[1.2] rootfs: only set mode= for tmpfs mount if target already existed#4974
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This was always the intended behaviour but commit 72fbb34 ("rootfs: switch to fd-based handling of mountpoint targets") regressed it when adding a mechanism to create a file handle to the target if it didn't already exist (causing the later stat to always succeed). A lot of people depend on this functionality, so add some tests to make sure we don't break it in the future. Fixes: 72fbb34 ("rootfs: switch to fd-based handling of mountpoint targets") Signed-off-by: Aleksa Sarai <cyphar@cyphar.com> (cherry picked from commit 9a9719e) Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
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Backport of #4973.
(Draft until merged.)This was always the intended behaviour but commit 72fbb34 ("rootfs:
switch to fd-based handling of mountpoint targets") regressed it when
adding a mechanism to create a file handle to the target if it didn't
already exist (causing the later stat to always succeed).
A lot of people depend on this functionality, so add some tests to make
sure we don't break it in the future.
Fixes #4971
Fixes: 72fbb34 ("rootfs: switch to fd-based handling of mountpoint targets")
Signed-off-by: Aleksa Sarai cyphar@cyphar.com