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ovs/lib/odp-util.c
Eelco Chaudron 252ee0f182 dpif: Fix flow put debug message match content. 
The odp_flow_format() function applies a wildcard mask when a
mask for a given key was not present. However, in the context of
installing flows in the datapath, the absence of a mask actually
indicates that the key should be ignored, meaning it should not
be masked at all.

To address this inconsistency, odp_flow_format() now includes an
option to skip formatting keys that are missing a mask.

This was found during a debug session of the ‘datapath - ping between two
ports on cvlan’ test case. The log message was showing the following:

  put[create] ufid:XX recirc_id(0),dp_hash(0/0),skb_priority(0/0),in_port(3),
    skb_mark(0/0),ct_state(0/0),ct_zone(0/0),ct_mark(0/0),ct_label(0/0),
    eth(src=12:f6:8b:52:f9:75,dst=6e:48:c8:77:d3:8c),eth_type(0x88a8),
    vlan(vid=4094,pcp=0/0x0),encap(eth_type(0x8100),
    vlan(vid=100/0x0,pcp=0/0x0),encap(eth_type(0x0800),
    ipv4(src=10.2.2.2,dst=10.2.2.1,proto=1,tos=0,ttl=64,frag=no),
    icmp(type=0,code=0))), actions:2

Where it should have shown the below:

  put[create] ufid:XX recirc_id(0),dp_hash(0/0),skb_priority(0/0),in_port(3),
    skb_mark(0/0),ct_state(0/0),ct_zone(0/0),ct_mark(0/0),ct_label(0/0),
    eth(src=12:f6:8b:52:f9:75,dst=6e:48:c8:77:d3:8c),eth_type(0x88a8),
    vlan(vid=4094,pcp=0/0x0),encap(eth_type(0x8100)), actions:2

Acked-by: Simon Horman <horms@ovn.org>
Signed-off-by: Eelco Chaudron <echaudro@redhat.com>
2024-09-09 10:22:16 +02:00

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/*
* Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2019 Nicira, Inc.
*
* 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 <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "odp-util.h"
#include <errno.h>
#include <inttypes.h>
#include <math.h>
#include <netinet/icmp6.h>
#include <netinet/ip6.h>
#include <stdlib.h>
#include <string.h>
#include "byte-order.h"
#include "coverage.h"
#include "dpif.h"
#include "openvswitch/dynamic-string.h"
#include "flow.h"
#include "netlink.h"
#include "openvswitch/ofpbuf.h"
#include "packets.h"
#include "simap.h"
#include "timeval.h"
#include "tun-metadata.h"
#include "unaligned.h"
#include "util.h"
#include "uuid.h"
#include "openvswitch/vlog.h"
#include "openvswitch/match.h"
#include "odp-netlink-macros.h"
#include "csum.h"
VLOG_DEFINE_THIS_MODULE(odp_util);
/* The interface between userspace and kernel uses an "OVS_*" prefix.
* Since this is fairly non-specific for the OVS userspace components,
* "ODP_*" (Open vSwitch Datapath) is used as the prefix for
* interactions with the datapath.
*/
/* The set of characters that may separate one action or one key attribute
* from another. */
static const char *delimiters = ", \t\r\n";
static const char *delimiters_end = ", \t\r\n)";
#define MAX_ODP_NESTED 32
struct parse_odp_context {
const struct simap *port_names;
int depth; /* Current nested depth of odp string. */
};
static int parse_odp_key_mask_attr(struct parse_odp_context *, const char *,
struct ofpbuf *, struct ofpbuf *);
static int parse_odp_key_mask_attr__(struct parse_odp_context *, const char *,
struct ofpbuf *, struct ofpbuf *);
static void format_odp_key_attr(const struct nlattr *a,
const struct nlattr *ma,
const struct hmap *portno_names, struct ds *ds,
bool verbose);
struct geneve_scan {
struct geneve_opt d[63];
int len;
};
static int scan_geneve(const char *s, struct geneve_scan *key,
struct geneve_scan *mask);
static void format_geneve_opts(const struct geneve_opt *opt,
const struct geneve_opt *mask, int opts_len,
struct ds *, bool verbose);
static struct nlattr *generate_all_wildcard_mask(const struct attr_len_tbl tbl[],
int max, struct ofpbuf *,
const struct nlattr *key);
static void format_u128(struct ds *d, const ovs_32aligned_u128 *key,
const ovs_32aligned_u128 *mask, bool verbose);
static int scan_u128(const char *s, ovs_u128 *value, ovs_u128 *mask);
static int parse_odp_action(struct parse_odp_context *context, const char *s,
struct ofpbuf *actions);
static int parse_odp_action__(struct parse_odp_context *context, const char *s,
struct ofpbuf *actions);
/* Returns one the following for the action with the given OVS_ACTION_ATTR_*
* 'type':
*
* - For an action whose argument has a fixed length, returned that
* nonnegative length in bytes.
*
* - For an action with a variable-length argument, returns ATTR_LEN_VARIABLE.
*
* - For an invalid 'type', returns ATTR_LEN_INVALID. */
static int
odp_action_len(uint16_t type)
{
if (type > OVS_ACTION_ATTR_MAX) {
return -1;
}
switch ((enum ovs_action_attr) type) {
case OVS_ACTION_ATTR_OUTPUT: return sizeof(uint32_t);
case OVS_ACTION_ATTR_LB_OUTPUT: return sizeof(uint32_t);
case OVS_ACTION_ATTR_TRUNC: return sizeof(struct ovs_action_trunc);
case OVS_ACTION_ATTR_TUNNEL_PUSH: return ATTR_LEN_VARIABLE;
case OVS_ACTION_ATTR_TUNNEL_POP: return sizeof(uint32_t);
case OVS_ACTION_ATTR_METER: return sizeof(uint32_t);
case OVS_ACTION_ATTR_USERSPACE: return ATTR_LEN_VARIABLE;
case OVS_ACTION_ATTR_PUSH_VLAN: return sizeof(struct ovs_action_push_vlan);
case OVS_ACTION_ATTR_POP_VLAN: return 0;
case OVS_ACTION_ATTR_PUSH_MPLS: return sizeof(struct ovs_action_push_mpls);
case OVS_ACTION_ATTR_POP_MPLS: return sizeof(ovs_be16);
case OVS_ACTION_ATTR_RECIRC: return sizeof(uint32_t);
case OVS_ACTION_ATTR_HASH: return sizeof(struct ovs_action_hash);
case OVS_ACTION_ATTR_SET: return ATTR_LEN_VARIABLE;
case OVS_ACTION_ATTR_SET_MASKED: return ATTR_LEN_VARIABLE;
case OVS_ACTION_ATTR_SAMPLE: return ATTR_LEN_VARIABLE;
case OVS_ACTION_ATTR_CT: return ATTR_LEN_VARIABLE;
case OVS_ACTION_ATTR_CT_CLEAR: return 0;
case OVS_ACTION_ATTR_PUSH_ETH: return sizeof(struct ovs_action_push_eth);
case OVS_ACTION_ATTR_POP_ETH: return 0;
case OVS_ACTION_ATTR_CLONE: return ATTR_LEN_VARIABLE;
case OVS_ACTION_ATTR_PUSH_NSH: return ATTR_LEN_VARIABLE;
case OVS_ACTION_ATTR_POP_NSH: return 0;
case OVS_ACTION_ATTR_CHECK_PKT_LEN: return ATTR_LEN_VARIABLE;
case OVS_ACTION_ATTR_ADD_MPLS: return sizeof(struct ovs_action_add_mpls);
case OVS_ACTION_ATTR_DEC_TTL: return ATTR_LEN_VARIABLE;
case OVS_ACTION_ATTR_DROP: return sizeof(uint32_t);
case OVS_ACTION_ATTR_PSAMPLE: return ATTR_LEN_VARIABLE;
case OVS_ACTION_ATTR_UNSPEC:
case __OVS_ACTION_ATTR_MAX:
return ATTR_LEN_INVALID;
}
return ATTR_LEN_INVALID;
}
/* Returns a string form of 'attr'. The return value is either a statically
* allocated constant string or the 'bufsize'-byte buffer 'namebuf'. 'bufsize'
* should be at least OVS_KEY_ATTR_BUFSIZE. */
enum { OVS_KEY_ATTR_BUFSIZE = 3 + INT_STRLEN(unsigned int) + 1 };
static const char *
ovs_key_attr_to_string(enum ovs_key_attr attr, char *namebuf, size_t bufsize)
{
switch (attr) {
case OVS_KEY_ATTR_UNSPEC: return "unspec";
case OVS_KEY_ATTR_ENCAP: return "encap";
case OVS_KEY_ATTR_PRIORITY: return "skb_priority";
case OVS_KEY_ATTR_SKB_MARK: return "skb_mark";
case OVS_KEY_ATTR_CT_STATE: return "ct_state";
case OVS_KEY_ATTR_CT_ZONE: return "ct_zone";
case OVS_KEY_ATTR_CT_MARK: return "ct_mark";
case OVS_KEY_ATTR_CT_LABELS: return "ct_label";
case OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4: return "ct_tuple4";
case OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6: return "ct_tuple6";
case OVS_KEY_ATTR_TUNNEL: return "tunnel";
case OVS_KEY_ATTR_IN_PORT: return "in_port";
case OVS_KEY_ATTR_ETHERNET: return "eth";
case OVS_KEY_ATTR_VLAN: return "vlan";
case OVS_KEY_ATTR_ETHERTYPE: return "eth_type";
case OVS_KEY_ATTR_IPV4: return "ipv4";
case OVS_KEY_ATTR_IPV6: return "ipv6";
case OVS_KEY_ATTR_TCP: return "tcp";
case OVS_KEY_ATTR_TCP_FLAGS: return "tcp_flags";
case OVS_KEY_ATTR_UDP: return "udp";
case OVS_KEY_ATTR_SCTP: return "sctp";
case OVS_KEY_ATTR_ICMP: return "icmp";
case OVS_KEY_ATTR_ICMPV6: return "icmpv6";
case OVS_KEY_ATTR_ARP: return "arp";
case OVS_KEY_ATTR_ND: return "nd";
case OVS_KEY_ATTR_ND_EXTENSIONS: return "nd_ext";
case OVS_KEY_ATTR_MPLS: return "mpls";
case OVS_KEY_ATTR_DP_HASH: return "dp_hash";
case OVS_KEY_ATTR_RECIRC_ID: return "recirc_id";
case OVS_KEY_ATTR_PACKET_TYPE: return "packet_type";
case OVS_KEY_ATTR_NSH: return "nsh";
case OVS_KEY_ATTR_TUNNEL_INFO: return "<error: kernel-only tunnel_info>";
case __OVS_KEY_ATTR_MAX:
default:
snprintf(namebuf, bufsize, "key%u", (unsigned int) attr);
return namebuf;
}
}
static void
format_generic_odp_action(struct ds *ds, const struct nlattr *a)
{
size_t len = nl_attr_get_size(a);
ds_put_format(ds, "action%d", nl_attr_type(a));
if (len) {
const uint8_t *unspec;
unsigned int i;
unspec = nl_attr_get(a);
for (i = 0; i < len; i++) {
ds_put_char(ds, i ? ' ': '(');
ds_put_format(ds, "%02x", unspec[i]);
}
ds_put_char(ds, ')');
}
}
static void
format_odp_sample_action(struct ds *ds, const struct nlattr *attr,
const struct hmap *portno_names)
{
static const struct nl_policy ovs_sample_policy[] = {
[OVS_SAMPLE_ATTR_PROBABILITY] = { .type = NL_A_U32 },
[OVS_SAMPLE_ATTR_ACTIONS] = { .type = NL_A_NESTED }
};
struct nlattr *a[ARRAY_SIZE(ovs_sample_policy)];
double percentage;
const struct nlattr *nla_acts;
int len;
ds_put_cstr(ds, "sample");
if (!nl_parse_nested(attr, ovs_sample_policy, a, ARRAY_SIZE(a))) {
ds_put_cstr(ds, "(error)");
return;
}
percentage = (100.0 * nl_attr_get_u32(a[OVS_SAMPLE_ATTR_PROBABILITY])) /
UINT32_MAX;
ds_put_format(ds, "(sample=%.1f%%,", percentage);
ds_put_cstr(ds, "actions(");
nla_acts = nl_attr_get(a[OVS_SAMPLE_ATTR_ACTIONS]);
len = nl_attr_get_size(a[OVS_SAMPLE_ATTR_ACTIONS]);
format_odp_actions(ds, nla_acts, len, portno_names);
ds_put_format(ds, "))");
}
static void
format_odp_clone_action(struct ds *ds, const struct nlattr *attr,
const struct hmap *portno_names)
{
const struct nlattr *nla_acts = nl_attr_get(attr);
int len = nl_attr_get_size(attr);
ds_put_cstr(ds, "clone");
ds_put_format(ds, "(");
format_odp_actions(ds, nla_acts, len, portno_names);
ds_put_format(ds, ")");
}
static void
format_nsh_key(struct ds *ds, const struct ovs_key_nsh *key)
{
ds_put_format(ds, "flags=%d", key->flags);
ds_put_format(ds, ",ttl=%d", key->ttl);
ds_put_format(ds, ",mdtype=%d", key->mdtype);
ds_put_format(ds, ",np=%d", key->np);
ds_put_format(ds, ",spi=0x%x",
nsh_path_hdr_to_spi_uint32(key->path_hdr));
ds_put_format(ds, ",si=%d",
nsh_path_hdr_to_si(key->path_hdr));
switch (key->mdtype) {
case NSH_M_TYPE1:
for (int i = 0; i < 4; i++) {
ds_put_format(ds, ",c%d=0x%x", i + 1, ntohl(key->context[i]));
}
break;
case NSH_M_TYPE2:
default:
/* No support for matching other metadata formats yet. */
break;
}
}
static void
format_uint8_masked(struct ds *s, bool *first, const char *name,
uint8_t value, uint8_t mask)
{
if (mask != 0) {
if (!*first) {
ds_put_char(s, ',');
}
ds_put_format(s, "%s=", name);
if (mask == UINT8_MAX) {
ds_put_format(s, "%"PRIu8, value);
} else {
ds_put_format(s, "0x%02"PRIx8"/0x%02"PRIx8, value, mask);
}
*first = false;
}
}
static void
format_be32_masked(struct ds *s, bool *first, const char *name,
ovs_be32 value, ovs_be32 mask)
{
if (mask != htonl(0)) {
if (!*first) {
ds_put_char(s, ',');
}
ds_put_format(s, "%s=", name);
if (mask == OVS_BE32_MAX) {
ds_put_format(s, "0x%"PRIx32, ntohl(value));
} else {
ds_put_format(s, "0x%"PRIx32"/0x%08"PRIx32,
ntohl(value), ntohl(mask));
}
*first = false;
}
}
static void
format_nsh_key_mask(struct ds *ds, const struct ovs_key_nsh *key,
const struct ovs_key_nsh *mask)
{
if (!mask) {
format_nsh_key(ds, key);
} else {
bool first = true;
uint32_t spi = nsh_path_hdr_to_spi_uint32(key->path_hdr);
uint32_t spi_mask = nsh_path_hdr_to_spi_uint32(mask->path_hdr);
if (spi_mask == (NSH_SPI_MASK >> NSH_SPI_SHIFT)) {
spi_mask = UINT32_MAX;
}
uint8_t si = nsh_path_hdr_to_si(key->path_hdr);
uint8_t si_mask = nsh_path_hdr_to_si(mask->path_hdr);
format_uint8_masked(ds, &first, "flags", key->flags, mask->flags);
format_uint8_masked(ds, &first, "ttl", key->ttl, mask->ttl);
format_uint8_masked(ds, &first, "mdtype", key->mdtype, mask->mdtype);
format_uint8_masked(ds, &first, "np", key->np, mask->np);
format_be32_masked(ds, &first, "spi", htonl(spi), htonl(spi_mask));
format_uint8_masked(ds, &first, "si", si, si_mask);
format_be32_masked(ds, &first, "c1", key->context[0],
mask->context[0]);
format_be32_masked(ds, &first, "c2", key->context[1],
mask->context[1]);
format_be32_masked(ds, &first, "c3", key->context[2],
mask->context[2]);
format_be32_masked(ds, &first, "c4", key->context[3],
mask->context[3]);
}
}
static void
format_odp_push_nsh_action(struct ds *ds,
const struct nsh_hdr *nsh_hdr)
{
size_t mdlen = nsh_hdr_len(nsh_hdr) - NSH_BASE_HDR_LEN;
uint32_t spi = ntohl(nsh_get_spi(nsh_hdr));
uint8_t si = nsh_get_si(nsh_hdr);
uint8_t flags = nsh_get_flags(nsh_hdr);
uint8_t ttl = nsh_get_ttl(nsh_hdr);
ds_put_cstr(ds, "push_nsh(");
ds_put_format(ds, "flags=%d", flags);
ds_put_format(ds, ",ttl=%d", ttl);
ds_put_format(ds, ",mdtype=%d", nsh_hdr->md_type);
ds_put_format(ds, ",np=%d", nsh_hdr->next_proto);
ds_put_format(ds, ",spi=0x%x", spi);
ds_put_format(ds, ",si=%d", si);
switch (nsh_hdr->md_type) {
case NSH_M_TYPE1: {
const struct nsh_md1_ctx *md1_ctx = &nsh_hdr->md1;
for (int i = 0; i < 4; i++) {
ds_put_format(ds, ",c%d=0x%x", i + 1,
ntohl(get_16aligned_be32(&md1_ctx->context[i])));
}
break;
}
case NSH_M_TYPE2: {
const struct nsh_md2_tlv *md2_ctx = &nsh_hdr->md2;
ds_put_cstr(ds, ",md2=");
ds_put_hex(ds, md2_ctx, mdlen);
break;
}
default:
ds_put_cstr(ds, ",<error: unknown mdtype>");
break;
}
ds_put_format(ds, ")");
}
static const char *
slow_path_reason_to_string(uint32_t reason)
{
switch ((enum slow_path_reason) reason) {
#define SPR(ENUM, STRING, EXPLANATION) case ENUM: return STRING;
SLOW_PATH_REASONS
#undef SPR
}
return NULL;
}
const char *
slow_path_reason_to_explanation(enum slow_path_reason reason)
{
switch (reason) {
#define SPR(ENUM, STRING, EXPLANATION) case ENUM: return EXPLANATION;
SLOW_PATH_REASONS
#undef SPR
}
return "<unknown>";
}
static int
parse_odp_flags(const char *s, const char *(*bit_to_string)(uint32_t),
uint32_t *res_flags, uint32_t allowed, uint32_t *res_mask)
{
return parse_flags(s, bit_to_string, ')', NULL, NULL,
res_flags, allowed, res_mask);
}
static void
format_odp_userspace_action(struct ds *ds, const struct nlattr *attr,
const struct hmap *portno_names)
{
static const struct nl_policy ovs_userspace_policy[] = {
[OVS_USERSPACE_ATTR_PID] = { .type = NL_A_U32 },
[OVS_USERSPACE_ATTR_USERDATA] = { .type = NL_A_UNSPEC,
.optional = true },
[OVS_USERSPACE_ATTR_EGRESS_TUN_PORT] = { .type = NL_A_U32,
.optional = true },
[OVS_USERSPACE_ATTR_ACTIONS] = { .type = NL_A_UNSPEC,
.optional = true },
};
struct nlattr *a[ARRAY_SIZE(ovs_userspace_policy)];
const struct nlattr *userdata_attr;
const struct nlattr *tunnel_out_port_attr;
if (!nl_parse_nested(attr, ovs_userspace_policy, a, ARRAY_SIZE(a))) {
ds_put_cstr(ds, "userspace(error)");
return;
}
ds_put_format(ds, "userspace(pid=%"PRIu32,
nl_attr_get_u32(a[OVS_USERSPACE_ATTR_PID]));
userdata_attr = a[OVS_USERSPACE_ATTR_USERDATA];
if (userdata_attr) {
const uint8_t *userdata = nl_attr_get(userdata_attr);
size_t userdata_len = nl_attr_get_size(userdata_attr);
bool userdata_unspec = true;
struct user_action_cookie cookie;
if (userdata_len == sizeof cookie) {
memcpy(&cookie, userdata, sizeof cookie);
userdata_unspec = false;
if (cookie.type == USER_ACTION_COOKIE_SFLOW) {
ds_put_format(ds, ",sFlow("
"vid=%"PRIu16",pcp=%d,output=%"PRIu32")",
vlan_tci_to_vid(cookie.sflow.vlan_tci),
vlan_tci_to_pcp(cookie.sflow.vlan_tci),
cookie.sflow.output);
} else if (cookie.type == USER_ACTION_COOKIE_SLOW_PATH) {
ds_put_cstr(ds, ",slow_path(");
format_flags(ds, slow_path_reason_to_string,
cookie.slow_path.reason, ',');
ds_put_format(ds, ")");
} else if (cookie.type == USER_ACTION_COOKIE_FLOW_SAMPLE) {
ds_put_format(ds, ",flow_sample(probability=%"PRIu16
",collector_set_id=%"PRIu32
",obs_domain_id=%"PRIu32
",obs_point_id=%"PRIu32
",output_port=",
cookie.flow_sample.probability,
cookie.flow_sample.collector_set_id,
cookie.flow_sample.obs_domain_id,
cookie.flow_sample.obs_point_id);
odp_portno_name_format(portno_names,
cookie.flow_sample.output_odp_port, ds);
if (cookie.flow_sample.direction == NX_ACTION_SAMPLE_INGRESS) {
ds_put_cstr(ds, ",ingress");
} else if (cookie.flow_sample.direction == NX_ACTION_SAMPLE_EGRESS) {
ds_put_cstr(ds, ",egress");
}
ds_put_char(ds, ')');
} else if (cookie.type == USER_ACTION_COOKIE_IPFIX) {
ds_put_format(ds, ",ipfix(output_port=");
odp_portno_name_format(portno_names,
cookie.ipfix.output_odp_port, ds);
ds_put_char(ds, ')');
} else if (cookie.type == USER_ACTION_COOKIE_CONTROLLER) {
ds_put_format(ds, ",controller(reason=%"PRIu16
",dont_send=%d"
",continuation=%d"
",recirc_id=%"PRIu32
",rule_cookie=%#"PRIx64
",controller_id=%"PRIu16
",max_len=%"PRIu16,
cookie.controller.reason,
!!cookie.controller.dont_send,
!!cookie.controller.continuation,
cookie.controller.recirc_id,
ntohll(get_32aligned_be64(
&cookie.controller.rule_cookie)),
cookie.controller.controller_id,
cookie.controller.max_len);
ds_put_char(ds, ')');
} else {
userdata_unspec = true;
}
}
if (userdata_unspec) {
size_t i;
ds_put_format(ds, ",userdata(");
for (i = 0; i < userdata_len; i++) {
ds_put_format(ds, "%02x", userdata[i]);
}
ds_put_char(ds, ')');
}
}
if (a[OVS_USERSPACE_ATTR_ACTIONS]) {
ds_put_cstr(ds, ",actions");
}
tunnel_out_port_attr = a[OVS_USERSPACE_ATTR_EGRESS_TUN_PORT];
if (tunnel_out_port_attr) {
ds_put_format(ds, ",tunnel_out_port=");
odp_portno_name_format(portno_names,
nl_attr_get_odp_port(tunnel_out_port_attr), ds);
}
ds_put_char(ds, ')');
}
static void
format_vlan_tci(struct ds *ds, ovs_be16 tci, ovs_be16 mask, bool verbose)
{
if (verbose || vlan_tci_to_vid(tci) || vlan_tci_to_vid(mask)) {
ds_put_format(ds, "vid=%"PRIu16, vlan_tci_to_vid(tci));
if (vlan_tci_to_vid(mask) != VLAN_VID_MASK) { /* Partially masked. */
ds_put_format(ds, "/0x%"PRIx16, vlan_tci_to_vid(mask));
};
ds_put_char(ds, ',');
}
if (verbose || vlan_tci_to_pcp(tci) || vlan_tci_to_pcp(mask)) {
ds_put_format(ds, "pcp=%d", vlan_tci_to_pcp(tci));
if (vlan_tci_to_pcp(mask) != (VLAN_PCP_MASK >> VLAN_PCP_SHIFT)) {
ds_put_format(ds, "/0x%x", vlan_tci_to_pcp(mask));
}
ds_put_char(ds, ',');
}
if (!(tci & htons(VLAN_CFI))) {
ds_put_cstr(ds, "cfi=0");
ds_put_char(ds, ',');
}
ds_chomp(ds, ',');
}
static void
format_mpls_lse(struct ds *ds, ovs_be32 mpls_lse)
{
ds_put_format(ds, "label=%"PRIu32",tc=%d,ttl=%d,bos=%d",
mpls_lse_to_label(mpls_lse),
mpls_lse_to_tc(mpls_lse),
mpls_lse_to_ttl(mpls_lse),
mpls_lse_to_bos(mpls_lse));
}
static void
format_mpls(struct ds *ds, const struct ovs_key_mpls *mpls_key,
const struct ovs_key_mpls *mpls_mask, int n)
{
for (int i = 0; i < n; i++) {
ovs_be32 key = mpls_key[i].mpls_lse;
if (mpls_mask == NULL) {
format_mpls_lse(ds, key);
} else {
ovs_be32 mask = mpls_mask[i].mpls_lse;
ds_put_format(ds, "label=%"PRIu32"/0x%x,tc=%d/%x,ttl=%d/0x%x,bos=%d/%x",
mpls_lse_to_label(key), mpls_lse_to_label(mask),
mpls_lse_to_tc(key), mpls_lse_to_tc(mask),
mpls_lse_to_ttl(key), mpls_lse_to_ttl(mask),
mpls_lse_to_bos(key), mpls_lse_to_bos(mask));
}
ds_put_char(ds, ',');
}
ds_chomp(ds, ',');
}
static void
format_odp_recirc_action(struct ds *ds, uint32_t recirc_id)
{
ds_put_format(ds, "recirc(%#"PRIx32")", recirc_id);
}
static void
format_odp_hash_action(struct ds *ds, const struct ovs_action_hash *hash_act)
{
ds_put_format(ds, "hash(");
if (hash_act->hash_alg == OVS_HASH_ALG_L4) {
ds_put_format(ds, "l4(%"PRIu32")", hash_act->hash_basis);
} else if (hash_act->hash_alg == OVS_HASH_ALG_SYM_L4) {
ds_put_format(ds, "sym_l4(%"PRIu32")", hash_act->hash_basis);
} else {
ds_put_format(ds, "Unknown hash algorithm(%"PRIu32")",
hash_act->hash_alg);
}
ds_put_format(ds, ")");
}
static const void *
format_udp_tnl_push_header(struct ds *ds, const struct udp_header *udp)
{
ds_put_format(ds, "udp(src=%"PRIu16",dst=%"PRIu16",csum=0x%"PRIx16"),",
ntohs(udp->udp_src), ntohs(udp->udp_dst),
ntohs(udp->udp_csum));
return udp + 1;
}
static void
format_odp_tnl_push_header(struct ds *ds, struct ovs_action_push_tnl *data)
{
const struct eth_header *eth;
const void *l3;
const void *l4;
const struct udp_header *udp;
eth = (const struct eth_header *)data->header;
l3 = eth + 1;
/* Ethernet */
ds_put_format(ds, "header(size=%"PRIu32",type=%"PRIu32",eth(dst=",
data->header_len, data->tnl_type);
ds_put_format(ds, ETH_ADDR_FMT, ETH_ADDR_ARGS(eth->eth_dst));
ds_put_format(ds, ",src=");
ds_put_format(ds, ETH_ADDR_FMT, ETH_ADDR_ARGS(eth->eth_src));
ds_put_format(ds, ",dl_type=0x%04"PRIx16"),", ntohs(eth->eth_type));
if (eth->eth_type == htons(ETH_TYPE_IP)) {
/* IPv4 */
const struct ip_header *ip = l3;
ds_put_format(ds, "ipv4(src="IP_FMT",dst="IP_FMT",proto=%"PRIu8
",tos=%#"PRIx8",ttl=%"PRIu8",frag=0x%"PRIx16"),",
IP_ARGS(get_16aligned_be32(&ip->ip_src)),
IP_ARGS(get_16aligned_be32(&ip->ip_dst)),
ip->ip_proto, ip->ip_tos,
ip->ip_ttl,
ntohs(ip->ip_frag_off));
l4 = (ip + 1);
} else {
const struct ovs_16aligned_ip6_hdr *ip6 = l3;
struct in6_addr src, dst;
memcpy(&src, &ip6->ip6_src, sizeof src);
memcpy(&dst, &ip6->ip6_dst, sizeof dst);
uint32_t ipv6_flow = ntohl(get_16aligned_be32(&ip6->ip6_flow));
ds_put_format(ds, "ipv6(src=");
ipv6_format_addr(&src, ds);
ds_put_format(ds, ",dst=");
ipv6_format_addr(&dst, ds);
ds_put_format(ds, ",label=%i,proto=%"PRIu8",tclass=0x%"PRIx32
",hlimit=%"PRIu8"),",
ipv6_flow & IPV6_LABEL_MASK, ip6->ip6_nxt,
(ipv6_flow >> 20) & 0xff, ip6->ip6_hlim);
l4 = (ip6 + 1);
}
udp = (const struct udp_header *) l4;
if (data->tnl_type == OVS_VPORT_TYPE_VXLAN) {
const struct vxlanhdr *vxh;
vxh = format_udp_tnl_push_header(ds, udp);
ds_put_format(ds, "vxlan(flags=0x%"PRIx32",vni=0x%"PRIx32")",
ntohl(get_16aligned_be32(&vxh->vx_flags)),
ntohl(get_16aligned_be32(&vxh->vx_vni)) >> 8);
} else if (data->tnl_type == OVS_VPORT_TYPE_GENEVE) {
const struct genevehdr *gnh;
gnh = format_udp_tnl_push_header(ds, udp);
ds_put_format(ds, "geneve(%s%svni=0x%"PRIx32,
gnh->oam ? "oam," : "",
gnh->critical ? "crit," : "",
ntohl(get_16aligned_be32(&gnh->vni)) >> 8);
if (gnh->opt_len) {
ds_put_cstr(ds, ",options(");
format_geneve_opts(gnh->options, NULL, gnh->opt_len * 4,
ds, false);
ds_put_char(ds, ')');
}
ds_put_char(ds, ')');
} else if (data->tnl_type == OVS_VPORT_TYPE_SRV6) {
const struct srv6_base_hdr *srh;
struct in6_addr *segs;
int nr_segs;
int i;
srh = (const struct srv6_base_hdr *) l4;
segs = ALIGNED_CAST(struct in6_addr *, srh + 1);
nr_segs = srh->last_entry + 1;
ds_put_format(ds, "srv6(");
ds_put_format(ds, "segments_left=%d", srh->rt_hdr.segments_left);
ds_put_format(ds, ",segs(");
for (i = 0; i < nr_segs; i++) {
ds_put_format(ds, i > 0 ? "," : "");
ipv6_format_addr(&segs[nr_segs - i - 1], ds);
}
ds_put_format(ds, "))");
} else if (data->tnl_type == OVS_VPORT_TYPE_GRE ||
data->tnl_type == OVS_VPORT_TYPE_IP6GRE) {
const struct gre_base_hdr *greh;
ovs_16aligned_be32 *options;
greh = (const struct gre_base_hdr *) l4;
ds_put_format(ds, "gre((flags=0x%"PRIx16",proto=0x%"PRIx16")",
ntohs(greh->flags), ntohs(greh->protocol));
options = (ovs_16aligned_be32 *)(greh + 1);
if (greh->flags & htons(GRE_CSUM)) {
ds_put_format(ds, ",csum=0x%"PRIx16, ntohs(*((ovs_be16 *)options)));
options++;
}
if (greh->flags & htons(GRE_KEY)) {
ds_put_format(ds, ",key=0x%"PRIx32, ntohl(get_16aligned_be32(options)));
options++;
}
if (greh->flags & htons(GRE_SEQ)) {
ds_put_format(ds, ",seq=0x%"PRIx32, ntohl(get_16aligned_be32(options)));
options++;
}
ds_put_format(ds, ")");
} else if (data->tnl_type == OVS_VPORT_TYPE_ERSPAN ||
data->tnl_type == OVS_VPORT_TYPE_IP6ERSPAN) {
const struct gre_base_hdr *greh;
const struct erspan_base_hdr *ersh;
greh = (const struct gre_base_hdr *) l4;
ersh = ERSPAN_HDR(greh);
if (ersh->ver == 1) {
ovs_16aligned_be32 *index = ALIGNED_CAST(ovs_16aligned_be32 *,
ersh + 1);
ds_put_format(ds, "erspan(ver=1,sid=0x%"PRIx16",idx=0x%"PRIx32")",
get_sid(ersh), ntohl(get_16aligned_be32(index)));
} else if (ersh->ver == 2) {
struct erspan_md2 *md2 = ALIGNED_CAST(struct erspan_md2 *,
ersh + 1);
ds_put_format(ds, "erspan(ver=2,sid=0x%"PRIx16
",dir=%"PRIu8",hwid=0x%"PRIx8")",
get_sid(ersh), md2->dir, get_hwid(md2));
} else {
VLOG_WARN("%s Invalid ERSPAN version %d\n", __func__, ersh->ver);
}
} else if (data->tnl_type == OVS_VPORT_TYPE_GTPU) {
const struct gtpuhdr *gtph;
gtph = format_udp_tnl_push_header(ds, udp);
ds_put_format(ds, "gtpu(flags=0x%"PRIx8
",msgtype=%"PRIu8",teid=0x%"PRIx32")",
gtph->md.flags, gtph->md.msgtype,
ntohl(get_16aligned_be32(&gtph->teid)));
}
ds_put_format(ds, ")");
}
static void
format_odp_tnl_push_action(struct ds *ds, const struct nlattr *attr,
const struct hmap *portno_names)
{
struct ovs_action_push_tnl *data;
data = (struct ovs_action_push_tnl *) nl_attr_get(attr);
ds_put_cstr(ds, "tnl_push(tnl_port(");
odp_portno_name_format(portno_names, data->tnl_port, ds);
ds_put_cstr(ds, "),");
format_odp_tnl_push_header(ds, data);
ds_put_format(ds, ",out_port(");
odp_portno_name_format(portno_names, data->out_port, ds);
ds_put_cstr(ds, "))");
}
static const struct nl_policy ovs_nat_policy[] = {
[OVS_NAT_ATTR_SRC] = { .type = NL_A_FLAG, .optional = true, },
[OVS_NAT_ATTR_DST] = { .type = NL_A_FLAG, .optional = true, },
[OVS_NAT_ATTR_IP_MIN] = { .type = NL_A_UNSPEC, .optional = true,
.min_len = sizeof(struct in_addr),
.max_len = sizeof(struct in6_addr)},
[OVS_NAT_ATTR_IP_MAX] = { .type = NL_A_UNSPEC, .optional = true,
.min_len = sizeof(struct in_addr),
.max_len = sizeof(struct in6_addr)},
[OVS_NAT_ATTR_PROTO_MIN] = { .type = NL_A_U16, .optional = true, },
[OVS_NAT_ATTR_PROTO_MAX] = { .type = NL_A_U16, .optional = true, },
[OVS_NAT_ATTR_PERSISTENT] = { .type = NL_A_FLAG, .optional = true, },
[OVS_NAT_ATTR_PROTO_HASH] = { .type = NL_A_FLAG, .optional = true, },
[OVS_NAT_ATTR_PROTO_RANDOM] = { .type = NL_A_FLAG, .optional = true, },
};
static void
format_odp_ct_nat(struct ds *ds, const struct nlattr *attr)
{
struct nlattr *a[ARRAY_SIZE(ovs_nat_policy)];
size_t addr_len;
ovs_be32 ip_min, ip_max;
struct in6_addr ip6_min, ip6_max;
uint16_t proto_min, proto_max;
if (!nl_parse_nested(attr, ovs_nat_policy, a, ARRAY_SIZE(a))) {
ds_put_cstr(ds, "nat(error: nl_parse_nested() failed.)");
return;
}
/* If no type, then nothing else either. */
if (!(a[OVS_NAT_ATTR_SRC] || a[OVS_NAT_ATTR_DST])
&& (a[OVS_NAT_ATTR_IP_MIN] || a[OVS_NAT_ATTR_IP_MAX]
|| a[OVS_NAT_ATTR_PROTO_MIN] || a[OVS_NAT_ATTR_PROTO_MAX]
|| a[OVS_NAT_ATTR_PERSISTENT] || a[OVS_NAT_ATTR_PROTO_HASH]
|| a[OVS_NAT_ATTR_PROTO_RANDOM])) {
ds_put_cstr(ds, "nat(error: options allowed only with \"src\" or \"dst\")");
return;
}
/* Both SNAT & DNAT may not be specified. */
if (a[OVS_NAT_ATTR_SRC] && a[OVS_NAT_ATTR_DST]) {
ds_put_cstr(ds, "nat(error: Only one of \"src\" or \"dst\" may be present.)");
return;
}
/* proto may not appear without ip. */
if (!a[OVS_NAT_ATTR_IP_MIN] && a[OVS_NAT_ATTR_PROTO_MIN]) {
ds_put_cstr(ds, "nat(error: proto but no IP.)");
return;
}
/* MAX may not appear without MIN. */
if ((!a[OVS_NAT_ATTR_IP_MIN] && a[OVS_NAT_ATTR_IP_MAX])
|| (!a[OVS_NAT_ATTR_PROTO_MIN] && a[OVS_NAT_ATTR_PROTO_MAX])) {
ds_put_cstr(ds, "nat(error: range max without min.)");
return;
}
/* Address sizes must match. */
if ((a[OVS_NAT_ATTR_IP_MIN]
&& (nl_attr_get_size(a[OVS_NAT_ATTR_IP_MIN]) != sizeof(ovs_be32) &&
nl_attr_get_size(a[OVS_NAT_ATTR_IP_MIN]) != sizeof(struct in6_addr)))
|| (a[OVS_NAT_ATTR_IP_MIN] && a[OVS_NAT_ATTR_IP_MAX]
&& (nl_attr_get_size(a[OVS_NAT_ATTR_IP_MIN])
!= nl_attr_get_size(a[OVS_NAT_ATTR_IP_MAX])))) {
ds_put_cstr(ds, "nat(error: IP address sizes do not match)");
return;
}
addr_len = a[OVS_NAT_ATTR_IP_MIN]
? nl_attr_get_size(a[OVS_NAT_ATTR_IP_MIN]) : 0;
ip_min = addr_len == sizeof(ovs_be32) && a[OVS_NAT_ATTR_IP_MIN]
? nl_attr_get_be32(a[OVS_NAT_ATTR_IP_MIN]) : 0;
ip_max = addr_len == sizeof(ovs_be32) && a[OVS_NAT_ATTR_IP_MAX]
? nl_attr_get_be32(a[OVS_NAT_ATTR_IP_MAX]) : 0;
if (addr_len == sizeof ip6_min) {
ip6_min = a[OVS_NAT_ATTR_IP_MIN]
? *(struct in6_addr *)nl_attr_get(a[OVS_NAT_ATTR_IP_MIN])
: in6addr_any;
ip6_max = a[OVS_NAT_ATTR_IP_MAX]
? *(struct in6_addr *)nl_attr_get(a[OVS_NAT_ATTR_IP_MAX])
: in6addr_any;
}
proto_min = a[OVS_NAT_ATTR_PROTO_MIN]
? nl_attr_get_u16(a[OVS_NAT_ATTR_PROTO_MIN]) : 0;
proto_max = a[OVS_NAT_ATTR_PROTO_MAX]
? nl_attr_get_u16(a[OVS_NAT_ATTR_PROTO_MAX]) : 0;
if ((addr_len == sizeof(ovs_be32)
&& ip_max && ntohl(ip_min) > ntohl(ip_max))
|| (addr_len == sizeof(struct in6_addr)
&& !ipv6_mask_is_any(&ip6_max)
&& memcmp(&ip6_min, &ip6_max, sizeof ip6_min) > 0)
|| (proto_max && proto_min > proto_max)) {
ds_put_cstr(ds, "nat(range error)");
return;
}
ds_put_cstr(ds, "nat");
if (a[OVS_NAT_ATTR_SRC] || a[OVS_NAT_ATTR_DST]) {
ds_put_char(ds, '(');
if (a[OVS_NAT_ATTR_SRC]) {
ds_put_cstr(ds, "src");
} else if (a[OVS_NAT_ATTR_DST]) {
ds_put_cstr(ds, "dst");
}
if (addr_len > 0) {
ds_put_cstr(ds, "=");
if (addr_len == sizeof ip_min) {
ds_put_format(ds, IP_FMT, IP_ARGS(ip_min));
if (ip_max && ip_max != ip_min) {
ds_put_format(ds, "-"IP_FMT, IP_ARGS(ip_max));
}
} else if (addr_len == sizeof ip6_min) {
ipv6_format_addr_bracket(&ip6_min, ds, proto_min);
if (!ipv6_mask_is_any(&ip6_max) &&
memcmp(&ip6_max, &ip6_min, sizeof ip6_max) != 0) {
ds_put_char(ds, '-');
ipv6_format_addr_bracket(&ip6_max, ds, proto_min);
}
}
if (proto_min) {
ds_put_format(ds, ":%"PRIu16, proto_min);
if (proto_max && proto_max != proto_min) {
ds_put_format(ds, "-%"PRIu16, proto_max);
}
}
}
ds_put_char(ds, ',');
if (a[OVS_NAT_ATTR_PERSISTENT]) {
ds_put_cstr(ds, "persistent,");
}
if (a[OVS_NAT_ATTR_PROTO_HASH]) {
ds_put_cstr(ds, "hash,");
}
if (a[OVS_NAT_ATTR_PROTO_RANDOM]) {
ds_put_cstr(ds, "random,");
}
ds_chomp(ds, ',');
ds_put_char(ds, ')');
}
}
static const struct nl_policy ovs_conntrack_policy[] = {
[OVS_CT_ATTR_COMMIT] = { .type = NL_A_FLAG, .optional = true, },
[OVS_CT_ATTR_FORCE_COMMIT] = { .type = NL_A_FLAG, .optional = true, },
[OVS_CT_ATTR_ZONE] = { .type = NL_A_U16, .optional = true, },
[OVS_CT_ATTR_MARK] = { .type = NL_A_UNSPEC, .optional = true,
.min_len = sizeof(uint32_t) * 2 },
[OVS_CT_ATTR_LABELS] = { .type = NL_A_UNSPEC, .optional = true,
.min_len = sizeof(struct ovs_key_ct_labels) * 2 },
[OVS_CT_ATTR_HELPER] = { .type = NL_A_STRING, .optional = true,
.min_len = 1, .max_len = 16 },
[OVS_CT_ATTR_NAT] = { .type = NL_A_UNSPEC, .optional = true },
[OVS_CT_ATTR_TIMEOUT] = { .type = NL_A_STRING, .optional = true,
.min_len = 1, .max_len = 32 },
};
static void
format_odp_conntrack_action(struct ds *ds, const struct nlattr *attr)
{
struct nlattr *a[ARRAY_SIZE(ovs_conntrack_policy)];
const struct {
ovs_32aligned_u128 value;
ovs_32aligned_u128 mask;
} *label;
const uint32_t *mark;
const char *helper, *timeout;
uint16_t zone;
bool commit, force;
const struct nlattr *nat;
if (!nl_parse_nested(attr, ovs_conntrack_policy, a, ARRAY_SIZE(a))) {
ds_put_cstr(ds, "ct(error)");
return;
}
commit = a[OVS_CT_ATTR_COMMIT] ? true : false;
force = a[OVS_CT_ATTR_FORCE_COMMIT] ? true : false;
zone = a[OVS_CT_ATTR_ZONE] ? nl_attr_get_u16(a[OVS_CT_ATTR_ZONE]) : 0;
mark = a[OVS_CT_ATTR_MARK] ? nl_attr_get(a[OVS_CT_ATTR_MARK]) : NULL;
label = a[OVS_CT_ATTR_LABELS] ? nl_attr_get(a[OVS_CT_ATTR_LABELS]): NULL;
helper = a[OVS_CT_ATTR_HELPER] ? nl_attr_get(a[OVS_CT_ATTR_HELPER]) : NULL;
timeout = a[OVS_CT_ATTR_TIMEOUT] ?
