[PATCH] knfsd: Fix type mismatch with filldir_t used by nfsd

nfsd defines a type 'encode_dent_fn' which is much like 'filldir_t' except
that the first pointer is 'struct readdir_cd *' rather than 'void *'.  It
then casts encode_dent_fn points to 'filldir_t' as needed.  This hides any
other type mismatches between the two such as the fact that the 'ino' arg
recently changed from ino_t to u64.

So: get rid of 'encode_dent_fn', get rid of the cast of the function type,
change the first arg of various functions from 'struct readdir_cd *' to
'void *', and live with the fact that we have a little less type checking
on the calling of these functions now.  Less internal (to nfsd) checking
offset by more external checking, which is more important.

Thanks to Gabriel Paubert <paubert@iram.es> for discovering this and
providing an initial patch.

Signed-off-by: Gabriel Paubert <paubert@iram.es>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 3 deletions

diff --git a/include/linux/nfsd/nfsd.h b/include/linux/nfsd/nfsd.h
index 0727774772ba..4b7c4b568f6d 100644
--- a/include/linux/nfsd/nfsd.h
+++ b/include/linux/nfsd/nfsd.h
@@ -52,8 +52,6 @@
 struct readdir_cd {
         __be32                  err;    /* 0, nfserr, or nfserr_eof */
 };
-typedef int             (*encode_dent_fn)(struct readdir_cd *, const char *,
-                                                int, loff_t, ino_t, unsigned int);
 typedef int (*nfsd_dirop_t)(struct inode *, struct dentry *, int, int);
 
 extern struct svc_program       nfsd_program;
@@ -117,7 +115,7 @@ __be32		nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type,
 int             nfsd_truncate(struct svc_rqst *, struct svc_fh *,
                                 unsigned long size);
 __be32          nfsd_readdir(struct svc_rqst *, struct svc_fh *,
-                             loff_t *, struct readdir_cd *, encode_dent_fn);
+                             loff_t *, struct readdir_cd *, filldir_t);
 __be32          nfsd_statfs(struct svc_rqst *, struct svc_fh *,
                                 struct kstatfs *);