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[Libvir] [PATCH]OpenVZ Enhancements - Cleaned up



Hi,

Attached are the OpenVZ driver enhancements. Cleanups have been done according to Daniel .V's suggestions. Please see my previous mail for summary.


Cheers,
Shuveb Hussain
http://www.binarykarma.com


Index: src/openvz_conf.c
===================================================================
RCS file: /data/cvs/libvirt/src/openvz_conf.c,v
retrieving revision 1.4
diff -u -r1.4 openvz_conf.c
--- src/openvz_conf.c	9 Aug 2007 20:19:12 -0000	1.4
+++ src/openvz_conf.c	31 Aug 2007 07:27:02 -0000
@@ -3,6 +3,7 @@
  *
  * Copyright (C) 2006, 2007 Binary Karma
  * Copyright (C) 2006 Shuveb Hussain
+ * Copyright (C) 2007 Anoop Joe Cyriac
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -18,7 +19,10 @@
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
  *
- * Author: Shuveb Hussain <shuveb binarykarma com>
+ * Authors: 
+ * Shuveb Hussain <shuveb binarykarma com>
+ * Anoop Joe Cyriac <anoop binarykarma com>
+ *
  */
 
 #ifdef WITH_OPENVZ
@@ -31,6 +35,10 @@
 #include <dirent.h>
 #include <strings.h>
 #include <time.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <limits.h>
+#include <errno.h>
 
 #include <libxml/parser.h>
 #include <libxml/tree.h>
@@ -39,11 +47,21 @@
 
 #include <libvirt/virterror.h>
 
-#include "openvz_conf.h"
 #include "openvz_driver.h"
+#include "openvz_conf.h"
 #include "uuid.h"
 #include "buf.h"
 
+#include <string.h>
+
+static char *openvzLocateConfDir(void);
+static void error (virConnectPtr conn, virErrorNumber code, const char *info);
+static struct openvz_vm_def *openvzParseXML(virConnectPtr conn, xmlDocPtr xml);
+static int openvzGetVPSUUID(int vpsid, char *uuidstr);
+static int openvzSetUUID(int vpsid);
+static struct openvz_vm *openvzLoadConfig(struct openvz_driver *driver,
+                                          const char *path,
+                                          const char *xmlStr);
 
 /* For errors internal to this library. */
 static void
@@ -98,30 +116,181 @@
     return NULL;
 }
 
-/* Free all memory associated with a struct openvz_vm object */
-void 
-openvzFreeVMDef(struct openvz_vm_def *def) {
-    struct ovz_quota *quota = def->fs.quota;
-    struct ovz_ip *ip = def->net.ips;
-    struct ovz_ns *ns = def->net.ns;
-
-    while (quota) {
-        struct ovz_quota *prev = quota;
-        quota = quota->next;
-        free(prev);
-    }
-    while (ip) {
-        struct ovz_ip *prev = ip;
-        ip = ip->next;
-        free(prev);
-    }
-    while (ns) {
-        struct ovz_ns *prev = ns;
-        ns = ns->next;
-        free(prev);
+int
+strtoI(char *str)
+{
+    int base = 10;
+    char *endptr;
+    int val;
+
+    val = (int) strtol(str, &endptr, base);
+
+    /* Check for various possible errors */
+    if ((endptr == str)         /* "No digits were found" */
+        ||((*endptr != '\0') 
+            && (*endptr != ' ')) /*"Name contain characters other than integers" */ )
+        return 0;
+    return val;
+}
+
+void
+openvzRemoveInactiveVM(struct openvz_driver *driver, struct openvz_vm *vm)
+{
+    driver->num_inactive--;
+    openvzFreeVM(driver, vm, 1);
+}
+
+/* Free all memory associated with a openvz_vm_def structure */
+void
+openvzFreeVMDef(struct openvz_vm_def *def)
+{
+    if (def) {
+        struct ovz_quota *quota = def->fs.quota;
+        struct ovz_ip *ip = def->net.ips;
+        struct ovz_ns *ns = def->net.ns;
+
+        while (quota) {
+            struct ovz_quota *prev = quota;
+
+            quota = quota->next;
+            free(prev);
+        }
+        while (ip) {
+            struct ovz_ip *prev = ip;
+
+            ip = ip->next;
+            free(prev);
+        }
+        while (ns) {
+            struct ovz_ns *prev = ns;
+
+            ns = ns->next;
+            free(prev);
+        }
+
+        free(def);
+        def = NULL;
+    }
+}
+
+/* Free all memory associated with a openvz_vm structure 
+ * @checkCallee == 0 then openvzFreeDriver() is callee else some other function
+ */
+void
+openvzFreeVM(struct openvz_driver *driver, struct openvz_vm *vm,
+             int checkCallee)
+{
+    struct openvz_vm *vms;
+
+    if (!vm && !driver)
+        return;
+    vms = driver->vms;
+    if (checkCallee) {
+        if (vms == vm)
+            driver->vms = vm->next;
+        else {
+            while (vms) {
+                struct openvz_vm *prev = vms;
+
+                vms = vms->next;
+                if (vms == vm) {
+                    prev->next = vms->next;
+                    break;
+                }
+            }
+        }
+    }
+    if (vms) {
+        openvzFreeVMDef(vm->vmdef);
+        free(vm);
+        vm = NULL;
+    }
+}
+
+/* Free all memory associated with a openvz_driver structure */
+void
+openvzFreeDriver(struct openvz_driver *driver)
+{
+    struct openvz_vm *next;
+
+    if (!driver)
+        return;
+    if (driver->vms)
+        for(next = driver->vms->next; driver->vms; driver->vms = next)
+            openvzFreeVM(driver, driver->vms, 0);
+    free(driver);
+    driver = NULL;
+}
+
+struct openvz_vm *
+openvzAssignVMDef(virConnectPtr conn,
+                  struct openvz_driver *driver, struct openvz_vm_def *def)
+{
+    struct openvz_vm *vm = NULL;
+
+    if (!driver || !def)
+        return NULL;
+
+    if ((vm = openvzFindVMByName(driver, def->name))) {
+        if (!openvzIsActiveVM(vm)) {
+            openvzFreeVMDef(vm->vmdef);
+            vm->vmdef = def;
+        }
+        else
+        {
+            openvzLog(OPENVZ_ERR, "Error already an active OPENVZ VM having id '%s'", 
+                    def->name);
+            openvzFreeVMDef(def);
+            return NULL; // can't redefine an active domain 
+        }
+
+        return vm;
     }
 