nl_attr_get(a[OVS_CT_ATTR_TIMEOUT]) : NULL;
nat = a[OVS_CT_ATTR_NAT];
ds_put_format(ds, "ct");
if (commit || force || zone || mark || label || helper || timeout || nat) {
ds_put_cstr(ds, "(");
if (commit) {
ds_put_format(ds, "commit,");
}
if (force) {
ds_put_format(ds, "force_commit,");
}
if (zone) {
ds_put_format(ds, "zone=%"PRIu16",", zone);
}
if (mark) {
ds_put_format(ds, "mark=%#"PRIx32"/%#"PRIx32",", *mark,
*(mark + 1));
}
if (label) {
ds_put_format(ds, "label=");
format_u128(ds, &label->value, &label->mask, true);
ds_put_char(ds, ',');
}
if (helper) {
ds_put_format(ds, "helper=%s,", helper);
}
if (timeout) {
ds_put_format(ds, "timeout=%s,", timeout);
}
if (nat) {
format_odp_ct_nat(ds, nat);
}
ds_chomp(ds, ',');
ds_put_cstr(ds, ")");
}
}
static const struct attr_len_tbl
ovs_nsh_key_attr_lens[OVS_NSH_KEY_ATTR_MAX + 1] = {
[OVS_NSH_KEY_ATTR_BASE] = { .len = 8 },
[OVS_NSH_KEY_ATTR_MD1] = { .len = 16 },
[OVS_NSH_KEY_ATTR_MD2] = { .len = ATTR_LEN_VARIABLE },
};
static void
format_odp_set_nsh(struct ds *ds, const struct nlattr *attr)
{
unsigned int left;
const struct nlattr *a;
struct ovs_key_nsh nsh;
struct ovs_key_nsh nsh_mask;
memset(&nsh, 0, sizeof nsh);
memset(&nsh_mask, 0xff, sizeof nsh_mask);
NL_NESTED_FOR_EACH (a, left, attr) {
enum ovs_nsh_key_attr type = nl_attr_type(a);
size_t len = nl_attr_get_size(a);
if (type > OVS_NSH_KEY_ATTR_MAX) {
return;
}
int expected_len = ovs_nsh_key_attr_lens[type].len;
if ((expected_len != ATTR_LEN_VARIABLE) && (len != 2 * expected_len)) {
return;
}
switch (type) {
case OVS_NSH_KEY_ATTR_UNSPEC:
break;
case OVS_NSH_KEY_ATTR_BASE: {
const struct ovs_nsh_key_base *base = nl_attr_get(a);
const struct ovs_nsh_key_base *base_mask = base + 1;
memcpy(&nsh, base, sizeof(*base));
memcpy(&nsh_mask, base_mask, sizeof(*base_mask));
break;
}
case OVS_NSH_KEY_ATTR_MD1: {
const struct ovs_nsh_key_md1 *md1 = nl_attr_get(a);
const struct ovs_nsh_key_md1 *md1_mask = md1 + 1;
memcpy(&nsh.context, &md1->context, sizeof(*md1));
memcpy(&nsh_mask.context, &md1_mask->context, sizeof(*md1_mask));
break;
}
case OVS_NSH_KEY_ATTR_MD2:
case __OVS_NSH_KEY_ATTR_MAX:
default:
/* No support for matching other metadata formats yet. */
break;
}
}
ds_put_cstr(ds, "set(nsh(");
format_nsh_key_mask(ds, &nsh, &nsh_mask);
ds_put_cstr(ds, "))");
}
static void
format_odp_check_pkt_len_action(struct ds *ds, const struct nlattr *attr,
const struct hmap *portno_names OVS_UNUSED)
{
static const struct nl_policy ovs_cpl_policy[] = {
[OVS_CHECK_PKT_LEN_ATTR_PKT_LEN] = { .type = NL_A_U16 },
[OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER] = { .type = NL_A_NESTED },
[OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL]
= { .type = NL_A_NESTED },
};
struct nlattr *a[ARRAY_SIZE(ovs_cpl_policy)];
ds_put_cstr(ds, "check_pkt_len");
if (!nl_parse_nested(attr, ovs_cpl_policy, a, ARRAY_SIZE(a))) {
ds_put_cstr(ds, "(error)");
return;
}
if (!a[OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER] ||
!a[OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL]) {
ds_put_cstr(ds, "(error)");
return;
}
uint16_t pkt_len = nl_attr_get_u16(a[OVS_CHECK_PKT_LEN_ATTR_PKT_LEN]);
ds_put_format(ds, "(size=%u,gt(", pkt_len);
const struct nlattr *acts;
acts = a[OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER];
format_odp_actions(ds, nl_attr_get(acts), nl_attr_get_size(acts),
portno_names);
ds_put_cstr(ds, "),le(");
acts = a[OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL];
format_odp_actions(ds, nl_attr_get(acts), nl_attr_get_size(acts),
portno_names);
ds_put_cstr(ds, "))");
}
static void
format_dec_ttl_action(struct ds *ds, const struct nlattr *attr,
const struct hmap *portno_names)
{
const struct nlattr *a;
unsigned int left;
ds_put_cstr(ds,"dec_ttl(le_1(");
NL_ATTR_FOR_EACH (a, left,
nl_attr_get(attr), nl_attr_get_size(attr)) {
if (nl_attr_type(a) == OVS_DEC_TTL_ATTR_ACTION) {
format_odp_actions(ds, nl_attr_get(a),
nl_attr_get_size(a), portno_names);
break;
}
}
ds_put_format(ds, "))");
}
static void
format_odp_psample_action(struct ds *ds, const struct nlattr *attr)
{
const struct nlattr *a;
unsigned int left;
ds_put_cstr(ds, "psample(");
NL_NESTED_FOR_EACH (a, left, attr) {
switch (a->nla_type) {
case OVS_PSAMPLE_ATTR_GROUP:
ds_put_format(ds, "group=%"PRIu32",", nl_attr_get_u32(a));
break;
case OVS_PSAMPLE_ATTR_COOKIE:
ds_put_cstr(ds, "cookie=");
ds_put_hex(ds, nl_attr_get(a), nl_attr_get_size(a));
break;
}
}
ds_chomp(ds, ',');
ds_put_char(ds, ')');
}
static void
format_odp_action(struct ds *ds, const struct nlattr *a,
const struct hmap *portno_names)
{
int expected_len;
enum ovs_action_attr type = nl_attr_type(a);
size_t size;
expected_len = odp_action_len(nl_attr_type(a));
if (expected_len != ATTR_LEN_VARIABLE &&
nl_attr_get_size(a) != expected_len) {
ds_put_format(ds, "bad length %"PRIuSIZE", expected %d for: ",
nl_attr_get_size(a), expected_len);
format_generic_odp_action(ds, a);
return;
}
switch (type) {
case OVS_ACTION_ATTR_METER:
ds_put_format(ds, "meter(%"PRIu32")", nl_attr_get_u32(a));
break;
case OVS_ACTION_ATTR_OUTPUT:
odp_portno_name_format(portno_names, nl_attr_get_odp_port(a), ds);
break;
case OVS_ACTION_ATTR_LB_OUTPUT:
ds_put_format(ds, "lb_output(%"PRIu32")", nl_attr_get_u32(a));
break;
case OVS_ACTION_ATTR_TRUNC: {
const struct ovs_action_trunc *trunc =
nl_attr_get_unspec(a, sizeof *trunc);
ds_put_format(ds, "trunc(%"PRIu32")", trunc->max_len);
break;
}
case OVS_ACTION_ATTR_TUNNEL_POP:
ds_put_cstr(ds, "tnl_pop(");
odp_portno_name_format(portno_names, nl_attr_get_odp_port(a), ds);
ds_put_char(ds, ')');
break;
case OVS_ACTION_ATTR_TUNNEL_PUSH:
format_odp_tnl_push_action(ds, a, portno_names);
break;
case OVS_ACTION_ATTR_USERSPACE:
format_odp_userspace_action(ds, a, portno_names);
break;
case OVS_ACTION_ATTR_RECIRC:
format_odp_recirc_action(ds, nl_attr_get_u32(a));
break;
case OVS_ACTION_ATTR_HASH:
format_odp_hash_action(ds, nl_attr_get(a));
break;
case OVS_ACTION_ATTR_SET_MASKED:
a = nl_attr_get(a);
/* OVS_KEY_ATTR_NSH is nested attribute, so it needs special process */
if (nl_attr_type(a) == OVS_KEY_ATTR_NSH) {
format_odp_set_nsh(ds, a);
break;
}
size = nl_attr_get_size(a) / 2;
ds_put_cstr(ds, "set(");
/* Masked set action not supported for tunnel key, which is bigger. */
if (size <= sizeof(struct ovs_key_ipv6)) {
struct nlattr attr[1 + DIV_ROUND_UP(sizeof(struct ovs_key_ipv6),
sizeof(struct nlattr))];
struct nlattr mask[1 + DIV_ROUND_UP(sizeof(struct ovs_key_ipv6),
sizeof(struct nlattr))];
mask->nla_type = attr->nla_type = nl_attr_type(a);
mask->nla_len = attr->nla_len = NLA_HDRLEN + size;
memcpy(attr + 1, (char *)(a + 1), size);
memcpy(mask + 1, (char *)(a + 1) + size, size);
format_odp_key_attr(attr, mask, NULL, ds, false);
} else {
format_odp_key_attr(a, NULL, NULL, ds, false);
}
ds_put_cstr(ds, ")");
break;
case OVS_ACTION_ATTR_SET:
ds_put_cstr(ds, "set(");
format_odp_key_attr(nl_attr_get(a), NULL, NULL, ds, true);
ds_put_cstr(ds, ")");
break;
case OVS_ACTION_ATTR_PUSH_ETH: {
const struct ovs_action_push_eth *eth = nl_attr_get(a);
ds_put_format(ds, "push_eth(src="ETH_ADDR_FMT",dst="ETH_ADDR_FMT")",
ETH_ADDR_ARGS(eth->addresses.eth_src),
ETH_ADDR_ARGS(eth->addresses.eth_dst));
break;
}
case OVS_ACTION_ATTR_POP_ETH:
ds_put_cstr(ds, "pop_eth");
break;
case OVS_ACTION_ATTR_PUSH_VLAN: {
const struct ovs_action_push_vlan *vlan = nl_attr_get(a);
ds_put_cstr(ds, "push_vlan(");
if (vlan->vlan_tpid != htons(ETH_TYPE_VLAN)) {
ds_put_format(ds, "tpid=0x%04"PRIx16",", ntohs(vlan->vlan_tpid));
}
format_vlan_tci(ds, vlan->vlan_tci, OVS_BE16_MAX, false);
ds_put_char(ds, ')');
break;
}
case OVS_ACTION_ATTR_POP_VLAN:
ds_put_cstr(ds, "pop_vlan");
break;
case OVS_ACTION_ATTR_PUSH_MPLS: {
const struct ovs_action_push_mpls *mpls = nl_attr_get(a);
ds_put_cstr(ds, "push_mpls(");
format_mpls_lse(ds, mpls->mpls_lse);
ds_put_format(ds, ",eth_type=0x%"PRIx16")", ntohs(mpls->mpls_ethertype));
break;
}
case OVS_ACTION_ATTR_POP_MPLS: {
ovs_be16 ethertype = nl_attr_get_be16(a);
ds_put_format(ds, "pop_mpls(eth_type=0x%"PRIx16")", ntohs(ethertype));
break;
}
case OVS_ACTION_ATTR_SAMPLE:
format_odp_sample_action(ds, a, portno_names);
break;
case OVS_ACTION_ATTR_CT:
format_odp_conntrack_action(ds, a);
break;
case OVS_ACTION_ATTR_CT_CLEAR:
ds_put_cstr(ds, "ct_clear");
break;
case OVS_ACTION_ATTR_CLONE:
format_odp_clone_action(ds, a, portno_names);
break;
case OVS_ACTION_ATTR_PUSH_NSH: {
uint32_t buffer[NSH_HDR_MAX_LEN / 4];
struct nsh_hdr *nsh_hdr = ALIGNED_CAST(struct nsh_hdr *, buffer);
nsh_reset_ver_flags_ttl_len(nsh_hdr);
odp_nsh_hdr_from_attr(nl_attr_get(a), nsh_hdr, NSH_HDR_MAX_LEN);
format_odp_push_nsh_action(ds, nsh_hdr);
break;
}
case OVS_ACTION_ATTR_POP_NSH:
ds_put_cstr(ds, "pop_nsh()");
break;
case OVS_ACTION_ATTR_CHECK_PKT_LEN:
format_odp_check_pkt_len_action(ds, a, portno_names);
break;
case OVS_ACTION_ATTR_ADD_MPLS: {
const struct ovs_action_add_mpls *mpls = nl_attr_get(a);
ds_put_cstr(ds, "add_mpls(");
format_mpls_lse(ds, mpls->mpls_lse);
ds_put_format(ds, ",eth_type=0x%"PRIx16")",
ntohs(mpls->mpls_ethertype));
break;
}
case OVS_ACTION_ATTR_DEC_TTL:
format_dec_ttl_action(ds, a, portno_names);
break;
case OVS_ACTION_ATTR_DROP:
ds_put_cstr(ds, "drop");
break;
case OVS_ACTION_ATTR_PSAMPLE:
format_odp_psample_action(ds, a);
break;
case OVS_ACTION_ATTR_UNSPEC:
case __OVS_ACTION_ATTR_MAX:
default:
format_generic_odp_action(ds, a);
break;
}
}
void
format_odp_actions(struct ds *ds, const struct nlattr *actions,
size_t actions_len, const struct hmap *portno_names)
{
if (actions_len) {
const struct nlattr *a;
unsigned int left;
NL_ATTR_FOR_EACH (a, left, actions, actions_len) {
if (a != actions) {
ds_put_char(ds, ',');
}
format_odp_action(ds, a, portno_names);
}
if (left) {
int i;
if (left == actions_len) {
ds_put_cstr(ds, "<empty>");
}
ds_put_format(ds, ",***%u leftover bytes*** (", left);
for (i = 0; i < left; i++) {
ds_put_format(ds, "%02x", ((const uint8_t *) a)[i]);
}
ds_put_char(ds, ')');
}
} else {
ds_put_cstr(ds, "drop");
}
}
/* Separate out parse_odp_userspace_action() function. */
static int
parse_odp_userspace_action(const char *s, struct ofpbuf *actions)
{
uint32_t pid;
struct user_action_cookie cookie;
struct ofpbuf buf;
odp_port_t tunnel_out_port;
int n = -1;
void *user_data = NULL;
size_t user_data_size = 0;
bool include_actions = false;
int res;
if (!ovs_scan(s, "userspace(pid=%"SCNi32"%n", &pid, &n)) {
return -EINVAL;
}
ofpbuf_init(&buf, 16);
memset(&cookie, 0, sizeof cookie);
user_data = &cookie;
user_data_size = sizeof cookie;
{
uint32_t output;
uint32_t probability;
uint32_t collector_set_id;
uint32_t obs_domain_id;
uint32_t obs_point_id;
/* USER_ACTION_COOKIE_CONTROLLER. */
uint8_t dont_send;
uint8_t continuation;
uint16_t reason;
uint32_t recirc_id;
uint64_t rule_cookie;
uint16_t controller_id;
uint16_t max_len;
int vid, pcp;
int n1 = -1;
if (ovs_scan(&s[n], ",sFlow(vid=%i,"
"pcp=%i,output=%"SCNi32")%n",
&vid, &pcp, &output, &n1)) {
uint16_t tci;
n += n1;
tci = vid | (pcp << VLAN_PCP_SHIFT);
if (tci) {
tci |= VLAN_CFI;
}
cookie.type = USER_ACTION_COOKIE_SFLOW;
cookie.ofp_in_port = OFPP_NONE;
cookie.ofproto_uuid = UUID_ZERO;
cookie.sflow.vlan_tci = htons(tci);
cookie.sflow.output = output;
} else if (ovs_scan(&s[n], ",slow_path(%n",
&n1)) {
n += n1;
cookie.type = USER_ACTION_COOKIE_SLOW_PATH;
cookie.ofp_in_port = OFPP_NONE;
cookie.ofproto_uuid = UUID_ZERO;
cookie.slow_path.reason = 0;
res = parse_odp_flags(&s[n], slow_path_reason_to_string,
&cookie.slow_path.reason,
SLOW_PATH_REASON_MASK, NULL);
if (res < 0 || s[n + res] != ')') {
goto out;
}
n += res + 1;
} else if (ovs_scan(&s[n], ",flow_sample(probability=%"SCNi32","
"collector_set_id=%"SCNi32","
"obs_domain_id=%"SCNi32","
"obs_point_id=%"SCNi32","
"output_port=%"SCNi32"%n",
&probability, &collector_set_id,
&obs_domain_id, &obs_point_id,
&output, &n1)) {
n += n1;
cookie.type = USER_ACTION_COOKIE_FLOW_SAMPLE;
cookie.ofp_in_port = OFPP_NONE;
cookie.ofproto_uuid = UUID_ZERO;
cookie.flow_sample.probability = probability;
cookie.flow_sample.collector_set_id = collector_set_id;
cookie.flow_sample.obs_domain_id = obs_domain_id;
cookie.flow_sample.obs_point_id = obs_point_id;
cookie.flow_sample.output_odp_port = u32_to_odp(output);
if (ovs_scan(&s[n], ",ingress%n", &n1)) {
cookie.flow_sample.direction = NX_ACTION_SAMPLE_INGRESS;
n += n1;
} else if (ovs_scan(&s[n], ",egress%n", &n1)) {
cookie.flow_sample.direction = NX_ACTION_SAMPLE_EGRESS;
n += n1;
} else {
cookie.flow_sample.direction = NX_ACTION_SAMPLE_DEFAULT;
}
if (s[n] != ')') {
res = -EINVAL;
goto out;
}
n++;
} else if (ovs_scan(&s[n], ",ipfix(output_port=%"SCNi32")%n",
&output, &n1) ) {
n += n1;
cookie.type = USER_ACTION_COOKIE_IPFIX;
cookie.ofp_in_port = OFPP_NONE;
cookie.ofproto_uuid = UUID_ZERO;
cookie.ipfix.output_odp_port = u32_to_odp(output);
} else if (ovs_scan(&s[n], ",controller(reason=%"SCNu16
",dont_send=%"SCNu8
",continuation=%"SCNu8
",recirc_id=%"SCNu32
",rule_cookie=%"SCNx64
",controller_id=%"SCNu16
",max_len=%"SCNu16")%n",
&reason, &dont_send, &continuation, &recirc_id,
&rule_cookie, &controller_id, &max_len, &n1)) {
n += n1;
cookie.type = USER_ACTION_COOKIE_CONTROLLER;
cookie.ofp_in_port = OFPP_NONE;
cookie.ofproto_uuid = UUID_ZERO;
cookie.controller.dont_send = dont_send ? true : false;
cookie.controller.continuation = continuation ? true : false;
cookie.controller.reason = reason;
cookie.controller.recirc_id = recirc_id;
put_32aligned_be64(&cookie.controller.rule_cookie,
htonll(rule_cookie));
cookie.controller.controller_id = controller_id;
cookie.controller.max_len = max_len;
} else if (ovs_scan(&s[n], ",userdata(%n", &n1)) {
char *end;
n += n1;
end = ofpbuf_put_hex(&buf, &s[n], NULL);
if (end[0] != ')') {
res = -EINVAL;
goto out;
}
user_data = buf.data;
user_data_size = buf.size;
n = (end + 1) - s;
}
}
{
int n1 = -1;
if (ovs_scan(&s[n], ",actions%n", &n1)) {
n += n1;
include_actions = true;
}
}
{
int n1 = -1;
if (ovs_scan(&s[n], ",tunnel_out_port=%"SCNi32")%n",
&tunnel_out_port, &n1)) {
res = odp_put_userspace_action(pid, user_data, user_data_size,
tunnel_out_port, include_actions,
actions, NULL);
if (!res) {
res = n + n1;
}
goto out;
} else if (s[n] == ')') {
res = odp_put_userspace_action(pid, user_data, user_data_size,
ODPP_NONE, include_actions,
actions, NULL);
if (!res) {
res = n + 1;
}
goto out;
}
}
{
struct ovs_action_push_eth push;
int eth_type = 0;
int n1 = -1;
if (ovs_scan(&s[n], "push_eth(src="ETH_ADDR_SCAN_FMT","
"dst="ETH_ADDR_SCAN_FMT",type=%i)%n",
ETH_ADDR_SCAN_ARGS(push.addresses.eth_src),
ETH_ADDR_SCAN_ARGS(push.addresses.eth_dst),
&eth_type, &n1)) {
nl_msg_put_unspec(actions, OVS_ACTION_ATTR_PUSH_ETH,
&push, sizeof push);
res = n + n1;
goto out;
}
}
if (!strncmp(&s[n], "pop_eth", 7)) {
nl_msg_put_flag(actions, OVS_ACTION_ATTR_POP_ETH);
res = 7;
goto out;
}
res = -EINVAL;
out:
ofpbuf_uninit(&buf);
return res;
}
static int
ovs_parse_tnl_push(const char *s, struct ovs_action_push_tnl *data)
{
struct eth_header *eth;
struct ip_header *ip;
struct ovs_16aligned_ip6_hdr *ip6;
struct udp_header *udp;
struct gre_base_hdr *greh;
struct erspan_base_hdr *ersh;
struct erspan_md2 *md2;
uint16_t gre_proto, gre_flags, dl_type, udp_src, udp_dst, udp_csum, sid;
ovs_be32 sip, dip;
uint32_t tnl_type = 0, header_len = 0, ip_len = 0, erspan_idx = 0;
void *l3, *l4;
int n = 0;
uint8_t hwid, dir;
uint32_t teid;
uint8_t gtpu_flags, gtpu_msgtype;
uint8_t segments_left;
if (!ovs_scan_len(s, &n, "tnl_push(tnl_port(%"SCNi32"),", &data->tnl_port)) {
return -EINVAL;
}
eth = (struct eth_header *) data->header;
l3 = (struct ip_header *) (eth + 1);
ip = (struct ip_header *) l3;
ip6 = (struct ovs_16aligned_ip6_hdr *) l3;
if (!ovs_scan_len(s, &n, "header(size=%"SCNi32",type=%"SCNi32","
"eth(dst="ETH_ADDR_SCAN_FMT",",
&data->header_len,
&data->tnl_type,
ETH_ADDR_SCAN_ARGS(eth->eth_dst))) {
return -EINVAL;
}
if (!ovs_scan_len(s, &n, "src="ETH_ADDR_SCAN_FMT",",
ETH_ADDR_SCAN_ARGS(eth->eth_src))) {
return -EINVAL;
}
if (!ovs_scan_len(s, &n, "dl_type=0x%"SCNx16"),", &dl_type)) {
return -EINVAL;
}
eth->eth_type = htons(dl_type);
if (eth->eth_type == htons(ETH_TYPE_IP)) {
/* IPv4 */
uint16_t ip_frag_off;
memset(ip, 0, sizeof(*ip));
if (!ovs_scan_len(s, &n, "ipv4(src="IP_SCAN_FMT",dst="IP_SCAN_FMT",proto=%"SCNi8
",tos=%"SCNi8",ttl=%"SCNi8",frag=0x%"SCNx16"),",
IP_SCAN_ARGS(&sip),
IP_SCAN_ARGS(&dip),
&ip->ip_proto, &ip->ip_tos,
&ip->ip_ttl, &ip_frag_off)) {
return -EINVAL;
}
put_16aligned_be32(&ip->ip_src, sip);
put_16aligned_be32(&ip->ip_dst, dip);
ip->ip_frag_off = htons(ip_frag_off);
ip->ip_ihl_ver = IP_IHL_VER(5, 4);
ip_len = sizeof *ip;
ip->ip_csum = csum(ip, ip_len);
} else {
char sip6_s[IPV6_SCAN_LEN + 1];
char dip6_s[IPV6_SCAN_LEN + 1];
struct in6_addr sip6, dip6;
uint8_t tclass;
uint32_t label;
if (!ovs_scan_len(s, &n, "ipv6(src="IPV6_SCAN_FMT",dst="IPV6_SCAN_FMT
",label=%i,proto=%"SCNi8",tclass=0x%"SCNx8
",hlimit=%"SCNi8"),",
sip6_s, dip6_s, &label, &ip6->ip6_nxt,
&tclass, &ip6->ip6_hlim)
|| (label & ~IPV6_LABEL_MASK) != 0
|| inet_pton(AF_INET6, sip6_s, &sip6) != 1
|| inet_pton(AF_INET6, dip6_s, &dip6) != 1) {
return -EINVAL;
}
put_16aligned_be32(&ip6->ip6_flow, htonl(6 << 28) |
htonl(tclass << 20) | htonl(label));
memcpy(&ip6->ip6_src, &sip6, sizeof(ip6->ip6_src));
memcpy(&ip6->ip6_dst, &dip6, sizeof(ip6->ip6_dst));
ip_len = sizeof *ip6;
}
/* Tunnel header */
l4 = ((uint8_t *) l3 + ip_len);
udp = (struct udp_header *) l4;
greh = (struct gre_base_hdr *) l4;
if (ovs_scan_len(s, &n, "udp(src=%"SCNi16",dst=%"SCNi16",csum=0x%"SCNx16"),",
&udp_src, &udp_dst, &udp_csum)) {
uint32_t vx_flags, vni;
udp->udp_src = htons(udp_src);
udp->udp_dst = htons(udp_dst);
udp->udp_len = 0;
udp->udp_csum = htons(udp_csum);
if (ovs_scan_len(s, &n, "vxlan(flags=0x%"SCNx32",vni=0x%"SCNx32"))",
&vx_flags, &vni)) {
struct vxlanhdr *vxh = (struct vxlanhdr *) (udp + 1);
put_16aligned_be32(&vxh->vx_flags, htonl(vx_flags));
put_16aligned_be32(&vxh->vx_vni, htonl(vni << 8));
tnl_type = OVS_VPORT_TYPE_VXLAN;
header_len = sizeof *eth + ip_len +
sizeof *udp + sizeof *vxh;
} else if (ovs_scan_len(s, &n, "geneve(")) {
struct genevehdr *gnh = (struct genevehdr *) (udp + 1);
memset(gnh, 0, sizeof *gnh);
header_len = sizeof *eth + ip_len +
sizeof *udp + sizeof *gnh;
if (ovs_scan_len(s, &n, "oam,")) {
gnh->oam = 1;
}
if (ovs_scan_len(s, &n, "crit,")) {
gnh->critical = 1;
}
if (!ovs_scan_len(s, &n, "vni=%"SCNi32, &vni)) {
return -EINVAL;
}
if (ovs_scan_len(s, &n, ",options(")) {
struct geneve_scan options;
int len;
memset(&options, 0, sizeof options);
len = scan_geneve(s + n, &options, NULL);
if (!len) {
return -EINVAL;
}
memcpy(gnh->options, options.d, options.len);
gnh->opt_len = options.len / 4;
header_len += options.len;
n += len;
}
if (!ovs_scan_len(s, &n, "))")) {
return -EINVAL;
}
gnh->proto_type = htons(ETH_TYPE_TEB);
put_16aligned_be32(&gnh->vni, htonl(vni << 8));
tnl_type = OVS_VPORT_TYPE_GENEVE;
} else {
return -EINVAL;
}
} else if (ovs_scan_len(s, &n, "gre((flags=0x%"SCNx16",proto=0x%"SCNx16")",
&gre_flags, &gre_proto)){
if (eth->eth_type == htons(ETH_TYPE_IP)) {
tnl_type = OVS_VPORT_TYPE_GRE;
} else {
tnl_type = OVS_VPORT_TYPE_IP6GRE;
}
greh->flags = htons(gre_flags);
greh->protocol = htons(gre_proto);
ovs_16aligned_be32 *options = (ovs_16aligned_be32 *) (greh + 1);
if (greh->flags & htons(GRE_CSUM)) {
uint16_t csum;
if (!ovs_scan_len(s, &n, ",csum=0x%"SCNx16, &csum)) {
return -EINVAL;
}
memset(options, 0, sizeof *options);
*((ovs_be16 *)options) = htons(csum);
options++;
}
if (greh->flags & htons(GRE_KEY)) {
uint32_t key;
if (!ovs_scan_len(s, &n, ",key=0x%"SCNx32, &key)) {
return -EINVAL;
}
put_16aligned_be32(options, htonl(key));
options++;
}
if (greh->flags & htons(GRE_SEQ)) {
uint32_t seq;
if (!ovs_scan_len(s, &n, ",seq=0x%"SCNx32, &seq)) {
return -EINVAL;
}
put_16aligned_be32(options, htonl(seq));
options++;
}
if (!ovs_scan_len(s, &n, "))")) {
return -EINVAL;
}
header_len = sizeof *eth + ip_len +
((uint8_t *) options - (uint8_t *) greh);
} else if (ovs_scan_len(s, &n, "erspan(ver=1,sid="SCNx16",idx=0x"SCNx32")",
&sid, &erspan_idx)) {
ersh = ERSPAN_HDR(greh);
ovs_16aligned_be32 *index = ALIGNED_CAST(ovs_16aligned_be32 *,
ersh + 1);
if (eth->eth_type == htons(ETH_TYPE_IP)) {
tnl_type = OVS_VPORT_TYPE_ERSPAN;
} else {
tnl_type = OVS_VPORT_TYPE_IP6ERSPAN;
}
greh->flags = htons(GRE_SEQ);
greh->protocol = htons(ETH_TYPE_ERSPAN1);
ersh->ver = 1;
set_sid(ersh, sid);
put_16aligned_be32(index, htonl(erspan_idx));
if (!ovs_scan_len(s, &n, ")")) {
return -EINVAL;
}
header_len = sizeof *eth + ip_len + ERSPAN_GREHDR_LEN +
sizeof *ersh + ERSPAN_V1_MDSIZE;
} else if (ovs_scan_len(s, &n, "erspan(ver=2,sid="SCNx16"dir="SCNu8
",hwid=0x"SCNx8")", &sid, &dir, &hwid)) {
ersh = ERSPAN_HDR(greh);
md2 = ALIGNED_CAST(struct erspan_md2 *, ersh + 1);
if (eth->eth_type == htons(ETH_TYPE_IP)) {
tnl_type = OVS_VPORT_TYPE_ERSPAN;
} else {
tnl_type = OVS_VPORT_TYPE_IP6ERSPAN;
}
greh->flags = htons(GRE_SEQ);
greh->protocol = htons(ETH_TYPE_ERSPAN2);
ersh->ver = 2;
set_sid(ersh, sid);
set_hwid(md2, hwid);
md2->dir = dir;
if (!ovs_scan_len(s, &n, ")")) {
return -EINVAL;
}
header_len = sizeof *eth + ip_len + ERSPAN_GREHDR_LEN +
sizeof *ersh + ERSPAN_V2_MDSIZE;
} else if (ovs_scan_len(s, &n, "gtpu(flags=%"SCNi8",msgtype=%"
SCNu8",teid=0x%"SCNx32"))",
&gtpu_flags, &gtpu_msgtype, &teid)) {
struct gtpuhdr *gtph = (struct gtpuhdr *) (udp + 1);
gtph->md.flags = gtpu_flags;
gtph->md.msgtype = gtpu_msgtype;
put_16aligned_be32(&gtph->teid, htonl(teid));
tnl_type = OVS_VPORT_TYPE_GTPU;
header_len = sizeof *eth + ip_len +
sizeof *udp + sizeof *gtph;
} else if (ovs_scan_len(s, &n, "srv6(segments_left=%"SCNu8,
&segments_left)) {
struct srv6_base_hdr *srh = (struct srv6_base_hdr *) (ip6 + 1);
union ovs_16aligned_in6_addr *segs;
char seg_s[IPV6_SCAN_LEN + 1];
struct in6_addr seg;
uint8_t n_segs = 0;
if (segments_left + 1 > SRV6_MAX_SEGS) {
return -EINVAL;
}
ip6->ip6_nxt = IPPROTO_ROUTING;
srh->rt_hdr.hdrlen = 2 * (segments_left + 1);
srh->rt_hdr.segments_left = segments_left;
srh->rt_hdr.type = IPV6_SRCRT_TYPE_4;
srh->last_entry = segments_left;
tnl_type = OVS_VPORT_TYPE_SRV6;
header_len = sizeof *eth + ip_len +
sizeof *srh + 8 * srh->rt_hdr.hdrlen;
/* Parse segment list. */
if (!ovs_scan_len(s, &n, ",segs(")) {
return -EINVAL;
}
segs = (union ovs_16aligned_in6_addr *) (srh + 1);
segs += segments_left;
while (ovs_scan_len(s, &n, IPV6_SCAN_FMT, seg_s)
&& inet_pton(AF_INET6, seg_s, &seg) == 1) {
if (n_segs == segments_left + 1) {
return -EINVAL;
}
memcpy(segs--, &seg, sizeof *segs);
n_segs++;
if (s[n] == ',') {
n++;
}
}
if (!ovs_scan_len(s, &n, ")))")) {
return -EINVAL;
}
if (n_segs != segments_left + 1) {
return -EINVAL;
}
} else {
return -EINVAL;
}
/* check tunnel meta data. */
if (data->tnl_type != tnl_type) {
return -EINVAL;
}
if (data->header_len != header_len) {
return -EINVAL;
}
/* Out port */
if (!ovs_scan_len(s, &n, ",out_port(%"SCNi32"))", &data->out_port)) {
return -EINVAL;
}
return n;
}
struct ct_nat_params {
bool snat;
bool dnat;
size_t addr_len;
union {
ovs_be32 ip;
struct in6_addr ip6;
} addr_min;
union {
ovs_be32 ip;
struct in6_addr ip6;
} addr_max;
uint16_t proto_min;
uint16_t proto_max;
bool persistent;
bool proto_hash;
bool proto_random;
};
static int
scan_ct_nat_range(const char *s, int *n, struct ct_nat_params *p)
{
if (ovs_scan_len(s, n, "=")) {
char ipv6_s[IPV6_SCAN_LEN + 1];
struct in6_addr ipv6;
if (ovs_scan_len(s, n, IP_SCAN_FMT, IP_SCAN_ARGS(&p->addr_min.ip))) {
p->addr_len = sizeof p->addr_min.ip;
if (ovs_scan_len(s, n, "-")) {
if (!ovs_scan_len(s, n, IP_SCAN_FMT,
IP_SCAN_ARGS(&p->addr_max.ip))) {
return -EINVAL;
}
}
} else if ((ovs_scan_len(s, n, IPV6_SCAN_FMT, ipv6_s)
|| ovs_scan_len(s, n, "["IPV6_SCAN_FMT"]", ipv6_s))
&& inet_pton(AF_INET6, ipv6_s, &ipv6) == 1) {
p->addr_len = sizeof p->addr_min.ip6;
p->addr_min.ip6 = ipv6;
if (ovs_scan_len(s, n, "-")) {
if ((ovs_scan_len(s, n, IPV6_SCAN_FMT, ipv6_s)
|| ovs_scan_len(s, n, "["IPV6_SCAN_FMT"]", ipv6_s))
&& inet_pton(AF_INET6, ipv6_s, &ipv6) == 1) {
p->addr_max.ip6 = ipv6;
} else {
return -EINVAL;
}
}
} else {
return -EINVAL;
}
if (ovs_scan_len(s, n, ":%"SCNu16, &p->proto_min)) {
if (ovs_scan_len(s, n, "-")) {
if (!ovs_scan_len(s, n, "%"SCNu16, &p->proto_max)) {
return -EINVAL;
}
}
}
}
return 0;
}
static int
scan_ct_nat(const char *s, struct ct_nat_params *p)
{
int n = 0;
if (ovs_scan_len(s, &n, "nat")) {
memset(p, 0, sizeof *p);
if (ovs_scan_len(s, &n, "(")) {
char *end;
int end_n;
end = strchr(s + n, ')');
if (!end) {
return -EINVAL;
}
end_n = end - s;
while (n < end_n) {
n += strspn(s + n, delimiters);
if (ovs_scan_len(s, &n, "src")) {
int err = scan_ct_nat_range(s, &n, p);
if (err) {
return err;
}
p->snat = true;
continue;
}
if (ovs_scan_len(s, &n, "dst")) {
int err = scan_ct_nat_range(s, &n, p);
if (err) {
return err;
}
p->dnat = true;
continue;
}
if (ovs_scan_len(s, &n, "persistent")) {
p->persistent = true;
continue;
}
if (ovs_scan_len(s, &n, "hash")) {
p->proto_hash = true;
continue;
}
if (ovs_scan_len(s, &n, "random")) {
p->proto_random = true;
continue;
}
return -EINVAL;
}
if (p->snat && p->dnat) {
return -EINVAL;
}
if ((p->addr_len != 0 &&
memcmp(&p->addr_max, &in6addr_any, p->addr_len) &&
memcmp(&p->addr_max, &p->addr_min, p->addr_len) < 0) ||
(p->proto_max && p->proto_max < p->proto_min)) {
return -EINVAL;
}
if (p->proto_hash && p->proto_random) {
return -EINVAL;
}
n++;
}
}
return n;
}
static void
nl_msg_put_ct_nat(struct ct_nat_params *p, struct ofpbuf *actions)
{
size_t start = nl_msg_start_nested(actions, OVS_CT_ATTR_NAT);
if (p->snat) {
nl_msg_put_flag(actions, OVS_NAT_ATTR_SRC);
} else if (p->dnat) {
nl_msg_put_flag(actions, OVS_NAT_ATTR_DST);
} else {
goto out;
}
if (p->addr_len != 0) {
nl_msg_put_unspec(actions, OVS_NAT_ATTR_IP_MIN, &p->addr_min,
p->addr_len);
if (memcmp(&p->addr_max, &p->addr_min, p->addr_len) > 0) {
nl_msg_put_unspec(actions, OVS_NAT_ATTR_IP_MAX, &p->addr_max,
p->addr_len);
}
if (p->proto_min) {
nl_msg_put_u16(actions, OVS_NAT_ATTR_PROTO_MIN, p->proto_min);
if (p->proto_max && p->proto_max > p->proto_min) {
nl_msg_put_u16(actions, OVS_NAT_ATTR_PROTO_MAX, p->proto_max);
}
}
if (p->persistent) {
nl_msg_put_flag(actions, OVS_NAT_ATTR_PERSISTENT);
}
if (p->proto_hash) {
nl_msg_put_flag(actions, OVS_NAT_ATTR_PROTO_HASH);
}
if (p->proto_random) {
nl_msg_put_flag(actions, OVS_NAT_ATTR_PROTO_RANDOM);
}
}
out:
nl_msg_end_nested(actions, start);
}
static int
parse_conntrack_action(const char *s_, struct ofpbuf *actions)
{
const char *s = s_;
if (ovs_scan(s, "ct")) {
const char *helper = NULL, *timeout = NULL;
size_t helper_len = 0, timeout_len = 0;
bool commit = false;
bool force_commit = false;
uint16_t zone = 0;
struct {
uint32_t value;
uint32_t mask;
} ct_mark = { 0, 0 };
struct {
ovs_u128 value;
ovs_u128 mask;
} ct_label;
struct ct_nat_params nat_params;
bool have_nat = false;
size_t start;
char *end;
memset(&ct_label, 0, sizeof(ct_label));
s += 2;
if (ovs_scan(s, "(")) {
s++;
find_end:
end = strchr(s, ')');
if (!end) {
return -EINVAL;
}
while (s != end) {
int n;
s += strspn(s, delimiters);
if (ovs_scan(s, "commit%n", &n)) {
commit = true;
s += n;
continue;
}
if (ovs_scan(s, "force_commit%n", &n)) {
force_commit = true;
s += n;
continue;
}
if (ovs_scan(s, "zone=%"SCNu16"%n", &zone, &n)) {
s += n;
continue;
}
if (ovs_scan(s, "mark=%"SCNx32"%n", &ct_mark.value, &n)) {
s += n;
n = -1;
if (ovs_scan(s, "/%"SCNx32"%n", &ct_mark.mask, &n)) {
s += n;
} else {
ct_mark.mask = UINT32_MAX;
}
continue;
}
if (ovs_scan(s, "label=%n", &n)) {
int retval;
s += n;
retval = scan_u128(s, &ct_label.value, &ct_label.mask);
if (retval == 0) {
return -EINVAL;
}
s += retval;
continue;
}
if (ovs_scan(s, "helper=%n", &n)) {
s += n;
helper_len = strcspn(s, delimiters_end);
if (!helper_len || helper_len > 15) {
return -EINVAL;
}
helper = s;
s += helper_len;
continue;
}
if (ovs_scan(s, "timeout=%n", &n)) {
s += n;
timeout_len = strcspn(s, delimiters_end);
if (!timeout_len || timeout_len > 31) {
return -EINVAL;
}
timeout = s;
s += timeout_len;
continue;
}
n = scan_ct_nat(s, &nat_params);
if (n > 0) {
s += n;
have_nat = true;
/* end points to the end of the nested, nat action.
