nfs4xdr.c

	status = decode_op_hdr(xdr, OP_READDIR);
	if (status)
		return status;
	READ_BUF(8);
	COPYMEM(readdir->verifier.data, 8);

	hdrlen = (char *) p - (char *) iov->iov_base;
	recvd = rcvbuf->len - hdrlen;
	if (pglen > recvd)
		pglen = recvd;
	xdr_read_pages(xdr, pglen);

	BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
	kaddr = p = (uint32_t *) kmap_atomic(page, KM_USER0);
	end = (uint32_t *) ((char *)p + pglen + readdir->pgbase);
	entry = p;
	for (nr = 0; *p++; nr++) {
		if (p + 3 > end)
			goto short_pkt;
		p += 2;			/* cookie */
		len = ntohl(*p++);	/* filename length */
		if (len > NFS4_MAXNAMLEN) {
			printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
			goto err_unmap;
		}
		p += XDR_QUADLEN(len);
		if (p + 1 > end)
			goto short_pkt;
		len = ntohl(*p++);	/* bitmap length */
		p += len;
		if (p + 1 > end)
			goto short_pkt;
		attrlen = XDR_QUADLEN(ntohl(*p++));
		p += attrlen;		/* attributes */
		if (p + 2 > end)
			goto short_pkt;
		entry = p;
	}
	if (!nr && (entry[0] != 0 || entry[1] == 0))
		goto short_pkt;
out:	
	kunmap_atomic(kaddr, KM_USER0);
	return 0;
short_pkt:
	entry[0] = entry[1] = 0;
	/* truncate listing ? */
	if (!nr) {
		printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
		entry[1] = 1;
	}
	goto out;
err_unmap:
	kunmap_atomic(kaddr, KM_USER0);
	return -errno_NFSERR_IO;
}

static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
{
	struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
	struct kvec *iov = rcvbuf->head;
	int hdrlen, len, recvd;
	uint32_t *p;
	char *kaddr;
	int status;

	status = decode_op_hdr(xdr, OP_READLINK);
	if (status)
		return status;

	/* Convert length of symlink */
	READ_BUF(4);
	READ32(len);
	if (len >= rcvbuf->page_len || len <= 0) {
		dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
		return -ENAMETOOLONG;
	}
	hdrlen = (char *) xdr->p - (char *) iov->iov_base;
	recvd = req->rq_rcv_buf.len - hdrlen;
	if (recvd < len) {
		printk(KERN_WARNING "NFS: server cheating in readlink reply: "
				"count %u > recvd %u\n", len, recvd);
		return -EIO;
	}
	xdr_read_pages(xdr, len);
	/*
	 * The XDR encode routine has set things up so that
	 * the link text will be copied directly into the
	 * buffer.  We just have to do overflow-checking,
	 * and and null-terminate the text (the VFS expects
	 * null-termination).
	 */
	kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
	kaddr[len+rcvbuf->page_base] = '\0';
	kunmap_atomic(kaddr, KM_USER0);
	return 0;
}

static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
	int status;

	status = decode_op_hdr(xdr, OP_REMOVE);
	if (status)
		goto out;
	status = decode_change_info(xdr, cinfo);
out:
	return status;
}

static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
	      struct nfs4_change_info *new_cinfo)
{
	int status;

	status = decode_op_hdr(xdr, OP_RENAME);
	if (status)
		goto out;
	if ((status = decode_change_info(xdr, old_cinfo)))
		goto out;
	status = decode_change_info(xdr, new_cinfo);
out:
	return status;
}

static int decode_renew(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_RENEW);
}

static int
decode_savefh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_SAVEFH);
}

static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
{
	uint32_t *p;
	uint32_t bmlen;
	int status;

        
	status = decode_op_hdr(xdr, OP_SETATTR);
	if (status)
		return status;
	READ_BUF(4);
	READ32(bmlen);
	READ_BUF(bmlen << 2);
	return 0;
}

static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_client *clp)
{
	uint32_t *p;
	uint32_t opnum;
	int32_t nfserr;

	READ_BUF(8);
	READ32(opnum);
	if (opnum != OP_SETCLIENTID) {
		printk(KERN_NOTICE
				"nfs4_decode_setclientid: Server returned operation"
			       	" %d\n", opnum);
		return -EIO;
	}
	READ32(nfserr);
	if (nfserr == NFS_OK) {
		READ_BUF(8 + sizeof(clp->cl_confirm.data));
		READ64(clp->cl_clientid);
		COPYMEM(clp->cl_confirm.data, sizeof(clp->cl_confirm.data));
	} else if (nfserr == NFSERR_CLID_INUSE) {
		uint32_t len;

		/* skip netid string */
		READ_BUF(4);
		READ32(len);
		READ_BUF(len);

