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authorMarcelo Ricardo Leitner <marcelo.leitner@gmail.com>2017-10-04 01:20:15 +0300
committerDavid S. Miller <davem@davemloft.net>2017-10-04 02:27:29 +0300
commit0ccdf3c7fdeda511b10def19505178a9d2d3fccd (patch)
tree1db44b2bd6edbce191461a3ee0cb3622e19de2ba /net/sctp/socket.c
parent13aa8770fe42d246c6f3a8eb814b85bccb428011 (diff)
downloadlinux-0ccdf3c7fdeda511b10def19505178a9d2d3fccd.tar.xz
sctp: add sockopt to get/set stream scheduler parameters
As defined per RFC Draft ndata Section 4.3.3, named as SCTP_STREAM_SCHEDULER_VALUE. See-also: https://tools.ietf.org/html/draft-ietf-tsvwg-sctp-ndata-13 Tested-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/socket.c')
-rw-r--r--net/sctp/socket.c77
1 files changed, 77 insertions, 0 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index ae35dbf2810f..88c28421ec15 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -3945,6 +3945,34 @@ out:
return retval;
}
+static int sctp_setsockopt_scheduler_value(struct sock *sk,
+ char __user *optval,
+ unsigned int optlen)
+{
+ struct sctp_association *asoc;
+ struct sctp_stream_value params;
+ int retval = -EINVAL;
+
+ if (optlen < sizeof(params))
+ goto out;
+
+ optlen = sizeof(params);
+ if (copy_from_user(&params, optval, optlen)) {
+ retval = -EFAULT;
+ goto out;
+ }
+
+ asoc = sctp_id2assoc(sk, params.assoc_id);
+ if (!asoc)
+ goto out;
+
+ retval = sctp_sched_set_value(asoc, params.stream_id,
+ params.stream_value, GFP_KERNEL);
+
+out:
+ return retval;
+}
+
/* API 6.2 setsockopt(), getsockopt()
*
* Applications use setsockopt() and getsockopt() to set or retrieve
@@ -4129,6 +4157,9 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
case SCTP_STREAM_SCHEDULER:
retval = sctp_setsockopt_scheduler(sk, optval, optlen);
break;
+ case SCTP_STREAM_SCHEDULER_VALUE:
+ retval = sctp_setsockopt_scheduler_value(sk, optval, optlen);
+ break;
default:
retval = -ENOPROTOOPT;
break;
@@ -6864,6 +6895,48 @@ out:
return retval;
}
+static int sctp_getsockopt_scheduler_value(struct sock *sk, int len,
+ char __user *optval,
+ int __user *optlen)
+{
+ struct sctp_stream_value params;
+ struct sctp_association *asoc;
+ int retval = -EFAULT;
+
+ if (len < sizeof(params)) {
+ retval = -EINVAL;
+ goto out;
+ }
+
+ len = sizeof(params);
+ if (copy_from_user(&params, optval, len))
+ goto out;
+
+ asoc = sctp_id2assoc(sk, params.assoc_id);
+ if (!asoc) {
+ retval = -EINVAL;
+ goto out;
+ }
+
+ retval = sctp_sched_get_value(asoc, params.stream_id,
+ &params.stream_value);
+ if (retval)
+ goto out;
+
+ if (put_user(len, optlen)) {
+ retval = -EFAULT;
+ goto out;
+ }
+
+ if (copy_to_user(optval, &params, len)) {
+ retval = -EFAULT;
+ goto out;
+ }
+
+out:
+ return retval;
+}
+
static int sctp_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen)
{
@@ -7050,6 +7123,10 @@ static int sctp_getsockopt(struct sock *sk, int level, int optname,
retval = sctp_getsockopt_scheduler(sk, len, optval,
optlen);
break;
+ case SCTP_STREAM_SCHEDULER_VALUE:
+ retval = sctp_getsockopt_scheduler_value(sk, len, optval,
+ optlen);
+ break;
default:
retval = -ENOPROTOOPT;
break;