From patchwork Tue Aug 9 16:39:31 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matan Barak X-Patchwork-Id: 9271777 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 81D9060754 for ; Tue, 9 Aug 2016 16:40:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 728C82833F for ; Tue, 9 Aug 2016 16:40:50 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6773F28383; Tue, 9 Aug 2016 16:40:50 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2F1C22833F for ; Tue, 9 Aug 2016 16:40:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752597AbcHIQkr (ORCPT ); Tue, 9 Aug 2016 12:40:47 -0400 Received: from mail-il-dmz.mellanox.com ([193.47.165.129]:39976 "EHLO mellanox.co.il" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752569AbcHIQkk (ORCPT ); Tue, 9 Aug 2016 12:40:40 -0400 Received: from Internal Mail-Server by MTLPINE1 (envelope-from matanb@mellanox.com) with ESMTPS (AES256-SHA encrypted); 9 Aug 2016 19:40:35 +0300 Received: from rsws33.mtr.labs.mlnx (dev-r-vrt-064.mtr.labs.mlnx [10.212.64.1]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id u79GeZtw000869; Tue, 9 Aug 2016 19:40:35 +0300 From: Matan Barak To: linux-rdma@vger.kernel.org Cc: Doug Ledford , Jason Gunthorpe , Sean Hefty , Tal Alon , Liran Liss , Haggai Eran , Matan Barak , Majd Dibbiny , Christoph Lameter , Leon Romanovsky Subject: [RFC ABI V3 3/7] RDMA/core: Add support for custom types Date: Tue, 9 Aug 2016 19:39:31 +0300 Message-Id: <1470760775-6813-4-git-send-email-matanb@mellanox.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1470760775-6813-1-git-send-email-matanb@mellanox.com> References: <1470760775-6813-1-git-send-email-matanb@mellanox.com> Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The new ioctl infrastructure supports driver specific objects. Each such object type has a free function, allocation size and an order of destruction. This information is embedded in the same table describing the various action allowed on the object, similarly to object oriented programming. When a ucontext is created, a new list is created in this ib_ucontext. This list contains all objects created under this ib_ucontext. When a ib_ucontext is destroyed, we traverse this list several time destroying the various objects by the order mentioned in the object type description. If few object types have the same destruction order, they are destroyed in an order opposite to their creation order. Adding an object is done in two parts. First, an object is allocated and added to IDR. Then, the command's handlers (in downstream patches) could work on this object and fill in its required details. After a successful command, ib_uverbs_uobject_enable is called and this user objects becomes ucontext visible. Removing an uboject is done by calling ib_uverbs_uobject_remove. We should make sure IDR (per-device) and list (per-ucontext) could be accessed concurrently without corrupting them. Signed-off-by: Matan Barak Signed-off-by: Haggai Eran Signed-off-by: Leon Romanovsky --- drivers/infiniband/core/Makefile | 3 +- drivers/infiniband/core/device.c | 1 + drivers/infiniband/core/rdma_core.c | 315 ++++++++++++++++++++++++++++++++++++ drivers/infiniband/core/rdma_core.h | 70 ++++++++ include/rdma/ib_verbs.h | 22 ++- include/rdma/uverbs_ioctl.h | 183 +++++++++++++++++++++ 6 files changed, 591 insertions(+), 3 deletions(-) create mode 100644 drivers/infiniband/core/rdma_core.c create mode 100644 drivers/infiniband/core/rdma_core.h create mode 100644 include/rdma/uverbs_ioctl.h diff --git a/drivers/infiniband/core/Makefile b/drivers/infiniband/core/Makefile index