101 lines
2.4 KiB
C
101 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) International Business Machines Corp., 2004
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* Copyright (c) Linux Test Project, 2004-2017
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*
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* DESCRIPTION
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* hugeshmget03 - test for ENOSPC error
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*
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* HISTORY
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* 03/2001 - Written by Wayne Boyer
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* 04/2004 - Updated by Robbie Williamson
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*/
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#include <limits.h>
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#include "hugetlb.h"
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/*
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* The MAXIDS value is somewhat arbitrary and may need to be increased
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* depending on the system being tested.
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*/
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#define MAXIDS 8192
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#define PATH_SHMMNI "/proc/sys/kernel/shmmni"
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static size_t shm_size;
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static int shm_id_1 = -1;
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static int num_shms;
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static int shm_id_arr[MAXIDS];
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static long orig_shmmni = -1;
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static void test_hugeshmget(void)
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{
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TEST(shmget(IPC_PRIVATE, shm_size,
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SHM_HUGETLB | IPC_CREAT | IPC_EXCL | SHM_RW));
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if (TST_RET != -1) {
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tst_res(TFAIL, "shmget succeeded unexpectedly");
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return;
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}
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if (TST_ERR == ENOSPC)
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tst_res(TPASS | TTERRNO, "shmget failed as expected");
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else
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tst_res(TFAIL | TTERRNO, "shmget failed unexpectedly "
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"- expect errno=ENOSPC, got");
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}
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static void setup(void)
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{
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long hpage_size;
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if (tst_hugepages == 0)
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tst_brk(TCONF, "No enough hugepages for testing.");
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SAFE_FILE_SCANF(PATH_SHMMNI, "%ld", &orig_shmmni);
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SAFE_FILE_PRINTF(PATH_SHMMNI, "%ld", tst_hugepages / 2);
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hpage_size = SAFE_READ_MEMINFO("Hugepagesize:") * 1024;
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shm_size = hpage_size;
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/*
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* Use a while loop to create the maximum number of memory segments.
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* If the loop exceeds MAXIDS, then break the test and cleanup.
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*/
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num_shms = 0;
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shm_id_1 = shmget(IPC_PRIVATE, shm_size,
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SHM_HUGETLB | IPC_CREAT | IPC_EXCL | SHM_RW);
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while (shm_id_1 != -1) {
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shm_id_arr[num_shms++] = shm_id_1;
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if (num_shms == MAXIDS)
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tst_brk(TBROK, "The maximum number of "
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"shared memory ID's has been reached. "
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"Please increase the MAXIDS value in "
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"the test.");
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shm_id_1 = shmget(IPC_PRIVATE, shm_size,
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SHM_HUGETLB | IPC_CREAT | IPC_EXCL | SHM_RW);
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}
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if (errno != ENOSPC)
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tst_brk(TBROK | TERRNO, "shmget #setup");
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}
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static void cleanup(void)
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{
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int i;
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for (i = 0; i < num_shms; i++)
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rm_shm(shm_id_arr[i]);
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if (orig_shmmni != -1)
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FILE_PRINTF(PATH_SHMMNI, "%ld", orig_shmmni);
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}
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static struct tst_test test = {
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.needs_root = 1,
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.options = (struct tst_option[]) {
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{"s:", &nr_opt, "-s num Set the number of the been allocated hugepages"},
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{}
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},
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.setup = setup,
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.cleanup = cleanup,
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.test_all = test_hugeshmget,
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.request_hugepages = 128,
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};
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