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a3adcce795
libvirt/src/openvz/openvz_conf.c
Daniel P. Berrange a3adcce795 Convert virDomainObjListPtr to use a hash of domain objects 
The current virDomainObjListPtr object stores domain objects in
an array. This means that to find a particular objects requires
O(n) time, and more critically acquiring O(n) mutex locks.

The new impl replaces the array with a virHashTable, keyed off
UUID. Finding a object based on UUID is now O(1) time, and only
requires a single mutex lock. Finding by name/id is unchanged
in complexity.

In changing this, all code which iterates over the array had
to be updated to use a hash table iterator function callback.
Several of the functions which were identically duplicating
across all drivers were pulled into domain_conf.c

* src/conf/domain_conf.h, src/conf/domain_conf.c: Change
  virDomainObjListPtr to use virHashTable. Add a initializer
  method virDomainObjListInit, and rename virDomainObjListFree
  to virDomainObjListDeinit, since its not actually freeing
  the container, only its contents. Also add some convenient
  methods virDomainObjListGetInactiveNames,
  virDomainObjListGetActiveIDs and virDomainObjListNumOfDomains
  which can be used to implement the correspondingly named
  public API entry points in drivers
* src/libvirt_private.syms: Export new methods from domain_conf.h
* src/lxc/lxc_driver.c, src/opennebula/one_driver.c,
  src/openvz/openvz_conf.c, src/openvz/openvz_driver.c,
  src/qemu/qemu_driver.c, src/test/test_driver.c,
  src/uml/uml_driver.c, src/vbox/vbox_tmpl.c: Update all code
  to deal with hash tables instead of arrays for domains
2009-10-28 20:05:55 +00:00

936 lines
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/*
* openvz_conf.c: config functions for managing OpenVZ VEs
*
* 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
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Authors:
* Shuveb Hussain <shuveb@binarykarma.com>
* Anoop Joe Cyriac <anoop@binarykarma.com>
*
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <dirent.h>
#include <strings.h>
#include <time.h>
#include <sys/stat.h>
#include <unistd.h>
#include <limits.h>
#include <errno.h>
#include <string.h>
#include <sys/utsname.h>
#include <sys/wait.h>
#include "virterror_internal.h"
#include "openvz_conf.h"
#include "uuid.h"
#include "buf.h"
#include "memory.h"
#include "util.h"
#include "nodeinfo.h"
#define VIR_FROM_THIS VIR_FROM_OPENVZ
static char *openvzLocateConfDir(void);
static int openvzGetVPSUUID(int vpsid, char *uuidstr, size_t len);
static int openvzLocateConfFile(int vpsid, char *conffile, int maxlen, const char *ext);
static int openvzAssignUUIDs(void);
int
strtoI(const char *str)
{
int val;
if (virStrToLong_i(str, NULL, 10, &val) < 0)
return 0 ;
return val;
}
static int
openvzExtractVersionInfo(const char *cmd, int *retversion)
{
const char *const vzarg[] = { cmd, "--help", NULL };
const char *const vzenv[] = { "LC_ALL=C", NULL };
pid_t child;
int newstdout = -1;
int ret = -1, status;
unsigned int major, minor, micro;
unsigned int version;
if (retversion)
*retversion = 0;
if (virExec(NULL, vzarg, vzenv, NULL,
