mir/openvswitch
2
0
Fork 0
mirror of https://github.com/openvswitch/ovs synced 2025-10-15 14:17:18 +00:00
Code Issues Releases Wiki Activity
Files
a052b51b3d12cafa4525abc388012382614ca108
openvswitch/ofproto/ofproto-dpif.c
Justin Pettit eadef31329 Prepend "nw_" to "frag" and "tos" elements. 
Most of the members in structures referring to network elements indicate
the layer (e.g., "tl_", "nw_", "tp_").  The "frag" and "tos" members
didn't, so this commit add them.
2011-11-10 18:03:04 -08:00

5454 lines
167 KiB
C
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/*
* Copyright (c) 2009, 2010, 2011 Nicira Networks.
*
* 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 "ofproto/ofproto-provider.h"
#include <errno.h>
#include "autopath.h"
#include "bond.h"
#include "bundle.h"
#include "byte-order.h"
#include "connmgr.h"
#include "coverage.h"
#include "cfm.h"
#include "dpif.h"
#include "dynamic-string.h"
#include "fail-open.h"
#include "hmapx.h"
#include "lacp.h"
#include "learn.h"
#include "mac-learning.h"
#include "multipath.h"
#include "netdev.h"
#include "netlink.h"
#include "nx-match.h"
#include "odp-util.h"
#include "ofp-util.h"
#include "ofpbuf.h"
#include "ofp-print.h"
#include "ofproto-dpif-sflow.h"
#include "poll-loop.h"
#include "timer.h"
#include "unaligned.h"
#include "unixctl.h"
#include "vlan-bitmap.h"
#include "vlog.h"
VLOG_DEFINE_THIS_MODULE(ofproto_dpif);
COVERAGE_DEFINE(ofproto_dpif_ctlr_action);
COVERAGE_DEFINE(ofproto_dpif_expired);
COVERAGE_DEFINE(ofproto_dpif_no_packet_in);
COVERAGE_DEFINE(ofproto_dpif_xlate);
COVERAGE_DEFINE(facet_changed_rule);
COVERAGE_DEFINE(facet_invalidated);
COVERAGE_DEFINE(facet_revalidate);
COVERAGE_DEFINE(facet_unexpected);
/* Maximum depth of flow table recursion (due to resubmit actions) in a
* flow translation. */
#define MAX_RESUBMIT_RECURSION 32
/* Number of implemented OpenFlow tables. */
enum { N_TABLES = 255 };
BUILD_ASSERT_DECL(N_TABLES >= 1 && N_TABLES <= 255);
struct ofport_dpif;
struct ofproto_dpif;
struct rule_dpif {
struct rule up;
long long int used; /* Time last used; time created if not used. */
/* These statistics:
*
* - Do include packets and bytes from facets that have been deleted or
* whose own statistics have been folded into the rule.
*
* - Do include packets and bytes sent "by hand" that were accounted to
* the rule without any facet being involved (this is a rare corner
* case in rule_execute()).
*
* - Do not include packet or bytes that can be obtained from any facet's
* packet_count or byte_count member or that can be obtained from the
* datapath by, e.g., dpif_flow_get() for any facet.
*/
uint64_t packet_count; /* Number of packets received. */
uint64_t byte_count; /* Number of bytes received. */
tag_type tag; /* Caches rule_calculate_tag() result. */
struct list facets; /* List of "struct facet"s. */
};
static struct rule_dpif *rule_dpif_cast(const struct rule *rule)
{
return rule ? CONTAINER_OF(rule, struct rule_dpif, up) : NULL;
}
static struct rule_dpif *rule_dpif_lookup(struct ofproto_dpif *,
const struct flow *, uint8_t table);
#define MAX_MIRRORS 32
typedef uint32_t mirror_mask_t;
#define MIRROR_MASK_C(X) UINT32_C(X)
BUILD_ASSERT_DECL(sizeof(mirror_mask_t) * CHAR_BIT >= MAX_MIRRORS);
struct ofmirror {
struct ofproto_dpif *ofproto; /* Owning ofproto. */
size_t idx; /* In ofproto's "mirrors" array. */
void *aux; /* Key supplied by ofproto's client. */
char *name; /* Identifier for log messages. */
/* Selection criteria. */
struct hmapx srcs; /* Contains "struct ofbundle *"s. */
struct hmapx dsts; /* Contains "struct ofbundle *"s. */
unsigned long *vlans; /* Bitmap of chosen VLANs, NULL selects all. */
/* Output (mutually exclusive). */
struct ofbundle *out; /* Output port or NULL. */
int out_vlan; /* Output VLAN or -1. */
};
static void mirror_destroy(struct ofmirror *);
/* A group of one or more OpenFlow ports. */
#define OFBUNDLE_FLOOD ((struct ofbundle *) 1)
struct ofbundle {
struct ofproto_dpif *ofproto; /* Owning ofproto. */
struct hmap_node hmap_node; /* In struct ofproto's "bundles" hmap. */
void *aux; /* Key supplied by ofproto's client. */
char *name; /* Identifier for log messages. */
/* Configuration. */
struct list ports; /* Contains "struct ofport"s. */
enum port_vlan_mode vlan_mode; /* VLAN mode */
int vlan; /* -1=trunk port, else a 12-bit VLAN ID. */
unsigned long *trunks; /* Bitmap of trunked VLANs, if 'vlan' == -1.
* NULL if all VLANs are trunked. */
struct lacp *lacp; /* LACP if LACP is enabled, otherwise NULL. */
struct bond *bond; /* Nonnull iff more than one port. */
/* Status. */
bool floodable; /* True if no port has OFPPC_NO_FLOOD set. */
/* Port mirroring info. */
mirror_mask_t src_mirrors; /* Mirrors triggered when packet received. */
mirror_mask_t dst_mirrors; /* Mirrors triggered when packet sent. */
mirror_mask_t mirror_out; /* Mirrors that output to this bundle. */
};
static void bundle_remove(struct ofport *);
static void bundle_update(struct ofbundle *);
static void bundle_destroy(struct ofbundle *);
static void bundle_del_port(struct ofport_dpif *);
static void bundle_run(struct ofbundle *);
static void bundle_wait(struct ofbundle *);
static void stp_run(struct ofproto_dpif *ofproto);
static void stp_wait(struct ofproto_dpif *ofproto);
struct action_xlate_ctx {
/* action_xlate_ctx_init() initializes these members. */
/* The ofproto. */
struct ofproto_dpif *ofproto;
/* Flow to which the OpenFlow actions apply. xlate_actions() will modify
* this flow when actions change header fields. */
struct flow flow;
/* The packet corresponding to 'flow', or a null pointer if we are
* revalidating without a packet to refer to. */
const struct ofpbuf *packet;
/* Should OFPP_NORMAL MAC learning and NXAST_LEARN actions execute? We
* want to execute them if we are actually processing a packet, or if we
* are accounting for packets that the datapath has processed, but not if
* we are just revalidating. */
bool may_learn;
/* If nonnull, called just before executing a resubmit action.
*
* This is normally null so the client has to set it manually after
* calling action_xlate_ctx_init(). */
void (*resubmit_hook)(struct action_xlate_ctx *, struct rule_dpif *);
/* xlate_actions() initializes and uses these members. The client might want
* to look at them after it returns. */
struct ofpbuf *odp_actions; /* Datapath actions. */
tag_type tags; /* Tags associated with actions. */
bool may_set_up_flow; /* True ordinarily; false if the actions must
* be reassessed for every packet. */
bool has_learn; /* Actions include NXAST_LEARN? */
bool has_normal; /* Actions output to OFPP_NORMAL? */
uint16_t nf_output_iface; /* Output interface index for NetFlow. */
/* xlate_actions() initializes and uses these members, but the client has no
* reason to look at them. */
int recurse; /* Recursion level, via xlate_table_action. */
struct flow base_flow; /* Flow at the last commit. */
uint32_t original_priority; /* Priority when packet arrived. */
uint8_t table_id; /* OpenFlow table ID where flow was found. */
uint32_t sflow_n_outputs; /* Number of output ports. */
uint16_t sflow_odp_port; /* Output port for composing sFlow action. */
uint16_t user_cookie_offset;/* Used for user_action_cookie fixup. */
bool exit; /* No further actions should be processed. */
};
static void action_xlate_ctx_init(struct action_xlate_ctx *,
struct ofproto_dpif *, const struct flow *,
const struct ofpbuf *);
static struct ofpbuf *xlate_actions(struct action_xlate_ctx *,
const union ofp_action *in, size_t n_in);
/* An exact-match instantiation of an OpenFlow flow. */
struct facet {
long long int used; /* Time last used; time created if not used. */
/* These statistics:
*
* - Do include packets and bytes sent "by hand", e.g. with
* dpif_execute().
*
* - Do include packets and bytes that were obtained from the datapath
* when its statistics were reset (e.g. dpif_flow_put() with
* DPIF_FP_ZERO_STATS).
*/
uint64_t packet_count; /* Number of packets received. */
uint64_t byte_count; /* Number of bytes received. */
uint64_t dp_packet_count; /* Last known packet count in the datapath. */
uint64_t dp_byte_count; /* Last known byte count in the datapath. */
uint64_t rs_packet_count; /* Packets pushed to resubmit children. */
uint64_t rs_byte_count; /* Bytes pushed to resubmit children. */
long long int rs_used; /* Used time pushed to resubmit children. */
uint64_t accounted_bytes; /* Bytes processed by facet_account(). */
struct hmap_node hmap_node; /* In owning ofproto's 'facets' hmap. */
struct list list_node; /* In owning rule's 'facets' list. */
struct rule_dpif *rule; /* Owning rule. */
struct flow flow; /* Exact-match flow. */
bool installed; /* Installed in datapath? */
bool may_install; /* True ordinarily; false if actions must
* be reassessed for every packet. */
bool has_learn; /* Actions include NXAST_LEARN? */
bool has_normal; /* Actions output to OFPP_NORMAL? */
size_t actions_len; /* Number of bytes in actions[]. */
struct nlattr *actions; /* Datapath actions. */
tag_type tags; /* Tags. */
struct netflow_flow nf_flow; /* Per-flow NetFlow tracking data. */
};
static struct facet *facet_create(struct rule_dpif *, const struct flow *);
static void facet_remove(struct ofproto_dpif *, struct facet *);
static void facet_free(struct facet *);
static struct facet *facet_find(struct ofproto_dpif *, const struct flow *);
static struct facet *facet_lookup_valid(struct ofproto_dpif *,
const struct flow *);
static bool facet_revalidate(struct ofproto_dpif *, struct facet *);
static bool execute_controller_action(struct ofproto_dpif *,
const struct flow *,
const struct nlattr *odp_actions,
size_t actions_len,
struct ofpbuf *packet);
static void facet_execute(struct ofproto_dpif *, struct facet *,
struct ofpbuf *packet);
static int facet_put__(struct ofproto_dpif *, struct facet *,
const struct nlattr *actions, size_t actions_len,
struct dpif_flow_stats *);
static void facet_install(struct ofproto_dpif *, struct facet *,
bool zero_stats);
static void facet_uninstall(struct ofproto_dpif *, struct facet *);
static void facet_flush_stats(struct ofproto_dpif *, struct facet *);
static void facet_make_actions(struct ofproto_dpif *, struct facet *,
const struct ofpbuf *packet);
static void facet_update_time(struct ofproto_dpif *, struct facet *,
long long int used);
static void facet_update_stats(struct ofproto_dpif *, struct facet *,
const struct dpif_flow_stats *);
static void facet_reset_counters(struct facet *);
static void facet_reset_dp_stats(struct facet *, struct dpif_flow_stats *);
static void facet_push_stats(struct facet *);
static void facet_account(struct ofproto_dpif *, struct facet *);
static bool facet_is_controller_flow(struct facet *);
static void flow_push_stats(const struct rule_dpif *,
struct flow *, uint64_t packets, uint64_t bytes,
long long int used);
static uint32_t rule_calculate_tag(const struct flow *,
const struct flow_wildcards *,
uint32_t basis);
static void rule_invalidate(const struct rule_dpif *);
struct ofport_dpif {
struct ofport up;
uint32_t odp_port;
struct ofbundle *bundle; /* Bundle that contains this port, if any. */
struct list bundle_node; /* In struct ofbundle's "ports" list. */
struct cfm *cfm; /* Connectivity Fault Management, if any. */
tag_type tag; /* Tag associated with this port. */
uint32_t bond_stable_id; /* stable_id to use as bond slave, or 0. */
bool may_enable; /* May be enabled in bonds. */
struct stp_port *stp_port; /* Spanning Tree Protocol, if any. */
enum stp_state stp_state; /* Always STP_DISABLED if STP not in use. */
long long int stp_state_entered;
};
static struct ofport_dpif *
ofport_dpif_cast(const struct ofport *ofport)
{
assert(ofport->ofproto->ofproto_class == &ofproto_dpif_class);
return ofport ? CONTAINER_OF(ofport, struct ofport_dpif, up) : NULL;
}
static void port_run(struct ofport_dpif *);
static void port_wait(struct ofport_dpif *);
static int set_cfm(struct ofport *, const struct cfm_settings *);
struct dpif_completion {
struct list list_node;
struct ofoperation *op;
};
/* Extra information about a classifier table.
* Currently used just for optimized flow revalidation. */
struct table_dpif {
/* If either of these is nonnull, then this table has a form that allows
* flows to be tagged to avoid revalidating most flows for the most common
* kinds of flow table changes. */
struct cls_table *catchall_table; /* Table that wildcards all fields. */
struct cls_table *other_table; /* Table with any other wildcard set. */
uint32_t basis; /* Keeps each table's tags separate. */
};
struct ofproto_dpif {
struct ofproto up;
struct dpif *dpif;
int max_ports;
/* Statistics. */
uint64_t n_matches;
/* Bridging. */
struct netflow *netflow;
struct dpif_sflow *sflow;
struct hmap bundles; /* Contains "struct ofbundle"s. */
struct mac_learning *ml;
struct ofmirror *mirrors[MAX_MIRRORS];
bool has_bonded_bundles;
/* Expiration. */
struct timer next_expiration;
/* Facets. */
struct hmap facets;
/* Revalidation. */
struct table_dpif tables[N_TABLES];
bool need_revalidate;
struct tag_set revalidate_set;
/* Support for debugging async flow mods. */
struct list completions;
bool has_bundle_action; /* True when the first bundle action appears. */
/* Spanning tree. */
struct stp *stp;
long long int stp_last_tick;
};
/* Defer flow mod completion until "ovs-appctl ofproto/unclog"? (Useful only
* for debugging the asynchronous flow_mod implementation.) */
static bool clogged;
static void ofproto_dpif_unixctl_init(void);
static struct ofproto_dpif *
ofproto_dpif_cast(const struct ofproto *ofproto)
{
assert(ofproto->ofproto_class == &ofproto_dpif_class);
return CONTAINER_OF(ofproto, struct ofproto_dpif, up);
}
static struct ofport_dpif *get_ofp_port(struct ofproto_dpif *,
uint16_t ofp_port);
static struct ofport_dpif *get_odp_port(struct ofproto_dpif *,
uint32_t odp_port);
/* Packet processing. */
static void update_learning_table(struct ofproto_dpif *,
const struct flow *, int vlan,
struct ofbundle *);
static bool is_admissible(struct ofproto_dpif *, const struct flow *,
bool have_packet, tag_type *, int *vlanp,
struct ofbundle **in_bundlep);
/* Upcalls. */
#define FLOW_MISS_MAX_BATCH 50
static void handle_upcall(struct ofproto_dpif *, struct dpif_upcall *);
static void handle_miss_upcalls(struct ofproto_dpif *,
struct dpif_upcall *, size_t n);
/* Flow expiration. */
static int expire(struct ofproto_dpif *);
/* Utilities. */
static int send_packet(struct ofproto_dpif *, uint32_t odp_port,
const struct ofpbuf *packet);
static size_t
compose_sflow_action(const struct ofproto_dpif *, struct ofpbuf *odp_actions,
const struct flow *, uint32_t odp_port);
/* Global variables. */
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
/* Factory functions. */
static void
enumerate_types(struct sset *types)
{
dp_enumerate_types(types);
}
static int
enumerate_names(const char *type, struct sset *names)
{
return dp_enumerate_names(type, names);
}
static int
del(const char *type, const char *name)
{
struct dpif *dpif;
int error;
error = dpif_open(name, type, &dpif);
if (!error) {
error = dpif_delete(dpif);
dpif_close(dpif);
}
return error;
}
/* Basic life-cycle. */
static struct ofproto *
alloc(void)
{
struct ofproto_dpif *ofproto = xmalloc(sizeof *ofproto);
return &ofproto->up;
}
static void
dealloc(struct ofproto *ofproto_)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
free(ofproto);
}
static int
construct(struct ofproto *ofproto_, int *n_tablesp)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
const char *name = ofproto->up.name;
int error;
int i;
error = dpif_create_and_open(name, ofproto->up.type, &ofproto->dpif);
if (error) {
VLOG_ERR("failed to open datapath %s: %s", name, strerror(error));
return error;
}
ofproto->max_ports = dpif_get_max_ports(ofproto->dpif);
ofproto->n_matches = 0;
dpif_flow_flush(ofproto->dpif);
dpif_recv_purge(ofproto->dpif);
error = dpif_recv_set_mask(ofproto->dpif,
((1u << DPIF_UC_MISS) |
(1u << DPIF_UC_ACTION)));
if (error) {
VLOG_ERR("failed to listen on datapath %s: %s", name, strerror(error));
dpif_close(ofproto->dpif);
return error;
}
ofproto->netflow = NULL;
ofproto->sflow = NULL;
ofproto->stp = NULL;
hmap_init(&ofproto->bundles);
ofproto->ml = mac_learning_create();
for (i = 0; i < MAX_MIRRORS; i++) {
ofproto->mirrors[i] = NULL;
}
ofproto->has_bonded_bundles = false;
timer_set_duration(&ofproto->next_expiration, 1000);
hmap_init(&ofproto->facets);
for (i = 0; i < N_TABLES; i++) {
struct table_dpif *table = &ofproto->tables[i];
table->catchall_table = NULL;
table->other_table = NULL;
table->basis = random_uint32();
}
ofproto->need_revalidate = false;
tag_set_init(&ofproto->revalidate_set);
list_init(&ofproto->completions);
ofproto_dpif_unixctl_init();
ofproto->has_bundle_action = false;
*n_tablesp = N_TABLES;
return 0;
}
static void
complete_operations(struct ofproto_dpif *ofproto)
{
struct dpif_completion *c, *next;
LIST_FOR_EACH_SAFE (c, next, list_node, &ofproto->completions) {
ofoperation_complete(c->op, 0);
list_remove(&c->list_node);
free(c);
}
}
static void
destruct(struct ofproto *ofproto_)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
struct rule_dpif *rule, *next_rule;
struct classifier *table;
int i;
complete_operations(ofproto);
OFPROTO_FOR_EACH_TABLE (table, &ofproto->up) {
struct cls_cursor cursor;
cls_cursor_init(&cursor, table, NULL);
CLS_CURSOR_FOR_EACH_SAFE (rule, next_rule, up.cr, &cursor) {
ofproto_rule_destroy(&rule->up);
}
}
for (i = 0; i < MAX_MIRRORS; i++) {
mirror_destroy(ofproto->mirrors[i]);
}
netflow_destroy(ofproto->netflow);
dpif_sflow_destroy(ofproto->sflow);
hmap_destroy(&ofproto->bundles);
mac_learning_destroy(ofproto->ml);
hmap_destroy(&ofproto->facets);
dpif_close(ofproto->dpif);
}
static int
run(struct ofproto *ofproto_)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
struct dpif_upcall misses[FLOW_MISS_MAX_BATCH];
struct ofport_dpif *ofport;
struct ofbundle *bundle;
size_t n_misses;
int i;
if (!clogged) {
complete_operations(ofproto);
}
dpif_run(ofproto->dpif);
