diff options
Diffstat (limited to 'drivers/block/drbd/drbd_main.c')
| -rw-r--r-- | drivers/block/drbd/drbd_main.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index 3ee4a44cb225..f66294db3b08 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -117,6 +117,7 @@ module_param_string(usermode_helper, usermode_helper, sizeof(usermode_helper), 0 */ struct idr drbd_devices; struct list_head drbd_resources; +struct mutex resources_mutex; struct kmem_cache *drbd_request_cache; struct kmem_cache *drbd_ee_cache; /* peer requests */ @@ -2923,7 +2924,7 @@ static int __init drbd_init(void) drbd_proc = NULL; /* play safe for drbd_cleanup */ idr_init(&drbd_devices); - rwlock_init(&global_state_lock); + mutex_init(&resources_mutex); INIT_LIST_HEAD(&drbd_resources); err = drbd_genl_register(); @@ -3746,6 +3747,27 @@ int drbd_wait_misc(struct drbd_device *device, struct drbd_interval *i) return 0; } +void lock_all_resources(void) +{ + struct drbd_resource *resource; + int __maybe_unused i = 0; + + mutex_lock(&resources_mutex); + local_irq_disable(); + for_each_resource(resource, &drbd_resources) + spin_lock_nested(&resource->req_lock, i++); +} + +void unlock_all_resources(void) +{ + struct drbd_resource *resource; + + for_each_resource(resource, &drbd_resources) + spin_unlock(&resource->req_lock); + local_irq_enable(); + mutex_unlock(&resources_mutex); +} + #ifdef CONFIG_DRBD_FAULT_INJECTION /* Fault insertion support including random number generator shamelessly * stolen from kernel/rcutorture.c */ |