-    free(def);
+    if (!(vm = calloc(1, sizeof(struct openvz_vm)))) {
+        openvzFreeVMDef(def);    
+        error(conn, VIR_ERR_NO_MEMORY, "vm");
+        return NULL;
+    }
+
+    vm->vpsid = -1;     // -1 needed for to represent inactiveness of domain before 'start'
+    vm->status = VIR_DOMAIN_SHUTOFF;
+    vm->vmdef = def;
+    vm->next = driver->vms;
+
+    driver->vms = vm;
+    driver->num_inactive++;
+
+    return vm;
+}
+
+struct openvz_vm_def 
+*openvzParseVMDef(virConnectPtr conn,
+                 const char *xmlStr, const char *displayName)
+{
+    xmlDocPtr xml;
+    struct openvz_vm_def *def = NULL;
+
+    xml = xmlReadDoc(BAD_CAST xmlStr, displayName ? displayName : "domain.xml", NULL, 
+            XML_PARSE_NOENT | XML_PARSE_NONET | XML_PARSE_NOERROR | XML_PARSE_NOWARNING);
+    if (!xml) {
+        error(conn, VIR_ERR_XML_ERROR, NULL);
+        return NULL;
+    }
+    if (!(xml->name = calloc(1, PATH_MAX))) {
+        openvzLog(OPENVZ_ERR, "Error in allocating memory to store xml URI");
+        xmlFreeDoc(xml);
+        return NULL;
+    }
+    if (displayName)
+        strncpy(xml->name, displayName, PATH_MAX - 1);
+    else
+        strncpy(xml->name, "domain.xml", PATH_MAX - 1);
+
+    def = openvzParseXML(conn, xml);
+    xmlFreeDoc(xml);
+
+    return def;
 }
 
 /*
@@ -136,6 +305,8 @@
     xmlXPathContextPtr ctxt = NULL;
     xmlXPathObjectPtr obj = NULL;
     struct openvz_vm_def *def;
+    struct ovz_ip *ovzIp;
+    struct ovz_ns *ovzNs;
 
     if (!(def = calloc(1, sizeof(struct openvz_vm_def)))) {
         error(conn, VIR_ERR_NO_MEMORY, "xmlXPathContext");
@@ -143,6 +314,7 @@
     }
 
     /* Prepare parser / xpath context */
+
     root = xmlDocGetRootElement(xml);
     if ((root == NULL) || (!xmlStrEqual(root->name, BAD_CAST "domain"))) {
         error(conn, VIR_ERR_INTERNAL_ERROR, "incorrect root element");
@@ -155,8 +327,7 @@
         goto bail_out;
     }
 
-
-    /* Find out what type of QEMU virtualization to use */
+    /* Find out what type of OPENVZ virtualization to use */
     if (!(prop = xmlGetProp(root, BAD_CAST "type"))) {
         error(conn, VIR_ERR_INTERNAL_ERROR, "missing domain type attribute");
         goto bail_out;
@@ -171,16 +342,19 @@
 
     /* Extract domain name */
     obj = xmlXPathEval(BAD_CAST "string(/domain/name[1])", ctxt);
-    if ((obj == NULL) || (obj->type != XPATH_NUMBER) ||
+    if ((obj == NULL) || (obj->type != XPATH_STRING) ||
         (obj->stringval == NULL) || (obj->stringval[0] == 0)) {
         error(conn, VIR_ERR_INTERNAL_ERROR,"invalid domain name");
         goto bail_out;
     }
-    if (0/* check if VPS ID is < 101 */) {
-        error(conn, VIR_ERR_INTERNAL_ERROR, "VPS ID is less than 101");
+    
+    /* rejecting VPS ID <= OPENVZ_RSRV_VM_LIMIT for they are reserved */
+    if (strtoI(BAD_CAST obj->stringval) <= OPENVZ_RSRV_VM_LIMIT) {
+        error(conn, VIR_ERR_INTERNAL_ERROR, 
+                "VPS ID Error (must be an integer greater than 100");
         goto bail_out;
     }
-    strcpy(def->name, (const char *)obj->stringval);
+    strncpy(def->name, (const char *) obj->stringval, OPENVZ_NAME_MAX);
     xmlXPathFreeObject(obj);
 
     /* Extract domain uuid */
@@ -188,9 +362,9 @@
     if ((obj == NULL) || (obj->type != XPATH_STRING) ||
         (obj->stringval == NULL) || (obj->stringval[0] == 0)) {
         int err;
+
         if ((err = virUUIDGenerate(def->uuid))) {
-            error(conn, VIR_ERR_INTERNAL_ERROR,
-                             "Failed to generate UUID");
+            error(conn, VIR_ERR_INTERNAL_ERROR, "Failed to generate UUID");
             goto bail_out;
         }
     } else if (virUUIDParse((const char *)obj->stringval, def->uuid) < 0) {
@@ -200,21 +374,133 @@
     xmlXPathFreeObject(obj);
 
     /* Extract filesystem info */
-    obj = xmlXPathEval(BAD_CAST "string(/domain/filesystem/template[1])", ctxt);
-    if ((obj == NULL) || (obj->type != XPATH_STRING) ||
-        (obj->stringval == NULL) || (obj->stringval[0] == 0)) {
+    obj = xmlXPathEval(BAD_CAST "string(/domain/container/filesystem/template[1])", ctxt);
+    if ((obj == NULL) || (obj->type != XPATH_STRING) ||	(obj->stringval == NULL) 
+            || (obj->stringval[0] == 0)) {
         error(conn, VIR_ERR_OS_TYPE, NULL);
         goto bail_out;
     }
-    strcpy(def->fs.tmpl, (const char *)obj->stringval);
+    strncpy(def->fs.tmpl, (const char *) obj->stringval, OPENVZ_TMPL_MAX);
     xmlXPathFreeObject(obj);
 
     /* TODO Add quota processing here */
 
     /* TODO analysis of the network devices */
 
-    xmlXPathFreeContext(ctxt);
 
