Add flag ADDPART_FLAG_READONLY to allow partition parsers marking a partition to be set read-only. This is needed for the uImage.FIT partition parser added by a follow-up commit: we need to be sure the contents of uImage.FIT sub-images remain unaltered they are validated using a hash within the uImage.FIT structure which also serves as partition table. Signed-off-by: Daniel Golle <daniel@xxxxxxxxxxxxxx> --- block/blk.h | 1 + block/partitions/core.c | 3 +++ 2 files changed, 4 insertions(+) diff --git a/block/blk.h b/block/blk.h index e85703ae81dd..05ac426350b2 100644 --- a/block/blk.h +++ b/block/blk.h @@ -414,6 +414,7 @@ void blk_free_ext_minor(unsigned int minor); #define ADDPART_FLAG_NONE 0 #define ADDPART_FLAG_RAID 1 #define ADDPART_FLAG_WHOLEDISK 2 +#define ADDPART_FLAG_READONLY 4 int bdev_add_partition(struct gendisk *disk, int partno, sector_t start, sector_t length); int bdev_del_partition(struct gendisk *disk, int partno); diff --git a/block/partitions/core.c b/block/partitions/core.c index b8112f52d388..355646b0707d 100644 --- a/block/partitions/core.c +++ b/block/partitions/core.c @@ -398,6 +398,9 @@ static struct block_device *add_partition(struct gendisk *disk, int partno, goto out_del; } + if (flags & ADDPART_FLAG_READONLY) + bdev->bd_read_only = true; + /* everything is up and running, commence */ err = xa_insert(&disk->part_tbl, partno, bdev, GFP_KERNEL); if (err) -- 2.38.1
