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490 lines
15 KiB
490 lines
15 KiB
/*
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* drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c
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* Copyright (c) 2017 Mellanox Technologies. All rights reserved.
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* Copyright (c) 2017 Jiri Pirko <jiri@mellanox.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the names of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/netdevice.h>
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#include <net/flow_dissector.h>
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#include <net/pkt_cls.h>
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#include <net/tc_act/tc_gact.h>
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#include <net/tc_act/tc_mirred.h>
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#include <net/tc_act/tc_vlan.h>
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#include "spectrum.h"
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#include "core_acl_flex_keys.h"
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static int mlxsw_sp_flower_parse_actions(struct mlxsw_sp *mlxsw_sp,
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struct net_device *dev, bool ingress,
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struct mlxsw_sp_acl_rule_info *rulei,
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struct tcf_exts *exts)
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{
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const struct tc_action *a;
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LIST_HEAD(actions);
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int err;
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if (!tcf_exts_has_actions(exts))
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return 0;
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/* Count action is inserted first */
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err = mlxsw_sp_acl_rulei_act_count(mlxsw_sp, rulei);
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if (err)
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return err;
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tcf_exts_to_list(exts, &actions);
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list_for_each_entry(a, &actions, list) {
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if (is_tcf_gact_shot(a)) {
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err = mlxsw_sp_acl_rulei_act_drop(rulei);
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if (err)
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return err;
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} else if (is_tcf_gact_trap(a)) {
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err = mlxsw_sp_acl_rulei_act_trap(rulei);
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if (err)
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return err;
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} else if (is_tcf_gact_goto_chain(a)) {
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u32 chain_index = tcf_gact_goto_chain_index(a);
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struct mlxsw_sp_acl_ruleset *ruleset;
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u16 group_id;
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ruleset = mlxsw_sp_acl_ruleset_lookup(mlxsw_sp, dev,
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ingress,
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chain_index,
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MLXSW_SP_ACL_PROFILE_FLOWER);
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if (IS_ERR(ruleset))
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return PTR_ERR(ruleset);
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group_id = mlxsw_sp_acl_ruleset_group_id(ruleset);
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mlxsw_sp_acl_rulei_act_jump(rulei, group_id);
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} else if (is_tcf_mirred_egress_redirect(a)) {
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int ifindex = tcf_mirred_ifindex(a);
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struct net_device *out_dev;
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struct mlxsw_sp_fid *fid;
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u16 fid_index;
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fid = mlxsw_sp_acl_dummy_fid(mlxsw_sp);
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fid_index = mlxsw_sp_fid_index(fid);
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err = mlxsw_sp_acl_rulei_act_fid_set(mlxsw_sp, rulei,
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fid_index);
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if (err)
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return err;
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out_dev = __dev_get_by_index(dev_net(dev), ifindex);
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if (out_dev == dev)
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out_dev = NULL;
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err = mlxsw_sp_acl_rulei_act_fwd(mlxsw_sp, rulei,
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out_dev);
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if (err)
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return err;
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} else if (is_tcf_vlan(a)) {
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u16 proto = be16_to_cpu(tcf_vlan_push_proto(a));
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u32 action = tcf_vlan_action(a);
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u8 prio = tcf_vlan_push_prio(a);
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u16 vid = tcf_vlan_push_vid(a);
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err = mlxsw_sp_acl_rulei_act_vlan(mlxsw_sp, rulei,
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action, vid,
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proto, prio);
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if (err)
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return err;
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} else {
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dev_err(mlxsw_sp->bus_info->dev, "Unsupported action\n");
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return -EOPNOTSUPP;
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}
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}
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return 0;
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}
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static void mlxsw_sp_flower_parse_ipv4(struct mlxsw_sp_acl_rule_info *rulei,
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struct tc_cls_flower_offload *f)
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{
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struct flow_dissector_key_ipv4_addrs *key =
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skb_flow_dissector_target(f->dissector,
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FLOW_DISSECTOR_KEY_IPV4_ADDRS,
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f->key);
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struct flow_dissector_key_ipv4_addrs *mask =
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skb_flow_dissector_target(f->dissector,
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FLOW_DISSECTOR_KEY_IPV4_ADDRS,
