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authorXin Long <lucien.xin@gmail.com>2016-07-09 19:47:42 +0800
committerDavid S. Miller <davem@davemloft.net>2016-07-11 13:25:39 -0700
commit826d253d57b11f69add81c8086d2e7f1dce5ec77 (patch)
treeb811d99d0748e7a3e84d39768e014f63adfa2d14 /net/sctp
parentf959fb442c35f4b61fea341401b8463dd0a1b959 (diff)
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sctp: add SCTP_PR_ASSOC_STATUS on sctp sockopt
This patch adds SCTP_PR_ASSOC_STATUS to sctp sockopt, which is used to dump the prsctp statistics info from the asoc. The prsctp statistics includes abandoned_sent/unsent from the asoc. abandoned_sent is the count of the packets we drop packets from retransmit/transmited queue, and abandoned_unsent is the count of the packets we drop from out_queue according to the policy. Note: another option for prsctp statistics dump described in rfc is SCTP_PR_STREAM_STATUS, which is used to dump the prsctp statistics info from each stream. But by now, linux doesn't yet have per stream statistics info, it needs rfc6525 to be implemented. As the prsctp statistics for each stream has to be based on per stream statistics, we will delay it until rfc6525 is done in linux. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp')
-rw-r--r--net/sctp/socket.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index c03fe1b76706..c3167c43a9c1 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -6330,6 +6330,64 @@ out:
return retval;
}
+static int sctp_getsockopt_pr_assocstatus(struct sock *sk, int len,
+ char __user *optval,
+ int __user *optlen)
+{
+ struct sctp_prstatus params;
+ struct sctp_association *asoc;
+ int policy;
+ int retval = -EINVAL;
+
+ if (len < sizeof(params))
+ goto out;
+
+ len = sizeof(params);
+ if (copy_from_user(&params, optval, len)) {
+ retval = -EFAULT;
+ goto out;
+ }
+
+ policy = params.sprstat_policy;
+ if (policy & ~SCTP_PR_SCTP_MASK)
+ goto out;
+
+ asoc = sctp_id2assoc(sk, params.sprstat_assoc_id);
+ if (!asoc)
+ goto out;
+
+ if (policy == SCTP_PR_SCTP_NONE) {
+ params.sprstat_abandoned_unsent = 0;
+ params.sprstat_abandoned_sent = 0;
+ for (policy = 0; policy <= SCTP_PR_INDEX(MAX); policy++) {
+ params.sprstat_abandoned_unsent +=
+ asoc->abandoned_unsent[policy];
+ params.sprstat_abandoned_sent +=
+ asoc->abandoned_sent[policy];
+ }
+ } else {
+ params.sprstat_abandoned_unsent =
+ asoc->abandoned_unsent[__SCTP_PR_INDEX(policy)];
+ params.sprstat_abandoned_sent =
+ asoc->abandoned_sent[__SCTP_PR_INDEX(policy)];
+ }
+
+ if (put_user(len, optlen)) {
+ retval = -EFAULT;
+ goto out;
+ }
+
+ if (copy_to_user(optval, &params, len)) {
+ retval = -EFAULT;
+ goto out;
+ }
+
+ retval = 0;
+
+out:
+ return retval;
+}
+
static int sctp_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen)
{
@@ -6490,6 +6548,10 @@ static int sctp_getsockopt(struct sock *sk, int level, int optname,
retval = sctp_getsockopt_default_prinfo(sk, len, optval,
optlen);
break;
+ case SCTP_PR_ASSOC_STATUS:
+ retval = sctp_getsockopt_pr_assocstatus(sk, len, optval,
+ optlen);
+ break;
default:
retval = -ENOPROTOOPT;
break;