diff options
| author | Chang Xiangzhong <changxiangzhong@gmail.com> | 2013-11-14 00:58:26 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-11-14 22:35:09 +0100 |
| commit | d30a58ba2ef5092f10985d357d22acab232b6dcc (patch) | |
| tree | d77f00f64662b1c41bceda5083c123b55650e11e /net/sctp/associola.c | |
| parent | net-tcp: fix panic in tcp_fastopen_cache_set() (diff) | |
| download | linux-d30a58ba2ef5092f10985d357d22acab232b6dcc.tar.xz linux-d30a58ba2ef5092f10985d357d22acab232b6dcc.zip | |
net: sctp: bug-fixing: retran_path not set properly after transports recovering (v3)
When a transport recovers due to the new coming sack, SCTP should
iterate all of its transport_list to locate the __two__ most recently used
transport and set to active_path and retran_path respectively. The exising
code does not find the two properly - In case of the following list:
[most-recent] -> [2nd-most-recent] -> ...
Both active_path and retran_path would be set to the 1st element.
The bug happens when:
1) multi-homing
2) failure/partial_failure transport recovers
Both active_path and retran_path would be set to the same most-recent one, in
other words, retran_path would not take its role - an end user might not even
notice this issue.
Signed-off-by: Chang Xiangzhong <changxiangzhong@gmail.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/associola.c')
| -rw-r--r-- | net/sctp/associola.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/net/sctp/associola.c b/net/sctp/associola.c index c9b91cb1cb0d..68a27f9796d2 100644 --- a/net/sctp/associola.c +++ b/net/sctp/associola.c @@ -907,8 +907,8 @@ void sctp_assoc_control_transport(struct sctp_association *asoc, if (!first || t->last_time_heard > first->last_time_heard) { second = first; first = t; - } - if (!second || t->last_time_heard > second->last_time_heard) + } else if (!second || + t->last_time_heard > second->last_time_heard) second = t; } @@ -929,6 +929,8 @@ void sctp_assoc_control_transport(struct sctp_association *asoc, first = asoc->peer.primary_path; } + if (!second) + second = first; /* If we failed to find a usable transport, just camp on the * primary, even if it is inactive. */ |