[PATCH 8/9] fastboot: Allow u-boot-style partitions
Sean Anderson
sean.anderson at seco.com
Mon Jan 4 17:53:24 CET 2021
On 12/31/20 5:48 PM, Sean Anderson wrote:
> This adds support for partitions of the form "dev.hwpart:part" and
> "dev#partname". This allows one to flash to eMMC boot partitions without
> having to use CONFIG_FASTBOOT_MMC_BOOT1_SUPPORT. It also allows one to
> flash to an entire device without needing CONFIG_FASTBOOT_MMC_USER_NAME.
> Lastly, one can also flash MMC devices other than
> CONFIG_FASTBOOT_FLASH_MMC_DEV.
>
> Because devices can be specified explicitly,
CONFIG_FASTBOOT_FLASH_MMC_DEV
> is used only when necessary for existing functionality. For those cases,
> fastboot_mmc_get_dev has been added as a helper function. This allows
>
> There should be no conflicts with the existing system, but just in
case, I
> have ordered detection of these names after all existing names.
>
> The fastboot_mmc_part test has been updated for these new names.
>
> Signed-off-by: Sean Anderson <sean.anderson at seco.com>
> ---
>
> drivers/fastboot/fb_mmc.c | 150 +++++++++++++++++++++++---------------
> test/dm/fastboot.c | 37 +++++++++-
> 2 files changed, 127 insertions(+), 60 deletions(-)
>
> diff --git a/drivers/fastboot/fb_mmc.c b/drivers/fastboot/fb_mmc.c
> index b0610d3151..a52b1e3ed6 100644
> --- a/drivers/fastboot/fb_mmc.c
> +++ b/drivers/fastboot/fb_mmc.c
> @@ -37,6 +37,7 @@ static int raw_part_get_info_by_name(struct
blk_desc *dev_desc,
> char *raw_part_desc;
> const char *argv[2];
> const char **parg = argv;
> + int ret;
>
> /* check for raw partition descriptor */
> strcpy(env_desc_name, "fastboot_raw_partition_");
> @@ -60,7 +61,7 @@ static int raw_part_get_info_by_name(struct
blk_desc *dev_desc,
>
> info->start = simple_strtoul(argv[0], NULL, 0);
> info->size = simple_strtoul(argv[1], NULL, 0);
> - info->blksz = dev_desc->blksz;
> + info->blksz = *dev_desc->blksz;
> strncpy((char *)info->name, name, PART_NAME_LEN);
Looks like this slipped through while rebasing. The above two hunks
shouldn't have been included; will be fixed in v2.
--Sean
>
> if (raw_part_desc) {
> @@ -76,12 +77,37 @@ static int raw_part_get_info_by_name(struct
blk_desc *dev_desc,
> return 0;
> }
>
> -static int part_get_info_by_name_or_alias(struct blk_desc *dev_desc,
> - const char *name, struct disk_partition *info)
> +static int do_get_part_info(struct blk_desc **dev_desc, const char
*name,
> + struct disk_partition *info)
> +{
> + int ret;
> +
> + /* First try partition names on the default device */
> + *dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
> + if (*dev_desc) {
> + ret = part_get_info_by_name(*dev_desc, name, info);
> + if (ret >= 0)
> + return ret;
> +
> + /* Then try raw partitions */
> + ret = raw_part_get_info_by_name(*dev_desc, name, info);
> + if (ret >= 0)
> + return ret;
> + }
> +
> + /* Then try dev.hwpart:part */
> + ret = part_get_info_by_dev_and_name_or_num("mmc", name, dev_desc,
> + info, true);
> + return ret;
> +}
> +
