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2 * Copyright (c) 2008 Sun Microsystems, Inc.
3 * Written by Ricardo Correia <Ricardo.M.Correia@Sun.COM>
5 * This file is part of the SPL, Solaris Porting Layer.
6 * For details, see <http://zfsonlinux.org/>.
8 * The SPL is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
13 * The SPL is distributed in the hope that it will be useful, but WITHOUT
14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 * You should have received a copy of the GNU General Public License along
19 * with the SPL. If not, see <http://www.gnu.org/licenses/>.
22 #ifndef _SPL_RPC_XDR_H
23 #define _SPL_RPC_XDR_H
25 #include <sys/types.h>
26 #include <rpc/types.h>
29 * XDR enums and types.
39 struct xdr_ops
*x_ops
; /* Also used to let caller know if
40 xdrmem_create() succeeds (sigh..) */
41 caddr_t x_addr
; /* Current buffer addr */
42 caddr_t x_addr_end
; /* End of the buffer */
43 enum xdr_op x_op
; /* Stream direction */
46 typedef bool_t (*xdrproc_t
)(XDR
*xdrs
, void *ptr
);
49 bool_t (*xdr_control
)(XDR
*, int, void *);
51 bool_t (*xdr_char
)(XDR
*, char *);
52 bool_t (*xdr_u_short
)(XDR
*, unsigned short *);
53 bool_t (*xdr_u_int
)(XDR
*, unsigned *);
54 bool_t (*xdr_u_longlong_t
)(XDR
*, u_longlong_t
*);
56 bool_t (*xdr_opaque
)(XDR
*, caddr_t
, const uint_t
);
57 bool_t (*xdr_string
)(XDR
*, char **, const uint_t
);
58 bool_t (*xdr_array
)(XDR
*, caddr_t
*, uint_t
*, const uint_t
,
59 const uint_t
, const xdrproc_t
);
63 * XDR control operator.
65 #define XDR_GET_BYTES_AVAIL 1
68 bool_t xc_is_last_record
;
75 void xdrmem_create(XDR
*xdrs
, const caddr_t addr
, const uint_t size
,
76 const enum xdr_op op
);
77 #define xdr_destroy(xdrs) ((void) 0) /* Currently not needed. If needed later,
78 we'll add it to struct xdr_ops */
80 #define xdr_control(xdrs, req, info) (xdrs)->x_ops->xdr_control((xdrs), \
84 * For precaution, the following are defined as static inlines instead of macros
85 * to get some amount of type safety.
87 * Also, macros wouldn't work in the case where typecasting is done, because it
88 * must be possible to reference the functions' addresses by these names.
90 static inline bool_t
xdr_char(XDR
*xdrs
, char *cp
)
92 return xdrs
->x_ops
->xdr_char(xdrs
, cp
);
95 static inline bool_t
xdr_u_short(XDR
*xdrs
, unsigned short *usp
)
97 return xdrs
->x_ops
->xdr_u_short(xdrs
, usp
);
100 static inline bool_t
xdr_short(XDR
*xdrs
, short *sp
)
102 BUILD_BUG_ON(sizeof(short) != 2);
103 return xdrs
->x_ops
->xdr_u_short(xdrs
, (unsigned short *) sp
);
106 static inline bool_t
xdr_u_int(XDR
*xdrs
, unsigned *up
)
108 return xdrs
->x_ops
->xdr_u_int(xdrs
, up
);
111 static inline bool_t
xdr_int(XDR
*xdrs
, int *ip
)
113 BUILD_BUG_ON(sizeof(int) != 4);
114 return xdrs
->x_ops
->xdr_u_int(xdrs
, (unsigned *) ip
);
117 static inline bool_t
xdr_u_longlong_t(XDR
*xdrs
, u_longlong_t
*ullp
)
119 return xdrs
->x_ops
->xdr_u_longlong_t(xdrs
, ullp
);
122 static inline bool_t
xdr_longlong_t(XDR
*xdrs
, longlong_t
*llp
)
124 BUILD_BUG_ON(sizeof(longlong_t
) != 8);
125 return xdrs
->x_ops
->xdr_u_longlong_t(xdrs
, (u_longlong_t
*) llp
);
129 * Fixed-length opaque data.
131 static inline bool_t
xdr_opaque(XDR
*xdrs
, caddr_t cp
, const uint_t cnt
)
133 return xdrs
->x_ops
->xdr_opaque(xdrs
, cp
, cnt
);
137 * Variable-length string.
138 * The *sp buffer must have (maxsize + 1) bytes.
140 static inline bool_t
xdr_string(XDR
*xdrs
, char **sp
, const uint_t maxsize
)
142 return xdrs
->x_ops
->xdr_string(xdrs
, sp
, maxsize
);
146 * Variable-length arrays.
148 static inline bool_t
xdr_array(XDR
*xdrs
, caddr_t
*arrp
, uint_t
*sizep
,
149 const uint_t maxsize
, const uint_t elsize
, const xdrproc_t elproc
)
151 return xdrs
->x_ops
->xdr_array(xdrs
, arrp
, sizep
, maxsize
, elsize
,
155 #endif /* SPL_RPC_XDR_H */