From patchwork Thu Nov 28 15:59:34 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Miklos Szeredi X-Patchwork-Id: 11266325 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 67B4D138C for ; Thu, 28 Nov 2019 15:59:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 46D5D2178F for ; Thu, 28 Nov 2019 15:59:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="SCOQkmKt" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726856AbfK1P7z (ORCPT ); Thu, 28 Nov 2019 10:59:55 -0500 Received: from us-smtp-2.mimecast.com ([207.211.31.81]:31235 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726835AbfK1P7y (ORCPT ); Thu, 28 Nov 2019 10:59:54 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1574956792; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=++SFQmyMsWq4exmbdoSpQ2cr72U0QKtKCLX6290nr5k=; b=SCOQkmKti1yqzW9VzRLqKLDzaHBYHQmui4g1ff3uAlD7+T+ZnCHFaOynTVcS8w7sLcMt7U nY+nlFt+lK8lMn75AilAN8kZd3GjH1afbizYHDZgUoULzR9BPF2k/L0A+UgS6CP5Qtrg3M n4t5aRyO/ButMbv7I+9FWnAloLqwjuA= Received: from mail-wr1-f72.google.com (mail-wr1-f72.google.com [209.85.221.72]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-79-tZeNVJVOPcOQ4X-6stlOwA-1; Thu, 28 Nov 2019 10:59:51 -0500 Received: by mail-wr1-f72.google.com with SMTP id k15so13976866wrp.22 for ; Thu, 28 Nov 2019 07:59:51 -0800 (PST) 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=WV43MHYixZY7eKNI8jC3xjsYFEcLSUPr+KYHrksoiEI=; b=FuzLXfFVlt5rX5YZuPnKw/ZqDEkPuYsaYCdcXWRcwqtqqAdpmsS/jyBWo6ycSXfy3R NiFd1IzCJjt7yZvpM9MbOxK/Vi+NeF1j8uyenzNxhsT6FVARFAwwnbtnZuKxKPjv74yR 5fvR4AMSv45l6f3rfs2S/7gWMbALNVqO74su9O3HwJVyuoWasoFBQXdtQFaD+tC/N0ZT xpNtHHjrILzwov1a3n/LaRpXcCoOsRR9UAW/BENKPBAkq5gQY5N8I3Va+UsKXoQBoICc 76RPcDo3MJ3nrsICT3rN3crulJHpva9bOwPygcsY3a0M41trg1JFdMkZknSh0LKVaTn8 IGsg== X-Gm-Message-State: APjAAAWmXMAjl/5t3majy+xTcMbWUgUE8ImzuEn4hgZheEuX0iSIUEmC yW7tBG/UCa35TxTki/8R/ei0qg29Y3MjZRVcp/g3ZQ2dt034gYVL6okefXQmf+LKdJp7DaAcjV+ YxpCIAr3cmxmIvsPIBSg/wMHcTQ== X-Received: by 2002:adf:ea42:: with SMTP id j2mr12177102wrn.270.1574956790350; Thu, 28 Nov 2019 07:59:50 -0800 (PST) X-Google-Smtp-Source: APXvYqwp5bvhWAOaiRuMR96ArIY/Y981BLL4CkQKEnXAsc167f7gqMcg3rP2HUwxNCAGZc8eO4RAaA== X-Received: by 2002:adf:ea42:: with SMTP id j2mr12177091wrn.270.1574956790118; Thu, 28 Nov 2019 07:59:50 -0800 (PST) Received: from miu.piliscsaba.redhat.com (catv-212-96-48-140.catv.broadband.hu. [212.96.48.140]) by smtp.gmail.com with ESMTPSA id 2sm23689474wrq.31.2019.11.28.07.59.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 Nov 2019 07:59:49 -0800 (PST) From: Miklos Szeredi To: Al Viro Cc: linux-fsdevel@vger.kernel.org Subject: [PATCH 06/12] utimensat: AT_EMPTY_PATH support Date: Thu, 28 Nov 2019 16:59:34 +0100 Message-Id: <20191128155940.17530-7-mszeredi@redhat.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20191128155940.17530-1-mszeredi@redhat.com> References: <20191128155940.17530-1-mszeredi@redhat.com> MIME-Version: 1.0 X-MC-Unique: tZeNVJVOPcOQ4X-6stlOwA-1 X-Mimecast-Spam-Score: 0 Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org This makes it possible to use utimensat on an O_PATH file (including symlinks). It supersedes the nonstandard utimensat(fd, NULL, ...) form. Signed-off-by: Miklos Szeredi --- fs/utimes.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/fs/utimes.c b/fs/utimes.c index 1ba3f7883870..c07cb0dddbb6 100644 --- a/fs/utimes.c +++ b/fs/utimes.c @@ -95,13 +95,13 @@ long do_utimes(int dfd, const char __user *filename, struct timespec64 *times, goto out; } - if (flags & ~AT_SYMLINK_NOFOLLOW) + if (flags & ~(AT_SYMLINK_NOFOLLOW | AT_EMPTY_PATH)) goto out; if (filename == NULL && dfd != AT_FDCWD) { struct fd f; - if (flags & AT_SYMLINK_NOFOLLOW) + if (flags) goto out; f = fdget(dfd); @@ -117,6 +117,8 @@ long do_utimes(int dfd, const char __user *filename, struct timespec64 *times, if (!(flags & AT_SYMLINK_NOFOLLOW)) lookup_flags |= LOOKUP_FOLLOW; + if (flags & AT_EMPTY_PATH) + lookup_flags |= LOOKUP_EMPTY; retry: error = user_path_at(dfd, filename, lookup_flags, &path); if (error)