+ struct dm_target *uninitialized_var(ti);
+ struct queue_limits ti_limits;
+ unsigned i = 0;
+
+ blk_set_default_limits(limits);
+
+ while (i < dm_table_get_num_targets(table)) {
+ blk_set_default_limits(&ti_limits);
+
+ ti = dm_table_get_target(table, i++);
+
+ if (!ti->type->iterate_devices)
+ goto combine_limits;
+
+ /*
+ * Combine queue limits of all the devices this target uses.
+ */
+ ti->type->iterate_devices(ti, dm_set_device_limits,
+ &ti_limits);
+
+ /* Set I/O hints portion of queue limits */
+ if (ti->type->io_hints)
+ ti->type->io_hints(ti, &ti_limits);
+
+ /*
+ * Check each device area is consistent with the target's
+ * overall queue limits.
+ */
+ if (ti->type->iterate_devices(ti, device_area_is_invalid,
+ &ti_limits))
+ return -EINVAL;
+
+combine_limits:
+ /*
+ * Merge this target's queue limits into the overall limits
+ * for the table.
+ */
+ if (blk_stack_limits(limits, &ti_limits, 0) < 0)
+ DMWARN("%s: target device "
+ "(start sect %llu len %llu) "
+ "is misaligned",
+ dm_device_name(table->md),
+ (unsigned long long) ti->begin,
+ (unsigned long long) ti->len);
+ }
+
+ return validate_hardware_logical_block_alignment(table, limits);
+}
+
+/*
+ * Set the integrity profile for this device if all devices used have
+ * matching profiles.
+ */
+static void dm_table_set_integrity(struct dm_table *t)
+{
+ struct list_head *devices = dm_table_get_devices(t);
+ struct dm_dev_internal *prev = NULL, *dd = NULL;
+
+ if (!blk_get_integrity(dm_disk(t->md)))
+ return;
+
+ list_for_each_entry(dd, devices, list) {
+ if (prev &&
+ blk_integrity_compare(prev->dm_dev.bdev->bd_disk,
+ dd->dm_dev.bdev->bd_disk) < 0) {
+ DMWARN("%s: integrity not set: %s and %s mismatch",
+ dm_device_name(t->md),
+ prev->dm_dev.bdev->bd_disk->disk_name,
+ dd->dm_dev.bdev->bd_disk->disk_name);
+ goto no_integrity;
+ }
+ prev = dd;
+ }
+
+ if (!prev || !bdev_get_integrity(prev->dm_dev.bdev))
+ goto no_integrity;
+
+ blk_integrity_register(dm_disk(t->md),
+ bdev_get_integrity(prev->dm_dev.bdev));
+
+ return;
+
+no_integrity:
+ blk_integrity_register(dm_disk(t->md), NULL);
+
+ return;
+}
+
+void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
+ struct queue_limits *limits)
+{
+ /*
+ * Each target device in the table has a data area that should normally
+ * be aligned such that the DM device's alignment_offset is 0.
+ * FIXME: Propagate alignment_offsets up the stack and warn of
+ * sub-optimal or inconsistent settings.
+ */
+ limits->alignment_offset = 0;
+ limits->misaligned = 0;
+
+ /*
+ * Copy table's limits to the DM device's request_queue
+ */
+ q->limits = *limits;
+
+ if (limits->no_cluster)
+ queue_flag_clear_unlocked(QUEUE_FLAG_CLUSTER, q);
+ else
+ queue_flag_set_unlocked(QUEUE_FLAG_CLUSTER, q);
+
+ dm_table_set_integrity(t);
+