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Allow virtual networks to survive daemon restart

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This commit is contained in:
Daniel P. Berrange 2009-01-20 22:36:10 +00:00
parent a964a6dad6
commit 23a090ab92
10 changed files with 390 additions and 136 deletions
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15
ChangeLog
View File

@ -1,3 +1,18 @@
Tue Jan 20 22:25:53 GMT 2009 Daniel P. Berrange <berrange@redhat.com>
Allow virtual networks to survive a daemon restart
* libvirt.spec.in: Add conditional to allow disabling of network
and remove mkdir of state directories now created in Makefile.am
rules
* src/bridge.c, src/bridge.h: Add a brHasBridge() method
* src/libvirt_bridge.syms: Add brHasBridge
* src/libvirt_private.syms: Add virNetworkConfigFile and
virNetworkSaveConfigXML
* src/network_conf.c, src/network_conf.h, src/network_driver.c:
Write out state file containing live XML. Allow dnsmasq to
store a PID file. Put dnsmasq in background. Remove obsolete
dhcp-leasefile option which was a no-op
Tue Jan 20 22:12:53 GMT 2009 Daniel P. Berrange <berrange@redhat.com>
* src/domain_conf.c, src/domain_conf.h: Support ac97 soundcard

31
libvirt.spec.in
View File

@ -11,6 +11,7 @@
%define with_python 0%{!?_without_python:1}
%define with_libvirtd 0%{!?_without_libvirtd:1}
%define with_uml 0%{!?_without_uml:1}
%define with_network 0%{!?_without_network:1}
# Xen is available only on i386 x86_64 ia64
%ifnarch i386 i686 x86_64 ia64
@ -222,6 +223,10 @@ of recent versions of Linux (and other OSes).
%define _with_rhel5_api --with-rhel5-api
%endif
%if ! %{with_network}
%define _without_network --without-network
%endif
%configure %{?_without_xen} \
%{?_without_qemu} \
%{?_without_openvz} \
@ -232,6 +237,7 @@ of recent versions of Linux (and other OSes).
%{?_without_python} \
%{?_without_libvirtd} \
%{?_without_uml} \
%{?_without_network} \
%{?_with_rhel5_api} \
--with-init-script=redhat \
--with-qemud-pid-file=%{_localstatedir}/run/libvirt_qemud.pid \
@ -248,11 +254,6 @@ rm -f $RPM_BUILD_ROOT%{_libdir}/*.la
rm -f $RPM_BUILD_ROOT%{_libdir}/*.a
rm -f $RPM_BUILD_ROOT%{_libdir}/python*/site-packages/*.la
rm -f $RPM_BUILD_ROOT%{_libdir}/python*/site-packages/*.a
install -d -m 0755 $RPM_BUILD_ROOT%{_localstatedir}/run/libvirt/
# Default dir for disk images defined in SELinux policy
install -d -m 0755 $RPM_BUILD_ROOT%{_localstatedir}/lib/libvirt/images/
# Default dir for kernel+initrd images defnied in SELinux policy
install -d -m 0755 $RPM_BUILD_ROOT%{_localstatedir}/lib/libvirt/boot/
%if %{with_qemu}
# We don't want to install /etc/libvirt/qemu/networks in the main %files list
@ -354,10 +355,30 @@ fi
%endif
%dir %{_localstatedir}/run/libvirt/
%dir %{_localstatedir}/lib/libvirt/
%dir %attr(0700, root, root) %{_localstatedir}/lib/libvirt/images/
%dir %attr(0700, root, root) %{_localstatedir}/lib/libvirt/boot/
%if %{with_qemu}
%dir %{_localstatedir}/run/libvirt/qemu/
%dir %attr(0700, root, root) %{_localstatedir}/lib/libvirt/qemu/
%endif
%if %{with_lxc}
%dir %{_localstatedir}/run/libvirt/lxc/
%dir %attr(0700, root, root) %{_localstatedir}/lib/libvirt/lxc/
%endif
%if %{with_uml}
%dir %{_localstatedir}/run/libvirt/uml/
%dir %attr(0700, root, root) %{_localstatedir}/lib/libvirt/uml/
%endif
%if %{with_network}
%dir %{_localstatedir}/run/libvirt/network/
%dir %attr(0700, root, root) %{_localstatedir}/lib/libvirt/network/
%dir %attr(0700, root, root) %{_localstatedir}/lib/libvirt/iptables/filter/
%dir %attr(0700, root, root) %{_localstatedir}/lib/libvirt/iptables/nat/
%endif
%if %{with_qemu}
%{_datadir}/augeas/lenses/libvirtd_qemu.aug
%{_datadir}/augeas/lenses/tests/test_libvirtd_qemu.aug

