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         if (!capable(CAP_CONTEXT))
  46                 return -EPERM;
  47
  48         vxdprintk(VXD_CBIT(switch, 0),
  49                 "vc: VCMD_%02d_%d[%d], %d",
  50                 VC_CATEGORY(cmd), VC_COMMAND(cmd),
  51                 VC_VERSION(cmd), id);
  52
  53         switch (cmd) {
  54         case VCMD_get_version:
  55                 return vc_get_version(id);
  56
  57 #ifdef  CONFIG_VSERVER_LEGACY
  58         case VCMD_new_s_context:
  59                 return vc_new_s_context(id, data);
  60         case VCMD_set_ipv4root:
  61                 return vc_set_ipv4root(id, data);
  62 #endif
  63
  64         case VCMD_task_xid:
  65                 return vc_task_xid(id, data);
  66         case VCMD_vx_info:
  67                 return vc_vx_info(id, data);
  68
  69         case VCMD_task_nid:
  70                 return vc_task_nid(id, data);
  71         case VCMD_nx_info:
  72                 return vc_nx_info(id, data);
  73
  74         case VCMD_set_namespace:
  75                 return vc_set_namespace(id, data);
  76         case VCMD_cleanup_namespace:
  77                 return vc_cleanup_namespace(id, data);
  78         }
  79
  80         /* those are allowed while in setup too */
  81         if (!vx_check(0, VX_ADMIN|VX_WATCH) &&
  82                 !vx_flags(VXF_STATE_SETUP,0))
  83                 return -EPERM;
  84
  85 #ifdef  CONFIG_VSERVER_LEGACY
  86         switch (cmd) {
  87         case VCMD_set_cflags:
  88         case VCMD_set_ccaps:
  89                 if (vx_check(0, VX_WATCH))
  90                         return 0;
  91         }
  92 #endif
  93
  94         switch (cmd) {
  95         case VCMD_get_rlimit:
  96                 return vc_get_rlimit(id, data);
  97         case VCMD_set_rlimit:
  98                 return vc_set_rlimit(id, data);
  99         case VCMD_get_rlimit_mask:
 100                 return vc_get_rlimit_mask(id, data);
 101
 102         case VCMD_vx_get_vhi_name:
 103                 return vc_get_vhi_name(id, data);
 104         case VCMD_vx_set_vhi_name:
 105                 return vc_set_vhi_name(id, data);
 106
 107         case VCMD_set_cflags:
 108                 return vc_set_cflags(id, data);
 109         case VCMD_get_cflags:
 110                 return vc_get_cflags(id, data);
 111
 112         case VCMD_set_ccaps:
 113                 return vc_set_ccaps(id, data);
 114         case VCMD_get_ccaps:
 115                 return vc_get_ccaps(id, data);
 116
 117         case VCMD_set_nflags:
 118                 return vc_set_nflags(id, data);
 119         case VCMD_get_nflags:
 120                 return vc_get_nflags(id, data);
 121
 122         case VCMD_set_ncaps:
 123                 return vc_set_ncaps(id, data);
 124         case VCMD_get_ncaps:
 125                 return vc_get_ncaps(id, data);
 126
 127         case VCMD_set_sched_v2:
 128                 return vc_set_sched_v2(id, data);
 129         /* this is version 3 */
 130         case VCMD_set_sched:
 131                 return vc_set_sched(id, data);
 132
 133         case VCMD_add_dlimit:
 134                 return vc_add_dlimit(id, data);
 135         case VCMD_rem_dlimit:
 136                 return vc_rem_dlimit(id, data);
 137         case VCMD_set_dlimit:
 138                 return vc_set_dlimit(id, data);
 139         case VCMD_get_dlimit:
 140                 return vc_get_dlimit(id, data);
 141         }
 142
 143         /* below here only with VX_ADMIN */
 144         if (!vx_check(0, VX_ADMIN|VX_WATCH))
 145                 return -EPERM;
 146
 147         switch (cmd) {
 148         case VCMD_ctx_kill:
 149                 return vc_ctx_kill(id, data);
 150
 151         case VCMD_wait_exit:
 152                 return vc_wait_exit(id, data);
 153
 154 #ifdef  CONFIG_VSERVER_LEGACY
 155         case VCMD_create_context:
 156                 return vc_ctx_create(id, data);
 157 #endif
 158
 159         case VCMD_get_iattr:
 160                 return vc_get_iattr(id, data);
 161         case VCMD_set_iattr:
 162                 return vc_set_iattr(id, data);
 163
 164         case VCMD_enter_namespace:
 165                 return vc_enter_namespace(id, data);
 166
 167         case VCMD_ctx_create:
 168 #ifdef  CONFIG_VSERVER_LEGACY
 169                 if (id == 1) {
 170                         current->xid = 1;
 171                         return 1;
 172                 }
 173 #endif
 174                 return vc_ctx_create(id, data);
 175         case VCMD_ctx_migrate:
 176                 return vc_ctx_migrate(id, data);
 177
 178         case VCMD_net_create:
 179                 return vc_net_create(id, data);
 180         case VCMD_net_migrate:
 181                 return vc_net_migrate(id, data);
 182
 183         }
 184         return -ENOSYS;
 185 }
 186