NAME¶

bd_link_disk_holder - create symlinks between holding disk and slave bdev

SYNOPSIS¶

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

ARGUMENTS¶

bdev

disk

DESCRIPTION¶

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.

CONTEXT¶

Might sleep.

RETURNS¶

0 on success, -errno on failure.

COPYRIGHT¶