linux-kernel - [PATCH 00/30] smb: improve search speed of SMB1 maperror

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Message-ID: <20251208062100.3268777-1-chenxiaosong.chenxiaosong@linux.dev>
Date: Mon,  8 Dec 2025 14:20:30 +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,
	liuzhengyuan@...inos.cn,
	huhai@...inos.cn,
	liuyun01@...inos.cn,
	ChenXiaoSong <chenxiaosong@...inos.cn>
Subject: [PATCH 00/30] smb: improve search speed of SMB1 maperror

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

Before applying this patchset, the patchset ("smb: improve search speed of SMB2 maperror") must
be applied first, which introduces `CONFIG_SMB_KUNIT_TESTS` and avoids some conflicts in `fs/smb/client/cifsfs.c`:
https://chenxiaosong.com/lkml-improve-search-speed-of-smb2-maperror.html (Redirect to the LKML link)

When searching for the last element, the comparison counts are shown in the table below:

+--------------------+--------+--------+
|                    |Before  |After   |
|                    |Patchset|Patchset|
+--------------------+--------+--------+
| ntstatus_to_dos_map|   525  |    9   |
+--------------------+--------+--------+
|             nt_errs|   516  |    9   |
+--------------------+--------+--------+
|mapping_table_ERRDOS|    39  |    5   |
+--------------------+--------+--------+
|mapping_table_ERRSRV|    37  |    5   |
+--------------------+--------+--------+

ChenXiaoSong (30):
  smb/client: fix NT_STATUS_NO_DATA_DETECTED value
  smb/client: fix NT_STATUS_DEVICE_DOOR_OPEN value
  smb/client: fix NT_STATUS_UNABLE_TO_FREE_VM value
  smb/server: remove unused nterr.h
  smb/client: add 4 NT error code definitions
  smb/client: add parentheses to NT error code definitions containing
    bitwise OR operator
  smb/client: introduce DEFINE_CMP_FUNC()
  smb/client: sort ntstatus_to_dos_map array
  smb/client: create netmisc_test.c and introduce
    DEFINE_CHECK_SORT_FUNC()
  smb/client: introduce KUnit test to check sort result of
    ntstatus_to_dos_map array
  smb/client: introduce DEFINE_SEARCH_FUNC()
  smb/client: use bsearch() to find target in ntstatus_to_dos_map array
  smb/client: remove useless elements from ntstatus_to_dos_map array
  smb/client: introduce DEFINE_CHECK_SEARCH_FUNC()
  smb/client: introduce KUnit test to check search result of
    ntstatus_to_dos_map array
  smb/client: sort nt_errs array
  smb/client: introduce KUnit test to check sort result of nt_errs array
  smb/client: use bsearch() to find target in nt_errs array
  smb/client: remove useless elements from nt_errs array
  smb/client: introduce KUnit test to check search result of nt_errs
    array
  smb/client: sort mapping_table_ERRDOS array
  smb/client: introduce KUnit test to check sort result of
    mapping_table_ERRDOS array
  smb/client: use bsearch() to find target in mapping_table_ERRDOS array
  smb/client: remove useless elements from mapping_table_ERRDOS array
  smb/client: introduce KUnit test to check search result of
    mapping_table_ERRDOS array
  smb/client: sort mapping_table_ERRSRV array
  smb/client: introduce KUnit test to check sort result of
    mapping_table_ERRSRV array
  smb/client: use bsearch() to find target in mapping_table_ERRSRV array
  smb/client: remove useless elements from mapping_table_ERRSRV array
  smb/client: introduce KUnit test to check search result of
    mapping_table_ERRSRV array

 fs/smb/client/cifsfs.c       |    2 +
 fs/smb/client/cifsproto.h    |    1 +
 fs/smb/client/netmisc.c      |  155 ++++--
 fs/smb/client/netmisc_test.c |  114 ++++
 fs/smb/client/nterr.c        |   12 +-
 fs/smb/client/nterr.h        | 1017 +++++++++++++++++-----------------
 fs/smb/server/nterr.h        |  543 ------------------
 fs/smb/server/smb2misc.c     |    1 -
 fs/smb/server/smb_common.h   |    1 -
 9 files changed, 739 insertions(+), 1107 deletions(-)
 create mode 100644 fs/smb/client/netmisc_test.c
 delete mode 100644 fs/smb/server/nterr.h

-- 
2.43.0