linux/drivers/infiniband
Andrew Boyer 13eb1e21d6 IB/rxe: Avoid ICRC errors by copying into the skb first
The current process is to first calculate the CRC and then copy the client
data into the packet. This leaves a window in which the packet contents and
CRC can get out of sync, if the client changes the data after the CRC is
calculated but before the data is copied.

By copying the data into the packet and then calculating the CRC directly
from the packet contents we eliminate the window.

This can be seen with qperf's ud_bi_bw test. This seems like very
strange/reckless client behavior, but whether the client has mangled its
data or not RXE should be able to transfer it reliably.

Fixes: 8700e3e7c4 ("Soft RoCE driver")
Signed-off-by: Andrew Boyer <andrew.boyer@dell.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-28 19:12:36 -04:00
..
core Merge branch 'mellanox' into k.o/for-next 2017-08-24 20:25:15 -04:00
hw IB/qib: Convert qp_stats debugfs interface to use new iterator API 2017-08-28 19:12:30 -04:00
sw IB/rxe: Avoid ICRC errors by copying into the skb first 2017-08-28 19:12:36 -04:00
ulp Merge branch 'mellanox' into k.o/for-next 2017-08-24 20:25:15 -04:00
Kconfig IB/opa-vnic: Virtual Network Interface Controller (VNIC) netdev 2017-04-20 12:01:38 -04:00
Makefile IB/rdmavt: Create module framework and handle driver registration 2016-03-10 20:37:04 -05:00