#include <linux/init.h>
#include <linux/bio.h>
+#define DM_MSG_PREFIX "zero"
+
/*
* Construct a dummy mapping that only returns zeros
*/
static int zero_ctr(struct dm_target *ti, unsigned int argc, char **argv)
{
if (argc != 0) {
- ti->error = "dm-zero: No arguments required";
+ ti->error = "No arguments required";
return -EINVAL;
}
break;
}
- bio_endio(bio, bio->bi_size, 0);
+ bio_endio(bio, 0);
/* accepted bio, don't make new request */
- return 0;
+ return DM_MAPIO_SUBMITTED;
}
static struct target_type zero_target = {
int r = dm_register_target(&zero_target);
if (r < 0)
- DMERR("zero: register failed %d", r);
+ DMERR("register failed %d", r);
return r;
}
int r = dm_unregister_target(&zero_target);
if (r < 0)
- DMERR("zero: unregister failed %d", r);
+ DMERR("unregister failed %d", r);
}
module_init(dm_zero_init)