add support for bcapabilities

[util-vserver.git] / python / vserverimpl.c

diff --git a/python/vserverimpl.c b/python/vserverimpl.c
index 77df9f5..5e4d491 100644 (file)
--- a/python/vserverimpl.c
+++ b/python/vserverimpl.c
@@ -4,17 +4,17 @@ Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
 are met: 
 
 modification, are permitted provided that the following conditions
 are met: 
 

-    * Redistributions of source code must retain the above copyright
-      notice, this list of conditions and the following disclaimer.
+* Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.

       
       

-    * Redistributions in binary form must reproduce the above
-      copyright notice, this list of conditions and the following
-      disclaimer in the documentation and/or other materials provided
-      with the distribution.
+* Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following
+disclaimer in the documentation and/or other materials provided
+with the distribution.

       
       

-    * Neither the name of the copyright holder nor the names of its
-      contributors may be used to endorse or promote products derived
-      from this software without specific prior written permission.
+* Neither the name of the copyright holder nor the names of its
+contributors may be used to endorse or promote products derived
+from this software without specific prior written permission.

       
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
       
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT


@@ -33,87 +33,146 @@ POSSIBILITY OF SUCH DAMAGE.
 
 #include <Python.h>
 
 
 #include <Python.h>
 

-#include "config.h"
-#include "compat.h"
-
-#include <stdio.h>
-#include <stdlib.h>

 #include <errno.h>
 #include <errno.h>

-#include <string.h>
-#include <sys/ioctl.h>
+#include <stdint.h>
+#include <sys/resource.h>

 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <sys/stat.h>

-#include <fcntl.h>

 #include <unistd.h>
 #include <unistd.h>

-#include <stdint.h>

 
 

+#include "config.h"
+#include "pathconfig.h"
+#include "virtual.h"

 #include "vserver.h"
 #include "vserver.h"

+#include "planetlab.h"

 #include "vserver-internal.h"
 #include "vserver-internal.h"

-#include "sched_cmd.h"
-#include "virtual.h"
+
+#define NONE  ({ Py_INCREF(Py_None); Py_None; })

 
 /*
 
 /*

- * chcontext
+ * context create

  */
 static PyObject *
 vserver_chcontext(PyObject *self, PyObject *args)
 {
  */
 static PyObject *
 vserver_chcontext(PyObject *self, PyObject *args)
 {

-  unsigned  xid;
-  unsigned  caps_remove = 0;
+  int  ctx_is_new;
+  xid_t  ctx;
+  uint_least64_t bcaps = 0;

 
 

-  if (!PyArg_ParseTuple(args, "I|I", &xid, &caps_remove))
+  if (!PyArg_ParseTuple(args, "I|K", &ctx, &bcaps))

     return NULL;
     return NULL;

+  bcaps |= ~vc_get_insecurebcaps();

 
 

-  if (vc_new_s_context(xid, caps_remove, 0) < 0)
+  if ((ctx_is_new = pl_chcontext(ctx, bcaps, 0)) < 0)

     return PyErr_SetFromErrno(PyExc_OSError);
 
     return PyErr_SetFromErrno(PyExc_OSError);
 

-  return Py_None;
+  return PyBool_FromLong(ctx_is_new);

 }
 
 static PyObject *
 }
 
 static PyObject *

-vserver_set_rlimit(PyObject *self, PyObject *args) {
-       struct vc_rlimit limits;
-       int xid, resource;
-       PyObject *ret;
+vserver_setup_done(PyObject *self, PyObject *args)
+{
+  xid_t  ctx;

 
 

-       limits.min = VC_LIM_KEEP;
-       limits.soft = VC_LIM_KEEP;
-       limits.hard = VC_LIM_KEEP;
+  if (!PyArg_ParseTuple(args, "I", &ctx))
+    return NULL;

 
 

-       if (!PyArg_ParseTuple(args, "iiL", &xid, &resource, &limits.hard))
-               return NULL;
+  if (pl_setup_done(ctx) < 0)
+    return PyErr_SetFromErrno(PyExc_OSError);

 
 

-       ret = Py_None;
-       if (vc_set_rlimit(xid, resource, &limits)) 
-               ret = PyErr_SetFromErrno(PyExc_OSError);
-       else if (vc_get_rlimit(xid, resource, &limits)==-1)
-               ret = PyErr_SetFromErrno(PyExc_OSError);
-       else
-               ret = Py_BuildValue("L",limits.hard);
+  return NONE;
+}

 
 

