Since blk_stack_limits() does not change the zoned model type, in
dm_calculate_queue_limits(), make sure to report the correct stacked
limits by setting the zoned model to the model of the underlying table
device, after eventual override by the target .io_hints. This allows
removing the local variables zoned_model and zone_sectors and to
simplify validate_hardware_zoned_model() interface.
Signed-off-by: Damien Le Moal <damien.lemoal@xxxxxxx>
---
drivers/md/dm-table.c | 46 +++++++++++++++++++---------------------------
1 file changed, 19 insertions(+), 27 deletions(-)
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 6545150..9ba58d3 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -1438,16 +1438,17 @@ static bool dm_table_matches_zone_sectors(struct dm_table *t,
}
static int validate_hardware_zoned_model(struct dm_table *table,
- enum blk_zoned_model zoned_model,
- unsigned int zone_sectors)
+ struct queue_limits *limits)
{
- if (!dm_table_supports_zoned_model(table, zoned_model)) {
+ if (!dm_table_supports_zoned_model(table, limits->zoned)) {
DMERR("%s: zoned model is inconsistent across all devices",
dm_device_name(table->md));
return -EINVAL;
}
- if (zoned_model != BLK_ZONED_NONE) {
+ if (limits->zoned != BLK_ZONED_NONE) {
+ unsigned int zone_sectors = limits->chunk_sectors;
+
/* Check zone size validity and compatibility */
if (!zone_sectors || !is_power_of_2(zone_sectors))
return -EINVAL;
@@ -1471,8 +1472,6 @@ int dm_calculate_queue_limits(struct dm_table *table,
struct dm_target *ti;
struct queue_limits ti_limits;
unsigned i;
- enum blk_zoned_model zoned_model = BLK_ZONED_NONE;
- unsigned int zone_sectors = 0;
blk_set_stacking_limits(limits);
@@ -1490,15 +1489,6 @@ int dm_calculate_queue_limits(struct dm_table *table,
ti->type->iterate_devices(ti, dm_set_device_limits,
&ti_limits);
- if (zoned_model == BLK_ZONED_NONE && ti_limits.zoned != BLK_ZONED_NONE) {
- /*
- * After stacking all limits, validate all devices
- * in table support this zoned model and zone sectors.
- */
- zoned_model = ti_limits.zoned;
- zone_sectors = ti_limits.chunk_sectors;
- }
-
/* Set I/O hints portion of queue limits */
if (ti->type->io_hints)
ti->type->io_hints(ti, &ti_limits);
@@ -1523,20 +1513,22 @@ int dm_calculate_queue_limits(struct dm_table *table,
dm_device_name(table->md),
(unsigned long long) ti->begin,
(unsigned long long) ti->len);
+
+ 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;
+ }
}
- /*
- * Verify that the zoned model and zone sectors, as determined before
- * any .io_hints override, are the same across all devices in the table.
- * - but if limits->zoned is not BLK_ZONED_NONE validate match for it
- * - simillarly, check all devices conform to limits->chunk_sectors if
- * .io_hints altered them
- */
- if (limits->zoned != BLK_ZONED_NONE)
- zoned_model = limits->zoned;
- if (limits->chunk_sectors != zone_sectors)
- zone_sectors = limits->chunk_sectors;
- if (validate_hardware_zoned_model(table, zoned_model, zone_sectors))
+ if (validate_hardware_zoned_model(table, limits))
return -EINVAL;
return validate_hardware_logical_block_alignment(table, limits);
--
2.9.4
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