Add the block-backend accessors blk_get_zone_model(), blk_get_zone_capacity() and blk_get_max_open_zones(), which report the zoned model, the zone capacity and the maximum number of open zones of the backing device, mirroring the existing blk_get_zone_size(). This lets device models query the zoned geometry without dereferencing BlockDriverState internals.
Signed-off-by: Niklas Cassel <[email protected]> --- block/block-backend.c | 33 +++++++++++++++++++++++++++++++ include/system/block-backend-io.h | 3 +++ 2 files changed, 36 insertions(+) diff --git a/block/block-backend.c b/block/block-backend.c index 656c0aed67..397ec9ed5a 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -2338,6 +2338,39 @@ uint64_t blk_get_zone_size(BlockBackend *blk) return bs ? bs->bl.zone_size : 0; } +/* + * Returns the zoned model of @blk (BLK_Z_HM, BLK_Z_HA), or BLK_Z_NONE if + * @blk does not present zoned geometry. + */ +BlockZoneModel blk_get_zone_model(BlockBackend *blk) +{ + BlockDriverState *bs = blk_bs(blk); + IO_CODE(); + return bs ? bs->bl.zoned : BLK_Z_NONE; +} + +/* + * Returns the maximum number of simultaneously open zones for a zoned + * backend, or 0 if there is no limit or @blk is not zoned. + */ +uint32_t blk_get_max_open_zones(BlockBackend *blk) +{ + BlockDriverState *bs = blk_bs(blk); + IO_CODE(); + return bs ? bs->bl.max_open_zones : 0; +} + +/* + * Returns how many bytes of each zone of @blk can be written (the zone + * capacity), or 0 if that is not known. + */ +uint64_t blk_get_zone_capacity(BlockBackend *blk) +{ + BlockDriverState *bs = blk_bs(blk); + IO_CODE(); + return bs ? bs->bl.zone_capacity : 0; +} + /* Returns the optimal write zeroes alignment, in bytes; guaranteed nonzero */ uint32_t blk_get_pwrite_zeroes_alignment(BlockBackend *blk) { diff --git a/include/system/block-backend-io.h b/include/system/block-backend-io.h index 78d410b8df..7c958843b4 100644 --- a/include/system/block-backend-io.h +++ b/include/system/block-backend-io.h @@ -122,6 +122,9 @@ uint32_t blk_get_pwrite_zeroes_alignment(BlockBackend *blk); uint32_t blk_get_max_transfer(BlockBackend *blk); uint64_t blk_get_max_hw_transfer(BlockBackend *blk); uint64_t blk_get_zone_size(BlockBackend *blk); +BlockZoneModel blk_get_zone_model(BlockBackend *blk); +uint32_t blk_get_max_open_zones(BlockBackend *blk); +uint64_t blk_get_zone_capacity(BlockBackend *blk); int coroutine_fn blk_co_copy_range(BlockBackend *blk_in, int64_t off_in, BlockBackend *blk_out, int64_t off_out, -- 2.56.0
