From: David Ahern <d...@cumulusnetworks.com>
Date: Wed, 1 Jun 2016 21:14:54 -0700
> Add l3mdev rule per address family when the first VRF device is
> created. Remove them when the last is deleted.
>
> Signed-off-by: David Ahern <d...@cumulusnetworks.com>
> ---
> drivers/net/vrf.c | 114
> +++++++++++++++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 113 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/vrf.c b/drivers/net/vrf.c
> index dff08842f26d..b3cb80e84ea7 100644
> --- a/drivers/net/vrf.c
> +++ b/drivers/net/vrf.c
> @@ -35,6 +35,7 @@
> #include <net/route.h>
> #include <net/addrconf.h>
> #include <net/l3mdev.h>
> +#include <net/fib_rules.h>
>
> #define RT_FL_TOS(oldflp4) \
> ((oldflp4)->flowi4_tos & (IPTOS_RT_MASK | RTO_ONLINK))
> @@ -42,6 +43,11 @@
> #define DRV_NAME "vrf"
> #define DRV_VERSION "1.0"
>
> +static atomic_t num_vrfs;
> +
> +static u32 rule_pref = 1000;
> +module_param(rule_pref, uint, S_IRUGO);
> +
> struct net_vrf {
> struct rtable __rcu *rth;
> struct rt6_info __rcu *rt6;
> @@ -723,6 +729,93 @@ static const struct ethtool_ops vrf_ethtool_ops = {
> .get_drvinfo = vrf_get_drvinfo,
> };
>
> +static inline size_t vrf_fib_rule_nl_size(void)
> +{
> + size_t sz;
> +
> + sz = NLMSG_ALIGN(sizeof(struct fib_rule_hdr));
> + sz += nla_total_size(sizeof(u8)); /* FRA_L3MDEV */
> + sz += nla_total_size(sizeof(u32)); /* FRA_PRIORITY */
> +
> + return sz;
> +}
> +
> +static int vrf_fib_rule(const struct net_device *dev, __u8 family, bool
> add_it)
...
> +static void vrf_del_fib_rules(const struct net_device *dev)
> +{
> + if (vrf_fib_rule(dev, AF_INET, 0) ||
> + vrf_fib_rule(dev, AF_INET6, 0)) {
...
> +static int vrf_add_fib_rules(const struct net_device *dev)
> +{
> + int err;
> +
> + err = vrf_fib_rule(dev, AF_INET, 1);
> + if (err < 0)
> + goto out_err;
> +
> + err = vrf_fib_rule(dev, AF_INET6, 1);
Since the third arg to vrf_fib_rule() is a bool, pass true/false.