&child, -1, &newstdout, NULL, VIR_EXEC_NONE) < 0)
return -1;
char *help = NULL;
int len = virFileReadLimFD(newstdout, 4096, &help);
if (len < 0)
goto cleanup2;
if (sscanf(help, "vzctl version %u.%u.%u",
&major, &minor, &micro) != 3) {
goto cleanup2;
}
version = (major * 1000 * 1000) + (minor * 1000) + micro;
if (retversion)
*retversion = version;
ret = 0;
cleanup2:
VIR_FREE(help);
if (close(newstdout) < 0)
ret = -1;
rewait:
if (waitpid(child, &status, 0) != child) {
if (errno == EINTR)
goto rewait;
ret = -1;
}
return ret;
}
int openvzExtractVersion(virConnectPtr conn,
struct openvz_driver *driver)
{
if (driver->version > 0)
return 0;
if (openvzExtractVersionInfo(VZCTL, &driver->version) < 0) {
openvzError(conn, VIR_ERR_INTERNAL_ERROR,
"%s", _("Could not extract vzctl version"));
return -1;
}
return 0;
}
virCapsPtr openvzCapsInit(void)
{
struct utsname utsname;
virCapsPtr caps;
virCapsGuestPtr guest;
uname(&utsname);
if ((caps = virCapabilitiesNew(utsname.machine,
0, 0)) == NULL)
goto no_memory;
if (nodeCapsInitNUMA(caps) < 0)
goto no_memory;
virCapabilitiesSetMacPrefix(caps, (unsigned char[]){ 0x52, 0x54, 0x00 });
if ((guest = virCapabilitiesAddGuest(caps,
"exe",
utsname.machine,
sizeof(int) == 4 ? 32 : 8,
NULL,
NULL,
0,
NULL)) == NULL)
goto no_memory;
if (virCapabilitiesAddGuestDomain(guest,
"openvz",
NULL,
NULL,
0,
NULL) == NULL)
goto no_memory;
return caps;
no_memory:
virCapabilitiesFree(caps);
return NULL;
}
static int
openvzReadNetworkConf(virConnectPtr conn,
virDomainDefPtr def,
int veid) {
int ret;
virDomainNetDefPtr net = NULL;
char temp[4096];
char *token, *saveptr = NULL;
/*parse routing network configuration*
* Sample from config:
* IP_ADDRESS="1.1.1.1 1.1.1.2"
* splited IPs by space
*/
ret = openvzReadVPSConfigParam(veid, "IP_ADDRESS", temp, sizeof(temp));
if (ret < 0) {
openvzError(conn, VIR_ERR_INTERNAL_ERROR,
_("Could not read 'IP_ADDRESS' from config for container %d"),
veid);
goto error;
} else if (ret > 0) {
token = strtok_r(temp, " ", &saveptr);
while (token != NULL) {
if (VIR_ALLOC(net) < 0)
goto no_memory;
net->type = VIR_DOMAIN_NET_TYPE_ETHERNET;
net->data.ethernet.ipaddr = strdup(token);
if (net->data.ethernet.ipaddr == NULL)
goto no_memory;
if (VIR_REALLOC_N(def->nets, def->nnets + 1) < 0)
goto no_memory;
def->nets[def->nnets++] = net;
net = NULL;
token = strtok_r(NULL, " ", &saveptr);
}
}
/*parse bridge devices*/
/*Sample from config:
*NETIF="ifname=eth10,mac=00:18:51:C1:05:EE,host_ifname=veth105.10,host_mac=00:18:51:8F:D9:F3"
*devices splited by ';'
*/
ret = openvzReadVPSConfigParam(veid, "NETIF", temp, sizeof(temp));
if (ret < 0) {
openvzError(conn, VIR_ERR_INTERNAL_ERROR,
_("Could not read 'NETIF' from config for container %d"),
veid);
goto error;
} else if (ret > 0) {
token = strtok_r(temp, ";", &saveptr);
while (token != NULL) {
/*add new device to list*/
if (VIR_ALLOC(net) < 0)
goto no_memory;
net->type = VIR_DOMAIN_NET_TYPE_BRIDGE;
char *p = token;
char cpy_temp[32];
int len;
/*parse string*/
do {
char *next = strchrnul (token, ',');
if (STRPREFIX(p, "ifname=")) {
/* skip in libvirt */
} else if (STRPREFIX(p, "host_ifname=")) {
p += 12;
len = next - p;
if (len > 16) {
openvzError(conn, VIR_ERR_INTERNAL_ERROR,
