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