From edc0b0bccc9c80d9a44d3002dcca94984b25e7cf Mon Sep 17 00:00:00 2001
From: Mark Bloch <mbloch@nvidia.com>
Date: Mon, 7 Jun 2021 11:03:12 +0300
Subject: [PATCH 1/1] RDMA/mlx5: Block FDB rules when not in switchdev mode
Git-commit: edc0b0bccc9c80d9a44d3002dcca94984b25e7cf
Patch-mainline: v5.13
References: git-fixes
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@nvidia.com
Reviewed-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Nicolas Morey-Chaisemartin <nmoreychaisemartin@suse.com>
---
drivers/infiniband/hw/mlx5/fs.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/infiniband/hw/mlx5/fs.c b/drivers/infiniband/hw/mlx5/fs.c
index 2fc6a60c4e77..f84441ff0c81 100644
--- 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_FLOW_MATCHER_CREATE)(
if (err)
goto end;
+ if (obj->ns_type == MLX5_FLOW_NAMESPACE_FDB &&
+ mlx5_eswitch_mode(dev->mdev->priv.eswitch) != MLX5_ESWITCH_OFFLOADS) {
+ err = -EINVAL;
+ goto end;
+ }
+
uobj->object = obj;
obj->mdev = dev->mdev;
atomic_set(&obj->usecnt, 0);
--
2.38.0.1.gee35aeee4b76