test: Verify master loading legacy metadata

tests/test_suites/ShortSystemTests/test_metadata_load_legacy.sh

@@ -0,0 +1,77 @@
+timeout_set 30 seconds
+master_cfg+="MAGIC_DEBUG_LOG = $TEMP_DIR/syslog|LOG_FLUSH_ON=DEBUG"
+touch "$TEMP_DIR/syslog"
+
+CHUNKSERVERS=0 \
+	MASTERSERVERS=2 \
+	USE_RAMDISK="YES" \
+	MASTER_EXTRA_CONFIG="${master_cfg}" \
+	MOUNT_EXTRA_CONFIG="sfscachemode=NEVER" \
+	AUTO_SHADOW_MASTER="YES" \
+	setup_local_empty_saunafs info
+
+metadata_file="${info[master0_data_path]}/metadata.sfs"
+
+ACTUAL_HEADER_TAG="SFSM 2.9"
+ACTUAL_TRAILER_TAG="[SFS EOF MARKER]"
+LEGACY_HEADER_TAG="LIZM 2.9"
+LEGACY_TRAILER_TAG="[MFS EOF MARKER]"
+
+# Add metalogger service to the configuration
+saunafs_metalogger_daemon start
+
+# Access mountpoint to create metadata
+cd "${info[mount0]}"
+for i in {1..100}; do
+	touch file$i
+	mkdir dir$i
+done
+
+# Exit mount point and save metadata by stopping master server
+cd "${TEMP_DIR}"
+assert_success saunafs_master_n 0 stop
+assert_success saunafs_master_n 1 stop
+
+# Expected Values
+assert_equals "$(head -c8 ${metadata_file})" "${ACTUAL_HEADER_TAG}"
+assert_equals "$(tail -c16 ${metadata_file})" "${ACTUAL_TRAILER_TAG}"
+
+# Modify metadata signature for legacy and reload metadata by starting master
+echo -n "LIZ" | dd of=${metadata_file} bs=1 seek=0 count=3 conv=notrunc
+echo -n "MFS" | dd of=${metadata_file} bs=1 seek=$(( $(stat --print="%s" ${metadata_file}) - 15)) count=3 conv=notrunc
+assert_equals "$(head -c8 ${metadata_file})" "${LEGACY_HEADER_TAG}"
+assert_equals "$(tail -c16 ${metadata_file})" "${LEGACY_TRAILER_TAG}"
+
+mv -iv "${info[master0_data_path]}/metadata.sfs" "${info[master0_data_path]}/metadata.mfs"
+assertlocal_file_exists "${info[master0_data_path]}/metadata.mfs"
+
+# Start master server to reload metadata legacy format
+assertlocal_success saunafs_master_n 0 start
+# Restart master server to load metadata in new format when both are present
+assertlocal_success saunafs_master_n 0 restart
+assertlocal_file_exists "${info[master0_data_path]}/metadata.sfs"
+assertlocal_file_exists "${info[master0_data_path]}/metadata.mfs"
+
+# Shadows has not  synchronize metadata at this point
+assertlocal_file_not_exists "${info[master1_data_path]}/metadata.sfs"
+#start shadow server to synchronize metadata
+assert_success saunafs_master_n 1 start
+assert_eventually "saunafs_shadow_synchronized 1"
+assertlocal_file_exists "${info[master1_data_path]}/metadata.sfs"
+
+# Stop master server to save metadata in new format
+assert_success saunafs_master_n 0 stop
+
+# Synchronized metadata in shadows has proper Tags
+SHADOW_METADATA_FILE="${info[master1_data_path]}/metadata.sfs"
+assert_equals "$(head -c8 ${SHADOW_METADATA_FILE})" "${ACTUAL_HEADER_TAG}"
+assert_equals "$(tail -c16 ${SHADOW_METADATA_FILE})" "${ACTUAL_TRAILER_TAG}"
+
+# Stop metalogger service and verify created changelogs
+saunafs_metalogger_daemon stop
+assertlocal_file_exists "${info[master0_data_path]}/changelog_ml.sfs"
+
+# Expected Values after reload
+metadata_file="${info[master0_data_path]}/metadata.sfs"
+assert_equals "$(head -c8 ${metadata_file})" "${ACTUAL_HEADER_TAG}"
+assert_equals "$(tail -c16 ${metadata_file})" "${ACTUAL_TRAILER_TAG}"