From: Dragos Tatulea <dtatulea@xxxxxxxxxx>
[ Upstream commit dbc94a0fb81771a38733c0e8f2ea8c4fa6934dc1 ]
There are 2 ways to create IPoIB PKEY child interfaces:
1) Writing a PKEY to /sys/class/net/<ib parent interface>/create_child.
2) Using netlink with iproute.
While with sysfs the child interface has the same number of tx and
rx queues as the parent, with netlink there will always be 1 tx
and 1 rx queue for the child interface. That's because the
get_num_tx/rx_queues() netlink ops are missing and the default value
of 1 is taken for the number of queues (in rtnl_create_link()).
This change adds the get_num_tx/rx_queues() ops which allows for
interfaces with multiple queues to be created over netlink. This
constant only represents the max number of tx and rx queues on that
net device.
Fixes: 9baa0b036410 ("IB/ipoib: Add rtnl_link_ops support")
Signed-off-by: Dragos Tatulea <dtatulea@xxxxxxxxxx>
Link: https://lore.kernel.org/r/f4a42c8aa43c02d5ae5559a60c3e5e0f18c82531.1670485816.git.leonro@xxxxxxxxxx
Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/infiniband/ulp/ipoib/ipoib_netlink.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_netlink.c b/drivers/infiniband/ulp/ipoib/ipoib_netlink.c
index 5b05cf3837da..28e9b70844e4 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_netlink.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_netlink.c
@@ -42,6 +42,11 @@ static const struct nla_policy ipoib_policy[IFLA_IPOIB_MAX + 1] = {
[IFLA_IPOIB_UMCAST] = { .type = NLA_U16 },
};
+static unsigned int ipoib_get_max_num_queues(void)
+{
+ return min_t(unsigned int, num_possible_cpus(), 128);
+}
+
static int ipoib_fill_info(struct sk_buff *skb, const struct net_device *dev)
{
struct ipoib_dev_priv *priv = ipoib_priv(dev);
@@ -173,6 +178,8 @@ static struct rtnl_link_ops ipoib_link_ops __read_mostly = {
.changelink = ipoib_changelink,
.get_size = ipoib_get_size,
.fill_info = ipoib_fill_info,
+ .get_num_rx_queues = ipoib_get_max_num_queues,
+ .get_num_tx_queues = ipoib_get_max_num_queues,
};
struct rtnl_link_ops *ipoib_get_link_ops(void)
--
2.35.1
