Merge tag 'docs/v6.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-docs into mauro

Mauro says:

As discussed at:
   https://lore.kernel.org/all/20250610101331.62ba466f@foz.lan/

changeset f061c9f7d058 ("Documentation: Document each netlink family")
added a logic which generates *.rst files inside $(srctree). This is bad
when O=<BUILDDIR> is used.

A recent change renamed the yaml files used by Netlink, revealing a bad
side effect: as "make cleandocs" don't clean the produced files and symbols
appear duplicated for people that don't build the kernel from scratch.

This series adds an yaml parser extension and uses an index file with glob for
*. We opted to write such extension in a way that no actual yaml conversion
code is inside it. This makes it flexible enough to handle other types of yaml
files in the future. The actual yaml conversion logic were placed at
netlink_yml_parser.py.

As requested by YNL maintainers, this version has netlink_yml_parser.py
inside tools/net/ynl/pyynl/ directory. I don't like mixing libraries with
binaries, nor to have Python libraries spread all over the Kernel. IMO,
the best is to put all of them on a common place (scripts/lib, python/lib,
lib/python, ...) but, as this can be solved later, for now let's keep it this
way.

14 files changed, 565 insertions, 410 deletions

diff --git a/Documentation/Makefile b/Documentation/Makefile
index b98477df5ddf..820f07e0afe6 100644
--- a/Documentation/Makefile
+++ b/Documentation/Makefile
@@ -104,22 +104,6 @@ quiet_cmd_sphinx = SPHINX  $@ --> file://$(abspath $(BUILDDIR)/$3/$4)
 		cp $(if $(patsubst /%,,$(DOCS_CSS)),$(abspath $(srctree)/$(DOCS_CSS)),$(DOCS_CSS)) $(BUILDDIR)/$3/_static/; \
 	fi
 
-YNL_INDEX:=$(srctree)/Documentation/networking/netlink_spec/index.rst
-YNL_RST_DIR:=$(srctree)/Documentation/networking/netlink_spec
-YNL_YAML_DIR:=$(srctree)/Documentation/netlink/specs
-YNL_TOOL:=$(srctree)/tools/net/ynl/pyynl/ynl_gen_rst.py
-
-YNL_RST_FILES_TMP := $(patsubst %.yaml,%.rst,$(wildcard $(YNL_YAML_DIR)/*.yaml))
-YNL_RST_FILES := $(patsubst $(YNL_YAML_DIR)%,$(YNL_RST_DIR)%, $(YNL_RST_FILES_TMP))
-
-$(YNL_INDEX): $(YNL_RST_FILES)
-	$(Q)$(YNL_TOOL) -o $@ -x
-
-$(YNL_RST_DIR)/%.rst: $(YNL_YAML_DIR)/%.yaml $(YNL_TOOL)
-	$(Q)$(YNL_TOOL) -i $< -o $@
-
-htmldocs texinfodocs latexdocs epubdocs xmldocs: $(YNL_INDEX)
-
 htmldocs:
 	@$(srctree)/scripts/sphinx-pre-install --version-check
 	@+$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,html,$(var),,$(var)))
@@ -186,7 +170,6 @@ refcheckdocs:
 	$(Q)cd $(srctree);scripts/documentation-file-ref-check
 
 cleandocs:
-	$(Q)rm -f $(YNL_INDEX) $(YNL_RST_FILES)
 	$(Q)rm -rf $(BUILDDIR)
 	$(Q)$(MAKE) BUILDDIR=$(abspath $(BUILDDIR)) $(build)=Documentation/userspace-api/media clean
 
diff --git a/Documentation/conf.py b/Documentation/conf.py
index 700516238d3f..f9828f3862f9 100644
--- a/Documentation/conf.py
+++ b/Documentation/conf.py
@@ -42,6 +42,15 @@ exclude_patterns = []
 dyn_include_patterns = []
 dyn_exclude_patterns = ["output"]
 
+# Currently, only netlink/specs has a parser for yaml.
+# Prefer using include patterns if available, as it is faster
+if has_include_patterns:
+    dyn_include_patterns.append("netlink/specs/*.yaml")
+else:
+    dyn_exclude_patterns.append("netlink/*.yaml")
+    dyn_exclude_patterns.append("devicetree/bindings/**.yaml")
+    dyn_exclude_patterns.append("core-api/kho/bindings/**.yaml")
+
 # Properly handle include/exclude patterns
 # ----------------------------------------
 
@@ -102,12 +111,12 @@ extensions = [
     "kernel_include",
     "kfigure",
     "maintainers_include",
+    "parser_yaml",
     "rstFlatTable",
     "sphinx.ext.autosectionlabel",
     "sphinx.ext.ifconfig",
     "translations",
 ]
-
 # Since Sphinx version 3, the C function parser is more pedantic with regards
 # to type checking. Due to that, having macros at c:function cause problems.
 # Those needed to be escaped by using c_id_attributes[] array
@@ -204,10 +213,11 @@ else:
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ["sphinx/templates"]
 
-# The suffix(es) of source filenames.
-# You can specify multiple suffix as a list of string:
-# source_suffix = ['.rst', '.md']
-source_suffix = '.rst'
+# The suffixes of source filenames that will be automatically parsed
+source_suffix = {
+    ".rst": "restructuredtext",
+    ".yaml": "yaml",
+}
 