+    /*          Extract network                 */
+        /*              Extract ipaddress           */
+    obj = xmlXPathEval(BAD_CAST"string(/domain/container/network/ipaddress[1])", ctxt);
+    if ((obj == NULL) || (obj->type != XPATH_STRING) || (obj->stringval == NULL) 
+            || (obj->stringval[0] == 0)) {
+        openvzLog(OPENVZ_WARN, "No IP address in the given xml config file '%s'", 
+                xml->name);
+    }
+    if (xmlStrlen(obj->stringval) >= (OPENVZ_IP_MAX)) {
+        char errorMessage[OPENVZ_MAX_ERROR_LEN];
+
+        snprintf(errorMessage, OPENVZ_MAX_ERROR_LEN - 1, "%s", "ipaddress length too long");
+        error(conn, VIR_ERR_INTERNAL_ERROR, errorMessage);
+        goto bail_out;
+    }
+    if (!(ovzIp = calloc(1, sizeof(struct ovz_ip)))) {
+        openvzLog(OPENVZ_ERR, "Failed to Create Memory for 'ovz_ip' structure");
+        goto bail_out;
+    }
+    strncpy(ovzIp->ip, (const char *) obj->stringval, OPENVZ_IP_MAX);
+    def->net.ips = ovzIp;
+    xmlXPathFreeObject(obj);
+
+        /*              Extract netmask             */
+    obj = xmlXPathEval(BAD_CAST "string(/domain/container/network/netmask[1])", ctxt);
+    if ((obj == NULL) || (obj->type != XPATH_STRING)
+        || (obj->stringval == NULL) || (obj->stringval[0] == 0))
+        openvzLog(OPENVZ_WARN, "No Netmask address in the given xml config file '%s'", 
+                xml->name);
+    
+    if (strlen((const char *) obj->stringval) >= (OPENVZ_IP_MAX)) {
+        char errorMessage[OPENVZ_MAX_ERROR_LEN];
+
+        snprintf(errorMessage, OPENVZ_MAX_ERROR_LEN - 1, "%s", "netmask length too long");
+        error(conn, VIR_ERR_INTERNAL_ERROR, errorMessage);
+        goto bail_out;
+    }
+    strncpy(def->net.ips->netmask, (const char *) obj->stringval, OPENVZ_IP_MAX);
+    xmlXPathFreeObject(obj);
+
+        /*              Extract hostname            */
+    obj = xmlXPathEval(BAD_CAST "string(/domain/container/network/hostname[1])", ctxt);
+    if ((obj == NULL) || (obj->type != XPATH_STRING) || (obj->stringval == NULL) 
+            || (obj->stringval[0] == 0))
+        openvzLog(OPENVZ_WARN, "No hostname in the given xml config file '%s'", xml->name);
+    
+    if (strlen((const char *) obj->stringval) >= (OPENVZ_HOSTNAME_MAX - 1)) {
+        char errorMessage[OPENVZ_MAX_ERROR_LEN];
+
+        snprintf(errorMessage, OPENVZ_MAX_ERROR_LEN - 1, "%s", "hostname length too long");
+        error(conn, VIR_ERR_INTERNAL_ERROR, errorMessage);
+        goto bail_out;
+    }
+    strncpy(def->net.hostname, (const char *) obj->stringval, OPENVZ_HOSTNAME_MAX - 1);
+    xmlXPathFreeObject(obj);
+
+        /*              Extract gateway             */
+    obj = xmlXPathEval(BAD_CAST"string(/domain/container/network/gateway[1])", ctxt);
+    if ((obj == NULL) || (obj->type != XPATH_STRING) || (obj->stringval == NULL) 
+            || (obj->stringval[0] == 0))
+        openvzLog(OPENVZ_WARN, "No Gateway address in the given xml config file '%s'", 
+                xml->name);
+    
+    if (strlen((const char *) obj->stringval) >= (OPENVZ_IP_MAX)) {
+        char errorMessage[OPENVZ_MAX_ERROR_LEN];
+
+        snprintf(errorMessage, OPENVZ_MAX_ERROR_LEN - 1, "%s", "gateway length too long");
+        error(conn, VIR_ERR_INTERNAL_ERROR, errorMessage);
+        goto bail_out;
+    }
+    strncpy(def->net.def_gw, (const char *) obj->stringval, OPENVZ_IP_MAX);
+    xmlXPathFreeObject(obj);
+
+        /*              Extract nameserver          */
+    obj = xmlXPathEval(BAD_CAST "string(/domain/container/network/nameserver[1])", ctxt);
+    if ((obj == NULL) || (obj->type != XPATH_STRING) || (obj->stringval == NULL) 
+            || (obj->stringval[0] == 0))
+        openvzLog(OPENVZ_WARN, "No Nameserver address inthe given xml config file '%s'", 
+                xml->name);
+    
+    if (strlen((const char *) obj->stringval) >= (OPENVZ_IP_MAX)) {
+        char errorMessage[OPENVZ_MAX_ERROR_LEN];
+
+        snprintf(errorMessage, OPENVZ_MAX_ERROR_LEN - 1, "%s", "nameserver length too long");
+        error(conn, VIR_ERR_INTERNAL_ERROR, errorMessage);
+        goto bail_out;
+    }
+    if (!(ovzNs = calloc(1, sizeof(struct ovz_ns)))) {
+        openvzLog(OPENVZ_ERR, "Failed to Create Memory for 'ovz_ns' structure");
+        goto bail_out;
+    }
+    strncpy(ovzNs->ip, (const char *) obj->stringval, OPENVZ_IP_MAX);
+    def->net.ns = ovzNs;
+    xmlXPathFreeObject(obj);
+
+    /*          Extract profile         */
+    obj = xmlXPathEval(BAD_CAST "string(/domain/container/profile[1])", ctxt);
+    if ((obj == NULL) || (obj->type != XPATH_STRING) || (obj->stringval == NULL) 
+            || (obj->stringval[0] == 0)) {
+        error(conn, VIR_ERR_INTERNAL_ERROR, NULL);
+        goto bail_out;
+    }
+    if (strlen((const char *) obj->stringval) >= (OPENVZ_PROFILE_MAX - 1)) {
+        char errorMessage[OPENVZ_MAX_ERROR_LEN];
+
+        snprintf(errorMessage, OPENVZ_MAX_ERROR_LEN - 1, "%s", "profile length too long");
+        error(conn, VIR_ERR_INTERNAL_ERROR, errorMessage);
+        goto bail_out;
+    }
+    strncpy(def->profile, (const char *) obj->stringval, OPENVZ_PROFILE_MAX - 1);
+    xmlXPathFreeObject(obj);
+
+    xmlXPathFreeContext(ctxt);
     return def;
 
