dual-image: Mount alt dirs
To support dual image in static layout, it needs to mount secondary's
rofs/rwfs.
Update obmc-flash-bmc tool to support mounting 'alt-xxx' directories in
/run/media/alt-xxx, and try to mount the alt-rofs, alt-rwfs before
xyz.openbmc_project.Software.BMC.Updater.service starts.
The ExecStart command is prepended with `-` so that it does not matter
if the mount fails, because the alt chip may be empty or contain invalid
data.
Tested: Verify the obmc-flash-bmc-static-mount-alt.service starts before
xyz.openbmc_project.Software.BMC.Updater.service, and verify it
mounts alt-rofs for dual image systems.
The alt-rwfs will be mounted by the needed service in future
commits.
Signed-off-by: Lei YU <yulei.sh@bytedance.com>
Change-Id: I2133a99d5324a1008c3508154f865ae54a716219
diff --git a/static/obmc-flash-bmc-static-mount-alt.service.in b/static/obmc-flash-bmc-static-mount-alt.service.in
new file mode 100644
index 0000000..ba60f09
--- /dev/null
+++ b/static/obmc-flash-bmc-static-mount-alt.service.in
@@ -0,0 +1,15 @@
+[Unit]
+Description=Mount the alt partitions for static layout systems
+Wants=xyz.openbmc_project.Software.BMC.Updater.service
+Before=xyz.openbmc_project.Software.BMC.Updater.service
+
+[Service]
+Type=oneshot
+RemainAfterExit=no
+
+# The alt flash may be empty or contain invalid data so the mount could fail.
+# So prepend with `-` to ignore such failures
+ExecStart=-/usr/bin/obmc-flash-bmc static-altfs squashfs alt-rofs rofs-alt
+
+[Install]
+WantedBy=multi-user.target