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drivers: hv: kvp: Cleanup the kernel/user protocol

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Now, cleanup the user/kernel KVP protocol by using the same structure
definition that is used for host/guest KVP protocol. This simplifies the code.

Signed-off-by: K. Y. Srinivasan <[email protected]>
Signed-off-by: Haiyang Zhang <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
K. Y. Srinivasan 2012-02-02 16:56:50 -08:00 • committed by Greg Kroah-Hartman
commit 2640335438
3 changed files with 45 additions and 56 deletions
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41
drivers/hv/hv_kvp.c
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@ -71,15 +71,20 @@ kvp_register(void)
{
struct cn_msg *msg;
struct hv_kvp_msg *kvp_msg;
char *version;
msg = kzalloc(sizeof(*msg) + strlen(HV_DRV_VERSION) + 1 , GFP_ATOMIC);
msg = kzalloc(sizeof(*msg) + sizeof(struct hv_kvp_msg), GFP_ATOMIC);
if (msg) {
kvp_msg = (struct hv_kvp_msg *)msg->data;
version = kvp_msg->body.kvp_version;
msg->id.idx = CN_KVP_IDX;
msg->id.val = CN_KVP_VAL;
msg->seq = KVP_REGISTER;
strcpy(msg->data, HV_DRV_VERSION);
msg->len = strlen(HV_DRV_VERSION) + 1;
kvp_msg->kvp_hdr.operation = KVP_OP_REGISTER;
strcpy(version, HV_DRV_VERSION);
msg->len = sizeof(struct hv_kvp_msg);
cn_netlink_send(msg, 0, GFP_ATOMIC);
kfree(msg);
}
@ -101,23 +106,24 @@ kvp_work_func(struct work_struct *dummy)
static void
kvp_cn_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp)
{
struct hv_ku_msg *message;
struct hv_kvp_msg *message;
struct hv_kvp_msg_enumerate *data;
message = (struct hv_ku_msg *)msg->data;
if (msg->seq == KVP_REGISTER) {
message = (struct hv_kvp_msg *)msg->data;
if (message->kvp_hdr.operation == KVP_OP_REGISTER) {
pr_info("KVP: user-mode registering done.\n");
kvp_register();
}
if (msg->seq == KVP_USER_SET) {
if (message->kvp_hdr.operation == KVP_OP_ENUMERATE) {
data = &message->body.kvp_enum_data;
/*
* Complete the transaction by forwarding the key value
* to the host. But first, cancel the timeout.
*/
if (cancel_delayed_work_sync(&kvp_work))
kvp_respond_to_host(message->kvp_key,
message->kvp_value,
!strlen(message->kvp_key));
kvp_respond_to_host(data->data.key, data->data.value,
!strlen(data->data.key));
}
}
@ -125,6 +131,7 @@ static void
kvp_send_key(struct work_struct *dummy)
{
struct cn_msg *msg;
struct hv_kvp_msg *message;
int index = kvp_transaction.index;
msg = kzalloc(sizeof(*msg) + sizeof(struct hv_kvp_msg) , GFP_ATOMIC);
@ -132,9 +139,11 @@ kvp_send_key(struct work_struct *dummy)
if (msg) {
msg->id.idx = CN_KVP_IDX;
msg->id.val = CN_KVP_VAL;
msg->seq = KVP_KERNEL_GET;
((struct hv_ku_msg *)msg->data)->kvp_index = index;
msg->len = sizeof(struct hv_ku_msg);
message = (struct hv_kvp_msg *)msg->data;
message->kvp_hdr.operation = KVP_OP_ENUMERATE;
message->body.kvp_enum_data.index = index;
msg->len = sizeof(struct hv_kvp_msg);
cn_netlink_send(msg, 0, GFP_ATOMIC);
kfree(msg);
}
@ -191,7 +200,7 @@ kvp_respond_to_host(char *key, char *value, int error)
kvp_msg = (struct hv_kvp_msg *)
&recv_buffer[sizeof(struct vmbuspipe_hdr) +
sizeof(struct icmsg_hdr)];
kvp_data = &kvp_msg->kvp_data;
kvp_data = &kvp_msg->body.kvp_enum_data;
key_name = key;
/*
@ -266,7 +275,7 @@ void hv_kvp_onchannelcallback(void *context)
sizeof(struct vmbuspipe_hdr) +
sizeof(struct icmsg_hdr)];
kvp_data = &kvp_msg->kvp_data;
kvp_data = &kvp_msg->body.kvp_enum_data;
/*
* We only support the "get" operation on