[PATCH V2 07/12] bridge: Add netlink interface to configure vlans on bridge ports
From: Vlad Yasevich <hidden>
Date: 2012-12-18 19:01:34
Subsystem:
ethernet bridge, networking drivers, networking [general], the rest · Maintainers:
Nikolay Aleksandrov, Ido Schimmel, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Add a netlink interface to add and remove vlan configuration on bridge port. The interface uses the RTM_SETLINK message and encodes the vlan configuration inside the IFLA_AF_SPEC. It is possble to include multiple vlans to either add or remove in a single message. Signed-off-by: Vlad Yasevich <redacted> --- include/uapi/linux/if_bridge.h | 17 ++++++ net/bridge/br_if.c | 1 + net/bridge/br_netlink.c | 107 +++++++++++++++++++++++++++++++++------ 3 files changed, 108 insertions(+), 17 deletions(-)
diff --git a/include/uapi/linux/if_bridge.h b/include/uapi/linux/if_bridge.h
index 52aa738..d0b4f5c 100644
--- a/include/uapi/linux/if_bridge.h
+++ b/include/uapi/linux/if_bridge.h@@ -108,15 +108,32 @@ struct __fdb_entry { * [IFLA_AF_SPEC] = { * [IFLA_BRIDGE_FLAGS] * [IFLA_BRIDGE_MODE] + * [IFLA_BRIDGE_VLAN_INFO] * } */ enum { IFLA_BRIDGE_FLAGS, IFLA_BRIDGE_MODE, + IFLA_BRIDGE_VLAN_INFO, __IFLA_BRIDGE_MAX, }; #define IFLA_BRIDGE_MAX (__IFLA_BRIDGE_MAX - 1) +/* Bridge VLAN info + * [IFLA_BRIDGE_VLAN_INFO] + */ +enum { + BR_VLAN_ADD, + BR_VLAN_DEL, +}; + +struct bridge_vlan_info { + u16 op_code; + u16 flags; + u16 vid; + u16 unused; +}; + /* Bridge multicast database attributes * [MDBA_MDB] = { * [MDBA_MDB_ENTRY] = {
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index 14c7c6a..57bbb35 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c@@ -23,6 +23,7 @@ #include <linux/if_ether.h> #include <linux/slab.h> #include <net/sock.h> +#include <linux/if_vlan.h> #include "br_private.h"
diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index dead9df..9cf2879 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c@@ -16,6 +16,7 @@ #include <net/rtnetlink.h> #include <net/net_namespace.h> #include <net/sock.h> +#include <uapi/linux/if_bridge.h> #include "br_private.h" #include "br_private_stp.h"
@@ -123,6 +124,9 @@ void br_ifinfo_notify(int event, struct net_bridge_port *port) struct sk_buff *skb; int err = -ENOBUFS; + if (!port) + return; + br_debug(port->br, "port %u(%s) event %d\n", (unsigned int)port->port_no, port->dev->name, event);
@@ -162,6 +166,60 @@ out: return err; } +const struct nla_policy ifla_br_policy[IFLA_MAX+1] = { + [IFLA_BRIDGE_FLAGS] = { .type = NLA_U16 }, + [IFLA_BRIDGE_MODE] = { .type = NLA_U16 }, + [IFLA_BRIDGE_VLAN_INFO] = { .type = NLA_BINARY, + .len = sizeof(struct bridge_vlan_info), }, +}; + +static int br_afspec(struct net_bridge *br, struct net_bridge_port *p, + struct nlattr *af_spec) +{ + struct nlattr *tb[IFLA_BRIDGE_MAX+1]; + int err = 0; + + if (nla_type(af_spec) != AF_BRIDGE) + return -EINVAL; + + err = nla_parse_nested(tb, IFLA_BRIDGE_MAX, af_spec, ifla_br_policy); + if (err) + return err; + + if (tb[IFLA_BRIDGE_VLAN_INFO]) { + struct bridge_vlan_info *vinfo; + + vinfo = nla_data(tb[IFLA_BRIDGE_VLAN_INFO]); + + if (vinfo->vid > VLAN_N_VID) + return -EINVAL; + + switch (vinfo->op_code) { + case BR_VLAN_ADD: + if (p) + err = nbp_vlan_add(p, vinfo->vid, vinfo->flags); + else { + u16 flags = vinfo->flags | BRIDGE_FLAGS_SELF; + if (!br_vlan_add(br, vinfo->vid, flags)) + err = -ENOMEM; + } + break; + + case BR_VLAN_DEL: + if (p) + err = nbp_vlan_delete(p, vinfo->vid, + vinfo->flags); + else { + u16 flags = vinfo->flags | BRIDGE_FLAGS_SELF; + err = br_vlan_delete(br, vinfo->vid, flags); + } + break; + } + } + + return err; +} + static const struct nla_policy ifla_brport_policy[IFLA_BRPORT_MAX + 1] = { [IFLA_BRPORT_STATE] = { .type = NLA_U8 }, [IFLA_BRPORT_COST] = { .type = NLA_U32 },
@@ -238,6 +296,7 @@ int br_setlink(struct net_device *dev, struct nlmsghdr *nlh) { struct ifinfomsg *ifm; struct nlattr *protinfo; + struct nlattr *afspec; struct net_bridge_port *p; struct nlattr *tb[IFLA_BRPORT_MAX + 1]; int err;
@@ -245,35 +304,49 @@ int br_setlink(struct net_device *dev, struct nlmsghdr *nlh) ifm = nlmsg_data(nlh); protinfo = nlmsg_find_attr(nlh, sizeof(*ifm), IFLA_PROTINFO); - if (!protinfo) + afspec = nlmsg_find_attr(nlh, sizeof(*ifm), IFLA_AF_SPEC); + if (!protinfo && !afspec) return 0; p = br_port_get_rtnl(dev); - if (!p) + /* We want to accept dev as bridge itself if the AF_SPEC + * is set to see if someone is setting vlan info on the brigde. + */ + if (!p && ((dev->priv_flags & IFF_EBRIDGE) && !afspec)) return -EINVAL; - if (protinfo->nla_type & NLA_F_NESTED) { - err = nla_parse_nested(tb, IFLA_BRPORT_MAX, - protinfo, ifla_brport_policy); + if (p && protinfo) { + if (protinfo->nla_type & NLA_F_NESTED) { + err = nla_parse_nested(tb, IFLA_BRPORT_MAX, + protinfo, ifla_brport_policy); + if (err) + return err; + + spin_lock_bh(&p->br->lock); + err = br_setport(p, tb); + spin_unlock_bh(&p->br->lock); + } else { + /* Binary compatability with old RSTP */ + if (nla_len(protinfo) < sizeof(u8)) + return -EINVAL; + + spin_lock_bh(&p->br->lock); + err = br_set_port_state(p, nla_get_u8(protinfo)); + spin_unlock_bh(&p->br->lock); + } if (err) - return err; - - spin_lock_bh(&p->br->lock); - err = br_setport(p, tb); - spin_unlock_bh(&p->br->lock); - } else { - /* Binary compatability with old RSTP */ - if (nla_len(protinfo) < sizeof(u8)) - return -EINVAL; + goto out; + } - spin_lock_bh(&p->br->lock); - err = br_set_port_state(p, nla_get_u8(protinfo)); - spin_unlock_bh(&p->br->lock); + if (afspec) { + err = br_afspec((struct net_bridge *)netdev_priv(dev), p, + afspec); } if (err == 0) br_ifinfo_notify(RTM_NEWLINK, p); +out: return err; }
--
1.7.7.6