From patchwork Fri Dec 23 08:14:55 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yongqiang Yang X-Patchwork-Id: 132999 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id A493DB7002 for ; Fri, 23 Dec 2011 22:53:09 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756735Ab1LWLxI (ORCPT ); Fri, 23 Dec 2011 06:53:08 -0500 Received: from mail-iy0-f174.google.com ([209.85.210.174]:47423 "EHLO mail-iy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756755Ab1LWLxG (ORCPT ); Fri, 23 Dec 2011 06:53:06 -0500 Received: by mail-iy0-f174.google.com with SMTP id h11so15005525iae.19 for ; Fri, 23 Dec 2011 03:53:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; bh=65Os/3iuTNE39Ir/N9ESDeRK5TFmgdEr8NbVD25Vjkk=; b=A77pHKk4XDJG/FLGNqX0qbnSXnPIIVUpeJKvHcngCg4UbuzSK1LI1GbpN7txGaDGlW fBPaTxXrMi8oiNm/Ac1rzYlA4h+7uTZeK3WJlRzIRt3q3yncsjFnVEem0BmulBSVCmn4 GC3oOT75TvhO/XEJ2lViepR6ecM8uKbesmUEk= Received: by 10.50.88.170 with SMTP id bh10mr13309253igb.8.1324641186348; Fri, 23 Dec 2011 03:53:06 -0800 (PST) Received: from localhost.localdomain ([159.226.43.42]) by mx.google.com with ESMTPS id i2sm9968543igq.6.2011.12.23.03.53.04 (version=TLSv1/SSLv3 cipher=OTHER); Fri, 23 Dec 2011 03:53:05 -0800 (PST) From: Yongqiang Yang To: linux-ext4@vger.kernel.org Cc: tytso@mit.edu, Yongqiang Yang Subject: [PATCH v5 05/15] ext4: add a structure which will be used by 64bit-resize interface Date: Fri, 23 Dec 2011 16:14:55 +0800 Message-Id: <1324628105-32559-6-git-send-email-xiaoqiangnk@gmail.com> X-Mailer: git-send-email 1.7.5.1 In-Reply-To: <1324628105-32559-1-git-send-email-xiaoqiangnk@gmail.com> References: <1324628105-32559-1-git-send-email-xiaoqiangnk@gmail.com> Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org From: Yongqiang Yang This patch adds a structure which will be used by 64bit-resize interface. Two functions which allocate and destroy the structure respectively are added. Signed-off-by: Yongqiang Yang Signed-off-by: "Theodore Ts'o" --- fs/ext4/resize.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 55 insertions(+), 0 deletions(-) diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c index 859b63f..78f3bab 100644 --- a/fs/ext4/resize.c +++ b/fs/ext4/resize.c @@ -134,6 +134,61 @@ static int verify_group_input(struct super_block *sb, return err; } +/* + * ext4_new_flex_group_data is used by 64bit-resize interface to add a flex + * group each time. + */ +struct ext4_new_flex_group_data { + struct ext4_new_group_data *groups; /* new_group_data for groups + in the flex group */ + __u16 *bg_flags; /* block group flags of groups + in @groups */ + ext4_group_t count; /* number of groups in @groups + */ +}; + +/* + * alloc_flex_gd() allocates a ext4_new_flex_group_data with size of + * @flexbg_size. + * + * Returns NULL on failure otherwise address of the allocated structure. + */ +static struct ext4_new_flex_group_data *alloc_flex_gd(unsigned long flexbg_size) +{ + struct ext4_new_flex_group_data *flex_gd; + + flex_gd = kmalloc(sizeof(*flex_gd), GFP_NOFS); + if (flex_gd == NULL) + goto out3; + + flex_gd->count = flexbg_size; + + flex_gd->groups = kmalloc(sizeof(struct ext4_new_group_data) * + flexbg_size, GFP_NOFS); + if (flex_gd->groups == NULL) + goto out2; + + flex_gd->bg_flags = kmalloc(flexbg_size * sizeof(__u16), GFP_NOFS); + if (flex_gd->bg_flags == NULL) + goto out1; + + return flex_gd; + +out1: + kfree(flex_gd->groups); +out2: + kfree(flex_gd); +out3: + return NULL; +} + +void free_flex_gd(struct ext4_new_flex_group_data *flex_gd) +{ + kfree(flex_gd->bg_flags); + kfree(flex_gd->groups); + kfree(flex_gd); +} + static struct buffer_head *bclean(handle_t *handle, struct super_block *sb, ext4_fsblk_t blk) {