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[util-vserver.git] / lib / vserver.h

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+/* $Id: vserver.h,v 1.1.4.11 2004/01/26 18:19:41 ensc Exp $
+
+*  Copyright (C) 2003 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
+*   
+*  This program is free software; you can redistribute it and/or modify
+*  it under the terms of the GNU General Public License as published by
+*  the Free Software Foundation; either version 2, or (at your option)
+*  any later version.
+*   
+*  This program is distributed in the hope that it will be useful,
+*  but WITHOUT ANY WARRANTY; without even the implied warranty of
+*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*  GNU General Public License for more details.
+*   
+*  You should have received a copy of the GNU General Public License
+*  along with this program; if not, write to the Free Software
+*  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+
+#ifndef H_VSERVER_SYSCALL_H
+#define H_VSERVER_SYSCALL_H
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <sys/types.h>
+
+/** the value which is returned in error-case (no ctx found) */
+#define VC_NOCTX               ((xid_t)(-1))
+/** the value which means a random (the next free) ctx */
+#define VC_RANDCTX             ((xid_t)(-1))
+/** the value which means the current ctx */
+#define VC_SAMECTX             ((xid_t)(-2))
+
+#define VC_LIM_INFINITY                (~0ULL)
+#define VC_LIM_KEEP            (~1ULL)
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+  struct vc_ip_mask_pair {
+    uint32_t   ip;
+    uint32_t   mask;
+  };
+
+    /** Returns version of the current kernel API */
+  int  vc_get_version();
+  
+    /** Puts current process into context <ctx>, removes the given caps and
+     *  sets flags.
+     *  Special values for ctx are
+     *  - VC_SAMECTX  which means the current context (just for changing caps and flags)
+     *  - VC_RANDCTX  which means the next free context; this value can be used by
+     *                ordinary users also */
+  int  vc_new_s_context(xid_t ctx, unsigned int remove_cap, unsigned int flags);
+
+    /** Sets the ipv4root information.
+     *  \precondition: nb<16 */
+  int  vc_set_ipv4root(uint32_t  bcast, size_t nb, struct vc_ip_mask_pair const *ips);
+  
+
+  /* rlimit related functions */
+  typedef uint64_t     vc_limit_t;
+  
+  
+  struct vc_rlimit
+  {
+      vc_limit_t min;
+      vc_limit_t soft;
+      vc_limit_t hard;      
+  };
+
+  struct  vc_rlimit_mask {
+      uint32_t min;
+      uint32_t soft;
+      uint32_t hard;
+  };
+
+  int  vc_get_rlimit(xid_t ctx, int resource, struct vc_rlimit *lim);
+  int  vc_set_rlimit(xid_t ctx, int resource, struct vc_rlimit const *lim);
+  int  vc_get_rlimit_mask(xid_t ctx, struct vc_rlimit_mask *lim);
+
+
+  /** sends a signal to a context/pid
+      Special values for pid are:
+      * -1   which means every process in ctx except the init-process
+      *  0   which means every process in ctx inclusive the init-process */
+  int  vc_ctx_kill(xid_t ctx, pid_t pid, int sig);
+  
+    /** Returns the context of the given process. pid==0 means the current process. */
+  xid_t        vc_X_getctx(pid_t pid);
+    
+#ifdef __cplusplus
+}
+#endif
+
+#endif