n_misses = 0;
for (i = 0; i < FLOW_MISS_MAX_BATCH; i++) {
struct dpif_upcall *upcall = &misses[n_misses];
int error;
error = dpif_recv(ofproto->dpif, upcall);
if (error) {
if (error == ENODEV && n_misses == 0) {
return error;
}
break;
}
if (upcall->type == DPIF_UC_MISS) {
/* Handle it later. */
n_misses++;
} else {
handle_upcall(ofproto, upcall);
}
}
handle_miss_upcalls(ofproto, misses, n_misses);
if (timer_expired(&ofproto->next_expiration)) {
int delay = expire(ofproto);
timer_set_duration(&ofproto->next_expiration, delay);
}
if (ofproto->netflow) {
netflow_run(ofproto->netflow);
}
if (ofproto->sflow) {
dpif_sflow_run(ofproto->sflow);
}
HMAP_FOR_EACH (ofport, up.hmap_node, &ofproto->up.ports) {
port_run(ofport);
}
HMAP_FOR_EACH (bundle, hmap_node, &ofproto->bundles) {
bundle_run(bundle);
}
stp_run(ofproto);
mac_learning_run(ofproto->ml, &ofproto->revalidate_set);
/* Now revalidate if there's anything to do. */
if (ofproto->need_revalidate
|| !tag_set_is_empty(&ofproto->revalidate_set)) {
struct tag_set revalidate_set = ofproto->revalidate_set;
bool revalidate_all = ofproto->need_revalidate;
struct facet *facet, *next;
/* Clear the revalidation flags. */
tag_set_init(&ofproto->revalidate_set);
ofproto->need_revalidate = false;
HMAP_FOR_EACH_SAFE (facet, next, hmap_node, &ofproto->facets) {
if (revalidate_all
|| tag_set_intersects(&revalidate_set, facet->tags)) {
facet_revalidate(ofproto, facet);
}
}
}
return 0;
}
static void
wait(struct ofproto *ofproto_)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
struct ofport_dpif *ofport;
struct ofbundle *bundle;
if (!clogged && !list_is_empty(&ofproto->completions)) {
poll_immediate_wake();
}
dpif_wait(ofproto->dpif);
dpif_recv_wait(ofproto->dpif);
if (ofproto->sflow) {
dpif_sflow_wait(ofproto->sflow);
}
if (!tag_set_is_empty(&ofproto->revalidate_set)) {
poll_immediate_wake();
}
HMAP_FOR_EACH (ofport, up.hmap_node, &ofproto->up.ports) {
port_wait(ofport);
}
HMAP_FOR_EACH (bundle, hmap_node, &ofproto->bundles) {
bundle_wait(bundle);
}
mac_learning_wait(ofproto->ml);
stp_wait(ofproto);
if (ofproto->need_revalidate) {
/* Shouldn't happen, but if it does just go around again. */
VLOG_DBG_RL(&rl, "need revalidate in ofproto_wait_cb()");
poll_immediate_wake();
} else {
timer_wait(&ofproto->next_expiration);
}
}
static void
flush(struct ofproto *ofproto_)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
struct facet *facet, *next_facet;
HMAP_FOR_EACH_SAFE (facet, next_facet, hmap_node, &ofproto->facets) {
/* Mark the facet as not installed so that facet_remove() doesn't
* bother trying to uninstall it. There is no point in uninstalling it
* individually since we are about to blow away all the facets with
* dpif_flow_flush(). */
facet->installed = false;
facet->dp_packet_count = 0;
facet->dp_byte_count = 0;
facet_remove(ofproto, facet);
}
dpif_flow_flush(ofproto->dpif);
}
static void
get_features(struct ofproto *ofproto_ OVS_UNUSED,
bool *arp_match_ip, uint32_t *actions)
{
*arp_match_ip = true;
*actions = ((1u << OFPAT_OUTPUT) |
(1u << OFPAT_SET_VLAN_VID) |
(1u << OFPAT_SET_VLAN_PCP) |
(1u << OFPAT_STRIP_VLAN) |
(1u << OFPAT_SET_DL_SRC) |
(1u << OFPAT_SET_DL_DST) |
(1u << OFPAT_SET_NW_SRC) |
(1u << OFPAT_SET_NW_DST) |
(1u << OFPAT_SET_NW_TOS) |
(1u << OFPAT_SET_TP_SRC) |
(1u << OFPAT_SET_TP_DST) |
(1u << OFPAT_ENQUEUE));
}
static void
get_tables(struct ofproto *ofproto_, struct ofp_table_stats *ots)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
struct dpif_dp_stats s;
strcpy(ots->name, "classifier");
dpif_get_dp_stats(ofproto->dpif, &s);
put_32aligned_be64(&ots->lookup_count, htonll(s.n_hit + s.n_missed));
put_32aligned_be64(&ots->matched_count,
htonll(s.n_hit + ofproto->n_matches));
}
static int
set_netflow(struct ofproto *ofproto_,
const struct netflow_options *netflow_options)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
if (netflow_options) {
if (!ofproto->netflow) {
ofproto->netflow = netflow_create();
}
return netflow_set_options(ofproto->netflow, netflow_options);
} else {
netflow_destroy(ofproto->netflow);
ofproto->netflow = NULL;
return 0;
}
}
static struct ofport *
port_alloc(void)
{
struct ofport_dpif *port = xmalloc(sizeof *port);
return &port->up;
}
static void
port_dealloc(struct ofport *port_)
{
struct ofport_dpif *port = ofport_dpif_cast(port_);
free(port);
}
static int
port_construct(struct ofport *port_)
{
struct ofport_dpif *port = ofport_dpif_cast(port_);
struct ofproto_dpif *ofproto = ofproto_dpif_cast(port->up.ofproto);
ofproto->need_revalidate = true;
port->odp_port = ofp_port_to_odp_port(port->up.ofp_port);
port->bundle = NULL;
port->cfm = NULL;
port->tag = tag_create_random();
port->may_enable = true;
port->stp_port = NULL;
port->stp_state = STP_DISABLED;
if (ofproto->sflow) {
dpif_sflow_add_port(ofproto->sflow, port->odp_port,
netdev_get_name(port->up.netdev));
}
return 0;
}
static void
port_destruct(struct ofport *port_)
{
struct ofport_dpif *port = ofport_dpif_cast(port_);
struct ofproto_dpif *ofproto = ofproto_dpif_cast(port->up.ofproto);
ofproto->need_revalidate = true;
bundle_remove(port_);
set_cfm(port_, NULL);
if (ofproto->sflow) {
dpif_sflow_del_port(ofproto->sflow, port->odp_port);
}
}
static void
port_modified(struct ofport *port_)
{
struct ofport_dpif *port = ofport_dpif_cast(port_);
if (port->bundle && port->bundle->bond) {
bond_slave_set_netdev(port->bundle->bond, port, port->up.netdev);
}
}
static void
port_reconfigured(struct ofport *port_, ovs_be32 old_config)
{
struct ofport_dpif *port = ofport_dpif_cast(port_);
struct ofproto_dpif *ofproto = ofproto_dpif_cast(port->up.ofproto);
ovs_be32 changed = old_config ^ port->up.opp.config;
if (changed & htonl(OFPPC_NO_RECV | OFPPC_NO_RECV_STP |
OFPPC_NO_FWD | OFPPC_NO_FLOOD)) {
ofproto->need_revalidate = true;
if (changed & htonl(OFPPC_NO_FLOOD) && port->bundle) {
bundle_update(port->bundle);
}
}
}
static int
set_sflow(struct ofproto *ofproto_,
const struct ofproto_sflow_options *sflow_options)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
struct dpif_sflow *ds = ofproto->sflow;
if (sflow_options) {
if (!ds) {
struct ofport_dpif *ofport;
ds = ofproto->sflow = dpif_sflow_create(ofproto->dpif);
HMAP_FOR_EACH (ofport, up.hmap_node, &ofproto->up.ports) {
dpif_sflow_add_port(ds, ofport->odp_port,
netdev_get_name(ofport->up.netdev));
}
ofproto->need_revalidate = true;
}
dpif_sflow_set_options(ds, sflow_options);
} else {
if (ds) {
dpif_sflow_destroy(ds);
ofproto->need_revalidate = true;
ofproto->sflow = NULL;
}
}
return 0;
}
static int
set_cfm(struct ofport *ofport_, const struct cfm_settings *s)
{
struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
int error;
if (!s) {
error = 0;
} else {
if (!ofport->cfm) {
struct ofproto_dpif *ofproto;
ofproto = ofproto_dpif_cast(ofport->up.ofproto);
ofproto->need_revalidate = true;
ofport->cfm = cfm_create(netdev_get_name(ofport->up.netdev));
}
if (cfm_configure(ofport->cfm, s)) {
return 0;
}
error = EINVAL;
}
cfm_destroy(ofport->cfm);
ofport->cfm = NULL;
return error;
}
static int
get_cfm_fault(const struct ofport *ofport_)
{
struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
return ofport->cfm ? cfm_get_fault(ofport->cfm) : -1;
}
static int
get_cfm_remote_mpids(const struct ofport *ofport_, const uint64_t **rmps,
size_t *n_rmps)
{
struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
if (ofport->cfm) {
cfm_get_remote_mpids(ofport->cfm, rmps, n_rmps);
return 0;
} else {
return -1;
}
}
/* Spanning Tree. */
static void
send_bpdu_cb(struct ofpbuf *pkt, int port_num, void *ofproto_)
{
struct ofproto_dpif *ofproto = ofproto_;
struct stp_port *sp = stp_get_port(ofproto->stp, port_num);
struct ofport_dpif *ofport;
ofport = stp_port_get_aux(sp);
if (!ofport) {
VLOG_WARN_RL(&rl, "%s: cannot send BPDU on unknown port %d",
ofproto->up.name, port_num);
} else {
struct eth_header *eth = pkt->l2;
netdev_get_etheraddr(ofport->up.netdev, eth->eth_src);
if (eth_addr_is_zero(eth->eth_src)) {
VLOG_WARN_RL(&rl, "%s: cannot send BPDU on port %d "
"with unknown MAC", ofproto->up.name, port_num);
} else {
send_packet(ofproto_dpif_cast(ofport->up.ofproto),
ofport->odp_port, pkt);
}
}
ofpbuf_delete(pkt);
}
/* Configures STP on 'ofproto_' using the settings defined in 's'. */
static int
set_stp(struct ofproto *ofproto_, const struct ofproto_stp_settings *s)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
/* Only revalidate flows if the configuration changed. */
if (!s != !ofproto->stp) {
ofproto->need_revalidate = true;
}
if (s) {
if (!ofproto->stp) {
ofproto->stp = stp_create(ofproto_->name, s->system_id,
send_bpdu_cb, ofproto);
ofproto->stp_last_tick = time_msec();
}
stp_set_bridge_id(ofproto->stp, s->system_id);
stp_set_bridge_priority(ofproto->stp, s->priority);
stp_set_hello_time(ofproto->stp, s->hello_time);
stp_set_max_age(ofproto->stp, s->max_age);
stp_set_forward_delay(ofproto->stp, s->fwd_delay);
} else {
stp_destroy(ofproto->stp);
ofproto->stp = NULL;
}
return 0;
}
static int
get_stp_status(struct ofproto *ofproto_, struct ofproto_stp_status *s)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
if (ofproto->stp) {
s->enabled = true;
s->bridge_id = stp_get_bridge_id(ofproto->stp);
s->designated_root = stp_get_designated_root(ofproto->stp);
s->root_path_cost = stp_get_root_path_cost(ofproto->stp);
} else {
s->enabled = false;
}
return 0;
}
static void
update_stp_port_state(struct ofport_dpif *ofport)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport->up.ofproto);
enum stp_state state;
/* Figure out new state. */
state = ofport->stp_port ? stp_port_get_state(ofport->stp_port)
: STP_DISABLED;
/* Update state. */
if (ofport->stp_state != state) {
ovs_be32 of_state;
bool fwd_change;
VLOG_DBG_RL(&rl, "port %s: STP state changed from %s to %s",
netdev_get_name(ofport->up.netdev),
stp_state_name(ofport->stp_state),
stp_state_name(state));
if (stp_learn_in_state(ofport->stp_state)
!= stp_learn_in_state(state)) {
/* xxx Learning action flows should also be flushed. */
mac_learning_flush(ofproto->ml);
}
fwd_change = stp_forward_in_state(ofport->stp_state)
!= stp_forward_in_state(state);
ofproto->need_revalidate = true;
ofport->stp_state = state;
ofport->stp_state_entered = time_msec();
if (fwd_change) {
bundle_update(ofport->bundle);
}
/* Update the STP state bits in the OpenFlow port description. */
of_state = (ofport->up.opp.state & htonl(~OFPPS_STP_MASK))
| htonl(state == STP_LISTENING ? OFPPS_STP_LISTEN
: state == STP_LEARNING ? OFPPS_STP_LEARN
: state == STP_FORWARDING ? OFPPS_STP_FORWARD
: state == STP_BLOCKING ? OFPPS_STP_BLOCK
: 0);
ofproto_port_set_state(&ofport->up, of_state);
}
}
/* Configures STP on 'ofport_' using the settings defined in 's'. The
* caller is responsible for assigning STP port numbers and ensuring
* there are no duplicates. */
static int
set_stp_port(struct ofport *ofport_,
const struct ofproto_port_stp_settings *s)
{
struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport->up.ofproto);
struct stp_port *sp = ofport->stp_port;
if (!s || !s->enable) {
if (sp) {
ofport->stp_port = NULL;
stp_port_disable(sp);
update_stp_port_state(ofport);
}
return 0;
} else if (sp && stp_port_no(sp) != s->port_num
&& ofport == stp_port_get_aux(sp)) {
/* The port-id changed, so disable the old one if it's not
* already in use by another port. */
stp_port_disable(sp);
}
sp = ofport->stp_port = stp_get_port(ofproto->stp, s->port_num);
stp_port_enable(sp);
stp_port_set_aux(sp, ofport);
stp_port_set_priority(sp, s->priority);
stp_port_set_path_cost(sp, s->path_cost);
update_stp_port_state(ofport);
return 0;
}
static int
get_stp_port_status(struct ofport *ofport_,
struct ofproto_port_stp_status *s)
{
struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport->up.ofproto);
struct stp_port *sp = ofport->stp_port;
if (!ofproto->stp || !sp) {
s->enabled = false;
return 0;
}
s->enabled = true;
s->port_id = stp_port_get_id(sp);
s->state = stp_port_get_state(sp);
s->sec_in_state = (time_msec() - ofport->stp_state_entered) / 1000;
s->role = stp_port_get_role(sp);
return 0;
}
static void
stp_run(struct ofproto_dpif *ofproto)
{
if (ofproto->stp) {
long long int now = time_msec();
long long int elapsed = now - ofproto->stp_last_tick;
struct stp_port *sp;
if (elapsed > 0) {
stp_tick(ofproto->stp, MIN(INT_MAX, elapsed));
ofproto->stp_last_tick = now;
}
while (stp_get_changed_port(ofproto->stp, &sp)) {
struct ofport_dpif *ofport = stp_port_get_aux(sp);
if (ofport) {
update_stp_port_state(ofport);
}
}
}
}
static void
stp_wait(struct ofproto_dpif *ofproto)
{
if (ofproto->stp) {
poll_timer_wait(1000);
}
}
/* Returns true if STP should process 'flow'. */
static bool
stp_should_process_flow(const struct flow *flow)
{
return eth_addr_equals(flow->dl_dst, eth_addr_stp);
}
static void
stp_process_packet(const struct ofport_dpif *ofport,
const struct ofpbuf *packet)
{
struct ofpbuf payload = *packet;
struct eth_header *eth = payload.data;
struct stp_port *sp = ofport->stp_port;
/* Sink packets on ports that have STP disabled when the bridge has
* STP enabled. */
if (!sp || stp_port_get_state(sp) == STP_DISABLED) {
return;
}
/* Trim off padding on payload. */
if (payload.size > ntohs(eth->eth_type) + ETH_HEADER_LEN) {
payload.size = ntohs(eth->eth_type) + ETH_HEADER_LEN;
}
if (ofpbuf_try_pull(&payload, ETH_HEADER_LEN + LLC_HEADER_LEN)) {
stp_received_bpdu(sp, payload.data, payload.size);
}
}
/* Bundles. */
/* Expires all MAC learning entries associated with 'port' and forces ofproto
* to revalidate every flow. */
static void
bundle_flush_macs(struct ofbundle *bundle)
{
struct ofproto_dpif *ofproto = bundle->ofproto;
struct mac_learning *ml = ofproto->ml;
struct mac_entry *mac, *next_mac;
ofproto->need_revalidate = true;
LIST_FOR_EACH_SAFE (mac, next_mac, lru_node, &ml->lrus) {
if (mac->port.p == bundle) {
mac_learning_expire(ml, mac);
}
}
}
static struct ofbundle *
bundle_lookup(const struct ofproto_dpif *ofproto, void *aux)
{
struct ofbundle *bundle;
HMAP_FOR_EACH_IN_BUCKET (bundle, hmap_node, hash_pointer(aux, 0),
&ofproto->bundles) {
if (bundle->aux == aux) {
return bundle;
}
}
return NULL;
}
/* Looks up each of the 'n_auxes' pointers in 'auxes' as bundles and adds the
* ones that are found to 'bundles'. */
static void
bundle_lookup_multiple(struct ofproto_dpif *ofproto,
void **auxes, size_t n_auxes,
struct hmapx *bundles)
{
size_t i;
hmapx_init(bundles);
for (i = 0; i < n_auxes; i++) {
struct ofbundle *bundle = bundle_lookup(ofproto, auxes[i]);
if (bundle) {
hmapx_add(bundles, bundle);
}
}
}
static void
bundle_update(struct ofbundle *bundle)
{
struct ofport_dpif *port;
bundle->floodable = true;
LIST_FOR_EACH (port, bundle_node, &bundle->ports) {
if (port->up.opp.config & htonl(OFPPC_NO_FLOOD)
|| !stp_forward_in_state(port->stp_state)) {
bundle->floodable = false;
break;
}
}
}
static void
bundle_del_port(struct ofport_dpif *port)
{
struct ofbundle *bundle = port->bundle;
bundle->ofproto->need_revalidate = true;
list_remove(&port->bundle_node);
port->bundle = NULL;
if (bundle->lacp) {
lacp_slave_unregister(bundle->lacp, port);
}
if (bundle->bond) {
bond_slave_unregister(bundle->bond, port);
}
bundle_update(bundle);
}
static bool
bundle_add_port(struct ofbundle *bundle, uint32_t ofp_port,
struct lacp_slave_settings *lacp,
uint32_t bond_stable_id)
{
struct ofport_dpif *port;
port = get_ofp_port(bundle->ofproto, ofp_port);
if (!port) {
return false;
}
if (port->bundle != bundle) {
bundle->ofproto->need_revalidate = true;
if (port->bundle) {
bundle_del_port(port);
}
port->bundle = bundle;
list_push_back(&bundle->ports, &port->bundle_node);
if (port->up.opp.config & htonl(OFPPC_NO_FLOOD)
|| !stp_forward_in_state(port->stp_state)) {
bundle->floodable = false;
}
}
if (lacp) {
port->bundle->ofproto->need_revalidate = true;
lacp_slave_register(bundle->lacp, port, lacp);
}
port->bond_stable_id = bond_stable_id;
return true;
}
static void
bundle_destroy(struct ofbundle *bundle)
{
struct ofproto_dpif *ofproto;
struct ofport_dpif *port, *next_port;
int i;
if (!bundle) {
return;
}
ofproto = bundle->ofproto;
for (i = 0; i < MAX_MIRRORS; i++) {
struct ofmirror *m = ofproto->mirrors[i];
if (m) {
if (m->out == bundle) {
mirror_destroy(m);
} else if (hmapx_find_and_delete(&m->srcs, bundle)
|| hmapx_find_and_delete(&m->dsts, bundle)) {
ofproto->need_revalidate = true;
}
}
}
LIST_FOR_EACH_SAFE (port, next_port, bundle_node, &bundle->ports) {
bundle_del_port(port);
}
bundle_flush_macs(bundle);
hmap_remove(&ofproto->bundles, &bundle->hmap_node);
free(bundle->name);
free(bundle->trunks);
lacp_destroy(bundle->lacp);
bond_destroy(bundle->bond);
free(bundle);
}
static int
bundle_set(struct ofproto *ofproto_, void *aux,
const struct ofproto_bundle_settings *s)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
bool need_flush = false;
struct ofport_dpif *port;
struct ofbundle *bundle;
unsigned long *trunks;
int vlan;
size_t i;
bool ok;
if (!s) {
bundle_destroy(bundle_lookup(ofproto, aux));
return 0;
}
assert(s->n_slaves == 1 || s->bond != NULL);
assert((s->lacp != NULL) == (s->lacp_slaves != NULL));
bundle = bundle_lookup(ofproto, aux);
if (!bundle) {
bundle = xmalloc(sizeof *bundle);
bundle->ofproto = ofproto;
hmap_insert(&ofproto->bundles, &bundle->hmap_node,
hash_pointer(aux, 0));
bundle->aux = aux;
bundle->name = NULL;
list_init(&bundle->ports);
bundle->vlan_mode = PORT_VLAN_TRUNK;
bundle->vlan = -1;
bundle->trunks = NULL;
bundle->lacp = NULL;
bundle->bond = NULL;
bundle->floodable = true;
bundle->src_mirrors = 0;
bundle->dst_mirrors = 0;
bundle->mirror_out = 0;
}
if (!bundle->name || strcmp(s->name, bundle->name)) {
free(bundle->name);
bundle->name = xstrdup(s->name);
}
/* LACP. */
if (s->lacp) {
if (!bundle->lacp) {
ofproto->need_revalidate = true;
bundle->lacp = lacp_create();
}
lacp_configure(bundle->lacp, s->lacp);
} else {
lacp_destroy(bundle->lacp);
bundle->lacp = NULL;
}
/* Update set of ports. */
ok = true;
for (i = 0; i < s->n_slaves; i++) {
if (!bundle_add_port(bundle, s->slaves[i],
s->lacp ? &s->lacp_slaves[i] : NULL,
