From patchwork Wed Oct 24 02:55:34 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tao Ma X-Patchwork-Id: 193636 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 08BD12C0176 for ; Wed, 24 Oct 2012 14:04:20 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964994Ab2JXDEQ (ORCPT ); Tue, 23 Oct 2012 23:04:16 -0400 Received: from oproxy7-pub.bluehost.com ([67.222.55.9]:53305 "HELO oproxy7-pub.bluehost.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S964982Ab2JXDEL (ORCPT ); Tue, 23 Oct 2012 23:04:11 -0400 Received: (qmail 28780 invoked by uid 0); 24 Oct 2012 03:04:11 -0000 Received: from unknown (HELO box585.bluehost.com) (66.147.242.185) by oproxy7.bluehost.com with SMTP; 24 Oct 2012 03:04:11 -0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=tao.ma; s=default; h=References:In-Reply-To:Message-Id:Date:Subject:To:From; bh=EVrb7K7HlOxEWTgMlLVmrPDdWPclYMaiGdl0B9gugr8=; b=gOwo03Hywko7b/ukw8cMXboMnqzmgZSxuXlyBr86MbptBzU37VhwHDGfsMwZtsNeNmhaZRV696mAqvQwGPpCn+ivVzO0PvDd2NMJQOR2xE6VNYwnWl44Cg/9s6tEN4d7; Received: from [182.92.247.2] (port=23186 helo=tma-laptop1.taobao.ali.com) by box585.bluehost.com with esmtpsa (TLSv1:AES256-SHA:256) (Exim 4.76) (envelope-from ) id 1TQr8a-0006KI-SU for linux-ext4@vger.kernel.org; Tue, 23 Oct 2012 20:56:09 -0600 From: Tao Ma To: linux-ext4@vger.kernel.org Subject: [PATCH V7 19/23] ext4: Let fiemap work with inline data. Date: Wed, 24 Oct 2012 10:55:34 +0800 Message-Id: <1351047338-4963-19-git-send-email-tm@tao.ma> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1351047338-4963-1-git-send-email-tm@tao.ma> References: <1351047002-4723-1-git-send-email-tm@tao.ma> <1351047338-4963-1-git-send-email-tm@tao.ma> X-Identified-User: {1390:box585.bluehost.com:colyli:tao.ma} {sentby:smtp auth 182.92.247.2 authed with tm@tao.ma} Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org From: Tao Ma fiemap is used to find the disk layout of a file, as for inline data, let us just pretend like a file with just one extent. Signed-off-by: Tao Ma --- fs/ext4/extents.c | 9 +++++++++ fs/ext4/inline.c | 35 +++++++++++++++++++++++++++++++++++ fs/ext4/xattr.h | 10 ++++++++++ 3 files changed, 54 insertions(+), 0 deletions(-) diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index e750d0b..ebed7a6 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -4966,6 +4966,15 @@ int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, ext4_lblk_t start_blk; int error = 0; + if (ext4_has_inline_data(inode)) { + int has_inline = 1; + + error = ext4_inline_data_fiemap(inode, fieinfo, &has_inline); + + if (has_inline) + return error; + } + /* fallback to generic here if not in extents fmt */ if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) return generic_block_fiemap(inode, fieinfo, start, len, diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c index e01533f..dcf1f8e 100644 --- a/fs/ext4/inline.c +++ b/fs/ext4/inline.c @@ -15,6 +15,7 @@ #include "ext4.h" #include "xattr.h" #include "truncate.h" +#include #define EXT4_XATTR_SYSTEM_DATA "data" #define EXT4_MIN_INLINE_DATA_SIZE ((sizeof(__le32) * EXT4_N_BLOCKS)) @@ -1674,3 +1675,37 @@ int ext4_destroy_inline_data(handle_t *handle, struct inode *inode) return ret; } + +int ext4_inline_data_fiemap(struct inode *inode, + struct fiemap_extent_info *fieinfo, + int *has_inline) +{ + __u64 physical = 0; + __u64 length; + __u32 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_LAST; + int error = 0; + struct ext4_iloc iloc; + + down_read(&EXT4_I(inode)->xattr_sem); + if (!ext4_has_inline_data(inode)) { + *has_inline = 0; + goto out; + } + + error = ext4_get_inode_loc(inode, &iloc); + if (error) + goto out; + + physical = iloc.bh->b_blocknr << inode->i_sb->s_blocksize_bits; + physical += (char *)ext4_raw_inode(&iloc) - iloc.bh->b_data; + physical += offsetof(struct ext4_inode, i_block); + length = i_size_read(inode); + + if (physical) + error = fiemap_fill_next_extent(fieinfo, 0, physical, + length, flags); + brelse(iloc.bh); +out: + up_read(&EXT4_I(inode)->xattr_sem); + return (error < 0 ? error : 0); +} diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h index dbc014f..2e09ab2 100644 --- a/fs/ext4/xattr.h +++ b/fs/ext4/xattr.h @@ -184,6 +184,9 @@ extern int empty_inline_dir(struct inode *dir, int *has_inline_data); extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode, struct ext4_dir_entry_2 **parent_de, int *retval); +extern int ext4_inline_data_fiemap(struct inode *inode, + struct fiemap_extent_info *fieinfo, + int *has_inline); # else /* CONFIG_EXT4_FS_XATTR */ static inline int @@ -396,6 +399,13 @@ ext4_get_first_inline_block(struct inode *inode, { return NULL; } + +static inline int ext4_inline_data_fiemap(struct inode *inode, + struct fiemap_extent_info *fieinfo, + int *has_inline) +{ + return 0; +} # endif /* CONFIG_EXT4_FS_XATTR */ #ifdef CONFIG_EXT4_FS_SECURITY