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Date: Mon, 14 Apr 2008 12:11:18 +0100
From: David Woodhouse <dwmw2@...radead.org>
To: Marco d'Itri <md@...ux.IT>
Cc: Harald Hoyer <harald@...hat.com>, linux-hotplug@...r.kernel.org,
netdev@...r.kernel.org, schwidefsky@...ibm.com
Subject: Re: udev can't name PS3's network devices correctly
On Mon, 2008-04-14 at 11:08 +0100, David Woodhouse wrote:
> One alternative approach would be to use dev->dev_id (is that exported
> in sysfs?). That's what IPv6 addrconf uses in addition to the MAC
> address to provide a unique address when MAC addresses are shared.
>
> We could modify the libertas and gelic (and any other affected) drivers
> to provide a dev_id, make sure it's exported in sysfs, and then use that
> in the udev rules. Would that make you happy?
That would look something like this (in fact, I think it would let us
get rid of the special case for S390 too)...
--- ./udev-120/extras/rule_generator/75-persistent-net-generator.rules~ 2008-04-03 20:12:53.000000000 +0100
+++ ./udev-120/extras/rule_generator/75-persistent-net-generator.rules 2008-04-14 11:52:46.000000000 +0100
@@ -18,7 +18,7 @@ SUBSYSTEM!="net", GOTO="persistent_net_g
NAME=="?*", GOTO="persistent_net_generator_end"
# device name whitelist
-KERNEL!="eth*|ath*|wlan*[0-9]|ra*|sta*|ctc*|lcs*|hsi*", GOTO="persistent_net_generator_end"
+KERNEL!="eth*|ath*|wlan*[0-9]|ra*|sta*|ctc*|lcs*|hsi*|msh*", GOTO="persistent_net_generator_end"
# ignore Xen virtual interfaces
SUBSYSTEMS=="xen", GOTO="persistent_net_generator_end"
@@ -29,6 +29,9 @@ ENV{MATCHADDR}="$attr{address}"
# match interface type
ENV{MATCHIFTYPE}="$attr{type}"
+# match dev_id
+ENV{MATCHDEVID}="$attr{dev_id}"
+
# do not use "locally administered" MAC address
ENV{MATCHADDR}=="?[2367abef]:*", ENV{MATCHADDR}=""
--- ./udev-120/extras/rule_generator/write_net_rules~ 2008-04-03 20:12:53.000000000 +0100
+++ ./udev-120/extras/rule_generator/write_net_rules 2008-04-14 11:47:27.000000000 +0100
@@ -15,6 +15,7 @@
# variables used to communicate:
# MATCHADDR MAC address used for the match
# MATCHID bus_id used for the match
+# MATCHDEVID dev_id used for the match
# MATCHDRV driver name used for the match
# MATCHIFTYPE interface type match
# COMMENT comment to add to the generated rule
@@ -78,6 +79,10 @@ if [ "$MATCHDRV" ]; then
match="$match, DRIVERS==\"$MATCHDRV\""
fi
+if [ "$MATCHDEVID" ]; then
+ match="$match, ATTR{dev_id}==\"$MATCHDEVID\""
+fi
+
if [ "$MATCHID" ]; then
match="$match, KERNELS==\"$MATCHID\""
fi
... and this...
--- ./linux-2.6.24.ppc/drivers/net/ps3_gelic_wireless.c~ 2008-04-13 13:38:15.000000000 +0100
+++ ./linux-2.6.24.ppc/drivers/net/ps3_gelic_wireless.c 2008-04-14 11:15:10.000000000 +0100
@@ -2699,6 +2699,7 @@ int gelic_wl_driver_probe(struct gelic_c
gelic_wl_setup_netdev_ops(netdev);
/* setup some of net_device and register it */
+ netdev->dev_id = GELIC_PORT_WIRELESS;
ret = gelic_net_setup_netdev(netdev, card);
if (ret)
goto fail_setup;
--- ./linux-2.6.24.ppc/drivers/net/ps3_gelic_net.c~ 2008-04-13 13:38:15.000000000 +0100
+++ ./linux-2.6.24.ppc/drivers/net/ps3_gelic_net.c 2008-04-14 11:15:19.000000000 +0100
@@ -1635,6 +1635,7 @@ static int ps3_gelic_driver_probe(struct
netdev->irq = card->irq;
SET_NETDEV_DEV(netdev, &card->dev->core);
gelic_ether_setup_netdev_ops(netdev, &card->napi);
+ netdev->dev_id = GELIC_PORT_ETHERNET;
result = gelic_net_setup_netdev(netdev, card);
if (result) {
dev_dbg(&dev->core, "%s: setup_netdev failed %d",
--- ./linux-2.6.24.ppc/drivers/net/wireless/libertas/main.c~ 2008-04-13 13:38:16.000000000 +0100
+++ ./linux-2.6.24.ppc/drivers/net/wireless/libertas/main.c 2008-04-14 10:49:52.000000000 +0100
@@ -1205,6 +1205,8 @@ int lbs_start_card(struct lbs_private *p
/* init 802.11d */
lbs_init_11d(priv);
+ dev->dev_id = 0;
+
if (register_netdev(dev)) {
lbs_pr_err("cannot register ethX device\n");
goto done;
@@ -1327,6 +1329,7 @@ static int lbs_add_mesh(struct lbs_priva
mesh_dev->wireless_handlers = (struct iw_handler_def *)&mesh_handler_def;
#endif
/* Register virtual mesh interface */
+ mesh_dev->dev_id = 1;
ret = register_netdev(mesh_dev);
if (ret) {
lbs_pr_err("cannot register mshX virtual interface\n");
@@ -1542,6 +1545,7 @@ static int lbs_add_rtap(struct lbs_priva
rtap_dev->set_multicast_list = lbs_set_multicast_list;
rtap_dev->priv = priv;
+ rtap_dev->dev_id = 2;
ret = register_netdev(rtap_dev);
if (ret) {
free_netdev(rtap_dev);
--- ./linux-2.6.24.ppc/net/core/net-sysfs.c~ 2008-04-13 13:38:24.000000000 +0100
+++ ./linux-2.6.24.ppc/net/core/net-sysfs.c 2008-04-14 10:58:32.000000000 +0100
@@ -87,6 +87,7 @@ static ssize_t netdev_store(struct devic
return ret;
}
+NETDEVICE_SHOW(dev_id, fmt_hex);
NETDEVICE_SHOW(addr_len, fmt_dec);
NETDEVICE_SHOW(iflink, fmt_dec);
NETDEVICE_SHOW(ifindex, fmt_dec);
@@ -210,6 +211,7 @@ static ssize_t store_tx_queue_len(struct
static struct device_attribute net_class_attributes[] = {
__ATTR(addr_len, S_IRUGO, show_addr_len, NULL),
+ __ATTR(dev_id, S_IRUGO, show_dev_id, NULL),
__ATTR(iflink, S_IRUGO, show_iflink, NULL),
__ATTR(ifindex, S_IRUGO, show_ifindex, NULL),
__ATTR(features, S_IRUGO, show_features, NULL),
--
dwmw2
--
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