Hi Andrew, While RPMB partition requires special IOCTL, the boot partition is only requires "switch partition", which is not unusual operation in eMMC. Why to prevent users access boot partition?
Thanks, Alex On 2/27/18, 1:34 PM, "[email protected] on behalf of Harish Jenny K N" <[email protected] on behalf of [email protected]> wrote: From: Andrew Gabbasov <[email protected]> Since RPMB area is accessible via special ioctl only and boot areas are unlikely to contain any partitions, exclude them all from listing in /proc/partitions. This will hide them from various user-level software (e.g. fdisk), thus avoiding unnecessary access attempts. Signed-off-by: Andrew Gabbasov <[email protected]> Signed-off-by: Harish Jenny K N <[email protected]> --- drivers/mmc/core/block.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c index 20135a5..376e47e 100644 --- a/drivers/mmc/core/block.c +++ b/drivers/mmc/core/block.c @@ -2341,7 +2341,8 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card, set_disk_ro(md->disk, md->read_only || default_ro); md->disk->flags = GENHD_FL_EXT_DEVT; if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT)) - md->disk->flags |= GENHD_FL_NO_PART_SCAN; + md->disk->flags |= GENHD_FL_NO_PART_SCAN + | GENHD_FL_SUPPRESS_PARTITION_INFO; /* * As discussed on lkml, GENHD_FL_REMOVABLE should: -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
