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rds: add transport specific tos_map hook

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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>
This commit is contained in:
Santosh Shilimkar
2018-10-13 21:36:49 +08:00
parent 3eb450367d
commit 56dc8bce9f
4 changed files with 24 additions and 4 deletions
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10
net/rds/af_rds.c
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@@ -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) {