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ovs/lib/netdev-offload-tc.c
wenxu 498cf3eaed netdev-offload-tc: Reject rules with unsupported ct_state flags. 
TC flower doesn't support some ct state flags such as
INVALID/SNAT/DNAT/REPLY. So it is better to reject this rule.

Fixes: 576126a931cd ("netdev-offload-tc: Add conntrack support")
Signed-off-by: wenxu <wenxu@ucloud.cn>
Reviewed-by: Marcelo Ricardo Leitner <mleitner@redhat.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
2021-02-04 20:11:12 +01:00

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/*
* Copyright (c) 2016 Mellanox Technologies, Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <config.h>
#include <errno.h>
#include <linux/if_ether.h>
#include "dpif.h"
#include "hash.h"
#include "openvswitch/hmap.h"
#include "openvswitch/match.h"
#include "openvswitch/ofpbuf.h"
#include "openvswitch/thread.h"
#include "openvswitch/types.h"
#include "openvswitch/util.h"
#include "openvswitch/vlog.h"
#include "netdev-linux.h"
#include "netdev-offload-provider.h"
#include "netdev-provider.h"
#include "netlink.h"
#include "netlink-socket.h"
#include "odp-netlink.h"
#include "odp-util.h"
#include "tc.h"
#include "unaligned.h"
#include "util.h"
#include "dpif-provider.h"
VLOG_DEFINE_THIS_MODULE(netdev_offload_tc);
static struct vlog_rate_limit error_rl = VLOG_RATE_LIMIT_INIT(60, 5);
static struct hmap ufid_to_tc = HMAP_INITIALIZER(&ufid_to_tc);
static struct hmap tc_to_ufid = HMAP_INITIALIZER(&tc_to_ufid);
static bool multi_mask_per_prio = false;
static bool block_support = false;
struct netlink_field {
int offset;
int flower_offset;
int size;
};
static bool
is_internal_port(const char *type)
{
return !strcmp(type, "internal");
}
static enum tc_qdisc_hook
get_tc_qdisc_hook(struct netdev *netdev)
{
return is_internal_port(netdev_get_type(netdev)) ? TC_EGRESS : TC_INGRESS;
}
static struct netlink_field set_flower_map[][4] = {
[OVS_KEY_ATTR_IPV4] = {
{ offsetof(struct ovs_key_ipv4, ipv4_src),
offsetof(struct tc_flower_key, ipv4.ipv4_src),
MEMBER_SIZEOF(struct tc_flower_key, ipv4.ipv4_src)
},
{ offsetof(struct ovs_key_ipv4, ipv4_dst),
offsetof(struct tc_flower_key, ipv4.ipv4_dst),
MEMBER_SIZEOF(struct tc_flower_key, ipv4.ipv4_dst)
},
{ offsetof(struct ovs_key_ipv4, ipv4_ttl),
offsetof(struct tc_flower_key, ipv4.rewrite_ttl),
MEMBER_SIZEOF(struct tc_flower_key, ipv4.rewrite_ttl)
},
{ offsetof(struct ovs_key_ipv4, ipv4_tos),
offsetof(struct tc_flower_key, ipv4.rewrite_tos),
MEMBER_SIZEOF(struct tc_flower_key, ipv4.rewrite_tos)
},
},
[OVS_KEY_ATTR_IPV6] = {
{ offsetof(struct ovs_key_ipv6, ipv6_src),
offsetof(struct tc_flower_key, ipv6.ipv6_src),
MEMBER_SIZEOF(struct tc_flower_key, ipv6.ipv6_src)
},
{ offsetof(struct ovs_key_ipv6, ipv6_dst),
offsetof(struct tc_flower_key, ipv6.ipv6_dst),
MEMBER_SIZEOF(struct tc_flower_key, ipv6.ipv6_dst)
},
{ offsetof(struct ovs_key_ipv6, ipv6_hlimit),
offsetof(struct tc_flower_key, ipv6.rewrite_hlimit),
MEMBER_SIZEOF(struct tc_flower_key, ipv6.rewrite_hlimit)
},
{ offsetof(struct ovs_key_ipv6, ipv6_tclass),
offsetof(struct tc_flower_key, ipv6.rewrite_tclass),
MEMBER_SIZEOF(struct tc_flower_key, ipv6.rewrite_tclass)
},
},
[OVS_KEY_ATTR_ETHERNET] = {
{ offsetof(struct ovs_key_ethernet, eth_src),
offsetof(struct tc_flower_key, src_mac),
MEMBER_SIZEOF(struct tc_flower_key, src_mac)
},
{ offsetof(struct ovs_key_ethernet, eth_dst),
offsetof(struct tc_flower_key, dst_mac),
MEMBER_SIZEOF(struct tc_flower_key, dst_mac)
},
},
[OVS_KEY_ATTR_ETHERTYPE] = {
{ 0,
offsetof(struct tc_flower_key, eth_type),
MEMBER_SIZEOF(struct tc_flower_key, eth_type)
},
},
[OVS_KEY_ATTR_TCP] = {
{ offsetof(struct ovs_key_tcp, tcp_src),
offsetof(struct tc_flower_key, tcp_src),
MEMBER_SIZEOF(struct tc_flower_key, tcp_src)
},
{ offsetof(struct ovs_key_tcp, tcp_dst),
offsetof(struct tc_flower_key, tcp_dst),
MEMBER_SIZEOF(struct tc_flower_key, tcp_dst)
},
},
[OVS_KEY_ATTR_UDP] = {
{ offsetof(struct ovs_key_udp, udp_src),
offsetof(struct tc_flower_key, udp_src),
MEMBER_SIZEOF(struct tc_flower_key, udp_src)
},
{ offsetof(struct ovs_key_udp, udp_dst),
offsetof(struct tc_flower_key, udp_dst),
MEMBER_SIZEOF(struct tc_flower_key, udp_dst)
},
},
};
static struct ovs_mutex ufid_lock = OVS_MUTEX_INITIALIZER;
/**
* struct ufid_tc_data - data entry for ufid-tc hashmaps.
* @ufid_to_tc_node: Element in @ufid_to_tc hash table by ufid key.
* @tc_to_ufid_node: Element in @tc_to_ufid hash table by tcf_id key.
* @ufid: ufid assigned to the flow
* @id: tc filter id (tcf_id)
* @netdev: netdev associated with the tc rule
*/
struct ufid_tc_data {
struct hmap_node ufid_to_tc_node;
struct hmap_node tc_to_ufid_node;
ovs_u128 ufid;
struct tcf_id id;
struct netdev *netdev;
};
static void
del_ufid_tc_mapping_unlocked(const ovs_u128 *ufid)
{
size_t ufid_hash = hash_bytes(ufid, sizeof *ufid, 0);
struct ufid_tc_data *data;
HMAP_FOR_EACH_WITH_HASH (data, ufid_to_tc_node, ufid_hash, &ufid_to_tc) {
if (ovs_u128_equals(*ufid, data->ufid)) {
break;
}
}
if (!data) {
return;
}
hmap_remove(&ufid_to_tc, &data->ufid_to_tc_node);
hmap_remove(&tc_to_ufid, &data->tc_to_ufid_node);
netdev_close(data->netdev);
free(data);
}
/* Remove matching ufid entry from ufid-tc hashmaps. */
static void
del_ufid_tc_mapping(const ovs_u128 *ufid)
{
ovs_mutex_lock(&ufid_lock);
del_ufid_tc_mapping_unlocked(ufid);
ovs_mutex_unlock(&ufid_lock);
}
/* Wrapper function to delete filter and ufid tc mapping */
static int
del_filter_and_ufid_mapping(struct tcf_id *id, const ovs_u128 *ufid)
{
int err;
err = tc_del_filter(id);
if (!err) {
del_ufid_tc_mapping(ufid);
}
return err;
}
/* Add ufid entry to ufid_to_tc hashmap. */
static void
add_ufid_tc_mapping(struct netdev *netdev, const ovs_u128 *ufid,
struct tcf_id *id)
{
struct ufid_tc_data *new_data = xzalloc(sizeof *new_data);
size_t ufid_hash = hash_bytes(ufid, sizeof *ufid, 0);
size_t tc_hash;
tc_hash = hash_int(hash_int(id->prio, id->handle), id->ifindex);
tc_hash = hash_int(id->chain, tc_hash);
new_data->ufid = *ufid;
new_data->id = *id;
new_data->netdev = netdev_ref(netdev);
ovs_mutex_lock(&ufid_lock);
hmap_insert(&ufid_to_tc, &new_data->ufid_to_tc_node, ufid_hash);
hmap_insert(&tc_to_ufid, &new_data->tc_to_ufid_node, tc_hash);
ovs_mutex_unlock(&ufid_lock);
}
/* Get tc id from ufid_to_tc hashmap.
*
* Returns 0 if successful and fills id.
* Otherwise returns the error.
*/
static int
get_ufid_tc_mapping(const ovs_u128 *ufid, struct tcf_id *id)
{
size_t ufid_hash = hash_bytes(ufid, sizeof *ufid, 0);
struct ufid_tc_data *data;
ovs_mutex_lock(&ufid_lock);
HMAP_FOR_EACH_WITH_HASH (data, ufid_to_tc_node, ufid_hash, &ufid_to_tc) {
if (ovs_u128_equals(*ufid, data->ufid)) {
*id = data->id;
ovs_mutex_unlock(&ufid_lock);
return 0;
}
}
ovs_mutex_unlock(&ufid_lock);
return ENOENT;
}
/* Find ufid entry in ufid_to_tc hashmap using tcf_id id.
