Andrey Vagin 6786741dbf nsfs: add ioctl to get an owning user namespace for ns file descriptor ... Each namespace has an owning user namespace and now there is not way to discover these relationships. Understending namespaces relationships allows to answer the question: what capability does process X have to perform operations on a resource governed by namespace Y? After a long discussion, Eric W. Biederman proposed to use ioctl-s for this purpose. The NS_GET_USERNS ioctl returns a file descriptor to an owning user namespace. It returns EPERM if a target namespace is outside of a current user namespace. v2: rename parent to relative v3: Add a missing mntput when returning -EAGAIN --EWB Acked-by: Serge Hallyn <serge@hallyn.com> Link: https://lkml.org/lkml/2016/7/6/158 Signed-off-by: Andrei Vagin <avagin@openvz.org> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>		2016-09-22 19:59:40 -05:00
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asm-generic	asm-generic: Drop renameat syscall from default list	2016-05-05 00:42:21 +02:00
drm	Merge tag 'topic/drm-misc-2016-07-22' of git://anongit.freedesktop.org/drm-intel into drm-next	2016-07-27 10:33:08 +10:00
linux	nsfs: add ioctl to get an owning user namespace for ns file descriptor	2016-09-22 19:59:40 -05:00
misc	cxl: Add mechanism for delivering AFU driver specific events	2016-06-28 18:34:56 +10:00
mtd	mtd: kill the nand_ecclayout struct	2016-05-05 23:51:51 +02:00
rdma	Second round of merge items for 4.8	2016-08-04 20:26:31 -04:00
scsi	cxlflash: Fix to avoid virtual LUN failover failure	2016-01-06 20:50:08 -05:00
sound	ALSA: uapi: Add three missing header files to Kbuild file	2016-05-31 17:33:32 +02:00
video
xen	xen/evtchn: add IOCTL_EVTCHN_RESTRICT	2016-07-25 10:59:31 +01:00
Kbuild