Re: [PATCH v1 10/12] dyndbg: add processing of T(race) flag argument

[jim . cromie]

On Fri, Nov 3, 2023 at 7:10 AM Łukasz Bartosik <lb@xxxxxxxxxxxx> wrote:
>
> Add processing of argument provided to T(race) flag.
> The argument value determines destination of debug logs:
>
> 0 - debug logs will be written to prdbg and devdbg trace events
> [1..255] - debug logs will be written to trace instance
>
> A user can provide trace destination by folowing T flag with
> ":" and trace destination value in range [0..255], for example:
>
> echo "module thunderbolt =pT:7" > /sys/kernel/debug/dynamic_debug/control
> echo "module thunderbolt =lT:7,p" > /sys/kernel/debug/dynamic_debug/control
>
> When T flag with argument is followed by other flags then the next flag has
> to be preceded with ",".
>

the trailing , seems punctuation heavy.
Could we just stipulate that any :string  (leading : trailing anything)
be the last flag in the spec ?
bare T flags are not constrained otherwise.
seems fine as API-spec-by-error-codes.




> When no value is provided trace destination defaults to 0, for example:
>
> echo "module thunderbolt =T" > /sys/kernel/debug/dynamic_debug/control
> echo "module thunderbolt =lTp" > /sys/kernel/debug/dynamic_debug/control

no colon after T means p is a flag, not a destination name