kernel/vserver/switch.c

   1 /*
   2  *  linux/kernel/vserver/switch.c
   3  *
   4  *  Virtual Server: Syscall Switch
   5  *
   6  *  Copyright (C) 2003-2005  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  *  V0.05  added debug/history stuff
  13  *
  14  */
  15
  16 #include <linux/config.h>
  17 #include <linux/linkage.h>
  18 #include <linux/sched.h>
  19 #include <asm/errno.h>
  20
  21 #include <linux/vserver/network.h>
  22 #include <linux/vserver/switch.h>
  23 #include <linux/vserver/debug.h>
  24
  25
  26 static inline int
  27 vc_get_version(uint32_t id)
  28 {
  29         return VCI_VERSION;
  30 }
  31
  32 #include <linux/vserver/context_cmd.h>
  33 #include <linux/vserver/cvirt_cmd.h>
  34 #include <linux/vserver/limit_cmd.h>
  35 #include <linux/vserver/network_cmd.h>
  36 #include <linux/vserver/sched_cmd.h>
  37 #include <linux/vserver/debug_cmd.h>
  38 #include <linux/vserver/inode_cmd.h>
  39
  40 #include <linux/vserver/legacy.h>
  41 #include <linux/vserver/namespace.h>
  42 #include <linux/vserver/inode.h>
  43 #include <linux/vserver/signal.h>
  44 #include <linux/vserver/dlimit.h>
  45
  46
  47 extern asmlinkage long
  48 sys_vserver(uint32_t cmd, uint32_t id, void __user *data)
  49 {
  50         vxdprintk(VXD_CBIT(switch, 0),
  51                 "vc: VCMD_%02d_%d[%d], %d",
  52                 VC_CATEGORY(cmd), VC_COMMAND(cmd),
  53                 VC_VERSION(cmd), id);
  54
  55 #ifdef  CONFIG_VSERVER_LEGACY
  56         if (!capable(CAP_CONTEXT) &&
  57                 /* dirty hack for capremove */
  58                 !(cmd==VCMD_new_s_context && id==-2))
  59                 return -EPERM;
  60 #else
  61         if (!capable(CAP_CONTEXT))
  62                 return -EPERM;
  63 #endif
  64
  65         switch (cmd) {
  66         case VCMD_get_version:
  67                 return vc_get_version(id);
  68
  69         case VCMD_dump_history:
  70 #ifdef  CONFIG_VSERVER_HISTORY
  71                 return vc_dump_history(id);
  72 #else
  73                 return -ENOSYS;
  74 #endif
  75
  76 #ifdef  CONFIG_VSERVER_LEGACY
  77         case VCMD_new_s_context:
  78                 return vc_new_s_context(id, data);
  79 #endif
  80 #ifdef  CONFIG_VSERVER_LEGACYNET
  81         case VCMD_set_ipv4root:
  82                 return vc_set_ipv4root(id, data);
  83 #endif
  84
  85         case VCMD_task_xid:
  86                 return vc_task_xid(id, data);
  87         case VCMD_vx_info:
  88                 return vc_vx_info(id, data);
  89
  90         case VCMD_task_nid:
  91                 return vc_task_nid(id, data);
  92         case VCMD_nx_info:
  93                 return vc_nx_info(id, data);
  94
  95         case VCMD_set_namespace:
  96                 return vc_set_namespace(id, data);
  97         case VCMD_cleanup_namespace:
  98                 return vc_cleanup_namespace(id, data);
  99         }
 100
 101         /* those are allowed while in setup too */
 102         if (!vx_check(0, VX_ADMIN|VX_WATCH) &&
 103                 !vx_flags(VXF_STATE_SETUP,0))
 104                 return -EPERM;
 105
 106 #ifdef  CONFIG_VSERVER_LEGACY
 107         switch (cmd) {
 108         case VCMD_set_cflags:
 109         case VCMD_set_ccaps:
 110                 if (vx_check(0, VX_WATCH))
 111                         return 0;
 112         }
 113 #endif
 114
 115         switch (cmd) {
 116         case VCMD_get_rlimit:
 117                 return vc_get_rlimit(id, data);
 118         case VCMD_set_rlimit:
 119                 return vc_set_rlimit(id, data);
 120         case VCMD_get_rlimit_mask:
 121                 return vc_get_rlimit_mask(id, data);
 122
 123         case VCMD_vx_get_vhi_name:
 124                 return vc_get_vhi_name(id, data);
 125         case VCMD_vx_set_vhi_name:
 126                 return vc_set_vhi_name(id, data);
 127
 128         case VCMD_set_cflags:
 129                 return vc_set_cflags(id, data);
 130         case VCMD_get_cflags:
 131                 return vc_get_cflags(id, data);
 132
 133         case VCMD_set_ccaps:
 134                 return vc_set_ccaps(id, data);
 135         case VCMD_get_ccaps:
 136                 return vc_get_ccaps(id, data);
 137
 138         case VCMD_set_nflags:
 139                 return vc_set_nflags(id, data);
 140         case VCMD_get_nflags:
 141                 return vc_get_nflags(id, data);
 142
 143         case VCMD_set_ncaps:
 144                 return vc_set_ncaps(id, data);
 145         case VCMD_get_ncaps:
 146                 return vc_get_ncaps(id, data);
 147
 148         case VCMD_set_sched_v2:
 149                 return vc_set_sched_v2(id, data);
 150         /* this is version 3 */
 151         case VCMD_set_sched:
 152                 return vc_set_sched(id, data);
 153
 154         case VCMD_add_dlimit:
 155                 return vc_add_dlimit(id, data);
 156         case VCMD_rem_dlimit:
 157                 return vc_rem_dlimit(id, data);
 158         case VCMD_set_dlimit:
 159                 return vc_set_dlimit(id, data);
 160         case VCMD_get_dlimit:
 161                 return vc_get_dlimit(id, data);
 162         }
 163
 164         /* below here only with VX_ADMIN */
 165         if (!vx_check(0, VX_ADMIN|VX_WATCH))
 166                 return -EPERM;
 167
 168         switch (cmd) {
 169         case VCMD_ctx_kill:
 170                 return vc_ctx_kill(id, data);
 171
 172         case VCMD_wait_exit:
 173                 return vc_wait_exit(id, data);
 174
 175         case VCMD_create_context:
 176 #ifdef  CONFIG_VSERVER_LEGACY
 177                 return vc_ctx_create(id, data);
 178 #else
 179                 return -ENOSYS;
 180 #endif
 181
 182         case VCMD_get_iattr:
 183                 return vc_get_iattr(id, data);
 184         case VCMD_set_iattr:
 185                 return vc_set_iattr(id, data);
 186
 187         case VCMD_enter_namespace:
 188                 return vc_enter_namespace(id, data);
 189
 190         case VCMD_ctx_create:
 191 #ifdef  CONFIG_VSERVER_LEGACY
 192                 if (id == 1) {
 193                         current->xid = 1;
 194                         return 1;
 195                 }
 196 #endif
 197                 return vc_ctx_create(id, data);
 198         case VCMD_ctx_migrate:
 199                 return vc_ctx_migrate(id, data);
 200
 201         case VCMD_net_create:
 202                 return vc_net_create(id, data);
 203         case VCMD_net_migrate:
 204                 return vc_net_migrate(id, data);
 205
 206         }
 207         return -ENOSYS;
 208 }
 209