 # The encoding of source files.
 # source_encoding = 'utf-8-sig'
diff --git a/Documentation/netlink/specs/index.rst b/Documentation/netlink/specs/index.rst
new file mode 100644
index 000000000000..7f7cf4a096f2
--- /dev/null
+++ b/Documentation/netlink/specs/index.rst
@@ -0,0 +1,13 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+.. _specs:
+
+=============================
+Netlink Family Specifications
+=============================
+
+.. toctree::
+   :maxdepth: 1
+   :glob:
+
+   *
diff --git a/Documentation/networking/index.rst b/Documentation/networking/index.rst
index ac90b82f3ce9..b7a4969e9bc9 100644
--- a/Documentation/networking/index.rst
+++ b/Documentation/networking/index.rst
@@ -57,7 +57,7 @@ Contents:
    filter
    generic-hdlc
    generic_netlink
-   netlink_spec/index
+   ../netlink/specs/index
    gen_stats
    gtp
    ila
diff --git a/Documentation/networking/netlink_spec/.gitignore b/Documentation/networking/netlink_spec/.gitignore
deleted file mode 100644
index 30d85567b592..000000000000
--- a/Documentation/networking/netlink_spec/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-*.rst
diff --git a/Documentation/networking/netlink_spec/readme.txt b/Documentation/networking/netlink_spec/readme.txt
deleted file mode 100644
index 030b44aca4e6..000000000000
--- a/Documentation/networking/netlink_spec/readme.txt
+++ /dev/null
@@ -1,4 +0,0 @@
-SPDX-License-Identifier: GPL-2.0
-
-This file is populated during the build of the documentation (htmldocs) by the
-tools/net/ynl/pyynl/ynl_gen_rst.py script.
diff --git a/Documentation/sphinx/parser_yaml.py b/Documentation/sphinx/parser_yaml.py
new file mode 100755
index 000000000000..634d84a202fc
--- /dev/null
+++ b/Documentation/sphinx/parser_yaml.py
@@ -0,0 +1,123 @@
+# SPDX-License-Identifier: GPL-2.0
+# Copyright 2025 Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
+
+"""
+Sphinx extension for processing YAML files
+"""
+
+import os
+import re
+import sys
+
+from pprint import pformat
+
+from docutils import statemachine
+from docutils.parsers.rst import Parser as RSTParser
+from docutils.parsers.rst import states
+from docutils.statemachine import ViewList
+
+from sphinx.util import logging
+from sphinx.parsers import Parser
+
+srctree = os.path.abspath(os.environ["srctree"])
+sys.path.insert(0, os.path.join(srctree, "tools/net/ynl/pyynl/lib"))
+
+from doc_generator import YnlDocGenerator        # pylint: disable=C0413
+
+logger = logging.getLogger(__name__)
+
+class YamlParser(Parser):
+    """
+    Kernel parser for YAML files.
+
+    This is a simple sphinx.Parser to handle yaml files inside the
+    Kernel tree that will be part of the built documentation.
+
+    The actual parser function is not contained here: the code was
+    written in a way that parsing yaml for different subsystems
+    can be done from a single dispatcher.
+
+    All it takes to have parse YAML patches is to have an import line:
+
+            from some_parser_code import NewYamlGenerator
+
+    To this module. Then add an instance of the parser with:
+
+            new_parser = NewYamlGenerator()
+
+    and add a logic inside parse() to handle it based on the path,
+    like this:
+
+            if "/foo" in fname:
+                msg = self.new_parser.parse_yaml_file(fname)
+    """
+
+    supported = ('yaml', )
+
+    netlink_parser = YnlDocGenerator()
+
+    re_lineno = re.compile(r"\.\. LINENO ([0-9]+)$")
+
+    tab_width = 8
+
+    def rst_parse(self, inputstring, document, msg):
+        """
+        Receives a ReST content that was previously converted by the
+        YAML parser, adding it to the document tree.
+        """
+
+        self.setup_parse(inputstring, document)
+
+        result = ViewList()
+
+        self.statemachine = states.RSTStateMachine(state_classes=states.state_classes,
+                                                   initial_state='Body',
+                                                   debug=document.reporter.debug_flag)
+
+        try:
+            # Parse message with RSTParser
+            lineoffset = 0;
+
+            lines = statemachine.string2lines(msg, self.tab_width,
+                                              convert_whitespace=True)
+
+            for line in lines:
+                match = self.re_lineno.match(line)
+                if match:
+                    lineoffset = int(match.group(1))
+                    continue
+
+                result.append(line, document.current_source, lineoffset)
+
+            self.statemachine.run(result, document)
+
+        except Exception as e:
+            document.reporter.error("YAML parsing error: %s" % pformat(e))
+
+        self.finish_parse()
+
+    # Overrides docutils.parsers.Parser. See sphinx.parsers.RSTParser
+    def parse(self, inputstring, document):
+        """Check if a YAML is meant to be parsed."""
+
+        fname = document.current_source
+
+        # Handle netlink yaml specs
+        if "/netlink/specs/" in fname:
+            msg = self.netlink_parser.parse_yaml_file(fname)
+            self.rst_parse(inputstring, document, msg)
+
+        # All other yaml files are ignored
+
+def setup(app):
+    """Setup function for the Sphinx extension."""
+
+    # Add YAML parser
+    app.add_source_parser(YamlParser)
+    app.add_source_suffix('.yaml', 'yaml')
+
+    return {
+        'version': '1.0',
+        'parallel_read_safe': True,
+        'parallel_write_safe': True,
+    }
diff --git a/Documentation/userspace-api/netlink/index.rst b/Documentation/userspace-api/netlink/index.rst
index c1b6765cc963..83ae25066591 100644
--- a/Documentation/userspace-api/netlink/index.rst
+++ b/Documentation/userspace-api/netlink/index.rst
@@ -18,4 +18,4 @@ Netlink documentation for users.
 
