klnet_drv.h

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/* -*- C -*- */
/*
 * Copyright (c) 2012-2020 Seagate Technology LLC and/or its Affiliates
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * For any questions about this software or licensing,
 * please email opensource@seagate.com or cortx-questions@seagate.com.
 *
 */


#pragma once

#ifndef __MOTR_NET_LNET_KLNET_DRV_H__
#define __MOTR_NET_LNET_KLNET_DRV_H__

#include <linux/version.h>

#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,9,0)
#define WRITABLE_USER_PAGE_GET(uaddr, pg)                                   \
        get_user_pages((unsigned long) (uaddr), 1, FOLL_WRITE, &(pg), NULL)
#else
#define WRITABLE_USER_PAGE_GET(uaddr, pg)                                   \
        get_user_pages(current, current->mm, (unsigned long) (uaddr),       \
                       1, 1, 0, &(pg), NULL)
#endif

#define WRITABLE_USER_PAGE_PUT(pg)              \
({                                              \
        struct page *__pg = (pg);               \
        if (!PageReserved(__pg))                \
                SetPageDirty(__pg);             \
        put_page(__pg);                         \
})

M0_INTERNAL int nlx_dev_init(void);
M0_INTERNAL void nlx_dev_fini(void);
 /* LNetDev */

#endif /*  __MOTR_NET_LNET_KLNET_DRV_H__ */

/*
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 *  c-indentation-style: "K&R"
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 */