rds: add transport specific tos_map hook
RDMA transport maps user tos to underline virtual lanes(VL)
for IB or DSCP values. RDMA CM transport abstract thats for
RDS. TCP transport makes use of default priority 0 and maps
all user tos values to it.
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>
diff --git a/net/rds/af_rds.c b/net/rds/af_rds.c
index 9045158..d6cc97f 100644
--- a/net/rds/af_rds.c
+++ b/net/rds/af_rds.c
@@ -255,16 +255,18 @@ static __poll_t rds_poll(struct file *file, struct socket *sock,
static int rds_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
struct rds_sock *rs = rds_sk_to_rs(sock->sk);
- rds_tos_t tos;
+ rds_tos_t utos, tos = 0;
switch (cmd) {
case SIOCRDSSETTOS:
- if (get_user(tos, (rds_tos_t __user *)arg))
+ if (get_user(utos, (rds_tos_t __user *)arg))
return -EFAULT;
if (rs->rs_transport &&
- rs->rs_transport->t_type == RDS_TRANS_TCP)
- tos = 0;
+ rs->rs_transport->get_tos_map)
+ tos = rs->rs_transport->get_tos_map(utos);
+ else
+ return -ENOIOCTLCMD;
spin_lock_bh(&rds_sock_lock);
if (rs->rs_tos || rs->rs_conn) {