24
src/Makefile.am
View File

@ -589,9 +589,29 @@ endif
endif
EXTRA_DIST += $(LXC_CONTROLLER_SOURCES)
# Create the /var/cache/libvirt directory when installing.
install-exec-local:
$(MKDIR_P) $(DESTDIR)$(localstatedir)/cache/libvirt
$(MKDIR_P) "$(DESTDIR)$(localstatedir)/cache/libvirt"
$(MKDIR_P) "$(DESTDIR)$(localstatedir)/lib/libvirt/images"
$(MKDIR_P) "$(DESTDIR)$(localstatedir)/lib/libvirt/boot"
if WITH_QEMU
$(MKDIR_P) "$(DESTDIR)$(localstatedir)/lib/libvirt/qemu"
$(MKDIR_P) "$(DESTDIR)$(localstatedir)/run/libvirt/qemu"
endif
if WITH_LXC
$(MKDIR_P) "$(DESTDIR)$(localstatedir)/lib/libvirt/lxc"
$(MKDIR_P) "$(DESTDIR)$(localstatedir)/run/libvirt/lxc"
endif
if WITH_UML
$(MKDIR_P) "$(DESTDIR)$(localstatedir)/lib/libvirt/uml"
$(MKDIR_P) "$(DESTDIR)$(localstatedir)/run/libvirt/uml"
endif
if WITH_NETWORK
$(MKDIR_P) "$(DESTDIR)$(localstatedir)/lib/libvirt/iptables/filter"
$(MKDIR_P) "$(DESTDIR)$(localstatedir)/lib/libvirt/iptables/nat"
$(MKDIR_P) "$(DESTDIR)$(localstatedir)/lib/libvirt/network"
$(MKDIR_P) "$(DESTDIR)$(localstatedir)/run/libvirt/network"
endif
CLEANFILES = *.gcov .libs/*.gcda .libs/*.gcno *.gcno *.gcda
DISTCLEANFILES = $(BUILT_SOURCES)

37
src/bridge.c
View File

@ -163,6 +163,43 @@ int brAddBridge (brControl *ctl ATTRIBUTE_UNUSED,
}
#endif
#ifdef SIOCBRDELBR
int
brHasBridge(brControl *ctl,
const char *name)
{
struct ifreq ifr;
int len;
if (!ctl || !name) {
errno = EINVAL;
return -1;
}
if ((len = strlen(name)) >= BR_IFNAME_MAXLEN) {
errno = EINVAL;
return -1;
}
memset(&ifr, 0, sizeof(struct ifreq));
strncpy(ifr.ifr_name, name, len);
ifr.ifr_name[len] = '\0';
if (ioctl(ctl->fd, SIOCGIFFLAGS, &ifr))
return -1;
return 0;
}
#else
int
brHasBridge(brControl *ctl,
const char *name)
{
return EINVAL;
}
#endif
/**
* brDeleteBridge:
* @ctl: bridge control pointer

2
src/bridge.h
View File

@ -50,6 +50,8 @@ int brAddBridge (brControl *ctl,
char **name);
int brDeleteBridge (brControl *ctl,
const char *name);
int brHasBridge (brControl *ctl,
const char *name);
int brAddInterface (brControl *ctl,
const char *bridge,

1
src/libvirt_bridge.syms
View File

@ -9,6 +9,7 @@ brAddBridge;
brAddInterface;
brAddTap;
brDeleteBridge;
brHasBridge;
brInit;
brSetEnableSTP;
brSetForwardDelay;