  bail_out:
@@ -225,28 +511,8 @@
     if (ctxt)
         xmlXPathFreeContext(ctxt);
     openvzFreeVMDef(def);
-    return NULL;
-}
-
-struct openvz_vm_def *
-openvzParseVMDef(virConnectPtr conn,
-                const char *xmlStr,
-                const char *displayName) {
-    xmlDocPtr xml;
-    struct openvz_vm_def *def = NULL;
-
-    if (!(xml = xmlReadDoc(BAD_CAST xmlStr, displayName ? displayName : "domain.xml", NULL,
-                           XML_PARSE_NOENT | XML_PARSE_NONET |
-                           XML_PARSE_NOERROR | XML_PARSE_NOWARNING))) {
-        error(conn, VIR_ERR_XML_ERROR, NULL);
-        return NULL;
-    }
-
-    def = openvzParseXML(conn, xml);
-
-    xmlFreeDoc(xml);
 
-    return def;
+    return NULL;
 }
 
 struct openvz_vm *
@@ -271,9 +537,9 @@
     }
     pnext = &vm; 
     while(!feof(fp)) { 
-        *pnext = malloc(sizeof(struct openvz_vm));
+        *pnext = calloc(1, sizeof(struct openvz_vm));
         if(!*pnext) {
-            error(conn, VIR_ERR_INTERNAL_ERROR, "malloc failed");
+            error(conn, VIR_ERR_INTERNAL_ERROR, "calloc failed");
             return NULL;
         }
         
@@ -293,9 +559,9 @@
                                         thought this doesn't make sense for OpenVZ */
         }
 
-        vmdef = malloc(sizeof(struct openvz_vm_def));
+        vmdef = calloc(1, sizeof(struct openvz_vm_def));
         if(!vmdef) {
-            error(conn, VIR_ERR_INTERNAL_ERROR, "malloc failed");
+            error(conn, VIR_ERR_INTERNAL_ERROR, "calloc failed");
             return NULL;
         }
         
@@ -356,11 +622,11 @@
 }
 
 static int 
-openvzGetVPSUUID(int vpsid, char *uuidbuf)
+openvzGetVPSUUID(int vpsid, char *uuidstr)
 {
     char conf_file[PATH_MAX];
     char line[1024];
-    char uuid[1024];
+    char uuidbuf[1024];
     char iden[1024];
     char *conf_dir;
     int fd, ret;
@@ -379,13 +645,13 @@
             return -1;
 
         if(ret == 0) { /* EoF, UUID was not found */
-            uuidbuf[0] = (char)NULL;
+            uuidstr[0] = (char)NULL;
             break;
         }
 
-        sscanf(line, "%s %s\n", iden, uuid);
+        sscanf(line, "%s %s\n", iden, uuidbuf);
         if(!strcmp(iden, "#UUID:")) {
-            strncpy(uuidbuf, uuid, VIR_UUID_STRING_BUFLEN);
+            strncpy(uuidstr, uuidbuf, VIR_UUID_STRING_BUFLEN);
             break;
         }
     }
@@ -413,17 +679,17 @@
     if(fd == -1)
         return -1;
 
-    ret = openvzGetVPSUUID(vpsid, uuid);
+    ret = openvzGetVPSUUID(vpsid, uuidstr);
     if(ret == -1)
         return -1;
 
-    if(uuid[0] == (int)NULL) {
+    if(uuidstr[0] == (int)NULL) {
         virUUIDGenerate(uuid);
         virUUIDFormat(uuid, uuidstr);
 
         lseek(fd, 0, SEEK_END);
         write(fd, "\n#UUID: ", 8);
-        write(fd, uuid, strlen(uuid));
+        write(fd, uuidstr, strlen(uuidstr));
         write(fd, "\n", 1);
         close(fd);
     }
@@ -467,4 +733,3 @@
 }
 
 #endif
-
Index: src/openvz_conf.h
===================================================================
RCS file: /data/cvs/libvirt/src/openvz_conf.h,v
retrieving revision 1.3
diff -u -r1.3 openvz_conf.h
--- src/openvz_conf.h	9 Aug 2007 20:19:12 -0000	1.3
+++ src/openvz_conf.h	31 Aug 2007 07:06:15 -0000
@@ -3,6 +3,7 @@
  *
  * Copyright (C) 2006, 2007 Binary Karma.
  * Copyright (C) 2006 Shuveb Hussain
+ * Copyright (C) 2007 Anoop Joe Cyriac
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -18,7 +19,10 @@
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
  *
- * Author: Shuveb Hussain <shuveb binarykarma com>
+ * Authors: 
+ * Shuveb Hussain <shuveb binarykarma com>
+ * Anoop Joe Cyriac <anoop binarykarma com>
+ *
  */
 
 #ifndef OPENVZ_CONF_H
@@ -26,12 +30,19 @@
 
 #include "openvz_driver.h"
 
+enum { OPENVZ_WARN, OPENVZ_ERR };
+
 #define OPENVZ_NAME_MAX 8
 #define OPENVZ_TMPL_MAX 256
 #define OPENVZ_UNAME_MAX    32
 #define OPENVZ_IP_MAX   16
 #define OPENVZ_HOSTNAME_MAX 256
 #define OPENVZ_PROFILE_MAX  256
+#define OPENVZ_MAX_ERROR_LEN	 1024
+#define OPENVZ_MAX_XML_LEN	 4096
+#define OPENVZ_MAX_QUOTA	 8
+#define OPENVZ_MAX_XPathEval_LEN 256
+#define OPENVZ_RSRV_VM_LIMIT 100
 
 enum openvz_quota{
     VM_LEVEL = 0,
@@ -93,21 +104,30 @@
     struct openvz_vm *next;
 };
 
