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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) { | |
17 | if (switchdev_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 switchdev_attr attr = { | |
27 | .orig_dev = p->dev, | |
28 | .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, | |
29 | }; | |
30 | int err; | |
31 | ||
32 | ASSERT_RTNL(); | |
33 | ||
34 | err = switchdev_port_attr_get(p->dev, &attr); | |
35 | if (err) { | |
36 | if (err == -EOPNOTSUPP) | |
37 | return 0; | |
38 | return err; | |
39 | } | |
40 | ||
41 | p->offload_fwd_mark = br_switchdev_mark_get(p->br, p->dev); | |
42 | ||
43 | return 0; | |
44 | } | |
45 | ||
46 | void nbp_switchdev_frame_mark(const struct net_bridge_port *p, | |
47 | struct sk_buff *skb) | |
48 | { | |
49 | if (skb->offload_fwd_mark && !WARN_ON_ONCE(!p->offload_fwd_mark)) | |
50 | BR_INPUT_SKB_CB(skb)->offload_fwd_mark = p->offload_fwd_mark; | |
51 | } | |
52 | ||
53 | bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, | |
54 | const struct sk_buff *skb) | |
55 | { | |
56 | return !skb->offload_fwd_mark || | |
57 | BR_INPUT_SKB_CB(skb)->offload_fwd_mark != p->offload_fwd_mark; | |
58 | } | |
3922285d AS |
59 | |
60 | /* Flags that can be offloaded to hardware */ | |
61 | #define BR_PORT_FLAGS_HW_OFFLOAD (BR_LEARNING | BR_FLOOD | \ | |
62 | BR_MCAST_FLOOD | BR_BCAST_FLOOD) | |
63 | ||
64 | int br_switchdev_set_port_flag(struct net_bridge_port *p, | |
65 | unsigned long flags, | |
66 | unsigned long mask) | |
67 | { | |
68 | struct switchdev_attr attr = { | |
69 | .orig_dev = p->dev, | |
70 | .id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS_SUPPORT, | |
71 | }; | |
72 | int err; | |
73 | ||
74 | if (mask & ~BR_PORT_FLAGS_HW_OFFLOAD) | |
75 | return 0; | |
76 | ||
77 | err = switchdev_port_attr_get(p->dev, &attr); | |
78 | if (err == -EOPNOTSUPP) | |
79 | return 0; | |
80 | if (err) | |
81 | return err; | |
82 | ||
83 | /* Check if specific bridge flag attribute offload is supported */ | |
84 | if (!(attr.u.brport_flags_support & mask)) { | |
85 | br_warn(p->br, "bridge flag offload is not supported %u(%s)\n", | |
86 | (unsigned int)p->port_no, p->dev->name); | |
87 | return -EOPNOTSUPP; | |
88 | } | |
89 | ||
90 | attr.id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS; | |
91 | attr.flags = SWITCHDEV_F_DEFER; | |
92 | attr.u.brport_flags = flags; | |
93 | err = switchdev_port_attr_set(p->dev, &attr); | |
94 | if (err) { | |
95 | br_warn(p->br, "error setting offload flag on port %u(%s)\n", | |
96 | (unsigned int)p->port_no, p->dev->name); | |
97 | return err; | |
98 | } | |
99 | ||
100 | return 0; | |
101 | } | |
6b26b51b AS |
102 | |
103 | static void | |
104 | br_switchdev_fdb_call_notifiers(bool adding, const unsigned char *mac, | |
105 | u16 vid, struct net_device *dev) | |
106 | { | |
107 | struct switchdev_notifier_fdb_info info; | |
108 | unsigned long notifier_type; | |
109 | ||
110 | info.addr = mac; | |
111 | info.vid = vid; | |
112 | notifier_type = adding ? SWITCHDEV_FDB_ADD_TO_DEVICE : SWITCHDEV_FDB_DEL_TO_DEVICE; | |
113 | call_switchdev_notifiers(notifier_type, dev, &info.info); | |
114 | } | |
115 | ||
116 | void | |
117 | br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type) | |
118 | { | |
ef9a5a62 | 119 | if (!fdb->added_by_user || !fdb->dst) |
6b26b51b AS |
120 | return; |
121 | ||
122 | switch (type) { | |
123 | case RTM_DELNEIGH: | |
eb793583 NA |
124 | br_switchdev_fdb_call_notifiers(false, fdb->key.addr.addr, |
125 | fdb->key.vlan_id, | |
6b26b51b AS |
126 | fdb->dst->dev); |
127 | break; | |
128 | case RTM_NEWNEIGH: | |
eb793583 NA |
129 | br_switchdev_fdb_call_notifiers(true, fdb->key.addr.addr, |
130 | fdb->key.vlan_id, | |
6b26b51b AS |
131 | fdb->dst->dev); |
132 | break; | |
133 | } | |
134 | } |