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tipc: add functionality to lookup multicast destination nodes

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As a further preparation for the upcoming 'replicast' functionality,
we add some necessary structs and functions for looking up and returning
a list of all nodes that host destinations for a given multicast message.

Reviewed-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jon Paul Maloy
2017-01-18 13:50:51 -05:00
committed by David S. Miller
parent 9999974a83
commit 2ae0b8af1f
4 changed files with 87 additions and 8 deletions
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33
net/tipc/bcast.c
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@@ -39,9 +39,8 @@
#include "socket.h"
#include "msg.h"
#include "bcast.h"
#include "name_distr.h"
#include "link.h"
#include "node.h"
#include "name_table.h"
#define BCLINK_WIN_DEFAULT 50 /* bcast link window size (default) */
#define BCLINK_WIN_MIN 32 /* bcast minimum link window size */
@@ -434,3 +433,33 @@ void tipc_bcast_stop(struct net *net)
kfree(tn->bcbase);
kfree(tn->bcl);
}
void tipc_nlist_init(struct tipc_nlist *nl, u32 self)
{
memset(nl, 0, sizeof(*nl));
INIT_LIST_HEAD(&nl->list);
nl->self = self;
}
void tipc_nlist_add(struct tipc_nlist *nl, u32 node)
{
if (node == nl->self)
nl->local = true;
else if (u32_push(&nl->list, node))
nl->remote++;
}
void tipc_nlist_del(struct tipc_nlist *nl, u32 node)
{
if (node == nl->self)
nl->local = false;
else if (u32_del(&nl->list, node))
nl->remote--;
}
void tipc_nlist_purge(struct tipc_nlist *nl)
{
u32_list_purge(&nl->list);
nl->remote = 0;
nl->local = 0;
}