Add support for transfer list version 3, which allows us to
verify the status of each command and resume an interrupted
block based OTA update. Notes on the changes:
- Move the previous BlockImageUpdateFn to a shorter and
reusable PerformBlockImageUpdate, which can be used also
in BlockImageVerifyFn for verification.
- Split individual transfer list commands into separate
functions with unified parameters for clarity, and use
a hash table to locate them during execution.
- Move common block reading and writing to ReadBlocks and
WriteBlocks to reduce code duplication, and rename the
readblock and writeblock to less confusing read_all and
write_all.
The coding style of the new functions follows the existing
style in the updater/edify code.
Needs matching changes from
Ia5c56379f570047f10f0aa7373a1025439495c98
Bug: 18262110
Change-Id: I1e752464134aeb2d396946348e6041acabe13942
In version 2 of block image diffs, we support a new command to load
data from the image and store it in the "stash table" and then
subsequently use entries in the stash table to fill in missing bits of
source data we're not allowed to read when doing move/bsdiff/imgdiff
commands.
This leads to smaller update packages because we can break cycles in
the ordering of how pieces are updated by storing data away and using
it later, rather than not using the data as input to the patch system
at all. This comes at the cost of the RAM or scratch disk needed to
store the data.
The implementation is backwards compatible; it can still handle the
existing version 1 of the transfer file format.
Change-Id: I7fafe741d86b92d82d46feb2939ecf5a3890dc64
Otherwise, overflow problems can occur with images larger than
2G since the offsets will overflow a 32-bit off_t.
Change-Id: I05951a38ebeae83ad2cb938594e8d8adb323e2aa
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
The computation of file offsets was overflowing for partitions larger
than 2 GB. The parsing of the transfer file could fail at the end if
the data happened to not be properly null-terminated.
Bug: 16984795
Change-Id: I3ce6eb3e54ab7b55aa9bbed252da5a7eacd3317a
