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From f055e5126f7d28553c3886a865e5f13fdc4c18d2 Mon Sep 17 00:00:00 2001
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From: Xunlei Pang <xlpang@redhat.com>
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Date: Mon, 25 Sep 2017 11:18:06 +0800
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Subject: [PATCH] fcoe: handle CNAs with DCB firmware support
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Some Combined Network Adapters(CNAs) implement DCB protocol
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in firmware, it is recommended that do not run software-based
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DCB or LLDP on CNAs that implement DCB, but we have to start
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the lldpad service anyway(there might be other software DCB).
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If the network interface provides hardware DCB/DCBX capabilities,
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the field DCB_REQUIRED in "/etc/fcoe/cfg-xxx" is expected to
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be set to "no".
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We met an issue on "QLogic BCM57810" with DCB firmware support,
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and found dracut still generated "fcoe=<mac>:dcb" which caused
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kdump boot failure when using that fcoe dump target.
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This patch parses /etc/fcoe/cfg-xxx to detect DCB_REQUIRED="no",
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and force "nodcb" if it is the case.
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Also improved some coding style in passing.
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Signed-off-by: Xunlei Pang <xlpang@redhat.com>
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Cherry-picked from: 795256bbb
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Resolves: #1442663
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---
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modules.d/95fcoe/module-setup.sh | 26 ++++++++++++++++++++------
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1 file changed, 20 insertions(+), 6 deletions(-)
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diff --git a/modules.d/95fcoe/module-setup.sh b/modules.d/95fcoe/module-setup.sh
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index 4bab0c7d..ac27c76a 100755
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--- a/modules.d/95fcoe/module-setup.sh
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+++ b/modules.d/95fcoe/module-setup.sh
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@@ -51,16 +51,30 @@ cmdline() {
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read mac < ${i}/address
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s=$(dcbtool gc ${i##*/} dcb | sed -n 's/^DCB State:\t*\(.*\)/\1/p')
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if [ -z "$s" ] ; then
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- p=$(get_vlan_parent ${i})
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- if [ "$p" ] ; then
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- s=$(dcbtool gc ${p} dcb | sed -n 's/^DCB State:\t*\(.*\)/\1/p')
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- fi
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+ p=$(get_vlan_parent ${i})
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+ if [ "$p" ] ; then
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+ s=$(dcbtool gc ${p} dcb | sed -n 's/^DCB State:\t*\(.*\)/\1/p')
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+ fi
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fi
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if [ "$s" = "on" ] ; then
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- dcb="dcb"
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+ dcb="dcb"
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else
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- dcb="nodcb"
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+ dcb="nodcb"
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fi
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+
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+ # Some Combined Network Adapters(CNAs) implement DCB in firmware.
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+ # Do not run software-based DCB or LLDP on CNAs that implement DCB.
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+ # If the network interface provides hardware DCB/DCBX capabilities,
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+ # DCB_REQUIRED in "/etc/fcoe/cfg-xxx" is expected to set to "no".
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+ #
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+ # Force "nodcb" if there's any DCB_REQUIRED="no"(child or vlan parent).
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+ grep -q "^[[:blank:]]*DCB_REQUIRED=\"no\"" /etc/fcoe/cfg-${i##*/} &>/dev/null
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+ [ $? -eq 0 ] && dcb="nodcb"
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+ if [ "$p" ] ; then
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+ grep -q "^[[:blank:]]*DCB_REQUIRED=\"no\"" /etc/fcoe/cfg-${p} &>/dev/null
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+ [ $? -eq 0 ] && dcb="nodcb"
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+ fi
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+
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echo "fcoe=${mac}:${dcb}"
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done
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}
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