edaae9f..1819623 100644 --- a/drivers/infiniband/core/Makefile +++ b/drivers/infiniband/core/Makefile @@ -28,4 +28,5 @@ ib_umad-y := user_mad.o ib_ucm-y := ucm.o -ib_uverbs-y := uverbs_main.o uverbs_cmd.o uverbs_marshall.o +ib_uverbs-y := uverbs_main.o uverbs_cmd.o uverbs_marshall.o \ + rdma_core.o diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c index b0135c2..5f09c40 100644 --- a/drivers/infiniband/core/device.c +++ b/drivers/infiniband/core/device.c @@ -243,6 +243,7 @@ struct ib_device *ib_alloc_device(size_t size) spin_lock_init(&device->client_data_lock); INIT_LIST_HEAD(&device->client_data_list); INIT_LIST_HEAD(&device->port_list); + INIT_LIST_HEAD(&device->type_list); return device; } diff --git a/drivers/infiniband/core/rdma_core.c b/drivers/infiniband/core/rdma_core.c new file mode 100644 index 0000000..e043e2f --- /dev/null +++ b/drivers/infiniband/core/rdma_core.c @@ -0,0 +1,315 @@ +/* + * Copyright (c) 2016, 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 +#include "uverbs.h" +#include "rdma_core.h" +#include + +const struct uverbs_type *uverbs_get_type(const struct ib_device *ibdev, + uint16_t type) +{ + const struct uverbs_types_group *groups = ibdev->types_group; + const struct uverbs_types *types; + int ret = groups->dist(&type, groups->priv); + + if (ret >= groups->num_groups) + return NULL; + + types = groups->type_groups[ret]; + + if (type >= types->num_types) + return NULL; + + return types->types[type]; +} + +static int uverbs_lock_object(struct ib_uobject *uobj, + enum uverbs_idr_access access) +{ + if (access == UVERBS_IDR_ACCESS_READ) + return down_read_trylock(&uobj->usecnt) == 1 ? 0 : -EBUSY; + + /* lock is either WRITE or DESTROY - should be exclusive */ + return down_write_trylock(&uobj->usecnt) == 1 ? 0 : -EBUSY; +} + +static struct ib_uobject *get_uobj(int id, struct ib_ucontext *context) +{ + struct ib_uobject *uobj; + + rcu_read_lock(); + uobj = idr_find(&context->device->idr, id); + if (uobj && uobj->live) { + if (uobj->context != context) + uobj = NULL; + } + rcu_read_unlock(); + + return uobj; +} + +static void init_uobj(struct ib_uobject *uobj, u64 user_handle, + struct ib_ucontext *context) +{ + init_rwsem(&uobj->usecnt); + uobj->user_handle = user_handle; + uobj->context = context; + uobj->live = 0; +} + +static int add_uobj(struct ib_uobject *uobj) +{ + int ret; + + idr_preload(GFP_KERNEL); + spin_lock(&uobj->context->device->idr_lock); + + ret = idr_alloc(&uobj->context->device->idr, uobj, 0, 0, GFP_NOWAIT); + if (ret >= 0) + uobj->id = ret; + + spin_unlock(&uobj->context->device->idr_lock); + idr_preload_end(); + + return ret < 0 ? ret : 0; +} + +static void remove_uobj(struct ib_uobject *uobj) +{ + spin_lock(&uobj->context->device->idr_lock); + idr_remove(&uobj->context->device->idr, uobj->id); + spin_unlock(&uobj->context->device->idr_lock); +} + +static void put_uobj(struct ib_uobject *uobj) +{ + kfree_rcu(uobj, rcu); +} + +static struct ib_uobject *get_uobject_from_context(struct ib_ucontext *ucontext, + const struct uverbs_type_alloc_action *type, + u32 idr, + enum uverbs_idr_access access) +{ + struct ib_uobject *uobj; + int ret; + + rcu_read_lock(); + uobj = get_uobj(idr, ucontext); + if (!uobj) + goto free; + + if (uobj->type != type) { + uobj = NULL; + goto free; + } + + ret = uverbs_lock_object(uobj, access); + if (ret) + uobj = ERR_PTR(ret); +free: + rcu_read_unlock(); + return uobj; + + return NULL; +} + +struct ib_uobject *uverbs_get_type_from_idr(const struct uverbs_type_alloc_action *type, + struct ib_ucontext *ucontext, + enum uverbs_idr_access