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-rw-r--r--drivers/md/dm-table.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index e8361b191b9b..02d0b489fad6 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -879,6 +879,45 @@ struct dm_target *dm_table_find_target(struct dm_table *t, sector_t sector)
return &t->targets[(KEYS_PER_NODE * n) + k];
}
+/*
+ * 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)
{
/*
@@ -899,6 +938,7 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q)
else
queue_flag_set_unlocked(QUEUE_FLAG_CLUSTER, q);
+ dm_table_set_integrity(t);
}
unsigned int dm_table_get_num_targets(struct dm_table *t)