* find the real end. */
goto find_end;
}
/* Nothing matched. */
return -EINVAL;
}
s++;
}
if (commit && force_commit) {
return -EINVAL;
}
start = nl_msg_start_nested(actions, OVS_ACTION_ATTR_CT);
if (commit) {
nl_msg_put_flag(actions, OVS_CT_ATTR_COMMIT);
} else if (force_commit) {
nl_msg_put_flag(actions, OVS_CT_ATTR_FORCE_COMMIT);
}
if (zone) {
nl_msg_put_u16(actions, OVS_CT_ATTR_ZONE, zone);
}
if (ct_mark.mask) {
nl_msg_put_unspec(actions, OVS_CT_ATTR_MARK, &ct_mark,
sizeof(ct_mark));
}
if (!ovs_u128_is_zero(ct_label.mask)) {
nl_msg_put_unspec(actions, OVS_CT_ATTR_LABELS, &ct_label,
sizeof ct_label);
}
if (helper) {
nl_msg_put_string__(actions, OVS_CT_ATTR_HELPER, helper,
helper_len);
}
if (timeout) {
nl_msg_put_string__(actions, OVS_CT_ATTR_TIMEOUT, timeout,
timeout_len);
}
if (have_nat) {
nl_msg_put_ct_nat(&nat_params, actions);
}
nl_msg_end_nested(actions, start);
}
return s - s_;
}
static void
nsh_key_to_attr(struct ofpbuf *buf, const struct ovs_key_nsh *nsh,
uint8_t * metadata, size_t md_size,
bool is_mask)
{
size_t nsh_key_ofs;
struct ovs_nsh_key_base base;
base.flags = nsh->flags;
base.ttl = nsh->ttl;
base.mdtype = nsh->mdtype;
base.np = nsh->np;
base.path_hdr = nsh->path_hdr;
nsh_key_ofs = nl_msg_start_nested(buf, OVS_KEY_ATTR_NSH);
nl_msg_put_unspec(buf, OVS_NSH_KEY_ATTR_BASE, &base, sizeof base);
if (is_mask) {
nl_msg_put_unspec(buf, OVS_NSH_KEY_ATTR_MD1, nsh->context,
sizeof nsh->context);
} else {
switch (nsh->mdtype) {
case NSH_M_TYPE1:
nl_msg_put_unspec(buf, OVS_NSH_KEY_ATTR_MD1, nsh->context,
sizeof nsh->context);
break;
case NSH_M_TYPE2:
if (metadata && md_size > 0) {
nl_msg_put_unspec(buf, OVS_NSH_KEY_ATTR_MD2, metadata,
md_size);
}
break;
default:
/* No match support for other MD formats yet. */
break;
}
}
nl_msg_end_nested(buf, nsh_key_ofs);
}
static int
parse_odp_push_nsh_action(const char *s, struct ofpbuf *actions)
{
int n = 0;
int ret = 0;
uint32_t spi = 0;
uint8_t si = 255;
uint32_t cd;
struct ovs_key_nsh nsh;
uint8_t metadata[NSH_CTX_HDRS_MAX_LEN];
uint8_t md_size = 0;
if (!ovs_scan_len(s, &n, "push_nsh(")) {
ret = -EINVAL;
goto out;
}
/* The default is NSH_M_TYPE1 */
nsh.flags = 0;
nsh.ttl = 63;
nsh.mdtype = NSH_M_TYPE1;
nsh.np = NSH_P_ETHERNET;
nsh.path_hdr = nsh_spi_si_to_path_hdr(0, 255);
memset(nsh.context, 0, NSH_M_TYPE1_MDLEN);
for (;;) {
n += strspn(s + n, delimiters);
if (s[n] == ')') {
break;
}
if (ovs_scan_len(s, &n, "flags=%"SCNi8, &nsh.flags)) {
continue;
}
if (ovs_scan_len(s, &n, "ttl=%"SCNi8, &nsh.ttl)) {
continue;
}
if (ovs_scan_len(s, &n, "mdtype=%"SCNi8, &nsh.mdtype)) {
switch (nsh.mdtype) {
case NSH_M_TYPE1:
/* This is the default format. */;
break;
case NSH_M_TYPE2:
/* Length will be updated later. */
md_size = 0;
break;
default:
ret = -EINVAL;
goto out;
}
continue;
}
if (ovs_scan_len(s, &n, "np=%"SCNi8, &nsh.np)) {
continue;
}
if (ovs_scan_len(s, &n, "spi=0x%"SCNx32, &spi)) {
continue;
}
if (ovs_scan_len(s, &n, "si=%"SCNi8, &si)) {
continue;
}
if (nsh.mdtype == NSH_M_TYPE1) {
if (ovs_scan_len(s, &n, "c1=0x%"SCNx32, &cd)) {
nsh.context[0] = htonl(cd);
continue;
}
if (ovs_scan_len(s, &n, "c2=0x%"SCNx32, &cd)) {
nsh.context[1] = htonl(cd);
continue;
}
if (ovs_scan_len(s, &n, "c3=0x%"SCNx32, &cd)) {
nsh.context[2] = htonl(cd);
continue;
}
if (ovs_scan_len(s, &n, "c4=0x%"SCNx32, &cd)) {
nsh.context[3] = htonl(cd);
continue;
}
}
else if (nsh.mdtype == NSH_M_TYPE2) {
struct ofpbuf b;
char buf[512];
size_t mdlen, padding;
if (ovs_scan_len(s, &n, "md2=0x%511[0-9a-fA-F]", buf)
&& n/2 <= sizeof metadata) {
ofpbuf_use_stub(&b, metadata, sizeof metadata);
ofpbuf_put_hex(&b, buf, &mdlen);
/* Pad metadata to 4 bytes. */
padding = PAD_SIZE(mdlen, 4);
if (padding > 0) {
ofpbuf_put_zeros(&b, padding);
}
md_size = mdlen + padding;
ofpbuf_uninit(&b);
continue;
}
}
ret = -EINVAL;
goto out;
}
out:
if (ret >= 0) {
nsh.path_hdr = nsh_spi_si_to_path_hdr(spi, si);
size_t offset = nl_msg_start_nested(actions, OVS_ACTION_ATTR_PUSH_NSH);
nsh_key_to_attr(actions, &nsh, metadata, md_size, false);
nl_msg_end_nested(actions, offset);
ret = n;
}
return ret;
}
static int
parse_odp_psample_action(const char *s, struct ofpbuf *actions)
{
char buf[2 * OVS_PSAMPLE_COOKIE_MAX_SIZE + 1];
uint8_t cookie[OVS_PSAMPLE_COOKIE_MAX_SIZE];
bool has_group = false;
size_t cookie_len = 0;
uint32_t group;
int n = 0;
if (!ovs_scan_len(s, &n, "psample(")) {
return -EINVAL;
}
while (s[n] != ')') {
n += strspn(s + n, delimiters);
if (!has_group && ovs_scan_len(s, &n, "group=%"SCNi32, &group)) {
has_group = true;
continue;
}
if (!cookie_len &&
ovs_scan_len(s, &n, "cookie=0x%32[0-9a-fA-F]", buf) && n > 7) {
struct ofpbuf b;
ofpbuf_use_stub(&b, cookie, OVS_PSAMPLE_COOKIE_MAX_SIZE);
ofpbuf_put_hex(&b, buf, &cookie_len);
ofpbuf_uninit(&b);
continue;
}
return -EINVAL;
}
n++;
if (!has_group) {
return -EINVAL;
}
odp_put_psample_action(actions, group, cookie_len ? cookie : NULL,
cookie_len);
return n;
}
static int
parse_action_list(struct parse_odp_context *context, const char *s,
struct ofpbuf *actions)
{
int n = 0;
for (;;) {
int retval;
n += strspn(s + n, delimiters);
if (s[n] == ')') {
break;
}
retval = parse_odp_action(context, s + n, actions);
if (retval < 0) {
return retval;
} else if (nl_attr_oversized(actions->size - NLA_HDRLEN)) {
return -E2BIG;
}
n += retval;
}
return n;
}
static int
parse_odp_action(struct parse_odp_context *context, const char *s,
struct ofpbuf *actions)
{
int retval;
context->depth++;
if (context->depth == MAX_ODP_NESTED) {
retval = -EINVAL;
} else {
retval = parse_odp_action__(context, s, actions);
}
context->depth--;
return retval;
}
static int
parse_odp_action__(struct parse_odp_context *context, const char *s,
struct ofpbuf *actions)
{
{
uint32_t port;
int n;
if (ovs_scan(s, "%"SCNi32"%n", &port, &n)) {
nl_msg_put_u32(actions, OVS_ACTION_ATTR_OUTPUT, port);
return n;
}
}
{
uint32_t bond_id;
int n;
if (ovs_scan(s, "lb_output(%"PRIu32")%n", &bond_id, &n)) {
nl_msg_put_u32(actions, OVS_ACTION_ATTR_LB_OUTPUT, bond_id);
return n;
}
}
{
uint32_t max_len;
int n;
if (ovs_scan(s, "trunc(%"SCNi32")%n", &max_len, &n)) {
struct ovs_action_trunc *trunc;
trunc = nl_msg_put_unspec_uninit(actions,
OVS_ACTION_ATTR_TRUNC, sizeof *trunc);
trunc->max_len = max_len;
return n;
}
}
if (context->port_names) {
int len = strcspn(s, delimiters);
struct simap_node *node;
node = simap_find_len(context->port_names, s, len);
if (node) {
nl_msg_put_u32(actions, OVS_ACTION_ATTR_OUTPUT, node->data);
return len;
}
}
{
uint32_t recirc_id;
int n = -1;
if (ovs_scan(s, "recirc(%"PRIu32")%n", &recirc_id, &n)) {
nl_msg_put_u32(actions, OVS_ACTION_ATTR_RECIRC, recirc_id);
return n;
}
}
if (!strncmp(s, "userspace(", 10)) {
return parse_odp_userspace_action(s, actions);
}
if (!strncmp(s, "set(", 4)) {
size_t start_ofs;
int retval;
struct nlattr mask[1024 / sizeof(struct nlattr)];
struct ofpbuf maskbuf = OFPBUF_STUB_INITIALIZER(mask);
struct nlattr *nested, *key;
size_t size;
start_ofs = nl_msg_start_nested(actions, OVS_ACTION_ATTR_SET);
retval = parse_odp_key_mask_attr(context, s + 4, actions, &maskbuf);
if (retval < 0) {
ofpbuf_uninit(&maskbuf);
return retval;
}
if (s[retval + 4] != ')') {
ofpbuf_uninit(&maskbuf);
return -EINVAL;
}
nested = ofpbuf_at_assert(actions, start_ofs, sizeof *nested);
key = nested + 1;
size = nl_attr_get_size(mask);
if (size == nl_attr_get_size(key)) {
/* Change to masked set action if not fully masked. */
if (!is_all_ones(mask + 1, size)) {
/* Remove padding of eariler key payload */
actions->size -= NLA_ALIGN(key->nla_len) - key->nla_len;
/* Put mask payload right after key payload */
key->nla_len += size;
ofpbuf_put(actions, mask + 1, size);
/* 'actions' may have been reallocated by ofpbuf_put(). */
nested = ofpbuf_at_assert(actions, start_ofs, sizeof *nested);
nested->nla_type = OVS_ACTION_ATTR_SET_MASKED;
key = nested + 1;
/* Add new padding as needed */
ofpbuf_put_zeros(actions, NLA_ALIGN(key->nla_len) -
key->nla_len);
}
}
ofpbuf_uninit(&maskbuf);
nl_msg_end_nested(actions, start_ofs);
return retval + 5;
}
{
struct ovs_action_push_vlan push;
int tpid = ETH_TYPE_VLAN;
int vid, pcp;
int cfi = 1;
int n = -1;
if (ovs_scan(s, "push_vlan(vid=%i,pcp=%i)%n", &vid, &pcp, &n)
|| ovs_scan(s, "push_vlan(vid=%i,pcp=%i,cfi=%i)%n",
&vid, &pcp, &cfi, &n)
|| ovs_scan(s, "push_vlan(tpid=%i,vid=%i,pcp=%i)%n",
&tpid, &vid, &pcp, &n)
|| ovs_scan(s, "push_vlan(tpid=%i,vid=%i,pcp=%i,cfi=%i)%n",
&tpid, &vid, &pcp, &cfi, &n)) {
if ((vid & ~(VLAN_VID_MASK >> VLAN_VID_SHIFT)) != 0
|| (pcp & ~(VLAN_PCP_MASK >> VLAN_PCP_SHIFT)) != 0) {
return -EINVAL;
}
push.vlan_tpid = htons(tpid);
push.vlan_tci = htons((vid << VLAN_VID_SHIFT)
| (pcp << VLAN_PCP_SHIFT)
| (cfi ? VLAN_CFI : 0));
nl_msg_put_unspec(actions, OVS_ACTION_ATTR_PUSH_VLAN,
&push, sizeof push);
return n;
}
}
if (!strncmp(s, "pop_vlan", 8)) {
nl_msg_put_flag(actions, OVS_ACTION_ATTR_POP_VLAN);
return 8;
}
{
unsigned long long int meter_id;
int n = -1;
if (sscanf(s, "meter(%lli)%n", &meter_id, &n) > 0 && n > 0) {
nl_msg_put_u32(actions, OVS_ACTION_ATTR_METER, meter_id);
return n;
}
}
{
double percentage;
int n = -1;
if (ovs_scan(s, "sample(sample=%lf%%,actions(%n", &percentage, &n)
&& percentage >= 0. && percentage <= 100.0) {
size_t sample_ofs, actions_ofs;
double probability;
probability = floor(UINT32_MAX * (percentage / 100.0) + .5);
sample_ofs = nl_msg_start_nested(actions, OVS_ACTION_ATTR_SAMPLE);
nl_msg_put_u32(actions, OVS_SAMPLE_ATTR_PROBABILITY,
(probability <= 0 ? 0
: probability >= UINT32_MAX ? UINT32_MAX
: probability));
actions_ofs = nl_msg_start_nested(actions,
OVS_SAMPLE_ATTR_ACTIONS);
int retval = parse_action_list(context, s + n, actions);
if (retval < 0) {
return retval;
}
n += retval;
nl_msg_end_nested(actions, actions_ofs);
nl_msg_end_nested(actions, sample_ofs);
return s[n + 1] == ')' ? n + 2 : -EINVAL;
}
}
{
if (!strncmp(s, "clone(", 6)) {
size_t actions_ofs;
int n = 6;
actions_ofs = nl_msg_start_nested(actions, OVS_ACTION_ATTR_CLONE);
int retval = parse_action_list(context, s + n, actions);
if (retval < 0) {
return retval;
}
n += retval;
nl_msg_end_nested(actions, actions_ofs);
return n + 1;
}
}
{
if (!strncmp(s, "push_nsh(", 9)) {
int retval = parse_odp_push_nsh_action(s, actions);
if (retval < 0) {
return retval;
}
return retval + 1;
}
}
{
int n;
if (ovs_scan(s, "pop_nsh()%n", &n)) {
nl_msg_put_flag(actions, OVS_ACTION_ATTR_POP_NSH);
return n;
}
}
{
uint32_t port;
int n;
if (ovs_scan(s, "tnl_pop(%"SCNi32")%n", &port, &n)) {
nl_msg_put_u32(actions, OVS_ACTION_ATTR_TUNNEL_POP, port);
return n;
}
}
{
if (!strncmp(s, "ct_clear", 8)) {
nl_msg_put_flag(actions, OVS_ACTION_ATTR_CT_CLEAR);
return 8;
}
}
{
uint16_t pkt_len;
int n = -1;
if (ovs_scan(s, "check_pkt_len(size=%"SCNi16",gt(%n", &pkt_len, &n)) {
size_t cpl_ofs, actions_ofs;
cpl_ofs = nl_msg_start_nested(actions,
OVS_ACTION_ATTR_CHECK_PKT_LEN);
nl_msg_put_u16(actions, OVS_CHECK_PKT_LEN_ATTR_PKT_LEN, pkt_len);
actions_ofs = nl_msg_start_nested(
actions, OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER);
int retval;
if (!strncasecmp(s + n, "drop", 4)) {
n += 4;
} else {
retval = parse_action_list(context, s + n, actions);
if (retval < 0) {
return retval;
}
n += retval;
}
nl_msg_end_nested(actions, actions_ofs);
retval = -1;
if (!ovs_scan(s + n, "),le(%n", &retval)) {
return -EINVAL;
}
n += retval;
actions_ofs = nl_msg_start_nested(
actions, OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL);
if (!strncasecmp(s + n, "drop", 4)) {
n += 4;
} else {
retval = parse_action_list(context, s + n, actions);
if (retval < 0) {
return retval;
}
n += retval;
}
nl_msg_end_nested(actions, actions_ofs);
nl_msg_end_nested(actions, cpl_ofs);
return s[n + 1] == ')' ? n + 2 : -EINVAL;
}
}
{
int retval;
retval = parse_conntrack_action(s, actions);
if (retval) {
return retval;
}
}
{
struct ovs_action_add_mpls mpls;
uint8_t ttl, tc, bos;
uint16_t eth_type;
uint32_t lse;
int n = -1;
if (ovs_scan(s, "add_mpls(label=%"SCNi32",tc=%"SCNd8",ttl=%"SCNd8","
"bos=%"SCNd8",eth_type=0x%"SCNx16")%n",
&lse, &tc, &ttl, &bos, &eth_type, &n)) {
mpls.mpls_ethertype = htons(eth_type);
mpls.mpls_lse = htonl((lse << MPLS_LABEL_SHIFT) |
(tc << MPLS_TC_SHIFT) |
(ttl << MPLS_TTL_SHIFT) |
(bos << MPLS_BOS_SHIFT));
mpls.tun_flags = 0;
nl_msg_put_unspec(actions, OVS_ACTION_ATTR_ADD_MPLS,
&mpls, sizeof mpls);
return n;
}
}
if (!strncmp(s, "psample(", 8)) {
return parse_odp_psample_action(s, actions);
}
{
struct ovs_action_push_tnl data;
int n;
n = ovs_parse_tnl_push(s, &data);
if (n > 0) {
odp_put_tnl_push_action(actions, &data);
return n;
} else if (n < 0) {
return n;
}
}
return -EINVAL;
}
/* Parses the string representation of datapath actions, in the format output
* by format_odp_action(). Returns 0 if successful, otherwise a positive errno
* value. On success, the ODP actions are appended to 'actions' as a series of
* Netlink attributes. On failure, no data is appended to 'actions'. Either
* way, 'actions''s data might be reallocated. */
int
odp_actions_from_string(const char *s, const struct simap *port_names,
struct ofpbuf *actions)
{
size_t old_size;
if (!strcasecmp(s, "drop")) {
nl_msg_put_u32(actions, OVS_ACTION_ATTR_DROP, XLATE_OK);
return 0;
}
struct parse_odp_context context = (struct parse_odp_context) {
.port_names = port_names,
};
old_size = actions->size;
for (;;) {
int retval;
s += strspn(s, delimiters);
if (!*s) {
return 0;
}
retval = parse_odp_action(&context, s, actions);
if (retval >= 0 && nl_attr_oversized(actions->size - NLA_HDRLEN)) {
retval = -E2BIG;
}
if (retval < 0 || !strchr(delimiters, s[retval])) {
actions->size = old_size;
return -retval;
}
s += retval;
}
return 0;
}
static const struct attr_len_tbl ovs_vxlan_ext_attr_lens[OVS_VXLAN_EXT_MAX + 1] = {
[OVS_VXLAN_EXT_GBP] = { .len = 4 },
};
static const struct attr_len_tbl ovs_tun_key_attr_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = {
[OVS_TUNNEL_KEY_ATTR_ID] = { .len = 8 },
[OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = { .len = 4 },
[OVS_TUNNEL_KEY_ATTR_IPV4_DST] = { .len = 4 },
[OVS_TUNNEL_KEY_ATTR_TOS] = { .len = 1 },
[OVS_TUNNEL_KEY_ATTR_TTL] = { .len = 1 },
[OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = { .len = 0 },
[OVS_TUNNEL_KEY_ATTR_CSUM] = { .len = 0 },
[OVS_TUNNEL_KEY_ATTR_TP_SRC] = { .len = 2 },
[OVS_TUNNEL_KEY_ATTR_TP_DST] = { .len = 2 },
[OVS_TUNNEL_KEY_ATTR_OAM] = { .len = 0 },
[OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS] = { .len = ATTR_LEN_VARIABLE },
[OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS] = { .len = ATTR_LEN_NESTED,
.next = ovs_vxlan_ext_attr_lens ,
.next_max = OVS_VXLAN_EXT_MAX},
[OVS_TUNNEL_KEY_ATTR_IPV6_SRC] = { .len = 16 },
[OVS_TUNNEL_KEY_ATTR_IPV6_DST] = { .len = 16 },
[OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS] = { .len = ATTR_LEN_VARIABLE },
[OVS_TUNNEL_KEY_ATTR_GTPU_OPTS] = { .len = ATTR_LEN_VARIABLE },
};
const struct attr_len_tbl ovs_flow_key_attr_lens[OVS_KEY_ATTR_MAX + 1] = {
[OVS_KEY_ATTR_ENCAP] = { .len = ATTR_LEN_NESTED },
[OVS_KEY_ATTR_PRIORITY] = { .len = 4 },
[OVS_KEY_ATTR_SKB_MARK] = { .len = 4 },
[OVS_KEY_ATTR_DP_HASH] = { .len = 4 },
[OVS_KEY_ATTR_RECIRC_ID] = { .len = 4 },
[OVS_KEY_ATTR_TUNNEL] = { .len = ATTR_LEN_NESTED,
.next = ovs_tun_key_attr_lens,
.next_max = OVS_TUNNEL_KEY_ATTR_MAX },
[OVS_KEY_ATTR_IN_PORT] = { .len = 4 },
[OVS_KEY_ATTR_ETHERNET] = { .len = sizeof(struct ovs_key_ethernet) },
[OVS_KEY_ATTR_VLAN] = { .len = 2 },
[OVS_KEY_ATTR_ETHERTYPE] = { .len = 2 },
[OVS_KEY_ATTR_MPLS] = { .len = ATTR_LEN_VARIABLE },
[OVS_KEY_ATTR_IPV4] = { .len = sizeof(struct ovs_key_ipv4) },
[OVS_KEY_ATTR_IPV6] = { .len = sizeof(struct ovs_key_ipv6) },
[OVS_KEY_ATTR_TCP] = { .len = sizeof(struct ovs_key_tcp) },
[OVS_KEY_ATTR_TCP_FLAGS] = { .len = 2 },
[OVS_KEY_ATTR_UDP] = { .len = sizeof(struct ovs_key_udp) },
[OVS_KEY_ATTR_SCTP] = { .len = sizeof(struct ovs_key_sctp) },
[OVS_KEY_ATTR_ICMP] = { .len = sizeof(struct ovs_key_icmp) },
[OVS_KEY_ATTR_ICMPV6] = { .len = sizeof(struct ovs_key_icmpv6) },
[OVS_KEY_ATTR_ARP] = { .len = sizeof(struct ovs_key_arp) },
[OVS_KEY_ATTR_ND] = { .len = sizeof(struct ovs_key_nd) },
[OVS_KEY_ATTR_ND_EXTENSIONS] = { .len = sizeof(struct ovs_key_nd_extensions) },
[OVS_KEY_ATTR_CT_STATE] = { .len = 4 },
[OVS_KEY_ATTR_CT_ZONE] = { .len = 2 },
[OVS_KEY_ATTR_CT_MARK] = { .len = 4 },
[OVS_KEY_ATTR_CT_LABELS] = { .len = sizeof(struct ovs_key_ct_labels) },
[OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4] = { .len = sizeof(struct ovs_key_ct_tuple_ipv4) },
[OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6] = { .len = sizeof(struct ovs_key_ct_tuple_ipv6) },
[OVS_KEY_ATTR_PACKET_TYPE] = { .len = 4 },
[OVS_KEY_ATTR_NSH] = { .len = ATTR_LEN_NESTED,
.next = ovs_nsh_key_attr_lens,
.next_max = OVS_NSH_KEY_ATTR_MAX },
};
/* Returns the correct length of the payload for a flow key attribute of the
* specified 'type', ATTR_LEN_INVALID if 'type' is unknown, ATTR_LEN_VARIABLE
* if the attribute's payload is variable length, or ATTR_LEN_NESTED if the
* payload is a nested type. */
static int
odp_key_attr_len(const struct attr_len_tbl tbl[], int max_type, uint16_t type)
{
if (type > max_type) {
return ATTR_LEN_INVALID;
}
return tbl[type].len;
}
static void
format_generic_odp_key(const struct nlattr *a, struct ds *ds)
{
size_t len = nl_attr_get_size(a);
if (len) {
const uint8_t *unspec;
unsigned int i;
unspec = nl_attr_get(a);
for (i = 0; i < len; i++) {
if (i) {
ds_put_char(ds, ' ');
}
ds_put_format(ds, "%02x", unspec[i]);
}
}
}
static const char *
ovs_frag_type_to_string(enum ovs_frag_type type)
{
switch (type) {
case OVS_FRAG_TYPE_NONE:
return "no";
case OVS_FRAG_TYPE_FIRST:
return "first";
case OVS_FRAG_TYPE_LATER:
return "later";
case __OVS_FRAG_TYPE_MAX:
default:
return "<error>";
}
}
enum odp_key_fitness
odp_nsh_hdr_from_attr(const struct nlattr *attr,
struct nsh_hdr *nsh_hdr, size_t size)
{
unsigned int left;
const struct nlattr *a;
bool unknown = false;
uint8_t flags = 0;
uint8_t ttl = 63;
size_t mdlen = 0;
bool has_md1 = false;
bool has_md2 = false;
memset(nsh_hdr, 0, size);
NL_NESTED_FOR_EACH (a, left, attr) {
uint16_t type = nl_attr_type(a);
size_t len = nl_attr_get_size(a);
int expected_len = odp_key_attr_len(ovs_nsh_key_attr_lens,
OVS_NSH_KEY_ATTR_MAX, type);
if (len != expected_len && expected_len >= 0) {
return ODP_FIT_ERROR;
}
switch (type) {
case OVS_NSH_KEY_ATTR_BASE: {
const struct ovs_nsh_key_base *base = nl_attr_get(a);
nsh_hdr->next_proto = base->np;
nsh_hdr->md_type = base->mdtype;
put_16aligned_be32(&nsh_hdr->path_hdr, base->path_hdr);
flags = base->flags;
ttl = base->ttl;
break;
}
case OVS_NSH_KEY_ATTR_MD1: {
const struct ovs_nsh_key_md1 *md1 = nl_attr_get(a);
struct nsh_md1_ctx *md1_dst = &nsh_hdr->md1;
has_md1 = true;
mdlen = nl_attr_get_size(a);
if ((mdlen + NSH_BASE_HDR_LEN != NSH_M_TYPE1_LEN) ||
(mdlen + NSH_BASE_HDR_LEN > size)) {
return ODP_FIT_ERROR;
}
memcpy(md1_dst, md1, mdlen);
break;
}
case OVS_NSH_KEY_ATTR_MD2: {
struct nsh_md2_tlv *md2_dst = &nsh_hdr->md2;
const uint8_t *md2 = nl_attr_get(a);
has_md2 = true;
mdlen = nl_attr_get_size(a);
if (mdlen + NSH_BASE_HDR_LEN > size) {
return ODP_FIT_ERROR;
}
memcpy(md2_dst, md2, mdlen);
break;
}
default:
/* Allow this to show up as unexpected, if there are unknown
* tunnel attribute, eventually resulting in ODP_FIT_TOO_MUCH. */
unknown = true;
break;
}
}
if (unknown) {
return ODP_FIT_TOO_MUCH;
}
if ((has_md1 && nsh_hdr->md_type != NSH_M_TYPE1)
|| (has_md2 && nsh_hdr->md_type != NSH_M_TYPE2)) {
return ODP_FIT_ERROR;
}
/* nsh header length = NSH_BASE_HDR_LEN + mdlen */
nsh_set_flags_ttl_len(nsh_hdr, flags, ttl, NSH_BASE_HDR_LEN + mdlen);
return ODP_FIT_PERFECT;
}
/* Reports the error 'msg', which is formatted as with printf().
*
* If 'errorp' is nonnull, then some the wants the error report to come
* directly back to it, so the function stores the error message into '*errorp'
* (after first freeing it in case there's something there already).
*
* Otherwise, logs the message at WARN level, rate-limited. */
static void OVS_PRINTF_FORMAT(3, 4)
odp_parse_error(struct vlog_rate_limit *rl, char **errorp,
const char *msg, ...)
{
if (OVS_UNLIKELY(errorp)) {
free(*errorp);
va_list args;
va_start(args, msg);
*errorp = xvasprintf(msg, args);
va_end(args);
} else if (!VLOG_DROP_WARN(rl)) {
va_list args;
va_start(args, msg);
char *error = xvasprintf(msg, args);
va_end(args);
VLOG_WARN("%s", error);
free(error);
}
}
/* Parses OVS_KEY_ATTR_NSH attribute 'attr' into 'nsh' and 'nsh_mask' and
* returns fitness. If the attribute is a key, 'is_mask' should be false;
* if it is a mask, 'is_mask' should be true. If 'errorp' is nonnull and the
* function returns ODP_FIT_ERROR, stores a malloc()'d error message in
* '*errorp'. */
static enum odp_key_fitness
odp_nsh_key_from_attr__(const struct nlattr *attr, bool is_mask,
struct ovs_key_nsh *nsh, struct ovs_key_nsh *nsh_mask,
char **errorp)
{
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
if (errorp) {
*errorp = NULL;
}
unsigned int left;
const struct nlattr *a;
bool unknown = false;
bool has_md1 = false;
NL_NESTED_FOR_EACH (a, left, attr) {
uint16_t type = nl_attr_type(a);
size_t len = nl_attr_get_size(a);
int expected_len = odp_key_attr_len(ovs_nsh_key_attr_lens,
OVS_NSH_KEY_ATTR_MAX, type);
if (expected_len) {
if (nsh_mask) {
expected_len *= 2;
}
if (len != expected_len) {
odp_parse_error(&rl, errorp, "NSH %s attribute %"PRIu16" "
"should have length %d but actually has "
"%"PRIuSIZE,
nsh_mask ? "mask" : "key",
type, expected_len, len);
return ODP_FIT_ERROR;
}
}
switch (type) {
case OVS_NSH_KEY_ATTR_UNSPEC:
break;
case OVS_NSH_KEY_ATTR_BASE: {
const struct ovs_nsh_key_base *base = nl_attr_get(a);
nsh->flags = base->flags;
nsh->ttl = base->ttl;
nsh->mdtype = base->mdtype;
nsh->np = base->np;
nsh->path_hdr = base->path_hdr;
if (nsh_mask && (len == 2 * sizeof(*base))) {
const struct ovs_nsh_key_base *base_mask = base + 1;
nsh_mask->flags = base_mask->flags;
nsh_mask->ttl = base_mask->ttl;
nsh_mask->mdtype = base_mask->mdtype;
nsh_mask->np = base_mask->np;
nsh_mask->path_hdr = base_mask->path_hdr;
}
break;
}
case OVS_NSH_KEY_ATTR_MD1: {
const struct ovs_nsh_key_md1 *md1 = nl_attr_get(a);
has_md1 = true;
memcpy(nsh->context, md1->context, sizeof md1->context);
if (nsh_mask && (len == 2 * sizeof *md1)) {
const struct ovs_nsh_key_md1 *md1_mask = md1 + 1;
memcpy(nsh_mask->context, md1_mask->context,
sizeof(*md1_mask));
}
break;
}
case OVS_NSH_KEY_ATTR_MD2:
default:
/* Allow this to show up as unexpected, if there are unknown
* tunnel attribute, eventually resulting in ODP_FIT_TOO_MUCH. */
unknown = true;
break;
}
}
if (unknown) {
return ODP_FIT_TOO_MUCH;
}
if (!is_mask && has_md1 && nsh->mdtype != NSH_M_TYPE1 && !nsh_mask) {
odp_parse_error(&rl, errorp, "OVS_NSH_KEY_ATTR_MD1 present but "
"declared mdtype %"PRIu8" is not %d (NSH_M_TYPE1)",
nsh->mdtype, NSH_M_TYPE1);
return ODP_FIT_ERROR;
}
return ODP_FIT_PERFECT;
}
/* Parses OVS_KEY_ATTR_NSH attribute 'attr' into 'nsh' and 'nsh_mask' and
* returns fitness. The attribute should be a key (not a mask). If 'errorp'
* is nonnull and the function returns ODP_FIT_ERROR, stores a malloc()'d error
* message in '*errorp'. */
enum odp_key_fitness
odp_nsh_key_from_attr(const struct nlattr *attr, struct ovs_key_nsh *nsh,
struct ovs_key_nsh *nsh_mask, char **errorp)
{
return odp_nsh_key_from_attr__(attr, false, nsh, nsh_mask, errorp);
}
/* Parses OVS_KEY_ATTR_TUNNEL attribute 'attr' into 'tun' and returns fitness.
