[RFC PATCH 04/10] FWU: Add metadata access functions for GPT partitioned block devices
Patrick DELAUNAY
patrick.delaunay at foss.st.com
Tue Dec 7 15:23:54 CET 2021
Hi Sughsoh,
On 11/25/21 8:01 AM, Sughosh Ganu wrote:
> In the FWU Multi Bank Update feature, the information about the
> updatable images is stored as part of the metadata, on a separate
> partition. Add functions for reading from and writing to the metadata
> when the updatable images and the metadata are stored on a block
> device which is formated with GPT based partition scheme.
>
> Signed-off-by: Sughosh Ganu <sughosh.ganu at linaro.org>
> ---
> lib/fwu_updates/fwu_metadata_gpt_blk.c | 716 +++++++++++++++++++++++++
> 1 file changed, 716 insertions(+)
> create mode 100644 lib/fwu_updates/fwu_metadata_gpt_blk.c
>
> diff --git a/lib/fwu_updates/fwu_metadata_gpt_blk.c b/lib/fwu_updates/fwu_metadata_gpt_blk.c
> new file mode 100644
> index 0000000000..98cc53f706
> --- /dev/null
> +++ b/lib/fwu_updates/fwu_metadata_gpt_blk.c
> @@ -0,0 +1,716 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Copyright (c) 2021, Linaro Limited
> + */
> +
> +#include <blk.h>
> +#include <efi_loader.h>
> +#include <fwu_metadata.h>
> +#include <malloc.h>
> +#include <memalign.h>
> +#include <part.h>
> +#include <part_efi.h>
> +
> +#include <linux/errno.h>
> +#include <linux/types.h>
> +#include <u-boot/crc.h>
> +
> +#define PRIMARY_VALID 0x1
> +#define SECONDARY_VALID 0x2
> +
> +#define MDATA_READ (u8)0x1
> +#define MDATA_WRITE (u8)0x2
> +
> +#define IMAGE_ACCEPT_SET (u8)0x1
> +#define IMAGE_ACCEPT_CLEAR (u8)0x2
> +
> +static int gpt_verify_metadata(struct fwu_metadata *metadata, bool pri_part)
> +{
> + u32 calc_crc32;
> + void *buf;
> +
> + buf = &metadata->version;
> + calc_crc32 = crc32(0, buf, sizeof(*metadata) - sizeof(u32));
> +
> + if (calc_crc32 != metadata->crc32) {
> + log_err("crc32 check failed for %s metadata partition\n",
> + pri_part ? "primary" : "secondary");
> + return -1;
> + }
> +
> + return 0;
> +}
> +
> +static int gpt_get_metadata_partitions(struct blk_desc *desc,
> + u32 *primary_mpart,
> + u32 *secondary_mpart)
> +{
> + int i, ret;
> + u32 nparts, mparts;
> + gpt_entry *gpt_pte = NULL;
> + const efi_guid_t fwu_metadata_guid = FWU_METADATA_GUID;
> +
> + ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1,
> + desc->blksz);
> +
> + ret = get_gpt_hdr_parts(desc, gpt_head, &gpt_pte);
> + if (ret < 0) {
> + log_err("Error getting GPT header and partitions\n");
> + ret = -EIO;
> + goto out;
> + }
> +
> + nparts = gpt_head->num_partition_entries;
> + for (i = 0, mparts = 0; i < nparts; i++) {
> + if (!guidcmp(&fwu_metadata_guid,
> + &gpt_pte[i].partition_type_guid)) {
> + ++mparts;
> + if (!*primary_mpart)
> + *primary_mpart = i + 1;
> + else
> + *secondary_mpart = i + 1;
> + }
> + }
> +
> + if (mparts != 2) {
> + log_err("Expect two copies of the metadata instead of %d\n",
> + mparts);
> + ret = -EINVAL;
> + } else {
> + ret = 0;
> + }
> +out:
> + free(gpt_pte);
> +
> + return ret;
> +}
> +
> +static int gpt_get_metadata_disk_part(struct blk_desc *desc,
> + struct disk_partition *info,
> + u32 part_num)
> +{
> + int ret;
> + char *metadata_guid_str = "8a7a84a0-8387-40f6-ab41-a8b9a5a60d23";
> +
> + ret = part_get_info(desc, part_num, info);
> + if (ret < 0) {
> + log_err("Unable to get the partition info for the metadata part %d",
> + part_num);
> + return -1;
> + }
> +
> + /* Check that it is indeed the metadata partition */
> + if (!strncmp(info->type_guid, metadata_guid_str, UUID_STR_LEN)) {
