Commit 494fff56 authored by Yuval Mintz's avatar Yuval Mintz Committed by David S. Miller
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ipmr, ip6mr: Make mfc_cache a common structure 



mfc_cache and mfc6_cache are almost identical - the main difference is
in the origin/group addresses and comparison-key. Make a common
structure encapsulating most of the multicast routing logic  - mr_mfc
and convert both ipmr and ip6mr into using it.

For easy conversion [casting, in this case] mr_mfc has to be the first
field inside every multicast routing abstraction utilizing it.

Signed-off-by: default avatarYuval Mintz <yuvalm@mellanox.com>
Acked-by: default avatarNikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 0bbbf0e7

drivers/net/ethernet/mellanox/mlxsw/spectrum_mr.c

+11 −10
Original line number Diff line number Diff line
@@ -126,8 +126,8 @@ mlxsw_sp_mr_route_ivif_in_evifs(const struct mlxsw_sp_mr_route *mr_route) 


	switch (mr_route->mr_table->proto) {

	case MLXSW_SP_L3_PROTO_IPV4:

		ivif = mr_route->mfc4->mfc_parent;

		return mr_route->mfc4->mfc_un.res.ttls[ivif] != 255;

		ivif = mr_route->mfc4->_c.mfc_parent;

		return mr_route->mfc4->_c.mfc_un.res.ttls[ivif] != 255;

	case MLXSW_SP_L3_PROTO_IPV6:

		/* fall through */

	default:
@@ -364,7 +364,7 @@ mlxsw_sp_mr_route4_create(struct mlxsw_sp_mr_table *mr_table, 
	mr_route->mfc4 = mfc;

	mr_route->mr_table = mr_table;

	for (i = 0; i < MAXVIFS; i++) {

		if (mfc->mfc_un.res.ttls[i] != 255) {

		if (mfc->_c.mfc_un.res.ttls[i] != 255) {

			err = mlxsw_sp_mr_route_evif_link(mr_route,

							  &mr_table->vifs[i]);

			if (err)
@@ -374,7 +374,8 @@ mlxsw_sp_mr_route4_create(struct mlxsw_sp_mr_table *mr_table, 
				mr_route->min_mtu = mr_table->vifs[i].dev->mtu;

		}

	}

	mlxsw_sp_mr_route_ivif_link(mr_route, &mr_table->vifs[mfc->mfc_parent]);

	mlxsw_sp_mr_route_ivif_link(mr_route,

				    &mr_table->vifs[mfc->_c.mfc_parent]);



	mr_route->route_action = mlxsw_sp_mr_route_action(mr_route);

	return mr_route;
@@ -418,9 +419,9 @@ static void mlxsw_sp_mr_mfc_offload_set(struct mlxsw_sp_mr_route *mr_route, 
	switch (mr_route->mr_table->proto) {

	case MLXSW_SP_L3_PROTO_IPV4:

		if (offload)

			mr_route->mfc4->mfc_flags |= MFC_OFFLOAD;

			mr_route->mfc4->_c.mfc_flags |= MFC_OFFLOAD;

		else

			mr_route->mfc4->mfc_flags &= ~MFC_OFFLOAD;

			mr_route->mfc4->_c.mfc_flags &= ~MFC_OFFLOAD;

		break;

	case MLXSW_SP_L3_PROTO_IPV6:

		/* fall through */
@@ -943,10 +944,10 @@ static void mlxsw_sp_mr_route_stats_update(struct mlxsw_sp *mlxsw_sp, 


	switch (mr_route->mr_table->proto) {

	case MLXSW_SP_L3_PROTO_IPV4:

		if (mr_route->mfc4->mfc_un.res.pkt != packets)

			mr_route->mfc4->mfc_un.res.lastuse = jiffies;

		mr_route->mfc4->mfc_un.res.pkt = packets;

		mr_route->mfc4->mfc_un.res.bytes = bytes;

		if (mr_route->mfc4->_c.mfc_un.res.pkt != packets)

			mr_route->mfc4->_c.mfc_un.res.lastuse = jiffies;

		mr_route->mfc4->_c.mfc_un.res.pkt = packets;

		mr_route->mfc4->_c.mfc_un.res.bytes = bytes;

		break;

	case MLXSW_SP_L3_PROTO_IPV6:

		/* fall through */

include/linux/mroute.h

+4 −41
Original line number Diff line number Diff line
@@ -81,28 +81,13 @@ struct mfc_cache_cmp_arg { 


/**

 * struct mfc_cache - multicast routing entries

 * @mnode: rhashtable list

 * @_c: Common multicast routing information; has to be first [for casting]

 * @mfc_mcastgrp: destination multicast group address

 * @mfc_origin: source address

 * @cmparg: used for rhashtable comparisons

 * @mfc_parent: source interface (iif)

