From patchwork Fri Dec 30 11:00:02 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yongqiang Yang X-Patchwork-Id: 133665 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 A35C2B6FAF for ; Sat, 31 Dec 2011 01:41:46 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750877Ab1L3Olp (ORCPT ); Fri, 30 Dec 2011 09:41:45 -0500 Received: from mail-iy0-f174.google.com ([209.85.210.174]:41000 "EHLO mail-iy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751355Ab1L3Olo (ORCPT ); Fri, 30 Dec 2011 09:41:44 -0500 Received: by mail-iy0-f174.google.com with SMTP id h11so25397943iae.19 for ; Fri, 30 Dec 2011 06:41:44 -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=cJdPrbvUcfbgWsRd1h0RyRfeFYjV/W9aMzPrrlqGe1wWG4nSwxp1b/SEx7ovS0+PC1 D8get0OzDxRUpX94dNsQV/3IOR6CHEDXwAMq0eeIyLl78t86EptIJwbnT28zgTrqxCIR G7tFwolsZngiqomox8JZrDK5vysvU6CESwJh8= Received: by 10.50.153.234 with SMTP id vj10mr46204813igb.16.1325256104591; Fri, 30 Dec 2011 06:41:44 -0800 (PST) Received: from localhost.localdomain ([159.226.43.42]) by mx.google.com with ESMTPS id aq5sm86161462igc.5.2011.12.30.06.41.42 (version=TLSv1/SSLv3 cipher=OTHER); Fri, 30 Dec 2011 06:41:44 -0800 (PST) From: Yongqiang Yang To: tytso@mit.edu Cc: linux-ext4@vger.kernel.org, Yongqiang Yang Subject: [PATCH V6 RESEND 05/15] ext4: add a structure which will be used by 64bit-resize interface Date: Fri, 30 Dec 2011 19:00:02 +0800 Message-Id: <1325242812-27005-6-git-send-email-xiaoqiangnk@gmail.com> X-Mailer: git-send-email 1.7.5.1 In-Reply-To: <1325242812-27005-1-git-send-email-xiaoqiangnk@gmail.com> References: <1325242812-27005-1-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) {