From: Mark Bloch <mbloch@xxxxxxxxxx>
commit edc0b0bccc9c80d9a44d3002dcca94984b25e7cf upstream.
Allow creating FDB steering rules only when in switchdev mode.
The only software model where a userspace application can manipulate
FDB entries is when it manages the eswitch. This is only possible in
switchdev mode where we expose a single RDMA device with representors
for all the vports that are connected to the eswitch.
Fixes: 52438be44112 ("RDMA/mlx5: Allow inserting a steering rule to the FDB")
Link: https://lore.kernel.org/r/e928ae7c58d07f104716a2a8d730963d1bd01204.1623052923.git.leonro@xxxxxxxxxx
Reviewed-by: Maor Gottlieb <maorg@xxxxxxxxxx>
Signed-off-by: Mark Bloch <mbloch@xxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/infiniband/hw/mlx5/fs.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/drivers/infiniband/hw/mlx5/fs.c
+++ b/drivers/infiniband/hw/mlx5/fs.c
@@ -2134,6 +2134,12 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD
if (err)
goto end;
+ if (obj->ns_type == MLX5_FLOW_NAMESPACE_FDB &&
+ mlx5_eswitch_mode(dev->mdev) != MLX5_ESWITCH_OFFLOADS) {
+ err = -EINVAL;
+ goto end;
+ }
+
uobj->object = obj;
obj->mdev = dev->mdev;
atomic_set(&obj->usecnt, 0);
