From: Jassi Brar jaswinder.singh@linaro.org
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.
Changes since v1: * Fix typos and misc cosmetic changes * Catch error returns
Jassi Brar (4): fwu: gpt: use cached meta-data partition numbers fwu: move meta-data management in core fwu: gpt: implement read_mdata and write_mdata callbacks fwu: meta-data: switch to management by common code
cmd/fwu_mdata.c | 17 +- drivers/fwu-mdata/fwu-mdata-uclass.c | 151 +------------- drivers/fwu-mdata/gpt_blk.c | 175 +++++----------- include/fwu.h | 198 ++---------------- lib/fwu_updates/fwu.c | 300 ++++++++++++--------------- 5 files changed, 214 insertions(+), 627 deletions(-)