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Re: [PATCH 0/5] Make /sys/class/net per net namespace objects belong to container

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From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Date: Tue, 16 Aug 2016 15:33:10 -0700

> There are objects in /sys hierarchy (/sys/class/net/) that logically belong
> to a namespace/container. Unfortunately all sysfs objects start their life
> belonging to global root, and while we could change ownership manually,
> keeping tracks of all objects that come and go is cumbersome. It would
> be better if kernel created them using correct uid/gid from the beginning.
> 
> This series changes kernfs to allow creating object's with arbitrary
> uid/gid, adds get_ownership() callback to ktype structure so subsystems
> could supply their own logic (likely tied to namespace support) for
> determining ownership of kobjects, and adjusts sysfs code to make use of
> this information. Lastly net-sysfs is adjusted to make sure that objects in
> net namespace are owned by the root user from the owning user namespace.
> 
> Note that we do not adjust ownership of objects moved into a new namespace
> (as when moving a network device into a container) as userspace can easily
> do it.

As shown by the kbuild robot, this fails to build when CONFIG_SYSFS
it disabled.

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[PATCH 0/5] Make /sys/class/net per net namespace objects belong to container Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2016-08-17 00:40 +0200
  [PATCH 5/5] net-sysfs: make sure objects belong to contrainer's owner Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2016-08-17 00:40 +0200
    Re: [PATCH 5/5] net-sysfs: make sure objects belong to contrainer's  owner kbuild test robot <lkp@intel.com> - 2016-08-22 08:10 +0200
  [PATCH 2/5] sysfs, kobject: allow creating kobject belonging to arbitrary users Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2016-08-17 00:40 +0200
  [PATCH 3/5] kobject: kset_create_and_add() - fetch ownership info from parent Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2016-08-17 00:40 +0200
  [PATCH 4/5] driver core: set up ownership of class devices in sysfs Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2016-08-17 00:40 +0200
    Re: [PATCH 4/5] driver core: set up ownership of class devices in  sysfs Stephen Hemminger <stephen@networkplumber.org> - 2016-08-20 04:30 +0200
  [PATCH 1/5] kernfs: allow creating kernfs objects with arbitrary uid/gid Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2016-08-17 00:40 +0200
  Re: [PATCH 0/5] Make /sys/class/net per net namespace objects  belong to container David Miller <davem@davemloft.net> - 2016-08-20 02:00 +0200
  Re: [PATCH 0/5] Make /sys/class/net per net namespace objects  belong to container David Miller <davem@davemloft.net> - 2016-08-22 08:50 +0200
    Re: [PATCH 0/5] Make /sys/class/net per net namespace objects belong  to container Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2016-08-22 18:30 +0200

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