[PATCH net-next 09/24] sctp: use SCTP_FUTURE_ASSOC for SCTP_RECONFIG_SUPPORTED sockopt

[Xin Long]

Check with SCTP_FUTURE_ASSOC instead in
sctp_set/getsockopt_reconfig_supported, it's compatible with 0.

It also adjusts some code to keep a same check form as other functions.

Signed-off-by: Xin Long <lucien....@gmail.com>
---
 net/sctp/socket.c | 27 ++++++++++++---------------
 1 file changed, 12 insertions(+), 15 deletions(-)

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 9e2b153..e5487a1 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -4041,15 +4041,14 @@ static int sctp_setsockopt_reconfig_supported(struct 
sock *sk,
        }
 
        asoc = sctp_id2assoc(sk, params.assoc_id);
-       if (asoc) {
-               asoc->reconf_enable = !!params.assoc_value;
-       } else if (!params.assoc_id) {
-               struct sctp_sock *sp = sctp_sk(sk);
-
-               sp->ep->reconf_enable = !!params.assoc_value;
-       } else {
+       if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
+           sctp_style(sk, UDP))
                goto out;
-       }
+
+       if (asoc)
+               asoc->reconf_enable = !!params.assoc_value;
+       else
+               sctp_sk(sk)->ep->reconf_enable = !!params.assoc_value;
 
        retval = 0;
 
@@ -7295,17 +7294,15 @@ static int sctp_getsockopt_reconfig_supported(struct 
sock *sk, int len,
                goto out;
 
        asoc = sctp_id2assoc(sk, params.assoc_id);
-       if (asoc) {
-               params.assoc_value = asoc->reconf_enable;
-       } else if (!params.assoc_id) {
-               struct sctp_sock *sp = sctp_sk(sk);
-
-               params.assoc_value = sp->ep->reconf_enable;
-       } else {
+       if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
+           sctp_style(sk, UDP)) {
                retval = -EINVAL;
                goto out;
        }
 
+       params.assoc_value = asoc ? asoc->reconf_enable
+                                 : sctp_sk(sk)->ep->reconf_enable;
+
        if (put_user(len, optlen))
                goto out;
 
-- 
2.1.0