 See also:
  - :ref:`Documentation/core-api/netlink.rst <kernel_netlink>`
- - :ref:`Documentation/networking/netlink_spec/index.rst <specs>`
+ - :ref:`Documentation/netlink/specs/index.rst <specs>`
diff --git a/Documentation/userspace-api/netlink/netlink-raw.rst b/Documentation/userspace-api/netlink/netlink-raw.rst
index 31fc91020eb3..aae296c170c5 100644
--- a/Documentation/userspace-api/netlink/netlink-raw.rst
+++ b/Documentation/userspace-api/netlink/netlink-raw.rst
@@ -62,8 +62,8 @@ Sub-messages
 ------------
 
 Several raw netlink families such as
-:doc:`rt-link<../../networking/netlink_spec/rt-link>` and
-:doc:`tc<../../networking/netlink_spec/tc>` use attribute nesting as an
+:ref:`rt-link<netlink-rt-link>` and
+:ref:`tc<netlink-tc>` use attribute nesting as an
 abstraction to carry module specific information.
 
 Conceptually it looks as follows::
@@ -162,7 +162,7 @@ then this is an error.
 Nested struct definitions
 -------------------------
 
-Many raw netlink families such as :doc:`tc<../../networking/netlink_spec/tc>`
+Many raw netlink families such as :ref:`tc<netlink-tc>`
 make use of nested struct definitions. The ``netlink-raw`` schema makes it
 possible to embed a struct within a struct definition using the ``struct``
 property. For example, the following struct definition embeds the
diff --git a/Documentation/userspace-api/netlink/specs.rst b/Documentation/userspace-api/netlink/specs.rst
index 1b50d97d8d7c..debb4bfca5c4 100644
--- a/Documentation/userspace-api/netlink/specs.rst
+++ b/Documentation/userspace-api/netlink/specs.rst
@@ -15,7 +15,7 @@ kernel headers directly.
 Internally kernel uses the YAML specs to generate:
 
  - the C uAPI header
- - documentation of the protocol as a ReST file - see :ref:`Documentation/networking/netlink_spec/index.rst <specs>`
+ - documentation of the protocol as a ReST file - see :ref:`Documentation/netlink/specs/index.rst <specs>`
  - policy tables for input attribute validation
  - operation tables
 
diff --git a/MAINTAINERS b/MAINTAINERS
index fe168477caa4..39d5e4e09273 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7307,6 +7307,7 @@ F:	scripts/get_abi.py
 F:	scripts/kernel-doc*
 F:	scripts/lib/abi/*
 F:	scripts/lib/kdoc/*
+F:	tools/net/ynl/pyynl/lib/doc_generator.py
 F:	scripts/sphinx-pre-install
 X:	Documentation/ABI/
 X:	Documentation/admin-guide/media/
diff --git a/tools/net/ynl/pyynl/lib/__init__.py b/tools/net/ynl/pyynl/lib/__init__.py
index 71518b9842ee..5f266ebe4526 100644
--- a/tools/net/ynl/pyynl/lib/__init__.py
+++ b/tools/net/ynl/pyynl/lib/__init__.py
@@ -4,6 +4,8 @@ from .nlspec import SpecAttr, SpecAttrSet, SpecEnumEntry, SpecEnumSet, \
     SpecFamily, SpecOperation, SpecSubMessage, SpecSubMessageFormat
 from .ynl import YnlFamily, Netlink, NlError
 
