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| author | Allan Stephens <allan.stephens@windriver.com> | 2011-04-07 11:58:08 -0400 |
|---|---|---|
| committer | Paul Gortmaker <paul.gortmaker@windriver.com> | 2011-09-01 11:16:36 -0400 |
| commit | c5bd4d85d356199ebdbc2c8bbfff86a292c65a9f (patch) | |
| tree | 8bc891a81d612b20dd1841694cb52893e7347f8c /net/tipc/node.c | |
| parent | 23f0ff906af93be6edb579824474117b232c7cc0 (diff) | |
| download | linux-c5bd4d85d356199ebdbc2c8bbfff86a292c65a9f.tar.gz linux-c5bd4d85d356199ebdbc2c8bbfff86a292c65a9f.tar.bz2 linux-c5bd4d85d356199ebdbc2c8bbfff86a292c65a9f.zip | |
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>
Diffstat (limited to 'net/tipc/node.c')
| -rw-r--r-- | net/tipc/node.c | 32 |
1 files changed, 18 insertions, 14 deletions
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++) { |