lkml.org 
[lkml]   [2014]   [Jun]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH RFC net-next 03/14] bpf: introduce syscall(BPF, ...) and BPF maps
From
On Fri, Jun 27, 2014 at 5:16 PM, Andy Lutomirski <luto@amacapital.net> wrote:
> On Fri, Jun 27, 2014 at 5:05 PM, Alexei Starovoitov <ast@plumgrid.com> wrote:
>> BPF syscall is a demux for different BPF releated commands.
>>
>> 'maps' is a generic storage of different types for sharing data between kernel
>> and userspace.
>>
>> The maps can be created/deleted from user space via BPF syscall:
>> - create a map with given id, type and attributes
>> map_id = bpf_map_create(int map_id, map_type, struct nlattr *attr, int len)
>> returns positive map id or negative error
>>
>> - delete map with given map id
>> err = bpf_map_delete(int map_id)
>> returns zero or negative error
>
> What's the scope of "id"? How is it secured?

the map and program id space is global and it's cap_sys_admin only.
There is no pressing need to do it with per-user limits.
So the whole thing is root only for now.

Since I got your attention please review the most interesting
verifier bits (patch 08/14) ;)


\
 
 \ /
  Last update: 2014-06-28 08:41    [W:0.328 / U:0.292 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site