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f->mask);
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mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_SRC_IP4,
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ntohl(key->src), ntohl(mask->src));
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mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_DST_IP4,
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ntohl(key->dst), ntohl(mask->dst));
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}
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static void mlxsw_sp_flower_parse_ipv6(struct mlxsw_sp_acl_rule_info *rulei,
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struct tc_cls_flower_offload *f)
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{
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struct flow_dissector_key_ipv6_addrs *key =
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skb_flow_dissector_target(f->dissector,
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FLOW_DISSECTOR_KEY_IPV6_ADDRS,
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f->key);
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struct flow_dissector_key_ipv6_addrs *mask =
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skb_flow_dissector_target(f->dissector,
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FLOW_DISSECTOR_KEY_IPV6_ADDRS,
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f->mask);
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size_t addr_half_size = sizeof(key->src) / 2;
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mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_SRC_IP6_HI,
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&key->src.s6_addr[0],
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&mask->src.s6_addr[0],
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addr_half_size);
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mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_SRC_IP6_LO,
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&key->src.s6_addr[addr_half_size],
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&mask->src.s6_addr[addr_half_size],
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addr_half_size);
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mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_DST_IP6_HI,
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&key->dst.s6_addr[0],
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&mask->dst.s6_addr[0],
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addr_half_size);
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mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_DST_IP6_LO,
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&key->dst.s6_addr[addr_half_size],
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&mask->dst.s6_addr[addr_half_size],
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addr_half_size);
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}
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static int mlxsw_sp_flower_parse_ports(struct mlxsw_sp *mlxsw_sp,
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struct mlxsw_sp_acl_rule_info *rulei,
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struct tc_cls_flower_offload *f,
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u8 ip_proto)
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{
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struct flow_dissector_key_ports *key, *mask;
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if (!dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_PORTS))
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return 0;
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if (ip_proto != IPPROTO_TCP && ip_proto != IPPROTO_UDP) {
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dev_err(mlxsw_sp->bus_info->dev, "Only UDP and TCP keys are supported\n");
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return -EINVAL;
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}
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key = skb_flow_dissector_target(f->dissector,
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FLOW_DISSECTOR_KEY_PORTS,
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f->key);
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mask = skb_flow_dissector_target(f->dissector,
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FLOW_DISSECTOR_KEY_PORTS,
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f->mask);
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mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_DST_L4_PORT,
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ntohs(key->dst), ntohs(mask->dst));
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mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_SRC_L4_PORT,
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ntohs(key->src), ntohs(mask->src));
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return 0;
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}
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static int mlxsw_sp_flower_parse_tcp(struct mlxsw_sp *mlxsw_sp,
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struct mlxsw_sp_acl_rule_info *rulei,
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struct tc_cls_flower_offload *f,
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u8 ip_proto)
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{
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struct flow_dissector_key_tcp *key, *mask;
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if (!dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_TCP))
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return 0;
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if (ip_proto != IPPROTO_TCP) {
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dev_err(mlxsw_sp->bus_info->dev, "TCP keys supported only for TCP\n");
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return -EINVAL;
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}
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key = skb_flow_dissector_target(f->dissector,
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FLOW_DISSECTOR_KEY_TCP,
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f->key);
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mask = skb_flow_dissector_target(f->dissector,
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FLOW_DISSECTOR_KEY_TCP,
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f->mask);
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mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_TCP_FLAGS,
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ntohs(key->flags), ntohs(mask->flags));
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return 0;
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}
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static int mlxsw_sp_flower_parse_ip(struct mlxsw_sp *mlxsw_sp,
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struct mlxsw_sp_acl_rule_info *rulei,
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struct tc_cls_flower_offload *f,
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u16 n_proto)
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{
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struct flow_dissector_key_ip *key, *mask;
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if (!dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_IP))
