diff options
Diffstat (limited to 'src/kernel/utils.c')
| -rw-r--r-- | src/kernel/utils.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/kernel/utils.c b/src/kernel/utils.c index 957d69b..164d51a 100644 --- a/src/kernel/utils.c +++ b/src/kernel/utils.c @@ -2,6 +2,7 @@ * This file is part of the Distributed Network Block Device 3 * * Copyright(c) 2011-2012 Johann Latocha <johann@latocha.de> + * Copyright(c) 2019 Frederic Robra <frederic@robra.org> * * This file may be licensed under the terms of of the * GNU General Public License Version 2 (the ``GPL''). @@ -19,6 +20,7 @@ */ #include "utils.h" +#include "clientconfig.h" #include <linux/kernel.h> @@ -40,3 +42,20 @@ void inet_ntoa(struct in_addr addr, char *str) unsigned char *ptr = (unsigned char *) &addr; sprintf(str, "%d.%d.%d.%d", ptr[0] & 0xff, ptr[1] & 0xff, ptr[2] & 0xff, ptr[3] & 0xff); } + +uint64_t dnbd3_average_rtt(struct dnbd3_server *server) +{ + int i, j = 0; + uint64_t avg = 0; + for (i = 0; i < 4; i++) { + avg += server->rtts[i]; + j += server->rtts[i] == 0 ? 0 : 1; + } + if (avg == 0) { + return RTT_UNKNOWN; + } else { + avg = avg / j; + avg += server->failures * avg / 10; + return avg; + } +} |