-static char *openvzLocateConfDir(void);
+static inline int
+openvzIsActiveVM(struct openvz_vm *vm)
+{
+    return vm->vpsid != -1;
+}
+
 int openvz_readline(int fd, char *ptr, int maxlen);
-static void error (virConnectPtr conn, virErrorNumber code, const char *info);
 struct openvz_vm *openvzFindVMByID(const struct openvz_driver *driver, int id); 
 struct openvz_vm *openvzFindVMByUUID(const struct openvz_driver *driver, 
                                             const unsigned char *uuid);
-struct openvz_vm *openvzFindVMByName(const struct openvz_driver *driver,
-                                   const char *name);
-void openvzFreeVMDef(struct openvz_vm_def *def);
-static struct openvz_vm_def *openvzParseXML(virConnectPtr conn, xmlDocPtr xml);
+
+struct openvz_vm *openvzFindVMByName(const struct openvz_driver *driver, const char *name);
 struct openvz_vm_def *openvzParseVMDef(virConnectPtr conn, const char *xmlStr,
                                             const char *displayName);
+
+struct openvz_vm *openvzAssignVMDef(virConnectPtr conn, struct openvz_driver *driver,
+                                    struct openvz_vm_def *def);
+
 struct openvz_vm *openvzGetVPSInfo(virConnectPtr conn);
 void openvzGenerateUUID(unsigned char *uuid);
-static int openvzGetVPSUUID(int vpsid, char *uuidbuf);
-static int openvzSetUUID(int vpsid);
 int openvzAssignUUIDs(void);
+void openvzRemoveInactiveVM(struct openvz_driver *driver, struct openvz_vm *vm);
+void openvzFreeDriver(struct openvz_driver *driver);
+void openvzFreeVM(struct openvz_driver *driver, struct openvz_vm *vm, int checkCallee);
+void openvzFreeVMDef(struct openvz_vm_def *def);
+int strtoI(char *str);
 #endif /* OPENVZ_CONF_H */
Index: src/openvz_driver.c
===================================================================
RCS file: /data/cvs/libvirt/src/openvz_driver.c,v
retrieving revision 1.4
diff -u -r1.4 openvz_driver.c
--- src/openvz_driver.c	14 Aug 2007 01:23:59 -0000	1.4
+++ src/openvz_driver.c	3 Sep 2007 10:18:34 -0000
@@ -3,6 +3,7 @@
  *
  * Copyright (C) 2006, 2007 Binary Karma
  * Copyright (C) 2006 Shuveb Hussain
+ * Copyright (C) 2007 Anoop Joe Cyriac
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -18,7 +19,10 @@
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
  *
- * Author: Shuveb Hussain <shuveb binarykarma com>
+ * Authors: 
+ * Shuveb Hussain <shuveb binarykarma com>
+ * Anoop Joe Cyriac <anoop binarykarma com>
+ *
  */
 
 #ifdef WITH_OPENVZ
@@ -50,15 +54,16 @@
 
 #include <libvirt/virterror.h>
 
+#include "openvz_driver.h"
 #include "event.h"
 #include "buf.h"
 #include "util.h"
-#include "openvz_driver.h"
 #include "openvz_conf.h"
 #include "nodeinfo.h"
 
-
-#define openvzLog(level, msg...) fprintf(stderr, msg)
+#define OPENVZ_MAX_ARG 28
+#define CMDBUF_LEN 1488
+#define CMDOP_LEN 288
 
 static virDomainPtr openvzDomainLookupByID(virConnectPtr conn, int id);
 static char *openvzGetOSType(virDomainPtr dom);
@@ -71,6 +76,7 @@
 static int openvzDomainCreate(virDomainPtr dom);
 static virDrvOpenStatus openvzOpen(virConnectPtr conn, const char *name,
                            int flags ATTRIBUTE_UNUSED);
+
 static int openvzClose(virConnectPtr conn);
 static const char *openvzGetType(virConnectPtr conn ATTRIBUTE_UNUSED);
 static int openvzListDomains(virConnectPtr conn, int *ids, int nids);
@@ -82,10 +88,49 @@
 static int openvzReload(void);
 static int openvzActive(void);
 static int openvzCloseNetwork(virConnectPtr conn);
-static virDrvOpenStatus openvzOpenNetwork(virConnectPtr conn, const char *name ATTRIBUTE_UNUSED,
-                                         int flags ATTRIBUTE_UNUSED);
+static virDrvOpenStatus openvzOpenNetwork(virConnectPtr conn, 
+        const char *name ATTRIBUTE_UNUSED, int flags ATTRIBUTE_UNUSED);
+
+static virDomainPtr openvzDomainDefineXML(virConnectPtr conn, const char *xml);
+static virDomainPtr openvzDomainCreateLinux(virConnectPtr conn, const char *xml, 
+        unsigned int flags ATTRIBUTE_UNUSED);
+
+static int openvzDomainUndefine(virDomainPtr dom);
+static int convCmdbufExec(char cmdbuf[], char *cmdExec[]);
+static void cmdExecFree(char *cmdExec[]);
+
 struct openvz_driver ovz_driver;
 
+static int convCmdbufExec(char cmdbuf[], char *cmdExec[])
+{
+    int i=0, limit = OPENVZ_MAX_ARG - 1;
+    char cmdWord[CMDOP_LEN];
+    while(*cmdbuf)
+    {
+        if(i >= limit)
+        {
+            cmdExec[i] = NULL;
+            return -1;
+        }
+        sscanf(cmdbuf, "%s", cmdWord);
+        cmdbuf += strlen(cmdWord);
+        while(*cmdbuf == ' ') cmdbuf++;
+        cmdExec[i++] = strdup(cmdWord);
+    }
+    cmdExec[i] = NULL;
+    return i;
+}
+
+static void cmdExecFree(char *cmdExec[])
+{
+    int i=-1;
+    while(cmdExec[++i])
+    {
+        free(cmdExec[i]);
+        cmdExec[i] = NULL;
+    }
+}
+
 /* For errors internal to this library. */
 static void
 error (virConnectPtr conn, virErrorNumber code, const char *info)
@@ -122,7 +167,7 @@
 static char *openvzGetOSType(virDomainPtr dom)
 {
     /* OpenVZ runs on Linux and runs only Linux */
-    return strdup("Linux");
+    return strdup("linux");
 }
 
 
@@ -133,7 +178,7 @@
     virDomainPtr dom;
 
     if (!vm) {
-        error(conn, VIR_ERR_INTERNAL_ERROR, "no domain with matching uuid");
+        error(conn, VIR_ERR_INVALID_DOMAIN, "no domain with matching uuid");
         return NULL;
     }
 
