[libvirt] [PATCH v2] Introduce --without-pm-utils to get rid of pm-is-supported dependency
Cédric Bosdonnat
cbosdonnat at suse.com
Tue Apr 1 13:19:26 UTC 2014
This uses the dbus api of systemd to check the power management
capabilities of the node.
---
This replaces the previous pm-utils dropping patch attempt to implement
Cole's idea.
configure.ac | 11 ++++++++
libvirt.spec.in | 9 +++++++
src/libvirt_private.syms | 3 +++
src/util/virnodesuspend.c | 32 ++++++++++++++++++++++
src/util/virsystemd.c | 68 +++++++++++++++++++++++++++++++++++++++++++++++
src/util/virsystemd.h | 6 +++++
6 files changed, 129 insertions(+)
diff --git a/configure.ac b/configure.ac
index 73efffa..807cf0f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -563,6 +563,10 @@ AC_ARG_WITH([chrdev-lock-files],
[location for UUCP style lock files for character devices
(use auto for default paths on some platforms) @<:@default=auto@:>@])])
m4_divert_text([DEFAULTS], [with_chrdev_lock_files=auto])
+AC_ARG_WITH([pm-utils],
+ [AS_HELP_STRING([--with-pm-utils],
+ [use pm-utils for power management @<:@default=yes@:>@])])
+m4_divert_text([DEFAULTS], [with_pm_utils=yes])
dnl
dnl in case someone want to build static binaries
@@ -1621,6 +1625,12 @@ fi
AM_CONDITIONAL([WITH_PHYP],[test "$with_phyp" = "yes"])
+dnl Should we build with pm-utils support?
+if test "$with_pm_utils" = "yes"; then
+ AC_DEFINE_UNQUOTED([WITH_PM_UTILS], 1, [whether to use pm-utils])
+fi
+AM_CONDITIONAL([WITH_PM_UTILS], [test "$with_pm_utils" = "yes"])
+
dnl virsh libraries
VIRSH_LIBS="$VIRSH_LIBS $READLINE_LIBS"
AC_SUBST([VIRSH_LIBS])
@@ -2845,6 +2855,7 @@ AC_MSG_NOTICE([ rbd: $LIBRBD_LIBS])
else
AC_MSG_NOTICE([ rbd: no])
fi
+AC_MSG_NOTICE([pm-utils: $with_pm_utils])
AC_MSG_NOTICE([])
AC_MSG_NOTICE([Test suite])
diff --git a/libvirt.spec.in b/libvirt.spec.in
index eab9b23..5c20955 100644
--- a/libvirt.spec.in
+++ b/libvirt.spec.in
@@ -132,6 +132,7 @@
%define with_libssh2 0%{!?_without_libssh2:0}
%define with_wireshark 0%{!?_without_wireshark:0}
%define with_systemd_daemon 0%{!?_without_systemd_daemon:0}
+%define with_pm_utils 1
# Non-server/HV driver defaults which are always enabled
%define with_sasl 0%{!?_without_sasl:1}
@@ -182,6 +183,7 @@
%if 0%{?fedora} >= 17 || 0%{?rhel} >= 7
%define with_systemd 1
%define with_systemd_daemon 1
+ %define with_pm_utils 0
%endif
# Fedora 18 / RHEL-7 are first where firewalld support is enabled
@@ -1138,8 +1140,10 @@ Requires: nc
Requires: gettext
# Needed by virt-pki-validate script.
Requires: gnutls-utils
+%if %{with_pm_utils}
# Needed for probing the power management features of the host.
Requires: pm-utils
+%{endif}
%if %{with_sasl}
Requires: cyrus-sasl
# Not technically required, but makes 'out-of-box' config
@@ -1395,6 +1399,10 @@ driver
%define _without_systemd_daemon --without-systemd-daemon
%endif
+%if ! %{with_pm_utils}
+ %define _without_pm_utils --without-pm-utils
+%endif
+
%define when %(date +"%%F-%%T")
%define where %(hostname)
%define who %{?packager}%{!?packager:Unknown}
@@ -1471,6 +1479,7 @@ rm -f po/stamp-po
%{?_with_firewalld} \
%{?_without_wireshark} \
%{?_without_systemd_daemon} \
+ %{?_without_pm_utils} \
%{with_packager} \
%{with_packager_version} \
--with-qemu-user=%{qemu_user} \
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 38fbf63..ce51bdf 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -1879,6 +1879,9 @@ virSysinfoSetup;
# util/virsystemd.h
+virSystemdCanHibernate;
+virSystemdCanHybridSleep;
+virSystemdCanSuspend;
virSystemdCreateMachine;
virSystemdMakeMachineName;
virSystemdMakeScopeName;
diff --git a/src/util/virnodesuspend.c b/src/util/virnodesuspend.c
index 8088931..ba4a338 100644
--- a/src/util/virnodesuspend.c
+++ b/src/util/virnodesuspend.c
@@ -22,6 +22,9 @@
#include <config.h>
#include "virnodesuspend.h"
+#ifndef WITH_PM_UTILS
+# include "virsystemd.h"
+#endif
#include "vircommand.h"
#include "virthread.h"
#include "datatypes.h"
@@ -260,6 +263,7 @@ int nodeSuspendForDuration(unsigned int target,
*
* Returns 0 if the query was successful, -1 on failure.
