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store and load random seed #6

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store and load random seed #6

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3e87874
store random seed for later recovery
xwang1498 Jan 18, 2025
5cda1d6
read random seed from file when in readonly/verify mode
xwang1498 Jan 18, 2025
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26 changes: 23 additions & 3 deletions disk-filltest.c
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Original file line number Diff line number Diff line change
Expand Up @@ -49,7 +49,7 @@
#endif

/* random seed used */
unsigned int g_seed;
unsigned int g_seed = 0;

/* only perform read operation */
int gopt_readonly = 0;
Expand Down Expand Up @@ -260,6 +260,8 @@ void unlink_randfiles(void)

if (filenum > 0)
printf(" total: %u.\n", filenum);

unlink("random-seed");
}

/* fill disk */
Expand Down Expand Up @@ -288,6 +290,14 @@ void write_randfiles(void)

printf("Writing files random-######## with seed %u\n", g_seed);

if (!gopt_unlink_immediate) {
FILE *fp = fopen("random-seed", "w");
if (fp != NULL) {
fprintf(fp, "%u", g_seed);
fclose(fp);
}
}

while (!done && filenum < gopt_file_limit)
{
char filename[32], eta[64];
Expand Down Expand Up @@ -516,10 +526,20 @@ int main(int argc, char* argv[])
{
int r;

g_seed = time(NULL);

parse_commandline(argc, argv);

if (gopt_readonly && !g_seed) {
FILE *fp = fopen("random-seed", "r");
if (fp != NULL) {
fscanf(fp, "%u", &g_seed);
fclose(fp);
}
}

if (!g_seed) {
g_seed = time(NULL);
}

for (r = 0; r < gopt_repeat; ++r)
{
if (gopt_readonly)
Expand Down