added *-release packages
[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 #include "syscall-wrap.h"
34
35 #if !defined(__NR_vserver) && defined(ENSC_SYSCALL__NR_vserver)
36 #  define __NR_vserver  ENSC_SYSCALL__NR_vserver
37 #endif
38
39 inline static ALWAYSINLINE void vc_noop0() {}
40
41 #define VC_PREFIX       0)
42 #define VC_SUFFIX       else (void)(vc_noop0()
43 #define CALL_VC_NOOP    vc_noop0()
44 #define CALL_VC_GENERAL(ID, SUFFIX, FUNC, ...)                          \
45   VC_PREFIX; VC_SELECT(ID) return FUNC ## _ ## SUFFIX(__VA_ARGS__); VC_SUFFIX
46
47 #ifdef VC_MULTIVERSION_SYSCALL
48 #  define VC_SELECT(ID) if (ver>=(ID))
49 #  define CALL_VC(...)                                  \
50   do {                                                  \
51     int ver = utilvserver_checkCompatVersion();         \
52     if (ver==-1) return -1;                             \
53     VC_SUFFIX, __VA_ARGS__, VC_PREFIX;                  \
54     errno = ENOSYS;                                     \
55     return -1;                                          \
56   } while (0)
57 #else
58 #  define VC_SELECT(ID) if (1)
59 #  define CALL_VC(...)                                  \
60   do {                                                  \
61     if (1) {} VC_SUFFIX, __VA_ARGS__, VC_PREFIX;        \
62     errno = ENOSYS; return -1;                          \
63   } while (0)
64 #endif
65
66 #ifdef VC_ENABLE_API_COMPAT
67 #  define CALL_VC_COMPAT(F,...) CALL_VC_GENERAL(0x00010000, compat, F, __VA_ARGS__)
68 #else
69 #  define CALL_VC_COMPAT(F,...) CALL_VC_NOOP
70 #endif
71
72 #ifdef VC_ENABLE_API_LEGACY
73 #  define CALL_VC_LEGACY(F,...) CALL_VC_GENERAL(0x00000000, legacy, F, __VA_ARGS__)
74 #else
75 #  define CALL_VC_LEGACY(F,...) CALL_VC_NOOP
76 #endif
77
78 #ifdef VC_ENABLE_API_V11
79 #  define CALL_VC_V11(F,...)    CALL_VC_GENERAL(0x00010000, v11, F, __VA_ARGS__)
80 #else
81 #  define CALL_VC_V11(F,...)    CALL_VC_NOOP
82 #endif
83
84 #ifdef VC_ENABLE_API_V13
85 #  define CALL_VC_V13(F,...)    CALL_VC_GENERAL(0x00010011, v13, F, __VA_ARGS__)
86 #else
87 #  define CALL_VC_V13(F,...)    CALL_VC_NOOP
88 #endif
89
90 #ifdef VC_ENABLE_API_V13
91 #  define CALL_VC_V13A(F,...)   CALL_VC_GENERAL(0x00010012, v13, F, __VA_ARGS__)
92 #else
93 #  define CALL_VC_V13A(F,...)   CALL_VC_NOOP
94 #endif
95
96 #ifdef VC_ENABLE_API_V13
97 #  define CALL_VC_V13B(F,...)   CALL_VC_GENERAL(0x00010021, v13b, F, __VA_ARGS__)
98 #else
99 #  define CALL_VC_V13B(F,...)   CALL_VC_NOOP
100 #endif
101
102 #ifdef VC_ENABLE_API_V13
103 #  define CALL_VC_V13OBS(F,...) CALL_VC_GENERAL(0x00010011, v13obs, F, __VA_ARGS__)
104 #else
105 #  define CALL_VC_V13OBS(F,...) CALL_VC_NOOP
106 #endif
107
108
109 #ifdef VC_ENABLE_API_NET
110 #  define CALL_VC_NET(F,...)    CALL_VC_GENERAL(0x00010016, net, F, __VA_ARGS__)
111 #else
112 #  define CALL_VC_NET(F,...)    CALL_VC_NOOP
113 #endif
114
115 #ifdef VC_ENABLE_API_FSCOMPAT
116 #  define CALL_VC_FSCOMPAT(F,...)       CALL_VC_GENERAL(0x00010000, fscompat, F, __VA_ARGS__)
117 #else
118 #  define CALL_VC_FSCOMPAT(F,...)       CALL_VC_NOOP
119 #endif
120
121 #ifdef VC_ENABLE_API_OLDPROC
