1 files changed, 68 insertions, 0 deletions
diff --git a/kernel/tests/lib/tst_fill_fs.c b/kernel/tests/lib/tst_fill_fs.c
new file mode 100644
index 0000000..121dd2f
--- /dev/null
+++ b/kernel/tests/lib/tst_fill_fs.c
@@ -0,0 +1,68 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2017 Cyril Hrubis <chrubis@suse.cz>
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/statvfs.h>
+
+#define TST_NO_DEFAULT_MAIN
+#include "tst_test.h"
+#include "tst_fs.h"
+
+void tst_fill_fs(const char *path, int verbose)
+{
+	int i = 0;
+	char file[PATH_MAX];
+	char buf[4096];
+	size_t len;
+	ssize_t ret;
+	int fd;
+	struct statvfs fi;
+	statvfs(path, &fi);
+
+	for (;;) {
+		len = random() % (1024 * 102400);
+
+		snprintf(file, sizeof(file), "%s/file%i", path, i++);
+
+		if (verbose)
+			tst_res(TINFO, "Creating file %s size %zu", file, len);
+
+		fd = open(file, O_WRONLY | O_CREAT, 0700);
+		if (fd == -1) {
+			if (errno != ENOSPC)
+				tst_brk(TBROK | TERRNO, "open()");
+
+			tst_res(TINFO | TERRNO, "open()");
+			return;
+		}
+
+		while (len) {
+			ret = write(fd, buf, MIN(len, sizeof(buf)));
+
+			if (ret < 0) {
+				/* retry on ENOSPC to make sure filesystem is really full */
+				if (errno == ENOSPC && len >= fi.f_bsize/2) {
+					SAFE_FSYNC(fd);
+					len /= 2;
+					continue;
+				}
+
+				SAFE_CLOSE(fd);
+
+				if (errno != ENOSPC)
+					tst_brk(TBROK | TERRNO, "write()");
+
+				tst_res(TINFO | TERRNO, "write()");
+				return;
+			}
+
+			len -= ret;
+		}
+
+		SAFE_CLOSE(fd);
+	}
+}