// SPDX-License-Identifier: GPL-2.0-or-later // Copyright (c) 2024 Christian Brauner <brauner@kernel.org> #define _GNU_SOURCE #include <fcntl.h> #include <sched.h> #include <stdio.h> #include <string.h> #include <sys/stat.h> #include <sys/mount.h> #include <unistd.h> #include "statmount.h" #include "../../kselftest_harness.h" #ifndef LISTMOUNT_REVERSE #define LISTMOUNT_REVERSE (1 << 0) /* List later mounts first */ #endif #define LISTMNT_BUFFER 10 /* Check that all mount ids are in increasing order. */ TEST(listmount_forward) { uint64_t list[LISTMNT_BUFFER], last_mnt_id = 0; for (;;) { ssize_t nr_mounts; nr_mounts = listmount(LSMT_ROOT, 0, last_mnt_id, list, LISTMNT_BUFFER, 0); ASSERT_GE(nr_mounts, 0); if (nr_mounts == 0) break; for (size_t cur = 0; cur < nr_mounts; cur++) { if (cur < nr_mounts - 1) ASSERT_LT(list[cur], list[cur + 1]); last_mnt_id = list[cur]; } } } /* Check that all mount ids are in decreasing order. */ TEST(listmount_backward) { uint64_t list[LISTMNT_BUFFER], last_mnt_id = 0; for (;;) { ssize_t nr_mounts; nr_mounts = listmount(LSMT_ROOT, 0, last_mnt_id, list, LISTMNT_BUFFER, LISTMOUNT_REVERSE); ASSERT_GE(nr_mounts, 0); if (nr_mounts == 0) break; for (size_t cur = 0; cur < nr_mounts; cur++) { if (cur < nr_mounts - 1) ASSERT_GT(list[cur], list[cur + 1]); last_mnt_id = list[cur]; } } } TEST_HARNESS_MAIN