On 12/09/2013 01:06 PM, hzguanqiang@corp.netease.com wrote:

> Hi experts,

>

> When I test lxc container with lxc-enter-namespace command, It reported an error as

> following:

> root@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@debian:~/github/libvirt# grep setns /proc/kallsyms

> ffffffff8105b78b T SyS_setns

> ffffffff8105b78b T sys_setns

> root@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/*

root@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