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 asmlinkage long
  43 sys_vserver(uint32_t cmd, uint32_t id, void __user *data)
  44 {
  45
  46         vxdprintk(VXD_CBIT(switch, 0),
  47                 "vc: VCMD_%02d_%d[%d], %d",
  48                 VC_CATEGORY(cmd), VC_COMMAND(cmd),
  49                 VC_VERSION(cmd), id);
  50
  51         switch (cmd) {
  52         case VCMD_get_version:
  53                 return vc_get_version(id);
  54
  55 #ifdef  CONFIG_VSERVER_LEGACY
  56         case VCMD_new_s_context:
  57                 return vc_new_s_context(id, data);
  58         case VCMD_set_ipv4root:
  59                 return vc_set_ipv4root(id, data);
  60 #endif
  61
  62         case VCMD_task_xid:
  63                 return vc_task_xid(id, data);
  64         case VCMD_vx_info:
  65                 return vc_vx_info(id, data);
  66
  67         case VCMD_task_nid:
  68                 return vc_task_nid(id, data);
  69         case VCMD_nx_info:
  70                 return vc_nx_info(id, data);
  71
  72         case VCMD_set_namespace:
  73                 return vc_set_namespace(id, data);
  74         case VCMD_cleanup_namespace:
  75                 return vc_cleanup_namespace(id, data);
  76         }
  77
  78         /* those are allowed while in setup too */
  79         if (!vx_check(0, VX_ADMIN|VX_WATCH) &&
  80                 !vx_flags(VXF_STATE_SETUP,0))
  81                 return -EPERM;
  82
  83 #ifdef  CONFIG_VSERVER_LEGACY
  84         switch (cmd) {
  85         case VCMD_set_cflags:
  86         case VCMD_set_ccaps:
  87                 if (vx_check(0, VX_WATCH))
  88                         return 0;
  89         }
  90 #endif
  91
  92         switch (cmd) {
  93         case VCMD_get_rlimit:
  94                 return vc_get_rlimit(id, data);
  95         case VCMD_set_rlimit:
  96                 return vc_set_rlimit(id, data);
  97         case VCMD_get_rlimit_mask:
  98                 return vc_get_rlimit_mask(id, data);
  99
 100         case VCMD_vx_get_vhi_name:
 101                 return vc_get_vhi_name(id, data);
 102         case VCMD_vx_set_vhi_name:
 103                 return vc_set_vhi_name(id, data);
 104
 105         case VCMD_set_cflags:
 106                 return vc_set_cflags(id, data);
 107         case VCMD_get_cflags:
 108                 return vc_get_cflags(id, data);
 109
 110         case VCMD_set_ccaps:
 111                 return vc_set_ccaps(id, data);
 112         case VCMD_get_ccaps:
 113                 return vc_get_ccaps(id, data);
 114
 115         case VCMD_set_nflags:
 116                 return vc_set_nflags(id, data);
 117         case VCMD_get_nflags:
 118                 return vc_get_nflags(id, data);
 119
 120         case VCMD_set_ncaps:
 121                 return vc_set_ncaps(id, data);
 122         case VCMD_get_ncaps:
 123                 return vc_get_ncaps(id, data);
 124
 125         case VCMD_set_sched:
 126                 return vc_set_sched(id, data);
 127
 128         case VCMD_add_dlimit:
 129                 return vc_add_dlimit(id, data);
 130         case VCMD_rem_dlimit:
 131                 return vc_rem_dlimit(id, data);
 132         case VCMD_set_dlimit:
 133                 return vc_set_dlimit(id, data);
 134         case VCMD_get_dlimit:
 135                 return vc_get_dlimit(id, data);
 136         }
 137
 138         /* below here only with VX_ADMIN */
 139         if (!vx_check(0, VX_ADMIN|VX_WATCH))
 140                 return -EPERM;
 141
 142         switch (cmd) {
 143         case VCMD_ctx_kill:
 144                 return vc_ctx_kill(id, data);
 145
 146 #ifdef  CONFIG_VSERVER_LEGACY
 147         case VCMD_create_context:
 148                 return vc_ctx_create(id, data);
 149 #endif
 150
 151         case VCMD_get_iattr:
 152                 return vc_get_iattr(id, data);
 153         case VCMD_set_iattr:
 154                 return vc_set_iattr(id, data);
 155
 156         case VCMD_enter_namespace:
 157                 return vc_enter_namespace(id, data);
 158
 159         case VCMD_ctx_create:
 160 #ifdef  CONFIG_VSERVER_LEGACY
 161                 if (id == 1) {
 162                         current->xid = 1;
 163                         return 1;
 164                 }
 165 #endif
 166                 return vc_ctx_create(id, data);
 167         case VCMD_ctx_migrate:
 168                 return vc_ctx_migrate(id, data);
 169
 170         case VCMD_net_create:
 171                 return vc_net_create(id, data);
 172         case VCMD_net_migrate:
 173                 return vc_net_migrate(id, data);
 174
 175         }
 176         return -ENOSYS;
 177 }
 178