+from .doc_generator import YnlDocGenerator
+
 __all__ = ["SpecAttr", "SpecAttrSet", "SpecEnumEntry", "SpecEnumSet",
            "SpecFamily", "SpecOperation", "SpecSubMessage", "SpecSubMessageFormat",
            "YnlFamily", "Netlink", "NlError"]
diff --git a/tools/net/ynl/pyynl/lib/doc_generator.py b/tools/net/ynl/pyynl/lib/doc_generator.py
new file mode 100644
index 000000000000..403abf1a2eda
--- /dev/null
+++ b/tools/net/ynl/pyynl/lib/doc_generator.py
@@ -0,0 +1,398 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0
+# -*- coding: utf-8; mode: python -*-
+
+"""
+    Class to auto generate the documentation for Netlink specifications.
+
+    :copyright:  Copyright (C) 2023  Breno Leitao <leitao@debian.org>
+    :license:    GPL Version 2, June 1991 see linux/COPYING for details.
+
+    This class performs extensive parsing to the Linux kernel's netlink YAML
+    spec files, in an effort to avoid needing to heavily mark up the original
+    YAML file.
+
+    This code is split in two classes:
+        1) RST formatters: Use to convert a string to a RST output
+        2) YAML Netlink (YNL) doc generator: Generate docs from YAML data
+"""
+
+from typing import Any, Dict, List
+import yaml
+
+LINE_STR = '__lineno__'
+
+class NumberedSafeLoader(yaml.SafeLoader):              # pylint: disable=R0901
+    """Override the SafeLoader class to add line number to parsed data"""
+
+    def construct_mapping(self, node, *args, **kwargs):
+        mapping = super().construct_mapping(node, *args, **kwargs)
+        mapping[LINE_STR] = node.start_mark.line
+
+        return mapping
+
+class RstFormatters:
+    """RST Formatters"""
+
+    SPACE_PER_LEVEL = 4
+
+    @staticmethod
+    def headroom(level: int) -> str:
+        """Return space to format"""
+        return " " * (level * RstFormatters.SPACE_PER_LEVEL)
+
+    @staticmethod
+    def bold(text: str) -> str:
+        """Format bold text"""
+        return f"**{text}**"
+
+    @staticmethod
+    def inline(text: str) -> str:
+        """Format inline text"""
+        return f"``{text}``"
+
+    @staticmethod
+    def sanitize(text: str) -> str:
+        """Remove newlines and multiple spaces"""
+        # This is useful for some fields that are spread across multiple lines
+        return str(text).replace("\n", " ").strip()
+
+    def rst_fields(self, key: str, value: str, level: int = 0) -> str:
+        """Return a RST formatted field"""
+        return self.headroom(level) + f":{key}: {value}"
+
+    def rst_definition(self, key: str, value: Any, level: int = 0) -> str:
+        """Format a single rst definition"""
+        return self.headroom(level) + key + "\n" + self.headroom(level + 1) + str(value)
+
+    def rst_paragraph(self, paragraph: str, level: int = 0) -> str:
+        """Return a formatted paragraph"""
+        return self.headroom(level) + paragraph
+
+    def rst_bullet(self, item: str, level: int = 0) -> str:
+        """Return a formatted a bullet"""
+        return self.headroom(level) + f"- {item}"
+
+    @staticmethod
+    def rst_subsection(title: str) -> str:
+        """Add a sub-section to the document"""
+        return f"{title}\n" + "-" * len(title)
+
+    @staticmethod
+    def rst_subsubsection(title: str) -> str:
+        """Add a sub-sub-section to the document"""
+        return f"{title}\n" + "~" * len(title)
+
+    @staticmethod
+    def rst_section(namespace: str, prefix: str, title: str) -> str:
+        """Add a section to the document"""
+        return f".. _{namespace}-{prefix}-{title}:\n\n{title}\n" + "=" * len(title)
+
+    @staticmethod
+    def rst_subtitle(title: str) -> str:
+        """Add a subtitle to the document"""
+        return "\n" + "-" * len(title) + f"\n{title}\n" + "-" * len(title) + "\n\n"
+
+    @staticmethod
+    def rst_title(title: str) -> str:
+        """Add a title to the document"""
+        return "=" * len(title) + f"\n{title}\n" + "=" * len(title) + "\n\n"
+
+    def rst_list_inline(self, list_: List[str], level: int = 0) -> str:
+        """Format a list using inlines"""
+        return self.headroom(level) + "[" + ", ".join(self.inline(i) for i in list_) + "]"
+
+    @staticmethod
+    def rst_ref(namespace: str, prefix: str, name: str) -> str:
+        """Add a hyperlink to the document"""
+        mappings = {'enum': 'definition',
+                    'fixed-header': 'definition',
+                    'nested-attributes': 'attribute-set',
+                    'struct': 'definition'}
+        if prefix in mappings:
+            prefix = mappings[prefix]
+        return f":ref:`{namespace}-{prefix}-{name}`"
+
+    def rst_header(self) -> str:
+        """The headers for all the auto generated RST files"""
+        lines = []
+
+        lines.append(self.rst_paragraph(".. SPDX-License-Identifier: GPL-2.0"))
+        lines.append(self.rst_paragraph(".. NOTE: This document was auto-generated.\n\n"))
+
+        return "\n".join(lines)
+
+    @staticmethod
+    def rst_toctree(maxdepth: int = 2) -> str:
+        """Generate a toctree RST primitive"""
+        lines = []
+
+        lines.append(".. toctree::")
+        lines.append(f"   :maxdepth: {maxdepth}\n\n")
+
+        return "\n".join(lines)
+
+    @staticmethod
+    def rst_label(title: str) -> str:
+        """Return a formatted label"""
+        return f".. _{title}:\n\n"
+
+    @staticmethod
+    def rst_lineno(lineno: int) -> str:
+        """Return a lineno comment"""
+        return f".. LINENO {lineno}\n"
+
+class YnlDocGenerator:
+    """YAML Netlink specs Parser"""
+
+    fmt = RstFormatters()
+
+    def parse_mcast_group(self, mcast_group: List[Dict[str, Any]]) -> str:
+        """Parse 'multicast' group list and return a formatted string"""
+        lines = []
+        for group in mcast_group:
+            lines.append(self.fmt.rst_bullet(group["name"]))
+
+        return "\n".join(lines)
+
+    def parse_do(self, do_dict: Dict[str, Any], level: int = 0) -> str:
+        """Parse 'do' section and return a formatted string"""
+        lines = []
+        if LINE_STR in do_dict:
+            lines.append(self.fmt.rst_lineno(do_dict[LINE_STR]))
+
+        for key in do_dict.keys():
+            if key == LINE_STR:
+                continue
+            lines.append(self.fmt.rst_paragraph(self.fmt.bold(key), level + 1))
+            if key in ['request', 'reply']:
+                lines.append(self.parse_do_attributes(do_dict[key], level + 1) + "\n")
+            else:
+                lines.append(self.fmt.headroom(level + 2) + do_dict[key] + "\n")
+
+        return "\n".join(lines)
+
+    def parse_do_attributes(self, attrs: Dict[str, Any], level: int = 0) -> str:
+        """Parse 'attributes' section"""
+        if "attributes" not in attrs:
+            return ""
+        lines = [self.fmt.rst_fields("attributes",
+                                     self.fmt.rst_list_inline(attrs["attributes"]),
+                                     level + 1)]
+
+        return "\n".join(lines)
+
+    def parse_operations(self, operations: List[Dict[str, Any]], namespace: str) -> str:
+        """Parse operations block"""
+        preprocessed = ["name", "doc", "title", "do", "dump", "flags"]
+        linkable = ["fixed-header", "attribute-set"]
+        lines = []
+
+        for operation in operations:
+            if LINE_STR in operation:
+                lines.append(self.fmt.rst_lineno(operation[LINE_STR]))
+
+            lines.append(self.fmt.rst_section(namespace, 'operation',
+                                              operation["name"]))
+            lines.append(self.fmt.rst_paragraph(operation["doc"]) + "\n")
+
+            for key in operation.keys():
+                if key == LINE_STR:
+                    continue
+
+                if key in preprocessed:
+                    # Skip the special fields
+                    continue
+                value = operation[key]
+                if key in linkable:
+                    value = self.fmt.rst_ref(namespace, key, value)
+                lines.append(self.fmt.rst_fields(key, value, 0))
