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authorVitaly Kuznetsov <vkuznets@redhat.com>2015-04-11 18:07:57 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-05-24 12:17:41 -0700
commitcd8dc0548511efff7a97d978f989ce67a883f9a5 (patch)
tree19f8d9d160bec2423561ba39a0722ea551c2c162 /tools/hv/hv_vss_daemon.c
parentf5722b9bd418e29b7429bd9a43bd100599b26d4f (diff)
downloadlinux-stericsson-cd8dc0548511efff7a97d978f989ce67a883f9a5.tar.gz
Drivers: hv: vss: full handshake support
Introduce VSS_OP_REGISTER1 to support kernel replying to the negotiation message with its own version. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Tested-by: Alex Ng <alexng@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/hv/hv_vss_daemon.c')
-rw-r--r--tools/hv/hv_vss_daemon.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/tools/hv/hv_vss_daemon.c b/tools/hv/hv_vss_daemon.c
index 36f18211afa7..96234b638249 100644
--- a/tools/hv/hv_vss_daemon.c
+++ b/tools/hv/hv_vss_daemon.c
@@ -148,6 +148,8 @@ int main(int argc, char *argv[])
int op;
struct hv_vss_msg vss_msg[1];
int daemonize = 1, long_index = 0, opt;
+ int in_handshake = 1;
+ __u32 kernel_modver;
static struct option long_options[] = {
{"help", no_argument, 0, 'h' },
@@ -211,6 +213,18 @@ int main(int argc, char *argv[])
len = read(vss_fd, vss_msg, sizeof(struct hv_vss_msg));
+ if (in_handshake) {
+ if (len != sizeof(kernel_modver)) {
+ syslog(LOG_ERR, "invalid version negotiation");
+ exit(EXIT_FAILURE);
+ }
+ kernel_modver = *(__u32 *)vss_msg;
+ in_handshake = 0;
+ syslog(LOG_INFO, "VSS: kernel module version: %d",
+ kernel_modver);
+ continue;
+ }
+
if (len != sizeof(struct hv_vss_msg)) {
syslog(LOG_ERR, "read failed; error:%d %s",
errno, strerror(errno));