2
src/libvirt_private.syms
View File

@ -192,6 +192,7 @@ virFree;
# network_conf.h
virNetworkAssignDef;
virNetworkConfigFile;
virNetworkDefFormat;
virNetworkDefFree;
virNetworkDefParseFile;
@ -204,6 +205,7 @@ virNetworkLoadAllConfigs;
virNetworkObjListFree;
virNetworkDefParseNode;
virNetworkRemoveInactive;
virNetworkSaveConfigXML;
virNetworkSaveConfig;
virNetworkObjLock;
virNetworkObjUnlock;

130
src/network_conf.c
View File

@ -125,9 +125,6 @@ void virNetworkObjFree(virNetworkObjPtr net)
virNetworkDefFree(net->def);
virNetworkDefFree(net->newDef);
VIR_FREE(net->configFile);
VIR_FREE(net->autostartLink);
virMutexDestroy(&net->lock);
VIR_FREE(net);
@ -641,31 +638,17 @@ char *virNetworkDefFormat(virConnectPtr conn,
return NULL;
}
int virNetworkSaveConfig(virConnectPtr conn,
const char *configDir,
const char *autostartDir,
virNetworkObjPtr net)
int virNetworkSaveXML(virConnectPtr conn,
const char *configDir,
virNetworkDefPtr def,
const char *xml)
{
char *xml;
char *configFile = NULL;
int fd = -1, ret = -1;
size_t towrite;
int err;
if (!net->configFile &&
virAsprintf(&net->configFile, "%s/%s.xml",
configDir, net->def->name) < 0) {
virNetworkReportError(conn, VIR_ERR_NO_MEMORY, NULL);
goto cleanup;
}
if (!net->autostartLink &&
virAsprintf(&net->autostartLink, "%s/%s.xml",
autostartDir, net->def->name) < 0) {
virNetworkReportError(conn, VIR_ERR_NO_MEMORY, NULL);
goto cleanup;
}
if (!(xml = virNetworkDefFormat(conn,
net->newDef ? net->newDef : net->def)))
if ((configFile = virNetworkConfigFile(conn, configDir, def->name)) == NULL)
goto cleanup;
if ((err = virFileMakePath(configDir))) {
@ -675,19 +658,12 @@ int virNetworkSaveConfig(virConnectPtr conn,
goto cleanup;
}
if ((err = virFileMakePath(autostartDir))) {
virReportSystemError(conn, err,
_("cannot create autostart directory '%s'"),
autostartDir);
goto cleanup;
}
if ((fd = open(net->configFile,
if ((fd = open(configFile,
O_WRONLY | O_CREAT | O_TRUNC,
S_IRUSR | S_IWUSR )) < 0) {
virReportSystemError(conn, errno,
_("cannot create config file '%s'"),
net->configFile);
configFile);
goto cleanup;
}
@ -695,48 +671,63 @@ int virNetworkSaveConfig(virConnectPtr conn,
if (safewrite(fd, xml, towrite) < 0) {
virReportSystemError(conn, errno,
_("cannot write config file '%s'"),
net->configFile);
configFile);
goto cleanup;
}
if (close(fd) < 0) {
virReportSystemError(conn, errno,
_("cannot save config file '%s'"),
net->configFile);
configFile);
goto cleanup;
}
ret = 0;
cleanup:
VIR_FREE(xml);
if (fd != -1)
close(fd);
VIR_FREE(configFile);
return ret;
}
int virNetworkSaveConfig(virConnectPtr conn,
const char *configDir,
virNetworkDefPtr def)
{
int ret = -1;
char *xml;
if (!(xml = virNetworkDefFormat(conn, def)))
goto cleanup;
if (virNetworkSaveXML(conn, configDir, def, xml))
goto cleanup;
ret = 0;
cleanup:
VIR_FREE(xml);
return ret;
}
virNetworkObjPtr virNetworkLoadConfig(virConnectPtr conn,
virNetworkObjListPtr nets,
