Description of problem:

When dumping vmcore to SSH/NFS target, the kdump initramfs includes NIC drivers for inactive interfaces. Take NFS target as an example, this is how the problem occurs,
1. 'mount "xx.xx.xx.xx:/path /kdumproot nfs defaults"' will be passed to dracut by mkdumprd
2. dracut will eventually run "/usr/lib/dracut/dracut-install -D /tmp/initramfs/ -H --kerneldir /lib/modules/5.10.22-200.fc33.x86_64/ -o -m =drivers/net/ethernet". "-H" means only including host drivers and "=drivers/net/ethernet" means including all drivers in drivers/net/ethernet. So the system have multiple NICs, all host drivers in drivers/net/ethernet will be copied to the initramfs.

Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:


1. Find a system with multiple NICs, e.g. hp-z8-g4-01.khw2.lab.eng.bos.redhat.com

[root@hp-z8-g4-01 net]# ip addr 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: enp9s0f2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether a0:8c:fd:dd:ca:be brd ff:ff:ff:ff:ff:ff
3: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether a0:8c:fd:dd:ca:bc brd ff:ff:ff:ff:ff:ff
    inet 10.16.210.50/23 brd 10.16.211.255 scope global dynamic noprefixroute eno1
       valid_lft 82797sec preferred_lft 82797sec
    inet6 2620:52:0:10d2:a28c:fdff:fedd:cabc/64 scope global dynamic noprefixroute 
       valid_lft 2591952sec preferred_lft 604752sec
    inet6 fe80::a28c:fdff:fedd:cabc/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
4: ens5: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
    link/ether a0:fb:fd:dd:ca:bf brd ff:ff:ff:ff:ff:ff

[root@hp-z8-g4-01 net]# readlink /sys/class/net/{enp9s0f2,eno1,ens5}/device/driver/module
../../../../module/i40e
../../../../module/e1000e
../../../../module/e1000e


2. Configure kdump to dump to a NFS target
3. Run "kdumpctl rebuild"
[root@hp-z8-g4-01 ~]# kdumpctl rebuild
kdump: Rebuilding /boot/initramfs-4.18.0-287.el8.dt4.x86_64kdump.img

4. In the build initramfs, you will find all NIC drivers are included. For hp-z8-g4-01.khw2.lab.eng.bos.redhat.com, 

[root@hp-z8-g4-01 t]# lsinitrd --unpack /boot/initramfs-4.18.0-287.el8.dt4.x86_64kdump.img

[root@hp-z8-g4-01 t]# unsquashfs squash/root.img 
[root@hp-z8-g4-01 t]# cd squashfs-root/usr/lib/modules/4.18.0-287.el8.dt4.x86_64/kernel/drivers/net
[root@hp-z8-g4-01 net]# tree
.
├── ethernet
│   └── intel
│       ├── e1000e
│       │   └── e1000e.ko.xz
│       └── i40e
│           └── i40e.ko.xz


Actual results:

kdump initramfs includes drivers for inactive NICs.

Expected results:

The initramfs should only include drivers that are needed by kdump.

Additional info:

1. This bug is reproducible on Fedora 33, lenovo-sr630-02.rhts.eng.pek2.redhat.com.
2. It should be reproducible on REHL8.5 and RHEL9.
3. For dell-per740-55.rhts.eng.pek2.redhat.com, although there are two NICs, the other driver is in drivers/staging/qlge instead of in drivers/net/ethernet so it's not copied to the kdump initramfs.