l3mdev.c (9d066a252786e1a18484a6283f82614d42a9f4ac) l3mdev.c (0d240e7811c4ec1965760ee4643b5bbc9cfacbb3)
1/*
2 * net/l3mdev/l3mdev.c - L3 master device implementation
3 * Copyright (c) 2015 Cumulus Networks
4 * Copyright (c) 2015 David Ahern <dsa@cumulusnetworks.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 */
11
12#include <linux/netdevice.h>
1/*
2 * net/l3mdev/l3mdev.c - L3 master device implementation
3 * Copyright (c) 2015 Cumulus Networks
4 * Copyright (c) 2015 David Ahern <dsa@cumulusnetworks.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 */
11
12#include <linux/netdevice.h>
13#include <net/fib_rules.h>
13#include <net/l3mdev.h>
14
15/**
16 * l3mdev_master_ifindex - get index of L3 master device
17 * @dev: targeted interface
18 */
19
20int l3mdev_master_ifindex_rcu(const struct net_device *dev)

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102 * l3mdev_get_rt6_dst - IPv6 route lookup based on flow. Returns
103 * cached route for L3 master device if relevant
104 * to flow
105 * @net: network namespace for device index lookup
106 * @fl6: IPv6 flow struct for lookup
107 */
108
109struct dst_entry *l3mdev_get_rt6_dst(struct net *net,
14#include <net/l3mdev.h>
15
16/**
17 * l3mdev_master_ifindex - get index of L3 master device
18 * @dev: targeted interface
19 */
20
21int l3mdev_master_ifindex_rcu(const struct net_device *dev)

--- 81 unchanged lines hidden (view full) ---

103 * l3mdev_get_rt6_dst - IPv6 route lookup based on flow. Returns
104 * cached route for L3 master device if relevant
105 * to flow
106 * @net: network namespace for device index lookup
107 * @fl6: IPv6 flow struct for lookup
108 */
109
110struct dst_entry *l3mdev_get_rt6_dst(struct net *net,
110 const struct flowi6 *fl6)
111 struct flowi6 *fl6)
111{
112 struct dst_entry *dst = NULL;
113 struct net_device *dev;
114
115 if (fl6->flowi6_oif) {
116 rcu_read_lock();
117
118 dev = dev_get_by_index_rcu(net, fl6->flowi6_oif);

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155 rc = dev->l3mdev_ops->l3mdev_get_saddr(dev, fl4);
156
157 rcu_read_unlock();
158 }
159
160 return rc;
161}
162EXPORT_SYMBOL_GPL(l3mdev_get_saddr);
112{
113 struct dst_entry *dst = NULL;
114 struct net_device *dev;
115
116 if (fl6->flowi6_oif) {
117 rcu_read_lock();
118
119 dev = dev_get_by_index_rcu(net, fl6->flowi6_oif);

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156 rc = dev->l3mdev_ops->l3mdev_get_saddr(dev, fl4);
157
158 rcu_read_unlock();
159 }
160
161 return rc;
162}
163EXPORT_SYMBOL_GPL(l3mdev_get_saddr);
164
165int l3mdev_get_saddr6(struct net *net, const struct sock *sk,
166 struct flowi6 *fl6)
167{
168 struct net_device *dev;
169 int rc = 0;
170
171 if (fl6->flowi6_oif) {
172 rcu_read_lock();
173
174 dev = dev_get_by_index_rcu(net, fl6->flowi6_oif);
175 if (dev && netif_is_l3_slave(dev))
176 dev = netdev_master_upper_dev_get_rcu(dev);
177
178 if (dev && netif_is_l3_master(dev) &&
179 dev->l3mdev_ops->l3mdev_get_saddr6)
180 rc = dev->l3mdev_ops->l3mdev_get_saddr6(dev, sk, fl6);
181
182 rcu_read_unlock();
183 }
184
185 return rc;
186}
187EXPORT_SYMBOL_GPL(l3mdev_get_saddr6);
188
189/**
190 * l3mdev_fib_rule_match - Determine if flowi references an
191 * L3 master device
192 * @net: network namespace for device index lookup
193 * @fl: flow struct
194 */
195
196int l3mdev_fib_rule_match(struct net *net, struct flowi *fl,
197 struct fib_lookup_arg *arg)
198{
199 struct net_device *dev;
200 int rc = 0;
201
202 rcu_read_lock();
203
204 dev = dev_get_by_index_rcu(net, fl->flowi_oif);
205 if (dev && netif_is_l3_master(dev) &&
206 dev->l3mdev_ops->l3mdev_fib_table) {
207 arg->table = dev->l3mdev_ops->l3mdev_fib_table(dev);
208 rc = 1;
209 goto out;
210 }
211
212 dev = dev_get_by_index_rcu(net, fl->flowi_iif);
213 if (dev && netif_is_l3_master(dev) &&
214 dev->l3mdev_ops->l3mdev_fib_table) {
215 arg->table = dev->l3mdev_ops->l3mdev_fib_table(dev);
216 rc = 1;
217 goto out;
218 }
219
220out:
221 rcu_read_unlock();
222
223 return rc;
224}