> + /* Found the metadata partition */
> + return 0;
> + }
> +
> + return -1;
> +}
> +
> +static int gpt_read_write_metadata(struct blk_desc *desc,
> + struct fwu_metadata *metadata,
> + u8 access, u32 part_num)
> +{
> + int ret;
> + u32 len, blk_start, blkcnt;
> + struct disk_partition info;
> +
> + ALLOC_CACHE_ALIGN_BUFFER_PAD(struct fwu_metadata, mdata, 1, desc->blksz);
> +
> + ret = gpt_get_metadata_disk_part(desc, &info, part_num);
> + if (ret < 0) {
> + printf("Unable to get the metadata partition\n");
> + return -ENODEV;
> + }
> +
> + len = sizeof(*metadata);
> + blkcnt = BLOCK_CNT(len, desc);
> + if (blkcnt > info.size) {
> + log_err("Block count exceeds metadata partition size\n");
> + return -ERANGE;
> + }
> +
> + blk_start = info.start;
> + if (access == MDATA_READ) {
> + if (blk_dread(desc, blk_start, blkcnt, mdata) != blkcnt) {
> + log_err("Error reading metadata from the device\n");
> + return -EIO;
> + }
> + memcpy(metadata, mdata, sizeof(struct fwu_metadata));
> + } else {
> + if (blk_dwrite(desc, blk_start, blkcnt, metadata) != blkcnt) {
> + log_err("Error writing metadata to the device\n");
> + return -EIO;
> + }
> + }
> +
> + return 0;
> +}
> +
> +static int gpt_read_metadata(struct blk_desc *desc,
> + struct fwu_metadata *metadata, u32 part_num)
> +{
> + return gpt_read_write_metadata(desc, metadata, MDATA_READ, part_num);
> +}
> +
> +static int gpt_write_metadata_partition(struct blk_desc *desc,
> + struct fwu_metadata *metadata,
> + u32 part_num)
> +{
> + return gpt_read_write_metadata(desc, metadata, MDATA_WRITE, part_num);
> +}
> +
> +static int gpt_update_metadata(struct fwu_metadata *metadata)
> +{
> + int ret;
> + struct blk_desc *desc;
> + u32 primary_mpart, secondary_mpart;
> +
> + ret = fwu_plat_get_blk_desc(&desc);
> + if (ret < 0) {
> + log_err("Block device not found\n");
> + return -ENODEV;
> + }
> +
> + primary_mpart = secondary_mpart = 0;
> + ret = gpt_get_metadata_partitions(desc, &primary_mpart,
> + &secondary_mpart);
> +
> + if (ret < 0) {
> + log_err("Error getting the metadata partitions\n");
> + return -ENODEV;
> + }
> +
> + /* First write the primary partition*/
> + ret = gpt_write_metadata_partition(desc, metadata, primary_mpart);
> + if (ret < 0) {
> + log_err("Updating primary metadata partition failed\n");
> + return ret;
> + }
> +
> + /* And now the replica */
> + ret = gpt_write_metadata_partition(desc, metadata, secondary_mpart);
> + if (ret < 0) {
> + log_err("Updating secondary metadata partition failed\n");
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static int gpt_get_valid_metadata(struct fwu_metadata **metadata)
> +{
> + int ret;
> + struct blk_desc *desc;
> + u32 primary_mpart, secondary_mpart;
> +
> + ret = fwu_plat_get_blk_desc(&desc);
> + if (ret < 0) {
> + log_err("Block device not found\n");
> + return -ENODEV;
> + }
> +
> + primary_mpart = secondary_mpart = 0;
> + ret = gpt_get_metadata_partitions(desc, &primary_mpart,
> + &secondary_mpart);
> +
> + if (ret < 0) {
> + log_err("Error getting the metadata partitions\n");
> + return -ENODEV;
> + }
> +
> + *metadata = malloc(sizeof(struct fwu_metadata));
> + if (!*metadata) {
> + log_err("Unable to allocate memory for reading metadata\n");
> + return -ENOMEM;
> + }
> +
> + ret = gpt_read_metadata(desc, *metadata, primary_mpart);
> + if (ret < 0) {
> + log_err("Failed to read the metadata from the device\n");
> + return -EIO;
> + }
> +
> + ret = gpt_verify_metadata(*metadata, 1);
> + if (!ret)
> + return 0;
> +
> + /*
> + * Verification of the primary metadata copy failed.
