Messages in this thread | | | Date | Sun, 29 Jun 2003 21:36:43 +0300 | From | Dan Aloni <> | Subject | sysctl and more SIOCSIFNAME (net device rename) inconsistencies |
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The day before yesterday I found that renaming a network device under 2.5 doesn't update sysfs. While trying to figure this out I've found that there's another stuff that don't get updated with the new name: sysctl.
My system renames one of my cards to ethlan on boot. Later I manually renamed it to another name. Here are the 3 different names that the kernel see for the same network device.
ifconfig, sees the right name (ethlanX):
[root@callisto ~]# ifconfig ethlanX ethlanX Link encap:Ethernet HWaddr 00:80:AD:00:DB:BC inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0 BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:2225 errors:0 dropped:0 overruns:0 frame:0 TX packets:2984 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100 RX bytes:472674 (461.5 KiB) TX bytes:2466241 (2.3 MiB) Interrupt:5 Base address:0xb000
sysfs, sees the name of the device at module load time (eth0 or eth1):
[root@callisto ~]# ls -l /sys/class/net total 0 drwxr-xr-x 3 root root 0 Jun 29 20:41 eth0 drwxr-xr-x 3 root root 0 Jun 29 20:41 eth1 drwxr-xr-x 3 root root 0 Jun 29 20:41 lo drwxr-xr-x 3 root root 0 Jun 29 20:41 ppp0
sysctl, sees the name of the device at some point in time when the directory was instantiated by the user (ethlan):
[root@callisto ~]# ls -l /proc/sys/net/ipv4/conf total 0 dr-xr-xr-x 2 root root 0 Jun 29 21:20 all dr-xr-xr-x 2 root root 0 Jun 29 21:20 default dr-xr-xr-x 2 root root 0 Jun 29 21:20 ethinet dr-xr-xr-x 2 root root 0 Jun 29 21:20 ethlan dr-xr-xr-x 2 root root 0 Jun 29 21:20 lo dr-xr-xr-x 2 root root 0 Jun 29 21:20 ppp0
Note that this is also affects sysctl(2), as it uses /proc:
[root@callisto /home/karrde]# sysctl -a | grep ethlan.tag net.ipv4.conf.ethlan.tag = 0
I think this should be fixed before 2.6. I'm starting to figure out about sysfs, but I have no idea how to fix the sysctl part at the moment.
-- Dan Aloni da-x@gmx.net - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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