+            if 'flags' in operation:
+                lines.append(self.fmt.rst_fields('flags',
+                                                 self.fmt.rst_list_inline(operation['flags'])))
+
+            if "do" in operation:
+                lines.append(self.fmt.rst_paragraph(":do:", 0))
+                lines.append(self.parse_do(operation["do"], 0))
+            if "dump" in operation:
+                lines.append(self.fmt.rst_paragraph(":dump:", 0))
+                lines.append(self.parse_do(operation["dump"], 0))
+
+            # New line after fields
+            lines.append("\n")
+
+        return "\n".join(lines)
+
+    def parse_entries(self, entries: List[Dict[str, Any]], level: int) -> str:
+        """Parse a list of entries"""
+        ignored = ["pad"]
+        lines = []
+        for entry in entries:
+            if isinstance(entry, dict):
+                # entries could be a list or a dictionary
+                field_name = entry.get("name", "")
+                if field_name in ignored:
+                    continue
+                type_ = entry.get("type")
+                if type_:
+                    field_name += f" ({self.fmt.inline(type_)})"
+                lines.append(
+                    self.fmt.rst_fields(field_name,
+                                        self.fmt.sanitize(entry.get("doc", "")),
+                                        level)
+                )
+            elif isinstance(entry, list):
+                lines.append(self.fmt.rst_list_inline(entry, level))
+            else:
+                lines.append(self.fmt.rst_bullet(self.fmt.inline(self.fmt.sanitize(entry)),
+                                                 level))
+
+        lines.append("\n")
+        return "\n".join(lines)
+
+    def parse_definitions(self, defs: Dict[str, Any], namespace: str) -> str:
+        """Parse definitions section"""
+        preprocessed = ["name", "entries", "members"]
+        ignored = ["render-max"]  # This is not printed
+        lines = []
+
+        for definition in defs:
+            if LINE_STR in definition:
+                lines.append(self.fmt.rst_lineno(definition[LINE_STR]))
+
+            lines.append(self.fmt.rst_section(namespace, 'definition', definition["name"]))
+            for k in definition.keys():
+                if k == LINE_STR:
+                    continue
+                if k in preprocessed + ignored:
+                    continue
+                lines.append(self.fmt.rst_fields(k, self.fmt.sanitize(definition[k]), 0))
+
+            # Field list needs to finish with a new line
+            lines.append("\n")
+            if "entries" in definition:
+                lines.append(self.fmt.rst_paragraph(":entries:", 0))
+                lines.append(self.parse_entries(definition["entries"], 1))
+            if "members" in definition:
+                lines.append(self.fmt.rst_paragraph(":members:", 0))
+                lines.append(self.parse_entries(definition["members"], 1))
+
+        return "\n".join(lines)
+
+    def parse_attr_sets(self, entries: List[Dict[str, Any]], namespace: str) -> str:
+        """Parse attribute from attribute-set"""
+        preprocessed = ["name", "type"]
+        linkable = ["enum", "nested-attributes", "struct", "sub-message"]
+        ignored = ["checks"]
+        lines = []
+
+        for entry in entries:
+            lines.append(self.fmt.rst_section(namespace, 'attribute-set',
+                                              entry["name"]))
+            for attr in entry["attributes"]:
+                if LINE_STR in attr:
+                    lines.append(self.fmt.rst_lineno(attr[LINE_STR]))
+
+                type_ = attr.get("type")
+                attr_line = attr["name"]
+                if type_:
+                    # Add the attribute type in the same line
+                    attr_line += f" ({self.fmt.inline(type_)})"
+
+                lines.append(self.fmt.rst_subsubsection(attr_line))
+
+                for k in attr.keys():
+                    if k == LINE_STR:
+                        continue
+                    if k in preprocessed + ignored:
+                        continue
+                    if k in linkable:
+                        value = self.fmt.rst_ref(namespace, k, attr[k])
+                    else:
+                        value = self.fmt.sanitize(attr[k])
+                    lines.append(self.fmt.rst_fields(k, value, 0))
+                lines.append("\n")
+
+        return "\n".join(lines)
+
+    def parse_sub_messages(self, entries: List[Dict[str, Any]], namespace: str) -> str:
+        """Parse sub-message definitions"""
+        lines = []
+
+        for entry in entries:
+            lines.append(self.fmt.rst_section(namespace, 'sub-message',
+                                              entry["name"]))
+            for fmt in entry["formats"]:
+                value = fmt["value"]
+
+                lines.append(self.fmt.rst_bullet(self.fmt.bold(value)))
+                for attr in ['fixed-header', 'attribute-set']:
+                    if attr in fmt:
+                        lines.append(self.fmt.rst_fields(attr,
+                                                         self.fmt.rst_ref(namespace,
+                                                                          attr,
+                                                                          fmt[attr]),
+                                                         1))
+                lines.append("\n")
+
+        return "\n".join(lines)
+
+    def parse_yaml(self, obj: Dict[str, Any]) -> str:
+        """Format the whole YAML into a RST string"""
+        lines = []
+
+        # Main header
+        lineno = obj.get('__lineno__', 0)
+        lines.append(self.fmt.rst_lineno(lineno))
+
+        family = obj['name']
+
+        lines.append(self.fmt.rst_header())
+        lines.append(self.fmt.rst_label("netlink-" + family))
+
+        title = f"Family ``{family}`` netlink specification"
+        lines.append(self.fmt.rst_title(title))
+        lines.append(self.fmt.rst_paragraph(".. contents:: :depth: 3\n"))
+
+        if "doc" in obj:
+            lines.append(self.fmt.rst_subtitle("Summary"))
+            lines.append(self.fmt.rst_paragraph(obj["doc"], 0))
+
+        # Operations
+        if "operations" in obj:
+            lines.append(self.fmt.rst_subtitle("Operations"))
+            lines.append(self.parse_operations(obj["operations"]["list"],
+                                               family))
+
+        # Multicast groups
+        if "mcast-groups" in obj:
+            lines.append(self.fmt.rst_subtitle("Multicast groups"))
+            lines.append(self.parse_mcast_group(obj["mcast-groups"]["list"]))
+
+        # Definitions
+        if "definitions" in obj:
+            lines.append(self.fmt.rst_subtitle("Definitions"))
+            lines.append(self.parse_definitions(obj["definitions"], family))
+
+        # Attributes set
+        if "attribute-sets" in obj:
+            lines.append(self.fmt.rst_subtitle("Attribute sets"))
+            lines.append(self.parse_attr_sets(obj["attribute-sets"], family))
+
+        # Sub-messages
+        if "sub-messages" in obj:
+            lines.append(self.fmt.rst_subtitle("Sub-messages"))
+            lines.append(self.parse_sub_messages(obj["sub-messages"], family))
+
+        return "\n".join(lines)
+
+    # Main functions
+    # ==============
+
+    def parse_yaml_file(self, filename: str) -> str:
+        """Transform the YAML specified by filename into an RST-formatted string"""
+        with open(filename, "r", encoding="utf-8") as spec_file:
+            numbered_yaml = yaml.load(spec_file, Loader=NumberedSafeLoader)
+            content = self.parse_yaml(numbered_yaml)
+
+        return content
diff --git a/tools/net/ynl/pyynl/ynl_gen_rst.py b/tools/net/ynl/pyynl/ynl_gen_rst.py
index 0cb6348e28d3..90ae19aac89d 100755
--- a/tools/net/ynl/pyynl/ynl_gen_rst.py
+++ b/tools/net/ynl/pyynl/ynl_gen_rst.py
@@ -10,353 +10,17 @@
 
