These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / tools / hv / hv_fcopy_daemon.c

diff --git a/kernel/tools/hv/hv_fcopy_daemon.c b/kernel/tools/hv/hv_fcopy_daemon.c
index 9445d8f..5480e4e 100644 (file)
--- a/kernel/tools/hv/hv_fcopy_daemon.c
+++ b/kernel/tools/hv/hv_fcopy_daemon.c
@@ -137,6 +137,8 @@ int main(int argc, char *argv[])
        int version = FCOPY_CURRENT_VERSION;
        char *buffer[4096 * 2];
        struct hv_fcopy_hdr *in_msg;
+       int in_handshake = 1;
+       __u32 kernel_modver;
 
        static struct option long_options[] = {
                {"help",        no_argument,       0,  'h' },
@@ -191,6 +193,19 @@ int main(int argc, char *argv[])
                        syslog(LOG_ERR, "pread failed: %s", strerror(errno));
                        exit(EXIT_FAILURE);
                }
+
+               if (in_handshake) {
+                       if (len != sizeof(kernel_modver)) {
+                               syslog(LOG_ERR, "invalid version negotiation");
+                               exit(EXIT_FAILURE);
+                       }
+                       kernel_modver = *(__u32 *)buffer;
+                       in_handshake = 0;
+                       syslog(LOG_INFO, "HV_FCOPY: kernel module version: %d",
+                              kernel_modver);
+                       continue;
+               }
+
                in_msg = (struct hv_fcopy_hdr *)buffer;
 
                switch (in_msg->operation) {