Drivers: hv: kvp: Support the new IP injection messages
K. Y. Srinivasan [Fri, 17 Aug 2012 01:32:12 +0000 (18:32 -0700)]
Implement support for the new IP injection messages in the driver code.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/hv/hv_kvp.c

index eb4d073..d906050 100644 (file)
@@ -63,7 +63,7 @@ static int dm_reg_value;
 static void kvp_send_key(struct work_struct *dummy);
 
 
-static void kvp_respond_to_host(char *key, char *value, int error);
+static void kvp_respond_to_host(struct hv_kvp_msg *msg, int error);
 static void kvp_work_func(struct work_struct *dummy);
 static void kvp_register(int);
 
@@ -108,7 +108,7 @@ kvp_work_func(struct work_struct *dummy)
         * If the timer fires, the user-mode component has not responded;
         * process the pending transaction.
         */
-       kvp_respond_to_host("Unknown key", "Guest timed out", HV_E_FAIL);
+       kvp_respond_to_host(NULL, HV_E_FAIL);
 }
 
 static int kvp_handle_handshake(struct hv_kvp_msg *msg)
@@ -199,9 +199,118 @@ kvp_cn_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp)
         * to the host. But first, cancel the timeout.
         */
        if (cancel_delayed_work_sync(&kvp_work))
-               kvp_respond_to_host(data->data.key, data->data.value, error);
+               kvp_respond_to_host(message, error);
 }
 
+
+static int process_ob_ipinfo(void *in_msg, void *out_msg, int op)
+{
+       struct hv_kvp_msg *in = in_msg;
+       struct hv_kvp_ip_msg *out = out_msg;
+       int len;
+
+       switch (op) {
+       case KVP_OP_GET_IP_INFO:
+               /*
+                * Transform all parameters into utf16 encoding.
+                */
+               len = utf8s_to_utf16s((char *)in->body.kvp_ip_val.ip_addr,
+                               strlen((char *)in->body.kvp_ip_val.ip_addr),
+                               UTF16_HOST_ENDIAN,
+                               (wchar_t *)out->kvp_ip_val.ip_addr,
+                               MAX_IP_ADDR_SIZE);
+               if (len < 0)
+                       return len;
+
+               len = utf8s_to_utf16s((char *)in->body.kvp_ip_val.sub_net,
+                               strlen((char *)in->body.kvp_ip_val.sub_net),
+                               UTF16_HOST_ENDIAN,
+                               (wchar_t *)out->kvp_ip_val.sub_net,
+                               MAX_IP_ADDR_SIZE);
+               if (len < 0)
+                       return len;
+
+               len = utf8s_to_utf16s((char *)in->body.kvp_ip_val.gate_way,
+                               strlen((char *)in->body.kvp_ip_val.gate_way),
+                               UTF16_HOST_ENDIAN,
+                               (wchar_t *)out->kvp_ip_val.gate_way,
+                               MAX_GATEWAY_SIZE);
+               if (len < 0)
+                       return len;
+
+               len = utf8s_to_utf16s((char *)in->body.kvp_ip_val.dns_addr,
+                               strlen((char *)in->body.kvp_ip_val.dns_addr),
+                               UTF16_HOST_ENDIAN,
+                               (wchar_t *)out->kvp_ip_val.dns_addr,
+                               MAX_IP_ADDR_SIZE);
+               if (len < 0)
+                       return len;
+
+               len = utf8s_to_utf16s((char *)in->body.kvp_ip_val.adapter_id,
+                               strlen((char *)in->body.kvp_ip_val.adapter_id),
+                               UTF16_HOST_ENDIAN,
+                               (wchar_t *)out->kvp_ip_val.adapter_id,
+                               MAX_IP_ADDR_SIZE);
+               if (len < 0)
+                       return len;
+
+               out->kvp_ip_val.dhcp_enabled =
+                       in->body.kvp_ip_val.dhcp_enabled;
+       }
+
+       return 0;
+}
+
+static void process_ib_ipinfo(void *in_msg, void *out_msg, int op)
+{
+       struct hv_kvp_ip_msg *in = in_msg;
+       struct hv_kvp_msg *out = out_msg;
+
+       switch (op) {
+       case KVP_OP_SET_IP_INFO:
+               /*
+                * Transform all parameters into utf8 encoding.
+                */
+               utf16s_to_utf8s((wchar_t *)in->kvp_ip_val.ip_addr,
+                               MAX_IP_ADDR_SIZE,
+                               UTF16_LITTLE_ENDIAN,
+                               (__u8 *)out->body.kvp_ip_val.ip_addr,
+                               MAX_IP_ADDR_SIZE);
+
+               utf16s_to_utf8s((wchar_t *)in->kvp_ip_val.sub_net,
+                               MAX_IP_ADDR_SIZE,
+                               UTF16_LITTLE_ENDIAN,
+                               (__u8 *)out->body.kvp_ip_val.sub_net,
+                               MAX_IP_ADDR_SIZE);
+
+               utf16s_to_utf8s((wchar_t *)in->kvp_ip_val.gate_way,
+                               MAX_GATEWAY_SIZE,
+                               UTF16_LITTLE_ENDIAN,
+                               (__u8 *)out->body.kvp_ip_val.gate_way,
+                               MAX_GATEWAY_SIZE);
+
+               utf16s_to_utf8s((wchar_t *)in->kvp_ip_val.dns_addr,
+                               MAX_IP_ADDR_SIZE,
+                               UTF16_LITTLE_ENDIAN,
+                               (__u8 *)out->body.kvp_ip_val.dns_addr,
+                               MAX_IP_ADDR_SIZE);
+
+               out->body.kvp_ip_val.dhcp_enabled = in->kvp_ip_val.dhcp_enabled;
+
+       default:
+               utf16s_to_utf8s((wchar_t *)in->kvp_ip_val.adapter_id,
+                               MAX_ADAPTER_ID_SIZE,
+                               UTF16_LITTLE_ENDIAN,
+                               (__u8 *)out->body.kvp_ip_val.adapter_id,
+                               MAX_ADAPTER_ID_SIZE);
+
+               out->body.kvp_ip_val.addr_family = in->kvp_ip_val.addr_family;
+       }
+}
+
+
+
+
 static void
 kvp_send_key(struct work_struct *dummy)
 {
@@ -237,6 +346,12 @@ kvp_send_key(struct work_struct *dummy)
         */
 