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return 0;
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if (n_proto != ETH_P_IP && n_proto != ETH_P_IPV6) {
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dev_err(mlxsw_sp->bus_info->dev, "IP keys supported only for IPv4/6\n");
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return -EINVAL;
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}
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key = skb_flow_dissector_target(f->dissector,
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FLOW_DISSECTOR_KEY_IP,
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f->key);
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mask = skb_flow_dissector_target(f->dissector,
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FLOW_DISSECTOR_KEY_IP,
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f->mask);
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mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_IP_TTL_,
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key->ttl, mask->ttl);
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mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_IP_ECN,
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key->tos & 0x3, mask->tos & 0x3);
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mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_IP_DSCP,
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key->tos >> 6, mask->tos >> 6);
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return 0;
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}
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static int mlxsw_sp_flower_parse(struct mlxsw_sp *mlxsw_sp,
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struct net_device *dev, bool ingress,
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struct mlxsw_sp_acl_rule_info *rulei,
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struct tc_cls_flower_offload *f)
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{
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u16 n_proto_mask = 0;
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u16 n_proto_key = 0;
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u16 addr_type = 0;
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u8 ip_proto = 0;
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int err;
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if (f->dissector->used_keys &
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~(BIT(FLOW_DISSECTOR_KEY_CONTROL) |
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BIT(FLOW_DISSECTOR_KEY_BASIC) |
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BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
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BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
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BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
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BIT(FLOW_DISSECTOR_KEY_PORTS) |
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BIT(FLOW_DISSECTOR_KEY_TCP) |
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BIT(FLOW_DISSECTOR_KEY_IP) |
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BIT(FLOW_DISSECTOR_KEY_VLAN))) {
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dev_err(mlxsw_sp->bus_info->dev, "Unsupported key\n");
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return -EOPNOTSUPP;
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}
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mlxsw_sp_acl_rulei_priority(rulei, f->common.prio);
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if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_CONTROL)) {
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struct flow_dissector_key_control *key =
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skb_flow_dissector_target(f->dissector,
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FLOW_DISSECTOR_KEY_CONTROL,
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f->key);
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addr_type = key->addr_type;
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}
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if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
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struct flow_dissector_key_basic *key =
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skb_flow_dissector_target(f->dissector,
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FLOW_DISSECTOR_KEY_BASIC,
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f->key);
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struct flow_dissector_key_basic *mask =
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skb_flow_dissector_target(f->dissector,
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FLOW_DISSECTOR_KEY_BASIC,
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f->mask);
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n_proto_key = ntohs(key->n_proto);
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n_proto_mask = ntohs(mask->n_proto);
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if (n_proto_key == ETH_P_ALL) {
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n_proto_key = 0;
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n_proto_mask = 0;
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}
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mlxsw_sp_acl_rulei_keymask_u32(rulei,
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MLXSW_AFK_ELEMENT_ETHERTYPE,
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n_proto_key, n_proto_mask);
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ip_proto = key->ip_proto;
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mlxsw_sp_acl_rulei_keymask_u32(rulei,
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MLXSW_AFK_ELEMENT_IP_PROTO,
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key->ip_proto, mask->ip_proto);
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}
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if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
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struct flow_dissector_key_eth_addrs *key =
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skb_flow_dissector_target(f->dissector,
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FLOW_DISSECTOR_KEY_ETH_ADDRS,
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f->key);
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struct flow_dissector_key_eth_addrs *mask =
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skb_flow_dissector_target(f->dissector,
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FLOW_DISSECTOR_KEY_ETH_ADDRS,
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f->mask);
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mlxsw_sp_acl_rulei_keymask_buf(rulei,
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MLXSW_AFK_ELEMENT_DMAC,
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key->dst, mask->dst,
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sizeof(key->dst));
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mlxsw_sp_acl_rulei_keymask_buf(rulei,
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MLXSW_AFK_ELEMENT_SMAC,
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key->src, mask->src,
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sizeof(key->src));
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}
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if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_VLAN)) {
