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Commit c065eeea authored by Trond Myklebust's avatar Trond Myklebust Committed by Anna Schumaker
Browse files

NFSv4: Replace callback string decode function with a generic 



Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
Reviewed-by: default avatarChuck Lever <chuck.lever@oracle.com>
Signed-off-by: default avatarAnna Schumaker <Anna.Schumaker@Netapp.com>
parent 6da59ce2

fs/nfs/callback_xdr.c

+8 −22
Original line number Diff line number Diff line
@@ -83,23 +83,15 @@ static __be32 *read_buf(struct xdr_stream *xdr, size_t nbytes) 
	return p;

}



static __be32 decode_string(struct xdr_stream *xdr, unsigned int *len, const char **str)

static __be32 decode_string(struct xdr_stream *xdr, unsigned int *len,

		const char **str, size_t maxlen)

{

	__be32 *p;



	p = read_buf(xdr, 4);

	if (unlikely(p == NULL))

		return htonl(NFS4ERR_RESOURCE);

	*len = ntohl(*p);



	if (*len != 0) {

		p = read_buf(xdr, *len);

		if (unlikely(p == NULL))

			return htonl(NFS4ERR_RESOURCE);

		*str = (const char *)p;

	} else

		*str = NULL;

	ssize_t err;



	err = xdr_stream_decode_opaque_inline(xdr, (void **)str, maxlen);

	if (err < 0)

		return cpu_to_be32(NFS4ERR_RESOURCE);

	*len = err;

	return 0;

}
@@ -162,15 +154,9 @@ static __be32 decode_compound_hdr_arg(struct xdr_stream *xdr, struct cb_compound 
	__be32 *p;

	__be32 status;



	status = decode_string(xdr, &hdr->taglen, &hdr->tag);

	status = decode_string(xdr, &hdr->taglen, &hdr->tag, CB_OP_TAGLEN_MAXSZ);

	if (unlikely(status != 0))

		return status;

	/* We do not like overly long tags! */

	if (hdr->taglen > CB_OP_TAGLEN_MAXSZ) {

		printk("NFS: NFSv4 CALLBACK %s: client sent tag of length %u\n",

				__func__, hdr->taglen);

		return htonl(NFS4ERR_RESOURCE);

	}

	p = read_buf(xdr, 12);

	if (unlikely(p == NULL))

		return htonl(NFS4ERR_RESOURCE);