unshare userns in addition to mntns and verify that:
1. watching tmpfs mounted inside userns is allowed with any mark type
2. watching orig root with filesystem mark type is not allowed
3. watching mntns of orig userns is not allowed
4. watching mntns in userns where fanotify_init was called is allowed
mount events are only tested with the last case of mntns mark.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Link: https://lore.kernel.org/20250509133240.529330-9-amir73il@gmail.com
Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Add helper to utils.c and use it in mount-notify and statmount tests.
Linking with utils.c drags in a dependecy with libcap, so add it to the
Makefile of the tests.
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Link: https://lore.kernel.org/20250509133240.529330-7-amir73il@gmail.com
Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Copy the fanotify uapi header files to the tools include dir
and define __kernel_fsid_t to decouple dependency with headers_install
and then remove the redundant re-definitions of fanotify macros.
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Link: https://lore.kernel.org/20250509133240.529330-6-amir73il@gmail.com
Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
