From 0bdfbca8a623e262e0f343b143151000a300cbaf Mon Sep 17 00:00:00 2001 From: Dmitry Osipenko Date: Fri, 20 Aug 2021 03:45:33 +0300 Subject: [PATCH] block: Add alternative_gpt_sector() operation Add alternative_gpt_sector() block device operation which specifies alternative location of a GPT entry. This allows us to support Android devices that have GPT entry at a non-standard location and can't be repartitioned easily. Reviewed-by: Christoph Hellwig Suggested-by: Christoph Hellwig Signed-off-by: Dmitry Osipenko Reviewed-by: Ulf Hansson Link: https://lore.kernel.org/r/20210820004536.15791-2-digetx@gmail.com Signed-off-by: Jens Axboe --- include/linux/blkdev.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 22b5b85..c9cb124 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1872,6 +1872,13 @@ struct block_device_operations { char *(*devnode)(struct gendisk *disk, umode_t *mode); struct module *owner; const struct pr_ops *pr_ops; + + /* + * Special callback for probing GPT entry at a given sector. + * Needed by Android devices, used by GPT scanner and MMC blk + * driver. + */ + int (*alternative_gpt_sector)(struct gendisk *disk, sector_t *sector); }; #ifdef CONFIG_COMPAT -- 2.7.4