return;
template_disk = dm_table_get_integrity_disk(t, true);
- if (!template_disk &&
- blk_integrity_is_initialized(dm_disk(t->md))) {
+ if (template_disk)
+ blk_integrity_register(dm_disk(t->md),
+ blk_get_integrity(template_disk));
+ else if (blk_integrity_is_initialized(dm_disk(t->md)))
DMWARN("%s: device no longer has a valid integrity profile",
dm_device_name(t->md));
- return;
- }
- blk_integrity_register(dm_disk(t->md),
- blk_get_integrity(template_disk));
+ else
+ DMWARN("%s: unable to establish an integrity profile",
+ dm_device_name(t->md));
}
static int device_flush_capable(struct dm_target *ti, struct dm_dev *dev,
return 0;
}
+static bool dm_table_discard_zeroes_data(struct dm_table *t)
+{
+ struct dm_target *ti;
+ unsigned i = 0;
+
+ /* Ensure that all targets supports discard_zeroes_data. */
+ while (i < dm_table_get_num_targets(t)) {
+ ti = dm_table_get_target(t, i++);
+
+ if (ti->discard_zeroes_data_unsupported)
+ return 0;
+ }
+
+ return 1;
+}
+
+static int device_is_nonrot(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_nonrot(q);
+}
+
+static bool dm_table_is_nonrot(struct dm_table *t)
+{
+ struct dm_target *ti;
+ unsigned i = 0;
+
+ /* Ensure that all underlying device are non-rotational. */
+ 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_is_nonrot, NULL))
+ return 0;
+ }
+
+ return 1;
+}
+
void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
struct queue_limits *limits)
{
}
blk_queue_flush(q, flush);
+ if (!dm_table_discard_zeroes_data(t))
+ q->limits.discard_zeroes_data = 0;
+
+ if (dm_table_is_nonrot(t))
+ queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q);
+ else
+ queue_flag_clear_unlocked(QUEUE_FLAG_NONROT, q);
+
dm_table_set_integrity(t);
/*