> + * Try to read the replica.
> + */
> + memset(*metadata, 0, sizeof(struct fwu_metadata));
> + ret = gpt_read_metadata(desc, *metadata, secondary_mpart);
> + if (ret < 0) {
> + log_err("Failed to read the metadata from the device\n");
> + return -EIO;
> + }
> +
> + ret = gpt_verify_metadata(*metadata, 0);
> + if (!ret)
> + return 0;
> +
> + /* Both the metadata copies are corrupted. */
> + return -1;
> +}
> +
> +static int gpt_check_metadata_validity(void)
> +{
> + int ret;
> + struct blk_desc *desc;
> + struct fwu_metadata *pri_metadata;
> + struct fwu_metadata *secondary_metadata;
> + u32 primary_mpart, secondary_mpart;
> + u32 valid_partitions;
> +
> + ret = fwu_plat_get_blk_desc(&desc);
> + if (ret < 0) {
> + log_err("Block device not found\n");
> + return -ENODEV;
> + }
> +
> + /*
> + * Two metadata partitions are expected.
> + * If we don't have two, user needs to create
> + * them first
> + */
> + primary_mpart = secondary_mpart = 0;
> + valid_partitions = 0;
> + ret = gpt_get_metadata_partitions(desc, &primary_mpart,
> + &secondary_mpart);
> +
> + if (ret < 0) {
> + log_err("Error getting the metadata partitions\n");
> + return -ENODEV;
> + }
> +
> + pri_metadata = malloc(sizeof(*pri_metadata));
> + if (!pri_metadata) {
> + log_err("Unable to allocate memory for reading metadata\n");
> + return -ENOMEM;
> + }
> +
> + secondary_metadata = malloc(sizeof(*secondary_metadata));
> + if (!secondary_metadata) {
> + log_err("Unable to allocate memory for reading metadata\n");
> + return -ENOMEM;
> + }
> +
> + ret = gpt_read_metadata(desc, pri_metadata, primary_mpart);
> + if (ret < 0) {
> + log_err("Failed to read the metadata from the device\n");
> + ret = -EIO;
> + goto out;
> + }
> +
> + ret = gpt_verify_metadata(pri_metadata, 1);
> + if (!ret)
> + valid_partitions |= PRIMARY_VALID;
> +
> + /* Now check the secondary partition */
> + ret = gpt_read_metadata(desc, secondary_metadata, secondary_mpart);
> + if (ret < 0) {
> + log_err("Failed to read the metadata from the device\n");
> + ret = -EIO;
> + goto out;
> + }
> +
> + ret = gpt_verify_metadata(secondary_metadata, 0);
> + if (!ret)
> + valid_partitions |= SECONDARY_VALID;
> +
> + if (valid_partitions == (PRIMARY_VALID | SECONDARY_VALID)) {
> + ret = -1;
> + /*
> + * Before returning, check that both the
> + * metadata copies are the same. If not,
> + * the metadata copies need to be
> + * re-populated.