122 #  define CALL_VC_OLDPROC(F,...)        CALL_VC_GENERAL(0x00000000, oldproc, F, __VA_ARGS__)
123 #else
124 #  define CALL_VC_OLDPROC(F,...)        CALL_VC_NOOP
125 #endif
126
127 #ifdef VC_ENABLE_API_OLDUTS
128 #  define CALL_VC_OLDUTS(F,...)         CALL_VC_GENERAL(0x00000000, olduts, F, __VA_ARGS__)
129 #else
130 #  define CALL_VC_OLDUTS(F,...)         CALL_VC_NOOP
131 #endif
132
133
134   // Some  kernel <-> userspace wrappers; they should be noops in most cases
135
136 #if 1
137 #  define CTX_KERNEL2USER(X)    (((X)==(uint32_t)(-1)) ? VC_NOCTX   : \
138                                  ((X)==(uint32_t)(-2)) ? VC_SAMECTX : \
139                                  (xid_t)(X))
140
141 #  define CTX_USER2KERNEL(X)    (((X)==VC_DYNAMIC_XID) ? (uint32_t)(-1) : \
142                                  ((X)==VC_SAMECTX)     ? (uint32_t)(-2) : \
143                                  (uint32_t)(X))
144 #else
145 #  define CTX_USER2KERNEL(X)    (X)
146 #  define CTX_KERNEL2USER(X)    (X)
147 #endif
148
149 #if 1
150 #  define EXT2FLAGS_USER2KERNEL(X)      (((X) & ~(VC_IMMUTABLE_FILE_FL|VC_IMMUTABLE_LINK_FL)) | \
151                                          ((X) & VC_IMMUTABLE_FILE_FL ? EXT2_IMMUTABLE_FILE_FL : 0) | \
152                                          ((X) & VC_IMMUTABLE_LINK_FL ? EXT2_IMMUTABLE_LINK_FL : 0))
153 #  define EXT2FLAGS_KERNEL2USER(X)      (((X) & ~(EXT2_IMMUTABLE_FILE_FL|EXT2_IMMUTABLE_LINK_FL)) | \
154                                          ((X) & EXT2_IMMUTABLE_FILE_FL ? VC_IMMUTABLE_FILE_FL : 0) | \
155                                          ((X) & EXT2_IMMUTABLE_LINK_FL ? VC_IMMUTABLE_LINK_FL : 0))
156 #else
157 #  define EXT2FLAGS_KERNEL2USER(X)      (X)
158 #  define EXT2FLAGS_USER2KERNEL(X)      (X)
159 #endif
160
161 #if 1
162 #  define VHI_USER2KERNEL(X)            ((((X)==vcVHI_CONTEXT)    ? VHIN_CONTEXT    : \
163                                           ((X)==vcVHI_SYSNAME)    ? VHIN_SYSNAME    : \
164                                           ((X)==vcVHI_NODENAME)   ? VHIN_NODENAME   : \
165                                           ((X)==vcVHI_RELEASE)    ? VHIN_RELEASE    : \
166                                           ((X)==vcVHI_VERSION)    ? VHIN_VERSION    : \
167                                           ((X)==vcVHI_MACHINE)    ? VHIN_MACHINE    : \
168                                           ((X)==vcVHI_DOMAINNAME) ? VHIN_DOMAINNAME : \
169                                           (X)))
170 #  define VHI_KERNEL2USER(X)            ((((X)==VHIN_CONTEXT)     ? vcVHI_CONTEXT    : \
171                                           ((X)==VHIN_SYSNAME)     ? vcVHI_SYSNAME    : \
172                                           ((X)==VHIN_NODENAME)    ? vcVHI_NODENAME   : \
173                                           ((X)==VHIN_RELEASE)     ? vcVHI_RELEASE    : \
174                                           ((X)==VHIN_VERSION)     ? vcVHI_VERSION    : \
175                                           ((X)==VHIN_MACHINE)     ? vcVHI_MACHINE    : \
176                                           ((X)==VHIN_DOMAINNAME)  ? vcVHI_DOMAINNAME : \
177                                           (X)))
178 #else
179 #  define VHI_USER2KERNEL(X)            (X)
