1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/kernel.h> 3 #include <linux/list.h> 4 #include <linux/netdevice.h> 5 #include <linux/rtnetlink.h> 6 #include <linux/skbuff.h> 7 #include <net/switchdev.h> 8 9 #include "br_private.h" 10 11 static int br_switchdev_mark_get(struct net_bridge *br, struct net_device *dev) 12 { 13 struct net_bridge_port *p; 14 15 /* dev is yet to be added to the port list. */ 16 list_for_each_entry(p, &br->port_list, list) { 17 if (netdev_port_same_parent_id(dev, p->dev)) 18 return p->offload_fwd_mark; 19 } 20 21 return ++br->offload_fwd_mark; 22 } 23 24 int nbp_switchdev_mark_set(struct net_bridge_port *p) 25 { 26 struct netdev_phys_item_id ppid = { }; 27 int err; 28 29 ASSERT_RTNL(); 30 31 err = dev_get_port_parent_id(p->dev, &ppid, true); 32 if (err) { 33 if (err == -EOPNOTSUPP) 34 return 0; 35 return err; 36 } 37 38 p->offload_fwd_mark = br_switchdev_mark_get(p->br, p->dev); 39 40 return 0; 41 } 42 43 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 44 struct sk_buff *skb) 45 { 46 if (skb->offload_fwd_mark && !WARN_ON_ONCE(!p->offload_fwd_mark)) 47 BR_INPUT_SKB_CB(skb)->offload_fwd_mark = p->offload_fwd_mark; 48 } 49 50 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 51 const struct sk_buff *skb) 52 { 53 return !skb->offload_fwd_mark || 54 BR_INPUT_SKB_CB(skb)->offload_fwd_mark != p->offload_fwd_mark; 55 } 56 57 /* Flags that can be offloaded to hardware */ 58 #define BR_PORT_FLAGS_HW_OFFLOAD (BR_LEARNING | BR_FLOOD | \ 59 BR_MCAST_FLOOD | BR_BCAST_FLOOD) 60 61 int br_switchdev_set_port_flag(struct net_bridge_port *p, 62 unsigned long flags, 63 unsigned long mask) 64 { 65 struct switchdev_attr attr = { 66 .orig_dev = p->dev, 67 .id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS_SUPPORT, 68 }; 69 int err; 70 71 if (mask & ~BR_PORT_FLAGS_HW_OFFLOAD) 72 return 0; 73 74 err = switchdev_port_attr_get(p->dev, &attr); 75 if (err == -EOPNOTSUPP) 76 return 0; 77 if (err) 78 return err; 79 80 /* Check if specific bridge flag attribute offload is supported */ 81 if (!(attr.u.brport_flags_support & mask)) { 82 br_warn(p->br, "bridge flag offload is not supported %u(%s)\n", 83 (unsigned int)p->port_no, p->dev->name); 84 return -EOPNOTSUPP; 85 } 86 87 attr.id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS; 88 attr.flags = SWITCHDEV_F_DEFER; 89 attr.u.brport_flags = flags; 90 err = switchdev_port_attr_set(p->dev, &attr); 91 if (err) { 92 br_warn(p->br, "error setting offload flag on port %u(%s)\n", 93 (unsigned int)p->port_no, p->dev->name); 94 return err; 95 } 96 97 return 0; 98 } 99 100 static void 101 br_switchdev_fdb_call_notifiers(bool adding, const unsigned char *mac, 102 u16 vid, struct net_device *dev, 103 bool added_by_user, bool offloaded) 104 { 105 struct switchdev_notifier_fdb_info info; 106 unsigned long notifier_type; 107 108 info.addr = mac; 109 info.vid = vid; 110 info.added_by_user = added_by_user; 111 info.offloaded = offloaded; 112 notifier_type = adding ? SWITCHDEV_FDB_ADD_TO_DEVICE : SWITCHDEV_FDB_DEL_TO_DEVICE; 113 call_switchdev_notifiers(notifier_type, dev, &info.info, NULL); 114 } 115 116 void 117 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type) 118 { 119 if (!fdb->dst) 120 return; 121 122 switch (type) { 123 case RTM_DELNEIGH: 124 br_switchdev_fdb_call_notifiers(false, fdb->key.addr.addr, 125 fdb->key.vlan_id, 126 fdb->dst->dev, 127 fdb->added_by_user, 128 fdb->offloaded); 129 break; 130 case RTM_NEWNEIGH: 131 br_switchdev_fdb_call_notifiers(true, fdb->key.addr.addr, 132 fdb->key.vlan_id, 133 fdb->dst->dev, 134 fdb->added_by_user, 135 fdb->offloaded); 136 break; 137 } 138 } 139 140 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 141 struct netlink_ext_ack *extack) 142 { 143 struct switchdev_obj_port_vlan v = { 144 .obj.orig_dev = dev, 145 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 146 .flags = flags, 147 .vid_begin = vid, 148 .vid_end = vid, 149 }; 150 151 return switchdev_port_obj_add(dev, &v.obj, extack); 152 } 153 154 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 155 { 156 struct switchdev_obj_port_vlan v = { 157 .obj.orig_dev = dev, 158 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 159 .vid_begin = vid, 160 .vid_end = vid, 161 }; 162 163 return switchdev_port_obj_del(dev, &v.obj); 164 } 165