* The result is saved in ufid.
*
* Returns true on success.
*/
static bool
find_ufid(struct netdev *netdev, struct tcf_id *id, ovs_u128 *ufid)
{
struct ufid_tc_data *data;
size_t tc_hash;
tc_hash = hash_int(hash_int(id->prio, id->handle), id->ifindex);
tc_hash = hash_int(id->chain, tc_hash);
ovs_mutex_lock(&ufid_lock);
HMAP_FOR_EACH_WITH_HASH (data, tc_to_ufid_node, tc_hash, &tc_to_ufid) {
if (netdev == data->netdev && is_tcf_id_eq(&data->id, id)) {
*ufid = data->ufid;
break;
}
}
ovs_mutex_unlock(&ufid_lock);
return (data != NULL);
}
struct prio_map_data {
struct hmap_node node;
struct tc_flower_key mask;
ovs_be16 protocol;
uint16_t prio;
};
/* Get free prio for tc flower
* If prio is already allocated for mask/eth_type combination then return it.
* If not assign new prio.
*
* Return prio on success or 0 if we are out of prios.
*/
static uint16_t
get_prio_for_tc_flower(struct tc_flower *flower)
{
static struct hmap prios = HMAP_INITIALIZER(&prios);
static struct ovs_mutex prios_lock = OVS_MUTEX_INITIALIZER;
static uint16_t last_prio = TC_RESERVED_PRIORITY_MAX;
size_t key_len = sizeof(struct tc_flower_key);
size_t hash = hash_int((OVS_FORCE uint32_t) flower->key.eth_type, 0);
struct prio_map_data *data;
struct prio_map_data *new_data;
if (!multi_mask_per_prio) {
hash = hash_bytes(&flower->mask, key_len, hash);
}
/* We can use the same prio for same mask/eth combination but must have
* different prio if not. Flower classifier will reject same prio for
* different mask combination unless multi mask per prio is supported. */
ovs_mutex_lock(&prios_lock);
HMAP_FOR_EACH_WITH_HASH (data, node, hash, &prios) {
if ((multi_mask_per_prio
|| !memcmp(&flower->mask, &data->mask, key_len))
&& data->protocol == flower->key.eth_type) {
ovs_mutex_unlock(&prios_lock);
return data->prio;
}
}
if (last_prio == UINT16_MAX) {
/* last_prio can overflow if there will be many different kinds of
* flows which shouldn't happen organically. */
ovs_mutex_unlock(&prios_lock);
return 0;
}
new_data = xzalloc(sizeof *new_data);
memcpy(&new_data->mask, &flower->mask, key_len);
new_data->prio = ++last_prio;
new_data->protocol = flower->key.eth_type;
hmap_insert(&prios, &new_data->node, hash);
ovs_mutex_unlock(&prios_lock);
return new_data->prio;
}
static uint32_t
get_block_id_from_netdev(struct netdev *netdev)
{
if (block_support) {
return netdev_get_block_id(netdev);
}
return 0;
}
static int
netdev_tc_flow_flush(struct netdev *netdev)
{
struct ufid_tc_data *data, *next;
int err;
ovs_mutex_lock(&ufid_lock);
HMAP_FOR_EACH_SAFE (data, next, tc_to_ufid_node, &tc_to_ufid) {
if (data->netdev != netdev) {
continue;
}
err = tc_del_filter(&data->id);
if (!err) {
del_ufid_tc_mapping_unlocked(&data->ufid);
}
}
ovs_mutex_unlock(&ufid_lock);
return 0;
}
static int
netdev_tc_flow_dump_create(struct netdev *netdev,
struct netdev_flow_dump **dump_out,
bool terse)
{
enum tc_qdisc_hook hook = get_tc_qdisc_hook(netdev);
struct netdev_flow_dump *dump;
uint32_t block_id = 0;
struct tcf_id id;
int prio = 0;
int ifindex;
ifindex = netdev_get_ifindex(netdev);
if (ifindex < 0) {
VLOG_ERR_RL(&error_rl, "dump_create: failed to get ifindex for %s: %s",
netdev_get_name(netdev), ovs_strerror(-ifindex));
return -ifindex;
}
block_id = get_block_id_from_netdev(netdev);
dump = xzalloc(sizeof *dump);
dump->nl_dump = xzalloc(sizeof *dump->nl_dump);
dump->netdev = netdev_ref(netdev);
dump->terse = terse;
id = tc_make_tcf_id(ifindex, block_id, prio, hook);
tc_dump_flower_start(&id, dump->nl_dump, terse);
*dump_out = dump;
return 0;
}
static int
netdev_tc_flow_dump_destroy(struct netdev_flow_dump *dump)
{
nl_dump_done(dump->nl_dump);
netdev_close(dump->netdev);
free(dump->nl_dump);
free(dump);
return 0;
}
static void
parse_flower_rewrite_to_netlink_action(struct ofpbuf *buf,
struct tc_flower *flower)
{
char *mask = (char *) &flower->rewrite.mask;
char *data = (char *) &flower->rewrite.key;
for (int type = 0; type < ARRAY_SIZE(set_flower_map); type++) {
char *put = NULL;
size_t nested = 0;
int len = ovs_flow_key_attr_lens[type].len;
if (len <= 0) {
continue;
}
for (int j = 0; j < ARRAY_SIZE(set_flower_map[type]); j++) {
struct netlink_field *f = &set_flower_map[type][j];
if (!f->size) {
break;
}
if (!is_all_zeros(mask + f->flower_offset, f->size)) {
if (!put) {
nested = nl_msg_start_nested(buf,
OVS_ACTION_ATTR_SET_MASKED);
put = nl_msg_put_unspec_zero(buf, type, len * 2);
}
memcpy(put + f->offset, data + f->flower_offset, f->size);
memcpy(put + len + f->offset,
mask + f->flower_offset, f->size);
}
}
if (put) {
nl_msg_end_nested(buf, nested);
}
}
}
static void parse_tc_flower_geneve_opts(struct tc_action *action,
struct ofpbuf *buf)
{
int tun_opt_len = action->encap.data.present.len;
size_t geneve_off;
int idx = 0;
if (!tun_opt_len) {
return;
}
geneve_off = nl_msg_start_nested(buf, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS);
while (tun_opt_len) {
struct geneve_opt *opt;
opt = &action->encap.data.opts.gnv[idx];
nl_msg_put(buf, opt, sizeof(struct geneve_opt) + opt->length * 4);
idx += sizeof(struct geneve_opt) / 4 + opt->length;
tun_opt_len -= sizeof(struct geneve_opt) + opt->length * 4;
}
nl_msg_end_nested(buf, geneve_off);
}
static void
flower_tun_opt_to_match(struct match *match, struct tc_flower *flower)
{
struct geneve_opt *opt, *opt_mask;
int len, cnt = 0;
memcpy(match->flow.tunnel.metadata.opts.gnv,
flower->key.tunnel.metadata.opts.gnv,
flower->key.tunnel.metadata.present.len);
match->flow.tunnel.metadata.present.len =
flower->key.tunnel.metadata.present.len;
match->flow.tunnel.flags |= FLOW_TNL_F_UDPIF;
memcpy(match->wc.masks.tunnel.metadata.opts.gnv,
flower->mask.tunnel.metadata.opts.gnv,
flower->mask.tunnel.metadata.present.len);
len = flower->key.tunnel.metadata.present.len;
while (len) {
opt = &match->flow.tunnel.metadata.opts.gnv[cnt];
opt_mask = &match->wc.masks.tunnel.metadata.opts.gnv[cnt];
opt_mask->length = 0x1f;
cnt += sizeof(struct geneve_opt) / 4 + opt->length;
len -= sizeof(struct geneve_opt) + opt->length * 4;
}
match->wc.masks.tunnel.metadata.present.len =
flower->mask.tunnel.metadata.present.len;
match->wc.masks.tunnel.flags |= FLOW_TNL_F_UDPIF;
}
static void
parse_tc_flower_to_stats(struct tc_flower *flower,
struct dpif_flow_stats *stats)
{
if (!stats) {
return;
}
memset(stats, 0, sizeof *stats);
stats->n_packets = get_32aligned_u64(&flower->stats.n_packets);
stats->n_bytes = get_32aligned_u64(&flower->stats.n_bytes);
stats->used = flower->lastused;
}
static void
parse_tc_flower_to_attrs(struct tc_flower *flower,
struct dpif_flow_attrs *attrs)
{
attrs->offloaded = (flower->offloaded_state == TC_OFFLOADED_STATE_IN_HW ||
flower->offloaded_state ==
TC_OFFLOADED_STATE_UNDEFINED);
attrs->dp_layer = "tc";
attrs->dp_extra_info = NULL;
}
static int
parse_tc_flower_terse_to_match(struct tc_flower *flower,
struct match *match,
