libvirt/src/openvz/openvz_conf.c

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/*
* openvz_conf.c: config functions for managing OpenVZ VEs
*
* Copyright (C) 2010-2012 Red Hat, Inc.
* 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, see
* <http://www.gnu.org/licenses/>.
*
* 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 <time.h>
#include <sys/stat.h>
#include <unistd.h>
#include <limits.h>
#include <errno.h>
2008-06-12 13:48:29 +00:00
#include <string.h>
#include <sys/wait.h>
#include "virterror_internal.h"
#include "openvz_conf.h"
#include "openvz_util.h"
#include "uuid.h"
#include "buf.h"
#include "memory.h"
#include "util.h"
#include "nodeinfo.h"
#include "virfile.h"
#include "command.h"
#define VIR_FROM_THIS VIR_FROM_OPENVZ
static char *openvzLocateConfDir(void);
static int openvzGetVPSUUID(int vpsid, char *uuidstr, size_t len);
static int openvzAssignUUIDs(void);
static int openvzLocateConfFileDefault(int vpsid, char **conffile, const char *ext);
openvzLocateConfFileFunc openvzLocateConfFile = openvzLocateConfFileDefault;
int
strtoI(const char *str)
{
int val;
if (virStrToLong_i(str, NULL, 10, &val) < 0)
return 0;
return val;
}
static int
openvzExtractVersionInfo(const char *cmdstr, int *retversion)
{
int ret = -1;
unsigned long version;
char *help = NULL;
char *tmp;
virCommandPtr cmd = virCommandNewArgList(cmdstr, "--help", NULL);
if (retversion)
*retversion = 0;
virCommandAddEnvString(cmd, "LC_ALL=C");
virCommandSetOutputBuffer(cmd, &help);
if (virCommandRun(cmd, NULL) < 0)
goto cleanup;
tmp = help;
/* expected format: vzctl version <major>.<minor>.<micro> */
if ((tmp = STRSKIP(tmp, "vzctl version ")) == NULL)
goto cleanup;
if (virParseVersionString(tmp, &version, true) < 0)
goto cleanup;
if (retversion)
*retversion = version;
ret = 0;
cleanup:
virCommandFree(cmd);
VIR_FREE(help);
return ret;
}
int openvzExtractVersion(struct openvz_driver *driver)
{
if (driver->version > 0)
return 0;
if (openvzExtractVersionInfo(VZCTL, &driver->version) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Could not extract vzctl version"));
return -1;
}
return 0;
}
/* Parse config values of the form barrier:limit into barrier and limit */
static int
openvzParseBarrierLimit(const char* value,
unsigned long long *barrier,
unsigned long long *limit)
{
char *token;
char *saveptr = NULL;
char *str = strdup(value);
if (str == NULL) {
virReportOOMError();
goto error;
}
token = strtok_r(str, ":", &saveptr);
if (token == NULL) {
goto error;
} else {
if (barrier != NULL) {
if (virStrToLong_ull(token, NULL, 10, barrier))
goto error;
}
}
token = strtok_r(NULL, ":", &saveptr);
if (token == NULL) {
goto error;
} else {
if (limit != NULL) {
if (virStrToLong_ull(token, NULL, 10, limit))
goto error;
}
}
return 0;
error:
VIR_FREE(str);
return -1;
}
static int openvzDefaultConsoleType(const char *ostype ATTRIBUTE_UNUSED,
virArch arch ATTRIBUTE_UNUSED)
{
return VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_OPENVZ;
}
virCapsPtr openvzCapsInit(void)
{
virCapsPtr caps;
virCapsGuestPtr guest;
if ((caps = virCapabilitiesNew(virArchFromHost(),
0, 0)) == NULL)
goto no_memory;
2009-06-03 13:28:02 +00:00
if (nodeCapsInitNUMA(caps) < 0)
goto no_memory;
virCapabilitiesSetMacPrefix(caps, (unsigned char[]){ 0x52, 0x54, 0x00 });
if ((guest = virCapabilitiesAddGuest(caps,
"exe",
caps->host.arch,
NULL,
NULL,
0,
NULL)) == NULL)
goto no_memory;
if (virCapabilitiesAddGuestDomain(guest,
"openvz",
NULL,
NULL,
0,
NULL) == NULL)
goto no_memory;
caps->defaultInitPath = "/sbin/init";
caps->defaultConsoleTargetType = openvzDefaultConsoleType;
return caps;
no_memory:
virCapabilitiesFree(caps);
return NULL;
}
int
openvzReadNetworkConf(virDomainDefPtr def,
int veid) {
int ret;