s->bond_stable_ids ? s->bond_stable_ids[i] : 0)) {
ok = false;
}
}
if (!ok || list_size(&bundle->ports) != s->n_slaves) {
struct ofport_dpif *next_port;
LIST_FOR_EACH_SAFE (port, next_port, bundle_node, &bundle->ports) {
for (i = 0; i < s->n_slaves; i++) {
if (s->slaves[i] == port->up.ofp_port) {
goto found;
}
}
bundle_del_port(port);
found: ;
}
}
assert(list_size(&bundle->ports) <= s->n_slaves);
if (list_is_empty(&bundle->ports)) {
bundle_destroy(bundle);
return EINVAL;
}
/* Set VLAN tagging mode */
if (s->vlan_mode != bundle->vlan_mode) {
bundle->vlan_mode = s->vlan_mode;
need_flush = true;
}
/* Set VLAN tag. */
vlan = (s->vlan_mode == PORT_VLAN_TRUNK ? -1
: s->vlan >= 0 && s->vlan <= 4095 ? s->vlan
: 0);
if (vlan != bundle->vlan) {
bundle->vlan = vlan;
need_flush = true;
}
/* Get trunked VLANs. */
switch (s->vlan_mode) {
case PORT_VLAN_ACCESS:
trunks = NULL;
break;
case PORT_VLAN_TRUNK:
trunks = (unsigned long *) s->trunks;
break;
case PORT_VLAN_NATIVE_UNTAGGED:
case PORT_VLAN_NATIVE_TAGGED:
if (vlan != 0 && (!s->trunks
|| !bitmap_is_set(s->trunks, vlan)
|| bitmap_is_set(s->trunks, 0))) {
/* Force trunking the native VLAN and prohibit trunking VLAN 0. */
if (s->trunks) {
trunks = bitmap_clone(s->trunks, 4096);
} else {
trunks = bitmap_allocate1(4096);
}
bitmap_set1(trunks, vlan);
bitmap_set0(trunks, 0);
} else {
trunks = (unsigned long *) s->trunks;
}
break;
default:
NOT_REACHED();
}
if (!vlan_bitmap_equal(trunks, bundle->trunks)) {
free(bundle->trunks);
if (trunks == s->trunks) {
bundle->trunks = vlan_bitmap_clone(trunks);
} else {
bundle->trunks = trunks;
trunks = NULL;
}
need_flush = true;
}
if (trunks != s->trunks) {
free(trunks);
}
/* Bonding. */
if (!list_is_short(&bundle->ports)) {
bundle->ofproto->has_bonded_bundles = true;
if (bundle->bond) {
if (bond_reconfigure(bundle->bond, s->bond)) {
ofproto->need_revalidate = true;
}
} else {
bundle->bond = bond_create(s->bond);
ofproto->need_revalidate = true;
}
LIST_FOR_EACH (port, bundle_node, &bundle->ports) {
bond_slave_register(bundle->bond, port, port->bond_stable_id,
port->up.netdev);
}
} else {
bond_destroy(bundle->bond);
bundle->bond = NULL;
}
/* If we changed something that would affect MAC learning, un-learn
* everything on this port and force flow revalidation. */
if (need_flush) {
bundle_flush_macs(bundle);
}
return 0;
}
static void
bundle_remove(struct ofport *port_)
{
struct ofport_dpif *port = ofport_dpif_cast(port_);
struct ofbundle *bundle = port->bundle;
if (bundle) {
bundle_del_port(port);
if (list_is_empty(&bundle->ports)) {
bundle_destroy(bundle);
} else if (list_is_short(&bundle->ports)) {
bond_destroy(bundle->bond);
bundle->bond = NULL;
}
}
}
static void
send_pdu_cb(void *port_, const void *pdu, size_t pdu_size)
{
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 10);
struct ofport_dpif *port = port_;
uint8_t ea[ETH_ADDR_LEN];
int error;
error = netdev_get_etheraddr(port->up.netdev, ea);
if (!error) {
struct ofpbuf packet;
void *packet_pdu;
ofpbuf_init(&packet, 0);
packet_pdu = eth_compose(&packet, eth_addr_lacp, ea, ETH_TYPE_LACP,
pdu_size);
memcpy(packet_pdu, pdu, pdu_size);
send_packet(ofproto_dpif_cast(port->up.ofproto), port->odp_port,
&packet);
ofpbuf_uninit(&packet);
} else {
VLOG_ERR_RL(&rl, "port %s: cannot obtain Ethernet address of iface "
"%s (%s)", port->bundle->name,
netdev_get_name(port->up.netdev), strerror(error));
}
}
static void
bundle_send_learning_packets(struct ofbundle *bundle)
{
struct ofproto_dpif *ofproto = bundle->ofproto;
int error, n_packets, n_errors;
struct mac_entry *e;
error = n_packets = n_errors = 0;
LIST_FOR_EACH (e, lru_node, &ofproto->ml->lrus) {
if (e->port.p != bundle) {
struct ofpbuf *learning_packet;
struct ofport_dpif *port;
int ret;
learning_packet = bond_compose_learning_packet(bundle->bond, e->mac,
e->vlan,
(void **)&port);
ret = send_packet(ofproto_dpif_cast(port->up.ofproto),
port->odp_port, learning_packet);
ofpbuf_delete(learning_packet);
if (ret) {
error = ret;
n_errors++;
}
n_packets++;
}
}
if (n_errors) {
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
VLOG_WARN_RL(&rl, "bond %s: %d errors sending %d gratuitous learning "
"packets, last error was: %s",
bundle->name, n_errors, n_packets, strerror(error));
} else {
VLOG_DBG("bond %s: sent %d gratuitous learning packets",
bundle->name, n_packets);
}
}
static void
bundle_run(struct ofbundle *bundle)
{
if (bundle->lacp) {
lacp_run(bundle->lacp, send_pdu_cb);
}
if (bundle->bond) {
struct ofport_dpif *port;
LIST_FOR_EACH (port, bundle_node, &bundle->ports) {
bond_slave_set_may_enable(bundle->bond, port, port->may_enable);
}
bond_run(bundle->bond, &bundle->ofproto->revalidate_set,
lacp_negotiated(bundle->lacp));
if (bond_should_send_learning_packets(bundle->bond)) {
bundle_send_learning_packets(bundle);
}
}
}
static void
bundle_wait(struct ofbundle *bundle)
{
if (bundle->lacp) {
lacp_wait(bundle->lacp);
}
if (bundle->bond) {
bond_wait(bundle->bond);
}
}
/* Mirrors. */
static int
mirror_scan(struct ofproto_dpif *ofproto)
{
int idx;
for (idx = 0; idx < MAX_MIRRORS; idx++) {
if (!ofproto->mirrors[idx]) {
return idx;
}
}
return -1;
}
static struct ofmirror *
mirror_lookup(struct ofproto_dpif *ofproto, void *aux)
{
int i;
for (i = 0; i < MAX_MIRRORS; i++) {
struct ofmirror *mirror = ofproto->mirrors[i];
if (mirror && mirror->aux == aux) {
return mirror;
}
}
return NULL;
}
static int
mirror_set(struct ofproto *ofproto_, void *aux,
const struct ofproto_mirror_settings *s)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
mirror_mask_t mirror_bit;
struct ofbundle *bundle;
struct ofmirror *mirror;
struct ofbundle *out;
struct hmapx srcs; /* Contains "struct ofbundle *"s. */
struct hmapx dsts; /* Contains "struct ofbundle *"s. */
int out_vlan;
mirror = mirror_lookup(ofproto, aux);
if (!s) {
mirror_destroy(mirror);
return 0;
}
if (!mirror) {
int idx;
idx = mirror_scan(ofproto);
if (idx < 0) {
VLOG_WARN("bridge %s: maximum of %d port mirrors reached, "
"cannot create %s",
ofproto->up.name, MAX_MIRRORS, s->name);
return EFBIG;
}
mirror = ofproto->mirrors[idx] = xzalloc(sizeof *mirror);
mirror->ofproto = ofproto;
mirror->idx = idx;
mirror->aux = aux;
mirror->out_vlan = -1;
mirror->name = NULL;
}
if (!mirror->name || strcmp(s->name, mirror->name)) {
free(mirror->name);
mirror->name = xstrdup(s->name);
}
/* Get the new configuration. */
if (s->out_bundle) {
out = bundle_lookup(ofproto, s->out_bundle);
if (!out) {
mirror_destroy(mirror);
return EINVAL;
}
out_vlan = -1;
} else {
out = NULL;
out_vlan = s->out_vlan;
}
bundle_lookup_multiple(ofproto, s->srcs, s->n_srcs, &srcs);
bundle_lookup_multiple(ofproto, s->dsts, s->n_dsts, &dsts);
/* If the configuration has not changed, do nothing. */
if (hmapx_equals(&srcs, &mirror->srcs)
&& hmapx_equals(&dsts, &mirror->dsts)
&& vlan_bitmap_equal(mirror->vlans, s->src_vlans)
&& mirror->out == out
&& mirror->out_vlan == out_vlan)
{
hmapx_destroy(&srcs);
hmapx_destroy(&dsts);
return 0;
}
hmapx_swap(&srcs, &mirror->srcs);
hmapx_destroy(&srcs);
hmapx_swap(&dsts, &mirror->dsts);
hmapx_destroy(&dsts);
free(mirror->vlans);
mirror->vlans = vlan_bitmap_clone(s->src_vlans);
mirror->out = out;
mirror->out_vlan = out_vlan;
/* Update bundles. */
mirror_bit = MIRROR_MASK_C(1) << mirror->idx;
HMAP_FOR_EACH (bundle, hmap_node, &mirror->ofproto->bundles) {
if (hmapx_contains(&mirror->srcs, bundle)) {
bundle->src_mirrors |= mirror_bit;
} else {
bundle->src_mirrors &= ~mirror_bit;
}
if (hmapx_contains(&mirror->dsts, bundle)) {
bundle->dst_mirrors |= mirror_bit;
} else {
bundle->dst_mirrors &= ~mirror_bit;
}
if (mirror->out == bundle) {
bundle->mirror_out |= mirror_bit;
} else {
bundle->mirror_out &= ~mirror_bit;
}
}
ofproto->need_revalidate = true;
mac_learning_flush(ofproto->ml);
return 0;
}
static void
mirror_destroy(struct ofmirror *mirror)
{
struct ofproto_dpif *ofproto;
mirror_mask_t mirror_bit;
struct ofbundle *bundle;
if (!mirror) {
return;
}
ofproto = mirror->ofproto;
ofproto->need_revalidate = true;
mac_learning_flush(ofproto->ml);
mirror_bit = MIRROR_MASK_C(1) << mirror->idx;
HMAP_FOR_EACH (bundle, hmap_node, &ofproto->bundles) {
bundle->src_mirrors &= ~mirror_bit;
bundle->dst_mirrors &= ~mirror_bit;
bundle->mirror_out &= ~mirror_bit;
}
hmapx_destroy(&mirror->srcs);
hmapx_destroy(&mirror->dsts);
free(mirror->vlans);
ofproto->mirrors[mirror->idx] = NULL;
free(mirror->name);
free(mirror);
}
static int
set_flood_vlans(struct ofproto *ofproto_, unsigned long *flood_vlans)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
if (mac_learning_set_flood_vlans(ofproto->ml, flood_vlans)) {
ofproto->need_revalidate = true;
mac_learning_flush(ofproto->ml);
}
return 0;
}
static bool
is_mirror_output_bundle(const struct ofproto *ofproto_, void *aux)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
struct ofbundle *bundle = bundle_lookup(ofproto, aux);
return bundle && bundle->mirror_out != 0;
}
static void
forward_bpdu_changed(struct ofproto *ofproto_)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
/* Revalidate cached flows whenever forward_bpdu option changes. */
ofproto->need_revalidate = true;
}
/* Ports. */
static struct ofport_dpif *
get_ofp_port(struct ofproto_dpif *ofproto, uint16_t ofp_port)
{
struct ofport *ofport = ofproto_get_port(&ofproto->up, ofp_port);
return ofport ? ofport_dpif_cast(ofport) : NULL;
}
static struct ofport_dpif *
get_odp_port(struct ofproto_dpif *ofproto, uint32_t odp_port)
{
return get_ofp_port(ofproto, odp_port_to_ofp_port(odp_port));
}
static void
ofproto_port_from_dpif_port(struct ofproto_port *ofproto_port,
struct dpif_port *dpif_port)
{
ofproto_port->name = dpif_port->name;
ofproto_port->type = dpif_port->type;
ofproto_port->ofp_port = odp_port_to_ofp_port(dpif_port->port_no);
}
static void
port_run(struct ofport_dpif *ofport)
{
bool enable = netdev_get_carrier(ofport->up.netdev);
if (ofport->cfm) {
cfm_run(ofport->cfm);
if (cfm_should_send_ccm(ofport->cfm)) {
struct ofpbuf packet;
ofpbuf_init(&packet, 0);
cfm_compose_ccm(ofport->cfm, &packet, ofport->up.opp.hw_addr);
send_packet(ofproto_dpif_cast(ofport->up.ofproto),
ofport->odp_port, &packet);
ofpbuf_uninit(&packet);
}
enable = enable && !cfm_get_fault(ofport->cfm)
&& cfm_get_opup(ofport->cfm);
}
if (ofport->bundle) {
enable = enable && lacp_slave_may_enable(ofport->bundle->lacp, ofport);
}
if (ofport->may_enable != enable) {
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport->up.ofproto);
if (ofproto->has_bundle_action) {
ofproto->need_revalidate = true;
}
}
ofport->may_enable = enable;
}
static void
port_wait(struct ofport_dpif *ofport)
{
if (ofport->cfm) {
cfm_wait(ofport->cfm);
}
}
static int
port_query_by_name(const struct ofproto *ofproto_, const char *devname,
struct ofproto_port *ofproto_port)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
struct dpif_port dpif_port;
int error;
error = dpif_port_query_by_name(ofproto->dpif, devname, &dpif_port);
if (!error) {
ofproto_port_from_dpif_port(ofproto_port, &dpif_port);
}
return error;
}
static int
port_add(struct ofproto *ofproto_, struct netdev *netdev, uint16_t *ofp_portp)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
uint16_t odp_port;
int error;
error = dpif_port_add(ofproto->dpif, netdev, &odp_port);
if (!error) {
*ofp_portp = odp_port_to_ofp_port(odp_port);
}
return error;
}
static int
port_del(struct ofproto *ofproto_, uint16_t ofp_port)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
int error;
error = dpif_port_del(ofproto->dpif, ofp_port_to_odp_port(ofp_port));
if (!error) {
struct ofport_dpif *ofport = get_ofp_port(ofproto, ofp_port);
if (ofport) {
/* The caller is going to close ofport->up.netdev. If this is a
* bonded port, then the bond is using that netdev, so remove it
* from the bond. The client will need to reconfigure everything
* after deleting ports, so then the slave will get re-added. */
bundle_remove(&ofport->up);
}
}
return error;
}
struct port_dump_state {
struct dpif_port_dump dump;
bool done;
};
static int
port_dump_start(const struct ofproto *ofproto_, void **statep)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
struct port_dump_state *state;
*statep = state = xmalloc(sizeof *state);
dpif_port_dump_start(&state->dump, ofproto->dpif);
state->done = false;
return 0;
}
static int
port_dump_next(const struct ofproto *ofproto_ OVS_UNUSED, void *state_,
struct ofproto_port *port)
{
struct port_dump_state *state = state_;
struct dpif_port dpif_port;
if (dpif_port_dump_next(&state->dump, &dpif_port)) {
ofproto_port_from_dpif_port(port, &dpif_port);
return 0;
} else {
int error = dpif_port_dump_done(&state->dump);
state->done = true;
return error ? error : EOF;
}
}
static int
port_dump_done(const struct ofproto *ofproto_ OVS_UNUSED, void *state_)
{
struct port_dump_state *state = state_;
if (!state->done) {
dpif_port_dump_done(&state->dump);
}
free(state);
return 0;
}
static int
port_poll(const struct ofproto *ofproto_, char **devnamep)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
return dpif_port_poll(ofproto->dpif, devnamep);
}
static void
port_poll_wait(const struct ofproto *ofproto_)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
dpif_port_poll_wait(ofproto->dpif);
}
static int
port_is_lacp_current(const struct ofport *ofport_)
{
const struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
return (ofport->bundle && ofport->bundle->lacp
? lacp_slave_is_current(ofport->bundle->lacp, ofport)
: -1);
}
/* Upcall handling. */
/* Flow miss batching.
*
* Some dpifs implement operations faster when you hand them off in a batch.
* To allow batching, "struct flow_miss" queues the dpif-related work needed
* for a given flow. Each "struct flow_miss" corresponds to sending one or
* more packets, plus possibly installing the flow in the dpif.
*
* So far we only batch the operations that affect flow setup time the most.
* It's possible to batch more than that, but the benefit might be minimal. */
struct flow_miss {
struct hmap_node hmap_node;
struct flow flow;
const struct nlattr *key;
size_t key_len;
struct list packets;
};
struct flow_miss_op {
union dpif_op dpif_op;
struct facet *facet;
};
/* Sends an OFPT_PACKET_IN message for 'packet' of type OFPR_NO_MATCH to each
* OpenFlow controller as necessary according to their individual
* configurations.
*
* If 'clone' is true, the caller retains ownership of 'packet'. Otherwise,
* ownership is transferred to this function. */
static void
send_packet_in_miss(struct ofproto_dpif *ofproto, struct ofpbuf *packet,
const struct flow *flow, bool clone)
{
struct ofputil_packet_in pin;
pin.packet = packet;
pin.in_port = flow->in_port;
pin.reason = OFPR_NO_MATCH;
pin.buffer_id = 0; /* not yet known */
pin.send_len = 0; /* not used for flow table misses */
connmgr_send_packet_in(ofproto->up.connmgr, &pin, flow,
clone ? NULL : packet);
}
/* Sends an OFPT_PACKET_IN message for 'packet' of type OFPR_ACTION to each
* OpenFlow controller as necessary according to their individual
* configurations.
*
* 'send_len' should be the number of bytes of 'packet' to send to the
* controller, as specified in the action that caused the packet to be sent.
*
* If 'clone' is true, the caller retains ownership of 'upcall->packet'.
* Otherwise, ownership is transferred to this function. */
static void
send_packet_in_action(struct ofproto_dpif *ofproto, struct ofpbuf *packet,
uint64_t userdata, const struct flow *flow, bool clone)
{
struct ofputil_packet_in pin;
struct user_action_cookie cookie;
memcpy(&cookie, &userdata, sizeof(cookie));
pin.packet = packet;
pin.in_port = flow->in_port;
pin.reason = OFPR_ACTION;
pin.buffer_id = 0; /* not yet known */
pin.send_len = cookie.data;
connmgr_send_packet_in(ofproto->up.connmgr, &pin, flow,
clone ? NULL : packet);
}
static bool
process_special(struct ofproto_dpif *ofproto, const struct flow *flow,
const struct ofpbuf *packet)
{
struct ofport_dpif *ofport = get_ofp_port(ofproto, flow->in_port);
if (!ofport) {
return false;
}
if (ofport->cfm && cfm_should_process_flow(ofport->cfm, flow)) {
if (packet) {
cfm_process_heartbeat(ofport->cfm, packet);
}
return true;
} else if (ofport->bundle && ofport->bundle->lacp
&& flow->dl_type == htons(ETH_TYPE_LACP)) {
if (packet) {
lacp_process_packet(ofport->bundle->lacp, ofport, packet);
}
return true;
} else if (ofproto->stp && stp_should_process_flow(flow)) {
if (packet) {
stp_process_packet(ofport, packet);
}
return true;
}
return false;
}
static struct flow_miss *
flow_miss_create(struct hmap *todo, const struct flow *flow,
const struct nlattr *key, size_t key_len)
{
uint32_t hash = flow_hash(flow, 0);
struct flow_miss *miss;
HMAP_FOR_EACH_WITH_HASH (miss, hmap_node, hash, todo) {
if (flow_equal(&miss->flow, flow)) {
return miss;
}
}
miss = xmalloc(sizeof *miss);
hmap_insert(todo, &miss->hmap_node, hash);
miss->flow = *flow;
miss->key = key;
miss->key_len = key_len;
list_init(&miss->packets);
return miss;
}
static void
handle_flow_miss(struct ofproto_dpif *ofproto, struct flow_miss *miss,
struct flow_miss_op *ops, size_t *n_ops)
{
const struct flow *flow = &miss->flow;
struct ofpbuf *packet, *next_packet;
struct facet *facet;
facet = facet_lookup_valid(ofproto, flow);
if (!facet) {
struct rule_dpif *rule;
rule = rule_dpif_lookup(ofproto, flow, 0);
if (!rule) {
/* Don't send a packet-in if OFPPC_NO_PACKET_IN asserted. */
struct ofport_dpif *port = get_ofp_port(ofproto, flow->in_port);
if (port) {
if (port->up.opp.config & htonl(OFPPC_NO_PACKET_IN)) {
COVERAGE_INC(ofproto_dpif_no_packet_in);
/* XXX install 'drop' flow entry */
return;
}
} else {
VLOG_WARN_RL(&rl, "packet-in on unknown port %"PRIu16,
flow->in_port);
}
LIST_FOR_EACH_SAFE (packet, next_packet, list_node,
&miss->packets) {
list_remove(&packet->list_node);
send_packet_in_miss(ofproto, packet, flow, false);
}
return;
}
facet = facet_create(rule, flow);
}
LIST_FOR_EACH_SAFE (packet, next_packet, list_node, &miss->packets) {
list_remove(&packet->list_node);
ofproto->n_matches++;
if (facet->rule->up.cr.priority == FAIL_OPEN_PRIORITY) {
/*
* Extra-special case for fail-open mode.
