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=-9.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 DE61DCA9EA0 for ; Tue, 22 Oct 2019 19:18:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B00552184C for ; Tue, 22 Oct 2019 19:18:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="VUZQposs" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732746AbfJVTSI (ORCPT ); Tue, 22 Oct 2019 15:18:08 -0400 Received: from mail-qt1-f193.google.com ([209.85.160.193]:45065 "EHLO mail-qt1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727851AbfJVTSI (ORCPT ); Tue, 22 Oct 2019 15:18:08 -0400 Received: by mail-qt1-f193.google.com with SMTP id c21so28444654qtj.12; Tue, 22 Oct 2019 12:18:06 -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=AhKfE6tOCfM1Lz5a/uUPR4TRFtdWhoskXzdYNzZtSYA=; b=VUZQpossR5/DSU3TtkLRvDciKo/SEJ+BTyo2LJuV+tFZAIZeJIV6KOaIAQLA4OOtpg ux9j6WF8w+wYWBa6P+I9bo7bZIFeKP9e+hzaMRkbN+Hb4LhADQ0CwtEKogZ8RAROrVxI wznb0FmBUhhEP2qa9b+Mm0njPe/AtASN2YyFBNOkHeZRho0ETzZ7ALVHvM9lS8qUELk/ IYTEMmrmuMEJoaacIImOOzbblah0SyAN7P5LkD7UBd0ECkiQDPqEVlgo/wO6u2gvT1m9 Ub13QvFtQK9TRoPdLrElXcdA7s4thTDq6bQyW7UMJrJTTFtEg0D9QTar66gvmGhE2Ui/ 7oGw== 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=AhKfE6tOCfM1Lz5a/uUPR4TRFtdWhoskXzdYNzZtSYA=; b=Gt4kFHB3/hnQEJgRC+/buZftwd6bf6MNtI5WnimHgtpNFdoggQpJfOGsCPZYdx/7v8 jyYJQwcHNXAsWWKZZfU5Pm4xx64x+C4KnQPQlFKnd6j3oH4AdSjq1kN+ZZMhp5X+cqFP 3xyQRBGNevR5TbXBYxVzncWH90x8OmLyJD/phZoCV8zjXxO0kpP0RkjlD5bMuDSbTR4y e3/DxFuBN3nUVWuVGb0uWBJuH6O0lWQh7CgNaIIdfNFjYAySLWiWb6tYBmtGULTDNZs1 iC2oK96V6AscATmhMoW6usik4ob7tQTZTmxuqSMRjmI8yQbAVq3GM0CLBUDxJUCKQFEh ejgA== X-Gm-Message-State: APjAAAWVBQLcE5xLUDRdEY39d2xahAiTZ9Cq7nrpUEXqoDykA0cr9bka zwsXE2bkTZTJk7NG4ZD92jPbyGPls1WoSsnh X-Google-Smtp-Source: APXvYqybe/SbRxnnsrSqqjNtPeQFgjh3jRvTIO9mKKkRShBJajm9Ks24DGOdrZ8M7tlTwXl5lUtfIA== X-Received: by 2002:a0c:d0e1:: with SMTP id b30mr4874313qvh.197.1571771885223; Tue, 22 Oct 2019 12:18:05 -0700 (PDT) Received: from ebpf00.byteswizards.com ([190.162.109.190]) by smtp.googlemail.com with ESMTPSA id r36sm8015969qta.27.2019.10.22.12.18.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 22 Oct 2019 12:18:04 -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 v15 1/5] fs/nsfs.c: added ns_match Date: Tue, 22 Oct 2019 16:17:47 -0300 Message-Id: <20191022191751.3780-2-cneirabustos@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191022191751.3780-1-cneirabustos@gmail.com> References: <20191022191751.3780-1-cneirabustos@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@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 | 14 ++++++++++++++ include/linux/proc_ns.h | 2 ++ 2 files changed, 16 insertions(+) diff --git a/fs/nsfs.c b/fs/nsfs.c index a0431642c6b5..ef59cf347285 100644 --- a/fs/nsfs.c +++ b/fs/nsfs.c @@ -245,6 +245,20 @@ struct file *proc_ns_fget(int fd) return ERR_PTR(-EINVAL); } +/** + * ns_match() - Returns true if current namespace matches dev/ino provided. + * @ns_common: current ns + * @dev: dev_t from nsfs that will be matched against current nsfs + * @ino: ino_t from nsfs that will be matched against current nsfs + * + * Return: true if dev and ino matches the current nsfs. + */ +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); -- 2.20.1