 * @mfc_flags: entry flags

 * @expires: unresolved entry expire time

 * @unresolved: unresolved cached skbs

 * @last_assert: time of last assert

 * @minvif: minimum VIF id

 * @maxvif: maximum VIF id

 * @bytes: bytes that have passed for this entry

 * @pkt: packets that have passed for this entry

 * @wrong_if: number of wrong source interface hits

 * @lastuse: time of last use of the group (traffic or update)

 * @ttls: OIF TTL threshold array

 * @refcount: reference count for this entry

 * @list: global entry list

 * @rcu: used for entry destruction

 */

struct mfc_cache {

	struct rhlist_head mnode;

	struct mr_mfc _c;

	union {

		struct {

			__be32 mfc_mcastgrp;
@@ -110,28 +95,6 @@ struct mfc_cache { 
		};

		struct mfc_cache_cmp_arg cmparg;

	};

	vifi_t mfc_parent;

	int mfc_flags;



	union {

		struct {

			unsigned long expires;

			struct sk_buff_head unresolved;

		} unres;

		struct {

			unsigned long last_assert;

			int minvif;

			int maxvif;

			unsigned long bytes;

			unsigned long pkt;

			unsigned long wrong_if;

			unsigned long lastuse;

			unsigned char ttls[MAXVIFS];

			refcount_t refcount;

		} res;

	} mfc_un;

	struct list_head list;

	struct rcu_head	rcu;

};



struct mfc_entry_notifier_info {
@@ -155,12 +118,12 @@ static inline void ipmr_cache_free(struct mfc_cache *mfc_cache) 


static inline void ipmr_cache_put(struct mfc_cache *c)

{

	if (refcount_dec_and_test(&c->mfc_un.res.refcount))

	if (refcount_dec_and_test(&c->_c.mfc_un.res.refcount))

		ipmr_cache_free(c);

}

static inline void ipmr_cache_hold(struct mfc_cache *c)

{

	refcount_inc(&c->mfc_un.res.refcount);

	refcount_inc(&c->_c.mfc_un.res.refcount);

}



#endif

include/linux/mroute6.h

+1 −22
Original line number Diff line number Diff line
@@ -71,7 +71,7 @@ struct mfc6_cache_cmp_arg { 
};



struct mfc6_cache {

	struct rhlist_head mnode;

	struct mr_mfc _c;

	union {

		struct {

			struct in6_addr mf6c_mcastgrp;
@@ -79,27 +79,6 @@ struct mfc6_cache { 
		};

		struct mfc6_cache_cmp_arg cmparg;

	};

	mifi_t mf6c_parent;			/* Source interface		*/

	int mfc_flags;				/* Flags on line		*/



	union {

		struct {

			unsigned long expires;

			struct sk_buff_head unresolved;	/* Unresolved buffers		*/

		} unres;

		struct {

			unsigned long last_assert;

			int minvif;

			int maxvif;

			unsigned long bytes;

			unsigned long pkt;

			unsigned long wrong_if;

			unsigned long lastuse;

			unsigned char ttls[MAXMIFS];	/* TTL thresholds		*/

		} res;

	} mfc_un;

	struct list_head list;

	struct rcu_head rcu;

};



#define MFC_STATIC		1

include/linux/mroute_base.h

+45 −0
Original line number Diff line number Diff line
@@ -44,6 +44,51 @@ struct vif_device { 


#define VIF_EXISTS(_mrt, _idx) (!!((_mrt)->vif_table[_idx].dev))



/**

 * struct mr_mfc - common multicast routing entries

 * @mnode: rhashtable list

 * @mfc_parent: source interface (iif)

 * @mfc_flags: entry flags

 * @expires: unresolved entry expire time

 * @unresolved: unresolved cached skbs

 * @last_assert: time of last assert

 * @minvif: minimum VIF id

 * @maxvif: maximum VIF id

 * @bytes: bytes that have passed for this entry

 * @pkt: packets that have passed for this entry

 * @wrong_if: number of wrong source interface hits

 * @lastuse: time of last use of the group (traffic or update)

 * @ttls: OIF TTL threshold array

 * @refcount: reference count for this entry

 * @list: global entry list

 * @rcu: used for entry destruction

 */

struct mr_mfc {

	struct rhlist_head mnode;

	unsigned short mfc_parent;

	int mfc_flags;



	union {

		struct {

			unsigned long expires;

			struct sk_buff_head unresolved;

		} unres;

		struct {

			unsigned long last_assert;

			int minvif;

			int maxvif;

			unsigned long bytes;

			unsigned long pkt;

			unsigned long wrong_if;

			unsigned long lastuse;

			unsigned char ttls[MAXVIFS];

			refcount_t refcount;

		} res;

	} mfc_un;

	struct list_head list;

	struct rcu_head	rcu;

};



/**

 * struct mr_table - a multicast routing table

 * @list: entry within a list of multicast routing tables

net/ipv4/ipmr.c

+125 −108

File changed.

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