vserver-internal.h (9348B)
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 <errno.h> 27 #include <stdint.h> 28 #include <unistd.h> 29 30 #include "internal.h" 31 #include "syscall-wrap.h" 32 33 #if !defined(__NR_vserver) && defined(ENSC_SYSCALL__NR_vserver) 34 # define __NR_vserver ENSC_SYSCALL__NR_vserver 35 #endif 36 37 inline static ALWAYSINLINE void vc_noop0() {} 38 39 #define VC_PREFIX 0) 40 #define VC_SUFFIX else (void)(vc_noop0() 41 #define CALL_VC_NOOP vc_noop0() 42 #define CALL_VC_GENERAL(ID, SUFFIX, FUNC, ...) \ 43 VC_PREFIX; VC_SELECT(ID) return FUNC ## _ ## SUFFIX(__VA_ARGS__); VC_SUFFIX 44 #define CALL_VC_GENERAL_CONFIG(BIT, SUFFIX, FUNC, ...) \ 45 VC_PREFIX; VC_CBIT(BIT) return FUNC ## _ ## SUFFIX(__VA_ARGS__); VC_SUFFIX 46 47 #ifdef VC_MULTIVERSION_SYSCALL 48 # define VC_SELECT(ID) if (ver>=(ID)) 49 # define VC_CBIT(BIT) if ((conf&BIT) == BIT) 50 # define CALL_VC(...) \ 51 do { \ 52 int ver = utilvserver_checkCompatVersion(); \ 53 vc_vci_t UNUSED conf = utilvserver_checkCompatConfig(); \ 54 if (ver==-1) return -1; \ 55 VC_SUFFIX, __VA_ARGS__, VC_PREFIX; \ 56 errno = ENOSYS; \ 57 return -1; \ 58 } while (0) 59 #else 60 # define VC_SELECT(ID) if (1) 61 # define VC_CBIT(BIT) if (1) 62 # define CALL_VC(...) \ 63 do { \ 64 if (1) {} VC_SUFFIX, __VA_ARGS__, VC_PREFIX; \ 65 errno = ENOSYS; return -1; \ 66 } while (0) 67 #endif 68 69 #ifdef VC_ENABLE_API_COMPAT 70 # define CALL_VC_COMPAT(F,...) CALL_VC_GENERAL(0x00010000, compat, F, __VA_ARGS__) 71 #else 72 # define CALL_VC_COMPAT(F,...) CALL_VC_NOOP 73 #endif 74 75 #ifdef VC_ENABLE_API_LEGACY 76 # define CALL_VC_LEGACY(F,...) CALL_VC_GENERAL(0x00000000, legacy, F, __VA_ARGS__) 77 #else 78 # define CALL_VC_LEGACY(F,...) CALL_VC_NOOP 79 #endif 80 81 #ifdef VC_ENABLE_API_V11 82 # define CALL_VC_V11(F,...) CALL_VC_GENERAL(0x00010000, v11, F, __VA_ARGS__) 83 #else 84 # define CALL_VC_V11(F,...) CALL_VC_NOOP 85 #endif 86 87 #ifdef VC_ENABLE_API_V13 88 # define CALL_VC_V13(F,...) CALL_VC_GENERAL(0x00010011, v13, F, __VA_ARGS__) 89 #else 90 # define CALL_VC_V13(F,...) CALL_VC_NOOP 91 #endif 92 93 #ifdef VC_ENABLE_API_V13 94 # define CALL_VC_V13A(F,...) CALL_VC_GENERAL(0x00010012, v13, F, __VA_ARGS__) 95 #else 96 # define CALL_VC_V13A(F,...) CALL_VC_NOOP 97 #endif 98 99 #ifdef VC_ENABLE_API_V13 100 # define CALL_VC_V13B(F,...) CALL_VC_GENERAL(0x00010021, v13b, F, __VA_ARGS__) 101 #else 102 # define CALL_VC_V13B(F,...) CALL_VC_NOOP 103 #endif 104 105 #ifdef VC_ENABLE_API_V13OBS 106 # define CALL_VC_V13OBS(F,...) CALL_VC_GENERAL(0x00010011, v13obs, F, __VA_ARGS__) 107 #else 108 # define CALL_VC_V13OBS(F,...) CALL_VC_NOOP 109 #endif 110 111 #ifdef VC_ENABLE_API_V21 112 # define CALL_VC_V21(F,...) CALL_VC_GENERAL(0x00020100, v21, F, __VA_ARGS__) 113 #else 114 # define CALL_VC_V21(F,...) CALL_VC_NOOP 115 #endif 116 117 #if defined(VC_ENABLE_API_V21) || defined(VC_ENABLE_API_V22) || defined(VC_ENABLE_API_V23) 118 # define