From mboxrd@z Thu Jan 1 00:00:00 1970 From: Coly Li Date: Fri, 16 Jan 2009 04:02:57 +0800 Subject: [Ocfs2-devel] [PATCH] ocfs2: return f_fsid info in ocfs2_statfs(), v3 Message-ID: <496F9671.2080901@suse.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: ocfs2-devel@oss.oracle.com Currently f_fsid of struct kstatfs returned from ocfs2_statfs() is undefined (vfs layer fills 0 as default). Since in some conditions, f_fsid value might be used as (f_fsid, ino) pair to uniquely identify a file, ocfs2 should return a unique defined f_fsid value from ocfs2_statfs(). This patch uses uuid_hash as a unique ID to initiate f_fsid value. The 32bits width is enough for ocfs2 membership so far. Signed-off-by: Coly Li Cc: Sunil Mushran --- fs/ocfs2/super.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c index 43ed113..db837ee 100644 --- a/fs/ocfs2/super.c +++ b/fs/ocfs2/super.c @@ -1425,6 +1425,8 @@ static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) buf->f_bavail = buf->f_bfree; buf->f_files = numbits; buf->f_ffree = freebits; + buf->f_fsid.val[0] = osb->uuid_hash & 0xFFFFFFFFUL; + buf->f_fsid.val[1] = (osb->uuid_hash >> 32) & 0xFFFFFFFFUL; brelse(bh); -- Coly Li SuSE Labs