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Message-Id: <1427962212-18411-10-git-send-email-sfeldma@gmail.com>
Date: Thu, 2 Apr 2015 01:09:55 -0700
From: sfeldma@...il.com
To: netdev@...r.kernel.org
Cc: jiri@...nulli.us, roopa@...ulusnetworks.com, linux@...ck-us.net,
f.fainelli@...il.com, sridhar.samudrala@...el.com,
ronen.arad@...el.com
Subject: [PATCH net-next v3 09/26] switchdev: add new swdev bridge setlink
From: Scott Feldman <sfeldma@...il.com>
Add new swdev_port_bridge_setlink that can be used by drivers implementing
.ndo_bridge_setlink to set swdev bridge attributes. Basically turn the raw
rtnl_bridge_setlink netlink into swdev attr sets. Proper netlink attr policy
checking is done on the protinfo part of the netlink msg.
Currently, for protinfo, only bridge port attrs BR_LEARNING and
BR_LEARNING_SYNC are parsed and passed to port driver.
For afspec, VLAN objs are passed so swdev driver can set VLANs assigned to
SELF. To illustrate with iproute2 cmd, we have:
bridge vlan add vid 10 dev sw1p1 self master
To add VLAN 10 to port sw1p1 for both the bridge (master) and the device
(self).
Signed-off-by: Scott Feldman <sfeldma@...il.com>
---
include/net/switchdev.h | 8 +++
net/switchdev/switchdev.c | 150 +++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 158 insertions(+)
diff --git a/include/net/switchdev.h b/include/net/switchdev.h
index 2128037..22f3dac 100644
--- a/include/net/switchdev.h
+++ b/include/net/switchdev.h
@@ -115,6 +115,8 @@ int swdev_port_attr_get(struct net_device *dev, struct swdev_attr *attr);
int swdev_port_attr_set(struct net_device *dev, struct swdev_attr *attr);
int swdev_port_obj_add(struct net_device *dev, struct swdev_obj *obj);
int swdev_port_obj_del(struct net_device *dev, struct swdev_obj *obj);
+int swdev_port_bridge_setlink(struct net_device *dev, struct nlmsghdr *nlh,
+ u16 flags);
int register_netdev_switch_notifier(struct notifier_block *nb);
int unregister_netdev_switch_notifier(struct notifier_block *nb);
int call_netdev_switch_notifiers(unsigned long val, struct net_device *dev,
@@ -159,6 +161,12 @@ static inline int swdev_port_obj_del(struct net_device *dev,
return -EOPNOTSUPP;
}
+static inline int swdev_port_bridge_setlink(struct net_device *dev,
+ struct nlmsghdr *nlh, u16 flags)
+{
+ return -EOPNOTSUPP;
+}
+
static inline int register_netdev_switch_notifier(struct notifier_block *nb)
{
return 0;
diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c
index f389e91..5709563 100644
--- a/net/switchdev/switchdev.c
+++ b/net/switchdev/switchdev.c
@@ -15,6 +15,7 @@
#include <linux/mutex.h>
#include <linux/notifier.h>
#include <linux/netdevice.h>
+#include <linux/if_bridge.h>
#include <net/ip_fib.h>
#include <net/switchdev.h>
@@ -341,6 +342,155 @@ int netdev_switch_port_bridge_setlink(struct net_device *dev,
}
EXPORT_SYMBOL_GPL(netdev_switch_port_bridge_setlink);
+static int swdev_port_br_setflag(struct net_device *dev, struct nlattr *nlattr,
+ unsigned long brport_flag)
+{
+ struct swdev_attr attr = {
+ .id = SWDEV_ATTR_PORT_BRIDGE_FLAGS,
+ };
+ u8 flag = nla_get_u8(nlattr);
+ int err;
+
+ err = swdev_port_attr_get(dev, &attr);
+ if (err)
+ return err;
+
+ if (flag)
+ attr.brport_flags |= brport_flag;
+ else
+ attr.brport_flags &= ~brport_flag;
+
+ return swdev_port_attr_set(dev, &attr);
+}
+
+static const struct nla_policy swdev_port_bridge_policy[IFLA_BRPORT_MAX + 1] = {
