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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2023 Red Hat GmbH
* Author: Alice Frosi <afrosi@redhat.com>
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <limits.h>
#include <fcntl.h>
#include <unistd.h>
#include <sched.h>
#include <sys/wait.h>
#include <sys/syscall.h>
#include <sys/mman.h>
#include <check.h>
#include "common/gluten.h"
#include "operations.h"
#include "testutil.h"
struct args_write_file {
char *file;
char *t;
ssize_t size;
};
static long nr;
static void write_arg(struct op_call *call, int i, long v)
{
ck_write_gluten(gluten, call->args[i], v);
}
static void write_file(char *file, char *t, ssize_t size)
{
int fd;
fd = open(file, O_CREAT | O_RDWR, S_IWUSR | S_IRUSR);
ck_assert_int_ge(fd, -1);
write(fd, t, size);
close(fd);
}
static int write_file_get_fd(char *file, char *t, ssize_t size)
{
int fd;
write_file(file, t, size);
fd = open(file, O_RDONLY, S_IWUSR);
unlink(file);
return fd;
}
static int write_file_clone(void *a)
{
struct args_write_file *args = (struct args_write_file *)a;
write_file(args->file, args->t, args->size);
install_single_syscall(SYS_getpid);
getpid();
return 0;
}
static void set_ns_to_none(struct op_call *call)
{
for (unsigned int i = 0; i < NS_NUM; i++)
call->context.ns[i].type = NS_NONE;
}
static void setup_ns(struct args_write_file *args)
{
at = mmap(NULL, sizeof(struct args_target), PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_ANONYMOUS, -1, 0);
at->nr = __NR_getpid;
at->target = write_file_clone;
at->tclone = (void *)args;
at->ns[NS_MOUNT] = true;
setup();
}
START_TEST(test_with_read)
{
char test_file[] = "/tmp/test.txt";
char t[PATH_MAX] = "Hello Test";
struct op_call call = {
{ OFFSET_RO_DATA, 0 },
{
{ OFFSET_DATA, 0 },
{ OFFSET_DATA, sizeof(long) },
{ OFFSET_DATA, sizeof(long) * 2 },
},
.has_ret = true,
.ret = { OFFSET_DATA, sizeof(long) * 3 },
};
char buf[PATH_MAX];
long count, ret;
int fd;
fd = write_file_get_fd(test_file, t, sizeof(t));
count = sizeof(buf);
for (unsigned int i = 0; i < NS_NUM; i++)
call.context.ns[i].type = NS_NONE;
nr = SYS_read;
ck_write_gluten(gluten, call.nr, nr);
write_arg(&call, 0, (long)fd);
write_arg(&call, 1, (long)&buf);
write_arg(&call, 2, (long)count);
nr = SYS_read;
ck_assert_int_eq(op_call(&req, notifyfd, &gluten, &call), 0);
ck_read_gluten(gluten, call.ret, ret);
ck_assert_msg(ret == count, "expect ret %ld to be %ld", ret, count);
ck_assert_str_eq(t, buf);
}
END_TEST
START_TEST(test_with_getppid)
{
struct op_call call = {
.nr = { OFFSET_RO_DATA, 0 },
.has_ret = true,
.ret = { OFFSET_DATA, 0 },
};
long pid = (long)getpid();
int ret = -1;
for (unsigned int i = 0; i < NS_NUM; i++)
call.context.ns[i].type = NS_NONE;
nr = SYS_getppid;
ck_write_gluten(gluten, call.nr, nr);
ck_assert_int_eq(op_call(&req, notifyfd, &gluten, &call), 0);
ck_read_gluten(gluten, call.ret, ret);
ck_assert_msg(ret == pid, "expect ret %d to be equal to %ld", ret, pid);
}
END_TEST
START_TEST(test_with_open_read_ns)
{
char test_file[] = "/tmp/test.txt";
char t[PATH_MAX] = "Hello Test";
struct args_write_file args = { test_file, t, sizeof(t) };
struct op_call *call;
struct op ops[] = {
{ OP_CALL,
{ .call = { { OFFSET_RO_DATA, 0 }, /* open */
{
{ OFFSET_DATA, 0 },
{ OFFSET_DATA, sizeof(long) },
{ OFFSET_DATA, sizeof(long) * 2 },
},
.has_ret = true,
.ret = { OFFSET_DATA, sizeof(long) * 3 } } } },
{ OP_CALL,
{ .call = { { OFFSET_RO_DATA, sizeof(long) }, /* read */
{
{ OFFSET_DATA, sizeof(long) * 3 }, /* ret of the previous call*/
{ OFFSET_DATA, sizeof(long) * 5 },
{ OFFSET_DATA, sizeof(long) * 6 },
},
.has_ret = true,
.ret = { OFFSET_DATA, sizeof(long) * 7 } } } },
{ OP_END, OP_EMPTY },
};
int flags = O_RDWR;
char buf[PATH_MAX];
long count, rcount;
setup_ns(&args);
/* Copy and configure op_calls */
set_ns_to_none(&ops[0].op.call);
set_ns_to_none(&ops[1].op.call);
nr = SYS_open;
call = &ops[0].op.call;
ck_write_gluten(gluten, call->nr, nr);
write_arg(call, 0, (long)&test_file);
write_arg(call, 1, (long)flags);
call->context.ns[NS_MOUNT].type = NS_SPEC_TARGET;
nr = SYS_read;
call = &ops[1].op.call;
count = sizeof(buf);
ck_write_gluten(gluten, call->nr, nr);
write_arg(call, 1, (long)&buf);
write_arg(call, 2, (long)count);
call->context.ns[NS_MOUNT].type = NS_SPEC_TARGET;
write_instr(gluten, ops);
ck_assert_int_eq(eval(&gluten, &req, notifyfd), 0);
ck_read_gluten(gluten, ops[1].op.call.ret, rcount);
ck_assert_msg(rcount == count, "expect ret %ld to be %ld", rcount, count);
ck_assert_str_eq(t, buf);
}
END_TEST
Suite *op_call_suite(void)
{
Suite *s;
TCase *tsimple, *tread, *treadns;
int timeout = 30;
s = suite_create("Perform ops call");
tsimple = tcase_create("getppid");
tcase_add_test(tsimple, test_with_getppid);
suite_add_tcase(s, tsimple);
tread = tcase_create("read");
tcase_add_test(tread, test_with_read);
suite_add_tcase(s, tread);
treadns = tcase_create("read ns");
tcase_add_checked_fixture(treadns, NULL, teardown);
tcase_set_timeout(treadns, timeout);
tcase_add_test(treadns, test_with_open_read_ns);
suite_add_tcase(s, treadns);
return s;
}
int main(void)
{
int no_failed = 0;
Suite *s;
SRunner *runner;
s = op_call_suite();
runner = srunner_create(s);
srunner_run_all(runner, CK_VERBOSE);
no_failed = srunner_ntests_failed(runner);
srunner_free(runner);
return (no_failed == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
}
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