struct dpif_flow_stats *stats,
struct dpif_flow_attrs *attrs)
{
match_init_catchall(match);
parse_tc_flower_to_stats(flower, stats);
parse_tc_flower_to_attrs(flower, attrs);
return 0;
}
static int
parse_tc_flower_to_match(struct tc_flower *flower,
struct match *match,
struct nlattr **actions,
struct dpif_flow_stats *stats,
struct dpif_flow_attrs *attrs,
struct ofpbuf *buf,
bool terse)
{
size_t act_off;
struct tc_flower_key *key = &flower->key;
struct tc_flower_key *mask = &flower->mask;
odp_port_t outport = 0;
struct tc_action *action;
int i;
if (terse) {
return parse_tc_flower_terse_to_match(flower, match, stats, attrs);
}
ofpbuf_clear(buf);
match_init_catchall(match);
match_set_dl_src_masked(match, key->src_mac, mask->src_mac);
match_set_dl_dst_masked(match, key->dst_mac, mask->dst_mac);
if (eth_type_vlan(key->eth_type)) {
match->flow.vlans[0].tpid = key->eth_type;
match->wc.masks.vlans[0].tpid = OVS_BE16_MAX;
match_set_dl_vlan(match, htons(key->vlan_id[0]), 0);
match_set_dl_vlan_pcp(match, key->vlan_prio[0], 0);
if (eth_type_vlan(key->encap_eth_type[0])) {
match_set_dl_vlan(match, htons(key->vlan_id[1]), 1);
match_set_dl_vlan_pcp(match, key->vlan_prio[1], 1);
match_set_dl_type(match, key->encap_eth_type[1]);
match->flow.vlans[1].tpid = key->encap_eth_type[0];
match->wc.masks.vlans[1].tpid = OVS_BE16_MAX;
} else {
match_set_dl_type(match, key->encap_eth_type[0]);
}
flow_fix_vlan_tpid(&match->flow);
} else if (eth_type_mpls(key->eth_type)) {
match->flow.mpls_lse[0] = key->mpls_lse & mask->mpls_lse;
match->wc.masks.mpls_lse[0] = mask->mpls_lse;
match_set_dl_type(match, key->encap_eth_type[0]);
} else if (key->eth_type == htons(ETH_TYPE_ARP)) {
match_set_arp_sha_masked(match, key->arp.sha, mask->arp.sha);
match_set_arp_tha_masked(match, key->arp.tha, mask->arp.tha);
match_set_arp_spa_masked(match, key->arp.spa, mask->arp.spa);
match_set_arp_tpa_masked(match, key->arp.tpa, mask->arp.tpa);
match_set_arp_opcode_masked(match, key->arp.opcode,
mask->arp.opcode);
match_set_dl_type(match, key->eth_type);
} else {
match_set_dl_type(match, key->eth_type);
}
if (is_ip_any(&match->flow)) {
if (key->ip_proto) {
match_set_nw_proto(match, key->ip_proto);
}
match_set_nw_tos_masked(match, key->ip_tos, mask->ip_tos);
match_set_nw_ttl_masked(match, key->ip_ttl, mask->ip_ttl);
if (mask->flags) {
uint8_t flags = 0;
uint8_t flags_mask = 0;
if (mask->flags & TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT) {
if (key->flags & TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT) {
flags |= FLOW_NW_FRAG_ANY;
}
flags_mask |= FLOW_NW_FRAG_ANY;
}
if (mask->flags & TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST) {
if (!(key->flags & TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST)) {
flags |= FLOW_NW_FRAG_LATER;
}
flags_mask |= FLOW_NW_FRAG_LATER;
}
match_set_nw_frag_masked(match, flags, flags_mask);
}
match_set_nw_src_masked(match, key->ipv4.ipv4_src, mask->ipv4.ipv4_src);
match_set_nw_dst_masked(match, key->ipv4.ipv4_dst, mask->ipv4.ipv4_dst);
match_set_ipv6_src_masked(match,
&key->ipv6.ipv6_src, &mask->ipv6.ipv6_src);
match_set_ipv6_dst_masked(match,
&key->ipv6.ipv6_dst, &mask->ipv6.ipv6_dst);
if (key->ip_proto == IPPROTO_TCP) {
match_set_tp_dst_masked(match, key->tcp_dst, mask->tcp_dst);
match_set_tp_src_masked(match, key->tcp_src, mask->tcp_src);
match_set_tcp_flags_masked(match, key->tcp_flags, mask->tcp_flags);
} else if (key->ip_proto == IPPROTO_UDP) {
match_set_tp_dst_masked(match, key->udp_dst, mask->udp_dst);
match_set_tp_src_masked(match, key->udp_src, mask->udp_src);
} else if (key->ip_proto == IPPROTO_SCTP) {
match_set_tp_dst_masked(match, key->sctp_dst, mask->sctp_dst);
match_set_tp_src_masked(match, key->sctp_src, mask->sctp_src);
} else if (key->ip_proto == IPPROTO_ICMP ||
key->ip_proto == IPPROTO_ICMPV6) {
match_set_tp_dst_masked(match, htons(key->icmp_code),
htons(mask->icmp_code));
match_set_tp_src_masked(match, htons(key->icmp_type),
htons(mask->icmp_type));
}
if (mask->ct_state) {
uint8_t ct_statev = 0, ct_statem = 0;
if (mask->ct_state & TCA_FLOWER_KEY_CT_FLAGS_NEW) {
if (key->ct_state & TCA_FLOWER_KEY_CT_FLAGS_NEW) {
ct_statev |= OVS_CS_F_NEW;
}
ct_statem |= OVS_CS_F_NEW;
}
if (mask->ct_state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED) {
if (key->ct_state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED) {
ct_statev |= OVS_CS_F_ESTABLISHED;
}
ct_statem |= OVS_CS_F_ESTABLISHED;
}
if (mask->ct_state & TCA_FLOWER_KEY_CT_FLAGS_TRACKED) {
if (key->ct_state & TCA_FLOWER_KEY_CT_FLAGS_TRACKED) {
ct_statev |= OVS_CS_F_TRACKED;
}
ct_statem |= OVS_CS_F_TRACKED;
}
match_set_ct_state_masked(match, ct_statev, ct_statem);
}
match_set_ct_zone_masked(match, key->ct_zone, mask->ct_zone);
match_set_ct_mark_masked(match, key->ct_mark, mask->ct_mark);
match_set_ct_label_masked(match, key->ct_label, mask->ct_label);
}
if (flower->tunnel) {
if (flower->mask.tunnel.id) {
match_set_tun_id(match, flower->key.tunnel.id);
match->flow.tunnel.flags |= FLOW_TNL_F_KEY;
}
if (flower->mask.tunnel.ipv4.ipv4_dst ||
flower->mask.tunnel.ipv4.ipv4_src) {
match_set_tun_dst_masked(match,
flower->key.tunnel.ipv4.ipv4_dst,
flower->mask.tunnel.ipv4.ipv4_dst);
match_set_tun_src_masked(match,
flower->key.tunnel.ipv4.ipv4_src,
flower->mask.tunnel.ipv4.ipv4_src);
} else if (ipv6_addr_is_set(&flower->mask.tunnel.ipv6.ipv6_dst) ||
ipv6_addr_is_set(&flower->mask.tunnel.ipv6.ipv6_src)) {
match_set_tun_ipv6_dst_masked(match,
&flower->key.tunnel.ipv6.ipv6_dst,
&flower->mask.tunnel.ipv6.ipv6_dst);
match_set_tun_ipv6_src_masked(match,
&flower->key.tunnel.ipv6.ipv6_src,
&flower->mask.tunnel.ipv6.ipv6_src);
}
if (flower->key.tunnel.tos) {
match_set_tun_tos_masked(match, flower->key.tunnel.tos,
flower->mask.tunnel.tos);
}
if (flower->key.tunnel.ttl) {
match_set_tun_ttl_masked(match, flower->key.tunnel.ttl,
flower->mask.tunnel.ttl);
}
if (flower->key.tunnel.tp_dst) {
match_set_tun_tp_dst(match, flower->key.tunnel.tp_dst);
}
if (flower->key.tunnel.metadata.present.len) {
flower_tun_opt_to_match(match, flower);
}
}
act_off = nl_msg_start_nested(buf, OVS_FLOW_ATTR_ACTIONS);
{
action = flower->actions;
for (i = 0; i < flower->action_count; i++, action++) {
switch (action->type) {
case TC_ACT_VLAN_POP: {
nl_msg_put_flag(buf, OVS_ACTION_ATTR_POP_VLAN);
}
break;
case TC_ACT_VLAN_PUSH: {
struct ovs_action_push_vlan *push;
push = nl_msg_put_unspec_zero(buf, OVS_ACTION_ATTR_PUSH_VLAN,
sizeof *push);
push->vlan_tpid = action->vlan.vlan_push_tpid;
push->vlan_tci = htons(action->vlan.vlan_push_id
| (action->vlan.vlan_push_prio << 13)
| VLAN_CFI);
}
break;
case TC_ACT_MPLS_POP: {
nl_msg_put_be16(buf, OVS_ACTION_ATTR_POP_MPLS,
action->mpls.proto);
}
break;
case TC_ACT_MPLS_PUSH: {
struct ovs_action_push_mpls *push;
ovs_be32 mpls_lse = 0;
flow_set_mpls_lse_label(&mpls_lse, action->mpls.label);