* If the attribute is a key, 'is_mask' should be false; if it is a mask,
* 'is_mask' should be true. If 'errorp' is nonnull and the function returns
* ODP_FIT_ERROR, stores a malloc()'d error message in '*errorp'. */
static enum odp_key_fitness
odp_tun_key_from_attr__(const struct nlattr *attr, bool is_mask,
struct flow_tnl *tun, char **errorp)
{
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
unsigned int left;
const struct nlattr *a;
bool ttl = false;
bool unknown = false;
NL_NESTED_FOR_EACH(a, left, attr) {
uint16_t type = nl_attr_type(a);
size_t len = nl_attr_get_size(a);
int expected_len = odp_key_attr_len(ovs_tun_key_attr_lens,
OVS_TUNNEL_ATTR_MAX, type);
if (len != expected_len && expected_len >= 0) {
odp_parse_error(&rl, errorp, "tunnel key attribute %"PRIu16" "
"should have length %d but actually has %"PRIuSIZE,
type, expected_len, len);
return ODP_FIT_ERROR;
}
switch (type) {
case OVS_TUNNEL_KEY_ATTR_ID:
tun->tun_id = nl_attr_get_be64(a);
tun->flags |= FLOW_TNL_F_KEY;
break;
case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
tun->ip_src = nl_attr_get_be32(a);
break;
case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
tun->ip_dst = nl_attr_get_be32(a);
break;
case OVS_TUNNEL_KEY_ATTR_IPV6_SRC:
tun->ipv6_src = nl_attr_get_in6_addr(a);
break;
case OVS_TUNNEL_KEY_ATTR_IPV6_DST:
tun->ipv6_dst = nl_attr_get_in6_addr(a);
break;
case OVS_TUNNEL_KEY_ATTR_TOS:
tun->ip_tos = nl_attr_get_u8(a);
break;
case OVS_TUNNEL_KEY_ATTR_TTL:
tun->ip_ttl = nl_attr_get_u8(a);
ttl = true;
break;
case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
tun->flags |= FLOW_TNL_F_DONT_FRAGMENT;
break;
case OVS_TUNNEL_KEY_ATTR_CSUM:
tun->flags |= FLOW_TNL_F_CSUM;
break;
case OVS_TUNNEL_KEY_ATTR_TP_SRC:
tun->tp_src = nl_attr_get_be16(a);
break;
case OVS_TUNNEL_KEY_ATTR_TP_DST:
tun->tp_dst = nl_attr_get_be16(a);
break;
case OVS_TUNNEL_KEY_ATTR_OAM:
tun->flags |= FLOW_TNL_F_OAM;
break;
case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS: {
if (odp_vxlan_tun_opts_from_attr(a, &tun->gbp_id,
&tun->gbp_flags,
NULL)) {
odp_parse_error(&rl, errorp, "error parsing VXLAN options");
return ODP_FIT_ERROR;
}
break;
}
case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
tun_metadata_from_geneve_nlattr(a, is_mask, tun);
break;
case OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS: {
const struct erspan_metadata *opts = nl_attr_get(a);
tun->erspan_ver = opts->version;
if (tun->erspan_ver == 1) {
tun->erspan_idx = ntohl(opts->u.index);
} else if (tun->erspan_ver == 2) {
tun->erspan_dir = opts->u.md2.dir;
tun->erspan_hwid = get_hwid(&opts->u.md2);
} else {
VLOG_WARN("%s invalid erspan version\n", __func__);
}
break;
}
case OVS_TUNNEL_KEY_ATTR_GTPU_OPTS: {
const struct gtpu_metadata *opts = nl_attr_get(a);
tun->gtpu_flags = opts->flags;
tun->gtpu_msgtype = opts->msgtype;
break;
}
default:
/* Allow this to show up as unexpected, if there are unknown
* tunnel attribute, eventually resulting in ODP_FIT_TOO_MUCH. */
unknown = true;
break;
}
}
if (!ttl) {
odp_parse_error(&rl, errorp, "tunnel options missing TTL");
return ODP_FIT_ERROR;
}
if (unknown) {
return ODP_FIT_TOO_MUCH;
}
return ODP_FIT_PERFECT;
}
/* Parses OVS_KEY_ATTR_TUNNEL key attribute 'attr' into 'tun' and returns
* fitness. The attribute should be a key (not a mask). If 'errorp' is
* nonnull, stores NULL into '*errorp' on success, otherwise a malloc()'d error
* message. */
enum odp_key_fitness
odp_tun_key_from_attr(const struct nlattr *attr, struct flow_tnl *tun,
char **errorp)
{
if (errorp) {
*errorp = NULL;
}
memset(tun, 0, sizeof *tun);
return odp_tun_key_from_attr__(attr, false, tun, errorp);
}
static void
tun_key_to_attr(struct ofpbuf *a, const struct flow_tnl *tun_key,
const struct flow_tnl *tun_flow_key,
const struct ofpbuf *key_buf, const char *tnl_type)
{
size_t tun_key_ofs;
tun_key_ofs = nl_msg_start_nested(a, OVS_KEY_ATTR_TUNNEL);
/* tun_id != 0 without FLOW_TNL_F_KEY is valid if tun_key is a mask. */
if (tun_key->tun_id || tun_key->flags & FLOW_TNL_F_KEY) {
nl_msg_put_be64(a, OVS_TUNNEL_KEY_ATTR_ID, tun_key->tun_id);
}
if (tun_key->ip_src) {
nl_msg_put_be32(a, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, tun_key->ip_src);
}
if (tun_key->ip_dst) {
nl_msg_put_be32(a, OVS_TUNNEL_KEY_ATTR_IPV4_DST, tun_key->ip_dst);
}
if (ipv6_addr_is_set(&tun_key->ipv6_src)) {
nl_msg_put_in6_addr(a, OVS_TUNNEL_KEY_ATTR_IPV6_SRC, &tun_key->ipv6_src);
}
if (ipv6_addr_is_set(&tun_key->ipv6_dst)) {
nl_msg_put_in6_addr(a, OVS_TUNNEL_KEY_ATTR_IPV6_DST, &tun_key->ipv6_dst);
}
if (tun_key->ip_tos) {
nl_msg_put_u8(a, OVS_TUNNEL_KEY_ATTR_TOS, tun_key->ip_tos);
}
nl_msg_put_u8(a, OVS_TUNNEL_KEY_ATTR_TTL, tun_key->ip_ttl);
if (tun_key->flags & FLOW_TNL_F_DONT_FRAGMENT) {
nl_msg_put_flag(a, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT);
}
if (tun_key->flags & FLOW_TNL_F_CSUM) {
nl_msg_put_flag(a, OVS_TUNNEL_KEY_ATTR_CSUM);
}
if (tun_key->tp_src) {
nl_msg_put_be16(a, OVS_TUNNEL_KEY_ATTR_TP_SRC, tun_key->tp_src);
}
if (tun_key->tp_dst) {
nl_msg_put_be16(a, OVS_TUNNEL_KEY_ATTR_TP_DST, tun_key->tp_dst);
}
if (tun_key->flags & FLOW_TNL_F_OAM) {
nl_msg_put_flag(a, OVS_TUNNEL_KEY_ATTR_OAM);
}
/* If tnl_type is set to a particular type of output tunnel,
* only put its relevant tunnel metadata to the nlattr.
* If tnl_type is NULL, put tunnel metadata according to the
* 'tun_key'.
*/
if ((!tnl_type || !strcmp(tnl_type, "vxlan")) &&
(tun_key->gbp_flags || tun_key->gbp_id)) {
size_t vxlan_opts_ofs;
uint32_t gbp_raw;
vxlan_opts_ofs = nl_msg_start_nested(a, OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS);
gbp_raw = odp_encode_gbp_raw(tun_key->gbp_flags, tun_key->gbp_id);
nl_msg_put_u32(a, OVS_VXLAN_EXT_GBP, gbp_raw);
nl_msg_end_nested(a, vxlan_opts_ofs);
}
if (!tnl_type || !strcmp(tnl_type, "geneve")) {
tun_metadata_to_geneve_nlattr(tun_key, tun_flow_key, key_buf, a);
}
if ((!tnl_type || !strcmp(tnl_type, "erspan") ||
!strcmp(tnl_type, "ip6erspan")) &&
(tun_key->erspan_ver == 1 || tun_key->erspan_ver == 2)) {
struct erspan_metadata *opts;
opts = nl_msg_put_unspec_zero(a, OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS,
sizeof *opts);
opts->version = tun_key->erspan_ver;
if (opts->version == 1) {
opts->u.index = htonl(tun_key->erspan_idx);
} else {
opts->u.md2.dir = tun_key->erspan_dir;
set_hwid(&opts->u.md2, tun_key->erspan_hwid);
}
}
if ((!tnl_type || !strcmp(tnl_type, "gtpu")) &&
(tun_key->gtpu_flags && tun_key->gtpu_msgtype)) {
struct gtpu_metadata opts;
opts.flags = tun_key->gtpu_flags;
opts.msgtype = tun_key->gtpu_msgtype;
nl_msg_put_unspec(a, OVS_TUNNEL_KEY_ATTR_GTPU_OPTS,
&opts, sizeof(opts));
}
nl_msg_end_nested(a, tun_key_ofs);
}
static bool
odp_mask_is_constant__(enum ovs_key_attr attr, const void *mask, size_t size,
int constant)
{
/* Convert 'constant' to all the widths we need. C conversion rules ensure
* that -1 becomes all-1-bits and 0 does not change. */
ovs_be16 be16 = (OVS_FORCE ovs_be16) constant;
uint32_t u32 = constant;
uint8_t u8 = constant;
const struct in6_addr *in6 = constant ? &in6addr_exact : &in6addr_any;
switch (attr) {
case OVS_KEY_ATTR_UNSPEC:
case OVS_KEY_ATTR_ENCAP:
case OVS_KEY_ATTR_TUNNEL_INFO:
case __OVS_KEY_ATTR_MAX:
default:
return false;
case OVS_KEY_ATTR_PRIORITY:
case OVS_KEY_ATTR_IN_PORT:
case OVS_KEY_ATTR_ETHERNET:
case OVS_KEY_ATTR_VLAN:
case OVS_KEY_ATTR_ETHERTYPE:
case OVS_KEY_ATTR_IPV4:
case OVS_KEY_ATTR_TCP:
case OVS_KEY_ATTR_UDP:
case OVS_KEY_ATTR_ICMP:
case OVS_KEY_ATTR_ICMPV6:
case OVS_KEY_ATTR_ND:
case OVS_KEY_ATTR_ND_EXTENSIONS:
case OVS_KEY_ATTR_SKB_MARK:
case OVS_KEY_ATTR_TUNNEL:
case OVS_KEY_ATTR_SCTP:
case OVS_KEY_ATTR_DP_HASH:
case OVS_KEY_ATTR_RECIRC_ID:
case OVS_KEY_ATTR_MPLS:
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_PACKET_TYPE:
case OVS_KEY_ATTR_NSH:
return is_all_byte(mask, size, u8);
case OVS_KEY_ATTR_TCP_FLAGS:
return TCP_FLAGS(*(ovs_be16 *) mask) == TCP_FLAGS(be16);
case OVS_KEY_ATTR_IPV6: {
const struct ovs_key_ipv6 *ipv6_mask = mask;
return ((ipv6_mask->ipv6_label & htonl(IPV6_LABEL_MASK))
== htonl(IPV6_LABEL_MASK & u32)
&& ipv6_mask->ipv6_proto == u8
&& ipv6_mask->ipv6_tclass == u8
&& ipv6_mask->ipv6_hlimit == u8
&& ipv6_mask->ipv6_frag == u8
&& ipv6_addr_equals(&ipv6_mask->ipv6_src, in6)
&& ipv6_addr_equals(&ipv6_mask->ipv6_dst, in6));
}
case OVS_KEY_ATTR_ARP:
return is_all_byte(mask, OFFSETOFEND(struct ovs_key_arp, arp_tha), u8);
case OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4:
return is_all_byte(mask, OFFSETOFEND(struct ovs_key_ct_tuple_ipv4,
ipv4_proto), u8);
case OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6:
return is_all_byte(mask, OFFSETOFEND(struct ovs_key_ct_tuple_ipv6,
ipv6_proto), u8);
}
}
/* The caller must already have verified that 'ma' has a correct length.
*
* The main purpose of this function is formatting, to allow code to figure out
* whether the mask can be omitted. It doesn't try hard for attributes that
* contain sub-attributes, etc., because normally those would be broken down
* further for formatting. */
static bool
odp_mask_attr_is_wildcard(const struct nlattr *ma)
{
return odp_mask_is_constant__(nl_attr_type(ma),
nl_attr_get(ma), nl_attr_get_size(ma), 0);
}
/* The caller must already have verified that 'size' is a correct length for
* 'attr'.
*
* The main purpose of this function is formatting, to allow code to figure out
* whether the mask can be omitted. It doesn't try hard for attributes that
* contain sub-attributes, etc., because normally those would be broken down
* further for formatting. */
static bool
odp_mask_is_exact(enum ovs_key_attr attr, const void *mask, size_t size)
{
return odp_mask_is_constant__(attr, mask, size, -1);
}
/* The caller must already have verified that 'ma' has a correct length. */
static bool
odp_mask_attr_is_exact(const struct nlattr *ma)
{
enum ovs_key_attr attr = nl_attr_type(ma);
return odp_mask_is_exact(attr, nl_attr_get(ma), nl_attr_get_size(ma));
}
void
odp_portno_names_set(struct hmap *portno_names, odp_port_t port_no,
char *port_name)
{
struct odp_portno_names *odp_portno_names;
odp_portno_names = xmalloc(sizeof *odp_portno_names);
odp_portno_names->port_no = port_no;
odp_portno_names->name = xstrdup(port_name);
hmap_insert(portno_names, &odp_portno_names->hmap_node,
hash_odp_port(port_no));
}
static char *
odp_portno_names_get(const struct hmap *portno_names, odp_port_t port_no)
{
if (portno_names) {
struct odp_portno_names *odp_portno_names;
HMAP_FOR_EACH_IN_BUCKET (odp_portno_names, hmap_node,
hash_odp_port(port_no), portno_names) {
if (odp_portno_names->port_no == port_no) {
return odp_portno_names->name;
}
}
}
return NULL;
}
void
odp_portno_names_destroy(struct hmap *portno_names)
{
struct odp_portno_names *odp_portno_names;
HMAP_FOR_EACH_POP (odp_portno_names, hmap_node, portno_names) {
free(odp_portno_names->name);
free(odp_portno_names);
}
}
void
odp_portno_name_format(const struct hmap *portno_names, odp_port_t port_no,
struct ds *s)
{
const char *name = odp_portno_names_get(portno_names, port_no);
if (name) {
ds_put_cstr(s, name);
} else {
ds_put_format(s, "%"PRIu32, port_no);
}
}
/* Format helpers. */
static void
format_eth(struct ds *ds, const char *name, const struct eth_addr key,
const struct eth_addr *mask, bool verbose)
{
bool mask_empty = mask && eth_addr_is_zero(*mask);
if (verbose || !mask_empty) {
bool mask_full = !mask || eth_mask_is_exact(*mask);
if (mask_full) {
ds_put_format(ds, "%s="ETH_ADDR_FMT",", name, ETH_ADDR_ARGS(key));
} else {
ds_put_format(ds, "%s=", name);
eth_format_masked(key, mask, ds);
ds_put_char(ds, ',');
}
}
}
static void
format_be64(struct ds *ds, const char *name, ovs_be64 key,
const ovs_32aligned_be64 *mask_, bool verbose)
{
ovs_be64 mask = mask_ ? get_32aligned_be64(mask_) : htonll(0);
if (verbose || mask) {
bool mask_full = !mask_ || mask == OVS_BE64_MAX;
ds_put_format(ds, "%s=0x%"PRIx64, name, ntohll(key));
if (!mask_full) { /* Partially masked. */
ds_put_format(ds, "/%#"PRIx64, ntohll(mask));
}
ds_put_char(ds, ',');
}
}
static void
format_ipv4(struct ds *ds, const char *name, ovs_be32 key,
const ovs_be32 *mask, bool verbose)
{
bool mask_empty = mask && !*mask;
if (verbose || !mask_empty) {
bool mask_full = !mask || *mask == OVS_BE32_MAX;
ds_put_format(ds, "%s="IP_FMT, name, IP_ARGS(key));
if (!mask_full) { /* Partially masked. */
ds_put_format(ds, "/"IP_FMT, IP_ARGS(*mask));
}
ds_put_char(ds, ',');
}
}
static void
format_in6_addr(struct ds *ds, const char *name,
const struct in6_addr *key,
const struct in6_addr *mask,
bool verbose)
{
char buf[INET6_ADDRSTRLEN];
bool mask_empty = mask && ipv6_mask_is_any(mask);
if (verbose || !mask_empty) {
bool mask_full = !mask || ipv6_mask_is_exact(mask);
inet_ntop(AF_INET6, key, buf, sizeof buf);
ds_put_format(ds, "%s=%s", name, buf);
if (!mask_full) { /* Partially masked. */
inet_ntop(AF_INET6, mask, buf, sizeof buf);
ds_put_format(ds, "/%s", buf);
}
ds_put_char(ds, ',');
}
}
static void
format_ipv6_label(struct ds *ds, const char *name, ovs_be32 key,
const ovs_be32 *mask, bool verbose)
{
bool mask_empty = mask && !*mask;
if (verbose || !mask_empty) {
bool mask_full = !mask
|| (*mask & htonl(IPV6_LABEL_MASK)) == htonl(IPV6_LABEL_MASK);
ds_put_format(ds, "%s=%#"PRIx32, name, ntohl(key));
if (!mask_full) { /* Partially masked. */
ds_put_format(ds, "/%#"PRIx32, ntohl(*mask));
}
ds_put_char(ds, ',');
}
}
static void
format_u8x(struct ds *ds, const char *name, uint8_t key,
const uint8_t *mask, bool verbose)
{
bool mask_empty = mask && !*mask;
if (verbose || !mask_empty) {
bool mask_full = !mask || *mask == UINT8_MAX;
ds_put_format(ds, "%s=%#"PRIx8, name, key);
if (!mask_full) { /* Partially masked. */
ds_put_format(ds, "/%#"PRIx8, *mask);
}
ds_put_char(ds, ',');
}
}
static void
format_u8u(struct ds *ds, const char *name, uint8_t key,
const uint8_t *mask, bool verbose)
{
bool mask_empty = mask && !*mask;
if (verbose || !mask_empty) {
bool mask_full = !mask || *mask == UINT8_MAX;
ds_put_format(ds, "%s=%"PRIu8, name, key);
if (!mask_full) { /* Partially masked. */
ds_put_format(ds, "/%#"PRIx8, *mask);
}
ds_put_char(ds, ',');
}
}
static void
format_be16(struct ds *ds, const char *name, ovs_be16 key,
const ovs_be16 *mask, bool verbose)
{
bool mask_empty = mask && !*mask;
if (verbose || !mask_empty) {
bool mask_full = !mask || *mask == OVS_BE16_MAX;
ds_put_format(ds, "%s=%"PRIu16, name, ntohs(key));
if (!mask_full) { /* Partially masked. */
ds_put_format(ds, "/%#"PRIx16, ntohs(*mask));
}
ds_put_char(ds, ',');
}
}
static void
format_be16x(struct ds *ds, const char *name, ovs_be16 key,
const ovs_be16 *mask, bool verbose)
{
bool mask_empty = mask && !*mask;
if (verbose || !mask_empty) {
bool mask_full = !mask || *mask == OVS_BE16_MAX;
ds_put_format(ds, "%s=%#"PRIx16, name, ntohs(key));
if (!mask_full) { /* Partially masked. */
ds_put_format(ds, "/%#"PRIx16, ntohs(*mask));
}
ds_put_char(ds, ',');
}
}
static void
format_tun_flags(struct ds *ds, const char *name, uint16_t key,
const uint16_t *mask, bool verbose)
{
bool mask_empty = mask && !*mask;
if (verbose || !mask_empty) {
ds_put_cstr(ds, name);
ds_put_char(ds, '(');
if (mask) {
format_flags_masked(ds, NULL, flow_tun_flag_to_string, key,
*mask & FLOW_TNL_F_MASK, FLOW_TNL_F_MASK);
} else { /* Fully masked. */
format_flags(ds, flow_tun_flag_to_string, key, '|');
}
ds_put_cstr(ds, "),");
}
}
static bool
check_attr_len(struct ds *ds, const struct nlattr *a, const struct nlattr *ma,
const struct attr_len_tbl tbl[], int max_type, bool need_key)
{
uint16_t type = nl_attr_type(a);
int expected_len;
if (type > max_type) {
/* Unknown attribute, can't check the length. */
return true;
}
expected_len = odp_key_attr_len(tbl, max_type, type);
if (expected_len != ATTR_LEN_VARIABLE &&
expected_len != ATTR_LEN_NESTED) {
bool bad_key_len = nl_attr_get_size(a) != expected_len;
bool bad_mask_len = ma && nl_attr_get_size(ma) != expected_len;
if (bad_key_len || bad_mask_len) {
if (need_key) {
ds_put_format(ds, "key%u", type);
}
if (bad_key_len) {
ds_put_format(ds, "(bad key length %"PRIuSIZE", expected %d)(",
nl_attr_get_size(a), expected_len);
}
format_generic_odp_key(a, ds);
if (ma) {
ds_put_char(ds, '/');
if (bad_mask_len) {
ds_put_format(ds, "(bad mask length %"PRIuSIZE", expected %d)(",
nl_attr_get_size(ma), expected_len);
}
format_generic_odp_key(ma, ds);
}
ds_put_char(ds, ')');
return false;
}
}
return true;
}
static void
format_unknown_key(struct ds *ds, const struct nlattr *a,
const struct nlattr *ma)
{
ds_put_format(ds, "key%u(", nl_attr_type(a));
format_generic_odp_key(a, ds);
if (ma && !odp_mask_attr_is_exact(ma)) {
ds_put_char(ds, '/');
format_generic_odp_key(ma, ds);
}
ds_put_cstr(ds, "),");
}
static void
format_odp_tun_vxlan_opt(const struct nlattr *attr,
const struct nlattr *mask_attr, struct ds *ds,
bool verbose)
{
unsigned int left;
const struct nlattr *a;
struct ofpbuf ofp;
ofpbuf_init(&ofp, 100);
NL_NESTED_FOR_EACH(a, left, attr) {
uint16_t type = nl_attr_type(a);
const struct nlattr *ma = NULL;
if (mask_attr) {
ma = nl_attr_find__(nl_attr_get(mask_attr),
nl_attr_get_size(mask_attr), type);
if (!ma) {
ma = generate_all_wildcard_mask(ovs_vxlan_ext_attr_lens,
OVS_VXLAN_EXT_MAX,
&ofp, a);
}
}
if (!check_attr_len(ds, a, ma, ovs_vxlan_ext_attr_lens,
OVS_VXLAN_EXT_MAX, true)) {
continue;
}
switch (type) {
case OVS_VXLAN_EXT_GBP: {
uint32_t key = nl_attr_get_u32(a);
ovs_be16 id, id_mask;
uint8_t flags, flags_mask = 0;
odp_decode_gbp_raw(key, &id, &flags);
if (ma) {
uint32_t mask = nl_attr_get_u32(ma);
odp_decode_gbp_raw(mask, &id_mask, &flags_mask);
}
ds_put_cstr(ds, "gbp(");
format_be16(ds, "id", id, ma ? &id_mask : NULL, verbose);
format_u8x(ds, "flags", flags, ma ? &flags_mask : NULL, verbose);
ds_chomp(ds, ',');
ds_put_cstr(ds, "),");
break;
}
default:
format_unknown_key(ds, a, ma);
}
ofpbuf_clear(&ofp);
}
ds_chomp(ds, ',');
ofpbuf_uninit(&ofp);
}
static void
format_odp_tun_erspan_opt(const struct nlattr *attr,
const struct nlattr *mask_attr, struct ds *ds,
bool verbose)
{
const struct erspan_metadata *opts, *mask;
uint8_t ver, ver_ma, dir, dir_ma, hwid, hwid_ma;
opts = nl_attr_get(attr);
mask = mask_attr ? nl_attr_get(mask_attr) : NULL;
ver = (uint8_t)opts->version;
if (mask) {
ver_ma = (uint8_t)mask->version;
}
format_u8u(ds, "ver", ver, mask ? &ver_ma : NULL, verbose);
if (opts->version == 1) {
if (mask) {
ds_put_format(ds, "idx=%#"PRIx32"/%#"PRIx32",",
ntohl(opts->u.index),
ntohl(mask->u.index));
} else {
ds_put_format(ds, "idx=%#"PRIx32",", ntohl(opts->u.index));
}
} else if (opts->version == 2) {
dir = opts->u.md2.dir;
hwid = opts->u.md2.hwid;
if (mask) {
dir_ma = mask->u.md2.dir;
hwid_ma = mask->u.md2.hwid;
}
format_u8u(ds, "dir", dir, mask ? &dir_ma : NULL, verbose);
format_u8x(ds, "hwid", hwid, mask ? &hwid_ma : NULL, verbose);
}
ds_chomp(ds, ',');
}
static void
format_odp_tun_gtpu_opt(const struct nlattr *attr,
const struct nlattr *mask_attr, struct ds *ds,
bool verbose)
{
const struct gtpu_metadata *opts, *mask;
opts = nl_attr_get(attr);
mask = mask_attr ? nl_attr_get(mask_attr) : NULL;
format_u8x(ds, "flags", opts->flags, mask ? &mask->flags : NULL, verbose);
format_u8u(ds, "msgtype", opts->msgtype, mask ? &mask->msgtype : NULL,
verbose);
ds_chomp(ds, ',');
}
#define MASK(PTR, FIELD) PTR ? &PTR->FIELD : NULL
static void
format_geneve_opts(const struct geneve_opt *opt,
const struct geneve_opt *mask, int opts_len,
struct ds *ds, bool verbose)
{
while (opts_len > 0) {
unsigned int len;
uint8_t data_len, data_len_mask;
if (opts_len < sizeof *opt) {
ds_put_format(ds, "opt len %u less than minimum %"PRIuSIZE,
opts_len, sizeof *opt);
return;
}
data_len = opt->length * 4;
if (mask) {
if (mask->length == 0x1f) {
data_len_mask = UINT8_MAX;
} else {
data_len_mask = mask->length;
}
}
len = sizeof *opt + data_len;
if (len > opts_len) {
ds_put_format(ds, "opt len %u greater than remaining %u",
len, opts_len);
return;
}
ds_put_char(ds, '{');
format_be16x(ds, "class", opt->opt_class, MASK(mask, opt_class),
verbose);
format_u8x(ds, "type", opt->type, MASK(mask, type), verbose);
format_u8u(ds, "len", data_len, mask ? &data_len_mask : NULL, verbose);
if (data_len &&
(verbose || !mask || !is_all_zeros(mask + 1, data_len))) {
ds_put_hex(ds, opt + 1, data_len);
if (mask && !is_all_ones(mask + 1, data_len)) {
ds_put_char(ds, '/');
ds_put_hex(ds, mask + 1, data_len);
}
} else {
ds_chomp(ds, ',');
}
ds_put_char(ds, '}');
opt += len / sizeof(*opt);
if (mask) {
mask += len / sizeof(*opt);
}
opts_len -= len;
};
}
static void
format_odp_tun_geneve(const struct nlattr *attr,
const struct nlattr *mask_attr, struct ds *ds,
bool verbose)
{
int opts_len = nl_attr_get_size(attr);
const struct geneve_opt *opt = nl_attr_get(attr);
const struct geneve_opt *mask = mask_attr ?
nl_attr_get(mask_attr) : NULL;
if (mask && nl_attr_get_size(attr) != nl_attr_get_size(mask_attr)) {
ds_put_format(ds, "value len %"PRIuSIZE" different from mask len %"PRIuSIZE,
nl_attr_get_size(attr), nl_attr_get_size(mask_attr));
return;
}
format_geneve_opts(opt, mask, opts_len, ds, verbose);
}
static void
format_odp_nsh_attr(const struct nlattr *attr, const struct nlattr *mask_attr,
struct ds *ds)
{
unsigned int left;
const struct nlattr *a;
struct ovs_key_nsh nsh;
struct ovs_key_nsh nsh_mask;
memset(&nsh, 0, sizeof nsh);
memset(&nsh_mask, 0xff, sizeof nsh_mask);
NL_NESTED_FOR_EACH (a, left, attr) {
enum ovs_nsh_key_attr type = nl_attr_type(a);
const struct nlattr *ma = NULL;
if (mask_attr) {
ma = nl_attr_find__(nl_attr_get(mask_attr),
nl_attr_get_size(mask_attr), type);
}
if (!check_attr_len(ds, a, ma, ovs_nsh_key_attr_lens,
OVS_NSH_KEY_ATTR_MAX, true)) {
continue;
}
switch (type) {
case OVS_NSH_KEY_ATTR_UNSPEC:
break;
case OVS_NSH_KEY_ATTR_BASE: {
const struct ovs_nsh_key_base *base = nl_attr_get(a);
const struct ovs_nsh_key_base *base_mask
= ma ? nl_attr_get(ma) : NULL;
nsh.flags = base->flags;
nsh.ttl = base->ttl;
nsh.mdtype = base->mdtype;
nsh.np = base->np;
nsh.path_hdr = base->path_hdr;
if (base_mask) {
nsh_mask.flags = base_mask->flags;
nsh_mask.ttl = base_mask->ttl;
nsh_mask.mdtype = base_mask->mdtype;
nsh_mask.np = base_mask->np;
nsh_mask.path_hdr = base_mask->path_hdr;
}
break;
}
case OVS_NSH_KEY_ATTR_MD1: {
const struct ovs_nsh_key_md1 *md1 = nl_attr_get(a);
const struct ovs_nsh_key_md1 *md1_mask
= ma ? nl_attr_get(ma) : NULL;
memcpy(nsh.context, md1->context, sizeof md1->context);
if (md1_mask) {
memcpy(nsh_mask.context, md1_mask->context,
sizeof md1_mask->context);
}
break;
}
case OVS_NSH_KEY_ATTR_MD2:
case __OVS_NSH_KEY_ATTR_MAX:
default:
/* No support for matching other metadata formats yet. */
break;
}
}
if (mask_attr) {
format_nsh_key_mask(ds, &nsh, &nsh_mask);
} else {
format_nsh_key(ds, &nsh);
}
}
static void
format_odp_tun_attr(const struct nlattr *attr, const struct nlattr *mask_attr,
struct ds *ds, bool verbose)
{
unsigned int left;
const struct nlattr *a;
uint16_t flags = 0;
uint16_t mask_flags = 0;
struct ofpbuf ofp;
ofpbuf_init(&ofp, 100);
NL_NESTED_FOR_EACH(a, left, attr) {
enum ovs_tunnel_key_attr type = nl_attr_type(a);
const struct nlattr *ma = NULL;
if (mask_attr) {
ma = nl_attr_find__(nl_attr_get(mask_attr),
nl_attr_get_size(mask_attr), type);
if (!ma) {
ma = generate_all_wildcard_mask(ovs_tun_key_attr_lens,
OVS_TUNNEL_KEY_ATTR_MAX,
&ofp, a);
}
}
if (!check_attr_len(ds, a, ma, ovs_tun_key_attr_lens,
OVS_TUNNEL_KEY_ATTR_MAX, true)) {
continue;
}
switch (type) {
case OVS_TUNNEL_KEY_ATTR_ID:
format_be64(ds, "tun_id", nl_attr_get_be64(a),
ma ? nl_attr_get(ma) : NULL, verbose);
flags |= FLOW_TNL_F_KEY;
if (ma) {
mask_flags |= FLOW_TNL_F_KEY;
}
break;
case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
format_ipv4(ds, "src", nl_attr_get_be32(a),
ma ? nl_attr_get(ma) : NULL, verbose);
break;
case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
format_ipv4(ds, "dst", nl_attr_get_be32(a),
ma ? nl_attr_get(ma) : NULL, verbose);
break;
case OVS_TUNNEL_KEY_ATTR_IPV6_SRC: {
struct in6_addr ipv6_src;
ipv6_src = nl_attr_get_in6_addr(a);
format_in6_addr(ds, "ipv6_src", &ipv6_src,
ma ? nl_attr_get(ma) : NULL, verbose);
break;
}
case OVS_TUNNEL_KEY_ATTR_IPV6_DST: {
struct in6_addr ipv6_dst;
ipv6_dst = nl_attr_get_in6_addr(a);
format_in6_addr(ds, "ipv6_dst", &ipv6_dst,
ma ? nl_attr_get(ma) : NULL, verbose);
break;
}
case OVS_TUNNEL_KEY_ATTR_TOS:
format_u8x(ds, "tos", nl_attr_get_u8(a),
ma ? nl_attr_get(ma) : NULL, verbose);
break;
case OVS_TUNNEL_KEY_ATTR_TTL:
format_u8u(ds, "ttl", nl_attr_get_u8(a),
ma ? nl_attr_get(ma) : NULL, verbose);
break;
case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
flags |= FLOW_TNL_F_DONT_FRAGMENT;
break;
case OVS_TUNNEL_KEY_ATTR_CSUM:
flags |= FLOW_TNL_F_CSUM;
break;
case OVS_TUNNEL_KEY_ATTR_TP_SRC:
format_be16(ds, "tp_src", nl_attr_get_be16(a),
ma ? nl_attr_get(ma) : NULL, verbose);
break;
case OVS_TUNNEL_KEY_ATTR_TP_DST:
format_be16(ds, "tp_dst", nl_attr_get_be16(a),
ma ? nl_attr_get(ma) : NULL, verbose);
break;
case OVS_TUNNEL_KEY_ATTR_OAM:
flags |= FLOW_TNL_F_OAM;
break;
case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
ds_put_cstr(ds, "vxlan(");
format_odp_tun_vxlan_opt(a, ma, ds, verbose);
ds_put_cstr(ds, "),");
break;
case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
ds_put_cstr(ds, "geneve(");
format_odp_tun_geneve(a, ma, ds, verbose);
ds_put_cstr(ds, "),");
break;
case OVS_TUNNEL_KEY_ATTR_PAD:
break;
case OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS:
ds_put_cstr(ds, "erspan(");
format_odp_tun_erspan_opt(a, ma, ds, verbose);
ds_put_cstr(ds, "),");
break;
case OVS_TUNNEL_KEY_ATTR_GTPU_OPTS:
ds_put_cstr(ds, "gtpu(");
format_odp_tun_gtpu_opt(a, ma, ds, verbose);
ds_put_cstr(ds, "),");
break;
case __OVS_TUNNEL_KEY_ATTR_MAX:
default:
format_unknown_key(ds, a, ma);
}
ofpbuf_clear(&ofp);
}
/* Flags can have a valid mask even if the attribute is not set, so
* we need to collect these separately. */
if (mask_attr) {
NL_NESTED_FOR_EACH(a, left, mask_attr) {
switch (nl_attr_type(a)) {
case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
mask_flags |= FLOW_TNL_F_DONT_FRAGMENT;
break;
case OVS_TUNNEL_KEY_ATTR_CSUM:
mask_flags |= FLOW_TNL_F_CSUM;
break;
case OVS_TUNNEL_KEY_ATTR_OAM:
mask_flags |= FLOW_TNL_F_OAM;
break;
}
}
}
format_tun_flags(ds, "flags", flags, mask_attr ? &mask_flags : NULL,
verbose);
ds_chomp(ds, ',');
ofpbuf_uninit(&ofp);
}
static const char *
odp_ct_state_to_string(uint32_t flag)
{
switch (flag) {
case OVS_CS_F_REPLY_DIR:
return "rpl";
case OVS_CS_F_TRACKED:
return "trk";
case OVS_CS_F_NEW:
return "new";
case OVS_CS_F_ESTABLISHED:
return "est";
case OVS_CS_F_RELATED:
return "rel";
case OVS_CS_F_INVALID:
return "inv";
case OVS_CS_F_SRC_NAT:
return "snat";
case OVS_CS_F_DST_NAT:
return "dnat";
default:
return NULL;
}
}
static void
format_frag(struct ds *ds, const char *name, uint8_t key,
const uint8_t *mask, bool verbose OVS_UNUSED)
{
bool mask_empty = mask && !*mask;
bool mask_full = !mask || *mask == UINT8_MAX;
/* ODP frag is an enumeration field; partial masks are not meaningful. */
if (!mask_empty && !mask_full) {
ds_put_format(ds, "error: partial mask not supported for frag (%#"
PRIx8"),", *mask);
} else if (!mask_empty) {
ds_put_format(ds, "%s=%s,", name, ovs_frag_type_to_string(key));
}
}
static bool
mask_empty(const struct nlattr *ma)
{
const void *mask;
size_t n;
if (!ma) {
return true;
}
mask = nl_attr_get(ma);
n = nl_attr_get_size(ma);
return is_all_zeros(mask, n);
}
/* The caller must have already verified that 'a' and 'ma' have correct
* lengths. */
static void
format_odp_key_attr__(const struct nlattr *a, const struct nlattr *ma,
const struct hmap *portno_names, struct ds *ds,
bool verbose, bool skip_no_mask)
{
enum ovs_key_attr attr = nl_attr_type(a);
char namebuf[OVS_KEY_ATTR_BUFSIZE];
bool is_exact;
is_exact = ma ? odp_mask_attr_is_exact(ma) : true;
ds_put_cstr(ds, ovs_key_attr_to_string(attr, namebuf, sizeof namebuf));
ds_put_char(ds, '(');
switch (attr) {
case OVS_KEY_ATTR_ENCAP:
if (ma && nl_attr_get_size(ma) && nl_attr_get_size(a)) {
odp_flow_format(nl_attr_get(a), nl_attr_get_size(a),
nl_attr_get(ma), nl_attr_get_size(ma), NULL, ds,
verbose, skip_no_mask);
} else if (nl_attr_get_size(a)) {
odp_flow_format(nl_attr_get(a), nl_attr_get_size(a), NULL, 0, NULL,
ds, verbose, skip_no_mask);
}
break;
case OVS_KEY_ATTR_PRIORITY:
case OVS_KEY_ATTR_SKB_MARK:
case OVS_KEY_ATTR_DP_HASH:
case OVS_KEY_ATTR_RECIRC_ID:
ds_put_format(ds, "%#"PRIx32, nl_attr_get_u32(a));
if (!is_exact) {
ds_put_format(ds, "/%#"PRIx32, nl_attr_get_u32(ma));
}
break;
case OVS_KEY_ATTR_CT_MARK:
if (verbose || !mask_empty(ma)) {
ds_put_format(ds, "%#"PRIx32, nl_attr_get_u32(a));
if (!is_exact) {
ds_put_format(ds, "/%#"PRIx32, nl_attr_get_u32(ma));
}
}
break;
case OVS_KEY_ATTR_CT_STATE:
if (verbose) {
ds_put_format(ds, "%#"PRIx32, nl_attr_get_u32(a));
if (!is_exact) {
ds_put_format(ds, "/%#"PRIx32,
mask_empty(ma) ? 0 : nl_attr_get_u32(ma));
}
} else if (!is_exact) {
format_flags_masked(ds, NULL, odp_ct_state_to_string,
nl_attr_get_u32(a),
mask_empty(ma) ? 0 : nl_attr_get_u32(ma),
UINT32_MAX);
} else {
format_flags(ds, odp_ct_state_to_string, nl_attr_get_u32(a), '|');
}
break;
case OVS_KEY_ATTR_CT_ZONE:
if (verbose || !mask_empty(ma)) {
ds_put_format(ds, "%#"PRIx16, nl_attr_get_u16(a));
if (!is_exact) {
ds_put_format(ds, "/%#"PRIx16, nl_attr_get_u16(ma));
}
}
break;
case OVS_KEY_ATTR_CT_LABELS: {
const ovs_32aligned_u128 *value = nl_attr_get(a);
const ovs_32aligned_u128 *mask = ma ? nl_attr_get(ma) : NULL;
format_u128(ds, value, mask, verbose);
break;
}
case OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4: {
const struct ovs_key_ct_tuple_ipv4 *key = nl_attr_get(a);
const struct ovs_key_ct_tuple_ipv4 *mask = ma ? nl_attr_get(ma) : NULL;
format_ipv4(ds, "src", key->ipv4_src, MASK(mask, ipv4_src), verbose);
format_ipv4(ds, "dst", key->ipv4_dst, MASK(mask, ipv4_dst), verbose);
format_u8u(ds, "proto", key->ipv4_proto, MASK(mask, ipv4_proto),
verbose);
format_be16(ds, "tp_src", key->src_port, MASK(mask, src_port),
verbose);
format_be16(ds, "tp_dst", key->dst_port, MASK(mask, dst_port),
verbose);
ds_chomp(ds, ',');
break;
}
case OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6: {
const struct ovs_key_ct_tuple_ipv6 *key = nl_attr_get(a);
const struct ovs_key_ct_tuple_ipv6 *mask = ma ? nl_attr_get(ma) : NULL;
format_in6_addr(ds, "src", &key->ipv6_src, MASK(mask, ipv6_src),
verbose);
format_in6_addr(ds, "dst", &key->ipv6_dst, MASK(mask, ipv6_dst),
verbose);
format_u8u(ds, "proto", key->ipv6_proto, MASK(mask, ipv6_proto),
verbose);
format_be16(ds, "src_port", key->src_port, MASK(mask, src_port),
verbose);
format_be16(ds, "dst_port", key->dst_port, MASK(mask, dst_port),
verbose);
ds_chomp(ds, ',');
break;
}
case OVS_KEY_ATTR_TUNNEL:
format_odp_tun_attr(a, ma, ds, verbose);
break;
case OVS_KEY_ATTR_IN_PORT:
if (is_exact) {
odp_portno_name_format(portno_names, nl_attr_get_odp_port(a), ds);
} else {
ds_put_format(ds, "%"PRIu32, nl_attr_get_u32(a));
if (!is_exact) {
ds_put_format(ds, "/%#"PRIx32, nl_attr_get_u32(ma));
}
}
break;
case OVS_KEY_ATTR_PACKET_TYPE: {
ovs_be32 value = nl_attr_get_be32(a);
ovs_be32 mask = ma ? nl_attr_get_be32(ma) : OVS_BE32_MAX;
ovs_be16 ns = htons(pt_ns(value));
ovs_be16 ns_mask = htons(pt_ns(mask));
format_be16(ds, "ns", ns, &ns_mask, verbose);
ovs_be16 ns_type = pt_ns_type_be(value);
ovs_be16 ns_type_mask = pt_ns_type_be(mask);
format_be16x(ds, "id", ns_type, &ns_type_mask, verbose);
ds_chomp(ds, ',');
break;
}
case OVS_KEY_ATTR_ETHERNET: {
const struct ovs_key_ethernet *mask = ma ? nl_attr_get(ma) : NULL;
const struct ovs_key_ethernet *key = nl_attr_get(a);
format_eth(ds, "src", key->eth_src, MASK(mask, eth_src), verbose);
format_eth(ds, "dst", key->eth_dst, MASK(mask, eth_dst), verbose);
ds_chomp(ds, ',');
break;
}
case OVS_KEY_ATTR_VLAN:
format_vlan_tci(ds, nl_attr_get_be16(a),
ma ? nl_attr_get_be16(ma) : OVS_BE16_MAX, verbose);
break;
case OVS_KEY_ATTR_MPLS: {
const struct ovs_key_mpls *mpls_key = nl_attr_get(a);
const struct ovs_key_mpls *mpls_mask = NULL;
size_t size = nl_attr_get_size(a);
if (!size || size % sizeof *mpls_key) {
ds_put_format(ds, "(bad key length %"PRIuSIZE")", size);
return;
}
if (!is_exact) {
mpls_mask = nl_attr_get(ma);
if (size != nl_attr_get_size(ma)) {
ds_put_format(ds, "(key length %"PRIuSIZE" != "
"mask length %"PRIuSIZE")",
size, nl_attr_get_size(ma));
return;
}
}
format_mpls(ds, mpls_key, mpls_mask, size / sizeof *mpls_key);
break;
}
case OVS_KEY_ATTR_ETHERTYPE:
ds_put_format(ds, "0x%04"PRIx16, ntohs(nl_attr_get_be16(a)));
if (!is_exact) {
ds_put_format(ds, "/0x%04"PRIx16, ntohs(nl_attr_get_be16(ma)));
}
break;
case OVS_KEY_ATTR_IPV4: {
const struct ovs_key_ipv4 *key = nl_attr_get(a);
const struct ovs_key_ipv4 *mask = ma ? nl_attr_get(ma) : NULL;
format_ipv4(ds, "src", key->ipv4_src, MASK(mask, ipv4_src), verbose);
format_ipv4(ds, "dst", key->ipv4_dst, MASK(mask, ipv4_dst), verbose);
format_u8u(ds, "proto", key->ipv4_proto, MASK(mask, ipv4_proto),
verbose);
format_u8x(ds, "tos", key->ipv4_tos, MASK(mask, ipv4_tos), verbose);
format_u8u(ds, "ttl", key->ipv4_ttl, MASK(mask, ipv4_ttl), verbose);
format_frag(ds, "frag", key->ipv4_frag, MASK(mask, ipv4_frag),
verbose);
ds_chomp(ds, ',');
break;
}
case OVS_KEY_ATTR_IPV6: {
const struct ovs_key_ipv6 *key = nl_attr_get(a);
const struct ovs_key_ipv6 *mask = ma ? nl_attr_get(ma) : NULL;
format_in6_addr(ds, "src", &key->ipv6_src, MASK(mask, ipv6_src),
verbose);
format_in6_addr(ds, "dst", &key->ipv6_dst, MASK(mask, ipv6_dst),
verbose);
format_ipv6_label(ds, "label", key->ipv6_label, MASK(mask, ipv6_label),
verbose);
format_u8u(ds, "proto", key->ipv6_proto, MASK(mask, ipv6_proto),
verbose);
format_u8x(ds, "tclass", key->ipv6_tclass, MASK(mask, ipv6_tclass),
verbose);
format_u8u(ds, "hlimit", key->ipv6_hlimit, MASK(mask, ipv6_hlimit),
verbose);
format_frag(ds, "frag", key->ipv6_frag, MASK(mask, ipv6_frag),
verbose);
ds_chomp(ds, ',');
break;
}
/* These have the same structure and format. */
case OVS_KEY_ATTR_TCP:
case OVS_KEY_ATTR_UDP:
case OVS_KEY_ATTR_SCTP: {
const struct ovs_key_tcp *key = nl_attr_get(a);
const struct ovs_key_tcp *mask = ma ? nl_attr_get(ma) : NULL;
format_be16(ds, "src", key->tcp_src, MASK(mask, tcp_src), verbose);
format_be16(ds, "dst", key->tcp_dst, MASK(mask, tcp_dst), verbose);
ds_chomp(ds, ',');
break;
}
case OVS_KEY_ATTR_TCP_FLAGS:
if (!is_exact) {
format_flags_masked(ds, NULL, packet_tcp_flag_to_string,
ntohs(nl_attr_get_be16(a)),
TCP_FLAGS(nl_attr_get_be16(ma)),
TCP_FLAGS(OVS_BE16_MAX));
} else {
format_flags(ds, packet_tcp_flag_to_string,
ntohs(nl_attr_get_be16(a)), '|');
}
break;
case OVS_KEY_ATTR_ICMP: {
const struct ovs_key_icmp *key = nl_attr_get(a);
const struct ovs_key_icmp *mask = ma ? nl_attr_get(ma) : NULL;
format_u8u(ds, "type", key->icmp_type, MASK(mask, icmp_type), verbose);
format_u8u(ds, "code", key->icmp_code, MASK(mask, icmp_code), verbose);
ds_chomp(ds, ',');
break;
}
case OVS_KEY_ATTR_ICMPV6: {
const struct ovs_key_icmpv6 *key = nl_attr_get(a);
const struct ovs_key_icmpv6 *mask = ma ? nl_attr_get(ma) : NULL;
format_u8u(ds, "type", key->icmpv6_type, MASK(mask, icmpv6_type),
verbose);
format_u8u(ds, "code", key->icmpv6_code, MASK(mask, icmpv6_code),
verbose);
ds_chomp(ds, ',');
break;
}
case OVS_KEY_ATTR_ARP: {
const struct ovs_key_arp *mask = ma ? nl_attr_get(ma) : NULL;
const struct ovs_key_arp *key = nl_attr_get(a);
format_ipv4(ds, "sip", key->arp_sip, MASK(mask, arp_sip), verbose);
format_ipv4(ds, "tip", key->arp_tip, MASK(mask, arp_tip), verbose);
format_be16(ds, "op", key->arp_op, MASK(mask, arp_op), verbose);
format_eth(ds, "sha", key->arp_sha, MASK(mask, arp_sha), verbose);
format_eth(ds, "tha", key->arp_tha, MASK(mask, arp_tha), verbose);
ds_chomp(ds, ',');
break;
}
case OVS_KEY_ATTR_ND: {
const struct ovs_key_nd *mask = ma ? nl_attr_get(ma) : NULL;
const struct ovs_key_nd *key = nl_attr_get(a);
format_in6_addr(ds, "target", &key->nd_target, MASK(mask, nd_target),
verbose);
format_eth(ds, "sll", key->nd_sll, MASK(mask, nd_sll), verbose);
format_eth(ds, "tll", key->nd_tll, MASK(mask, nd_tll), verbose);
ds_chomp(ds, ',');
break;
}
case OVS_KEY_ATTR_ND_EXTENSIONS: {
const struct ovs_key_nd_extensions *mask = ma ? nl_attr_get(ma) : NULL;
const struct ovs_key_nd_extensions *key = nl_attr_get(a);
bool first = true;
format_be32_masked(ds, &first, "nd_reserved", key->nd_reserved,
OVS_BE32_MAX);
ds_put_char(ds, ',');
format_u8u(ds, "nd_options_type", key->nd_options_type,
MASK(mask, nd_options_type), verbose);
ds_chomp(ds, ',');
break;
}
case OVS_KEY_ATTR_NSH: {
format_odp_nsh_attr(a, ma, ds);
break;
}
case OVS_KEY_ATTR_UNSPEC:
case OVS_KEY_ATTR_TUNNEL_INFO:
case __OVS_KEY_ATTR_MAX:
default:
format_generic_odp_key(a, ds);
if (!is_exact) {
ds_put_char(ds, '/');
format_generic_odp_key(ma, ds);
}
break;
}
ds_put_char(ds, ')');
}
static void
format_odp_key_attr(const struct nlattr *a, const struct nlattr *ma,
const struct hmap *portno_names, struct ds *ds,
bool verbose)
{
if (check_attr_len(ds, a, ma, ovs_flow_key_attr_lens,
OVS_KEY_ATTR_MAX, false)) {
format_odp_key_attr__(a, ma, portno_names, ds, verbose, false);
}
}
static struct nlattr *
generate_all_wildcard_mask(const struct attr_len_tbl tbl[], int max,
struct ofpbuf *ofp, const struct nlattr *key)
{
const struct nlattr *a;
unsigned int left;
int type = nl_attr_type(key);
int size = nl_attr_get_size(key);
if (odp_key_attr_len(tbl, max, type) != ATTR_LEN_NESTED) {
nl_msg_put_unspec_zero(ofp, type, size);
} else {
size_t nested_mask;
if (tbl[type].next) {
const struct attr_len_tbl *entry = &tbl[type];
tbl = entry->next;
max = entry->next_max;
}
nested_mask = nl_msg_start_nested(ofp, type);
NL_ATTR_FOR_EACH(a, left, key, nl_attr_get_size(key)) {
generate_all_wildcard_mask(tbl, max, ofp, nl_attr_get(a));
}
nl_msg_end_nested(ofp, nested_mask);
}
return ofp->base;
}
static void
format_u128(struct ds *ds, const ovs_32aligned_u128 *key,
const ovs_32aligned_u128 *mask, bool verbose)
{
if (verbose || (mask && !ovs_u128_is_zero(get_32aligned_u128(mask)))) {
ovs_be128 value = hton128(get_32aligned_u128(key));
ds_put_hex(ds, &value, sizeof value);
if (mask && !(ovs_u128_is_ones(get_32aligned_u128(mask)))) {
value = hton128(get_32aligned_u128(mask));
ds_put_char(ds, '/');
ds_put_hex(ds, &value, sizeof value);
}
}
}
/* Read the string from 's_' as a 128-bit value. If the string contains
* a "/", the rest of the string will be treated as a 128-bit mask.
