From patchwork Tue Apr 19 19:51:25 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Jurgens X-Patchwork-Id: 8882991 Return-Path: X-Original-To: patchwork-linux-rdma@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 323EEBF29F for ; Tue, 19 Apr 2016 19:52:53 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3A7E520204 for ; Tue, 19 Apr 2016 19:52:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3FADC202A1 for ; Tue, 19 Apr 2016 19:52:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932832AbcDSTwt (ORCPT ); Tue, 19 Apr 2016 15:52:49 -0400 Received: from [193.47.165.129] ([193.47.165.129]:39777 "EHLO mellanox.co.il" rhost-flags-FAIL-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S932077AbcDSTws (ORCPT ); Tue, 19 Apr 2016 15:52:48 -0400 Received: from Internal Mail-Server by MTLPINE1 (envelope-from danielj@mellanox.com) with ESMTPS (AES256-SHA encrypted); 19 Apr 2016 22:51:57 +0300 Received: from x-vnc01.mtx.labs.mlnx (x-vnc01.mtx.labs.mlnx [10.12.150.16]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id u3JJph1g011960; Tue, 19 Apr 2016 22:51:56 +0300 From: Dan Jurgens To: selinux@tycho.nsa.gov, linux-security-module@vger.kernel.org, linux-rdma@vger.kernel.org Cc: yevgenyp@mellanox.com, Daniel Jurgens Subject: [RFC PATCH v3 08/12] ib/core: IB cache enhancements to support Infiniband security Date: Tue, 19 Apr 2016 22:51:25 +0300 Message-Id: <1461095489-18732-9-git-send-email-danielj@mellanox.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1461095489-18732-1-git-send-email-danielj@mellanox.com> References: <1461095489-18732-1-git-send-email-danielj@mellanox.com> Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Spam-Status: No, score=-7.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Daniel Jurgens Cache the subnet prefix and add a function to access it. Enforcing security requires frequent queries of the subnet prefix and the pkeys in the pkey table. Also removed an unneded pr_warn about memory allocation failure. Signed-off-by: Daniel Jurgens Reviewed-by: Eli Cohen Reviewed-by: Leon Romanovsky --- v2: Added to series. v3: 1. Removed unneccesary pr_warn after mem alloc failure. Leon --- drivers/infiniband/core/cache.c | 35 +++++++++++++++++++++++++++++++++-- drivers/infiniband/core/core_priv.h | 3 +++ include/rdma/ib_verbs.h | 1 + 3 files changed, 37 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/core/cache.c b/drivers/infiniband/core/cache.c index cb00d59..f1d602f 100644 --- a/drivers/infiniband/core/cache.c +++ b/drivers/infiniband/core/cache.c @@ -925,6 +925,25 @@ int ib_get_cached_pkey(struct ib_device *device, } EXPORT_SYMBOL(ib_get_cached_pkey); +int ib_get_cached_subnet_prefix(struct ib_device *device, + u8 port_num, + u64 *sn_pfx) +{ + unsigned long flags; + int p = port_num - rdma_start_port(device); + + if (port_num < rdma_start_port(device) || + port_num > rdma_end_port(device)) + return -EINVAL; + + read_lock_irqsave(&device->cache.lock, flags); + *sn_pfx = device->cache.subnet_prefix_cache[p]; + read_unlock_irqrestore(&device->cache.lock, flags); + + return 0; +} +EXPORT_SYMBOL(ib_get_cached_subnet_prefix); + int ib_find_cached_pkey(struct ib_device *device, u8 port_num, u16 pkey, @@ -1101,6 +1120,8 @@ static void ib_cache_update(struct ib_device *device, device->cache.lmc_cache[port - rdma_start_port(device)] = tprops->lmc; + device->cache.subnet_prefix_cache[port - rdma_start_port(device)] = + tprops->subnet_prefix; write_unlock_irq(&device->cache.lock); kfree(gid_cache); @@ -1159,9 +1180,18 @@ int ib_cache_setup_one(struct ib_device *device) (rdma_end_port(device) - rdma_start_port(device) + 1), GFP_KERNEL); + + device->cache.subnet_prefix_cache = kcalloc((rdma_end_port(device) - + rdma_start_port(device) + 1), + sizeof(*device->cache.subnet_prefix_cache), + GFP_KERNEL); + if (!device->cache.pkey_cache || - !device->cache.lmc_cache) { - pr_warn("Couldn't allocate cache for %s\n", device->name); + !device->cache.lmc_cache || + !device->cache.subnet_prefix_cache) { + kfree(device->cache.pkey_cache); + kfree(device->cache.lmc_cache); + kfree(device->cache.subnet_prefix_cache); return -ENOMEM; } @@ -1204,6 +1234,7 @@ void ib_cache_release_one(struct ib_device *device) gid_table_release_one(device); kfree(device->cache.pkey_cache); kfree(device->cache.lmc_cache); + kfree(device->cache.subnet_prefix_cache); } void ib_cache_cleanup_one(struct ib_device *device) diff --git a/drivers/infiniband/core/core_priv.h b/drivers/infiniband/core/core_priv.h index eab3221..722b866 100644 --- a/drivers/infiniband/core/core_priv.h +++ b/drivers/infiniband/core/core_priv.h @@ -137,4 +137,7 @@ static inline bool rdma_is_upper_dev_rcu(struct net_device *dev, return _upper == upper; } +int ib_get_cached_subnet_prefix(struct ib_device *device, + u8 port_num, + u64 *sn_pfx); #endif /* _CORE_PRIV_H */ diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 66d37b8..870c5ac 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -1616,6 +1616,7 @@ struct ib_cache { struct ib_pkey_cache **pkey_cache; struct ib_gid_table **gid_cache; u8 *lmc_cache; + u64 *subnet_prefix_cache; }; struct ib_dma_mapping_ops {