105 lines
2.7 KiB
C
105 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright (c) 2020 FUJITSU LIMITED. All rights reserved.
|
|
* Author: Yang Xu <xuyang2018.jy@cn.jujitsu.com>
|
|
*
|
|
* This is a basic test about MSG_COPY flag.
|
|
* This flag was added in 3.8 for the implementation of the kernel checkpoint
|
|
* restore facility and is available only if the kernel was built with the
|
|
* CONFIG_CHECKPOINT_RESTORE option.
|
|
* On old kernel without this support, it only ignores this flag and doesn't
|
|
* report ENOSYS/EINVAL error. The CONFIG_CHECKPOINT_RESTORE has existed
|
|
* before kernel 3.8.
|
|
* So for using this flag, kernel should greater than 3.8 and enable
|
|
* CONFIG_CHECKPOINT_RESTORE together.
|
|
*
|
|
* 1)msgrcv(2) fails and sets errno to EINVAL if IPC_NOWAIT was not specified
|
|
* in msgflag.
|
|
* 2)msgrcv(2) fails and sets errno to EINVAL if IPC_EXCEPT was specified
|
|
* in msgflag.
|
|
* 3)msgrcv(2) fails and set errno to ENOMSG if IPC_NOWAIT and MSG_COPY were
|
|
* specified in msgflg and the queue contains less than msgtyp messages.
|
|
*/
|
|
|
|
#define _GNU_SOURCE
|
|
#include <string.h>
|
|
#include <sys/wait.h>
|
|
#include <pwd.h>
|
|
#include "tst_test.h"
|
|
#include "tst_safe_sysv_ipc.h"
|
|
#include "libnewipc.h"
|
|
#include "lapi/msg.h"
|
|
|
|
static key_t msgkey;
|
|
static int queue_id = -1;
|
|
static struct buf {
|
|
long type;
|
|
char mtext[MSGSIZE];
|
|
} rcv_buf, snd_buf = {MSGTYPE, "hello"};
|
|
|
|
static struct tcase {
|
|
int exp_err;
|
|
int msg_flag;
|
|
int msg_type;
|
|
char *message;
|
|
} tcases[] = {
|
|
{EINVAL, 0, MSGTYPE,
|
|
"EINVAL for MSG_COPY without IPC_NOWAIT"},
|
|
|
|
{EINVAL, MSG_EXCEPT, MSGTYPE,
|
|
"EINVAL for MSG_COPY with MSG_EXCEPT"},
|
|
|
|
{ENOMSG, IPC_NOWAIT, 2,
|
|
"ENOMSG with IPC_NOWAIT and MSG_COPY but with less than msgtyp messages"},
|
|
};
|
|
|
|
static void verify_msgrcv(unsigned int n)
|
|
{
|
|
struct tcase *tc = &tcases[n];
|
|
|
|
tst_res(TINFO, "%s", tc->message);
|
|
|
|
TEST(msgrcv(queue_id, &rcv_buf, MSGSIZE, tc->msg_type, MSG_COPY | tc->msg_flag));
|
|
if (TST_RET != -1) {
|
|
tst_res(TFAIL, "msgrcv() succeeded unexpectedly");
|
|
SAFE_MSGSND(queue_id, &snd_buf, MSGSIZE, 0);
|
|
return;
|
|
}
|
|
|
|
if (TST_ERR == tc->exp_err) {
|
|
tst_res(TPASS | TTERRNO, "msgrcv() failed as expected");
|
|
return;
|
|
}
|
|
|
|
tst_res(TFAIL | TTERRNO,
|
|
"msgrcv() failed unexpectedly, expected %s got",
|
|
tst_strerrno(tc->exp_err));
|
|
}
|
|
|
|
static void setup(void)
|
|
{
|
|
msgkey = GETIPCKEY();
|
|
queue_id = SAFE_MSGGET(msgkey, IPC_CREAT | IPC_EXCL | MSG_RW);
|
|
SAFE_MSGSND(queue_id, &snd_buf, MSGSIZE, 0);
|
|
}
|
|
|
|
static void cleanup(void)
|
|
{
|
|
if (queue_id != -1)
|
|
SAFE_MSGCTL(queue_id, IPC_RMID, NULL);
|
|
}
|
|
|
|
static struct tst_test test = {
|
|
.needs_tmpdir = 1,
|
|
.needs_root = 1,
|
|
.needs_kconfigs = (const char *[]) {
|
|
"CONFIG_CHECKPOINT_RESTORE",
|
|
NULL
|
|
},
|
|
.min_kver = "3.8.0",
|
|
.tcnt = ARRAY_SIZE(tcases),
|
|
.test = verify_msgrcv,
|
|
.setup = setup,
|
|
.cleanup = cleanup,
|
|
};
|