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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
6bc506b4 IS |
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) { | |
d6abc596 FF |
17 | if (netdev_port_same_parent_id(dev, p->dev) || |
18 | switchdev_port_same_parent_id(dev, p->dev)) | |
6bc506b4 IS |
19 | return p->offload_fwd_mark; |
20 | } | |
21 | ||
22 | return ++br->offload_fwd_mark; | |
23 | } | |
24 | ||
25 | int nbp_switchdev_mark_set(struct net_bridge_port *p) | |
26 | { | |
d6abc596 | 27 | const struct net_device_ops *ops = p->dev->netdev_ops; |
6bc506b4 IS |
28 | struct switchdev_attr attr = { |
29 | .orig_dev = p->dev, | |
30 | .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, | |
31 | }; | |
32 | int err; | |
33 | ||
34 | ASSERT_RTNL(); | |
35 | ||
d6abc596 FF |
36 | if (ops->ndo_get_port_parent_id) |
37 | err = dev_get_port_parent_id(p->dev, &attr.u.ppid, true); | |
38 | else | |
39 | err = switchdev_port_attr_get(p->dev, &attr); | |
6bc506b4 IS |
40 | if (err) { |
41 | if (err == -EOPNOTSUPP) | |
42 | return 0; | |
43 | return err; | |
44 | } | |
45 | ||
46 | p->offload_fwd_mark = br_switchdev_mark_get(p->br, p->dev); | |
47 | ||
48 | return 0; | |
49 | } | |
50 | ||
51 | void nbp_switchdev_frame_mark(const struct net_bridge_port *p, | |
52 | struct sk_buff *skb) | |
53 | { | |
54 | if (skb->offload_fwd_mark && !WARN_ON_ONCE(!p->offload_fwd_mark)) | |
55 | BR_INPUT_SKB_CB(skb)->offload_fwd_mark = p->offload_fwd_mark; | |
56 | } | |
57 | ||
58 | bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, | |
59 | const struct sk_buff *skb) | |
60 | { | |
61 | return !skb->offload_fwd_mark || | |
62 | BR_INPUT_SKB_CB(skb)->offload_fwd_mark != p->offload_fwd_mark; | |
63 | } | |
3922285d AS |
64 | |
65 | /* Flags that can be offloaded to hardware */ | |
66 | #define BR_PORT_FLAGS_HW_OFFLOAD (BR_LEARNING | BR_FLOOD | \ | |
67 | BR_MCAST_FLOOD | BR_BCAST_FLOOD) | |
68 | ||
69 | int br_switchdev_set_port_flag(struct net_bridge_port *p, | |
70 | unsigned long flags, | |
71 | unsigned long mask) | |
72 | { | |
73 | struct switchdev_attr attr = { | |
74 | .orig_dev = p->dev, | |
75 | .id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS_SUPPORT, | |
76 | }; | |
77 | int err; | |
78 | ||
79 | if (mask & ~BR_PORT_FLAGS_HW_OFFLOAD) | |
80 | return 0; | |
81 | ||
82 | err = switchdev_port_attr_get(p->dev, &attr); | |
83 | if (err == -EOPNOTSUPP) | |
84 | return 0; | |
85 | if (err) | |
86 | return err; | |
87 | ||
88 | /* Check if specific bridge flag attribute offload is supported */ | |
89 | if (!(attr.u.brport_flags_support & mask)) { | |
90 | br_warn(p->br, "bridge flag offload is not supported %u(%s)\n", | |
91 | (unsigned int)p->port_no, p->dev->name); | |
92 | return -EOPNOTSUPP; | |
93 | } | |
94 | ||
95 | attr.id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS; | |
96 | attr.flags = SWITCHDEV_F_DEFER; | |
97 | attr.u.brport_flags = flags; | |
98 | err = switchdev_port_attr_set(p->dev, &attr); | |
99 | if (err) { | |
100 | br_warn(p->br, "error setting offload flag on port %u(%s)\n", | |
101 | (unsigned int)p->port_no, p->dev->name); | |
102 | return err; | |
103 | } | |
104 | ||
105 | return 0; | |
106 | } | |
6b26b51b AS |
107 | |
108 | static void | |
109 | br_switchdev_fdb_call_notifiers(bool adding, const unsigned char *mac, | |
816a3bed | 110 | u16 vid, struct net_device *dev, |
e9ba0fbc | 111 | bool added_by_user, bool offloaded) |
6b26b51b AS |
112 | { |
113 | struct switchdev_notifier_fdb_info info; | |
114 | unsigned long notifier_type; | |
115 | ||
116 | info.addr = mac; | |
117 | info.vid = vid; | |
816a3bed | 118 | info.added_by_user = added_by_user; |
e9ba0fbc | 119 | info.offloaded = offloaded; |
6b26b51b | 120 | notifier_type = adding ? SWITCHDEV_FDB_ADD_TO_DEVICE : SWITCHDEV_FDB_DEL_TO_DEVICE; |
6685987c | 121 | call_switchdev_notifiers(notifier_type, dev, &info.info, NULL); |
6b26b51b AS |
122 | } |
123 | ||
124 | void | |
125 | br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type) | |
126 | { | |
161d82de | 127 | if (!fdb->dst) |
6b26b51b AS |
128 | return; |
129 | ||
130 | switch (type) { | |
131 | case RTM_DELNEIGH: | |
eb793583 NA |
132 | br_switchdev_fdb_call_notifiers(false, fdb->key.addr.addr, |
133 | fdb->key.vlan_id, | |
816a3bed | 134 | fdb->dst->dev, |
e9ba0fbc IS |
135 | fdb->added_by_user, |
136 | fdb->offloaded); | |
6b26b51b AS |
137 | break; |
138 | case RTM_NEWNEIGH: | |
eb793583 NA |
139 | br_switchdev_fdb_call_notifiers(true, fdb->key.addr.addr, |
140 | fdb->key.vlan_id, | |
816a3bed | 141 | fdb->dst->dev, |
e9ba0fbc IS |
142 | fdb->added_by_user, |
143 | fdb->offloaded); | |
6b26b51b AS |
144 | break; |
145 | } | |
146 | } | |
d66e4348 | 147 | |
169327d5 PM |
148 | int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, |
149 | struct netlink_ext_ack *extack) | |
d66e4348 PM |
150 | { |
151 | struct switchdev_obj_port_vlan v = { | |
152 | .obj.orig_dev = dev, | |
153 | .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, | |
154 | .flags = flags, | |
155 | .vid_begin = vid, | |
156 | .vid_end = vid, | |
157 | }; | |
158 | ||
69b7320e | 159 | return switchdev_port_obj_add(dev, &v.obj, extack); |
d66e4348 PM |
160 | } |
161 | ||
162 | int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) | |
163 | { | |
164 | struct switchdev_obj_port_vlan v = { | |
165 | .obj.orig_dev = dev, | |
166 | .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, | |
167 | .vid_begin = vid, | |
168 | .vid_end = vid, | |
169 | }; | |
170 | ||
171 | return switchdev_port_obj_del(dev, &v.obj); | |
172 | } |