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ovs/lib/odp-execute.c
Ben Pfaff b2befd5bb2 sparse: Add guards to prevent FreeBSD-incompatible #include order. 
FreeBSD insists that <sys/types.h> be included before <netinet/in.h> and
that <netinet/in.h> be included before <arpa/inet.h>.  This adds guards to
the "sparse" headers to yield a warning if this order is violated.  This
commit also adjusts the order of many #includes to suit this requirement.

Signed-off-by: Ben Pfaff <blp@ovn.org>
Acked-by: Justin Pettit <jpettit@ovn.org>
2017-12-22 12:58:02 -08:00

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/*
* Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014, 2015 Nicira, Inc.
* Copyright (c) 2013 Simon Horman
*
* 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 "odp-execute.h"
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netinet/icmp6.h>
#include <netinet/ip6.h>
#include <stdlib.h>
#include <string.h>
#include "dp-packet.h"
#include "dpif.h"
#include "netlink.h"
#include "odp-netlink.h"
#include "odp-util.h"
#include "packets.h"
#include "flow.h"
#include "unaligned.h"
#include "util.h"
#include "csum.h"
/* Masked copy of an ethernet address. 'src' is already properly masked. */
static void
ether_addr_copy_masked(struct eth_addr *dst, const struct eth_addr src,
const struct eth_addr mask)
{
int i;
for (i = 0; i < ARRAY_SIZE(dst->be16); i++) {
dst->be16[i] = src.be16[i] | (dst->be16[i] & ~mask.be16[i]);
}
}
static void
odp_eth_set_addrs(struct dp_packet *packet, const struct ovs_key_ethernet *key,
const struct ovs_key_ethernet *mask)
{
struct eth_header *eh = dp_packet_eth(packet);
if (eh) {
if (!mask) {
eh->eth_src = key->eth_src;
eh->eth_dst = key->eth_dst;
} else {
ether_addr_copy_masked(&eh->eth_src, key->eth_src, mask->eth_src);
ether_addr_copy_masked(&eh->eth_dst, key->eth_dst, mask->eth_dst);
}
}
}
static void
odp_set_ipv4(struct dp_packet *packet, const struct ovs_key_ipv4 *key,
const struct ovs_key_ipv4 *mask)
{
struct ip_header *nh = dp_packet_l3(packet);
ovs_be32 ip_src_nh;
ovs_be32 ip_dst_nh;
ovs_be32 new_ip_src;
ovs_be32 new_ip_dst;
uint8_t new_tos;
uint8_t new_ttl;
if (mask->ipv4_src) {
ip_src_nh = get_16aligned_be32(&nh->ip_src);
new_ip_src = key->ipv4_src | (ip_src_nh & ~mask->ipv4_src);
if (ip_src_nh != new_ip_src) {
packet_set_ipv4_addr(packet, &nh->ip_src, new_ip_src);
}
}
if (mask->ipv4_dst) {
ip_dst_nh = get_16aligned_be32(&nh->ip_dst);
new_ip_dst = key->ipv4_dst | (ip_dst_nh & ~mask->ipv4_dst);
if (ip_dst_nh != new_ip_dst) {
packet_set_ipv4_addr(packet, &nh->ip_dst, new_ip_dst);
}
}
if (mask->ipv4_tos) {
new_tos = key->ipv4_tos | (nh->ip_tos & ~mask->ipv4_tos);
if (nh->ip_tos != new_tos) {
nh->ip_csum = recalc_csum16(nh->ip_csum,
htons((uint16_t) nh->ip_tos),
htons((uint16_t) new_tos));
