[PATCH v5 3/6] treewide: bcb: move ab_select command to bcb subcommands
Mattijs Korpershoek
mkorpershoek at baylibre.com
Tue Oct 22 11:01:08 CEST 2024
Hi Dmitry,
Thank you for the patch.
On jeu., oct. 17, 2024 at 17:12, Dmitry Rokosov <ddrokosov at salutedevices.com> wrote:
> To enhance code organization, it is beneficial to consolidate all A/B
> BCB management routines into a single super-command.
> The 'bcb' command is an excellent candidate for this purpose.
>
> This patch integrates the separate 'ab_select' command into the 'bcb'
> group as the 'ab_select' subcommand, maintaining the same parameter list
> for consistency.
>
> Signed-off-by: Dmitry Rokosov <ddrokosov at salutedevices.com>
Reviewed-by: Mattijs Korpershoek <mkorpershoek at baylibre.com>
> ---
> MAINTAINERS | 1 -
> cmd/Kconfig | 14 -------
> cmd/Makefile | 1 -
> cmd/ab_select.c | 66 -------------------------------
> cmd/bcb.c | 63 +++++++++++++++++++++++++++++
> configs/am57xx_evm_defconfig | 1 -
> configs/am57xx_hs_evm_defconfig | 1 -
> configs/am57xx_hs_evm_usb_defconfig | 1 -
> configs/khadas-vim3_android_ab_defconfig | 1 -
> configs/khadas-vim3l_android_ab_defconfig | 1 -
> configs/sandbox64_defconfig | 2 +
> configs/sandbox_defconfig | 1 -
> doc/android/ab.rst | 12 +++---
> include/configs/khadas-vim3_android.h | 2 +-
> include/configs/khadas-vim3l_android.h | 2 +-
> include/configs/meson64_android.h | 4 +-
> include/configs/ti_omap5_common.h | 4 +-
> test/py/tests/test_android/test_ab.py | 8 ++--
> 18 files changed, 81 insertions(+), 104 deletions(-)
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 7c6c368285e729dee11bb116cd7dd30d369b1a87..e0c6a6b4b43774258ce1e20100e4a2f01cbeaab0 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -65,7 +65,6 @@ R: Sam Protsenko <semen.protsenko at linaro.org>
> S: Maintained
> T: git https://source.denx.de/u-boot/custodians/u-boot-dfu.git
> F: boot/android_ab.c
> -F: cmd/ab_select.c
> F: doc/android/ab.rst
> F: include/android_ab.h
> F: test/py/tests/test_android/test_ab.py
> diff --git a/cmd/Kconfig b/cmd/Kconfig
> index 8c677b1e4864164d985914ea6ac4a65c6caee099..82b5852d47c1057ca9d5f13d078e428bb4a3b539 100644
> --- a/cmd/Kconfig
> +++ b/cmd/Kconfig
> @@ -1775,20 +1775,6 @@ config CMD_XXD
>
> endmenu
>
> -menu "Android support commands"
> -
> -config CMD_AB_SELECT
> - bool "ab_select"
> - depends on ANDROID_AB
> - help
> - On Android devices with more than one boot slot (multiple copies of
> - the kernel and system images) this provides a command to select which
> - slot should be used to boot from and register the boot attempt. This
> - is used by the new A/B update model where one slot is updated in the
> - background while running from the other slot.
