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authorSteven Whitehouse <swhiteho@redhat.com>2007-07-10 07:28:27 -0400
committerSteven Whitehouse <swhiteho@redhat.com>2007-07-10 07:28:27 -0400
commit3ebf44902f77537b5784eb5059c2b78d8b5a920a (patch)
tree77290d029e6652ed09bb23c05b8b203bc569cd69 /fs/gfs2
parenta0a24741cac414aba5918e9939afafa70c37f952 (diff)
[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 <swhiteho@redhat.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Wendy Cheng <wcheng@redhat.com>
Diffstat (limited to 'fs/gfs2')
-rw-r--r--fs/gfs2/ops_export.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/gfs2/ops_export.c b/fs/gfs2/ops_export.c
index e317db2a5548..99ea5659bc2c 100644
--- a/fs/gfs2/ops_export.c
+++ b/fs/gfs2/ops_export.c
@@ -28,6 +28,7 @@
28 28
29#define GFS2_SMALL_FH_SIZE 4 29#define GFS2_SMALL_FH_SIZE 4
30#define GFS2_LARGE_FH_SIZE 8 30#define GFS2_LARGE_FH_SIZE 8
31#define GFS2_OLD_FH_SIZE 10
31 32
32static struct dentry *gfs2_decode_fh(struct super_block *sb, 33static struct dentry *gfs2_decode_fh(struct super_block *sb,
33 __u32 *p, 34 __u32 *p,
@@ -44,6 +45,7 @@ static struct dentry *gfs2_decode_fh(struct super_block *sb,
44 45
45 switch (fh_len) { 46 switch (fh_len) {
46 case GFS2_LARGE_FH_SIZE: 47 case GFS2_LARGE_FH_SIZE:
48 case GFS2_OLD_FH_SIZE:
47 parent.no_formal_ino = ((u64)be32_to_cpu(fh[4])) << 32; 49 parent.no_formal_ino = ((u64)be32_to_cpu(fh[4])) << 32;
48 parent.no_formal_ino |= be32_to_cpu(fh[5]); 50 parent.no_formal_ino |= be32_to_cpu(fh[5]);
49 parent.no_addr = ((u64)be32_to_cpu(fh[6])) << 32; 51 parent.no_addr = ((u64)be32_to_cpu(fh[6])) << 32;