nh->ip_tos = new_tos;
}
}
if (OVS_LIKELY(mask->ipv4_ttl)) {
new_ttl = key->ipv4_ttl | (nh->ip_ttl & ~mask->ipv4_ttl);
if (OVS_LIKELY(nh->ip_ttl != new_ttl)) {
nh->ip_csum = recalc_csum16(nh->ip_csum, htons(nh->ip_ttl << 8),
htons(new_ttl << 8));
nh->ip_ttl = new_ttl;
}
}
}
static struct in6_addr *
mask_ipv6_addr(const ovs_16aligned_be32 *old, const struct in6_addr *addr,
const struct in6_addr *mask, struct in6_addr *masked)
{
#ifdef s6_addr32
for (int i = 0; i < 4; i++) {
masked->s6_addr32[i] = addr->s6_addr32[i]
| (get_16aligned_be32(&old[i]) & ~mask->s6_addr32[i]);
}
#else
const uint8_t *old8 = (const uint8_t *)old;
for (int i = 0; i < 16; i++) {
masked->s6_addr[i] = addr->s6_addr[i] | (old8[i] & ~mask->s6_addr[i]);
}
#endif
return masked;
}
static void
odp_set_ipv6(struct dp_packet *packet, const struct ovs_key_ipv6 *key,
const struct ovs_key_ipv6 *mask)
{
struct ovs_16aligned_ip6_hdr *nh = dp_packet_l3(packet);
struct in6_addr sbuf, dbuf;
uint8_t old_tc = ntohl(get_16aligned_be32(&nh->ip6_flow)) >> 20;
ovs_be32 old_fl = get_16aligned_be32(&nh->ip6_flow) & htonl(0xfffff);
packet_set_ipv6(
packet,
mask_ipv6_addr(nh->ip6_src.be32, &key->ipv6_src, &mask->ipv6_src,
&sbuf),
mask_ipv6_addr(nh->ip6_dst.be32, &key->ipv6_dst, &mask->ipv6_dst,
&dbuf),
key->ipv6_tclass | (old_tc & ~mask->ipv6_tclass),
key->ipv6_label | (old_fl & ~mask->ipv6_label),
key->ipv6_hlimit | (nh->ip6_hlim & ~mask->ipv6_hlimit));
}
static void
odp_set_tcp(struct dp_packet *packet, const struct ovs_key_tcp *key,
const struct ovs_key_tcp *mask)
{
struct tcp_header *th = dp_packet_l4(packet);
if (OVS_LIKELY(th && dp_packet_get_tcp_payload(packet))) {
packet_set_tcp_port(packet,
key->tcp_src | (th->tcp_src & ~mask->tcp_src),
key->tcp_dst | (th->tcp_dst & ~mask->tcp_dst));
}
}
static void
odp_set_udp(struct dp_packet *packet, const struct ovs_key_udp *key,
const struct ovs_key_udp *mask)
{
struct udp_header *uh = dp_packet_l4(packet);
if (OVS_LIKELY(uh && dp_packet_get_udp_payload(packet))) {
packet_set_udp_port(packet,
key->udp_src | (uh->udp_src & ~mask->udp_src),
key->udp_dst | (uh->udp_dst & ~mask->udp_dst));
}
}
static void
odp_set_sctp(struct dp_packet *packet, const struct ovs_key_sctp *key,
const struct ovs_key_sctp *mask)
{
struct sctp_header *sh = dp_packet_l4(packet);
if (OVS_LIKELY(sh && dp_packet_get_sctp_payload(packet))) {
packet_set_sctp_port(packet,
key->sctp_src | (sh->sctp_src & ~mask->sctp_src),
key->sctp_dst | (sh->sctp_dst & ~mask->sctp_dst));
}
}
static void
odp_set_tunnel_action(const struct nlattr *a, struct flow_tnl *tun_key)
{
enum odp_key_fitness fitness;
fitness = odp_tun_key_from_attr(a, tun_key);
ovs_assert(fitness != ODP_FIT_ERROR);
}
static void
set_arp(struct dp_packet *packet, const struct ovs_key_arp *key,
const struct ovs_key_arp *mask)
{