-       return ret;
+static PyObject *
+vserver_isrunning(PyObject *self, PyObject *args)
+{
+  xid_t  ctx;
+  PyObject *ret;
+  struct stat statbuf;
+  char fname[64];
+
+  if (!PyArg_ParseTuple(args, "I", &ctx))
+    return NULL;
+
+  sprintf(fname,"/proc/virtual/%d", ctx);
+
+  if(stat(&fname[0],&statbuf)==0)
+    ret = PyBool_FromLong(1);
+  else
+    ret = PyBool_FromLong(0);
+
+  return ret;
+}
+
+static PyObject *
+__vserver_get_rlimit(xid_t xid, int resource) {
+  struct vc_rlimit limits;
+  PyObject *ret;
+
+  errno = 0;
+  if (vc_get_rlimit(xid, resource, &limits)==-1)
+    ret = PyErr_SetFromErrno(PyExc_OSError);
+  else
+    ret = Py_BuildValue("LLL",limits.hard, limits.soft, limits.min);
+
+  return ret;

 }
 
 static PyObject *
 vserver_get_rlimit(PyObject *self, PyObject *args) {
 }
 
 static PyObject *
 vserver_get_rlimit(PyObject *self, PyObject *args) {

-       struct vc_rlimit limits;
-       int xid, resource;
-       PyObject *ret;
+  xid_t xid;
+  int resource;
+  PyObject *ret;

 
 

-       limits.min = VC_LIM_KEEP;
-       limits.soft = VC_LIM_KEEP;
-       limits.hard = VC_LIM_KEEP;
+  if (!PyArg_ParseTuple(args, "Ii", &xid, &resource))
+    ret = NULL;
+  else
+    ret = __vserver_get_rlimit(xid, resource);

 
 

-       if (!PyArg_ParseTuple(args, "ii", &xid, &resource))
-               return NULL;
+  return ret;
+}

 
 

-       ret = Py_None;
-       if (vc_get_rlimit(xid, resource, &limits)==-1)
-               ret = PyErr_SetFromErrno(PyExc_OSError);
-       else
-               ret = Py_BuildValue("L",limits.hard);
+static PyObject *
+vserver_set_rlimit(PyObject *self, PyObject *args) {
+  struct vc_rlimit limits;
+  struct rlimit lim;
+  xid_t xid;
+  int resource, lresource;
+  PyObject *ret;

 
 

-       return ret;
+  limits.min = VC_LIM_KEEP;
+  limits.soft = VC_LIM_KEEP;
+  limits.hard = VC_LIM_KEEP;
+
+  if (!PyArg_ParseTuple(args, "IiLLL", &xid, &resource, &limits.hard, &limits.soft, &limits.min))
+    return NULL;
+
+  lresource = resource;
+  switch (resource) {
+  case VC_VLIMIT_NSOCK:
+  case VC_VLIMIT_ANON:
+  case VC_VLIMIT_SHMEM:
+    goto do_vc_set_rlimit;
+  case VC_VLIMIT_OPENFD:
+    lresource = RLIMIT_NOFILE;
+    break;
+  default:
+    break;
+  }
+
+  getrlimit(lresource,&lim);
+  if (adjust_lim(&limits,&lim)) {
+    setrlimit(lresource, &lim);
+  }
+
+ do_vc_set_rlimit:
+  errno = 0;
+  if (vc_set_rlimit(xid, resource, &limits)==-1) 
+    ret = PyErr_SetFromErrno(PyExc_OSError);
+  else
+    ret = __vserver_get_rlimit(xid, resource);
+
+  return ret;

 }
 
 /*
 }
 
 /*


@@ -122,125 +181,248 @@ vserver_get_rlimit(PyObject *self, PyObject *args) {
 static PyObject *
 vserver_setsched(PyObject *self, PyObject *args)
 {
 static PyObject *
 vserver_setsched(PyObject *self, PyObject *args)
 {