virDomainNetDefPtr net = NULL;
char *temp = NULL;
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);
if (ret < 0) {
virReportError(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);
if (ret < 0) {
virReportError(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(p, ',');
if (STRPREFIX(p, "ifname=")) {
/* skip in libvirt */
} else if (STRPREFIX(p, "host_ifname=")) {
p += 12;
len = next - p;
if (len > 16) {
virReportError(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) {
virReportError(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) {
virReportError(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) {
virReportError(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 */
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Wrong length MAC address"));
goto error;
}
if (virStrncpy(cpy_temp, p, len, sizeof(cpy_temp)) == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("MAC address %s too long for destination"), p);
goto error;
}
if (virMacAddrParse(cpy_temp, &net->mac) < 0) {
virReportError(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);
}
}
VIR_FREE(temp);
return 0;
no_memory:
virReportOOMError();
error:
VIR_FREE(temp);
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;
int from_len;
virBuffer buf = VIR_BUFFER_INITIALIZER;
if ((!from) || (!to))
return NULL;
from_len = strlen(from);
to_len = strlen(to);
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, -1);
if (virBufferError(&buf)) {
virBufferFreeAndReset(&buf);
return NULL;
}
return virBufferContentAndReset(&buf);
}
static int
openvzReadFSConf(virDomainDefPtr def,
int veid) {
int ret;
virDomainFSDefPtr fs = NULL;
char *veid_str = NULL;
char *temp = NULL;
const char *param;
unsigned long long barrier, limit;
ret = openvzReadVPSConfigParam(veid, "OSTEMPLATE", &temp);
if (ret < 0) {
virReportError(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);
if (ret <= 0) {
virReportError(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 no_memory;
fs->type = VIR_DOMAIN_FS_TYPE_MOUNT;
fs->src = openvz_replace(temp, "$VEID", veid_str);
VIR_FREE(veid_str);
}
fs->dst = strdup("/");
param = "DISKSPACE";
ret = openvzReadVPSConfigParam(veid, param, &temp);
if (ret > 0) {
if (openvzParseBarrierLimit(temp, &barrier, &limit)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Could not read '%s' from config for container %d"),
param, veid);
goto error;
} else {
/* Ensure that we can multiply by 1024 without overflowing. */
if (barrier > ULLONG_MAX / 1024 ||
limit > ULLONG_MAX / 1024) {
virReportSystemError(VIR_ERR_OVERFLOW, "%s",
_("Unable to parse quota"));
goto error;
}
fs->space_soft_limit = barrier * 1024; /* unit is bytes */
fs->space_hard_limit = limit * 1024; /* unit is bytes */
}
}
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;
VIR_FREE(temp);
return 0;
no_memory:
virReportOOMError();
error:
VIR_FREE(temp);
virDomainFSDefFree(fs);
return -1;
}
static int
openvzReadMemConf(virDomainDefPtr def, int veid)
{
int ret;
char *temp = NULL;
unsigned long long barrier, limit;
const char *param;
long kb_per_pages;
kb_per_pages = openvzKBPerPages();
if (kb_per_pages < 0)
goto error;
/* Memory allocation guarantee */
param = "VMGUARPAGES";
ret = openvzReadVPSConfigParam(veid, param, &temp);
if (ret < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Could not read '%s' from config for container %d"),
param, veid);
goto error;
} else if (ret > 0) {
ret = openvzParseBarrierLimit(temp, &barrier, NULL);
if (ret < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Could not parse barrier of '%s' "
"from config for container %d"), param, veid);
goto error;
}
if (barrier == LONG_MAX)
def->mem.min_guarantee = 0ull;
else
def->mem.min_guarantee = barrier * kb_per_pages;
}