struct arp_eth_header *arp = dp_packet_l3(packet);
if (!mask) {
arp->ar_op = key->arp_op;
arp->ar_sha = key->arp_sha;
put_16aligned_be32(&arp->ar_spa, key->arp_sip);
arp->ar_tha = key->arp_tha;
put_16aligned_be32(&arp->ar_tpa, key->arp_tip);
} else {
ovs_be32 ar_spa = get_16aligned_be32(&arp->ar_spa);
ovs_be32 ar_tpa = get_16aligned_be32(&arp->ar_tpa);
arp->ar_op = key->arp_op | (arp->ar_op & ~mask->arp_op);
ether_addr_copy_masked(&arp->ar_sha, key->arp_sha, mask->arp_sha);
put_16aligned_be32(&arp->ar_spa,
key->arp_sip | (ar_spa & ~mask->arp_sip));
ether_addr_copy_masked(&arp->ar_tha, key->arp_tha, mask->arp_tha);
put_16aligned_be32(&arp->ar_tpa,
key->arp_tip | (ar_tpa & ~mask->arp_tip));
}
}
static void
odp_set_nd(struct dp_packet *packet, const struct ovs_key_nd *key,
const struct ovs_key_nd *mask)
{
const struct ovs_nd_msg *ns = dp_packet_l4(packet);
const struct ovs_nd_lla_opt *lla_opt = dp_packet_get_nd_payload(packet);
if (OVS_LIKELY(ns && lla_opt)) {
int bytes_remain = dp_packet_l4_size(packet) - sizeof(*ns);
struct in6_addr tgt_buf;
struct eth_addr sll_buf = eth_addr_zero;
struct eth_addr tll_buf = eth_addr_zero;
while (bytes_remain >= ND_LLA_OPT_LEN && lla_opt->len != 0) {
if (lla_opt->type == ND_OPT_SOURCE_LINKADDR
&& lla_opt->len == 1) {
sll_buf = lla_opt->mac;
ether_addr_copy_masked(&sll_buf, key->nd_sll, mask->nd_sll);
/* A packet can only contain one SLL or TLL option */
break;
} else if (lla_opt->type == ND_OPT_TARGET_LINKADDR
&& lla_opt->len == 1) {
tll_buf = lla_opt->mac;
ether_addr_copy_masked(&tll_buf, key->nd_tll, mask->nd_tll);
/* A packet can only contain one SLL or TLL option */
break;
}
lla_opt += lla_opt->len;
bytes_remain -= lla_opt->len * ND_LLA_OPT_LEN;
}
packet_set_nd(packet,
mask_ipv6_addr(ns->target.be32, &key->nd_target,
&mask->nd_target, &tgt_buf),
sll_buf,
tll_buf);
}
}
/* Set the NSH header. Assumes the NSH header is present and matches the
* MD format of the key. The slow path must take case of that. */
static void
odp_set_nsh(struct dp_packet *packet, const struct ovs_key_nsh *key,
const struct ovs_key_nsh *mask)
{
struct nsh_hdr *nsh = dp_packet_l3(packet);
uint8_t mdtype = nsh_md_type(nsh);
if (!mask) {
nsh->ver_flags_ttl_len = htons(key->flags << NSH_FLAGS_SHIFT) |
(nsh->ver_flags_ttl_len & ~htons(NSH_FLAGS_MASK));
put_16aligned_be32(&nsh->path_hdr, key->path_hdr);
switch (mdtype) {
case NSH_M_TYPE1:
for (int i = 0; i < 4; i++) {
put_16aligned_be32(&nsh->md1.c[i], key->c[i]);
}
break;
case NSH_M_TYPE2:
default:
/* No support for setting any other metadata format yet. */
break;
}
} else {
uint8_t flags = (ntohs(nsh->ver_flags_ttl_len) & NSH_FLAGS_MASK) >>
NSH_FLAGS_SHIFT;
flags = key->flags | (flags & ~mask->flags);
nsh->ver_flags_ttl_len = htons(flags << NSH_FLAGS_SHIFT) |
(nsh->ver_flags_ttl_len & ~htons(NSH_FLAGS_MASK));
