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[212.96.48.140]) by smtp.gmail.com with ESMTPSA id t16sm2862734wmi.27.2020.05.05.02.59.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 05 May 2020 02:59:21 -0700 (PDT) From: Miklos Szeredi To: Al Viro Cc: linux-fsdevel@vger.kernel.org Subject: [PATCH 04/12] utimensat: AT_EMPTY_PATH support Date: Tue, 5 May 2020 11:59:07 +0200 Message-Id: <20200505095915.11275-5-mszeredi@redhat.com> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20200505095915.11275-1-mszeredi@redhat.com> References: <20200505095915.11275-1-mszeredi@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 1d17ce98cb80..b7b927502d6e 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) -- 2.21.1