From patchwork Tue Jul 30 05:16:00 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Al Viro X-Patchwork-Id: 13746564 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 053C3192B84; Tue, 30 Jul 2024 05:15:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722316500; cv=none; b=V5UxSNMSY52TXgQgqv7F00KlpBeUP74HeBPuy+VaU+v431iW0XljWJJzKryRNEt/QAOLuUrPXOcJLu8jQI56T3GatAve93+TLZjDP/I5RMNHhH0wb4wPoFBCUWh9ETyIohzrJyuzSQqO4RI7jRDliWkeTC25lbBMgXbTmeeRg/4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722316500; c=relaxed/simple; bh=C9s9vnA2CIrtnqUqtVhZbKJzmmtvZ7h6xpVpdKEJ0R0=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=QTGqC/KDw//aVo4eqb6ry6DUNHb9Gb07dyGPpFn033UBof4EJ+qtmDS+2zA1Bj4j25mu2memcE1u2nBxTfOc4wR0vNbGTuELLB81Eq1ErZIGQsYSHsu/A06IjRYE8Bv80WzdhywUBAOM2g0KMWvwpQ+efUzaOvWqk68rwR5pmuM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=IYjXX46u; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="IYjXX46u" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2C447C4AF0C; Tue, 30 Jul 2024 05:14:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1722316499; bh=C9s9vnA2CIrtnqUqtVhZbKJzmmtvZ7h6xpVpdKEJ0R0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IYjXX46uOlNJPUdpGAVnBWnNyaZCDPD1/RcypTor+XkBu8tpShfWatCWO/WIkjHcI 46RMOnZQYYV+NVBiadNJ9C5d/12EeBviaYHuV4UMCeY/3jd6QxGre4CpEI/CVqeWM5 5aGbt15b1Ji2Ev3PPGQjspSTnz6+JtBukRSmDNTyn30eLaBfSEW09/9inwR7FJnW+C ZbYXqvzDYRTjs4MrwhOOHZ9LLHD5hGU0nj/ly18aZMUL8GegI29DCq6+ig3lWemL22 PY1ucDS3Y/wUcFI+OF5ChLkGUslXVlpd61iLbyx0ooDVPfIyAxQLhV0EOilHovpcA3 xcC3ZNEe4TWmA== From: viro@kernel.org To: linux-fsdevel@vger.kernel.org Cc: amir73il@gmail.com, bpf@vger.kernel.org, brauner@kernel.org, cgroups@vger.kernel.org, kvm@vger.kernel.org, netdev@vger.kernel.org, torvalds@linux-foundation.org Subject: [PATCH 14/39] simplify xfs_find_handle() a bit Date: Tue, 30 Jul 2024 01:16:00 -0400 Message-Id: <20240730051625.14349-14-viro@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240730051625.14349-1-viro@kernel.org> References: <20240730050927.GC5334@ZenIV> <20240730051625.14349-1-viro@kernel.org> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Al Viro XFS_IOC_FD_TO_HANDLE can grab a reference to copied ->f_path and let the file go; results in simpler control flow - cleanup is the same for both "by descriptor" and "by pathname" cases. Signed-off-by: Al Viro --- fs/xfs/xfs_handle.c | 16 +++++++--------- 1 file changed, 7 insertions(+), 9 deletions(-) diff --git a/fs/xfs/xfs_handle.c b/fs/xfs/xfs_handle.c index 49e5e5f04e60..f19fce557354 100644 --- a/fs/xfs/xfs_handle.c +++ b/fs/xfs/xfs_handle.c @@ -85,22 +85,23 @@ xfs_find_handle( int hsize; xfs_handle_t handle; struct inode *inode; - struct fd f = EMPTY_FD; struct path path; int error; struct xfs_inode *ip; if (cmd == XFS_IOC_FD_TO_HANDLE) { - f = fdget(hreq->fd); - if (!fd_file(f)) + CLASS(fd, f)(hreq->fd); + + if (fd_empty(f)) return -EBADF; - inode = file_inode(fd_file(f)); + path = fd_file(f)->f_path; + path_get(&path); } else { error = user_path_at(AT_FDCWD, hreq->path, 0, &path); if (error) return error; - inode = d_inode(path.dentry); } + inode = d_inode(path.dentry); ip = XFS_I(inode); /* @@ -134,10 +135,7 @@ xfs_find_handle( error = 0; out_put: - if (cmd == XFS_IOC_FD_TO_HANDLE) - fdput(f); - else - path_put(&path); + path_put(&path); return error; }