qeth: support ipv6 query arp cache for HiperSockets

Function qeth_l3_arp_query now queries for IPv6 addresses, too, if
QETH_QARP_WITH_IPV6 is passed as parameter to the ioctl. HiperSockets
and GuestLAN in HiperSockets mode provide corresponding entries.

Signed-off-by: Einar Lueck <elelueck@de.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 41 insertions, 10 deletions

diff --git a/arch/s390/include/asm/qeth.h b/arch/s390/include/asm/qeth.h
index 06cbd1e8c943..90efda0b137d 100644
--- a/arch/s390/include/asm/qeth.h
+++ b/arch/s390/include/asm/qeth.h
@@ -28,39 +28,70 @@ struct qeth_arp_cache_entry {
         __u8  reserved2[32];
 } __attribute__ ((packed));
 
+enum qeth_arp_ipaddrtype {
+        QETHARP_IP_ADDR_V4 = 1,
+        QETHARP_IP_ADDR_V6 = 2,
+};
+struct qeth_arp_entrytype {
+        __u8 mac;
+        __u8 ip;
+} __attribute__((packed));
+
+#define QETH_QARP_MEDIASPECIFIC_BYTES 32
+#define QETH_QARP_MACADDRTYPE_BYTES 1
 struct qeth_arp_qi_entry7 {
-        __u8 media_specific[32];
-        __u8 macaddr_type;
-        __u8 ipaddr_type;
+        __u8 media_specific[QETH_QARP_MEDIASPECIFIC_BYTES];
+        struct qeth_arp_entrytype type;
         __u8 macaddr[6];
         __u8 ipaddr[4];
 } __attribute__((packed));
 
+struct qeth_arp_qi_entry7_ipv6 {
+        __u8 media_specific[QETH_QARP_MEDIASPECIFIC_BYTES];
+        struct qeth_arp_entrytype type;
+        __u8 macaddr[6];
+        __u8 ipaddr[16];
+} __attribute__((packed));
+
 struct qeth_arp_qi_entry7_short {
-        __u8 macaddr_type;
-        __u8 ipaddr_type;
+        struct qeth_arp_entrytype type;
         __u8 macaddr[6];
         __u8 ipaddr[4];
 } __attribute__((packed));
 
+struct qeth_arp_qi_entry7_short_ipv6 {
+        struct qeth_arp_entrytype type;
+        __u8 macaddr[6];
+        __u8 ipaddr[16];
+} __attribute__((packed));
+
 struct qeth_arp_qi_entry5 {
-        __u8 media_specific[32];
-        __u8 macaddr_type;
-        __u8 ipaddr_type;
+        __u8 media_specific[QETH_QARP_MEDIASPECIFIC_BYTES];
+        struct qeth_arp_entrytype type;
         __u8 ipaddr[4];
 } __attribute__((packed));
 
+struct qeth_arp_qi_entry5_ipv6 {
+        __u8 media_specific[QETH_QARP_MEDIASPECIFIC_BYTES];
+        struct qeth_arp_entrytype type;
+        __u8 ipaddr[16];
+} __attribute__((packed));
+
 struct qeth_arp_qi_entry5_short {
-        __u8 macaddr_type;
-        __u8 ipaddr_type;
+        struct qeth_arp_entrytype type;
         __u8 ipaddr[4];
 } __attribute__((packed));
 
+struct qeth_arp_qi_entry5_short_ipv6 {
+        struct qeth_arp_entrytype type;
+        __u8 ipaddr[16];
+} __attribute__((packed));
 /*
  * can be set by user if no "media specific information" is wanted
  * -> saves a lot of space in user space buffer
  */
 #define QETH_QARP_STRIP_ENTRIES  0x8000
+#define QETH_QARP_WITH_IPV6      0x4000
 #define QETH_QARP_REQUEST_MASK   0x00ff
 
 /* data sent to user space as result of query arp ioctl */