| /* |
| * Copyright (c) 2008 Sun Microsystems, Inc. |
| * Written by Ricardo Correia <Ricardo.M.Correia@Sun.COM> |
| * |
| * This file is part of the SPL, Solaris Porting Layer. |
| * For details, see <http://zfsonlinux.org/>. |
| * |
| * The SPL is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the |
| * Free Software Foundation; either version 2 of the License, or (at your |
| * option) any later version. |
| * |
| * The SPL is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with the SPL. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #ifndef _SPL_RPC_XDR_H |
| #define _SPL_RPC_XDR_H |
| |
| #include <sys/types.h> |
| |
| typedef int bool_t; |
| |
| /* |
| * XDR enums and types. |
| */ |
| enum xdr_op { |
| XDR_ENCODE, |
| XDR_DECODE |
| }; |
| |
| struct xdr_ops; |
| |
| typedef struct { |
| struct xdr_ops *x_ops; /* Let caller know xdrmem_create() succeeds */ |
| caddr_t x_addr; /* Current buffer addr */ |
| caddr_t x_addr_end; /* End of the buffer */ |
| enum xdr_op x_op; /* Stream direction */ |
| } XDR; |
| |
| typedef bool_t (*xdrproc_t)(XDR *xdrs, void *ptr); |
| |
| struct xdr_ops { |
| bool_t (*xdr_control)(XDR *, int, void *); |
| |
| bool_t (*xdr_char)(XDR *, char *); |
| bool_t (*xdr_u_short)(XDR *, unsigned short *); |
| bool_t (*xdr_u_int)(XDR *, unsigned *); |
| bool_t (*xdr_u_longlong_t)(XDR *, u_longlong_t *); |
| |
| bool_t (*xdr_opaque)(XDR *, caddr_t, const uint_t); |
| bool_t (*xdr_string)(XDR *, char **, const uint_t); |
| bool_t (*xdr_array)(XDR *, caddr_t *, uint_t *, const uint_t, |
| const uint_t, const xdrproc_t); |
| }; |
| |
| /* |
| * XDR control operator. |
| */ |
| #define XDR_GET_BYTES_AVAIL 1 |
| |
| struct xdr_bytesrec { |
| bool_t xc_is_last_record; |
| size_t xc_num_avail; |
| }; |
| |
| /* |
| * XDR functions. |
| */ |
| void xdrmem_create(XDR *xdrs, const caddr_t addr, const uint_t size, |
| const enum xdr_op op); |
| |
| /* Currently not needed. If needed later, we'll add it to struct xdr_ops */ |
| #define xdr_destroy(xdrs) ((void) 0) |
| |
| #define xdr_control(xdrs, req, info) \ |
| (xdrs)->x_ops->xdr_control((xdrs), (req), (info)) |
| |
| /* |
| * For precaution, the following are defined as static inlines instead of macros |
| * to get some amount of type safety. |
| * |
| * Also, macros wouldn't work in the case where typecasting is done, because it |
| * must be possible to reference the functions' addresses by these names. |
| */ |
| static inline bool_t xdr_char(XDR *xdrs, char *cp) |
| { |
| return (xdrs->x_ops->xdr_char(xdrs, cp)); |
| } |
| |
| static inline bool_t xdr_u_short(XDR *xdrs, unsigned short *usp) |
| { |
| return (xdrs->x_ops->xdr_u_short(xdrs, usp)); |
| } |
| |
| static inline bool_t xdr_short(XDR *xdrs, short *sp) |
| { |
| BUILD_BUG_ON(sizeof (short) != 2); |
| return (xdrs->x_ops->xdr_u_short(xdrs, (unsigned short *) sp)); |
| } |
| |
| static inline bool_t xdr_u_int(XDR *xdrs, unsigned *up) |
| { |
| return (xdrs->x_ops->xdr_u_int(xdrs, up)); |
| } |
| |
| static inline bool_t xdr_int(XDR *xdrs, int *ip) |
| { |
| BUILD_BUG_ON(sizeof (int) != 4); |
| return (xdrs->x_ops->xdr_u_int(xdrs, (unsigned *)ip)); |
| } |
| |
| static inline bool_t xdr_u_longlong_t(XDR *xdrs, u_longlong_t *ullp) |
| { |
| return (xdrs->x_ops->xdr_u_longlong_t(xdrs, ullp)); |
| } |
| |
| static inline bool_t xdr_longlong_t(XDR *xdrs, longlong_t *llp) |
| { |
| BUILD_BUG_ON(sizeof (longlong_t) != 8); |
| return (xdrs->x_ops->xdr_u_longlong_t(xdrs, (u_longlong_t *)llp)); |
| } |
| |
| /* |
| * Fixed-length opaque data. |
| */ |
| static inline bool_t xdr_opaque(XDR *xdrs, caddr_t cp, const uint_t cnt) |
| { |
| return (xdrs->x_ops->xdr_opaque(xdrs, cp, cnt)); |
| } |
| |
| /* |
| * Variable-length string. |
| * The *sp buffer must have (maxsize + 1) bytes. |
| */ |
| static inline bool_t xdr_string(XDR *xdrs, char **sp, const uint_t maxsize) |
| { |
| return (xdrs->x_ops->xdr_string(xdrs, sp, maxsize)); |
| } |
| |
| /* |
| * Variable-length arrays. |
| */ |
| static inline bool_t xdr_array(XDR *xdrs, caddr_t *arrp, uint_t *sizep, |
| const uint_t maxsize, const uint_t elsize, const xdrproc_t elproc) |
| { |
| return xdrs->x_ops->xdr_array(xdrs, arrp, sizep, maxsize, elsize, |
| elproc); |
| } |
| |
| #endif /* SPL_RPC_XDR_H */ |