ovs_be32 path_hdr = get_16aligned_be32(&nsh->path_hdr);
path_hdr = key->path_hdr | (path_hdr & ~mask->path_hdr);
put_16aligned_be32(&nsh->path_hdr, path_hdr);
switch (mdtype) {
case NSH_M_TYPE1:
for (int i = 0; i < 4; i++) {
ovs_be32 p = get_16aligned_be32(&nsh->md1.c[i]);
ovs_be32 k = key->c[i];
ovs_be32 m = mask->c[i];
put_16aligned_be32(&nsh->md1.c[i], k | (p & ~m));
}
break;
case NSH_M_TYPE2:
default:
/* No support for setting any other metadata format yet. */
break;
}
}
}
static void
odp_execute_set_action(struct dp_packet *packet, const struct nlattr *a)
{
enum ovs_key_attr type = nl_attr_type(a);
const struct ovs_key_ipv4 *ipv4_key;
const struct ovs_key_ipv6 *ipv6_key;
struct pkt_metadata *md = &packet->md;
switch (type) {
case OVS_KEY_ATTR_PRIORITY:
md->skb_priority = nl_attr_get_u32(a);
break;
case OVS_KEY_ATTR_TUNNEL:
odp_set_tunnel_action(a, &md->tunnel);
break;
case OVS_KEY_ATTR_SKB_MARK:
md->pkt_mark = nl_attr_get_u32(a);
break;
case OVS_KEY_ATTR_ETHERNET:
odp_eth_set_addrs(packet, nl_attr_get(a), NULL);
break;
case OVS_KEY_ATTR_NSH:
odp_set_nsh(packet, nl_attr_get(a), NULL);
break;
case OVS_KEY_ATTR_IPV4:
ipv4_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_ipv4));
packet_set_ipv4(packet, ipv4_key->ipv4_src,
ipv4_key->ipv4_dst, ipv4_key->ipv4_tos,
ipv4_key->ipv4_ttl);
break;
case OVS_KEY_ATTR_IPV6:
ipv6_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_ipv6));
packet_set_ipv6(packet, &ipv6_key->ipv6_src, &ipv6_key->ipv6_dst,
ipv6_key->ipv6_tclass, ipv6_key->ipv6_label,
ipv6_key->ipv6_hlimit);
break;
case OVS_KEY_ATTR_TCP:
if (OVS_LIKELY(dp_packet_get_tcp_payload(packet))) {
const struct ovs_key_tcp *tcp_key
= nl_attr_get_unspec(a, sizeof(struct ovs_key_tcp));
packet_set_tcp_port(packet, tcp_key->tcp_src,
tcp_key->tcp_dst);
}
break;
case OVS_KEY_ATTR_UDP:
if (OVS_LIKELY(dp_packet_get_udp_payload(packet))) {
const struct ovs_key_udp *udp_key
= nl_attr_get_unspec(a, sizeof(struct ovs_key_udp));
packet_set_udp_port(packet, udp_key->udp_src,
udp_key->udp_dst);
}
break;
case OVS_KEY_ATTR_SCTP:
if (OVS_LIKELY(dp_packet_get_sctp_payload(packet))) {
const struct ovs_key_sctp *sctp_key
= nl_attr_get_unspec(a, sizeof(struct ovs_key_sctp));
packet_set_sctp_port(packet, sctp_key->sctp_src,
sctp_key->sctp_dst);
}
break;
case OVS_KEY_ATTR_MPLS:
set_mpls_lse(packet, nl_attr_get_be32(a));
break;
case OVS_KEY_ATTR_ARP:
set_arp(packet, nl_attr_get(a), NULL);
break;
case OVS_KEY_ATTR_ICMP:
case OVS_KEY_ATTR_ICMPV6:
if (OVS_LIKELY(dp_packet_get_icmp_payload(packet))) {
const struct ovs_key_icmp *icmp_key
= nl_attr_get_unspec(a, sizeof(struct ovs_key_icmp));
packet_set_icmp(packet, icmp_key->icmp_type, icmp_key->icmp_code);
}
break;
case OVS_KEY_ATTR_ND:
if (OVS_LIKELY(dp_packet_get_nd_payload(packet))) {
const struct ovs_key_nd *nd_key
