X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=python%2Fvserverimpl.c;h=fbb94f53af77776150eaa19980e2b6f8d69a7987;hb=4a8a2e251efe43c3f65c525322f5c394486520e5;hp=f1662e7dd48c74d27c02bd758df093ad2f103aba;hpb=5235cef1c10e3ae954784eb5b75073c89660e881;p=util-vserver.git

diff --git a/python/vserverimpl.c b/python/vserverimpl.c
index f1662e7..fbb94f5 100644
--- a/python/vserverimpl.c
+++ b/python/vserverimpl.c
@@ -33,41 +33,131 @@ POSSIBILITY OF SUCH DAMAGE.
 
 #include <Python.h>
 
-#include "config.h"
-#include "compat.h"
-
-#include <stdio.h>
-#include <stdlib.h>
 #include <errno.h>
-#include <string.h>
-#include <sys/ioctl.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
 #include <stdint.h>
+#include <unistd.h>
 
+#include "config.h"
+#include "pathconfig.h"
+#include "planetlab.h"
+#include "virtual.h"
 #include "vserver.h"
 #include "vserver-internal.h"
-#include "sched_cmd.h"
-#include "virtual.h"
+
+#define NONE  ({ Py_INCREF(Py_None); Py_None; })
+
+static int
+get_rspec(PyObject *resources, rspec_t *rspec)
+{
+  int  result = -1;
+  PyObject  *cpu_share;
+  PyObject  *sched_flags = NULL;
+
+  if (!PyMapping_Check(resources))
+    {
+      PyErr_SetString(PyExc_TypeError, "invalid rspec");
+      return -1;
+    }
+
+  /* get CPU share */
+  if (!(cpu_share = PyMapping_GetItemString(resources, "nm_cpu_share")))
+    return -1;
+  if (!PyInt_Check(cpu_share))
+    {
+      PyErr_SetString(PyExc_TypeError, "nm_cpu_share not an integer");
+      goto out;
+    }
+  rspec->cpu_share = PyInt_AS_LONG(cpu_share);
+
+  /* check whether this share should be guaranteed */
+  rspec->cpu_sched_flags = VC_VXF_SCHED_FLAGS;
+  result = 0;
+  if ((sched_flags = PyMapping_GetItemString(resources, "nm_sched_flags")))
+    {
+      const char  *flagstr;
+
+      if (!(flagstr = PyString_AsString(sched_flags)))
+	result = -1;
+      else if (!strcmp(flagstr, "guaranteed"))
+	rspec->cpu_sched_flags &= ~VC_VXF_SCHED_SHARE;
+      Py_DECREF(sched_flags);
+    }
+  else
+    /* not an error if nm_sched_flags is missing */
+    PyErr_Clear();
+
+ out:
+  Py_DECREF(cpu_share);
+
+  return result;
+}
 
 /*
- * chcontext
+ * context create
  */
 static PyObject *
 vserver_chcontext(PyObject *self, PyObject *args)
 {
-  unsigned  xid;
-  unsigned  caps_remove = 0;
-
-  if (!PyArg_ParseTuple(args, "I|I", &xid, &caps_remove))
+  xid_t  ctx;
+  uint32_t  flags = 0;
+  uint32_t  bcaps = ~vc_get_insecurebcaps();
+  rspec_t  rspec = { 32, VC_VXF_SCHED_FLAGS, -1, -1 };
+  PyObject  *resources;
+
+  if (!PyArg_ParseTuple(args, "IO|K", &ctx, &resources, &flags) ||
+      get_rspec(resources, &rspec))
     return NULL;
 
-  if (vc_new_s_context(xid, caps_remove, 0) < 0)
+  if (pl_chcontext(ctx, flags, bcaps, &rspec))
     return PyErr_SetFromErrno(PyExc_OSError);
 
-  return Py_None;
+  return NONE;
+}
+
+static PyObject *
+vserver_set_rlimit(PyObject *self, PyObject *args) {
+	struct vc_rlimit limits;
+	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, "IiL", &xid, &resource, &limits.hard))
+		return NULL;
+
+	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 ret;
+}
+
+static PyObject *
+vserver_get_rlimit(PyObject *self, PyObject *args) {
+	struct vc_rlimit limits;
+	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))
+		return NULL;
+
+	if (vc_get_rlimit(xid, resource, &limits)==-1)
+		ret = PyErr_SetFromErrno(PyExc_OSError);
+	else
+		ret = Py_BuildValue("L",limits.hard);
+
+	return ret;
 }
 
