap.c
@@ -201,23 +201,26 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args)
err = clib_error_return (0, "host_if_name is not provided");
goto error;
}
- if (args->host_namespace)
+ }
+
+ /* if namespace is specified, all further netlink messages should be executed
+ * after we change our net namespace */
+ if (args->host_namespace)
+ {
+ old_netns_fd = clib_netns_open (NULL /* self */);
+ if ((nfd = clib_netns_open (args->host_namespace)) == -1)
{
- old_netns_fd = clib_netns_open (NULL /* self */);
- if ((nfd = clib_netns_open (args->host_namespace)) == -1)
- {
- args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
- args->error = clib_error_return_unix (0, "clib_netns_open '%s'",
- args->host_namespace);
- goto error;
- }
- if (clib_setns (nfd) == -1)
- {
- args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
- args->error = clib_error_return_unix (0, "setns '%s'",
- args->host_namespace);
- goto error;
- }
+ args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
+ args->error = clib_error_return_unix (0, "clib_netns_open '%s'",
+ args->host_namespace);
+ goto error;
+ }
+ if (clib_setns (nfd) == -1)
+ {
+ args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
+ args->error =
+ clib_error_return_unix (0, "setns '%s'", args->host_namespace);
+ goto error;
}
}
@@ -400,44 +403,6 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args)
virtio_set_net_hdr_size (vif);
- if (!(args->tap_flags & TAP_FLAG_ATTACH))
- {
- /* if namespace is specified, all further netlink messages should be executed
- after we change our net namespace */
- if (args->host_namespace)
- {
- old_netns_fd = clib_netns_open (NULL /* self */);
- if ((nfd = clib_netns_open (args->host_namespace)) == -1)
- {
- args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
- args->error = clib_error_return_unix (0, "clib_netns_open '%s'",
- args->host_namespace);
- goto error;
- }
- args->error = vnet_netlink_set_link_netns (vif->ifindex, nfd,
- host_if_name);
- if (args->error)
- {
- args->rv = VNET_API_ERROR_NETLINK_ERROR;
- goto error;
- }
- if (clib_setns (nfd) == -1)
- {
- args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
- args->error = clib_error_return_unix (0, "setns '%s'",
- args->host_namespace);
- goto error;
- }
- if ((vif->ifindex = if_nametoindex (host_if_name)) == 0)
- {
- args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
- args->error = clib_error_return_unix (0, "if_nametoindex '%s'",
- host_if_name);
- goto error;
- }
- }
- }
-
if (vif->type == VIRTIO_IF_TYPE_TAP)
{
if (ethernet_mac_address_is_zero (args->host_mac_addr.bytes))
@@ -757,7 +722,11 @@ done:
if (vhost_mem)
clib_mem_free (vhost_mem);
if (old_netns_fd != -1)
- close (old_netns_fd);
+ {
+ /* in case we errored with a switched netns */
+ clib_setns (old_netns_fd);
+ close (old_netns_fd);
+ }
if (nfd != -1)
close (nfd);
}