70 lines
1.5 KiB
C
70 lines
1.5 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2021 FUJITSU LIMITED. All rights reserved.
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* Author: Yang Xu <xuyang2018.jy@fujitsu.com>
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*/
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/*\
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* [Description]
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*
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* It is a basic test for shm_next_id.
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*
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* shm_next_id specifies desired id for next allocated IPC shared memory. By
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* default it's equal to -1, which means generic allocation logic.
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* Possible values to set are in range {0..INT_MAX}.
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* The value will be set back to -1 by kernel after successful IPC object
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* allocation.
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*/
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#include <errno.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/ipc.h>
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#include <sys/shm.h>
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#include "tst_test.h"
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#include "tst_safe_sysv_ipc.h"
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#include "libnewipc.h"
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#define NEXT_ID_PATH "/proc/sys/kernel/shm_next_id"
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static int shm_id, pid;
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static key_t shmkey;
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static void verify_shmget(void)
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{
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SAFE_FILE_PRINTF(NEXT_ID_PATH, "%d", pid);
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shm_id = SAFE_SHMGET(shmkey, SHM_SIZE, SHM_RW | IPC_CREAT);
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if (shm_id == pid)
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tst_res(TPASS, "shm_next_id succeeded, shm id %d", pid);
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else
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tst_res(TFAIL, "shm_next_id failed, expected id %d, but got %d", pid, shm_id);
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TST_ASSERT_INT(NEXT_ID_PATH, -1);
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SAFE_SHMCTL(shm_id, IPC_RMID, NULL);
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pid++;
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}
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static void setup(void)
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{
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shmkey = GETIPCKEY();
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pid = getpid();
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}
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static void cleanup(void)
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{
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if (shm_id != -1)
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SAFE_SHMCTL(shm_id, IPC_RMID, NULL);
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}
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static struct tst_test test = {
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.needs_tmpdir = 1,
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.setup = setup,
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.cleanup = cleanup,
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.test_all = verify_shmget,
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.needs_kconfigs = (const char *[]) {
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"CONFIG_CHECKPOINT_RESTORE=y",
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NULL
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},
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.needs_root = 1,
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};
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