> +static int part_get_info_by_name_or_alias(struct blk_desc **dev_desc,
> + const char *name,
> + struct disk_partition *info)
> {
> int ret;
>
> - ret = part_get_info_by_name(dev_desc, name, info);
> + ret = do_get_part_info(dev_desc, name, info);
> if (ret < 0) {
> /* strlen("fastboot_partition_alias_") + PART_NAME_LEN + 1 */
> char env_alias_name[25 + PART_NAME_LEN + 1];
> @@ -92,8 +118,8 @@ static int part_get_info_by_name_or_alias(struct
blk_desc *dev_desc,
> strncat(env_alias_name, name, PART_NAME_LEN);
> aliased_part_name = env_get(env_alias_name);
> if (aliased_part_name != NULL)
> - ret = part_get_info_by_name(dev_desc,
> - aliased_part_name, info);
> + ret = do_get_part_info(dev_desc, aliased_part_name,
> + info);
> }
> return ret;
> }
> @@ -424,27 +450,49 @@ int fastboot_mmc_get_part_info(const char
*part_name,
> struct blk_desc **dev_desc,
> struct disk_partition *part_info, char *response)
> {
> - int r = 0;
> + int ret;
>
> - *dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
> - if (!*dev_desc) {
> - fastboot_fail("block device not found", response);
> - return -ENOENT;
> - }
> if (!part_name || !strcmp(part_name, "")) {
> fastboot_fail("partition not given", response);
> return -ENOENT;
> }
>
> - if (raw_part_get_info_by_name(*dev_desc, part_name, part_info) < 0) {
> - r = part_get_info_by_name_or_alias(*dev_desc, part_name, part_info);
> - if (r < 0) {
> - fastboot_fail("partition not found", response);
> - return r;
> + ret = part_get_info_by_name_or_alias(dev_desc, part_name, part_info);
> + if (ret < 0) {
> + switch (ret) {
> + case -ENOSYS:
> + case -EINVAL:
> + fastboot_fail("invalid partition or device", response);
> + break;
> + case -ENODEV:
> + fastboot_fail("no such device", response);
> + break;
> + case -ENOENT:
> + fastboot_fail("no such partition", response);
> + break;
> + case -EPROTONOSUPPORT:
> + fastboot_fail("unknown partition table type", response);
> + break;
> + default:
> + fastboot_fail("unanticipated error", response);
> + break;
> }
> }
>
> - return r;
> + return ret;
> +}
> +
> +static struct blk_desc *fastboot_mmc_get_dev(char *response)
> +{
> + struct blk_desc *ret = blk_get_dev("mmc",
> + CONFIG_FASTBOOT_FLASH_MMC_DEV);
> +
> + if (!ret || ret->type == DEV_TYPE_UNKNOWN) {
> + pr_err("invalid mmc device\n");
> + fastboot_fail("invalid mmc device", response);
> + return NULL;
> + }
> + return ret;
> }
>
> /**
> @@ -461,17 +509,12 @@ void fastboot_mmc_flash_write(const char *cmd,
void *download_buffer,
> struct blk_desc *dev_desc;
> struct disk_partition info;
>
> - dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
> - if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
> - pr_err("invalid mmc device\n");
> - fastboot_fail("invalid mmc device", response);
> - return;
> - }
> -
> #ifdef CONFIG_FASTBOOT_MMC_BOOT1_SUPPORT
> if (strcmp(cmd, CONFIG_FASTBOOT_MMC_BOOT1_NAME) == 0) {
> - fb_mmc_boot1_ops(dev_desc, download_buffer,
> - download_bytes, response);