= nl_attr_get_unspec(a, sizeof(struct ovs_key_nd));
packet_set_nd(packet, &nd_key->nd_target, nd_key->nd_sll,
nd_key->nd_tll);
}
break;
case OVS_KEY_ATTR_DP_HASH:
md->dp_hash = nl_attr_get_u32(a);
break;
case OVS_KEY_ATTR_RECIRC_ID:
md->recirc_id = nl_attr_get_u32(a);
break;
case OVS_KEY_ATTR_UNSPEC:
case OVS_KEY_ATTR_PACKET_TYPE:
case OVS_KEY_ATTR_ENCAP:
case OVS_KEY_ATTR_ETHERTYPE:
case OVS_KEY_ATTR_IN_PORT:
case OVS_KEY_ATTR_VLAN:
case OVS_KEY_ATTR_TCP_FLAGS:
case OVS_KEY_ATTR_CT_STATE:
case OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4:
case OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6:
case OVS_KEY_ATTR_CT_ZONE:
case OVS_KEY_ATTR_CT_MARK:
case OVS_KEY_ATTR_CT_LABELS:
case __OVS_KEY_ATTR_MAX:
default:
OVS_NOT_REACHED();
}
}
#define get_mask(a, type) ((const type *)(const void *)(a + 1) + 1)
static void
odp_execute_masked_set_action(struct dp_packet *packet,
const struct nlattr *a)
{
struct pkt_metadata *md = &packet->md;
enum ovs_key_attr type = nl_attr_type(a);
struct mpls_hdr *mh;
switch (type) {
case OVS_KEY_ATTR_PRIORITY:
md->skb_priority = nl_attr_get_u32(a)
| (md->skb_priority & ~*get_mask(a, uint32_t));
break;
case OVS_KEY_ATTR_SKB_MARK:
md->pkt_mark = nl_attr_get_u32(a)
| (md->pkt_mark & ~*get_mask(a, uint32_t));
break;
case OVS_KEY_ATTR_ETHERNET:
odp_eth_set_addrs(packet, nl_attr_get(a),
get_mask(a, struct ovs_key_ethernet));
break;
case OVS_KEY_ATTR_NSH:
odp_set_nsh(packet, nl_attr_get(a),
get_mask(a, struct ovs_key_nsh));
break;
case OVS_KEY_ATTR_IPV4:
odp_set_ipv4(packet, nl_attr_get(a),
get_mask(a, struct ovs_key_ipv4));
break;
case OVS_KEY_ATTR_IPV6:
odp_set_ipv6(packet, nl_attr_get(a),
get_mask(a, struct ovs_key_ipv6));
break;
case OVS_KEY_ATTR_TCP:
odp_set_tcp(packet, nl_attr_get(a),
get_mask(a, struct ovs_key_tcp));
break;
case OVS_KEY_ATTR_UDP:
odp_set_udp(packet, nl_attr_get(a),
get_mask(a, struct ovs_key_udp));
break;
case OVS_KEY_ATTR_SCTP:
odp_set_sctp(packet, nl_attr_get(a),
get_mask(a, struct ovs_key_sctp));
break;
case OVS_KEY_ATTR_MPLS:
mh = dp_packet_l2_5(packet);
if (mh) {
put_16aligned_be32(&mh->mpls_lse, nl_attr_get_be32(a)
| (get_16aligned_be32(&mh->mpls_lse)
& ~*get_mask(a, ovs_be32)));
}
break;
case OVS_KEY_ATTR_ARP:
set_arp(packet, nl_attr_get(a),
get_mask(a, struct ovs_key_arp));
break;
case OVS_KEY_ATTR_ND:
odp_set_nd(packet, nl_attr_get(a),
get_mask(a, struct ovs_key_nd));
break;
case OVS_KEY_ATTR_DP_HASH:
md->dp_hash = nl_attr_get_u32(a)
| (md->dp_hash & ~*get_mask(a, uint32_t));
break;
case OVS_KEY_ATTR_RECIRC_ID:
md->recirc_id = nl_attr_get_u32(a)
| (md->recirc_id & ~*get_mask(a, uint32_t));
break;
case OVS_KEY_ATTR_TUNNEL: /* Masked data not supported for tunnel. */
case OVS_KEY_ATTR_PACKET_TYPE:
case OVS_KEY_ATTR_UNSPEC:
case OVS_KEY_ATTR_CT_STATE:
case OVS_KEY_ATTR_CT_ZONE:
case OVS_KEY_ATTR_CT_MARK:
case OVS_KEY_ATTR_CT_LABELS:
case OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4:
case OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6:
case OVS_KEY_ATTR_ENCAP:
case OVS_KEY_ATTR_ETHERTYPE:
case OVS_KEY_ATTR_IN_PORT:
case OVS_KEY_ATTR_VLAN:
case OVS_KEY_ATTR_ICMP:
case OVS_KEY_ATTR_ICMPV6:
case OVS_KEY_ATTR_TCP_FLAGS:
case __OVS_KEY_ATTR_MAX:
default:
OVS_NOT_REACHED();
}
}
static void
odp_execute_sample(void *dp, struct dp_packet *packet, bool steal,
const struct nlattr *action,
odp_execute_cb dp_execute_action)
{
const struct nlattr *subactions = NULL;
const struct nlattr *a;
struct dp_packet_batch pb;
size_t left;
NL_NESTED_FOR_EACH_UNSAFE (a, left, action) {
int type = nl_attr_type(a);
switch ((enum ovs_sample_attr) type) {
case OVS_SAMPLE_ATTR_PROBABILITY:
if (random_uint32() >= nl_attr_get_u32(a)) {
if (steal) {
dp_packet_delete(packet);
}
return;
}
break;
case OVS_SAMPLE_ATTR_ACTIONS:
subactions = a;
break;
case OVS_SAMPLE_ATTR_UNSPEC:
case __OVS_SAMPLE_ATTR_MAX:
default:
OVS_NOT_REACHED();
}
}
if (!steal) {
/* The 'subactions' may modify the packet, but the modification
* should not propagate beyond this sample action. Make a copy
* the packet in case we don't own the packet, so that the
* 'subactions' are only applid to the clone. 'odp_execute_actions'
* will free the clone. */
packet = dp_packet_clone(packet);
}
dp_packet_batch_init_packet(&pb, packet);
odp_execute_actions(dp, &pb, true, nl_attr_get(subactions),
nl_attr_get_size(subactions), dp_execute_action);
}
static void
odp_execute_clone(void *dp, struct dp_packet_batch *batch, bool steal,
const struct nlattr *actions,
odp_execute_cb dp_execute_action)
{
if (!steal) {
/* The 'actions' may modify the packet, but the modification
* should not propagate beyond this clone action. Make a copy
* the packet in case we don't own the packet, so that the
* 'actions' are only applied to the clone. 'odp_execute_actions'
* will free the clone. */
struct dp_packet_batch clone_pkt_batch;
dp_packet_batch_clone(&clone_pkt_batch, batch);
dp_packet_batch_reset_cutlen(batch);
odp_execute_actions(dp, &clone_pkt_batch, true, nl_attr_get(actions),
nl_attr_get_size(actions), dp_execute_action);
}
else {
odp_execute_actions(dp, batch, true, nl_attr_get(actions),
nl_attr_get_size(actions), dp_execute_action);
}
}
static bool
requires_datapath_assistance(const struct nlattr *a)
{
enum ovs_action_attr type = nl_attr_type(a);
switch (type) {
/* These only make sense in the context of a datapath. */
case OVS_ACTION_ATTR_OUTPUT:
case OVS_ACTION_ATTR_TUNNEL_PUSH:
case OVS_ACTION_ATTR_TUNNEL_POP:
case OVS_ACTION_ATTR_USERSPACE:
case OVS_ACTION_ATTR_RECIRC:
case OVS_ACTION_ATTR_CT:
case OVS_ACTION_ATTR_METER:
return true;
case OVS_ACTION_ATTR_SET:
case OVS_ACTION_ATTR_SET_MASKED:
case OVS_ACTION_ATTR_PUSH_VLAN:
case OVS_ACTION_ATTR_POP_VLAN:
case OVS_ACTION_ATTR_SAMPLE:
case OVS_ACTION_ATTR_HASH:
case OVS_ACTION_ATTR_PUSH_MPLS:
case OVS_ACTION_ATTR_POP_MPLS:
case OVS_ACTION_ATTR_TRUNC:
case OVS_ACTION_ATTR_PUSH_ETH:
case OVS_ACTION_ATTR_POP_ETH:
case OVS_ACTION_ATTR_CLONE:
case OVS_ACTION_ATTR_ENCAP_NSH:
case OVS_ACTION_ATTR_DECAP_NSH:
return false;
case OVS_ACTION_ATTR_UNSPEC:
case __OVS_ACTION_ATTR_MAX:
OVS_NOT_REACHED();
}
return false;
}
/* Executes all of the 'actions_len' bytes of datapath actions in 'actions' on
* the packets in 'batch'. If 'steal' is true, possibly modifies and
* definitely free the packets in 'batch', otherwise leaves 'batch' unchanged.
*
* Some actions (e.g. output actions) can only be executed by a datapath. This
* function implements those actions by passing the action and the packets to
* 'dp_execute_action' (along with 'dp'). If 'dp_execute_action' is passed a
* true 'may_steal' parameter then it may possibly modify and must definitely
* free the packets passed into it, otherwise it must leave them unchanged. */
void
odp_execute_actions(void *dp, struct dp_packet_batch *batch, bool steal,
const struct nlattr *actions, size_t actions_len,
odp_execute_cb dp_execute_action)
{
struct dp_packet *packet;
const struct nlattr *a;
unsigned int left;
NL_ATTR_FOR_EACH_UNSAFE (a, left, actions, actions_len) {
int type = nl_attr_type(a);
bool last_action = (left <= NLA_ALIGN(a->nla_len));
if (requires_datapath_assistance(a)) {
if (dp_execute_action) {
/* Allow 'dp_execute_action' to steal the packet data if we do
* not need it any more. */
bool may_steal = steal && last_action;
dp_execute_action(dp, batch, a, may_steal);
if (last_action || batch->count == 0) {
/* We do not need to free the packets.
* Either dp_execute_actions() has stolen them
* or the batch is freed due to errors. In either
* case we do not need to execute further actions.
*/
return;
}
}
continue;
}
switch ((enum ovs_action_attr) type) {
case OVS_ACTION_ATTR_HASH: {
const struct ovs_action_hash *hash_act = nl_attr_get(a);
/* Calculate a hash value directly. This might not match the
* value computed by the datapath, but it is much less expensive,
* and the current use case (bonding) does not require a strict
* match to work properly. */
if (hash_act->hash_alg == OVS_HASH_ALG_L4) {
struct flow flow;
uint32_t hash;
DP_PACKET_BATCH_FOR_EACH (packet, batch) {
/* RSS hash can be used here instead of 5tuple for
* performance reasons. */
if (dp_packet_rss_valid(packet)) {
hash = dp_packet_get_rss_hash(packet);
hash = hash_int(hash, hash_act->hash_basis);
} else {
flow_extract(packet, &flow);
hash = flow_hash_5tuple(&flow, hash_act->hash_basis);
}
packet->md.dp_hash = hash;
}
} else {
/* Assert on unknown hash algorithm. */
OVS_NOT_REACHED();
