| bd_link_disk_holder(9) - phpMan
BD_LINK_DISK_HOLDER(9) The Linux VFS BD_LINK_DISK_HOLDER(9)
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
the claimed slave bdev
disk
the holding 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.
RETURN
0 on success, -errno on failure.
COPYRIGHT
Kernel Hackers Manual 4.8. January 2017 BD_LINK_DISK_HOLDER(9)
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