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tipc: Ignore broadcast acknowledgements that are out-of-range

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Adds checks to TIPC's broadcast link so that it ignores any
acknowledgement message containing a sequence number that does not
correspond to an unacknowledged message currently in the broadcast
link's transmit queue.

This change prevents the broadcast link from becoming stalled if a
newly booted node receives stale broadcast link acknowledgement
information from another node that has not yet fully synchronized
its end of the broadcast link to reflect the current state of the
new node's end.

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
This commit is contained in:
Allan Stephens
2011-10-24 15:26:24 -04:00
committed by Paul Gortmaker
parent 10745cd599
commit 3655959143
4 changed files with 37 additions and 13 deletions
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3
net/tipc/node.c
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@@ -351,8 +351,7 @@ static void node_lost_contact(struct tipc_node *n_ptr)
}
tipc_bclink_remove_node(n_ptr->addr);
tipc_bclink_acknowledge(n_ptr,
mod(n_ptr->bclink.acked + 10000));
tipc_bclink_acknowledge(n_ptr, INVALID_LINK_SEQ);
if (n_ptr->addr < tipc_own_addr)
tipc_own_tag--;