*
* If either the value or mask is larger than 64 bits, the string must
* be in hexadecimal.
*/
static int
scan_u128(const char *s_, ovs_u128 *value, ovs_u128 *mask)
{
char *s = CONST_CAST(char *, s_);
ovs_be128 be_value;
ovs_be128 be_mask;
if (!parse_int_string(s, (uint8_t *)&be_value, sizeof be_value, &s)) {
*value = ntoh128(be_value);
if (mask) {
int n;
if (ovs_scan(s, "/%n", &n)) {
int error;
s += n;
error = parse_int_string(s, (uint8_t *)&be_mask,
sizeof be_mask, &s);
if (error) {
return 0;
}
*mask = ntoh128(be_mask);
} else {
*mask = OVS_U128_MAX;
}
}
return s - s_;
}
return 0;
}
int
odp_ufid_from_string(const char *s_, ovs_u128 *ufid)
{
const char *s = s_;
if (ovs_scan(s, "ufid:")) {
s += 5;
if (!uuid_from_string_prefix((struct uuid *)ufid, s)) {
return -EINVAL;
}
s += UUID_LEN;
return s - s_;
}
return 0;
}
void
odp_format_ufid(const ovs_u128 *ufid, struct ds *ds)
{
ds_put_format(ds, "ufid:"UUID_FMT, UUID_ARGS((struct uuid *)ufid));
}
/* Appends to 'ds' a string representation of the 'key_len' bytes of
* OVS_KEY_ATTR_* attributes in 'key'. If non-null, additionally formats the
* 'mask_len' bytes of 'mask' which apply to 'key'. If 'portno_names' is
* non-null, translates odp port number to its name. If 'skip_no_mask' is set
* to true, OVS_KEY_ATTR_* entries without a mask will not be printed, even
* when verbose mode is 'true'. */
void
odp_flow_format(const struct nlattr *key, size_t key_len,
const struct nlattr *mask, size_t mask_len,
const struct hmap *portno_names, struct ds *ds, bool verbose,
bool skip_no_mask)
{
if (key_len) {
const struct nlattr *a;
unsigned int left;
bool has_ethtype_key = false;
bool has_packet_type_key = false;
struct ofpbuf ofp;
bool first_field = true;
ofpbuf_init(&ofp, 100);
NL_ATTR_FOR_EACH (a, left, key, key_len) {
int attr_type = nl_attr_type(a);
const struct nlattr *ma = (mask && mask_len
? nl_attr_find__(mask, mask_len,
attr_type)
: NULL);
if (!check_attr_len(ds, a, ma, ovs_flow_key_attr_lens,
OVS_KEY_ATTR_MAX, false)
|| (skip_no_mask && !ma)) {
continue;
}
bool is_nested_attr;
bool is_wildcard = false;
if (attr_type == OVS_KEY_ATTR_ETHERTYPE) {
has_ethtype_key = true;
} else if (attr_type == OVS_KEY_ATTR_PACKET_TYPE) {
has_packet_type_key = true;
}
is_nested_attr = odp_key_attr_len(ovs_flow_key_attr_lens,
OVS_KEY_ATTR_MAX, attr_type) ==
ATTR_LEN_NESTED;
if (mask && mask_len) {
ma = nl_attr_find__(mask, mask_len, nl_attr_type(a));
is_wildcard = ma ? odp_mask_attr_is_wildcard(ma) : true;
}
if (verbose || !is_wildcard || is_nested_attr) {
if (is_wildcard && !ma) {
ma = generate_all_wildcard_mask(ovs_flow_key_attr_lens,
OVS_KEY_ATTR_MAX,
&ofp, a);
}
if (!first_field) {
ds_put_char(ds, ',');
}
format_odp_key_attr__(a, ma, portno_names, ds, verbose,
skip_no_mask);
first_field = false;
} else if (attr_type == OVS_KEY_ATTR_ETHERNET
&& !has_packet_type_key) {
/* This special case reflects differences between the kernel
* and userspace datapaths regarding the root type of the
* packet being matched (typically Ethernet but some tunnels
* can encapsulate IPv4 etc.). The kernel datapath does not
* have an explicit way to indicate packet type; instead:
*
* - If OVS_KEY_ATTR_ETHERNET is present, the packet is an
* Ethernet packet and OVS_KEY_ATTR_ETHERTYPE is the
* Ethertype encoded in the Ethernet header.
*
* - If OVS_KEY_ATTR_ETHERNET is absent, then the packet's
* root type is that encoded in OVS_KEY_ATTR_ETHERTYPE
* (i.e. if OVS_KEY_ATTR_ETHERTYPE is 0x0800 then the
* packet is an IPv4 packet).
*
* Thus, if OVS_KEY_ATTR_ETHERNET is present, even if it is
* all-wildcarded, it is important to print it.
*
* On the other hand, the userspace datapath supports
* OVS_KEY_ATTR_PACKET_TYPE and uses it to indicate the packet
* type. Thus, if OVS_KEY_ATTR_PACKET_TYPE is present, we need
* not print an all-wildcarded OVS_KEY_ATTR_ETHERNET. */
if (!first_field) {
ds_put_char(ds, ',');
}
ds_put_cstr(ds, "eth()");
} else if (attr_type == OVS_KEY_ATTR_PACKET_TYPE && is_wildcard) {
/* See the above help text, however in the case where the
* packet type is not shown, we still need to display the
* eth() header if the packets type is wildcarded. */
has_packet_type_key = false;
}
ofpbuf_clear(&ofp);
}
ofpbuf_uninit(&ofp);
if (left) {
int i;
if (left == key_len) {
ds_put_cstr(ds, "<empty>");
}
ds_put_format(ds, ",***%u leftover bytes*** (", left);
for (i = 0; i < left; i++) {
ds_put_format(ds, "%02x", ((const uint8_t *) a)[i]);
}
ds_put_char(ds, ')');
}
if (!has_ethtype_key && mask) {
const struct nlattr *ma = nl_attr_find__(mask, mask_len,
OVS_KEY_ATTR_ETHERTYPE);
if (ma) {
ds_put_format(ds, ",eth_type(0/0x%04"PRIx16")",
ntohs(nl_attr_get_be16(ma)));
}
}
} else {
ds_put_cstr(ds, "<empty>");
}
}
/* Appends to 'ds' a string representation of the 'key_len' bytes of
* OVS_KEY_ATTR_* attributes in 'key'. */
void
odp_flow_key_format(const struct nlattr *key,
size_t key_len, struct ds *ds)
{
odp_flow_format(key, key_len, NULL, 0, NULL, ds, true, false);
}
static bool
ovs_frag_type_from_string(const char *s, enum ovs_frag_type *type)
{
if (!strcasecmp(s, "no")) {
*type = OVS_FRAG_TYPE_NONE;
} else if (!strcasecmp(s, "first")) {
*type = OVS_FRAG_TYPE_FIRST;
} else if (!strcasecmp(s, "later")) {
*type = OVS_FRAG_TYPE_LATER;
} else {
return false;
}
return true;
}
/* Parsing. */
static int
scan_eth(const char *s, struct eth_addr *key, struct eth_addr *mask)
{
int n;
if (ovs_scan(s, ETH_ADDR_SCAN_FMT"%n",
ETH_ADDR_SCAN_ARGS(*key), &n)) {
int len = n;
if (mask) {
if (ovs_scan(s + len, "/"ETH_ADDR_SCAN_FMT"%n",
ETH_ADDR_SCAN_ARGS(*mask), &n)) {
len += n;
} else {
memset(mask, 0xff, sizeof *mask);
}
}
return len;
}
return 0;
}
static int
scan_ipv4(const char *s, ovs_be32 *key, ovs_be32 *mask)
{
int n;
if (ovs_scan(s, IP_SCAN_FMT"%n", IP_SCAN_ARGS(key), &n)) {
int len = n;
if (mask) {
if (ovs_scan(s + len, "/"IP_SCAN_FMT"%n",
IP_SCAN_ARGS(mask), &n)) {
len += n;
} else {
*mask = OVS_BE32_MAX;
}
}
return len;
}
return 0;
}
static int
scan_in6_addr(const char *s, struct in6_addr *key, struct in6_addr *mask)
{
int n;
char ipv6_s[IPV6_SCAN_LEN + 1];
if (ovs_scan(s, IPV6_SCAN_FMT"%n", ipv6_s, &n)
&& inet_pton(AF_INET6, ipv6_s, key) == 1) {
int len = n;
if (mask) {
if (ovs_scan(s + len, "/"IPV6_SCAN_FMT"%n", ipv6_s, &n)
&& inet_pton(AF_INET6, ipv6_s, mask) == 1) {
len += n;
} else {
memset(mask, 0xff, sizeof *mask);
}
}
return len;
}
return 0;
}
static int
scan_ipv6_label(const char *s, ovs_be32 *key, ovs_be32 *mask)
{
int key_, mask_;
int n;
if (ovs_scan(s, "%i%n", &key_, &n)
&& (key_ & ~IPV6_LABEL_MASK) == 0) {
int len = n;
*key = htonl(key_);
if (mask) {
if (ovs_scan(s + len, "/%i%n", &mask_, &n)
&& (mask_ & ~IPV6_LABEL_MASK) == 0) {
len += n;
*mask = htonl(mask_);
} else {
*mask = htonl(IPV6_LABEL_MASK);
}
}
return len;
}
return 0;
}
static int
scan_u8(const char *s, uint8_t *key, uint8_t *mask)
{
int n;
if (ovs_scan(s, "%"SCNi8"%n", key, &n)) {
int len = n;
if (mask) {
if (ovs_scan(s + len, "/%"SCNi8"%n", mask, &n)) {
len += n;
} else {
*mask = UINT8_MAX;
}
}
return len;
}
return 0;
}
static int
scan_u16(const char *s, uint16_t *key, uint16_t *mask)
{
int n;
if (ovs_scan(s, "%"SCNi16"%n", key, &n)) {
int len = n;
if (mask) {
if (ovs_scan(s + len, "/%"SCNi16"%n", mask, &n)) {
len += n;
} else {
*mask = UINT16_MAX;
}
}
return len;
}
return 0;
}
static int
scan_u32(const char *s, uint32_t *key, uint32_t *mask)
{
int n;
if (ovs_scan(s, "%"SCNi32"%n", key, &n)) {
int len = n;
if (mask) {
if (ovs_scan(s + len, "/%"SCNi32"%n", mask, &n)) {
len += n;
} else {
*mask = UINT32_MAX;
}
}
return len;
}
return 0;
}
static int
scan_be16(const char *s, ovs_be16 *key, ovs_be16 *mask)
{
uint16_t key_, mask_;
int n;
if (ovs_scan(s, "%"SCNi16"%n", &key_, &n)) {
int len = n;
*key = htons(key_);
if (mask) {
if (ovs_scan(s + len, "/%"SCNi16"%n", &mask_, &n)) {
len += n;
*mask = htons(mask_);
} else {
*mask = OVS_BE16_MAX;
}
}
return len;
}
return 0;
}
static int
scan_be32(const char *s, ovs_be32 *key, ovs_be32 *mask)
{
uint32_t key_, mask_;
int n;
if (ovs_scan(s, "%"SCNi32"%n", &key_, &n)) {
int len = n;
*key = htonl(key_);
if (mask) {
if (ovs_scan(s + len, "/%"SCNi32"%n", &mask_, &n)) {
len += n;
*mask = htonl(mask_);
} else {
*mask = OVS_BE32_MAX;
}
}
return len;
}
return 0;
}
static int
scan_be64(const char *s, ovs_be64 *key, ovs_be64 *mask)
{
uint64_t key_, mask_;
int n;
if (ovs_scan(s, "%"SCNi64"%n", &key_, &n)) {
int len = n;
*key = htonll(key_);
if (mask) {
if (ovs_scan(s + len, "/%"SCNi64"%n", &mask_, &n)) {
len += n;
*mask = htonll(mask_);
} else {
*mask = OVS_BE64_MAX;
}
}
return len;
}
return 0;
}
static int
scan_tun_flags(const char *s, uint16_t *key, uint16_t *mask)
{
uint32_t flags, fmask;
int n;
n = parse_odp_flags(s, flow_tun_flag_to_string, &flags,
FLOW_TNL_F_MASK, mask ? &fmask : NULL);
if (n >= 0 && s[n] == ')') {
*key = flags;
if (mask) {
*mask = fmask;
}
return n + 1;
}
return 0;
}
static int
scan_tcp_flags(const char *s, ovs_be16 *key, ovs_be16 *mask)
{
uint32_t flags, fmask;
int n;
n = parse_odp_flags(s, packet_tcp_flag_to_string, &flags,
TCP_FLAGS(OVS_BE16_MAX), mask ? &fmask : NULL);
if (n >= 0) {
*key = htons(flags);
if (mask) {
*mask = htons(fmask);
}
return n;
}
return 0;
}
static uint32_t
ovs_to_odp_ct_state(uint8_t state)
{
uint32_t odp = 0;
#define CS_STATE(ENUM, INDEX, NAME) \
if (state & CS_##ENUM) { \
odp |= OVS_CS_F_##ENUM; \
}
CS_STATES
#undef CS_STATE
return odp;
}
static uint8_t
odp_to_ovs_ct_state(uint32_t flags)
{
uint32_t state = 0;
#define CS_STATE(ENUM, INDEX, NAME) \
if (flags & OVS_CS_F_##ENUM) { \
state |= CS_##ENUM; \
}
CS_STATES
#undef CS_STATE
return state;
}
static int
scan_ct_state(const char *s, uint32_t *key, uint32_t *mask)
{
uint32_t flags, fmask;
int n;
n = parse_flags(s, odp_ct_state_to_string, ')', NULL, NULL, &flags,
ovs_to_odp_ct_state(CS_SUPPORTED_MASK),
mask ? &fmask : NULL);
if (n >= 0) {
*key = flags;
if (mask) {
*mask = fmask;
}
return n;
}
return 0;
}
static int
scan_frag(const char *s, uint8_t *key, uint8_t *mask)
{
int n;
char frag[8];
enum ovs_frag_type frag_type;
if (ovs_scan(s, "%7[a-z]%n", frag, &n)
&& ovs_frag_type_from_string(frag, &frag_type)) {
int len = n;
*key = frag_type;
if (mask) {
*mask = UINT8_MAX;
}
return len;
}
return 0;
}
static int
scan_port(const char *s, uint32_t *key, uint32_t *mask,
const struct simap *port_names)
{
int n;
if (ovs_scan(s, "%"SCNi32"%n", key, &n)) {
int len = n;
if (mask) {
if (ovs_scan(s + len, "/%"SCNi32"%n", mask, &n)) {
len += n;
} else {
*mask = UINT32_MAX;
}
}
return len;
} else if (port_names) {
const struct simap_node *node;
int len;
len = strcspn(s, ")");
node = simap_find_len(port_names, s, len);
if (node) {
*key = node->data;
if (mask) {
*mask = UINT32_MAX;
}
return len;
}
}
return 0;
}
/* Helper for vlan parsing. */
struct ovs_key_vlan__ {
ovs_be16 tci;
};
static bool
set_be16_bf(ovs_be16 *bf, uint8_t bits, uint8_t offset, uint16_t value)
{
const uint16_t mask = ((1U << bits) - 1) << offset;
if (value >> bits) {
return false;
}
*bf = htons((ntohs(*bf) & ~mask) | (value << offset));
return true;
}
static int
scan_be16_bf(const char *s, ovs_be16 *key, ovs_be16 *mask, uint8_t bits,
uint8_t offset)
{
uint16_t key_, mask_;
int n;
if (ovs_scan(s, "%"SCNi16"%n", &key_, &n)) {
int len = n;
if (set_be16_bf(key, bits, offset, key_)) {
if (mask) {
if (ovs_scan(s + len, "/%"SCNi16"%n", &mask_, &n)) {
len += n;
if (!set_be16_bf(mask, bits, offset, mask_)) {
return 0;
}
} else {
*mask |= htons(((1U << bits) - 1) << offset);
}
}
return len;
}
}
return 0;
}
static int
scan_vid(const char *s, ovs_be16 *key, ovs_be16 *mask)
{
return scan_be16_bf(s, key, mask, 12, VLAN_VID_SHIFT);
}
static int
scan_pcp(const char *s, ovs_be16 *key, ovs_be16 *mask)
{
return scan_be16_bf(s, key, mask, 3, VLAN_PCP_SHIFT);
}
static int
scan_cfi(const char *s, ovs_be16 *key, ovs_be16 *mask)
{
return scan_be16_bf(s, key, mask, 1, VLAN_CFI_SHIFT);
}
/* For MPLS. */
static bool
set_be32_bf(ovs_be32 *bf, uint8_t bits, uint8_t offset, uint32_t value)
{
const uint32_t mask = ((1U << bits) - 1) << offset;
if (value >> bits) {
return false;
}
*bf = htonl((ntohl(*bf) & ~mask) | (value << offset));
return true;
}
static int
scan_be32_bf(const char *s, ovs_be32 *key, ovs_be32 *mask, uint8_t bits,
uint8_t offset)
{
uint32_t key_, mask_;
int n;
if (ovs_scan(s, "%"SCNi32"%n", &key_, &n)) {
int len = n;
if (set_be32_bf(key, bits, offset, key_)) {
if (mask) {
if (ovs_scan(s + len, "/%"SCNi32"%n", &mask_, &n)) {
len += n;
if (!set_be32_bf(mask, bits, offset, mask_)) {
return 0;
}
} else {
*mask |= htonl(((1U << bits) - 1) << offset);
}
}
return len;
}
}
return 0;
}
static int
scan_mpls_label(const char *s, ovs_be32 *key, ovs_be32 *mask)
{
return scan_be32_bf(s, key, mask, 20, MPLS_LABEL_SHIFT);
}
static int
scan_mpls_tc(const char *s, ovs_be32 *key, ovs_be32 *mask)
{
return scan_be32_bf(s, key, mask, 3, MPLS_TC_SHIFT);
}
static int
scan_mpls_ttl(const char *s, ovs_be32 *key, ovs_be32 *mask)
{
return scan_be32_bf(s, key, mask, 8, MPLS_TTL_SHIFT);
}
static int
scan_mpls_bos(const char *s, ovs_be32 *key, ovs_be32 *mask)
{
return scan_be32_bf(s, key, mask, 1, MPLS_BOS_SHIFT);
}
static int
scan_vxlan_gbp(const char *s, uint32_t *key, uint32_t *mask)
{
const char *s_base = s;
ovs_be16 id = 0, id_mask = 0;
uint8_t flags = 0, flags_mask = 0;
int len;
if (!strncmp(s, "id=", 3)) {
s += 3;
len = scan_be16(s, &id, mask ? &id_mask : NULL);
if (len == 0) {
return 0;
}
s += len;
}
if (s[0] == ',') {
s++;
}
if (!strncmp(s, "flags=", 6)) {
s += 6;
len = scan_u8(s, &flags, mask ? &flags_mask : NULL);
if (len == 0) {
return 0;
}
s += len;
}
if (!strncmp(s, "))", 2)) {
s += 2;
*key = (flags << 16) | ntohs(id);
if (mask) {
*mask = (flags_mask << 16) | ntohs(id_mask);
}
return s - s_base;
}
return 0;
}
static int
scan_gtpu_metadata(const char *s,
struct gtpu_metadata *key,
struct gtpu_metadata *mask)
{
const char *s_base = s;
uint8_t flags = 0, flags_ma = 0;
uint8_t msgtype = 0, msgtype_ma = 0;
int len;
if (!strncmp(s, "flags=", 6)) {
s += 6;
len = scan_u8(s, &flags, mask ? &flags_ma : NULL);
if (len == 0) {
return 0;
}
s += len;
}
if (s[0] == ',') {
s++;
}
if (!strncmp(s, "msgtype=", 8)) {
s += 8;
len = scan_u8(s, &msgtype, mask ? &msgtype_ma : NULL);
if (len == 0) {
return 0;
}
s += len;
}
if (!strncmp(s, ")", 1)) {
s += 1;
key->flags = flags;
key->msgtype = msgtype;
if (mask) {
mask->flags = flags_ma;
mask->msgtype = msgtype_ma;
}
}
return s - s_base;
}
static int
scan_erspan_metadata(const char *s,
struct erspan_metadata *key,
struct erspan_metadata *mask)
{
const char *s_base = s;
uint32_t idx = 0, idx_mask = 0;
uint8_t ver = 0, dir = 0, hwid = 0;
uint8_t ver_mask = 0, dir_mask = 0, hwid_mask = 0;
int len;
if (!strncmp(s, "ver=", 4)) {
s += 4;
len = scan_u8(s, &ver, mask ? &ver_mask : NULL);
if (len == 0) {
return 0;
}
s += len;
}
if (s[0] == ',') {
s++;
}
if (ver == 1) {
if (!strncmp(s, "idx=", 4)) {
s += 4;
len = scan_u32(s, &idx, mask ? &idx_mask : NULL);
if (len == 0) {
return 0;
}
s += len;
}
if (!strncmp(s, ")", 1)) {
s += 1;
key->version = ver;
key->u.index = htonl(idx);
if (mask) {
mask->u.index = htonl(idx_mask);
}
}
return s - s_base;
} else if (ver == 2) {
if (!strncmp(s, "dir=", 4)) {
s += 4;
len = scan_u8(s, &dir, mask ? &dir_mask : NULL);
if (len == 0) {
return 0;
}
s += len;
}
if (s[0] == ',') {
s++;
}
if (!strncmp(s, "hwid=", 5)) {
s += 5;
len = scan_u8(s, &hwid, mask ? &hwid_mask : NULL);
if (len == 0) {
return 0;
}
s += len;
}
if (!strncmp(s, ")", 1)) {
s += 1;
key->version = ver;
key->u.md2.hwid = hwid;
key->u.md2.dir = dir;
if (mask) {
mask->u.md2.hwid = hwid_mask;
mask->u.md2.dir = dir_mask;
}
}
return s - s_base;
}
return 0;
}
static int
scan_geneve(const char *s, struct geneve_scan *key, struct geneve_scan *mask)
{
const char *s_base = s;
struct geneve_opt *opt = key->d;
struct geneve_opt *opt_mask = mask ? mask->d : NULL;
int len_remain = sizeof key->d;
int len;
while (s[0] == '{' && len_remain >= sizeof *opt) {
int data_len = 0;
s++;
len_remain -= sizeof *opt;
if (!strncmp(s, "class=", 6)) {
s += 6;
len = scan_be16(s, &opt->opt_class,
mask ? &opt_mask->opt_class : NULL);
if (len == 0) {
return 0;
}
s += len;
} else if (mask) {
memset(&opt_mask->opt_class, 0, sizeof opt_mask->opt_class);
}
if (s[0] == ',') {
s++;
}
if (!strncmp(s, "type=", 5)) {
s += 5;
len = scan_u8(s, &opt->type, mask ? &opt_mask->type : NULL);
if (len == 0) {
return 0;
}
s += len;
} else if (mask) {
memset(&opt_mask->type, 0, sizeof opt_mask->type);
}
if (s[0] == ',') {
s++;
}
if (!strncmp(s, "len=", 4)) {
uint8_t opt_len, opt_len_mask;
s += 4;
len = scan_u8(s, &opt_len, mask ? &opt_len_mask : NULL);
if (len == 0) {
return 0;
}
s += len;
if (opt_len > 124 || opt_len % 4 || opt_len > len_remain) {
return 0;
}
opt->length = opt_len / 4;
if (mask) {
opt_mask->length = opt_len_mask;
}
data_len = opt_len;
} else if (mask) {
memset(&opt_mask->type, 0, sizeof opt_mask->type);
}
if (s[0] == ',') {
s++;
if (parse_int_string(s, (uint8_t *)(opt + 1),
data_len, (char **)&s)) {
return 0;
}
}
if (mask) {
if (s[0] == '/') {
s++;
if (parse_int_string(s, (uint8_t *)(opt_mask + 1),
data_len, (char **)&s)) {
return 0;
}
}
opt_mask->r1 = 0;
opt_mask->r2 = 0;
opt_mask->r3 = 0;
}
if (s[0] == '}') {
s++;
opt += 1 + data_len / 4;
if (mask) {
opt_mask += 1 + data_len / 4;
}
len_remain -= data_len;
} else {
return 0;
}
}
if (s[0] == ')') {
len = sizeof key->d - len_remain;
s++;
key->len = len;
if (mask) {
mask->len = len;
}
return s - s_base;
}
return 0;
}
static void
tun_flags_to_attr(struct ofpbuf *a, const void *data_)
{
const uint16_t *flags = data_;
if (*flags & FLOW_TNL_F_DONT_FRAGMENT) {
nl_msg_put_flag(a, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT);
}
if (*flags & FLOW_TNL_F_CSUM) {
nl_msg_put_flag(a, OVS_TUNNEL_KEY_ATTR_CSUM);
}
if (*flags & FLOW_TNL_F_OAM) {
nl_msg_put_flag(a, OVS_TUNNEL_KEY_ATTR_OAM);
}
}
static void
vxlan_gbp_to_attr(struct ofpbuf *a, const void *data_)
{
const uint32_t *gbp = data_;
if (*gbp) {
size_t vxlan_opts_ofs;
vxlan_opts_ofs = nl_msg_start_nested(a, OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS);
nl_msg_put_u32(a, OVS_VXLAN_EXT_GBP, *gbp);
nl_msg_end_nested(a, vxlan_opts_ofs);
}
}
static void
geneve_to_attr(struct ofpbuf *a, const void *data_)
{
const struct geneve_scan *geneve = data_;
nl_msg_put_unspec(a, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS, geneve->d,
geneve->len);
}
static void
erspan_to_attr(struct ofpbuf *a, const void *data_)
{
const struct erspan_metadata *md = data_;
nl_msg_put_unspec(a, OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS, md,
sizeof *md);
}
static void
gtpu_to_attr(struct ofpbuf *a, const void *data_)
{
const struct gtpu_metadata *md = data_;
nl_msg_put_unspec(a, OVS_TUNNEL_KEY_ATTR_GTPU_OPTS, md,
sizeof *md);
}
#define SCAN_PUT_ATTR(BUF, ATTR, DATA, FUNC) \
{ \
unsigned long call_fn = (unsigned long)FUNC; \
if (call_fn) { \
typedef void (*fn)(struct ofpbuf *, const void *); \
fn func = FUNC; \
func(BUF, &(DATA)); \
} else { \
nl_msg_put_unspec(BUF, ATTR, &(DATA), sizeof (DATA)); \
} \
}
#define SCAN_IF(NAME) \
if (strncmp(s, NAME, strlen(NAME)) == 0) { \
const char *start = s; \
int len; \
\
s += strlen(NAME)
/* Usually no special initialization is needed. */
#define SCAN_BEGIN(NAME, TYPE) \
SCAN_IF(NAME); \
TYPE skey, smask; \
memset(&skey, 0, sizeof skey); \
memset(&smask, 0, sizeof smask); \
do { \
len = 0;
/* Init as fully-masked as mask will not be scanned. */
#define SCAN_BEGIN_FULLY_MASKED(NAME, TYPE) \
SCAN_IF(NAME); \
TYPE skey, smask; \
memset(&skey, 0, sizeof skey); \
memset(&smask, 0xff, sizeof smask); \
do { \
len = 0;
/* VLAN needs special initialization. */
#define SCAN_BEGIN_INIT(NAME, TYPE, KEY_INIT, MASK_INIT) \
SCAN_IF(NAME); \
TYPE skey = KEY_INIT; \
TYPE smask = MASK_INIT; \
do { \
len = 0;
/* Scan unnamed entry as 'TYPE' */
#define SCAN_TYPE(TYPE, KEY, MASK) \
len = scan_##TYPE(s, KEY, MASK); \
if (len == 0) { \
return -EINVAL; \
} \
s += len
/* Scan named ('NAME') entry 'FIELD' as 'TYPE'. */
#define SCAN_FIELD(NAME, TYPE, FIELD) \
if (strncmp(s, NAME, strlen(NAME)) == 0) { \
s += strlen(NAME); \
SCAN_TYPE(TYPE, &skey.FIELD, mask ? &smask.FIELD : NULL); \
continue; \
}
#define SCAN_FINISH() \
} while (*s++ == ',' && len != 0); \
if (s[-1] != ')') { \
return -EINVAL; \
}
#define SCAN_FINISH_SINGLE() \
} while (false); \
if (*s++ != ')') { \
return -EINVAL; \
}
/* Beginning of nested attribute. */
#define SCAN_BEGIN_NESTED(NAME, ATTR) \
SCAN_IF(NAME); \
size_t key_offset, mask_offset = 0; \
key_offset = nl_msg_start_nested(key, ATTR); \
if (mask) { \
mask_offset = nl_msg_start_nested(mask, ATTR); \
} \
do { \
len = 0;
#define SCAN_END_NESTED() \
SCAN_FINISH(); \
if (nl_attr_oversized(key->size - key_offset - NLA_HDRLEN)) { \
return -E2BIG; \
} \
nl_msg_end_nested(key, key_offset); \
if (mask) { \
nl_msg_end_nested(mask, mask_offset); \
} \
return s - start; \
}
#define SCAN_FIELD_NESTED__(NAME, TYPE, SCAN_AS, ATTR, FUNC) \
if (strncmp(s, NAME, strlen(NAME)) == 0) { \
TYPE skey, smask; \
memset(&skey, 0, sizeof skey); \
memset(&smask, 0xff, sizeof smask); \
s += strlen(NAME); \
SCAN_TYPE(SCAN_AS, &skey, &smask); \
SCAN_PUT(ATTR, FUNC); \
continue; \
}
#define SCAN_FIELD_NESTED(NAME, TYPE, SCAN_AS, ATTR) \
SCAN_FIELD_NESTED__(NAME, TYPE, SCAN_AS, ATTR, NULL)
#define SCAN_FIELD_NESTED_FUNC(NAME, TYPE, SCAN_AS, FUNC) \
SCAN_FIELD_NESTED__(NAME, TYPE, SCAN_AS, 0, FUNC)
#define SCAN_PUT(ATTR, FUNC) \
SCAN_PUT_ATTR(key, ATTR, skey, FUNC); \
if (mask) \
SCAN_PUT_ATTR(mask, ATTR, smask, FUNC); \
#define SCAN_END(ATTR) \
SCAN_FINISH(); \
SCAN_PUT(ATTR, NULL); \
return s - start; \
}
#define SCAN_BEGIN_ARRAY(NAME, TYPE, CNT) \
SCAN_IF(NAME); \
TYPE skey[CNT], smask[CNT]; \
memset(&skey, 0, sizeof skey); \
memset(&smask, 0, sizeof smask); \
int idx = 0, cnt = CNT; \
uint64_t fields = 0; \
do { \
int field = 0; \
len = 0;
/* Scan named ('NAME') entry 'FIELD' as 'TYPE'. */
#define SCAN_FIELD_ARRAY(NAME, TYPE, FIELD) \
if (strncmp(s, NAME, strlen(NAME)) == 0) { \
if (fields & (1UL << field)) { \
fields = 0; \
if (++idx == cnt) { \
break; \
} \
} \
s += strlen(NAME); \
SCAN_TYPE(TYPE, &skey[idx].FIELD, mask ? &smask[idx].FIELD : NULL); \
fields |= 1UL << field; \
continue; \
} \
field++;
#define SCAN_PUT_ATTR_ARRAY(BUF, ATTR, DATA, CNT) \
nl_msg_put_unspec(BUF, ATTR, &(DATA), sizeof (DATA)[0] * (CNT)); \
#define SCAN_PUT_ARRAY(ATTR, CNT) \
SCAN_PUT_ATTR_ARRAY(key, ATTR, skey, CNT); \
if (mask) { \
SCAN_PUT_ATTR_ARRAY(mask, ATTR, smask, CNT); \
}
#define SCAN_END_ARRAY(ATTR) \
SCAN_FINISH(); \
if (idx == cnt) { \
return -EINVAL; \
} \
SCAN_PUT_ARRAY(ATTR, idx + 1); \
return s - start; \
}
#define SCAN_END_SINGLE(ATTR) \
SCAN_FINISH_SINGLE(); \
SCAN_PUT(ATTR, NULL); \
return s - start; \
}
#define SCAN_SINGLE(NAME, TYPE, SCAN_AS, ATTR) \
SCAN_BEGIN(NAME, TYPE) { \
SCAN_TYPE(SCAN_AS, &skey, &smask); \
} SCAN_END_SINGLE(ATTR)
#define SCAN_SINGLE_FULLY_MASKED(NAME, TYPE, SCAN_AS, ATTR) \
SCAN_BEGIN_FULLY_MASKED(NAME, TYPE) { \
SCAN_TYPE(SCAN_AS, &skey, NULL); \
} SCAN_END_SINGLE(ATTR)
/* scan_port needs one extra argument. */
#define SCAN_SINGLE_PORT(NAME, TYPE, ATTR) \
SCAN_BEGIN(NAME, TYPE) { \
len = scan_port(s, &skey, &smask, \
context->port_names); \
if (len == 0) { \
return -EINVAL; \
} \
s += len; \
} SCAN_END_SINGLE(ATTR)
static int
parse_odp_nsh_key_mask_attr(const char *s, struct ofpbuf *key,
struct ofpbuf *mask)
{
if (strncmp(s, "nsh(", 4) == 0) {
const char *start = s;
int len;
struct ovs_key_nsh skey, smask;
uint32_t spi = 0, spi_mask = 0;
uint8_t si = 0, si_mask = 0;
s += 4;
memset(&skey, 0, sizeof skey);
memset(&smask, 0, sizeof smask);
do {
len = 0;
if (strncmp(s, "flags=", 6) == 0) {
s += 6;
len = scan_u8(s, &skey.flags, mask ? &smask.flags : NULL);
if (len == 0) {
return -EINVAL;
}
s += len;
continue;
}
if (strncmp(s, "mdtype=", 7) == 0) {
s += 7;
len = scan_u8(s, &skey.mdtype, mask ? &smask.mdtype : NULL);
if (len == 0) {
return -EINVAL;
}
s += len;
continue;
}
if (strncmp(s, "np=", 3) == 0) {
s += 3;
len = scan_u8(s, &skey.np, mask ? &smask.np : NULL);
if (len == 0) {
return -EINVAL;
}
s += len;
continue;
}
if (strncmp(s, "spi=", 4) == 0) {
s += 4;
len = scan_u32(s, &spi, mask ? &spi_mask : NULL);
if (len == 0) {
return -EINVAL;
}
s += len;
continue;
}
if (strncmp(s, "si=", 3) == 0) {
s += 3;
len = scan_u8(s, &si, mask ? &si_mask : NULL);
if (len == 0) {
return -EINVAL;
}
s += len;
continue;
}
if (strncmp(s, "c1=", 3) == 0) {
s += 3;