/* Memory hard and soft limits */
param = "PRIVVMPAGES";
ret = openvzReadVPSConfigParam(veid, param, &temp);
if (ret < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Could not read '%s' from config for container %d"),
param, veid);
goto error;
} else if (ret > 0) {
ret = openvzParseBarrierLimit(temp, &barrier, &limit);
if (ret < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Could not parse barrier and limit of '%s' "
"from config for container %d"), param, veid);
goto error;
}
if (barrier == LONG_MAX)
def->mem.soft_limit = 0ull;
else
def->mem.soft_limit = barrier * kb_per_pages;
if (limit == LONG_MAX)
def->mem.hard_limit = 0ull;
else
def->mem.hard_limit = limit * kb_per_pages;
}
ret = 0;
error:
VIR_FREE(temp);
return ret;
}
/* Free all memory associated with a openvz_driver structure */
void
openvzFreeDriver(struct openvz_driver *driver)
{
if (!driver)
return;
2008-09-05 15:00:14 +00:00
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
2009-10-09 11:33:51 +00:00
virDomainObjListDeinit(&driver->domains);
virCapabilitiesFree(driver->caps);
VIR_FREE(driver);
2008-09-05 15:00:14 +00:00
}
int openvzLoadDomains(struct openvz_driver *driver) {
int veid, ret;
char *status;
char uuidstr[VIR_UUID_STRING_BUFLEN];
virDomainObjPtr dom = NULL;
char *temp = NULL;
char *outbuf = NULL;
char *line;
virCommandPtr cmd = NULL;
if (openvzAssignUUIDs() < 0)
return -1;
cmd = virCommandNewArgList(VZLIST, "-a", "-ovpsid,status", "-H", NULL);
virCommandSetOutputBuffer(cmd, &outbuf);
if (virCommandRun(cmd, NULL) < 0)
goto cleanup;
2008-09-05 15:00:14 +00:00
line = outbuf;
while (line[0] != '\0') {
if (virStrToLong_i(line, &status, 10, &veid) < 0 ||
*status++ != ' ' ||
(line = strchr(status, '\n')) == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Failed to parse vzlist output"));
goto cleanup;
}
*line++ = '\0';
2008-09-05 15:00:14 +00:00
if (!(dom = virDomainObjNew(driver->caps)))
goto cleanup;
2009-01-15 19:56:05 +00:00
if (VIR_ALLOC(dom->def) < 0)
goto no_memory;
dom->def->virtType = VIR_DOMAIN_VIRT_OPENVZ;
if (STREQ(status, "stopped")) {
virDomainObjSetState(dom, VIR_DOMAIN_SHUTOFF,
VIR_DOMAIN_SHUTOFF_UNKNOWN);
} else {
virDomainObjSetState(dom, VIR_DOMAIN_RUNNING,
VIR_DOMAIN_RUNNING_UNKNOWN);
}
2008-09-05 15:00:14 +00:00
dom->pid = veid;
if (virDomainObjGetState(dom, NULL) == VIR_DOMAIN_SHUTOFF)
dom->def->id = -1;
else
dom->def->id = veid;
/* XXX OpenVZ doesn't appear to have concept of a transient domain */
dom->persistent = 1;
2008-09-05 15:00:14 +00:00
2008-12-23 13:03:29 +00:00
if (virAsprintf(&dom->def->name, "%i", veid) < 0)
goto no_memory;
2008-09-05 15:00:14 +00:00
openvzGetVPSUUID(veid, uuidstr, sizeof(uuidstr));
ret = virUUIDParse(uuidstr, dom->def->uuid);
2008-09-05 15:00:14 +00:00
if (ret == -1) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("UUID in config file malformed"));
goto cleanup;
}
2008-09-05 15:00:14 +00:00
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);
if (ret < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Could not read config for container %d"),
veid);
goto cleanup;
} else if (ret > 0) {
2010-09-29 16:20:07 +00:00
dom->def->maxvcpus = strtoI(temp);
}
2010-09-29 16:20:07 +00:00
if (ret == 0 || dom->def->maxvcpus == 0)
dom->def->maxvcpus = openvzGetNodeCPUs();
dom->def->vcpus = dom->def->maxvcpus;
/* XXX load rest of VM config data .... */
2008-09-05 15:00:14 +00:00
openvzReadNetworkConf(dom->def, veid);
openvzReadFSConf(dom->def, veid);
openvzReadMemConf(dom->def, veid);
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
2009-10-09 11:33:51 +00:00
virUUIDFormat(dom->def->uuid, uuidstr);
if (virHashLookup(driver->domains.objs, uuidstr)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Duplicate container UUID %s detected for %d"),
