linux-kernel - [PATCH 00/10] smb: improve search speed of SMB2 maperror

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Message-ID: <20251204045818.2590727-1-chenxiaosong.chenxiaosong@linux.dev>
Date: Thu,  4 Dec 2025 12:58:08 +0800
From: chenxiaosong.chenxiaosong@...ux.dev
To: sfrench@...ba.org,
	smfrench@...il.com,
	linkinjeon@...nel.org,
	linkinjeon@...ba.org
Cc: linux-cifs@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	chenxiaosong@...nxiaosong.com,
	ChenXiaoSong <chenxiaosong@...inos.cn>
Subject: [PATCH 00/10] smb: improve search speed of SMB2 maperror

From: ChenXiaoSong <chenxiaosong@...inos.cn>

Before applying this patchset, when searching for the last element of
smb2_error_map_table array and calling smb2_print_status(),
3480 comparisons are needed.

After applying this patchset, only 10 comparisons are required.

ChenXiaoSong (10):
  smb/client: reduce loop count in map_smb2_to_linux_error() by half
  smb/client: remove unused elements from smb2_error_map_table array
  smb: add two elements to smb2_error_map_table array
  smb/client: sort smb2_error_map_table array
  smb/client: use bsearch() to find target status code
  smb/client: introduce smb2_get_err_map()
  smb/client: introduce smb2maperror KUnit tests
  smb/server: rename include guard in smb_common.h
  smb: create common/common.h and common/common.c
  smb: move client/smb2maperror.c to common/

 fs/smb/Kconfig                           |  13 ++
 fs/smb/client/Makefile                   |   2 +-
 fs/smb/client/smb2misc.c                 |  44 ++++++
 fs/smb/client/smbencrypt.c               |   2 +-
 fs/smb/common/Makefile                   |   3 +-
 fs/smb/common/cifs_md4.c                 |   5 +-
 fs/smb/common/common.c                   |  30 ++++
 fs/smb/common/{md4.h => common.h}        |  27 +++-
 fs/smb/{client => common}/smb2maperror.c | 173 ++++++++++++++---------
 fs/smb/common/smb2status.h               |   5 +-
 fs/smb/server/smb2pdu.c                  |   2 +-
 fs/smb/server/smb_common.h               |   6 +-
 12 files changed, 227 insertions(+), 85 deletions(-)
 create mode 100644 fs/smb/common/common.c
 rename fs/smb/common/{md4.h => common.h} (60%)
 rename fs/smb/{client => common}/smb2maperror.c (97%)

-- 
2.43.0