[CRIU] [PATCH v4 1/3] net/sysctl: c/r all except *.conf.* and *.neigh.*

[Pavel Emelyanov]

On 07/26/2016 06:33 PM, Pavel Tikhomirov wrote:
> 
> 
> On 07/26/2016 06:17 PM, Pavel Emelyanov wrote:
>> On 07/20/2016 05:27 PM, Pavel Tikhomirov wrote:
>>> Add array of sysctls which we need(r/w in netns) to dump by name along
>>> with their types, add NamedSysctlEntry'es to dump sysctl name+value
>>> pairs to image
>>>
>>> Skip:
>>> 1. non-(readable)writable sysctls as we can do nothing for them through
>>> procfs
>>> 2. conf and neigh directories are per-device and will be restored after
>>> devices restore separately, also they might need special care like conf
>>> sysctls need special order
>>> 3. nf_log.xx if it is "NONE" as we can not set it with sysctl_op as
>>> sysctl_write_char prints "\n" at the end and nf_log_proc_dostring does
>>> not like '\n' for now, to fix it, sent patch "[v2]netfilter: nf_log:
>>> fix error on write NONE to logger choice sysctl"
>>>
>>> Not skip: "igmp_link_local_mcast_reports" - !DANGEROUS! to use criu on
>>> kernels v4.3-v4.5, @xemul: "we just suggest one to add the fixing
>>> patch to kernel", so fixing patch is: commit 87a8a2ae65b7 ("igmp:
>>> Namespaceify igmp_llm_reports sysctl knob"), see more in RHBZ#1352177
>>>
>>> *We have now 32 such net.* sysctls writable in VZ7 CT
>>
>> How about upstream Linux kernel? What's the list of virtualized sysctls in there?
> 
> Do I missed any sysctl?

I don't know, that's why I'm asking :)

> I installed mainstream kernel from master(config 
> from fedora) and collected all r&w sysctls in net subdir except conf and 
> neigh subdirs being in net-namespace. And so I found only 116 which are 
> in these patch.

116? In mainstream kernel? OK, but what does "We have now 32 such net.*..."
mean then?

-- Pavel