lxc: restore the ability to move nl80211 device

nl80211 device can't be moved to another namespace due to
e389f2afd8509(start: unify and simplify network creation), and lxc
community has fixed this issue with:

commit 3dd7829433f63b2ec1323a1f237efa7d67ea6e2b lxc upstream

This patch is grabbing the commit above, and should be abandoned with
lxc uprev afterwards.

See more details here: https://github.com/lxc/lxc/issues/3105

Signed-off-by: Yunguo Wei <yunguo.wei@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
This commit is contained in:
Yunguo Wei 2019-09-12 16:31:55 +08:00 committed by Bruce Ashfield
parent 85f7376fa4
commit af40c87298
2 changed files with 95 additions and 0 deletions

View File

@ -0,0 +1,94 @@
From 3dd7829433f63b2ec1323a1f237efa7d67ea6e2b Mon Sep 17 00:00:00 2001
From: Christian Brauner <christian.brauner@ubuntu.com>
Date: Fri, 26 Jul 2019 08:20:02 +0200
Subject: [PATCH] network: restore ability to move nl80211 devices
Closes #3105.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
---
src/lxc/network.c | 31 +++++++++++++++++--------------
1 file changed, 17 insertions(+), 14 deletions(-)
diff --git a/src/lxc/network.c b/src/lxc/network.c
index 9755116..7684f95 100644
--- a/src/lxc/network.c
+++ b/src/lxc/network.c
@@ -1248,22 +1248,21 @@ static int lxc_netdev_rename_by_name_in_netns(pid_t pid, const char *old,
static int lxc_netdev_move_wlan(char *physname, const char *ifname, pid_t pid,
const char *newname)
{
- char *cmd;
+ __do_free char *cmd = NULL;
pid_t fpid;
- int err = -1;
/* Move phyN into the container. TODO - do this using netlink.
* However, IIUC this involves a bit more complicated work to talk to
* the 80211 module, so for now just call out to iw.
*/
cmd = on_path("iw", NULL);
- if (!cmd)
- goto out1;
- free(cmd);
+ if (!cmd) {
+ return -1;
+ }
fpid = fork();
if (fpid < 0)
- goto out1;
+ return -1;
if (fpid == 0) {
char pidstr[30];
@@ -1274,21 +1273,18 @@ static int lxc_netdev_move_wlan(char *physname, const char *ifname, pid_t pid,
}
if (wait_for_pid(fpid))
- goto out1;
+ return -1;
- err = 0;
if (newname)
- err = lxc_netdev_rename_by_name_in_netns(pid, ifname, newname);
+ return lxc_netdev_rename_by_name_in_netns(pid, ifname, newname);
-out1:
- free(physname);
- return err;
+ return 0;
}
int lxc_netdev_move_by_name(const char *ifname, pid_t pid, const char* newname)
{
+ __do_free char *physname = NULL;
int index;
- char *physname;
if (!ifname)
return -EINVAL;
@@ -3279,13 +3275,20 @@ int lxc_network_move_created_netdev_priv(struct lxc_handler *handler)
return 0;
lxc_list_for_each(iterator, network) {
+ __do_free char *physname = NULL;
int ret;
struct lxc_netdev *netdev = iterator->elem;
if (!netdev->ifindex)
continue;
- ret = lxc_netdev_move_by_index(netdev->ifindex, pid, NULL);
+ if (netdev->type == LXC_NET_PHYS)
+ physname = is_wlan(netdev->link);
+
+ if (physname)
+ ret = lxc_netdev_move_wlan(physname, netdev->link, pid, NULL);
+ else
+ ret = lxc_netdev_move_by_index(netdev->ifindex, pid, NULL);
if (ret) {
errno = -ret;
SYSERROR("Failed to move network device \"%s\" with ifindex %d to network namespace %d",
--
2.7.4

View File

@ -43,6 +43,7 @@ SRC_URI = "http://linuxcontainers.org/downloads/${BPN}-${PV}.tar.gz \
file://template-make-busybox-template-compatible-with-core-.patch \
file://tests-our-init-is-not-busybox.patch \
file://tests-add-no-validate-when-using-download-template.patch \
file://network-restore-ability-to-move-nl80211-devices.patch \
file://dnsmasq.conf \
file://lxc-net \
"