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authorXin Long <lucien.xin@gmail.com>2016-05-26 03:09:23 +0800
committerDavid S. Miller <davem@davemloft.net>2016-05-25 22:14:31 -0700
commitbed187b540167eb10320f6a2177604421650772e (patch)
tree53e185eb72e708916a3d3bfb66c1a9ce20223382 /net/sctp
parent3424d9be8f09649e6290d066c5c3cccff1c0ce77 (diff)
downloadlinux-bed187b540167eb10320f6a2177604421650772e.tar.bz2
sctp: fix double EPs display in sctp_diag
We have this situation: that EP hash table, contains only the EPs that are listening, while the transports one, has the opposite. We have to traverse both to dump all. But when we traverse the transports one we will also get EPs that are in the EP hash if they are listening. In this case, the EP is dumped twice. We will fix it by checking if the endpoint that is in the endpoint hash table contains any ep->asoc in there, as it means we will also find it via transport hash, and thus we can/should skip it, depending on the filters used, like 'ss -l'. Still, we should NOT skip it if the user is listing only listening endpoints, because then we are not traversing the transport hash. so we have to check idiag_states there also. Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp')
-rw-r--r--net/sctp/sctp_diag.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/sctp/sctp_diag.c b/net/sctp/sctp_diag.c
index 8e3e769dc9ea..1ce724b87618 100644
--- a/net/sctp/sctp_diag.c
+++ b/net/sctp/sctp_diag.c
@@ -356,6 +356,9 @@ static int sctp_ep_dump(struct sctp_endpoint *ep, void *p)
if (cb->args[4] < cb->args[1])
goto next;
+ if ((r->idiag_states & ~TCPF_LISTEN) && !list_empty(&ep->asocs))
+ goto next;
+
if (r->sdiag_family != AF_UNSPEC &&
sk->sk_family != r->sdiag_family)
goto next;