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net: Preliminary veth restore

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The peer device is named veth_host and is supposed to be pushed outside
the netns being restored for proper host-side configuration.

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Pavel Emelyanov
2012-08-10 17:36:00 +04:00
parent 3fee68f56b
commit 076faf7443
1 changed files with 31 additions and 1 deletions
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32
net.c
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@@ -182,6 +182,36 @@ static int restore_one_link(NetDeviceEntry *nde, int nlsk,
return do_rtnl_req(nlsk, &req, req.h.nlmsg_len, restore_link_cb, NULL);
}
#ifndef VETH_INFO_MAX
enum {
VETH_INFO_UNSPEC,
VETH_INFO_PEER,
__VETH_INFO_MAX
#define VETH_INFO_MAX (__VETH_INFO_MAX - 1)
};
#endif
static int veth_link_info(NetDeviceEntry *nde, struct newlink_req *req)
{
struct rtattr *veth_data, *peer_data;
struct ifinfomsg ifm;
char veth_host_name[] = "veth_host";
addattr_l(&req->h, sizeof(*req), IFLA_INFO_KIND, "veth", 4);
veth_data = NLMSG_TAIL(&req->h);
addattr_l(&req->h, sizeof(*req), IFLA_INFO_DATA, NULL, 0);
peer_data = NLMSG_TAIL(&req->h);
memset(&ifm, 0, sizeof(ifm));
addattr_l(&req->h, sizeof(*req), VETH_INFO_PEER, &ifm, sizeof(ifm));
addattr_l(&req->h, sizeof(*req), IFLA_IFNAME, veth_host_name, sizeof(veth_host_name));
peer_data->rta_len = (void *)NLMSG_TAIL(&req->h) - (void *)peer_data;
veth_data->rta_len = (void *)NLMSG_TAIL(&req->h) - (void *)veth_data;
return 0;
}
static int restore_link(NetDeviceEntry *nde, int nlsk)
{
pr_info("Restoring link type %d\n", nde->type);
@@ -190,7 +220,7 @@ static int restore_link(NetDeviceEntry *nde, int nlsk)
case ND_TYPE__LOOPBACK:
return restore_one_link(nde, nlsk, NULL);
case ND_TYPE__VETH:
break;
return restore_one_link(nde, nlsk, veth_link_info);
}
BUG_ON(1);