[PATCH 2/2] net: RDMA: don't expose hw_stats into non-init net namespaces

[Roman Gushchin]

Commit 467f432a521a ("RDMA/core: Split port and device counter sysfs attributes")
accidentally exposed hw_counters to non-init net namespaces.

Fix this by hiding the IB_ATTR_GROUP_HW_STATS group when initializing
a non-init rdma device.

Fixes: 467f432a521a ("RDMA/core: Split port and device counter sysfs attributes")
Signed-off-by: Roman Gushchin <roman.gushchin@xxxxxxxxx>
Cc: Jason Gunthorpe <jgg@xxxxxxxx>
Cc: Leon Romanovsky <leon@xxxxxxxxxx>
Cc: Maher Sanalla <msanalla@xxxxxxxxxx>
Cc: Parav Pandit <parav@xxxxxxxxxxxx>
Cc: linux-rdma@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
---
 drivers/infiniband/core/device.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index 8dea307addf1..bf4a016ccb9d 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -528,6 +528,8 @@ static struct class ib_class = {
 static void rdma_init_coredev(struct ib_core_device *coredev,
 			      struct ib_device *dev, struct net *net)
 {
+	bool is_full_dev = net_eq(net, &init_net);
+
 	/* This BUILD_BUG_ON is intended to catch layout change
 	 * of union of ib_core_device and device.
 	 * dev must be the first element as ib_core and providers
@@ -539,6 +541,10 @@ static void rdma_init_coredev(struct ib_core_device *coredev,
 
 	coredev->dev.class = &ib_class;
 	coredev->dev.groups = dev->groups;
+
+	if (!is_full_dev)
+		coredev->dev.groups[IB_ATTR_GROUP_HW_STATS] = NULL;
+
 	device_initialize(&coredev->dev);
 	coredev->owner = dev;
 	INIT_LIST_HEAD(&coredev->port_list);
-- 
2.48.1.658.g4767266eb4-goog