diff options
Diffstat (limited to 'scripts')
| -rwxr-xr-x | scripts/bpf_doc.py (renamed from scripts/bpf_helpers_doc.py) | 91 |
1 files changed, 63 insertions, 28 deletions
diff --git a/scripts/bpf_helpers_doc.py b/scripts/bpf_doc.py index 867ada23281c..5a4f68aab335 100755 --- a/scripts/bpf_helpers_doc.py +++ b/scripts/bpf_doc.py @@ -2,6 +2,7 @@ # SPDX-License-Identifier: GPL-2.0-only # # Copyright (C) 2018-2019 Netronome Systems, Inc. +# Copyright (C) 2021 Isovalent, Inc. # In case user attempts to run with Python 2. from __future__ import print_function @@ -165,10 +166,11 @@ class Printer(object): """ A generic class for printers. Printers should be created with an array of Helper objects, and implement a way to print them in the desired fashion. - @helpers: array of Helper objects to print to standard output + @parser: A HeaderParser with objects to print to standard output """ - def __init__(self, helpers): - self.helpers = helpers + def __init__(self, parser): + self.parser = parser + self.elements = [] def print_header(self): pass @@ -181,19 +183,23 @@ class Printer(object): def print_all(self): self.print_header() - for helper in self.helpers: - self.print_one(helper) + for elem in self.elements: + self.print_one(elem) self.print_footer() + class PrinterRST(Printer): """ - A printer for dumping collected information about helpers as a ReStructured - Text page compatible with the rst2man program, which can be used to - generate a manual page for the helpers. - @helpers: array of Helper objects to print to standard output + A generic class for printers that print ReStructured Text. Printers should + be created with a HeaderParser object, and implement a way to print API + elements in the desired fashion. + @parser: A HeaderParser with objects to print to standard output """ - def print_header(self): - header = '''\ + def __init__(self, parser): + self.parser = parser + + def print_license(self): + license = '''\ .. Copyright (C) All BPF authors and contributors from 2014 to present. .. See git log include/uapi/linux/bpf.h in kernel tree for details. .. @@ -221,9 +227,39 @@ class PrinterRST(Printer): .. .. Please do not edit this file. It was generated from the documentation .. located in file include/uapi/linux/bpf.h of the Linux kernel sources -.. (helpers description), and from scripts/bpf_helpers_doc.py in the same +.. (helpers description), and from scripts/bpf_doc.py in the same .. repository (header and footer). +''' + print(license) + + def print_elem(self, elem): + if (elem.desc): + print('\tDescription') + # Do not strip all newline characters: formatted code at the end of + # a section must be followed by a blank line. + for line in re.sub('\n$', '', elem.desc, count=1).split('\n'): + print('{}{}'.format('\t\t' if line else '', line)) + + if (elem.ret): + print('\tReturn') + for line in elem.ret.rstrip().split('\n'): + print('{}{}'.format('\t\t' if line else '', line)) + + print('') + +class PrinterHelpersRST(PrinterRST): + """ + A printer for dumping collected information about helpers as a ReStructured + Text page compatible with the rst2man program, which can be used to + generate a manual page for the helpers. + @parser: A HeaderParser with Helper objects to print to standard output + """ + def __init__(self, parser): + self.elements = parser.helpers + + def print_header(self): + header = '''\ =========== BPF-HELPERS =========== @@ -264,6 +300,7 @@ kernel at the top). HELPERS ======= ''' + PrinterRST.print_license(self) print(header) def print_footer(self): @@ -380,27 +417,19 @@ SEE ALSO def print_one(self, helper): self.print_proto(helper) + self.print_elem(helper) - if (helper.desc): - print('\tDescription') - # Do not strip all newline characters: formatted code at the end of - # a section must be followed by a blank line. - for line in re.sub('\n$', '', helper.desc, count=1).split('\n'): - print('{}{}'.format('\t\t' if line else '', line)) - if (helper.ret): - print('\tReturn') - for line in helper.ret.rstrip().split('\n'): - print('{}{}'.format('\t\t' if line else '', line)) - print('') class PrinterHelpers(Printer): """ A printer for dumping collected information about helpers as C header to be included from BPF program. - @helpers: array of Helper objects to print to standard output + @parser: A HeaderParser with Helper objects to print to standard output """ + def __init__(self, parser): + self.elements = parser.helpers type_fwds = [ 'struct bpf_fib_lookup', @@ -511,7 +540,7 @@ class PrinterHelpers(Printer): def print_header(self): header = '''\ -/* This is auto-generated file. See bpf_helpers_doc.py for details. */ +/* This is auto-generated file. See bpf_doc.py for details. */ /* Forward declarations of BPF structs */''' @@ -589,8 +618,12 @@ script = os.path.abspath(sys.argv[0]) linuxRoot = os.path.dirname(os.path.dirname(script)) bpfh = os.path.join(linuxRoot, 'include/uapi/linux/bpf.h') +printers = { + 'helpers': PrinterHelpersRST, +} + argParser = argparse.ArgumentParser(description=""" -Parse eBPF header file and generate documentation for eBPF helper functions. +Parse eBPF header file and generate documentation for the eBPF API. The RST-formatted output produced can be turned into a manual page with the rst2man utility. """) @@ -601,6 +634,8 @@ if (os.path.isfile(bpfh)): default=bpfh) else: argParser.add_argument('--filename', help='path to include/uapi/linux/bpf.h') +argParser.add_argument('target', nargs='?', default='helpers', + choices=printers.keys(), help='eBPF API target') args = argParser.parse_args() # Parse file. @@ -609,7 +644,7 @@ headerParser.run() # Print formatted output to standard output. if args.header: - printer = PrinterHelpers(headerParser.helpers) + printer = PrinterHelpers(headerParser) else: - printer = PrinterRST(headerParser.helpers) + printer = printers[args.target](headerParser) printer.print_all() |