[libvirt-users] Question about setns recognising in libvirt autoconf

[hzguanqiang at corp.netease.com]

Hi Gaofeng,
It seems that I've got the answer.
In manual page about setns, it said that library support was added to glibc
in version 2.14 while my libc version is 2.13.

Thanks for help anyway.

On 2013-12-09 13:22 , hzguanqiang at corp.netease.com wrote:
On 2013-12-09 13:18 , Gao feng wrote:
On 12/09/2013 01:06 PM, hzguanqiang at corp.netease.com wrote:
> Hi experts,
>  
> When I test lxc container with lxc-enter-namespace command, It reported an error as
> following:
> root at debian:~/github/libvirt# vir lxc-enter-namespace lxc --noseclabel /bin/df -hl
> error: Cannot get namespaces for 3145: Function not implemented
>  
> It seems that setns is not supported by my kernel.
>  
> But from the following info, It seemed the reason is just libvirt/autoconf doesn't
> recgonise setns.
> root at debian:~/github/libvirt# grep setns /proc/kallsyms
> ffffffff8105b78b T SyS_setns
> ffffffff8105b78b T sys_setns
> root at debian:~/github/libvirt# ./configure | grep setns
> checking for setns... no
>  
> What the problem really is ? How can I fix this problem?

What's the result of grep -R "setns" /usr/include/*


Hi Gaofeng,
The result you want is as following:

root at debian:~/github/libvirt# grep -R "setns" /usr/include/*
/usr/include/asm-generic/unistd.h:#define __NR_setns 268
/usr/include/asm-generic/unistd.h:__SYSCALL(__NR_setns, sys_setns)
/usr/include/x86_64-linux-gnu/bits/syscall.h:#define SYS_setns __NR_setns
/usr/include/x86_64-linux-gnu/asm/unistd_64.h:#define __NR_setns                                308
/usr/include/x86_64-linux-gnu/asm/unistd_64.h:__SYSCALL(__NR_setns, sys_setns)
/usr/include/x86_64-linux-gnu/asm/unistd_32.h:#define __NR_setns                346

------------------     
Best regards!
GuanQiang
13:21:12


------------------     
Best regards!
GuanQiang
14:25:56
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