Commit | Line | Data |
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6bc506b4 IS |
1 | #include <linux/kernel.h> |
2 | #include <linux/list.h> | |
3 | #include <linux/netdevice.h> | |
4 | #include <linux/rtnetlink.h> | |
5 | #include <linux/skbuff.h> | |
6 | #include <net/switchdev.h> | |
7 | ||
8 | #include "br_private.h" | |
9 | ||
10 | static int br_switchdev_mark_get(struct net_bridge *br, struct net_device *dev) | |
11 | { | |
12 | struct net_bridge_port *p; | |
13 | ||
14 | /* dev is yet to be added to the port list. */ | |
15 | list_for_each_entry(p, &br->port_list, list) { | |
16 | if (switchdev_port_same_parent_id(dev, p->dev)) | |
17 | return p->offload_fwd_mark; | |
18 | } | |
19 | ||
20 | return ++br->offload_fwd_mark; | |
21 | } | |
22 | ||
23 | int nbp_switchdev_mark_set(struct net_bridge_port *p) | |
24 | { | |
25 | struct switchdev_attr attr = { | |
26 | .orig_dev = p->dev, | |
27 | .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, | |
28 | }; | |
29 | int err; | |
30 | ||
31 | ASSERT_RTNL(); | |
32 | ||
33 | err = switchdev_port_attr_get(p->dev, &attr); | |
34 | if (err) { | |
35 | if (err == -EOPNOTSUPP) | |
36 | return 0; | |
37 | return err; | |
38 | } | |
39 | ||
40 | p->offload_fwd_mark = br_switchdev_mark_get(p->br, p->dev); | |
41 | ||
42 | return 0; | |
43 | } | |
44 | ||
45 | void nbp_switchdev_frame_mark(const struct net_bridge_port *p, | |
46 | struct sk_buff *skb) | |
47 | { | |
48 | if (skb->offload_fwd_mark && !WARN_ON_ONCE(!p->offload_fwd_mark)) | |
49 | BR_INPUT_SKB_CB(skb)->offload_fwd_mark = p->offload_fwd_mark; | |
50 | } | |
51 | ||
52 | bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, | |
53 | const struct sk_buff *skb) | |
54 | { | |
55 | return !skb->offload_fwd_mark || | |
56 | BR_INPUT_SKB_CB(skb)->offload_fwd_mark != p->offload_fwd_mark; | |
57 | } | |
3922285d AS |
58 | |
59 | /* Flags that can be offloaded to hardware */ | |
60 | #define BR_PORT_FLAGS_HW_OFFLOAD (BR_LEARNING | BR_FLOOD | \ | |
61 | BR_MCAST_FLOOD | BR_BCAST_FLOOD) | |
62 | ||
63 | int br_switchdev_set_port_flag(struct net_bridge_port *p, | |
64 | unsigned long flags, | |
65 | unsigned long mask) | |
66 | { | |
67 | struct switchdev_attr attr = { | |
68 | .orig_dev = p->dev, | |
69 | .id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS_SUPPORT, | |
70 | }; | |
71 | int err; | |
72 | ||
73 | if (mask & ~BR_PORT_FLAGS_HW_OFFLOAD) | |
74 | return 0; | |
75 | ||
76 | err = switchdev_port_attr_get(p->dev, &attr); | |
77 | if (err == -EOPNOTSUPP) | |
78 | return 0; | |
79 | if (err) | |
80 | return err; | |
81 | ||
82 | /* Check if specific bridge flag attribute offload is supported */ | |
83 | if (!(attr.u.brport_flags_support & mask)) { | |
84 | br_warn(p->br, "bridge flag offload is not supported %u(%s)\n", | |
85 | (unsigned int)p->port_no, p->dev->name); | |
86 | return -EOPNOTSUPP; | |
87 | } | |
88 | ||
89 | attr.id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS; | |
90 | attr.flags = SWITCHDEV_F_DEFER; | |
91 | attr.u.brport_flags = flags; | |
92 | err = switchdev_port_attr_set(p->dev, &attr); | |
93 | if (err) { | |
94 | br_warn(p->br, "error setting offload flag on port %u(%s)\n", | |
95 | (unsigned int)p->port_no, p->dev->name); | |
96 | return err; | |
97 | } | |
98 | ||
99 | return 0; | |
100 | } |