flow_set_mpls_lse_tc(&mpls_lse, action->mpls.tc);
flow_set_mpls_lse_ttl(&mpls_lse, action->mpls.ttl);
flow_set_mpls_lse_bos(&mpls_lse, action->mpls.bos);
push = nl_msg_put_unspec_zero(buf, OVS_ACTION_ATTR_PUSH_MPLS,
sizeof *push);
push->mpls_ethertype = action->mpls.proto;
push->mpls_lse = mpls_lse;
}
break;
case TC_ACT_MPLS_SET: {
size_t set_offset = nl_msg_start_nested(buf,
OVS_ACTION_ATTR_SET);
struct ovs_key_mpls *set_mpls;
ovs_be32 mpls_lse = 0;
flow_set_mpls_lse_label(&mpls_lse, action->mpls.label);
flow_set_mpls_lse_tc(&mpls_lse, action->mpls.tc);
flow_set_mpls_lse_ttl(&mpls_lse, action->mpls.ttl);
flow_set_mpls_lse_bos(&mpls_lse, action->mpls.bos);
set_mpls = nl_msg_put_unspec_zero(buf, OVS_KEY_ATTR_MPLS,
sizeof *set_mpls);
set_mpls->mpls_lse = mpls_lse;
nl_msg_end_nested(buf, set_offset);
}
break;
case TC_ACT_PEDIT: {
parse_flower_rewrite_to_netlink_action(buf, flower);
}
break;
case TC_ACT_ENCAP: {
size_t set_offset = nl_msg_start_nested(buf, OVS_ACTION_ATTR_SET);
size_t tunnel_offset =
nl_msg_start_nested(buf, OVS_KEY_ATTR_TUNNEL);
if (action->encap.id_present) {
nl_msg_put_be64(buf, OVS_TUNNEL_KEY_ATTR_ID, action->encap.id);
}
if (action->encap.ipv4.ipv4_src) {
nl_msg_put_be32(buf, OVS_TUNNEL_KEY_ATTR_IPV4_SRC,
action->encap.ipv4.ipv4_src);
}
if (action->encap.ipv4.ipv4_dst) {
nl_msg_put_be32(buf, OVS_TUNNEL_KEY_ATTR_IPV4_DST,
action->encap.ipv4.ipv4_dst);
}
if (ipv6_addr_is_set(&action->encap.ipv6.ipv6_src)) {
nl_msg_put_in6_addr(buf, OVS_TUNNEL_KEY_ATTR_IPV6_SRC,
&action->encap.ipv6.ipv6_src);
}
if (ipv6_addr_is_set(&action->encap.ipv6.ipv6_dst)) {
nl_msg_put_in6_addr(buf, OVS_TUNNEL_KEY_ATTR_IPV6_DST,
&action->encap.ipv6.ipv6_dst);
}
if (action->encap.tos) {
nl_msg_put_u8(buf, OVS_TUNNEL_KEY_ATTR_TOS,
action->encap.tos);
}
if (action->encap.ttl) {
nl_msg_put_u8(buf, OVS_TUNNEL_KEY_ATTR_TTL,
action->encap.ttl);
}
if (action->encap.tp_dst) {
nl_msg_put_be16(buf, OVS_TUNNEL_KEY_ATTR_TP_DST,
action->encap.tp_dst);
}
if (!action->encap.no_csum) {
nl_msg_put_u8(buf, OVS_TUNNEL_KEY_ATTR_CSUM,
!action->encap.no_csum);
}
parse_tc_flower_geneve_opts(action, buf);
nl_msg_end_nested(buf, tunnel_offset);
nl_msg_end_nested(buf, set_offset);
}
break;
case TC_ACT_OUTPUT: {
if (action->out.ifindex_out) {
outport =
netdev_ifindex_to_odp_port(action->out.ifindex_out);
if (!outport) {
return ENOENT;
}
}
nl_msg_put_u32(buf, OVS_ACTION_ATTR_OUTPUT, odp_to_u32(outport));
}
break;
case TC_ACT_CT: {
size_t ct_offset;
if (action->ct.clear) {
nl_msg_put_flag(buf, OVS_ACTION_ATTR_CT_CLEAR);
break;
}
ct_offset = nl_msg_start_nested(buf, OVS_ACTION_ATTR_CT);
if (action->ct.commit) {
nl_msg_put_flag(buf, OVS_CT_ATTR_COMMIT);
}
if (action->ct.zone) {
nl_msg_put_u16(buf, OVS_CT_ATTR_ZONE, action->ct.zone);
}
if (action->ct.mark_mask) {
uint32_t mark_and_mask[2] = { action->ct.mark,
action->ct.mark_mask };
nl_msg_put_unspec(buf, OVS_CT_ATTR_MARK, &mark_and_mask,
sizeof mark_and_mask);
}
if (!ovs_u128_is_zero(action->ct.label_mask)) {
struct {
ovs_u128 key;
ovs_u128 mask;
} *ct_label;
ct_label = nl_msg_put_unspec_uninit(buf,
OVS_CT_ATTR_LABELS,
sizeof *ct_label);
ct_label->key = action->ct.label;
ct_label->mask = action->ct.label_mask;
}
if (action->ct.nat_type) {
size_t nat_offset = nl_msg_start_nested(buf,
OVS_CT_ATTR_NAT);
if (action->ct.nat_type == TC_NAT_SRC) {
nl_msg_put_flag(buf, OVS_NAT_ATTR_SRC);
} else if (action->ct.nat_type == TC_NAT_DST) {
nl_msg_put_flag(buf, OVS_NAT_ATTR_DST);
}
if (action->ct.range.ip_family == AF_INET) {
nl_msg_put_be32(buf, OVS_NAT_ATTR_IP_MIN,
action->ct.range.ipv4.min);
nl_msg_put_be32(buf, OVS_NAT_ATTR_IP_MAX,
action->ct.range.ipv4.max);
} else if (action->ct.range.ip_family == AF_INET6) {
nl_msg_put_in6_addr(buf, OVS_NAT_ATTR_IP_MIN,
&action->ct.range.ipv6.min);
nl_msg_put_in6_addr(buf, OVS_NAT_ATTR_IP_MAX,
&action->ct.range.ipv6.max);
}
if (action->ct.range.port.min) {
nl_msg_put_u16(buf, OVS_NAT_ATTR_PROTO_MIN,
ntohs(action->ct.range.port.min));
if (action->ct.range.port.max) {
nl_msg_put_u16(buf, OVS_NAT_ATTR_PROTO_MAX,
ntohs(action->ct.range.port.max));
}
}
nl_msg_end_nested(buf, nat_offset);
}
nl_msg_end_nested(buf, ct_offset);
}
break;
case TC_ACT_GOTO: {
nl_msg_put_u32(buf, OVS_ACTION_ATTR_RECIRC, action->chain);
}
break;
}
}
}
nl_msg_end_nested(buf, act_off);
*actions = ofpbuf_at_assert(buf, act_off, sizeof(struct nlattr));
parse_tc_flower_to_stats(flower, stats);
parse_tc_flower_to_attrs(flower, attrs);
return 0;
}
static bool
netdev_tc_flow_dump_next(struct netdev_flow_dump *dump,
struct match *match,
struct nlattr **actions,
struct dpif_flow_stats *stats,
struct dpif_flow_attrs *attrs,
ovs_u128 *ufid,
struct ofpbuf *rbuffer,
struct ofpbuf *wbuffer)
{
struct netdev *netdev = dump->netdev;
struct ofpbuf nl_flow;
struct tcf_id id;
id = tc_make_tcf_id(netdev_get_ifindex(netdev),
get_block_id_from_netdev(netdev),
0, /* prio */
get_tc_qdisc_hook(netdev));
while (nl_dump_next(dump->nl_dump, &nl_flow, rbuffer)) {
struct tc_flower flower;
if (parse_netlink_to_tc_flower(&nl_flow, &id, &flower, dump->terse)) {
continue;
}
if (parse_tc_flower_to_match(&flower, match, actions, stats, attrs,
wbuffer, dump->terse)) {
continue;
}
if (flower.act_cookie.len) {
*ufid = *((ovs_u128 *) flower.act_cookie.data);
} else if (!find_ufid(netdev, &id, ufid)) {
continue;
}
match->wc.masks.in_port.odp_port = u32_to_odp(UINT32_MAX);
match->flow.in_port.odp_port = dump->port;
match_set_recirc_id(match, id.chain);
return true;
}
return false;
}
static int
parse_mpls_set_action(struct tc_flower *flower, struct tc_action *action,
const struct nlattr *set)
{
const struct ovs_key_mpls *mpls_set = nl_attr_get(set);
action->mpls.label = mpls_lse_to_label(mpls_set->mpls_lse);
action->mpls.tc = mpls_lse_to_tc(mpls_set->mpls_lse);
action->mpls.ttl = mpls_lse_to_ttl(mpls_set->mpls_lse);
action->mpls.bos = mpls_lse_to_bos(mpls_set->mpls_lse);
action->type = TC_ACT_MPLS_SET;
flower->action_count++;
return 0;
}
static int
parse_put_flow_nat_action(struct tc_action *action,
const struct nlattr *nat,
size_t nat_len)
{
const struct nlattr *nat_attr;
size_t nat_left;
action->ct.nat_type = TC_NAT_RESTORE;
NL_ATTR_FOR_EACH_UNSAFE (nat_attr, nat_left, nat, nat_len) {
switch (nl_attr_type(nat_attr)) {
case OVS_NAT_ATTR_SRC: {
action->ct.nat_type = TC_NAT_SRC;
};
break;
case OVS_NAT_ATTR_DST: {
action->ct.nat_type = TC_NAT_DST;
};
break;
case OVS_NAT_ATTR_IP_MIN: {
if (nl_attr_get_size(nat_attr) == sizeof(ovs_be32)) {
ovs_be32 addr = nl_attr_get_be32(nat_attr);
action->ct.range.ipv4.min = addr;
action->ct.range.ip_family = AF_INET;
} else {
struct in6_addr addr = nl_attr_get_in6_addr(nat_attr);
action->ct.range.ipv6.min = addr;
action->ct.range.ip_family = AF_INET6;
}
};
break;
case OVS_NAT_ATTR_IP_MAX: {
if (nl_attr_get_size(nat_attr) == sizeof(ovs_be32)) {
ovs_be32 addr = nl_attr_get_be32(nat_attr);