access, + uint32_t idr) +{ + struct ib_uobject *uobj; + int ret; + + if (access == UVERBS_IDR_ACCESS_NEW) { + uobj = kmalloc(type->obj_size, GFP_KERNEL); + if (!uobj) + return ERR_PTR(-ENOMEM); + + init_uobj(uobj, 0, ucontext); + + /* lock idr */ + ret = ib_uverbs_uobject_add(uobj, type); + if (ret) { + kfree(uobj); + return ERR_PTR(ret); + } + + } else { + uobj = get_uobject_from_context(ucontext, type, idr, + access); + + if (!uobj) + return ERR_PTR(-ENOENT); + } + + return uobj; +} + +void uverbs_unlock_object(struct ib_uobject *uobj, + enum uverbs_idr_access access, + bool success) +{ + switch (access) { + case UVERBS_IDR_ACCESS_READ: + up_read(&uobj->usecnt); + break; + case UVERBS_IDR_ACCESS_NEW: + if (success) { + ib_uverbs_uobject_enable(uobj); + } else { + remove_uobj(uobj); + put_uobj(uobj); + } + break; + case UVERBS_IDR_ACCESS_WRITE: + up_write(&uobj->usecnt); + break; + case UVERBS_IDR_ACCESS_DESTROY: + if (success) + ib_uverbs_uobject_remove(uobj); + else + up_write(&uobj->usecnt); + break; + } +} + +void uverbs_unlock_objects(struct uverbs_attr_array *attr_array, + size_t num, + const struct uverbs_action_spec *spec, + bool success) +{ + unsigned int i; + + for (i = 0; i < num; i++) { + struct uverbs_attr_array *attr_spec_array = &attr_array[i]; + const struct uverbs_attr_group_spec *group_spec = + spec->attr_groups[i]; + unsigned int j; + + for (j = 0; j < attr_spec_array->num_attrs; j++) { + struct uverbs_attr *attr = &attr_spec_array->attrs[j]; + struct uverbs_attr_spec *spec = &group_spec->attrs[j]; + + if (spec->type != UVERBS_ATTR_TYPE_IDR || !attr->valid) + continue; + + /* + * refcounts should be handled at the object level and + * not at the uobject level. + */ + uverbs_unlock_object(attr->obj_attr.uobject, + spec->idr.access, success); + } + } +} + +static unsigned int get_type_orders(const struct uverbs_types_group *types_group) +{ + unsigned int i; + unsigned int max = 0; + + for (i = 0; i < types_group->num_groups; i++) { + unsigned int j; + const struct uverbs_types *types = types_group->type_groups[i]; + + for (j = 0; j < types->num_types; j++) { + if (!types->types[j] || !types->types[j]->alloc) + continue; + if (types->types[j]->alloc->order > max) + max = types->types[j]->alloc->order; + } + } + + return max; +} + +void ib_uverbs_uobject_type_cleanup_ucontext(struct ib_ucontext *ucontext, + const struct uverbs_types_group *types_group) +{ + unsigned int num_orders = get_type_orders(types_group); + unsigned int i; + + for (i = 0; i <= num_orders; i++) { + struct ib_uobject *obj, *next_obj; + + /* + * No need to take lock here, as cleanup should be called + * after all commands finished executing. Newly executed + * commands should fail. + */ + list_for_each_entry_safe(obj, next_obj, &ucontext->uobjects, + list) + if (obj->type->order == i) { + pr_info("deallocating object %p\n", obj); + ib_uverbs_uobject_remove(obj); + } + } +} + +void ib_uverbs_uobject_type_initialize_ucontext(struct ib_ucontext *ucontext) +{ + INIT_LIST_HEAD(&ucontext->uobjects); + mutex_init(&ucontext->uobjects_lock); +} + +int ib_uverbs_uobject_add(struct ib_uobject *uobject, + const struct uverbs_type_alloc_action *uobject_type) +{ + uobject->type = uobject_type; + return add_uobj(uobject); +} + +void ib_uverbs_uobject_enable(struct ib_uobject *uobject) +{ + mutex_lock(&uobject->context->uobjects_lock); + list_add(&uobject->list, &uobject->context->uobjects); + mutex_unlock(&uobject->context->uobjects_lock); + uobject->live = 1; +} + +void ib_uverbs_uobject_remove(struct ib_uobject *uobject) +{ + /* + * Calling remove requires