From patchwork Thu Oct 17 15:00:28 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Carlos Antonio Neira Bustos X-Patchwork-Id: 1178715 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="k51BRc1u"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 46vC5w1yNjz9sPV for ; Fri, 18 Oct 2019 02:00:52 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2406593AbfJQPAq (ORCPT ); Thu, 17 Oct 2019 11:00:46 -0400 Received: from mail-qk1-f193.google.com ([209.85.222.193]:42452 "EHLO mail-qk1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731768AbfJQPAp (ORCPT ); Thu, 17 Oct 2019 11:00:45 -0400 Received: by mail-qk1-f193.google.com with SMTP id f16so2131220qkl.9; Thu, 17 Oct 2019 08:00:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=p5dmhqgXzU0PAo+f6c2oMinYRJIOzYqFfyKVcX2FFw4=; b=k51BRc1uXGSeUt3GuXgKvxxmHEPuVIepTatdB1k/6uxcC17yc0gfVyoAUyqN2F2Vix 6P1OEAXWw6VdSFYmywA6JhR1jZiP7vvFUpO//Re5ahA2eFSSUsz44w6ke5+91hpTUJt1 06AFNe6uKYvCeVk15wE5EvK1AYM5eu9WSfW2qkjuRCf/av93X7A2zW7HyVVzqNOXlXN0 WJCeLeZhJoM1zr80t7YpUqbPK6kkoR1e3SNpLPgDKfh0sU/eUwRUkd4yB4lnpxg75ynI 2iCTru9sdZBacH2SnmTfiNek1SdB3g93JIA8+SwLY23wHN2ZKD248fujOpfO6yKiXl5u EnMQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=p5dmhqgXzU0PAo+f6c2oMinYRJIOzYqFfyKVcX2FFw4=; b=Rb8RZ1rxUowzZoCkVrc08zLzU9+aglg668JnskR5Y7mGqaUST1LAQl7V+CUZ23Dtkf XP1+5hZVi6bviu8pLeYBkgT1kte+wXzmtuLASSMOl9iIK6YTVzN0voI16agpI01li+7B kG/YGAd55QL9mVcn1/6cquUeYH6t45/oRAtiePS/CKsRxwdf8m3jpYx9qnEd/JoaQtmU ctWdnbzX/XJ0ZQyvaqD+y/1IM7pK447L2s/A3wJWPfTgUiw5ZKQmt10tm0JKeuinWxiD CFYoOIzTnK3yuCgr2/Xgc0CKc8aCMtWhN1ylbcnL8QPNAZpKfqLPynES3Y7VWrliE8Qh 7Feg== X-Gm-Message-State: APjAAAWV4/KOMhQQNiKSIAd/toWYbHuIwIYM7UP+JihT20BDdXN+uD2g gTzk1NOXZ1fpQeLGA2RTu2AMvzxUrdk= X-Google-Smtp-Source: APXvYqxkmdMbFO9hxXAN2IWOVudz+DdzpYmQeZRgxUX/nhwtlE94hdDOQmo3PSVEvdZ1RouD7WDdYg== X-Received: by 2002:a37:4701:: with SMTP id u1mr3786419qka.44.1571324444058; Thu, 17 Oct 2019 08:00:44 -0700 (PDT) Received: from ebpf00.byteswizards.com ([190.162.109.190]) by smtp.googlemail.com with ESMTPSA id z20sm1550859qtu.91.2019.10.17.08.00.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Oct 2019 08:00:43 -0700 (PDT) From: Carlos Neira To: netdev@vger.kernel.org Cc: yhs@fb.com, ebiederm@xmission.com, brouer@redhat.com, bpf@vger.kernel.org, cneirabustos@gmail.com Subject: [PATCH v14 1/5] fs/nsfs.c: added ns_match Date: Thu, 17 Oct 2019 12:00:28 -0300 Message-Id: <20191017150032.14359-2-cneirabustos@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191017150032.14359-1-cneirabustos@gmail.com> References: <20191017150032.14359-1-cneirabustos@gmail.com> MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org ns_match returns true if the namespace inode and dev_t matches the ones provided by the caller. Signed-off-by: Carlos Neira --- fs/nsfs.c | 8 ++++++++ include/linux/proc_ns.h | 2 ++ 2 files changed, 10 insertions(+) diff --git a/fs/nsfs.c b/fs/nsfs.c index a0431642c6b5..256f6295d33d 100644 --- a/fs/nsfs.c +++ b/fs/nsfs.c @@ -245,6 +245,14 @@ struct file *proc_ns_fget(int fd) return ERR_PTR(-EINVAL); } +/* Returns true if current namespace matches dev/ino. + */ +bool ns_match(const struct ns_common *ns, dev_t dev, ino_t ino) +{ + return ((ns->inum == ino) && (nsfs_mnt->mnt_sb->s_dev == dev)); +} + + static int nsfs_show_path(struct seq_file *seq, struct dentry *dentry) { struct inode *inode = d_inode(dentry); diff --git a/include/linux/proc_ns.h b/include/linux/proc_ns.h index d31cb6215905..1da9f33489f3 100644 --- a/include/linux/proc_ns.h +++ b/include/linux/proc_ns.h @@ -82,6 +82,8 @@ typedef struct ns_common *ns_get_path_helper_t(void *); extern void *ns_get_path_cb(struct path *path, ns_get_path_helper_t ns_get_cb, void *private_data); +extern bool ns_match(const struct ns_common *ns, dev_t dev, ino_t ino); + extern int ns_get_name(char *buf, size_t size, struct task_struct *task, const struct proc_ns_operations *ns_ops); extern void nsfs_init(void);