> -
> -endmenu
> -
> if NET || NET_LWIP
>
> menuconfig CMD_NET
> diff --git a/cmd/Makefile b/cmd/Makefile
> index f30914053721d7e8ac17c828aef4d379cf3ecdb5..d1bb9d0e57d80855dd2da8af0cb510dbad65933e 100644
> --- a/cmd/Makefile
> +++ b/cmd/Makefile
> @@ -17,7 +17,6 @@ obj-$(CONFIG_CMD_2048) += 2048.o
> obj-$(CONFIG_CMD_ACPI) += acpi.o
> obj-$(CONFIG_CMD_ADDRMAP) += addrmap.o
> obj-$(CONFIG_CMD_AES) += aes.o
> -obj-$(CONFIG_CMD_AB_SELECT) += ab_select.o
> obj-$(CONFIG_CMD_ADC) += adc.o
> obj-$(CONFIG_CMD_ARMFLASH) += armflash.o
> obj-$(CONFIG_BLK) += blk_common.o
> diff --git a/cmd/ab_select.c b/cmd/ab_select.c
> deleted file mode 100644
> index 7c178c728ca4c8b5bcba02a04eef2d6a7c86afb6..0000000000000000000000000000000000000000
> --- a/cmd/ab_select.c
> +++ /dev/null
> @@ -1,66 +0,0 @@
> -// SPDX-License-Identifier: BSD-2-Clause
> -/*
> - * Copyright (C) 2017 The Android Open Source Project
> - */
> -
> -#include <android_ab.h>
> -#include <command.h>
> -#include <env.h>
> -#include <part.h>
> -
> -static int do_ab_select(struct cmd_tbl *cmdtp, int flag, int argc,
> - char *const argv[])
> -{
> - int ret;
> - struct blk_desc *dev_desc;
> - struct disk_partition part_info;
> - char slot[2];
> - bool dec_tries = true;
> -
> - if (argc < 4)
> - return CMD_RET_USAGE;
> -
> - for (int i = 4; i < argc; i++) {
> - if (strcmp(argv[i], "--no-dec") == 0) {
> - dec_tries = false;
> - } else {
> - return CMD_RET_USAGE;
> - }
> - }
> -
> - /* Lookup the "misc" partition from argv[2] and argv[3] */
> - if (part_get_info_by_dev_and_name_or_num(argv[2], argv[3],
> - &dev_desc, &part_info,
> - false) < 0) {
> - return CMD_RET_FAILURE;
> - }
> -
> - ret = ab_select_slot(dev_desc, &part_info, dec_tries);
> - if (ret < 0) {
> - printf("Android boot failed, error %d.\n", ret);
> - return CMD_RET_FAILURE;
> - }
> -
> - /* Android standard slot names are 'a', 'b', ... */
> - slot[0] = BOOT_SLOT_NAME(ret);
> - slot[1] = '\0';
> - env_set(argv[1], slot);
> - printf("ANDROID: Booting slot: %s\n", slot);
> - return CMD_RET_SUCCESS;
> -}
> -
> -U_BOOT_CMD(ab_select, 5, 0, do_ab_select,
> - "Select the slot used to boot from and register the boot attempt.",
> - "<slot_var_name> <interface> <dev[:part|#part_name]> [--no-dec]\n"
> - " - Load the slot metadata from the partition 'part' on\n"
> - " device type 'interface' instance 'dev' and store the active\n"
> - " slot in the 'slot_var_name' variable. This also updates the\n"
> - " Android slot metadata with a boot attempt, which can cause\n"
> - " successive calls to this function to return a different result\n"
> - " if the returned slot runs out of boot attempts.\n"
> - " - If 'part_name' is passed, preceded with a # instead of :, the\n"
> - " partition name whose label is 'part_name' will be looked up in\n"
> - " the partition table. This is commonly the \"misc\" partition.\n"
> - " - If '--no-dec' is set, the number of tries remaining will not\n"
> - " decremented for the selected boot slot\n"
> -);
> diff --git a/cmd/bcb.c b/cmd/bcb.c
> index 98b2a71087a27b1721f4bed4160095d65ec75402..2854408e5669b0d7d2a06073fa81158b21834b99 100644
> --- a/cmd/bcb.c
> +++ b/cmd/bcb.c
> @@ -8,6 +8,7 @@
