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iucv: suspend/resume error msg for left over pathes

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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: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ursula Braun 2009-09-16 04:37:22 +00:00 committed by David S. Miller
parent 12cbcfd386
commit 4c89d86b4d
1 changed files with 14 additions and 0 deletions
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14
net/iucv/iucv.c
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@ -79,6 +79,14 @@ static int iucv_bus_match(struct device *dev, struct device_driver *drv)
return 0; 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 int iucv_pm_prepare(struct device *);
static void iucv_pm_complete(struct device *); static void iucv_pm_complete(struct device *);
static int iucv_pm_freeze(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 #ifdef CONFIG_PM_DEBUG
printk(KERN_WARNING "iucv_pm_freeze\n"); printk(KERN_WARNING "iucv_pm_freeze\n");
#endif #endif
iucv_pm_state = IUCV_PM_FREEZING;
for_each_cpu_mask_nr(cpu, iucv_irq_cpumask) for_each_cpu_mask_nr(cpu, iucv_irq_cpumask)
smp_call_function_single(cpu, iucv_block_cpu_almost, NULL, 1); smp_call_function_single(cpu, iucv_block_cpu_almost, NULL, 1);
if (dev->driver && dev->driver->pm && dev->driver->pm->freeze) 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 #ifdef CONFIG_PM_DEBUG
printk(KERN_WARNING "iucv_pm_thaw\n"); printk(KERN_WARNING "iucv_pm_thaw\n");
#endif #endif
iucv_pm_state = IUCV_PM_THAWING;
if (!iucv_path_table) { if (!iucv_path_table) {
rc = iucv_enable(); rc = iucv_enable();
if (rc) if (rc)
@ -1933,6 +1943,10 @@ static int iucv_pm_restore(struct device *dev)
#ifdef CONFIG_PM_DEBUG #ifdef CONFIG_PM_DEBUG
printk(KERN_WARNING "iucv_pm_restore %p\n", iucv_path_table); printk(KERN_WARNING "iucv_pm_restore %p\n", iucv_path_table);
#endif #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)) { if (cpus_empty(iucv_irq_cpumask)) {
rc = iucv_query_maxconn(); rc = iucv_query_maxconn();
rc = iucv_enable(); rc = iucv_enable();