Interface statistics for Bonding bug in 2.4

I recently upgraded my main server to a 2.4 kernel (2.4.1pre9). This machine uses 2 3Com 3C905B networkcards, bonded together (using the bonding module).

When doing a 'ifconfig' the bond0 device shows 0 RX packets, and a valid

# of TX packets. However looking at eth0 / eth1 (the 2 network cards)
they have the just about the same amount of RX packets, so recieving
does apear to be balanced over the two interfaces.

When running this machine on 2.2.16 the interface it does show the interface statistics accuratly. I also tested this on a clean 2.4.0 kernel, and it had the same bug.

The ifconfig output (note the 0 packets in bond0's RX)

bond0 Link encap:Ethernet HWaddr 00:50:DA:B8:33:0F
inet addr:192.168.0.1 Bcast:192.168.0.255 Mask:255.255.255.0

UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:3655 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0

eth0 Link encap:Ethernet HWaddr 00:50:DA:B8:33:0F
inet addr:192.168.0.1 Bcast:192.168.0.255 Mask:255.255.255.0

UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1 RX packets:1992 errors:0 dropped:0 overruns:0 frame:0 TX packets:1828 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100
Interrupt:11 Base address:0x9800

eth1 Link encap:Ethernet HWaddr 00:50:DA:B8:33:0F
inet addr:192.168.0.1 Bcast:192.168.0.255 Mask:255.255.255.0

UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1 RX packets:1878 errors:0 dropped:0 overruns:0 frame:0 TX packets:1827 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100
Interrupt:10 Base address:0x9400

Please CC me in any replies since im not subscribed to the kernel list.

-- Chris

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The answer is in the source; in v2.4, stats are only collected on sent packets; in v2.2, stats are not collected at all; they are simply summed from the interfaces stats.

It's not a bug; it's simply a design decision.

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Thomas Davis		| PDSF Project Leader
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(510) 486-4524		| "Only a petabyte of data this year?"
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