diff options
| -rw-r--r-- | fs/btrfs/zoned.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/fs/btrfs/zoned.c b/fs/btrfs/zoned.c index b60767492b3c..057babaa3e05 100644 --- a/fs/btrfs/zoned.c +++ b/fs/btrfs/zoned.c @@ -51,11 +51,13 @@ #define BTRFS_MIN_ACTIVE_ZONES (BTRFS_SUPER_MIRROR_MAX + 5) /* - * Maximum supported zone size. Currently, SMR disks have a zone size of - * 256MiB, and we are expecting ZNS drives to be in the 1-4GiB range. We do not - * expect the zone size to become larger than 8GiB in the near future. + * Minimum / maximum supported zone size. Currently, SMR disks have a zone + * size of 256MiB, and we are expecting ZNS drives to be in the 1-4GiB range. + * We do not expect the zone size to become larger than 8GiB or smaller than + * 4MiB in the near future. */ #define BTRFS_MAX_ZONE_SIZE SZ_8G +#define BTRFS_MIN_ZONE_SIZE SZ_4M #define SUPER_INFO_SECTORS ((u64)BTRFS_SUPER_INFO_SIZE >> SECTOR_SHIFT) @@ -402,6 +404,13 @@ int btrfs_get_dev_zone_info(struct btrfs_device *device, bool populate_cache) zone_info->zone_size, BTRFS_MAX_ZONE_SIZE); ret = -EINVAL; goto out; + } else if (zone_info->zone_size < BTRFS_MIN_ZONE_SIZE) { + btrfs_err_in_rcu(fs_info, + "zoned: %s: zone size %llu smaller than supported minimum %u", + rcu_str_deref(device->name), + zone_info->zone_size, BTRFS_MIN_ZONE_SIZE); + ret = -EINVAL; + goto out; } nr_sectors = bdev_nr_sectors(bdev); |