dm_revalidate_zones() is called from dm_set_zone_restrictions() when the
mapped device queue limits are not yet set. However,
dm_revalidate_zones() calls blk_revalidate_disk_zones() and this
function consults and modifies the mapped device queue limits. Thus,
currently, blk_revalidate_disk_zones() operates on limits that are not
yet initialized.
Fix this by moving the call to dm_revalidate_zones() out of
dm_set_zone_restrictions() and into dm_table_set_restrictions() after
executing queue_limits_set().
To further cleanup dm_set_zones_restrictions(), the message about the
type of zone append (native or emulated) is also moved inside
dm_revalidate_zones().
Fixes: 1c0e720228ad ("dm: use queue_limits_set")
Signed-off-by: Damien Le Moal <dlemoal@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Benjamin Marzinski <bmarzins@xxxxxxxxxx>
Reviewed-by: Niklas Cassel <cassel@xxxxxxxxxx>
---
drivers/md/dm-table.c | 15 +++++++++++----
drivers/md/dm-zone.c | 25 ++++++++++---------------
drivers/md/dm.h | 1 +
3 files changed, 22 insertions(+), 19 deletions(-)
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index b2d5246cff21..2fc847af254d 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -2028,10 +2028,7 @@ int dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
dm_table_any_dev_attr(t, device_is_not_random, NULL))
blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q);
- /*
- * For a zoned target, setup the zones related queue attributes
- * and resources necessary for zone append emulation if necessary.
- */
+ /* For a zoned table, setup the zone related queue attributes. */
if (IS_ENABLED(CONFIG_BLK_DEV_ZONED) && limits->zoned) {
r = dm_set_zones_restrictions(t, q, limits);
if (r)
@@ -2042,6 +2039,16 @@ int dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
if (r)
return r;
+ /*
+ * Now that the limits are set, check the zones mapped by the table
+ * and setup the resources for zone append emulation if necessary.
+ */
+ if (IS_ENABLED(CONFIG_BLK_DEV_ZONED) && limits->zoned) {
+ r = dm_revalidate_zones(t, q);
+ if (r)
+ return r;
+ }
+
dm_update_crypto_profile(q, t);
/*
diff --git a/drivers/md/dm-zone.c b/drivers/md/dm-zone.c
index 5d66d916730e..75d0019a0649 100644
--- a/drivers/md/dm-zone.c
+++ b/drivers/md/dm-zone.c
@@ -166,14 +166,22 @@ static int dm_check_zoned_cb(struct blk_zone *zone, unsigned int idx,
* blk_revalidate_disk_zones() function here as the mapped device is suspended
* (this is called from __bind() context).
*/
-static int dm_revalidate_zones(struct mapped_device *md, struct dm_table *t)
+int dm_revalidate_zones(struct dm_table *t, struct request_queue *q)
{
+ struct mapped_device *md = t->md;
struct gendisk *disk = md->disk;
int ret;
+ if (!get_capacity(disk))
+ return 0;
+
/* Revalidate only if something changed. */
- if (!disk->nr_zones || disk->nr_zones != md->nr_zones)
+ if (!disk->nr_zones || disk->nr_zones != md->nr_zones) {
+ DMINFO("%s using %s zone append",
+ disk->disk_name,
+ queue_emulates_zone_append(q) ? "emulated" : "native");
md->nr_zones = 0;
+ }
if (md->nr_zones)
return 0;
@@ -240,9 +248,6 @@ int dm_set_zones_restrictions(struct dm_table *t, struct request_queue *q,
lim->max_zone_append_sectors = 0;
}
- if (!get_capacity(md->disk))
- return 0;
-
/*
* Count conventional zones to check that the mapped device will indeed
* have sequential write required zones.
@@ -269,16 +274,6 @@ int dm_set_zones_restrictions(struct dm_table *t, struct request_queue *q,
return 0;
}
- if (!md->disk->nr_zones) {
- DMINFO("%s using %s zone append",
- md->disk->disk_name,
- queue_emulates_zone_append(q) ? "emulated" : "native");
- }
-
- ret = dm_revalidate_zones(md, t);
- if (ret < 0)
- return ret;
-
if (!static_key_enabled(&zoned_enabled.key))
static_branch_enable(&zoned_enabled);
return 0;
diff --git a/drivers/md/dm.h b/drivers/md/dm.h
index 53ef8207fe2c..c984ecb64b1e 100644
--- a/drivers/md/dm.h
+++ b/drivers/md/dm.h
@@ -103,6 +103,7 @@ int dm_setup_md_queue(struct mapped_device *md, struct dm_table *t);
*/
int dm_set_zones_restrictions(struct dm_table *t, struct request_queue *q,
struct queue_limits *lim);
+int dm_revalidate_zones(struct dm_table *t, struct request_queue *q);
void dm_zone_endio(struct dm_io *io, struct bio *clone);
#ifdef CONFIG_BLK_DEV_ZONED
int dm_blk_report_zones(struct gendisk *disk, sector_t sector,
--
2.45.2
