fsync-err: write to different offset on each fd

From: Jeff Layton <[email protected]>

NFS currently has slightly different semantics from other fs' and fails this test due to the fact that the same range is overwritten via each fd.

Change it so that each fd overwrites a different region, which is more representative of a real workload anyway.

Reported-by Neil Brown <[email protected]>

Signed-off-by Jeff Layton <[email protected]>

---
 src/fsync-err.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

src/fsync-err.c +2 -2

index 4b0205cf2fd4..146688ddb01e 100644
@@ -106,7 +106,7 @@ int main(int argc, char **argv)
 	memset(buf, 0x7c, bufsize);
 
 	for (i = 0; i < numfds; ++i) {
-		ret = write(fd[i], buf, bufsize);
+		ret = pwrite(fd[i], buf, bufsize, i * bufsize);
 		if (ret < 0) {
 			printf("First write on fd[%d] failed: %m\n", i);
 			return 1;

@@ -149,7 +149,7 @@ int main(int argc, char **argv)
 	}
 
 	for (i = 0; i < numfds; ++i) {
-		ret = write(fd[i], buf, bufsize);
+		ret = pwrite(fd[i], buf, bufsize, i * bufsize);
 		if (ret < 0) {
 			printf("Second write on fd[%d] failed: %m\n", i);
 			return 1;

Signature · 1 line

2.13.5