"%s", _("Too long network device name"));
goto error;
}
if (VIR_ALLOC_N(net->ifname, len+1) < 0)
goto no_memory;
if (virStrncpy(net->ifname, p, len, len+1) == NULL) {
openvzError(conn, VIR_ERR_INTERNAL_ERROR,
_("Network ifname %s too long for destination"), p);
goto error;
}
} else if (STRPREFIX(p, "bridge=")) {
p += 7;
len = next - p;
if (len > 16) {
openvzError(conn, VIR_ERR_INTERNAL_ERROR,
"%s", _("Too long bridge device name"));
goto error;
}
if (VIR_ALLOC_N(net->data.bridge.brname, len+1) < 0)
goto no_memory;
if (virStrncpy(net->data.bridge.brname, p, len, len+1) == NULL) {
openvzError(conn, VIR_ERR_INTERNAL_ERROR,
_("Bridge name %s too long for destination"), p);
goto error;
}
} else if (STRPREFIX(p, "mac=")) {
p += 4;
len = next - p;
if (len != 17) { //should be 17
openvzError(conn, VIR_ERR_INTERNAL_ERROR,
"%s", _("Wrong length MAC address"));
goto error;
}
if (virStrncpy(cpy_temp, p, len, sizeof(cpy_temp)) == NULL) {
openvzError(conn, VIR_ERR_INTERNAL_ERROR,
_("MAC address %s too long for destination"), p);
goto error;
}
if (virParseMacAddr(cpy_temp, net->mac) < 0) {
openvzError(conn, VIR_ERR_INTERNAL_ERROR,
"%s", _("Wrong MAC address"));
goto error;
}
}
p = ++next;
} while (p < token + strlen(token));
if (VIR_REALLOC_N(def->nets, def->nnets + 1) < 0)
goto no_memory;
def->nets[def->nnets++] = net;
net = NULL;
token = strtok_r(NULL, ";", &saveptr);
}
}
return 0;
no_memory:
virReportOOMError(conn);
error:
virDomainNetDefFree(net);
return -1;
}
/* utility function to replace 'from' by 'to' in 'str' */
static char*
openvz_replace(const char* str,
const char* from,
const char* to) {
const char* offset = NULL;
const char* str_start = str;
int to_len = strlen(to);
int from_len = strlen(from);
virBuffer buf = VIR_BUFFER_INITIALIZER;
if(!from)
return NULL;
while((offset = strstr(str_start, from)))
{
virBufferAdd(&buf, str_start, offset-str_start);
virBufferAdd(&buf, to, to_len);
str_start = offset + from_len;
}
virBufferAdd(&buf, str_start, strlen(str_start));
if(virBufferError(&buf))
return NULL;
return virBufferContentAndReset(&buf);
}
static int
openvzReadFSConf(virConnectPtr conn,
virDomainDefPtr def,
int veid) {
int ret;
virDomainFSDefPtr fs = NULL;
char* veid_str = NULL;
char temp[100];
ret = openvzReadVPSConfigParam(veid, "OSTEMPLATE", temp, sizeof(temp));
if (ret < 0) {
openvzError(conn, VIR_ERR_INTERNAL_ERROR,
_("Could not read 'OSTEMPLATE' from config for container %d"),
veid);
goto error;
} else if (ret > 0) {
if (VIR_ALLOC(fs) < 0)
goto no_memory;
fs->type = VIR_DOMAIN_FS_TYPE_TEMPLATE;
fs->src = strdup(temp);
} else {
/* OSTEMPLATE was not found, VE was booted from a private dir directly */
ret = openvzReadVPSConfigParam(veid, "VE_PRIVATE", temp, sizeof(temp));
if (ret <= 0) {
openvzError(conn, VIR_ERR_INTERNAL_ERROR,
_("Could not read 'VE_PRIVATE' from config for container %d"),
veid);
goto error;
}
if (VIR_ALLOC(fs) < 0)
goto no_memory;
if(virAsprintf(&veid_str, "%d", veid) < 0)
goto error;
fs->type = VIR_DOMAIN_FS_TYPE_MOUNT;
fs->src = openvz_replace(temp, "$VEID", veid_str);
VIR_FREE(veid_str);
}
fs->dst = strdup("/");
if (fs->src == NULL || fs->dst == NULL)
goto no_memory;
if (VIR_REALLOC_N(def->fss, def->nfss + 1) < 0)
