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