		/* skip uaddr string */
		READ_BUF(4);
		READ32(len);
		READ_BUF(len);
		return -NFSERR_CLID_INUSE;
	} else
		return -nfs_stat_to_errno(nfserr);

	return 0;
}

static int decode_setclientid_confirm(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
}

static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
{
	uint32_t *p;
	int status;

	status = decode_op_hdr(xdr, OP_WRITE);
	if (status)
		return status;

	READ_BUF(16);
	READ32(res->count);
	READ32(res->verf->committed);
	COPYMEM(res->verf->verifier, 8);
	return 0;
}

static int decode_delegreturn(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_DELEGRETURN);
}

/*
 * Decode OPEN_DOWNGRADE response
 */
static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
{
        struct xdr_stream xdr;
        struct compound_hdr hdr;
        int status;

        xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
        status = decode_compound_hdr(&xdr, &hdr);
        if (status)
                goto out;
        status = decode_putfh(&xdr);
        if (status)
                goto out;
        status = decode_open_downgrade(&xdr, res);
out:
        return status;
}

/*
 * END OF "GENERIC" DECODE ROUTINES.
 */

/*
 * Decode ACCESS response
 */
static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_accessres *res)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
	
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
	if ((status = decode_putfh(&xdr)) == 0)
		status = decode_access(&xdr, res);
out:
	return status;
}

/*
 * Decode LOOKUP response
 */
static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
	
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
	if ((status = decode_lookup(&xdr)) != 0)
		goto out;
	if ((status = decode_getfh(&xdr, res->fh)) != 0)
		goto out;
	status = decode_getfattr(&xdr, res->fattr, res->server);
out:
	return status;
}

/*
 * Decode LOOKUP_ROOT response
 */
static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
	
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
	if ((status = decode_putrootfh(&xdr)) != 0)
		goto out;
	if ((status = decode_getfh(&xdr, res->fh)) == 0)
		status = decode_getfattr(&xdr, res->fattr, res->server);
out:
	return status;
}

/*
 * Decode REMOVE response
 */
static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_change_info *cinfo)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
	
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
	if ((status = decode_putfh(&xdr)) == 0)
		status = decode_remove(&xdr, cinfo);
out:
	return status;
}

/*
 * Decode RENAME response
 */
static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_rename_res *res)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
	
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
	if ((status = decode_savefh(&xdr)) != 0)
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
	status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo);
out:
	return status;
}

/*
 * Decode LINK response
 */
static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_change_info *cinfo)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
	
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
	if ((status = decode_savefh(&xdr)) != 0)
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
	status = decode_link(&xdr, cinfo);
out:
	return status;
}

/*
 * Decode CREATE response
 */
static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
	
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
	if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
		goto out;
	if ((status = decode_getfh(&xdr, res->fh)) != 0)
		goto out;
	status = decode_getfattr(&xdr, res->fattr, res->server);
	if (status == NFS4ERR_DELAY)
		status = 0;
out:
	return status;
}

/*
 * Decode SYMLINK response
 */
static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
{
	return nfs4_xdr_dec_create(rqstp, p, res);
}

/*
 * Decode GETATTR response
 */
static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_getattr_res *res)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
	
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_getfattr(&xdr, res->fattr, res->server);
out:
	return status;

}


/*
 * Decode CLOSE response
 */
static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
{
        struct xdr_stream xdr;
        struct compound_hdr hdr;
        int status;

        xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
        status = decode_compound_hdr(&xdr, &hdr);
        if (status)
                goto out;
        status = decode_putfh(&xdr);
        if (status)
                goto out;
        status = decode_close(&xdr, res);
out:
        return status;
}

/*
 * Decode OPEN response
 */
static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
{
        struct xdr_stream xdr;
        struct compound_hdr hdr;
        int status;

        xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
        status = decode_compound_hdr(&xdr, &hdr);
        if (status)
                goto out;
        status = decode_putfh(&xdr);
        if (status)
                goto out;
        status = decode_open(&xdr, res);
        if (status)
                goto out;
	status = decode_getfh(&xdr, &res->fh);
        if (status)
		goto out;
	status = decode_getfattr(&xdr, res->f_attr, res->server);
	if (status == NFS4ERR_DELAY)
		status = 0;
out:
        return status;
}

/*
 * Decode OPEN_CONFIRM response
 */
static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_open_confirmres *res)
{
        struct xdr_stream xdr;
        struct compound_hdr hdr;
        int status;

        xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
        status = decode_compound_hdr(&xdr, &hdr);
        if (status)
                goto out;
        status = decode_putfh(&xdr);
        if (status)
                goto out;
        status = decode_open_confirm(&xdr, res);
out:
        return status;
}

/*
 * Decode OPEN response
 */
static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
{
        struct xdr_stream xdr;
        struct compound_hdr hdr;
        int status;

        xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
        status = decode_compound_hdr(&xdr, &hdr);
        if (status)
                goto out;
        status = decode_putfh(&xdr);
        if (status)
                goto out;
        status = decode_open(&xdr, res);
out:
        return status;
}