goto no_memory;
def->fss[def->nfss++] = fs;
fs = NULL;
return 0;
no_memory:
virReportOOMError(conn);
error:
virDomainFSDefFree(fs);
return -1;
}
/* Free all memory associated with a openvz_driver structure */
void
openvzFreeDriver(struct openvz_driver *driver)
{
if (!driver)
return;
virDomainObjListDeinit(&driver->domains);
virCapabilitiesFree(driver->caps);
}
int openvzLoadDomains(struct openvz_driver *driver) {
FILE *fp;
int veid, ret;
char status[16];
char uuidstr[VIR_UUID_STRING_BUFLEN];
virDomainObjPtr dom = NULL;
char temp[50];
if (openvzAssignUUIDs() < 0)
return -1;
if ((fp = popen(VZLIST " -a -ovpsid,status -H 2>/dev/null", "r")) == NULL) {
openvzError(NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("popen failed"));
return -1;
}
while(!feof(fp)) {
if (fscanf(fp, "%d %s\n", &veid, status) != 2) {
if (feof(fp))
break;
openvzError(NULL, VIR_ERR_INTERNAL_ERROR,
"%s", _("Failed to parse vzlist output"));
goto cleanup;
}
if (VIR_ALLOC(dom) < 0)
goto no_memory;
if (virMutexInit(&dom->lock) < 0) {
openvzError(NULL, VIR_ERR_INTERNAL_ERROR,
"%s", _("cannot initialize mutex"));
VIR_FREE(dom);
goto cleanup;
}
if (VIR_ALLOC(dom->def) < 0)
goto no_memory;
if (STREQ(status, "stopped"))
dom->state = VIR_DOMAIN_SHUTOFF;
else
dom->state = VIR_DOMAIN_RUNNING;
dom->pid = veid;
dom->def->id = dom->state == VIR_DOMAIN_SHUTOFF ? -1 : veid;
if (virAsprintf(&dom->def->name, "%i", veid) < 0)
goto no_memory;
openvzGetVPSUUID(veid, uuidstr, sizeof(uuidstr));
ret = virUUIDParse(uuidstr, dom->def->uuid);
if (ret == -1) {
openvzError(NULL, VIR_ERR_INTERNAL_ERROR,
"%s", _("UUID in config file malformed"));
goto cleanup;
}
if (!(dom->def->os.type = strdup("exe")))
goto no_memory;
if (!(dom->def->os.init = strdup("/sbin/init")))
goto no_memory;
ret = openvzReadVPSConfigParam(veid, "CPUS", temp, sizeof(temp));
if (ret < 0) {
openvzError(NULL, VIR_ERR_INTERNAL_ERROR,
_("Could not read config for container %d"),
veid);
goto cleanup;
} else if (ret > 0) {
dom->def->vcpus = strtoI(temp);
}
if (ret == 0 || dom->def->vcpus == 0)
dom->def->vcpus = openvzGetNodeCPUs();
/* XXX load rest of VM config data .... */
openvzReadNetworkConf(NULL, dom->def, veid);
openvzReadFSConf(NULL, dom->def, veid);
virUUIDFormat(dom->def->uuid, uuidstr);
if (virHashAddEntry(driver->domains.objs, uuidstr, dom) < 0)
goto no_memory;
dom = NULL;
}
fclose(fp);
return 0;
no_memory:
virReportOOMError(NULL);
cleanup:
fclose(fp);
virDomainObjFree(dom);
return -1;
}
unsigned int
openvzGetNodeCPUs(void)
{
virNodeInfo nodeinfo;
if (nodeGetInfo(NULL, &nodeinfo) < 0)
return 0;
return nodeinfo.cpus;
}
static int
openvzWriteConfigParam(const char * conf_file, const char *param, const char *value)
{
char * temp_file = NULL;
int fd = -1, temp_fd = -1;
char line[PATH_MAX] ;
if (virAsprintf(&temp_file, "%s.tmp", conf_file)<0)
return -1;
fd = open(conf_file, O_RDONLY);
if (fd == -1)
goto error;
temp_fd = open(temp_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
if (temp_fd == -1) {
close(fd);
goto error;
}
while(1) {
if (openvz_readline(fd, line, sizeof(line)) <= 0)
break;
if (!(STRPREFIX(line, param) && line[strlen(param)] == '=')) {
if (safewrite(temp_fd, line, strlen(line)) !=
