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