meta-openpower: Set unique BMC hostname

To prevent hostnames conflicts this service appends to the default
hostname a Serial Number retrieved from Inventory Manager.

This operation is executed only at the first boot or after a factory reset.
This will be skipped if hostname is manually configured to a non default
value.

(From meta-openpower rev: 55281dffb43c4c59a5fce24727627fa3de1498fe)

Change-Id: I9c3aa7c19cf595a599baab71b2af49defb4b8c76
Signed-off-by: Alexander Filippov <a.filippov@yadro.com>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>

3 files changed, 81 insertions, 0 deletions

diff --git a/meta-openpower/recipes-phosphor/network/first-boot-set-hostname/first-boot-set-hostname.service b/meta-openpower/recipes-phosphor/network/first-boot-set-hostname/first-boot-set-hostname.service
new file mode 100644
index 000000000..ce59b3377
--- /dev/null
+++ b/meta-openpower/recipes-phosphor/network/first-boot-set-hostname/first-boot-set-hostname.service
@@ -0,0 +1,13 @@
+[Unit]
+Description=Init BMC Hostname
+Wants=mapper-wait@-xyz-openbmc_project-inventory.service
+After=mapper-wait@-xyz-openbmc_project-inventory.service
+
+[Service]
+ExecStart=/usr/bin/first-boot-set-hostname.sh
+Type=oneshot
+RemainAfterExit=Yes
+
+[Install]
+WantedBy=multi-user.target
+
diff --git a/meta-openpower/recipes-phosphor/network/first-boot-set-hostname/first-boot-set-hostname.sh b/meta-openpower/recipes-phosphor/network/first-boot-set-hostname/first-boot-set-hostname.sh
new file mode 100644
index 000000000..541523760
--- /dev/null
+++ b/meta-openpower/recipes-phosphor/network/first-boot-set-hostname/first-boot-set-hostname.sh
@@ -0,0 +1,46 @@
+#!/bin/sh -eu
+
+show_error() {
+    echo "$@" >&2
+}
+
+sync_hostname() {
+    MAPPER_IFACE='xyz.openbmc_project.ObjectMapper'
+    MAPPER_PATH='/xyz/openbmc_project/object_mapper'
+    INVENTORY_PATH='/xyz/openbmc_project/inventory'
+    BMC_ITEM_IFACE='xyz.openbmc_project.Inventory.Item.Bmc'
+
+    BMC_ITEM_PATH=$(busctl --no-pager --verbose call \
+                            ${MAPPER_IFACE} \
+                            ${MAPPER_PATH} \
+                            ${MAPPER_IFACE} \
+                            GetSubTree sias \
+                            ${INVENTORY_PATH} 0 1 ${BMC_ITEM_IFACE} \
+                        2>/dev/null | grep ${INVENTORY_PATH} || true)
+
+    # '     STRING "/xyz/openbmc_project/inventory/system/chassis/bmc";'
+    BMC_ITEM_PATH=${BMC_ITEM_PATH#*\"}
+    BMC_ITEM_PATH=${BMC_ITEM_PATH%\"*}
+
+    BMC_ITEM_SERVICE=$(mapper get-service \
+                                ${BMC_ITEM_PATH} 2>/dev/null || true)
+
+    if [[ -z "${BMC_ITEM_SERVICE}" ]]; then
+        echo "No BMC item found in the Inventory. Is VPD EEPROM empty?" >&2
+        return
+    fi
+
+    BMC_SN=$(busctl get-property ${BMC_ITEM_SERVICE} \
+                            ${BMC_ITEM_PATH} \
+                            ${BMC_ITEM_IFACE} SerialNumber)
+    # 's "002B0DH1000"'
+    BMC_SN=${BMC_SN#*\"}
+    BMC_SN=${BMC_SN%\"*}
+
+    hostnamectl set-hostname {MACHINE}-${BMC_SN}
+}
+
+[ "$(hostname)" = "{MACHINE}" ] && sync_hostname
+
+systemctl disable first-boot-set-hostname.service
+
diff --git a/meta-openpower/recipes-phosphor/network/first-boot-set-hostname_1.0.bb b/meta-openpower/recipes-phosphor/network/first-boot-set-hostname_1.0.bb
new file mode 100644
index 000000000..1e9fdd66f
--- /dev/null
+++ b/meta-openpower/recipes-phosphor/network/first-boot-set-hostname_1.0.bb
@@ -0,0 +1,22 @@
+SUMMARY = "Init BMC Hostname"
+DESCRIPTION = "Setup BMC Unique hostname"
+PR = "r1"
+LICENSE = "Apache-2.0"
+LIC_FILES_CHKSUM = "file://${OPENPOWERBASE}/COPYING.apache-2.0;md5=34400b68072d710fecd0a2940a0d1658"
+
+inherit allarch systemd
+
+RDEPENDS_${PN} = "${VIRTUAL-RUNTIME_base-utils}"
+
+SYSTEMD_SERVICE_${PN} = "first-boot-set-hostname.service"
+
+SRC_URI = "file://${PN}.sh file://${PN}.service"
+
+S = "${WORKDIR}"
+do_install() {
+    sed "s/{MACHINE}/${MACHINE}/" -i ${PN}.sh
+    install -d ${D}${bindir} ${D}${systemd_system_unitdir}
+    install ${PN}.sh ${D}${bindir}/
+    install -m 644 ${PN}.service ${D}${systemd_system_unitdir}/
+}
+