135 строки
3.2 KiB
C
135 строки
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/netdevice.h>
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#include <linux/rtnetlink.h>
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#include <linux/skbuff.h>
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#include <net/switchdev.h>
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#include "br_private.h"
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static int br_switchdev_mark_get(struct net_bridge *br, struct net_device *dev)
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{
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struct net_bridge_port *p;
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/* dev is yet to be added to the port list. */
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list_for_each_entry(p, &br->port_list, list) {
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if (switchdev_port_same_parent_id(dev, p->dev))
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return p->offload_fwd_mark;
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}
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return ++br->offload_fwd_mark;
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}
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int nbp_switchdev_mark_set(struct net_bridge_port *p)
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{
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struct switchdev_attr attr = {
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.orig_dev = p->dev,
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.id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
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};
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int err;
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ASSERT_RTNL();
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err = switchdev_port_attr_get(p->dev, &attr);
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if (err) {
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if (err == -EOPNOTSUPP)
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return 0;
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return err;
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}
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p->offload_fwd_mark = br_switchdev_mark_get(p->br, p->dev);
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return 0;
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}
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void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
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struct sk_buff *skb)
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{
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if (skb->offload_fwd_mark && !WARN_ON_ONCE(!p->offload_fwd_mark))
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BR_INPUT_SKB_CB(skb)->offload_fwd_mark = p->offload_fwd_mark;
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}
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bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
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const struct sk_buff *skb)
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{
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return !skb->offload_fwd_mark ||
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BR_INPUT_SKB_CB(skb)->offload_fwd_mark != p->offload_fwd_mark;
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}
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/* Flags that can be offloaded to hardware */
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#define BR_PORT_FLAGS_HW_OFFLOAD (BR_LEARNING | BR_FLOOD | \
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BR_MCAST_FLOOD | BR_BCAST_FLOOD)
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int br_switchdev_set_port_flag(struct net_bridge_port *p,
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unsigned long flags,
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unsigned long mask)
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{
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struct switchdev_attr attr = {
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.orig_dev = p->dev,
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.id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS_SUPPORT,
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};
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int err;
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if (mask & ~BR_PORT_FLAGS_HW_OFFLOAD)
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return 0;
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err = switchdev_port_attr_get(p->dev, &attr);
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if (err == -EOPNOTSUPP)
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return 0;
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if (err)
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return err;
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/* Check if specific bridge flag attribute offload is supported */
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if (!(attr.u.brport_flags_support & mask)) {
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br_warn(p->br, "bridge flag offload is not supported %u(%s)\n",
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(unsigned int)p->port_no, p->dev->name);
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return -EOPNOTSUPP;
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}
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attr.id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS;
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attr.flags = SWITCHDEV_F_DEFER;
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attr.u.brport_flags = flags;
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err = switchdev_port_attr_set(p->dev, &attr);
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if (err) {
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br_warn(p->br, "error setting offload flag on port %u(%s)\n",
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(unsigned int)p->port_no, p->dev->name);
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return err;
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}
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return 0;
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}
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static void
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br_switchdev_fdb_call_notifiers(bool adding, const unsigned char *mac,
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u16 vid, struct net_device *dev)
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{
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struct switchdev_notifier_fdb_info info;
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unsigned long notifier_type;
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info.addr = mac;
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info.vid = vid;
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notifier_type = adding ? SWITCHDEV_FDB_ADD_TO_DEVICE : SWITCHDEV_FDB_DEL_TO_DEVICE;
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call_switchdev_notifiers(notifier_type, dev, &info.info);
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}
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void
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br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
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{
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if (!fdb->added_by_user || !fdb->dst)
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return;
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switch (type) {
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case RTM_DELNEIGH:
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br_switchdev_fdb_call_notifiers(false, fdb->key.addr.addr,
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fdb->key.vlan_id,
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fdb->dst->dev);
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break;
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case RTM_NEWNEIGH:
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br_switchdev_fdb_call_notifiers(true, fdb->key.addr.addr,
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fdb->key.vlan_id,
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fdb->dst->dev);
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break;
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}
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}
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