len = scan_be32(s, &skey.context[0],
mask ? &smask.context[0] : NULL);
if (len == 0) {
return -EINVAL;
}
s += len;
continue;
}
if (strncmp(s, "c2=", 3) == 0) {
s += 3;
len = scan_be32(s, &skey.context[1],
mask ? &smask.context[1] : NULL);
if (len == 0) {
return -EINVAL;
}
s += len;
continue;
}
if (strncmp(s, "c3=", 3) == 0) {
s += 3;
len = scan_be32(s, &skey.context[2],
mask ? &smask.context[2] : NULL);
if (len == 0) {
return -EINVAL;
}
s += len;
continue;
}
if (strncmp(s, "c4=", 3) == 0) {
s += 3;
len = scan_be32(s, &skey.context[3],
mask ? &smask.context[3] : NULL);
if (len == 0) {
return -EINVAL;
}
s += len;
continue;
}
} while (*s++ == ',' && len != 0);
if (s[-1] != ')') {
return -EINVAL;
}
skey.path_hdr = nsh_spi_si_to_path_hdr(spi, si);
smask.path_hdr = nsh_spi_si_to_path_hdr(spi_mask, si_mask);
nsh_key_to_attr(key, &skey, NULL, 0, false);
if (mask) {
nsh_key_to_attr(mask, &smask, NULL, 0, true);
}
return s - start;
}
return 0;
}
static int
parse_odp_key_mask_attr(struct parse_odp_context *context, const char *s,
struct ofpbuf *key, struct ofpbuf *mask)
{
int retval;
context->depth++;
if (context->depth == MAX_ODP_NESTED) {
retval = -EINVAL;
} else {
retval = parse_odp_key_mask_attr__(context, s, key, mask);
}
context->depth--;
return retval;
}
static int
parse_odp_key_mask_attr__(struct parse_odp_context *context, const char *s,
struct ofpbuf *key, struct ofpbuf *mask)
{
SCAN_SINGLE("skb_priority(", uint32_t, u32, OVS_KEY_ATTR_PRIORITY);
SCAN_SINGLE("skb_mark(", uint32_t, u32, OVS_KEY_ATTR_SKB_MARK);
SCAN_SINGLE_FULLY_MASKED("recirc_id(", uint32_t, u32,
OVS_KEY_ATTR_RECIRC_ID);
SCAN_SINGLE("dp_hash(", uint32_t, u32, OVS_KEY_ATTR_DP_HASH);
SCAN_SINGLE("ct_state(", uint32_t, ct_state, OVS_KEY_ATTR_CT_STATE);
SCAN_SINGLE("ct_zone(", uint16_t, u16, OVS_KEY_ATTR_CT_ZONE);
SCAN_SINGLE("ct_mark(", uint32_t, u32, OVS_KEY_ATTR_CT_MARK);
SCAN_SINGLE("ct_label(", ovs_u128, u128, OVS_KEY_ATTR_CT_LABELS);
SCAN_BEGIN("ct_tuple4(", struct ovs_key_ct_tuple_ipv4) {
SCAN_FIELD("src=", ipv4, ipv4_src);
SCAN_FIELD("dst=", ipv4, ipv4_dst);
SCAN_FIELD("proto=", u8, ipv4_proto);
SCAN_FIELD("tp_src=", be16, src_port);
SCAN_FIELD("tp_dst=", be16, dst_port);
} SCAN_END(OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4);
SCAN_BEGIN("ct_tuple6(", struct ovs_key_ct_tuple_ipv6) {
SCAN_FIELD("src=", in6_addr, ipv6_src);
SCAN_FIELD("dst=", in6_addr, ipv6_dst);
SCAN_FIELD("proto=", u8, ipv6_proto);
SCAN_FIELD("tp_src=", be16, src_port);
SCAN_FIELD("tp_dst=", be16, dst_port);
} SCAN_END(OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6);
SCAN_BEGIN_NESTED("tunnel(", OVS_KEY_ATTR_TUNNEL) {
SCAN_FIELD_NESTED("tun_id=", ovs_be64, be64, OVS_TUNNEL_KEY_ATTR_ID);
SCAN_FIELD_NESTED("src=", ovs_be32, ipv4, OVS_TUNNEL_KEY_ATTR_IPV4_SRC);
SCAN_FIELD_NESTED("dst=", ovs_be32, ipv4, OVS_TUNNEL_KEY_ATTR_IPV4_DST);
SCAN_FIELD_NESTED("ipv6_src=", struct in6_addr, in6_addr, OVS_TUNNEL_KEY_ATTR_IPV6_SRC);
SCAN_FIELD_NESTED("ipv6_dst=", struct in6_addr, in6_addr, OVS_TUNNEL_KEY_ATTR_IPV6_DST);
SCAN_FIELD_NESTED("tos=", uint8_t, u8, OVS_TUNNEL_KEY_ATTR_TOS);
SCAN_FIELD_NESTED("ttl=", uint8_t, u8, OVS_TUNNEL_KEY_ATTR_TTL);
SCAN_FIELD_NESTED("tp_src=", ovs_be16, be16, OVS_TUNNEL_KEY_ATTR_TP_SRC);
SCAN_FIELD_NESTED("tp_dst=", ovs_be16, be16, OVS_TUNNEL_KEY_ATTR_TP_DST);
SCAN_FIELD_NESTED_FUNC("erspan(", struct erspan_metadata, erspan_metadata,
erspan_to_attr);
SCAN_FIELD_NESTED_FUNC("vxlan(gbp(", uint32_t, vxlan_gbp, vxlan_gbp_to_attr);
SCAN_FIELD_NESTED_FUNC("geneve(", struct geneve_scan, geneve,
geneve_to_attr);
SCAN_FIELD_NESTED_FUNC("gtpu(", struct gtpu_metadata, gtpu_metadata,
gtpu_to_attr);
SCAN_FIELD_NESTED_FUNC("flags(", uint16_t, tun_flags, tun_flags_to_attr);
} SCAN_END_NESTED();
SCAN_SINGLE_PORT("in_port(", uint32_t, OVS_KEY_ATTR_IN_PORT);
SCAN_BEGIN("eth(", struct ovs_key_ethernet) {
SCAN_FIELD("src=", eth, eth_src);
SCAN_FIELD("dst=", eth, eth_dst);
} SCAN_END(OVS_KEY_ATTR_ETHERNET);
SCAN_BEGIN_INIT("vlan(", struct ovs_key_vlan__,
{ htons(VLAN_CFI) }, { htons(VLAN_CFI) }) {
SCAN_FIELD("vid=", vid, tci);
SCAN_FIELD("pcp=", pcp, tci);
SCAN_FIELD("cfi=", cfi, tci);
} SCAN_END(OVS_KEY_ATTR_VLAN);
SCAN_SINGLE("eth_type(", ovs_be16, be16, OVS_KEY_ATTR_ETHERTYPE);
SCAN_BEGIN_ARRAY("mpls(", struct ovs_key_mpls, FLOW_MAX_MPLS_LABELS) {
SCAN_FIELD_ARRAY("label=", mpls_label, mpls_lse);
SCAN_FIELD_ARRAY("tc=", mpls_tc, mpls_lse);
SCAN_FIELD_ARRAY("ttl=", mpls_ttl, mpls_lse);
SCAN_FIELD_ARRAY("bos=", mpls_bos, mpls_lse);
} SCAN_END_ARRAY(OVS_KEY_ATTR_MPLS);
SCAN_BEGIN("ipv4(", struct ovs_key_ipv4) {
SCAN_FIELD("src=", ipv4, ipv4_src);
SCAN_FIELD("dst=", ipv4, ipv4_dst);
SCAN_FIELD("proto=", u8, ipv4_proto);
SCAN_FIELD("tos=", u8, ipv4_tos);
SCAN_FIELD("ttl=", u8, ipv4_ttl);
SCAN_FIELD("frag=", frag, ipv4_frag);
} SCAN_END(OVS_KEY_ATTR_IPV4);
SCAN_BEGIN("ipv6(", struct ovs_key_ipv6) {
SCAN_FIELD("src=", in6_addr, ipv6_src);
SCAN_FIELD("dst=", in6_addr, ipv6_dst);
SCAN_FIELD("label=", ipv6_label, ipv6_label);
SCAN_FIELD("proto=", u8, ipv6_proto);
SCAN_FIELD("tclass=", u8, ipv6_tclass);
SCAN_FIELD("hlimit=", u8, ipv6_hlimit);
SCAN_FIELD("frag=", frag, ipv6_frag);
} SCAN_END(OVS_KEY_ATTR_IPV6);
SCAN_BEGIN("tcp(", struct ovs_key_tcp) {
SCAN_FIELD("src=", be16, tcp_src);
SCAN_FIELD("dst=", be16, tcp_dst);
} SCAN_END(OVS_KEY_ATTR_TCP);
SCAN_SINGLE("tcp_flags(", ovs_be16, tcp_flags, OVS_KEY_ATTR_TCP_FLAGS);
SCAN_BEGIN("udp(", struct ovs_key_udp) {
SCAN_FIELD("src=", be16, udp_src);
SCAN_FIELD("dst=", be16, udp_dst);
} SCAN_END(OVS_KEY_ATTR_UDP);
SCAN_BEGIN("sctp(", struct ovs_key_sctp) {
SCAN_FIELD("src=", be16, sctp_src);
SCAN_FIELD("dst=", be16, sctp_dst);
} SCAN_END(OVS_KEY_ATTR_SCTP);
SCAN_BEGIN("icmp(", struct ovs_key_icmp) {
SCAN_FIELD("type=", u8, icmp_type);
SCAN_FIELD("code=", u8, icmp_code);
} SCAN_END(OVS_KEY_ATTR_ICMP);
SCAN_BEGIN("icmpv6(", struct ovs_key_icmpv6) {
SCAN_FIELD("type=", u8, icmpv6_type);
SCAN_FIELD("code=", u8, icmpv6_code);
} SCAN_END(OVS_KEY_ATTR_ICMPV6);
SCAN_BEGIN("arp(", struct ovs_key_arp) {
SCAN_FIELD("sip=", ipv4, arp_sip);
SCAN_FIELD("tip=", ipv4, arp_tip);
SCAN_FIELD("op=", be16, arp_op);
SCAN_FIELD("sha=", eth, arp_sha);
SCAN_FIELD("tha=", eth, arp_tha);
} SCAN_END(OVS_KEY_ATTR_ARP);
SCAN_BEGIN("nd(", struct ovs_key_nd) {
SCAN_FIELD("target=", in6_addr, nd_target);
SCAN_FIELD("sll=", eth, nd_sll);
SCAN_FIELD("tll=", eth, nd_tll);
} SCAN_END(OVS_KEY_ATTR_ND);
SCAN_BEGIN("nd_ext(", struct ovs_key_nd_extensions) {
SCAN_FIELD("nd_reserved=", be32, nd_reserved);
SCAN_FIELD("nd_options_type=", u8, nd_options_type);
} SCAN_END(OVS_KEY_ATTR_ND_EXTENSIONS);
struct packet_type {
ovs_be16 ns;
ovs_be16 id;
};
SCAN_BEGIN("packet_type(", struct packet_type) {
SCAN_FIELD("ns=", be16, ns);
SCAN_FIELD("id=", be16, id);
} SCAN_END(OVS_KEY_ATTR_PACKET_TYPE);
/* nsh is nested, it needs special process */
int ret = parse_odp_nsh_key_mask_attr(s, key, mask);
if (ret < 0) {
return ret;
} else {
s += ret;
}
/* Encap open-coded. */
if (!strncmp(s, "encap(", 6)) {
const char *start = s;
size_t encap, encap_mask = 0;
encap = nl_msg_start_nested(key, OVS_KEY_ATTR_ENCAP);
if (mask) {
encap_mask = nl_msg_start_nested(mask, OVS_KEY_ATTR_ENCAP);
}
s += 6;
for (;;) {
int retval;
s += strspn(s, delimiters);
if (!*s) {
return -EINVAL;
} else if (*s == ')') {
break;
}
retval = parse_odp_key_mask_attr(context, s, key, mask);
if (retval < 0) {
return retval;
}
if (nl_attr_oversized(key->size - encap - NLA_HDRLEN)) {
return -E2BIG;
}
s += retval;
}
s++;
nl_msg_end_nested(key, encap);
if (mask) {
nl_msg_end_nested(mask, encap_mask);
}
return s - start;
}
return -EINVAL;
}
/* Parses the string representation of a datapath flow key, in the format
* output by odp_flow_key_format(). Returns 0 if successful, otherwise a
* positive errno value. On success, stores NULL into '*errorp' and the flow
* key is appended to 'key' as a series of Netlink attributes. On failure,
* stores a malloc()'d error message in '*errorp' without changing the data in
* 'key'. Either way, 'key''s data might be reallocated.
*
* If 'port_names' is nonnull, it points to an simap that maps from a port name
* to a port number. (Port names may be used instead of port numbers in
* in_port.)
*
* On success, the attributes appended to 'key' are individually syntactically
* valid, but they may not be valid as a sequence. 'key' might, for example,
* have duplicated keys. odp_flow_key_to_flow() will detect those errors. */
int
odp_flow_from_string(const char *s, const struct simap *port_names,
struct ofpbuf *key, struct ofpbuf *mask,
char **errorp)
{
if (errorp) {
*errorp = NULL;
}
const size_t old_size = key->size;
struct parse_odp_context context = (struct parse_odp_context) {
.port_names = port_names,
};
for (;;) {
int retval;
s += strspn(s, delimiters);
if (!*s) {
return 0;
}
/* Skip UFID. */
ovs_u128 ufid;
retval = odp_ufid_from_string(s, &ufid);
if (retval < 0) {
if (errorp) {
*errorp = xasprintf("syntax error at %s", s);
}
key->size = old_size;
return -retval;
} else if (retval > 0) {
s += retval;
s += s[0] == ' ' ? 1 : 0;
}
retval = parse_odp_key_mask_attr(&context, s, key, mask);
if (retval >= 0) {
if (nl_attr_oversized(key->size - NLA_HDRLEN)) {
retval = -E2BIG;
} else if (mask && nl_attr_oversized(mask->size - NLA_HDRLEN)) {
retval = -E2BIG;
}
}
if (retval < 0) {
if (errorp) {
*errorp = xasprintf("syntax error at %s", s);
}
key->size = old_size;
return -retval;
}
s += retval;
}
return 0;
}
static uint8_t
ovs_to_odp_frag(uint8_t nw_frag, bool is_mask)
{
if (is_mask) {
/* Netlink interface 'enum ovs_frag_type' is an 8-bit enumeration type,
* not a set of flags or bitfields. Hence, if the struct flow nw_frag
* mask, which is a set of bits, has the FLOW_NW_FRAG_ANY as zero, we
* must use a zero mask for the netlink frag field, and all ones mask
* otherwise. */
return (nw_frag & FLOW_NW_FRAG_ANY) ? UINT8_MAX : 0;
}
return !(nw_frag & FLOW_NW_FRAG_ANY) ? OVS_FRAG_TYPE_NONE
: nw_frag & FLOW_NW_FRAG_LATER ? OVS_FRAG_TYPE_LATER
: OVS_FRAG_TYPE_FIRST;
}
static void get_ethernet_key(const struct flow *, struct ovs_key_ethernet *);
static void put_ethernet_key(const struct ovs_key_ethernet *, struct flow *);
static void get_ipv4_key(const struct flow *, struct ovs_key_ipv4 *,
bool is_mask);
static void put_ipv4_key(const struct ovs_key_ipv4 *, struct flow *,
bool is_mask);
static void get_ipv6_key(const struct flow *, struct ovs_key_ipv6 *,
bool is_mask);
static void put_ipv6_key(const struct ovs_key_ipv6 *, struct flow *,
bool is_mask);
static void get_arp_key(const struct flow *, struct ovs_key_arp *);
static void put_arp_key(const struct ovs_key_arp *, struct flow *);
static void get_nd_key(const struct flow *, struct ovs_key_nd *);
static void put_nd_key(const struct ovs_key_nd *, struct flow *);
static void get_nsh_key(const struct flow *flow, struct ovs_key_nsh *nsh,
bool is_mask);
static void put_nsh_key(const struct ovs_key_nsh *nsh, struct flow *flow,
bool is_mask);
/* These share the same layout. */
union ovs_key_tp {
struct ovs_key_tcp tcp;
struct ovs_key_udp udp;
struct ovs_key_sctp sctp;
};
static void get_tp_key(const struct flow *, union ovs_key_tp *);
static void put_tp_key(const union ovs_key_tp *, struct flow *);
static void
odp_flow_key_from_flow__(const struct odp_flow_key_parms *parms,
bool export_mask, struct ofpbuf *buf)
{
/* New "struct flow" fields that are visible to the datapath (including all
* data fields) should be translated into equivalent datapath flow fields
* here (you will have to add a OVS_KEY_ATTR_* for them). */
BUILD_ASSERT_DECL(FLOW_WC_SEQ == 42);
struct ovs_key_ethernet *eth_key;
size_t encap[FLOW_MAX_VLAN_HEADERS] = {0};
size_t max_vlans;
const struct flow *flow = parms->flow;
const struct flow *mask = parms->mask;
const struct flow *data = export_mask ? mask : flow;
if (parms->support.recirc) {
nl_msg_put_u32(buf, OVS_KEY_ATTR_RECIRC_ID, data->recirc_id);
nl_msg_put_u32(buf, OVS_KEY_ATTR_DP_HASH, data->dp_hash);
}
nl_msg_put_u32(buf, OVS_KEY_ATTR_PRIORITY, data->skb_priority);
if (flow_tnl_dst_is_set(&flow->tunnel) ||
flow_tnl_src_is_set(&flow->tunnel) || export_mask) {
tun_key_to_attr(buf, &data->tunnel, &parms->flow->tunnel,
parms->key_buf, NULL);
}
/* Add an ingress port attribute if this is a mask or 'in_port.odp_port'
* is not the magical value "ODPP_NONE". */
if (export_mask || flow->in_port.odp_port != ODPP_NONE) {
nl_msg_put_odp_port(buf, OVS_KEY_ATTR_IN_PORT, data->in_port.odp_port);
}
nl_msg_put_u32(buf, OVS_KEY_ATTR_SKB_MARK, data->pkt_mark);
if (parms->support.ct_state) {
nl_msg_put_u32(buf, OVS_KEY_ATTR_CT_STATE,
ovs_to_odp_ct_state(data->ct_state));
}
if (parms->support.ct_zone) {
nl_msg_put_u16(buf, OVS_KEY_ATTR_CT_ZONE, data->ct_zone);
}
if (parms->support.ct_mark) {
nl_msg_put_u32(buf, OVS_KEY_ATTR_CT_MARK, data->ct_mark);
}
if (parms->support.ct_label) {
nl_msg_put_unspec(buf, OVS_KEY_ATTR_CT_LABELS, &data->ct_label,
sizeof(data->ct_label));
}
if (flow->ct_nw_proto) {
if (parms->support.ct_orig_tuple
&& flow->dl_type == htons(ETH_TYPE_IP)) {
struct ovs_key_ct_tuple_ipv4 *ct;
/* 'struct ovs_key_ct_tuple_ipv4' has padding, clear it. */
ct = nl_msg_put_unspec_zero(buf, OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4,
sizeof *ct);
ct->ipv4_src = data->ct_nw_src;
ct->ipv4_dst = data->ct_nw_dst;
ct->src_port = data->ct_tp_src;
ct->dst_port = data->ct_tp_dst;
ct->ipv4_proto = data->ct_nw_proto;
} else if (parms->support.ct_orig_tuple6
&& flow->dl_type == htons(ETH_TYPE_IPV6)) {
struct ovs_key_ct_tuple_ipv6 *ct;
/* 'struct ovs_key_ct_tuple_ipv6' has padding, clear it. */
ct = nl_msg_put_unspec_zero(buf, OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6,
sizeof *ct);
ct->ipv6_src = data->ct_ipv6_src;
ct->ipv6_dst = data->ct_ipv6_dst;
ct->src_port = data->ct_tp_src;
ct->dst_port = data->ct_tp_dst;
ct->ipv6_proto = data->ct_nw_proto;
}
}
nl_msg_put_be32(buf, OVS_KEY_ATTR_PACKET_TYPE, data->packet_type);
if (OVS_UNLIKELY(parms->probe)) {
max_vlans = FLOW_MAX_VLAN_HEADERS;
} else {
max_vlans = MIN(parms->support.max_vlan_headers, flow_vlan_limit);
}
/* Conditionally add L2 attributes for Ethernet packets */
if (flow->packet_type == htonl(PT_ETH)) {
eth_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_ETHERNET,
sizeof *eth_key);
get_ethernet_key(data, eth_key);
for (int encaps = 0; encaps < max_vlans; encaps++) {
ovs_be16 tpid = flow->vlans[encaps].tpid;
if (flow->vlans[encaps].tci == htons(0)) {
if (eth_type_vlan(flow->dl_type)) {
/* If VLAN was truncated the tpid is in dl_type */
tpid = flow->dl_type;
} else {
break;
}
}
if (export_mask) {
nl_msg_put_be16(buf, OVS_KEY_ATTR_ETHERTYPE, OVS_BE16_MAX);
} else {
nl_msg_put_be16(buf, OVS_KEY_ATTR_ETHERTYPE, tpid);
}
nl_msg_put_be16(buf, OVS_KEY_ATTR_VLAN, data->vlans[encaps].tci);
encap[encaps] = nl_msg_start_nested(buf, OVS_KEY_ATTR_ENCAP);
if (flow->vlans[encaps].tci == htons(0)) {
goto unencap;
}
}
}
if (ntohs(flow->dl_type) < ETH_TYPE_MIN) {
/* For backwards compatibility with kernels that don't support
* wildcarding, the following convention is used to encode the
* OVS_KEY_ATTR_ETHERTYPE for key and mask:
*
* key mask matches
* -------- -------- -------
* >0x5ff 0xffff Specified Ethernet II Ethertype.
* >0x5ff 0 Any Ethernet II or non-Ethernet II frame.
* <none> 0xffff Any non-Ethernet II frame (except valid
* 802.3 SNAP packet with valid eth_type).
*/
if (export_mask) {
nl_msg_put_be16(buf, OVS_KEY_ATTR_ETHERTYPE, OVS_BE16_MAX);
}
goto unencap;
}
nl_msg_put_be16(buf, OVS_KEY_ATTR_ETHERTYPE, data->dl_type);
if (eth_type_vlan(flow->dl_type)) {
goto unencap;
}
if (flow->dl_type == htons(ETH_TYPE_IP)) {
struct ovs_key_ipv4 *ipv4_key;
ipv4_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_IPV4,
sizeof *ipv4_key);
get_ipv4_key(data, ipv4_key, export_mask);
} else if (flow->dl_type == htons(ETH_TYPE_IPV6)) {
struct ovs_key_ipv6 *ipv6_key;
ipv6_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_IPV6,
sizeof *ipv6_key);
get_ipv6_key(data, ipv6_key, export_mask);
} else if (flow->dl_type == htons(ETH_TYPE_ARP) ||
flow->dl_type == htons(ETH_TYPE_RARP)) {
struct ovs_key_arp *arp_key;
arp_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_ARP,
sizeof *arp_key);
get_arp_key(data, arp_key);
} else if (eth_type_mpls(flow->dl_type)) {
struct ovs_key_mpls *mpls_key;
int i, n;
n = flow_count_mpls_labels(flow, NULL);
if (export_mask) {
n = MIN(n, parms->support.max_mpls_depth);
}
mpls_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_MPLS,
n * sizeof *mpls_key);
for (i = 0; i < n; i++) {
mpls_key[i].mpls_lse = data->mpls_lse[i];
}
} else if (flow->dl_type == htons(ETH_TYPE_NSH)) {
nsh_key_to_attr(buf, &data->nsh, NULL, 0, export_mask);
}
if (is_ip_any(flow) && !(flow->nw_frag & FLOW_NW_FRAG_LATER)) {
if (flow->nw_proto == IPPROTO_TCP) {
union ovs_key_tp *tcp_key;
tcp_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_TCP,
sizeof *tcp_key);
get_tp_key(data, tcp_key);
if (data->tcp_flags || (mask && mask->tcp_flags)) {
nl_msg_put_be16(buf, OVS_KEY_ATTR_TCP_FLAGS, data->tcp_flags);
}
} else if (flow->nw_proto == IPPROTO_UDP) {
union ovs_key_tp *udp_key;
udp_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_UDP,
sizeof *udp_key);
get_tp_key(data, udp_key);
} else if (flow->nw_proto == IPPROTO_SCTP) {
union ovs_key_tp *sctp_key;
sctp_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_SCTP,
sizeof *sctp_key);
get_tp_key(data, sctp_key);
} else if (flow->dl_type == htons(ETH_TYPE_IP)
&& flow->nw_proto == IPPROTO_ICMP) {
struct ovs_key_icmp *icmp_key;
icmp_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_ICMP,
sizeof *icmp_key);
icmp_key->icmp_type = ntohs(data->tp_src);
icmp_key->icmp_code = ntohs(data->tp_dst);
} else if (flow->dl_type == htons(ETH_TYPE_IPV6)
&& flow->nw_proto == IPPROTO_ICMPV6) {
struct ovs_key_icmpv6 *icmpv6_key;
icmpv6_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_ICMPV6,
sizeof *icmpv6_key);
icmpv6_key->icmpv6_type = ntohs(data->tp_src);
icmpv6_key->icmpv6_code = ntohs(data->tp_dst);
if (is_nd(flow, NULL)
/* Even though 'tp_src' is 16 bits wide, ICMP type is 8 bits
* wide. Therefore, an exact match looks like htons(0xff),
* not htons(0xffff). See xlate_wc_finish() for details. */
&& (!export_mask || data->tp_src == htons(0xff))) {
struct ovs_key_nd *nd_key;
nd_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_ND,
sizeof *nd_key);
nd_key->nd_target = data->nd_target;
nd_key->nd_sll = data->arp_sha;
nd_key->nd_tll = data->arp_tha;
/* Add ND Extensions Attr only if supported and reserved field
* or options type is set. */
if (parms->support.nd_ext) {
struct ovs_key_nd_extensions *nd_ext_key;
if (data->igmp_group_ip4 != 0 || data->tcp_flags != 0) {
/* 'struct ovs_key_nd_extensions' has padding,
* clear it. */
nd_ext_key = nl_msg_put_unspec_zero(buf,
OVS_KEY_ATTR_ND_EXTENSIONS,
sizeof *nd_ext_key);
nd_ext_key->nd_reserved = data->igmp_group_ip4;
nd_ext_key->nd_options_type = ntohs(data->tcp_flags);
}
}
}
}
}
unencap:
for (int encaps = max_vlans - 1; encaps >= 0; encaps--) {
if (encap[encaps]) {
nl_msg_end_nested(buf, encap[encaps]);
}
}
}
/* Appends a representation of 'flow' as OVS_KEY_ATTR_* attributes to 'buf'.
*
* 'buf' must have at least ODPUTIL_FLOW_KEY_BYTES bytes of space, or be
* capable of being expanded to allow for that much space. */
void
odp_flow_key_from_flow(const struct odp_flow_key_parms *parms,
struct ofpbuf *buf)
{
odp_flow_key_from_flow__(parms, false, buf);
}
/* Appends a representation of 'mask' as OVS_KEY_ATTR_* attributes to
* 'buf'.
*
* 'buf' must have at least ODPUTIL_FLOW_KEY_BYTES bytes of space, or be
* capable of being expanded to allow for that much space. */
void
odp_flow_key_from_mask(const struct odp_flow_key_parms *parms,
struct ofpbuf *buf)
{
odp_flow_key_from_flow__(parms, true, buf);
}
/* Generate ODP flow key from the given packet metadata */
void
odp_key_from_dp_packet(struct ofpbuf *buf, const struct dp_packet *packet)
{
const struct pkt_metadata *md = &packet->md;
nl_msg_put_u32(buf, OVS_KEY_ATTR_PRIORITY, md->skb_priority);
if (md->dp_hash) {
nl_msg_put_u32(buf, OVS_KEY_ATTR_DP_HASH, md->dp_hash);
}
if (flow_tnl_dst_is_set(&md->tunnel)) {
tun_key_to_attr(buf, &md->tunnel, &md->tunnel, NULL, NULL);
}
nl_msg_put_u32(buf, OVS_KEY_ATTR_SKB_MARK, md->pkt_mark);
if (md->ct_state) {
nl_msg_put_u32(buf, OVS_KEY_ATTR_CT_STATE,
ovs_to_odp_ct_state(md->ct_state));
if (md->ct_zone) {
nl_msg_put_u16(buf, OVS_KEY_ATTR_CT_ZONE, md->ct_zone);
}
if (md->ct_mark) {
nl_msg_put_u32(buf, OVS_KEY_ATTR_CT_MARK, md->ct_mark);
}
if (!ovs_u128_is_zero(md->ct_label)) {
nl_msg_put_unspec(buf, OVS_KEY_ATTR_CT_LABELS, &md->ct_label,
sizeof(md->ct_label));
}
if (md->ct_orig_tuple_ipv6) {
if (md->ct_orig_tuple.ipv6.ipv6_proto) {
nl_msg_put_unspec(buf, OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6,
&md->ct_orig_tuple.ipv6,
sizeof md->ct_orig_tuple.ipv6);
}
} else {
if (md->ct_orig_tuple.ipv4.ipv4_proto) {
nl_msg_put_unspec(buf, OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4,
&md->ct_orig_tuple.ipv4,
sizeof md->ct_orig_tuple.ipv4);
}
}
}
/* Add an ingress port attribute if 'odp_in_port' is not the magical
* value "ODPP_NONE". */
if (md->in_port.odp_port != ODPP_NONE) {
nl_msg_put_odp_port(buf, OVS_KEY_ATTR_IN_PORT, md->in_port.odp_port);
}
/* Add OVS_KEY_ATTR_ETHERNET for non-Ethernet packets */
if (pt_ns(packet->packet_type) == OFPHTN_ETHERTYPE) {
nl_msg_put_be16(buf, OVS_KEY_ATTR_ETHERTYPE,
pt_ns_type_be(packet->packet_type));
}
}
/* Generate packet metadata from the given ODP flow key. */
void
odp_key_to_dp_packet(const struct nlattr *key, size_t key_len,
struct dp_packet *packet)
{
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
const struct nlattr *nla;
struct pkt_metadata *md = &packet->md;
ovs_be32 packet_type = htonl(PT_UNKNOWN);
ovs_be16 ethertype = 0;
size_t left;
pkt_metadata_init(md, ODPP_NONE);
NL_ATTR_FOR_EACH (nla, left, key, key_len) {
enum ovs_key_attr type = nl_attr_type(nla);
size_t len = nl_attr_get_size(nla);
int expected_len = odp_key_attr_len(ovs_flow_key_attr_lens,
OVS_KEY_ATTR_MAX, type);
if (len != expected_len && expected_len >= 0) {
continue;
}
switch (type) {
case OVS_KEY_ATTR_RECIRC_ID:
md->recirc_id = nl_attr_get_u32(nla);
break;
case OVS_KEY_ATTR_DP_HASH:
md->dp_hash = nl_attr_get_u32(nla);
break;
case OVS_KEY_ATTR_PRIORITY:
md->skb_priority = nl_attr_get_u32(nla);
break;
case OVS_KEY_ATTR_SKB_MARK:
md->pkt_mark = nl_attr_get_u32(nla);
break;
case OVS_KEY_ATTR_CT_STATE:
md->ct_state = odp_to_ovs_ct_state(nl_attr_get_u32(nla));
break;
case OVS_KEY_ATTR_CT_ZONE:
md->ct_zone = nl_attr_get_u16(nla);
break;
case OVS_KEY_ATTR_CT_MARK:
md->ct_mark = nl_attr_get_u32(nla);
break;
case OVS_KEY_ATTR_CT_LABELS: {
md->ct_label = nl_attr_get_u128(nla);
break;
}
case OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4: {
const struct ovs_key_ct_tuple_ipv4 *ct = nl_attr_get(nla);
md->ct_orig_tuple.ipv4 = *ct;
md->ct_orig_tuple_ipv6 = false;
break;
}
case OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6: {
const struct ovs_key_ct_tuple_ipv6 *ct = nl_attr_get(nla);
md->ct_orig_tuple.ipv6 = *ct;
md->ct_orig_tuple_ipv6 = true;
break;
}
case OVS_KEY_ATTR_TUNNEL: {
enum odp_key_fitness res;
res = odp_tun_key_from_attr(nla, &md->tunnel, NULL);
if (res == ODP_FIT_ERROR) {
memset(&md->tunnel, 0, sizeof md->tunnel);
}
break;
}
case OVS_KEY_ATTR_IN_PORT:
md->in_port.odp_port = nl_attr_get_odp_port(nla);
break;
case OVS_KEY_ATTR_ETHERNET:
/* Presence of OVS_KEY_ATTR_ETHERNET indicates Ethernet packet. */
packet_type = htonl(PT_ETH);
break;
case OVS_KEY_ATTR_ETHERTYPE:
ethertype = nl_attr_get_be16(nla);
break;
case OVS_KEY_ATTR_UNSPEC:
case OVS_KEY_ATTR_ENCAP:
case OVS_KEY_ATTR_VLAN:
case OVS_KEY_ATTR_IPV4:
case OVS_KEY_ATTR_IPV6:
case OVS_KEY_ATTR_TCP:
case OVS_KEY_ATTR_UDP:
case OVS_KEY_ATTR_ICMP:
case OVS_KEY_ATTR_ICMPV6:
case OVS_KEY_ATTR_ARP:
case OVS_KEY_ATTR_ND:
case OVS_KEY_ATTR_ND_EXTENSIONS:
case OVS_KEY_ATTR_SCTP:
case OVS_KEY_ATTR_TCP_FLAGS:
case OVS_KEY_ATTR_MPLS:
case OVS_KEY_ATTR_PACKET_TYPE:
case OVS_KEY_ATTR_NSH:
case OVS_KEY_ATTR_TUNNEL_INFO:
case __OVS_KEY_ATTR_MAX:
default:
break;
}
}
if (packet_type == htonl(PT_ETH)) {
packet->packet_type = htonl(PT_ETH);
} else if (packet_type == htonl(PT_UNKNOWN) && ethertype != 0) {
packet->packet_type = PACKET_TYPE_BE(OFPHTN_ETHERTYPE,
ntohs(ethertype));
} else {
VLOG_ERR_RL(&rl, "Packet without ETHERTYPE. Unknown packet_type.");
}
}
/* Places the hash of the 'key_len' bytes starting at 'key' into '*hash'.
