1BD_LINK_DISK_HOLDER(9)           The Linux VFS          BD_LINK_DISK_HOLDER(9)
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NAME

6       bd_link_disk_holder - create symlinks between holding disk and slave
7       bdev
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SYNOPSIS

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

14       bdev
15           the claimed slave bdev
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17       disk
18           the holding disk
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DESCRIPTION

21       DON'T USE THIS UNLESS YOU'RE ALREADY USING IT.
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23       This functions creates the following sysfs symlinks.
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25       - from “slaves” directory of the holder disk to the claimed bdev - from
26       “holders” directory of the bdev to the holder disk
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28       For example, if /dev/dm-0 maps to /dev/sda and disk for dm-0 is passed
29       to bd_link_disk_holder, then:
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31       /sys/block/dm-0/slaves/sda --> /sys/block/sda
32       /sys/block/sda/holders/dm-0 --> /sys/block/dm-0
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34       The caller must have claimed bdev before calling this function and
35       ensure that both bdev and disk are valid during the creation and
36       lifetime of these symlinks.
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CONTEXT

39       Might sleep.
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RETURNS

42       0 on success, -errno on failure.
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45Kernel Hackers Manual 3.10         June 2019            BD_LINK_DISK_HOLDER(9)
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