/*
 * Decode SETATTR response
 */
static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_setattrres *res)
{
        struct xdr_stream xdr;
        struct compound_hdr hdr;
        int status;

        xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
        status = decode_compound_hdr(&xdr, &hdr);
        if (status)
                goto out;
        status = decode_putfh(&xdr);
        if (status)
                goto out;
        status = decode_setattr(&xdr, res);
        if (status)
                goto out;
	status = decode_getfattr(&xdr, res->fattr, res->server);
	if (status == NFS4ERR_DELAY)
		status = 0;
out:
        return status;
}

/*
 * Decode LOCK response
 */
static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_lock(&xdr, res);
out:
	return status;
}

/*
 * Decode LOCKT response
 */
static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_lockt(&xdr, res);
out:
	return status;
}

/*
 * Decode LOCKU response
 */
static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_locku(&xdr, res);
out:
	return status;
}

/*
 * Decode READLINK response
 */
static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, uint32_t *p, void *res)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_readlink(&xdr, rqstp);
out:
	return status;
}

/*
 * Decode READDIR response
 */
static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_readdir_res *res)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_readdir(&xdr, rqstp, res);
out:
	return status;
}

/*
 * Decode Read response
 */
static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_readres *res)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_read(&xdr, rqstp, res);
	if (!status)
		status = res->count;
out:
	return status;
}

/*
 * Decode WRITE response
 */
static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_write(&xdr, res);
	if (!status)
		status = res->count;
out:
	return status;
}

/*
 * Decode COMMIT response
 */
static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_commit(&xdr, res);
out:
	return status;
}

/*
 * FSINFO request
 */
static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (!status)
		status = decode_putfh(&xdr);
	if (!status)
		status = decode_fsinfo(&xdr, fsinfo);
	if (!status)
		status = -nfs_stat_to_errno(hdr.status);
	return status;
}

/*
 * PATHCONF request
 */
static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, uint32_t *p, struct nfs_pathconf *pathconf)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (!status)
		status = decode_putfh(&xdr);
	if (!status)
		status = decode_pathconf(&xdr, pathconf);
	return status;
}

/*
 * STATFS request
 */
static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, uint32_t *p, struct nfs_fsstat *fsstat)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (!status)
		status = decode_putfh(&xdr);
	if (!status)
		status = decode_statfs(&xdr, fsstat);
	return status;
}

/*
 * GETATTR_BITMAP request
 */
static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, uint32_t *p, struct nfs4_server_caps_res *res)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
	status = decode_server_caps(&xdr, res);
out:
	return status;
}

/*
 * Decode RENEW response
 */
static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (!status)
		status = decode_renew(&xdr);
	return status;
}

/*
 * a SETCLIENTID request
 */
static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, uint32_t *p,
		struct nfs4_client *clp)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (!status)
		status = decode_setclientid(&xdr, clp);
	if (!status)
		status = -nfs_stat_to_errno(hdr.status);
	return status;
}

/*
 * a SETCLIENTID_CONFIRM request
 */
static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (!status)
		status = decode_setclientid_confirm(&xdr);
	if (!status)
		status = decode_putrootfh(&xdr);
	if (!status)
		status = decode_fsinfo(&xdr, fsinfo);
	if (!status)
		status = -nfs_stat_to_errno(hdr.status);
	return status;
}

/*
 * DELEGRETURN request
 */
static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status == 0) {
		status = decode_putfh(&xdr);
		if (status == 0)
			status = decode_delegreturn(&xdr);
	}
	return status;
}

uint32_t *nfs4_decode_dirent(uint32_t *p, struct nfs_entry *entry, int plus)
{
	uint32_t bitmap[2] = {0};
	uint32_t len;

	if (!*p++) {
		if (!*p)
			return ERR_PTR(-EAGAIN);
		entry->eof = 1;
		return ERR_PTR(-EBADCOOKIE);
	}

	entry->prev_cookie = entry->cookie;
	p = xdr_decode_hyper(p, &entry->cookie);
	entry->len = ntohl(*p++);
	entry->name = (const char *) p;
	p += XDR_QUADLEN(entry->len);

