1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
// SPDX-License-Identifier: GPL-2.0
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/rtnetlink.h>
#include <linux/skbuff.h>
#include <net/switchdev.h>
#include "br_private.h"
void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
struct sk_buff *skb)
{
if (p->hwdom)
BR_INPUT_SKB_CB(skb)->src_hwdom = p->hwdom;
}
bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
const struct sk_buff *skb)
{
return !skb->offload_fwd_mark ||
BR_INPUT_SKB_CB(skb)->src_hwdom != p->hwdom;
}
/* Flags that can be offloaded to hardware */
#define BR_PORT_FLAGS_HW_OFFLOAD (BR_LEARNING | BR_FLOOD | \
BR_MCAST_FLOOD | BR_BCAST_FLOOD)
int br_switchdev_set_port_flag(struct net_bridge_port *p,
unsigned long flags,
unsigned long mask,
struct netlink_ext_ack *extack)
{
struct switchdev_attr attr = {
.orig_dev = p->dev,
};
struct switchdev_notifier_port_attr_info info = {
.attr = &attr,
};
int err;
mask &= BR_PORT_FLAGS_HW_OFFLOAD;
if (!mask)
return 0;
attr.id = SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS;
attr.u.brport_flags.val = flags;
attr.u.brport_flags.mask = mask;
/* We run from atomic context here */
err = call_switchdev_notifiers(SWITCHDEV_PORT_ATTR_SET, p->dev,
&info.info, extack);
err = notifier_to_errno(err);
if (err == -EOPNOTSUPP)
return 0;
if (err) {
if (extack && !extack->_msg)
NL_SET_ERR_MSG_MOD(extack,
"bridge flag offload is not supported");
return -EOPNOTSUPP;
}
attr.id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS;
attr.flags = SWITCHDEV_F_DEFER;
err = switchdev_port_attr_set(p->dev, &attr, extack);
if (err) {
if (extack && !extack->_msg)
NL_SET_ERR_MSG_MOD(extack,
"error setting offload flag on port");
return err;
}
return 0;
}
void
br_switchdev_fdb_notify(struct net_bridge *br,
const struct net_bridge_fdb_entry *fdb, int type)
{
const struct net_bridge_port *dst = READ_ONCE(fdb->dst);
struct net_device *dev = dst ? dst->dev : br->dev;
struct switchdev_notifier_fdb_info info = {
.addr = fdb->key.addr.addr,
.vid = fdb->key.vlan_id,
.added_by_user = test_bit(BR_FDB_ADDED_BY_USER, &fdb->flags),
.is_local = test_bit(BR_FDB_LOCAL, &fdb->flags),
.offloaded = test_bit(BR_FDB_OFFLOADED, &fdb->flags),
};
switch (type) {
case RTM_DELNEIGH:
call_switchdev_notifiers(SWITCHDEV_FDB_DEL_TO_DEVICE,
dev, &info.info, NULL);
break;
case RTM_NEWNEIGH:
call_switchdev_notifiers(SWITCHDEV_FDB_ADD_TO_DEVICE,
dev, &info.info, NULL);
break;
}
}
int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
struct netlink_ext_ack *extack)
{
struct switchdev_obj_port_vlan v = {
.obj.orig_dev = dev,
.obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
.flags = flags,
.vid = vid,
};
return switchdev_port_obj_add(dev, &v.obj, extack);
}
int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
{
struct switchdev_obj_port_vlan v = {
.obj.orig_dev = dev,
.obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
.vid = vid,
};
return switchdev_port_obj_del(dev, &v.obj);
}
static int nbp_switchdev_hwdom_set(struct net_bridge_port *joining)
{
struct net_bridge *br = joining->br;
struct net_bridge_port *p;
int hwdom;
/* joining is yet to be added to the port list. */
list_for_each_entry(p, &br->port_list, list) {
if (netdev_port_same_parent_id(joining->dev, p->dev)) {
joining->hwdom = p->hwdom;
return 0;
}
}
hwdom = find_next_zero_bit(&br->busy_hwdoms, BR_HWDOM_MAX, 1);
if (hwdom >= BR_HWDOM_MAX)
return -EBUSY;
set_bit(hwdom, &br->busy_hwdoms);
joining->hwdom = hwdom;
return 0;
}
static void nbp_switchdev_hwdom_put(struct net_bridge_port *leaving)
{
struct net_bridge *br = leaving->br;
struct net_bridge_port *p;
/* leaving is no longer in the port list. */
list_for_each_entry(p, &br->port_list, list) {
if (p->hwdom == leaving->hwdom)
return;
}
clear_bit(leaving->hwdom, &br->busy_hwdoms);
}
int nbp_switchdev_add(struct net_bridge_port *p)
{
struct netdev_phys_item_id ppid = { };
int err;
ASSERT_RTNL();
err = dev_get_port_parent_id(p->dev, &ppid, true);
if (err) {
if (err == -EOPNOTSUPP)
return 0;
return err;
}
return nbp_switchdev_hwdom_set(p);
}
void nbp_switchdev_del(struct net_bridge_port *p)
{
ASSERT_RTNL();
if (p->hwdom)
nbp_switchdev_hwdom_put(p);
}
|
