From: Zhang Yi <yi.zhang@xxxxxxxxxx> Set WZDS and DRB bit to the namespace dlfeat if the underlying block device supports BLK_FEAT_WRITE_ZEROES_UNMAP, make the nvme target device supports unmaped write zeroes command. Signed-off-by: Zhang Yi <yi.zhang@xxxxxxxxxx> Reviewed-by: Christoph Hellwig <hch@xxxxxx> --- drivers/nvme/target/io-cmd-bdev.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/nvme/target/io-cmd-bdev.c b/drivers/nvme/target/io-cmd-bdev.c index 83be0657e6df..052da6174548 100644 --- a/drivers/nvme/target/io-cmd-bdev.c +++ b/drivers/nvme/target/io-cmd-bdev.c @@ -46,6 +46,10 @@ void nvmet_bdev_set_limits(struct block_device *bdev, struct nvme_id_ns *id) id->npda = id->npdg; /* NOWS = Namespace Optimal Write Size */ id->nows = to0based(bdev_io_opt(bdev) / bdev_logical_block_size(bdev)); + + /* Set WZDS and DRB if device supports unmapped write zeroes */ + if (bdev_write_zeroes_unmap(bdev)) + id->dlfeat = (1 << 3) | 0x1; } void nvmet_bdev_ns_disable(struct nvmet_ns *ns) -- 2.46.1
