From patchwork Wed Aug 28 09:15:33 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yuval Shaia X-Patchwork-Id: 11118385 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D0FE318B7 for ; Wed, 28 Aug 2019 09:16:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A67A12189D for ; Wed, 28 Aug 2019 09:16:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="XkfHuvfv" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726326AbfH1JQe (ORCPT ); Wed, 28 Aug 2019 05:16:34 -0400 Received: from aserp2120.oracle.com ([141.146.126.78]:55508 "EHLO aserp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726447AbfH1JQd (ORCPT ); Wed, 28 Aug 2019 05:16:33 -0400 Received: from pps.filterd (aserp2120.oracle.com [127.0.0.1]) by aserp2120.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x7S996PX020665; Wed, 28 Aug 2019 09:16:12 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=corp-2019-08-05; bh=viZ0rpJhtreNNatRCsPHwnK5It+ZresIydLMQiXle/U=; b=XkfHuvfvUQzAgfiFcQ/1cylZ+WBW9HfJ1Ii3excIGiIO8vxV2vI3CDDcEXLBT4rZaUQl HJQRZht/IfB0s6BQW13Expua+Nw6ypx0o2/MuBc3V5t/yP2h90Cp1sUFuR3IVyqST24n SHNvLrlNDY1sxNKEVNmx/lvd8uFBD+79Wb2Thrn+wWPxJZ5zdbAT6of+Qv/o/qQpubJp SIQNwsyEt1zdee2iTQ9Hd5J6OmKEuK98M0I5juQ4tfvPfwJ5Ha22vJOcCdT/+jVsPgDF +i/zmznosLv0aWDuD+VXQPvyw3YhK/9bvwlhpyPcaMdKYdLjhnBsJU8AC4Ilq/UTeGZ1 kg== Received: from aserp3020.oracle.com (aserp3020.oracle.com [141.146.126.70]) by aserp2120.oracle.com with ESMTP id 2unnbhgp3r-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 28 Aug 2019 09:16:12 +0000 Received: from pps.filterd (aserp3020.oracle.com [127.0.0.1]) by aserp3020.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x7S996EK184324; Wed, 28 Aug 2019 09:16:12 GMT Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by aserp3020.oracle.com with ESMTP id 2undw77qfr-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 28 Aug 2019 09:16:12 +0000 Received: from abhmp0003.oracle.com (abhmp0003.oracle.com [141.146.116.9]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id x7S9GBOO022549; Wed, 28 Aug 2019 09:16:11 GMT Received: from host5.lan (/77.138.183.59) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 28 Aug 2019 02:16:11 -0700 From: Yuval Shaia To: dledford@redhat.com, jgg@ziepe.ca, oulijun@huawei.com, xavier.huwei@huawei.com, leon@kernel.org, parav@mellanox.com, markz@mellanox.com, swise@opengridcomputing.com, galpress@amazon.com, israelr@mellanox.com, monis@mellanox.com, maxg@mellanox.com, kamalheib1@gmail.com, yuval.shaia@oracle.com, denisd@mellanox.com, yuvalav@mellanox.com, dennis.dalessandro@intel.com, ereza@mellanox.com, will@kernel.org, linux-rdma@vger.kernel.org, jgg@mellanox.com, srabinov7@gmail.com, santosh.shilimkar@oracle.com Cc: Shamir Rabinovitch Subject: [PATCH v1 5/5] RDMA/nldev: ib_pd can be pointed by multiple ib_ucontext Date: Wed, 28 Aug 2019 12:15:33 +0300 Message-Id: <20190828091533.3129-6-yuval.shaia@oracle.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190828091533.3129-1-yuval.shaia@oracle.com> References: <20190828091533.3129-1-yuval.shaia@oracle.com> MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9362 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1908280098 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9362 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1908280098 Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org From: Shamir Rabinovitch In shared object model ib_pd can belong to 1 or more ib_ucontext. Fix the nldev code so it could report multiple context ids. Signed-off-by: Shamir Rabinovitch Signed-off-by: Shamir Rabinovitch --- drivers/infiniband/core/nldev.c | 127 +++++++++++++++++++++++++++++-- include/uapi/rdma/rdma_netlink.h | 3 + 2 files changed, 125 insertions(+), 5 deletions(-) diff --git a/drivers/infiniband/core/nldev.c b/drivers/infiniband/core/nldev.c index e287b71a1cfd..7ad23a6607f7 100644 --- a/drivers/infiniband/core/nldev.c +++ b/drivers/infiniband/core/nldev.c @@ -41,6 +41,7 @@ #include "core_priv.h" #include "cma_priv.h" #include "restrack.h" +#include "uverbs.h" /* * Sort array elements by the netlink attribute name @@ -141,6 +142,8 @@ static const struct nla_policy nldev_policy[RDMA_NLDEV_ATTR_MAX] = { [RDMA_NLDEV_ATTR_UVERBS_DRIVER_ID] = { .type = NLA_U32 }, [RDMA_NLDEV_NET_NS_FD] = { .type = NLA_U32 }, [RDMA_NLDEV_SYS_ATTR_NETNS_MODE] = { .type = NLA_U8 }, + [RDMA_NLDEV_ATTR_RES_CTX] = { .type = NLA_NESTED }, + [RDMA_NLDEV_ATTR_RES_CTX_ENTRY] = { .type = NLA_NESTED }, }; static int put_driver_name_print_type(struct sk_buff *msg, const char *name, @@ -611,11 +614,84 @@ static int fill_res_mr_entry(struct sk_buff *msg, bool has_cap_net_admin, err: return -EMSGSIZE; } +struct context_id { + struct list_head list; + u32 id; +}; + +static void pd_context(struct ib_pd *pd, struct list_head *list, int *count) +{ + struct ib_device *device = pd->device; + struct rdma_restrack_entry *res; + struct rdma_restrack_root *rt; + struct ib_uverbs_file *ufile; + struct ib_ucontext *ucontext; + struct ib_uobject *uobj; + unsigned long flags; + unsigned long id; + bool found; + + rt = &device->res[RDMA_RESTRACK_CTX]; + + xa_lock(&rt->xa); + + xa_for_each(&rt->xa, id, res) { + if (!rdma_is_visible_in_pid_ns(res)) + continue; + + if (!rdma_restrack_get(res)) + continue; + + xa_unlock(&rt->xa); + + ucontext = container_of(res, struct ib_ucontext, res); + ufile = ucontext->ufile; + found = false; + + /* See locking requirements in struct ib_uverbs_file */ + down_read(&ufile->hw_destroy_rwsem); + spin_lock_irqsave(&ufile->uobjects_lock, flags); + + list_for_each_entry(uobj, &ufile->uobjects, list) { + if (uobj->object == pd) { + found = true; + goto found; + } + } + +found: spin_unlock_irqrestore(&ufile->uobjects_lock, flags); + up_read(&ufile->hw_destroy_rwsem); + + if (found) { + struct context_id *ctx_id = + kmalloc(sizeof(*ctx_id), GFP_KERNEL); + + if (WARN_ON_ONCE(!ctx_id)) + goto next; + + ctx_id->id = ucontext->res.id; + list_add(&ctx_id->list, list); + (*count)++; + } + +next: rdma_restrack_put(res); + xa_lock(&rt->xa); + } + + xa_unlock(&rt->xa); +} + static int fill_res_pd_entry(struct sk_buff *msg, bool has_cap_net_admin, struct rdma_restrack_entry *res, uint32_t port) { struct ib_pd *pd = container_of(res, struct ib_pd, res); struct ib_device *dev = pd->device; + struct nlattr *table_attr = NULL; + struct nlattr *entry_attr = NULL; + struct context_id *ctx_id; + struct context_id *tmp; + LIST_HEAD(pd_context_ids); + int ctx_count = 0; if (has_cap_net_admin) { if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LOCAL_DMA_LKEY, @@ -633,10 +709,38 @@ static int fill_res_pd_entry(struct sk_buff *msg, bool has_cap_net_admin, if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_PDN, res->id)) goto err; - if (!rdma_is_kernel_res(res) && - nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CTXN, - pd->uobject->context->res.id)) - goto err; + if (!rdma_is_kernel_res(res)) { + pd_context(pd, &pd_context_ids, &ctx_count); + if (ctx_count == 1) { + /* user pd, not shared */ + ctx_id = list_first_entry(&pd_context_ids, + struct context_id, list); + if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CTXN, + ctx_id->id)) + goto err; + } else if (ctx_count > 1) { + /* user pd, shared */ + table_attr = nla_nest_start(msg, + RDMA_NLDEV_ATTR_RES_CTX); + if (!table_attr) + goto err; + + list_for_each_entry(ctx_id, &pd_context_ids, list) { + entry_attr = nla_nest_start(msg, + RDMA_NLDEV_ATTR_RES_CTX_ENTRY); + if (!entry_attr) + goto err; + if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CTXN, + ctx_id->id)) + goto err; + nla_nest_end(msg, entry_attr); + entry_attr = NULL; + } + + nla_nest_end(msg, table_attr); + table_attr = NULL; + } + } if (fill_res_name_pid(msg, res)) goto err; @@ -644,9 +748,22 @@ static int fill_res_pd_entry(struct sk_buff *msg, bool has_cap_net_admin, if (fill_res_entry(dev, msg, res)) goto err; + list_for_each_entry_safe(ctx_id, tmp, &pd_context_ids, list) + kfree(ctx_id); + return 0; -err: return -EMSGSIZE; +err: + if (entry_attr) + nla_nest_end(msg, entry_attr); + + if (table_attr) + nla_nest_end(msg, table_attr); + + list_for_each_entry_safe(ctx_id, tmp, &pd_context_ids, list) + kfree(ctx_id); + + return -EMSGSIZE; } static int fill_stat_counter_mode(struct sk_buff *msg, diff --git a/include/uapi/rdma/rdma_netlink.h b/include/uapi/rdma/rdma_netlink.h index 8e277783fa96..7fbbfb07f071 100644 --- a/include/uapi/rdma/rdma_netlink.h +++ b/include/uapi/rdma/rdma_netlink.h @@ -525,6 +525,9 @@ enum rdma_nldev_attr { */ RDMA_NLDEV_ATTR_DEV_DIM, /* u8 */ + RDMA_NLDEV_ATTR_RES_CTX, /* nested table */ + RDMA_NLDEV_ATTR_RES_CTX_ENTRY, /* nested table */ + /* * Always the end */