From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yang Xu Date: Fri, 23 Jul 2021 17:41:59 +0800 Subject: [LTP] [PATCH v2 1/2] syscalls/shmget05: Add test for /proc/sys/kernel/shm_next_id In-Reply-To: References: Message-ID: <1627033320-1584-1-git-send-email-xuyang2018.jy@fujitsu.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: ltp@lists.linux.it This case is similar to msgget04.c. Reviewed-by: Cyril Hrubis Signed-off-by: Yang Xu --- runtest/syscalls | 1 + runtest/syscalls-ipc | 1 + .../kernel/syscalls/ipc/shmget/.gitignore | 1 + .../kernel/syscalls/ipc/shmget/shmget05.c | 69 +++++++++++++++++++ 4 files changed, 72 insertions(+) create mode 100644 testcases/kernel/syscalls/ipc/shmget/shmget05.c diff --git a/runtest/syscalls b/runtest/syscalls index 1deb6118f..b65b18c32 100644 --- a/runtest/syscalls +++ b/runtest/syscalls @@ -1412,6 +1412,7 @@ shmdt02 shmdt02 shmget02 shmget02 shmget03 shmget03 shmget04 shmget04 +shmget05 shmget05 sigaction01 sigaction01 sigaction02 sigaction02 diff --git a/runtest/syscalls-ipc b/runtest/syscalls-ipc index b3bd37923..ff0364704 100644 --- a/runtest/syscalls-ipc +++ b/runtest/syscalls-ipc @@ -67,3 +67,4 @@ shmdt02 shmdt02 shmget02 shmget02 shmget03 shmget03 shmget04 shmget04 +shmget05 shmget05 diff --git a/testcases/kernel/syscalls/ipc/shmget/.gitignore b/testcases/kernel/syscalls/ipc/shmget/.gitignore index c57df68f5..6f08529f8 100644 --- a/testcases/kernel/syscalls/ipc/shmget/.gitignore +++ b/testcases/kernel/syscalls/ipc/shmget/.gitignore @@ -1,3 +1,4 @@ /shmget02 /shmget03 /shmget04 +/shmget05 diff --git a/testcases/kernel/syscalls/ipc/shmget/shmget05.c b/testcases/kernel/syscalls/ipc/shmget/shmget05.c new file mode 100644 index 000000000..42a115474 --- /dev/null +++ b/testcases/kernel/syscalls/ipc/shmget/shmget05.c @@ -0,0 +1,69 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2021 FUJITSU LIMITED. All rights reserved. + * Author: Yang Xu + */ + +/*\ + * [Description] + * + * It is a basic test for shm_next_id. + * + * shm_next_id specifies desired id for next allocated IPC shared memory. By + * default it's equal to -1, which means generic allocation logic. + * Possible values to set are in range {0..INT_MAX}. + * The value will be set back to -1 by kernel after successful IPC object + * allocation. + */ + +#include +#include +#include +#include +#include +#include "tst_test.h" +#include "tst_safe_sysv_ipc.h" +#include "libnewipc.h" + +#define NEXT_ID_PATH "/proc/sys/kernel/shm_next_id" +static int shm_id, pid; +static key_t shmkey; + +static void verify_shmget(void) +{ + SAFE_FILE_PRINTF(NEXT_ID_PATH, "%d", pid); + + shm_id = SAFE_SHMGET(shmkey, SHM_SIZE, SHM_RW | IPC_CREAT); + if (shm_id == pid) + tst_res(TPASS, "shm_next_id succeeded, shm id %d", pid); + else + tst_res(TFAIL, "shm_next_id failed, expected id %d, but got %d", pid, shm_id); + + TST_ASSERT_INT(NEXT_ID_PATH, -1); + SAFE_SHMCTL(shm_id, IPC_RMID, NULL); + pid++; +} + +static void setup(void) +{ + shmkey = GETIPCKEY(); + pid = getpid(); +} + +static void cleanup(void) +{ + if (shm_id != -1) + SAFE_SHMCTL(shm_id, IPC_RMID, NULL); +} + +static struct tst_test test = { + .needs_tmpdir = 1, + .setup = setup, + .cleanup = cleanup, + .test_all = verify_shmget, + .needs_kconfigs = (const char *[]) { + "CONFIG_CHECKPOINT_RESTORE=y", + NULL + }, + .needs_root = 1, +}; -- 2.23.0