@@ -1479,6 +1479,31 @@ static bool dm_table_supports_write_same(struct dm_table *t)
return true;
}
+static int device_supports_secdiscard(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 blk_queue_secdiscard(q);
+}
+
+static bool dm_targets_support_secdiscard(struct dm_table *t)
+{
+ unsigned i = 0;
+ struct dm_target *ti;
+
+ while (i < dm_table_get_num_targets(t)) {
+ ti = dm_table_get_target(t, i++);
+ if (!ti->type->iterate_devices ||
+ !ti->type->iterate_devices(ti, device_supports_secdiscard,
+ NULL))
+ return false;
+ }
+
+ return true;
+
+}
+
void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
struct queue_limits *limits)
{
@@ -1536,6 +1561,11 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queu
smp_mb();
if (dm_table_request_based(t))
queue_flag_set_unlocked(QUEUE_FLAG_STACKABLE, q);
+
+ barrier();
+ if (dm_targets_support_secdiscard(t))
+ queue_flag_set_unlocked(QUEUE_FLAG_SECDISCARD, q);
+
}
--
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