bd_link_disk_holder (9)

int bd_link_disk_holder(struct block_device * bdev, struct gendisk * disk);

bdev

the claimed slave bdev

disk

the holding disk

DON'T USE THIS UNLESS YOU'RE ALREADY USING IT.

This functions creates the following sysfs symlinks.

- from “slaves” directory of the holder disk to the claimed bdev - from “holders” directory of the bdev to the holder disk

For example, if /dev/dm-0 maps to /dev/sda and disk for dm-0 is passed to bd_link_disk_holder, then:

/sys/block/dm-0/slaves/sda --> /sys/block/sda /sys/block/sda/holders/dm-0 --> /sys/block/dm-0

The caller must have claimed bdev before calling this function and ensure that both bdev and disk are valid during the creation and lifetime of these symlinks.

Might sleep.

0 on success, -errno on failure.