attr: add in_group_or_capable()

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In setattr_{copy,prepare}() we need to perform the same permission
checks to determine whether we need to drop the setgid bit or not.
Instead of open-coding it twice add a simple helper the encapsulates the
logic. We will reuse this helpers to make dropping the setgid bit during
write operations more consistent in a follow up patch.

Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>

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Christian Brauner 2022-10-17 17:06:34 +02:00 • committed by Christian Brauner (Microsoft)

parent 9abf2313ad

commit 11c2a8700c

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10

fs/attr.c

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28

fs/inode.c

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2

fs/internal.h

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