*
* We are in fail-open mode and the packet matched the fail-open
* rule, but we are connected to a controller too. We should send
* the packet up to the controller in the hope that it will try to
* set up a flow and thereby allow us to exit fail-open.
*
* See the top-level comment in fail-open.c for more information.
*/
send_packet_in_miss(ofproto, packet, flow, true);
}
if (!facet->may_install) {
facet_make_actions(ofproto, facet, packet);
}
if (!execute_controller_action(ofproto, &facet->flow,
facet->actions, facet->actions_len,
packet)) {
struct flow_miss_op *op = &ops[(*n_ops)++];
struct dpif_execute *execute = &op->dpif_op.execute;
op->facet = facet;
execute->type = DPIF_OP_EXECUTE;
execute->key = miss->key;
execute->key_len = miss->key_len;
execute->actions
= (facet->may_install
? facet->actions
: xmemdup(facet->actions, facet->actions_len));
execute->actions_len = facet->actions_len;
execute->packet = packet;
}
}
if (facet->may_install) {
struct flow_miss_op *op = &ops[(*n_ops)++];
struct dpif_flow_put *put = &op->dpif_op.flow_put;
op->facet = facet;
put->type = DPIF_OP_FLOW_PUT;
put->flags = DPIF_FP_CREATE | DPIF_FP_MODIFY;
put->key = miss->key;
put->key_len = miss->key_len;
put->actions = facet->actions;
put->actions_len = facet->actions_len;
put->stats = NULL;
}
}
static void
handle_miss_upcalls(struct ofproto_dpif *ofproto, struct dpif_upcall *upcalls,
size_t n_upcalls)
{
struct dpif_upcall *upcall;
struct flow_miss *miss, *next_miss;
struct flow_miss_op flow_miss_ops[FLOW_MISS_MAX_BATCH * 2];
union dpif_op *dpif_ops[FLOW_MISS_MAX_BATCH * 2];
struct hmap todo;
size_t n_ops;
size_t i;
if (!n_upcalls) {
return;
}
/* Construct the to-do list.
*
* This just amounts to extracting the flow from each packet and sticking
* the packets that have the same flow in the same "flow_miss" structure so
* that we can process them together. */
hmap_init(&todo);
for (upcall = upcalls; upcall < &upcalls[n_upcalls]; upcall++) {
struct flow_miss *miss;
struct flow flow;
/* Obtain in_port and tun_id, at least, then set 'flow''s header
* pointers. */
odp_flow_key_to_flow(upcall->key, upcall->key_len, &flow);
flow_extract(upcall->packet, flow.priority, flow.tun_id,
flow.in_port, &flow);
/* Handle 802.1ag, LACP, and STP specially. */
if (process_special(ofproto, &flow, upcall->packet)) {
ofpbuf_delete(upcall->packet);
ofproto->n_matches++;
continue;
}
/* Add other packets to a to-do list. */
miss = flow_miss_create(&todo, &flow, upcall->key, upcall->key_len);
list_push_back(&miss->packets, &upcall->packet->list_node);
}
/* Process each element in the to-do list, constructing the set of
* operations to batch. */
n_ops = 0;
HMAP_FOR_EACH_SAFE (miss, next_miss, hmap_node, &todo) {
handle_flow_miss(ofproto, miss, flow_miss_ops, &n_ops);
ofpbuf_list_delete(&miss->packets);
hmap_remove(&todo, &miss->hmap_node);
free(miss);
}
assert(n_ops <= ARRAY_SIZE(flow_miss_ops));
hmap_destroy(&todo);
/* Execute batch. */
for (i = 0; i < n_ops; i++) {
dpif_ops[i] = &flow_miss_ops[i].dpif_op;
}
dpif_operate(ofproto->dpif, dpif_ops, n_ops);
/* Free memory and update facets. */
for (i = 0; i < n_ops; i++) {
struct flow_miss_op *op = &flow_miss_ops[i];
struct dpif_execute *execute;
struct dpif_flow_put *put;
switch (op->dpif_op.type) {
case DPIF_OP_EXECUTE:
execute = &op->dpif_op.execute;
if (op->facet->actions != execute->actions) {
free((struct nlattr *) execute->actions);
}
ofpbuf_delete((struct ofpbuf *) execute->packet);
break;
case DPIF_OP_FLOW_PUT:
put = &op->dpif_op.flow_put;
if (!put->error) {
op->facet->installed = true;
}
break;
}
}
}
static void
handle_userspace_upcall(struct ofproto_dpif *ofproto,
struct dpif_upcall *upcall)
{
struct flow flow;
struct user_action_cookie cookie;
memcpy(&cookie, &upcall->userdata, sizeof(cookie));
if (cookie.type == USER_ACTION_COOKIE_SFLOW) {
if (ofproto->sflow) {
odp_flow_key_to_flow(upcall->key, upcall->key_len, &flow);
dpif_sflow_received(ofproto->sflow, upcall->packet, &flow, &cookie);
}
ofpbuf_delete(upcall->packet);
} else if (cookie.type == USER_ACTION_COOKIE_CONTROLLER) {
COVERAGE_INC(ofproto_dpif_ctlr_action);
odp_flow_key_to_flow(upcall->key, upcall->key_len, &flow);
send_packet_in_action(ofproto, upcall->packet, upcall->userdata,
&flow, false);
} else {
VLOG_WARN_RL(&rl, "invalid user cookie : 0x%"PRIx64, upcall->userdata);
}
}
static void
handle_upcall(struct ofproto_dpif *ofproto, struct dpif_upcall *upcall)
{
switch (upcall->type) {
case DPIF_UC_ACTION:
handle_userspace_upcall(ofproto, upcall);
break;
case DPIF_UC_MISS:
/* The caller handles these. */
NOT_REACHED();
case DPIF_N_UC_TYPES:
default:
VLOG_WARN_RL(&rl, "upcall has unexpected type %"PRIu32, upcall->type);
break;
}
}
/* Flow expiration. */
static int facet_max_idle(const struct ofproto_dpif *);
static void update_stats(struct ofproto_dpif *);
static void rule_expire(struct rule_dpif *);
static void expire_facets(struct ofproto_dpif *, int dp_max_idle);
/* This function is called periodically by run(). Its job is to collect
* updates for the flows that have been installed into the datapath, most
* importantly when they last were used, and then use that information to
* expire flows that have not been used recently.
*
* Returns the number of milliseconds after which it should be called again. */
static int
expire(struct ofproto_dpif *ofproto)
{
struct rule_dpif *rule, *next_rule;
struct classifier *table;
int dp_max_idle;
/* Update stats for each flow in the datapath. */
update_stats(ofproto);
/* Expire facets that have been idle too long. */
dp_max_idle = facet_max_idle(ofproto);
expire_facets(ofproto, dp_max_idle);
/* Expire OpenFlow flows whose idle_timeout or hard_timeout has passed. */
OFPROTO_FOR_EACH_TABLE (table, &ofproto->up) {
struct cls_cursor cursor;
cls_cursor_init(&cursor, table, NULL);
CLS_CURSOR_FOR_EACH_SAFE (rule, next_rule, up.cr, &cursor) {
rule_expire(rule);
}
}
/* All outstanding data in existing flows has been accounted, so it's a
* good time to do bond rebalancing. */
if (ofproto->has_bonded_bundles) {
struct ofbundle *bundle;
HMAP_FOR_EACH (bundle, hmap_node, &ofproto->bundles) {
if (bundle->bond) {
bond_rebalance(bundle->bond, &ofproto->revalidate_set);
}
}
}
return MIN(dp_max_idle, 1000);
}
/* Update 'packet_count', 'byte_count', and 'used' members of installed facets.
*
* This function also pushes statistics updates to rules which each facet
* resubmits into. Generally these statistics will be accurate. However, if a
* facet changes the rule it resubmits into at some time in between
* update_stats() runs, it is possible that statistics accrued to the
* old rule will be incorrectly attributed to the new rule. This could be
* avoided by calling update_stats() whenever rules are created or
* deleted. However, the performance impact of making so many calls to the
* datapath do not justify the benefit of having perfectly accurate statistics.
*/
static void
update_stats(struct ofproto_dpif *p)
{
const struct dpif_flow_stats *stats;
struct dpif_flow_dump dump;
const struct nlattr *key;
size_t key_len;
dpif_flow_dump_start(&dump, p->dpif);
while (dpif_flow_dump_next(&dump, &key, &key_len, NULL, NULL, &stats)) {
struct facet *facet;
struct flow flow;
if (odp_flow_key_to_flow(key, key_len, &flow)) {
struct ds s;
ds_init(&s);
odp_flow_key_format(key, key_len, &s);
VLOG_WARN_RL(&rl, "failed to convert datapath flow key to flow: %s",
ds_cstr(&s));
ds_destroy(&s);
continue;
}
facet = facet_find(p, &flow);
if (facet && facet->installed) {
if (stats->n_packets >= facet->dp_packet_count) {
uint64_t extra = stats->n_packets - facet->dp_packet_count;
facet->packet_count += extra;
} else {
VLOG_WARN_RL(&rl, "unexpected packet count from the datapath");
}
if (stats->n_bytes >= facet->dp_byte_count) {
facet->byte_count += stats->n_bytes - facet->dp_byte_count;
} else {
VLOG_WARN_RL(&rl, "unexpected byte count from datapath");
}
facet->dp_packet_count = stats->n_packets;
facet->dp_byte_count = stats->n_bytes;
facet_update_time(p, facet, stats->used);
facet_account(p, facet);
facet_push_stats(facet);
} else {
/* There's a flow in the datapath that we know nothing about.
* Delete it. */
COVERAGE_INC(facet_unexpected);
dpif_flow_del(p->dpif, key, key_len, NULL);
}
}
dpif_flow_dump_done(&dump);
}
/* Calculates and returns the number of milliseconds of idle time after which
* facets should expire from the datapath and we should fold their statistics
* into their parent rules in userspace. */
static int
facet_max_idle(const struct ofproto_dpif *ofproto)
{
/*
* Idle time histogram.
*
* Most of the time a switch has a relatively small number of facets. When
* this is the case we might as well keep statistics for all of them in
* userspace and to cache them in the kernel datapath for performance as
* well.
*
* As the number of facets increases, the memory required to maintain
* statistics about them in userspace and in the kernel becomes
* significant. However, with a large number of facets it is likely that
* only a few of them are "heavy hitters" that consume a large amount of
* bandwidth. At this point, only heavy hitters are worth caching in the
* kernel and maintaining in userspaces; other facets we can discard.
*
* The technique used to compute the idle time is to build a histogram with
* N_BUCKETS buckets whose width is BUCKET_WIDTH msecs each. Each facet
* that is installed in the kernel gets dropped in the appropriate bucket.
* After the histogram has been built, we compute the cutoff so that only
* the most-recently-used 1% of facets (but at least
* ofproto->up.flow_eviction_threshold flows) are kept cached. At least
* the most-recently-used bucket of facets is kept, so actually an
* arbitrary number of facets can be kept in any given expiration run
* (though the next run will delete most of those unless they receive
* additional data).
*
* This requires a second pass through the facets, in addition to the pass
* made by update_stats(), because the former function never looks
* at uninstallable facets.
*/
enum { BUCKET_WIDTH = ROUND_UP(100, TIME_UPDATE_INTERVAL) };
enum { N_BUCKETS = 5000 / BUCKET_WIDTH };
int buckets[N_BUCKETS] = { 0 };
int total, subtotal, bucket;
struct facet *facet;
long long int now;
int i;
total = hmap_count(&ofproto->facets);
if (total <= ofproto->up.flow_eviction_threshold) {
return N_BUCKETS * BUCKET_WIDTH;
}
/* Build histogram. */
now = time_msec();
HMAP_FOR_EACH (facet, hmap_node, &ofproto->facets) {
long long int idle = now - facet->used;
int bucket = (idle <= 0 ? 0
: idle >= BUCKET_WIDTH * N_BUCKETS ? N_BUCKETS - 1
: (unsigned int) idle / BUCKET_WIDTH);
buckets[bucket]++;
}
/* Find the first bucket whose flows should be expired. */
subtotal = bucket = 0;
do {
subtotal += buckets[bucket++];
} while (bucket < N_BUCKETS &&
subtotal < MAX(ofproto->up.flow_eviction_threshold, total / 100));
if (VLOG_IS_DBG_ENABLED()) {
struct ds s;
ds_init(&s);
ds_put_cstr(&s, "keep");
for (i = 0; i < N_BUCKETS; i++) {
if (i == bucket) {
ds_put_cstr(&s, ", drop");
}
if (buckets[i]) {
ds_put_format(&s, " %d:%d", i * BUCKET_WIDTH, buckets[i]);
}
}
VLOG_INFO("%s: %s (msec:count)", ofproto->up.name, ds_cstr(&s));
ds_destroy(&s);
}
return bucket * BUCKET_WIDTH;
}
static void
facet_active_timeout(struct ofproto_dpif *ofproto, struct facet *facet)
{
if (ofproto->netflow && !facet_is_controller_flow(facet) &&
netflow_active_timeout_expired(ofproto->netflow, &facet->nf_flow)) {
struct ofexpired expired;
if (facet->installed) {
struct dpif_flow_stats stats;
facet_put__(ofproto, facet, facet->actions, facet->actions_len,
&stats);
facet_update_stats(ofproto, facet, &stats);
}
expired.flow = facet->flow;
expired.packet_count = facet->packet_count;
expired.byte_count = facet->byte_count;
expired.used = facet->used;
netflow_expire(ofproto->netflow, &facet->nf_flow, &expired);
}
}
static void
expire_facets(struct ofproto_dpif *ofproto, int dp_max_idle)
{
long long int cutoff = time_msec() - dp_max_idle;
struct facet *facet, *next_facet;
HMAP_FOR_EACH_SAFE (facet, next_facet, hmap_node, &ofproto->facets) {
facet_active_timeout(ofproto, facet);
if (facet->used < cutoff) {
facet_remove(ofproto, facet);
}
}
}
/* If 'rule' is an OpenFlow rule, that has expired according to OpenFlow rules,
* then delete it entirely. */
static void
rule_expire(struct rule_dpif *rule)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(rule->up.ofproto);
struct facet *facet, *next_facet;
long long int now;
uint8_t reason;
/* Has 'rule' expired? */
now = time_msec();
if (rule->up.hard_timeout
&& now > rule->up.modified + rule->up.hard_timeout * 1000) {
reason = OFPRR_HARD_TIMEOUT;
} else if (rule->up.idle_timeout && list_is_empty(&rule->facets)
&& now > rule->used + rule->up.idle_timeout * 1000) {
reason = OFPRR_IDLE_TIMEOUT;
} else {
return;
}
COVERAGE_INC(ofproto_dpif_expired);
/* Update stats. (This is a no-op if the rule expired due to an idle
* timeout, because that only happens when the rule has no facets left.) */
LIST_FOR_EACH_SAFE (facet, next_facet, list_node, &rule->facets) {
facet_remove(ofproto, facet);
}
/* Get rid of the rule. */
ofproto_rule_expire(&rule->up, reason);
}
/* Facets. */
/* Creates and returns a new facet owned by 'rule', given a 'flow'.
*
* The caller must already have determined that no facet with an identical
* 'flow' exists in 'ofproto' and that 'flow' is the best match for 'rule' in
* the ofproto's classifier table.
*
* The facet will initially have no ODP actions. The caller should fix that
* by calling facet_make_actions(). */
static struct facet *
facet_create(struct rule_dpif *rule, const struct flow *flow)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(rule->up.ofproto);
struct facet *facet;
facet = xzalloc(sizeof *facet);
facet->used = time_msec();
hmap_insert(&ofproto->facets, &facet->hmap_node, flow_hash(flow, 0));
list_push_back(&rule->facets, &facet->list_node);
facet->rule = rule;
facet->flow = *flow;
netflow_flow_init(&facet->nf_flow);
netflow_flow_update_time(ofproto->netflow, &facet->nf_flow, facet->used);
return facet;
}
static void
facet_free(struct facet *facet)
{
free(facet->actions);
free(facet);
}
static bool
execute_controller_action(struct ofproto_dpif *ofproto,
const struct flow *flow,
const struct nlattr *odp_actions, size_t actions_len,
struct ofpbuf *packet)
{
if (actions_len
&& odp_actions->nla_type == OVS_ACTION_ATTR_USERSPACE
&& NLA_ALIGN(odp_actions->nla_len) == actions_len) {
/* As an optimization, avoid a round-trip from userspace to kernel to
* userspace. This also avoids possibly filling up kernel packet
* buffers along the way.
*
* This optimization will not accidentally catch sFlow
* OVS_ACTION_ATTR_USERSPACE actions, since those are encapsulated
* inside OVS_ACTION_ATTR_SAMPLE. */
const struct nlattr *nla;
nla = nl_attr_find_nested(odp_actions, OVS_USERSPACE_ATTR_USERDATA);
send_packet_in_action(ofproto, packet, nl_attr_get_u64(nla), flow,
false);
return true;
} else {
return false;
}
}
/* Executes, within 'ofproto', the 'n_actions' actions in 'actions' on
* 'packet', which arrived on 'in_port'.
*
* Takes ownership of 'packet'. */
static bool
execute_odp_actions(struct ofproto_dpif *ofproto, const struct flow *flow,
const struct nlattr *odp_actions, size_t actions_len,
struct ofpbuf *packet)
{
struct odputil_keybuf keybuf;
struct ofpbuf key;
int error;
if (execute_controller_action(ofproto, flow, odp_actions, actions_len,
packet)) {
return true;
}
ofpbuf_use_stack(&key, &keybuf, sizeof keybuf);
odp_flow_key_from_flow(&key, flow);
error = dpif_execute(ofproto->dpif, key.data, key.size,
odp_actions, actions_len, packet);
ofpbuf_delete(packet);
return !error;
}
/* Executes the actions indicated by 'facet' on 'packet' and credits 'facet''s
* statistics appropriately. 'packet' must have at least sizeof(struct
* ofp_packet_in) bytes of headroom.
*
* For correct results, 'packet' must actually be in 'facet''s flow; that is,
* applying flow_extract() to 'packet' would yield the same flow as
* 'facet->flow'.
*
* 'facet' must have accurately composed datapath actions; that is, it must
* not be in need of revalidation.
*
* Takes ownership of 'packet'. */
static void
facet_execute(struct ofproto_dpif *ofproto, struct facet *facet,
struct ofpbuf *packet)
{
struct dpif_flow_stats stats;
assert(ofpbuf_headroom(packet) >= sizeof(struct ofp_packet_in));
dpif_flow_stats_extract(&facet->flow, packet, &stats);
stats.used = time_msec();
if (execute_odp_actions(ofproto, &facet->flow,
facet->actions, facet->actions_len, packet)) {
facet_update_stats(ofproto, facet, &stats);
}
}
/* Remove 'facet' from 'ofproto' and free up the associated memory:
*
* - If 'facet' was installed in the datapath, uninstalls it and updates its
* rule's statistics, via facet_uninstall().
*
* - Removes 'facet' from its rule and from ofproto->facets.
*/
static void
facet_remove(struct ofproto_dpif *ofproto, struct facet *facet)
{
facet_uninstall(ofproto, facet);
facet_flush_stats(ofproto, facet);
hmap_remove(&ofproto->facets, &facet->hmap_node);
list_remove(&facet->list_node);
facet_free(facet);
}
/* Composes the datapath actions for 'facet' based on its rule's actions. */
static void
facet_make_actions(struct ofproto_dpif *p, struct facet *facet,
const struct ofpbuf *packet)
{
const struct rule_dpif *rule = facet->rule;
struct ofpbuf *odp_actions;
struct action_xlate_ctx ctx;
action_xlate_ctx_init(&ctx, p, &facet->flow, packet);
odp_actions = xlate_actions(&ctx, rule->up.actions, rule->up.n_actions);
facet->tags = ctx.tags;
facet->may_install = ctx.may_set_up_flow;
facet->has_learn = ctx.has_learn;
facet->has_normal = ctx.has_normal;
facet->nf_flow.output_iface = ctx.nf_output_iface;
if (facet->actions_len != odp_actions->size
|| memcmp(facet->actions, odp_actions->data, odp_actions->size)) {
free(facet->actions);
facet->actions_len = odp_actions->size;
facet->actions = xmemdup(odp_actions->data, odp_actions->size);
}
ofpbuf_delete(odp_actions);
}
/* Updates 'facet''s flow in the datapath setting its actions to 'actions_len'
* bytes of actions in 'actions'. If 'stats' is non-null, statistics counters
* in the datapath will be zeroed and 'stats' will be updated with traffic new
* since 'facet' was last updated.
