linux-kernel - Re: [PATCH 0/8] target-iSCSI: Adjustments for several function implementations

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Date:   Wed, 21 Feb 2018 17:45:35 +0100
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     target-devel@...r.kernel.org, linux-scsi@...r.kernel.org,
        Al Viro <viro@...iv.linux.org.uk>,
        Arun Easi <arun.easi@...ium.com>,
        Bart Van Assche <bart.vanassche@...disk.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        David Disseldorp <ddiss@...e.de>,
        Hannes Reinecke <hare@...e.com>,
        Ingo Molnar <mingo@...nel.org>,
        "Jason A. Donenfeld" <Jason@...c4.com>,
        Jiang Yi <jiangyilism@...il.com>,
        Kees Cook <keescook@...omium.org>,
        "Nicholas A. Bellinger" <nab@...ux-iscsi.org>,
        Russell King <rmk+kernel@...linux.org.uk>,
        Tang Wenji <tang.wenji@....com.cn>,
        Theodore Ts'o <tytso@....edu>,
        Varun Prakash <varun@...lsio.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 0/8] target-iSCSI: Adjustments for several function
 implementations

> Date: Tue, 12 Dec 2017 22:22:11 +0100
> 
> Some update suggestions were taken into account
> from static source code analysis.
> 
> Markus Elfring (8):
>   Less function calls in chap_server_compute_md5() after error detection
>   Move resetting of seven variables in chap_server_compute_md5()
>   Delete 36 error messages for a failed memory allocation
>   Delete an unnecessary variable initialisation in iscsit_allocate_ooo_cmdsn()
>   Delete an unnecessary variable initialisation in iscsi_copy_param_list()
>   Delete an unnecessary variable initialisation in iscsi_create_default_params()
>   Delete an unnecessary variable initialisation in iscsi_set_default_param()
>   Improve 16 size determinations
> 
>  drivers/target/iscsi/iscsi_target.c               |   2 -
>  drivers/target/iscsi/iscsi_target_auth.c          | 110 +++++++++++-----------
>  drivers/target/iscsi/iscsi_target_datain_values.c |   6 +-
>  drivers/target/iscsi/iscsi_target_erl1.c          |  14 +--
>  drivers/target/iscsi/iscsi_target_erl2.c          |   8 +-
>  drivers/target/iscsi/iscsi_target_login.c         |  29 ++----
>  drivers/target/iscsi/iscsi_target_nego.c          |   4 +-
>  drivers/target/iscsi/iscsi_target_parameters.c    |  58 +++++-------
>  drivers/target/iscsi/iscsi_target_seq_pdu_list.c  |  34 +++----
>  drivers/target/iscsi/iscsi_target_tpg.c           |  13 +--
>  drivers/target/iscsi/iscsi_target_util.c          |  11 +--
>  11 files changed, 118 insertions(+), 171 deletions(-)

One of these update suggestions resulted in the commit “target: avoid NULL
dereference in CHAP auth error path” which is considered for integration
into Linux stable versions now.
https://patchwork.kernel.org/patch/10110459/
https://lkml.kernel.org/r/<20171213172230.12767-1-ddiss@...e.de>
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/target/iscsi/iscsi_target_auth.c?id=ce512d79d0466a604793addb6b769d12ee326822


Now I am curious if more remaining change possibilities can be picked up
from this patch series.

* Would you like to improve any more implementation details?

* Do you need additional explanations for further benefits?

Regards,
Markus