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// SPDX-License-Identifier: GPL-2.0-or-later
#include <dirent.h>
#include <errno.h>
#include <sys/mount.h>
#define TST_NO_DEFAULT_MAIN
#include "tst_test.h"
#include "tst_fs.h"
#define TST_FS_SETUP_OVERLAYFS_MSG "overlayfs is not configured in this kernel"
#define TST_FS_SETUP_OVERLAYFS_CONFIG "lowerdir="OVL_LOWER",upperdir="OVL_UPPER",workdir="OVL_WORK
void create_overlay_dirs(void)
{
DIR *dir = opendir(OVL_LOWER);
if (dir == NULL) {
SAFE_MKDIR(OVL_LOWER, 0755);
SAFE_MKDIR(OVL_UPPER, 0755);
SAFE_MKDIR(OVL_WORK, 0755);
SAFE_MKDIR(OVL_MNT, 0755);
return;
}
closedir(dir);
}
int mount_overlay(const char *file, const int lineno, int skip)
{
int ret;
create_overlay_dirs();
ret = mount("overlay", OVL_MNT, "overlay", 0,
TST_FS_SETUP_OVERLAYFS_CONFIG);
if (ret == 0)
return 0;
if (errno == ENODEV) {
if (skip) {
tst_brk(TCONF, "%s:%d: " TST_FS_SETUP_OVERLAYFS_MSG,
file, lineno);
} else {
tst_res(TINFO, "%s:%d: " TST_FS_SETUP_OVERLAYFS_MSG,
file, lineno);
}
} else {
tst_brk(TBROK | TERRNO, "overlayfs mount failed");
}
return ret;
}
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