180 #  define VHI_KERNEL2USER(X)            (X)
181 #endif
182
183 #if 1
184 #  define NID_KERNEL2USER(X)    (((X)==(uint32_t)(-1)) ? VC_NONID   : \
185                                  (xid_t)(X))
186
187 #  define NID_USER2KERNEL(X)    (((X)==VC_DYNAMIC_NID) ? (uint32_t)(-1) : \
188                                  (uint32_t)(X))
189 #else
190 #  define NID_USER2KERNEL(X)    (X)
191 #  define NID_KERNEL2USER(X)    (X)
192 #endif
193
194 #if 1
195 #  define NETTYPE_USER2KERNEL(X)        ((X)==vcNET_IPV4   ? 0 : \
196                                          (X)==vcNET_IPV6   ? 1 : \
197                                          (X)==vcNET_IPV4R  ? 2 : \
198                                          (X)==vcNET_IPV6R  ? 3 : \
199                                          (X))
200 #  define NETTYPE_KERNEL2USER(X)        ((X)==0 ? vcNET_IPV4   ? : \
201                                          (X)==1 ? vcNET_IPV6   ? : \
202                                          (X)==2 ? vcNET_IPV4R  ? : \
203                                          (X)==3 ? vcNET_IPV6R  ? : \
204                                          (vc_net_nx_type)(X))
205 #else
206 #  define NETTYPE_USER2KERNEL(X)        (X)
207 #  define NETTYPE_KERNEL2USER(X)        (X)
208 #endif
209
210 #define CDLIM_USER2KERNEL(X)            ((X)==VC_CDLIM_UNSET    ? CDLIM_UNSET    : \
211                                          (X)==VC_CDLIM_INFINITY ? CDLIM_INFINITY : \
212                                          (X)==VC_CDLIM_KEEP     ? CDLIM_KEEP     : \
213                                          (X))
214
215   /// the __typeof__ thing is a hack to deal with the kernel interface
216   /// using an unsigned long long value for a uint32_t type
217 #define CDLIM_KERNEL2USER(X)            ((X)==(__typeof__(X))CDLIM_UNSET       ? VC_CDLIM_UNSET    : \
218                                          (X)==(__typeof__(X))CDLIM_INFINITY    ? VC_CDLIM_INFINITY : \
219                                          (X)==(__typeof__(X))CDLIM_KEEP        ? VC_CDLIM_KEEP     : \
220                                          (X))
221
222
223 #define ENSC_STRUCT_IDX(STRUCT,ATTR)                    \
224   ((char*)(&(STRUCT).ATTR) - (char*)(&(STRUCT)))
225 #define ENSC_SAME_STRUCT_IDX(LHS,RHS,ATTR)                      \
226   (ENSC_STRUCT_IDX(LHS,ATTR) == ENSC_STRUCT_IDX(RHS,ATTR))
227 #define ENSC_SAME_STRUCT_ITEM(LHS,RHS,ATTR)     \
228   (ENSC_SAME_STRUCT_IDX(LHS,RHS,ATTR) &&        \
229    sizeof((LHS).ATTR)==sizeof((RHS).ATTR) &&    \
230    sizeof(LHS)==sizeof(RHS))
231
232 #define EXT2_IOC_GETCONTEXT             _IOR('x', 1, long)
233 #define EXT2_IOC_SETCONTEXT             _IOW('x', 2, long)
234
235 #ifndef HAVE_VSERVER
236 #ifdef ENSC_SYSCALL_TRADITIONAL
237 inline static UNUSED ALWAYSINLINE
238 int vserver(uint32_t cmd, uint32_t id, void *data)
239 {
240 #if defined __dietlibc__
241   extern long int syscall (long int __sysno, ...);
242 #endif
243  
244   return syscall(__NR_vserver, cmd, id, data);
245 }
246 #else
247 inline static UNUSED ALWAYSINLINE
248 _syscall3(int, vserver,
249           uint32_t, cmd, uint32_t, id, void *, data)
250 #endif
251 #endif
252
253 #endif  //  H_VSERVER_SYSCALL_INTERNAL_H