mir/ovs
2
0
Fork 0
mirror of https://github.com/openvswitch/ovs synced 2025-08-22 01:51:26 +00:00
Code Issues Releases Wiki Activity
ovs/lib/ovs-lldp.c
Ben Pfaff b2befd5bb2 sparse: Add guards to prevent FreeBSD-incompatible #include order. 
FreeBSD insists that <sys/types.h> be included before <netinet/in.h> and
that <netinet/in.h> be included before <arpa/inet.h>.  This adds guards to
the "sparse" headers to yield a warning if this order is violated.  This
commit also adjusts the order of many #includes to suit this requirement.

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

987 lines
28 KiB
C
Raw Blame History

/*
* Copyright (c) 2015 Nicira, Inc.
* Copyright (c) 2014 WindRiver, Inc.
* Copyright (c) 2015 Avaya, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* Implementation of Auto Attach.
* Based on sample implementation in 802.1ab. Above copyright and license
* applies to all modifications.
* Limitations:
* - No support for multiple bridge.
* - Auto Attach state machine not implemented.
* - Auto Attach and LLDP code are bundled together. The plan is to decoupled
* them.
*/
#include <config.h>
#include "ovs-lldp.h"
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <inttypes.h>
#include <stdbool.h>
#include <stdlib.h>
#include "openvswitch/dynamic-string.h"
#include "flow.h"
#include "openvswitch/list.h"
#include "lldp/lldpd.h"
#include "lldp/lldpd-structs.h"
#include "netdev.h"
#include "openvswitch/types.h"
#include "packets.h"
#include "openvswitch/poll-loop.h"
#include "smap.h"
#include "unixctl.h"
#include "util.h"
#include "openvswitch/vlog.h"
VLOG_DEFINE_THIS_MODULE(ovs_lldp);
#define LLDP_PROTOCOL_ID 0x0000
#define LLDP_PROTOCOL_VERSION 0x00
#define LLDP_TYPE_CONFIG 0x00
#define LLDP_CHASSIS_TTL 120
#define ETH_TYPE_LLDP 0x88cc
#define MINIMUM_ETH_PACKET_SIZE 68
#define AA_STATUS_MULTIPLE \
AA_STATUS(ACTIVE,2,Active) \
AA_STATUS(REJECT_GENERIC,3,Reject (Generic)) \
AA_STATUS(REJECT_AA_RES_NOTAVAIL,4,Reject (AA resources unavailable)) \
AA_STATUS(REJECT_INVALID,6,Reject (Invalid)) \
AA_STATUS(REJECT_VLAN_RES_UNAVAIL,8,Reject (VLAN resources unavailable)) \
AA_STATUS(REJECT_VLAN_APP_ISSUE,9,Reject (Application interaction issue)) \
AA_STATUS(PENDING,255,Pending)
enum aa_status {
#define AA_STATUS(NAME, VALUE, STR) AA_STATUS_##NAME = VALUE,
AA_STATUS_MULTIPLE
#undef AA_STATUS
AA_STATUS_N_MULTIPLE
};
/* Internal structure for an Auto Attach mapping.
*/
struct aa_mapping_internal {
struct hmap_node hmap_node_isid;
struct hmap_node hmap_node_aux;
uint32_t isid;
uint16_t vlan;
void *aux;
enum aa_status status;
};
static struct ovs_mutex mutex = OVS_MUTEX_INITIALIZER;
/* Hash map of all LLDP instances keyed by name (port at the moment).
*/
static struct hmap all_lldps__ = HMAP_INITIALIZER(&all_lldps__);
static struct hmap *const all_lldps OVS_GUARDED_BY(mutex) = &all_lldps__;
/* Hash map of all the Auto Attach mappings. Global at the moment (but will
* be per bridge). Used when adding a new port to a bridge so that we can
* properly install all the configured mapping on the port and export them
* To the Auto Attach server via LLDP.
*/
static struct hmap all_mappings__ = HMAP_INITIALIZER(&all_mappings__);
static struct hmap *const all_mappings OVS_GUARDED_BY(mutex) = &all_mappings__;
static struct lldp_aa_element_system_id system_id_null;
/* Convert an LLDP chassis ID to a string.
*/
static void
chassisid_to_string(uint8_t *array, size_t len, char **str)
{
unsigned int i;
*str = xmalloc(len * 3);
for (i = 0; i < len; i++) {
snprintf(&(*str)[i * 3], 4, "%02x:", array[i]);
}
(*str)[(i * 3) - 1] = '\0';
}
/* Find an Auto Attach mapping keyed by I-SID.
*/
static struct aa_mapping_internal *