+  xid_t  ctx;
+  uint32_t  cpu_share;
+  uint32_t  cpu_sched_flags = VC_VXF_SCHED_FLAGS;
+
+  if (!PyArg_ParseTuple(args, "II|I", &ctx, &cpu_share, &cpu_sched_flags))
+    return NULL;
+
+  /* ESRCH indicates that there are no processes in the context */
+  if (pl_setsched(ctx, cpu_share, cpu_sched_flags) &&
+      errno != ESRCH)
+    return PyErr_SetFromErrno(PyExc_OSError);
+
+  return NONE;
+}
+
+static PyObject *
+vserver_get_dlimit(PyObject *self, PyObject *args)
+{
+  PyObject *res;
+  char* path;
+  unsigned xid;
+  struct vc_ctx_dlimit data;
+  int r;
+
+  if (!PyArg_ParseTuple(args, "si", &path,&xid))
+    return NULL;
+
+  memset(&data, 0, sizeof(data));
+  r = vc_get_dlimit(path, xid, 0, &data);
+  if (r>=0) {
+    res = Py_BuildValue("(i,i,i,i,i)",
+                       data.space_used,
+                       data.space_total,
+                       data.inodes_used,
+                       data.inodes_total,
+                       data.reserved);
+  } else {
+    res = PyErr_SetFromErrno(PyExc_OSError);
+  }
+
+  return res;
+}
+
+
+static PyObject *
+vserver_set_dlimit(PyObject *self, PyObject *args)
+{
+  char* path;
+  unsigned xid;
+  struct vc_ctx_dlimit data;
+
+  memset(&data,0,sizeof(data));
+  if (!PyArg_ParseTuple(args, "siiiiii", &path,
+                       &xid,
+                       &data.space_used,
+                       &data.space_total,
+                       &data.inodes_used,
+                       &data.inodes_total,
+                       &data.reserved))
+    return NULL;
+
+  if ((vc_add_dlimit(path, xid, 0) && errno != EEXIST) ||
+      vc_set_dlimit(path, xid, 0, &data))
+    return PyErr_SetFromErrno(PyExc_OSError);
+
+  return NONE; 
+}
+
+static PyObject *
+vserver_unset_dlimit(PyObject *self, PyObject *args)
+{
+  char  *path;

   unsigned  xid;
   unsigned  xid;

-  struct vc_set_sched sched;
-
-  sched.set_mask = (VC_VXSM_FILL_RATE | 
-                   VC_VXSM_INTERVAL | 
-                   VC_VXSM_TOKENS_MIN | 
-                   VC_VXSM_TOKENS_MAX);
-
-  if (!PyArg_ParseTuple(args, "I|I|I|I|I", &xid, 
-                       &sched.fill_rate,
-                       &sched.interval,
-                       &sched.tokens_min,
-                       &sched.tokens_max))
+
+  if (!PyArg_ParseTuple(args, "si", &path, &xid))

     return NULL;
 
     return NULL;
 

-  if (vc_set_sched(xid, &sched) == -1)
+  if (vc_rem_dlimit(path, xid, 0) && errno != ESRCH)

     return PyErr_SetFromErrno(PyExc_OSError);
 
     return PyErr_SetFromErrno(PyExc_OSError);
 

-  return Py_None;
+  return NONE; 

 }
 
 }
 

-/*
- * setsched
- */
+static PyObject *
+vserver_killall(PyObject *self, PyObject *args)
+{
+  xid_t  ctx;
+  int  sig;
+
+  if (!PyArg_ParseTuple(args, "Ii", &ctx, &sig))
+    return NULL;

 
 

-/*  inode vserver commands */
-#define VCMD_add_dlimit                VC_CMD(DLIMIT, 1, 0)
-#define VCMD_rem_dlimit                VC_CMD(DLIMIT, 2, 0)
-#define VCMD_set_dlimit                VC_CMD(DLIMIT, 5, 0)
-#define VCMD_get_dlimit                VC_CMD(DLIMIT, 6, 0)
+  if (vc_ctx_kill(ctx, 0, sig) && errno != ESRCH)
+    return PyErr_SetFromErrno(PyExc_OSError);

 
 

-#define CDLIM_UNSET             (0ULL)
-#define CDLIM_INFINITY          (~0ULL)
-#define CDLIM_KEEP              (~1ULL)
+  return NONE;
+}

 
 static PyObject *
 
 static PyObject *

-vserver_get_dlimit(PyObject *self, PyObject *args)
+vserver_set_bcaps(PyObject *self, PyObject *args)
+{
+  xid_t ctx;
+  struct vc_ctx_caps caps;
+
+  if (!PyArg_ParseTuple(args, "IK", &ctx, &caps.bcaps))
+    return NULL;
+
+  caps.bmask = vc_get_insecurebcaps();
+  caps.cmask = caps.ccaps = 0;
+  if (vc_set_ccaps(ctx, &caps) == -1 && errno != ESRCH)
+    return PyErr_SetFromErrno(PyExc_OSError);
+
+  return NONE;
+}
+
+static PyObject *
+vserver_text2bcaps(PyObject *self, PyObject *args)

