qeth: support z/VM VSWITCH Port Isolation

z/VM Virtual Switch Port Isolation allows guests on a VLAN UNAWARE
virtual switch to be isolated from other guests on the VSWITCH.
(See z/VM Apars VM64281 and VM64463).
The Linux qeth driver is affected, because it has to handle new
error codes introduced with the z/VM VSWITCH Port Isolation support.

Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 29 insertions, 1 deletions

diff --git a/drivers/s390/net/qeth_core_mpc.c b/drivers/s390/net/qeth_core_mpc.c
index 06f4de1f0507..ec24901c802c 100644
--- a/drivers/s390/net/qeth_core_mpc.c
+++ b/drivers/s390/net/qeth_core_mpc.c
@@ -181,6 +181,8 @@ static struct ipa_rc_msg qeth_ipa_rc_msg[] = {
         {IPA_RC_L2_ADDR_TABLE_FULL,     "Layer2 address table full"},
         {IPA_RC_L2_DUP_LAYER3_MAC,      "Duplicate with layer 3 MAC"},
         {IPA_RC_L2_GMAC_NOT_FOUND,      "GMAC not found"},
+        {IPA_RC_L2_MAC_NOT_AUTH_BY_HYP, "L2 mac not authorized by hypervisor"},
+        {IPA_RC_L2_MAC_NOT_AUTH_BY_ADP, "L2 mac not authorized by adapter"},
         {IPA_RC_L2_MAC_NOT_FOUND,       "L2 mac address not found"},
         {IPA_RC_L2_INVALID_VLAN_ID,     "L2 invalid vlan id"},
         {IPA_RC_L2_DUP_VLAN_ID,         "L2 duplicate vlan id"},
diff --git a/drivers/s390/net/qeth_core_mpc.h b/drivers/s390/net/qeth_core_mpc.h
index 18548822e37c..eecb2ee62e85 100644
--- a/drivers/s390/net/qeth_core_mpc.h
+++ b/drivers/s390/net/qeth_core_mpc.h
@@ -168,6 +168,8 @@ enum qeth_ipa_return_codes {
         IPA_RC_L2_ADDR_TABLE_FULL       = 0x2006,
         IPA_RC_L2_DUP_LAYER3_MAC        = 0x200a,
         IPA_RC_L2_GMAC_NOT_FOUND        = 0x200b,
+        IPA_RC_L2_MAC_NOT_AUTH_BY_HYP   = 0x200c,
+        IPA_RC_L2_MAC_NOT_AUTH_BY_ADP   = 0x200d,
         IPA_RC_L2_MAC_NOT_FOUND         = 0x2010,
         IPA_RC_L2_INVALID_VLAN_ID       = 0x2015,
         IPA_RC_L2_DUP_VLAN_ID           = 0x2016,
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index 44c15685ab86..9ca6bab7c9ba 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -130,7 +130,7 @@ static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
         cmd = (struct qeth_ipa_cmd *) data;
         mac = &cmd->data.setdelmac.mac[0];
         /* MAC already registered, needed in couple/uncouple case */
-        if (cmd->hdr.return_code == 0x2005) {
+        if (cmd->hdr.return_code ==  IPA_RC_L2_DUP_MAC) {
                 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s \n",
                           mac, QETH_CARD_IFNAME(card));
                 cmd->hdr.return_code = 0;
@@ -502,6 +502,30 @@ static int qeth_l2_send_setmac_cb(struct qeth_card *card,
         if (cmd->hdr.return_code) {
                 QETH_DBF_TEXT_(TRACE, 2, "L2er%x", cmd->hdr.return_code);
                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
+                switch (cmd->hdr.return_code) {
+                case IPA_RC_L2_DUP_MAC:
+                case IPA_RC_L2_DUP_LAYER3_MAC:
+                        dev_warn(&card->gdev->dev,
+                                "MAC address "
+                                "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
+                                "already exists\n",
+                                card->dev->dev_addr[0], card->dev->dev_addr[1],
+                                card->dev->dev_addr[2], card->dev->dev_addr[3],
+                                card->dev->dev_addr[4], card->dev->dev_addr[5]);
+                        break;
+                case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
+                case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
+                        dev_warn(&card->gdev->dev,
+                                "MAC address "
+                                "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
+                                "is not authorized\n",
+                                card->dev->dev_addr[0], card->dev->dev_addr[1],
+                                card->dev->dev_addr[2], card->dev->dev_addr[3],
+                                card->dev->dev_addr[4], card->dev->dev_addr[5]);
+                        break;
+                default:
+                        break;
+                }
                 cmd->hdr.return_code = -EIO;
         } else {
                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;