test/dd: Simple tests utilizing uring RPCs

Signed-off-by: Michal Berger <michalx.berger@intel.com>
Change-Id: If9c5d0071d30b3a5ac40ea5085dbf564b98cb667
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/9947
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Konrad Sztyber <konrad.sztyber@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>

test/dd/common.sh

@@ -159,3 +159,30 @@ check_liburing() {
 		fi
 	done < <(LD_TRACE_LOADED_OBJECTS=1 "${DD_APP[@]}") >&2
 }
+
+init_zram() {
+	[[ -e /sys/class/zram-control ]] || modprobe zram num_devices=0
+	return
+}
+
+create_zram_dev() {
+	cat /sys/class/zram-control/hot_add
+}
+
+remove_zram_dev() {
+	local id=$1
+
+	[[ -e /sys/block/zram$id ]]
+
+	echo 1 > "/sys/block/zram$id/reset"
+	echo "$id" > "/sys/class/zram-control/hot_remove"
+}
+
+set_zram_dev() {
+	local id=$1
+	local size=${2:-64M}
+
+	[[ -e /sys/block/zram$id ]]
+
+	echo "$size" > "/sys/block/zram$id/disksize"
+}

test/dd/dd.sh

@@ -17,3 +17,6 @@ run_test "spdk_dd_basic_rw" "$testdir/basic_rw.sh" "${nvmes[@]}"
 run_test "spdk_dd_posix" "$testdir/posix.sh"
 run_test "spdk_dd_malloc" "$testdir/malloc.sh"
 run_test "spdk_dd_bdev_to_bdev" "$testdir/bdev_to_bdev.sh" "${nvmes[@]}"
+if ((SPDK_TEST_URING == 1)); then
+	run_test "spdk_dd_uring" "$testdir/uring.sh"
+fi

test/dd/uring.sh

@@ -0,0 +1,98 @@
+#!/usr/bin/env bash
+testdir=$(readlink -f "$(dirname "$0")")
+rootdir=$(readlink -f "$testdir/../../")
+source "$testdir/common.sh"
+
+uring_zram_copy() {
+	# Use zram for backend device - this is done in order to make the IO as fast
+	# as possible.
+
+	local zram_dev_id
+	local magic
+	local magic_file0=$SPDK_TEST_STORAGE/magic.dump0
+	local magic_file1=$SPDK_TEST_STORAGE/magic.dump1
+	local verify_magic
+
+	init_zram
+	zram_dev_id=$(create_zram_dev)
+	set_zram_dev "$zram_dev_id" 512M
+
+	local ubdev=uring0 ufile=/dev/zram$zram_dev_id
+
+	local -A method_bdev_uring_create_0=(
+		["filename"]=$ufile
+		["name"]=$ubdev
+	)
+
+	# Add extra malloc bdev
+	local mbdev=malloc0 mbdev_b=1048576 mbdev_bs=512
+
+	local -A method_bdev_malloc_create_0=(
+		["name"]=$mbdev
+		["num_blocks"]=$mbdev_b
+		["block_size"]=$mbdev_bs
+	)
+
+	magic=$(gen_bytes $((mbdev_bs * 2)))
+	echo "$magic" > "$magic_file0"
+
+	# Inflate the magic file to fill up entire zram of 512MB.
+	"${DD_APP[@]}" \
+		--if=/dev/zero \
+		--of="$magic_file0" \
+		--oflag=append \
+		--bs=$((mbdev_b * mbdev_bs - ${#magic} - 1)) \
+		--count=1
+
+	# Copy magic file to uring bdev
+	"${DD_APP[@]}" \
+		--if="$magic_file0" \
+		--ob="$ubdev" \
+		--json <(gen_conf)
+
+	# Copy the whole uring bdev back to a file
+	"${DD_APP[@]}" \
+		--ib="$ubdev" \
+		--of="$magic_file1" \
+		--json <(gen_conf)
+
+	# Verify integrity of each copy
+	read -rn${#magic} verify_magic < "$magic_file1"
+	[[ $verify_magic == "$magic" ]]
+
+	read -rn${#magic} verify_magic < "/dev/zram$zram_dev_id"
+	[[ $verify_magic == "$magic" ]]
+
+	diff -q "$magic_file0" "$magic_file1"
+
+	# Copy cotents of uring bdev to malloc bdev
+	"${DD_APP[@]}" \
+		--ib="$ubdev" \
+		--ob="$mbdev" \
+		--json <(gen_conf)
+
+	# HACK: small trick to utilize bdev_uring_delete and keep spdk_dd happy -
+	# read/write from 0-length files.
+
+	local -A method_bdev_uring_delete_0=(
+		["name"]="$ubdev"
+	)
+
+	"${DD_APP[@]}" \
+		--if=<(:) \
+		--of=<(:) \
+		--json <(gen_conf)
+
+	# Now try to copy to uring bdev which is explicitly deleted. We expect it
+	# to fail.
+
+	NOT "${DD_APP[@]}" \
+		--ib="$ubdev" \
+		--of=<(:) \
+		--json <(gen_conf)
+
+	remove_zram_dev "$zram_dev_id"
+	rm -f "$magic_file0" "$magic_file1"
+}
+
+run_test "dd_uring_copy" uring_zram_copy