EXPORT_SYMBOL(bdevname);
+const char *bio_devname(struct bio *bio, char *buf)
+{
+ return disk_name(bio->bi_disk, bio->bi_partno, buf);
+}
+EXPORT_SYMBOL(bio_devname);
+
/*
* There's very little reason to use this, you should really
* have a struct block_device just about everywhere and use
jiffies_to_msecs(part_stat_read(p, time_in_queue)));
}
-ssize_t part_inflight_show(struct device *dev,
- struct device_attribute *attr, char *buf)
+ssize_t part_inflight_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
{
struct hd_struct *p = dev_to_part(dev);
+ struct request_queue *q = part_to_disk(p)->queue;
+ unsigned int inflight[2];
- return sprintf(buf, "%8u %8u\n", atomic_read(&p->in_flight[0]),
- atomic_read(&p->in_flight[1]));
+ part_in_flight_rw(q, p, inflight);
+ return sprintf(buf, "%8u %8u\n", inflight[0], inflight[1]);
}
#ifdef CONFIG_FAIL_MAKE_REQUEST
.uevent = part_uevent,
};
-static void delete_partition_rcu_cb(struct rcu_head *head)
+static void delete_partition_work_fn(struct work_struct *work)
{
- struct hd_struct *part = container_of(head, struct hd_struct, rcu_head);
+ struct hd_struct *part = container_of(to_rcu_work(work), struct hd_struct,
+ rcu_work);
part->start_sect = 0;
part->nr_sects = 0;
void __delete_partition(struct percpu_ref *ref)
{
struct hd_struct *part = container_of(ref, struct hd_struct, ref);
- call_rcu(&part->rcu_head, delete_partition_rcu_cb);
+ INIT_RCU_WORK(&part->rcu_work, delete_partition_work_fn);
+ queue_rcu_work(system_wq, &part->rcu_work);
}
/*
kobject_put(part->holder_dir);
device_del(part_to_dev(part));
+ /*
+ * Remove gendisk pointer from idr so that it cannot be looked up
+ * while RCU period before freeing gendisk is running to prevent
+ * use-after-free issues. Note that the device number stays
+ * "in-use" until we really free the gendisk.
+ */
+ blk_invalidate_devt(part_devt(part));
hd_struct_kill(part);
}