Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754618AbZC0Ilr (ORCPT ); Fri, 27 Mar 2009 04:41:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751743AbZC0Ilg (ORCPT ); Fri, 27 Mar 2009 04:41:36 -0400 Received: from cantor.suse.de ([195.135.220.2]:49961 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750719AbZC0Ile (ORCPT ); Fri, 27 Mar 2009 04:41:34 -0400 Message-ID: <49CC926D.7030101@suse.de> Date: Fri, 27 Mar 2009 16:46:37 +0800 From: Coly Li Reply-To: coly.li@suse.de Organization: SuSE Labs User-Agent: Thunderbird 2.0.0.19 (X11/20081227) MIME-Version: 1.0 To: LKML Cc: Randy Dunlap , Andrew Morton , reiserfs-devel@vger.kernel.org Subject: [PATCH] fs/reiserfs: return f_fsid for statfs(2), v3 X-Enigmail-Version: 0.95.7 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2176 Lines: 63 This patch makes reiserfs3 return f_fsid info for statfs(2). By Andreas' suggestion, this patch populates a persistent f_fsid between boots/mounts with help of on-disk uuid record. Randy Dunlap reported a compiling error from v2 patch like: fs/built-in.o: In function `reiserfs_statfs': super.c:(.text+0x7332b): undefined reference to `crc32_le' super.c:(.text+0x7333f): undefined reference to `crc32_le' Also he provided helpful solution to fix this error. The modification of v3 patch is based on Randy's suggestion, add 'select CRC32' in fs/reiserfs/Kconfig. Signed-off-by: Coly Li Cc: Randy Dunlap Cc: Andrew Morton Cc: reiserfs-devel@vger.kernel.org --- fs/reiserfs/Kconfig | 1 + fs/reiserfs/super.c | 5 +++++ 2 files changed, 6 insertions(+), 0 deletions(-) diff --git a/fs/reiserfs/Kconfig b/fs/reiserfs/Kconfig index 949b8c6..513f431 100644 --- a/fs/reiserfs/Kconfig +++ b/fs/reiserfs/Kconfig @@ -1,5 +1,6 @@ config REISERFS_FS tristate "Reiserfs support" + select CRC32 help Stores not just filenames but the files themselves in a balanced tree. Uses journalling. diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c index f3c820b..cb8e7ee 100644 --- a/fs/reiserfs/super.c +++ b/fs/reiserfs/super.c @@ -27,6 +27,7 @@ #include #include #include +#include struct file_system_type reiserfs_fs_type; @@ -1892,6 +1893,10 @@ static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf) buf->f_bsize = dentry->d_sb->s_blocksize; /* changed to accommodate gcc folks. */ buf->f_type = REISERFS_SUPER_MAGIC; + buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2); + buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2, + sizeof(rs->s_uuid)/2); + return 0; } -- Coly Li SuSE Labs -- 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/