xdr.h
上传用户:lgb322
上传日期:2013-02-24
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文件大小:3k
- /*
- * 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);
- /*
- * pre-xdr'ed macros.
- */
- #define xdr_zero __constant_htonl(0)
- #define xdr_one __constant_htonl(1)
- #define xdr_two __constant_htonl(2)
- #define rpc_success __constant_htonl(RPC_SUCCESS)
- #define rpc_prog_unavail __constant_htonl(RPC_PROG_UNAVAIL)
- #define rpc_prog_mismatch __constant_htonl(RPC_PROG_MISMATCH)
- #define rpc_proc_unavail __constant_htonl(RPC_PROC_UNAVAIL)
- #define rpc_garbage_args __constant_htonl(RPC_GARBAGE_ARGS)
- #define rpc_system_err __constant_htonl(RPC_SYSTEM_ERR)
- #define rpc_auth_ok __constant_htonl(RPC_AUTH_OK)
- #define rpc_autherr_badcred __constant_htonl(RPC_AUTH_BADCRED)
- #define rpc_autherr_rejectedcred __constant_htonl(RPC_AUTH_REJECTEDCRED)
- #define rpc_autherr_badverf __constant_htonl(RPC_AUTH_BADVERF)
- #define rpc_autherr_rejectedverf __constant_htonl(RPC_AUTH_REJECTEDVERF)
- #define rpc_autherr_tooweak __constant_htonl(RPC_AUTH_TOOWEAK)
- /*
- * Miscellaneous XDR helper functions
- */
- u32 * xdr_encode_array(u32 *p, const char *s, unsigned int len);
- u32 * xdr_encode_string(u32 *p, const char *s);
- u32 * xdr_decode_string(u32 *p, char **sp, int *lenp, int maxlen);
- u32 * xdr_decode_string_inplace(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);
- }
- void xdr_shift_iovec(struct iovec *, int, size_t);
- void xdr_zero_iovec(struct iovec *, int, size_t);
- #endif /* __KERNEL__ */
- #endif /* _SUNRPC_XDR_H_ */