tools: hv: Improve error logging in VSS daemon.

Use errno and strerror() when logging errors to provide more
information.

Signed-off-by: Tomas Hozza <thozza@redhat.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/tools/hv/hv_vss_daemon.c b/tools/hv/hv_vss_daemon.c
index fea03a3..64112e1 100644 (file)
--- a/tools/hv/hv_vss_daemon.c
+++ b/tools/hv/hv_vss_daemon.c
@@ -156,7 +156,8 @@ int main(void)
 
        fd = socket(AF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR);
        if (fd < 0) {
-               syslog(LOG_ERR, "netlink socket creation failed; error:%d", fd);
+               syslog(LOG_ERR, "netlink socket creation failed; error:%d %s",
+                               errno, strerror(errno));
                exit(EXIT_FAILURE);
        }
        addr.nl_family = AF_NETLINK;
@@ -167,7 +168,7 @@ int main(void)
 
        error = bind(fd, (struct sockaddr *)&addr, sizeof(addr));
        if (error < 0) {
-               syslog(LOG_ERR, "bind failed; error:%d", error);
+               syslog(LOG_ERR, "bind failed; error:%d %s", errno, strerror(errno));
                close(fd);
                exit(EXIT_FAILURE);
        }
@@ -187,7 +188,7 @@ int main(void)
 
        len = netlink_send(fd, message);
        if (len < 0) {
-               syslog(LOG_ERR, "netlink_send failed; error:%d", len);
+               syslog(LOG_ERR, "netlink_send failed; error:%d %s", errno, strerror(errno));
                close(fd);
                exit(EXIT_FAILURE);
        }
@@ -241,7 +242,8 @@ int main(void)
                vss_msg->error = error;
                len = netlink_send(fd, incoming_cn_msg);
                if (len < 0) {
-                       syslog(LOG_ERR, "net_link send failed; error:%d", len);
+                       syslog(LOG_ERR, "net_link send failed; error:%d %s",
+                                       errno, strerror(errno));
                        exit(EXIT_FAILURE);
                }
        }