Commit 4c89d86b authored by Ursula Braun's avatar Ursula Braun Committed by David S. Miller
Browse files

iucv: suspend/resume error msg for left over pathes 



During suspend IUCV exploiters have to close their IUCV connections.
When restoring an image, it can be checked if all IUCV pathes had
been closed before the Linux instance was suspended. If not, an
error message is issued to indicate a problem in one of the
used programs exploiting IUCV communication.

Signed-off-by: default avatarUrsula Braun <ursula.braun@de.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 12cbcfd3

net/iucv/iucv.c

+14 −0
Original line number Diff line number Diff line
@@ -79,6 +79,14 @@ static int iucv_bus_match(struct device *dev, struct device_driver *drv) 
	return 0;

}



enum iucv_pm_states {

	IUCV_PM_INITIAL = 0,

	IUCV_PM_FREEZING = 1,

	IUCV_PM_THAWING = 2,

	IUCV_PM_RESTORING = 3,

};

static enum iucv_pm_states iucv_pm_state;



static int iucv_pm_prepare(struct device *);

static void iucv_pm_complete(struct device *);

static int iucv_pm_freeze(struct device *);
@@ -1875,6 +1883,7 @@ static int iucv_pm_freeze(struct device *dev) 
#ifdef CONFIG_PM_DEBUG

	printk(KERN_WARNING "iucv_pm_freeze\n");

#endif

	iucv_pm_state = IUCV_PM_FREEZING;

	for_each_cpu_mask_nr(cpu, iucv_irq_cpumask)

		smp_call_function_single(cpu, iucv_block_cpu_almost, NULL, 1);

	if (dev->driver && dev->driver->pm && dev->driver->pm->freeze)
@@ -1899,6 +1908,7 @@ static int iucv_pm_thaw(struct device *dev) 
#ifdef CONFIG_PM_DEBUG

	printk(KERN_WARNING "iucv_pm_thaw\n");

#endif

	iucv_pm_state = IUCV_PM_THAWING;

	if (!iucv_path_table) {

		rc = iucv_enable();

		if (rc)
@@ -1933,6 +1943,10 @@ static int iucv_pm_restore(struct device *dev) 
#ifdef CONFIG_PM_DEBUG

	printk(KERN_WARNING "iucv_pm_restore %p\n", iucv_path_table);

#endif

	if ((iucv_pm_state != IUCV_PM_RESTORING) && iucv_path_table)

		pr_warning("Suspending Linux did not completely close all IUCV "

			"connections\n");

	iucv_pm_state = IUCV_PM_RESTORING;

	if (cpus_empty(iucv_irq_cpumask)) {

		rc = iucv_query_maxconn();

		rc = iucv_enable();

CRA Git | Maintained and supported by SUSTech CRA and CCSE