action->ct.range.ipv4.max = addr;
action->ct.range.ip_family = AF_INET;
} else {
struct in6_addr addr = nl_attr_get_in6_addr(nat_attr);
action->ct.range.ipv6.max = addr;
action->ct.range.ip_family = AF_INET6;
}
};
break;
case OVS_NAT_ATTR_PROTO_MIN: {
action->ct.range.port.min = htons(nl_attr_get_u16(nat_attr));
};
break;
case OVS_NAT_ATTR_PROTO_MAX: {
action->ct.range.port.max = htons(nl_attr_get_u16(nat_attr));
};
break;
}
}
return 0;
}
static int
parse_put_flow_ct_action(struct tc_flower *flower,
struct tc_action *action,
const struct nlattr *ct,
size_t ct_len)
{
const struct nlattr *ct_attr;
size_t ct_left;
int err;
NL_ATTR_FOR_EACH_UNSAFE (ct_attr, ct_left, ct, ct_len) {
switch (nl_attr_type(ct_attr)) {
case OVS_CT_ATTR_COMMIT: {
action->ct.commit = true;
}
break;
case OVS_CT_ATTR_ZONE: {
action->ct.zone = nl_attr_get_u16(ct_attr);
}
break;
case OVS_CT_ATTR_NAT: {
const struct nlattr *nat = nl_attr_get(ct_attr);
const size_t nat_len = nl_attr_get_size(ct_attr);
err = parse_put_flow_nat_action(action, nat, nat_len);
if (err) {
return err;
}
}
break;
case OVS_CT_ATTR_MARK: {
const struct {
uint32_t key;
uint32_t mask;
} *ct_mark;
ct_mark = nl_attr_get_unspec(ct_attr, sizeof *ct_mark);
action->ct.mark = ct_mark->key;
action->ct.mark_mask = ct_mark->mask;
}
break;
case OVS_CT_ATTR_LABELS: {
const struct {
ovs_u128 key;
ovs_u128 mask;
} *ct_label;
ct_label = nl_attr_get_unspec(ct_attr, sizeof *ct_label);
action->ct.label = ct_label->key;
action->ct.label_mask = ct_label->mask;
}
break;
}
}
action->type = TC_ACT_CT;
flower->action_count++;
return 0;
}
static int
parse_put_flow_set_masked_action(struct tc_flower *flower,
struct tc_action *action,
const struct nlattr *set,
size_t set_len,
bool hasmask)
{
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
uint64_t set_stub[1024 / 8];
struct ofpbuf set_buf = OFPBUF_STUB_INITIALIZER(set_stub);
char *set_data, *set_mask;
char *key = (char *) &flower->rewrite.key;
char *mask = (char *) &flower->rewrite.mask;
const struct nlattr *attr;
int i, j, type;
size_t size;
/* copy so we can set attr mask to 0 for used ovs key struct members */
attr = ofpbuf_put(&set_buf, set, set_len);
type = nl_attr_type(attr);
size = nl_attr_get_size(attr) / 2;
set_data = CONST_CAST(char *, nl_attr_get(attr));
set_mask = set_data + size;
if (type >= ARRAY_SIZE(set_flower_map)
|| !set_flower_map[type][0].size) {
VLOG_DBG_RL(&rl, "unsupported set action type: %d", type);
ofpbuf_uninit(&set_buf);
return EOPNOTSUPP;
}
for (i = 0; i < ARRAY_SIZE(set_flower_map[type]); i++) {
struct netlink_field *f = &set_flower_map[type][i];
if (!f->size) {
break;
}
/* copy masked value */
for (j = 0; j < f->size; j++) {
char maskval = hasmask ? set_mask[f->offset + j] : 0xFF;
key[f->flower_offset + j] = maskval & set_data[f->offset + j];
mask[f->flower_offset + j] = maskval;
}
/* set its mask to 0 to show it's been used. */
if (hasmask) {
memset(set_mask + f->offset, 0, f->size);
}
}
if (!is_all_zeros(&flower->rewrite, sizeof flower->rewrite)) {
if (flower->rewrite.rewrite == false) {
flower->rewrite.rewrite = true;
action->type = TC_ACT_PEDIT;
flower->action_count++;
}
}
if (hasmask && !is_all_zeros(set_mask, size)) {
VLOG_DBG_RL(&rl, "unsupported sub attribute of set action type %d",
type);
ofpbuf_uninit(&set_buf);
return EOPNOTSUPP;
}
ofpbuf_uninit(&set_buf);
return 0;
}
static int
parse_put_flow_set_action(struct tc_flower *flower, struct tc_action *action,
const struct nlattr *set, size_t set_len)
{
const struct nlattr *tunnel;
const struct nlattr *tun_attr;
size_t tun_left, tunnel_len;
if (nl_attr_type(set) == OVS_KEY_ATTR_MPLS) {
return parse_mpls_set_action(flower, action, set);
}
if (nl_attr_type(set) != OVS_KEY_ATTR_TUNNEL) {
return parse_put_flow_set_masked_action(flower, action, set,
set_len, false);
}
tunnel = nl_attr_get(set);
tunnel_len = nl_attr_get_size(set);
action->type = TC_ACT_ENCAP;
action->encap.id_present = false;
flower->action_count++;
NL_ATTR_FOR_EACH_UNSAFE(tun_attr, tun_left, tunnel, tunnel_len) {
switch (nl_attr_type(tun_attr)) {
case OVS_TUNNEL_KEY_ATTR_ID: {
action->encap.id = nl_attr_get_be64(tun_attr);
action->encap.id_present = true;
}
break;
case OVS_TUNNEL_KEY_ATTR_IPV4_SRC: {
action->encap.ipv4.ipv4_src = nl_attr_get_be32(tun_attr);
}
break;
case OVS_TUNNEL_KEY_ATTR_IPV4_DST: {
action->encap.ipv4.ipv4_dst = nl_attr_get_be32(tun_attr);
}
break;
case OVS_TUNNEL_KEY_ATTR_TOS: {
action->encap.tos = nl_attr_get_u8(tun_attr);
}
break;
case OVS_TUNNEL_KEY_ATTR_TTL: {
action->encap.ttl = nl_attr_get_u8(tun_attr);
}
break;
case OVS_TUNNEL_KEY_ATTR_IPV6_SRC: {
action->encap.ipv6.ipv6_src =
nl_attr_get_in6_addr(tun_attr);
}
break;
case OVS_TUNNEL_KEY_ATTR_IPV6_DST: {
action->encap.ipv6.ipv6_dst =
nl_attr_get_in6_addr(tun_attr);
}
break;
case OVS_TUNNEL_KEY_ATTR_TP_SRC: {
action->encap.tp_src = nl_attr_get_be16(tun_attr);
}
break;
case OVS_TUNNEL_KEY_ATTR_TP_DST: {
action->encap.tp_dst = nl_attr_get_be16(tun_attr);
}
break;
case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS: {
memcpy(action->encap.data.opts.gnv, nl_attr_get(tun_attr),
nl_attr_get_size(tun_attr));
action->encap.data.present.len = nl_attr_get_size(tun_attr);
}
break;
}
}
return 0;
}
static int
test_key_and_mask(struct match *match)
{
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
const struct flow *key = &match->flow;
struct flow *mask = &match->wc.masks;
if (mask->pkt_mark) {
VLOG_DBG_RL(&rl, "offloading attribute pkt_mark isn't supported");
return EOPNOTSUPP;
}
if (mask->dp_hash) {
VLOG_DBG_RL(&rl, "offloading attribute dp_hash isn't supported");
return EOPNOTSUPP;
}
if (mask->conj_id) {
VLOG_DBG_RL(&rl, "offloading attribute conj_id isn't supported");
return EOPNOTSUPP;
}
if (mask->skb_priority) {
VLOG_DBG_RL(&rl, "offloading attribute skb_priority isn't supported");
return EOPNOTSUPP;
}
if (mask->actset_output) {
VLOG_DBG_RL(&rl,
"offloading attribute actset_output isn't supported");
return EOPNOTSUPP;
}
if (mask->packet_type && key->packet_type) {
VLOG_DBG_RL(&rl, "offloading attribute packet_type isn't supported");
return EOPNOTSUPP;
}
mask->packet_type = 0;
for (int i = 0; i < FLOW_N_REGS; i++) {
if (mask->regs[i]) {
VLOG_DBG_RL(&rl,
"offloading attribute regs[%d] isn't supported", i);
return EOPNOTSUPP;
}
}
if (mask->metadata) {
VLOG_DBG_RL(&rl, "offloading attribute metadata isn't supported");
return EOPNOTSUPP;
}
if (mask->nw_tos) {
VLOG_DBG_RL(&rl, "offloading attribute nw_tos isn't supported");
return EOPNOTSUPP;
}
for (int i = 1; i < FLOW_MAX_MPLS_LABELS; i++) {
if (mask->mpls_lse[i]) {
VLOG_DBG_RL(&rl, "offloading multiple mpls_lses isn't supported");
return EOPNOTSUPP;
}
}
if (key->dl_type == htons(ETH_TYPE_IP) &&
key->nw_proto == IPPROTO_IGMP) {
if (mask->tp_src) {
VLOG_DBG_RL(&rl,
"offloading attribute igmp_type isn't supported");
return EOPNOTSUPP;
}