@@ -172,6 +217,7 @@
                        virDomainInfoPtr info) {
     struct openvz_driver *driver = (struct openvz_driver *)dom->conn->privateData;
     struct openvz_vm *vm = openvzFindVMByUUID(driver, dom->uuid);
+
     if (!vm) {
         error(dom->conn, VIR_ERR_INVALID_DOMAIN, "no domain with matching uuid");
         return -1;
@@ -188,8 +234,10 @@
 }
 
 static int openvzDomainShutdown(virDomainPtr dom) {
-    char cmdbuf[1024];
+    char cmdbuf[CMDBUF_LEN];
     int ret;
+    char *cmdExec[OPENVZ_MAX_ARG];
+    int pid, outfd, errfd;
     struct openvz_driver *driver = (struct openvz_driver *)dom->conn->privateData;
     struct openvz_vm *vm = openvzFindVMByID(driver, dom->id);
 
@@ -202,24 +250,36 @@
         error(dom->conn, VIR_ERR_OPERATION_DENIED, "domain is not in running state");
         return -1;
     }
-
-    snprintf(cmdbuf, 1024, VZCTL " stop %d >/dev/null 2>&1", dom->id);
-    ret = system(cmdbuf);
-    if(WEXITSTATUS(ret)) {
-        error(dom->conn, VIR_ERR_OPERATION_FAILED, "could not shutdown domain");
+    snprintf(cmdbuf, CMDBUF_LEN - 1, VZCTL " stop %d ", dom->id);
+    
+    if((ret = convCmdbufExec(cmdbuf, cmdExec)) == -1) 
+    {
+        openvzLog(OPENVZ_ERR, "Error in parsing Options to OPENVZ");
+        goto bail_out;
+    }    
+        
+    ret = virExec(dom->conn, (char **)cmdExec, &pid, -1, &outfd, &errfd);
+    if(ret == -1) {
+        error(dom->conn, VIR_ERR_INTERNAL_ERROR, "Could not exec " VZLIST);
         return -1;
     }
+    
     vm->vpsid = -1;
     vm->status = VIR_DOMAIN_SHUTOFF;
     ovz_driver.num_inactive ++;
     ovz_driver.num_active --;
     
+bail_out:
+    cmdExecFree(cmdExec);
+
     return ret;
 }
 
 static int openvzDomainReboot(virDomainPtr dom, unsigned int flags) {
-    char cmdbuf[1024];
+    char cmdbuf[CMDBUF_LEN];
     int ret;
+    char *cmdExec[OPENVZ_MAX_ARG];
+    int pid, outfd, errfd;
     struct openvz_driver *driver = (struct openvz_driver *)dom->conn->privateData;
     struct openvz_vm *vm = openvzFindVMByID(driver, dom->id);
 
@@ -232,22 +292,187 @@
         error(dom->conn, VIR_ERR_OPERATION_DENIED, "domain is not in running state");
         return -1;
     }
-
-    snprintf(cmdbuf, 1024, VZCTL " restart %d >/dev/null 2>&1", dom->id);
-    ret = system(cmdbuf);
-    if(WEXITSTATUS(ret)) {
-        error(dom->conn, VIR_ERR_OPERATION_FAILED, "could not reboot domain");
+    snprintf(cmdbuf, CMDBUF_LEN - 1, VZCTL " restart %d ", dom->id);
+    
+    if((ret = convCmdbufExec(cmdbuf, cmdExec)) == -1) 
+    {
+        openvzLog(OPENVZ_ERR, "Error in parsing Options to OPENVZ");
+        goto bail_out1;
+    }
+    ret = virExec(dom->conn, (char **)cmdExec, &pid, -1, &outfd, &errfd);
+    if(ret == -1) {
+        error(dom->conn, VIR_ERR_INTERNAL_ERROR, "Could not exec " VZLIST);
         return -1;
     }
+   
+bail_out1:    
+    cmdExecFree(cmdExec);
     
