From 0c0c1fd973013671ea63680fcd9802766c1d04fe Mon Sep 17 00:00:00 2001 From: Marc Mari Date: Fri, 12 Aug 2016 09:27:02 -0400 Subject: blockdev: Add dynamic generation of module_block.h MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit To simplify the addition of new block modules, add a script that generates module_block.h automatically from the modules' source code. This script assumes that the QEMU coding style rules are followed. Signed-off-by: Marc Marí Signed-off-by: Colin Lord Reviewed-by: Stefan Hajnoczi Message-id: 1471008424-16465-3-git-send-email-clord@redhat.com Reviewed-by: Max Reitz Signed-off-by: Max Reitz --- Makefile | 7 +++ scripts/modules/module_block.py | 108 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 115 insertions(+) create mode 100644 scripts/modules/module_block.py diff --git a/Makefile b/Makefile index 444ae37..b7d1200 100644 --- a/Makefile +++ b/Makefile @@ -76,6 +76,8 @@ GENERATED_HEADERS += trace/generated-ust-provider.h GENERATED_SOURCES += trace/generated-ust.c endif +GENERATED_HEADERS += module_block.h + # Don't try to regenerate Makefile or configure # We don't generate any of them Makefile: ; @@ -352,6 +354,11 @@ ivshmem-client$(EXESUF): $(ivshmem-client-obj-y) libqemuutil.a libqemustub.a ivshmem-server$(EXESUF): $(ivshmem-server-obj-y) libqemuutil.a libqemustub.a $(call LINK, $^) +module_block.h: $(SRC_PATH)/scripts/modules/module_block.py config-host.mak + $(call quiet-command,$(PYTHON) $< $@ \ + $(addprefix $(SRC_PATH)/,$(patsubst %.mo,%.c,$(block-obj-m))), \ + " GEN $@") + clean: # avoid old build problems by removing potentially incorrect old files rm -f config.mak op-i386.h opc-i386.h gen-op-i386.h op-arm.h opc-arm.h gen-op-arm.h diff --git a/scripts/modules/module_block.py b/scripts/modules/module_block.py new file mode 100644 index 0000000..db4fb54 --- /dev/null +++ b/scripts/modules/module_block.py @@ -0,0 +1,108 @@ +#!/usr/bin/python +# +# Module information generator +# +# Copyright Red Hat, Inc. 2015 - 2016 +# +# Authors: +# Marc Mari +# +# This work is licensed under the terms of the GNU GPL, version 2. +# See the COPYING file in the top-level directory. + +from __future__ import print_function +import sys +import os + +def get_string_struct(line): + data = line.split() + + # data[0] -> struct element name + # data[1] -> = + # data[2] -> value + + return data[2].replace('"', '')[:-1] + +def add_module(fheader, library, format_name, protocol_name): + lines = [] + lines.append('.library_name = "' + library + '",') + if format_name != "": + lines.append('.format_name = "' + format_name + '",') + if protocol_name != "": + lines.append('.protocol_name = "' + protocol_name + '",') + + text = '\n '.join(lines) + fheader.write('\n {\n ' + text + '\n },') + +def process_file(fheader, filename): + # This parser assumes the coding style rules are being followed + with open(filename, "r") as cfile: + found_something = False + found_start = False + library, _ = os.path.splitext(os.path.basename(filename)) + for line in cfile: + if found_start: + line = line.replace('\n', '') + if line.find(".format_name") != -1: + format_name = get_string_struct(line) + elif line.find(".protocol_name") != -1: + protocol_name = get_string_struct(line) + elif line == "};": + add_module(fheader, library, format_name, protocol_name) + found_start = False + elif line.find("static BlockDriver") != -1: + found_something = True + found_start = True + format_name = "" + protocol_name = "" + + if not found_something: + print("No BlockDriver struct found in " + filename + ". \ + Is this really a module?", file=sys.stderr) + sys.exit(1) + +def print_top(fheader): + fheader.write('''/* AUTOMATICALLY GENERATED, DO NOT MODIFY */ +/* + * QEMU Block Module Infrastructure + * + * Authors: + * Marc Mari + */ + +''') + + fheader.write('''#ifndef QEMU_MODULE_BLOCK_H +#define QEMU_MODULE_BLOCK_H + +#include "qemu-common.h" + +static const struct { + const char *format_name; + const char *protocol_name; + const char *library_name; +} block_driver_modules[] = {''') + +def print_bottom(fheader): + fheader.write(''' +}; + +#endif +''') + +# First argument: output file +# All other arguments: modules source files (.c) +output_file = sys.argv[1] +with open(output_file, 'w') as fheader: + print_top(fheader) + + for filename in sys.argv[2:]: + if os.path.isfile(filename): + process_file(fheader, filename) + else: + print("File " + filename + " does not exist.", file=sys.stderr) + sys.exit(1) + + print_bottom(fheader) + +sys.exit(0) -- cgit v1.1