Merge tag 'for-4.17/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git...

[linux-2.6-microblaze.git] / drivers / md / dm-table.c

diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 954f4e3..0589a4d 100644 (file)
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -1846,6 +1846,34 @@ static bool dm_table_supports_discards(struct dm_table *t)
        return true;
 }
 
+static int device_not_secure_erase_capable(struct dm_target *ti,
+                                          struct dm_dev *dev, sector_t start,
+                                          sector_t len, void *data)
+{
+       struct request_queue *q = bdev_get_queue(dev->bdev);
+
+       return q && !blk_queue_secure_erase(q);
+}
+
+static bool dm_table_supports_secure_erase(struct dm_table *t)
+{
+       struct dm_target *ti;
+       unsigned int i;
+
+       for (i = 0; i < dm_table_get_num_targets(t); i++) {
+               ti = dm_table_get_target(t, i);
+
+               if (!ti->num_secure_erase_bios)
+                       return false;
+
+               if (!ti->type->iterate_devices ||
+                   ti->type->iterate_devices(ti, device_not_secure_erase_capable, NULL))
+                       return false;
+       }
+
+       return true;
+}
+
 void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
                               struct queue_limits *limits)
 {
@@ -1867,6 +1895,9 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
        } else
                blk_queue_flag_set(QUEUE_FLAG_DISCARD, q);
 
+       if (dm_table_supports_secure_erase(t))
+               blk_queue_flag_set(QUEUE_FLAG_SECERASE, q);
+
        if (dm_table_supports_flush(t, (1UL << QUEUE_FLAG_WC))) {
                wc = true;
                if (dm_table_supports_flush(t, (1UL << QUEUE_FLAG_FUA)))