kernel/vserver/switch.c

   1 /*
   2  *  linux/kernel/vserver/switch.c
   3  *
   4  *  Virtual Server: Syscall Switch
   5  *
   6  *  Copyright (C) 2003-2004  Herbert Pötzl
   7  *
   8  *  V0.01  syscall switch
   9  *  V0.02  added signal to context
  10  *  V0.03  added rlimit functions
  11  *  V0.04  added iattr, task/xid functions
  12  *
  13  */
  14
  15 #include <linux/config.h>
  16 #include <linux/linkage.h>
  17 #include <asm/errno.h>
  18
  19 #include <linux/vs_base.h>
  20 #include <linux/vs_context.h>
  21 #include <linux/vserver/switch.h>
  22
  23
  24 static inline int
  25 vc_get_version(uint32_t id)
  26 {
  27         return VCI_VERSION;
  28 }
  29
  30
  31 #include <linux/vserver/legacy.h>
  32 #include <linux/vserver/context.h>
  33 #include <linux/vserver/network.h>
  34 #include <linux/vserver/namespace.h>
  35 #include <linux/vserver/sched.h>
  36 #include <linux/vserver/limit.h>
  37 #include <linux/vserver/inode.h>
  38 #include <linux/vserver/signal.h>
  39 #include <linux/vserver/dlimit.h>
  40
  41
  42 extern unsigned int vx_debug_switch;
  43
  44
  45 extern asmlinkage long
  46 sys_vserver(uint32_t cmd, uint32_t id, void __user *data)
  47 {
  48
  49         if (vx_debug_switch)
  50                 printk( "vc: VCMD_%02d_%d[%d], %d\n",
  51                         VC_CATEGORY(cmd), VC_COMMAND(cmd),
  52                         VC_VERSION(cmd), id);
  53
  54         switch (cmd) {
  55         case VCMD_get_version:
  56                 return vc_get_version(id);
  57
  58 #ifdef  CONFIG_VSERVER_LEGACY
  59         case VCMD_new_s_context:
  60                 return vc_new_s_context(id, data);
  61         case VCMD_set_ipv4root:
  62                 return vc_set_ipv4root(id, data);
  63 #endif
  64
  65         case VCMD_task_xid:
  66                 return vc_task_xid(id, data);
  67         case VCMD_vx_info:
  68                 return vc_vx_info(id, data);
  69
  70         case VCMD_task_nid:
  71                 return vc_task_nid(id, data);
  72         case VCMD_nx_info:
  73                 return vc_nx_info(id, data);
  74
  75         case VCMD_set_namespace:
  76                 return vc_set_namespace(id, data);
  77         case VCMD_cleanup_namespace:
  78                 return vc_cleanup_namespace(id, data);
  79         }
  80
  81         /* those are allowed while in setup too */
  82         if (!vx_check(0, VX_ADMIN|VX_WATCH) &&
  83                 !vx_flags(VXF_STATE_SETUP,0))
  84                 return -EPERM;
  85
  86 #ifdef  CONFIG_VSERVER_LEGACY
  87         switch (cmd) {
  88         case VCMD_set_cflags:
  89         case VCMD_set_ccaps:
  90                 if (vx_check(0, VX_WATCH))
  91                         return 0;
  92         }
  93 #endif
  94
  95         switch (cmd) {
  96         case VCMD_get_rlimit:
  97                 return vc_get_rlimit(id, data);
  98         case VCMD_set_rlimit:
  99                 return vc_set_rlimit(id, data);
 100         case VCMD_get_rlimit_mask:
 101                 return vc_get_rlimit_mask(id, data);
 102
 103         case VCMD_vx_get_vhi_name:
 104                 return vc_get_vhi_name(id, data);
 105         case VCMD_vx_set_vhi_name:
 106                 return vc_set_vhi_name(id, data);
 107
 108         case VCMD_set_cflags:
 109                 return vc_set_cflags(id, data);
 110         case VCMD_get_cflags:
 111                 return vc_get_cflags(id, data);
 112
 113         case VCMD_set_ccaps:
 114                 return vc_set_ccaps(id, data);
 115         case VCMD_get_ccaps:
 116                 return vc_get_ccaps(id, data);
 117
 118         case VCMD_set_nflags:
 119                 return vc_set_nflags(id, data);
 120         case VCMD_get_nflags:
 121                 return vc_get_nflags(id, data);
 122
 123         case VCMD_set_ncaps:
 124                 return vc_set_ncaps(id, data);
 125         case VCMD_get_ncaps:
 126                 return vc_get_ncaps(id, data);
 127
 128         case VCMD_set_sched:
 129                 return vc_set_sched(id, data);
 130
 131         case VCMD_add_dlimit:
 132                 return vc_add_dlimit(id, data);
 133         case VCMD_rem_dlimit:
 134                 return vc_rem_dlimit(id, data);
 135         case VCMD_set_dlimit:
 136                 return vc_set_dlimit(id, data);
 137         case VCMD_get_dlimit:
 138                 return vc_get_dlimit(id, data);
 139         }
 140
 141         /* below here only with VX_ADMIN */
 142         if (!vx_check(0, VX_ADMIN|VX_WATCH))
 143                 return -EPERM;
 144
 145         switch (cmd) {
 146         case VCMD_ctx_kill:
 147                 return vc_ctx_kill(id, data);
 148
 149 #ifdef  CONFIG_VSERVER_LEGACY
 150         case VCMD_create_context:
 151                 return vc_ctx_create(id, data);
 152 #endif
 153
 154         case VCMD_get_iattr:
 155                 return vc_get_iattr(id, data);
 156         case VCMD_set_iattr:
 157                 return vc_set_iattr(id, data);
 158
 159         case VCMD_enter_namespace:
 160                 return vc_enter_namespace(id, data);
 161
 162         case VCMD_ctx_create:
 163 #ifdef  CONFIG_VSERVER_LEGACY
 164                 if (id == 1) {
 165                         current->xid = 1;
 166                         return 1;
 167                 }
 168 #endif
 169                 return vc_ctx_create(id, data);
 170         case VCMD_ctx_migrate:
 171                 return vc_ctx_migrate(id, data);
 172
 173         case VCMD_net_create:
 174                 return vc_net_create(id, data);
 175         case VCMD_net_migrate:
 176                 return vc_net_migrate(id, data);
 177
 178         }
 179         return -ENOSYS;
 180 }
 181