diff options
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/sfc/tc.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/tc.c b/drivers/net/ethernet/sfc/tc.c index 354c635be59f..dfe3a8bf74f0 100644 --- a/drivers/net/ethernet/sfc/tc.c +++ b/drivers/net/ethernet/sfc/tc.c @@ -1054,6 +1054,47 @@ static int efx_tc_complete_mac_mangle(struct efx_nic *efx, return 0; } +static int efx_tc_pedit_add(struct efx_nic *efx, struct efx_tc_action_set *act, + const struct flow_action_entry *fa, + struct netlink_ext_ack *extack) +{ + switch (fa->mangle.htype) { + case FLOW_ACT_MANGLE_HDR_TYPE_IP4: + switch (fa->mangle.offset) { + case offsetof(struct iphdr, ttl): + /* check that pedit applies to ttl only */ + if (fa->mangle.mask != ~EFX_TC_HDR_TYPE_TTL_MASK) + break; + + /* Adding 0xff is equivalent to decrementing the ttl. + * Other added values are not supported. + */ + if ((fa->mangle.val & EFX_TC_HDR_TYPE_TTL_MASK) != U8_MAX) + break; + + /* check that we do not decrement ttl twice */ + if (!efx_tc_flower_action_order_ok(act, + EFX_TC_AO_DEC_TTL)) { + NL_SET_ERR_MSG_MOD(extack, "Unsupported: multiple dec ttl"); + return -EOPNOTSUPP; + } + act->do_ttl_dec = 1; + return 0; + default: + break; + } + break; + default: + break; + } + + NL_SET_ERR_MSG_FMT_MOD(extack, + "Unsupported: ttl add action type %x %x %x/%x", + fa->mangle.htype, fa->mangle.offset, + fa->mangle.val, fa->mangle.mask); + return -EOPNOTSUPP; +} + /** * efx_tc_mangle() - handle a single 32-bit (or less) pedit * @efx: NIC we're installing a flow rule on @@ -2014,6 +2055,11 @@ static int efx_tc_flower_replace(struct efx_nic *efx, act->vlan_proto[act->vlan_push] = fa->vlan.proto; act->vlan_push++; break; + case FLOW_ACTION_ADD: + rc = efx_tc_pedit_add(efx, act, fa, extack); + if (rc < 0) + goto release; + break; case FLOW_ACTION_MANGLE: rc = efx_tc_mangle(efx, act, fa, &mung, extack, &match); if (rc < 0) |