 {
 {

-       PyObject *res;
-       char* path;
-       unsigned xid;
-       struct vcmd_ctx_dlimit_v0 data;
-       int r;
-
-       if (!PyArg_ParseTuple(args, "si", &path,&xid))
-               return NULL;
-
-       memset(&data, 0, sizeof(data));
-       data.name = path;
-       data.flags = 0;
-       r = vserver(VCMD_get_dlimit, xid, &data);
-       if (r>=0) {
-               res = Py_BuildValue("(i,i,i,i,i)",
-                                   data.space_used,
-                                   data.space_total,
-                                   data.inodes_used,
-                                   data.inodes_total,
-                                   data.reserved);
-       } else {
-               res = PyErr_SetFromErrno(PyExc_OSError);
-       }
-
-       return res;
+  struct vc_ctx_caps caps = { .bcaps = 0 };
+  const char *list;
+  int len;
+  struct vc_err_listparser err;
+
+  if (!PyArg_ParseTuple(args, "s#", &list, &len))
+    return NULL;
+
+  if (vc_list2bcap(list, len, &err, &caps) == -1)
+    return NULL;
+
+  return Py_BuildValue("K", caps.bcaps);

 }
 
 }
 

+static PyObject *
+vserver_get_bcaps(PyObject *self, PyObject *args)
+{
+  xid_t ctx;
+  struct vc_ctx_caps caps;
+
+  if (!PyArg_ParseTuple(args, "I", &ctx))
+    return NULL;
+
+  if (vc_get_ccaps(ctx, &caps) == -1) {
+    if (errno != -ESRCH)
+      return PyErr_SetFromErrno(PyExc_OSError);
+    else
+      caps.bcaps = 0;
+  }
+
+  return Py_BuildValue("K", caps.bcaps & vc_get_insecurebcaps());
+}

 
 static PyObject *
 
 static PyObject *

-vserver_set_dlimit(PyObject *self, PyObject *args)
+vserver_bcaps2text(PyObject *self, PyObject *args)

 {
 {

-       char* path;
-       unsigned xid;
-       struct vcmd_ctx_dlimit_base_v0 init;
-       struct vcmd_ctx_dlimit_v0 data;
-       int r;
-
-       memset(&data,0,sizeof(data));
-       if (!PyArg_ParseTuple(args, "siiiiii", &path,
-                             &xid,
-                             &data.space_used,
-                             &data.space_total,
-                             &data.inodes_used,
-                             &data.inodes_total,
-                             &data.reserved))
-               return NULL;
-
-       data.name = path;
-       data.flags = 0;
-
-       memset(&init, 0, sizeof(init));
-       init.name = path;
-       init.flags = 0;
-
-       r = vserver(VCMD_rem_dlimit, xid, &init);
-       if (r<0){}
-       r = vserver(VCMD_add_dlimit, xid, &init);
-       if (r<0){}
-       r = vserver(VCMD_set_dlimit, xid, &data);
-       if (r<0){}
-       return Py_None; 
+  struct vc_ctx_caps caps = { .bcaps = 0 };
+  PyObject *list;
+  const char *cap;
+
+  if (!PyArg_ParseTuple(args, "K", &caps.bcaps))
+    return NULL;
+
+  list = PyString_FromString("");
+
+  while ((cap = vc_lobcap2text(&caps.bcaps)) != NULL) {
+    if (list == NULL)
+      break;
+    PyString_ConcatAndDel(&list, PyString_FromFormat(
+                         (PyString_Size(list) > 0 ? ",CAP_%s" : "CAP_%s" ),
+                         cap));
+  }
+
+  return list;

 }
 
 static PyMethodDef  methods[] = {
   { "chcontext", vserver_chcontext, METH_VARARGS,
 }
 
 static PyMethodDef  methods[] = {
   { "chcontext", vserver_chcontext, METH_VARARGS,

-    "Change to the given vserver context" },
+    "chcontext to vserver with provided flags" },
+  { "setup_done", vserver_setup_done, METH_VARARGS,
+    "Release vserver setup lock" },

   { "setsched", vserver_setsched, METH_VARARGS,
     "Change vserver scheduling attributes for given vserver context" },
   { "setdlimit", vserver_set_dlimit, METH_VARARGS,
     "Set disk limits for given vserver context" },
   { "setsched", vserver_setsched, METH_VARARGS,
     "Change vserver scheduling attributes for given vserver context" },
   { "setdlimit", vserver_set_dlimit, METH_VARARGS,
     "Set disk limits for given vserver context" },

+  { "unsetdlimit", vserver_unset_dlimit, METH_VARARGS,
+    "Remove disk limits for given vserver context" },