uuidstr,
veid);
goto cleanup;
}
if (virHashAddEntry(driver->domains.objs, uuidstr, dom) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Could not add UUID for container %d"), veid);
goto cleanup;
}
virDomainObjUnlock(dom);
dom = NULL;
}
2008-09-05 15:00:14 +00:00
virCommandFree(cmd);
VIR_FREE(temp);
VIR_FREE(outbuf);
2008-09-05 15:00:14 +00:00
return 0;
2008-09-05 15:00:14 +00:00
no_memory:
virReportOOMError();
2008-09-05 15:00:14 +00:00
cleanup:
virCommandFree(cmd);
VIR_FREE(temp);
VIR_FREE(outbuf);
virObjectUnref(dom);
return -1;
}
unsigned int
openvzGetNodeCPUs(void)
{
virNodeInfo nodeinfo;
2009-06-03 13:28:02 +00:00
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 temp_fd = -1;
FILE *fp;
char *line = NULL;
size_t line_size = 0;
if (virAsprintf(&temp_file, "%s.tmp", conf_file)<0) {
virReportOOMError();
return -1;
}
fp = fopen(conf_file, "r");
if (fp == NULL)
goto error;
temp_fd = open(temp_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
if (temp_fd == -1) {
goto error;
}
while (1) {
if (getline(&line, &line_size, fp) <= 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 (VIR_FCLOSE(fp) < 0)
goto error;
if (VIR_CLOSE(temp_fd) < 0)
goto error;
if (rename(temp_file, conf_file) < 0)
goto error;
VIR_FREE(line);
return 0;
error:
VIR_FREE(line);
VIR_FORCE_FCLOSE(fp);
VIR_FORCE_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;
int ret;
if (openvzLocateConfFile(vpsid, &conf_file, "conf") < 0)
return -1;
ret = openvzWriteConfigParam(conf_file, param, value);
VIR_FREE(conf_file);
return ret;
}
/*
* value will be freed before a new value is assigned to it, the caller is
* responsible for freeing it afterwards.
*
* Returns <0 on error, 0 if not found, 1 if found.
*/
int
openvzReadConfigParam(const char *conf_file, const char *param, char **value)
{
char *line = NULL;
size_t line_size = 0;
FILE *fp;
int err = 0;
char *sf, *token, *saveptr = NULL;
fp = fopen(conf_file, "r");
if (fp == NULL)
return -1;
VIR_FREE(*value);
while (1) {
if (getline(&line, &line_size, fp) < 0) {
err = !feof(fp);
break;
}
if (! STREQLEN(line, param, strlen(param)))
continue;
sf = line + strlen(param);
if (*sf++ != '=') continue;
saveptr = NULL;
if ((token = strtok_r(sf, "\"\t\n", &saveptr)) != NULL) {
VIR_FREE(*value);
*value = strdup(token);
if (*value == NULL) {
err = 1;
break;
}
/* keep going - last entry wins */
}
}
VIR_FREE(line);
VIR_FORCE_FCLOSE(fp);
return err ? -1 : *value ? 1 : 0;
}
/*
* Read parameter from container config
*
* value will be freed before a new value is assined to it, the caller is
* responsible for freeing it afterwards.
*
* sample: 133, "OSTEMPLATE", &value
* return: -1 - error
* 0 - don't found
* 1 - OK
*/
int
openvzReadVPSConfigParam(int vpsid, const char *param, char **value)
{
char *conf_file;
int ret;
if (openvzLocateConfFile(vpsid, &conf_file, "conf") < 0)
return -1;
ret = openvzReadConfigParam(conf_file, param, value);
VIR_FREE(conf_file);
return ret;
}
static int
openvz_copyfile(char* from_path, char* to_path)
{
char *line = NULL;
size_t line_size = 0;
FILE *fp;
int copy_fd;
int bytes_read;
fp = fopen(from_path, "r");
if (fp == NULL)
return -1;
copy_fd = open(to_path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
if (copy_fd == -1) {
VIR_FORCE_FCLOSE(fp);
return -1;
}
while (1) {
if (getline(&line, &line_size, fp) <= 0)
break;
bytes_read = strlen(line);
if (safewrite(copy_fd, line, bytes_read) != bytes_read)
goto error;
}
if (VIR_FCLOSE(fp) < 0)
goto error;
if (VIR_CLOSE(copy_fd) < 0)
goto error;
VIR_FREE(line);
return 0;
error:
VIR_FREE(line);
VIR_FORCE_FCLOSE(fp);
VIR_FORCE_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 = NULL;
char *conf_file = NULL;
int ret = -1;