const char *configDir,
const char *autostartDir,
const char *file)
const char *name)
{
char *configFile = NULL, *autostartLink = NULL;
virNetworkDefPtr def = NULL;
virNetworkObjPtr net;
int autostart;
if (virAsprintf(&configFile, "%s/%s",
configDir, file) < 0) {
virNetworkReportError(conn, VIR_ERR_NO_MEMORY, NULL);
if ((configFile = virNetworkConfigFile(conn, configDir, name)) == NULL)
goto error;
}
if (virAsprintf(&autostartLink, "%s/%s",
autostartDir, file) < 0) {
virNetworkReportError(conn, VIR_ERR_NO_MEMORY, NULL);
if ((autostartLink = virNetworkConfigFile(conn, autostartDir, name)) == NULL)
goto error;
}
if ((autostart = virFileLinkPointsTo(autostartLink, configFile)) < 0)
goto error;
@ -744,7 +735,7 @@ virNetworkObjPtr virNetworkLoadConfig(virConnectPtr conn,
if (!(def = virNetworkDefParseFile(conn, configFile)))
goto error;
if (!virFileMatchesNameSuffix(file, def->name, ".xml")) {
if (!STREQ(name, def->name)) {
virNetworkReportError(conn, VIR_ERR_INTERNAL_ERROR,
_("Network config filename '%s'"
" does not match network name '%s'"),
@ -755,10 +746,11 @@ virNetworkObjPtr virNetworkLoadConfig(virConnectPtr conn,
if (!(net = virNetworkAssignDef(conn, nets, def)))
goto error;
net->configFile = configFile;
net->autostartLink = autostartLink;
net->autostart = autostart;
VIR_FREE(configFile);
VIR_FREE(autostartLink);
return net;
error:
@ -791,7 +783,7 @@ int virNetworkLoadAllConfigs(virConnectPtr conn,
if (entry->d_name[0] == '.')
continue;
if (!virFileHasSuffix(entry->d_name, ".xml"))
if (!virFileStripSuffix(entry->d_name, ".xml"))
continue;
/* NB: ignoring errors, so one malformed config doesn't
@ -811,27 +803,51 @@ int virNetworkLoadAllConfigs(virConnectPtr conn,
}
int virNetworkDeleteConfig(virConnectPtr conn,
const char *configDir,
const char *autostartDir,
virNetworkObjPtr net)
{
if (!net->configFile || !net->autostartLink) {
virNetworkReportError(conn, VIR_ERR_INTERNAL_ERROR,
_("no config file for %s"), net->def->name);
return -1;
}
char *configFile = NULL;
char *autostartLink = NULL;
if ((configFile = virNetworkConfigFile(conn, configDir, net->def->name)) == NULL)
goto error;
if ((autostartLink = virNetworkConfigFile(conn, autostartDir, net->def->name)) == NULL)
goto error;
/* Not fatal if this doesn't work */
unlink(net->autostartLink);
unlink(autostartLink);
if (unlink(net->configFile) < 0) {
if (unlink(configFile) < 0) {
virReportSystemError(conn, errno,
_("cannot remove config file '%s'"),
net->configFile);
return -1;
configFile);
goto error;
}
return 0;
error:
VIR_FREE(configFile);
VIR_FREE(autostartLink);
return -1;
}
char *virNetworkConfigFile(virConnectPtr conn,
const char *dir,
const char *name)
{
char *ret = NULL;
if (virAsprintf(&ret, "%s/%s.xml", dir, name) < 0) {
virNetworkReportError(conn, VIR_ERR_NO_MEMORY, NULL);
return NULL;
}
return ret;
}
void virNetworkObjLock(virNetworkObjPtr obj)
{
virMutexLock(&obj->lock);

