Hey, After having synced with Andrei with the ARM time namespace support patchset we've decided to make vdso_join_timens() a function that cannot fail but not yet change its return type so the changes for ARM can proceed independently. We will simply have a follow-up patch right after these changes land during the v5.9 merge window that changes vdso_join_timens() from returning an int to void.
So far setns() with pidfds was missing time namespace support. This was partially due to it simply not being implemented but also because vdso_join_timens() could still fail which made switching to multiple namespaces atomically problematic. This series first fixes vdso_join_timens() to never fail, introduces timens_commit() and finally adds CLONE_NEWTIME support for setns(). Thanks! Christian Christian Brauner (4): timens: make vdso_join_timens() always succeed timens: add timens_commit() helper nsproxy: support CLONE_NEWTIME with setns() tests: add CLONE_NEWTIME setns tests arch/x86/entry/vdso/vma.c | 5 +- include/linux/time_namespace.h | 6 ++ kernel/nsproxy.c | 21 ++++- kernel/time/namespace.c | 22 ++---- tools/testing/selftests/pidfd/pidfd.h | 4 + .../selftests/pidfd/pidfd_setns_test.c | 76 +++++++++++++++++++ 6 files changed, 115 insertions(+), 19 deletions(-) base-commit: dcb7fd82c75ee2d6e6f9d8cc71c52519ed52e258 -- 2.27.0
