[dpdk-dev] sysfs permission problem when running dpdk app in lxc

[Moon-Sang Lee]

I found many other guys face the same issue as mine, but no replies to
their question.
Anyway, there are three major option groups including apparmor, seccome,
and cgroup.
It seems that some security options of lxc prevent my DPDK app from opening
sysfs file in RW mode.
I changed lxc.aa_profile to unconfied, and that resolved my issue.



On Mon, Sep 5, 2016 at 2:33 PM, Moon-Sang Lee <sang0627 at gmail.com> wrote:

>
> I'm using ubuntu 16.04 LTS as my host and installed lxd on it.
> When I try to run my dpdk(2.2.0) app in the container, I got following
> error message.
>
> EAL: lcore 9 is ready (tid=17fd700;cpuset=[9])
> EAL: lcore 3 is ready (tid=c915700;cpuset=[3])
> EAL: lcore 11 is ready (tid=ffc700;cpuset=[11])
> EAL: lcore 5 is ready (tid=27ff700;cpuset=[5])
> EAL: lcore 7 is ready (tid=1ffe700;cpuset=[7])
> EAL: lcore 13 is ready (tid=7fb700;cpuset=[13])
> EAL: PCI device 0000:06:00.0 on NUMA socket -1
> EAL:   probe driver: 8086:10e8 rte_igb_pmd
> EAL:   Not managed by a supported kernel driver, skipped
> EAL: PCI device 0000:06:00.1 on NUMA socket -1
> EAL:   probe driver: 8086:10e8 rte_igb_pmd
> EAL:   Not managed by a supported kernel driver, skipped
> EAL: PCI device 0000:07:00.0 on NUMA socket -1
> EAL:   probe driver: 8086:10e8 rte_igb_pmd
> EAL: Cannot open /sys/class/uio/uio0/device/config: Permission denied
> EAL: Error - exiting with code: 1
>   Cause: Requested device 0000:07:00.0 cannot be used
>
>
>
> However, it seems ok of the permission when I list those files.
> I appreciate any comments.
>
> root at test4:~# cat /proc/mounts |grep sysfs
> sysfs /sys sysfs rw,relatime 0 0
> root at test4:~# ls -al /sys/class/uio/uio0/device/config
> -rw-r--r-- 1 root root 4096 Sep  5 04:56 /sys/class/uio/uio0/device/config
> root at test4:~# ls -al /dev/uio0
> crw-rw-rw- 1 root root 243, 0 Sep  5 04:16 /dev/uio0
> root at test4:~#
>
>
>
> --
> Moon-Sang Lee, SW Engineer
> Email: sang0627 at gmail.com
> Wisdom begins in wonder. *Socrates*
>



-- 
Moon-Sang Lee, SW Engineer
Email: sang0627 at gmail.com
Wisdom begins in wonder. *Socrates*