CALL_VC_SPACES(F,...) CALL_VC_GENERAL_CONFIG(VC_VCI_SPACES, spaces, F, __VA_ARGS__) 119 #else 120 # define CALL_VC_SPACES(F,...) CALL_VC_NOOP 121 #endif 122 123 #if defined(VC_ENABLE_API_V23) 124 # define CALL_VC_TAG(F,...) CALL_VC_GENERAL_CONFIG(VC_VCI_PPTAG, tag, F, __VA_ARGS__) 125 #else 126 # define CALL_VC_TAG(F,...) CALL_VC_NOOP 127 #endif 128 129 #ifdef VC_ENABLE_API_V22 130 # define CALL_VC_V22(F,...) CALL_VC_GENERAL(0x00020200, v22, F, __VA_ARGS__) 131 #else 132 # define CALL_VC_V22(F,...) CALL_VC_NOOP 133 #endif 134 135 #ifdef VC_ENABLE_API_V23 136 # define CALL_VC_V23(F,...) CALL_VC_GENERAL(0x00020300, v23, F, __VA_ARGS__) 137 #else 138 # define CALL_VC_V23(F,...) CALL_VC_NOOP 139 #endif 140 141 #ifdef VC_ENABLE_API_V23 142 # define CALL_VC_V23P(F,...) CALL_VC_GENERAL(0x00020304, v23, F, __VA_ARGS__) 143 #else 144 # define CALL_VC_V23P(F,...) CALL_VC_NOOP 145 #endif 146 147 #ifdef VC_ENABLE_API_NET 148 # define CALL_VC_NET(F,...) CALL_VC_GENERAL(0x00010016, net, F, __VA_ARGS__) 149 #else 150 # define CALL_VC_NET(F,...) CALL_VC_NOOP 151 #endif 152 153 #if defined(VC_ENABLE_API_NETV2) 154 # define CALL_VC_NETV2(F,...) CALL_VC_GENERAL_CONFIG(VC_VCI_NETV2, netv2, F, __VA_ARGS__) 155 #else 156 # define CALL_VC_NETV2(F,...) CALL_VC_NOOP 157 #endif 158 159 #ifdef VC_ENABLE_API_FSCOMPAT 160 # define CALL_VC_FSCOMPAT(F,...) CALL_VC_GENERAL(0x00010000, fscompat, F, __VA_ARGS__) 161 #else 162 # define CALL_VC_FSCOMPAT(F,...) CALL_VC_NOOP 163 #endif 164 165 #ifdef VC_ENABLE_API_OLDPROC 166 # define CALL_VC_OLDPROC(F,...) CALL_VC_GENERAL(0x00000000, oldproc, F, __VA_ARGS__) 167 #else 168 # define CALL_VC_OLDPROC(F,...) CALL_VC_NOOP 169 #endif 170 171 #ifdef VC_ENABLE_API_OLDUTS 172 # define CALL_VC_OLDUTS(F,...) CALL_VC_GENERAL(0x00000000, olduts, F, __VA_ARGS__) 173 #else 174 # define CALL_VC_OLDUTS(F,...) CALL_VC_NOOP 175 #endif 176 177 178 // Some kernel <-> userspace wrappers; they should be noops in most cases 179 180 #if 1 181 # define CTX_KERNEL2USER(X) (((X)==(uint32_t)(-1)) ? VC_NOCTX : \ 182 ((X)==(uint32_t)(-2)) ? VC_SAMECTX : \ 183 (xid_t)(X)) 184 185 # define CTX_USER2KERNEL(X) (((X)==VC_DYNAMIC_XID) ? (uint32_t)(-1) : \ 186 ((X)==VC_SAMECTX) ? (uint32_t)(-2) : \ 187 (uint32_t)(X)) 188 #else 189 # define CTX_USER2KERNEL(X) (X) 190 # define CTX_KERNEL2USER(X) (X) 191 #endif 192 193 #if 1 194 # define TAG_KERNEL2USER(X) (((X)==(uint32_t)(-1)) ? VC_NOCTX : \ 195 ((X)==(uint32_t)(-2)) ? VC_SAMECTX : \ 196 (tag_t)(X)) 197 198 # define TAG_USER2KERNEL(X) (((X)==VC_DYNAMIC_XID) ? (uint32_t)(-1) : \ 199 ((X)==VC_SAMECTX) ? (uint32_t)(-2) : \ 200 (uint32_t)(X)) 201 #else 202 # define TAG_USER2KERNEL(X) (X) 203 # define TAG_KERNEL2USER(X) (X) 204 #endif 205 206 #if 1 207 # define EXT2FLAGS_USER2KERNEL(X) (((X) & ~(VC_IMMUTABLE_FILE_FL|VC_IMMUTABLE_LINK_FL)) | \ 208 ((X) & VC_IMMUTABLE_FILE_FL ? EXT2_IMMUTABLE_FILE_FL : 0) | \ 209 ((X) & VC_IMMUTABLE_LINK_FL ? EXT2_IMMUTABLE_LINK_FL : 0)) 210 # define