sctp: add transport state in /proc/net/sctp/remaddr

It is often quite helpful to be able to know the state of a transport
outside of the application itself (for troubleshooting purposes or for
monitoring purposes). Add it under /proc/net/sctp/remaddr.

Signed-off-by: Michele Baldessari <michele@acksyn.org>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 2 deletions

diff --git a/net/sctp/proc.c b/net/sctp/proc.c
index 34229ee7f379..bfb242af06ab 100644
--- a/net/sctp/proc.c
+++ b/net/sctp/proc.c
@@ -417,7 +417,7 @@ static void *sctp_remaddr_seq_start(struct seq_file *seq, loff_t *pos)
 
         if (*pos == 0)
                 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
-                                "REM_ADDR_RTX  START\n");
+                                "REM_ADDR_RTX START STATE\n");
 
         return (void *)pos;
 }
@@ -497,7 +497,13 @@ static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
                          * currently implemented, but we can record it with a
                          * jiffies marker in a subsequent patch
                          */
-                        seq_printf(seq, "0");
+                        seq_printf(seq, "0 ");
+
+                        /*
+                         * The current state of this destination. I.e.
+                         * SCTP_ACTIVE, SCTP_INACTIVE, ...
+                         */
+                        seq_printf(seq, "%d", tsp->state);
 
                         seq_printf(seq, "\n");
                 }