18
src/network_conf.h
View File

@ -90,9 +90,6 @@ struct _virNetworkObj {
unsigned int autostart : 1;
unsigned int persistent : 1;
char *configFile; /* Persistent config file path */
char *autostartLink; /* Symlink path for autostart */
virNetworkDefPtr def; /* The current definition */
virNetworkDefPtr newDef; /* New definition to activate at shutdown */
};
@ -139,10 +136,14 @@ char *virNetworkDefFormat(virConnectPtr conn,
const virNetworkDefPtr def);
int virNetworkSaveXML(virConnectPtr conn,
const char *configDir,
virNetworkDefPtr def,
const char *xml);
int virNetworkSaveConfig(virConnectPtr conn,
const char *configDir,
const char *autostartDir,
virNetworkObjPtr net);
virNetworkDefPtr def);
virNetworkObjPtr virNetworkLoadConfig(virConnectPtr conn,
virNetworkObjListPtr nets,
@ -156,8 +157,15 @@ int virNetworkLoadAllConfigs(virConnectPtr conn,
const char *autostartDir);
int virNetworkDeleteConfig(virConnectPtr conn,
const char *configDir,
const char *autostartDir,
virNetworkObjPtr net);
char *virNetworkConfigFile(virConnectPtr conn,
const char *dir,
const char *name);
void virNetworkObjLock(virNetworkObjPtr obj);
void virNetworkObjUnlock(virNetworkObjPtr obj);

