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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) { | |
bccb3025 | 17 | if (netdev_port_same_parent_id(dev, p->dev)) |
6bc506b4 IS |
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 | { | |
bccb3025 | 26 | struct netdev_phys_item_id ppid = { }; |
6bc506b4 IS |
27 | int err; |
28 | ||
29 | ASSERT_RTNL(); | |
30 | ||
bccb3025 | 31 | err = dev_get_port_parent_id(p->dev, &ppid, true); |
6bc506b4 IS |
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 | } | |
3922285d AS |
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, | |
1ef07644 FF |
67 | .id = SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS, |
68 | .u.brport_flags = mask, | |
3922285d | 69 | }; |
d45224d6 FF |
70 | struct switchdev_notifier_port_attr_info info = { |
71 | .attr = &attr, | |
72 | }; | |
3922285d AS |
73 | int err; |
74 | ||
75 | if (mask & ~BR_PORT_FLAGS_HW_OFFLOAD) | |
76 | return 0; | |
77 | ||
d45224d6 FF |
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); | |
3922285d AS |
82 | if (err == -EOPNOTSUPP) |
83 | return 0; | |
3922285d | 84 | |
1ef07644 | 85 | if (err) { |
3922285d AS |
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; | |
1ef07644 | 94 | |
3922285d AS |
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 | } | |
6b26b51b AS |
104 | |
105 | static void | |
106 | br_switchdev_fdb_call_notifiers(bool adding, const unsigned char *mac, | |
816a3bed | 107 | u16 vid, struct net_device *dev, |
e9ba0fbc | 108 | bool added_by_user, bool offloaded) |
6b26b51b AS |
109 | { |
110 | struct switchdev_notifier_fdb_info info; | |
111 | unsigned long notifier_type; | |
112 | ||
113 | info.addr = mac; | |
114 | info.vid = vid; | |
816a3bed | 115 | info.added_by_user = added_by_user; |
e9ba0fbc | 116 | info.offloaded = offloaded; |
6b26b51b | 117 | notifier_type = adding ? SWITCHDEV_FDB_ADD_TO_DEVICE : SWITCHDEV_FDB_DEL_TO_DEVICE; |
6685987c | 118 | call_switchdev_notifiers(notifier_type, dev, &info.info, NULL); |
6b26b51b AS |
119 | } |
120 | ||
121 | void | |
122 | br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type) | |
123 | { | |
161d82de | 124 | if (!fdb->dst) |
6b26b51b AS |
125 | return; |
126 | ||
127 | switch (type) { | |
128 | case RTM_DELNEIGH: | |
eb793583 NA |
129 | br_switchdev_fdb_call_notifiers(false, fdb->key.addr.addr, |
130 | fdb->key.vlan_id, | |
816a3bed | 131 | fdb->dst->dev, |
e9ba0fbc IS |
132 | fdb->added_by_user, |
133 | fdb->offloaded); | |
6b26b51b AS |
134 | break; |
135 | case RTM_NEWNEIGH: | |
eb793583 NA |
136 | br_switchdev_fdb_call_notifiers(true, fdb->key.addr.addr, |
137 | fdb->key.vlan_id, | |
816a3bed | 138 | fdb->dst->dev, |
e9ba0fbc IS |
139 | fdb->added_by_user, |
140 | fdb->offloaded); | |
6b26b51b AS |
141 | break; |
142 | } | |
143 | } | |
d66e4348 | 144 | |
169327d5 PM |
145 | int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, |
146 | struct netlink_ext_ack *extack) | |
d66e4348 PM |
147 | { |
148 | struct switchdev_obj_port_vlan v = { | |
149 | .obj.orig_dev = dev, | |
150 | .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, | |
151 | .flags = flags, | |
152 | .vid_begin = vid, | |
153 | .vid_end = vid, | |
154 | }; | |
155 | ||
69b7320e | 156 | return switchdev_port_obj_add(dev, &v.obj, extack); |
d66e4348 PM |
157 | } |
158 | ||
159 | int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) | |
160 | { | |
161 | struct switchdev_obj_port_vlan v = { | |
162 | .obj.orig_dev = dev, | |
163 | .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, | |
164 | .vid_begin = vid, | |
165 | .vid_end = vid, | |
166 | }; | |
167 | ||
168 | return switchdev_port_obj_del(dev, &v.obj); | |
169 | } |