// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* Copyright (c) 2018, Mellanox Technologies inc. 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 "rdma_core.h"
#include "uverbs.h"
#include <rdma/uverbs_std_types.h>
static int uverbs_free_counters(struct ib_uobject *uobject,
enum rdma_remove_reason why,
struct uverbs_attr_bundle *attrs)
{
struct ib_counters *counters = uobject->object;
int ret;
if (atomic_read(&counters->usecnt))
return -EBUSY;
ret = counters->device->ops.destroy_counters(counters);
if (ret)
return ret;
kfree(counters);
return 0;
}
static int UVERBS_HANDLER(UVERBS_METHOD_COUNTERS_CREATE)(
struct uverbs_attr_bundle *attrs)
{
struct ib_uobject *uobj = uverbs_attr_get_uobject(
attrs, UVERBS_ATTR_CREATE_COUNTERS_HANDLE);
struct ib_device *ib_dev = attrs->context->device;
struct ib_counters *counters;
int ret;
/*
* This check should be removed once the infrastructure
* have the ability to remove methods from parse tree once
* such condition is met.
*/
if (!ib_dev->ops.create_counters)
return -EOPNOTSUPP;
counters = rdma_zalloc_drv_obj(ib_dev, ib_counters);
if (!counters)
return -ENOMEM;
counters->device = ib_dev;
counters->uobject = uobj;
uobj->object = counters;
atomic_set(&counters->usecnt, 0);
ret = ib_dev->ops.create_counters(counters, attrs);
if (ret)
kfree(counters);
return ret;
}
static int UVERBS_HANDLER(UVERBS_METHOD_COUNTERS_READ)(
struct uverbs_attr_bundle *attrs)
{
struct ib_counters_read_attr read_attr = {};
const struct uverbs_attr *uattr;
struct ib_counters *counters =
uverbs_attr_get_obj(attrs, UVERBS_ATTR_READ_COUNTERS_HANDLE);
int ret;
if (!counters->device->ops.read_counters)
return -EOPNOTSUPP;
if (!atomic_read(&counters->usecnt))
return -EINVAL;
ret = uverbs_get_flags32(&read_attr.flags, attrs,
UVERBS_ATTR_READ_COUNTERS_FLAGS,
IB_UVERBS_READ_COUNTERS_PREFER_CACHED);
if (ret)
return ret;
uattr = uverbs_attr_get(attrs, UVERBS_ATTR_READ_COUNTERS_BUFF);
if (IS_ERR(uattr))
return PTR_ERR(uattr);
read_attr.ncounters = uattr->ptr_attr.len / sizeof(u64);
read_attr.counters_buff = uverbs_zalloc(
attrs, array_size(read_attr.ncounters, sizeof(u64)));
if (IS_ERR(read_attr.counters_buff))
return PTR_ERR(read_attr.counters_buff);
ret = counters->device->ops.read_counters(counters, &read_attr, attrs);
if (ret)
return ret;
return uverbs_copy_to(attrs, UVERBS_ATTR_READ_COUNTERS_BUFF,
read_attr.counters_buff,
read_attr.ncounters * sizeof(u64));
}
DECLARE_UVERBS_NAMED_METHOD(
UVERBS_METHOD_COUNTERS_CREATE,
UVERBS_ATTR_IDR(UVERBS_ATTR_CREATE_COUNTERS_HANDLE,
UVERBS_OBJECT_COUNTERS,
UVERBS_ACCESS_NEW,
UA_MANDATORY));
DECLARE_UVERBS_NAMED_METHOD_DESTROY(
UVERBS_METHOD_COUNTERS_DESTROY,
UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_COUNTERS_HANDLE,
UVERBS_OBJECT_COUNTERS,
UVERBS_ACCESS_DESTROY,
UA_MANDATORY));
DECLARE_UVERBS_NAMED_METHOD(
UVERBS_METHOD_COUNTERS_READ,
UVERBS_ATTR_IDR(UVERBS_ATTR_READ_COUNTERS_HANDLE,
UVERBS_OBJECT_COUNTERS,
UVERBS_ACCESS_READ,
UA_MANDATORY),
UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_READ_COUNTERS_BUFF,
UVERBS_ATTR_MIN_SIZE(0),
UA_MANDATORY),
UVERBS_ATTR_FLAGS_IN(UVERBS_ATTR_READ_COUNTERS_FLAGS,
enum ib_uverbs_read_counters_flags));
DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_COUNTERS,
UVERBS_TYPE_ALLOC_IDR(uverbs_free_counters),
&UVERBS_METHOD(UVERBS_METHOD_COUNTERS_CREATE),
&UVERBS_METHOD(UVERBS_METHOD_COUNTERS_DESTROY),
&UVERBS_METHOD(UVERBS_METHOD_COUNTERS_READ));
const struct uapi_definition uverbs_def_obj_counters[] = {
UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_COUNTERS,
UAPI_DEF_OBJ_NEEDS_FN(destroy_counters)),
{}
};
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