+ [IFLA_BRPORT_STATE] = { .type = NLA_U8 },
+ [IFLA_BRPORT_COST] = { .type = NLA_U32 },
+ [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 },
+ [IFLA_BRPORT_MODE] = { .type = NLA_U8 },
+ [IFLA_BRPORT_GUARD] = { .type = NLA_U8 },
+ [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 },
+ [IFLA_BRPORT_FAST_LEAVE] = { .type = NLA_U8 },
+ [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 },
+ [IFLA_BRPORT_LEARNING_SYNC] = { .type = NLA_U8 },
+ [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
+};
+
+static int swdev_port_br_protinfo(struct net_device *dev,
+ struct nlattr *protinfo)
+{
+ struct nlattr *attr;
+ int rem;
+ int err;
+
+ err = nla_validate_nested(protinfo, IFLA_BRPORT_MAX,
+ swdev_port_bridge_policy);
+ if (err)
+ return err;
+
+ nla_for_each_nested(attr, protinfo, rem) {
+ switch (nla_type(attr)) {
+ case IFLA_BRPORT_LEARNING:
+ err = swdev_port_br_setflag(dev, attr,
+ BR_LEARNING);
+ break;
+ case IFLA_BRPORT_LEARNING_SYNC:
+ err = swdev_port_br_setflag(dev, attr,
+ BR_LEARNING_SYNC);
+ break;
+ default:
+ err = -EOPNOTSUPP;
+ break;
+ }
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int swdev_port_br_afspec(struct net_device *dev, struct nlattr *afspec,
+ int (*f)(struct net_device *dev,
+ struct swdev_obj *obj))
+{
+ struct nlattr *attr;
+ struct bridge_vlan_info *vinfo;
+ struct swdev_obj obj = {
+ .id = SWDEV_OBJ_PORT_VLAN,
+ };
+ int rem;
+ int err;
+
+ nla_for_each_nested(attr, afspec, rem) {
+ if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO)
+ continue;
+ if (nla_len(attr) != sizeof(struct bridge_vlan_info))
+ return -EINVAL;
+ vinfo = nla_data(attr);
+ obj.vlan.flags = vinfo->flags;
+ if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
+ if (obj.vlan.vid_start)
+ return -EINVAL;
+ obj.vlan.vid_start = vinfo->vid;
+ } else if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END) {
+ if (!obj.vlan.vid_start)
+ return -EINVAL;
+ obj.vlan.vid_end = vinfo->vid;
+ if (obj.vlan.vid_end <= obj.vlan.vid_start)
+ return -EINVAL;
+ err = f(dev, &obj);
+ if (err)
+ return err;
+ memset(&obj.vlan, 0, sizeof(obj.vlan));
+ } else {
+ if (obj.vlan.vid_start)
+ return -EINVAL;
+ obj.vlan.vid_start = vinfo->vid;
+ obj.vlan.vid_end = vinfo->vid;
+ err = f(dev, &obj);
+ if (err)
+ return err;
+ memset(&obj.vlan, 0, sizeof(obj.vlan));
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * swdev_port_bridge_setlink - Set bridge port attributes
+ *
+ * @dev: port device
+ * @nlh: netlink header
+ * @flags: netlink flags
+ *
+ * Called for SELF on rtnl_bridge_setlink to set bridge port
+ * attributes.
+ */
+int swdev_port_bridge_setlink(struct net_device *dev,
+ struct nlmsghdr *nlh, u16 flags)
+{
+ struct nlattr *protinfo;
+ struct nlattr *afspec;
+ int err = 0;
+
+ protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg),
+ IFLA_PROTINFO);
+ if (protinfo) {
+ err = swdev_port_br_protinfo(dev, protinfo);
+ if (err)
+ return err;
+ }
+
+ afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg),
+ IFLA_AF_SPEC);
+ if (afspec)
+ err = swdev_port_br_afspec(dev, afspec, swdev_port_obj_add);
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(swdev_port_bridge_setlink);
+
/**
* netdev_switch_port_bridge_dellink - Notify switch device port of bridge
* port attribute delete
--
1.7.10.4
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