*
* Returns 0 if successful, otherwise a positive errno value.*/
static int
facet_put__(struct ofproto_dpif *ofproto, struct facet *facet,
const struct nlattr *actions, size_t actions_len,
struct dpif_flow_stats *stats)
{
struct odputil_keybuf keybuf;
enum dpif_flow_put_flags flags;
struct ofpbuf key;
int ret;
flags = DPIF_FP_CREATE | DPIF_FP_MODIFY;
if (stats) {
flags |= DPIF_FP_ZERO_STATS;
}
ofpbuf_use_stack(&key, &keybuf, sizeof keybuf);
odp_flow_key_from_flow(&key, &facet->flow);
ret = dpif_flow_put(ofproto->dpif, flags, key.data, key.size,
actions, actions_len, stats);
if (stats) {
facet_reset_dp_stats(facet, stats);
}
return ret;
}
/* If 'facet' is installable, inserts or re-inserts it into 'p''s datapath. If
* 'zero_stats' is true, clears any existing statistics from the datapath for
* 'facet'. */
static void
facet_install(struct ofproto_dpif *p, struct facet *facet, bool zero_stats)
{
struct dpif_flow_stats stats;
if (facet->may_install
&& !facet_put__(p, facet, facet->actions, facet->actions_len,
zero_stats ? &stats : NULL)) {
facet->installed = true;
}
}
static void
facet_account(struct ofproto_dpif *ofproto, struct facet *facet)
{
uint64_t n_bytes;
const struct nlattr *a;
unsigned int left;
ovs_be16 vlan_tci;
if (facet->byte_count <= facet->accounted_bytes) {
return;
}
n_bytes = facet->byte_count - facet->accounted_bytes;
facet->accounted_bytes = facet->byte_count;
/* Feed information from the active flows back into the learning table to
* ensure that table is always in sync with what is actually flowing
* through the datapath. */
if (facet->has_learn || facet->has_normal) {
struct action_xlate_ctx ctx;
action_xlate_ctx_init(&ctx, ofproto, &facet->flow, NULL);
ctx.may_learn = true;
ofpbuf_delete(xlate_actions(&ctx, facet->rule->up.actions,
facet->rule->up.n_actions));
}
if (!facet->has_normal || !ofproto->has_bonded_bundles) {
return;
}
/* This loop feeds byte counters to bond_account() for rebalancing to use
* as a basis. We also need to track the actual VLAN on which the packet
* is going to be sent to ensure that it matches the one passed to
* bond_choose_output_slave(). (Otherwise, we will account to the wrong
* hash bucket.) */
vlan_tci = facet->flow.vlan_tci;
NL_ATTR_FOR_EACH_UNSAFE (a, left, facet->actions, facet->actions_len) {
struct ofport_dpif *port;
switch (nl_attr_type(a)) {
const struct nlattr *nested;
case OVS_ACTION_ATTR_OUTPUT:
port = get_odp_port(ofproto, nl_attr_get_u32(a));
if (port && port->bundle && port->bundle->bond) {
bond_account(port->bundle->bond, &facet->flow,
vlan_tci_to_vid(vlan_tci), n_bytes);
}
break;
case OVS_ACTION_ATTR_POP:
if (nl_attr_get_u16(a) == OVS_KEY_ATTR_8021Q) {
vlan_tci = htons(0);
}
break;
case OVS_ACTION_ATTR_PUSH:
nested = nl_attr_get(a);
if (nl_attr_type(nested) == OVS_KEY_ATTR_8021Q) {
const struct ovs_key_8021q *q_key;
q_key = nl_attr_get_unspec(nested, sizeof(*q_key));
vlan_tci = q_key->q_tci;
}
break;
}
}
}
/* If 'rule' is installed in the datapath, uninstalls it. */
static void
facet_uninstall(struct ofproto_dpif *p, struct facet *facet)
{
if (facet->installed) {
struct odputil_keybuf keybuf;
struct dpif_flow_stats stats;
struct ofpbuf key;
int error;
ofpbuf_use_stack(&key, &keybuf, sizeof keybuf);
odp_flow_key_from_flow(&key, &facet->flow);
error = dpif_flow_del(p->dpif, key.data, key.size, &stats);
facet_reset_dp_stats(facet, &stats);
if (!error) {
facet_update_stats(p, facet, &stats);
}
facet->installed = false;
} else {
assert(facet->dp_packet_count == 0);
assert(facet->dp_byte_count == 0);
}
}
/* Returns true if the only action for 'facet' is to send to the controller.
* (We don't report NetFlow expiration messages for such facets because they
* are just part of the control logic for the network, not real traffic). */
static bool
facet_is_controller_flow(struct facet *facet)
{
return (facet
&& facet->rule->up.n_actions == 1
&& action_outputs_to_port(&facet->rule->up.actions[0],
htons(OFPP_CONTROLLER)));
}
/* Resets 'facet''s datapath statistics counters. This should be called when
* 'facet''s statistics are cleared in the datapath. If 'stats' is non-null,
* it should contain the statistics returned by dpif when 'facet' was reset in
* the datapath. 'stats' will be modified to only included statistics new
* since 'facet' was last updated. */
static void
facet_reset_dp_stats(struct facet *facet, struct dpif_flow_stats *stats)
{
if (stats && facet->dp_packet_count <= stats->n_packets
&& facet->dp_byte_count <= stats->n_bytes) {
stats->n_packets -= facet->dp_packet_count;
stats->n_bytes -= facet->dp_byte_count;
}
facet->dp_packet_count = 0;
facet->dp_byte_count = 0;
}
/* Folds all of 'facet''s statistics into its rule. Also updates the
* accounting ofhook and emits a NetFlow expiration if appropriate. All of
* 'facet''s statistics in the datapath should have been zeroed and folded into
* its packet and byte counts before this function is called. */
static void
facet_flush_stats(struct ofproto_dpif *ofproto, struct facet *facet)
{
assert(!facet->dp_byte_count);
assert(!facet->dp_packet_count);
facet_push_stats(facet);
facet_account(ofproto, facet);
if (ofproto->netflow && !facet_is_controller_flow(facet)) {
struct ofexpired expired;
expired.flow = facet->flow;
expired.packet_count = facet->packet_count;
expired.byte_count = facet->byte_count;
expired.used = facet->used;
netflow_expire(ofproto->netflow, &facet->nf_flow, &expired);
}
facet->rule->packet_count += facet->packet_count;
facet->rule->byte_count += facet->byte_count;
/* Reset counters to prevent double counting if 'facet' ever gets
* reinstalled. */
facet_reset_counters(facet);
netflow_flow_clear(&facet->nf_flow);
}
/* Searches 'ofproto''s table of facets for one exactly equal to 'flow'.
* Returns it if found, otherwise a null pointer.
*
* The returned facet might need revalidation; use facet_lookup_valid()
* instead if that is important. */
static struct facet *
facet_find(struct ofproto_dpif *ofproto, const struct flow *flow)
{
struct facet *facet;
HMAP_FOR_EACH_WITH_HASH (facet, hmap_node, flow_hash(flow, 0),
&ofproto->facets) {
if (flow_equal(flow, &facet->flow)) {
return facet;
}
}
return NULL;
}
/* Searches 'ofproto''s table of facets for one exactly equal to 'flow'.
* Returns it if found, otherwise a null pointer.
*
* The returned facet is guaranteed to be valid. */
static struct facet *
facet_lookup_valid(struct ofproto_dpif *ofproto, const struct flow *flow)
{
struct facet *facet = facet_find(ofproto, flow);
/* The facet we found might not be valid, since we could be in need of
* revalidation. If it is not valid, don't return it. */
if (facet
&& (ofproto->need_revalidate
|| tag_set_intersects(&ofproto->revalidate_set, facet->tags))
&& !facet_revalidate(ofproto, facet)) {
COVERAGE_INC(facet_invalidated);
return NULL;
}
return facet;
}
/* Re-searches 'ofproto''s classifier for a rule matching 'facet':
*
* - If the rule found is different from 'facet''s current rule, moves
* 'facet' to the new rule and recompiles its actions.
*
* - If the rule found is the same as 'facet''s current rule, leaves 'facet'
* where it is and recompiles its actions anyway.
*
* - If there is none, destroys 'facet'.
*
* Returns true if 'facet' still exists, false if it has been destroyed. */
static bool
facet_revalidate(struct ofproto_dpif *ofproto, struct facet *facet)
{
struct action_xlate_ctx ctx;
struct ofpbuf *odp_actions;
struct rule_dpif *new_rule;
bool actions_changed;
COVERAGE_INC(facet_revalidate);
/* Determine the new rule. */
new_rule = rule_dpif_lookup(ofproto, &facet->flow, 0);
if (!new_rule) {
/* No new rule, so delete the facet. */
facet_remove(ofproto, facet);
return false;
}
/* Calculate new datapath actions.
*
* We do not modify any 'facet' state yet, because we might need to, e.g.,
* emit a NetFlow expiration and, if so, we need to have the old state
* around to properly compose it. */
action_xlate_ctx_init(&ctx, ofproto, &facet->flow, NULL);
odp_actions = xlate_actions(&ctx,
new_rule->up.actions, new_rule->up.n_actions);
actions_changed = (facet->actions_len != odp_actions->size
|| memcmp(facet->actions, odp_actions->data,
facet->actions_len));
/* If the datapath actions changed or the installability changed,
* then we need to talk to the datapath. */
if (actions_changed || ctx.may_set_up_flow != facet->installed) {
if (ctx.may_set_up_flow) {
struct dpif_flow_stats stats;
facet_put__(ofproto, facet,
odp_actions->data, odp_actions->size, &stats);
facet_update_stats(ofproto, facet, &stats);
} else {
facet_uninstall(ofproto, facet);
}
/* The datapath flow is gone or has zeroed stats, so push stats out of
* 'facet' into 'rule'. */
facet_flush_stats(ofproto, facet);
}
/* Update 'facet' now that we've taken care of all the old state. */
facet->tags = ctx.tags;
facet->nf_flow.output_iface = ctx.nf_output_iface;
facet->may_install = ctx.may_set_up_flow;
facet->has_learn = ctx.has_learn;
facet->has_normal = ctx.has_normal;
if (actions_changed) {
free(facet->actions);
facet->actions_len = odp_actions->size;
facet->actions = xmemdup(odp_actions->data, odp_actions->size);
}
if (facet->rule != new_rule) {
COVERAGE_INC(facet_changed_rule);
list_remove(&facet->list_node);
list_push_back(&new_rule->facets, &facet->list_node);
facet->rule = new_rule;
facet->used = new_rule->up.created;
facet->rs_used = facet->used;
}
ofpbuf_delete(odp_actions);
return true;
}
/* Updates 'facet''s used time. Caller is responsible for calling
* facet_push_stats() to update the flows which 'facet' resubmits into. */
static void
facet_update_time(struct ofproto_dpif *ofproto, struct facet *facet,
long long int used)
{
if (used > facet->used) {
facet->used = used;
if (used > facet->rule->used) {
facet->rule->used = used;
}
netflow_flow_update_time(ofproto->netflow, &facet->nf_flow, used);
}
}
/* Folds the statistics from 'stats' into the counters in 'facet'.
*
* Because of the meaning of a facet's counters, it only makes sense to do this
* if 'stats' are not tracked in the datapath, that is, if 'stats' represents a
* packet that was sent by hand or if it represents statistics that have been
* cleared out of the datapath. */
static void
facet_update_stats(struct ofproto_dpif *ofproto, struct facet *facet,
const struct dpif_flow_stats *stats)
{
if (stats->n_packets || stats->used > facet->used) {
facet_update_time(ofproto, facet, stats->used);
facet->packet_count += stats->n_packets;
facet->byte_count += stats->n_bytes;
facet_push_stats(facet);
netflow_flow_update_flags(&facet->nf_flow, stats->tcp_flags);
}
}
static void
facet_reset_counters(struct facet *facet)
{
facet->packet_count = 0;
facet->byte_count = 0;
facet->rs_packet_count = 0;
facet->rs_byte_count = 0;
facet->accounted_bytes = 0;
}
static void
facet_push_stats(struct facet *facet)
{
uint64_t rs_packets, rs_bytes;
assert(facet->packet_count >= facet->rs_packet_count);
assert(facet->byte_count >= facet->rs_byte_count);
assert(facet->used >= facet->rs_used);
rs_packets = facet->packet_count - facet->rs_packet_count;
rs_bytes = facet->byte_count - facet->rs_byte_count;
if (rs_packets || rs_bytes || facet->used > facet->rs_used) {
facet->rs_packet_count = facet->packet_count;
facet->rs_byte_count = facet->byte_count;
facet->rs_used = facet->used;
flow_push_stats(facet->rule, &facet->flow,
rs_packets, rs_bytes, facet->used);
}
}
struct ofproto_push {
struct action_xlate_ctx ctx;
uint64_t packets;
uint64_t bytes;
long long int used;
};
static void
push_resubmit(struct action_xlate_ctx *ctx, struct rule_dpif *rule)
{
struct ofproto_push *push = CONTAINER_OF(ctx, struct ofproto_push, ctx);
if (rule) {
rule->packet_count += push->packets;
rule->byte_count += push->bytes;
rule->used = MAX(push->used, rule->used);
}
}
/* Pushes flow statistics to the rules which 'flow' resubmits into given
* 'rule''s actions. */
static void
flow_push_stats(const struct rule_dpif *rule,
struct flow *flow, uint64_t packets, uint64_t bytes,
long long int used)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(rule->up.ofproto);
struct ofproto_push push;
push.packets = packets;
push.bytes = bytes;
push.used = used;
action_xlate_ctx_init(&push.ctx, ofproto, flow, NULL);
push.ctx.resubmit_hook = push_resubmit;
ofpbuf_delete(xlate_actions(&push.ctx,
rule->up.actions, rule->up.n_actions));
}
/* Rules. */
static struct rule_dpif *
rule_dpif_lookup(struct ofproto_dpif *ofproto, const struct flow *flow,
uint8_t table_id)
{
struct cls_rule *cls_rule;
struct classifier *cls;
if (table_id >= N_TABLES) {
return NULL;
}
cls = &ofproto->up.tables[table_id];
if (flow->nw_frag & FLOW_NW_FRAG_ANY
&& ofproto->up.frag_handling == OFPC_FRAG_NORMAL) {
/* For OFPC_NORMAL frag_handling, we must pretend that transport ports
* are unavailable. */
struct flow ofpc_normal_flow = *flow;
ofpc_normal_flow.tp_src = htons(0);
ofpc_normal_flow.tp_dst = htons(0);
cls_rule = classifier_lookup(cls, &ofpc_normal_flow);
} else {
cls_rule = classifier_lookup(cls, flow);
}
return rule_dpif_cast(rule_from_cls_rule(cls_rule));
}
static void
complete_operation(struct rule_dpif *rule)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(rule->up.ofproto);
rule_invalidate(rule);
if (clogged) {
struct dpif_completion *c = xmalloc(sizeof *c);
c->op = rule->up.pending;
list_push_back(&ofproto->completions, &c->list_node);
} else {
ofoperation_complete(rule->up.pending, 0);
}
}
static struct rule *
rule_alloc(void)
{
struct rule_dpif *rule = xmalloc(sizeof *rule);
return &rule->up;
}
static void
rule_dealloc(struct rule *rule_)
{
struct rule_dpif *rule = rule_dpif_cast(rule_);
free(rule);
}
static int
rule_construct(struct rule *rule_)
{
struct rule_dpif *rule = rule_dpif_cast(rule_);
struct ofproto_dpif *ofproto = ofproto_dpif_cast(rule->up.ofproto);
struct rule_dpif *victim;
uint8_t table_id;
int error;
error = validate_actions(rule->up.actions, rule->up.n_actions,
&rule->up.cr.flow, ofproto->max_ports);
if (error) {
return error;
}
rule->used = rule->up.created;
rule->packet_count = 0;
rule->byte_count = 0;
victim = rule_dpif_cast(ofoperation_get_victim(rule->up.pending));
if (victim && !list_is_empty(&victim->facets)) {
struct facet *facet;
rule->facets = victim->facets;
list_moved(&rule->facets);
LIST_FOR_EACH (facet, list_node, &rule->facets) {
/* XXX: We're only clearing our local counters here. It's possible
* that quite a few packets are unaccounted for in the datapath
* statistics. These will be accounted to the new rule instead of
* cleared as required. This could be fixed by clearing out the
* datapath statistics for this facet, but currently it doesn't
* seem worth it. */
facet_reset_counters(facet);
facet->rule = rule;
}
} else {
/* Must avoid list_moved() in this case. */
list_init(&rule->facets);
}
table_id = rule->up.table_id;
rule->tag = (victim ? victim->tag
: table_id == 0 ? 0
: rule_calculate_tag(&rule->up.cr.flow, &rule->up.cr.wc,
ofproto->tables[table_id].basis));
complete_operation(rule);
return 0;
}
static void
rule_destruct(struct rule *rule_)
{
struct rule_dpif *rule = rule_dpif_cast(rule_);
struct ofproto_dpif *ofproto = ofproto_dpif_cast(rule->up.ofproto);
struct facet *facet, *next_facet;
LIST_FOR_EACH_SAFE (facet, next_facet, list_node, &rule->facets) {
facet_revalidate(ofproto, facet);
}
complete_operation(rule);
}
static void
rule_get_stats(struct rule *rule_, uint64_t *packets, uint64_t *bytes)
{
struct rule_dpif *rule = rule_dpif_cast(rule_);
struct facet *facet;
/* Start from historical data for 'rule' itself that are no longer tracked
* in facets. This counts, for example, facets that have expired. */
*packets = rule->packet_count;
*bytes = rule->byte_count;
/* Add any statistics that are tracked by facets. This includes
* statistical data recently updated by ofproto_update_stats() as well as
* stats for packets that were executed "by hand" via dpif_execute(). */
LIST_FOR_EACH (facet, list_node, &rule->facets) {
*packets += facet->packet_count;
*bytes += facet->byte_count;
}
}
static int
rule_execute(struct rule *rule_, struct flow *flow, struct ofpbuf *packet)
{
struct rule_dpif *rule = rule_dpif_cast(rule_);
struct ofproto_dpif *ofproto = ofproto_dpif_cast(rule->up.ofproto);
struct action_xlate_ctx ctx;
struct ofpbuf *odp_actions;
struct facet *facet;
size_t size;
/* First look for a related facet. If we find one, account it to that. */
facet = facet_lookup_valid(ofproto, flow);
if (facet && facet->rule == rule) {
if (!facet->may_install) {
facet_make_actions(ofproto, facet, packet);
}
facet_execute(ofproto, facet, packet);
return 0;
}
/* Otherwise, if 'rule' is in fact the correct rule for 'packet', then
* create a new facet for it and use that. */
if (rule_dpif_lookup(ofproto, flow, 0) == rule) {
facet = facet_create(rule, flow);
facet_make_actions(ofproto, facet, packet);
facet_execute(ofproto, facet, packet);
facet_install(ofproto, facet, true);
return 0;
}
/* We can't account anything to a facet. If we were to try, then that
* facet would have a non-matching rule, busting our invariants. */
action_xlate_ctx_init(&ctx, ofproto, flow, packet);
odp_actions = xlate_actions(&ctx, rule->up.actions, rule->up.n_actions);
size = packet->size;
if (execute_odp_actions(ofproto, flow, odp_actions->data,
odp_actions->size, packet)) {
rule->used = time_msec();
rule->packet_count++;
rule->byte_count += size;
flow_push_stats(rule, flow, 1, size, rule->used);
}
ofpbuf_delete(odp_actions);
return 0;
}
static void
rule_modify_actions(struct rule *rule_)
{
struct rule_dpif *rule = rule_dpif_cast(rule_);
struct ofproto_dpif *ofproto = ofproto_dpif_cast(rule->up.ofproto);
int error;
error = validate_actions(rule->up.actions, rule->up.n_actions,
&rule->up.cr.flow, ofproto->max_ports);
if (error) {
ofoperation_complete(rule->up.pending, error);
return;
}
complete_operation(rule);
}
/* Sends 'packet' out of port 'odp_port' within 'ofproto'.
