From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 91492C433FF for ; Thu, 15 Aug 2019 08:38:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 66D542235C for ; Thu, 15 Aug 2019 08:38:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1565858334; bh=L11hKorvZW28GkqLNvqA7712NVQnrQhNz6gTBU98o08=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=JbEhOnLrgSwdvjDp5Ajlk8lCaDvODLX9ffc1p0SX3yxy2OMrl1C2EEJbkba10iS8Z 4E+j/huNseb36vibVTQh812VvGDNd9p4k1yxxyz6Ra4Ay1xZXUczwHRJh+CmDsOxvC SpL4ww0yWHyyBRVOz0xLfvXnuEOUpVlUiYcDM6TE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730823AbfHOIix (ORCPT ); Thu, 15 Aug 2019 04:38:53 -0400 Received: from mail.kernel.org ([198.145.29.99]:56210 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725875AbfHOIix (ORCPT ); Thu, 15 Aug 2019 04:38:53 -0400 Received: from localhost (unknown [193.47.165.251]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 3B7E522387; Thu, 15 Aug 2019 08:38:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1565858332; bh=L11hKorvZW28GkqLNvqA7712NVQnrQhNz6gTBU98o08=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=W41x+rE595eTdj27//nC1F35v6/U4pzuF3ytySOOZMMxa3XFmTW+vgLaga27Wke1x ve2IV8g28t3wEA8+AVddID0sccZHTY9YZF6wWy/HSJOXNXwBkc62ufScJ2FgvW8bVg CF4GXahJMS7mJFt96ZV4Gxw3E0xepXVtL8j9zKIQ= From: Leon Romanovsky To: Doug Ledford , Jason Gunthorpe Cc: Leon Romanovsky , RDMA mailing list , Guy Levi , Ido Kalir , Jason Gunthorpe , Majd Dibbiny , Mark Zhang , Moni Shoua Subject: [PATCH rdma-rc 3/8] RDMA/restrack: Rewrite PID namespace check to be reliable Date: Thu, 15 Aug 2019 11:38:29 +0300 Message-Id: <20190815083834.9245-4-leon@kernel.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190815083834.9245-1-leon@kernel.org> References: <20190815083834.9245-1-leon@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org From: Leon Romanovsky task_active_pid_ns() is wrong API to check PID namespace because it posses some restrictions and return PID namespace where the process was allocated. It created mismatches with current namespace, which can be different. Rewrite whole rdma_is_visible_in_pid_ns() logic to provide reliable results without any relation to allocated PID namespace. Fixes: 8be565e65fa9 ("RDMA/nldev: Factor out the PID namespace check") Fixes: 6a6c306a09b5 ("RDMA/restrack: Make is_visible_in_pid_ns() as an API") Reviewed-by: Mark Zhang Signed-off-by: Leon Romanovsky --- drivers/infiniband/core/nldev.c | 3 +-- drivers/infiniband/core/restrack.c | 15 +++++++-------- include/rdma/restrack.h | 3 +-- 3 files changed, 9 insertions(+), 12 deletions(-) diff --git a/drivers/infiniband/core/nldev.c b/drivers/infiniband/core/nldev.c index 87d40d1ecdde..020c26976558 100644 --- a/drivers/infiniband/core/nldev.c +++ b/drivers/infiniband/core/nldev.c @@ -382,8 +382,7 @@ static int fill_res_info(struct sk_buff *msg, struct ib_device *device) for (i = 0; i < RDMA_RESTRACK_MAX; i++) { if (!names[i]) continue; - curr = rdma_restrack_count(device, i, - task_active_pid_ns(current)); + curr = rdma_restrack_count(device, i); ret = fill_res_info_entry(msg, names[i], curr); if (ret) goto err; diff --git a/drivers/infiniband/core/restrack.c b/drivers/infiniband/core/restrack.c index bddff426ee0f..a07665f7ef8c 100644 --- a/drivers/infiniband/core/restrack.c +++ b/drivers/infiniband/core/restrack.c @@ -107,10 +107,8 @@ void rdma_restrack_clean(struct ib_device *dev) * rdma_restrack_count() - the current usage of specific object * @dev: IB device * @type: actual type of object to operate - * @ns: PID namespace */ -int rdma_restrack_count(struct ib_device *dev, enum rdma_restrack_type type, - struct pid_namespace *ns) +int rdma_restrack_count(struct ib_device *dev, enum rdma_restrack_type type) { struct rdma_restrack_root *rt = &dev->res[type]; struct rdma_restrack_entry *e; @@ -119,10 +117,9 @@ int rdma_restrack_count(struct ib_device *dev, enum rdma_restrack_type type, xa_lock(&rt->xa); xas_for_each(&xas, e, U32_MAX) { - if (ns == &init_pid_ns || - (!rdma_is_kernel_res(e) && - ns == task_active_pid_ns(e->task))) - cnt++; + if (!rdma_is_visible_in_pid_ns(e)) + continue; + cnt++; } xa_unlock(&rt->xa); return cnt; @@ -360,5 +357,7 @@ bool rdma_is_visible_in_pid_ns(struct rdma_restrack_entry *res) */ if (rdma_is_kernel_res(res)) return task_active_pid_ns(current) == &init_pid_ns; - return task_active_pid_ns(current) == task_active_pid_ns(res->task); + + /* PID 0 means that resource is not found in current namespace */ + return task_pid_vnr(res->task); } diff --git a/include/rdma/restrack.h b/include/rdma/restrack.h index b0fc6b26bdf5..83df1ec6664e 100644 --- a/include/rdma/restrack.h +++ b/include/rdma/restrack.h @@ -105,8 +105,7 @@ struct rdma_restrack_entry { }; int rdma_restrack_count(struct ib_device *dev, - enum rdma_restrack_type type, - struct pid_namespace *ns); + enum rdma_restrack_type type); void rdma_restrack_kadd(struct rdma_restrack_entry *res); void rdma_restrack_uadd(struct rdma_restrack_entry *res); -- 2.20.1