Hi, Jiri
On 2017/9/25 1:22, Jiri Pirko wrote:
> From: Yotam Gigi <yot...@mellanox.com>
>
> When the ipmr starts, it adds one default FIB rule that matches all packets
> and sends them to the DEFAULT (multicast) FIB table. A more complex rule
> can be added by user to specify that for a specific interface, a packet
> should be look up at either an arbitrary table or according to the l3mdev
> of the interface.
>
> For drivers willing to offload the ipmr logic into a hardware but don't
> want to offload all the FIB rules functionality, provide a function that
> can indicate whether the FIB rule is the default multicast rule, thus only
> one routing table is needed.
>
> This way, a driver can register to the FIB notification chain, get
> notifications about FIB rules added and trigger some kind of an internal
> abort mechanism when a non default rule is added by the user.
>
> Signed-off-by: Yotam Gigi <yot...@mellanox.com>
> Reviewed-by: Ido Schimmel <ido...@mellanox.com>
> Signed-off-by: Jiri Pirko <j...@mellanox.com>
> ---
> include/linux/mroute.h | 7 +++++++
> net/ipv4/ipmr.c | 10 ++++++++++
> 2 files changed, 17 insertions(+)
>
> diff --git a/include/linux/mroute.h b/include/linux/mroute.h
> index 5566580..b072a84 100644
> --- a/include/linux/mroute.h
> +++ b/include/linux/mroute.h
> @@ -5,6 +5,7 @@
> #include <linux/pim.h>
> #include <linux/rhashtable.h>
> #include <net/sock.h>
> +#include <net/fib_rules.h>
> #include <net/fib_notifier.h>
> #include <uapi/linux/mroute.h>
>
> @@ -19,6 +20,7 @@ int ip_mroute_getsockopt(struct sock *, int, char __user *,
> int __user *);
> int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg);
> int ipmr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg);
> int ip_mr_init(void);
> +bool ipmr_rule_default(const struct fib_rule *rule);
> #else
> static inline int ip_mroute_setsockopt(struct sock *sock, int optname,
> char __user *optval, unsigned int optlen)
> @@ -46,6 +48,11 @@ static inline int ip_mroute_opt(int opt)
> {
> return 0;
> }
> +
> +static inline bool ipmr_rule_default(const struct fib_rule *rule)
> +{
> + return true;
> +}
> #endif
>
> struct vif_device {
> diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
> index 2a795d2..a714f55 100644
> --- a/net/ipv4/ipmr.c
> +++ b/net/ipv4/ipmr.c
> @@ -320,6 +320,16 @@ static unsigned int ipmr_rules_seq_read(struct net *net)
> }
> #endif
>
> +bool ipmr_rule_default(const struct fib_rule *rule)
> +{
> +#if IS_ENABLED(CONFIG_FIB_RULES)
> + return fib_rule_matchall(rule) && rule->table == RT_TABLE_DEFAULT;
> +#else
> + return true;
> +#endif
In patch 02, You have the following, can you do the same for the above?
+#ifdef CONFIG_IP_MROUTE
+void ipmr_cache_free(struct mfc_cache *mfc_cache);
+#else
+static inline void ipmr_cache_free(struct mfc_cache *mfc_cache)
+{
+}
+#endif
> +}
> +EXPORT_SYMBOL(ipmr_rule_default);
> +
> static inline int ipmr_hash_cmp(struct rhashtable_compare_arg *arg,
> const void *ptr)
> {
>
