* added fscompat & oldproc API
authorEnrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
Wed, 21 Jan 2004 18:57:45 +0000 (18:57 +0000)
committerEnrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
Wed, 21 Jan 2004 18:57:45 +0000 (18:57 +0000)
* added support for VC_MULTIVERSION_SYSCALL which chooses the optimal
  CALL_VC variant
* changed CALL_VC() so that it looks for version greater than requested
  one now

git-svn-id: http://svn.linux-vserver.org/svn/util-vserver/trunk@673 94cd875c-1c1d-0410-91d2-eb244daf1a30

util-vserver/lib/vserver-internal.h

index 7a4324f..43cd3c7 100644 (file)
@@ -15,6 +15,9 @@
 // along with this program; if not, write to the Free Software
 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 
+#ifdef H_VSERVER_SYSCALL_INTERNAL_H
+#  error vserver-internal.h must not be included more than once
+#endif
 
 #ifndef H_VSERVER_SYSCALL_INTERNAL_H
 #define H_VSERVER_SYSCALL_INTERNAL_H
 #define CALL_VC_GENERAL(ID, SUFFIX, FUNC, ...)                         \
   VC_PREFIX; VC_SELECT(ID) return FUNC ## _ ## SUFFIX(__VA_ARGS__); VC_SUFFIX
 
-#if 1
-#  define VC_SELECT(ID)        case ID: if(1)
+#ifdef VC_MULTIVERSION_SYSCALL
+#  define VC_SELECT(ID)        if (ver>=(ID))
 #  define CALL_VC(...)                                 \
   do {                                                 \
-    switch (utilvserver_checkCompatVersion()&~0xff) {  \
-      case -1 & ~0xff  :  if (1) break;                \
-       VC_SUFFIX, __VA_ARGS__ , VC_PREFIX;             \
-      default  :  errno = EINVAL;                      \
-    }                                                  \
+    int        ver = utilvserver_checkCompatVersion();         \
+    if (ver==-1) return -1;                            \
+    VC_SUFFIX, __VA_ARGS__, VC_PREFIX;                 \
+    errno = EINVAL;                                    \
     return -1;                                         \
   } while (0)
 #else
 #endif
 
 #ifdef VC_ENABLE_API_V13
-#  define CALL_VC_V13(F,...)   CALL_VC_GENERAL(0x00010000, v13, F, __VA_ARGS__)
+#  define CALL_VC_V13(F,...)   CALL_VC_GENERAL(0x00010010, v13, F, __VA_ARGS__)
 #else
 #  define CALL_VC_V13(F,...)   CALL_VC_NOOP
 #endif
 
+#ifdef VC_ENABLE_API_FSCOMPAT
+#  define CALL_VC_FSCOMPAT(F,...)      CALL_VC_GENERAL(0x00010000, fscompat, F, __VA_ARGS__)
+#else
+#  define CALL_VC_FSCOMPAT(F,...)      CALL_VC_NOOP
+#endif
+
+#ifdef VC_ENABLE_API_OLDPROC
+#  define CALL_VC_OLDPROC(F,...)       CALL_VC_GENERAL(0x00000000, X, F, __VA_ARGS__)
+#else
+#  define CALL_VC_OLDPROC(F,...)       CALL_VC_NOOP
+#endif
 
 #if 1
 #  define CTX_KERNEL2USER(X)   (((X)==(uint32_t)(-1)) ? VC_NOCTX   : \