use $(LIBENSCVECTOR) instead of libensc_vector.a
[util-vserver.git] / util-vserver / lib / vserver-internal.h
1 // $Id$    --*- c++ -*--
2
3 // Copyright (C) 2003 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
4 //  
5 // This program is free software; you can redistribute it and/or modify
6 // it under the terms of the GNU General Public License as published by
7 // the Free Software Foundation; version 2 of the License.
8 //  
9 // This program is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 // GNU General Public License for more details.
13 //  
14 // You should have received a copy of the GNU General Public License
15 // along with this program; if not, write to the Free Software
16 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17
18 #ifdef H_VSERVER_SYSCALL_INTERNAL_H
19 #  error vserver-internal.h must not be included more than once
20 #endif
21
22 #ifndef H_VSERVER_SYSCALL_INTERNAL_H
23 #define H_VSERVER_SYSCALL_INTERNAL_H
24
25 #include <asm/unistd.h>
26 #include <syscall.h>
27 #include <errno.h>
28 #include <stdint.h>
29 #include <sys/syscall.h>
30 #include <unistd.h>
31
32 #include "internal.h"
33
34 #if !defined(__NR_vserver) && defined(ENSC_SYSCALL__NR_vserver)
35 #  define __NR_vserver  ENSC_SYSCALL__NR_vserver
36 #endif
37
38 inline static ALWAYSINLINE void vc_noop0() {}
39
40 #define VC_PREFIX       0)
41 #define VC_SUFFIX       else (void)(vc_noop0()
42 #define CALL_VC_NOOP    vc_noop0()
43 #define CALL_VC_GENERAL(ID, SUFFIX, FUNC, ...)                          \
44   VC_PREFIX; VC_SELECT(ID) return FUNC ## _ ## SUFFIX(__VA_ARGS__); VC_SUFFIX
45
46 #ifdef VC_MULTIVERSION_SYSCALL
47 #  define VC_SELECT(ID) if (ver>=(ID))
48 #  define CALL_VC(...)                                  \
49   do {                                                  \
50     int ver = utilvserver_checkCompatVersion();         \
51     if (ver==-1) return -1;                             \
52     VC_SUFFIX, __VA_ARGS__, VC_PREFIX;                  \
53     errno = ENOSYS;                                     \
54     return -1;                                          \
55   } while (0)
56 #else
57 #  define VC_SELECT(ID) if (1)
58 #  define CALL_VC(...)                                  \
59   do {                                                  \
60     if (1) {} VC_SUFFIX, __VA_ARGS__, VC_PREFIX;        \
61     errno = ENOSYS; return -1;                          \
62   } while (0)
63 #endif
64
65 #ifdef VC_ENABLE_API_COMPAT
66 #  define CALL_VC_COMPAT(F,...) CALL_VC_GENERAL(0x00010000, compat, F, __VA_ARGS__)
67 #else
68 #  define CALL_VC_COMPAT(F,...) CALL_VC_NOOP
69 #endif
70
71 #ifdef VC_ENABLE_API_LEGACY
72 #  define CALL_VC_LEGACY(F,...) CALL_VC_GENERAL(0x00000000, legacy, F, __VA_ARGS__)
73 #else
74 #  define CALL_VC_LEGACY(F,...) CALL_VC_NOOP
75 #endif
76
77 #ifdef VC_ENABLE_API_V11
78 #  define CALL_VC_V11(F,...)    CALL_VC_GENERAL(0x00010000, v11, F, __VA_ARGS__)
79 #else
80 #  define CALL_VC_V11(F,...)    CALL_VC_NOOP
81 #endif
82
83 #ifdef VC_ENABLE_API_V13
84 #  define CALL_VC_V13(F,...)    CALL_VC_GENERAL(0x00010011, v13, F, __VA_ARGS__)
85 #else
86 #  define CALL_VC_V13(F,...)    CALL_VC_NOOP
87 #endif
88
89 #ifdef VC_ENABLE_API_V13
90 #  define CALL_VC_V13A(F,...)   CALL_VC_GENERAL(0x00010012, v13, F, __VA_ARGS__)
91 #else
92 #  define CALL_VC_V13A(F,...)   CALL_VC_NOOP
93 #endif
94
95 #ifdef VC_ENABLE_API_V13
96 #  define CALL_VC_V13B(F,...)   CALL_VC_GENERAL(0x00010021, v13b, F, __VA_ARGS__)
97 #else
98 #  define CALL_VC_V13B(F,...)   CALL_VC_NOOP