EXT2FLAGS_KERNEL2USER(X) (((X) & ~(EXT2_IMMUTABLE_FILE_FL|EXT2_IMMUTABLE_LINK_FL)) | \ 211 ((X) & EXT2_IMMUTABLE_FILE_FL ? VC_IMMUTABLE_FILE_FL : 0) | \ 212 ((X) & EXT2_IMMUTABLE_LINK_FL ? VC_IMMUTABLE_LINK_FL : 0)) 213 #else 214 # define EXT2FLAGS_KERNEL2USER(X) (X) 215 # define EXT2FLAGS_USER2KERNEL(X) (X) 216 #endif 217 218 #if 1 219 # define VHI_USER2KERNEL(X) ((((X)==vcVHI_CONTEXT) ? VHIN_CONTEXT : \ 220 ((X)==vcVHI_SYSNAME) ? VHIN_SYSNAME : \ 221 ((X)==vcVHI_NODENAME) ? VHIN_NODENAME : \ 222 ((X)==vcVHI_RELEASE) ? VHIN_RELEASE : \ 223 ((X)==vcVHI_VERSION) ? VHIN_VERSION : \ 224 ((X)==vcVHI_MACHINE) ? VHIN_MACHINE : \ 225 ((X)==vcVHI_DOMAINNAME) ? VHIN_DOMAINNAME : \ 226 (X))) 227 # define VHI_KERNEL2USER(X) ((((X)==VHIN_CONTEXT) ? vcVHI_CONTEXT : \ 228 ((X)==VHIN_SYSNAME) ? vcVHI_SYSNAME : \ 229 ((X)==VHIN_NODENAME) ? vcVHI_NODENAME : \ 230 ((X)==VHIN_RELEASE) ? vcVHI_RELEASE : \ 231 ((X)==VHIN_VERSION) ? vcVHI_VERSION : \ 232 ((X)==VHIN_MACHINE) ? vcVHI_MACHINE : \ 233 ((X)==VHIN_DOMAINNAME) ? vcVHI_DOMAINNAME : \ 234 (X))) 235 #else 236 # define VHI_USER2KERNEL(X) (X) 237 # define VHI_KERNEL2USER(X) (X) 238 #endif 239 240 #if 1 241 # define NID_KERNEL2USER(X) (((X)==(uint32_t)(-1)) ? VC_NONID : \ 242 (xid_t)(X)) 243 244 # define NID_USER2KERNEL(X) (((X)==VC_DYNAMIC_NID) ? (uint32_t)(-1) : \ 245 (uint32_t)(X)) 246 #else 247 # define NID_USER2KERNEL(X) (X) 248 # define NID_KERNEL2USER(X) (X) 249 #endif 250 251 #define CDLIM_USER2KERNEL(X) ((X)==VC_CDLIM_UNSET ? CDLIM_UNSET : \ 252 (X)==VC_CDLIM_INFINITY ? CDLIM_INFINITY : \ 253 (X)==VC_CDLIM_KEEP ? CDLIM_KEEP : \ 254 (X)) 255 256 /// the __typeof__ thing is a hack to deal with the kernel interface 257 /// using an unsigned long long value for a uint32_t type 258 #define CDLIM_KERNEL2USER(X) ((X)==(__typeof__(X))CDLIM_UNSET ? VC_CDLIM_UNSET : \ 259 (X)==(__typeof__(X))CDLIM_INFINITY ? VC_CDLIM_INFINITY : \ 260 (X)==(__typeof__(X))CDLIM_KEEP ? VC_CDLIM_KEEP : \ 261 (X)) 262 263 264 #define ENSC_STRUCT_IDX(STRUCT,ATTR) \ 265 ((char*)(&(STRUCT).ATTR) - (char*)(&(STRUCT))) 266 #define ENSC_SAME_STRUCT_IDX(LHS,RHS,ATTR) \ 267 (ENSC_STRUCT_IDX(LHS,ATTR) == ENSC_STRUCT_IDX(RHS,ATTR)) 268 #define ENSC_SAME_STRUCT_ITEM(LHS,RHS,ATTR) \ 269 (ENSC_SAME_STRUCT_IDX(LHS,RHS,ATTR) && \ 270 sizeof((LHS).ATTR)==sizeof((RHS).ATTR) && \ 271 sizeof(LHS)==sizeof(RHS)) 272 273 #define EXT2_IOC_GETCONTEXT _IOR('x', 1, long) 274 #define EXT2_IOC_SETCONTEXT _IOW('x', 2, long) 275 276 #if defined(__GNUC__) 277 # define VC_ATTR_HIDDEN __attribute__ ((hidden)) 278 #else 279 # define VC_ATTR_HIDDEN 280 #endif 281 282 #ifndef HAVE_VSERVER 283 #ifdef ENSC_SYSCALL_TRADITIONAL 284 inline static UNUSED ALWAYSINLINE 285 int vserver(uint32_t cmd, uint32_t id, void *data) 286 { 287 return syscall(__NR_vserver, cmd, id, data); 288 } 289 #else 290 inline static UNUSED ALWAYSINLINE 291 _syscall3(int, vserver, 292 uint32_t, cmd, uint32_t, id, void *, data) 293 #endif 294 #endif 295 296 #endif // H_VSERVER_SYSCALL_INTERNAL_H