diff options
| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2015-04-12 04:07:58 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-05-24 22:17:42 +0300 |
| commit | a4d1ee5b0255a135fead1d62a7fc7e6fe718b66e (patch) | |
| tree | b8dd663c221c93ad4655231141b951d2827f461c /tools/hv/hv_fcopy_daemon.c | |
| parent | cd8dc0548511efff7a97d978f989ce67a883f9a5 (diff) | |
| download | linux-a4d1ee5b0255a135fead1d62a7fc7e6fe718b66e.tar.xz | |
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/hv_fcopy_daemon.c')
| -rw-r--r-- | tools/hv/hv_fcopy_daemon.c | 15 |
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) { |