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FROMGIT: 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>
(cherry picked from commit 758737d86f8a2d74c0fa9f8b2523fa7fd1e0d0aa
 git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-6.13/block)

Bug: 316324155
Test: PARTUUID shows up in uevent
Change-Id: I938c91d10e454e841fdf5d64499a8ae8514dc004
Signed-off-by: Douglas Anderson <dianders@google.com>
This commit is contained in:
Konstantin Khlebnikov
2024-10-04 17:13:43 -07:00
committed by Doug Anderson
parent 942421fdf3
commit d5815ee061
1 changed files with 2 additions and 0 deletions
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block/partitions/core.c
+2
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@@ -253,6 +253,8 @@ static int part_uevent(const struct device *dev, struct kobj_uevent_env *env)
add_uevent_var(env, "PARTN=%u", bdev_partno(part));
if (part->bd_meta_info && part->bd_meta_info->volname[0])
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;
}