if (mask->tp_dst) {
VLOG_DBG_RL(&rl,
"offloading attribute igmp_code isn't supported");
return EOPNOTSUPP;
}
} else if (key->dl_type == htons(OFP_DL_TYPE_NOT_ETH_TYPE)) {
VLOG_DBG_RL(&rl,
"offloading of non-ethernet packets isn't supported");
return EOPNOTSUPP;
}
if (!is_all_zeros(mask, sizeof *mask)) {
VLOG_DBG_RL(&rl, "offloading isn't supported, unknown attribute");
return EOPNOTSUPP;
}
return 0;
}
static void
flower_match_to_tun_opt(struct tc_flower *flower, const struct flow_tnl *tnl,
const struct flow_tnl *tnl_mask)
{
struct geneve_opt *opt, *opt_mask;
int len, cnt = 0;
memcpy(flower->key.tunnel.metadata.opts.gnv, tnl->metadata.opts.gnv,
tnl->metadata.present.len);
flower->key.tunnel.metadata.present.len = tnl->metadata.present.len;
memcpy(flower->mask.tunnel.metadata.opts.gnv, tnl_mask->metadata.opts.gnv,
tnl->metadata.present.len);
len = flower->key.tunnel.metadata.present.len;
while (len) {
opt = &flower->key.tunnel.metadata.opts.gnv[cnt];
opt_mask = &flower->mask.tunnel.metadata.opts.gnv[cnt];
opt_mask->length = opt->length;
cnt += sizeof(struct geneve_opt) / 4 + opt->length;
len -= sizeof(struct geneve_opt) + opt->length * 4;
}
flower->mask.tunnel.metadata.present.len = tnl->metadata.present.len;
}
static int
netdev_tc_flow_put(struct netdev *netdev, struct match *match,
struct nlattr *actions, size_t actions_len,
const ovs_u128 *ufid, struct offload_info *info,
struct dpif_flow_stats *stats)
{
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
enum tc_qdisc_hook hook = get_tc_qdisc_hook(netdev);
struct tc_flower flower;
const struct flow *key = &match->flow;
struct flow *mask = &match->wc.masks;
const struct flow_tnl *tnl = &match->flow.tunnel;
const struct flow_tnl *tnl_mask = &mask->tunnel;
struct tc_action *action;
bool recirc_act = false;
uint32_t block_id = 0;
struct nlattr *nla;
struct tcf_id id;
uint32_t chain;
size_t left;
int prio = 0;
int ifindex;
int err;
ifindex = netdev_get_ifindex(netdev);
if (ifindex < 0) {
VLOG_ERR_RL(&error_rl, "flow_put: failed to get ifindex for %s: %s",
netdev_get_name(netdev), ovs_strerror(-ifindex));
return -ifindex;
}
memset(&flower, 0, sizeof flower);
chain = key->recirc_id;
mask->recirc_id = 0;
if (flow_tnl_dst_is_set(&key->tunnel) ||
flow_tnl_src_is_set(&key->tunnel)) {
VLOG_DBG_RL(&rl,
"tunnel: id %#" PRIx64 " src " IP_FMT
" dst " IP_FMT " tp_src %d tp_dst %d",
ntohll(tnl->tun_id),
IP_ARGS(tnl->ip_src), IP_ARGS(tnl->ip_dst),
ntohs(tnl->tp_src), ntohs(tnl->tp_dst));
flower.key.tunnel.id = tnl->tun_id;
flower.key.tunnel.ipv4.ipv4_src = tnl->ip_src;
flower.key.tunnel.ipv4.ipv4_dst = tnl->ip_dst;
flower.key.tunnel.ipv6.ipv6_src = tnl->ipv6_src;
flower.key.tunnel.ipv6.ipv6_dst = tnl->ipv6_dst;
flower.key.tunnel.tos = tnl->ip_tos;
flower.key.tunnel.ttl = tnl->ip_ttl;
flower.key.tunnel.tp_src = tnl->tp_src;
flower.key.tunnel.tp_dst = tnl->tp_dst;
flower.mask.tunnel.ipv4.ipv4_src = tnl_mask->ip_src;
flower.mask.tunnel.ipv4.ipv4_dst = tnl_mask->ip_dst;
flower.mask.tunnel.ipv6.ipv6_src = tnl_mask->ipv6_src;
flower.mask.tunnel.ipv6.ipv6_dst = tnl_mask->ipv6_dst;
flower.mask.tunnel.tos = tnl_mask->ip_tos;
flower.mask.tunnel.ttl = tnl_mask->ip_ttl;
flower.mask.tunnel.id = (tnl->flags & FLOW_TNL_F_KEY) ? tnl_mask->tun_id : 0;
flower_match_to_tun_opt(&flower, tnl, tnl_mask);
flower.tunnel = true;
}
memset(&mask->tunnel, 0, sizeof mask->tunnel);
flower.key.eth_type = key->dl_type;
flower.mask.eth_type = mask->dl_type;
if (mask->mpls_lse[0]) {
flower.key.mpls_lse = key->mpls_lse[0];
flower.mask.mpls_lse = mask->mpls_lse[0];
flower.key.encap_eth_type[0] = flower.key.eth_type;
}
mask->mpls_lse[0] = 0;
if (mask->vlans[0].tpid && eth_type_vlan(key->vlans[0].tpid)) {
flower.key.encap_eth_type[0] = flower.key.eth_type;
flower.mask.encap_eth_type[0] = flower.mask.eth_type;
flower.key.eth_type = key->vlans[0].tpid;
flower.mask.eth_type = mask->vlans[0].tpid;
}
if (mask->vlans[0].tci) {
ovs_be16 vid_mask = mask->vlans[0].tci & htons(VLAN_VID_MASK);
ovs_be16 pcp_mask = mask->vlans[0].tci & htons(VLAN_PCP_MASK);
ovs_be16 cfi = mask->vlans[0].tci & htons(VLAN_CFI);
if (cfi && key->vlans[0].tci & htons(VLAN_CFI)
&& (!vid_mask || vid_mask == htons(VLAN_VID_MASK))
&& (!pcp_mask || pcp_mask == htons(VLAN_PCP_MASK))
&& (vid_mask || pcp_mask)) {
if (vid_mask) {
flower.key.vlan_id[0] = vlan_tci_to_vid(key->vlans[0].tci);
flower.mask.vlan_id[0] = vlan_tci_to_vid(mask->vlans[0].tci);
VLOG_DBG_RL(&rl, "vlan_id[0]: %d\n", flower.key.vlan_id[0]);
}
if (pcp_mask) {
flower.key.vlan_prio[0] = vlan_tci_to_pcp(key->vlans[0].tci);
flower.mask.vlan_prio[0] = vlan_tci_to_pcp(mask->vlans[0].tci);
VLOG_DBG_RL(&rl, "vlan_prio[0]: %d\n",
flower.key.vlan_prio[0]);
}
} else if (mask->vlans[0].tci == htons(0xffff) &&
ntohs(key->vlans[0].tci) == 0) {
/* exact && no vlan */
} else {
/* partial mask */
return EOPNOTSUPP;
}
}
if (mask->vlans[1].tpid && eth_type_vlan(key->vlans[1].tpid)) {
flower.key.encap_eth_type[1] = flower.key.encap_eth_type[0];
flower.mask.encap_eth_type[1] = flower.mask.encap_eth_type[0];
flower.key.encap_eth_type[0] = key->vlans[1].tpid;
flower.mask.encap_eth_type[0] = mask->vlans[1].tpid;
}
if (mask->vlans[1].tci) {
ovs_be16 vid_mask = mask->vlans[1].tci & htons(VLAN_VID_MASK);
ovs_be16 pcp_mask = mask->vlans[1].tci & htons(VLAN_PCP_MASK);
ovs_be16 cfi = mask->vlans[1].tci & htons(VLAN_CFI);
if (cfi && key->vlans[1].tci & htons(VLAN_CFI)
&& (!vid_mask || vid_mask == htons(VLAN_VID_MASK))
&& (!pcp_mask || pcp_mask == htons(VLAN_PCP_MASK))
&& (vid_mask || pcp_mask)) {
if (vid_mask) {
flower.key.vlan_id[1] = vlan_tci_to_vid(key->vlans[1].tci);
flower.mask.vlan_id[1] = vlan_tci_to_vid(mask->vlans[1].tci);
VLOG_DBG_RL(&rl, "vlan_id[1]: %d", flower.key.vlan_id[1]);
}
if (pcp_mask) {
flower.key.vlan_prio[1] = vlan_tci_to_pcp(key->vlans[1].tci);
flower.mask.vlan_prio[1] = vlan_tci_to_pcp(mask->vlans[1].tci);
VLOG_DBG_RL(&rl, "vlan_prio[1]: %d", flower.key.vlan_prio[1]);
}
} else if (mask->vlans[1].tci == htons(0xffff) &&
ntohs(key->vlans[1].tci) == 0) {
/* exact && no vlan */
} else {
/* partial mask */
return EOPNOTSUPP;
}
}
memset(mask->vlans, 0, sizeof mask->vlans);
flower.key.dst_mac = key->dl_dst;
flower.mask.dst_mac = mask->dl_dst;
flower.key.src_mac = key->dl_src;
flower.mask.src_mac = mask->dl_src;
memset(&mask->dl_dst, 0, sizeof mask->dl_dst);
memset(&mask->dl_src, 0, sizeof mask->dl_src);
mask->dl_type = 0;
mask->in_port.odp_port = 0;
if (key->dl_type == htons(ETH_P_ARP)) {
flower.key.arp.spa = key->nw_src;
flower.key.arp.tpa = key->nw_dst;
flower.key.arp.sha = key->arp_sha;
flower.key.arp.tha = key->arp_tha;
flower.key.arp.opcode = key->nw_proto;
flower.mask.arp.spa = mask->nw_src;
flower.mask.arp.tpa = mask->nw_dst;
flower.mask.arp.sha = mask->arp_sha;
flower.mask.arp.tha = mask->arp_tha;
flower.mask.arp.opcode = mask->nw_proto;
mask->nw_src = 0;
