diff options
| author | Rahul Lakkireddy <rahul.lakkireddy@chelsio.com> | 2016-09-20 11:43:10 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-09-22 05:40:01 (GMT) |
| commit | b20ff726fa8360a0508d2d79ecdee5a45d854e99 (patch) | |
| tree | 130ce15004d896b5b146ecbdcc5b52a072d713f0 | |
| parent | d8931847488d250e27d8f18ca6b7373e9f981d7a (diff) | |
| download | linux-b20ff726fa8360a0508d2d79ecdee5a45d854e99.tar.xz | |
cxgb4: add support for drop and redirect actions
Add support for dropping matched packets in hardware. Also add support
for re-directing matched packets to a specified port in hardware.
Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.c index d63b895..49d2deb 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.c +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.c @@ -32,6 +32,9 @@ * SOFTWARE. */ +#include <net/tc_act/tc_gact.h> +#include <net/tc_act/tc_mirred.h> + #include "cxgb4.h" #include "cxgb4_tc_u32_parse.h" #include "cxgb4_tc_u32.h" @@ -82,6 +85,67 @@ static int fill_match_fields(struct adapter *adap, return 0; } +/* Fill ch_filter_specification with parsed action. */ +static int fill_action_fields(struct adapter *adap, + struct ch_filter_specification *fs, + struct tc_cls_u32_offload *cls) +{ + unsigned int num_actions = 0; + const struct tc_action *a; + struct tcf_exts *exts; + LIST_HEAD(actions); + + exts = cls->knode.exts; + if (tc_no_actions(exts)) + return -EINVAL; + + tcf_exts_to_list(exts, &actions); + list_for_each_entry(a, &actions, list) { + /* Don't allow more than one action per rule. */ + if (num_actions) + return -EINVAL; + + /* Drop in hardware. */ + if (is_tcf_gact_shot(a)) { + fs->action = FILTER_DROP; + num_actions++; + continue; + } + + /* Re-direct to specified port in hardware. */ + if (is_tcf_mirred_redirect(a)) { + struct net_device *n_dev; + unsigned int i, index; + bool found = false; + + index = tcf_mirred_ifindex(a); + for_each_port(adap, i) { + n_dev = adap->port[i]; + if (index == n_dev->ifindex) { + fs->action = FILTER_SWITCH; + fs->eport = i; + found = true; + break; + } + } + + /* Interface doesn't belong to any port of + * the underlying hardware. + */ + if (!found) + return -EINVAL; + + num_actions++; + continue; + } + + /* Un-supported action. */ + return -EINVAL; + } + + return 0; +} + int cxgb4_config_knode(struct net_device *dev, __be16 protocol, struct tc_cls_u32_offload *cls) { @@ -234,6 +298,13 @@ int cxgb4_config_knode(struct net_device *dev, __be16 protocol, if (ret) goto out; + /* Fill ch_filter_specification action fields to be shipped to + * hardware. + */ + ret = fill_action_fields(adapter, &fs, cls); + if (ret) + goto out; + /* The filter spec has been completely built from the info * provided from u32. We now set some default fields in the * spec for sanity. |