linux-kernel - [PATCH v2 0/9] smb: improve search speed of SMB2 maperror

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Message-ID: <20251205042958.2658496-1-chenxiaosong.chenxiaosong@linux.dev>
Date: Fri,  5 Dec 2025 12:29:48 +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 v2 0/9] 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(),
3486 comparisons are needed.

After applying this patchset, only 10 comparisons are required.

v1: https://lore.kernel.org/linux-cifs/20251204045818.2590727-1-chenxiaosong.chenxiaosong@linux.dev/
v1->v2:
  - Patch #0001: update commit message: array has 1743 elements
  - Split into two patches: #0003 #0004
  - Patch #0009: update commit message
  - Do not move smb2maperror.c to common/

ChenXiaoSong (9):
  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: rename to STATUS_SMB_NO_PREAUTH_INTEGRITY_HASH_OVERLAP
  smb/client: 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

 fs/smb/Kconfig               |  13 +++
 fs/smb/client/cifsfs.c       |   2 +
 fs/smb/client/smb2maperror.c | 159 ++++++++++++++++++++++++++++-------
 fs/smb/client/smb2proto.h    |   1 +
 fs/smb/common/smb2status.h   |   5 +-
 fs/smb/server/smb2pdu.c      |   2 +-
 fs/smb/server/smb_common.h   |   6 +-
 7 files changed, 150 insertions(+), 38 deletions(-)

-- 
2.43.0