6.1-stable review patch. If anyone has any objections, please let me know.
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From: Lukasz Czapnik lukasz.czapnik@intel.com
commit b99dd77076bd3fddac6f7f1cbfa081c38fde17f5 upstream.
When adding new VM MAC, driver checks only *active* filters in vsi->mac_filter_hash. Each MAC, even in non-active state is using resources.
To determine number of MACs VM uses, count VSI filters in *any* state.
Add i40e_count_all_filters() to simply count all filters, and rename i40e_count_filters() to i40e_count_active_filters() to avoid ambiguity.
Fixes: cfb1d572c986 ("i40e: Add ensurance of MacVlan resources for every trusted VF") Cc: stable@vger.kernel.org Signed-off-by: Lukasz Czapnik lukasz.czapnik@intel.com Reviewed-by: Aleksandr Loktionov aleksandr.loktionov@intel.com Signed-off-by: Przemek Kitszel przemyslaw.kitszel@intel.com Reviewed-by: Simon Horman horms@kernel.org Tested-by: Rafal Romanowski rafal.romanowski@intel.com Signed-off-by: Tony Nguyen anthony.l.nguyen@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/intel/i40e/i40e.h | 3 drivers/net/ethernet/intel/i40e/i40e_main.c | 26 +++++++- drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 65 ++++++++------------- 3 files changed, 50 insertions(+), 44 deletions(-)
--- a/drivers/net/ethernet/intel/i40e/i40e.h +++ b/drivers/net/ethernet/intel/i40e/i40e.h @@ -1255,7 +1255,8 @@ struct i40e_mac_filter *i40e_add_mac_fil const u8 *macaddr); int i40e_del_mac_filter(struct i40e_vsi *vsi, const u8 *macaddr); bool i40e_is_vsi_in_vlan(struct i40e_vsi *vsi); -int i40e_count_filters(struct i40e_vsi *vsi); +int i40e_count_all_filters(struct i40e_vsi *vsi); +int i40e_count_active_filters(struct i40e_vsi *vsi); struct i40e_mac_filter *i40e_find_mac(struct i40e_vsi *vsi, const u8 *macaddr); void i40e_vlan_stripping_enable(struct i40e_vsi *vsi); static inline bool i40e_is_sw_dcb(struct i40e_pf *pf) --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -1233,12 +1233,30 @@ void i40e_update_stats(struct i40e_vsi * }
/** - * i40e_count_filters - counts VSI mac filters + * i40e_count_all_filters - counts VSI MAC filters * @vsi: the VSI to be searched * - * Returns count of mac filters - **/ -int i40e_count_filters(struct i40e_vsi *vsi) + * Return: count of MAC filters in any state. + */ +int i40e_count_all_filters(struct i40e_vsi *vsi) +{ + struct i40e_mac_filter *f; + struct hlist_node *h; + int bkt, cnt = 0; + + hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) + cnt++; + + return cnt; +} + +/** + * i40e_count_active_filters - counts VSI MAC filters + * @vsi: the VSI to be searched + * + * Return: count of active MAC filters. + */ +int i40e_count_active_filters(struct i40e_vsi *vsi) { struct i40e_mac_filter *f; struct hlist_node *h; --- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c +++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c @@ -2848,24 +2848,6 @@ error_param: (u8 *)&stats, sizeof(stats)); }
-/** - * i40e_can_vf_change_mac - * @vf: pointer to the VF info - * - * Return true if the VF is allowed to change its MAC filters, false otherwise - */ -static bool i40e_can_vf_change_mac(struct i40e_vf *vf) -{ - /* If the VF MAC address has been set administratively (via the - * ndo_set_vf_mac command), then deny permission to the VF to - * add/delete unicast MAC addresses, unless the VF is trusted - */ - if (vf->pf_set_mac && !vf->trusted) - return false; - - return true; -} - #define I40E_MAX_MACVLAN_PER_HW 3072 #define I40E_MAX_MACVLAN_PER_PF(num_ports) (I40E_MAX_MACVLAN_PER_HW / \ (num_ports)) @@ -2904,8 +2886,10 @@ static inline int i40e_check_vf_permissi struct i40e_pf *pf = vf->pf; struct i40e_vsi *vsi = pf->vsi[vf->lan_vsi_idx]; struct i40e_hw *hw = &pf->hw; - int mac2add_cnt = 0; - int i; + int i, mac_add_max, mac_add_cnt = 0; + bool vf_trusted; + + vf_trusted = test_bit(I40E_VIRTCHNL_VF_CAP_PRIVILEGE, &vf->vf_caps);
for (i = 0; i < al->num_elements; i++) { struct i40e_mac_filter *f; @@ -2925,9 +2909,8 @@ static inline int i40e_check_vf_permissi * The VF may request to set the MAC address filter already * assigned to it so do not return an error in that case. */ - if (!i40e_can_vf_change_mac(vf) && - !is_multicast_ether_addr(addr) && - !ether_addr_equal(addr, vf->default_lan_addr.addr)) { + if (!vf_trusted && !is_multicast_ether_addr(addr) && + vf->pf_set_mac && !ether_addr_equal(addr, vf->default_lan_addr.addr)) { dev_err(&pf->pdev->dev, "VF attempting to override administratively set MAC address, bring down and up the VF interface to resume normal operation\n"); return -EPERM; @@ -2936,29 +2919,33 @@ static inline int i40e_check_vf_permissi /*count filters that really will be added*/ f = i40e_find_mac(vsi, addr); if (!f) - ++mac2add_cnt; + ++mac_add_cnt; }
/* If this VF is not privileged, then we can't add more than a limited - * number of addresses. Check to make sure that the additions do not - * push us over the limit. - */ - if (!test_bit(I40E_VIRTCHNL_VF_CAP_PRIVILEGE, &vf->vf_caps)) { - if ((i40e_count_filters(vsi) + mac2add_cnt) > - I40E_VC_MAX_MAC_ADDR_PER_VF) { - dev_err(&pf->pdev->dev, - "Cannot add more MAC addresses, VF is not trusted, switch the VF to trusted to add more functionality\n"); - return -EPERM; - } - /* If this VF is trusted, it can use more resources than untrusted. + * number of addresses. + * + * If this VF is trusted, it can use more resources than untrusted. * However to ensure that every trusted VF has appropriate number of * resources, divide whole pool of resources per port and then across * all VFs. */ - } else { - if ((i40e_count_filters(vsi) + mac2add_cnt) > - I40E_VC_MAX_MACVLAN_PER_TRUSTED_VF(pf->num_alloc_vfs, - hw->num_ports)) { + if (!vf_trusted) + mac_add_max = I40E_VC_MAX_MAC_ADDR_PER_VF; + else + mac_add_max = I40E_VC_MAX_MACVLAN_PER_TRUSTED_VF(pf->num_alloc_vfs, hw->num_ports); + + /* VF can replace all its filters in one step, in this case mac_add_max + * will be added as active and another mac_add_max will be in + * a to-be-removed state. Account for that. + */ + if ((i40e_count_active_filters(vsi) + mac_add_cnt) > mac_add_max || + (i40e_count_all_filters(vsi) + mac_add_cnt) > 2 * mac_add_max) { + if (!vf_trusted) { + dev_err(&pf->pdev->dev, + "Cannot add more MAC addresses, VF is not trusted, switch the VF to trusted to add more functionality\n"); + return -EPERM; + } else { dev_err(&pf->pdev->dev, "Cannot add more MAC addresses, trusted VF exhausted it's resources\n"); return -EPERM;