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/*
* include/linux/sunrpc/xdr.h
*
* Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
*/
#ifndef _SUNRPC_XDR_H_
#define _SUNRPC_XDR_H_
#ifdef __KERNEL__
#include <linux/uio.h>
/*
* Buffer adjustment
*/
#define XDR_QUADLEN(l) (((l) + 3) >> 2)
/*
* Generic opaque `network object.' At the kernel level, this type
* is used only by lockd.
*/
#define XDR_MAX_NETOBJ 1024
struct xdr_netobj {
unsigned int len;
u8 * data;
};
/*
* This is the generic XDR function. rqstp is either a rpc_rqst (client
* side) or svc_rqst pointer (server side).
* Encode functions always assume there's enough room in the buffer.
*/
typedef int (*kxdrproc_t)(void *rqstp, u32 *data, void *obj);
/*
* These variables contain pre-xdr'ed values for faster operation.
* FIXME: should be replaced by macros for big-endian machines.
*/
extern u32 xdr_zero, xdr_one, xdr_two;
extern u32 rpc_success,
rpc_prog_unavail,
rpc_prog_mismatch,
rpc_proc_unavail,
rpc_garbage_args,
rpc_system_err;
extern u32 rpc_auth_ok,
rpc_autherr_badcred,
rpc_autherr_rejectedcred,
rpc_autherr_badverf,
rpc_autherr_rejectedverf,
rpc_autherr_tooweak,
rpc_autherr_dropit;
void xdr_init(void);
/*
* Miscellaneous XDR helper functions
*/
u32 * xdr_encode_string(u32 *p, const char *s);
u32 * xdr_decode_string(u32 *p, char **sp, int *lenp, int maxlen);
u32 * xdr_encode_netobj(u32 *p, const struct xdr_netobj *);
u32 * xdr_decode_netobj(u32 *p, struct xdr_netobj *);
u32 * xdr_decode_netobj_fixed(u32 *p, void *obj, unsigned int len);
/*
* Decode 64bit quantities (NFSv3 support)
*/
static inline u32 *
xdr_encode_hyper(u32 *p, __u64 val)
{
*p++ = htonl(val >> 32);
*p++ = htonl(val & 0xFFFFFFFF);
return p;
}
static inline u32 *
xdr_decode_hyper(u32 *p, __u64 *valp)
{
*valp = ((__u64) ntohl(*p++)) << 32;
*valp |= ntohl(*p++);
return p;
}
/*
* Adjust iovec to reflect end of xdr'ed data (RPC client XDR)
*/
static inline int
xdr_adjust_iovec(struct iovec *iov, u32 *p)
{
return iov->iov_len = ((u8 *) p - (u8 *) iov->iov_base);
}
#endif /* __KERNEL__ */
#endif /* _SUNRPC_XDR_H_ */
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