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Commit 37f7278b authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Greg Kroah-Hartman
Browse files

Drivers: hv: Save and export negotiated vmbus version 



Export the negotiated vmbus version as this may be useful for
individual drivers.

Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 29423b7e

drivers/hv/connection.c

+9 −0
Original line number Diff line number Diff line
@@ -30,6 +30,7 @@ 
#include <linux/slab.h>

#include <linux/vmalloc.h>

#include <linux/hyperv.h>

#include <linux/export.h>

#include <asm/hyperv.h>

#include "hyperv_vmbus.h"
@@ -54,6 +55,12 @@ struct vmbus_connection vmbus_connection = { 


#define VERSION_INVAL -1



/*

 * Negotiated protocol version with the host.

 */

__u32 vmbus_proto_version;

EXPORT_SYMBOL_GPL(vmbus_proto_version);



static __u32 vmbus_get_next_version(__u32 current_version)

{

	switch (current_version) {
@@ -215,6 +222,8 @@ int vmbus_connect(void) 
	if (version == VERSION_INVAL)

		goto cleanup;



	vmbus_proto_version = version;

	pr_info("Negotiated host information %d\n", version);

	kfree(msginfo);

	return 0;

include/linux/hyperv.h

+6 −0
Original line number Diff line number Diff line
@@ -1204,5 +1204,11 @@ int hv_kvp_init(struct hv_util_service *); 
void hv_kvp_deinit(void);

void hv_kvp_onchannelcallback(void *);



/*

 * Negotiated version with the Host.

 */



extern __u32 vmbus_proto_version;



#endif /* __KERNEL__ */

#endif /* _HYPERV_H */