when execute tcpdump , the interface will turn on promisc first. if it's an
i40e interface, the interface will be reset, so packets lost.
my driver version is 1.5.16, in file "i40e_main.c" line 2144, could I delete
the code marked, to avoid packets lost , as I never use any virtualization
capabilitie ?
if ((changed_flags & IFF_PROMISC) || promisc_forced_on) {
bool cur_promisc;
cur_promisc = (!!(vsi->current_netdev_flags & IFF_PROMISC) ||
test_bit(__I40E_FILTER_OVERFLOW_PROMISC,
&vsi->state));
if ((vsi->type == I40E_VSI_MAIN) &&
(pf->lan_veb != I40E_NO_VEB) &&
!(pf->flags & I40E_FLAG_MFP_ENABLED)) {
/* set defport ON for Main VSI instead of true promisc
* this way we will get all unicast/multicast and vlan
* promisc behavior but will not get VF or VMDq traffic
* replicated on the Main VSI.
*/
if (pf->cur_promisc != cur_promisc) {
pf->cur_promisc = cur_promisc;
set_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
}
} else {
aq_ret = i40e_aq_set_vsi_unicast_promiscuous(
&vsi->back->hw,
vsi->seid,
cur_promisc, NULL,
true);
if (aq_ret) {
retval = i40e_aq_rc_to_posix(aq_ret,
pf->hw.aq.asq_last_status);
dev_info(&pf->pdev->dev,
"set unicast promisc failed, err %s,
aq_err %s\n",
i40e_stat_str(&pf->hw, aq_ret),
i40e_aq_str(&pf->hw,
pf->hw.aq.asq_last_status));
}
aq_ret = i40e_aq_set_vsi_multicast_promiscuous(
&vsi->back->hw,
vsi->seid,
cur_promisc,
NULL);
if (aq_ret) {
retval = i40e_aq_rc_to_posix(aq_ret,
pf->hw.aq.asq_last_status);
dev_info(&pf->pdev->dev,
"set multicast promisc failed, err %s,
aq_err %s\n",
i40e_stat_str(&pf->hw, aq_ret),
i40e_aq_str(&pf->hw,
pf->hw.aq.asq_last_status));
}
}
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