> #include <android_bootloader_message.h>
> #include <bcb.h>
> #include <command.h>
> +#include <android_ab.h>
> #include <display_options.h>
> #include <log.h>
> #include <part.h>
> @@ -376,6 +377,48 @@ void bcb_reset(void)
> __bcb_reset();
> }
>
> +__maybe_unused static int do_bcb_ab_select(struct cmd_tbl *cmdtp,
> + int flag, int argc,
> + char * const argv[])
> +{
> + int ret;
> + struct blk_desc *dev_desc;
> + struct disk_partition part_info;
> + char slot[2];
> + bool dec_tries = true;
> +
> + if (argc < 4)
> + return CMD_RET_USAGE;
> +
> + for (int i = 4; i < argc; i++) {
> + if (strcmp(argv[i], "--no-dec") == 0)
> + dec_tries = false;
> + else
> + return CMD_RET_USAGE;
> + }
> +
> + /* Lookup the "misc" partition from argv[2] and argv[3] */
> + if (part_get_info_by_dev_and_name_or_num(argv[2], argv[3],
> + &dev_desc, &part_info,
> + false) < 0) {
> + return CMD_RET_FAILURE;
> + }
> +
> + ret = ab_select_slot(dev_desc, &part_info, dec_tries);
> + if (ret < 0) {
> + printf("Android boot failed, error %d.\n", ret);
> + return CMD_RET_FAILURE;
> + }
> +
> + /* Android standard slot names are 'a', 'b', ... */
> + slot[0] = BOOT_SLOT_NAME(ret);
> + slot[1] = '\0';
> + env_set(argv[1], slot);
> + printf("ANDROID: Booting slot: %s\n", slot);
> +
> + return CMD_RET_SUCCESS;
> +}
> +
> U_BOOT_LONGHELP(bcb,
> "load <interface> <dev> <part> - load BCB from <interface> <dev>:<part>\n"
> "load <dev> <part> - load BCB from mmc <dev>:<part>\n"
> @@ -385,6 +428,23 @@ U_BOOT_LONGHELP(bcb,
> "bcb dump <field> - dump BCB <field>\n"
> "bcb store - store BCB back to <interface>\n"
> "\n"
> +#if IS_ENABLED(CONFIG_ANDROID_AB)
> + "bcb ab_select -\n"
> + " Select the slot used to boot from and register the boot attempt.\n"
> + " <slot_var_name> <interface> <dev[:part|#part_name]> [--no-dec]\n"
> + " - Load the slot metadata from the partition 'part' on\n"
> + " device type 'interface' instance 'dev' and store the active\n"
> + " slot in the 'slot_var_name' variable. This also updates the\n"
> + " Android slot metadata with a boot attempt, which can cause\n"
> + " successive calls to this function to return a different result\n"
> + " if the returned slot runs out of boot attempts.\n"
> + " - If 'part_name' is passed, preceded with a # instead of :, the\n"
> + " partition name whose label is 'part_name' will be looked up in\n"
> + " the partition table. This is commonly the \"misc\" partition.\n"
> + " - If '--no-dec' is set, the number of tries remaining will not\n"
> + " decremented for the selected boot slot\n"
> + "\n"
> +#endif
> "Legend:\n"
> "<interface> - storage device interface (virtio, mmc, etc)\n"
> "<dev> - storage device index containing the BCB partition\n"
> @@ -406,4 +466,7 @@ U_BOOT_CMD_WITH_SUBCMDS(bcb,
> U_BOOT_SUBCMD_MKENT(test, 4, 1, do_bcb_test),
> U_BOOT_SUBCMD_MKENT(dump, 2, 1, do_bcb_dump),
> U_BOOT_SUBCMD_MKENT(store, 1, 1, do_bcb_store),
> +#if IS_ENABLED(CONFIG_ANDROID_AB)
> + U_BOOT_SUBCMD_MKENT(ab_select, 5, 1, do_bcb_ab_select),
> +#endif
> );
> diff --git a/configs/am57xx_evm_defconfig b/configs/am57xx_evm_defconfig
> index efc154eda043ff3ea08194288e33792ce48282f9..b793f00babe474ea3f15292fb4015a7120401238 100644