> + */
> + if (!memcmp(pri_metadata, secondary_metadata,
> + sizeof(*pri_metadata)))
> + ret = 0;
> + goto out;
> + } else if (valid_partitions == SECONDARY_VALID) {
> + ret = gpt_write_metadata_partition(desc, secondary_metadata,
> + primary_mpart);
> + if (ret < 0) {
> + log_err("Restoring primary metadata partition failed\n");
> + goto out;
> + }
> + } else if (valid_partitions == PRIMARY_VALID) {
> + ret = gpt_write_metadata_partition(desc, pri_metadata,
> + secondary_mpart);
> + if (ret < 0) {
> + log_err("Restoring secondary metadata partition failed\n");
> + goto out;
> + }
> + } else {
> + ret = -1;
> + }
> +
> +out:
> + free(pri_metadata);
> +
> + return ret;
> +}
> +
> +static int gpt_fill_partition_guid_array(struct blk_desc *desc,
> + efi_guid_t **part_guid_arr,
> + u32 *nparts)
> +{
> + int ret, i;
> + u32 parts;
> + gpt_entry *gpt_pte = NULL;
> + const efi_guid_t null_guid = NULL_GUID;
> +
> + ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1,
> + desc->blksz);
> +
> + ret = get_gpt_hdr_parts(desc, gpt_head, &gpt_pte);
> + if (ret < 0) {
> + log_err("Error getting GPT header and partitions\n");
> + ret = -EIO;
> + goto out;
> + }
> +
> + *nparts = gpt_head->num_partition_entries;
> +
> + /*
> + * There could be a scenario where the number of partition entries
> + * configured in the GPT header is the default value of 128. Find
> + * the actual number of populated partitioned entries
> + */
> + for (i = 0, parts = 0; i < *nparts; i++) {
> + if (!guidcmp(&gpt_pte[i].partition_type_guid, &null_guid))
> + continue;
> + ++parts;
> + }
> +
> + *nparts = parts;
> + *part_guid_arr = malloc(sizeof(efi_guid_t) * *nparts);
> + if (!part_guid_arr) {
> + log_err("Unable to allocate memory for guid array\n");
> + ret = -ENOMEM;
> + goto out;
> + }
> +
> + for (i = 0; i < *nparts; i++) {
> + guidcpy((*part_guid_arr + i),
> + &gpt_pte[i].partition_type_guid);
> + }
> +
> +out:
> + free(gpt_pte);
> + return ret;
> +}
> +
> +int fwu_gpt_get_active_index(u32 *active_idx)
> +{
> + int ret;
> + struct fwu_metadata *metadata;
> +
> + ret = gpt_get_valid_metadata(&metadata);
> + if (ret < 0) {
> + log_err("Unable to get valid metadata\n");
> + goto out;
> + }
> +
> + /*
> + * Found the metadata partition, now read the active_index
> + * value
> + */
> + *active_idx = metadata->active_index;
> + if (*active_idx > CONFIG_FWU_NUM_BANKS - 1) {
> + printf("Active index value read is incorrect\n");
> + ret = -EINVAL;
> + goto out;
> + }
> +
> +out:
> + free(metadata);
> +
> + return ret;
> +}
> +
> +static int gpt_get_image_alt_num(struct blk_desc *desc,
> + efi_guid_t image_type_id,
> + u32 update_bank, int *alt_no)
> +{
> + int ret, i;
> + u32 nparts;
> + gpt_entry *gpt_pte = NULL;
> + struct fwu_metadata *metadata;
> + struct fwu_image_entry *img_entry;
> + struct fwu_image_bank_info *img_bank_info;
> + efi_guid_t unique_part_guid;
> + efi_guid_t image_guid = NULL_GUID;
> +
> + ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1,
> + desc->blksz);
> +
> + ret = gpt_get_valid_metadata(&metadata);
> + if (ret < 0) {
> + log_err("Unable to read valid metadata\n");
> + goto out;
> + }
> +
> + /*
> + * The metadata has been read. Now get the image_uuid for the
> + * image with the update_bank.
> + */
> + for (i = 0; i < CONFIG_FWU_NUM_IMAGES_PER_BANK; i++) {
> + if (!guidcmp(&image_type_id,
> + &metadata->img_entry[i].image_type_uuid)) {
> + img_entry = &metadata->img_entry[i];
> + img_bank_info = &img_entry->img_bank_info[update_bank];
> + guidcpy(&image_guid, &img_bank_info->image_uuid);
> + }
> + }
> +
> + /*
> + * Now read the GPT Partition Table Entries to find a matching
> + * partition with UniquePartitionGuid value. We need to iterate
> + * through all the GPT partitions since they might be in any
> + * order
> + */
> + ret = get_gpt_hdr_parts(desc, gpt_head, &gpt_pte);
> + if (ret < 0) {
> + log_err("Error getting GPT header and partitions\n");
> + ret = -EIO;
> + goto out;
> + }
> +
> + nparts = gpt_head->num_partition_entries;
> +
> + for (i = 0; i < nparts; i++) {
> + unique_part_guid = gpt_pte[i].unique_partition_guid;
> + if (!guidcmp(&unique_part_guid, &image_guid)) {
> + /* Found the partition */
> + *alt_no = i + 1;
here we found the partition = <i>
but I am not sure of the hard-coded mapping here <alt> = <part_id> + 1
at least I think it should be configured for each board
for example with a weak function ?
