Add support for options being a power-of-2

[fio.git] / parse.c

diff --git a/parse.c b/parse.c
index e70ed20bda7e64b3727e93cacad71de65148862b..745056bdc8186e54743d2fb688df926084c91853 100644 (file)
--- a/parse.c
+++ b/parse.c
@@ -17,6 +17,7 @@
 #include "options.h"
 #include "minmax.h"
 #include "lib/ieee754.h"
+#include "lib/pow2.h"
 
 #ifdef CONFIG_ARITHMETIC
 #include "y.tab.h"
@@ -506,6 +507,7 @@ static int __handle_option(struct fio_option *o, const char *ptr, void *data,
                if (!is_time && o->is_time)
                        is_time = o->is_time;
 
+               tmp[sizeof(tmp) - 1] = '\0';
                strncpy(tmp, ptr, sizeof(tmp) - 1);
                p = strchr(tmp, ',');
                if (p)
@@ -520,6 +522,10 @@ static int __handle_option(struct fio_option *o, const char *ptr, void *data,
 
                if (ret)
                        break;
+               if (o->pow2 && !is_power_of_2(ull)) {
+                       log_err("%s: must be a power-of-2\n", o->name);
+                       return 1;
+               }
 
                if (o->maxval && ull > o->maxval) {
                        log_err("max value out of range: %llu"
@@ -705,6 +711,7 @@ static int __handle_option(struct fio_option *o, const char *ptr, void *data,
                char tmp[128];
                char *p1, *p2;
 
+               tmp[sizeof(tmp) - 1] = '\0';
                strncpy(tmp, ptr, sizeof(tmp) - 1);
 
                /* Handle bsrange with separate read,write values: */