> --- a/configs/am57xx_evm_defconfig
> +++ b/configs/am57xx_evm_defconfig
> @@ -48,7 +48,6 @@ CONFIG_CMD_SPL=y
> CONFIG_SYS_I2C_EEPROM_ADDR_LEN=2
> CONFIG_CMD_BCB=y
> # CONFIG_CMD_SETEXPR is not set
> -CONFIG_CMD_AB_SELECT=y
> CONFIG_BOOTP_DNS2=y
> # CONFIG_CMD_PMIC is not set
> CONFIG_CMD_AVB=y
> diff --git a/configs/am57xx_hs_evm_defconfig b/configs/am57xx_hs_evm_defconfig
> index 0f8533e15dbd7c0186a513b27b46a0407b6f79f1..5cacd7f9cc53d338d52120186b16684add93fd21 100644
> --- a/configs/am57xx_hs_evm_defconfig
> +++ b/configs/am57xx_hs_evm_defconfig
> @@ -44,7 +44,6 @@ CONFIG_CMD_ADTIMG=y
> CONFIG_CMD_ABOOTIMG=y
> CONFIG_SYS_I2C_EEPROM_ADDR_LEN=2
> CONFIG_CMD_BCB=y
> -CONFIG_CMD_AB_SELECT=y
> CONFIG_BOOTP_DNS2=y
> # CONFIG_CMD_PMIC is not set
> CONFIG_CMD_AVB=y
> diff --git a/configs/am57xx_hs_evm_usb_defconfig b/configs/am57xx_hs_evm_usb_defconfig
> index 81a938339d5934605cb7defa04ea92f76468b21a..2d8068ecdc79c01c1281ab3873fc892aa4c96be7 100644
> --- a/configs/am57xx_hs_evm_usb_defconfig
> +++ b/configs/am57xx_hs_evm_usb_defconfig
> @@ -46,7 +46,6 @@ CONFIG_CMD_ADTIMG=y
> CONFIG_CMD_ABOOTIMG=y
> CONFIG_SYS_I2C_EEPROM_ADDR_LEN=2
> CONFIG_CMD_BCB=y
> -CONFIG_CMD_AB_SELECT=y
> CONFIG_BOOTP_DNS2=y
> # CONFIG_CMD_PMIC is not set
> CONFIG_CMD_AVB=y
> diff --git a/configs/khadas-vim3_android_ab_defconfig b/configs/khadas-vim3_android_ab_defconfig
> index 510fe4f8928fe39a040a615636fa550b3e0dc5db..de5357c45cbfe4742d9491a29386850570acc235 100644
> --- a/configs/khadas-vim3_android_ab_defconfig
> +++ b/configs/khadas-vim3_android_ab_defconfig
> @@ -47,7 +47,6 @@ CONFIG_CMD_SPI=y
> CONFIG_CMD_USB=y
> CONFIG_CMD_USB_MASS_STORAGE=y
> # CONFIG_CMD_SETEXPR is not set
> -CONFIG_CMD_AB_SELECT=y
> CONFIG_CMD_REGULATOR=y
> CONFIG_CMD_AVB=y
> CONFIG_OF_CONTROL=y
> diff --git a/configs/khadas-vim3l_android_ab_defconfig b/configs/khadas-vim3l_android_ab_defconfig
> index d2da8ff2a69b209b8fb22a48be537bd4dd17a3bb..4d7b90f23002e464d7dc40516bcd3161b0f59439 100644
> --- a/configs/khadas-vim3l_android_ab_defconfig
> +++ b/configs/khadas-vim3l_android_ab_defconfig
> @@ -47,7 +47,6 @@ CONFIG_CMD_SPI=y
> CONFIG_CMD_USB=y
> CONFIG_CMD_USB_MASS_STORAGE=y
> # CONFIG_CMD_SETEXPR is not set
> -CONFIG_CMD_AB_SELECT=y
> CONFIG_CMD_REGULATOR=y
> CONFIG_CMD_AVB=y
> CONFIG_OF_CONTROL=y
> diff --git a/configs/sandbox64_defconfig b/configs/sandbox64_defconfig
> index 1b3b8c6e788cd6845b61e62a06b730da28831edc..b5f80b8572ad32b2a92d4fe82c9068c453c11dfd 100644
> --- a/configs/sandbox64_defconfig
> +++ b/configs/sandbox64_defconfig
> @@ -27,6 +27,7 @@ CONFIG_CONSOLE_RECORD=y
> CONFIG_CONSOLE_RECORD_OUT_SIZE=0x6000
> CONFIG_PRE_CONSOLE_BUFFER=y
> CONFIG_DISPLAY_BOARDINFO_LATE=y
> +CONFIG_ANDROID_AB=y
> CONFIG_CMD_CPU=y
> CONFIG_CMD_LICENSE=y
> CONFIG_CMD_BOOTZ=y
> @@ -46,6 +47,7 @@ CONFIG_CMD_MD5SUM=y
> CONFIG_CMD_MEMINFO=y
> CONFIG_CMD_MX_CYCLIC=y
> CONFIG_CMD_MEMTEST=y
> +CONFIG_CMD_BCB=y
> CONFIG_CMD_CLK=y
> CONFIG_CMD_DEMO=y
> CONFIG_CMD_GPIO=y
> diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
> index f596f1cc55a45ade4862122a6944d109c6c29238..d111858082d5a8ed3725c95462b2c81a406b57d2 100644