exclusive access, so it's not possible + * another thread will use our object. + */ + uobject->live = 0; + uobject->type->free_fn(uobject->type, uobject); + mutex_lock(&uobject->context->uobjects_lock); + list_del(&uobject->list); + mutex_unlock(&uobject->context->uobjects_lock); + remove_uobj(uobject); + put_uobj(uobject); +} diff --git a/drivers/infiniband/core/rdma_core.h b/drivers/infiniband/core/rdma_core.h new file mode 100644 index 0000000..17820db --- /dev/null +++ b/drivers/infiniband/core/rdma_core.h @@ -0,0 +1,70 @@ +/* + * Copyright (c) 2005 Topspin Communications. All rights reserved. + * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved. + * Copyright (c) 2005-2016 Mellanox Technologies. All rights reserved. + * Copyright (c) 2005 Voltaire, Inc. All rights reserved. + * Copyright (c) 2005 PathScale, 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. + */ + +#ifndef UOBJECT_H +#define UOBJECT_H + +#include +#include +#include +#include + +const struct uverbs_type *uverbs_get_type(const struct ib_device *ibdev, + uint16_t type); +struct ib_uobject *uverbs_get_type_from_idr(const struct uverbs_type_alloc_action *type, + struct ib_ucontext *ucontext, + enum uverbs_idr_access access, + uint32_t idr); +void ib_uverbs_uobject_remove(struct ib_uobject *uobject); +void ib_uverbs_uobject_enable(struct ib_uobject *uobject); +void uverbs_unlock_object(struct ib_uobject *uobj, + enum uverbs_idr_access access, + bool success); +void uverbs_unlock_objects(struct uverbs_attr_array *attr_array, + size_t num, + const struct uverbs_action_spec *spec, + bool success); + +void ib_uverbs_uobject_type_cleanup_ucontext(struct ib_ucontext *ucontext, + const struct uverbs_types_group *types_group); +void ib_uverbs_uobject_type_initialize_ucontext(struct ib_ucontext *ucontext); + +int ib_uverbs_uobject_add(struct ib_uobject *uobject, + const struct uverbs_type_alloc_action *uobject_type); +void ib_uverbs_uobject_remove(struct ib_uobject *uobject); +void ib_uverbs_uobject_enable(struct ib_uobject *uobject); + +#endif /* UIDR_H */ diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 14bfe3b..8a3e5de 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -1325,6 +1325,10 @@ struct ib_ucontext { struct list_head rule_list; int closing; + /* lock for uobjects list */ + struct mutex uobjects_lock; + struct list_head uobjects; + struct pid *tgid; #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING struct rb_root umem_tree; @@ -1344,16 +1348,27 @@ struct ib_ucontext { #endif }; +struct uverbs_object_list; + +#define OLD_ABI_COMPAT + struct ib_uobject { u64 user_handle; /* handle given to us by userspace */ struct ib_ucontext *context; /* associated user context */ void *object; /* containing object */ struct list_head list; /* link to context's list */ int id; /* index into kernel idr */ - struct kref ref; - struct rw_semaphore mutex; /* protects .live */ +#ifdef OLD_ABI_COMPAT + struct kref ref; +#endif + struct rw_semaphore usecnt; /* protects exclusive accesses */ +#ifdef OLD_ABI_COMPAT + struct rw_semaphore mutex; /* protects .live */ +#endif struct rcu_head rcu; /* kfree_rcu() overhead */ int live; + + const struct uverbs_type_alloc_action *type; }; struct ib_udata { @@ -1960,6 +1975,9 @@ struct ib_device { * in fast paths. */ int (*get_port_immutable)(struct ib_device *, u8, struct ib_port_immutable *); + struct list_head type_list; + + const struct uverbs_types_group *types_group; }; struct ib_client { diff --git a/include/rdma/uverbs_ioctl.h b/include/rdma/uverbs_ioctl.h new file mode 100644 index 0000000..f2e207b --- /dev/null +++ b/include/rdma/uverbs_ioctl.h @@ -0,0 +1,183 @@ +/* + * Copyright (c) 2016, 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. + */ + +#ifndef _UVERBS_IOCTL_ +#define _UVERBS_IOCTL_ + +#include + +struct uverbs_object_type; +struct ib_ucontext; +struct ib_uobject; +struct ib_device; +struct uverbs_uobject_type; + +/* + * ======================================= + * Verbs action specifications + * ======================================= + */ + +enum uverbs_attr_type { + UVERBS_ATTR_TYPE_PTR_IN, + UVERBS_ATTR_TYPE_PTR_OUT, + UVERBS_ATTR_TYPE_IDR, + /* + * TODO: we could add FD type for command which will migrate the events + * to a specific FD. + */ +}; + +enum uverbs_idr_access { + UVERBS_IDR_ACCESS_READ, + UVERBS_IDR_ACCESS_WRITE, + UVERBS_IDR_ACCESS_NEW, + UVERBS_IDR_ACCESS_DESTROY +}; + +struct uverbs_attr_spec { + u16 len; + enum uverbs_attr_type type; + struct { + u16 new_size; + u16 idr_type; + u8 access; + } idr; + /* TODO: In case of FD, we could validate here the fops pointer */ +}; + +struct uverbs_attr_group_spec { + struct uverbs_attr_spec *attrs; + size_t num_attrs; +}; + +struct uverbs_action_spec { + const struct uverbs_attr_group_spec **attr_groups; + /* if > 0 -> validator, otherwise, error */ + int (*dist)(__u16 *attr_id, void *priv); + void *priv; + size_t num_groups; +}; + +struct uverbs_attr_array; +struct ib_uverbs_file; + +struct uverbs_action { + struct uverbs_action_spec spec; + void *priv; + int (*handler)(struct ib_device *ib_dev, struct ib_uverbs_file *ufile, + struct uverbs_attr_array *ctx, size_t num, void *priv); +}; + +struct uverbs_type_alloc_action; +typedef void (*free_type)(const struct uverbs_type_alloc_action *uobject_type, + struct ib_uobject *uobject); + +struct uverbs_type_alloc_action { + free_type free_fn; + int order; + size_t obj_size; +}; + +struct uverbs_type_actions_group { + size_t num_actions; + const struct uverbs_action **actions; +}; + +struct uverbs_type { + size_t num_groups; + const struct uverbs_type_actions_group **action_groups; + const struct uverbs_type_alloc_action *alloc; + int (*dist)(__u16 *action_id, void *priv); + void *priv; +}; + +struct uverbs_types { + size_t num_types; + const struct uverbs_type **types; +}; + +struct uverbs_types_group { + const struct uverbs_types **type_groups; + size_t num_groups; + int (*dist)(__u16 *type_id, void *priv); + void *priv; +}; + +/* ================================================= + * Parsing infrastructure + * ================================================= + */ + +struct uverbs_ptr_attr { + void * __user ptr; + __u16 len; +}; + +struct uverbs_obj_attr { + /* idr handle */ + __u32 idr; + /* pointer to the kernel descriptor -> type, access, etc */ + const struct uverbs_attr_spec *val; + struct ib_uobject *uobject; + struct ib_uverbs_attr __user *uattr; + const struct uverbs_type_alloc_action *type; +}; + +struct uverbs_attr { + bool valid; + union { + struct uverbs_ptr_attr cmd_attr; + struct uverbs_obj_attr obj_attr; + }; +}; + +/* output of one validator */ +struct uverbs_attr_array { + size_t num_attrs; + /* arrays of attrubytes, index is the id i.e SEND_CQ */ + struct uverbs_attr *attrs; +}; + +/* ================================================= + * Types infrastructure + * ================================================= + */ + +int ib_uverbs_uobject_type_add(struct list_head *head, + void (*free)(struct uverbs_uobject_type *uobject_type, + struct ib_uobject *uobject, + struct ib_ucontext *ucontext), + uint16_t obj_type); +void ib_uverbs_uobject_types_remove(struct ib_device *ib_dev); + +#endif