 /*
@@ -76,68 +166,64 @@ vserver_chcontext(PyObject *self, PyObject *args)
 static PyObject *
 vserver_setsched(PyObject *self, PyObject *args)
 {
-  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))
+  xid_t  ctx;
+  rspec_t  rspec = { 32, VC_VXF_SCHED_FLAGS, -1, -1 };
+  PyObject  *resources;
+
+  if (!PyArg_ParseTuple(args, "IO", &ctx, &resources) ||
+      get_rspec(resources, &rspec))
     return NULL;
 
-  if (vc_set_sched(xid, &sched) == -1)
+  /* ESRCH indicates that there are no processes in the context */
+  if (pl_setsched(ctx, rspec.cpu_share, rspec.cpu_sched_flags) &&
+      errno != ESRCH)
     return PyErr_SetFromErrno(PyExc_OSError);
 
-  return Py_None;
+  return NONE;
 }
 
-/*
- * setsched
- */
+static PyObject *
+vserver_get_dlimit(PyObject *self, PyObject *args)
+{
+	PyObject *res;
+	char* path;
+	unsigned xid;
+	struct vcmd_ctx_dlimit_v0 data;
+	int r;
 
-/*  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 (!PyArg_ParseTuple(args, "si", &path,&xid))
+		return NULL;
 
-struct  vcmd_ctx_dlimit_base_v0 {
-	char *name;
-	uint32_t flags;
-};
+	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);
+	}
 
-struct  vcmd_ctx_dlimit_v0 {
-	char *name;
-	uint32_t space_used;			/* used space in kbytes */
-	uint32_t space_total;			/* maximum space in kbytes */
-	uint32_t inodes_used;			/* used inodes */
-	uint32_t inodes_total;			/* maximum inodes */
-	uint32_t reserved;			/* reserved for root in % */
-	uint32_t flags;
-};
+	return res;
+}
 
-#define CDLIM_UNSET             (0ULL)
-#define CDLIM_INFINITY          (~0ULL)
-#define CDLIM_KEEP              (~1ULL)
 
 static PyObject *
-vserver_dlimit(PyObject *self, PyObject *args)
+vserver_set_dlimit(PyObject *self, PyObject *args)
 {
-	PyObject *res;
 	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, "s(iiiii)", &path, 
+	if (!PyArg_ParseTuple(args, "siiiiii", &path,
+			      &xid,
 			      &data.space_used,
 			      &data.space_total,
 			      &data.inodes_used,
@@ -148,48 +234,86 @@ vserver_dlimit(PyObject *self, PyObject *args)
 	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){}
+	if ((vserver(VCMD_add_dlimit, xid, &init) && errno != EEXIST) ||
+            vserver(VCMD_set_dlimit, xid, &data))
+          return PyErr_SetFromErrno(PyExc_OSError);
 
-	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 NONE;	
+}
 
-	return res;
+static PyObject *
+vserver_unset_dlimit(PyObject *self, PyObject *args)
+{
+  char  *path;
+  unsigned  xid;
+  struct vcmd_ctx_dlimit_base_v0  init;
+
+  if (!PyArg_ParseTuple(args, "si", &path, &xid))
+    return NULL;
+
+  memset(&init, 0, sizeof(init));
+  init.name = path;
+  init.flags = 0;
+
+  if (vserver(VCMD_rem_dlimit, xid, &init) && errno != ESRCH)
+    return PyErr_SetFromErrno(PyExc_OSError);
+
+  return NONE;	
 }
 
+static PyObject *
+vserver_killall(PyObject *self, PyObject *args)
+{
+  xid_t  ctx;
+  int  sig;
+
+  if (!PyArg_ParseTuple(args, "Ii", &ctx, &sig))
+    return NULL;
+
+  if (vc_ctx_kill(ctx, 0, sig) && errno != ESRCH)
+    return PyErr_SetFromErrno(PyExc_OSError);
 
+  return NONE;
+}
 
 static PyMethodDef  methods[] = {
   { "chcontext", vserver_chcontext, METH_VARARGS,
-    "Change to the given vserver context" },
+    "chcontext to vserver with provided flags" },
   { "setsched", vserver_setsched, METH_VARARGS,
     "Change vserver scheduling attributes for given vserver context" },
-  { "dlimit", vserver_dlimit, METH_VARARGS,
+  { "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" },
+  { "killall", vserver_killall, METH_VARARGS,
+    "Send signal to all processes in vserver context" },
   { 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)CDLIM_KEEP);
+  PyModule_AddIntConstant(mod, "DLIMIT_INF", (int)CDLIM_INFINITY);
 }