     This script performs extensive parsing to the Linux kernel's netlink YAML
     spec files, in an effort to avoid needing to heavily mark up the original
-    YAML file.
-
-    This code is split in three big parts:
-        1) RST formatters: Use to convert a string to a RST output
-        2) Parser helpers: Functions to parse the YAML data structure
-        3) Main function and small helpers
+    YAML file. It uses the library code from scripts/lib.
 """
 
-from typing import Any, Dict, List
 import os.path
+import pathlib
 import sys
 import argparse
 import logging
-import yaml
-
-
-SPACE_PER_LEVEL = 4
-
-
-# RST Formatters
-# ==============
-def headroom(level: int) -> str:
-    """Return space to format"""
-    return " " * (level * SPACE_PER_LEVEL)
-
-
-def bold(text: str) -> str:
-    """Format bold text"""
-    return f"**{text}**"
-
-
-def inline(text: str) -> str:
-    """Format inline text"""
-    return f"``{text}``"
-
-
-def sanitize(text: str) -> str:
-    """Remove newlines and multiple spaces"""
-    # This is useful for some fields that are spread across multiple lines
-    return str(text).replace("\n", " ").strip()
-
-
-def rst_fields(key: str, value: str, level: int = 0) -> str:
-    """Return a RST formatted field"""
-    return headroom(level) + f":{key}: {value}"
-
-
-def rst_definition(key: str, value: Any, level: int = 0) -> str:
-    """Format a single rst definition"""
-    return headroom(level) + key + "\n" + headroom(level + 1) + str(value)
-
-
-def rst_paragraph(paragraph: str, level: int = 0) -> str:
-    """Return a formatted paragraph"""
-    return headroom(level) + paragraph
-
-
-def rst_bullet(item: str, level: int = 0) -> str:
-    """Return a formatted a bullet"""
-    return headroom(level) + f"- {item}"
-
-
-def rst_subsection(title: str) -> str:
-    """Add a sub-section to the document"""
-    return f"{title}\n" + "-" * len(title)
-
-
-def rst_subsubsection(title: str) -> str:
-    """Add a sub-sub-section to the document"""
-    return f"{title}\n" + "~" * len(title)
-
-
-def rst_section(namespace: str, prefix: str, title: str) -> str:
-    """Add a section to the document"""
-    return f".. _{namespace}-{prefix}-{title}:\n\n{title}\n" + "=" * len(title)
-
-
-def rst_subtitle(title: str) -> str:
-    """Add a subtitle to the document"""
-    return "\n" + "-" * len(title) + f"\n{title}\n" + "-" * len(title) + "\n\n"
-
-
-def rst_title(title: str) -> str:
-    """Add a title to the document"""
-    return "=" * len(title) + f"\n{title}\n" + "=" * len(title) + "\n\n"
-
-
-def rst_list_inline(list_: List[str], level: int = 0) -> str:
-    """Format a list using inlines"""
-    return headroom(level) + "[" + ", ".join(inline(i) for i in list_) + "]"
-
-
-def rst_ref(namespace: str, prefix: str, name: str) -> str:
-    """Add a hyperlink to the document"""
-    mappings = {'enum': 'definition',
-                'fixed-header': 'definition',
-                'nested-attributes': 'attribute-set',
-                'struct': 'definition'}
-    if prefix in mappings:
-        prefix = mappings[prefix]
-    return f":ref:`{namespace}-{prefix}-{name}`"
-
-
-def rst_header() -> str:
-    """The headers for all the auto generated RST files"""
-    lines = []
-
-    lines.append(rst_paragraph(".. SPDX-License-Identifier: GPL-2.0"))
-    lines.append(rst_paragraph(".. NOTE: This document was auto-generated.\n\n"))
-
-    return "\n".join(lines)
-
-
-def rst_toctree(maxdepth: int = 2) -> str:
-    """Generate a toctree RST primitive"""
-    lines = []
-
-    lines.append(".. toctree::")
-    lines.append(f"   :maxdepth: {maxdepth}\n\n")
-
-    return "\n".join(lines)
-
-
-def rst_label(title: str) -> str:
-    """Return a formatted label"""
-    return f".. _{title}:\n\n"
-
-
-# Parsers
-# =======
-
-
-def parse_mcast_group(mcast_group: List[Dict[str, Any]]) -> str:
-    """Parse 'multicast' group list and return a formatted string"""
-    lines = []
-    for group in mcast_group:
-        lines.append(rst_bullet(group["name"]))
-
-    return "\n".join(lines)
-
-
-def parse_do(do_dict: Dict[str, Any], level: int = 0) -> str:
-    """Parse 'do' section and return a formatted string"""
-    lines = []
-    for key in do_dict.keys():
-        lines.append(rst_paragraph(bold(key), level + 1))
-        if key in ['request', 'reply']:
-            lines.append(parse_do_attributes(do_dict[key], level + 1) + "\n")
-        else:
-            lines.append(headroom(level + 2) + do_dict[key] + "\n")
-
-    return "\n".join(lines)
-
-
-def parse_do_attributes(attrs: Dict[str, Any], level: int = 0) -> str:
-    """Parse 'attributes' section"""
-    if "attributes" not in attrs:
-        return ""
-    lines = [rst_fields("attributes", rst_list_inline(attrs["attributes"]), level + 1)]
-
-    return "\n".join(lines)
-
-
-def parse_operations(operations: List[Dict[str, Any]], namespace: str) -> str:
-    """Parse operations block"""
-    preprocessed = ["name", "doc", "title", "do", "dump", "flags"]
-    linkable = ["fixed-header", "attribute-set"]
-    lines = []
-
-    for operation in operations:
-        lines.append(rst_section(namespace, 'operation', operation["name"]))
-        lines.append(rst_paragraph(operation["doc"]) + "\n")
-
-        for key in operation.keys():
-            if key in preprocessed:
-                # Skip the special fields
-                continue
-            value = operation[key]
-            if key in linkable:
-                value = rst_ref(namespace, key, value)
-            lines.append(rst_fields(key, value, 0))