* Returns 0 if successful, otherwise a positive errno value. */
static int
send_packet(struct ofproto_dpif *ofproto, uint32_t odp_port,
const struct ofpbuf *packet)
{
struct ofpbuf key, odp_actions;
struct odputil_keybuf keybuf;
struct flow flow;
int error;
flow_extract((struct ofpbuf *) packet, 0, 0, 0, &flow);
ofpbuf_use_stack(&key, &keybuf, sizeof keybuf);
odp_flow_key_from_flow(&key, &flow);
ofpbuf_init(&odp_actions, 32);
compose_sflow_action(ofproto, &odp_actions, &flow, odp_port);
nl_msg_put_u32(&odp_actions, OVS_ACTION_ATTR_OUTPUT, odp_port);
error = dpif_execute(ofproto->dpif,
key.data, key.size,
odp_actions.data, odp_actions.size,
packet);
ofpbuf_uninit(&odp_actions);
if (error) {
VLOG_WARN_RL(&rl, "%s: failed to send packet on port %"PRIu32" (%s)",
ofproto->up.name, odp_port, strerror(error));
}
return error;
}
/* OpenFlow to datapath action translation. */
static void do_xlate_actions(const union ofp_action *in, size_t n_in,
struct action_xlate_ctx *ctx);
static void xlate_normal(struct action_xlate_ctx *);
static size_t
put_userspace_action(const struct ofproto_dpif *ofproto,
struct ofpbuf *odp_actions,
const struct flow *flow,
const struct user_action_cookie *cookie)
{
size_t offset;
uint32_t pid;
pid = dpif_port_get_pid(ofproto->dpif,
ofp_port_to_odp_port(flow->in_port));
offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_USERSPACE);
nl_msg_put_u32(odp_actions, OVS_USERSPACE_ATTR_PID, pid);
nl_msg_put_unspec(odp_actions, OVS_USERSPACE_ATTR_USERDATA,
cookie, sizeof *cookie);
nl_msg_end_nested(odp_actions, offset);
return odp_actions->size - NLA_ALIGN(sizeof *cookie);
}
/* Compose SAMPLE action for sFlow. */
static size_t
compose_sflow_action(const struct ofproto_dpif *ofproto,
struct ofpbuf *odp_actions,
const struct flow *flow,
uint32_t odp_port)
{
uint32_t port_ifindex;
uint32_t probability;
struct user_action_cookie cookie;
size_t sample_offset, actions_offset;
int cookie_offset, n_output;
if (!ofproto->sflow || flow->in_port == OFPP_NONE) {
return 0;
}
if (odp_port == OVSP_NONE) {
port_ifindex = 0;
n_output = 0;
} else {
port_ifindex = dpif_sflow_odp_port_to_ifindex(ofproto->sflow, odp_port);
n_output = 1;
}
sample_offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_SAMPLE);
/* Number of packets out of UINT_MAX to sample. */
probability = dpif_sflow_get_probability(ofproto->sflow);
nl_msg_put_u32(odp_actions, OVS_SAMPLE_ATTR_PROBABILITY, probability);
actions_offset = nl_msg_start_nested(odp_actions, OVS_SAMPLE_ATTR_ACTIONS);
cookie.type = USER_ACTION_COOKIE_SFLOW;
cookie.data = port_ifindex;
cookie.n_output = n_output;
cookie.vlan_tci = 0;
cookie_offset = put_userspace_action(ofproto, odp_actions, flow, &cookie);
nl_msg_end_nested(odp_actions, actions_offset);
nl_msg_end_nested(odp_actions, sample_offset);
return cookie_offset;
}
/* SAMPLE action must be first action in any given list of actions.
* At this point we do not have all information required to build it. So try to
* build sample action as complete as possible. */
static void
add_sflow_action(struct action_xlate_ctx *ctx)
{
ctx->user_cookie_offset = compose_sflow_action(ctx->ofproto,
ctx->odp_actions,
&ctx->flow, OVSP_NONE);
ctx->sflow_odp_port = 0;
ctx->sflow_n_outputs = 0;
}
/* Fix SAMPLE action according to data collected while composing ODP actions.
* We need to fix SAMPLE actions OVS_SAMPLE_ATTR_ACTIONS attribute, i.e. nested
* USERSPACE action's user-cookie which is required for sflow. */
static void
fix_sflow_action(struct action_xlate_ctx *ctx)
{
const struct flow *base = &ctx->base_flow;
struct user_action_cookie *cookie;
if (!ctx->user_cookie_offset) {
return;
}
cookie = ofpbuf_at(ctx->odp_actions, ctx->user_cookie_offset,
sizeof(*cookie));
assert(cookie != NULL);
assert(cookie->type == USER_ACTION_COOKIE_SFLOW);
if (ctx->sflow_n_outputs) {
cookie->data = dpif_sflow_odp_port_to_ifindex(ctx->ofproto->sflow,
ctx->sflow_odp_port);
}
if (ctx->sflow_n_outputs >= 255) {
cookie->n_output = 255;
} else {
cookie->n_output = ctx->sflow_n_outputs;
}
cookie->vlan_tci = base->vlan_tci;
}
static void
commit_action__(struct ofpbuf *odp_actions,
enum ovs_action_attr act_type,
enum ovs_key_attr key_type,
const void *key, size_t key_size)
{
size_t offset = nl_msg_start_nested(odp_actions, act_type);
nl_msg_put_unspec(odp_actions, key_type, key, key_size);
nl_msg_end_nested(odp_actions, offset);
}
static void
commit_set_tun_id_action(const struct flow *flow, struct flow *base,
struct ofpbuf *odp_actions)
{
if (base->tun_id == flow->tun_id) {
return;
}
base->tun_id = flow->tun_id;
commit_action__(odp_actions, OVS_ACTION_ATTR_SET,
OVS_KEY_ATTR_TUN_ID, &base->tun_id, sizeof(base->tun_id));
}
static void
commit_set_ether_addr_action(const struct flow *flow, struct flow *base,
struct ofpbuf *odp_actions)
{
struct ovs_key_ethernet eth_key;
if (eth_addr_equals(base->dl_src, flow->dl_src) &&
eth_addr_equals(base->dl_dst, flow->dl_dst)) {
return;
}
memcpy(base->dl_src, flow->dl_src, ETH_ADDR_LEN);
memcpy(base->dl_dst, flow->dl_dst, ETH_ADDR_LEN);
memcpy(eth_key.eth_src, base->dl_src, ETH_ADDR_LEN);
memcpy(eth_key.eth_dst, base->dl_dst, ETH_ADDR_LEN);
commit_action__(odp_actions, OVS_ACTION_ATTR_SET,
OVS_KEY_ATTR_ETHERNET, &eth_key, sizeof(eth_key));
}
static void
commit_vlan_action(struct action_xlate_ctx *ctx, ovs_be16 new_tci)
{
struct flow *base = &ctx->base_flow;
if (base->vlan_tci == new_tci) {
return;
}
if (base->vlan_tci & htons(VLAN_CFI)) {
nl_msg_put_u16(ctx->odp_actions, OVS_ACTION_ATTR_POP,
OVS_KEY_ATTR_8021Q);
}
if (new_tci & htons(VLAN_CFI)) {
struct ovs_key_8021q q_key;
q_key.q_tpid = htons(ETH_TYPE_VLAN);
q_key.q_tci = new_tci & ~htons(VLAN_CFI);
commit_action__(ctx->odp_actions, OVS_ACTION_ATTR_PUSH,
OVS_KEY_ATTR_8021Q, &q_key, sizeof(q_key));
}
base->vlan_tci = new_tci;
}
static void
commit_set_nw_action(const struct flow *flow, struct flow *base,
struct ofpbuf *odp_actions)
{
struct ovs_key_ipv4 ipv4_key;
if (base->dl_type != htons(ETH_TYPE_IP) ||
!base->nw_src || !base->nw_dst) {
return;
}
if (base->nw_src == flow->nw_src &&
base->nw_dst == flow->nw_dst &&
base->nw_tos == flow->nw_tos &&
base->nw_ttl == flow->nw_ttl &&
base->nw_frag == flow->nw_frag) {
return;
}
ipv4_key.ipv4_src = base->nw_src = flow->nw_src;
ipv4_key.ipv4_dst = base->nw_dst = flow->nw_dst;
ipv4_key.ipv4_proto = base->nw_proto;
ipv4_key.ipv4_tos = flow->nw_tos;
ipv4_key.ipv4_ttl = flow->nw_ttl;
ipv4_key.ipv4_frag = (base->nw_frag == 0 ? OVS_FRAG_TYPE_NONE
: base->nw_frag == FLOW_NW_FRAG_ANY
? OVS_FRAG_TYPE_FIRST : OVS_FRAG_TYPE_LATER);
commit_action__(odp_actions, OVS_ACTION_ATTR_SET,
OVS_KEY_ATTR_IPV4, &ipv4_key, sizeof(ipv4_key));
}
static void
commit_set_port_action(const struct flow *flow, struct flow *base,
struct ofpbuf *odp_actions)
{
if (!base->tp_src || !base->tp_dst) {
return;
}
if (base->tp_src == flow->tp_src &&
base->tp_dst == flow->tp_dst) {
return;
}
if (flow->nw_proto == IPPROTO_TCP) {
struct ovs_key_tcp port_key;
port_key.tcp_src = base->tp_src = flow->tp_src;
port_key.tcp_dst = base->tp_dst = flow->tp_dst;
commit_action__(odp_actions, OVS_ACTION_ATTR_SET,
OVS_KEY_ATTR_TCP, &port_key, sizeof(port_key));
} else if (flow->nw_proto == IPPROTO_UDP) {
struct ovs_key_udp port_key;
port_key.udp_src = base->tp_src = flow->tp_src;
port_key.udp_dst = base->tp_dst = flow->tp_dst;
commit_action__(odp_actions, OVS_ACTION_ATTR_SET,
OVS_KEY_ATTR_UDP, &port_key, sizeof(port_key));
}
}
static void
commit_set_priority_action(const struct flow *flow, struct flow *base,
struct ofpbuf *odp_actions)
{
if (base->priority == flow->priority) {
return;
}
base->priority = flow->priority;
commit_action__(odp_actions, OVS_ACTION_ATTR_SET,
OVS_KEY_ATTR_PRIORITY, &base->priority,
sizeof(base->priority));
}
static void
commit_odp_actions(struct action_xlate_ctx *ctx)
{
const struct flow *flow = &ctx->flow;
struct flow *base = &ctx->base_flow;
struct ofpbuf *odp_actions = ctx->odp_actions;
commit_set_tun_id_action(flow, base, odp_actions);
commit_set_ether_addr_action(flow, base, odp_actions);
commit_vlan_action(ctx, flow->vlan_tci);
commit_set_nw_action(flow, base, odp_actions);
commit_set_port_action(flow, base, odp_actions);
commit_set_priority_action(flow, base, odp_actions);
}
static void
compose_output_action(struct action_xlate_ctx *ctx, uint16_t odp_port)
{
nl_msg_put_u32(ctx->odp_actions, OVS_ACTION_ATTR_OUTPUT, odp_port);
ctx->sflow_odp_port = odp_port;
ctx->sflow_n_outputs++;
}
static void
add_output_action(struct action_xlate_ctx *ctx, uint16_t ofp_port)
{
const struct ofport_dpif *ofport = get_ofp_port(ctx->ofproto, ofp_port);
uint16_t odp_port = ofp_port_to_odp_port(ofp_port);
if (ofport) {
if (ofport->up.opp.config & htonl(OFPPC_NO_FWD)
|| !stp_forward_in_state(ofport->stp_state)) {
/* Forwarding disabled on port. */
return;
}
} else {
/*
* We don't have an ofport record for this port, but it doesn't hurt to
* allow forwarding to it anyhow. Maybe such a port will appear later
* and we're pre-populating the flow table.
*/
}
commit_odp_actions(ctx);
compose_output_action(ctx, odp_port);
ctx->nf_output_iface = ofp_port;
}
static void
xlate_table_action(struct action_xlate_ctx *ctx,
uint16_t in_port, uint8_t table_id)
{
if (ctx->recurse < MAX_RESUBMIT_RECURSION) {
struct ofproto_dpif *ofproto = ctx->ofproto;
struct rule_dpif *rule;
uint16_t old_in_port;
uint8_t old_table_id;
old_table_id = ctx->table_id;
ctx->table_id = table_id;
/* Look up a flow with 'in_port' as the input port. */
old_in_port = ctx->flow.in_port;
ctx->flow.in_port = in_port;
rule = rule_dpif_lookup(ofproto, &ctx->flow, table_id);
/* Tag the flow. */
if (table_id > 0 && table_id < N_TABLES) {
struct table_dpif *table = &ofproto->tables[table_id];
if (table->other_table) {
ctx->tags |= (rule
? rule->tag
: rule_calculate_tag(&ctx->flow,
&table->other_table->wc,
table->basis));
}
}
/* Restore the original input port. Otherwise OFPP_NORMAL and
* OFPP_IN_PORT will have surprising behavior. */
ctx->flow.in_port = old_in_port;
if (ctx->resubmit_hook) {
ctx->resubmit_hook(ctx, rule);
}
if (rule) {
ctx->recurse++;
do_xlate_actions(rule->up.actions, rule->up.n_actions, ctx);
ctx->recurse--;
}
ctx->table_id = old_table_id;
} else {
static struct vlog_rate_limit recurse_rl = VLOG_RATE_LIMIT_INIT(1, 1);
VLOG_ERR_RL(&recurse_rl, "resubmit actions recursed over %d times",
MAX_RESUBMIT_RECURSION);
}
}
static void
xlate_resubmit_table(struct action_xlate_ctx *ctx,
const struct nx_action_resubmit *nar)
{
uint16_t in_port;
uint8_t table_id;
in_port = (nar->in_port == htons(OFPP_IN_PORT)
? ctx->flow.in_port
: ntohs(nar->in_port));
table_id = nar->table == 255 ? ctx->table_id : nar->table;
xlate_table_action(ctx, in_port, table_id);
}
static void
flood_packets(struct action_xlate_ctx *ctx, ovs_be32 mask)
{
struct ofport_dpif *ofport;
commit_odp_actions(ctx);
HMAP_FOR_EACH (ofport, up.hmap_node, &ctx->ofproto->up.ports) {
uint16_t ofp_port = ofport->up.ofp_port;
if (ofp_port != ctx->flow.in_port
&& !(ofport->up.opp.config & mask)
&& stp_forward_in_state(ofport->stp_state)) {
compose_output_action(ctx, ofport->odp_port);
}
}
ctx->nf_output_iface = NF_OUT_FLOOD;
}
static void
compose_controller_action(struct action_xlate_ctx *ctx, int len)
{
struct user_action_cookie cookie;
cookie.type = USER_ACTION_COOKIE_CONTROLLER;
cookie.data = len;
cookie.n_output = 0;
cookie.vlan_tci = 0;
put_userspace_action(ctx->ofproto, ctx->odp_actions, &ctx->flow, &cookie);
}
static void
xlate_output_action__(struct action_xlate_ctx *ctx,
uint16_t port, uint16_t max_len)
{
uint16_t prev_nf_output_iface = ctx->nf_output_iface;
ctx->nf_output_iface = NF_OUT_DROP;
switch (port) {
case OFPP_IN_PORT:
add_output_action(ctx, ctx->flow.in_port);
break;
case OFPP_TABLE:
xlate_table_action(ctx, ctx->flow.in_port, ctx->table_id);
break;
case OFPP_NORMAL:
xlate_normal(ctx);
break;
case OFPP_FLOOD:
flood_packets(ctx, htonl(OFPPC_NO_FLOOD));
break;
case OFPP_ALL:
flood_packets(ctx, htonl(0));
break;
case OFPP_CONTROLLER:
commit_odp_actions(ctx);
compose_controller_action(ctx, max_len);
break;
case OFPP_LOCAL:
add_output_action(ctx, OFPP_LOCAL);
break;
case OFPP_NONE:
break;
default:
if (port != ctx->flow.in_port) {
add_output_action(ctx, port);
}
break;
}
if (prev_nf_output_iface == NF_OUT_FLOOD) {
ctx->nf_output_iface = NF_OUT_FLOOD;
} else if (ctx->nf_output_iface == NF_OUT_DROP) {
ctx->nf_output_iface = prev_nf_output_iface;
} else if (prev_nf_output_iface != NF_OUT_DROP &&
ctx->nf_output_iface != NF_OUT_FLOOD) {
ctx->nf_output_iface = NF_OUT_MULTI;
}
}
static void
xlate_output_reg_action(struct action_xlate_ctx *ctx,
const struct nx_action_output_reg *naor)
{
uint64_t ofp_port;
ofp_port = nxm_read_field_bits(naor->src, naor->ofs_nbits, &ctx->flow);
if (ofp_port <= UINT16_MAX) {
xlate_output_action__(ctx, ofp_port, ntohs(naor->max_len));
}
}
static void
xlate_output_action(struct action_xlate_ctx *ctx,
const struct ofp_action_output *oao)
{
xlate_output_action__(ctx, ntohs(oao->port), ntohs(oao->max_len));
}
static void
xlate_enqueue_action(struct action_xlate_ctx *ctx,
const struct ofp_action_enqueue *oae)
{
uint16_t ofp_port, odp_port;
uint32_t flow_priority, priority;
int error;
error = dpif_queue_to_priority(ctx->ofproto->dpif, ntohl(oae->queue_id),
&priority);
if (error) {
/* Fall back to ordinary output action. */
xlate_output_action__(ctx, ntohs(oae->port), 0);
return;
}
/* Figure out datapath output port. */
ofp_port = ntohs(oae->port);
if (ofp_port == OFPP_IN_PORT) {
ofp_port = ctx->flow.in_port;
} else if (ofp_port == ctx->flow.in_port) {
return;
}
odp_port = ofp_port_to_odp_port(ofp_port);
/* Add datapath actions. */
flow_priority = ctx->flow.priority;
ctx->flow.priority = priority;
add_output_action(ctx, odp_port);
ctx->flow.priority = flow_priority;
/* Update NetFlow output port. */
if (ctx->nf_output_iface == NF_OUT_DROP) {
ctx->nf_output_iface = odp_port;
} else if (ctx->nf_output_iface != NF_OUT_FLOOD) {
ctx->nf_output_iface = NF_OUT_MULTI;
}
}
static void
xlate_set_queue_action(struct action_xlate_ctx *ctx,
const struct nx_action_set_queue *nasq)
{
uint32_t priority;
int error;
error = dpif_queue_to_priority(ctx->ofproto->dpif, ntohl(nasq->queue_id),
&priority);
if (error) {
/* Couldn't translate queue to a priority, so ignore. A warning
* has already been logged. */
return;
}
ctx->flow.priority = priority;
}
struct xlate_reg_state {
ovs_be16 vlan_tci;
ovs_be64 tun_id;
};
static void
xlate_autopath(struct action_xlate_ctx *ctx,
const struct nx_action_autopath *naa)
{
uint16_t ofp_port = ntohl(naa->id);
struct ofport_dpif *port = get_ofp_port(ctx->ofproto, ofp_port);
if (!port || !port->bundle) {
ofp_port = OFPP_NONE;
} else if (port->bundle->bond) {
/* Autopath does not support VLAN hashing. */
struct ofport_dpif *slave = bond_choose_output_slave(
port->bundle->bond, &ctx->flow, 0, &ctx->tags);
if (slave) {
ofp_port = slave->up.ofp_port;
}
}
autopath_execute(naa, &ctx->flow, ofp_port);
}
static bool
slave_enabled_cb(uint16_t ofp_port, void *ofproto_)
{
struct ofproto_dpif *ofproto = ofproto_;
struct ofport_dpif *port;
switch (ofp_port) {
case OFPP_IN_PORT:
case OFPP_TABLE:
case OFPP_NORMAL:
case OFPP_FLOOD:
case OFPP_ALL:
case OFPP_NONE:
return true;
case OFPP_CONTROLLER: /* Not supported by the bundle action. */
return false;
default:
port = get_ofp_port(ofproto, ofp_port);
return port ? port->may_enable : false;
}
}
static void
xlate_learn_action(struct action_xlate_ctx *ctx,
const struct nx_action_learn *learn)
{
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1);
struct ofputil_flow_mod fm;
int error;
learn_execute(learn, &ctx->flow, &fm);
error = ofproto_flow_mod(&ctx->ofproto->up, &fm);
if (error && !VLOG_DROP_WARN(&rl)) {
char *msg = ofputil_error_to_string(error);
VLOG_WARN("learning action failed to modify flow table (%s)", msg);
free(msg);
}
free(fm.actions);
}
static bool
may_receive(const struct ofport_dpif *port, struct action_xlate_ctx *ctx)
{
if (port->up.opp.config & (eth_addr_equals(ctx->flow.dl_dst, eth_addr_stp)
? htonl(OFPPC_NO_RECV_STP)
: htonl(OFPPC_NO_RECV))) {
return false;
}
/* Only drop packets here if both forwarding and learning are
* disabled. If just learning is enabled, we need to have
* OFPP_NORMAL and the learning action have a look at the packet
* before we can drop it. */
if (!stp_forward_in_state(port->stp_state)
&& !stp_learn_in_state(port->stp_state)) {
return false;
}
return true;
}
static void
do_xlate_actions(const union ofp_action *in, size_t n_in,
struct action_xlate_ctx *ctx)
{
const struct ofport_dpif *port;
const union ofp_action *ia;
size_t left;
port = get_ofp_port(ctx->ofproto, ctx->flow.in_port);
if (port && !may_receive(port, ctx)) {
/* Drop this flow. */
return;
}
OFPUTIL_ACTION_FOR_EACH_UNSAFE (ia, left, in, n_in) {