	/*
	 * In case the server doesn't return an inode number,
	 * we fake one here.  (We don't use inode number 0,
	 * since glibc seems to choke on it...)
	 */
	entry->ino = 1;

	len = ntohl(*p++);		/* bitmap length */
	if (len-- > 0) {
		bitmap[0] = ntohl(*p++);
		if (len-- > 0) {
			bitmap[1] = ntohl(*p++);
			p += len;
		}
	}
	len = XDR_QUADLEN(ntohl(*p++));	/* attribute buffer length */
	if (len > 0) {
		if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
			xdr_decode_hyper(p, &entry->ino);
		else if (bitmap[0] == FATTR4_WORD0_FILEID)
			xdr_decode_hyper(p, &entry->ino);
		p += len;
	}

	entry->eof = !p[0] && p[1];
	return p;
}

/*
 * We need to translate between nfs status return values and
 * the local errno values which may not be the same.
 */
static struct {
	int stat;
	int errno;
} nfs_errtbl[] = {
	{ NFS4_OK,		0		},
	{ NFS4ERR_PERM,		EPERM		},
	{ NFS4ERR_NOENT,	ENOENT		},
	{ NFS4ERR_IO,		errno_NFSERR_IO	},
	{ NFS4ERR_NXIO,		ENXIO		},
	{ NFS4ERR_ACCESS,	EACCES		},
	{ NFS4ERR_EXIST,	EEXIST		},
	{ NFS4ERR_XDEV,		EXDEV		},
	{ NFS4ERR_NOTDIR,	ENOTDIR		},
	{ NFS4ERR_ISDIR,	EISDIR		},
	{ NFS4ERR_INVAL,	EINVAL		},
	{ NFS4ERR_FBIG,		EFBIG		},
	{ NFS4ERR_NOSPC,	ENOSPC		},
	{ NFS4ERR_ROFS,		EROFS		},
	{ NFS4ERR_MLINK,	EMLINK		},
	{ NFS4ERR_NAMETOOLONG,	ENAMETOOLONG	},
	{ NFS4ERR_NOTEMPTY,	ENOTEMPTY	},
	{ NFS4ERR_DQUOT,	EDQUOT		},
	{ NFS4ERR_STALE,	ESTALE		},
	{ NFS4ERR_BADHANDLE,	EBADHANDLE	},
	{ NFS4ERR_BAD_COOKIE,	EBADCOOKIE	},
	{ NFS4ERR_NOTSUPP,	ENOTSUPP	},
	{ NFS4ERR_TOOSMALL,	ETOOSMALL	},
	{ NFS4ERR_SERVERFAULT,	ESERVERFAULT	},
	{ NFS4ERR_BADTYPE,	EBADTYPE	},
	{ NFS4ERR_LOCKED,	EAGAIN		},
	{ NFS4ERR_RESOURCE,	EREMOTEIO	},
	{ NFS4ERR_SYMLINK,	ELOOP		},
	{ NFS4ERR_OP_ILLEGAL,	EOPNOTSUPP	},
	{ NFS4ERR_DEADLOCK,	EDEADLK		},
	{ NFS4ERR_WRONGSEC,	EPERM		}, /* FIXME: this needs
						    * to be handled by a
						    * middle-layer.
						    */
	{ -1,			EIO		}
};

/*
 * Convert an NFS error code to a local one.
 * This one is used jointly by NFSv2 and NFSv3.
 */
static int
nfs_stat_to_errno(int stat)
{
	int i;
	for (i = 0; nfs_errtbl[i].stat != -1; i++) {
		if (nfs_errtbl[i].stat == stat)
			return nfs_errtbl[i].errno;
	}
	if (stat <= 10000 || stat > 10100) {
		/* The server is looney tunes. */
		return ESERVERFAULT;
	}
	/* If we cannot translate the error, the recovery routines should
	 * handle it.
	 * Note: remaining NFSv4 error codes have values > 10000, so should
	 * not conflict with native Linux error codes.
	 */
	return stat;
}

#ifndef MAX
# define MAX(a, b)	(((a) > (b))? (a) : (b))
#endif

#define PROC(proc, argtype, restype)				\
[NFSPROC4_CLNT_##proc] = {					\
	.p_proc   = NFSPROC4_COMPOUND,				\
	.p_encode = (kxdrproc_t) nfs4_xdr_##argtype,		\
	.p_decode = (kxdrproc_t) nfs4_xdr_##restype,		\
	.p_bufsiz = MAX(NFS4_##argtype##_sz,NFS4_##restype##_sz) << 2,	\
    }

struct rpc_procinfo	nfs4_procedures[] = {
  PROC(READ,		enc_read,	dec_read),
  PROC(WRITE,		enc_write,	dec_write),
  PROC(COMMIT,		enc_commit,	dec_commit),
  PROC(OPEN,		enc_open,	dec_open),
  PROC(OPEN_CONFIRM,	enc_open_confirm,	dec_open_confirm),
  PROC(OPEN_NOATTR,	enc_open_noattr,	dec_open_noattr),
  PROC(OPEN_DOWNGRADE,	enc_open_downgrade,	dec_open_downgrade),
  PROC(CLOSE,		enc_close,	dec_close),
  PROC(SETATTR,		enc_setattr,	dec_setattr),
  PROC(FSINFO,		enc_fsinfo,	dec_fsinfo),