Commit a0ad13ef authored by NeilBrown's avatar NeilBrown Committed by Linus Torvalds
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[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: default avatarGabriel Paubert <paubert@iram.es>
Signed-off-by: default avatarNeil Brown <neilb@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 45f8bde0
......@@ -990,15 +990,16 @@ encode_entry(struct readdir_cd *ccd, const char *name,
}
int
nfs3svc_encode_entry(struct readdir_cd *cd, const char *name,
int namlen, loff_t offset, ino_t ino, unsigned int d_type)
nfs3svc_encode_entry(void *cd, const char *name,
int namlen, loff_t offset, u64 ino, unsigned int d_type)
{
return encode_entry(cd, name, namlen, offset, ino, d_type, 0);
}
int
nfs3svc_encode_entry_plus(struct readdir_cd *cd, const char *name,
int namlen, loff_t offset, ino_t ino, unsigned int d_type)
nfs3svc_encode_entry_plus(void *cd, const char *name,
int namlen, loff_t offset, u64 ino,
unsigned int d_type)
{
return encode_entry(cd, name, namlen, offset, ino, d_type, 1);
}
......
......@@ -1880,9 +1880,10 @@ nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
}
static int
nfsd4_encode_dirent(struct readdir_cd *ccd, const char *name, int namlen,
loff_t offset, ino_t ino, unsigned int d_type)
nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
loff_t offset, u64 ino, unsigned int d_type)
{
struct readdir_cd *ccd = ccdv;
struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
int buflen;
__be32 *p = cd->buffer;
......
......@@ -462,9 +462,10 @@ nfssvc_encode_statfsres(struct svc_rqst *rqstp, __be32 *p,
}
int
nfssvc_encode_entry(struct readdir_cd *ccd, const char *name,
int namlen, loff_t offset, ino_t ino, unsigned int d_type)
nfssvc_encode_entry(void *ccdv, const char *name,
int namlen, loff_t offset, u64 ino, unsigned int d_type)
{
struct readdir_cd *ccd = ccdv;
struct nfsd_readdirres *cd = container_of(ccd, struct nfsd_readdirres, common);
__be32 *p = cd->buffer;
int buflen, slen;
......
......@@ -1716,7 +1716,7 @@ out:
*/
__be32
nfsd_readdir(struct svc_rqst *rqstp, struct svc_fh *fhp, loff_t *offsetp,
struct readdir_cd *cdp, encode_dent_fn func)
struct readdir_cd *cdp, filldir_t func)
{
__be32 err;
int host_err;
......@@ -1741,7 +1741,7 @@ nfsd_readdir(struct svc_rqst *rqstp, struct svc_fh *fhp, loff_t *offsetp,
do {
cdp->err = nfserr_eof; /* will be cleared on successful read */
host_err = vfs_readdir(file, (filldir_t) func, cdp);
host_err = vfs_readdir(file, func, cdp);
} while (host_err >=0 && cdp->err == nfs_ok);
if (host_err)
err = nfserrno(host_err);
......
......@@ -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 *);
......
......@@ -165,8 +165,8 @@ int nfssvc_encode_readres(struct svc_rqst *, __be32 *, struct nfsd_readres *);
int nfssvc_encode_statfsres(struct svc_rqst *, __be32 *, struct nfsd_statfsres *);
int nfssvc_encode_readdirres(struct svc_rqst *, __be32 *, struct nfsd_readdirres *);
int nfssvc_encode_entry(struct readdir_cd *, const char *name,
int namlen, loff_t offset, ino_t ino, unsigned int);
int nfssvc_encode_entry(void *, const char *name,
int namlen, loff_t offset, u64 ino, unsigned int);
int nfssvc_release_fhandle(struct svc_rqst *, __be32 *, struct nfsd_fhandle *);
......
......@@ -331,11 +331,11 @@ int nfs3svc_release_fhandle(struct svc_rqst *, __be32 *,
struct nfsd3_attrstat *);
int nfs3svc_release_fhandle2(struct svc_rqst *, __be32 *,
struct nfsd3_fhandle_pair *);
int nfs3svc_encode_entry(struct readdir_cd *, const char *name,
int namlen, loff_t offset, ino_t ino,
int nfs3svc_encode_entry(void *, const char *name,
int namlen, loff_t offset, u64 ino,
unsigned int);
int nfs3svc_encode_entry_plus(struct readdir_cd *, const char *name,
int namlen, loff_t offset, ino_t ino,
int nfs3svc_encode_entry_plus(void *, const char *name,
int namlen, loff_t offset, u64 ino,
unsigned int);
/* Helper functions for NFSv3 ACL code */
__be32 *nfs3svc_encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p,
......
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