smb/client: annotate smberr.h with POSIX error codes

smb/client: annotate smberr.h with POSIX error codes

Annotate SMB1 error definitions in smberr.h with their corresponding
POSIX error codes.

To facilitate automated processing and ensure consistent formatting,
existing inline comments (/* ... */) in smberr.h were first moved to
the lines preceding the #define statements.

This provides the source data for generating sorted mapping tables,
allowing the implementation of binary search for faster error mapping
lookups in later commits.

The annotations were performed based on the manual
mapping_table_ERRDOS[] and mapping_table_ERRSRV[] arrays in
smb1maperror.c using the following python script:

	#!/usr/bin/env python3
	import re
	import os

	MAP_FILE = "fs/smb/client/smb1maperror.c"
	SMBERR_FILE = "fs/smb/client/smberr.h"

	def get_mappings():
	    mappings = {}
	    if not os.path.exists(MAP_FILE):
		return mappings
	    with open(MAP_FILE, "r") as f:
		content = f.read()
	    for table in ["mapping_table_ERRDOS", "mapping_table_ERRSRV"]:
		pattern = (
		    rf'static const struct smb_to_posix_error {table}\[\] = '
		    r'\{([\s\S]+?)\};'
		)
		match = re.search(pattern, content)
		if match:
		    entry_pattern = (
			r'\{\s*([A-Za-z0-9_]+)\s*,\s*'
			r'(-[A-Z0-9_]+)\s*\}'
		    )
		    entries = re.findall(entry_pattern, match.group(1))
		    for name, posix in entries:
			if name != "0":
			    mappings[name] = posix
	    return mappings

	def format_comment(comment_lines):
	    """
	    Formats comment lines to comply with Linux kernel coding style.
	    Single-line comments remain on one line.
	    Multi-line comments use the standard block format.
	    """
	    raw_text = []
	    for line in comment_lines:
		line = line.strip()
		if line.startswith('/*'):
		    line = line[2:]
		if line.endswith('*/'):
		    line = line[:-2]
		line = line.lstrip(' *').strip()
		if line:
		    raw_text.append(line)

	    if not raw_text:
		return []

	    # If it's a single line of text, keep it simple
	    if len(raw_text) == 1:
		return [f"/* {raw_text[0]} */"]

	    # Multi-line: Standard Kernel Block Comment Format
	    formatted = ["/*"]
	    for text in raw_text:
		formatted.append(f" * {text}")
	    formatted.append(" */")
	    return formatted

	def fix_content(content, mappings):
	    lines = content.splitlines()
	    new_lines, i = [], 0
	    while i < len(lines):
		line = lines[i]
		# Match #define with inline comment
		define_re = (
		    r'^(\s*#define\s+([A-Za-z0-9_]+)\s+'
		    r'[^\s/]+)\s*/\*'
		)
		match = re.match(define_re, line)
		if match:
		    prefix, name = match.group(1), match.group(2)

		    # Extract full comment block
		    comment_block = [line[line.find('/*'):].strip()]
		    if '*/' not in line:
			while i + 1 < len(lines):
			    i += 1
			    comment_block.append(lines[i].strip())
			    if '*/' in lines[i]:
				break

		    # Format and add comment
		    new_lines.extend(format_comment(comment_block))

		    # Add define with tab-separated POSIX code
		    new_define = prefix.rstrip()
		    if name in mappings:
			new_define += '\t// ' + mappings[name]
		    new_lines.append(new_define)
		else:
		    no_comment_re = (
			r'^(\s*#define\s+([A-Za-z0-9_]+)\s+'
			r'[^\s/]+)\s*$'
		    )
		    match_no_comment = re.match(no_comment_re, line)
		    if match_no_comment:
			prefix = match_no_comment.group(1)
			name = match_no_comment.group(2)
			new_define = prefix.rstrip()
			if name in mappings:
			    new_define += '\t// ' + mappings[name]
			new_lines.append(new_define)
		    else:
			new_lines.append(line)
		i += 1
	    return '\n'.join(new_lines)

	if __name__ == "__main__":
	    m = get_mappings()
	    if os.path.exists(SMBERR_FILE):
		with open(SMBERR_FILE, "r") as f:
		    content = f.read()
		fixed = fix_content(content, m)
		with open(SMBERR_FILE, "w") as f:
		    f.write(fixed + '\n')
		print(f"Successfully processed {SMBERR_FILE}")

Signed-off-by: Huiwen He <hehuiwen@kylinos.cn>
Reviewed-by: ChenXiaoSong <chenxiaosong@kylinos.cn>
Signed-off-by: Steve French <stfrench@microsoft.com>