const struct ofp_action_dl_addr *oada;
const struct nx_action_resubmit *nar;
const struct nx_action_set_tunnel *nast;
const struct nx_action_set_queue *nasq;
const struct nx_action_multipath *nam;
const struct nx_action_autopath *naa;
const struct nx_action_bundle *nab;
const struct nx_action_output_reg *naor;
enum ofputil_action_code code;
ovs_be64 tun_id;
if (ctx->exit) {
break;
}
code = ofputil_decode_action_unsafe(ia);
switch (code) {
case OFPUTIL_OFPAT_OUTPUT:
xlate_output_action(ctx, &ia->output);
break;
case OFPUTIL_OFPAT_SET_VLAN_VID:
ctx->flow.vlan_tci &= ~htons(VLAN_VID_MASK);
ctx->flow.vlan_tci |= ia->vlan_vid.vlan_vid | htons(VLAN_CFI);
break;
case OFPUTIL_OFPAT_SET_VLAN_PCP:
ctx->flow.vlan_tci &= ~htons(VLAN_PCP_MASK);
ctx->flow.vlan_tci |= htons(
(ia->vlan_pcp.vlan_pcp << VLAN_PCP_SHIFT) | VLAN_CFI);
break;
case OFPUTIL_OFPAT_STRIP_VLAN:
ctx->flow.vlan_tci = htons(0);
break;
case OFPUTIL_OFPAT_SET_DL_SRC:
oada = ((struct ofp_action_dl_addr *) ia);
memcpy(ctx->flow.dl_src, oada->dl_addr, ETH_ADDR_LEN);
break;
case OFPUTIL_OFPAT_SET_DL_DST:
oada = ((struct ofp_action_dl_addr *) ia);
memcpy(ctx->flow.dl_dst, oada->dl_addr, ETH_ADDR_LEN);
break;
case OFPUTIL_OFPAT_SET_NW_SRC:
ctx->flow.nw_src = ia->nw_addr.nw_addr;
break;
case OFPUTIL_OFPAT_SET_NW_DST:
ctx->flow.nw_dst = ia->nw_addr.nw_addr;
break;
case OFPUTIL_OFPAT_SET_NW_TOS:
ctx->flow.nw_tos &= ~IP_DSCP_MASK;
ctx->flow.nw_tos |= ia->nw_tos.nw_tos & IP_DSCP_MASK;
break;
case OFPUTIL_OFPAT_SET_TP_SRC:
ctx->flow.tp_src = ia->tp_port.tp_port;
break;
case OFPUTIL_OFPAT_SET_TP_DST:
ctx->flow.tp_dst = ia->tp_port.tp_port;
break;
case OFPUTIL_OFPAT_ENQUEUE:
xlate_enqueue_action(ctx, (const struct ofp_action_enqueue *) ia);
break;
case OFPUTIL_NXAST_RESUBMIT:
nar = (const struct nx_action_resubmit *) ia;
xlate_table_action(ctx, ntohs(nar->in_port), ctx->table_id);
break;
case OFPUTIL_NXAST_RESUBMIT_TABLE:
xlate_resubmit_table(ctx, (const struct nx_action_resubmit *) ia);
break;
case OFPUTIL_NXAST_SET_TUNNEL:
nast = (const struct nx_action_set_tunnel *) ia;
tun_id = htonll(ntohl(nast->tun_id));
ctx->flow.tun_id = tun_id;
break;
case OFPUTIL_NXAST_SET_QUEUE:
nasq = (const struct nx_action_set_queue *) ia;
xlate_set_queue_action(ctx, nasq);
break;
case OFPUTIL_NXAST_POP_QUEUE:
ctx->flow.priority = ctx->original_priority;
break;
case OFPUTIL_NXAST_REG_MOVE:
nxm_execute_reg_move((const struct nx_action_reg_move *) ia,
&ctx->flow);
break;
case OFPUTIL_NXAST_REG_LOAD:
nxm_execute_reg_load((const struct nx_action_reg_load *) ia,
&ctx->flow);
break;
case OFPUTIL_NXAST_NOTE:
/* Nothing to do. */
break;
case OFPUTIL_NXAST_SET_TUNNEL64:
tun_id = ((const struct nx_action_set_tunnel64 *) ia)->tun_id;
ctx->flow.tun_id = tun_id;
break;
case OFPUTIL_NXAST_MULTIPATH:
nam = (const struct nx_action_multipath *) ia;
multipath_execute(nam, &ctx->flow);
break;
case OFPUTIL_NXAST_AUTOPATH:
naa = (const struct nx_action_autopath *) ia;
xlate_autopath(ctx, naa);
break;
case OFPUTIL_NXAST_BUNDLE:
ctx->ofproto->has_bundle_action = true;
nab = (const struct nx_action_bundle *) ia;
xlate_output_action__(ctx, bundle_execute(nab, &ctx->flow,
slave_enabled_cb,
ctx->ofproto), 0);
break;
case OFPUTIL_NXAST_BUNDLE_LOAD:
ctx->ofproto->has_bundle_action = true;
nab = (const struct nx_action_bundle *) ia;
bundle_execute_load(nab, &ctx->flow, slave_enabled_cb,
ctx->ofproto);
break;
case OFPUTIL_NXAST_OUTPUT_REG:
naor = (const struct nx_action_output_reg *) ia;
xlate_output_reg_action(ctx, naor);
break;
case OFPUTIL_NXAST_LEARN:
ctx->has_learn = true;
if (ctx->may_learn) {
xlate_learn_action(ctx, (const struct nx_action_learn *) ia);
}
break;
case OFPUTIL_NXAST_EXIT:
ctx->exit = true;
break;
}
}
/* We've let OFPP_NORMAL and the learning action look at the packet,
* so drop it now if forwarding is disabled. */
if (port && !stp_forward_in_state(port->stp_state)) {
ofpbuf_clear(ctx->odp_actions);
add_sflow_action(ctx);
}
}
static void
action_xlate_ctx_init(struct action_xlate_ctx *ctx,
struct ofproto_dpif *ofproto, const struct flow *flow,
const struct ofpbuf *packet)
{
ctx->ofproto = ofproto;
ctx->flow = *flow;
ctx->packet = packet;
ctx->may_learn = packet != NULL;
ctx->resubmit_hook = NULL;
}
static struct ofpbuf *
xlate_actions(struct action_xlate_ctx *ctx,
const union ofp_action *in, size_t n_in)
{
COVERAGE_INC(ofproto_dpif_xlate);
ctx->odp_actions = ofpbuf_new(512);
ofpbuf_reserve(ctx->odp_actions, NL_A_U32_SIZE);
ctx->tags = 0;
ctx->may_set_up_flow = true;
ctx->has_learn = false;
ctx->has_normal = false;
ctx->nf_output_iface = NF_OUT_DROP;
ctx->recurse = 0;
ctx->original_priority = ctx->flow.priority;
ctx->base_flow = ctx->flow;
ctx->base_flow.tun_id = 0;
ctx->table_id = 0;
ctx->exit = false;
if (ctx->flow.nw_frag & FLOW_NW_FRAG_ANY) {
switch (ctx->ofproto->up.frag_handling) {
case OFPC_FRAG_NORMAL:
/* We must pretend that transport ports are unavailable. */
ctx->flow.tp_src = ctx->base_flow.tp_src = htons(0);
ctx->flow.tp_dst = ctx->base_flow.tp_dst = htons(0);
break;
case OFPC_FRAG_DROP:
return ctx->odp_actions;
case OFPC_FRAG_REASM:
NOT_REACHED();
case OFPC_FRAG_NX_MATCH:
/* Nothing to do. */
break;
}
}
if (process_special(ctx->ofproto, &ctx->flow, ctx->packet)) {
ctx->may_set_up_flow = false;
return ctx->odp_actions;
} else {
add_sflow_action(ctx);
do_xlate_actions(in, n_in, ctx);
if (!connmgr_may_set_up_flow(ctx->ofproto->up.connmgr, &ctx->flow,
ctx->odp_actions->data,
ctx->odp_actions->size)) {
ctx->may_set_up_flow = false;
if (ctx->packet
&& connmgr_msg_in_hook(ctx->ofproto->up.connmgr, &ctx->flow,
ctx->packet)) {
compose_output_action(ctx, OVSP_LOCAL);
}
}
fix_sflow_action(ctx);
}
return ctx->odp_actions;
}
/* OFPP_NORMAL implementation. */
struct dst {
struct ofport_dpif *port;
uint16_t vid;
};
struct dst_set {
struct dst builtin[32];
struct dst *dsts;
size_t n, allocated;
};
static void dst_set_init(struct dst_set *);
static void dst_set_add(struct dst_set *, const struct dst *);
static void dst_set_free(struct dst_set *);
static struct ofport_dpif *ofbundle_get_a_port(const struct ofbundle *);
/* Given 'vid', the VID obtained from the 802.1Q header that was received as
* part of a packet (specify 0 if there was no 802.1Q header), and 'in_bundle',
* the bundle on which the packet was received, returns the VLAN to which the
* packet belongs.
*
* Both 'vid' and the return value are in the range 0...4095. */
static uint16_t
input_vid_to_vlan(const struct ofbundle *in_bundle, uint16_t vid)
{
switch (in_bundle->vlan_mode) {
case PORT_VLAN_ACCESS:
return in_bundle->vlan;
break;
case PORT_VLAN_TRUNK:
return vid;
case PORT_VLAN_NATIVE_UNTAGGED:
case PORT_VLAN_NATIVE_TAGGED:
return vid ? vid : in_bundle->vlan;
default:
NOT_REACHED();
}
}
/* Given 'vlan', the VLAN that a packet belongs to, and
* 'out_bundle', a bundle on which the packet is to be output, returns the VID
* that should be included in the 802.1Q header. (If the return value is 0,
* then the 802.1Q header should only be included in the packet if there is a
* nonzero PCP.)
*
* Both 'vlan' and the return value are in the range 0...4095. */
static uint16_t
output_vlan_to_vid(const struct ofbundle *out_bundle, uint16_t vlan)
{
switch (out_bundle->vlan_mode) {
case PORT_VLAN_ACCESS:
return 0;
case PORT_VLAN_TRUNK:
case PORT_VLAN_NATIVE_TAGGED:
return vlan;
case PORT_VLAN_NATIVE_UNTAGGED:
return vlan == out_bundle->vlan ? 0 : vlan;
default:
NOT_REACHED();
}
}
static bool
set_dst(struct action_xlate_ctx *ctx, struct dst *dst,
const struct ofbundle *in_bundle, const struct ofbundle *out_bundle)
{
uint16_t vlan;
vlan = input_vid_to_vlan(in_bundle, vlan_tci_to_vid(ctx->flow.vlan_tci));
dst->vid = output_vlan_to_vid(out_bundle, vlan);
dst->port = (!out_bundle->bond
? ofbundle_get_a_port(out_bundle)
: bond_choose_output_slave(out_bundle->bond, &ctx->flow,
dst->vid, &ctx->tags));
return dst->port != NULL;
}
static int
mirror_mask_ffs(mirror_mask_t mask)
{
BUILD_ASSERT_DECL(sizeof(unsigned int) >= sizeof(mask));
return ffs(mask);
}
static void
dst_set_init(struct dst_set *set)
{
set->dsts = set->builtin;
set->n = 0;
set->allocated = ARRAY_SIZE(set->builtin);
}
static void
dst_set_add(struct dst_set *set, const struct dst *dst)
{
if (set->n >= set->allocated) {
size_t new_allocated;
struct dst *new_dsts;
new_allocated = set->allocated * 2;
new_dsts = xmalloc(new_allocated * sizeof *new_dsts);
memcpy(new_dsts, set->dsts, set->n * sizeof *new_dsts);
dst_set_free(set);
set->dsts = new_dsts;
set->allocated = new_allocated;
}
set->dsts[set->n++] = *dst;
}
static void
dst_set_free(struct dst_set *set)
{
if (set->dsts != set->builtin) {
free(set->dsts);
}
}
static bool
dst_is_duplicate(const struct dst_set *set, const struct dst *test)
{
size_t i;
for (i = 0; i < set->n; i++) {
if (set->dsts[i].vid == test->vid
&& set->dsts[i].port == test->port) {
return true;
}
}
return false;
}
static bool
ofbundle_trunks_vlan(const struct ofbundle *bundle, uint16_t vlan)
{
return (bundle->vlan_mode != PORT_VLAN_ACCESS
&& (!bundle->trunks || bitmap_is_set(bundle->trunks, vlan)));
}
static bool
ofbundle_includes_vlan(const struct ofbundle *bundle, uint16_t vlan)
{
return vlan == bundle->vlan || ofbundle_trunks_vlan(bundle, vlan);
}
/* Returns an arbitrary interface within 'bundle'. */
static struct ofport_dpif *
ofbundle_get_a_port(const struct ofbundle *bundle)
{
return CONTAINER_OF(list_front(&bundle->ports),
struct ofport_dpif, bundle_node);
}
static void
compose_dsts(struct action_xlate_ctx *ctx, uint16_t vlan,
const struct ofbundle *in_bundle,
const struct ofbundle *out_bundle, struct dst_set *set)
{
struct dst dst;
if (out_bundle == OFBUNDLE_FLOOD) {
struct ofbundle *bundle;
HMAP_FOR_EACH (bundle, hmap_node, &ctx->ofproto->bundles) {
if (bundle != in_bundle
&& ofbundle_includes_vlan(bundle, vlan)
&& bundle->floodable
&& !bundle->mirror_out
&& set_dst(ctx, &dst, in_bundle, bundle)) {
dst_set_add(set, &dst);
}
}
ctx->nf_output_iface = NF_OUT_FLOOD;
} else if (out_bundle && set_dst(ctx, &dst, in_bundle, out_bundle)) {
dst_set_add(set, &dst);
ctx->nf_output_iface = dst.port->odp_port;
}
}
static bool
vlan_is_mirrored(const struct ofmirror *m, int vlan)
{
return !m->vlans || bitmap_is_set(m->vlans, vlan);
}
/* Returns true if a packet with Ethernet destination MAC 'dst' may be mirrored
* to a VLAN. In general most packets may be mirrored but we want to drop
* protocols that may confuse switches. */
static bool
eth_dst_may_rspan(const uint8_t dst[ETH_ADDR_LEN])
{
/* If you change this function's behavior, please update corresponding
* documentation in vswitch.xml at the same time. */
if (dst[0] != 0x01) {
/* All the currently banned MACs happen to start with 01 currently, so
* this is a quick way to eliminate most of the good ones. */
} else {
if (eth_addr_is_reserved(dst)) {
/* Drop STP, IEEE pause frames, and other reserved protocols
* (01-80-c2-00-00-0x). */
return false;
}
if (dst[0] == 0x01 && dst[1] == 0x00 && dst[2] == 0x0c) {
/* Cisco OUI. */
if ((dst[3] & 0xfe) == 0xcc &&
(dst[4] & 0xfe) == 0xcc &&
(dst[5] & 0xfe) == 0xcc) {
/* Drop the following protocols plus others following the same
pattern:
CDP, VTP, DTP, PAgP (01-00-0c-cc-cc-cc)
Spanning Tree PVSTP+ (01-00-0c-cc-cc-cd)
STP Uplink Fast (01-00-0c-cd-cd-cd) */
return false;
}
if (!(dst[3] | dst[4] | dst[5])) {
/* Drop Inter Switch Link packets (01-00-0c-00-00-00). */
return false;
}
}
}
return true;
}
static void
compose_mirror_dsts(struct action_xlate_ctx *ctx,
uint16_t vlan, const struct ofbundle *in_bundle,
struct dst_set *set)
{
struct ofproto_dpif *ofproto = ctx->ofproto;
mirror_mask_t mirrors;
uint16_t flow_vid;
size_t i;
mirrors = in_bundle->src_mirrors;
for (i = 0; i < set->n; i++) {
mirrors |= set->dsts[i].port->bundle->dst_mirrors;
}
if (!mirrors) {
return;
}
flow_vid = vlan_tci_to_vid(ctx->flow.vlan_tci);
while (mirrors) {
struct ofmirror *m = ofproto->mirrors[mirror_mask_ffs(mirrors) - 1];
if (vlan_is_mirrored(m, vlan)) {
struct dst dst;
if (m->out) {
if (set_dst(ctx, &dst, in_bundle, m->out)
&& !dst_is_duplicate(set, &dst)) {
dst_set_add(set, &dst);
}
} else if (eth_dst_may_rspan(ctx->flow.dl_dst)) {
struct ofbundle *bundle;
HMAP_FOR_EACH (bundle, hmap_node, &ofproto->bundles) {
if (ofbundle_includes_vlan(bundle, m->out_vlan)
&& set_dst(ctx, &dst, in_bundle, bundle))
{
/* set_dst() got dst->vid from the input packet's VLAN,
* not from m->out_vlan, so recompute it. */
dst.vid = output_vlan_to_vid(bundle, m->out_vlan);
if (dst_is_duplicate(set, &dst)) {
continue;
}
if (bundle == in_bundle && dst.vid == flow_vid) {
/* Don't send out input port on same VLAN. */
continue;
}
dst_set_add(set, &dst);
}
}
}
}
mirrors &= mirrors - 1;
}
}
static void
compose_actions(struct action_xlate_ctx *ctx, uint16_t vlan,
const struct ofbundle *in_bundle,
const struct ofbundle *out_bundle)
{
uint16_t initial_vid, cur_vid;
const struct dst *dst;
struct dst_set set;
dst_set_init(&set);
compose_dsts(ctx, vlan, in_bundle, out_bundle, &set);
compose_mirror_dsts(ctx, vlan, in_bundle, &set);
if (!set.n) {
dst_set_free(&set);
return;
}
/* Output all the packets we can without having to change the VLAN. */
commit_odp_actions(ctx);
initial_vid = vlan_tci_to_vid(ctx->flow.vlan_tci);
for (dst = set.dsts; dst < &set.dsts[set.n]; dst++) {
if (dst->vid != initial_vid) {
continue;
}
compose_output_action(ctx, dst->port->odp_port);
}
/* Then output the rest. */
cur_vid = initial_vid;
for (dst = set.dsts; dst < &set.dsts[set.n]; dst++) {
if (dst->vid == initial_vid) {
continue;
}
if (dst->vid != cur_vid) {
ovs_be16 tci;
tci = htons(dst->vid);
tci |= ctx->flow.vlan_tci & htons(VLAN_PCP_MASK);
if (tci) {
tci |= htons(VLAN_CFI);
}
commit_vlan_action(ctx, tci);
cur_vid = dst->vid;
}
compose_output_action(ctx, dst->port->odp_port);
}
dst_set_free(&set);
}
/* Returns the effective vlan of a packet, taking into account both the
* 802.1Q header and implicitly tagged ports. A value of 0 indicates that
* the packet is untagged and -1 indicates it has an invalid header and
* should be dropped. */
static int
flow_get_vlan(struct ofproto_dpif *ofproto, const struct flow *flow,
struct ofbundle *in_bundle, bool have_packet)
{
int vlan = vlan_tci_to_vid(flow->vlan_tci);
if (vlan) {
if (in_bundle->vlan_mode == PORT_VLAN_ACCESS) {
/* Drop tagged packet on access port */
if (have_packet) {
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
VLOG_WARN_RL(&rl, "bridge %s: dropping VLAN %d tagged "
"packet received on port %s configured with "
"implicit VLAN %"PRIu16,
ofproto->up.name, vlan,
in_bundle->name, in_bundle->vlan);
}
return -1;
} else if (ofbundle_includes_vlan(in_bundle, vlan)) {
return vlan;
} else {
/* Drop packets from a VLAN not member of the trunk */
if (have_packet) {
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
VLOG_WARN_RL(&rl, "bridge %s: dropping VLAN %d tagged "
"packet received on port %s not configured for "
"trunking VLAN %d",
ofproto->up.name, vlan, in_bundle->name, vlan);
}
return -1;
}
} else {
if (in_bundle->vlan_mode != PORT_VLAN_TRUNK) {
return in_bundle->vlan;
} else {
return ofbundle_includes_vlan(in_bundle, 0) ? 0 : -1;
}
}
}
/* A VM broadcasts a gratuitous ARP to indicate that it has resumed after
* migration. Older Citrix-patched Linux DomU used gratuitous ARP replies to
* indicate this; newer upstream kernels use gratuitous ARP requests. */
static bool
is_gratuitous_arp(const struct flow *flow)
{
return (flow->dl_type == htons(ETH_TYPE_ARP)
&& eth_addr_is_broadcast(flow->dl_dst)
&& (flow->nw_proto == ARP_OP_REPLY
|| (flow->nw_proto == ARP_OP_REQUEST
&& flow->nw_src == flow->nw_dst)));
}
static void
update_learning_table(struct ofproto_dpif *ofproto,
const struct flow *flow, int vlan,
struct ofbundle *in_bundle)
{
struct mac_entry *mac;
if (!mac_learning_may_learn(ofproto->ml, flow->dl_src, vlan)) {
return;
}
mac = mac_learning_insert(ofproto->ml, flow->dl_src, vlan);
if (is_gratuitous_arp(flow)) {
/* We don't want to learn from gratuitous ARP packets that are
* reflected back over bond slaves so we lock the learning table. */
if (!in_bundle->bond) {
mac_entry_set_grat_arp_lock(mac);
} else if (mac_entry_is_grat_arp_locked(mac)) {
return;
}
}
if (mac_entry_is_new(mac) || mac->port.p != in_bundle) {
/* The log messages here could actually be useful in debugging,
* so keep the rate limit relatively high. */
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30, 300);
VLOG_DBG_RL(&rl, "bridge %s: learned that "ETH_ADDR_FMT" is "
"on port %s in VLAN %d",
ofproto->up.name, ETH_ADDR_ARGS(flow->dl_src),
in_bundle->name, vlan);
mac->port.p = in_bundle;
tag_set_add(&ofproto->revalidate_set,
mac_learning_changed(ofproto->ml, mac));
}
}
/* Determines whether packets in 'flow' within 'br' should be forwarded or
* dropped. Returns true if they may be forwarded, false if they should be
* dropped.