266
src/network_driver.c
View File

@ -57,6 +57,8 @@
#include "iptables.h"
#include "bridge.h"
#define NETWORK_PID_DIR LOCAL_STATE_DIR "/run/libvirt/network"
#define NETWORK_STATE_DIR LOCAL_STATE_DIR "/lib/libvirt/network"
#define VIR_FROM_THIS VIR_FROM_NETWORK
@ -105,6 +107,68 @@ static int networkShutdownNetworkDaemon(virConnectPtr conn,
static struct network_driver *driverState = NULL;
static void
networkFindActiveConfigs(struct network_driver *driver) {
unsigned int i;
for (i = 0 ; i < driver->networks.count ; i++) {
virNetworkObjPtr obj = driver->networks.objs[i];
virNetworkDefPtr tmp;
char *config;
virNetworkObjLock(obj);
if ((config = virNetworkConfigFile(NULL,
NETWORK_STATE_DIR,
obj->def->name)) == NULL) {
virNetworkObjUnlock(obj);
continue;
}
if (access(config, R_OK) < 0) {
VIR_FREE(config);
virNetworkObjUnlock(obj);
continue;
}
/* Try and load the live config */
tmp = virNetworkDefParseFile(NULL, config);
VIR_FREE(config);
if (tmp) {
obj->newDef = obj->def;
obj->def = tmp;
}
/* If bridge exists, then mark it active */
if (obj->def->bridge &&
brHasBridge(driver->brctl, obj->def->bridge) == 0) {
obj->active = 1;
/* Finally try and read dnsmasq pid if any DHCP ranges are set */
if (obj->def->nranges &&
virFileReadPid(NETWORK_PID_DIR, obj->def->name,
&obj->dnsmasqPid) == 0) {
/* Check its still alive */
if (kill(obj->dnsmasqPid, 0) != 0)
obj->dnsmasqPid = -1;
#ifdef __linux__
char *pidpath;
virAsprintf(&pidpath, "/proc/%d/exe", obj->dnsmasqPid);
if (virFileLinkPointsTo(pidpath, DNSMASQ) == 0)
obj->dnsmasqPid = -1;
VIR_FREE(pidpath);
#endif
}
}
virNetworkObjUnlock(obj);
}
}
static void
networkAutostartConfigs(struct network_driver *driver) {
unsigned int i;
@ -133,6 +197,7 @@ networkStartup(void) {
uid_t uid = geteuid();
struct passwd *pw;
char *base = NULL;
int err;
if (VIR_ALLOC(driverState) < 0)
goto error;
@ -178,12 +243,26 @@ networkStartup(void) {
VIR_FREE(base);
if ((err = brInit(&driverState->brctl))) {
virReportSystemError(NULL, err, "%s",
_("cannot initialize bridge support"));
goto error;
}
if (!(driverState->iptables = iptablesContextNew())) {
networkReportError(NULL, NULL, NULL, VIR_ERR_NO_MEMORY,
"%s", _("failed to allocate space for IP tables support"));
goto error;
}
if (virNetworkLoadAllConfigs(NULL,
&driverState->networks,
driverState->networkConfigDir,
driverState->networkAutostartDir) < 0)
goto error;
networkFindActiveConfigs(driverState);
networkAutostartConfigs(driverState);
networkDriverUnlock(driverState);
@ -266,23 +345,11 @@ networkActive(void) {
*/
static int
networkShutdown(void) {
unsigned int i;
if (!driverState)
return -1;
networkDriverLock(driverState);
/* shutdown active networks */
for (i = 0 ; i < driverState->networks.count ; i++) {
virNetworkObjPtr net = driverState->networks.objs[i];
virNetworkObjLock(net);
if (virNetworkIsActive(net))
networkShutdownNetworkDaemon(NULL, driverState,
driverState->networks.objs[i]);
virNetworkObjUnlock(net);
}
/* free inactive networks */
virNetworkObjListFree(&driverState->networks);
@ -306,23 +373,42 @@ networkShutdown(void) {
static int
networkBuildDnsmasqArgv(virConnectPtr conn,
virNetworkObjPtr network,
const char ***argv) {
virNetworkObjPtr network,
const char *pidfile,
const char ***argv) {
int i, len, r;
char buf[PATH_MAX];
char *pidfileArg;
char buf[1024];
/*
* NB, be careful about syntax for dnsmasq options in long format
*
* If the flag has a mandatory argument, it can be given using
* either syntax:
*
* --foo bar
* --foo=bar
*
* If the flag has a optional argument, it *must* be given using
* the syntax:
*
* --foo=bar
*
* It is hard to determine whether a flag is optional or not,
* without reading the dnsmasq source :-( The manpages is not
* very explicit on this
*/
len =
1 + /* dnsmasq */
1 + /* --keep-in-foreground */
1 + /* --strict-order */
1 + /* --bind-interfaces */
(network->def->domain?2:0) + /* --domain name */
2 + /* --pid-file "" */
2 + /* --pid-file /var/run/libvirt/network/$NAME.pid */
2 + /* --conf-file "" */
/*2 + *//* --interface virbr0 */
2 + /* --except-interface lo */
2 + /* --listen-address 10.0.0.1 */
1 + /* --dhcp-leasefile=path */
