158 lines
5.0 KiB
C
158 lines
5.0 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
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/*
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* Copyright (c) 2018, Mellanox Technologies inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "uverbs.h"
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#include <rdma/uverbs_std_types.h>
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static int uverbs_free_counters(struct ib_uobject *uobject,
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enum rdma_remove_reason why)
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{
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struct ib_counters *counters = uobject->object;
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if (why == RDMA_REMOVE_DESTROY &&
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atomic_read(&counters->usecnt))
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return -EBUSY;
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return counters->device->destroy_counters(counters);
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}
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static int UVERBS_HANDLER(UVERBS_METHOD_COUNTERS_CREATE)(struct ib_device *ib_dev,
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struct ib_uverbs_file *file,
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struct uverbs_attr_bundle *attrs)
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{
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struct ib_counters *counters;
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struct ib_uobject *uobj;
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int ret;
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/*
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* This check should be removed once the infrastructure
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* have the ability to remove methods from parse tree once
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* such condition is met.
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*/
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if (!ib_dev->create_counters)
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return -EOPNOTSUPP;
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uobj = uverbs_attr_get_uobject(attrs, UVERBS_ATTR_CREATE_COUNTERS_HANDLE);
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counters = ib_dev->create_counters(ib_dev, attrs);
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if (IS_ERR(counters)) {
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ret = PTR_ERR(counters);
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goto err_create_counters;
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}
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counters->device = ib_dev;
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counters->uobject = uobj;
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uobj->object = counters;
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atomic_set(&counters->usecnt, 0);
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return 0;
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err_create_counters:
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return ret;
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}
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static int UVERBS_HANDLER(UVERBS_METHOD_COUNTERS_READ)(struct ib_device *ib_dev,
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struct ib_uverbs_file *file,
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struct uverbs_attr_bundle *attrs)
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{
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struct ib_counters_read_attr read_attr = {};
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const struct uverbs_attr *uattr;
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struct ib_counters *counters =
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uverbs_attr_get_obj(attrs, UVERBS_ATTR_READ_COUNTERS_HANDLE);
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int ret;
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if (!ib_dev->read_counters)
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return -EOPNOTSUPP;
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if (!atomic_read(&counters->usecnt))
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return -EINVAL;
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ret = uverbs_copy_from(&read_attr.flags, attrs,
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UVERBS_ATTR_READ_COUNTERS_FLAGS);
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if (ret)
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return ret;
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uattr = uverbs_attr_get(attrs, UVERBS_ATTR_READ_COUNTERS_BUFF);
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read_attr.ncounters = uattr->ptr_attr.len / sizeof(u64);
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read_attr.counters_buff = kcalloc(read_attr.ncounters,
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sizeof(u64), GFP_KERNEL);
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if (!read_attr.counters_buff)
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return -ENOMEM;
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ret = ib_dev->read_counters(counters,
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&read_attr,
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attrs);
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if (ret)
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goto err_read;
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ret = uverbs_copy_to(attrs, UVERBS_ATTR_READ_COUNTERS_BUFF,
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read_attr.counters_buff,
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read_attr.ncounters * sizeof(u64));
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err_read:
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kfree(read_attr.counters_buff);
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return ret;
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}
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static DECLARE_UVERBS_NAMED_METHOD(UVERBS_METHOD_COUNTERS_CREATE,
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&UVERBS_ATTR_IDR(UVERBS_ATTR_CREATE_COUNTERS_HANDLE,
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UVERBS_OBJECT_COUNTERS,
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UVERBS_ACCESS_NEW,
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UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)));
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static DECLARE_UVERBS_NAMED_METHOD_WITH_HANDLER(UVERBS_METHOD_COUNTERS_DESTROY,
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uverbs_destroy_def_handler,
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&UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_COUNTERS_HANDLE,
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UVERBS_OBJECT_COUNTERS,
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UVERBS_ACCESS_DESTROY,
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UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)));
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#define MAX_COUNTERS_BUFF_SIZE USHRT_MAX
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static DECLARE_UVERBS_NAMED_METHOD(UVERBS_METHOD_COUNTERS_READ,
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&UVERBS_ATTR_IDR(UVERBS_ATTR_READ_COUNTERS_HANDLE,
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UVERBS_OBJECT_COUNTERS,
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UVERBS_ACCESS_READ,
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UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)),
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&UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_READ_COUNTERS_BUFF,
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UVERBS_ATTR_SIZE(0, MAX_COUNTERS_BUFF_SIZE),
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UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)),
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&UVERBS_ATTR_PTR_IN(UVERBS_ATTR_READ_COUNTERS_FLAGS,
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UVERBS_ATTR_TYPE(__u32),
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UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)));
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DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_COUNTERS,
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&UVERBS_TYPE_ALLOC_IDR(0, uverbs_free_counters),
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&UVERBS_METHOD(UVERBS_METHOD_COUNTERS_CREATE),
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&UVERBS_METHOD(UVERBS_METHOD_COUNTERS_DESTROY),
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&UVERBS_METHOD(UVERBS_METHOD_COUNTERS_READ));
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