#include <linux/bio.h>
#include <linux/slab.h>
+#define DM_MSG_PREFIX "target"
+
struct tt_internal {
struct target_type tt;
static struct tt_internal *alloc_target(struct target_type *t)
{
- struct tt_internal *ti = kmalloc(sizeof(*ti), GFP_KERNEL);
+ struct tt_internal *ti = kzalloc(sizeof(*ti), GFP_KERNEL);
- if (ti) {
- memset(ti, 0, sizeof(*ti));
+ if (ti)
ti->tt = *t;
- }
return ti;
}
return rv;
}
-int dm_unregister_target(struct target_type *t)
+void dm_unregister_target(struct target_type *t)
{
struct tt_internal *ti;
down_write(&_lock);
if (!(ti = __find_target_type(t->name))) {
- up_write(&_lock);
- return -EINVAL;
+ DMCRIT("Unregistering unrecognised target: %s", t->name);
+ BUG();
}
if (ti->use) {
- up_write(&_lock);
- return -ETXTBSY;
+ DMCRIT("Attempt to unregister target still in use: %s",
+ t->name);
+ BUG();
}
list_del(&ti->list);
kfree(ti);
up_write(&_lock);
- return 0;
}
/*
void dm_target_exit(void)
{
- if (dm_unregister_target(&error_target))
- DMWARN("error target unregistration failed");
+ dm_unregister_target(&error_target);
}
EXPORT_SYMBOL(dm_register_target);