(2 * network->def->nranges) + /* --dhcp-range 10.0.0.2,10.0.0.254 */
/* --dhcp-host 01:23:45:67:89:0a,hostname,10.0.0.3 */
(2 * network->def->nhosts) +
@ -336,11 +422,13 @@ networkBuildDnsmasqArgv(virConnectPtr conn,
goto no_memory; \
} while (0)
#define APPEND_ARG_LIT(v, n, s) \
(v)[(n)] = s
i = 0;
APPEND_ARG(*argv, i++, DNSMASQ);
APPEND_ARG(*argv, i++, "--keep-in-foreground");
/*
* Needed to ensure dnsmasq uses same algorithm for processing
* multiple namedriver entries in /etc/resolv.conf as GLibC.
@ -353,10 +441,11 @@ networkBuildDnsmasqArgv(virConnectPtr conn,
APPEND_ARG(*argv, i++, network->def->domain);
}
APPEND_ARG(*argv, i++, "--pid-file");
APPEND_ARG(*argv, i++, "");
if (virAsprintf(&pidfileArg, "--pid-file=%s", pidfile) < 0)
goto no_memory;
APPEND_ARG_LIT(*argv, i++, pidfileArg);
APPEND_ARG(*argv, i++, "--conf-file");
APPEND_ARG(*argv, i++, "--conf-file=");
APPEND_ARG(*argv, i++, "");
/*
@ -374,15 +463,6 @@ networkBuildDnsmasqArgv(virConnectPtr conn,
APPEND_ARG(*argv, i++, "--except-interface");
APPEND_ARG(*argv, i++, "lo");
/*
* NB, dnsmasq command line arg bug means we need to
* use a single arg '--dhcp-leasefile=path' rather than
* two separate args in '--dhcp-leasefile path' style
*/
snprintf(buf, sizeof(buf), "--dhcp-leasefile=%s/lib/libvirt/dhcp-%s.leases",
LOCAL_STATE_DIR, network->def->name);
APPEND_ARG(*argv, i++, buf);
for (r = 0 ; r < network->def->nranges ; r++) {
snprintf(buf, sizeof(buf), "%s,%s",
network->def->ranges[r].start,
@ -431,7 +511,10 @@ dhcpStartDhcpDaemon(virConnectPtr conn,
virNetworkObjPtr network)
{
const char **argv;
int ret, i;
char *pidfile;
int ret = -1, i, err;
network->dnsmasqPid = -1;
if (network->def->ipAddress == NULL) {
networkReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
@ -439,13 +522,49 @@ dhcpStartDhcpDaemon(virConnectPtr conn,
return -1;
}
argv = NULL;
if (networkBuildDnsmasqArgv(conn, network, &argv) < 0)
if ((err = virFileMakePath(NETWORK_PID_DIR)) < 0) {
virReportSystemError(conn, err,
_("cannot create directory %s"),
NETWORK_PID_DIR);
return -1;
}
if ((err = virFileMakePath(NETWORK_STATE_DIR)) < 0) {
virReportSystemError(conn, err,
_("cannot create directory %s"),
NETWORK_STATE_DIR);
return -1;
}
ret = virExec(conn, argv, NULL, NULL,
&network->dnsmasqPid, -1, NULL, NULL, VIR_EXEC_NONBLOCK);
if (!(pidfile = virFilePid(NETWORK_PID_DIR, network->def->name))) {
virReportOOMError(conn);
return -1;
}
argv = NULL;
if (networkBuildDnsmasqArgv(conn, network, pidfile, &argv) < 0) {
VIR_FREE(pidfile);
return -1;
}
if (virRun(conn, argv, NULL) < 0)
goto cleanup;
/*
* There really is no race here - when dnsmasq daemonizes,
* its leader process stays around until its child has
* actually written its pidfile. So by time virRun exits
* it has waitpid'd and guaranteed the proess has started
* and written a pid
*/
if (virFileReadPid(NETWORK_PID_DIR, network->def->name,
&network->dnsmasqPid) < 0)
goto cleanup;
ret = 0;
cleanup:
VIR_FREE(pidfile);
for (i = 0; argv[i]; i++)
VIR_FREE(argv[i]);
VIR_FREE(argv);
@ -551,13 +670,6 @@ networkAddIptablesRules(virConnectPtr conn,
virNetworkObjPtr network) {
int err;
if (!driver->iptables && !(driver->iptables = iptablesContextNew())) {
networkReportError(conn, NULL, NULL, VIR_ERR_NO_MEMORY,
"%s", _("failed to allocate space for IP tables support"));
return 0;
}
/* allow DHCP requests through to dnsmasq */
if ((err = iptablesAddTcpInput(driver->iptables, network->def->bridge, 67))) {
virReportSystemError(conn, err,
@ -722,12 +834,6 @@ static int networkStartNetworkDaemon(virConnectPtr conn,
return -1;
}
if (!driver->brctl && (err = brInit(&driver->brctl))) {
virReportSystemError(conn, err, "%s",
_("cannot initialize bridge support"));
return -1;
}
if ((err = brAddBridge(driver->brctl, &network->def->bridge))) {
virReportSystemError(conn, err,
_("cannot create bridge '%s'"),
@ -735,7 +841,6 @@ static int networkStartNetworkDaemon(virConnectPtr conn,
return -1;
}
if (brSetForwardDelay(driver->brctl, network->def->bridge, network->def->delay) < 0)
goto err_delbr;
@ -780,10 +885,22 @@ static int networkStartNetworkDaemon(virConnectPtr conn,
