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 <allan.stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/net/tipc/node.c b/net/tipc/node.c
index 2d106ef..810b395 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -331,28 +331,32 @@
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++) {