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authorVitaly Kuznetsov <vkuznets@redhat.com>2015-04-11 18:07:58 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-05-24 12:17:42 -0700
commita4d1ee5b0255a135fead1d62a7fc7e6fe718b66e (patch)
treeb8dd663c221c93ad4655231141b951d2827f461c /tools/hv
parentcd8dc0548511efff7a97d978f989ce67a883f9a5 (diff)
downloadlinux-stericsson-a4d1ee5b0255a135fead1d62a7fc7e6fe718b66e.tar.gz
Drivers: hv: fcopy: full handshake support
Introduce FCOPY_VERSION_1 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')
-rw-r--r--tools/hv/hv_fcopy_daemon.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/tools/hv/hv_fcopy_daemon.c b/tools/hv/hv_fcopy_daemon.c
index 9445d8f264a4..5480e4e424eb 100644
--- a/tools/hv/hv_fcopy_daemon.c
+++ b/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) {