bd_link_disk_holder — create symlinks between holding disk and slave bdev
int fsfuncbd_link_disk_holder ( | struct block_device * bdev, |
struct gendisk * 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.