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authorNikolay Aleksandrov <nikolay@cumulusnetworks.com>2020-01-14 20:56:10 +0300
committerDavid S. Miller <davem@davemloft.net>2020-01-15 15:48:17 +0300
commitf26b296585dca043d78f13ef67cb17fb200d5e57 (patch)
treebce0a8cb4ea2d17d089cf78cba988fc1eb14fa32 /net/bridge
parent8dcea187088bce5d2f1149294ad109f022653547 (diff)
downloadlinux-f26b296585dca043d78f13ef67cb17fb200d5e57.tar.xz
net: bridge: vlan: add new rtm message support
Add initial RTM_NEWVLAN support which can only create vlans, operating similar to the current br_afspec(). We will use it later to also change per-vlan options. Old-style (flag-based) vlan ranges are not allowed when using RTM messages, we will introduce vlan ranges later via a new nested attribute which would allow us to have all the information about a range encapsulated into a single nl attribute. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bridge')
-rw-r--r--net/bridge/br_netlink.c12
-rw-r--r--net/bridge/br_private.h6
-rw-r--r--net/bridge/br_vlan.c111
3 files changed, 123 insertions, 6 deletions
diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index 75a7ecf95d7f..b3da4f46dc64 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -561,12 +561,12 @@ static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
return err;
}
-static int br_process_vlan_info(struct net_bridge *br,
- struct net_bridge_port *p, int cmd,
- struct bridge_vlan_info *vinfo_curr,
- struct bridge_vlan_info **vinfo_last,
- bool *changed,
- struct netlink_ext_ack *extack)
+int br_process_vlan_info(struct net_bridge *br,
+ struct net_bridge_port *p, int cmd,
+ struct bridge_vlan_info *vinfo_curr,
+ struct bridge_vlan_info **vinfo_last,
+ bool *changed,
+ struct netlink_ext_ack *extack)
{
if (!br_vlan_valid_id(vinfo_curr->vid, extack))
return -EINVAL;
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 1c00411ae938..ee3871dea68f 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -1237,6 +1237,12 @@ int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
u32 filter_mask, int nlflags);
+int br_process_vlan_info(struct net_bridge *br,
+ struct net_bridge_port *p, int cmd,
+ struct bridge_vlan_info *vinfo_curr,
+ struct bridge_vlan_info **vinfo_last,
+ bool *changed,
+ struct netlink_ext_ack *extack);
#ifdef CONFIG_SYSFS
/* br_sysfs_if.c */
diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c
index 5f2ac4f244f5..6da0210b01eb 100644
--- a/net/bridge/br_vlan.c
+++ b/net/bridge/br_vlan.c
@@ -1643,13 +1643,124 @@ out_err:
return err;
}
+static const struct nla_policy br_vlan_db_policy[BRIDGE_VLANDB_ENTRY_MAX + 1] = {
+ [BRIDGE_VLANDB_ENTRY_INFO] = { .type = NLA_EXACT_LEN,
+ .len = sizeof(struct bridge_vlan_info) },
+};
+
+static int br_vlan_rtm_process_one(struct net_device *dev,
+ const struct nlattr *attr,
+ int cmd, struct netlink_ext_ack *extack)
+{
+ struct bridge_vlan_info *vinfo, *vinfo_last = NULL;
+ struct nlattr *tb[BRIDGE_VLANDB_ENTRY_MAX + 1];
+ struct net_bridge_vlan_group *vg;
+ struct net_bridge_port *p = NULL;
+ int err = 0, cmdmap = 0;
+ struct net_bridge *br;
+ bool changed = false;
+
+ if (netif_is_bridge_master(dev)) {
+ br = netdev_priv(dev);
+ vg = br_vlan_group(br);
+ } else {
+ p = br_port_get_rtnl(dev);
+ if (WARN_ON(!p))
+ return -ENODEV;
+ br = p->br;
+ vg = nbp_vlan_group(p);
+ }
+
+ if (WARN_ON(!vg))
+ return -ENODEV;
+
+ err = nla_parse_nested(tb, BRIDGE_VLANDB_ENTRY_MAX, attr,
+ br_vlan_db_policy, extack);
+ if (err)
+ return err;
+
+ if (!tb[BRIDGE_VLANDB_ENTRY_INFO]) {
+ NL_SET_ERR_MSG_MOD(extack, "Missing vlan entry info");
+ return -EINVAL;
+ }
+
+ vinfo = nla_data(tb[BRIDGE_VLANDB_ENTRY_INFO]);
+ if (vinfo->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
+ BRIDGE_VLAN_INFO_RANGE_END)) {
+ NL_SET_ERR_MSG_MOD(extack, "Old-style vlan ranges are not allowed when using RTM vlan calls");
+ return -EINVAL;
+ }
+ if (!br_vlan_valid_id(vinfo->vid, extack))
+ return -EINVAL;
+
+ switch (cmd) {
+ case RTM_NEWVLAN:
+ cmdmap = RTM_SETLINK;
+ break;
+ }
+
+ err = br_process_vlan_info(br, p, cmdmap, vinfo, &vinfo_last, &changed,
+ extack);
+ if (changed)
+ br_ifinfo_notify(cmdmap, br, p);
+
+ return err;
+}
+
+static int br_vlan_rtm_process(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct netlink_ext_ack *extack)
+{
+ struct net *net = sock_net(skb->sk);
+ struct br_vlan_msg *bvm;
+ struct net_device *dev;
+ struct nlattr *attr;
+ int err, vlans = 0;
+ int rem;
+
+ /* this should validate the header and check for remaining bytes */
+ err = nlmsg_parse(nlh, sizeof(*bvm), NULL, BRIDGE_VLANDB_MAX, NULL,
+ extack);
+ if (err < 0)
+ return err;
+
+ bvm = nlmsg_data(nlh);
+ dev = __dev_get_by_index(net, bvm->ifindex);
+ if (!dev)
+ return -ENODEV;
+
+ if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) {
+ NL_SET_ERR_MSG_MOD(extack, "The device is not a valid bridge or bridge port");
+ return -EINVAL;
+ }
+
+ nlmsg_for_each_attr(attr, nlh, sizeof(*bvm), rem) {
+ if (nla_type(attr) != BRIDGE_VLANDB_ENTRY)
+ continue;
+
+ vlans++;
+ err = br_vlan_rtm_process_one(dev, attr, nlh->nlmsg_type,
+ extack);
+ if (err)
+ break;
+ }
+ if (!vlans) {
+ NL_SET_ERR_MSG_MOD(extack, "No vlans found to process");
+ err = -EINVAL;
+ }
+
+ return err;
+}
+
void br_vlan_rtnl_init(void)
{
rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_GETVLAN, NULL,
br_vlan_rtm_dump, 0);
+ rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_NEWVLAN,
+ br_vlan_rtm_process, NULL, 0);
}
void br_vlan_rtnl_uninit(void)
{
rtnl_unregister(PF_BRIDGE, RTM_GETVLAN);
+ rtnl_unregister(PF_BRIDGE, RTM_NEWVLAN);
}