     return ret;
 }
 
-static int openvzDomainCreate(virDomainPtr dom) {
-    char cmdbuf[1024];
+static virDomainPtr
+openvzDomainDefineXML(virConnectPtr conn, const char *xml)
+{
+    struct openvz_driver *driver = (struct openvz_driver *) conn->privateData;
+    struct openvz_vm_def *vmdef = NULL;
+    struct openvz_vm *vm = NULL;
+    virDomainPtr dom;
+    char cmdbuf[CMDBUF_LEN], cmdOption[CMDOP_LEN], *cmdExec[OPENVZ_MAX_ARG];
+    int ret, pid, outfd, errfd;
+
+    if (!(vmdef = openvzParseVMDef(conn, xml, NULL)))
+        goto bail_out2;
+
+    vm = openvzFindVMByID(driver, strtoI(vmdef->name));
+    if (vm) {
+        openvzLog(OPENVZ_ERR, "Already an OPENVZ VM active with the id '%s'", 
+                vmdef->name);
+        goto bail_out2;
+    }
+    if (!(vm = openvzAssignVMDef(conn, driver, vmdef))) {
+        openvzFreeVMDef(vmdef);
+        openvzLog(OPENVZ_ERR, "Error creating OPENVZ VM");
+    }
+
+    snprintf(cmdbuf, CMDBUF_LEN - 1, VZCTL " create %s", vmdef->name);
+    if ((vmdef->fs.tmpl && *(vmdef->fs.tmpl))) {
+        snprintf(cmdOption, CMDOP_LEN - 1, " --ostemplate %s", vmdef->fs.tmpl);
+        strcat(cmdbuf, cmdOption);
+    }
+    if ((vmdef->profile && *(vmdef->profile))) {
+        snprintf(cmdOption, CMDOP_LEN - 1, " --config %s", vmdef->profile);
+        strcat(cmdbuf, cmdOption);
+    }
+    if ((vmdef->net.ips->ip && *(vmdef->net.ips->ip))) {
+        snprintf(cmdOption, CMDOP_LEN - 1, " --ipadd %s", vmdef->net.ips->ip);
+        strcat(cmdbuf, cmdOption);
+    }
+    if ((vmdef->net.hostname && *(vmdef->net.hostname))) {
+        snprintf(cmdOption, CMDOP_LEN - 1, " --hostname %s", vmdef->net.hostname);
+        strcat(cmdbuf, cmdOption);
+    }
+
+    if((ret = convCmdbufExec(cmdbuf, cmdExec)) == -1) 
+    {
+        openvzLog(OPENVZ_ERR, "Error in parsing Options to OPENVZ");
+        goto bail_out2;
+    }
+    ret = virExec(conn, (char **)cmdExec, &pid, -1, &outfd, &errfd);
+    if(ret == -1) {
+        error(conn, VIR_ERR_INTERNAL_ERROR, "Could not exec " VZLIST);
+        goto bail_out2;
+    }
+    
+    waitpid(pid, NULL, 0);
+    cmdExecFree(cmdExec);
+    
+    dom = virGetDomain(conn, vm->vmdef->name, vm->vmdef->uuid);
+    if (dom)
+        dom->id = vm->vpsid;
+    return dom;
+bail_out2:
+    cmdExecFree(cmdExec);
+    return NULL;
+}
+
+static virDomainPtr
+openvzDomainCreateLinux(virConnectPtr conn, const char *xml,
+                        unsigned int flags ATTRIBUTE_UNUSED)
+{
+    struct openvz_vm_def *vmdef = NULL;
+    struct openvz_vm *vm = NULL;
+    virDomainPtr dom;
+    struct openvz_driver *driver = (struct openvz_driver *) conn->privateData;
+    char cmdbuf[CMDBUF_LEN], cmdOption[CMDOP_LEN], *cmdExec[OPENVZ_MAX_ARG];
+    int ret, pid, outfd, errfd;
+
+    if (!(vmdef = openvzParseVMDef(conn, xml, NULL)))
+        return NULL;
+
+    vm = openvzFindVMByID(driver, strtoI(vmdef->name));
+    if (vm) {
+        openvzFreeVMDef(vmdef);
+        openvzLog(OPENVZ_ERR, "Already an OPENVZ VM defined with the id '%d'", 
+                strtoI(vmdef->name));
+        return NULL;
+    }
+    if (!(vm = openvzAssignVMDef(conn, driver, vmdef))) {
+        openvzLog(OPENVZ_ERR, "Error creating OPENVZ VM");
+        return NULL;
+    }
+
+    snprintf(cmdbuf, CMDBUF_LEN - 1, VZCTL " create %s", vmdef->name);
+    if ((vmdef->fs.tmpl && *(vmdef->fs.tmpl))) {
+        snprintf(cmdOption, CMDOP_LEN - 1, " --ostemplate %s", vmdef->fs.tmpl);
+        strcat(cmdbuf, cmdOption);
+    }
+    if ((vmdef->profile && *(vmdef->profile))) {
+        snprintf(cmdOption, CMDOP_LEN - 1, " --config %s", vmdef->profile);
+        strcat(cmdbuf, cmdOption);
+    }
+    if ((vmdef->net.ips->ip && *(vmdef->net.ips->ip))) {
+        snprintf(cmdOption, CMDOP_LEN - 1, " --ipadd %s", vmdef->net.ips->ip);
+        strcat(cmdbuf, cmdOption);
+    }
+    if ((vmdef->net.hostname && *(vmdef->net.hostname))) {
+        snprintf(cmdOption, CMDOP_LEN - 1, " --hostname %s", vmdef->net.hostname);
+        strcat(cmdbuf, cmdOption);
+    }
+
+    if((ret = convCmdbufExec(cmdbuf, cmdExec)) == -1) 
+    {
+        openvzLog(OPENVZ_ERR, "Error in parsing Options to OPENVZ");
+        goto bail_out3;
+    }
+    ret = virExec(conn, (char **)cmdExec, &pid, -1, &outfd, &errfd);
+    if(ret == -1) {
+        error(conn, VIR_ERR_INTERNAL_ERROR, "Could not exec " VZLIST);
+        return NULL;
+    }
+    
+    waitpid(pid, NULL, 0);
+    cmdExecFree(cmdExec);
+
+    snprintf(cmdbuf, CMDBUF_LEN - 1, VZCTL " start %s ", vmdef->name);
+
+    if((ret = convCmdbufExec(cmdbuf, cmdExec)) == -1) 
+    {
+        openvzLog(OPENVZ_ERR, "Error in parsing Options to OPENVZ");
+        goto bail_out3;
+    }
+    ret = virExec(conn, (char **)cmdExec, &pid, -1, &outfd, &errfd);
+    if(ret == -1) {
+        error(conn, VIR_ERR_INTERNAL_ERROR, "Could not exec " VZLIST);
+        return NULL;
+    }
+    
+    sscanf(vmdef->name, "%d", &vm->vpsid);
+    vm->status = VIR_DOMAIN_RUNNING;
+    ovz_driver.num_inactive--;
+    ovz_driver.num_active++;
+
+    waitpid(pid, NULL, 0);
+    cmdExecFree(cmdExec);
+
+    dom = virGetDomain(conn, vm->vmdef->name, vm->vmdef->uuid);
+    if (dom)
+        dom->id = vm->vpsid;
+    return dom;
+bail_out3:
+    cmdExecFree(cmdExec);    
+    return NULL;
+}
+
+static int
+openvzDomainCreate(virDomainPtr dom)
+{
+    char cmdbuf[CMDBUF_LEN];
     int ret;
+    char *cmdExec[OPENVZ_MAX_ARG] ;
+    int pid, outfd, errfd;
     struct openvz_driver *driver = (struct openvz_driver *)dom->conn->privateData;
-    struct openvz_vm *vm = openvzFindVMByID(driver, dom->id);
+    struct openvz_vm *vm = openvzFindVMByName(driver, dom->name);
     struct openvz_vm_def *vmdef;
 
     if (!vm) {
@@ -261,17 +486,66 @@
     }
 
     vmdef = vm->vmdef;
-    snprintf(cmdbuf, 1024, VZCTL " start %s >/dev/null 2>&1", vmdef->name);
-    ret = system(cmdbuf);
-    if(WEXITSTATUS(ret)) {
-        error(dom->conn, VIR_ERR_OPERATION_FAILED, "could not start domain");
+    snprintf(cmdbuf, CMDBUF_LEN - 1, VZCTL " start %s ", vmdef->name);
+    
+    if((ret = convCmdbufExec(cmdbuf, cmdExec)) == -1) 
+    {
+        openvzLog(OPENVZ_ERR, "Error in parsing Options to OPENVZ");
+        goto bail_out4;
+    }
+    ret = virExec(dom->conn, (char **)cmdExec, &pid, -1, &outfd, &errfd);
+    if(ret == -1) {
+        error(dom->conn, VIR_ERR_INTERNAL_ERROR, "Could not exec " VZLIST);
         return -1;
     }
+    
     sscanf(vmdef->name, "%d", &vm->vpsid); 
     vm->status = VIR_DOMAIN_RUNNING;
     ovz_driver.num_inactive --;
     ovz_driver.num_active ++;
+    
+    waitpid(pid, NULL, 0);
+bail_out4:    
+    cmdExecFree(cmdExec);
+
+    return ret;
+}
+
+static int
+openvzDomainUndefine(virDomainPtr dom)
+{
+    char cmdbuf[CMDBUF_LEN], *cmdExec[OPENVZ_MAX_ARG];
+    int ret, pid, outfd, errfd;
+    virConnectPtr conn= dom->conn;
+    struct openvz_driver *driver = (struct openvz_driver *) conn->privateData;
+    struct openvz_vm *vm = openvzFindVMByUUID(driver, dom->uuid);
 