> --- a/configs/sandbox_defconfig
> +++ b/configs/sandbox_defconfig
> @@ -103,7 +103,6 @@ CONFIG_CMD_AXI=y
> CONFIG_CMD_CAT=y
> CONFIG_CMD_SETEXPR_FMT=y
> CONFIG_CMD_XXD=y
> -CONFIG_CMD_AB_SELECT=y
> CONFIG_CMD_DHCP6=y
> CONFIG_BOOTP_DNS2=y
> CONFIG_CMD_PCAP=y
> diff --git a/doc/android/ab.rst b/doc/android/ab.rst
> index 2adf88781d60b61d1b3c74efe976a684b590c813..7fd4aeb6a724b839de9be5e9a8843ade2ad3667e 100644
> --- a/doc/android/ab.rst
> +++ b/doc/android/ab.rst
> @@ -18,7 +18,7 @@ The A/B updates support can be activated by specifying next options in
> your board configuration file::
>
> CONFIG_ANDROID_AB=y
> - CONFIG_CMD_AB_SELECT=y
> + CONFIG_CMD_BCB=y
>
> The disk space on target device must be partitioned in a way so that each
> partition which needs to be updated has two or more instances. The name of
> @@ -26,8 +26,8 @@ each instance must be formed by adding suffixes: ``_a``, ``_b``, ``_c``, etc.
> For example: ``boot_a``, ``boot_b``, ``system_a``, ``system_b``, ``vendor_a``,
> ``vendor_b``.
>
> -As a result you can use ``ab_select`` command to ensure A/B boot process in your
> -boot script. This command analyzes and processes A/B metadata stored on a
> +As a result you can use ``bcb ab_select`` command to ensure A/B boot process in
> +your boot script. This command analyzes and processes A/B metadata stored on a
> special partition (e.g. ``misc``) and determines which slot should be used for
> booting up.
>
> @@ -42,15 +42,15 @@ Command usage
>
> .. code-block:: none
>
> - ab_select <slot_var_name> <interface> <dev[:part_number|#part_name]>
> + bcb ab_select <slot_var_name> <interface> <dev[:part_number|#part_name]>
>
> for example::
>
> - => ab_select slot_name mmc 1:4
> + => bcb ab_select slot_name mmc 1:4
>
> or::
>
> - => ab_select slot_name mmc 1#misc
> + => bcb ab_select slot_name mmc 1#misc
>
> Result::
>
> diff --git a/include/configs/khadas-vim3_android.h b/include/configs/khadas-vim3_android.h
> index b76e049f09cc014837981e914a3792c829f42cdc..fc89efb4c36e5216a1344bb2d758300eec3c8f44 100644
> --- a/include/configs/khadas-vim3_android.h
> +++ b/include/configs/khadas-vim3_android.h
> @@ -12,7 +12,7 @@
> #define LOGO_UUID "43a3305d-150f-4cc9-bd3b-38fca8693846;"
> #define ROOT_UUID "ddb8c3f6-d94d-4394-b633-3134139cc2e0;"
>
> -#if defined(CONFIG_CMD_AB_SELECT)
> +#if defined(CONFIG_CMD_BCB) && defined(CONFIG_ANDROID_AB)
> #define PARTS_DEFAULT \
> "uuid_disk=${uuid_gpt_disk};" \
> "name=logo,start=512K,size=2M,uuid=" LOGO_UUID \
> diff --git a/include/configs/khadas-vim3l_android.h b/include/configs/khadas-vim3l_android.h
> index 0ab8ffd372a4ae44804fca41c11ee930aaa72460..5b2aed1cf62af213f0ea6688fde6d07267aa4f55 100644
> --- a/include/configs/khadas-vim3l_android.h
> +++ b/include/configs/khadas-vim3l_android.h
> @@ -12,7 +12,7 @@
> #define LOGO_UUID "43a3305d-150f-4cc9-bd3b-38fca8693846;"
> #define ROOT_UUID "ddb8c3f6-d94d-4394-b633-3134139cc2e0;"
>
> -#if defined(CONFIG_CMD_AB_SELECT)
> +#if defined(CONFIG_CMD_BCB) && defined(CONFIG_ANDROID_AB)
> #define PARTS_DEFAULT \
> "uuid_disk=${uuid_gpt_disk};" \
> "name=logo,start=512K,size=2M,uuid=" LOGO_UUID \