* Generated value has format of random UUID. */
void
odp_flow_key_hash(const void *key, size_t key_len, ovs_u128 *hash)
{
static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
static uint32_t secret;
if (ovsthread_once_start(&once)) {
secret = random_uint32();
ovsthread_once_done(&once);
}
hash_bytes128(key, key_len, secret, hash);
uuid_set_bits_v4((struct uuid *)hash);
}
static void
log_odp_key_attributes(struct vlog_rate_limit *rl, const char *title,
uint64_t attrs, int out_of_range_attr,
const struct nlattr *key, size_t key_len)
{
struct ds s;
int i;
if (VLOG_DROP_DBG(rl)) {
return;
}
ds_init(&s);
for (i = 0; i < 64; i++) {
if (attrs & (UINT64_C(1) << i)) {
char namebuf[OVS_KEY_ATTR_BUFSIZE];
ds_put_format(&s, " %s",
ovs_key_attr_to_string(i, namebuf, sizeof namebuf));
}
}
if (out_of_range_attr) {
ds_put_format(&s, " %d (and possibly others)", out_of_range_attr);
}
ds_put_cstr(&s, ": ");
odp_flow_key_format(key, key_len, &s);
VLOG_DBG("%s:%s", title, ds_cstr(&s));
ds_destroy(&s);
}
static uint8_t
odp_to_ovs_frag(uint8_t odp_frag, bool is_mask)
{
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
if (is_mask) {
return odp_frag ? FLOW_NW_FRAG_MASK : 0;
}
if (odp_frag > OVS_FRAG_TYPE_LATER) {
VLOG_ERR_RL(&rl, "invalid frag %"PRIu8" in flow key", odp_frag);
return 0xff; /* Error. */
}
return (odp_frag == OVS_FRAG_TYPE_NONE) ? 0
: (odp_frag == OVS_FRAG_TYPE_FIRST) ? FLOW_NW_FRAG_ANY
: FLOW_NW_FRAG_ANY | FLOW_NW_FRAG_LATER;
}
/* Parses the attributes in the 'key_len' bytes of 'key' into 'attrs', which
* must have OVS_KEY_ATTR_MAX + 1 elements. Stores each attribute in 'key'
* into the corresponding element of 'attrs'.
*
* Stores a bitmask of the attributes' indexes found in 'key' into
* '*present_attrsp'.
*
* If an attribute beyond OVS_KEY_ATTR_MAX is found, stores its attribute type
* (or one of them, if more than one) into '*out_of_range_attrp', otherwise 0.
*
* If 'errorp' is nonnull and the function returns false, stores a malloc()'d
* error message in '*errorp'. */
static bool
parse_flow_nlattrs(const struct nlattr *key, size_t key_len,
const struct nlattr *attrs[], uint64_t *present_attrsp,
int *out_of_range_attrp, char **errorp)
{
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(10, 10);
const struct nlattr *nla;
uint64_t present_attrs;
size_t left;
BUILD_ASSERT(OVS_KEY_ATTR_MAX < CHAR_BIT * sizeof present_attrs);
present_attrs = 0;
*out_of_range_attrp = 0;
NL_ATTR_FOR_EACH (nla, left, key, key_len) {
uint16_t type = nl_attr_type(nla);
size_t len = nl_attr_get_size(nla);
int expected_len = odp_key_attr_len(ovs_flow_key_attr_lens,
OVS_KEY_ATTR_MAX, type);
if (len != expected_len && expected_len >= 0) {
char namebuf[OVS_KEY_ATTR_BUFSIZE];
odp_parse_error(&rl, errorp, "attribute %s has length %"PRIuSIZE" "
"but should have length %d",
ovs_key_attr_to_string(type, namebuf,
sizeof namebuf),
len, expected_len);
return false;
}
if (type > OVS_KEY_ATTR_MAX) {
*out_of_range_attrp = type;
} else {
if (present_attrs & (UINT64_C(1) << type)) {
char namebuf[OVS_KEY_ATTR_BUFSIZE];
odp_parse_error(&rl, errorp,
"duplicate %s attribute in flow key",
ovs_key_attr_to_string(type, namebuf,
sizeof namebuf));
return false;
}
present_attrs |= UINT64_C(1) << type;
attrs[type] = nla;
}
}
if (left) {
odp_parse_error(&rl, errorp, "trailing garbage in flow key");
return false;
}
*present_attrsp = present_attrs;
return true;
}
static enum odp_key_fitness
check_expectations(uint64_t present_attrs, int out_of_range_attr,
uint64_t expected_attrs,
const struct nlattr *key, size_t key_len)
{
uint64_t missing_attrs;
uint64_t extra_attrs;
missing_attrs = expected_attrs & ~present_attrs;
if (missing_attrs) {
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(10, 10);
log_odp_key_attributes(&rl, "expected but not present",
missing_attrs, 0, key, key_len);
return ODP_FIT_TOO_LITTLE;
}
extra_attrs = present_attrs & ~expected_attrs;
if (extra_attrs || out_of_range_attr) {
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(10, 10);
log_odp_key_attributes(&rl, "present but not expected",
extra_attrs, out_of_range_attr, key, key_len);
return ODP_FIT_TOO_MUCH;
}
return ODP_FIT_PERFECT;
}
/* Initializes 'flow->dl_type' based on the attributes in 'attrs', in which the
* attributes in the bit-mask 'present_attrs' are present. Returns true if
* successful, false on failure.
*
* Sets 1-bits in '*expected_attrs' for the attributes in 'attrs' that were
* consulted. 'flow' is assumed to be a flow key unless 'src_flow' is nonnull,
* in which case 'flow' is a flow mask and 'src_flow' is its corresponding
* previously parsed flow key.
*
* If 'errorp' is nonnull and the function returns false, stores a malloc()'d
* error message in '*errorp'. */
static bool
parse_ethertype(const struct nlattr *attrs[OVS_KEY_ATTR_MAX + 1],
uint64_t present_attrs, uint64_t *expected_attrs,
struct flow *flow, const struct flow *src_flow,
char **errorp)
{
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
bool is_mask = flow != src_flow;
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ETHERTYPE)) {
flow->dl_type = nl_attr_get_be16(attrs[OVS_KEY_ATTR_ETHERTYPE]);
if (!is_mask && ntohs(flow->dl_type) < ETH_TYPE_MIN) {
odp_parse_error(&rl, errorp,
"invalid Ethertype %"PRIu16" in flow key",
ntohs(flow->dl_type));
return false;
}
if (is_mask && ntohs(src_flow->dl_type) < ETH_TYPE_MIN &&
flow->dl_type != htons(0xffff)) {
odp_parse_error(&rl, errorp, "can't bitwise match non-Ethernet II "
"\"Ethertype\" %#"PRIx16" (with mask %#"PRIx16")",
ntohs(src_flow->dl_type), ntohs(flow->dl_type));
return false;
}
*expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ETHERTYPE;
} else {
if (!is_mask) {
/* Default ethertype for well-known L3 packets. */
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_IPV4)) {
flow->dl_type = htons(ETH_TYPE_IP);
} else if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_IPV6)) {
flow->dl_type = htons(ETH_TYPE_IPV6);
} else if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_MPLS)) {
flow->dl_type = htons(ETH_TYPE_MPLS);
} else {
flow->dl_type = htons(FLOW_DL_TYPE_NONE);
}
} else if (src_flow->packet_type != htonl(PT_ETH)) {
/* dl_type is mandatory for non-Ethernet packets */
flow->dl_type = htons(0xffff);
} else if (ntohs(src_flow->dl_type) < ETH_TYPE_MIN) {
/* See comments in odp_flow_key_from_flow__(). */
odp_parse_error(&rl, errorp,
"mask expected for non-Ethernet II frame");
return false;
}
}
return true;
}
/* Initializes MPLS, L3, and L4 fields in 'flow' based on the attributes in
* 'attrs', in which the attributes in the bit-mask 'present_attrs' are
* present. The caller also indicates an out-of-range attribute
* 'out_of_range_attr' if one was present when parsing (if so, the fitness
* cannot be perfect).
*
* Sets 1-bits in '*expected_attrs' for the attributes in 'attrs' that were
* consulted. 'flow' is assumed to be a flow key unless 'src_flow' is nonnull,
* in which case 'flow' is a flow mask and 'src_flow' is its corresponding
* previously parsed flow key.
*
* Returns fitness based on any discrepancies between present and expected
* attributes, except that a 'need_check' of false overrides this.
*
* If 'errorp' is nonnull and the function returns false, stores a malloc()'d
* error message in '*errorp'. 'key' and 'key_len' are just used for error
* reporting in this case. */
static enum odp_key_fitness
parse_l2_5_onward(const struct nlattr *attrs[OVS_KEY_ATTR_MAX + 1],
uint64_t present_attrs, int out_of_range_attr,
uint64_t *expected_attrs, struct flow *flow,
const struct nlattr *key, size_t key_len,
const struct flow *src_flow, bool need_check, char **errorp)
{
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
bool is_mask = src_flow != flow;
const void *check_start = NULL;
size_t check_len = 0;
enum ovs_key_attr expected_bit = 0xff;
if (eth_type_mpls(src_flow->dl_type)) {
if (!is_mask || present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_MPLS)) {
*expected_attrs |= (UINT64_C(1) << OVS_KEY_ATTR_MPLS);
}
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_MPLS)) {
size_t size = nl_attr_get_size(attrs[OVS_KEY_ATTR_MPLS]);
const ovs_be32 *mpls_lse = nl_attr_get(attrs[OVS_KEY_ATTR_MPLS]);
int n = size / sizeof(ovs_be32);
int i;
if (!size || size % sizeof(ovs_be32)) {
odp_parse_error(&rl, errorp,
"MPLS LSEs have invalid length %"PRIuSIZE,
size);
return ODP_FIT_ERROR;
}
if (flow->mpls_lse[0] && flow->dl_type != htons(0xffff)) {
odp_parse_error(&rl, errorp,
"unexpected MPLS Ethertype mask %x"PRIx16,
ntohs(flow->dl_type));
return ODP_FIT_ERROR;
}
for (i = 0; i < n && i < FLOW_MAX_MPLS_LABELS; i++) {
flow->mpls_lse[i] = mpls_lse[i];
}
if (n > FLOW_MAX_MPLS_LABELS) {
return ODP_FIT_TOO_MUCH;
}
if (!is_mask) {
/* BOS may be set only in the innermost label. */
for (i = 0; i < n - 1; i++) {
if (flow->mpls_lse[i] & htonl(MPLS_BOS_MASK)) {
odp_parse_error(&rl, errorp,
"MPLS BOS set in non-innermost label");
return ODP_FIT_ERROR;
}
}
/* BOS must be set in the innermost label. */
if (n < FLOW_MAX_MPLS_LABELS
&& !(flow->mpls_lse[n - 1] & htonl(MPLS_BOS_MASK))) {
return ODP_FIT_TOO_LITTLE;
}
}
}
goto done;
} else if (src_flow->dl_type == htons(ETH_TYPE_IP)) {
if (!is_mask) {
*expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_IPV4;
}
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_IPV4)) {
const struct ovs_key_ipv4 *ipv4_key;
ipv4_key = nl_attr_get(attrs[OVS_KEY_ATTR_IPV4]);
put_ipv4_key(ipv4_key, flow, is_mask);
if (flow->nw_frag > FLOW_NW_FRAG_MASK) {
odp_parse_error(&rl, errorp, "OVS_KEY_ATTR_IPV4 has invalid "
"nw_frag %#"PRIx8, flow->nw_frag);
return ODP_FIT_ERROR;
}
if (is_mask) {
check_start = ipv4_key;
check_len = sizeof *ipv4_key;
expected_bit = OVS_KEY_ATTR_IPV4;
}
}
} else if (src_flow->dl_type == htons(ETH_TYPE_IPV6)) {
if (!is_mask) {
*expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_IPV6;
}
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_IPV6)) {
const struct ovs_key_ipv6 *ipv6_key;
ipv6_key = nl_attr_get(attrs[OVS_KEY_ATTR_IPV6]);
put_ipv6_key(ipv6_key, flow, is_mask);
if (flow->nw_frag > FLOW_NW_FRAG_MASK) {
odp_parse_error(&rl, errorp, "OVS_KEY_ATTR_IPV6 has invalid "
"nw_frag %#"PRIx8, flow->nw_frag);
return ODP_FIT_ERROR;
}
if (is_mask) {
check_start = ipv6_key;
check_len = sizeof *ipv6_key;
expected_bit = OVS_KEY_ATTR_IPV6;
}
}
} else if (src_flow->dl_type == htons(ETH_TYPE_ARP) ||
src_flow->dl_type == htons(ETH_TYPE_RARP)) {
if (!is_mask) {
*expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ARP;
}
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ARP)) {
const struct ovs_key_arp *arp_key;
arp_key = nl_attr_get(attrs[OVS_KEY_ATTR_ARP]);
if (!is_mask && (arp_key->arp_op & htons(0xff00))) {
odp_parse_error(&rl, errorp,
"unsupported ARP opcode %"PRIu16" in flow "
"key", ntohs(arp_key->arp_op));
return ODP_FIT_ERROR;
}
put_arp_key(arp_key, flow);
if (is_mask) {
check_start = arp_key;
check_len = sizeof *arp_key;
expected_bit = OVS_KEY_ATTR_ARP;
}
}
} else if (src_flow->dl_type == htons(ETH_TYPE_NSH)) {
if (!is_mask) {
*expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_NSH;
}
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_NSH)) {
if (odp_nsh_key_from_attr__(attrs[OVS_KEY_ATTR_NSH],
is_mask, &flow->nsh,
NULL, errorp) == ODP_FIT_ERROR) {
return ODP_FIT_ERROR;
}
if (is_mask) {
check_start = nl_attr_get(attrs[OVS_KEY_ATTR_NSH]);
check_len = nl_attr_get_size(attrs[OVS_KEY_ATTR_NSH]);
expected_bit = OVS_KEY_ATTR_NSH;
}
}
} else {
goto done;
}
if (check_len > 0) { /* Happens only when 'is_mask'. */
if (!is_all_zeros(check_start, check_len) &&
flow->dl_type != htons(0xffff)) {
odp_parse_error(&rl, errorp, "unexpected L3 matching with "
"masked Ethertype %#"PRIx16"/%#"PRIx16,
ntohs(src_flow->dl_type),
ntohs(flow->dl_type));
return ODP_FIT_ERROR;
} else {
*expected_attrs |= UINT64_C(1) << expected_bit;
}
}
expected_bit = OVS_KEY_ATTR_UNSPEC;
if (src_flow->nw_proto == IPPROTO_TCP
&& (src_flow->dl_type == htons(ETH_TYPE_IP) ||
src_flow->dl_type == htons(ETH_TYPE_IPV6))
&& !(src_flow->nw_frag & FLOW_NW_FRAG_LATER)) {
if (!is_mask) {
*expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_TCP;
}
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_TCP)) {
const union ovs_key_tp *tcp_key;
tcp_key = nl_attr_get(attrs[OVS_KEY_ATTR_TCP]);
put_tp_key(tcp_key, flow);
expected_bit = OVS_KEY_ATTR_TCP;
}
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_TCP_FLAGS)) {
*expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_TCP_FLAGS;
flow->tcp_flags = nl_attr_get_be16(attrs[OVS_KEY_ATTR_TCP_FLAGS]);
}
} else if (src_flow->nw_proto == IPPROTO_UDP
&& (src_flow->dl_type == htons(ETH_TYPE_IP) ||
src_flow->dl_type == htons(ETH_TYPE_IPV6))
&& !(src_flow->nw_frag & FLOW_NW_FRAG_LATER)) {
if (!is_mask) {
*expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_UDP;
}
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_UDP)) {
const union ovs_key_tp *udp_key;
udp_key = nl_attr_get(attrs[OVS_KEY_ATTR_UDP]);
put_tp_key(udp_key, flow);
expected_bit = OVS_KEY_ATTR_UDP;
}
} else if (src_flow->nw_proto == IPPROTO_SCTP
&& (src_flow->dl_type == htons(ETH_TYPE_IP) ||
src_flow->dl_type == htons(ETH_TYPE_IPV6))
&& !(src_flow->nw_frag & FLOW_NW_FRAG_LATER)) {
if (!is_mask) {
*expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_SCTP;
}
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_SCTP)) {
const union ovs_key_tp *sctp_key;
sctp_key = nl_attr_get(attrs[OVS_KEY_ATTR_SCTP]);
put_tp_key(sctp_key, flow);
expected_bit = OVS_KEY_ATTR_SCTP;
}
} else if (src_flow->nw_proto == IPPROTO_ICMP
&& src_flow->dl_type == htons(ETH_TYPE_IP)
&& !(src_flow->nw_frag & FLOW_NW_FRAG_LATER)) {
if (!is_mask) {
*expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ICMP;
}
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ICMP)) {
const struct ovs_key_icmp *icmp_key;
icmp_key = nl_attr_get(attrs[OVS_KEY_ATTR_ICMP]);
flow->tp_src = htons(icmp_key->icmp_type);
flow->tp_dst = htons(icmp_key->icmp_code);
expected_bit = OVS_KEY_ATTR_ICMP;
}
} else if (src_flow->nw_proto == IPPROTO_ICMPV6
&& src_flow->dl_type == htons(ETH_TYPE_IPV6)
&& !(src_flow->nw_frag & FLOW_NW_FRAG_LATER)) {
if (!is_mask) {
*expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ICMPV6;
}
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ICMPV6)) {
const struct ovs_key_icmpv6 *icmpv6_key;
icmpv6_key = nl_attr_get(attrs[OVS_KEY_ATTR_ICMPV6]);
flow->tp_src = htons(icmpv6_key->icmpv6_type);
flow->tp_dst = htons(icmpv6_key->icmpv6_code);
expected_bit = OVS_KEY_ATTR_ICMPV6;
if (is_nd(src_flow, NULL)) {
if (!is_mask) {
*expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ND;
}
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ND)) {
const struct ovs_key_nd *nd_key;
nd_key = nl_attr_get(attrs[OVS_KEY_ATTR_ND]);
flow->nd_target = nd_key->nd_target;
flow->arp_sha = nd_key->nd_sll;
flow->arp_tha = nd_key->nd_tll;
if (is_mask) {
/* Even though 'tp_src' is 16 bits wide, ICMP type
* is 8 bits wide. Therefore, an exact match looks
* like htons(0xff), not htons(0xffff). See
* xlate_wc_finish() for details. */
if (!is_all_zeros(nd_key, sizeof *nd_key) &&
flow->tp_src != htons(0xff)) {
odp_parse_error(&rl, errorp,
"ICMP src mask should be "
"(0xff) but is actually "
"(%#"PRIx16")",
ntohs(flow->tp_src));
return ODP_FIT_ERROR;
} else {
*expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ND;
}
}
}
if (present_attrs &
(UINT64_C(1) << OVS_KEY_ATTR_ND_EXTENSIONS)) {
const struct ovs_key_nd_extensions *nd_ext_key;
if (!is_mask) {
*expected_attrs |=
UINT64_C(1) << OVS_KEY_ATTR_ND_EXTENSIONS;
}
nd_ext_key =
nl_attr_get(attrs[OVS_KEY_ATTR_ND_EXTENSIONS]);
flow->igmp_group_ip4 = nd_ext_key->nd_reserved;
flow->tcp_flags = htons(nd_ext_key->nd_options_type);
if (is_mask) {
/* Even though 'tp_src' and 'tp_dst' are 16 bits wide,
* ICMP type and code are 8 bits wide. Therefore, an
* exact match looks like htons(0xff), not
* htons(0xffff). See xlate_wc_finish() for details.
* */
if (!is_all_zeros(nd_ext_key, sizeof *nd_ext_key) &&
(flow->tp_src != htons(0xff) ||
flow->tp_dst != htons(0xff))) {
return ODP_FIT_ERROR;
} else {
*expected_attrs |=
UINT64_C(1) << OVS_KEY_ATTR_ND_EXTENSIONS;
}
}
}
}
}
}
if (is_mask && expected_bit != OVS_KEY_ATTR_UNSPEC) {
if ((flow->tp_src || flow->tp_dst) && flow->nw_proto != 0xff) {
odp_parse_error(&rl, errorp, "flow matches on L4 ports but does "
"not define an L4 protocol");
return ODP_FIT_ERROR;
} else {
*expected_attrs |= UINT64_C(1) << expected_bit;
}
}
done:
return need_check ? check_expectations(present_attrs, out_of_range_attr,
*expected_attrs, key, key_len) : ODP_FIT_PERFECT;
}
/* Parse 802.1Q header then encapsulated L3 attributes. */
static enum odp_key_fitness
parse_8021q_onward(const struct nlattr *attrs[OVS_KEY_ATTR_MAX + 1],
uint64_t present_attrs, int out_of_range_attr,
uint64_t expected_attrs, struct flow *flow,
const struct nlattr *key, size_t key_len,
const struct flow *src_flow, char **errorp,
bool ignore_vlan_limit)
{
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
bool is_mask = src_flow != flow;
const struct nlattr *encap;
enum odp_key_fitness encap_fitness;
enum odp_key_fitness fitness = ODP_FIT_ERROR;
int vlan_limit;
int encaps = 0;
vlan_limit = ignore_vlan_limit ? FLOW_MAX_VLAN_HEADERS : flow_vlan_limit;
while (encaps < vlan_limit &&
(is_mask
? (src_flow->vlans[encaps].tci & htons(VLAN_CFI)) != 0
: eth_type_vlan(flow->dl_type))) {
encap = (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ENCAP)
? attrs[OVS_KEY_ATTR_ENCAP] : NULL);
/* Calculate fitness of outer attributes. */
if (!is_mask) {
expected_attrs |= ((UINT64_C(1) << OVS_KEY_ATTR_VLAN) |
(UINT64_C(1) << OVS_KEY_ATTR_ENCAP));
} else {
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_VLAN)) {
expected_attrs |= (UINT64_C(1) << OVS_KEY_ATTR_VLAN);
}
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ENCAP)) {
expected_attrs |= (UINT64_C(1) << OVS_KEY_ATTR_ENCAP);
}
}
fitness = check_expectations(present_attrs, out_of_range_attr,
expected_attrs, key, key_len);
/* Set vlan_tci.
* Remove the TPID from dl_type since it's not the real Ethertype. */
flow->vlans[encaps].tpid = flow->dl_type;
flow->dl_type = htons(0);
flow->vlans[encaps].tci =
(present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_VLAN)
? nl_attr_get_be16(attrs[OVS_KEY_ATTR_VLAN])
: htons(0));
if (!is_mask) {
if (!(present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_VLAN)) ||
!(present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ENCAP))) {
return ODP_FIT_TOO_LITTLE;
} else if (flow->vlans[encaps].tci == htons(0)) {
/* Corner case for a truncated 802.1Q header. */
if (fitness == ODP_FIT_PERFECT && nl_attr_get_size(encap)) {
return ODP_FIT_TOO_MUCH;
}
return fitness;
} else if (!(flow->vlans[encaps].tci & htons(VLAN_CFI))) {
odp_parse_error(
&rl, errorp, "OVS_KEY_ATTR_VLAN 0x%04"PRIx16" is nonzero "
"but CFI bit is not set", ntohs(flow->vlans[encaps].tci));
return ODP_FIT_ERROR;
}
} else {
if (!(present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ENCAP))) {
return fitness;
}
}
/* Now parse the encapsulated attributes. */
if (!parse_flow_nlattrs(nl_attr_get(encap), nl_attr_get_size(encap),
attrs, &present_attrs, &out_of_range_attr,
errorp)) {
return ODP_FIT_ERROR;
}
expected_attrs = 0;
/* For OVS to be backward compatible with newer datapath
* implementations, we should ignore out of range attributes. */
if (out_of_range_attr) {
VLOG_DBG("Flow key decode found unknown OVS_KEY_ATTR, %d",
out_of_range_attr);
out_of_range_attr = 0;
}
if (!parse_ethertype(attrs, present_attrs, &expected_attrs,
flow, src_flow, errorp)) {
return ODP_FIT_ERROR;
}
encap_fitness = parse_l2_5_onward(attrs, present_attrs,
out_of_range_attr,
&expected_attrs,
flow, key, key_len,
src_flow, false, errorp);
if (encap_fitness != ODP_FIT_PERFECT) {
return encap_fitness;
}
encaps++;
}
return check_expectations(present_attrs, out_of_range_attr,
expected_attrs, key, key_len);
}
static enum odp_key_fitness
odp_flow_key_to_flow__(const struct nlattr *key, size_t key_len,
struct flow *flow, const struct flow *src_flow,
char **errorp, bool ignore_vlan_limit)
{
/* New "struct flow" fields that are visible to the datapath (including all
* data fields) should be translated from equivalent datapath flow fields
* here (you will have to add a OVS_KEY_ATTR_* for them). */
BUILD_ASSERT_DECL(FLOW_WC_SEQ == 42);
enum odp_key_fitness fitness = ODP_FIT_ERROR;
if (errorp) {
*errorp = NULL;
}
const struct nlattr *attrs[OVS_KEY_ATTR_MAX + 1];
uint64_t expected_attrs;
uint64_t present_attrs;
int out_of_range_attr;
bool is_mask = src_flow != flow;
memset(flow, 0, sizeof *flow);
/* Parse attributes. */
if (!parse_flow_nlattrs(key, key_len, attrs, &present_attrs,
&out_of_range_attr, errorp)) {
goto exit;
}
expected_attrs = 0;
/* For OVS to be backward compatible with newer datapath implementations,
* we should ignore out of range attributes. */
if (out_of_range_attr) {
VLOG_DBG("Flow key decode found unknown OVS_KEY_ATTR, %d",
out_of_range_attr);
out_of_range_attr = 0;
}
/* Metadata. */
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_RECIRC_ID)) {
flow->recirc_id = nl_attr_get_u32(attrs[OVS_KEY_ATTR_RECIRC_ID]);
expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_RECIRC_ID;
} else if (is_mask) {
/* Always exact match recirc_id if it is not specified. */
flow->recirc_id = UINT32_MAX;
}
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_DP_HASH)) {
flow->dp_hash = nl_attr_get_u32(attrs[OVS_KEY_ATTR_DP_HASH]);
expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_DP_HASH;
}
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_PRIORITY)) {
flow->skb_priority = nl_attr_get_u32(attrs[OVS_KEY_ATTR_PRIORITY]);
expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_PRIORITY;
}
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_SKB_MARK)) {
flow->pkt_mark = nl_attr_get_u32(attrs[OVS_KEY_ATTR_SKB_MARK]);
expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_SKB_MARK;
}
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_CT_STATE)) {
uint32_t odp_state = nl_attr_get_u32(attrs[OVS_KEY_ATTR_CT_STATE]);
flow->ct_state = odp_to_ovs_ct_state(odp_state);
expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_CT_STATE;
}
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_CT_ZONE)) {
flow->ct_zone = nl_attr_get_u16(attrs[OVS_KEY_ATTR_CT_ZONE]);
expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_CT_ZONE;
}
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_CT_MARK)) {
flow->ct_mark = nl_attr_get_u32(attrs[OVS_KEY_ATTR_CT_MARK]);
expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_CT_MARK;
}
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_CT_LABELS)) {
flow->ct_label = nl_attr_get_u128(attrs[OVS_KEY_ATTR_CT_LABELS]);
expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_CT_LABELS;
}
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4)) {
const struct ovs_key_ct_tuple_ipv4 *ct = nl_attr_get(attrs[OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4]);
flow->ct_nw_src = ct->ipv4_src;
flow->ct_nw_dst = ct->ipv4_dst;
flow->ct_nw_proto = ct->ipv4_proto;
flow->ct_tp_src = ct->src_port;
flow->ct_tp_dst = ct->dst_port;
expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4;
}
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6)) {
const struct ovs_key_ct_tuple_ipv6 *ct = nl_attr_get(attrs[OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6]);
flow->ct_ipv6_src = ct->ipv6_src;
flow->ct_ipv6_dst = ct->ipv6_dst;
flow->ct_nw_proto = ct->ipv6_proto;
flow->ct_tp_src = ct->src_port;
flow->ct_tp_dst = ct->dst_port;
expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6;
}
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_TUNNEL)) {
enum odp_key_fitness res;
res = odp_tun_key_from_attr__(attrs[OVS_KEY_ATTR_TUNNEL], is_mask,
&flow->tunnel, errorp);
if (res == ODP_FIT_ERROR) {
goto exit;
} else if (res == ODP_FIT_PERFECT) {
expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_TUNNEL;
}
}
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_IN_PORT)) {
flow->in_port.odp_port
= nl_attr_get_odp_port(attrs[OVS_KEY_ATTR_IN_PORT]);
expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_IN_PORT;
} else if (!is_mask) {
flow->in_port.odp_port = ODPP_NONE;
}
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_PACKET_TYPE)) {
flow->packet_type
= nl_attr_get_be32(attrs[OVS_KEY_ATTR_PACKET_TYPE]);
expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_PACKET_TYPE;
if (pt_ns(src_flow->packet_type) == OFPHTN_ETHERTYPE) {
flow->dl_type = pt_ns_type_be(flow->packet_type);
}
} else if (!is_mask) {
flow->packet_type = htonl(PT_ETH);
}
/* Check for Ethernet header. */
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ETHERNET)) {
const struct ovs_key_ethernet *eth_key;
eth_key = nl_attr_get(attrs[OVS_KEY_ATTR_ETHERNET]);
put_ethernet_key(eth_key, flow);
if (!is_mask) {
flow->packet_type = htonl(PT_ETH);
}
expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ETHERNET;
}
else if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ETHERTYPE)) {
ovs_be16 ethertype = nl_attr_get_be16(attrs[OVS_KEY_ATTR_ETHERTYPE]);
if (!is_mask) {
flow->packet_type = PACKET_TYPE_BE(OFPHTN_ETHERTYPE,
ntohs(ethertype));
}
expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ETHERTYPE;
}
/* Get Ethertype or 802.1Q TPID or FLOW_DL_TYPE_NONE. */
if (!parse_ethertype(attrs, present_attrs, &expected_attrs, flow,
src_flow, errorp)) {
goto exit;
}
if (is_mask
? (src_flow->vlans[0].tci & htons(VLAN_CFI)) != 0
: eth_type_vlan(src_flow->dl_type)) {
fitness = parse_8021q_onward(attrs, present_attrs, out_of_range_attr,
expected_attrs, flow, key, key_len,
src_flow, errorp, ignore_vlan_limit);
} else {
if (is_mask) {
/* A missing VLAN mask means exact match on vlan_tci 0 (== no
* VLAN). */
flow->vlans[0].tpid = htons(0xffff);
flow->vlans[0].tci = htons(0xffff);
if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_VLAN)) {
flow->vlans[0].tci = nl_attr_get_be16(
attrs[OVS_KEY_ATTR_VLAN]);
expected_attrs |= (UINT64_C(1) << OVS_KEY_ATTR_VLAN);
}
}
fitness = parse_l2_5_onward(attrs, present_attrs, out_of_range_attr,
&expected_attrs, flow, key, key_len,
src_flow, true, errorp);
}
exit:;
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
if (fitness == ODP_FIT_ERROR && (errorp || !VLOG_DROP_WARN(&rl))) {
struct ds s = DS_EMPTY_INITIALIZER;
if (is_mask) {
ds_put_cstr(&s, "the flow mask in error is: ");
odp_flow_key_format(key, key_len, &s);
ds_put_cstr(&s, ", for the following flow key: ");
flow_format(&s, src_flow, NULL);
} else {
ds_put_cstr(&s, "the flow key in error is: ");
odp_flow_key_format(key, key_len, &s);
}
if (errorp) {
char *old_error = *errorp;
*errorp = xasprintf("%s; %s", old_error, ds_cstr(&s));
free(old_error);
} else {
VLOG_WARN("%s", ds_cstr(&s));
}
ds_destroy(&s);
}
return fitness;
}
/* Converts the 'key_len' bytes of OVS_KEY_ATTR_* attributes in 'key' to a flow
* structure in 'flow'. Returns an ODP_FIT_* value that indicates how well
* 'key' fits our expectations for what a flow key should contain.
*
* The 'in_port' will be the datapath's understanding of the port. The
* caller will need to translate with odp_port_to_ofp_port() if the
* OpenFlow port is needed.
*
* This function doesn't take the packet itself as an argument because none of
* the currently understood OVS_KEY_ATTR_* attributes require it. Currently,
* it is always possible to infer which additional attribute(s) should appear
* by looking at the attributes for lower-level protocols, e.g. if the network
* protocol in OVS_KEY_ATTR_IPV4 or OVS_KEY_ATTR_IPV6 is IPPROTO_TCP then we
* know that a OVS_KEY_ATTR_TCP attribute must appear and that otherwise it
* must be absent.
*
* If 'errorp' is nonnull, this function uses it for detailed error reports: if
* the return value is ODP_FIT_ERROR, it stores a malloc()'d error string in
* '*errorp', otherwise NULL. */
enum odp_key_fitness
odp_flow_key_to_flow(const struct nlattr *key, size_t key_len,
struct flow *flow, char **errorp)
{
return odp_flow_key_to_flow__(key, key_len, flow, flow, errorp, false);
}
/* Converts the 'mask_key_len' bytes of OVS_KEY_ATTR_* attributes in 'mask_key'
* to a mask structure in 'mask'. 'flow' must be a previously translated flow
* corresponding to 'mask' and similarly flow_key/flow_key_len must be the
* attributes from that flow. Returns an ODP_FIT_* value that indicates how
* well 'key' fits our expectations for what a flow key should contain.
*
* If 'errorp' is nonnull, this function uses it for detailed error reports: if
* the return value is ODP_FIT_ERROR, it stores a malloc()'d error string in
* '*errorp', otherwise NULL. */
static enum odp_key_fitness
odp_flow_key_to_mask__(const struct nlattr *mask_key, size_t mask_key_len,
struct flow_wildcards *mask,
const struct flow *src_flow,
char **errorp, bool ignore_vlan_limit)
{
if (mask_key_len) {
return odp_flow_key_to_flow__(mask_key, mask_key_len,
&mask->masks, src_flow, errorp,
ignore_vlan_limit);
} else {
if (errorp) {
*errorp = NULL;
}
/* A missing mask means that the flow should be exact matched.
* Generate an appropriate exact wildcard for the flow. */
flow_wildcards_init_for_packet(mask, src_flow);
return ODP_FIT_PERFECT;
}
}
enum odp_key_fitness
odp_flow_key_to_mask(const struct nlattr *mask_key, size_t mask_key_len,
struct flow_wildcards *mask,
const struct flow *src_flow, char **errorp)
{
return odp_flow_key_to_mask__(mask_key, mask_key_len, mask, src_flow,
errorp, false);
}
/* Converts the netlink formated key/mask to match.
* Fails if odp_flow_key_from_key/mask and odp_flow_key_key/mask
* disagree on the acceptable form of flow */
int
parse_key_and_mask_to_match(const struct nlattr *key, size_t key_len,
const struct nlattr *mask, size_t mask_len,
struct match *match)
{
enum odp_key_fitness fitness;
fitness = odp_flow_key_to_flow__(key, key_len, &match->flow, &match->flow,
NULL, true);
if (fitness) {
/* This will happen when the odp_flow_key_to_flow() function can't
* parse the netlink message to a match structure. It will return
* ODP_FIT_TOO_LITTLE if there is not enough information to parse the
* content successfully, ODP_FIT_TOO_MUCH if there is too much netlink
* data and we do not know how to safely ignore it, and ODP_FIT_ERROR
* in any other case. */
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
if (!VLOG_DROP_ERR(&rl)) {
struct ds s;
ds_init(&s);
odp_flow_format(key, key_len, NULL, 0, NULL, &s, true, false);
VLOG_ERR("internal error parsing flow key %s (%s)",
ds_cstr(&s), odp_key_fitness_to_string(fitness));
ds_destroy(&s);
}
return EINVAL;
}
fitness = odp_flow_key_to_mask__(mask, mask_len, &match->wc, &match->flow,
NULL, true);
if (fitness) {
/* This should not happen, see comment above. */
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
if (!VLOG_DROP_ERR(&rl)) {
struct ds s;
ds_init(&s);
odp_flow_format(key, key_len, mask, mask_len, NULL, &s,
true, true);
VLOG_ERR("internal error parsing flow mask %s (%s)",
ds_cstr(&s), odp_key_fitness_to_string(fitness));
ds_destroy(&s);
}
return EINVAL;
}
return 0;
}
/* Returns 'fitness' as a string, for use in debug messages. */
const char *
odp_key_fitness_to_string(enum odp_key_fitness fitness)
{
switch (fitness) {
case ODP_FIT_PERFECT:
return "OK";
case ODP_FIT_TOO_MUCH:
return "too_much";
case ODP_FIT_TOO_LITTLE:
return "too_little";
case ODP_FIT_ERROR:
return "error";
default:
return "<unknown>";
}
}
/* Appends an OVS_ACTION_ATTR_USERSPACE action to 'odp_actions' that specifies
* Netlink PID 'pid'. If 'userdata' is nonnull, adds a userdata attribute
* whose contents are the 'userdata_size' bytes at 'userdata' and sets
* 'odp_actions_ofs' if nonnull with the offset within 'odp_actions' of the
* start of the cookie. (If 'userdata' is null, then the 'odp_actions_ofs'
* value is not meaningful.)
*
* Returns negative error code on failure. */
int
odp_put_userspace_action(uint32_t pid,
const void *userdata, size_t userdata_size,
odp_port_t tunnel_out_port,
bool include_actions,
struct ofpbuf *odp_actions, size_t *odp_actions_ofs)
{
size_t userdata_ofs;
size_t offset;
offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_USERSPACE);
nl_msg_put_u32(odp_actions, OVS_USERSPACE_ATTR_PID, pid);
if (userdata) {
if (nl_attr_oversized(userdata_size)) {
return -E2BIG;
}
userdata_ofs = odp_actions->size + NLA_HDRLEN;
/* The OVS kernel module before OVS 1.11 and the upstream Linux kernel
* module before Linux 3.10 required the userdata to be exactly 8 bytes
* long:
*
* - The kernel rejected shorter userdata with -ERANGE.
*
* - The kernel silently dropped userdata beyond the first 8 bytes.
