Re: [PATCH 3/9] generic/314, afs: Allow for a filesystem that doesn't honour SGID inheritance

Darrick J. Wong
2021-05-25T16:10:50Z

On Tue, May 25, 2021 at 02:34:09PM +0100, David Howells wrote:
> The AFS filesystem doesn't do any special handling for the SUID, SGID and
> SVTX bits and doesn't perform any sort of propagation. Further, only a
> user with cell admin rights can set non-0777 bits.
>
> Handle this by adding a "_require_sgid_inheritance" clause and labelling
> the test with it, thereby skipping for filesystems that don't support it.
>
> Signed-off-by: David Howells <dhowells@redhat.com>

Looks ok,
Reviewed-by: Darrick J. Wong <djwong@kernel.org>

--D

> cc: linux-afs@lists.infradead.org
> ---
>
> common/rc | 9 +++++++++
> doc/requirement-checking.txt | 7 +++++++
> tests/generic/314 | 1 +
> 3 files changed, 17 insertions(+)
>
> diff --git a/common/rc b/common/rc
> index 4ffec9a2..4d4b0280 100644
> --- a/common/rc
> +++ b/common/rc
> @@ -4613,6 +4613,15 @@ _has_mknod()
> esac
> }
>
> +_require_sgid_inheritance()
> +{
> + case $FSTYP in
> + afs)
> + _notrun "SGID-based group ID inheritance is not supported on $FSTYP"
> + ;;
> + esac
> +}
> +
> init_rc
>
> ################################################################################
> diff --git a/doc/requirement-checking.txt b/doc/requirement-checking.txt
> index d31ba3fb..6efc8dc8 100644
> --- a/doc/requirement-checking.txt
> +++ b/doc/requirement-checking.txt
> @@ -18,6 +18,7 @@ they have. This is done with _require_<xxx> macros, which may take parameters.
> _require_exportfs
> _require_mknod
> _has_mknod
> + _require_sgid_inheritance
>
> (3) System call requirements.
>
> @@ -106,6 +107,12 @@ _has_mknod
> _require_mknod will cause the test to be skipped; _has_mknod returns 0 if
> mknod is supported and 1 otherwise.
>
> +_require_sgid_inheritance
> +
> + The test required that the $TEST_DEV filesystem supports the inheritance
> + of the SGID bit and the GID from a marked directory. The test will be
> + skipped if not supported.
> +
>
> ========================
> SYSTEM CALL REQUIREMENTS
> diff --git a/tests/generic/314 b/tests/generic/314
> index 540f0feb..8ed08542 100755
> --- a/tests/generic/314
> +++ b/tests/generic/314
> @@ -30,6 +30,7 @@ _supported_fs generic
> _require_test
> _require_user
> _require_chown
> +_require_sgid_inheritance
>
> rm -rf $TEST_DIR/$seq-dir
>
>
>