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Date: Wed, 3 Nov 2010 22:19:12 +0530
From: <Narendra_K@...l.com>
To: <linux-hotplug@...r.kernel.org>
CC: <netdev@...r.kernel.org>, <Matt_Domsch@...l.com>,
<Jordan_Hargrave@...l.com>, <Charles_Rose@...l.com>
Subject: [PATCH 0/1] UDEV - Rename onboard network interfaces to lomN if the
user so desires
Hello,
This patch adds support to udev's dynamic rule generation mechanism to
rename onboard network interfaces to lom1, lom2 etc if the user so
desires. (Please refer to this for more information -
http://marc.info/?l=linux-netdev&m=128646170613973&w=3).
From: Narendra K <narendra_k@...l.com>
Subject: [PATCH] UDEV - Rename onboard network interfaces to lomN if the user so desires
This patch adds support to udev's dynamic rule generation mechanism to
rename onboard network interfaces to lom1, lom2 etc if the user so
desires. (Please refer to this for more information -
http://marc.info/?l=linux-netdev&m=128646170613973&w=3).
It introduces a commad line parameter 'udevlom', which when passed
would rename onboard network interfaces to lomN. It would also generate
corresponding rules to make the names persistent across reboots.
With this patch, interface with firmware index=1 will be renamed to lom1,
index=2 will be rename to lom2 etc.(lom - Lan-On-Motherboard)
This patch is against Fedora 14 udev (version:161 release:4.fc14).
It requires the upstream commit 911e1c9b05a8e3559a7aa89083930700a0b9e7ee
for the firmware index to be available in sysfs.
With the patch applied, the network interfaces look like this on a
Dell PowerEdge R710 with four BCM5709 onboard NICs with firmware
indexes and four add-in interfaces.
[root@...ora-14-r710 ~]# ls /sys/class/net/
eth4 eth5 eth6 eth7 eth8 lo lom1 lom2 lom3 lom4
/etc/udev/rules.d/70-persistent-net.rules would look like this -
[snippet attched]
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:24:e8:2e:df:01", ATTR{dev_id}=="0x0", ATTR{type}=="1", ATTRS{index}=="2", KERNEL=="eth*", NAME="lom2"
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:15:17:15:9b:eb", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth4"
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:24:e8:2e:df:05", ATTR{dev_id}=="0x0", ATTR{type}=="1", ATTRS{index}=="4", KERNEL=="eth*", NAME="lom4"
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:24:e8:2e:df:03", ATTR{dev_id}=="0x0", ATTR{type}=="1", ATTRS{index}=="3", KERNEL=="eth*", NAME="lom3"
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:24:e8:2e:de:ff", ATTR{dev_id}=="0x0", ATTR{type}=="1", ATTRS{index}=="1", KERNEL=="eth*", NAME="lom1"
Signed-off-by: Narendra K <narendra_k@...l.com>
---
.../75-persistent-net-generator.rules | 4 ++++
extras/rule_generator/write_net_rules | 15 ++++++++++++++-
2 files changed, 18 insertions(+), 1 deletions(-)
diff --git a/extras/rule_generator/75-persistent-net-generator.rules b/extras/rule_generator/75-persistent-net-generator.rules
index 8119d0e..e138bd3 100644
--- a/extras/rule_generator/75-persistent-net-generator.rules
+++ b/extras/rule_generator/75-persistent-net-generator.rules
@@ -7,6 +7,7 @@
# MATCHID bus_id used for the match
# MATCHDRV driver name used for the match
# MATCHIFTYPE interface type match
+# MATCHINDEX firmware index used for the match
# COMMENT comment to add to the generated rule
# INTERFACE_NAME requested name supplied by external tool
# INTERFACE_NEW new interface name returned by rule writer
@@ -29,6 +30,9 @@ ENV{MATCHADDR}="$attr{address}"
# match interface type
ENV{MATCHIFTYPE}="$attr{type}"
+#read firmware index
+ATTRS{index}=="?*", ENV{MATCHINDEX}="$attr{index}"
+
# ignore KVM virtual interfaces
ENV{MATCHADDR}=="54:52:00:*", GOTO="persistent_net_generator_end"
diff --git a/extras/rule_generator/write_net_rules b/extras/rule_generator/write_net_rules
index 4379792..40aaa4b 100644
--- a/extras/rule_generator/write_net_rules
+++ b/extras/rule_generator/write_net_rules
@@ -11,6 +11,7 @@
# MATCHDEVID dev_id used for the match
# MATCHDRV driver name used for the match
# MATCHIFTYPE interface type match
+# MATCHINDEX firmware index used for the match
# COMMENT comment to add to the generated rule
# INTERFACE_NAME requested name supplied by external tool
# INTERFACE_NEW new interface name returned by rule writer
@@ -72,7 +73,11 @@ write_rule() {
echo ""
[ "$comment" ] && echo "# $comment"
- echo "SUBSYSTEM==\"net\", ACTION==\"add\"$match, NAME=\"$name\""
+ if [ "$MATCHINDEX" -a "$UDEVLOM" ]; then
+ echo "SUBSYSTEM==\"net\", ACTION==\"add\"$match, NAME=\"lom$MATCHINDEX\""
+ else
+ echo "SUBSYSTEM==\"net\", ACTION==\"add\"$match, NAME=\"$name\""
+ fi
} >> $RULES_FILE
}
@@ -108,6 +113,10 @@ if [ "$MATCHIFTYPE" ]; then
match="$match, ATTR{type}==\"$MATCHIFTYPE\""
fi
+if [ "$MATCHINDEX" -a "$UDEVLOM" ]; then
+ match="$match, ATTRS{index}==\"$MATCHINDEX\""
+fi
+
if [ -z "$match" ]; then
echo "missing valid match" >&2
unlock_rules_file
@@ -134,6 +143,10 @@ else
fi
fi
+if [ "$MATCHINDEX" -a "$UDEVLOM" ]; then
+ echo "INTERFACE_NEW=lom$MATCHINDEX"
+fi
+
write_rule "$match" "$INTERFACE" "$COMMENT"
unlock_rules_file
--
1.7.3.1
With regards,
Narendra K
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