If a VF tries to add unsupported cloud filter through virchnl
then i40e_add_del_cloud_filter(_big_buf) returns -ENOTSUPP but
this error code is stored in 'ret' instead of 'aq_ret' that
is used as error code sent back to VF. In this scenario where
one of the mentioned functions fails the value of 'aq_ret'
is zero so the VF will incorrectly receive a 'success'.
Use 'aq_ret' to store return value and remove 'ret' local
variable. Additionally fix the issue when filter allocation
fails, in this case no notification is sent back to the VF.
Signed-off-by: Ivan Vecera <[email protected]>
---
.../net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)
diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index 08d7edccfb8ddb..3f99eb19824527 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -3844,7 +3844,7 @@ static int i40e_vc_add_cloud_filter(struct i40e_vf *vf, u8 *msg)
struct i40e_pf *pf = vf->pf;
struct i40e_vsi *vsi = NULL;
int aq_ret = 0;
- int i, ret;
+ int i;
if (!i40e_sync_vf_state(vf, I40E_VF_STATE_ACTIVE)) {
aq_ret = -EINVAL;
@@ -3868,8 +3868,10 @@ static int i40e_vc_add_cloud_filter(struct i40e_vf *vf, u8 *msg)
}
cfilter = kzalloc(sizeof(*cfilter), GFP_KERNEL);
- if (!cfilter)
- return -ENOMEM;
+ if (!cfilter) {
+ aq_ret = -ENOMEM;
+ goto err_out;
+ }
/* parse destination mac address */
for (i = 0; i < ETH_ALEN; i++)
@@ -3917,13 +3919,13 @@ static int i40e_vc_add_cloud_filter(struct i40e_vf *vf, u8 *msg)
/* Adding cloud filter programmed as TC filter */
if (tcf.dst_port)
- ret = i40e_add_del_cloud_filter_big_buf(vsi, cfilter, true);
+ aq_ret = i40e_add_del_cloud_filter_big_buf(vsi, cfilter, true);
else
- ret = i40e_add_del_cloud_filter(vsi, cfilter, true);
- if (ret) {
+ aq_ret = i40e_add_del_cloud_filter(vsi, cfilter, true);
+ if (aq_ret) {
dev_err(&pf->pdev->dev,
"VF %d: Failed to add cloud filter, err %pe aq_err %s\n",
- vf->vf_id, ERR_PTR(ret),
+ vf->vf_id, ERR_PTR(aq_ret),
i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
goto err_free;
}
--
2.41.0
+ Avinash Dayanand
On Fri, Nov 03, 2023 at 09:42:16PM +0100, Ivan Vecera wrote:
> If a VF tries to add unsupported cloud filter through virchnl
> then i40e_add_del_cloud_filter(_big_buf) returns -ENOTSUPP but
> this error code is stored in 'ret' instead of 'aq_ret' that
> is used as error code sent back to VF. In this scenario where
> one of the mentioned functions fails the value of 'aq_ret'
> is zero so the VF will incorrectly receive a 'success'.
>
> Use 'aq_ret' to store return value and remove 'ret' local
> variable. Additionally fix the issue when filter allocation
> fails, in this case no notification is sent back to the VF.
>
> Signed-off-by: Ivan Vecera <[email protected]>
Hi Ivan,
as a fix targeted at 'net' this probably warrants a fixes tag.
Perhaps the following is appropriate?
Fixes: e284fc280473 ("i40e: Add and delete cloud filter")
The above not withstanding, this change looks good to me.
Reviewed-by: Simon Horman <[email protected]>
> ---
> .../net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 16 +++++++++-------
> 1 file changed, 9 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
> index 08d7edccfb8ddb..3f99eb19824527 100644
> --- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
> +++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
> @@ -3844,7 +3844,7 @@ static int i40e_vc_add_cloud_filter(struct i40e_vf *vf, u8 *msg)
> struct i40e_pf *pf = vf->pf;
> struct i40e_vsi *vsi = NULL;
> int aq_ret = 0;
> - int i, ret;
> + int i;
>
> if (!i40e_sync_vf_state(vf, I40E_VF_STATE_ACTIVE)) {
> aq_ret = -EINVAL;
> @@ -3868,8 +3868,10 @@ static int i40e_vc_add_cloud_filter(struct i40e_vf *vf, u8 *msg)
> }
>
> cfilter = kzalloc(sizeof(*cfilter), GFP_KERNEL);
> - if (!cfilter)
> - return -ENOMEM;
> + if (!cfilter) {
> + aq_ret = -ENOMEM;
> + goto err_out;
> + }
>
> /* parse destination mac address */
> for (i = 0; i < ETH_ALEN; i++)
> @@ -3917,13 +3919,13 @@ static int i40e_vc_add_cloud_filter(struct i40e_vf *vf, u8 *msg)
>
> /* Adding cloud filter programmed as TC filter */
> if (tcf.dst_port)
> - ret = i40e_add_del_cloud_filter_big_buf(vsi, cfilter, true);
> + aq_ret = i40e_add_del_cloud_filter_big_buf(vsi, cfilter, true);
> else
> - ret = i40e_add_del_cloud_filter(vsi, cfilter, true);
> - if (ret) {
> + aq_ret = i40e_add_del_cloud_filter(vsi, cfilter, true);
> + if (aq_ret) {
> dev_err(&pf->pdev->dev,
> "VF %d: Failed to add cloud filter, err %pe aq_err %s\n",
> - vf->vf_id, ERR_PTR(ret),
> + vf->vf_id, ERR_PTR(aq_ret),
> i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
> goto err_free;
> }
> --
> 2.41.0
>
>