From c5bd4d85d356199ebdbc2c8bbfff86a292c65a9f Mon Sep 17 00:00:00 2001 From: Allan Stephens Date: Thu, 7 Apr 2011 11:58:08 -0400 Subject: tipc: Enhance cleanup of broadcast link when contact with node is lost Enhances cleanup of broadcast link-related information when contact with a node is lost. 1) All broadcast link-related cleanup now occurs only if the lost node was capable of communicating over the broadcast link. 2) Following cleanup, the lost node is marked as no longer supporting the broadcast link, ensuring that any remaining broadcast messages received from that node prior to the re-establishment of a normal communication link are ignored. Thanks to Surya [Suryanarayana.Garlapati@emerson.com] for contributing a prototype version of this patch. Signed-off-by: Allan Stephens Signed-off-by: Paul Gortmaker --- net/tipc/node.c | 32 ++++++++++++++++++-------------- 1 file changed, 18 insertions(+), 14 deletions(-) (limited to 'net/tipc/node.c') diff --git a/net/tipc/node.c b/net/tipc/node.c index 2d106ef4fa4c..810b39545264 100644 --- a/net/tipc/node.c +++ b/net/tipc/node.c @@ -331,28 +331,32 @@ static void node_lost_contact(struct tipc_node *n_ptr) char addr_string[16]; u32 i; - /* Clean up broadcast reception remains */ - n_ptr->bclink.gap_after = n_ptr->bclink.gap_to = 0; - while (n_ptr->bclink.deferred_head) { - struct sk_buff *buf = n_ptr->bclink.deferred_head; - n_ptr->bclink.deferred_head = buf->next; - buf_discard(buf); - } - if (n_ptr->bclink.defragm) { - buf_discard(n_ptr->bclink.defragm); - n_ptr->bclink.defragm = NULL; - } + info("Lost contact with %s\n", + tipc_addr_string_fill(addr_string, n_ptr->addr)); + + /* Flush broadcast link info associated with lost node */ if (n_ptr->bclink.supported) { + n_ptr->bclink.gap_after = n_ptr->bclink.gap_to = 0; + while (n_ptr->bclink.deferred_head) { + struct sk_buff *buf = n_ptr->bclink.deferred_head; + n_ptr->bclink.deferred_head = buf->next; + buf_discard(buf); + } + + if (n_ptr->bclink.defragm) { + buf_discard(n_ptr->bclink.defragm); + n_ptr->bclink.defragm = NULL; + } + tipc_bclink_acknowledge(n_ptr, mod(n_ptr->bclink.acked + 10000)); tipc_nmap_remove(&tipc_bcast_nmap, n_ptr->addr); if (n_ptr->addr < tipc_own_addr) tipc_own_tag--; - } - info("Lost contact with %s\n", - tipc_addr_string_fill(addr_string, n_ptr->addr)); + n_ptr->bclink.supported = 0; + } /* Abort link changeover */ for (i = 0; i < MAX_BEARERS; i++) { -- cgit v1.2.3