*/
+#ifdef WITH_PM_UTILS
static int
virNodeSuspendSupportsTarget(unsigned int target, bool *supported)
{
@@ -300,6 +304,34 @@ virNodeSuspendSupportsTarget(unsigned int target, bool *supported)
virCommandFree(cmd);
return ret;
}
+#else /* ! WITH_PM_UTILS */
+static int
+virNodeSuspendSupportsTarget(unsigned int target, bool *supported)
+{
+ int ret = -1;
+
+ if (virNodeSuspendInitialize() < 0)
+ return -1;
+
+ *supported = false;
+
+ switch (target) {
+ case VIR_NODE_SUSPEND_TARGET_MEM:
+ ret = virSystemdCanSuspend(supported);
+ break;
+ case VIR_NODE_SUSPEND_TARGET_DISK:
+ ret = virSystemdCanHibernate(supported);
+ break;
+ case VIR_NODE_SUSPEND_TARGET_HYBRID:
+ ret = virSystemdCanHybridSleep(supported);
+ break;
+ default:
+ return ret;
+ }
+
+ return ret;
+}
+#endif /* WITH_PM_UTILS */
/**
* virNodeSuspendGetTargetMask:
diff --git a/src/util/virsystemd.c b/src/util/virsystemd.c
index 93b3f9c..d4c1dd3 100644
--- a/src/util/virsystemd.c
+++ b/src/util/virsystemd.c
@@ -325,3 +325,71 @@ virSystemdNotifyStartup(void)
sd_notify(0, "READY=1");
#endif
}
+
+static int
+virSystemdPMSupportTarget(const char *methodName, bool *result)
+{
+ int ret;
+ DBusConnection *conn;
+ DBusMessage *message;
+ char *response;
+
+ ret = virDBusIsServiceEnabled("org.freedesktop.login1");
+ if (ret < 0)
+ return ret;
+
+ if ((ret = virDBusIsServiceRegistered("org.freedesktop.login1")) < 0)
+ return ret;
+
+ if (!(conn = virDBusGetSystemBus()))
+ return -1;
+
+ ret = -1;
+
+ /*
+ * The systemd DBus API we're invoking has the
+ * following signature
+ *
+ * CanSuspend(out s value);
+ *
+ * @value one of 'na', 'yes', 'no' or 'challenge'
+ */
+
+ if (virDBusCallMethod(conn,
+ &message,
+ NULL,
+ "org.freedesktop.login1",
+ "/org/freedesktop/login1",
+ "org.freedesktop.login1.Manager",
+ methodName,
+ "") < 0)
+ goto cleanup;
+
+ if ((ret = virDBusMessageRead(message, "s", &response)) < 0)
+ goto cleanup;
+
+ *result = STRNEQ("no", response);
+
+ ret = 0;
+
+ cleanup:
+ dbus_message_unref(message);
+ VIR_FREE(response);
+
+ return ret;
+}
+
+int virSystemdCanSuspend(bool *result)
+{
+ return virSystemdPMSupportTarget("CanSuspend", result);
+}
+
+int virSystemdCanHibernate(bool *result)
+{
+ return virSystemdPMSupportTarget("CanHibernate", result);
+}
+
+int virSystemdCanHybridSleep(bool *result)
+{
+ return virSystemdPMSupportTarget("CanHybridSleep", result);
+}
diff --git a/src/util/virsystemd.h b/src/util/virsystemd.h
index 7fed456..491c9b7 100644
--- a/src/util/virsystemd.h
+++ b/src/util/virsystemd.h
@@ -48,4 +48,10 @@ int virSystemdTerminateMachine(const char *name,
void virSystemdNotifyStartup(void);
+int virSystemdCanSuspend(bool *result);
+
+int virSystemdCanHibernate(bool *result);
+
+int virSystemdCanHybridSleep(bool *result);
+
#endif /* __VIR_SYSTEMD_H__ */
--
1.8.4.5
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