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fwu: add helper to get image GUID by type and bank index

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Introduce fwu_mdata_get_image_guid() to retrieve a specific image GUID
from the FWU metadata based on the bank index and image type GUID.

This allows identifying the correct partition in multi-bank (A/B)
scenarios, ensuring the correct image is targeted depending on the
current bank.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Dario Binacchi
2026-04-30 10:06:07 +02:00
committed by Patrice Chotard
parent 2dc71c48bf
commit 97cdde6dfa
2 changed files with 44 additions and 0 deletions
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33
lib/fwu_updates/fwu.c
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@@ -243,6 +243,39 @@ int fwu_sync_mdata(struct fwu_mdata *mdata, int part)
return 0;
}
/**
* fwu_mdata_get_image_guid() - Get image GUID for a type and bank
* @image_guid: Pointer to be filled with the found image GUID
* @image_type_guid: Pointer to the image type GUID to search for
* @bank_index: Index of the bank
*
* Return: 0 if OK, -ve on error
*/
int fwu_mdata_get_image_guid(efi_guid_t *image_guid,
const efi_guid_t *image_type_guid, u32 bank_index)
{
struct fwu_data *data = &g_fwu_data;
struct fwu_image_entry *image;
int i;
if (bank_index >= data->num_banks)
return -EINVAL;
for (i = 0; i < data->num_images; i++) {
image = &data->fwu_images[i];
if (!guidcmp(image_type_guid, &image->image_type_guid)) {
struct fwu_image_bank_info *bank;
bank = &image->img_bank_info[bank_index];
guidcpy(image_guid, &bank->image_guid);
return 0;
}
}
return -ENOENT;
}
/**
* fwu_mdata_copies_allocate() - Allocate memory for metadata
* @mdata_size: Size of the metadata structure