robur/opam-mirror
4
0
Fork 0
Code Issues 6 Pull requests 2 Projects Releases Packages Wiki Activity Actions

Fix sector alignment bug in formatting

Browse source
This commit is contained in:
Reynir Björnsson 2024-10-10 10:31:58 +02:00
parent 068c640dac
commit 30266f4e09
1 changed files with 15 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

22
mirage/partitions.ml
View file

@ -175,15 +175,23 @@ module Make(BLOCK : Mirage_block.S) = struct
write block 0L [ buf ]
in
(* Format the file systems by writing zeroes *)
let zeroes = Cstruct.create (max (2 * Tar.Header.length) sector_size) in
(* For tar we need to zero (at least) the first 2*512 bytes so we round up
to the nearest sector alignment *)
let zeroes =
let sectors =
(2 * Tar.Header.length + sector_size - 1) / sector_size * sector_size
in
Cstruct.create sectors in
let*? () =
write block tar.starting_lba [ Cstruct.sub zeroes 0 (2 * Tar.Header.length) ]
write block tar.starting_lba [ zeroes ]
in
(* For the OneFFS filesystems we just need to zero out the first sector *)
let zero_sector = Cstruct.create sector_size in
let*? () =
write block git_dump.starting_lba [ zero_sector ]
in
let*? () =
write block git_dump.starting_lba [ Cstruct.sub zeroes 0 sector_size ]
write block md5s.starting_lba [ zero_sector ]
in
let*? () =
write block md5s.starting_lba [ Cstruct.sub zeroes 0 sector_size ]
in
write block sha512s.starting_lba [ Cstruct.sub zeroes 0 sector_size ]
write block sha512s.starting_lba [ zero_sector ]
end