*alt_no = board_get_dfu_alt_fwu(i);
with:
/* default => dfu alternate use the same order than parttion */
weak int board_get_dfu_alt_fwu(int part) {
return part + 1;
)
But I think we can make something more dynamic here by parsing DFU information
to found the alternate associated to the requested partition
by example by using dfu_get_entity()
=> search on the "mmc" dev / part
int mmc_get_dfu_alt_fwu(int dev, int part) {
for (i = 0; i < nb_alt; i++) {
dfu = dfu_get_entity(i);
/* only SDCard / eMMC suport with GPT partitioning */
if (dfu->dev_type != DFU_DEV_MMC)
continue;
if (dfu->layout = DFU_RAW_ADDR &&
dfu->data.mmc.dev == dev &&
dfu->data.mmc.part == part)
return
}
this request can support boards with several MMC instances
as the partitions are not the necessary the first one
for example trying to update partition in mmc 1
when partition on mmc 0 are the first one in dfu alternate.
> + break;
> + }
> + }
> +
> + if (i == nparts) {
> + log_err("Partition with the image guid not found\n");
> + ret = -EINVAL;
> + }
> +
> +out:
> + free(metadata);
> + free(gpt_pte);
> + return ret;
> +}
> +
> +int fwu_gpt_update_active_index(u32 active_idx)
> +{
> + int ret;
> + void *buf;
> + u32 cur_active_index;
> + struct fwu_metadata *metadata;
> +
> + if (active_idx > CONFIG_FWU_NUM_BANKS) {
> + printf("Active index value to be updated is incorrect\n");
> + return -1;
> + }
> +
> + ret = gpt_get_valid_metadata(&metadata);
> + if (ret < 0) {
> + log_err("Unable to get valid metadata\n");
> + goto out;
> + }
> +
> + /*
> + * Update the active index and previous_active_index fields
> + * in the metadata
> + */
> + cur_active_index = metadata->active_index;
> + metadata->active_index = active_idx;
> + metadata->previous_active_index = cur_active_index;
> +
> + /*
> + * Calculate the crc32 for the updated metadata
> + * and put the updated value in the metadata crc32
> + * field
> + */
> + buf = &metadata->version;
> + metadata->crc32 = crc32(0, buf, sizeof(*metadata) - sizeof(u32));
> +
> + /*
> + * Now write this updated metadata to both the
> + * metadata partitions
> + */
> + ret = gpt_update_metadata(metadata);
> + if (ret < 0) {
> + log_err("Failed to update metadata partitions\n");
> + ret = -EIO;
> + }
> +
> +out:
> + free(metadata);
> +
> + return ret;
> +}
> +
> +int fwu_gpt_fill_partition_guid_array(efi_guid_t **part_guid_arr, u32 *nparts)
> +{
> + int ret;
> + struct blk_desc *desc;
> +
> + ret = fwu_plat_get_blk_desc(&desc);
> + if (ret < 0) {
> + log_err("Block device not found\n");
> + return -ENODEV;
> + }
> +
> + return gpt_fill_partition_guid_array(desc, part_guid_arr, nparts);
> +}
> +
> +int fwu_gpt_get_image_alt_num(efi_guid_t image_type_id, u32 update_bank,
> + int *alt_no)
> +{
> + int ret;
> + struct blk_desc *desc;
> +
> + ret = fwu_plat_get_blk_desc(&desc);
> + if (ret < 0) {
> + log_err("Block device not found\n");
> + return -ENODEV;
> + }
> +
> + return gpt_get_image_alt_num(desc, image_type_id, update_bank, alt_no);
> +}
> +
> +int fwu_gpt_metadata_check(void)
> +{
> + /*
> + * Check if both the copies of the metadata are valid.
> + * If one has gone bad, restore it from the other good
> + * copy.
