/*
 * Copyright (c) 2019, NVIDIA CORPORATION.  All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

#include <nvgpu/bug.h>
#include <nvgpu/log.h>

#include <nvgpu/posix/file_ops.h>
#ifdef NVGPU_UNITTEST_FAULT_INJECTION_ENABLEMENT
#include <nvgpu/posix/posix-fault-injection.h>
#endif


#ifdef NVGPU_UNITTEST_FAULT_INJECTION_ENABLEMENT
struct nvgpu_posix_fault_inj *nvgpu_file_ops_get_fstat_injection(void)
{
	struct nvgpu_posix_fault_inj_container *c =
			nvgpu_posix_fault_injection_get_container();

	return &c->fstat_op;
}

struct nvgpu_posix_fault_inj *nvgpu_file_ops_get_fread_injection(void)
{
	struct nvgpu_posix_fault_inj_container *c =
			nvgpu_posix_fault_injection_get_container();

	return &c->fread_op;
}
#endif

int nvgpu_fstat(int fd, struct stat *buf)
{
#ifdef NVGPU_UNITTEST_FAULT_INJECTION_ENABLEMENT
	if (nvgpu_posix_fault_injection_handle_call(
					nvgpu_file_ops_get_fstat_injection())) {
		return -1;
	}
#endif
	return fstat(fd, buf);
}

ssize_t nvgpu_fread(int fildes, void* buf, size_t nbytes)
{
#ifdef NVGPU_UNITTEST_FAULT_INJECTION_ENABLEMENT
	if (nvgpu_posix_fault_injection_handle_call(
					nvgpu_file_ops_get_fread_injection())) {
		errno = -1;
		return -1;
	}
#endif
	return read(fildes, buf, nbytes);
}

void nvgpu_close(int fd)
{
	int ret;
	ret = close(fd);
	if (ret != 0) {
		nvgpu_err(NULL, "close() failed %d", ret);
	}
}