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Bug 2037588

Summary: ls: cannot access '/sys/bus/pci/devices/0003:01:00.0/net': No such file or directory
Product: Red Hat Enterprise Linux 8 Reporter: Gu Nini <ngu>
Component: rdma-coreAssignee: Kamal Heib <kheib>
Status: CLOSED WONTFIX QA Contact: Infiniband QE <infiniband-qe>
Severity: high Docs Contact: Jaroslav Klech <jklech>
Priority: high    
Version: 8.6CC: jklech, kheib, lijin, mdeng, rdma-dev-team, xuma
Target Milestone: rcKeywords: Regression
Target Release: 8.6Flags: pm-rhel: mirror+
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Known Issue
Doc Text:
.Additionally install the `rdma-core` base-package to automatically enable kernel modules for RDMA hardware In this RHEL 8 release, the-base package dependency for all sub-packages of `rdma-core` was removed. The change was to ensure that users of containers, who do not have Remote Direct Memory Access (RDMA) hardware, get a minimal container image size. As a consequence, after installing the latest `infiniband-diags` sub-package, there is no `/sys/bus/pci/devices/<DEVICE_ID>/net/` directory. To work around this problem, you need to additionally install the base `rdma-core` package. This package provides `systemd udev` rules for RDMA kernel modules loading. As a result, the problem no longer manifests in the described scenario.
 Story Points: ---
Clone Of: Environment:
Last Closed: 2023-07-06 07:28:06 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Attachments:
Description Flags
Detail_test_log-01062022 none

Description Gu Nini 2022-01-06 02:48:02 UTC 
Created attachment 1849140 [details]
Detail_test_log-01062022

Description of problem:
It's found with infiniband-diags-37.1-1.el8.ppc64le, there is no subdirectory 'net' under directory '/sys/bus/pci/devices/0003:01:00.0/', so no the infiniband interface ib*. While once unindtall the package and install the old version infiniband-diags-35.0-1.el8.ppc64le, it works.

Version-Release number of selected component (if applicable):
Host compose: RHEL-8.6.0-20220104.3
Host kernel: 4.18.0-357.el8.ppc64le
infiniband-diags-37.1-1.el8.ppc64le

How reproducible:
100%

Steps to Reproduce:
1. Make sure the host is with infiniband card:

# lspci|grep Infini
0003:01:00.0 Infiniband controller: Mellanox Technologies MT28800 Family [ConnectX-5 Ex]
0003:01:00.1 Infiniband controller: Mellanox Technologies MT28800 Family [ConnectX-5 Ex]
[root@ibm-p9wr-08 ~]# ls /sys/bus/pci/devices/0003:01:00.0/net

2. Install the latest infiniband-diags package:

# yum install infiniband-diags -y
# modprobe ib_umad

3. Check the infiniband mode interface:

# ls /sys/bus/pci/devices/0003:01:00.0/net
ls: cannot access '/sys/bus/pci/devices/0003:01:00.0/net': No such file or directory
# ip address show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: enP5p1s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 70:e2:84:14:28:62 brd ff:ff:ff:ff:ff:ff
    inet 10.16.214.80/23 brd 10.16.215.255 scope global dynamic noprefixroute enP5p1s0f0
       valid_lft 77709sec preferred_lft 77709sec
    inet6 2620:52:0:10d6:72e2:84ff:fe14:2862/64 scope global dynamic noprefixroute 
       valid_lft 2591957sec preferred_lft 604757sec
    inet6 fe80::72e2:84ff:fe14:2862/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
3: enP5p1s0f1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 70:e2:84:14:28:63 brd ff:ff:ff:ff:ff:ff
4: enp1s0f0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
    link/ether 98:be:94:0d:f6:20 brd ff:ff:ff:ff:ff:ff
5: enp1s0f1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
    link/ether 98:be:94:0d:f6:21 brd ff:ff:ff:ff:ff:ff
6: enp1s0f2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
    link/ether 98:be:94:0d:f6:22 brd ff:ff:ff:ff:ff:ff
7: enp1s0f3: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
    link/ether 98:be:94:0d:f6:23 brd ff:ff:ff:ff:ff:ff


Actual results:
There is no subdirectory 'net' under directory '/sys/bus/pci/devices/0003:01:00.0/', so no the infiniband interface ib*.

Expected results:
The interface exists.
# ls /sys/bus/pci/devices/0003:01:00.0/net
ib0
# ip address show
......
8: ib0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 4092 qdisc mq state DOWN group default qlen 256
    link/infiniband 00:00:11:07:fe:80:00:00:00:00:00:00:24:8a:07:03:00:a4:72:5c brd 00:ff:ff:ff:ff:12:40:1b:ff:ff:00:00:00:00:00:00:ff:ff:ff:ff
9: ib1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 4092 qdisc mq state DOWN group default qlen 256
    link/infiniband 00:00:19:07:fe:80:00:00:00:00:00:00:24:8a:07:03:00:a4:72:5d brd 00:ff:ff:ff:ff:12:40:1b:ff:ff:00:00:00:00:00:00:ff:ff:ff:ff
[root@ibm-p9wr-08 ~]# rpm -qa|grep infiniband

Additional info:
Comment 1 Honggang LI 2022-01-06 11:36:46 UTC 
Hi,

I checked the attachment  Detail_test_log-01062022 . It seems rdma-core was not installed.

Could you please try with infiniband-diags-37.1-1.el8.ppc64le and rdma-core-37.1-1.el8.ppc64le?
Comment 15 RHEL Program Management 2023-07-06 07:28:06 UTC 
After evaluating this issue, there are no plans to address it further or fix it in an upcoming release.  Therefore, it is being closed.  If plans change such that this issue will be fixed in an upcoming release, then the bug can be reopened.