> + */
> + return gpt_check_metadata_validity();
> +}
> +
> +int fwu_gpt_get_metadata(struct fwu_metadata **metadata)
> +{
> + return gpt_get_valid_metadata(metadata);
> +}
> +
> +int fwu_gpt_revert_boot_index(u32 *active_idx)
> +{
> + int ret;
> + void *buf;
> + u32 cur_active_index;
> + struct fwu_metadata *metadata;
> +
> + ret = gpt_get_valid_metadata(&metadata);
> + if (ret < 0) {
> + log_err("Unable to get valid metadata\n");
> + goto out;
> + }
> +
> + /*
> + * Swap the active index and previous_active_index fields
> + * in the metadata
> + */
> + cur_active_index = metadata->active_index;
> + metadata->active_index = metadata->previous_active_index;
> + metadata->previous_active_index = cur_active_index;
> + *active_idx = metadata->active_index;
> +
> + /*
> + * Calculate the crc32 for the updated metadata
> + * and put the updated value in the metadata crc32
> + * field
> + */
> + buf = &metadata->version;
> + metadata->crc32 = crc32(0, buf, sizeof(*metadata) - sizeof(u32));
> +
> + /*
> + * Now write this updated metadata to both the
> + * metadata partitions
> + */
> + ret = gpt_update_metadata(metadata);
> + if (ret < 0) {
> + log_err("Failed to update metadata partitions\n");
> + ret = -EIO;
> + }
> +
> +out:
> + free(metadata);
> +
> + return ret;
> +}
> +
> +static int fwu_gpt_set_clear_image_accept(efi_guid_t *img_type_id,
> + u32 bank, u8 action)
> +{
> + void *buf;
> + int ret, i;
> + u32 nimages;
> + struct fwu_metadata *metadata;
> + struct fwu_image_entry *img_entry;
> + struct fwu_image_bank_info *img_bank_info;
> +
> + ret = gpt_get_valid_metadata(&metadata);
> + if (ret < 0) {
> + log_err("Unable to get valid metadata\n");
> + goto out;
> + }
> +
> + if (action == IMAGE_ACCEPT_SET)
> + bank = metadata->active_index;
> +
> + nimages = CONFIG_FWU_NUM_IMAGES_PER_BANK;
> + img_entry = &metadata->img_entry[0];
> + for (i = 0; i < nimages; i++) {
> + if (!guidcmp(&img_entry[i].image_type_uuid, img_type_id)) {
> + img_bank_info = &img_entry[i].img_bank_info[bank];
> + if (action == IMAGE_ACCEPT_SET)
> + img_bank_info->accepted |= FWU_IMAGE_ACCEPTED;
> + else
> + img_bank_info->accepted = 0;
> +
> + buf = &metadata->version;
> + metadata->crc32 = crc32(0, buf, sizeof(*metadata) -
> + sizeof(u32));
> +
> + ret = gpt_update_metadata(metadata);
> + goto out;
> + }
> + }
> +
> + /* Image not found */
> + ret = -EINVAL;
> +
> +out:
> + free(metadata);
> +
> + return ret;
> +}
> +
> +int fwu_gpt_accept_image(efi_guid_t *img_type_id)
> +{
> + return fwu_gpt_set_clear_image_accept(img_type_id, 0,
> + IMAGE_ACCEPT_SET);
> +}
> +
> +int fwu_gpt_clear_accept_image(efi_guid_t *img_type_id, u32 bank)
> +{
> + return fwu_gpt_set_clear_image_accept(img_type_id, bank,
> + IMAGE_ACCEPT_CLEAR);
> +}
> +
> +struct fwu_metadata_ops fwu_gpt_blk_ops = {
> + .get_active_index = fwu_gpt_get_active_index,
> + .update_active_index = fwu_gpt_update_active_index,
> + .fill_partition_guid_array = fwu_gpt_fill_partition_guid_array,
> + .get_image_alt_num = fwu_gpt_get_image_alt_num,
> + .metadata_check = fwu_gpt_metadata_check,
> + .revert_boot_index = fwu_gpt_revert_boot_index,
> + .set_accept_image = fwu_gpt_accept_image,
> + .clear_accept_image = fwu_gpt_clear_accept_image,
> + .get_metadata = fwu_gpt_get_metadata,
> +};
Regards
Patrick
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