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

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

[Moon-Sang Lee]

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@test4:~# cat /proc/mounts |grep sysfs
sysfs /sys sysfs rw,relatime 0 0
root@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@test4:~# ls -al /dev/uio0
crw-rw-rw- 1 root root 243, 0 Sep  5 04:16 /dev/uio0
root@test4:~#



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

Re: [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@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@test4:~# cat /proc/mounts |grep sysfs
> sysfs /sys sysfs rw,relatime 0 0
> root@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@test4:~# ls -al /dev/uio0
> crw-rw-rw- 1 root root 243, 0 Sep  5 04:16 /dev/uio0
> root@test4:~#
>
>
>
> --
> Moon-Sang Lee, SW Engineer
> Email: sang0627@gmail.com
> Wisdom begins in wonder. *Socrates*
>



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