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[0/2] vfs: fstatat, statx: Consistently accept AT_EMPTY_PATH and NULL path

Message ID 20241007130825.10326-1-xry111@xry111.site (mailing list archive)
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Series vfs: fstatat, statx: Consistently accept AT_EMPTY_PATH and NULL path | expand

Message

Xi Ruoyao Oct. 7, 2024, 1:08 p.m. UTC 
Since Linux 6.11 we support AT_EMPTY_PATH and NULL path for fstatat and
statx in "some circumstances" mostly for performance and allowing
seccomp audition.  But to make the API easier to be documented and used,
we should just treat AT_EMPTY_PATH and NULL as is AT_EMPTY_PATH and
empty string even if there are no performance or seccomp benefits.

Cc: Miao Wang <shankerwangmiao@gmail.com>
Cc: linux-fsdevel@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: stable@vger.kernel.org

Xi Ruoyao (2):
  vfs: support fstatat(..., NULL, AT_EMPTY_PATH | AT_NO_AUTOMOUNT, ...)
  vfs: Make sure {statx,fstatat}(..., AT_EMPTY_PATH | ..., NULL, ...)
    behave as (..., AT_EMPTY_PATH | ..., "", ...)

 fs/stat.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)