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| author | Shannon Nelson <shannon.nelson@oracle.com> | 2018-08-22 16:47:14 -0700 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2018-08-28 14:33:33 -0700 |
| commit | 47b6f50077e68bcd544f657526dad4bfdce7e87d (patch) | |
| tree | f59324f964c24af7e821638b0bee4a4783310d56 /drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c | |
| parent | 7f68d43067018df9b6ce0e75a99c9d58ded989f5 (diff) | |
| download | blackbird-op-linux-47b6f50077e68bcd544f657526dad4bfdce7e87d.tar.gz blackbird-op-linux-47b6f50077e68bcd544f657526dad4bfdce7e87d.zip | |
ixgbe: disallow IPsec Tx offload when in SR-IOV mode
There seems to be a problem in the x540's internal switch wherein if SR-IOV
mode is enabled and an offloaded IPsec packet is sent to a local VF,
the packet is silently dropped. This might never be a problem as it is
somewhat a corner case, but if someone happens to be using IPsec offload
from the PF to a VF that just happens to get migrated to the local box,
communication will mysteriously fail.
Not good.
A simple way to protect from this is to simply not allow any IPsec offloads
for outgoing packets when num_vfs != 0. This doesn't help any offloads that
were created before SR-IOV was enabled, but we'll get to that later.
Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c')
| -rw-r--r-- | drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c index ecd01fade960..0a1c8bf3f74f 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c @@ -693,6 +693,9 @@ static int ixgbe_ipsec_add_sa(struct xfrm_state *xs) } else { struct tx_sa tsa; + if (adapter->num_vfs) + return -EOPNOTSUPP; + /* find the first unused index */ ret = ixgbe_ipsec_find_empty_idx(ipsec, false); if (ret < 0) { |