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struct flow_dissector_key_vlan *key =
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skb_flow_dissector_target(f->dissector,
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FLOW_DISSECTOR_KEY_VLAN,
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f->key);
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struct flow_dissector_key_vlan *mask =
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skb_flow_dissector_target(f->dissector,
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FLOW_DISSECTOR_KEY_VLAN,
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f->mask);
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if (mask->vlan_id != 0)
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mlxsw_sp_acl_rulei_keymask_u32(rulei,
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MLXSW_AFK_ELEMENT_VID,
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key->vlan_id,
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mask->vlan_id);
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if (mask->vlan_priority != 0)
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mlxsw_sp_acl_rulei_keymask_u32(rulei,
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MLXSW_AFK_ELEMENT_PCP,
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key->vlan_priority,
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mask->vlan_priority);
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}
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if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS)
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mlxsw_sp_flower_parse_ipv4(rulei, f);
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if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS)
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mlxsw_sp_flower_parse_ipv6(rulei, f);
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err = mlxsw_sp_flower_parse_ports(mlxsw_sp, rulei, f, ip_proto);
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if (err)
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return err;
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err = mlxsw_sp_flower_parse_tcp(mlxsw_sp, rulei, f, ip_proto);
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if (err)
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return err;
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err = mlxsw_sp_flower_parse_ip(mlxsw_sp, rulei, f, n_proto_key & n_proto_mask);
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if (err)
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return err;
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return mlxsw_sp_flower_parse_actions(mlxsw_sp, dev, ingress,
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rulei, f->exts);
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}
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int mlxsw_sp_flower_replace(struct mlxsw_sp_port *mlxsw_sp_port, bool ingress,
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struct tc_cls_flower_offload *f)
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{
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struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
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struct net_device *dev = mlxsw_sp_port->dev;
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struct mlxsw_sp_acl_rule_info *rulei;
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struct mlxsw_sp_acl_ruleset *ruleset;
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struct mlxsw_sp_acl_rule *rule;
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int err;
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ruleset = mlxsw_sp_acl_ruleset_get(mlxsw_sp, dev, ingress,
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f->common.chain_index,
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MLXSW_SP_ACL_PROFILE_FLOWER);
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if (IS_ERR(ruleset))
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return PTR_ERR(ruleset);
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rule = mlxsw_sp_acl_rule_create(mlxsw_sp, ruleset, f->cookie);
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if (IS_ERR(rule)) {
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err = PTR_ERR(rule);
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goto err_rule_create;
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}
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rulei = mlxsw_sp_acl_rule_rulei(rule);
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err = mlxsw_sp_flower_parse(mlxsw_sp, dev, ingress, rulei, f);
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if (err)
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goto err_flower_parse;
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err = mlxsw_sp_acl_rulei_commit(rulei);
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if (err)
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goto err_rulei_commit;
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err = mlxsw_sp_acl_rule_add(mlxsw_sp, rule);
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if (err)
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goto err_rule_add;
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mlxsw_sp_acl_ruleset_put(mlxsw_sp, ruleset);
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return 0;
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err_rule_add:
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err_rulei_commit:
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err_flower_parse:
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mlxsw_sp_acl_rule_destroy(mlxsw_sp, rule);
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|
err_rule_create:
|
|
mlxsw_sp_acl_ruleset_put(mlxsw_sp, ruleset);
|
|
return err;
|
|
}
|
|
|
|
void mlxsw_sp_flower_destroy(struct mlxsw_sp_port *mlxsw_sp_port, bool ingress,
|
|
struct tc_cls_flower_offload *f)
|
|
{
|
|
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
|
|
struct mlxsw_sp_acl_ruleset *ruleset;
|
|
struct mlxsw_sp_acl_rule *rule;
|
|
|
|
ruleset = mlxsw_sp_acl_ruleset_get(mlxsw_sp, mlxsw_sp_port->dev,
|
|
ingress, f->common.chain_index,
|
|
MLXSW_SP_ACL_PROFILE_FLOWER);
|
|
if (IS_ERR(ruleset))
|
|
return;
|
|
|
|
rule = mlxsw_sp_acl_rule_lookup(mlxsw_sp, ruleset, f->cookie);
|
|
if (rule) {
|
|
mlxsw_sp_acl_rule_del(mlxsw_sp, rule);
|
|
mlxsw_sp_acl_rule_destroy(mlxsw_sp, rule);
|
|
}
|
|
|
|
mlxsw_sp_acl_ruleset_put(mlxsw_sp, ruleset);
|
|
}
|
|
|
|
int mlxsw_sp_flower_stats(struct mlxsw_sp_port *mlxsw_sp_port, bool ingress,
|
|
struct tc_cls_flower_offload *f)
|
|
{
|
|
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
|
|
struct mlxsw_sp_acl_ruleset *ruleset;
|
|
struct mlxsw_sp_acl_rule *rule;
|
|
u64 packets;
|
|
u64 lastuse;
|
|
u64 bytes;
|
|
int err;
|
|
|
|
ruleset = mlxsw_sp_acl_ruleset_get(mlxsw_sp, mlxsw_sp_port->dev,
|
|
ingress, f->common.chain_index,
|
|
MLXSW_SP_ACL_PROFILE_FLOWER);
|
|
if (WARN_ON(IS_ERR(ruleset)))
|
|
return -EINVAL;
|
|
|
|
rule = mlxsw_sp_acl_rule_lookup(mlxsw_sp, ruleset, f->cookie);
|
|
if (!rule)
|
|
return -EINVAL;
|
|
|
|
err = mlxsw_sp_acl_rule_get_stats(mlxsw_sp, rule, &packets, &bytes,
|
|
&lastuse);
|
|
if (err)
|
|
goto err_rule_get_stats;
|
|
|
|
tcf_exts_stats_update(f->exts, bytes, packets, lastuse);
|
|
|
|
mlxsw_sp_acl_ruleset_put(mlxsw_sp, ruleset);
|
|
return 0;
|
|
|
|
err_rule_get_stats:
|
|
mlxsw_sp_acl_ruleset_put(mlxsw_sp, ruleset);
|
|
return err;
|
|
}
|
|
|