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| author | K. Y. Srinivasan <kys@microsoft.com> | 2013-07-02 10:31:30 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-07-26 16:40:41 -0700 |
| commit | 6741335bc7294548ac95cb1f4671991ff30da193 (patch) | |
| tree | b5930cd4e558ff76838966e8a23941352acf9a0e /drivers/hv/hv_util.c | |
| parent | d12e14692448e9f256028f53926a9bd3c3091e11 (diff) | |
| download | lwn-6741335bc7294548ac95cb1f4671991ff30da193.tar.gz lwn-6741335bc7294548ac95cb1f4671991ff30da193.zip | |
Drivers: hv: util: Fix a bug in version negotiation code for util services
The current code picked the highest version advertised by the host. WS2012 R2
has implemented a protocol version for KVP that is not compatible with prior
protocol versions of KVP. Fix the bug in the current code by explicitly specifying
the protocol version that the guest can support.
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>
Diffstat (limited to 'drivers/hv/hv_util.c')
| -rw-r--r-- | drivers/hv/hv_util.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/drivers/hv/hv_util.c b/drivers/hv/hv_util.c index 2f561c5dfe24..c16164d4a28b 100644 --- a/drivers/hv/hv_util.c +++ b/drivers/hv/hv_util.c @@ -28,6 +28,18 @@ #include <linux/reboot.h> #include <linux/hyperv.h> +#define SHUTDOWN_MAJOR 3 +#define SHUTDOWN_MINOR 0 +#define SHUTDOWN_MAJOR_MINOR (SHUTDOWN_MAJOR << 16 | SHUTDOWN_MINOR) + +#define TIMESYNCH_MAJOR 3 +#define TIMESYNCH_MINOR 0 +#define TIMESYNCH_MAJOR_MINOR (TIMESYNCH_MAJOR << 16 | TIMESYNCH_MINOR) + +#define HEARTBEAT_MAJOR 3 +#define HEARTBEAT_MINOR 0 +#define HEARTBEAT_MAJOR_MINOR (HEARTBEAT_MAJOR << 16 | HEARTBEAT_MINOR) + static void shutdown_onchannelcallback(void *context); static struct hv_util_service util_shutdown = { .util_cb = shutdown_onchannelcallback, @@ -87,7 +99,8 @@ static void shutdown_onchannelcallback(void *context) if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) { vmbus_prep_negotiate_resp(icmsghdrp, negop, - shut_txf_buf, MAX_SRV_VER, MAX_SRV_VER); + shut_txf_buf, UTIL_FW_MAJOR_MINOR, + SHUTDOWN_MAJOR_MINOR); } else { shutdown_msg = (struct shutdown_msg_data *)&shut_txf_buf[ @@ -213,7 +226,8 @@ static void timesync_onchannelcallback(void *context) if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) { vmbus_prep_negotiate_resp(icmsghdrp, NULL, time_txf_buf, - MAX_SRV_VER, MAX_SRV_VER); + UTIL_FW_MAJOR_MINOR, + TIMESYNCH_MAJOR_MINOR); } else { timedatap = (struct ictimesync_data *)&time_txf_buf[ sizeof(struct vmbuspipe_hdr) + @@ -253,7 +267,8 @@ static void heartbeat_onchannelcallback(void *context) if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) { vmbus_prep_negotiate_resp(icmsghdrp, NULL, - hbeat_txf_buf, MAX_SRV_VER, MAX_SRV_VER); + hbeat_txf_buf, UTIL_FW_MAJOR_MINOR, + HEARTBEAT_MAJOR_MINOR); } else { heartbeat_msg = (struct heartbeat_msg_data *)&hbeat_txf_buf[ |