From patchwork Fri Nov 20 15:18:13 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 1403834 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-cifs-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=aF2V9s6j; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4Cd0Yx3Szjz9sTL for ; Sat, 21 Nov 2020 02:18:45 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728671AbgKTPS3 (ORCPT ); Fri, 20 Nov 2020 10:18:29 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:38872 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729585AbgKTPS2 (ORCPT ); Fri, 20 Nov 2020 10:18:28 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1605885508; 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=xFy7qM0/8Y7ysTXRC0McVVXyDOlGEw1UMMIueaGD11M=; b=aF2V9s6jiczozIc0omVaLAJINTmaKG+WrJHBqvV5cj+BT9StvqdrGKaObXP5ti3L5B3TiP DrgUOnBfQbBa0UpH3mU5kpqIJQQpTeH+oHgwpCGnDBdYp5diFvA1tv/YkxnkNa87uqbCAE qRwhZb+e+JGylVlQ0fhW+zWjQX268s8= 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-486-v50qV0SgMleMRT3NQpIoWw-1; Fri, 20 Nov 2020 10:18:23 -0500 X-MC-Unique: v50qV0SgMleMRT3NQpIoWw-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id B4B59801B29; Fri, 20 Nov 2020 15:18:21 +0000 (UTC) Received: from warthog.procyon.org.uk (ovpn-112-246.rdu2.redhat.com [10.10.112.246]) by smtp.corp.redhat.com (Postfix) with ESMTP id 63E136085D; Fri, 20 Nov 2020 15:18:14 +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: [RFC PATCH 72/76] afs: Invoke fscache_resize_cookie() when handling ATTR_SIZE for setattr From: David Howells To: Trond Myklebust , Anna Schumaker , Steve French , Dominique Martinet Cc: dhowells@redhat.com, Jeff Layton , Matthew Wilcox , Alexander Viro , 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: Fri, 20 Nov 2020 15:18:13 +0000 Message-ID: <160588549356.3465195.17026181625185725385.stgit@warthog.procyon.org.uk> In-Reply-To: <160588455242.3465195.3214733858273019178.stgit@warthog.procyon.org.uk> References: <160588455242.3465195.3214733858273019178.stgit@warthog.procyon.org.uk> User-Agent: StGit/0.23 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org Invoke fscache_resize_cookie() to adjust the size of the backing cache object when setattr is called with ATTR_SIZE. This discards any data that then lies beyond the revised EOF and frees up space. Signed-off-by: David Howells --- fs/afs/inode.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/fs/afs/inode.c b/fs/afs/inode.c index 51e55bfadb54..c639de101065 100644 --- a/fs/afs/inode.c +++ b/fs/afs/inode.c @@ -847,6 +847,9 @@ static void afs_setattr_edit_file(struct afs_operation *op) if (size < i_size) truncate_pagecache(inode, size); + if (size != i_size) + fscache_resize_cookie(afs_vnode_cache(vp->vnode), + vp->scb.status.size); } } @@ -889,6 +892,8 @@ int afs_setattr(struct dentry *dentry, struct iattr *attr) attr->ia_valid &= ~ATTR_SIZE; } + fscache_use_cookie(afs_vnode_cache(vnode), true); + /* flush any dirty data outstanding on a regular file */ if (S_ISREG(vnode->vfs_inode.i_mode)) filemap_write_and_wait(vnode->vfs_inode.i_mapping); @@ -919,6 +924,7 @@ int afs_setattr(struct dentry *dentry, struct iattr *attr) out_unlock: up_write(&vnode->validate_lock); + fscache_unuse_cookie(afs_vnode_cache(vnode), NULL, NULL); _leave(" = %d", ret); return ret; }