+    if (!vm) {
+        error(conn, VIR_ERR_INVALID_DOMAIN, "no domain with matching uuid");
+        return -1;
+    }
+
+    if (openvzIsActiveVM(vm)) {
+        error(conn, VIR_ERR_INTERNAL_ERROR, "cannot delete active domain");
+        return -1;
+    }
+    snprintf(cmdbuf, CMDBUF_LEN - 1, VZCTL " destroy %s ", vm->vmdef->name);
+    
+    if((ret = convCmdbufExec(cmdbuf, cmdExec)) == -1) 
+    {
+        openvzLog(OPENVZ_ERR, "Error in parsing Options to OPENVZ");
+        goto bail_out5;
+    }
+    ret = virExec(conn, (char **)cmdExec, &pid, -1, &outfd, &errfd);
+    if(ret == -1) {
+        error(conn, VIR_ERR_INTERNAL_ERROR, "Could not exec " VZLIST);
+        return -1;
+    }
+    
+    waitpid(pid, NULL, 0);
+    openvzRemoveInactiveVM(driver, vm);
+bail_out5:    
+    cmdExecFree(cmdExec);
     return ret;
 }
 
@@ -306,7 +580,6 @@
     
     struct openvz_driver *driver = (struct openvz_driver *)conn->privateData;
     struct openvz_vm *vm = driver->vms;
-    
 
     while(vm) {
         openvzFreeVMDef(vm->vmdef);
@@ -328,13 +601,11 @@
     return strdup("OpenVZ");
 }
 
-
 static int openvzGetNodeInfo(virConnectPtr conn,
                              virNodeInfoPtr nodeinfo) {
     return virNodeInfoPopulate(conn, nodeinfo);
 }
 
-
 static int openvzListDomains(virConnectPtr conn, int *ids, int nids) {
     int got = 0;
     int veid, pid, outfd, errfd;
@@ -370,7 +641,7 @@
     int veid, pid, outfd, errfd, ret;
     char vpsname[OPENVZ_NAME_MAX];
     char buf[32];
-    const char *cmd[] = {VZLIST, "-ovpsid", "-H", NULL};
+    const char *cmd[] = {VZLIST, "-ovpsid", "-H", "-S", NULL};
 
     /* the -S options lists only stopped domains */
     ret = virExec(conn, (char **)cmd, &pid, -1, &outfd, &errfd);
@@ -391,7 +662,6 @@
     return got;
 }
 
-
 static int openvzNumDefinedDomains(virConnectPtr conn) {
     return ovz_driver.num_inactive; 
 }
@@ -427,13 +697,13 @@
     return VIR_DRV_OPEN_SUCCESS;
 }
 
-
 static virDriver openvzDriver = {
     VIR_DRV_OPENVZ,
     "OPENVZ",
     LIBVIR_VERSION_NUMBER,
     openvzOpen, /* open */
     openvzClose, /* close */
+    NULL, /* supports_feature */
     openvzGetType, /* type */
     NULL, /* version */
     NULL, /* hostname */
@@ -443,7 +713,7 @@
     NULL, /* getCapabilities */
     openvzListDomains, /* listDomains */
     openvzNumDomains, /* numOfDomains */
-    NULL, /* domainCreateLinux */
+    openvzDomainCreateLinux, /* domainCreateLinux */
     openvzDomainLookupByID, /* domainLookupByID */
     openvzDomainLookupByUUID, /* domainLookupByUUID */
     openvzDomainLookupByName, /* domainLookupByName */
@@ -468,8 +738,8 @@
     openvzListDefinedDomains, /* listDomains */
     openvzNumDefinedDomains, /* numOfDomains */
     openvzDomainCreate, /* domainCreate */
-    NULL, /* domainDefineXML */
-    NULL, /* domainUndefine */
+    openvzDomainDefineXML, /* domainDefineXML */
+    openvzDomainUndefine, /* domainUndefine */
     NULL, /* domainAttachDevice */
     NULL, /* domainDetachDevice */
     NULL, /* domainGetAutostart */
@@ -480,6 +750,7 @@
 };
 
 static virNetworkDriver openvzNetworkDriver = {
+    NULL, /* name */	
     openvzOpenNetwork, /* open */
     openvzCloseNetwork, /* close */
     NULL, /* numOfNetworks */
Index: src/openvz_driver.h
===================================================================
RCS file: /data/cvs/libvirt/src/openvz_driver.h,v
retrieving revision 1.1
diff -u -r1.1 openvz_driver.h
--- src/openvz_driver.h	17 Jul 2007 13:27:26 -0000	1.1
+++ src/openvz_driver.h	31 Aug 2007 07:05:54 -0000
@@ -1,8 +1,9 @@
 /*
  * openvz_driver.h: core driver methods for managing OpenVZ VPSs
  *
- * Copyright (C) 2006, 2007 Binary Karma.
+ * Copyright (C) 2006, 2007 Binary Karma
  * Copyright (C) 2006 Shuveb Hussain
+ * Copyright (C) 2007 Anoop Joe Cyriac
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -18,7 +19,10 @@
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
  *
- * Author: Shuveb Hussain <shuveb binarykarma com>
+ * Authors: 
+ * Shuveb Hussain <shuveb binarykarma com>
+ * Anoop Joe Cyriac <anoop binarykarma com>
+ *
  */
 
 
@@ -39,6 +43,14 @@
 
 int openvzRegister(void);
 
+#define openvzLog(level, msg...) { if(level == OPENVZ_WARN) \
+					fprintf(stderr, "\nWARNING: ");\
+				else \
+					fprintf(stderr, "\nERROR: ");\
+				fprintf(stderr, "\n\t");\
+				fprintf(stderr, msg);\
+				fprintf(stderr, "\n"); }
+
 #endif
 
 

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