-        if 'flags' in operation:
-            lines.append(rst_fields('flags', rst_list_inline(operation['flags'])))
-
-        if "do" in operation:
-            lines.append(rst_paragraph(":do:", 0))
-            lines.append(parse_do(operation["do"], 0))
-        if "dump" in operation:
-            lines.append(rst_paragraph(":dump:", 0))
-            lines.append(parse_do(operation["dump"], 0))
-
-        # New line after fields
-        lines.append("\n")
-
-    return "\n".join(lines)
-
-
-def parse_entries(entries: List[Dict[str, Any]], level: int) -> str:
-    """Parse a list of entries"""
-    ignored = ["pad"]
-    lines = []
-    for entry in entries:
-        if isinstance(entry, dict):
-            # entries could be a list or a dictionary
-            field_name = entry.get("name", "")
-            if field_name in ignored:
-                continue
-            type_ = entry.get("type")
-            if type_:
-                field_name += f" ({inline(type_)})"
-            lines.append(
-                rst_fields(field_name, sanitize(entry.get("doc", "")), level)
-            )
-        elif isinstance(entry, list):
-            lines.append(rst_list_inline(entry, level))
-        else:
-            lines.append(rst_bullet(inline(sanitize(entry)), level))
-
-    lines.append("\n")
-    return "\n".join(lines)
-
-
-def parse_definitions(defs: Dict[str, Any], namespace: str) -> str:
-    """Parse definitions section"""
-    preprocessed = ["name", "entries", "members"]
-    ignored = ["render-max"]  # This is not printed
-    lines = []
-
-    for definition in defs:
-        lines.append(rst_section(namespace, 'definition', definition["name"]))
-        for k in definition.keys():
-            if k in preprocessed + ignored:
-                continue
-            lines.append(rst_fields(k, sanitize(definition[k]), 0))
-
-        # Field list needs to finish with a new line
-        lines.append("\n")
-        if "entries" in definition:
-            lines.append(rst_paragraph(":entries:", 0))
-            lines.append(parse_entries(definition["entries"], 1))
-        if "members" in definition:
-            lines.append(rst_paragraph(":members:", 0))
-            lines.append(parse_entries(definition["members"], 1))
-
-    return "\n".join(lines)
-
-
-def parse_attr_sets(entries: List[Dict[str, Any]], namespace: str) -> str:
-    """Parse attribute from attribute-set"""
-    preprocessed = ["name", "type"]
-    linkable = ["enum", "nested-attributes", "struct", "sub-message"]
-    ignored = ["checks"]
-    lines = []
-
-    for entry in entries:
-        lines.append(rst_section(namespace, 'attribute-set', entry["name"]))
-        for attr in entry["attributes"]:
-            type_ = attr.get("type")
-            attr_line = attr["name"]
-            if type_:
-                # Add the attribute type in the same line
-                attr_line += f" ({inline(type_)})"
-
-            lines.append(rst_subsubsection(attr_line))
-
-            for k in attr.keys():
-                if k in preprocessed + ignored:
-                    continue
-                if k in linkable:
-                    value = rst_ref(namespace, k, attr[k])
-                else:
-                    value = sanitize(attr[k])
-                lines.append(rst_fields(k, value, 0))
-            lines.append("\n")
-
-    return "\n".join(lines)
-
-
-def parse_sub_messages(entries: List[Dict[str, Any]], namespace: str) -> str:
-    """Parse sub-message definitions"""
-    lines = []
-
-    for entry in entries:
-        lines.append(rst_section(namespace, 'sub-message', entry["name"]))
-        for fmt in entry["formats"]:
-            value = fmt["value"]
-
-            lines.append(rst_bullet(bold(value)))
-            for attr in ['fixed-header', 'attribute-set']:
-                if attr in fmt:
-                    lines.append(rst_fields(attr,
-                                            rst_ref(namespace, attr, fmt[attr]),
-                                            1))
-            lines.append("\n")
-
-    return "\n".join(lines)
-
-
-def parse_yaml(obj: Dict[str, Any]) -> str:
-    """Format the whole YAML into a RST string"""
-    lines = []
-
-    # Main header
-
-    lines.append(rst_header())
-
-    family = obj['name']
-
-    title = f"Family ``{family}`` netlink specification"
-    lines.append(rst_title(title))
-    lines.append(rst_paragraph(".. contents:: :depth: 3\n"))
-
-    if "doc" in obj:
-        lines.append(rst_subtitle("Summary"))
-        lines.append(rst_paragraph(obj["doc"], 0))
-
-    # Operations
-    if "operations" in obj:
-        lines.append(rst_subtitle("Operations"))
-        lines.append(parse_operations(obj["operations"]["list"], family))
-
-    # Multicast groups
-    if "mcast-groups" in obj:
-        lines.append(rst_subtitle("Multicast groups"))
-        lines.append(parse_mcast_group(obj["mcast-groups"]["list"]))
-
-    # Definitions
-    if "definitions" in obj:
-        lines.append(rst_subtitle("Definitions"))
-        lines.append(parse_definitions(obj["definitions"], family))
-
-    # Attributes set
-    if "attribute-sets" in obj:
-        lines.append(rst_subtitle("Attribute sets"))
-        lines.append(parse_attr_sets(obj["attribute-sets"], family))
-
-    # Sub-messages
-    if "sub-messages" in obj:
-        lines.append(rst_subtitle("Sub-messages"))
-        lines.append(parse_sub_messages(obj["sub-messages"], family))
-
-    return "\n".join(lines)
-
-
-# Main functions
-# ==============
 
