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4b393c50 | 1 | /* |
f48b6193 | 2 | * Copyright (c) 2008 Sun Microsystems, Inc. |
716154c5 | 3 | * Written by Ricardo Correia <Ricardo.M.Correia@Sun.COM> |
f48b6193 | 4 | * |
716154c5 | 5 | * This file is part of the SPL, Solaris Porting Layer. |
3d6af2dd | 6 | * For details, see <http://zfsonlinux.org/>. |
f48b6193 | 7 | * |
716154c5 BB |
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. | |
12 | * | |
13 | * The SPL is distributed in the hope that it will be useful, but WITHOUT | |
f48b6193 RC |
14 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
15 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | * for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License along | |
716154c5 | 19 | * with the SPL. If not, see <http://www.gnu.org/licenses/>. |
4b393c50 | 20 | */ |
f48b6193 | 21 | |
dbb484ec | 22 | #ifndef _SPL_RPC_XDR_H |
23 | #define _SPL_RPC_XDR_H | |
24 | ||
f48b6193 RC |
25 | #include <sys/types.h> |
26 | #include <rpc/types.h> | |
27 | ||
28 | /* | |
29 | * XDR enums and types. | |
30 | */ | |
31 | enum xdr_op { | |
32 | XDR_ENCODE, | |
33 | XDR_DECODE | |
34 | }; | |
35 | ||
36 | struct xdr_ops; | |
37 | ||
38 | typedef struct { | |
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 */ | |
44 | } XDR; | |
45 | ||
46 | typedef bool_t (*xdrproc_t)(XDR *xdrs, void *ptr); | |
47 | ||
48 | struct xdr_ops { | |
49 | bool_t (*xdr_control)(XDR *, int, void *); | |
50 | ||
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 *); | |
55 | ||
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); | |
60 | }; | |
61 | ||
62 | /* | |
63 | * XDR control operator. | |
64 | */ | |
65 | #define XDR_GET_BYTES_AVAIL 1 | |
66 | ||
67 | struct xdr_bytesrec { | |
68 | bool_t xc_is_last_record; | |
69 | size_t xc_num_avail; | |
70 | }; | |
71 | ||
f48b6193 RC |
72 | /* |
73 | * XDR functions. | |
74 | */ | |
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 */ | |
79 | ||
80 | #define xdr_control(xdrs, req, info) (xdrs)->x_ops->xdr_control((xdrs), \ | |
81 | (req), (info)) | |
82 | ||
83 | /* | |
84 | * For precaution, the following are defined as static inlines instead of macros | |
85 | * to get some amount of type safety. | |
86 | * | |
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. | |
89 | */ | |
90 | static inline bool_t xdr_char(XDR *xdrs, char *cp) | |
91 | { | |
92 | return xdrs->x_ops->xdr_char(xdrs, cp); | |
93 | } | |
94 | ||
95 | static inline bool_t xdr_u_short(XDR *xdrs, unsigned short *usp) | |
96 | { | |
97 | return xdrs->x_ops->xdr_u_short(xdrs, usp); | |
98 | } | |
99 | ||
100 | static inline bool_t xdr_short(XDR *xdrs, short *sp) | |
101 | { | |
102 | BUILD_BUG_ON(sizeof(short) != 2); | |
103 | return xdrs->x_ops->xdr_u_short(xdrs, (unsigned short *) sp); | |
104 | } | |
105 | ||
106 | static inline bool_t xdr_u_int(XDR *xdrs, unsigned *up) | |
107 | { | |
108 | return xdrs->x_ops->xdr_u_int(xdrs, up); | |
109 | } | |
110 | ||
111 | static inline bool_t xdr_int(XDR *xdrs, int *ip) | |
112 | { | |
113 | BUILD_BUG_ON(sizeof(int) != 4); | |
114 | return xdrs->x_ops->xdr_u_int(xdrs, (unsigned *) ip); | |
115 | } | |
116 | ||
117 | static inline bool_t xdr_u_longlong_t(XDR *xdrs, u_longlong_t *ullp) | |
118 | { | |
119 | return xdrs->x_ops->xdr_u_longlong_t(xdrs, ullp); | |
120 | } | |
121 | ||
122 | static inline bool_t xdr_longlong_t(XDR *xdrs, longlong_t *llp) | |
123 | { | |
124 | BUILD_BUG_ON(sizeof(longlong_t) != 8); | |
125 | return xdrs->x_ops->xdr_u_longlong_t(xdrs, (u_longlong_t *) llp); | |
126 | } | |
127 | ||
128 | /* | |
129 | * Fixed-length opaque data. | |
130 | */ | |
131 | static inline bool_t xdr_opaque(XDR *xdrs, caddr_t cp, const uint_t cnt) | |
132 | { | |
133 | return xdrs->x_ops->xdr_opaque(xdrs, cp, cnt); | |
134 | } | |
135 | ||
136 | /* | |
137 | * Variable-length string. | |
138 | * The *sp buffer must have (maxsize + 1) bytes. | |
139 | */ | |
140 | static inline bool_t xdr_string(XDR *xdrs, char **sp, const uint_t maxsize) | |
141 | { | |
142 | return xdrs->x_ops->xdr_string(xdrs, sp, maxsize); | |
143 | } | |
144 | ||
145 | /* | |
146 | * Variable-length arrays. | |
147 | */ | |
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) | |
150 | { | |
151 | return xdrs->x_ops->xdr_array(xdrs, arrp, sizep, maxsize, elsize, | |
152 | elproc); | |
153 | } | |
dbb484ec | 154 | |
155 | #endif /* SPL_RPC_XDR_H */ |