From e9a034456a8cd766795610aa5065263147e35228 Mon Sep 17 00:00:00 2001 From: Jon Maloy Date: Fri, 12 Jan 2018 20:56:50 +0100 Subject: [PATCH] tipc: fix bug during lookup of multicast destination nodes In commit 232d07b74a33 ("tipc: improve groupcast scope handling") we inadvertently broke non-group multicast transmission when changing the parameter 'domain' to 'scope' in the function tipc_nametbl_lookup_dst_nodes(). We missed to make the corresponding change in the calling function, with the result that the lookup always fails. A closer anaysis reveals that this parameter is not needed at all. Non-group multicast is hard coded to use CLUSTER_SCOPE, and in the current implementation this will be delivered to all matching destinations except those which are published with NODE_SCOPE on other nodes. Since such publications never will be visible on the sending node anyway, it makes no sense to discriminate by scope at all. We now remove this parameter altogether. Signed-off-by: Jon Maloy Signed-off-by: David S. Miller --- net/tipc/name_table.c | 6 ++---- net/tipc/name_table.h | 3 +-- net/tipc/socket.c | 3 +-- 3 files changed, 4 insertions(+), 8 deletions(-) diff --git a/net/tipc/name_table.c b/net/tipc/name_table.c index 64cdd3c302b0..ed0457cc99d6 100644 --- a/net/tipc/name_table.c +++ b/net/tipc/name_table.c @@ -680,8 +680,7 @@ int tipc_nametbl_mc_lookup(struct net *net, u32 type, u32 lower, u32 upper, * - Determines if any node local ports overlap */ void tipc_nametbl_lookup_dst_nodes(struct net *net, u32 type, u32 lower, - u32 upper, u32 scope, - struct tipc_nlist *nodes) + u32 upper, struct tipc_nlist *nodes) { struct sub_seq *sseq, *stop; struct publication *publ; @@ -699,8 +698,7 @@ void tipc_nametbl_lookup_dst_nodes(struct net *net, u32 type, u32 lower, for (; sseq != stop && sseq->lower <= upper; sseq++) { info = sseq->info; list_for_each_entry(publ, &info->zone_list, zone_list) { - if (publ->scope == scope) - tipc_nlist_add(nodes, publ->node); + tipc_nlist_add(nodes, publ->node); } } spin_unlock_bh(&seq->lock); diff --git a/net/tipc/name_table.h b/net/tipc/name_table.h index b595d8aa00f0..f56e7cb3d436 100644 --- a/net/tipc/name_table.h +++ b/net/tipc/name_table.h @@ -105,8 +105,7 @@ int tipc_nametbl_mc_lookup(struct net *net, u32 type, u32 lower, u32 upper, void tipc_nametbl_build_group(struct net *net, struct tipc_group *grp, u32 type, u32 domain); void tipc_nametbl_lookup_dst_nodes(struct net *net, u32 type, u32 lower, - u32 upper, u32 domain, - struct tipc_nlist *nodes); + u32 upper, struct tipc_nlist *nodes); bool tipc_nametbl_lookup(struct net *net, u32 type, u32 instance, u32 domain, struct list_head *dsts, int *dstcnt, u32 exclude, bool all); diff --git a/net/tipc/socket.c b/net/tipc/socket.c index f38264db45ae..d799e50ff722 100644 --- a/net/tipc/socket.c +++ b/net/tipc/socket.c @@ -772,7 +772,6 @@ static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, struct net *net = sock_net(sk); int mtu = tipc_bcast_get_mtu(net); struct tipc_mc_method *method = &tsk->mc_method; - u32 domain = addr_domain(net, TIPC_CLUSTER_SCOPE); struct sk_buff_head pkts; struct tipc_nlist dsts; int rc; @@ -788,7 +787,7 @@ static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, /* Lookup destination nodes */ tipc_nlist_init(&dsts, tipc_own_addr(net)); tipc_nametbl_lookup_dst_nodes(net, seq->type, seq->lower, - seq->upper, domain, &dsts); + seq->upper, &dsts); if (!dsts.local && !dsts.remote) return -EHOSTUNREACH; -- GitLab