summaryrefslogtreecommitdiffstats
path: root/block/blk-zoned.c
diff options
context:
space:
mode:
authorDamien Le Moal <dlemoal@kernel.org>2024-04-08 10:41:06 +0900
committerJens Axboe <axboe@kernel.dk>2024-04-17 08:44:02 -0600
commitecfe43b11b02ffeb24c203af7d3947417d412cf7 (patch)
treeab600b0095c8c5acdfc5212b65e82bf20704d492 /block/blk-zoned.c
parentdd850ff3eee428b4e1276bd51263dd937643ba19 (diff)
downloadlinux-ecfe43b11b02ffeb24c203af7d3947417d412cf7.tar.gz
linux-ecfe43b11b02ffeb24c203af7d3947417d412cf7.tar.bz2
linux-ecfe43b11b02ffeb24c203af7d3947417d412cf7.zip
block: Remember zone capacity when revalidating zones
In preparation for adding zone write plugging, modify blk_revalidate_disk_zones() to get the capacity of zones of a zoned block device. This capacity value as a number of 512B sectors is stored in the gendisk zone_capacity field. Given that host-managed SMR disks (including zoned UFS drives) and all known NVMe ZNS devices have the same zone capacity for all zones blk_revalidate_disk_zones() returns an error if different capacities are detected for different zones. This also adds check to verify that the values reported by the device for zone capacities are correct, that is, that the zone capacity is never 0, does not exceed the zone size and is equal to the zone size for conventional zones. Signed-off-by: Damien Le Moal <dlemoal@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Hans Holmberg <hans.holmberg@wdc.com> Tested-by: Dennis Maisenbacher <dennis.maisenbacher@wdc.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20240408014128.205141-7-dlemoal@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-zoned.c')
-rw-r--r--block/blk-zoned.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/block/blk-zoned.c b/block/blk-zoned.c
index da0f4b2a8fa0..23d9bb21c459 100644
--- a/block/blk-zoned.c
+++ b/block/blk-zoned.c
@@ -438,6 +438,7 @@ struct blk_revalidate_zone_args {
unsigned long *conv_zones_bitmap;
unsigned long *seq_zones_wlock;
unsigned int nr_zones;
+ unsigned int zone_capacity;
sector_t sector;
};
@@ -482,9 +483,20 @@ static int blk_revalidate_zone_cb(struct blk_zone *zone, unsigned int idx,
return -ENODEV;
}
+ if (!zone->capacity || zone->capacity > zone->len) {
+ pr_warn("%s: Invalid zone capacity\n",
+ disk->disk_name);
+ return -ENODEV;
+ }
+
/* Check zone type */
switch (zone->type) {
case BLK_ZONE_TYPE_CONVENTIONAL:
+ if (zone->capacity != zone->len) {
+ pr_warn("%s: Invalid conventional zone capacity\n",
+ disk->disk_name);
+ return -ENODEV;
+ }
if (!args->conv_zones_bitmap) {
args->conv_zones_bitmap =
blk_alloc_zone_bitmap(q->node, args->nr_zones);
@@ -500,6 +512,18 @@ static int blk_revalidate_zone_cb(struct blk_zone *zone, unsigned int idx,
if (!args->seq_zones_wlock)
return -ENOMEM;
}
+
+ /*
+ * Remember the capacity of the first sequential zone and check
+ * if it is constant for all zones.
+ */
+ if (!args->zone_capacity)
+ args->zone_capacity = zone->capacity;
+ if (zone->capacity != args->zone_capacity) {
+ pr_warn("%s: Invalid variable zone capacity\n",
+ disk->disk_name);
+ return -ENODEV;
+ }
break;
case BLK_ZONE_TYPE_SEQWRITE_PREF:
default:
@@ -595,6 +619,7 @@ int blk_revalidate_disk_zones(struct gendisk *disk,
blk_mq_freeze_queue(q);
if (ret > 0) {
disk->nr_zones = args.nr_zones;
+ disk->zone_capacity = args.zone_capacity;
swap(disk->seq_zones_wlock, args.seq_zones_wlock);
swap(disk->conv_zones_bitmap, args.conv_zones_bitmap);
if (update_driver_data)
@@ -608,6 +633,7 @@ int blk_revalidate_disk_zones(struct gendisk *disk,
kfree(args.seq_zones_wlock);
kfree(args.conv_zones_bitmap);
+
return ret;
}
EXPORT_SYMBOL_GPL(blk_revalidate_disk_zones);