[PATCH net] sctp: sctp_diag should dump sctp socket type

[Xin Long]

Now we cannot distinguish that one sk is a udp or sctp style when
we use ss to dump sctp_info. it's necessary to dump it as well.

For sctp_diag, ss support is not officially available, thus there
are no official users of this yet, so we can add this field in the
middle of sctp_info without breaking user API.

Signed-off-by: Xin Long <lucien....@gmail.com>
---
 include/linux/sctp.h | 1 +
 net/sctp/socket.c    | 1 +
 2 files changed, 2 insertions(+)

diff --git a/include/linux/sctp.h b/include/linux/sctp.h
index dacb5e7..3a406af 100644
--- a/include/linux/sctp.h
+++ b/include/linux/sctp.h
@@ -761,6 +761,7 @@ struct sctp_info {
        __u32   sctpi_s_autoclose;
        __u32   sctpi_s_adaptation_ind;
        __u32   sctpi_s_pd_point;
+       __u32   sctpi_s_type;
        __u8    sctpi_s_nodelay;
        __u8    sctpi_s_disable_fragments;
        __u8    sctpi_s_v4mapped;
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 777d032..ebb8e41 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -4216,6 +4216,7 @@ int sctp_get_sctp_info(struct sock *sk, struct 
sctp_association *asoc,
                info->sctpi_s_autoclose = sp->autoclose;
                info->sctpi_s_adaptation_ind = sp->adaptation_ind;
                info->sctpi_s_pd_point = sp->pd_point;
+               info->sctpi_s_type = sp->type;
                info->sctpi_s_nodelay = sp->nodelay;
                info->sctpi_s_disable_fragments = sp->disable_fragments;
                info->sctpi_s_v4mapped = sp->v4mapped;
-- 
2.1.0