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 struct netlink_ext_ack *extack) 65 { 66 struct switchdev_attr attr = { 67 .orig_dev = p->dev, 68 }; 69 struct switchdev_notifier_port_attr_info info = { 70 .attr = &attr, 71 }; 72 int err; 73 74 mask &= BR_PORT_FLAGS_HW_OFFLOAD; 75 if (!mask) 76 return 0; 77 78 attr.id = SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS; 79 attr.u.brport_flags.val = flags; 80 attr.u.brport_flags.mask = mask; 81 82 /* We run from atomic context here */ 83 err = call_switchdev_notifiers(SWITCHDEV_PORT_ATTR_SET, p->dev, 84 &info.info, extack); 85 err = notifier_to_errno(err); 86 if (err == -EOPNOTSUPP) 87 return 0; 88 89 if (err) { 90 if (extack && !extack->_msg) 91 NL_SET_ERR_MSG_MOD(extack, 92 "bridge flag offload is not supported"); 93 return -EOPNOTSUPP; 94 } 95 96 attr.id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS; 97 attr.flags = SWITCHDEV_F_DEFER; 98 99 err = switchdev_port_attr_set(p->dev, &attr, extack); 100 if (err) { 101 if (extack && !extack->_msg) 102 NL_SET_ERR_MSG_MOD(extack, 103 "error setting offload flag on port"); 104 return err; 105 } 106 107 return 0; 108 } 109 110 static void 111 br_switchdev_fdb_call_notifiers(bool adding, const unsigned char *mac, 112 u16 vid, struct net_device *dev, 113 bool added_by_user, bool offloaded) 114 { 115 struct switchdev_notifier_fdb_info info; 116 unsigned long notifier_type; 117 118 info.addr = mac; 119 info.vid = vid; 120 info.added_by_user = added_by_user; 121 info.offloaded = offloaded; 122 notifier_type = adding ? SWITCHDEV_FDB_ADD_TO_DEVICE : SWITCHDEV_FDB_DEL_TO_DEVICE; 123 call_switchdev_notifiers(notifier_type, dev, &info.info, NULL); 124 } 125 126 void 127 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type) 128 { 129 if (!fdb->dst) 130 return; 131 132 switch (type) { 133 case RTM_DELNEIGH: 134 br_switchdev_fdb_call_notifiers(false, fdb->key.addr.addr, 135 fdb->key.vlan_id, 136 fdb->dst->dev, 137 test_bit(BR_FDB_ADDED_BY_USER, 138 &fdb->flags), 139 test_bit(BR_FDB_OFFLOADED, 140 &fdb->flags)); 141 break; 142 case RTM_NEWNEIGH: 143 br_switchdev_fdb_call_notifiers(true, fdb->key.addr.addr, 144 fdb->key.vlan_id, 145 fdb->dst->dev, 146 test_bit(BR_FDB_ADDED_BY_USER, 147 &fdb->flags), 148 test_bit(BR_FDB_OFFLOADED, 149 &fdb->flags)); 150 break; 151 } 152 } 153 154 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 155 struct netlink_ext_ack *extack) 156 { 157 struct switchdev_obj_port_vlan v = { 158 .obj.orig_dev = dev, 159 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 160 .flags = flags, 161 .vid = vid, 162 }; 163 164 return switchdev_port_obj_add(dev, &v.obj, extack); 165 } 166 167 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 168 { 169 struct switchdev_obj_port_vlan v = { 170 .obj.orig_dev = dev, 171 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 172 .vid = vid, 173 }; 174 175 return switchdev_port_obj_del(dev, &v.obj); 176 } 177