From 74e1022faed8462d2ae4d97e6d7ad27e49cf60a8 Mon Sep 17 00:00:00 2001
From: Coiby Xu <coxu@redhat.com>
Date: May 09 2024 05:41:05 +0000
Subject: Install the driver of physical device for a SR-IOV virtual device


Related: https://issues.redhat.com/browse/RHEL-7028
Conflict: None

Upstream Status: git@github.com:rhkdump/kdump-utils.git

commit 7a8edc8de67dccae23b01461bc3b17c0ad42aa5f
Author: Coiby Xu <coxu@redhat.com>
Date:   Wed Sep 27 09:31:39 2023 +0800

    Install the driver of physical device for a SR-IOV virtual device

    Currently, network dumping failed over a NIC that is a Single Root I/O
    Virtualization (SR-IOV) virtual device. Usually the driver of the
    virtual device won't specify the dependency on the driver of the
    physical device. So to fix this issue, the driver of the physical device
    needs to be found and installed as well.

    Fixes: a65dde2d ("Reduce kdump memory consumption by only installing needed NIC drivers")
    Signed-off-by: Coiby Xu <coxu@redhat.com>

Signed-off-by: Coiby Xu <coxu@redhat.com>

---

diff --git a/dracut-module-setup.sh b/dracut-module-setup.sh
index 454e8b0..6af8f3b 100755
--- a/dracut-module-setup.sh
+++ b/dracut-module-setup.sh
@@ -391,6 +391,14 @@ _get_hpyerv_physical_driver() {
     _get_nic_driver "$_physical_nic"
 }
 
+_get_physical_function_driver() {
+    local _physfn_dir=/sys/class/net/"$1"/device/physfn
+
+    if [[ -e "$_physfn_dir" ]]; then
+        basename "$(readlink -f "$_physfn_dir"/driver)"
+    fi
+}
+
 kdump_install_nic_driver() {
     local _netif _driver _drivers
 
@@ -418,6 +426,9 @@ kdump_install_nic_driver() {
         fi
 
         _drivers+=("$_driver")
+        # For a Single Root I/O Virtualization (SR-IOV) virtual device,
+        # the driver of physical device needs to be installed as well
+        _drivers+=("$(_get_physical_function_driver "$_netif")")
     done
 
     [[ -n ${_drivers[*]} ]] || return