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Bug 1995082 - failed loading xdp program in netns
Summary: failed loading xdp program in netns
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: iproute
Version: 8.5
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: beta
: ---
Assignee: Andrea Claudi
QA Contact: Mingyu Shi
URL:
Whiteboard:
Depends On:
Blocks: 2009640
TreeView+ depends on / blocked
 
Reported: 2021-08-18 12:13 UTC by Mingyu Shi
Modified: 2021-11-10 07:49 UTC (History)
5 users (show)

Fixed In Version: iproute-5.12.0-4.el8
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
: 2009640 (view as bug list)
Environment:
Last Closed: 2021-11-09 19:37:07 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHELPLAN-94103 0 None None None 2021-08-19 14:09:39 UTC
Red Hat Product Errata RHBA-2021:4389 0 None None None 2021-11-09 19:37:23 UTC

Description Mingyu Shi 2021-08-18 12:13:59 UTC 
Description of problem:
Similar with https://bugzilla.redhat.com/show_bug.cgi?id=1990402 , the action doesn't work when is in a netns

Version-Release number of selected component (if applicable):
iproute-5.12.0-2.el8.x86_64

How reproducible:
100%

Steps to Reproduce:
dnf install -y kernel-selftests-internal
cd /usr/libexec/kselftests/net
ip link add type veth
ip netns add ns0
ip link set veth0 netns ns0
ip netns exec ns0 bash # enter ns0
ip link set dev veth0 xdp object ../bpf/xdp_dummy.o section xdp_dummy

Actual results:
Continuing without mounted eBPF fs. Too old kernel?
mkdir (null)/globals failed: No such file or directory

Expected results:
No failure

Additional info:
Comment 1 Andrea Claudi 2021-09-20 17:02:40 UTC 
Jiri and Toke provided an in-depth analysis for this issue and a fix on bz#2005346.
Comment 6 Andrea Claudi 2021-09-21 09:43:05 UTC 
Fix submitted upstream: https://patchwork.kernel.org/project/netdevbpf/patch/617d61727a8c73fd28a1eb4136f8159f7f6779d9.1632216695.git.aclaudi@redhat.com/
Comment 7 Andrea Claudi 2021-09-30 09:55:42 UTC 
Fix accepted upstream. A brew build containing it and ready for test is here: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=39993423
Comment 11 Mingyu Shi 2021-10-08 06:23:42 UTC 
# enter netns ns0 and load the file successfully:
[14:19:13@mshi-850 ~]0# cd /usr/libexec/kselftests/net
[14:19:20@mshi-850 /usr/libexec/kselftests/net]0# ip netns exec ns0 bash # enter ns0
bash: .bkrconfig: No such file or directory
[root@mshi-850 net]# ip link set dev veth0 xdp object ../bpf/xdp_dummy.o section xdp_dummy
[root@mshi-850 net]# exit

[14:20:02@mshi-850 /usr/libexec/kselftests/net]1# ip link set dev veth1 xdp object ../bpf/xdp_dummy.o section xdp_dummy
[14:20:14@mshi-850 /usr/libexec/kselftests/net]0# ip l
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
    link/ether 52:54:00:82:ab:62 brd ff:ff:ff:ff:ff:ff
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
    link/ether 52:54:00:50:ca:94 brd ff:ff:ff:ff:ff:ff
6: bond101: <NO-CARRIER,BROADCAST,MULTICAST,MASTER,UP> mtu 1500 qdisc noqueue master ovs-system state DOWN mode DEFAULT group default qlen 1000
    link/ether 42:9c:b5:e8:f6:32 brd ff:ff:ff:ff:ff:ff
7: ovs-system: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether f6:65:99:ed:ec:a3 brd ff:ff:ff:ff:ff:ff
9: veth1@if8: <BROADCAST,MULTICAST> mtu 1500 xdp qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether a2:9b:0e:a1:27:ac brd ff:ff:ff:ff:ff:ff link-netns ns0
    prog/xdp id 12 tag 3fed666785a57e53 jited 
[14:20:17@mshi-850 /usr/libexec/kselftests/net]0# ip link set dev veth2 xdp object ../bpf/xdp_dummy.o section xdp_dummy
Cannot find device "veth2"
[14:20:22@mshi-850 /usr/libexec/kselftests/net]1# rpm -q iproute
iproute-5.12.0-4.el8.x86_64
Comment 14 Mingyu Shi 2021-10-08 10:10:37 UTC 
Same with #comment11
Comment 16 errata-xmlrpc 2021-11-09 19:37:07 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (iproute bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2021:4389
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