+sys.path.append(pathlib.Path(__file__).resolve().parent.as_posix())
+from lib import YnlDocGenerator    # pylint: disable=C0413
 
 def parse_arguments() -> argparse.Namespace:
     """Parse arguments from user"""
@@ -367,9 +31,6 @@ def parse_arguments() -> argparse.Namespace:
 
     # Index and input are mutually exclusive
     group = parser.add_mutually_exclusive_group()
-    group.add_argument(
-        "-x", "--index", action="store_true", help="Generate the index page"
-    )
     group.add_argument("-i", "--input", help="YAML file name")
 
     args = parser.parse_args()
@@ -391,15 +52,6 @@ def parse_arguments() -> argparse.Namespace:
     return args
 
 
-def parse_yaml_file(filename: str) -> str:
-    """Transform the YAML specified by filename into an RST-formatted string"""
-    with open(filename, "r", encoding="utf-8") as spec_file:
-        yaml_data = yaml.safe_load(spec_file)
-        content = parse_yaml(yaml_data)
-
-    return content
-
-
 def write_to_rstfile(content: str, filename: str) -> None:
     """Write the generated content into an RST file"""
     logging.debug("Saving RST file to %s", filename)
@@ -408,35 +60,17 @@ def write_to_rstfile(content: str, filename: str) -> None:
         rst_file.write(content)
 
 
-def generate_main_index_rst(output: str) -> None:
-    """Generate the `networking_spec/index` content and write to the file"""
-    lines = []
-
-    lines.append(rst_header())
-    lines.append(rst_label("specs"))
-    lines.append(rst_title("Netlink Family Specifications"))
-    lines.append(rst_toctree(1))
-
-    index_dir = os.path.dirname(output)
-    logging.debug("Looking for .rst files in %s", index_dir)
-    for filename in sorted(os.listdir(index_dir)):
-        if not filename.endswith(".rst") or filename == "index.rst":
-            continue
-        lines.append(f"   {filename.replace('.rst', '')}\n")
-
-    logging.debug("Writing an index file at %s", output)
-    write_to_rstfile("".join(lines), output)
-
-
 def main() -> None:
     """Main function that reads the YAML files and generates the RST files"""
 
     args = parse_arguments()
 
+    parser = YnlDocGenerator()
+
     if args.input:
         logging.debug("Parsing %s", args.input)
         try:
-            content = parse_yaml_file(os.path.join(args.input))
+            content = parser.parse_yaml_file(os.path.join(args.input))
         except Exception as exception:
             logging.warning("Failed to parse %s.", args.input)
             logging.warning(exception)
@@ -444,10 +78,6 @@ def main() -> None:
 
         write_to_rstfile(content, args.output)
 
-    if args.index:
-        # Generate the index RST file
-        generate_main_index_rst(args.output)
-
 
 if __name__ == "__main__":
     main()