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IB/mlx4: Forbid using sysfs to change RoCE pkeys 

commit 2b135db3e81301d0452e6aa107349abe67b097d6 upstream.

The pkey mapping for RoCE must remain the default mapping:
VFs:
  virtual index 0 = mapped to real index 0 (0xFFFF)
  All others indices: mapped to a real pkey index containing an
                      invalid pkey.
PF:
  virtual index i = real index i.

Don't allow users to change these mappings using files found in
sysfs.

Fixes: c1e7e46612 ('IB/mlx4: Add iov directory in sysfs under the ib device')
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jack Morgenstein 2015-07-30 17:34:23 +03:00 committed by Greg Kroah-Hartman
parent caf233503f
commit a6d452e0f3
1 changed files with 4 additions and 1 deletions
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5
drivers/infiniband/hw/mlx4/sysfs.c
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@ -563,6 +563,8 @@ static int add_port(struct mlx4_ib_dev *dev, int port_num, int slave)
struct mlx4_port *p;
int i;
int ret;
int is_eth = rdma_port_get_link_layer(&dev->ib_dev, port_num) ==
IB_LINK_LAYER_ETHERNET;
p = kzalloc(sizeof *p, GFP_KERNEL);
if (!p)
@ -580,7 +582,8 @@ static int add_port(struct mlx4_ib_dev *dev, int port_num, int slave)
p->pkey_group.name = "pkey_idx";
p->pkey_group.attrs =
alloc_group_attrs(show_port_pkey, store_port_pkey,
alloc_group_attrs(show_port_pkey,
is_eth ? NULL : store_port_pkey,
dev->dev->caps.pkey_table_len[port_num]);
if (!p->pkey_group.attrs)
goto err_alloc;