Improves the checks on the zones of a zoned block device done in
blk_revalidate_disk_zones() by making sure that the device report_zones
method did report at least one zone and that the zones reported exactly
cover the entire disk capacity, that is, that there are no missing zones
at the end of the disk sector range.
Signed-off-by: Damien Le Moal <damien.lemoal@xxxxxxx>
---
Changes from V1:
* Add checks on the number of zones reported
* Check the reported zone coverage only if zones are successfully
reported
* Reword the commit message
block/blk-zoned.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/block/blk-zoned.c b/block/blk-zoned.c
index 6817a673e5ce..7a68b6e4300c 100644
--- a/block/blk-zoned.c
+++ b/block/blk-zoned.c
@@ -508,15 +508,29 @@ int blk_revalidate_disk_zones(struct gendisk *disk,
noio_flag = memalloc_noio_save();
ret = disk->fops->report_zones(disk, 0, UINT_MAX,
blk_revalidate_zone_cb, &args);
+ if (!ret) {
+ pr_warn("%s: No zones reported\n", disk->disk_name);
+ ret = -ENODEV;
+ }
memalloc_noio_restore(noio_flag);
+ /*
+ * If zones where reported, make sure that the entire disk capacity
+ * has been checked.
+ */
+ if (ret > 0 && args.sector != get_capacity(disk)) {
+ pr_warn("%s: Missing zones from sector %llu\n",
+ disk->disk_name, args.sector);
+ ret = -ENODEV;
+ }
+
/*
* Install the new bitmaps and update nr_zones only once the queue is
* stopped and all I/Os are completed (i.e. a scheduler is not
* referencing the bitmaps).
*/
blk_mq_freeze_queue(q);
- if (ret >= 0) {
+ if (ret > 0) {
blk_queue_chunk_sectors(q, args.zone_sectors);
q->nr_zones = args.nr_zones;
swap(q->seq_zones_wlock, args.seq_zones_wlock);
--
2.26.2
