Lift the code from device mapper into blk_stack_limits to inherity
the stacking limitations. This ensures we do the right thing for
all stacked zoned block devices.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
block/blk-settings.c | 1 +
drivers/md/dm-table.c | 19 -------------------
include/linux/blkdev.h | 9 ++++++---
3 files changed, 7 insertions(+), 22 deletions(-)
diff --git a/block/blk-settings.c b/block/blk-settings.c
index 9a2c23cd970073..9cddbd73647405 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -609,6 +609,7 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
t->chunk_sectors = min_not_zero(t->chunk_sectors,
b->chunk_sectors);
+ t->zoned = max(t->zoned, b->zoned);
return ret;
}
EXPORT_SYMBOL(blk_stack_limits);
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 0ea5b7367179ff..ec5364133cef7f 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -467,9 +467,6 @@ static int dm_set_device_limits(struct dm_target *ti, struct dm_dev *dev,
q->limits.logical_block_size,
q->limits.alignment_offset,
(unsigned long long) start << SECTOR_SHIFT);
-
- limits->zoned = blk_queue_zoned_model(q);
-
return 0;
}
@@ -1528,22 +1525,6 @@ int dm_calculate_queue_limits(struct dm_table *table,
dm_device_name(table->md),
(unsigned long long) ti->begin,
(unsigned long long) ti->len);
-
- /*
- * FIXME: this should likely be moved to blk_stack_limits(), would
- * also eliminate limits->zoned stacking hack in dm_set_device_limits()
- */
- if (limits->zoned == BLK_ZONED_NONE && ti_limits.zoned != BLK_ZONED_NONE) {
- /*
- * By default, the stacked limits zoned model is set to
- * BLK_ZONED_NONE in blk_set_stacking_limits(). Update
- * this model using the first target model reported
- * that is not BLK_ZONED_NONE. This will be either the
- * first target device zoned model or the model reported
- * by the target .io_hints.
- */
- limits->zoned = ti_limits.zoned;
- }
}
/*
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 06995b96e94679..67b9ccc1da3560 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -306,11 +306,14 @@ enum blk_queue_state {
/*
* Zoned block device models (zoned limit).
+ *
+ * Note: This needs to be ordered from the least to the most severe
+ * restrictions for the inheritance in blk_stack_limits() to work.
*/
enum blk_zoned_model {
- BLK_ZONED_NONE, /* Regular block device */
- BLK_ZONED_HA, /* Host-aware zoned block device */
- BLK_ZONED_HM, /* Host-managed zoned block device */
+ BLK_ZONED_NONE = 0, /* Regular block device */
+ BLK_ZONED_HA, /* Host-aware zoned block device */
+ BLK_ZONED_HM, /* Host-managed zoned block device */
};
struct queue_limits {
--
2.27.0
