From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752083AbbEBAtZ (ORCPT ); Fri, 1 May 2015 20:49:25 -0400 Received: from mail.kernel.org ([198.145.29.136]:50621 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751686AbbEBAtK (ORCPT ); Fri, 1 May 2015 20:49:10 -0400 From: Jaegeuk Kim To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net Cc: Jaegeuk Kim Subject: [PATCH 04/19] f2fs: add feature facility in superblock Date: Fri, 1 May 2015 17:48:31 -0700 Message-Id: <1430527726-68547-4-git-send-email-jaegeuk@kernel.org> X-Mailer: git-send-email 2.1.1 In-Reply-To: <1430527726-68547-1-git-send-email-jaegeuk@kernel.org> References: <1430527726-68547-1-git-send-email-jaegeuk@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch introduces a feature in superblock, which will indicate any new features for f2fs. Signed-off-by: Jaegeuk Kim --- fs/f2fs/f2fs.h | 7 +++++++ include/linux/f2fs_fs.h | 3 ++- 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index cd9748a..e1dd986 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -70,6 +70,13 @@ struct f2fs_mount_info { unsigned int opt; }; +#define F2FS_HAS_FEATURE(sb, mask) \ + ((F2FS_SB(sb)->raw_super->feature & cpu_to_le32(mask)) != 0) +#define F2FS_SET_FEATURE(sb, mask) \ + F2FS_SB(sb)->raw_super->feature |= cpu_to_le32(mask) +#define F2FS_CLEAR_FEATURE(sb, mask) \ + F2FS_SB(sb)->raw_super->feature &= ~cpu_to_le32(mask) + #define CRCPOLY_LE 0xedb88320 static inline __u32 f2fs_crc32(void *buf, size_t len) diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h index 8d345c2..d44e97f 100644 --- a/include/linux/f2fs_fs.h +++ b/include/linux/f2fs_fs.h @@ -90,7 +90,8 @@ struct f2fs_super_block { __le32 cp_payload; __u8 version[VERSION_LEN]; /* the kernel version */ __u8 init_version[VERSION_LEN]; /* the initial kernel version */ - __u8 reserved[892]; /* valid reserved region */ + __le32 feature; /* defined features */ + __u8 reserved[888]; /* valid reserved region */ } __packed; /* -- 2.1.1