> + dev_desc = fastboot_mmc_get_dev(response);
> + if (dev_desc)
> + fb_mmc_boot1_ops(dev_desc, download_buffer,
> + download_bytes, response);
> return;
> }
> #endif
> @@ -483,6 +526,10 @@ void fastboot_mmc_flash_write(const char *cmd,
void *download_buffer,
> if (strcmp(cmd, CONFIG_FASTBOOT_GPT_NAME) == 0 ||
> strcmp(cmd, CONFIG_FASTBOOT_MMC_USER_NAME) == 0) {
> #endif
> + dev_desc = fastboot_mmc_get_dev(response);
> + if (!dev_desc)
> + return;
> +
> printf("%s: updating MBR, Primary and Backup GPT(s)\n",
> __func__);
> if (is_valid_gpt_buf(dev_desc, download_buffer)) {
> @@ -505,6 +552,10 @@ void fastboot_mmc_flash_write(const char *cmd,
void *download_buffer,
>
> #if CONFIG_IS_ENABLED(DOS_PARTITION)
> if (strcmp(cmd, CONFIG_FASTBOOT_MBR_NAME) == 0) {
> + dev_desc = fastboot_mmc_get_dev(response);
> + if (!dev_desc)
> + return;
> +
> printf("%s: updating MBR\n", __func__);
> if (is_valid_dos_buf(download_buffer)) {
> printf("%s: invalid MBR - refusing to write to flash\n",
> @@ -526,19 +577,16 @@ void fastboot_mmc_flash_write(const char *cmd,
void *download_buffer,
>
> #ifdef CONFIG_ANDROID_BOOT_IMAGE
> if (strncasecmp(cmd, "zimage", 6) == 0) {
> - fb_mmc_update_zimage(dev_desc, download_buffer,
> - download_bytes, response);
> + dev_desc = fastboot_mmc_get_dev(response);
> + if (dev_desc)
> + fb_mmc_update_zimage(dev_desc, download_buffer,
> + download_bytes, response);
> return;
> }
> #endif
>
> - if (raw_part_get_info_by_name(dev_desc, cmd, &info) != 0) {
> - if (part_get_info_by_name_or_alias(dev_desc, cmd, &info) < 0) {
> - pr_err("cannot find partition: '%s'\n", cmd);
> - fastboot_fail("cannot find partition", response);
> - return;
> - }
> - }
> + if (fastboot_mmc_get_part_info(cmd, &dev_desc, &info, response) < 0)
> + return;
>
> if (is_sparse_image(download_buffer)) {
> struct fb_mmc_sparse sparse_priv;
> @@ -581,23 +629,12 @@ void fastboot_mmc_erase(const char *cmd, char
*response)
> lbaint_t blks, blks_start, blks_size, grp_size;
> struct mmc *mmc = find_mmc_device(CONFIG_FASTBOOT_FLASH_MMC_DEV);
>
> - if (mmc == NULL) {
> - pr_err("invalid mmc device\n");
> - fastboot_fail("invalid mmc device", response);
> - return;
> - }
> -
> - dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
> - if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
> - pr_err("invalid mmc device\n");
> - fastboot_fail("invalid mmc device", response);
> - return;
> - }
> -
> #ifdef CONFIG_FASTBOOT_MMC_BOOT1_SUPPORT
> if (strcmp(cmd, CONFIG_FASTBOOT_MMC_BOOT1_NAME) == 0) {
> /* erase EMMC boot1 */
> - fb_mmc_boot1_ops(dev_desc, NULL, 0, response);
> + dev_desc = fastboot_mmc_get_dev(response);
> + if (dev_desc)
> + fb_mmc_boot1_ops(dev_desc, NULL, 0, response);
> return;
> }
> #endif
> @@ -605,6 +642,10 @@ void fastboot_mmc_erase(const char *cmd, char
*response)
> #ifdef CONFIG_FASTBOOT_MMC_USER_NAME
> if (strcmp(cmd, CONFIG_FASTBOOT_MMC_USER_NAME) == 0) {
> /* erase EMMC userdata */
> + dev_desc = fastboot_mmc_get_dev(response);
> + if (!dev_desc)
> + return;
> +
