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image: shrink_filesystem(): align file end to 4096b

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otherwise fastboot seems to get upset
This commit is contained in:
InsanePrawn 2023-04-30 07:08:07 +02:00
parent de76641fa1
commit efe4bf085d
1 changed files with 8 additions and 1 deletions
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9
image/image.py
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@ -69,6 +69,13 @@ def get_fs_size(partition: str) -> tuple[int, int]:
return fs_blocks, fs_block_size
def align_bytes(size_bytes: int, alignment: int = 4096) -> int:
rest = size_bytes % alignment
if rest:
size_bytes += alignment - rest
return size_bytes
def shrink_fs(loop_device: str, file: str, sector_size: int):
partprobe(loop_device)
logging.debug(f"Checking filesystem at {loop_device}p2")
@ -130,7 +137,7 @@ def shrink_fs(loop_device: str, file: str, sector_size: int):
if end_sector == 0:
raise Exception(f'Failed to find end sector of {loop_device}p2')
end_size = (end_sector + 1) * sector_size
end_size = align_bytes((end_sector + 1) * sector_size, 4096)
logging.debug(f'({end_sector} + 1) sectors * {sector_size} bytes/sector = {end_size} bytes')
logging.info(f'Truncating {file} to {end_size} bytes')