nvme: Add common helpers for passthru tests

Add some simple helpers to setup a passthru target that passes through
to a nvme test device.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>

diff --git a/tests/nvme/rc b/tests/nvme/rc
index dfa57a2996251da06f0dc3e8a9deb52c86ba9e24..1c27cdee1b5f7318213a6fc480ba74d6fdcb0990 100644 (file)
--- a/tests/nvme/rc
+++ b/tests/nvme/rc
@@ -73,6 +73,14 @@ _require_nvme_trtype_is_fabrics() {
        return 0
 }
 
+_test_dev_nvme_ctrl() {
+       echo "/dev/char/$(cat "${TEST_DEV_SYSFS}/device/dev")"
+}
+
+_test_dev_nvme_nsid() {
+       cat "${TEST_DEV_SYSFS}/nsid"
+}
+
 _cleanup_nvmet() {
        local dev
        local port
@@ -257,6 +265,27 @@ _remove_nvmet_subsystem() {
        rmdir "${subsys_path}"
 }
 
+_create_nvmet_passthru() {
+       local nvmet_subsystem="$1"
+       local subsys_path="${NVMET_CFS}/subsystems/${nvmet_subsystem}"
+       local passthru_path="${subsys_path}/passthru"
+
+       mkdir -p "${subsys_path}"
+       echo 1 > "${subsys_path}/attr_allow_any_host"
+
+       _test_dev_nvme_ctrl > "${passthru_path}/device_path"
+       echo 1 > "${passthru_path}/enable"
+}
+
+_remove_nvmet_passhtru() {
+       local nvmet_subsystem="$1"
+       local subsys_path="${NVMET_CFS}/subsystems/${nvmet_subsystem}"
+       local passthru_path="${subsys_path}/passthru"
+
+       echo 0 > "${passthru_path}/enable"
+       rmdir "${subsys_path}"
+}
+
 _add_nvmet_subsys_to_port() {
        local port="$1"
        local nvmet_subsystem="$2"
@@ -292,6 +321,50 @@ _find_nvme_dev() {
        done
 }
 
+_find_nvme_passthru_loop_dev() {
+       local subsys=$1
+       local nsid
+       local dev
+
+       dev=$(_find_nvme_dev "${subsys}")
+       nsid=$(_test_dev_nvme_nsid)
+       echo "/dev/${dev}n${nsid}"
+}
+
+_nvmet_passthru_target_setup() {
+       local subsys_name=$1
+
+       _create_nvmet_passthru "${subsys_name}"
+       port="$(_create_nvmet_port "loop")"
+       _add_nvmet_subsys_to_port "${port}" "${subsys_name}"
+
+       echo "$port"
+}
+
+_nvmet_passthru_target_connect() {
+       local trtype=$1
+       local subsys_name=$2
+
+       _nvme_connect_subsys "${trtype}" "${subsys_name}"
+       nsdev=$(_find_nvme_passthru_loop_dev "${subsys_name}")
+
+       # The following tests can race with the creation
+       # of the device so ensure the block device exists
+       # before continuing
+       while [ ! -b "${nsdev}" ]; do sleep 1; done
+
+       echo "${nsdev}"
+}
+
+_nvmet_passthru_target_cleanup() {
+       local port=$1
+       local subsys_name=$2
+
+       _remove_nvmet_subsystem_from_port "${port}" "${subsys_name}"
+       _remove_nvmet_port "${port}"
+       _remove_nvmet_passhtru "${subsys_name}"
+}
+
 _filter_discovery() {
        sed -n -r -e "s/Generation counter [0-9]+/Generation counter X/" \
                  -e '/Discovery Log Number|Log Entry|trtype|subnqn/p'