From patchwork Mon Jul 13 16:31:24 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 11660391 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 40F7313A4 for ; Mon, 13 Jul 2020 16:31:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 29E492065F for ; Mon, 13 Jul 2020 16:31:35 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="b2ybyvCt" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730486AbgGMQbe (ORCPT ); Mon, 13 Jul 2020 12:31:34 -0400 Received: from us-smtp-2.mimecast.com ([207.211.31.81]:27500 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1730479AbgGMQbd (ORCPT ); Mon, 13 Jul 2020 12:31:33 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1594657892; 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=Iouzq0Yi3HPtZd0p4FYDjFy4Q/8dNzl3FIny7ymXMV0=; b=b2ybyvCtGeZuH0Oc+2f9biKXcRjZndZMAmY4s475xjxyDVCWsrdWK2JeKgT8Skx/WmUv33 EoErpsjjuL3zQBG5RshoglQ/jqXa/3pkuf1zUjNzJuo1HWX2KUVp5O8K97Ac/xQWrX+XiH yhw6gV0GDIQR4vwsoGhk19II/T/wLZA= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-205-ImBpIKiBM4Gp04BjYK3ydg-1; Mon, 13 Jul 2020 12:31:30 -0400 X-MC-Unique: ImBpIKiBM4Gp04BjYK3ydg-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 24F7C100A8C1; Mon, 13 Jul 2020 16:31:28 +0000 (UTC) Received: from warthog.procyon.org.uk (ovpn-112-113.rdu2.redhat.com [10.10.112.113]) by smtp.corp.redhat.com (Postfix) with ESMTP id 548C110021B3; Mon, 13 Jul 2020 16:31:24 +0000 (UTC) Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 Subject: [PATCH 04/32] vfs: Provide S_CACHE_FILE inode flag From: David Howells To: Trond Myklebust , Anna Schumaker , Steve French , Alexander Viro , Matthew Wilcox Cc: Jeff Layton , Dave Wysochanski , dhowells@redhat.com, linux-cachefs@redhat.com, linux-afs@lists.infradead.org, linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org, ceph-devel@vger.kernel.org, v9fs-developer@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Date: Mon, 13 Jul 2020 17:31:24 +0100 Message-ID: <159465788421.1376674.17851071117062513659.stgit@warthog.procyon.org.uk> In-Reply-To: <159465784033.1376674.18106463693989811037.stgit@warthog.procyon.org.uk> References: <159465784033.1376674.18106463693989811037.stgit@warthog.procyon.org.uk> User-Agent: StGit/0.22 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Sender: ceph-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org Provide an S_CACHE_FILE inode flag that cachefiles can set to ward off other kernel services and drivers (including itself) from using its cache files. Signed-off-by: David Howells --- include/linux/fs.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/linux/fs.h b/include/linux/fs.h index aa3e3af92220..33d30742b26e 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2003,6 +2003,7 @@ struct super_operations { #define S_ENCRYPTED 16384 /* Encrypted file (using fs/crypto/) */ #define S_CASEFOLD 32768 /* Casefolded file */ #define S_VERITY 65536 /* Verity file (using fs/verity/) */ +#define S_CACHE_FILE 0x20000 /* File is in use as cache file (eg. fs/cachefiles) */ /* * Note that nosuid etc flags are inode-specific: setting some file-system