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block: add partition uuid into uevent as "PARTUUID"

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Both most common formats have uuid in addition to partition name:
GPT: standard uuid xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
DOS: 4 byte disk signature and 1 byte partition xxxxxxxx-xx

Tools from util-linux use the same notation for them.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Reviewed-by: Kyle Fortin <kyle.fortin@oracle.com>
[dianders: rebased to modern kernels]
Signed-off-by: Douglas Anderson <dianders@google.com>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20241004171340.v2.1.I938c91d10e454e841fdf5d64499a8ae8514dc004@changeid
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Konstantin Khlebnikov 2024-10-04 17:13:43 -07:00 committed by Jens Axboe
parent 746fc7e9d4
commit 758737d86f
1 changed files with 2 additions and 0 deletions
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2
block/partitions/core.c
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@ -256,6 +256,8 @@ static int part_uevent(const struct device *dev, struct kobj_uevent_env *env)
add_uevent_var(env, "PARTN=%u", bdev_partno(part)); add_uevent_var(env, "PARTN=%u", bdev_partno(part));
if (part->bd_meta_info && part->bd_meta_info->volname[0]) if (part->bd_meta_info && part->bd_meta_info->volname[0])
add_uevent_var(env, "PARTNAME=%s", part->bd_meta_info->volname); add_uevent_var(env, "PARTNAME=%s", part->bd_meta_info->volname);
if (part->bd_meta_info && part->bd_meta_info->uuid[0])
add_uevent_var(env, "PARTUUID=%s", part->bd_meta_info->uuid);
return 0; return 0;
} }