On Wed, 9 Nov 2022 at 00:05, Daniel Golle <daniel@xxxxxxxxxxxxxx> wrote:
>
> Add new GUID allowing to parse uImage.FIT stored in a GPT partition
> and map filesystem sub-image as sub-partitions.
>
> Signed-off-by: Daniel Golle <daniel@xxxxxxxxxxxxxx>
I'm not sure I follow the logic here.
You are adding uImage.FIT support as a pseudo-partition type right?
And the only partition driver that supports it is GPT?
Does that mean that all the other types would need a similar change to
be able to detect these subvolumes?
> ---
> block/partitions/efi.c | 9 +++++++++
> block/partitions/efi.h | 3 +++
> 2 files changed, 12 insertions(+)
>
> diff --git a/block/partitions/efi.c b/block/partitions/efi.c
> index 5e9be13a56a8..bf87893eabe4 100644
> --- a/block/partitions/efi.c
> +++ b/block/partitions/efi.c
> @@ -716,6 +716,9 @@ int efi_partition(struct parsed_partitions *state)
> gpt_entry *ptes = NULL;
> u32 i;
> unsigned ssz = queue_logical_block_size(state->disk->queue) / 512;
> +#ifdef CONFIG_FIT_PARTITION
> + u32 extra_slot = 65;
> +#endif
>
> if (!find_valid_gpt(state, &gpt, &ptes) || !gpt || !ptes) {
> kfree(gpt);
> @@ -749,6 +752,12 @@ int efi_partition(struct parsed_partitions *state)
> ARRAY_SIZE(ptes[i].partition_name));
> utf16_le_to_7bit(ptes[i].partition_name, label_max, info->volname);
> state->parts[i + 1].has_info = true;
> + /* If this is a U-Boot FIT volume it may have subpartitions */
> +#ifdef CONFIG_FIT_PARTITION
> + if (!efi_guidcmp(ptes[i].partition_type_guid, PARTITION_LINUX_FIT_GUID))
> + (void) parse_fit_partitions(state, start * ssz, size * ssz,
> + &extra_slot, 127, 1);
> +#endif
> }
> kfree(ptes);
> kfree(gpt);
> diff --git a/block/partitions/efi.h b/block/partitions/efi.h
> index 84b9f36b9e47..06c11f6ae398 100644
> --- a/block/partitions/efi.h
> +++ b/block/partitions/efi.h
> @@ -51,6 +51,9 @@
> #define PARTITION_LINUX_LVM_GUID \
> EFI_GUID( 0xe6d6d379, 0xf507, 0x44c2, \
> 0xa2, 0x3c, 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28)
> +#define PARTITION_LINUX_FIT_GUID \
> + EFI_GUID( 0xcae9be83, 0xb15f, 0x49cc, \
> + 0x86, 0x3f, 0x08, 0x1b, 0x74, 0x4a, 0x2d, 0x93)
>
> typedef struct _gpt_header {
> __le64 signature;
> --
> 2.38.1
>
