[PATCH blktests 3/4] nvme/072: test nvmet zone report initialization and length

[Shin'ichiro Kawasaki]

On Oct 14, 2026 / 19:00, Andrea Parri wrote:
> Export a zoned null_blk device through the NVMe target and verify that
> Zone Management Receive zeroes reserved and unused report bytes and
> rejects a transfer length inconsistent with NUMD. The test runs on every
> configured transport, with RDMA restricted to 4 KiB page kernels so that
> the preparatory write exceeds the default inline-data limit. Add a small
> passthrough helper because nvme-cli does not expose the reserved report
> bytes.
> 
> The test fails on the unpatched kernel and passes with the fix applied.
> 
> Assisted-by: LLM
> Signed-off-by: Andrea Parri <parri.andrea at gmail.com>

[...]

> diff --git a/tests/nvme/072 b/tests/nvme/072
> new file mode 100755
> index 0000000000000..c7bcf93ab4d20
> --- /dev/null
> +++ b/tests/nvme/072
> @@ -0,0 +1,68 @@
> +#!/bin/bash
> +# SPDX-License-Identifier: GPL-3.0+
> +# Copyright (C) 2026 Andrea Parri
> +#
> +# Check that NVMe target zone reports are fully initialized and that their
> +# transfer length matches NUMD.
> +#
> +# Regression test for patch "nvmet: zns: don't leak stale memory in zone
> +# management receive".
> +
> +. tests/nvme/rc
> +. common/null_blk
> +
> +DESCRIPTION="check NVMe target zone report initialization and length"
> +QUICK=1
> +
> +requires() {
> +	_nvme_requires
> +	_have_loop
> +	_require_kernel_nvme_target
> +	_have_module null_blk

I suggest to call _have_null_blk instead of the line above. It will allow
built-in null_blk module.

> +	_have_kernel_options BLK_DEV_ZONED
> +	_have_src_program nvme-zone-report
> +
> +	# RDMA defaults to PAGE_SIZE bytes of inline data. The helper's
> +	# 8 KiB preparatory write must exceed that limit.
> +	if [[ "$nvme_trtype" == "rdma" ]]; then
> +		_page_size_equals 4096
> +	fi
> +}
> +
> +set_conditions() {
> +	_set_nvme_trtype "$@"
> +}
> +
> +test() {
> +	echo "Running ${TEST_NAME}"
> +
> +	local block_size dev last_sector ret sectors slba zone_sectors
> +
> +	_setup_nvmet
> +	_register_test_cleanup _cleanup_nvmet_zoned_target
> +	if ! _nvmet_zoned_target_setup; then
> +		return 1
> +	fi
> +	dev="/dev/$(_find_nvme_ns "$def_subsys_uuid")"
> +
> +	sectors=$(cat /sys/block/nullb0/size)
> +	zone_sectors=$(cat /sys/block/nullb0/queue/chunk_sectors)
> +	block_size=$(cat /sys/block/nullb0/queue/logical_block_size)

Again, I suggest s/nullb0/nullb1/

> +	last_sector=$(((sectors - 1) / zone_sectors * zone_sectors))
> +	slba=$((last_sector * 512 / block_size))
> +
> +	src/nvme-zone-report "$dev" "$slba" >>"$FULL" 2>&1
> +	ret=$?
> +	case $ret in
> +	0) ;;
> +	1) echo "zone report contained stale data" ;;
> +	*) echo "zone report checker failed" ;;
> +	esac
> +
> +	_check_zone_report "$dev" 4096 1023 0
> +	_check_zone_report "$dev" 8192 1023 15
> +
> +	_nvmet_zoned_target_cleanup
> +
> +	echo "Test complete"
> +}