Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757292Ab3FCKFL (ORCPT ); Mon, 3 Jun 2013 06:05:11 -0400 Received: from mga14.intel.com ([143.182.124.37]:31689 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757143Ab3FCKFE (ORCPT ); Mon, 3 Jun 2013 06:05:04 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.87,791,1363158000"; d="scan'208";a="249941810" From: Huajun Li To: jaegeuk.kim@samsung.com, linux-fsdevel@vger.kernel.org, huajun.li.lee@gmail.com Cc: namjae.jeon@samsung.com, linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, Huajun Li , Haicheng Li Subject: [RFC 3/5] f2fs: Key functions to handle inline data Date: Mon, 3 Jun 2013 18:04:12 +0800 Message-Id: <1370253854-15084-4-git-send-email-huajun.li@intel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1370253854-15084-1-git-send-email-huajun.li@intel.com> References: <1370253854-15084-1-git-send-email-huajun.li@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4465 Lines: 176 Functions to implement inline data read/write, and move inline data to normal data block when file size exceeds inline data limitation. Signed-off-by: Huajun Li Signed-off-by: Haicheng Li --- fs/f2fs/inline.c | 152 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 152 insertions(+) create mode 100644 fs/f2fs/inline.c diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c new file mode 100644 index 0000000..a2aa056 --- /dev/null +++ b/fs/f2fs/inline.c @@ -0,0 +1,152 @@ +/* + * fs/f2fs/inline.c + * + * Copyright (c) 2013, Intel Corporation. + * Authors: + * Huajun Li + * Haicheng Li + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include +#include + +#include "f2fs.h" + +void f2fs_clear_inode_inline_flag(struct f2fs_inode *raw_inode) +{ + raw_inode->i_reserved &= ~F2FS_INODE_INLINE_DATA; +} + +void f2fs_set_inode_inline_flag(struct f2fs_inode *raw_inode) +{ + raw_inode->i_reserved |= F2FS_INODE_INLINE_DATA; +} + +int f2fs_inline_data_attempt(struct inode *inode) +{ + return is_inode_dyn_flag_set(F2FS_I(inode), F2FS_INLINE_DATA_ATTEMPT); +} + +int f2fs_has_inline_data(struct inode *inode) +{ + return is_inode_dyn_flag_set(F2FS_I(inode), F2FS_INLINE_DATA_FL); +} + +static int f2fs_read_inline_data(struct inode *inode, struct page *page) +{ + void *src_addr, *dst_addr; + loff_t size = i_size_read(inode); + struct page *ipage = get_node_page(F2FS_SB(inode->i_sb), inode->i_ino); + + if (IS_ERR(ipage)) + return PTR_ERR(ipage); + + src_addr = page_address(ipage); + dst_addr = page_address(page); + + memcpy(dst_addr, src_addr + INLINE_DATA_OFFSET, size); + zero_user_segment(page, INLINE_DATA_OFFSET + size, PAGE_CACHE_SIZE); + SetPageUptodate(page); + + f2fs_put_page(ipage, 1); + + return 0; +} + +int f2fs_read_inline_data_page(struct inode *inode, struct page *page) +{ + int ret = 0; + + if (!page->index) { + ret = f2fs_read_inline_data(inode, page); + } else if (!PageUptodate(page)) { + zero_user_segment(page, 0, PAGE_CACHE_SIZE); + SetPageUptodate(page); + } + + unlock_page(page); + + return ret; +} + +int f2fs_convert_inline_data(struct page *p, + struct inode *inode, unsigned flags) +{ + int err; + int ilock; + loff_t size; + struct page *page, *ipage; + void *src_addr, *dst_addr; + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + + if (!p->index) + page = p; + else + page = grab_cache_page_write_begin(inode->i_mapping, 0, flags); + + if (IS_ERR(page)) + return PTR_ERR(page); + + ipage = get_node_page(sbi, inode->i_ino); + if (IS_ERR(ipage)) { + f2fs_put_page(page, 1); + return PTR_ERR(ipage); + } + + src_addr = page_address(ipage); + dst_addr = page_address(page); + + size = i_size_read(inode); + memcpy(dst_addr, src_addr + INLINE_DATA_OFFSET, size); + zero_user_segment(ipage, INLINE_DATA_OFFSET, + INLINE_DATA_OFFSET + MAX_INLINE_DATA); + clear_inode_dyn_flag(F2FS_I(inode), F2FS_INLINE_DATA_FL); + set_page_dirty(ipage); + f2fs_put_page(ipage, 1); + + if (!p->index) { + SetPageUptodate(page); + } else { + ilock = mutex_lock_op(sbi); + err = f2fs_reserve_block(inode, 0); + if (err) + goto err; + mutex_unlock_op(sbi, ilock); + + set_page_dirty(page); + f2fs_put_page(page, 1); + } + + return 0; + +err: + mutex_unlock_op(sbi, ilock); + f2fs_put_page(page, 1); + return err; +} + +int f2fs_write_inline_data(struct inode *inode, + struct page *page, unsigned size) +{ + void *src_addr, *dst_addr; + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + struct page *ipage = get_node_page(sbi, inode->i_ino); + + if (IS_ERR(ipage)) + return PTR_ERR(ipage); + + src_addr = page_address(page); + dst_addr = page_address(ipage); + + memcpy(dst_addr + INLINE_DATA_OFFSET, src_addr, size); + clear_inode_dyn_flag(F2FS_I(inode), F2FS_INLINE_DATA_ATTEMPT); + if (!f2fs_has_inline_data(inode)) + set_inode_dyn_flag(F2FS_I(inode), F2FS_INLINE_DATA_FL); + set_page_dirty(ipage); + f2fs_put_page(ipage, 1); + + return 0; +} -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/