uverbs_cmd.c

/*
 * Copyright (c) 2005 Topspin Communications.  All rights reserved.
 * Copyright (c) 2005, 2006, 2007 Cisco Systems.  All rights reserved.
 * Copyright (c) 2005 PathScale, Inc.  All rights reserved.
 * Copyright (c) 2006 Mellanox Technologies.  All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     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.
 *
 * 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 <linux/file.h>
#include <linux/fs.h>
#include <linux/slab.h>
#include <linux/sched.h>

#include <linux/uaccess.h>

#include <rdma/uverbs_types.h>
#include <rdma/uverbs_std_types.h>
#include "rdma_core.h"

#include "uverbs.h"
#include "core_priv.h"

static struct ib_uverbs_completion_event_file *
ib_uverbs_lookup_comp_file(int fd, struct ib_ucontext *context)
{
	struct ib_uobject *uobj = uobj_get_read(UVERBS_OBJECT_COMP_CHANNEL,
						fd, context);
	struct ib_uobject_file *uobj_file;

	if (IS_ERR(uobj))
		return (void *)uobj;

	uverbs_uobject_get(uobj);
	uobj_put_read(uobj);

	uobj_file = container_of(uobj, struct ib_uobject_file, uobj);
	return container_of(uobj_file, struct ib_uverbs_completion_event_file,
			    uobj_file);
}

ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
			      struct ib_device *ib_dev,
			      const char __user *buf,