99 #endif
100
101 #ifdef VC_ENABLE_API_V13
102 #  define CALL_VC_V13OBS(F,...) CALL_VC_GENERAL(0x00010011, v13obs, F, __VA_ARGS__)
103 #else
104 #  define CALL_VC_V13OBS(F,...) CALL_VC_NOOP
105 #endif
106
107
108 #ifdef VC_ENABLE_API_NET
109 #  define CALL_VC_NET(F,...)    CALL_VC_GENERAL(0x00010016, net, F, __VA_ARGS__)
110 #else
111 #  define CALL_VC_NET(F,...)    CALL_VC_NOOP
112 #endif
113
114 #ifdef VC_ENABLE_API_FSCOMPAT
115 #  define CALL_VC_FSCOMPAT(F,...)       CALL_VC_GENERAL(0x00010000, fscompat, F, __VA_ARGS__)
116 #else
117 #  define CALL_VC_FSCOMPAT(F,...)       CALL_VC_NOOP
118 #endif
119
120 #ifdef VC_ENABLE_API_OLDPROC
121 #  define CALL_VC_OLDPROC(F,...)        CALL_VC_GENERAL(0x00000000, oldproc, F, __VA_ARGS__)
122 #else
123 #  define CALL_VC_OLDPROC(F,...)        CALL_VC_NOOP
124 #endif
125
126 #ifdef VC_ENABLE_API_OLDUTS
127 #  define CALL_VC_OLDUTS(F,...)         CALL_VC_GENERAL(0x00000000, olduts, F, __VA_ARGS__)
128 #else
129 #  define CALL_VC_OLDUTS(F,...)         CALL_VC_NOOP
130 #endif
131
132
133   // Some  kernel <-> userspace wrappers; they should be noops in most cases
134
135 #if 1
136 #  define CTX_KERNEL2USER(X)    (((X)==(uint32_t)(-1)) ? VC_NOCTX   : \
137                                  ((X)==(uint32_t)(-2)) ? VC_SAMECTX : \
138                                  (xid_t)(X))
139
140 #  define CTX_USER2KERNEL(X)    (((X)==VC_DYNAMIC_XID) ? (uint32_t)(-1) : \
141                                  ((X)==VC_SAMECTX)     ? (uint32_t)(-2) : \
142                                  (uint32_t)(X))
143 #else
144 #  define CTX_USER2KERNEL(X)    (X)
145 #  define CTX_KERNEL2USER(X)    (X)
146 #endif
147
148 #if 1
149 #  define EXT2FLAGS_USER2KERNEL(X)      (((X) & ~(VC_IMMUTABLE_FILE_FL|VC_IMMUTABLE_LINK_FL)) | \
150                                          ((X) & VC_IMMUTABLE_FILE_FL ? EXT2_IMMUTABLE_FILE_FL : 0) | \
151                                          ((X) & VC_IMMUTABLE_LINK_FL ? EXT2_IMMUTABLE_LINK_FL : 0))
152 #  define EXT2FLAGS_KERNEL2USER(X)      (((X) & ~(EXT2_IMMUTABLE_FILE_FL|EXT2_IMMUTABLE_LINK_FL)) | \
153                                          ((X) & EXT2_IMMUTABLE_FILE_FL ? VC_IMMUTABLE_FILE_FL : 0) | \
154                                          ((X) & EXT2_IMMUTABLE_LINK_FL ? VC_IMMUTABLE_LINK_FL : 0))
155 #else
156 #  define EXT2FLAGS_KERNEL2USER(X)      (X)
157 #  define EXT2FLAGS_USER2KERNEL(X)      (X)
158 #endif
159
160 #if 1
161 #  define VHI_USER2KERNEL(X)            ((((X)==vcVHI_CONTEXT)    ? VHIN_CONTEXT    : \
162                                           ((X)==vcVHI_SYSNAME)    ? VHIN_SYSNAME    : \
163                                           ((X)==vcVHI_NODENAME)   ? VHIN_NODENAME   : \
164                                           ((X)==vcVHI_RELEASE)    ? VHIN_RELEASE    : \
165                                           ((X)==vcVHI_VERSION)    ? VHIN_VERSION    : \
166                                           ((X)==vcVHI_MACHINE)    ? VHIN_MACHINE    : \
167                                           ((X)==vcVHI_DOMAINNAME) ? VHIN_DOMAINNAME : \
168                                           (X)))
169 #  define VHI_KERNEL2USER(X)            ((((X)==VHIN_CONTEXT)     ? vcVHI_CONTEXT    : \
170                                           ((X)==VHIN_SYSNAME)     ? vcVHI_SYSNAME    : \
171                                           ((X)==VHIN_NODENAME)    ? vcVHI_NODENAME   : \
172                                           ((X)==VHIN_RELEASE)     ? vcVHI_RELEASE    : \
173                                           ((X)==VHIN_VERSION)     ? vcVHI_VERSION    : \
