From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from zeniv.linux.org.uk (zeniv.linux.org.uk [62.89.141.173]) (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 8791F22D4EF; Thu, 29 May 2025 17:38:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=62.89.141.173 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748540296; cv=none; b=Oh2Bu9LD/B4IG2SVrmNZ4uLeLEzfglPa7kS5abIvBOPJ/a2KimkQVKCmkrOF8T1zx9ZWbNs7vRCMbxDbqStN/EqIE3ItMi4rjtasbRqc4zqPl4L0v30JosJrjuZtuUQC0XzJLLcRpgYhz3tSwW5DkctlEKUd6Ck3eYlo0JARxdc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748540296; c=relaxed/simple; bh=u5W8+G4Kc80GVPR5lDWHQq/K4gBJuA+Me3jvmg/cMcE=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=o7n0TafSbUw94Xel5Sp3uvNvIWIcpV5JE2Im5alkYUDE2BgVn1rDIUrdU89xoHsznQ1djwqjdYPacGuEFQDD/m+B00c2CwDpi9KK9M0OZaMZN/6JMS8mFbez4lRFkY57eFiYUh7pPrXCmIoPyZdCobU6RwJ8Fhg9sFlc/cTRV5g= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zeniv.linux.org.uk; spf=none smtp.mailfrom=ftp.linux.org.uk; dkim=pass (2048-bit key) header.d=linux.org.uk header.i=@linux.org.uk header.b=mNkCvsum; arc=none smtp.client-ip=62.89.141.173 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zeniv.linux.org.uk Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=ftp.linux.org.uk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linux.org.uk header.i=@linux.org.uk header.b="mNkCvsum" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=linux.org.uk; s=zeniv-20220401; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=u5W8+G4Kc80GVPR5lDWHQq/K4gBJuA+Me3jvmg/cMcE=; b=mNkCvsumMnTM1jruECZSDfplVQ 4ejHwx651aciRGIvYai0NFiojOgNy4zti3mTyKygL30Y6ROgUvkDnL8eIG8tZN4lUY/FwD1GEIh5n ww09S4N/VphC5OQzfcW5j+QjjnAeIHJLnWYYFMYQbB8T5+V8KudA/osGtw7sZtxqhUuDzz/i0Pq9V MvQVEMd+5/SlOL4Srh3tBRCa1UL0dd7wlYCRjPno1tN5j1gSXCXkueVRCZDXseWjCbMLTyX7D7diS qHd5yKJRZ4N67NZGpSDlDEhSgTIxunkYGZD3xmrkrVrwY13US9yGkx2p4Gvwg8hwaJ/wA51pJJpC4 +eKm0uzA==; Received: from viro by zeniv.linux.org.uk with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1uKhCk-00000001rPl-0bsy; Thu, 29 May 2025 17:38:10 +0000 Date: Thu, 29 May 2025 18:38:10 +0100 From: Al Viro To: Song Liu Cc: Jan Kara , bpf@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, kernel-team@meta.com, andrii@kernel.org, eddyz87@gmail.com, ast@kernel.org, daniel@iogearbox.net, martin.lau@linux.dev, brauner@kernel.org, kpsingh@kernel.org, mattbobrowski@google.com, amir73il@gmail.com, repnop@google.com, jlayton@kernel.org, josef@toxicpanda.com, mic@digikod.net, gnoack@google.com Subject: Re: [PATCH bpf-next 3/4] bpf: Introduce path iterator Message-ID: <20250529173810.GJ2023217@ZenIV> References: <20250528222623.1373000-1-song@kernel.org> <20250528222623.1373000-4-song@kernel.org> <20250528223724.GE2023217@ZenIV> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: Al Viro On Thu, May 29, 2025 at 09:53:21AM -0700, Song Liu wrote: > Current version of path iterator only supports walking towards the root, > with helper path_parent. But the path iterator API can be extended > to cover other use cases. Clarify the last part, please - call me paranoid, but that sounds like a beginning of something that really should be discussed upfront.