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Check the existence of /sys/bus/ccwgroup/devices/*/online beforehand

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Resolves: bz1982474
Upstream: Fedora
Conflict: None

commit b2bbb54d89
Author: Coiby Xu <coxu@redhat.com>
Date:   Thu Jul 15 09:18:33 2021 +0800

    Check the existence of /sys/bus/ccwgroup/devices/*/online beforehand

    On s390x KVM machines, the following errors would show when building kdump
    initramfs that dumps vmcore to a remote target,
        $ kdumpctl rebuild
        /usr/lib/dracut/modules.d/99kdumpbase/module-setup.sh: line 475: /sys/bus/ccwgroup/devices/online: No such file or directory
        /usr/lib/dracut/modules.d/99kdumpbase/module-setup.sh: line 476: [: -ne: unary operator expected

    This happens because s390x KVM machines use virtual network and
    /sys/bus/ccwgroup/devices/ exists but is empty. Fix it by check
    the existence of file "/sys/bus/ccwgroup/devices/*/online".

    Fixes: commit 7d47251568
           ("Iterate /sys/bus/ccwgroup/devices to tell if we should set up rd.znet")

    BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1982474
    Reported-by: Jie Li <jieli@redhat.com>
    Signed-off-by: Coiby Xu <coxu@redhat.com>
    Acked-by: Kairui Song <kasong@redhat.com>

Signed-off-by: Coiby Xu <coxu@redhat.com>
This commit is contained in:
Coiby Xu 2021-07-21 17:23:54 +08:00 committed by Coiby Xu
parent 3f28dc72a2
commit d4de3e9dcc
1 changed files with 1 additions and 0 deletions
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1
dracut-module-setup.sh
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@ -462,6 +462,7 @@ find_online_znet_device() {
NETWORK_DEVICES=$(find $CCWGROUPBUS_DEVICEDIR)
for d in $NETWORK_DEVICES
do
[ ! -f "$d/online" ] && continue
read ONLINE < $d/online
if [ $ONLINE -ne 1 ]; then
continue