APPLIED: [PATCH v1 0/1] [SRU][F:linux-bluefield][PATCH 1/1] UBUNTU: SAUCE: Fix the rshim logging buffer full/wraparound issue

[Tim Gardner]

Applied to focal/linux-bluefield-master-next. Thanks.

Fixed BugLink.

-rtg

On 3/17/21 5:44 PM, Liming Sun wrote:
> Buglink: https://bugs.launchpad.net/bugs/1919847
> 
> SRU Justification:
> 
> [Impact]
> * When 'cat /dev/rshim0/misc' with DISPLAY_LEVEL set to 2, the logging
>    buffer could be potentially displayed as empty when it's full.
> 
> [Fix]
> * Add the check properly to make sure the buffer won't wrap-around.
> 
> [Test Case]
> * Run "bfrshlog <some-message>" repeatedly and check the
>    /dev/rshim0/misc with DISPLAY_LEVEL set to 2 in this file. The
>    buffer shouldn't be overwritten or wrap-around.
> 
> [Regression Potential]
> * Yes, it should be easy to add regression by using the bfrshlog to
>    add logs on BlueField side, and check the logging buffer
>    (/dev/rshim0/misc) from external rshim host.
> 
> [Other]
> * N/A
> 

-- 
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Tim Gardner
Canonical, Inc