*
* Thus, for maximum compatibility, always put at least 8 bytes. (We
* separately disable features that required more than 8 bytes.) */
memcpy(nl_msg_put_unspec_zero(odp_actions, OVS_USERSPACE_ATTR_USERDATA,
MAX(8, userdata_size)),
userdata, userdata_size);
} else {
userdata_ofs = 0;
}
if (tunnel_out_port != ODPP_NONE) {
nl_msg_put_odp_port(odp_actions, OVS_USERSPACE_ATTR_EGRESS_TUN_PORT,
tunnel_out_port);
}
if (include_actions) {
nl_msg_put_flag(odp_actions, OVS_USERSPACE_ATTR_ACTIONS);
}
if (nl_attr_oversized(odp_actions->size - offset - NLA_HDRLEN)) {
return -E2BIG;
}
nl_msg_end_nested(odp_actions, offset);
if (odp_actions_ofs) {
*odp_actions_ofs = userdata_ofs;
}
return 0;
}
void
odp_put_pop_eth_action(struct ofpbuf *odp_actions)
{
nl_msg_put_flag(odp_actions, OVS_ACTION_ATTR_POP_ETH);
}
void
odp_put_push_eth_action(struct ofpbuf *odp_actions,
const struct eth_addr *eth_src,
const struct eth_addr *eth_dst)
{
struct ovs_action_push_eth eth;
memset(&eth, 0, sizeof eth);
if (eth_src) {
eth.addresses.eth_src = *eth_src;
}
if (eth_dst) {
eth.addresses.eth_dst = *eth_dst;
}
nl_msg_put_unspec(odp_actions, OVS_ACTION_ATTR_PUSH_ETH,
&eth, sizeof eth);
}
void
odp_put_tunnel_action(const struct flow_tnl *tunnel,
struct ofpbuf *odp_actions, const char *tnl_type)
{
size_t offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_SET);
tun_key_to_attr(odp_actions, tunnel, tunnel, NULL, tnl_type);
nl_msg_end_nested(odp_actions, offset);
}
void
odp_put_tnl_push_action(struct ofpbuf *odp_actions,
struct ovs_action_push_tnl *data)
{
int size = offsetof(struct ovs_action_push_tnl, header);
size += data->header_len;
nl_msg_put_unspec(odp_actions, OVS_ACTION_ATTR_TUNNEL_PUSH, data, size);
}
void
odp_put_psample_action(struct ofpbuf *odp_actions, uint32_t group_id,
uint8_t *cookie, size_t cookie_len)
{
size_t offset = nl_msg_start_nested_with_flag(odp_actions,
OVS_ACTION_ATTR_PSAMPLE);
nl_msg_put_u32(odp_actions, OVS_PSAMPLE_ATTR_GROUP, group_id);
if (cookie && cookie_len) {
ovs_assert(cookie_len <= OVS_PSAMPLE_COOKIE_MAX_SIZE);
nl_msg_put_unspec(odp_actions, OVS_PSAMPLE_ATTR_COOKIE, cookie,
cookie_len);
}
nl_msg_end_nested(odp_actions, offset);
}
/* The commit_odp_actions() function and its helpers. */
static void
commit_set_action(struct ofpbuf *odp_actions, enum ovs_key_attr key_type,
const void *key, size_t key_size)
{
size_t offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_SET);
nl_msg_put_unspec(odp_actions, key_type, key, key_size);
nl_msg_end_nested(odp_actions, offset);
}
/* Masked set actions have a mask following the data within the netlink
* attribute. The unmasked bits in the data will be cleared as the data
* is copied to the action. */
void
commit_masked_set_action(struct ofpbuf *odp_actions,
enum ovs_key_attr key_type,
const void *key_, const void *mask_, size_t key_size)
{
size_t offset = nl_msg_start_nested(odp_actions,
OVS_ACTION_ATTR_SET_MASKED);
char *data = nl_msg_put_unspec_uninit(odp_actions, key_type, key_size * 2);
const char *key = key_, *mask = mask_;
memcpy(data + key_size, mask, key_size);
/* Clear unmasked bits while copying. */
while (key_size--) {
*data++ = *key++ & *mask++;
}
nl_msg_end_nested(odp_actions, offset);
}
/* If any of the flow key data that ODP actions can modify are different in
* 'base->tunnel' and 'flow->tunnel', appends a set_tunnel ODP action to
* 'odp_actions' that change the flow tunneling information in key from
* 'base->tunnel' into 'flow->tunnel', and then changes 'base->tunnel' in the
* same way. In other words, operates the same as commit_odp_actions(), but
* only on tunneling information. */
void
commit_odp_tunnel_action(const struct flow *flow, struct flow *base,
struct ofpbuf *odp_actions, const char *tnl_type)
{
/* A valid IPV4_TUNNEL must have non-zero ip_dst; a valid IPv6 tunnel
* must have non-zero ipv6_dst. */
if (flow_tnl_dst_is_set(&flow->tunnel)) {
if (!memcmp(&base->tunnel, &flow->tunnel, sizeof base->tunnel)) {
return;
}
memcpy(&base->tunnel, &flow->tunnel, sizeof base->tunnel);
odp_put_tunnel_action(&base->tunnel, odp_actions, tnl_type);
}
}
struct offsetof_sizeof {
int offset;
int size;
};
/* Performs bitwise OR over the fields in 'dst_' and 'src_' specified in
* 'offsetof_sizeof_arr' array. Result is stored in 'dst_'. */
static void
or_masks(void *dst_, const void *src_,
struct offsetof_sizeof *offsetof_sizeof_arr)
{
int field, size, offset;
const uint8_t *src = src_;
uint8_t *dst = dst_;
for (field = 0; ; field++) {
size = offsetof_sizeof_arr[field].size;
offset = offsetof_sizeof_arr[field].offset;
if (!size) {
return;
}
or_bytes(dst + offset, src + offset, size);
}
}
/* Compares each of the fields in 'key0' and 'key1'. The fields are specified
* in 'offsetof_sizeof_arr', which is an array terminated by a 0-size field.
* Returns true if all of the fields are equal, false if at least one differs.
* As a side effect, for each field that is the same in 'key0' and 'key1',
* zeros the corresponding bytes in 'mask'. */
static bool
keycmp_mask(const void *key0, const void *key1,
struct offsetof_sizeof *offsetof_sizeof_arr, void *mask)
{
bool differ = false;
for (int field = 0 ; ; field++) {
int size = offsetof_sizeof_arr[field].size;
int offset = offsetof_sizeof_arr[field].offset;
if (size == 0) {
break;
}
char *pkey0 = ((char *)key0) + offset;
char *pkey1 = ((char *)key1) + offset;
char *pmask = ((char *)mask) + offset;
if (memcmp(pkey0, pkey1, size) == 0) {
memset(pmask, 0, size);
} else {
differ = true;
}
}
return differ;
}
static bool
commit(enum ovs_key_attr attr, bool use_masked_set,
const void *key, void *base, void *mask, size_t size,
struct offsetof_sizeof *offsetof_sizeof_arr,
struct ofpbuf *odp_actions)
{
if (keycmp_mask(key, base, offsetof_sizeof_arr, mask)) {
bool fully_masked = odp_mask_is_exact(attr, mask, size);
if (use_masked_set && !fully_masked) {
commit_masked_set_action(odp_actions, attr, key, mask, size);
} else {
if (!fully_masked) {
memset(mask, 0xff, size);
}
commit_set_action(odp_actions, attr, key, size);
}
memcpy(base, key, size);
return true;
} else {
/* Mask bits are set when we have either read or set the corresponding
* values. Masked bits will be exact-matched, no need to set them
* if the value did not actually change. */
return false;
}
}
static void
get_ethernet_key(const struct flow *flow, struct ovs_key_ethernet *eth)
{
eth->eth_src = flow->dl_src;
eth->eth_dst = flow->dl_dst;
}
static void
put_ethernet_key(const struct ovs_key_ethernet *eth, struct flow *flow)
{
flow->dl_src = eth->eth_src;
flow->dl_dst = eth->eth_dst;
}
static void
commit_set_ether_action(const struct flow *flow, struct flow *base_flow,
struct ofpbuf *odp_actions,
struct flow_wildcards *wc,
bool use_masked)
{
struct ovs_key_ethernet key, base, mask, orig_mask;
struct offsetof_sizeof ovs_key_ethernet_offsetof_sizeof_arr[] =
OVS_KEY_ETHERNET_OFFSETOF_SIZEOF_ARR;
if (flow->packet_type != htonl(PT_ETH) ||
base_flow->packet_type != htonl(PT_ETH)) {
return;
}
get_ethernet_key(flow, &key);
get_ethernet_key(base_flow, &base);
get_ethernet_key(&wc->masks, &mask);
memcpy(&orig_mask, &mask, sizeof mask);
if (commit(OVS_KEY_ATTR_ETHERNET, use_masked,
&key, &base, &mask, sizeof key,
ovs_key_ethernet_offsetof_sizeof_arr, odp_actions)) {
put_ethernet_key(&base, base_flow);
or_masks(&mask, &orig_mask, ovs_key_ethernet_offsetof_sizeof_arr);
put_ethernet_key(&mask, &wc->masks);
}
}
static void
commit_vlan_action(const struct flow* flow, struct flow *base,
struct ofpbuf *odp_actions, struct flow_wildcards *wc)
{
int base_n = flow_count_vlan_headers(base);
int flow_n = flow_count_vlan_headers(flow);
flow_skip_common_vlan_headers(base, &base_n, flow, &flow_n);
/* Pop all mismatching vlan of base, push those of flow */
for (; base_n >= 0; base_n--) {
nl_msg_put_flag(odp_actions, OVS_ACTION_ATTR_POP_VLAN);
wc->masks.vlans[base_n].qtag = OVS_BE32_MAX;
}
for (; flow_n >= 0; flow_n--) {
struct ovs_action_push_vlan vlan;
vlan.vlan_tpid = flow->vlans[flow_n].tpid;
vlan.vlan_tci = flow->vlans[flow_n].tci;
nl_msg_put_unspec(odp_actions, OVS_ACTION_ATTR_PUSH_VLAN,
&vlan, sizeof vlan);
}
memcpy(base->vlans, flow->vlans, sizeof(base->vlans));
}
/* Wildcarding already done at action translation time. */
static void
commit_mpls_action(const struct flow *flow, struct flow *base,
struct ofpbuf *odp_actions, bool pending_encap)
{
int base_n = flow_count_mpls_labels(base, NULL);
int flow_n = flow_count_mpls_labels(flow, NULL);
int common_n = flow_count_common_mpls_labels(flow, flow_n, base, base_n,
NULL);
while (base_n > common_n) {
if (base_n - 1 == common_n && flow_n > common_n) {
/* If there is only one more LSE in base than there are common
* between base and flow; and flow has at least one more LSE than
* is common then the topmost LSE of base may be updated using
* set */
struct ovs_key_mpls mpls_key;
mpls_key.mpls_lse = flow->mpls_lse[flow_n - base_n];
commit_set_action(odp_actions, OVS_KEY_ATTR_MPLS,
&mpls_key, sizeof mpls_key);
flow_set_mpls_lse(base, 0, mpls_key.mpls_lse);
common_n++;
} else {
/* Otherwise, if there more LSEs in base than are common between
* base and flow then pop the topmost one. */
ovs_be16 dl_type;
/* If all the LSEs are to be popped and this is not the outermost
* LSE then use ETH_TYPE_MPLS as the ethertype parameter of the
* POP_MPLS action instead of flow->dl_type.
*
* This is because the POP_MPLS action requires its ethertype
* argument to be an MPLS ethernet type but in this case
* flow->dl_type will be a non-MPLS ethernet type.
*
* When the final POP_MPLS action occurs it use flow->dl_type and
* the and the resulting packet will have the desired dl_type. */
if ((!eth_type_mpls(flow->dl_type)) && base_n > 1) {
dl_type = htons(ETH_TYPE_MPLS);
} else {
dl_type = flow->dl_type;
}
nl_msg_put_be16(odp_actions, OVS_ACTION_ATTR_POP_MPLS, dl_type);
ovs_assert(flow_pop_mpls(base, base_n, flow->dl_type, NULL));
base_n--;
}
}
/* If, after the above popping and setting, there are more LSEs in flow
* than base then some LSEs need to be pushed. */
while (base_n < flow_n) {
if (pending_encap) {
struct ovs_action_add_mpls *mpls;
mpls = nl_msg_put_unspec_zero(odp_actions,
OVS_ACTION_ATTR_ADD_MPLS,
sizeof *mpls);
mpls->mpls_ethertype = flow->dl_type;
mpls->mpls_lse = flow->mpls_lse[flow_n - base_n - 1];
} else {
struct ovs_action_push_mpls *mpls;
mpls = nl_msg_put_unspec_zero(odp_actions,
OVS_ACTION_ATTR_PUSH_MPLS,
sizeof *mpls);
mpls->mpls_ethertype = flow->dl_type;
mpls->mpls_lse = flow->mpls_lse[flow_n - base_n - 1];
}
/* Update base flow's MPLS stack, but do not clear L3. We need the L3
* headers if the flow is restored later due to returning from a patch
* port or group bucket. */
flow_push_mpls(base, base_n, flow->dl_type, NULL, false);
flow_set_mpls_lse(base, 0, flow->mpls_lse[flow_n - base_n - 1]);
base_n++;
}
}
static void
get_ipv4_key(const struct flow *flow, struct ovs_key_ipv4 *ipv4, bool is_mask)
{
ipv4->ipv4_src = flow->nw_src;
ipv4->ipv4_dst = flow->nw_dst;
ipv4->ipv4_proto = flow->nw_proto;
ipv4->ipv4_tos = flow->nw_tos;
ipv4->ipv4_ttl = flow->nw_ttl;
ipv4->ipv4_frag = ovs_to_odp_frag(flow->nw_frag, is_mask);
}
static void
put_ipv4_key(const struct ovs_key_ipv4 *ipv4, struct flow *flow, bool is_mask)
{
flow->nw_src = ipv4->ipv4_src;
flow->nw_dst = ipv4->ipv4_dst;
flow->nw_proto = ipv4->ipv4_proto;
flow->nw_tos = ipv4->ipv4_tos;
flow->nw_ttl = ipv4->ipv4_ttl;
flow->nw_frag = odp_to_ovs_frag(ipv4->ipv4_frag, is_mask);
}
static void
commit_set_ipv4_action(const struct flow *flow, struct flow *base_flow,
struct ofpbuf *odp_actions, struct flow_wildcards *wc,
bool use_masked)
{
struct ovs_key_ipv4 key, mask, orig_mask, base;
struct offsetof_sizeof ovs_key_ipv4_offsetof_sizeof_arr[] =
OVS_KEY_IPV4_OFFSETOF_SIZEOF_ARR;
/* Check that nw_proto and nw_frag remain unchanged. */
ovs_assert(flow->nw_proto == base_flow->nw_proto &&
flow->nw_frag == base_flow->nw_frag);
get_ipv4_key(flow, &key, false);
get_ipv4_key(base_flow, &base, false);
get_ipv4_key(&wc->masks, &mask, true);
memcpy(&orig_mask, &mask, sizeof mask);
mask.ipv4_proto = 0; /* Not writeable. */
mask.ipv4_frag = 0; /* Not writable. */
if (flow_tnl_dst_is_set(&base_flow->tunnel) &&
((base_flow->nw_tos ^ flow->nw_tos) & IP_ECN_MASK) == 0) {
mask.ipv4_tos &= ~IP_ECN_MASK;
}
if (commit(OVS_KEY_ATTR_IPV4, use_masked, &key, &base, &mask, sizeof key,
ovs_key_ipv4_offsetof_sizeof_arr, odp_actions)) {
put_ipv4_key(&base, base_flow, false);
or_masks(&mask, &orig_mask, ovs_key_ipv4_offsetof_sizeof_arr);
put_ipv4_key(&mask, &wc->masks, true);
}
}
static void
get_ipv6_key(const struct flow *flow, struct ovs_key_ipv6 *ipv6, bool is_mask)
{
ipv6->ipv6_src = flow->ipv6_src;
ipv6->ipv6_dst = flow->ipv6_dst;
ipv6->ipv6_label = flow->ipv6_label;
ipv6->ipv6_proto = flow->nw_proto;
ipv6->ipv6_tclass = flow->nw_tos;
ipv6->ipv6_hlimit = flow->nw_ttl;
ipv6->ipv6_frag = ovs_to_odp_frag(flow->nw_frag, is_mask);
}
static void
put_ipv6_key(const struct ovs_key_ipv6 *ipv6, struct flow *flow, bool is_mask)
{
flow->ipv6_src = ipv6->ipv6_src;
flow->ipv6_dst = ipv6->ipv6_dst;
flow->ipv6_label = ipv6->ipv6_label;
flow->nw_proto = ipv6->ipv6_proto;
flow->nw_tos = ipv6->ipv6_tclass;
flow->nw_ttl = ipv6->ipv6_hlimit;
flow->nw_frag = odp_to_ovs_frag(ipv6->ipv6_frag, is_mask);
}
static void
commit_set_ipv6_action(const struct flow *flow, struct flow *base_flow,
struct ofpbuf *odp_actions, struct flow_wildcards *wc,
bool use_masked)
{
struct ovs_key_ipv6 key, mask, orig_mask, base;
struct offsetof_sizeof ovs_key_ipv6_offsetof_sizeof_arr[] =
OVS_KEY_IPV6_OFFSETOF_SIZEOF_ARR;
/* Check that nw_proto and nw_frag remain unchanged. */
ovs_assert(flow->nw_proto == base_flow->nw_proto &&
flow->nw_frag == base_flow->nw_frag);
get_ipv6_key(flow, &key, false);
get_ipv6_key(base_flow, &base, false);
get_ipv6_key(&wc->masks, &mask, true);
memcpy(&orig_mask, &mask, sizeof mask);
mask.ipv6_proto = 0; /* Not writeable. */
mask.ipv6_frag = 0; /* Not writable. */
mask.ipv6_label &= htonl(IPV6_LABEL_MASK); /* Not writable. */
if (flow_tnl_dst_is_set(&base_flow->tunnel) &&
((base_flow->nw_tos ^ flow->nw_tos) & IP_ECN_MASK) == 0) {
mask.ipv6_tclass &= ~IP_ECN_MASK;
}
if (commit(OVS_KEY_ATTR_IPV6, use_masked, &key, &base, &mask, sizeof key,
ovs_key_ipv6_offsetof_sizeof_arr, odp_actions)) {
put_ipv6_key(&base, base_flow, false);
or_masks(&mask, &orig_mask, ovs_key_ipv6_offsetof_sizeof_arr);
put_ipv6_key(&mask, &wc->masks, true);
}
}
static void
get_arp_key(const struct flow *flow, struct ovs_key_arp *arp)
{
/* ARP key has padding, clear it. */
memset(arp, 0, sizeof *arp);
arp->arp_sip = flow->nw_src;
arp->arp_tip = flow->nw_dst;
arp->arp_op = flow->nw_proto == UINT8_MAX ?
OVS_BE16_MAX : htons(flow->nw_proto);
arp->arp_sha = flow->arp_sha;
arp->arp_tha = flow->arp_tha;
}
static void
put_arp_key(const struct ovs_key_arp *arp, struct flow *flow)
{
flow->nw_src = arp->arp_sip;
flow->nw_dst = arp->arp_tip;
flow->nw_proto = ntohs(arp->arp_op);
flow->arp_sha = arp->arp_sha;
flow->arp_tha = arp->arp_tha;
}
static enum slow_path_reason
commit_set_arp_action(const struct flow *flow, struct flow *base_flow,
struct ofpbuf *odp_actions, struct flow_wildcards *wc)
{
struct ovs_key_arp key, mask, orig_mask, base;
struct offsetof_sizeof ovs_key_arp_offsetof_sizeof_arr[] =
OVS_KEY_ARP_OFFSETOF_SIZEOF_ARR;
get_arp_key(flow, &key);
get_arp_key(base_flow, &base);
get_arp_key(&wc->masks, &mask);
memcpy(&orig_mask, &mask, sizeof mask);
if (commit(OVS_KEY_ATTR_ARP, true, &key, &base, &mask, sizeof key,
ovs_key_arp_offsetof_sizeof_arr, odp_actions)) {
put_arp_key(&base, base_flow);
or_masks(&mask, &orig_mask, ovs_key_arp_offsetof_sizeof_arr);
put_arp_key(&mask, &wc->masks);
return SLOW_ACTION;
}
return 0;
}
static void
get_icmp_key(const struct flow *flow, struct ovs_key_icmp *icmp)
{
/* icmp_type and icmp_code are stored in tp_src and tp_dst, respectively */
icmp->icmp_type = ntohs(flow->tp_src);
icmp->icmp_code = ntohs(flow->tp_dst);
}
static void
put_icmp_key(const struct ovs_key_icmp *icmp, struct flow *flow)
{
/* icmp_type and icmp_code are stored in tp_src and tp_dst, respectively */
flow->tp_src = htons(icmp->icmp_type);
flow->tp_dst = htons(icmp->icmp_code);
}
static enum slow_path_reason
commit_set_icmp_action(const struct flow *flow, struct flow *base_flow,
struct ofpbuf *odp_actions, struct flow_wildcards *wc)
{
struct ovs_key_icmp key, mask, orig_mask, base;
struct offsetof_sizeof ovs_key_icmp_offsetof_sizeof_arr[] =
OVS_KEY_ICMP_OFFSETOF_SIZEOF_ARR;
enum ovs_key_attr attr;
if (is_icmpv4(flow, NULL)) {
attr = OVS_KEY_ATTR_ICMP;
} else if (is_icmpv6(flow, NULL)) {
attr = OVS_KEY_ATTR_ICMPV6;
} else {
return 0;
}
get_icmp_key(flow, &key);
get_icmp_key(base_flow, &base);
get_icmp_key(&wc->masks, &mask);
memcpy(&orig_mask, &mask, sizeof mask);
if (commit(attr, false, &key, &base, &mask, sizeof key,
ovs_key_icmp_offsetof_sizeof_arr, odp_actions)) {
put_icmp_key(&base, base_flow);
or_masks(&mask, &orig_mask, ovs_key_icmp_offsetof_sizeof_arr);
put_icmp_key(&mask, &wc->masks);
return SLOW_ACTION;
}
return 0;
}
static void
get_nd_key(const struct flow *flow, struct ovs_key_nd *nd)
{
nd->nd_target = flow->nd_target;
/* nd_sll and nd_tll are stored in arp_sha and arp_tha, respectively */
nd->nd_sll = flow->arp_sha;
nd->nd_tll = flow->arp_tha;
}
static void
put_nd_key(const struct ovs_key_nd *nd, struct flow *flow)
{
flow->nd_target = nd->nd_target;
/* nd_sll and nd_tll are stored in arp_sha and arp_tha, respectively */
flow->arp_sha = nd->nd_sll;
flow->arp_tha = nd->nd_tll;
}
static void
get_nd_extensions_key(const struct flow *flow,
struct ovs_key_nd_extensions *nd_ext)
{
/* ND Extensions key has padding, clear it. */
memset(nd_ext, 0, sizeof *nd_ext);
nd_ext->nd_reserved = flow->igmp_group_ip4;
nd_ext->nd_options_type = ntohs(flow->tcp_flags);
}
static void
put_nd_extensions_key(const struct ovs_key_nd_extensions *nd_ext,
struct flow *flow)
{
flow->igmp_group_ip4 = nd_ext->nd_reserved;
flow->tcp_flags = htons(nd_ext->nd_options_type);
}
static enum slow_path_reason
commit_set_nd_action(const struct flow *flow, struct flow *base_flow,
struct ofpbuf *odp_actions,
struct flow_wildcards *wc, bool use_masked)
{
struct ovs_key_nd key, mask, orig_mask, base;
struct offsetof_sizeof ovs_key_nd_offsetof_sizeof_arr[] =
OVS_KEY_ND_OFFSETOF_SIZEOF_ARR;
get_nd_key(flow, &key);
get_nd_key(base_flow, &base);
get_nd_key(&wc->masks, &mask);
memcpy(&orig_mask, &mask, sizeof mask);
if (commit(OVS_KEY_ATTR_ND, use_masked, &key, &base, &mask, sizeof key,
ovs_key_nd_offsetof_sizeof_arr, odp_actions)) {
put_nd_key(&base, base_flow);
or_masks(&mask, &orig_mask, ovs_key_nd_offsetof_sizeof_arr);
put_nd_key(&mask, &wc->masks);
return SLOW_ACTION;
}
return 0;
}
static enum slow_path_reason
commit_set_nd_extensions_action(const struct flow *flow,
struct flow *base_flow,
struct ofpbuf *odp_actions,
struct flow_wildcards *wc, bool use_masked)
{
struct ovs_key_nd_extensions key, mask, orig_mask, base;
struct offsetof_sizeof ovs_key_nd_extensions_offsetof_sizeof_arr[] =
OVS_KEY_ND_EXTENSIONS_OFFSETOF_SIZEOF_ARR;
get_nd_extensions_key(flow, &key);
get_nd_extensions_key(base_flow, &base);
get_nd_extensions_key(&wc->masks, &mask);
memcpy(&orig_mask, &mask, sizeof mask);
if (commit(OVS_KEY_ATTR_ND_EXTENSIONS, use_masked, &key, &base, &mask,
sizeof key, ovs_key_nd_extensions_offsetof_sizeof_arr,
odp_actions)) {
put_nd_extensions_key(&base, base_flow);
or_masks(&mask, &orig_mask, ovs_key_nd_extensions_offsetof_sizeof_arr);
put_nd_extensions_key(&mask, &wc->masks);
return SLOW_ACTION;
}
return 0;
}
static enum slow_path_reason
commit_set_nw_action(const struct flow *flow, struct flow *base,
struct ofpbuf *odp_actions, struct flow_wildcards *wc,
bool use_masked)
{
uint32_t reason;
/* Check if 'flow' really has an L3 header. */
if (!flow->nw_proto) {
return 0;
}
switch (ntohs(base->dl_type)) {
case ETH_TYPE_IP:
commit_set_ipv4_action(flow, base, odp_actions, wc, use_masked);
break;
case ETH_TYPE_IPV6:
commit_set_ipv6_action(flow, base, odp_actions, wc, use_masked);
if (base->nw_proto == IPPROTO_ICMPV6) {
/* Commit extended attrs first to make sure
correct options are added.*/
reason = commit_set_nd_extensions_action(flow, base,
odp_actions, wc, use_masked);
reason |= commit_set_nd_action(flow, base, odp_actions,
wc, use_masked);
return reason;
}
break;
case ETH_TYPE_ARP:
return commit_set_arp_action(flow, base, odp_actions, wc);
}
return 0;
}
static inline void
get_nsh_key(const struct flow *flow, struct ovs_key_nsh *nsh, bool is_mask)
{
*nsh = flow->nsh;
if (!is_mask) {
if (nsh->mdtype != NSH_M_TYPE1) {
memset(nsh->context, 0, sizeof(nsh->context));
}
}
}
static inline void
put_nsh_key(const struct ovs_key_nsh *nsh, struct flow *flow,
bool is_mask OVS_UNUSED)
{
flow->nsh = *nsh;
if (flow->nsh.mdtype != NSH_M_TYPE1) {
memset(flow->nsh.context, 0, sizeof(flow->nsh.context));
}
}
static bool
commit_nsh(const struct ovs_key_nsh * flow_nsh, bool use_masked_set,
const struct ovs_key_nsh *key, struct ovs_key_nsh *base,
struct ovs_key_nsh *mask, size_t size,
struct ofpbuf *odp_actions)
{
enum ovs_key_attr attr = OVS_KEY_ATTR_NSH;
if (memcmp(key, base, size) == 0) {
/* Mask bits are set when we have either read or set the corresponding
* values. Masked bits will be exact-matched, no need to set them
* if the value did not actually change. */
return false;
}
bool fully_masked = odp_mask_is_exact(attr, mask, size);
if (use_masked_set && !fully_masked) {
size_t nsh_key_ofs;
struct ovs_nsh_key_base nsh_base;
struct ovs_nsh_key_base nsh_base_mask;
struct ovs_nsh_key_md1 md1;
struct ovs_nsh_key_md1 md1_mask;
size_t offset = nl_msg_start_nested(odp_actions,
OVS_ACTION_ATTR_SET_MASKED);
nsh_base.flags = key->flags;
nsh_base.ttl = key->ttl;
nsh_base.mdtype = key->mdtype;
nsh_base.np = key->np;
nsh_base.path_hdr = key->path_hdr;
nsh_base_mask.flags = mask->flags;
nsh_base_mask.ttl = mask->ttl;
nsh_base_mask.mdtype = mask->mdtype;
nsh_base_mask.np = mask->np;
nsh_base_mask.path_hdr = mask->path_hdr;
/* OVS_KEY_ATTR_NSH keys */
nsh_key_ofs = nl_msg_start_nested(odp_actions, OVS_KEY_ATTR_NSH);
/* put value and mask for OVS_NSH_KEY_ATTR_BASE */
char *data = nl_msg_put_unspec_uninit(odp_actions,
OVS_NSH_KEY_ATTR_BASE,
2 * sizeof(nsh_base));
const char *lkey = (char *)&nsh_base, *lmask = (char *)&nsh_base_mask;
size_t lkey_size = sizeof(nsh_base);
while (lkey_size--) {
*data++ = *lkey++ & *lmask++;
}
lmask = (char *)&nsh_base_mask;
memcpy(data, lmask, sizeof(nsh_base_mask));
switch (key->mdtype) {
case NSH_M_TYPE1:
memcpy(md1.context, key->context, sizeof key->context);
memcpy(md1_mask.context, mask->context, sizeof mask->context);
/* put value and mask for OVS_NSH_KEY_ATTR_MD1 */
data = nl_msg_put_unspec_uninit(odp_actions,
OVS_NSH_KEY_ATTR_MD1,
2 * sizeof(md1));
lkey = (char *)&md1;
lmask = (char *)&md1_mask;
lkey_size = sizeof(md1);
while (lkey_size--) {
*data++ = *lkey++ & *lmask++;
}
lmask = (char *)&md1_mask;
memcpy(data, lmask, sizeof(md1_mask));
break;
case NSH_M_TYPE2:
default:
/* No match support for other MD formats yet. */
break;
}
nl_msg_end_nested(odp_actions, nsh_key_ofs);
nl_msg_end_nested(odp_actions, offset);
} else {
if (!fully_masked) {
memset(mask, 0xff, size);
}
size_t offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_SET);
nsh_key_to_attr(odp_actions, flow_nsh, NULL, 0, false);
nl_msg_end_nested(odp_actions, offset);
}
memcpy(base, key, size);
return true;
}
static void
commit_set_nsh_action(const struct flow *flow, struct flow *base_flow,
struct ofpbuf *odp_actions,
struct flow_wildcards *wc,
bool use_masked)
{
struct ovs_key_nsh key, mask, base;
if (flow->dl_type != htons(ETH_TYPE_NSH) ||
!memcmp(&base_flow->nsh, &flow->nsh, sizeof base_flow->nsh)) {
return;
}
/* Check that mdtype and np remain unchanged. */
ovs_assert(flow->nsh.mdtype == base_flow->nsh.mdtype &&
flow->nsh.np == base_flow->nsh.np);
get_nsh_key(flow, &key, false);
get_nsh_key(base_flow, &base, false);
get_nsh_key(&wc->masks, &mask, true);
mask.mdtype = 0; /* Not writable. */
mask.np = 0; /* Not writable. */
if (commit_nsh(&base_flow->nsh, use_masked, &key, &base, &mask,
sizeof key, odp_actions)) {
put_nsh_key(&base, base_flow, false);
if (mask.mdtype != 0) { /* Mask was changed by commit(). */
put_nsh_key(&mask, &wc->masks, true);
}
}
}
/* TCP, UDP, and SCTP keys have the same layout. */
BUILD_ASSERT_DECL(sizeof(struct ovs_key_tcp) == sizeof(struct ovs_key_udp) &&
sizeof(struct ovs_key_tcp) == sizeof(struct ovs_key_sctp));
static void
get_tp_key(const struct flow *flow, union ovs_key_tp *tp)
{
tp->tcp.tcp_src = flow->tp_src;
tp->tcp.tcp_dst = flow->tp_dst;
}
static void
put_tp_key(const union ovs_key_tp *tp, struct flow *flow)
{
flow->tp_src = tp->tcp.tcp_src;
flow->tp_dst = tp->tcp.tcp_dst;
}
static void
commit_set_port_action(const struct flow *flow, struct flow *base_flow,
struct ofpbuf *odp_actions, struct flow_wildcards *wc,
bool use_masked)
{
enum ovs_key_attr key_type;
union ovs_key_tp key, mask, orig_mask, base;
struct offsetof_sizeof ovs_key_tp_offsetof_sizeof_arr[] =
OVS_KEY_TCP_OFFSETOF_SIZEOF_ARR;
/* Check if 'flow' really has an L3 header. */
if (!flow->nw_proto) {
return;
}
if (!is_ip_any(base_flow)) {
return;
}
if (flow->nw_proto == IPPROTO_TCP) {
key_type = OVS_KEY_ATTR_TCP;
} else if (flow->nw_proto == IPPROTO_UDP) {
key_type = OVS_KEY_ATTR_UDP;
} else if (flow->nw_proto == IPPROTO_SCTP) {
key_type = OVS_KEY_ATTR_SCTP;
} else {
return;
}
get_tp_key(flow, &key);
get_tp_key(base_flow, &base);
get_tp_key(&wc->masks, &mask);
memcpy(&orig_mask, &mask, sizeof mask);
if (commit(key_type, use_masked, &key, &base, &mask, sizeof key,
ovs_key_tp_offsetof_sizeof_arr, odp_actions)) {
put_tp_key(&base, base_flow);
or_masks(&mask, &orig_mask, ovs_key_tp_offsetof_sizeof_arr);
put_tp_key(&mask, &wc->masks);
}
}
static void
commit_set_priority_action(const struct flow *flow, struct flow *base_flow,
struct ofpbuf *odp_actions,
struct flow_wildcards *wc,
bool use_masked)
{
uint32_t key, mask, base;
struct offsetof_sizeof ovs_key_prio_offsetof_sizeof_arr[] = {
{0, sizeof(uint32_t)},
{0, 0}
};
key = flow->skb_priority;
base = base_flow->skb_priority;
mask = wc->masks.skb_priority;
if (commit(OVS_KEY_ATTR_PRIORITY, use_masked, &key, &base, &mask,
sizeof key, ovs_key_prio_offsetof_sizeof_arr, odp_actions)) {
base_flow->skb_priority = base;
wc->masks.skb_priority |= mask;
}
}
static void
commit_set_pkt_mark_action(const struct flow *flow, struct flow *base_flow,
struct ofpbuf *odp_actions,
struct flow_wildcards *wc,
bool use_masked)
{
uint32_t key, mask, base;
struct offsetof_sizeof ovs_key_pkt_mark_offsetof_sizeof_arr[] = {
{0, sizeof(uint32_t)},
{0, 0}
};
key = flow->pkt_mark;
base = base_flow->pkt_mark;
mask = wc->masks.pkt_mark;
if (commit(OVS_KEY_ATTR_SKB_MARK, use_masked, &key, &base, &mask,
sizeof key, ovs_key_pkt_mark_offsetof_sizeof_arr,
odp_actions)) {
base_flow->pkt_mark = base;
wc->masks.pkt_mark |= mask;
}
}
static void
odp_put_pop_nsh_action(struct ofpbuf *odp_actions)
{
nl_msg_put_flag(odp_actions, OVS_ACTION_ATTR_POP_NSH);
}
static void
odp_put_push_nsh_action(struct ofpbuf *odp_actions,
const struct flow *flow,
struct ofpbuf *encap_data)
{
uint8_t * metadata = NULL;
uint8_t md_size = 0;
switch (flow->nsh.mdtype) {
case NSH_M_TYPE2:
if (encap_data) {
ovs_assert(encap_data->size < NSH_CTX_HDRS_MAX_LEN);
metadata = encap_data->data;
md_size = encap_data->size;
} else {
md_size = 0;
}
break;
default:
md_size = 0;
break;
}
size_t offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_PUSH_NSH);
nsh_key_to_attr(odp_actions, &flow->nsh, metadata, md_size, false);
nl_msg_end_nested(odp_actions, offset);
}
static void
commit_encap_decap_action(const struct flow *flow,
struct flow *base_flow,
struct ofpbuf *odp_actions,
struct flow_wildcards *wc,
bool pending_encap, bool pending_decap,
struct ofpbuf *encap_data)
{
if (pending_encap) {
switch (ntohl(flow->packet_type)) {
case PT_ETH: {
/* push_eth */
odp_put_push_eth_action(odp_actions, &flow->dl_src,
&flow->dl_dst);
base_flow->packet_type = flow->packet_type;
base_flow->dl_src = flow->dl_src;
base_flow->dl_dst = flow->dl_dst;
break;
}
case PT_NSH:
/* push_nsh */
odp_put_push_nsh_action(odp_actions, flow, encap_data);
base_flow->packet_type = flow->packet_type;
/* Update all packet headers in base_flow. */
memcpy(&base_flow->dl_dst, &flow->dl_dst,
sizeof(*flow) - offsetof(struct flow, dl_dst));
break;
case PT_MPLS:
case PT_MPLS_MC:
commit_mpls_action(flow, base_flow, odp_actions,
pending_encap);
break;
default:
/* Only the above protocols are supported for encap.
* The check is done at action translation. */
OVS_NOT_REACHED();
}
} else if (pending_decap || flow->packet_type != base_flow->packet_type) {
/* This is an explicit or implicit decap case. */
if (pt_ns(flow->packet_type) == OFPHTN_ETHERTYPE &&
base_flow->packet_type == htonl(PT_ETH)) {
/* Generate pop_eth and continue without recirculation. */
odp_put_pop_eth_action(odp_actions);
base_flow->packet_type = flow->packet_type;
base_flow->dl_src = eth_addr_zero;
base_flow->dl_dst = eth_addr_zero;
} else {
/* All other decap cases require recirculation.
* No need to update the base flow here. */
switch (ntohl(base_flow->packet_type)) {
case PT_NSH:
/* pop_nsh. */
odp_put_pop_nsh_action(odp_actions);
break;
case PT_MPLS:
case PT_MPLS_MC:
commit_mpls_action(flow, base_flow, odp_actions,
pending_encap);
break;
default:
/* Checks are done during translation. */
OVS_NOT_REACHED();
}
}
}
wc->masks.packet_type = OVS_BE32_MAX;
}
/* If any of the flow key data that ODP actions can modify are different in
* 'base' and 'flow', appends ODP actions to 'odp_actions' that change the flow
* key from 'base' into 'flow', and then changes 'base' the same way. Does not
* commit set_tunnel actions. Users should call commit_odp_tunnel_action()
* in addition to this function if needed. Sets fields in 'wc' that are
* used as part of the action.
*
* In the common case, this function returns 0. If the flow key modification
* requires the flow's packets to be forced into the userspace slow path, this
* function returns SLOW_ACTION. This only happens when there is no ODP action
* to modify some field that was actually modified. For example, there is no
* ODP action to modify any ARP field, so such a modification triggers
* SLOW_ACTION. (When this happens, packets that need such modification get
* flushed to userspace and handled there, which works OK but much more slowly
* than if the datapath handled it directly.) */
enum slow_path_reason
commit_odp_actions(const struct flow *flow, struct flow *base,
struct ofpbuf *odp_actions, struct flow_wildcards *wc,
bool use_masked, bool pending_encap, bool pending_decap,
struct ofpbuf *encap_data)
{
/* If you add a field that OpenFlow actions can change, and that is visible
* to the datapath (including all data fields), then you should also add
* code here to commit changes to the field. */
BUILD_ASSERT_DECL(FLOW_WC_SEQ == 42);
enum slow_path_reason slow1, slow2;
bool mpls_done = false;
commit_encap_decap_action(flow, base, odp_actions, wc,
pending_encap, pending_decap, encap_data);
commit_set_ether_action(flow, base, odp_actions, wc, use_masked);
/* Make packet a non-MPLS packet before committing L3/4 actions,
* which would otherwise do nothing. */
if (eth_type_mpls(base->dl_type) && !eth_type_mpls(flow->dl_type)) {
commit_mpls_action(flow, base, odp_actions, false);
mpls_done = true;
}
commit_set_nsh_action(flow, base, odp_actions, wc, use_masked);
slow1 = commit_set_nw_action(flow, base, odp_actions, wc, use_masked);
commit_set_port_action(flow, base, odp_actions, wc, use_masked);
slow2 = commit_set_icmp_action(flow, base, odp_actions, wc);
if (!mpls_done) {
commit_mpls_action(flow, base, odp_actions, false);
}
commit_vlan_action(flow, base, odp_actions, wc);
commit_set_priority_action(flow, base, odp_actions, wc, use_masked);
commit_set_pkt_mark_action(flow, base, odp_actions, wc, use_masked);
return slow1 ? slow1 : slow2;
}
int
odp_vxlan_tun_opts_from_attr(const struct nlattr *tun_attr, ovs_be16 *id,
uint8_t *flags, bool *id_present)
{
static const struct nl_policy vxlan_opts_policy[] = {
[OVS_VXLAN_EXT_GBP] = { .type = NL_A_U32 },
};
struct nlattr *ext[ARRAY_SIZE(vxlan_opts_policy)];
if (!nl_parse_nested(tun_attr, vxlan_opts_policy, ext, ARRAY_SIZE(ext))) {
return EINVAL;
}
if (ext[OVS_VXLAN_EXT_GBP]) {
uint32_t gbp_raw = nl_attr_get_u32(ext[OVS_VXLAN_EXT_GBP]);
odp_decode_gbp_raw(gbp_raw, id, flags);
}
if (id_present) {
*id_present = !!ext[OVS_VXLAN_EXT_GBP];
}
return 0;
}
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