mask->nw_dst = 0;
mask->nw_proto = 0;
memset(&mask->arp_sha, 0, sizeof mask->arp_sha);
memset(&mask->arp_tha, 0, sizeof mask->arp_tha);
}
if (is_ip_any(key)) {
flower.key.ip_proto = key->nw_proto;
flower.mask.ip_proto = mask->nw_proto;
mask->nw_proto = 0;
flower.key.ip_tos = key->nw_tos;
flower.mask.ip_tos = mask->nw_tos;
mask->nw_tos = 0;
flower.key.ip_ttl = key->nw_ttl;
flower.mask.ip_ttl = mask->nw_ttl;
mask->nw_ttl = 0;
if (mask->nw_frag & FLOW_NW_FRAG_ANY) {
flower.mask.flags |= TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT;
if (key->nw_frag & FLOW_NW_FRAG_ANY) {
flower.key.flags |= TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT;
if (mask->nw_frag & FLOW_NW_FRAG_LATER) {
flower.mask.flags |= TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST;
if (!(key->nw_frag & FLOW_NW_FRAG_LATER)) {
flower.key.flags |= TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST;
}
}
}
mask->nw_frag = 0;
}
if (key->nw_proto == IPPROTO_TCP) {
flower.key.tcp_dst = key->tp_dst;
flower.mask.tcp_dst = mask->tp_dst;
flower.key.tcp_src = key->tp_src;
flower.mask.tcp_src = mask->tp_src;
flower.key.tcp_flags = key->tcp_flags;
flower.mask.tcp_flags = mask->tcp_flags;
mask->tp_src = 0;
mask->tp_dst = 0;
mask->tcp_flags = 0;
} else if (key->nw_proto == IPPROTO_UDP) {
flower.key.udp_dst = key->tp_dst;
flower.mask.udp_dst = mask->tp_dst;
flower.key.udp_src = key->tp_src;
flower.mask.udp_src = mask->tp_src;
mask->tp_src = 0;
mask->tp_dst = 0;
} else if (key->nw_proto == IPPROTO_SCTP) {
flower.key.sctp_dst = key->tp_dst;
flower.mask.sctp_dst = mask->tp_dst;
flower.key.sctp_src = key->tp_src;
flower.mask.sctp_src = mask->tp_src;
mask->tp_src = 0;
mask->tp_dst = 0;
} else if (key->nw_proto == IPPROTO_ICMP ||
key->nw_proto == IPPROTO_ICMPV6) {
flower.key.icmp_code = (uint8_t) ntohs(key->tp_dst);
flower.mask.icmp_code = (uint8_t) ntohs (mask->tp_dst);
flower.key.icmp_type = (uint8_t) ntohs(key->tp_src);
flower.mask.icmp_type = (uint8_t) ntohs(mask->tp_src);
mask->tp_src = 0;
mask->tp_dst = 0;
}
if (key->dl_type == htons(ETH_P_IP)) {
flower.key.ipv4.ipv4_src = key->nw_src;
flower.mask.ipv4.ipv4_src = mask->nw_src;
flower.key.ipv4.ipv4_dst = key->nw_dst;
flower.mask.ipv4.ipv4_dst = mask->nw_dst;
mask->nw_src = 0;
mask->nw_dst = 0;
} else if (key->dl_type == htons(ETH_P_IPV6)) {
flower.key.ipv6.ipv6_src = key->ipv6_src;
flower.mask.ipv6.ipv6_src = mask->ipv6_src;
flower.key.ipv6.ipv6_dst = key->ipv6_dst;
flower.mask.ipv6.ipv6_dst = mask->ipv6_dst;
memset(&mask->ipv6_src, 0, sizeof mask->ipv6_src);
memset(&mask->ipv6_dst, 0, sizeof mask->ipv6_dst);
}
}
if (mask->ct_state) {
if (mask->ct_state & OVS_CS_F_NEW) {
if (key->ct_state & OVS_CS_F_NEW) {
flower.key.ct_state |= TCA_FLOWER_KEY_CT_FLAGS_NEW;
}
flower.mask.ct_state |= TCA_FLOWER_KEY_CT_FLAGS_NEW;
mask->ct_state &= ~OVS_CS_F_NEW;
}
if (mask->ct_state & OVS_CS_F_ESTABLISHED) {
if (key->ct_state & OVS_CS_F_ESTABLISHED) {
flower.key.ct_state |= TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED;
}
flower.mask.ct_state |= TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED;
mask->ct_state &= ~OVS_CS_F_ESTABLISHED;
}
if (mask->ct_state & OVS_CS_F_TRACKED) {
if (key->ct_state & OVS_CS_F_TRACKED) {
flower.key.ct_state |= TCA_FLOWER_KEY_CT_FLAGS_TRACKED;
}
flower.mask.ct_state |= TCA_FLOWER_KEY_CT_FLAGS_TRACKED;
mask->ct_state &= ~OVS_CS_F_TRACKED;
}
if (flower.key.ct_state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED) {
flower.key.ct_state &= ~(TCA_FLOWER_KEY_CT_FLAGS_NEW);
flower.mask.ct_state &= ~(TCA_FLOWER_KEY_CT_FLAGS_NEW);
}
}
if (mask->ct_zone) {
flower.key.ct_zone = key->ct_zone;
flower.mask.ct_zone = mask->ct_zone;
mask->ct_zone = 0;
}
if (mask->ct_mark) {
flower.key.ct_mark = key->ct_mark;
flower.mask.ct_mark = mask->ct_mark;
mask->ct_mark = 0;
}
if (!ovs_u128_is_zero(mask->ct_label)) {
flower.key.ct_label = key->ct_label;
flower.mask.ct_label = mask->ct_label;
mask->ct_label = OVS_U128_ZERO;
}
/* ignore exact match on skb_mark of 0. */
if (mask->pkt_mark == UINT32_MAX && !key->pkt_mark) {
mask->pkt_mark = 0;
}
err = test_key_and_mask(match);
if (err) {
return err;
}
NL_ATTR_FOR_EACH(nla, left, actions, actions_len) {
if (flower.action_count >= TCA_ACT_MAX_NUM) {
VLOG_DBG_RL(&rl, "Can only support %d actions", TCA_ACT_MAX_NUM);
return EOPNOTSUPP;
}
action = &flower.actions[flower.action_count];
if (nl_attr_type(nla) == OVS_ACTION_ATTR_OUTPUT) {
odp_port_t port = nl_attr_get_odp_port(nla);
struct netdev *outdev = netdev_ports_get(
port, netdev_get_dpif_type(netdev));
if (!outdev) {
VLOG_DBG_RL(&rl, "Can't find netdev for output port %d", port);
return ENODEV;
}
action->out.ifindex_out = netdev_get_ifindex(outdev);
action->out.ingress = is_internal_port(netdev_get_type(outdev));
action->type = TC_ACT_OUTPUT;
flower.action_count++;
netdev_close(outdev);
} else if (nl_attr_type(nla) == OVS_ACTION_ATTR_PUSH_VLAN) {
const struct ovs_action_push_vlan *vlan_push = nl_attr_get(nla);
action->vlan.vlan_push_tpid = vlan_push->vlan_tpid;
action->vlan.vlan_push_id = vlan_tci_to_vid(vlan_push->vlan_tci);
action->vlan.vlan_push_prio = vlan_tci_to_pcp(vlan_push->vlan_tci);
action->type = TC_ACT_VLAN_PUSH;
flower.action_count++;
} else if (nl_attr_type(nla) == OVS_ACTION_ATTR_POP_VLAN) {
action->type = TC_ACT_VLAN_POP;
flower.action_count++;
} else if (nl_attr_type(nla) == OVS_ACTION_ATTR_PUSH_MPLS) {
const struct ovs_action_push_mpls *mpls_push = nl_attr_get(nla);
action->mpls.proto = mpls_push->mpls_ethertype;
action->mpls.label = mpls_lse_to_label(mpls_push->mpls_lse);
action->mpls.tc = mpls_lse_to_tc(mpls_push->mpls_lse);
action->mpls.ttl = mpls_lse_to_ttl(mpls_push->mpls_lse);
action->mpls.bos = mpls_lse_to_bos(mpls_push->mpls_lse);
action->type = TC_ACT_MPLS_PUSH;
flower.action_count++;
} else if (nl_attr_type(nla) == OVS_ACTION_ATTR_POP_MPLS) {
action->mpls.proto = nl_attr_get_be16(nla);
action->type = TC_ACT_MPLS_POP;
flower.action_count++;
} else if (nl_attr_type(nla) == OVS_ACTION_ATTR_SET) {
const struct nlattr *set = nl_attr_get(nla);
const size_t set_len = nl_attr_get_size(nla);
err = parse_put_flow_set_action(&flower, action, set, set_len);
if (err) {
return err;
}
if (action->type == TC_ACT_ENCAP) {
action->encap.tp_dst = info->tp_dst_port;
action->encap.no_csum = !info->tunnel_csum_on;
}
} else if (nl_attr_type(nla) == OVS_ACTION_ATTR_SET_MASKED) {
const struct nlattr *set = nl_attr_get(nla);
const size_t set_len = nl_attr_get_size(nla);
err = parse_put_flow_set_masked_action(&flower, action, set,
set_len, true);
if (err) {
return err;
}
} else if (nl_attr_type(nla) == OVS_ACTION_ATTR_CT) {
const struct nlattr *ct = nl_attr_get(nla);
const size_t ct_len = nl_attr_get_size(nla);
err = parse_put_flow_ct_action(&flower, action, ct, ct_len);
if (err) {
return err;
}
} else if (nl_attr_type(nla) == OVS_ACTION_ATTR_CT_CLEAR) {
