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authorSantosh Shilimkar <santosh.shilimkar@oracle.com>2018-10-24 06:21:14 +0300
committerSantosh Shilimkar <santosh.shilimkar@oracle.com>2019-02-05 01:59:12 +0300
commit3eb450367d0823226515ee24712ed08eccb33eb9 (patch)
treed45c2920e6845dcd8a042c751c8b9dddcd48b913 /net/rds/af_rds.c
parentd021fabf525ffdaeb4e6f1cf50e1ba325ca5273b (diff)
downloadlinux-3eb450367d0823226515ee24712ed08eccb33eb9.tar.xz
rds: add type of service(tos) infrastructure
RDS Service type (TOS) is user-defined and needs to be configured via RDS IOCTL interface. It must be set before initiating any traffic and once set the TOS can not be changed. All out-going traffic from the socket will be associated with its TOS. Reviewed-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> [yanjun.zhu@oracle.com: Adapted original patch with ipv6 changes] Signed-off-by: Zhu Yanjun <yanjun.zhu@oracle.com>
Diffstat (limited to 'net/rds/af_rds.c')
-rw-r--r--net/rds/af_rds.c35
1 files changed, 34 insertions, 1 deletions
diff --git a/net/rds/af_rds.c b/net/rds/af_rds.c
index 65571a6273c3..904515858037 100644
--- a/net/rds/af_rds.c
+++ b/net/rds/af_rds.c
@@ -254,7 +254,38 @@ static __poll_t rds_poll(struct file *file, struct socket *sock,
static int rds_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
- return -ENOIOCTLCMD;
+ struct rds_sock *rs = rds_sk_to_rs(sock->sk);
+ rds_tos_t tos;
+
+ switch (cmd) {
+ case SIOCRDSSETTOS:
+ if (get_user(tos, (rds_tos_t __user *)arg))
+ return -EFAULT;
+
+ if (rs->rs_transport &&
+ rs->rs_transport->t_type == RDS_TRANS_TCP)
+ tos = 0;
+
+ spin_lock_bh(&rds_sock_lock);
+ if (rs->rs_tos || rs->rs_conn) {
+ spin_unlock_bh(&rds_sock_lock);
+ return -EINVAL;
+ }
+ rs->rs_tos = tos;
+ spin_unlock_bh(&rds_sock_lock);
+ break;
+ case SIOCRDSGETTOS:
+ spin_lock_bh(&rds_sock_lock);
+ tos = rs->rs_tos;
+ spin_unlock_bh(&rds_sock_lock);
+ if (put_user(tos, (rds_tos_t __user *)arg))
+ return -EFAULT;
+ break;
+ default:
+ return -ENOIOCTLCMD;
+ }
+
+ return 0;
}
static int rds_cancel_sent_to(struct rds_sock *rs, char __user *optval,
@@ -650,6 +681,8 @@ static int __rds_create(struct socket *sock, struct sock *sk, int protocol)
spin_lock_init(&rs->rs_rdma_lock);
rs->rs_rdma_keys = RB_ROOT;
rs->rs_rx_traces = 0;
+ rs->rs_tos = 0;
+ rs->rs_conn = NULL;
spin_lock_bh(&rds_sock_lock);
list_add_tail(&rs->rs_item, &rds_sock_list);