[Ocfs2-devel] [PATCH] ocfs2: return f_fsid info in ocfs2_statfs(), v2
Coly Li
coly.li at suse.de
Thu Jan 15 11:20:12 PST 2009
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 <coly.li at suse.de>
---
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..fdab98a 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] = 0;
brelse(bh);
--
Coly Li
SuSE Labs
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