> diff --git a/include/configs/meson64_android.h b/include/configs/meson64_android.h
> index fa520265800ccf081862bc97643b6a8e28b13327..77364bbf9cf0d1b68d413773902ea9d18b720928 100644
> --- a/include/configs/meson64_android.h
> +++ b/include/configs/meson64_android.h
> @@ -47,13 +47,13 @@
> #define AVB_VERIFY_CMD ""
> #endif
>
> -#if defined(CONFIG_CMD_AB_SELECT)
> +#if defined(CONFIG_CMD_BCB) && defined(CONFIG_ANDROID_AB)
> #define ANDROIDBOOT_GET_CURRENT_SLOT_CMD "get_current_slot=" \
> "if part number mmc ${mmcdev} " CONTROL_PARTITION " control_part_number; " \
> "then " \
> "echo " CONTROL_PARTITION \
> " partition number:${control_part_number};" \
> - "ab_select current_slot mmc ${mmcdev}:${control_part_number};" \
> + "bcb ab_select current_slot mmc ${mmcdev}:${control_part_number};" \
> "else " \
> "echo " CONTROL_PARTITION " partition not found;" \
> "fi;\0"
> diff --git a/include/configs/ti_omap5_common.h b/include/configs/ti_omap5_common.h
> index 26494ae980108ad84eb173a0deaa7b701a5309d4..26b6c1cd188c05371c6455cd6247f07a1773d885 100644
> --- a/include/configs/ti_omap5_common.h
> +++ b/include/configs/ti_omap5_common.h
> @@ -93,13 +93,13 @@
>
> #define CONTROL_PARTITION "misc"
>
> -#if defined(CONFIG_CMD_AB_SELECT)
> +#if defined(CONFIG_CMD_BCB) && defined(CONFIG_ANDROID_AB)
> #define AB_SELECT_SLOT \
> "if part number mmc 1 " CONTROL_PARTITION " control_part_number; " \
> "then " \
> "echo " CONTROL_PARTITION \
> " partition number:${control_part_number};" \
> - "ab_select slot_name mmc ${mmcdev}:${control_part_number};" \
> + "bcb ab_select slot_name mmc ${mmcdev}:${control_part_number};" \
> "else " \
> "echo " CONTROL_PARTITION " partition not found;" \
> "exit;" \
> diff --git a/test/py/tests/test_android/test_ab.py b/test/py/tests/test_android/test_ab.py
> index c79cb07fda35dfeb608ac7345cd3f22744e2e491..0d7b7995a9fab6e3daad748721818b9e4cfac452 100644
> --- a/test/py/tests/test_android/test_ab.py
> +++ b/test/py/tests/test_android/test_ab.py
> @@ -56,20 +56,20 @@ def ab_disk_image(u_boot_console):
>
> @pytest.mark.boardspec('sandbox')
> @pytest.mark.buildconfigspec('android_ab')
> - at pytest.mark.buildconfigspec('cmd_ab_select')
> + at pytest.mark.buildconfigspec('cmd_bcb')
> @pytest.mark.requiredtool('sgdisk')
> def test_ab(ab_disk_image, u_boot_console):
> - """Test the 'ab_select' command."""
> + """Test the 'bcb ab_select' command."""
>
> u_boot_console.run_command('host bind 0 ' + ab_disk_image.path)
>
> - output = u_boot_console.run_command('ab_select slot_name host 0#misc')
> + output = u_boot_console.run_command('bcb ab_select slot_name host 0#misc')
> assert 're-initializing A/B metadata' in output
> assert 'Attempting slot a, tries remaining 7' in output
> output = u_boot_console.run_command('printenv slot_name')
> assert 'slot_name=a' in output
>
> - output = u_boot_console.run_command('ab_select slot_name host 0:1')
> + output = u_boot_console.run_command('bcb ab_select slot_name host 0:1')
> assert 'Attempting slot b, tries remaining 7' in output
> output = u_boot_console.run_command('printenv slot_name')
> assert 'slot_name=b' in output
>
> --
> 2.43.0
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