}
break;
}
case OVS_ACTION_ATTR_PUSH_VLAN: {
const struct ovs_action_push_vlan *vlan = nl_attr_get(a);
DP_PACKET_BATCH_FOR_EACH (packet, batch) {
eth_push_vlan(packet, vlan->vlan_tpid, vlan->vlan_tci);
}
break;
}
case OVS_ACTION_ATTR_POP_VLAN:
DP_PACKET_BATCH_FOR_EACH (packet, batch) {
eth_pop_vlan(packet);
}
break;
case OVS_ACTION_ATTR_PUSH_MPLS: {
const struct ovs_action_push_mpls *mpls = nl_attr_get(a);
DP_PACKET_BATCH_FOR_EACH (packet, batch) {
push_mpls(packet, mpls->mpls_ethertype, mpls->mpls_lse);
}
break;
}
case OVS_ACTION_ATTR_POP_MPLS:
DP_PACKET_BATCH_FOR_EACH (packet, batch) {
pop_mpls(packet, nl_attr_get_be16(a));
}
break;
case OVS_ACTION_ATTR_SET:
DP_PACKET_BATCH_FOR_EACH (packet, batch) {
odp_execute_set_action(packet, nl_attr_get(a));
}
break;
case OVS_ACTION_ATTR_SET_MASKED:
DP_PACKET_BATCH_FOR_EACH(packet, batch) {
odp_execute_masked_set_action(packet, nl_attr_get(a));
}
break;
case OVS_ACTION_ATTR_SAMPLE:
DP_PACKET_BATCH_FOR_EACH (packet, batch) {
odp_execute_sample(dp, packet, steal && last_action, a,
dp_execute_action);
}
if (last_action) {
/* We do not need to free the packets. odp_execute_sample() has
* stolen them*/
return;
}
break;
case OVS_ACTION_ATTR_TRUNC: {
const struct ovs_action_trunc *trunc =
nl_attr_get_unspec(a, sizeof *trunc);
batch->trunc = true;
DP_PACKET_BATCH_FOR_EACH (packet, batch) {
dp_packet_set_cutlen(packet, trunc->max_len);
}
break;
}
case OVS_ACTION_ATTR_CLONE:
odp_execute_clone(dp, batch, steal && last_action, a,
dp_execute_action);
if (last_action) {
/* We do not need to free the packets. odp_execute_clone() has
* stolen them. */
return;
}
break;
case OVS_ACTION_ATTR_METER:
/* Not implemented yet. */
break;
case OVS_ACTION_ATTR_PUSH_ETH: {
const struct ovs_action_push_eth *eth = nl_attr_get(a);
DP_PACKET_BATCH_FOR_EACH (packet, batch) {
push_eth(packet, &eth->addresses.eth_dst,
&eth->addresses.eth_src);
}
break;
}
case OVS_ACTION_ATTR_POP_ETH:
DP_PACKET_BATCH_FOR_EACH (packet, batch) {
pop_eth(packet);
}
break;
case OVS_ACTION_ATTR_ENCAP_NSH: {
const struct ovs_action_encap_nsh *enc_nsh = nl_attr_get(a);
DP_PACKET_BATCH_FOR_EACH (packet, batch) {
encap_nsh(packet, enc_nsh);
}
break;
}
case OVS_ACTION_ATTR_DECAP_NSH: {
size_t i;
const size_t num = dp_packet_batch_size(batch);
DP_PACKET_BATCH_REFILL_FOR_EACH (i, num, packet, batch) {
if (decap_nsh(packet)) {
dp_packet_batch_refill(batch, packet, i);
} else {
dp_packet_delete(packet);
}
}
break;
}
case OVS_ACTION_ATTR_OUTPUT:
case OVS_ACTION_ATTR_TUNNEL_PUSH:
case OVS_ACTION_ATTR_TUNNEL_POP:
case OVS_ACTION_ATTR_USERSPACE:
case OVS_ACTION_ATTR_RECIRC:
case OVS_ACTION_ATTR_CT:
case OVS_ACTION_ATTR_UNSPEC:
case __OVS_ACTION_ATTR_MAX:
OVS_NOT_REACHED();
}
}
dp_packet_delete_batch(batch, steal);
}
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