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authorKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2014-04-04 14:53:41 -0400
committerDavid Vrabel <david.vrabel@citrix.com>2014-04-15 17:41:29 +0100
commiteb47f71200b7d5b4c8c1f8c75675f592d855aafd (patch)
tree2987b1a68597d0753bbb16f6259ea1008cf203ac /drivers/xen
parent027bd7e89906a076225b23d1ca4b6702c84e72dc (diff)
downloadop-kernel-dev-eb47f71200b7d5b4c8c1f8c75675f592d855aafd.zip
op-kernel-dev-eb47f71200b7d5b4c8c1f8c75675f592d855aafd.tar.gz
xen/manage: Poweroff forcefully if user-space is not yet up.
The user can launch the guest in this sequence: xl create -p /vm.cfg [launch, but pause it] xl shutdown latest [sets control/shutdown=poweroff] xl unpause latest xl console latest [and see that the guest has completely ignored the shutdown request] In reality the guest hasn't ignored it. It registers a watch and gets a notification that there is value. It then calls the shutdown_handler which ends up calling orderly_shutdown. Unfortunately that is so early in the bootup that there are no user-space. Which means that the orderly_shutdown fails. But since the force flag was set to false it continues on without reporting. What we really want to is to use the force when we are in the SYSTEM_BOOTING state and not use the 'force' when SYSTEM_RUNNING. However, if we are in the running state - and the shutdown command has been given before the user-space has been setup, there is nothing we can do. Worst yet, we stop ignoring the 'xl shutdown' requests! As such, the other part of this patch is to only stop ignoring the 'xl shutdown' when we are truly in the power off sequence. That means the user can do multiple 'xl shutdown' and we will try to act on them instead of ignoring them. Fixes-Bug: http://bugs.xenproject.org/xen/bug/6 Reported-by: Alex Bligh <alex@alex.org.uk> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Diffstat (limited to 'drivers/xen')
-rw-r--r--drivers/xen/manage.c32
1 files changed, 30 insertions, 2 deletions
diff --git a/drivers/xen/manage.c b/drivers/xen/manage.c
index fc6c94c..32f9236 100644
--- a/drivers/xen/manage.c
+++ b/drivers/xen/manage.c
@@ -198,10 +198,32 @@ struct shutdown_handler {
void (*cb)(void);
};
+static int poweroff_nb(struct notifier_block *cb, unsigned long code, void *unused)
+{
+ switch (code) {
+ case SYS_DOWN:
+ case SYS_HALT:
+ case SYS_POWER_OFF:
+ shutting_down = SHUTDOWN_POWEROFF;
+ default:
+ break;
+ }
+ return NOTIFY_DONE;
+}
static void do_poweroff(void)
{
- shutting_down = SHUTDOWN_POWEROFF;
- orderly_poweroff(false);
+ switch (system_state) {
+ case SYSTEM_BOOTING:
+ orderly_poweroff(true);
+ break;
+ case SYSTEM_RUNNING:
+ orderly_poweroff(false);
+ break;
+ default:
+ /* Don't do it when we are halting/rebooting. */
+ pr_info("Ignoring Xen toolstack shutdown.\n");
+ break;
+ }
}
static void do_reboot(void)
@@ -307,6 +329,10 @@ static struct xenbus_watch shutdown_watch = {
.callback = shutdown_handler
};
+static struct notifier_block xen_reboot_nb = {
+ .notifier_call = poweroff_nb,
+};
+
static int setup_shutdown_watcher(void)
{
int err;
@@ -317,6 +343,7 @@ static int setup_shutdown_watcher(void)
return err;
}
+
#ifdef CONFIG_MAGIC_SYSRQ
err = register_xenbus_watch(&sysrq_watch);
if (err) {
@@ -345,6 +372,7 @@ int xen_setup_shutdown_event(void)
if (!xen_domain())
return -ENODEV;
register_xenstore_notifier(&xenstore_notifier);
+ register_reboot_notifier(&xen_reboot_nb);
return 0;
}
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