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_PRE_BRIDGE_FLAGS, 68 .u.brport_flags = mask, 69 }; 70 struct switchdev_notifier_port_attr_info info = { 71 .attr = &attr, 72 }; 73 int err; 74 75 if (mask & ~BR_PORT_FLAGS_HW_OFFLOAD) 76 return 0; 77 78 /* We run from atomic context here */ 79 err = call_switchdev_notifiers(SWITCHDEV_PORT_ATTR_SET, p->dev, 80 &info.info, NULL); 81 err = notifier_to_errno(err); 82 if (err == -EOPNOTSUPP) 83 return 0; 84 85 if (err) { 86 br_warn(p->br, "bridge flag offload is not supported %u(%s)\n", 87 (unsigned int)p->port_no, p->dev->name); 88 return -EOPNOTSUPP; 89 } 90 91 attr.id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS; 92 attr.flags = SWITCHDEV_F_DEFER; 93 attr.u.brport_flags = flags; 94 95 err = switchdev_port_attr_set(p->dev, &attr); 96 if (err) { 97 br_warn(p->br, "error setting offload flag on port %u(%s)\n", 98 (unsigned int)p->port_no, p->dev->name); 99 return err; 100 } 101 102 return 0; 103 } 104 105 static void 106 br_switchdev_fdb_call_notifiers(bool adding, const unsigned char *mac, 107 u16 vid, struct net_device *dev, 108 bool added_by_user, bool offloaded) 109 { 110 struct switchdev_notifier_fdb_info info; 111 unsigned long notifier_type; 112 113 info.addr = mac; 114 info.vid = vid; 115 info.added_by_user = added_by_user; 116 info.offloaded = offloaded; 117 notifier_type = adding ? SWITCHDEV_FDB_ADD_TO_DEVICE : SWITCHDEV_FDB_DEL_TO_DEVICE; 118 call_switchdev_notifiers(notifier_type, dev, &info.info, NULL); 119 } 120 121 void 122 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type) 123 { 124 if (!fdb->dst) 125 return; 126 127 switch (type) { 128 case RTM_DELNEIGH: 129 br_switchdev_fdb_call_notifiers(false, fdb->key.addr.addr, 130 fdb->key.vlan_id, 131 fdb->dst->dev, 132 test_bit(BR_FDB_ADDED_BY_USER, 133 &fdb->flags), 134 test_bit(BR_FDB_OFFLOADED, 135 &fdb->flags)); 136 break; 137 case RTM_NEWNEIGH: 138 br_switchdev_fdb_call_notifiers(true, fdb->key.addr.addr, 139 fdb->key.vlan_id, 140 fdb->dst->dev, 141 test_bit(BR_FDB_ADDED_BY_USER, 142 &fdb->flags), 143 test_bit(BR_FDB_OFFLOADED, 144 &fdb->flags)); 145 break; 146 } 147 } 148 149 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 150 struct netlink_ext_ack *extack) 151 { 152 struct switchdev_obj_port_vlan v = { 153 .obj.orig_dev = dev, 154 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 155 .flags = flags, 156 .vid_begin = vid, 157 .vid_end = vid, 158 }; 159 160 return switchdev_port_obj_add(dev, &v.obj, extack); 161 } 162 163 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 164 { 165 struct switchdev_obj_port_vlan v = { 166 .obj.orig_dev = dev, 167 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 168 .vid_begin = vid, 169 .vid_end = vid, 170 }; 171 172 return switchdev_port_obj_del(dev, &v.obj); 173 } 174