Add verify_pattern option
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/verify.c b/verify.c
index d98dfcf..5770b46 100644
--- a/verify.c
+++ b/verify.c
@@ -8,8 +8,7 @@
#include "fio.h"
-static void fill_random_bytes(struct thread_data *td,
- void *p, unsigned int len)
+static void fill_random_bytes(struct thread_data *td, void *p, unsigned int len)
{
unsigned int todo;
int r;
@@ -32,9 +31,52 @@
}
}
-void memswp(void* buf1, void* buf2, unsigned int len)
+static void fill_pattern(struct thread_data *td, void *p, unsigned int len)
+{
+ switch (td->o.verify_pattern_bytes) {
+ case 0:
+ fill_random_bytes(td, p, len);
+ break;
+ case 1:
+ memset(p, td->o.verify_pattern, len);
+ break;
+ case 2:
+ case 3:
+ case 4: {
+ unsigned int pattern = td->o.verify_pattern;
+ unsigned int i = 0;
+ unsigned char c1, c2, c3, c4;
+ unsigned char *b = p;
+
+ c1 = pattern & 0xff;
+ pattern >>= 8;
+ c2 = pattern & 0xff;
+ pattern >>= 8;
+ c3 = pattern & 0xff;
+ pattern >>= 8;
+ c4 = pattern & 0xff;
+
+ while (i < len) {
+ b[i++] = c1;
+ if (i == len)
+ break;
+ b[i++] = c2;
+ if (td->o.verify_pattern_bytes == 2 || i == len)
+ continue;
+ b[i++] = c3;
+ if (td->o.verify_pattern_bytes == 3 || i == len)
+ continue;
+ b[i++] = c4;
+ }
+ break;
+ }
+ }
+}
+
+static void memswp(void* buf1, void* buf2, unsigned int len)
{
struct verify_header swap;
+
memcpy(&swap, buf1, len);
memcpy(buf1, buf2, len);
memcpy(buf2, &swap, len);
@@ -254,7 +296,7 @@
if (td->o.verify == VERIFY_NULL)
return;
- fill_random_bytes(td, p, io_u->buflen);
+ fill_pattern(td, p, io_u->buflen);
hdr_inc = io_u->buflen;
if (td->o.verify_interval)