ixgbe: Warn on VF attempt to override Administratively set MAC/VLAN

Print warnings to the system log when the VF attempts to override
MAC/VLAN settings that were configured by the VMM Host administrator
using the ip link set commands.

Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ixgbe/ixgbe_sriov.c b/drivers/net/ixgbe/ixgbe_sriov.c
index 6e3e94b..e01d0db 100644 (file)
--- a/drivers/net/ixgbe/ixgbe_sriov.c
+++ b/drivers/net/ixgbe/ixgbe_sriov.c
@@ -227,6 +227,7 @@ static int ixgbe_rcv_msg_from_vf(struct ixgbe_adapter *adapter, u32 vf)
        int entries;
        u16 *hash_list;
        int add, vid;
+       u8 *new_mac;
 
        retval = ixgbe_read_mbx(hw, msgbuf, mbx_size, vf);
 
@@ -244,15 +245,22 @@ static int ixgbe_rcv_msg_from_vf(struct ixgbe_adapter *adapter, u32 vf)
 
        if (msgbuf[0] == IXGBE_VF_RESET) {
                unsigned char *vf_mac = adapter->vfinfo[vf].vf_mac_addresses;
-               u8 *addr = (u8 *)(&msgbuf[1]);
+               new_mac = (u8 *)(&msgbuf[1]);
                e_info(probe, "VF Reset msg received from vf %d\n", vf);
                adapter->vfinfo[vf].clear_to_send = false;
                ixgbe_vf_reset_msg(adapter, vf);
                adapter->vfinfo[vf].clear_to_send = true;
 
+               if (is_valid_ether_addr(new_mac) &&
+                   !adapter->vfinfo[vf].pf_set_mac)
+                       ixgbe_set_vf_mac(adapter, vf, vf_mac);
+               else
+                       ixgbe_set_vf_mac(adapter,
+                                vf, adapter->vfinfo[vf].vf_mac_addresses);
+
                /* reply to reset with ack and vf mac address */
                msgbuf[0] = IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_ACK;
-               memcpy(addr, vf_mac, IXGBE_ETH_LENGTH_OF_ADDRESS);
+               memcpy(new_mac, vf_mac, IXGBE_ETH_LENGTH_OF_ADDRESS);
                /*
                 * Piggyback the multicast filter type so VF can compute the
                 * correct vectors
@@ -271,14 +279,16 @@ static int ixgbe_rcv_msg_from_vf(struct ixgbe_adapter *adapter, u32 vf)
 
        switch ((msgbuf[0] & 0xFFFF)) {
        case IXGBE_VF_SET_MAC_ADDR:
-               {
-                       u8 *new_mac = ((u8 *)(&msgbuf[1]));
-                       if (is_valid_ether_addr(new_mac) &&
-                           !adapter->vfinfo[vf].pf_set_mac)
-                               ixgbe_set_vf_mac(adapter, vf, new_mac);
-                       else
-                               ixgbe_set_vf_mac(adapter,
-                                 vf, adapter->vfinfo[vf].vf_mac_addresses);
+               new_mac = ((u8 *)(&msgbuf[1]));
+               if (is_valid_ether_addr(new_mac) &&
+                   !adapter->vfinfo[vf].pf_set_mac) {
+                       ixgbe_set_vf_mac(adapter, vf, new_mac);
+               } else if (memcmp(adapter->vfinfo[vf].vf_mac_addresses,
+                                 new_mac, ETH_ALEN)) {
+                       e_warn(drv, "VF %d attempted to override "
+                              "administratively set MAC address\nReload "
+                              "the VF driver to resume operations\n", vf);
+                       retval = -1;
                }
                break;
        case IXGBE_VF_SET_MULTICAST:
@@ -295,7 +305,15 @@ static int ixgbe_rcv_msg_from_vf(struct ixgbe_adapter *adapter, u32 vf)
                add = (msgbuf[0] & IXGBE_VT_MSGINFO_MASK)
                      >> IXGBE_VT_MSGINFO_SHIFT;
                vid = (msgbuf[1] & IXGBE_VLVF_VLANID_MASK);
-               retval = ixgbe_set_vf_vlan(adapter, add, vid, vf);
+               if (adapter->vfinfo[vf].pf_vlan) {
+                       e_warn(drv, "VF %d attempted to override "
+                              "administratively set VLAN configuration\n"
+                              "Reload the VF driver to resume operations\n",
+                              vf);
+                       retval = -1;
+               } else {
+                       retval = ixgbe_set_vf_vlan(adapter, add, vid, vf);
+               }
                break;
        default:
                e_err(drv, "Unhandled Msg %8.8x\n", msgbuf[0]);