[CRIU] [PATCH v3 0/5] c/r non-dev net syctls

[Pavel Tikhomirov]

This is a try to migrate /proc/sys/net static sysctls -
the ones on netns but not per-device. The same way can be applyed
to all other static sysctls, but they need to be put on proper
namespace image.

I added full path to sysctl entry in protobuf as it is easier than
hardcoding these entries in code, and I lookup them just before dump.

Actually the test is not yet full as we need to find the right
limits for a bunch of sysctls, now I use 0-default range for most of
them, so some "high" values will not get in.

/proc/sys/net/netfilter/nf_log/xx sysctls are hard to set - see
patch 2/4 so skiping NONE case. Made fix for kernel it is in nf-next:
http://git.kernel.org/cgit/linux/kernel/git/pablo/nf-next.git/commit/?id=c6ac37d8d8843fb1fdc34e4a2a41a4f027ab670c

Touching igmp_link_local_mcast_reports is unsafe in v4.3-v4.5 kernels
so don't do it.

v2: remove non-writable in netns sysctls from test
v3: fix igmp_link_local_mcast_reports problem, add more sysctls from
kernel v4.6 to test

https://jira.sw.ru/browse/PSBM-48397

Pavel Tikhomirov (5):
  sysctl: append '\0' in sysctl_read_char
  net/sysctl: add sysctl_igmp_link_local_mcast_reports_safe check
  net/sysctl: c/r all except *.conf.* and *.neigh.*
  zdtm: add irand_range helper and use it in netns-dev test
  zdtm/sysctls: test all net.xxx except conf and neigh

 criu/include/kerndat.h              |   1 +
 criu/include/sysctl.h               |  16 ++
 criu/kerndat.c                      |  40 ++++
 criu/net.c                          | 224 ++++++++++++++++++++++
 criu/sysctl.c                       | 125 ++++++++++++-
 images/netdev.proto                 |  14 +-
 images/sysctl.proto                 |   5 +
 test/zdtm/lib/Makefile              |   2 +-
 test/zdtm/lib/randrange.c           |  36 ++++
 test/zdtm/lib/randrange.h           |  13 ++
 test/zdtm/static/Makefile           |   1 +
 test/zdtm/static/netns-dev.c        |  46 +----
 test/zdtm/static/netns-sysctls.c    | 364 ++++++++++++++++++++++++++++++++++++
 test/zdtm/static/netns-sysctls.desc |   1 +
 14 files changed, 843 insertions(+), 45 deletions(-)
 create mode 100644 test/zdtm/lib/randrange.c
 create mode 100644 test/zdtm/lib/randrange.h
 create mode 100644 test/zdtm/static/netns-sysctls.c
 create mode 100644 test/zdtm/static/netns-sysctls.desc

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2.5.5