> if (fb_mmc_erase_mmc_hwpart(dev_desc))
> fastboot_fail("Failed to erase EMMC_USER", response);
> else
> @@ -613,13 +654,8 @@ void fastboot_mmc_erase(const char *cmd, char
*response)
> }
> #endif
>
> - if (raw_part_get_info_by_name(dev_desc, cmd, &info) != 0) {
> - if (part_get_info_by_name_or_alias(dev_desc, cmd, &info) < 0) {
> - pr_err("cannot find partition: '%s'\n", cmd);
> - fastboot_fail("cannot find partition", response);
> - return;
> - }
> - }
> + if (fastboot_mmc_get_part_info(cmd, &dev_desc, &info, response) < 0)
> + return;
>
> /* Align blocks to erase group size to avoid erasing other
partitions */
> grp_size = mmc->erase_grp_size;
> diff --git a/test/dm/fastboot.c b/test/dm/fastboot.c
> index 8f905d8fa8..e7f8c362b8 100644
> --- a/test/dm/fastboot.c
> +++ b/test/dm/fastboot.c
> @@ -35,9 +35,12 @@ static int dm_test_fastboot_mmc_part(struct
unit_test_state *uts)
> },
> };
>
> - ut_assertok(blk_get_device_by_str("mmc",
> - __stringify(CONFIG_FASTBOOT_FLASH_MMC_DEV),
> - &mmc_dev_desc));
> + /*
> + * There are a lot of literal 0s I don't want to have to construct from
> + * MMC_DEV.
> + */
> + ut_asserteq(0, CONFIG_FASTBOOT_FLASH_MMC_DEV);
> + ut_assertok(blk_get_device_by_str("mmc", "0", &mmc_dev_desc));
> if (CONFIG_IS_ENABLED(RANDOM_UUID)) {
> gen_rand_uuid_str(parts[0].uuid, UUID_STR_FORMAT_STD);
> gen_rand_uuid_str(parts[1].uuid, UUID_STR_FORMAT_STD);
> @@ -59,6 +62,34 @@ static int dm_test_fastboot_mmc_part(struct
unit_test_state *uts)
> &part_info, response));
> ut_assertok(env_set(FB_ALIAS_PREFIX "test3", NULL));
>
> + /* "New" partition labels */
> + ut_asserteq(1, fastboot_mmc_get_part_info("#test1", &fb_dev_desc,
> + &part_info, response));
> + ut_asserteq(1, fastboot_mmc_get_part_info("0#test1", &fb_dev_desc,
> + &part_info, response));
> + ut_asserteq(1, fastboot_mmc_get_part_info("0.0#test1", &fb_dev_desc,
> + &part_info, response));
> + ut_asserteq(1, fastboot_mmc_get_part_info("0:1", &fb_dev_desc,
> + &part_info, response));
> + ut_asserteq(1, fastboot_mmc_get_part_info("0.0:1", &fb_dev_desc,
> + &part_info, response));
> + ut_asserteq(1, fastboot_mmc_get_part_info("0", &fb_dev_desc,
> + &part_info, response));
> + ut_asserteq(1, fastboot_mmc_get_part_info("0.0", &fb_dev_desc,
> + &part_info, response));
> + ut_asserteq(0, fastboot_mmc_get_part_info("0:0", &fb_dev_desc,
> + &part_info, response));
> + ut_asserteq(0, fastboot_mmc_get_part_info("0.0:0", &fb_dev_desc,
> + &part_info, response));
> + ut_asserteq(0, fastboot_mmc_get_part_info("1", &fb_dev_desc,
> + &part_info, response));
> + ut_asserteq(0, fastboot_mmc_get_part_info("1.0", &fb_dev_desc,
> + &part_info, response));
> + ut_asserteq(1, fastboot_mmc_get_part_info(":1", &fb_dev_desc,
> + &part_info, response));
> + ut_asserteq(0, fastboot_mmc_get_part_info(":0", &fb_dev_desc,
> + &part_info, response));
> +
> return 0;
> }
> DM_TEST(dm_test_fastboot_mmc_part, UT_TESTF_SCAN_PDATA |
UT_TESTF_SCAN_FDT);
>
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