dhcpStartDhcpDaemon(conn, network) < 0)
goto err_delbr2;
/* Persist the live configuration now we have bridge info */
if (virNetworkSaveConfig(conn, NETWORK_STATE_DIR, network->def) < 0) {
goto err_kill;
}
network->active = 1;
return 0;
err_kill:
if (network->dnsmasqPid > 0) {
kill(network->dnsmasqPid, SIGTERM);
network->dnsmasqPid = -1;
}
err_delbr2:
networkRemoveIptablesRules(driver, network);
@ -804,16 +921,24 @@ static int networkStartNetworkDaemon(virConnectPtr conn,
}
static int networkShutdownNetworkDaemon(virConnectPtr conn ATTRIBUTE_UNUSED,
struct network_driver *driver,
virNetworkObjPtr network) {
static int networkShutdownNetworkDaemon(virConnectPtr conn,
struct network_driver *driver,
virNetworkObjPtr network) {
int err;
char *stateFile;
networkLog(NETWORK_INFO, _("Shutting down network '%s'\n"), network->def->name);
if (!virNetworkIsActive(network))
return 0;
stateFile = virNetworkConfigFile(conn, NETWORK_STATE_DIR, network->def->name);
if (!stateFile)
return -1;
unlink(stateFile);
VIR_FREE(stateFile);
if (network->dnsmasqPid > 0)
kill(network->dnsmasqPid, SIGTERM);
@ -830,13 +955,10 @@ static int networkShutdownNetworkDaemon(virConnectPtr conn ATTRIBUTE_UNUSED,
network->def->bridge, strerror(err));
}
/* See if its still alive and really really kill it */
if (network->dnsmasqPid > 0 &&
waitpid(network->dnsmasqPid, NULL, WNOHANG) != network->dnsmasqPid) {
(kill(network->dnsmasqPid, 0) == 0))
kill(network->dnsmasqPid, SIGKILL);
if (waitpid(network->dnsmasqPid, NULL, 0) != network->dnsmasqPid)
networkLog(NETWORK_WARN,
"%s", _("Got unexpected pid for dnsmasq\n"));
}
network->dnsmasqPid = -1;
network->active = 0;
@ -1054,8 +1176,7 @@ static virNetworkPtr networkDefine(virConnectPtr conn, const char *xml) {
if (virNetworkSaveConfig(conn,
driver->networkConfigDir,
driver->networkAutostartDir,
network) < 0) {
network->newDef ? network->newDef : network->def) < 0) {
virNetworkRemoveInactive(&driver->networks,
network);
network = NULL;
@ -1092,7 +1213,10 @@ static int networkUndefine(virNetworkPtr net) {
goto cleanup;
}
if (virNetworkDeleteConfig(net->conn, network) < 0)
if (virNetworkDeleteConfig(net->conn,
driver->networkConfigDir,
driver->networkAutostartDir,
network) < 0)
goto cleanup;
virNetworkRemoveInactive(&driver->networks,
@ -1146,7 +1270,7 @@ static int networkDestroy(virNetworkPtr net) {
}
ret = networkShutdownNetworkDaemon(net->conn, driver, network);
if (!network->configFile) {
if (!network->persistent) {
virNetworkRemoveInactive(&driver->networks,
network);
network = NULL;
@ -1239,9 +1363,10 @@ cleanup:
}
static int networkSetAutostart(virNetworkPtr net,
int autostart) {
int autostart) {
struct network_driver *driver = net->conn->networkPrivateData;
virNetworkObjPtr network;
char *configFile = NULL, *autostartLink = NULL;
int ret = -1;
networkDriverLock(driver);
@ -1257,6 +1382,11 @@ static int networkSetAutostart(virNetworkPtr net,
autostart = (autostart != 0);
if (network->autostart != autostart) {
if ((configFile = virNetworkConfigFile(net->conn, driver->networkConfigDir, network->def->name)) == NULL)
goto cleanup;
if ((autostartLink = virNetworkConfigFile(net->conn, driver->networkAutostartDir, network->def->name)) == NULL)
goto cleanup;
if (autostart) {
int err;
@ -1267,17 +1397,17 @@ static int networkSetAutostart(virNetworkPtr net,
goto cleanup;
}
if (symlink(network->configFile, network->autostartLink) < 0) {
if (symlink(configFile, autostartLink) < 0) {
virReportSystemError(net->conn, errno,
_("Failed to create symlink '%s' to '%s'"),
network->autostartLink, network->configFile);
autostartLink, configFile);
goto cleanup;
}
} else {
if (unlink(network->autostartLink) < 0 && errno != ENOENT && errno != ENOTDIR) {
if (unlink(autostartLink) < 0 && errno != ENOENT && errno != ENOTDIR) {
virReportSystemError(net->conn, errno,
_("Failed to delete symlink '%s'"),
network->autostartLink);
autostartLink);
goto cleanup;
}
}
@ -1287,6 +1417,8 @@ static int networkSetAutostart(virNetworkPtr net,
ret = 0;
cleanup:
VIR_FREE(configFile);
VIR_FREE(autostartLink);
if (network)
virNetworkObjUnlock(network);
return ret;