From 3ebf44902f77537b5784eb5059c2b78d8b5a920a Mon Sep 17 00:00:00 2001 From: Steven Whitehouse Date: Tue, 10 Jul 2007 12:28:27 +0100 Subject: [PATCH] [GFS2] Accept old format NFS filehandles On Tue, 2007-07-10 at 10:06 +0100, Christoph Hellwig wrote: > > -#define GFS2_LARGE_FH_SIZE 10 > > - > > -struct gfs2_fh_obj { > > - struct gfs2_inum_host this; > > - u32 imode; > > -}; > > +#define GFS2_LARGE_FH_SIZE 8 > > Because gfs2_decode_fh only accepts file handles with GFS2_LARGE_FH_SIZE > or GFS2_LARGE_FH_SIZE you don't accept filehandles sent out by and older > gfs version anymore. Stale filehandles because of a new kernel version > are a big no-no, so please add back code to handle the old filehandles > on the decode side. > This should fix that problem I think since its only relating to end of the fh we can just ignore that field in order to accept the older format. Signed-off-by: Steven Whitehouse Cc: Christoph Hellwig Cc: Wendy Cheng --- fs/gfs2/ops_export.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/gfs2/ops_export.c b/fs/gfs2/ops_export.c index e317db2..99ea565 100644 --- a/fs/gfs2/ops_export.c +++ b/fs/gfs2/ops_export.c @@ -28,6 +28,7 @@ #define GFS2_SMALL_FH_SIZE 4 #define GFS2_LARGE_FH_SIZE 8 +#define GFS2_OLD_FH_SIZE 10 static struct dentry *gfs2_decode_fh(struct super_block *sb, __u32 *p, @@ -44,6 +45,7 @@ static struct dentry *gfs2_decode_fh(struct super_block *sb, switch (fh_len) { case GFS2_LARGE_FH_SIZE: + case GFS2_OLD_FH_SIZE: parent.no_formal_ino = ((u64)be32_to_cpu(fh[4])) << 32; parent.no_formal_ino |= be32_to_cpu(fh[5]); parent.no_addr = ((u64)be32_to_cpu(fh[6])) << 32; -- 2.7.4