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/*
* Copyright (c) 2020 Nutanix Inc. All rights reserved.
*
* Authors: Thanos Makatos <thanos@nutanix.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Nutanix nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
*/
#include <dlfcn.h>
#include <setjmp.h>
#include <stdarg.h>
#include <stddef.h>
#include <string.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <cmocka.h>
#include "dma.h"
#include "migration.h"
#include "mocks.h"
#include "private.h"
#include "tran_sock.h"
struct function
{
const char *name;
bool patched;
};
static int (*__real_close)(int);
static struct function funcs[] = {
/* mocked internal funcs */
{ .name = "cmd_allowed_when_stopped_and_copying" },
{ .name = "device_is_stopped_and_copying" },
{ .name = "device_is_stopped" },
{ .name = "dma_controller_add_region" },
{ .name = "dma_controller_remove_region" },
{ .name = "dma_controller_unmap_region" },
{ .name = "exec_command" },
{ .name = "get_request_header" },
{ .name = "handle_dirty_pages" },
{ .name = "process_request" },
{ .name = "should_exec_command" },
{ .name = "tran_sock_send_iovec" },
/* system libs */
{ .name = "bind" },
{ .name = "close" },
{ .name = "listen" },
};
static struct function *
find(const char *name)
{
size_t i;
for (i = 0; i < ARRAY_SIZE(funcs); i++) {
if (strcmp(name, funcs[i].name) == 0) {
return &funcs[i];
}
}
assert(false);
}
void
patch(const char *name)
{
struct function *func = find(name);
func->patched = true;
}
static bool
is_patched(const char *name)
{
return find(name)->patched;
}
void
unpatch_all(void)
{
size_t i;
for (i = 0; i < ARRAY_SIZE(funcs); i++) {
funcs[i].patched = false;
}
}
int
dma_controller_add_region(dma_controller_t *dma, void *dma_addr,
size_t size, int fd, off_t offset,
uint32_t prot)
{
if (!is_patched("dma_controller_add_region")) {
return __real_dma_controller_add_region(dma, dma_addr, size, fd, offset,
prot);
}
check_expected_ptr(dma);
check_expected(dma_addr);
check_expected(size);
check_expected(fd);
check_expected(offset);
check_expected(prot);
errno = mock();
return mock();
}
int
dma_controller_remove_region(dma_controller_t *dma,
void *dma_addr, size_t size,
vfu_dma_unregister_cb_t *dma_unregister,
void *data)
{
if (!is_patched("dma_controller_remove_region")) {
return __real_dma_controller_remove_region(dma, dma_addr, size,
dma_unregister, data);
}
check_expected(dma);
check_expected(dma_addr);
check_expected(size);
check_expected(dma_unregister);
check_expected(data);
return mock();
}
void
dma_controller_unmap_region(dma_controller_t *dma,
dma_memory_region_t *region)
{
check_expected(dma);
check_expected(region);
}
int
tran_sock_send_iovec(int sock, uint16_t msg_id, bool is_reply,
enum vfio_user_command cmd,
struct iovec *iovecs, size_t nr_iovecs,
int *fds, int count, int err)
{
check_expected(sock);
check_expected(msg_id);
check_expected(is_reply);
check_expected(cmd);
check_expected(iovecs);
check_expected(nr_iovecs);
check_expected(fds);
check_expected(count);
check_expected(err);
return mock();
}
bool
device_is_stopped(struct migration *migration)
{
if (!is_patched("device_is_stopped")) {
return __real_device_is_stopped(migration);
}
check_expected(migration);
return mock();
}
int
get_request_header(vfu_ctx_t *vfu_ctx, vfu_msg_t **msgp)
{
check_expected(vfu_ctx);
check_expected(msgp);
return mock();
}
int
exec_command(vfu_ctx_t *vfu_ctx, vfu_msg_t *msg)
{
if (!is_patched("exec_command")) {
return __real_exec_command(vfu_ctx, msg);
}
check_expected(vfu_ctx);
check_expected(msg);
errno = mock();
return mock();
}
int
process_request(vfu_ctx_t *vfu_ctx)
{
if (!is_patched("process_request")) {
return __real_process_request(vfu_ctx);
}
check_expected(vfu_ctx);
return mock();
}
bool
device_is_stopped_and_copying(struct migration *migration)
{
if (!is_patched("device_is_stopped_and_copying")) {
return __real_device_is_stopped_and_copying(migration);
}
check_expected(migration);
return mock();
}
bool
cmd_allowed_when_stopped_and_copying(uint16_t cmd)
{
if (!is_patched("cmd_allowed_when_stopped_and_copying")) {
return __real_cmd_allowed_when_stopped_and_copying(cmd);
}
check_expected(cmd);
return mock();
}
bool
should_exec_command(vfu_ctx_t *vfu_ctx, uint16_t cmd)
{
if (!is_patched("should_exec_command")) {
return __real_should_exec_command(vfu_ctx, cmd);
}
check_expected(vfu_ctx);
check_expected(cmd);
return mock();
}
int
handle_dirty_pages(vfu_ctx_t *vfu_ctx, vfu_msg_t *msg)
{
if (!is_patched("handle_dirty_pages")) {
return __real_handle_dirty_pages(vfu_ctx, msg);
}
check_expected(vfu_ctx);
check_expected(msg);
errno = mock();
return mock();
}
/* Always mocked. */
void
mock_dma_register(vfu_ctx_t *vfu_ctx, vfu_dma_info_t *info)
{
check_expected(vfu_ctx);
check_expected(info);
}
int
mock_dma_unregister(vfu_ctx_t *vfu_ctx, vfu_dma_info_t *info)
{
check_expected(vfu_ctx);
check_expected(info);
return mock();
}
/* System-provided funcs. */
int
bind(int sockfd UNUSED, const struct sockaddr *addr UNUSED,
socklen_t addrlen UNUSED)
{
return 0;
}
int
close(int fd)
{
if (!is_patched("close")) {
if (__real_close == NULL) {
__real_close = dlsym(RTLD_NEXT, "close");
}
return __real_close(fd);
}
check_expected(fd);
return mock();
}
int
listen(int sockfd UNUSED, int backlog UNUSED)
{
return 0;
}
/* ex: set tabstop=4 shiftwidth=4 softtabstop=4 expandtab: */
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