strlen(line))
goto error;
}
}
if (safewrite(temp_fd, param, strlen(param)) < 0 ||
safewrite(temp_fd, "=\"", 2) < 0 ||
safewrite(temp_fd, value, strlen(value)) < 0 ||
safewrite(temp_fd, "\"\n", 2) < 0)
goto error;
if (close(fd) < 0)
goto error;
fd = -1;
if (close(temp_fd) < 0)
goto error;
temp_fd = -1;
if (rename(temp_file, conf_file) < 0)
goto error;
return 0;
error:
if (fd != -1)
close(fd);
if (temp_fd != -1)
close(temp_fd);
if(temp_file)
unlink(temp_file);
VIR_FREE(temp_file);
return -1;
}
int
openvzWriteVPSConfigParam(int vpsid, const char *param, const char *value)
{
char conf_file[PATH_MAX];
if (openvzLocateConfFile(vpsid, conf_file, PATH_MAX, "conf")<0)
return -1;
return openvzWriteConfigParam(conf_file, param, value);
}
static int
openvzReadConfigParam(const char * conf_file ,const char * param, char *value, int maxlen)
{
char line[PATH_MAX] ;
int ret, found = 0;
int fd ;
char * sf, * token;
char *saveptr = NULL;
value[0] = 0;
fd = open(conf_file, O_RDONLY);
if (fd == -1)
return -1;
while(1) {
ret = openvz_readline(fd, line, sizeof(line));
if(ret <= 0)
break;
saveptr = NULL;
if (STREQLEN(line, param, strlen(param))) {
sf = line;
sf += strlen(param);
if (sf[0] == '=' && sf[1] != '\0' ) {
sf ++;
if ((token = strtok_r(sf,"\"\t\n", &saveptr)) != NULL) {
if (virStrcpy(value, token, maxlen) == NULL) {
ret = -1;
break;
}
found = 1;
}
}
}
}
close(fd);
if (ret == 0 && found)
ret = 1;
return ret ;
}
/*
* Read parameter from container config
* sample: 133, "OSTEMPLATE", value, 1024
* return: -1 - error
* 0 - don't found
* 1 - OK
*/
int
openvzReadVPSConfigParam(int vpsid ,const char * param, char *value, int maxlen)
{
char conf_file[PATH_MAX] ;
if (openvzLocateConfFile(vpsid, conf_file, PATH_MAX, "conf")<0)
return -1;
return openvzReadConfigParam(conf_file, param, value, maxlen);
}
static int
openvz_copyfile(char* from_path, char* to_path)
{
char line[PATH_MAX];
int fd, copy_fd;
int bytes_read;
fd = open(from_path, O_RDONLY);
if (fd == -1)
return -1;
copy_fd = open(to_path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
if (copy_fd == -1) {
close(fd);
return -1;
}
while(1) {
if (openvz_readline(fd, line, sizeof(line)) <= 0)
break;
bytes_read = strlen(line);
if (safewrite(copy_fd, line, bytes_read) != bytes_read)
goto error;
}
if (close(fd) < 0)
goto error;
fd = -1;
if (close(copy_fd) < 0)
goto error;
return 0;
error:
if (fd != -1)
close(fd);
if (copy_fd != -1)
close(copy_fd);
return -1;
}
/*
* Copy the default config to the VE conf file
* return: -1 - error
* 0 - OK
*/
int
openvzCopyDefaultConfig(int vpsid)
{
char * confdir = NULL;
char * default_conf_file = NULL;
char configfile_value[PATH_MAX];
char conf_file[PATH_MAX];
int ret = -1;
if(openvzReadConfigParam(VZ_CONF_FILE, "CONFIGFILE", configfile_value, PATH_MAX) < 0)
goto cleanup;
confdir = openvzLocateConfDir();
if (confdir == NULL)
goto cleanup;
if (virAsprintf(&default_conf_file, "%s/ve-%s.conf-sample", confdir, configfile_value) < 0)
goto cleanup;
if (openvzLocateConfFile(vpsid, conf_file, PATH_MAX, "conf")<0)
goto cleanup;
if (openvz_copyfile(default_conf_file, conf_file)<0)
goto cleanup;
ret = 0;
cleanup:
VIR_FREE(confdir);
VIR_FREE(default_conf_file);
return ret;
}