if (openvzReadConfigParam(VZ_CONF_FILE, "CONFIGFILE", &configfile_value) < 0)
goto cleanup;
confdir = openvzLocateConfDir();
if (confdir == NULL)
goto cleanup;
if (virAsprintf(&default_conf_file, "%s/ve-%s.conf-sample", confdir,
configfile_value) < 0) {
virReportOOMError();
goto cleanup;
}
if (openvzLocateConfFile(vpsid, &conf_file, "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);
VIR_FREE(configfile_value);
VIR_FREE(conf_file);
return ret;
}
/* Locate config file of container
* return -1 - error
* 0 - OK */
static int
openvzLocateConfFileDefault(int vpsid, char **conffile, const char *ext)
{
char *confdir;
int ret = 0;
confdir = openvzLocateConfDir();
if (confdir == NULL)
return -1;
if (virAsprintf(conffile, "%s/%d.%s", confdir, vpsid,
ext ? ext : "conf") < 0) {
virReportOOMError();
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;
char *line = NULL;
size_t line_size = 0;
char *saveptr = NULL;
char *uuidbuf;
char *iden;
FILE *fp;
int retval = -1;
if (openvzLocateConfFile(vpsid, &conf_file, "conf") < 0)
return -1;
fp = fopen(conf_file, "r");
if (fp == NULL)
goto cleanup;
while (1) {
if (getline(&line, &line_size, fp) < 0) {
if (feof(fp)) { /* EOF, UUID was not found */
uuidstr[0] = 0;
break;
} else {
goto cleanup;
}
}
iden = strtok_r(line, " ", &saveptr);
uuidbuf = strtok_r(NULL, "\n", &saveptr);
if (iden != NULL && uuidbuf != NULL && STREQ(iden, "#UUID:")) {
if (virStrcpy(uuidstr, uuidbuf, len) == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("invalid uuid %s"), uuidbuf);
goto cleanup;
}
break;
}
}
retval = 0;
cleanup:
VIR_FREE(line);
VIR_FORCE_FCLOSE(fp);
VIR_FREE(conf_file);
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;
2007-08-09 20:19:12 +00:00
char uuidstr[VIR_UUID_STRING_BUFLEN];
FILE *fp = NULL;
int ret = -1;
if (uuid == NULL)
return -1;
if (openvzLocateConfFile(vpsid, &conf_file, "conf") < 0)
return -1;
if (openvzGetVPSUUID(vpsid, uuidstr, sizeof(uuidstr)))
goto cleanup;
if (uuidstr[0] == 0) {
fp = fopen(conf_file, "a"); /* append */
if (fp == NULL)
goto cleanup;
2007-08-09 20:19:12 +00:00
virUUIDFormat(uuid, uuidstr);
/* Record failure if fprintf or VIR_FCLOSE fails,
and be careful always to close the stream. */
if ((fprintf(fp, "\n#UUID: %s\n", uuidstr) < 0) ||
(VIR_FCLOSE(fp) == EOF))
goto cleanup;
}
ret = 0;
cleanup:
VIR_FORCE_FCLOSE(fp);
VIR_FREE(conf_file);
return ret;
}
static int
openvzSetUUID(int vpsid){
unsigned char uuid[VIR_UUID_BUFLEN];
if (virUUIDGenerate(uuid)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Failed to generate UUID"));
return -1;
}
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;
char *ext;
int ret = 0;
conf_dir = openvzLocateConfDir();
if (conf_dir == NULL)
return -1;
dp = opendir(conf_dir);
if (dp == NULL) {
VIR_FREE(conf_dir);
return 0;
}
errno = 0;
while ((dent = readdir(dp))) {
if (virStrToLong_i(dent->d_name, &ext, 10, &vpsid) < 0 ||
*ext++ != '.' ||
STRNEQ(ext, "conf"))
continue;
if (vpsid > 0) /* '0.conf' belongs to the host, ignore it */
openvzSetUUID(vpsid);
errno = 0;
}
if (errno) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Failed to scan configuration directory"));
ret = -1;
}
closedir(dp);
VIR_FREE(conf_dir);
return ret;
}
/*
* Return CTID from name
*
*/
int openvzGetVEID(const char *name) {
virCommandPtr cmd;
char *outbuf;
char *temp;
int veid;
bool ok;
cmd = virCommandNewArgList(VZLIST, name, "-ovpsid", "-H", NULL);
virCommandSetOutputBuffer(cmd, &outbuf);
if (virCommandRun(cmd, NULL) < 0) {
virCommandFree(cmd);
VIR_FREE(outbuf);
return -1;
}
virCommandFree(cmd);
ok = virStrToLong_i(outbuf, &temp, 10, &veid) == 0 && *temp == '\n';
VIR_FREE(outbuf);
if (ok && veid >= 0)
return veid;
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Failed to parse vzlist output"));
return -1;
}