From patchwork Wed Oct 9 15:26:29 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: 1173808 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 (mailfrom) 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="JQUFbOOr"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 46pJ3X0TVwz9sN1 for ; Thu, 10 Oct 2019 02:26:48 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731669AbfJIP0r (ORCPT ); Wed, 9 Oct 2019 11:26:47 -0400 Received: from mail-qt1-f194.google.com ([209.85.160.194]:37961 "EHLO mail-qt1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729644AbfJIP0q (ORCPT ); Wed, 9 Oct 2019 11:26:46 -0400 Received: by mail-qt1-f194.google.com with SMTP id j31so3995968qta.5; Wed, 09 Oct 2019 08:26:45 -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=JQUFbOOr0m2S/6J7hF2a2oUAuXvKLCHe0lUxqbfqt+Lj9OurgMvglKCH/Xf28yA559 h2uD5C4Jtom4azADB4I3xcuDaSsuMa2w5phBRq5BXnn9s+Bwo34m2pEzZGLkMGfHaQPk fhJytCBvuTeIqr4WB907sZX6jNpUUpSqCzpDMrfoEF68bzraO0uCGUjhm1q1Ri7QAkHD W2KjA5GDtSD3I3XrivH3SdcbvJGKJ9X50z+8gdKqXp1joVyyZmFPhjm57Kj+ep3h/Iz/ RhYB//ji6wY2QyoqmzrQHw7JUMIynY2vQ7QZP56xQ4k5OoxsIl6OQT6Q5fB2Rd3s7mLf 36FA== 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=MTPE9JbJb+MVE3FM+gEsSL7xqw+FT26pyUGh8VV9kzo+UFfXCm5mripVHBDRP6E70E NJKbkhiRzR+5fBVSZQqsJAcAWelGkJSn2qvo2IxAvDkR0Qf7s7H+lXBNJ2kBRnbo08YR ca2K3WuYvv98AgbJUhxtqItxq9pbgoSoEwPcLiNhCmgzbeGzkYthln1rspF80Jw9JQaq L2jtJLZHj/5fHMR/vOKzGYio6cKPx1KbQ4JLKhv8FQc5uNcqdb5OnOtVRDSPlcdv08aN 8Z7TGoeehJxoZtEujVvMbBhsOuNMD2EsBwHO8ROdBGJviihYJ7E4jqUsmChbkS1cXsPk mCjw== X-Gm-Message-State: APjAAAVBtHYo5soZvlBF4qhWYtHtXbgF5xaWAp79QCQbL40GvViVk+tf ddYn0jBKp7nw+UftLT1G9yYZ1z67of0= X-Google-Smtp-Source: APXvYqyUk6o30HfmfZPYSqRb/QMCORCLqqUcdLCq96cJIugL8cxFGwuq8Z65RgAmiRIXtQ8i3/qM6Q== X-Received: by 2002:a0c:fe02:: with SMTP id x2mr4111814qvr.117.1570634805071; Wed, 09 Oct 2019 08:26:45 -0700 (PDT) Received: from ebpf00.byteswizards.com ([190.162.109.190]) by smtp.googlemail.com with ESMTPSA id l189sm1049895qke.69.2019.10.09.08.26.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Oct 2019 08:26:44 -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 v13 1/4] fs/nsfs.c: added ns_match Date: Wed, 9 Oct 2019 12:26:29 -0300 Message-Id: <20191009152632.14218-2-cneirabustos@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191009152632.14218-1-cneirabustos@gmail.com> References: <20191009152632.14218-1-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);