action->type = TC_ACT_CT;
action->ct.clear = true;
flower.action_count++;
} else if (nl_attr_type(nla) == OVS_ACTION_ATTR_RECIRC) {
action->type = TC_ACT_GOTO;
action->chain = nl_attr_get_u32(nla);
flower.action_count++;
recirc_act = true;
} else if (nl_attr_type(nla) == OVS_ACTION_ATTR_DROP) {
action->type = TC_ACT_GOTO;
action->chain = 0; /* 0 is reserved and not used by recirc. */
flower.action_count++;
} else {
VLOG_DBG_RL(&rl, "unsupported put action type: %d",
nl_attr_type(nla));
return EOPNOTSUPP;
}
}
if ((chain || recirc_act) && !info->recirc_id_shared_with_tc) {
VLOG_ERR_RL(&error_rl, "flow_put: recirc_id sharing not supported");
return EOPNOTSUPP;
}
if (get_ufid_tc_mapping(ufid, &id) == 0) {
VLOG_DBG_RL(&rl, "updating old handle: %d prio: %d",
id.handle, id.prio);
info->tc_modify_flow_deleted = !del_filter_and_ufid_mapping(&id, ufid);
}
prio = get_prio_for_tc_flower(&flower);
if (prio == 0) {
VLOG_ERR_RL(&rl, "couldn't get tc prio: %s", ovs_strerror(ENOSPC));
return ENOSPC;
}
flower.act_cookie.data = ufid;
flower.act_cookie.len = sizeof *ufid;
block_id = get_block_id_from_netdev(netdev);
id = tc_make_tcf_id_chain(ifindex, block_id, chain, prio, hook);
err = tc_replace_flower(&id, &flower);
if (!err) {
if (stats) {
memset(stats, 0, sizeof *stats);
}
add_ufid_tc_mapping(netdev, ufid, &id);
}
return err;
}
static int
netdev_tc_flow_get(struct netdev *netdev,
struct match *match,
struct nlattr **actions,
const ovs_u128 *ufid,
struct dpif_flow_stats *stats,
struct dpif_flow_attrs *attrs,
struct ofpbuf *buf)
{
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
struct tc_flower flower;
odp_port_t in_port;
struct tcf_id id;
int err;
err = get_ufid_tc_mapping(ufid, &id);
if (err) {
return err;
}
VLOG_DBG_RL(&rl, "flow get (dev %s prio %d handle %d block_id %d)",
netdev_get_name(netdev), id.prio, id.handle, id.block_id);
err = tc_get_flower(&id, &flower);
if (err) {
VLOG_ERR_RL(&error_rl, "flow get failed (dev %s prio %d handle %d): %s",
netdev_get_name(netdev), id.prio, id.handle,
ovs_strerror(err));
return err;
}
in_port = netdev_ifindex_to_odp_port(id.ifindex);
parse_tc_flower_to_match(&flower, match, actions, stats, attrs, buf, false);
match->wc.masks.in_port.odp_port = u32_to_odp(UINT32_MAX);
match->flow.in_port.odp_port = in_port;
match_set_recirc_id(match, id.chain);
return 0;
}
static int
netdev_tc_flow_del(struct netdev *netdev OVS_UNUSED,
const ovs_u128 *ufid,
struct dpif_flow_stats *stats)
{
struct tc_flower flower;
struct tcf_id id;
int error;
error = get_ufid_tc_mapping(ufid, &id);
if (error) {
return error;
}
if (stats) {
memset(stats, 0, sizeof *stats);
if (!tc_get_flower(&id, &flower)) {
stats->n_packets = get_32aligned_u64(&flower.stats.n_packets);
stats->n_bytes = get_32aligned_u64(&flower.stats.n_bytes);
stats->used = flower.lastused;
}
}
error = del_filter_and_ufid_mapping(&id, ufid);
return error;
}
static int
netdev_tc_get_n_flows(struct netdev *netdev, uint64_t *n_flows)
{
struct ufid_tc_data *data;
uint64_t total = 0;
ovs_mutex_lock(&ufid_lock);
HMAP_FOR_EACH (data, tc_to_ufid_node, &tc_to_ufid) {
if (data->netdev == netdev) {
total++;
}
}
ovs_mutex_unlock(&ufid_lock);
*n_flows = total;
return 0;
}
static void
probe_multi_mask_per_prio(int ifindex)
{
struct tc_flower flower;
struct tcf_id id1, id2;
int block_id = 0;
int prio = 1;
int error;
error = tc_add_del_qdisc(ifindex, true, block_id, TC_INGRESS);
if (error) {
return;
}
memset(&flower, 0, sizeof flower);
flower.tc_policy = TC_POLICY_SKIP_HW;
flower.key.eth_type = htons(ETH_P_IP);
flower.mask.eth_type = OVS_BE16_MAX;
memset(&flower.key.dst_mac, 0x11, sizeof flower.key.dst_mac);
memset(&flower.mask.dst_mac, 0xff, sizeof flower.mask.dst_mac);
id1 = tc_make_tcf_id(ifindex, block_id, prio, TC_INGRESS);
error = tc_replace_flower(&id1, &flower);
if (error) {
goto out;
}
memset(&flower.key.src_mac, 0x11, sizeof flower.key.src_mac);
memset(&flower.mask.src_mac, 0xff, sizeof flower.mask.src_mac);
id2 = tc_make_tcf_id(ifindex, block_id, prio, TC_INGRESS);
error = tc_replace_flower(&id2, &flower);
tc_del_filter(&id1);
if (error) {
goto out;
}
tc_del_filter(&id2);
multi_mask_per_prio = true;
VLOG_INFO("probe tc: multiple masks on single tc prio is supported.");
out:
tc_add_del_qdisc(ifindex, false, block_id, TC_INGRESS);
}
static void
probe_tc_block_support(int ifindex)
{
struct tc_flower flower;
uint32_t block_id = 1;
struct tcf_id id;
int prio = 0;
int error;
error = tc_add_del_qdisc(ifindex, true, block_id, TC_INGRESS);
if (error) {
return;
}
memset(&flower, 0, sizeof flower);
flower.tc_policy = TC_POLICY_SKIP_HW;
flower.key.eth_type = htons(ETH_P_IP);
flower.mask.eth_type = OVS_BE16_MAX;
memset(&flower.key.dst_mac, 0x11, sizeof flower.key.dst_mac);
memset(&flower.mask.dst_mac, 0xff, sizeof flower.mask.dst_mac);
id = tc_make_tcf_id(ifindex, block_id, prio, TC_INGRESS);
error = tc_replace_flower(&id, &flower);
tc_add_del_qdisc(ifindex, false, block_id, TC_INGRESS);
if (!error) {
block_support = true;
VLOG_INFO("probe tc: block offload is supported.");
}
}
static int
netdev_tc_init_flow_api(struct netdev *netdev)
{
static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
enum tc_qdisc_hook hook = get_tc_qdisc_hook(netdev);
uint32_t block_id = 0;
struct tcf_id id;
int ifindex;
int error;
ifindex = netdev_get_ifindex(netdev);
if (ifindex < 0) {
VLOG_INFO("init: failed to get ifindex for %s: %s",
netdev_get_name(netdev), ovs_strerror(-ifindex));
return -ifindex;
}
block_id = get_block_id_from_netdev(netdev);
/* Flush rules explicitly needed when we work with ingress_block,
* so we will not fail with reattaching block to bond iface, for ex.
*/
id = tc_make_tcf_id(ifindex, block_id, 0, hook);
tc_del_filter(&id);
/* make sure there is no ingress/egress qdisc */
tc_add_del_qdisc(ifindex, false, 0, hook);
if (ovsthread_once_start(&once)) {
probe_tc_block_support(ifindex);
/* Need to re-fetch block id as it depends on feature availability. */
block_id = get_block_id_from_netdev(netdev);
probe_multi_mask_per_prio(ifindex);
ovsthread_once_done(&once);
}
error = tc_add_del_qdisc(ifindex, true, block_id, hook);
if (error && error != EEXIST) {
VLOG_INFO("failed adding ingress qdisc required for offloading: %s",
ovs_strerror(error));
return error;
}
VLOG_INFO("added ingress qdisc to %s", netdev_get_name(netdev));
return 0;
}
const struct netdev_flow_api netdev_offload_tc = {
.type = "linux_tc",
.flow_flush = netdev_tc_flow_flush,
.flow_dump_create = netdev_tc_flow_dump_create,
.flow_dump_destroy = netdev_tc_flow_dump_destroy,
.flow_dump_next = netdev_tc_flow_dump_next,
.flow_put = netdev_tc_flow_put,
.flow_get = netdev_tc_flow_get,
.flow_del = netdev_tc_flow_del,
.flow_get_n_flows = netdev_tc_get_n_flows,
.init_flow_api = netdev_tc_init_flow_api,
};
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