174                                           ((X)==VHIN_MACHINE)     ? vcVHI_MACHINE    : \
175                                           ((X)==VHIN_DOMAINNAME)  ? vcVHI_DOMAINNAME : \
176                                           (X)))
177 #else
178 #  define VHI_USER2KERNEL(X)            (X)
179 #  define VHI_KERNEL2USER(X)            (X)
180 #endif
181
182 #if 1
183 #  define NID_KERNEL2USER(X)    (((X)==(uint32_t)(-1)) ? VC_NONID   : \
184                                  (xid_t)(X))
185
186 #  define NID_USER2KERNEL(X)    (((X)==VC_DYNAMIC_NID) ? (uint32_t)(-1) : \
187                                  (uint32_t)(X))
188 #else
189 #  define NID_USER2KERNEL(X)    (X)
190 #  define NID_KERNEL2USER(X)    (X)
191 #endif
192
193 #if 1
194 #  define NETTYPE_USER2KERNEL(X)        ((X)==vcNET_IPV4   ? 0 : \
195                                          (X)==vcNET_IPV6   ? 1 : \
196                                          (X)==vcNET_IPV4R  ? 2 : \
197                                          (X)==vcNET_IPV6R  ? 3 : \
198                                          (X))
199 #  define NETTYPE_KERNEL2USER(X)        ((X)==0 ? vcNET_IPV4   ? : \
200                                          (X)==1 ? vcNET_IPV6   ? : \
201                                          (X)==2 ? vcNET_IPV4R  ? : \
202                                          (X)==3 ? vcNET_IPV6R  ? : \
203                                          (vc_net_nx_type)(X))
204 #else
205 #  define NETTYPE_USER2KERNEL(X)        (X)
206 #  define NETTYPE_KERNEL2USER(X)        (X)
207 #endif
208
209 #define CDLIM_USER2KERNEL(X)            ((X)==VC_CDLIM_UNSET    ? CDLIM_UNSET    : \
210                                          (X)==VC_CDLIM_INFINITY ? CDLIM_INFINITY : \
211                                          (X)==VC_CDLIM_KEEP     ? CDLIM_KEEP     : \
212                                          (X))
213
214   /// the __typeof__ thing is a hack to deal with the kernel interface
215   /// using an unsigned long long value for a uint32_t type
216 #define CDLIM_KERNEL2USER(X)            ((X)==(__typeof__(X))CDLIM_UNSET       ? VC_CDLIM_UNSET    : \
217                                          (X)==(__typeof__(X))CDLIM_INFINITY    ? VC_CDLIM_INFINITY : \
218                                          (X)==(__typeof__(X))CDLIM_KEEP        ? VC_CDLIM_KEEP     : \
219                                          (X))
220
221
222 #define ENSC_STRUCT_IDX(STRUCT,ATTR)                    \
223   ((char*)(&(STRUCT).ATTR) - (char*)(&(STRUCT)))
224 #define ENSC_SAME_STRUCT_IDX(LHS,RHS,ATTR)                      \
225   (ENSC_STRUCT_IDX(LHS,ATTR) == ENSC_STRUCT_IDX(RHS,ATTR))
226 #define ENSC_SAME_STRUCT_ITEM(LHS,RHS,ATTR)     \
227   (ENSC_SAME_STRUCT_IDX(LHS,RHS,ATTR) &&        \
228    sizeof((LHS).ATTR)==sizeof((RHS).ATTR) &&    \
229    sizeof(LHS)==sizeof(RHS))
230
231 #define EXT2_IOC_GETCONTEXT             _IOR('x', 1, long)
232 #define EXT2_IOC_SETCONTEXT             _IOW('x', 2, long)
233
234 #ifndef HAVE_VSERVER
235 #ifdef ENSC_SYSCALL_TRADITIONAL
236 inline static UNUSED ALWAYSINLINE
237 int vserver(uint32_t cmd, uint32_t id, void *data)
238 {
239 #if defined __dietlibc__
240   extern long int syscall (long int __sysno, ...);
241 #endif
242  
243   return syscall(__NR_vserver, cmd, id, data);
244 }
245 #else
246 inline static UNUSED ALWAYSINLINE
247 _syscall3(int, vserver,
248           uint32_t, cmd, uint32_t, id, void *, data)
249 #endif
250 #endif
251
252 #endif  //  H_VSERVER_SYSCALL_INTERNAL_H