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
...@@ -30,6 +30,7 @@ ...@@ -30,6 +30,7 @@
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/vmalloc.h> #include <linux/vmalloc.h>
#include <linux/hyperv.h> #include <linux/hyperv.h>
#include <linux/export.h>
#include <asm/hyperv.h> #include <asm/hyperv.h>
#include "hyperv_vmbus.h" #include "hyperv_vmbus.h"
...@@ -54,6 +55,12 @@ struct vmbus_connection vmbus_connection = { ...@@ -54,6 +55,12 @@ struct vmbus_connection vmbus_connection = {
#define VERSION_INVAL -1 #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) static __u32 vmbus_get_next_version(__u32 current_version)
{ {
switch (current_version) { switch (current_version) {
...@@ -215,6 +222,8 @@ int vmbus_connect(void) ...@@ -215,6 +222,8 @@ int vmbus_connect(void)
if (version == VERSION_INVAL) if (version == VERSION_INVAL)
goto cleanup; goto cleanup;
vmbus_proto_version = version;
pr_info("Negotiated host information %d\n", version);
kfree(msginfo); kfree(msginfo);
return 0; return 0;
......
...@@ -1204,5 +1204,11 @@ int hv_kvp_init(struct hv_util_service *); ...@@ -1204,5 +1204,11 @@ int hv_kvp_init(struct hv_util_service *);
void hv_kvp_deinit(void); void hv_kvp_deinit(void);
void hv_kvp_onchannelcallback(void *); void hv_kvp_onchannelcallback(void *);
/*
* Negotiated version with the Host.
*/
extern __u32 vmbus_proto_version;
#endif /* __KERNEL__ */ #endif /* __KERNEL__ */
#endif /* _HYPERV_H */ #endif /* _HYPERV_H */
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