/* Locate config file of container
* return -1 - error
* 0 - OK
*/
static int
openvzLocateConfFile(int vpsid, char *conffile, int maxlen, const char *ext)
{
char * confdir;
int ret = 0;
confdir = openvzLocateConfDir();
if (confdir == NULL)
return -1;
if (snprintf(conffile, maxlen, "%s/%d.%s",
confdir, vpsid, ext ? ext : "conf") >= maxlen)
ret = -1;
VIR_FREE(confdir);
return ret;
}
static char
*openvzLocateConfDir(void)
{
const char *conf_dir_list[] = {"/etc/vz/conf", "/usr/local/etc/conf", NULL};
int i=0;
while(conf_dir_list[i]) {
if(!access(conf_dir_list[i], F_OK))
return strdup(conf_dir_list[i]);
i ++;
}
return NULL;
}
/* Richard Steven's classic readline() function */
int
openvz_readline(int fd, char *ptr, int maxlen)
{
int n, rc;
char c;
for(n = 1; n < maxlen; n ++) {
if( (rc = read(fd, &c, 1)) == 1) {
*ptr++ = c;
if(c == '\n')
break;
}
else if(rc == 0) {
if(n == 1)
return 0; /* EOF condition */
else
break;
}
else
return -1; /* error */
}
*ptr = 0;
return n;
}
static int
openvzGetVPSUUID(int vpsid, char *uuidstr, size_t len)
{
char conf_file[PATH_MAX];
char line[1024];
char uuidbuf[1024];
char iden[1024];
int fd, ret;
int retval = 0;
if (openvzLocateConfFile(vpsid, conf_file, PATH_MAX, "conf")<0)
return -1;
fd = open(conf_file, O_RDONLY);
if(fd == -1)
return -1;
while(1) {
ret = openvz_readline(fd, line, sizeof(line));
if(ret == -1) {
close(fd);
return -1;
}
if(ret == 0) { /* EoF, UUID was not found */
uuidstr[0] = 0;
break;
}
sscanf(line, "%s %s\n", iden, uuidbuf);
if(STREQ(iden, "#UUID:")) {
if (virStrcpy(uuidstr, uuidbuf, len) == NULL)
retval = -1;
break;
}
}
close(fd);
return retval;
}
/* Do actual checking for UUID presence in conf file,
* assign if not present.
*/
int
openvzSetDefinedUUID(int vpsid, unsigned char *uuid)
{
char conf_file[PATH_MAX];
char uuidstr[VIR_UUID_STRING_BUFLEN];
if (uuid == NULL)
return -1;
if (openvzLocateConfFile(vpsid, conf_file, PATH_MAX, "conf")<0)
return -1;
if (openvzGetVPSUUID(vpsid, uuidstr, sizeof(uuidstr)))
return -1;
if (uuidstr[0] == 0) {
FILE *fp = fopen(conf_file, "a"); /* append */
if (fp == NULL)
return -1;
virUUIDFormat(uuid, uuidstr);
/* Record failure if fprintf or fclose fails,
and be careful always to close the stream. */
if ((fprintf(fp, "\n#UUID: %s\n", uuidstr) < 0)
+ (fclose(fp) == EOF))
return -1;
}
return 0;
}
static int
openvzSetUUID(int vpsid){
unsigned char uuid[VIR_UUID_BUFLEN];
virUUIDGenerate(uuid);
return openvzSetDefinedUUID(vpsid, uuid);
}
/*
* Scan VPS config files and see if they have a UUID.
* If not, assign one. Just append one to the config
* file as comment so that the OpenVZ tools ignore it.
*
*/
static int openvzAssignUUIDs(void)
{
DIR *dp;
struct dirent *dent;
char *conf_dir;
int vpsid, res;
char ext[8];
conf_dir = openvzLocateConfDir();
if (conf_dir == NULL)
return -1;
dp = opendir(conf_dir);
if(dp == NULL) {
VIR_FREE(conf_dir);
return 0;
}
while((dent = readdir(dp))) {
res = sscanf(dent->d_name, "%d.%5s", &vpsid, ext);
if(!(res == 2 && STREQ(ext, "conf")))
continue;
if(vpsid > 0) /* '0.conf' belongs to the host, ignore it */
openvzSetUUID(vpsid);
}
closedir(dp);
VIR_FREE(conf_dir);
return 0;
}
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