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Subject[RFC 0/5 v3] procfs: introduce hidepid=, hidenet=, gid= mount options
This patch series adds support of procfs mount options and adds
mount options to restrict /proc/<pid>/ directories to owners and
/proc/<pid>/net/* to root. Additional group may be defined via
gid=, and this group will be privileged to study others /proc/<pid>/
and networking information.

Similar features are implemented for old kernels in -ow patches (for
Linux 2.2 and 2.4) and for Linux 2.6 in -grsecurity, but both of them
are implemented as configure options, not cofigurable in runtime, with
changes of gid of /proc/<pid>/, and without backward-compatible
/proc/<pid>/net/* handling.

The first patch introduces mount option parsing without any new options.
The second patch adds options of /proc/<pid>/ restrictions.
The third patch makes net_create() globally visible.
The fourth patch adds options of /proc/<pid>/net/ restrictions.
The fifth patch adds documentations for options above.

Vasiliy Kulikov (5):
procfs: parse mount options
procfs: add hidepid= and gid= mount options
net: restore net_create and make it globally visible
procfs: Add hidenet/nohidenet procfs mount options.
procfs: add documentation for procfs mount options

Documentation/filesystems/proc.txt | 51 ++++++++++++++++++++++
fs/proc/base.c | 62 ++++++++++++++++++++++++++-
fs/proc/inode.c | 20 +++++++++
fs/proc/internal.h | 1 +
fs/proc/proc_net.c | 26 +++++++++++
fs/proc/root.c | 83 +++++++++++++++++++++++++++++++++++-
include/linux/pid_namespace.h | 3 +
include/net/net_namespace.h | 2 +
net/core/net_namespace.c | 12 +++--
9 files changed, 253 insertions(+), 7 deletions(-)

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