[PATCHv3 blktests] nvme/{033-037}: timeout while waiting for nvme passthru namespace device

[Nilay Shroff <nilay@linux.ibm.com>]

Avoid waiting indefinitely for nvme passthru namespace block device
to appear. Wait for up to 5 seconds and during this time if namespace
device doesn't appear then bail out and FAIL the test.

Signed-off-by: Nilay Shroff <nilay@linux.ibm.com>
---
    Changes from v2:
        - Add nsdev check back into nvme/036 (Shnichiro Kawasaki)
    Changes from v1:
        - Add a meaningful error message if test fails (Shnichiro
          Kawasaki)
        - Use sleep "1" instead of ".1" while waiting for nsdev to be
          created as we don't see much gain in test runtime with short 
          duration of sleep. This would also help further optimize
          the sleep logic (Shnichiro Kawasaki)
        - Few other trivial cleanups (Shnichiro Kawasaki)	           	
---
 tests/nvme/033 |  7 +++++--
 tests/nvme/034 |  8 +++++---
 tests/nvme/035 |  6 +++---
 tests/nvme/036 | 11 ++++++++---
 tests/nvme/037 |  7 ++++++-
 tests/nvme/rc  |  9 ++++++++-
 6 files changed, 35 insertions(+), 13 deletions(-)

diff --git a/tests/nvme/033 b/tests/nvme/033
index 5e05175..d0581c2 100755
--- a/tests/nvme/033
+++ b/tests/nvme/033
@@ -62,8 +62,11 @@ test_device() {
 	_nvmet_passthru_target_setup
 
 	nsdev=$(_nvmet_passthru_target_connect)
-
-	compare_dev_info "${nsdev}"
+	if [[ -z "$nsdev" ]]; then
+		echo "FAIL: Failed to find passthru target namespace"
+	else
+		compare_dev_info "${nsdev}"
+	fi
 
 	_nvme_disconnect_subsys
 	_nvmet_passthru_target_cleanup
diff --git a/tests/nvme/034 b/tests/nvme/034
index 154fc91..a4c5e97 100755
--- a/tests/nvme/034
+++ b/tests/nvme/034
@@ -27,13 +27,15 @@ test_device() {
 
 	_setup_nvmet
 
-	local ctrldev
 	local nsdev
 
 	_nvmet_passthru_target_setup
 	nsdev=$(_nvmet_passthru_target_connect)
-
-	_run_fio_verify_io --size="${NVME_IMG_SIZE}" --filename="${nsdev}"
+	if [[ -z "$nsdev" ]]; then
+		echo "FAIL: Failed to find passthru target namespace"
+	else
+		_run_fio_verify_io --size="${NVME_IMG_SIZE}" --filename="${nsdev}"
+	fi
 
 	_nvme_disconnect_subsys
 	_nvmet_passthru_target_cleanup
diff --git a/tests/nvme/035 b/tests/nvme/035
index ff217d6..9f84ced 100755
--- a/tests/nvme/035
+++ b/tests/nvme/035
@@ -30,13 +30,13 @@ test_device() {
 
 	_setup_nvmet
 
-	local ctrldev
 	local nsdev
 
 	_nvmet_passthru_target_setup
 	nsdev=$(_nvmet_passthru_target_connect)
-
-	if ! _xfs_run_fio_verify_io "${nsdev}" "${NVME_IMG_SIZE}"; then
+	if [[ -z "$nsdev" ]]; then
+		echo "FAIL: Failed to find passthru target namespace"
+	elif ! _xfs_run_fio_verify_io "${nsdev}" "${NVME_IMG_SIZE}"; then
 		echo "FAIL: fio verify failed"
 	fi
 
diff --git a/tests/nvme/036 b/tests/nvme/036
index 442ffe7..11cd5c1 100755
--- a/tests/nvme/036
+++ b/tests/nvme/036
@@ -27,14 +27,19 @@ test_device() {
 	_setup_nvmet
 
 	local ctrldev
+	local nsdev
 
 	_nvmet_passthru_target_setup
 	nsdev=$(_nvmet_passthru_target_connect)
 
-	ctrldev=$(_find_nvme_dev "${def_subsysnqn}")
+	if [[ -z "$nsdev" ]]; then
+		echo "FAIL: Failed to find passthru target namespace"
+	else
+		ctrldev=$(_find_nvme_dev "${def_subsysnqn}")
 
-	if ! nvme reset "/dev/${ctrldev}" >> "$FULL" 2>&1; then
-		echo "ERROR: reset failed"
+		if ! nvme reset "/dev/${ctrldev}" >> "$FULL" 2>&1; then
+			echo "ERROR: reset failed"
+		fi
 	fi
 
 	_nvme_disconnect_subsys
diff --git a/tests/nvme/037 b/tests/nvme/037
index f7ddc2d..33a6857 100755
--- a/tests/nvme/037
+++ b/tests/nvme/037
@@ -27,7 +27,7 @@ test_device() {
 
 	local subsys="blktests-subsystem-"
 	local iterations=10
-	local ctrldev
+	local nsdev
 
 	for ((i = 0; i < iterations; i++)); do
 		_nvmet_passthru_target_setup --subsysnqn "${subsys}${i}"
@@ -37,6 +37,11 @@ test_device() {
 		_nvme_disconnect_subsys \
 			--subsysnqn "${subsys}${i}" >>"${FULL}" 2>&1
 		_nvmet_passthru_target_cleanup --subsysnqn "${subsys}${i}"
+
+		if [[ -z "$nsdev" ]]; then
+			echo "FAIL: Failed to find passthru target namespace"
+			break
+		fi
 	done
 
 	echo "Test complete"
diff --git a/tests/nvme/rc b/tests/nvme/rc
index a877de3..671012e 100644
--- a/tests/nvme/rc
+++ b/tests/nvme/rc
@@ -394,6 +394,8 @@ _nvmet_passthru_target_setup() {
 
 _nvmet_passthru_target_connect() {
 	local subsysnqn="$def_subsysnqn"
+	local timeout="5"
+	local count="0"
 
 	while [[ $# -gt 0 ]]; do
 		case $1 in
@@ -414,7 +416,12 @@ _nvmet_passthru_target_connect() {
 	# The following tests can race with the creation
 	# of the device so ensure the block device exists
 	# before continuing
-	while [ ! -b "${nsdev}" ]; do sleep 1; done
+	while [ ! -b "${nsdev}" ]; do
+		sleep 1
+		if ((++count >= timeout)); then
+			return 1
+		fi
+	done
 
 	echo "${nsdev}"
 }
-- 
2.45.2