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zdtm: add test for memfd_secret
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Adds a zdtm test to test checkpoint/restore a memfd_secret fd
containing process.

Signed-off-by: Dhanuka Warusadura <csx@tuta.io>
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warusadura committed Oct 15, 2023
1 parent d8af0b0 commit e7f3ddc
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1 change: 1 addition & 0 deletions test/zdtm/static/Makefile
Original file line number Diff line number Diff line change
Expand Up @@ -260,6 +260,7 @@ TST_NOFILE := \
memfd03 \
memfd04 \
memfd05 \
memfd-secret00 \
shmemfd \
shmemfd-priv \
time \
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79 changes: 79 additions & 0 deletions test/zdtm/static/memfd-secret00.c
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@@ -0,0 +1,79 @@
#include <stdio.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/syscall.h>
#include <unistd.h>

#include "zdtmtst.h"

#define SECRET "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
#define SIZE 26

const char *test_doc = "memfd_secret file descriptor";
const char *test_author = "Dhanuka Warusadura <csx@tuta.io>";

#ifndef __NR_memfd_secret
#define __NR_memfd_secret 447
#endif

static int _memfd_secret(unsigned int flags)
{
return syscall(__NR_memfd_secret, flags);
}

static void *secret_init(size_t size)
{
int fd;
void *secretmem = NULL;

fd = _memfd_secret(0);
if (fd < 0)
return secretmem;

if (ftruncate(fd, size) < 0) {
close(fd);
return secretmem;
}

secretmem = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (secretmem == MAP_FAILED) {
close(fd);
return secretmem;
}

return secretmem;
}

static void secret_fini(void *mem, size_t size)
{
munmap(mem, size);
}

int main(int argc, char *argv[])
{
char *secretmem;

test_init(argc, argv);

secretmem = secret_init(SIZE);
if (!secretmem) {
fail("memfd_secret: not supported operation");
return 1;
}

memcpy(secretmem, SECRET, SIZE);

test_daemon();
test_waitsig();

if (strncmp(secretmem, SECRET, SIZE)) {
fail("secretmem content mismatch");
return 1;
}

secret_fini(secretmem, SIZE);

pass();

return 0;
}
1 change: 1 addition & 0 deletions test/zdtm/static/memfd-secret00.desc
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@@ -0,0 +1 @@
{'feature': 'memfd_secret', 'flags': 'noauto'}

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