        switch (message->kvp_hdr.operation) {
+       case KVP_OP_SET_IP_INFO:
+               process_ib_ipinfo(in_msg, message, KVP_OP_SET_IP_INFO);
+               break;
+       case KVP_OP_GET_IP_INFO:
+               process_ib_ipinfo(in_msg, message, KVP_OP_GET_IP_INFO);
+               break;
        case KVP_OP_SET:
                switch (in_msg->body.kvp_set.data.value_type) {
                case REG_SZ:
@@ -313,17 +428,19 @@ kvp_send_key(struct work_struct *dummy)
  */
 
 static void
-kvp_respond_to_host(char *key, char *value, int error)
+kvp_respond_to_host(struct hv_kvp_msg *msg_to_host, int error)
 {
        struct hv_kvp_msg  *kvp_msg;
        struct hv_kvp_exchg_msg_value  *kvp_data;
        char    *key_name;
+       char    *value;
        struct icmsg_hdr *icmsghdrp;
        int     keylen = 0;
        int     valuelen = 0;
        u32     buf_len;
        struct vmbus_channel *channel;
        u64     req_id;
+       int ret;
 
        /*
         * If a transaction is not active; log and return.
@@ -376,6 +493,16 @@ kvp_respond_to_host(char *key, char *value, int error)
                        sizeof(struct icmsg_hdr)];
 
        switch (kvp_transaction.kvp_msg->kvp_hdr.operation) {
+       case KVP_OP_GET_IP_INFO:
+               ret = process_ob_ipinfo(msg_to_host,
+                                (struct hv_kvp_ip_msg *)kvp_msg,
+                                KVP_OP_GET_IP_INFO);
+               if (ret < 0)
+                       icmsghdrp->status = HV_E_FAIL;
+
+               goto response_done;
+       case KVP_OP_SET_IP_INFO:
+               goto response_done;
        case KVP_OP_GET:
                kvp_data = &kvp_msg->body.kvp_get.data;
                goto copy_value;
@@ -389,7 +516,7 @@ kvp_respond_to_host(char *key, char *value, int error)
        }
 
        kvp_data = &kvp_msg->body.kvp_enum_data.data;
-       key_name = key;
+       key_name = msg_to_host->body.kvp_enum_data.data.key;
 
        /*
         * The windows host expects the key/value pair to be encoded
@@ -403,6 +530,7 @@ kvp_respond_to_host(char *key, char *value, int error)
        kvp_data->key_size = 2*(keylen + 1); /* utf16 encoding */
 
 copy_value:
+       value = msg_to_host->body.kvp_enum_data.data.value;
        valuelen = utf8s_to_utf16s(value, strlen(value), UTF16_HOST_ENDIAN,
                                (wchar_t *) kvp_data->value,
                                (HV_KVP_EXCHANGE_MAX_VALUE_SIZE / 2) - 2);
@@ -455,7 +583,8 @@ void hv_kvp_onchannelcallback(void *context)
                return;
        }
 
-       vmbus_recvpacket(channel, recv_buffer, PAGE_SIZE, &recvlen, &requestid);
+       vmbus_recvpacket(channel, recv_buffer, PAGE_SIZE * 2, &recvlen,
+                        &requestid);
 
        if (recvlen > 0) {
                icmsghdrp = (struct icmsg_hdr *)&recv_buffer[