   { "getdlimit", vserver_get_dlimit, METH_VARARGS,
     "Get disk limits for given vserver context" },
   { "setrlimit", vserver_set_rlimit, METH_VARARGS,
     "Set resource limits for given resource of a vserver context" },
   { "getrlimit", vserver_get_rlimit, METH_VARARGS,
     "Get resource limits for given resource of a vserver context" },
   { "getdlimit", vserver_get_dlimit, METH_VARARGS,
     "Get disk limits for given vserver context" },
   { "setrlimit", vserver_set_rlimit, METH_VARARGS,
     "Set resource limits for given resource of a vserver context" },
   { "getrlimit", vserver_get_rlimit, METH_VARARGS,
     "Get resource limits for given resource of a vserver context" },

+  { "killall", vserver_killall, METH_VARARGS,
+    "Send signal to all processes in vserver context" },
+  { "isrunning", vserver_isrunning, METH_VARARGS,
+    "Check if vserver is running"},
+  { "setbcaps", vserver_set_bcaps, METH_VARARGS,
+    "Set POSIX capabilities of a vserver context" },
+  { "getbcaps", vserver_get_bcaps, METH_VARARGS,
+    "Get POSIX capabilities of a vserver context" },
+  { "text2bcaps", vserver_text2bcaps, METH_VARARGS,
+    "Translate a string of capabilities to a bitmap" },
+  { "bcaps2text", vserver_bcaps2text, METH_VARARGS,
+    "Translate a capability-bitmap into a string" },

   { NULL, NULL, 0, NULL }
 };
 
 PyMODINIT_FUNC
 initvserverimpl(void)
 {
   { NULL, NULL, 0, NULL }
 };
 
 PyMODINIT_FUNC
 initvserverimpl(void)
 {

-  Py_InitModule("vserverimpl", methods);
+  PyObject  *mod;
+
+  mod = Py_InitModule("vserverimpl", methods);
+
+  /* export the set of 'safe' capabilities */
+  PyModule_AddIntConstant(mod, "CAP_SAFE", ~vc_get_insecurebcaps());
+
+  /* export the default vserver directory */
+  PyModule_AddStringConstant(mod, "VSERVER_BASEDIR", DEFAULT_VSERVERDIR);
+
+  /* export limit-related constants */
+  PyModule_AddIntConstant(mod, "DLIMIT_KEEP", (int)VC_CDLIM_KEEP);
+  PyModule_AddIntConstant(mod, "DLIMIT_INF", (int)VC_CDLIM_INFINITY);
+  PyModule_AddIntConstant(mod, "VC_LIM_KEEP", (int)VC_LIM_KEEP);
+
+  PyModule_AddIntConstant(mod, "RLIMIT_CPU", (int)RLIMIT_CPU);
+  PyModule_AddIntConstant(mod, "RLIMIT_RSS", (int)RLIMIT_RSS);
+  PyModule_AddIntConstant(mod, "RLIMIT_NPROC", (int)RLIMIT_NPROC);
+  PyModule_AddIntConstant(mod, "RLIMIT_NOFILE", (int)RLIMIT_NOFILE);
+  PyModule_AddIntConstant(mod, "RLIMIT_MEMLOCK", (int)RLIMIT_MEMLOCK);
+  PyModule_AddIntConstant(mod, "RLIMIT_AS", (int)RLIMIT_AS);
+  PyModule_AddIntConstant(mod, "RLIMIT_LOCKS", (int)RLIMIT_LOCKS);
+
+  PyModule_AddIntConstant(mod, "RLIMIT_SIGPENDING", (int)RLIMIT_SIGPENDING);
+  PyModule_AddIntConstant(mod, "RLIMIT_MSGQUEUE", (int)RLIMIT_MSGQUEUE);
+
+  PyModule_AddIntConstant(mod, "VLIMIT_NSOCK", (int)VC_VLIMIT_NSOCK);
+  PyModule_AddIntConstant(mod, "VLIMIT_OPENFD", (int)VC_VLIMIT_OPENFD);
+  PyModule_AddIntConstant(mod, "VLIMIT_ANON", (int)VC_VLIMIT_ANON);
+  PyModule_AddIntConstant(mod, "VLIMIT_SHMEM", (int)VC_VLIMIT_SHMEM);
+
+  /* scheduler flags */
+  PyModule_AddIntConstant(mod,
+                         "VS_SCHED_CPU_GUARANTEED",
+                         VS_SCHED_CPU_GUARANTEED);

 }
 }