[PATCHv3 0/5] FWU: Handle meta-data in common code

[Jassi Brar]

On Wed, Jan 18, 2023 at 7:28 AM Michal Simek <michal.simek at amd.com> wrote:
>
> Hi,
>
> On 1/2/23 19:25, Jassi Brar wrote:
> > The patchset reduces ~400 lines of code, while keeping the functionality same and making
> > meta-data operations much faster (by using cached structures).
> >
> > Issue:
> >   meta-data copies (primary and secondary) are being handled by the backend/storage layer
> > instead of the common core in fwu.c (as also noted by Ilias)  that is, gpt_blk.c manages
> > meta-data and similarly raw_mtd.c will have to do the same when it arrives. The code
> > could by make smaller, cleaner and optimised.
> >
> > Basic idea:
> >   Introduce  .read_mdata() and .write_mdata() in fwu_mdata_ops  that simply read/write
> > meta-data copy. The core code takes care of integrity and redundancy of the meta-data,
> > as a result we can get rid of every other callback .get_mdata() .update_mdata()
> > .get_mdata_part_num()  .read_mdata_partition()  .write_mdata_partition() and the
> > corresponding wrapper functions thereby making the code 100s of LOC smaller.
> >
> > Get rid of fwu_check_mdata_validity() and fwu_mdata_check() which expected underlying
> > layer to manage and verify mdata copies.
> > Implement  fwu_get_verified_mdata(struct fwu_mdata *mdata) public function that reads,
> > verifies and, if needed, fixes the meta-data copies.
> >
> > Verified copy of meta-data is now cached as 'g_mdata' in fwu.c, which avoids multiple
> > low-level expensive read and parse calls.
> > gpt meta-data partition numbers are now cached in gpt_blk.c, so that we don't have to do expensive part_get_info() and uid ops.
>
> First of all I have strong suspicious that this series are pretty much two
> series at once.
>
Yes, I submitted two patchsets.
1) Optimizing the api of current fwu.
2) Introduce support for mtd backed storage (DeveloperBox platform as
an instance) using the new api.

They appear just fine in my inbox. Do they appear bad to you?

>
> The second issue is that you are sending patches from
> Jassi Brar <jassisinghbrar at gmail.com>
> but SOB is
> Signed-off-by: Jassi Brar <jaswinder.singh at linaro.org>
>
> And Tom said in past that they should match. There is a hook for it to check it
> which everybody should be using. That's why please fix this in the next series.
>
I have submitted dozens of patches and pull requests over the last
many years. This never occurred to anybody.
BTW, the 'Author' and 'Signed-off-by' appear consistent in git log.
And there are very recent instances in uboot git log where even they
actually differ.

But if Tom really wants, I am happy to send-email from my other account.

Thanks.