Unable to mount ext2 file system on internal flash

[meghhagupta]

Hello everyone,
I am trying to mount an ext2 file system in the internal flash of the nucleo_h563zi. For that, i am following the sample https://github.com/zephyrproject-rtos/zephyr/tree/main/tests/subsys/fs/ext2 and https://github.com/zephyrproject-rtos/zephyr/blob/main/samples/subsys/fs/fs_sample/src/main.c . However, i am unable to do it. Below are my configurations for the project-

/* Ext2FS */
#ifdef CONFIG_FILE_SYSTEM_EXT2
#include <zephyr/storage/disk_access.h>
#include <zephyr/fs/ext2.h>
#include <zephyr/storage/flash_map.h>

#define EXT2_DISK_NAME  "SD"
#define EXT2_MOUNT_POINT "/ext"

static struct fs_mount_t ext2_mp = {
	.type = FS_EXT2,
	.flags = 0,
	// .storage_dev = (void *)FIXED_PARTITION_ID(storage),
	.storage_dev = EXT2_DISK_NAME,
	.mnt_point = EXT2_MOUNT_POINT,
};

struct fs_mount_t *mountpoint = &ext2_mp;

int fs_bench_mount(void)
{
	int rc = 0;

	static const char *disk_pdrv = EXT2_DISK_NAME;
	uint64_t memory_size_mb;
	uint32_t block_count;
	uint32_t block_size;

	do {

		if (disk_access_ioctl(disk_pdrv, DISK_IOCTL_CTRL_INIT, NULL) != 0) {
			LOG_ERR("Storage init ERROR!");
			break;
		}

		if (disk_access_ioctl(disk_pdrv, DISK_IOCTL_GET_SECTOR_COUNT, &block_count)) {
			LOG_ERR("Unable to get sector count");
			break;
		}
		LOG_INF("Block count %u", block_count);

		if (disk_access_ioctl(disk_pdrv, DISK_IOCTL_GET_SECTOR_SIZE, &block_size)) {
			LOG_ERR("Unable to get sector size");
			break;
		}
		printk("Sector size %u\n", block_size);

		memory_size_mb = (uint64_t)block_count * block_size;
		printk("Memory Size(MB) %u\n", (uint32_t)(memory_size_mb >> 20));

		if (disk_access_ioctl(disk_pdrv, DISK_IOCTL_CTRL_DEINIT, NULL) != 0) {
			LOG_ERR("Storage deinit ERROR!");
			break;
		}
	} while (0);

	rc = fs_mount(mountpoint);
	if (rc < 0) {
		LOG_PRINTK("FAIL: mount id %" PRIuPTR " at %s: %d\n",
			   (uintptr_t)mountpoint->storage_dev, mountpoint->mnt_point, rc);
		return rc;
	}
	LOG_PRINTK("%s mount: %d\n", mountpoint->mnt_point, rc);

	return 0;
}

#endif /* CONFIG_FILE_SYSTEM_EXT2 */

nucleo_h563zi.overlay-

/ {
	chosen {
	zephyr,code-partition = &code_partition;
	};
};

/delete-node/ &boot_partition;
/delete-node/ &slot0_partition;
/delete-node/ &slot1_partition;
/delete-node/ &storage_partition;

/ {
	storage_disk {
		compatible = "zephyr,flash-disk";
		partition = <&storage>;
		disk-name = "SD";
		cache-size = <8192>;
	};
};
&flash0 {
	partitions {
		compatible = "fixed-partitions";
		#address-cells = <1>;
		#size-cells = <1>;

		
		storage: partition@0 {
			reg = <0x00000000 DT_SIZE_M(1)>; 
		};
	
		code_partition: partition@80000 {
			label = "code";
			reg = <0x00100000 0x00080000>;   // 512 KB for firmware
		};
	};
};

prj.conf- https://github.com/zephyrproject-rtos/zephyr/blob/main/tests/subsys/fs/ext2/prj_flash.conf

[Laczen]

@anonym943, when the code partition is not placed at the start of the internal flash it is required to compile for the code partition and to have a bootloader that starts the application from the code partition. Have you made sure this is true? It is probably easier for first tests to put the code at the start of flash and the storage behind the code partition.

[meghhagupta]

perfect, thanks for that!