linux/tools/testing/selftests/pidfd, branch v6.16

Merge tag 'vfs-6.16-rc1.selftests' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

2025-05-26T18:32:28Z

Pull vfs selftests updates from Christian Brauner: "This contains various cleanups, fixes, and extensions for out filesystem selftests" * tag 'vfs-6.16-rc1.selftests' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: selftests/fs/mount-notify: add a test variant running inside userns selftests/filesystems: create setup_userns() helper selftests/filesystems: create get_unique_mnt_id() helper selftests/fs/mount-notify: build with tools include dir selftests/mount_settattr: remove duplicate syscall definitions selftests/pidfd: move syscall definitions into wrappers.h selftests/fs/statmount: build with tools include dir selftests/filesystems: move wrapper.h out of overlayfs subdir selftests/mount_settattr: ensure that ext4 filesystem can be created selftests/mount_settattr: add missing STATX_MNT_ID_UNIQUE define selftests/mount_settattr: don't define sys_open_tree() twice

selftests/pidfd: add PIDFD_INFO_COREDUMP infrastructure

2025-05-21T11:59:12Z

Add PIDFD_INFO_COREDUMP infrastructure so we can use it in tests. Link: https://lore.kernel.org/20250516-work-coredump-socket-v8-8-664f3caf2516@kernel.org Acked-by: Luca Boccassi Reviewed-by: Alexander Mikhalitsyn Signed-off-by: Christian Brauner

selftests/pidfd: move syscall definitions into wrappers.h

2025-05-12T09:40:12Z

There was already duplicity in some of the defintions. Remove syscall number defintions for __ia64__ that are both stale and incorrect. Signed-off-by: Amir Goldstein Link: https://lore.kernel.org/20250509133240.529330-4-amir73il@gmail.com Reviewed-by: Christian Brauner Signed-off-by: Christian Brauner

selftest/pidfd: add test for thread-group leader pidfd open for thread

2025-04-07T07:38:24Z

Verify that we report ENOENT when userspace tries to create a thread-group leader pidfd for a thread pidfd that isn't a thread-group leader. Link: https://lore.kernel.org/r/20250403-work-pidfd-fixes-v1-4-a123b6ed6716@kernel.org Reviewed-by: Oleg Nesterov Signed-off-by: Christian Brauner

selftests/pidfd: adapt to recent changes

2025-04-07T07:38:24Z

Adapt to changes in commit 9133607de37a ("exit: fix the usage of delay_group_leader->exit_code in do_notify_parent() and pidfs_exit()"). Even if the thread-group leader exited early and succesfully it's exit status will only be reported once the whole thread-group has exited and it will share the exit code of the thread-group. So if the thread-group was SIGKILLed the thread-group leader will also be reported as having been SIGKILLed. Link: https://lore.kernel.org/r/20250403-work-pidfd-fixes-v1-1-a123b6ed6716@kernel.org Reviewed-by: Oleg Nesterov Signed-off-by: Christian Brauner

selftests/pidfd: fixes syscall number defines

2025-03-25T13:59:05Z

I had to spend some (a lot;) time to understand why pidfd_info_test (and more) fails with my patch under qemu on my machine ;) Until I applied the patch below. I think it is a bad idea to do the things like #ifndef __NR_clone3 #define __NR_clone3 -1 #endif because this can hide a problem. My working laptop runs Fedora-23 which doesn't have __NR_clone3/etc in /usr/include/. So "make" happily succeeds, but everything fails and it is not clear why. Link: https://lore.kernel.org/r/20250323174518.GB834@redhat.com Signed-off-by: Christian Brauner

selftests/pidfd: third test for multi-threaded exec polling

2025-03-20T14:32:43Z

Ensure that during a multi-threaded exec and premature thread-group leader exit no exit notification is generated. Link: https://lore.kernel.org/r/20250320-work-pidfs-thread_group-v4-4-da678ce805bf@kernel.org Signed-off-by: Christian Brauner

selftests/pidfd: second test for multi-threaded exec polling

2025-03-20T14:32:43Z

Ensure that during a multi-threaded exec and premature thread-group leader exit no exit notification is generated. Link: https://lore.kernel.org/r/20250320-work-pidfs-thread_group-v4-3-da678ce805bf@kernel.org Signed-off-by: Christian Brauner

selftests/pidfd: first test for multi-threaded exec polling

2025-03-20T14:32:43Z

Add first test for premature thread-group leader exit. Link: https://lore.kernel.org/r/20250320-work-pidfs-thread_group-v4-2-da678ce805bf@kernel.org Signed-off-by: Christian Brauner

selftests/pidfd: add seventh PIDFD_INFO_EXIT selftest

2025-03-05T12:26:21Z

Add a selftest for PIDFD_INFO_EXIT behavior. Link: https://lore.kernel.org/r/20250305-work-pidfs-kill_on_last_close-v3-16-c8c3d8361705@kernel.org Signed-off-by: Christian Brauner