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fib: introduce FIB info offload flag helpers

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These helpers are to be used in case someone offloads the FIB entry. The
result is that if the entry is offloaded to at least one device, the
offload flag is set.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2016-09-26 12:52:30 +02:00 committed by David S. Miller
parent b90eb75494
commit c98501879b
2 changed files with 15 additions and 2 deletions
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13
include/net/ip_fib.h
View File

@ -123,6 +123,7 @@ struct fib_info {
#ifdef CONFIG_IP_ROUTE_MULTIPATH
int fib_weight;
#endif
unsigned int fib_offload_cnt;
struct rcu_head rcu;
struct fib_nh fib_nh[0];
#define fib_dev fib_nh[0].nh_dev
@ -174,6 +175,18 @@ struct fib_result_nl {
__be32 fib_info_update_nh_saddr(struct net *net, struct fib_nh *nh);
static inline void fib_info_offload_inc(struct fib_info *fi)
{
fi->fib_offload_cnt++;
fi->fib_flags |= RTNH_F_OFFLOAD;
}
static inline void fib_info_offload_dec(struct fib_info *fi)
{
if (--fi->fib_offload_cnt == 0)
fi->fib_flags &= ~RTNH_F_OFFLOAD;
}
#define FIB_RES_SADDR(net, res) \
((FIB_RES_NH(res).nh_saddr_genid == \
atomic_read(&(net)->ipv4.dev_addr_genid)) ? \

4
net/switchdev/switchdev.c
View File

@ -1216,7 +1216,7 @@ int switchdev_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
ipv4_fib.obj.orig_dev = dev;
err = switchdev_port_obj_add(dev, &ipv4_fib.obj);
if (!err)
fi->fib_flags |= RTNH_F_OFFLOAD;
fib_info_offload_inc(fi);
return err == -EOPNOTSUPP ? 0 : err;
}
@ -1260,7 +1260,7 @@ int switchdev_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi,
ipv4_fib.obj.orig_dev = dev;
err = switchdev_port_obj_del(dev, &ipv4_fib.obj);
if (!err)
fi->fib_flags &= ~RTNH_F_OFFLOAD;
fib_info_offload_dec(fi);
return err == -EOPNOTSUPP ? 0 : err;
}