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RDMA/mlx5: Block FDB rules when not in switchdev mode 

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: 52438be441 ("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>
[sudip: manually backport to old file]
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mark Bloch 2021-06-07 11:03:12 +03:00 committed by Sasha Levin
parent c5fb49e12f
commit 5e8519c408
1 changed files with 8 additions and 0 deletions
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8
drivers/infiniband/hw/mlx5/flow.c
View File

@ -13,6 +13,7 @@
#include <rdma/ib_umem.h>
#include <linux/mlx5/driver.h>
#include <linux/mlx5/fs.h>
#include <linux/mlx5/eswitch.h>
#include "mlx5_ib.h"
#define UVERBS_MODULE_NAME mlx5_ib
@ -316,6 +317,13 @@ 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);