*
* If 'have_packet' is true, it indicates that the caller is processing a
* received packet. If 'have_packet' is false, then the caller is just
* revalidating an existing flow because configuration has changed. Either
* way, 'have_packet' only affects logging (there is no point in logging errors
* during revalidation).
*
* Sets '*in_portp' to the input port. This will be a null pointer if
* flow->in_port does not designate a known input port (in which case
* is_admissible() returns false).
*
* When returning true, sets '*vlanp' to the effective VLAN of the input
* packet, as returned by flow_get_vlan().
*
* May also add tags to '*tags', although the current implementation only does
* so in one special case.
*/
static bool
is_admissible(struct ofproto_dpif *ofproto, const struct flow *flow,
bool have_packet,
tag_type *tags, int *vlanp, struct ofbundle **in_bundlep)
{
struct ofport_dpif *in_port;
struct ofbundle *in_bundle;
int vlan;
/* Find the port and bundle for the received packet. */
in_port = get_ofp_port(ofproto, flow->in_port);
*in_bundlep = in_bundle = in_port ? in_port->bundle : NULL;
if (!in_port || !in_bundle) {
/* No interface? Something fishy... */
if (have_packet) {
/* Odd. A few possible reasons here:
*
* - We deleted a port but there are still a few packets queued up
* from it.
*
* - Someone externally added a port (e.g. "ovs-dpctl add-if") that
* we don't know about.
*
* - Packet arrived on the local port but the local port is not
* part of a bundle.
*/
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
VLOG_WARN_RL(&rl, "bridge %s: received packet on unknown "
"port %"PRIu16,
ofproto->up.name, flow->in_port);
}
*vlanp = -1;
return false;
}
*vlanp = vlan = flow_get_vlan(ofproto, flow, in_bundle, have_packet);
if (vlan < 0) {
return false;
}
/* Drop frames for reserved multicast addresses only if forward_bpdu
* option is absent. */
if (eth_addr_is_reserved(flow->dl_dst) && !ofproto->up.forward_bpdu) {
return false;
}
/* Drop frames on bundles reserved for mirroring. */
if (in_bundle->mirror_out) {
if (have_packet) {
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port "
"%s, which is reserved exclusively for mirroring",
ofproto->up.name, in_bundle->name);
}
return false;
}
if (in_bundle->bond) {
struct mac_entry *mac;
switch (bond_check_admissibility(in_bundle->bond, in_port,
flow->dl_dst, tags)) {
case BV_ACCEPT:
break;
case BV_DROP:
return false;
case BV_DROP_IF_MOVED:
mac = mac_learning_lookup(ofproto->ml, flow->dl_src, vlan, NULL);
if (mac && mac->port.p != in_bundle &&
(!is_gratuitous_arp(flow)
|| mac_entry_is_grat_arp_locked(mac))) {
return false;
}
break;
}
}
return true;
}
static void
xlate_normal(struct action_xlate_ctx *ctx)
{
struct ofbundle *in_bundle;
struct ofbundle *out_bundle;
struct mac_entry *mac;
int vlan;
ctx->has_normal = true;
/* Check whether we should drop packets in this flow. */
if (!is_admissible(ctx->ofproto, &ctx->flow, ctx->packet != NULL,
&ctx->tags, &vlan, &in_bundle)) {
out_bundle = NULL;
goto done;
}
/* Learn source MAC. */
if (ctx->may_learn) {
update_learning_table(ctx->ofproto, &ctx->flow, vlan, in_bundle);
}
/* Determine output bundle. */
mac = mac_learning_lookup(ctx->ofproto->ml, ctx->flow.dl_dst, vlan,
&ctx->tags);
if (mac) {
out_bundle = mac->port.p;
} else if (!ctx->packet && !eth_addr_is_multicast(ctx->flow.dl_dst)) {
/* If we are revalidating but don't have a learning entry then eject
* the flow. Installing a flow that floods packets opens up a window
* of time where we could learn from a packet reflected on a bond and
* blackhole packets before the learning table is updated to reflect
* the correct port. */
ctx->may_set_up_flow = false;
return;
} else {
out_bundle = OFBUNDLE_FLOOD;
}
/* Don't send packets out their input bundles. */
if (in_bundle == out_bundle) {
out_bundle = NULL;
}
done:
if (in_bundle) {
compose_actions(ctx, vlan, in_bundle, out_bundle);
}
}
/* Optimized flow revalidation.
*
* It's a difficult problem, in general, to tell which facets need to have
* their actions recalculated whenever the OpenFlow flow table changes. We
* don't try to solve that general problem: for most kinds of OpenFlow flow
* table changes, we recalculate the actions for every facet. This is
* relatively expensive, but it's good enough if the OpenFlow flow table
* doesn't change very often.
*
* However, we can expect one particular kind of OpenFlow flow table change to
* happen frequently: changes caused by MAC learning. To avoid wasting a lot
* of CPU on revalidating every facet whenever MAC learning modifies the flow
* table, we add a special case that applies to flow tables in which every rule
* has the same form (that is, the same wildcards), except that the table is
* also allowed to have a single "catch-all" flow that matches all packets. We
* optimize this case by tagging all of the facets that resubmit into the table
* and invalidating the same tag whenever a flow changes in that table. The
* end result is that we revalidate just the facets that need it (and sometimes
* a few more, but not all of the facets or even all of the facets that
* resubmit to the table modified by MAC learning). */
/* Calculates the tag to use for 'flow' and wildcards 'wc' when it is inserted
* into an OpenFlow table with the given 'basis'. */
static uint32_t
rule_calculate_tag(const struct flow *flow, const struct flow_wildcards *wc,
uint32_t secret)
{
if (flow_wildcards_is_catchall(wc)) {
return 0;
} else {
struct flow tag_flow = *flow;
flow_zero_wildcards(&tag_flow, wc);
return tag_create_deterministic(flow_hash(&tag_flow, secret));
}
}
/* Following a change to OpenFlow table 'table_id' in 'ofproto', update the
* taggability of that table.
*
* This function must be called after *each* change to a flow table. If you
* skip calling it on some changes then the pointer comparisons at the end can
* be invalid if you get unlucky. For example, if a flow removal causes a
* cls_table to be destroyed and then a flow insertion causes a cls_table with
* different wildcards to be created with the same address, then this function
* will incorrectly skip revalidation. */
static void
table_update_taggable(struct ofproto_dpif *ofproto, uint8_t table_id)
{
struct table_dpif *table = &ofproto->tables[table_id];
const struct classifier *cls = &ofproto->up.tables[table_id];
struct cls_table *catchall, *other;
struct cls_table *t;
catchall = other = NULL;
switch (hmap_count(&cls->tables)) {
case 0:
/* We could tag this OpenFlow table but it would make the logic a
* little harder and it's a corner case that doesn't seem worth it
* yet. */
break;
case 1:
case 2:
HMAP_FOR_EACH (t, hmap_node, &cls->tables) {
if (cls_table_is_catchall(t)) {
catchall = t;
} else if (!other) {
other = t;
} else {
/* Indicate that we can't tag this by setting both tables to
* NULL. (We know that 'catchall' is already NULL.) */
other = NULL;
}
}
break;
default:
/* Can't tag this table. */
break;
}
if (table->catchall_table != catchall || table->other_table != other) {
table->catchall_table = catchall;
table->other_table = other;
ofproto->need_revalidate = true;
}
}
/* Given 'rule' that has changed in some way (either it is a rule being
* inserted, a rule being deleted, or a rule whose actions are being
* modified), marks facets for revalidation to ensure that packets will be
* forwarded correctly according to the new state of the flow table.
*
* This function must be called after *each* change to a flow table. See
* the comment on table_update_taggable() for more information. */
static void
rule_invalidate(const struct rule_dpif *rule)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(rule->up.ofproto);
table_update_taggable(ofproto, rule->up.table_id);
if (!ofproto->need_revalidate) {
struct table_dpif *table = &ofproto->tables[rule->up.table_id];
if (table->other_table && rule->tag) {
tag_set_add(&ofproto->revalidate_set, rule->tag);
} else {
ofproto->need_revalidate = true;
}
}
}
static bool
set_frag_handling(struct ofproto *ofproto_,
enum ofp_config_flags frag_handling)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
if (frag_handling != OFPC_FRAG_REASM) {
ofproto->need_revalidate = true;
return true;
} else {
return false;
}
}
static int
packet_out(struct ofproto *ofproto_, struct ofpbuf *packet,
const struct flow *flow,
const union ofp_action *ofp_actions, size_t n_ofp_actions)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
int error;
if (flow->in_port >= ofproto->max_ports && flow->in_port < OFPP_MAX) {
return ofp_mkerr_nicira(OFPET_BAD_REQUEST, NXBRC_BAD_IN_PORT);
}
error = validate_actions(ofp_actions, n_ofp_actions, flow,
ofproto->max_ports);
if (!error) {
struct odputil_keybuf keybuf;
struct action_xlate_ctx ctx;
struct ofpbuf *odp_actions;
struct ofpbuf key;
ofpbuf_use_stack(&key, &keybuf, sizeof keybuf);
odp_flow_key_from_flow(&key, flow);
action_xlate_ctx_init(&ctx, ofproto, flow, packet);
odp_actions = xlate_actions(&ctx, ofp_actions, n_ofp_actions);
dpif_execute(ofproto->dpif, key.data, key.size,
odp_actions->data, odp_actions->size, packet);
ofpbuf_delete(odp_actions);
}
return error;
}
static void
get_netflow_ids(const struct ofproto *ofproto_,
uint8_t *engine_type, uint8_t *engine_id)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
dpif_get_netflow_ids(ofproto->dpif, engine_type, engine_id);
}
static struct ofproto_dpif *
ofproto_dpif_lookup(const char *name)
{
struct ofproto *ofproto = ofproto_lookup(name);
return (ofproto && ofproto->ofproto_class == &ofproto_dpif_class
? ofproto_dpif_cast(ofproto)
: NULL);
}
static void
ofproto_unixctl_fdb_flush(struct unixctl_conn *conn,
const char *args, void *aux OVS_UNUSED)
{
const struct ofproto_dpif *ofproto;
ofproto = ofproto_dpif_lookup(args);
if (!ofproto) {
unixctl_command_reply(conn, 501, "no such bridge");
return;
}
mac_learning_flush(ofproto->ml);
unixctl_command_reply(conn, 200, "table successfully flushed");
}
static void
ofproto_unixctl_fdb_show(struct unixctl_conn *conn,
const char *args, void *aux OVS_UNUSED)
{
struct ds ds = DS_EMPTY_INITIALIZER;
const struct ofproto_dpif *ofproto;
const struct mac_entry *e;
ofproto = ofproto_dpif_lookup(args);
if (!ofproto) {
unixctl_command_reply(conn, 501, "no such bridge");
return;
}
ds_put_cstr(&ds, " port VLAN MAC Age\n");
LIST_FOR_EACH (e, lru_node, &ofproto->ml->lrus) {
struct ofbundle *bundle = e->port.p;
ds_put_format(&ds, "%5d %4d "ETH_ADDR_FMT" %3d\n",
ofbundle_get_a_port(bundle)->odp_port,
e->vlan, ETH_ADDR_ARGS(e->mac), mac_entry_age(e));
}
unixctl_command_reply(conn, 200, ds_cstr(&ds));
ds_destroy(&ds);
}
struct ofproto_trace {
struct action_xlate_ctx ctx;
struct flow flow;
struct ds *result;
};
static void
trace_format_rule(struct ds *result, uint8_t table_id, int level,
const struct rule_dpif *rule)
{
ds_put_char_multiple(result, '\t', level);
if (!rule) {
ds_put_cstr(result, "No match\n");
return;
}
ds_put_format(result, "Rule: table=%"PRIu8" cookie=%#"PRIx64" ",
table_id, ntohll(rule->up.flow_cookie));
cls_rule_format(&rule->up.cr, result);
ds_put_char(result, '\n');
ds_put_char_multiple(result, '\t', level);
ds_put_cstr(result, "OpenFlow ");
ofp_print_actions(result, rule->up.actions, rule->up.n_actions);
ds_put_char(result, '\n');
}
static void
trace_format_flow(struct ds *result, int level, const char *title,
struct ofproto_trace *trace)
{
ds_put_char_multiple(result, '\t', level);
ds_put_format(result, "%s: ", title);
if (flow_equal(&trace->ctx.flow, &trace->flow)) {
ds_put_cstr(result, "unchanged");
} else {
flow_format(result, &trace->ctx.flow);
trace->flow = trace->ctx.flow;
}
ds_put_char(result, '\n');
}
static void
trace_format_regs(struct ds *result, int level, const char *title,
struct ofproto_trace *trace)
{
size_t i;
ds_put_char_multiple(result, '\t', level);
ds_put_format(result, "%s:", title);
for (i = 0; i < FLOW_N_REGS; i++) {
ds_put_format(result, " reg%zu=0x%"PRIx32, i, trace->flow.regs[i]);
}
ds_put_char(result, '\n');
}
static void
trace_resubmit(struct action_xlate_ctx *ctx, struct rule_dpif *rule)
{
struct ofproto_trace *trace = CONTAINER_OF(ctx, struct ofproto_trace, ctx);
struct ds *result = trace->result;
ds_put_char(result, '\n');
trace_format_flow(result, ctx->recurse + 1, "Resubmitted flow", trace);
trace_format_regs(result, ctx->recurse + 1, "Resubmitted regs", trace);
trace_format_rule(result, ctx->table_id, ctx->recurse + 1, rule);
}
static void
ofproto_unixctl_trace(struct unixctl_conn *conn, const char *args_,
void *aux OVS_UNUSED)
{
char *dpname, *arg1, *arg2, *arg3, *arg4;
char *args = xstrdup(args_);
char *save_ptr = NULL;
struct ofproto_dpif *ofproto;
struct ofpbuf odp_key;
struct ofpbuf *packet;
struct rule_dpif *rule;
struct ds result;
struct flow flow;
char *s;
packet = NULL;
ofpbuf_init(&odp_key, 0);
ds_init(&result);
dpname = strtok_r(args, " ", &save_ptr);
arg1 = strtok_r(NULL, " ", &save_ptr);
arg2 = strtok_r(NULL, " ", &save_ptr);
arg3 = strtok_r(NULL, " ", &save_ptr);
arg4 = strtok_r(NULL, "", &save_ptr); /* Get entire rest of line. */
if (dpname && arg1 && (!arg2 || !strcmp(arg2, "-generate")) && !arg3) {
/* ofproto/trace dpname flow [-generate] */
int error;
/* Convert string to datapath key. */
ofpbuf_init(&odp_key, 0);
error = odp_flow_key_from_string(arg1, &odp_key);
if (error) {
unixctl_command_reply(conn, 501, "Bad flow syntax");
goto exit;
}
/* Convert odp_key to flow. */
error = odp_flow_key_to_flow(odp_key.data, odp_key.size, &flow);
if (error) {
unixctl_command_reply(conn, 501, "Invalid flow");
goto exit;
}
/* Generate a packet, if requested. */
if (arg2) {
packet = ofpbuf_new(0);
flow_compose(packet, &flow);
}
} else if (dpname && arg1 && arg2 && arg3 && arg4) {
/* ofproto/trace dpname priority tun_id in_port packet */
uint16_t in_port;
ovs_be64 tun_id;
uint32_t priority;
priority = atoi(arg1);
tun_id = htonll(strtoull(arg2, NULL, 0));
in_port = ofp_port_to_odp_port(atoi(arg3));
packet = ofpbuf_new(strlen(args) / 2);
arg4 = ofpbuf_put_hex(packet, arg4, NULL);
arg4 += strspn(arg4, " ");
if (*arg4 != '\0') {
unixctl_command_reply(conn, 501, "Trailing garbage in command");
goto exit;
}
if (packet->size < ETH_HEADER_LEN) {
unixctl_command_reply(conn, 501,
"Packet data too short for Ethernet");
goto exit;
}
ds_put_cstr(&result, "Packet: ");
s = ofp_packet_to_string(packet->data, packet->size, packet->size);
ds_put_cstr(&result, s);
free(s);
flow_extract(packet, priority, tun_id, in_port, &flow);
} else {
unixctl_command_reply(conn, 501, "Bad command syntax");
goto exit;
}
ofproto = ofproto_dpif_lookup(dpname);
if (!ofproto) {
unixctl_command_reply(conn, 501, "Unknown ofproto (use ofproto/list "
"for help)");
goto exit;
}
ds_put_cstr(&result, "Flow: ");
flow_format(&result, &flow);
ds_put_char(&result, '\n');
rule = rule_dpif_lookup(ofproto, &flow, 0);
trace_format_rule(&result, 0, 0, rule);
if (rule) {
struct ofproto_trace trace;
struct ofpbuf *odp_actions;
trace.result = &result;
trace.flow = flow;
action_xlate_ctx_init(&trace.ctx, ofproto, &flow, packet);
trace.ctx.resubmit_hook = trace_resubmit;
odp_actions = xlate_actions(&trace.ctx,
rule->up.actions, rule->up.n_actions);
ds_put_char(&result, '\n');
trace_format_flow(&result, 0, "Final flow", &trace);
ds_put_cstr(&result, "Datapath actions: ");
format_odp_actions(&result, odp_actions->data, odp_actions->size);
ofpbuf_delete(odp_actions);
if (!trace.ctx.may_set_up_flow) {
if (packet) {
ds_put_cstr(&result, "\nThis flow is not cachable.");
} else {
ds_put_cstr(&result, "\nThe datapath actions are incomplete--"
"for complete actions, please supply a packet.");
}
}
}
unixctl_command_reply(conn, 200, ds_cstr(&result));
exit:
ds_destroy(&result);
ofpbuf_delete(packet);
ofpbuf_uninit(&odp_key);
free(args);
}
static void
ofproto_dpif_clog(struct unixctl_conn *conn OVS_UNUSED,
const char *args_ OVS_UNUSED, void *aux OVS_UNUSED)
{
clogged = true;
unixctl_command_reply(conn, 200, NULL);
}
static void
ofproto_dpif_unclog(struct unixctl_conn *conn OVS_UNUSED,
const char *args_ OVS_UNUSED, void *aux OVS_UNUSED)
{
clogged = false;
unixctl_command_reply(conn, 200, NULL);
}
static void
ofproto_dpif_unixctl_init(void)
{
static bool registered;
if (registered) {
return;
}
registered = true;
unixctl_command_register("ofproto/trace",
"bridge {tun_id in_port packet | odp_flow [-generate]}",
ofproto_unixctl_trace, NULL);
unixctl_command_register("fdb/flush", "bridge", ofproto_unixctl_fdb_flush,
NULL);
unixctl_command_register("fdb/show", "bridge", ofproto_unixctl_fdb_show,
NULL);
unixctl_command_register("ofproto/clog", "", ofproto_dpif_clog, NULL);
unixctl_command_register("ofproto/unclog", "", ofproto_dpif_unclog, NULL);
}
const struct ofproto_class ofproto_dpif_class = {
enumerate_types,
enumerate_names,
del,
alloc,
construct,
destruct,
dealloc,
run,
wait,
flush,
get_features,
get_tables,
port_alloc,
port_construct,
port_destruct,
port_dealloc,
port_modified,
port_reconfigured,
port_query_by_name,
port_add,
port_del,
port_dump_start,
port_dump_next,
port_dump_done,
port_poll,
port_poll_wait,
port_is_lacp_current,
NULL, /* rule_choose_table */
rule_alloc,
rule_construct,
rule_destruct,
rule_dealloc,
rule_get_stats,
rule_execute,
rule_modify_actions,
set_frag_handling,
packet_out,
set_netflow,
get_netflow_ids,
set_sflow,
set_cfm,
get_cfm_fault,
get_cfm_remote_mpids,
set_stp,
get_stp_status,
set_stp_port,
get_stp_port_status,
bundle_set,
bundle_remove,
mirror_set,
set_flood_vlans,
is_mirror_output_bundle,
forward_bpdu_changed,
};
Reference in New Issue View Git Blame Copy Permalink