[Cluster-devel] [GFS2 patch] NFS filehandle check

[Wendy Cheng]

File handle checking error found in '07 NFS connectathon. The fh_type
and fh_len are not necessarily identical. Some of the client machines
could fail mount with stale filehandle without this patch. 

Signed-off-by: S. Wendy Cheng <wcheng at redhat.com>

 ops_export.c |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

--- linux-git/fs/gfs2/ops_export.c	2007-02-06 01:07:26.000000000 -0500
+++ linux/fs/gfs2/ops_export.c	2007-02-06 18:10:08.000000000 -0500
@@ -39,14 +39,15 @@ static struct dentry *gfs2_decode_fh(str
 	struct gfs2_fh_obj fh_obj;
 	struct gfs2_inum_host *this, parent;
 
-	if (fh_type != fh_len)
-		return NULL;
-
 	this 		= &fh_obj.this;
 	fh_obj.imode 	= DT_UNKNOWN;
 	memset(&parent, 0, sizeof(struct gfs2_inum));
 
-	switch (fh_type) {
+	if (fh_type != fh_len) {
+                printk("warning: fh_type=%d != fh_len=%d\n", fh_type,
fh_len);
+        }
+
+	switch (fh_len) {
 	case GFS2_LARGE_FH_SIZE:
 		parent.no_formal_ino = ((u64)be32_to_cpu(fh[4])) << 32;
 		parent.no_formal_ino |= be32_to_cpu(fh[5]);