mapping_find_by_isid(struct lldp *lldp, uint32_t isid)
OVS_REQUIRES(mutex)
{
struct aa_mapping_internal *m;
HMAP_FOR_EACH_IN_BUCKET (m, hmap_node_isid, hash_int(isid, 0),
&lldp->mappings_by_isid) {
if (isid == m->isid) {
return m;
}
}
return NULL;
}
/* Find an Auto Attach mapping keyed by aux. aux is an opaque pointer created
* by the bridge that refers to an OVSDB mapping record.
*/
static struct aa_mapping_internal *
mapping_find_by_aux(struct lldp *lldp, const void *aux) OVS_REQUIRES(mutex)
{
struct aa_mapping_internal *m;
HMAP_FOR_EACH_IN_BUCKET (m, hmap_node_aux, hash_pointer(aux, 0),
&lldp->mappings_by_aux) {
if (aux == m->aux) {
return m;
}
}
return NULL;
}
/* Convert an Auto Attach request status to a string.
*/
static char *
aa_status_to_str(uint8_t status)
{
switch (status) {
#define AA_STATUS(NAME, VALUE, STR) case AA_STATUS_##NAME: return #STR;
AA_STATUS_MULTIPLE
#undef AA_STATUS
default: return "Undefined";
}
}
/* Display LLDP and Auto Attach statistics.
*/
static void
aa_print_lldp_and_aa_stats(struct ds *ds, struct lldp *lldp)
OVS_REQUIRES(mutex)
{
struct lldpd_hardware *hw;
ds_put_format(ds, "Statistics: %s\n", lldp->name);
if (!lldp->lldpd) {
return;
}
LIST_FOR_EACH (hw, h_entries, &lldp->lldpd->g_hardware) {
ds_put_format(ds, "\ttx cnt: %"PRIu64"\n", hw->h_tx_cnt);
ds_put_format(ds, "\trx cnt: %"PRIu64"\n", hw->h_rx_cnt);
ds_put_format(ds, "\trx discarded cnt: %"PRIu64"\n",
hw->h_rx_discarded_cnt);
ds_put_format(ds, "\trx unrecognized cnt: %"PRIu64"\n",
hw->h_rx_unrecognized_cnt);
ds_put_format(ds, "\tageout cnt: %"PRIu64"\n", hw->h_ageout_cnt);
ds_put_format(ds, "\tinsert cnt: %"PRIu64"\n", hw->h_insert_cnt);
ds_put_format(ds, "\tdelete cnt: %"PRIu64"\n", hw->h_delete_cnt);
ds_put_format(ds, "\tdrop cnt: %"PRIu64"\n", hw->h_drop_cnt);
}
}
static void
aa_print_element_status_port(struct ds *ds, struct lldpd_hardware *hw)
{
struct lldpd_port *port;
LIST_FOR_EACH (port, p_entries, &hw->h_rports) {
if (memcmp(&port->p_element.system_id,
&system_id_null,
sizeof port->p_element.system_id)) {
const char *none_str = "<None>";
const char *descr = NULL;
char *id = NULL;
char *system;
if (port->p_chassis) {
if (port->p_chassis->c_id_len > 0) {
chassisid_to_string(port->p_chassis->c_id,
port->p_chassis->c_id_len, &id);
}
descr = port->p_chassis->c_descr;
}
chassisid_to_string((uint8_t *) &port->p_element.system_id,
sizeof port->p_element.system_id, &system);
ds_put_format(ds, "\tAuto Attach Primary Server Id: %s\n",
id ? id : none_str);
ds_put_format(ds, "\tAuto Attach Primary Server Descr: %s\n",
descr ? descr : none_str);
ds_put_format(ds, "\tAuto Attach Primary Server System Id: %s\n",
system);
free(id);
free(system);
}
}
}
/* Auto Attach server broadcast an LLDP message periodically. Display
* the discovered server.
*/
static void
aa_print_element_status(struct ds *ds, struct lldp *lldp) OVS_REQUIRES(mutex)
{
struct lldpd_hardware *hw;
ds_put_format(ds, "LLDP: %s\n", lldp->name);
if (!lldp->lldpd) {
return;
}
LIST_FOR_EACH (hw, h_entries, &lldp->lldpd->g_hardware) {
aa_print_element_status_port(ds, hw);
}
}
static void
aa_print_isid_status_port_isid(struct lldp *lldp, struct lldpd_port *port)
OVS_REQUIRES(mutex)
{
struct lldpd_aa_isid_vlan_maps_tlv *mapping;
if (ovs_list_is_empty(&port->p_isid_vlan_maps)) {
return;
}
LIST_FOR_EACH (mapping, m_entries, &port->p_isid_vlan_maps) {
uint32_t isid = mapping->isid_vlan_data.isid;
struct aa_mapping_internal *m = mapping_find_by_isid(lldp, isid);
VLOG_INFO("h_rport: isid=%u, vlan=%u, status=%d",
isid,
mapping->isid_vlan_data.vlan,
mapping->isid_vlan_data.status);
/* Update the status of our internal state for the mapping. */
if (m) {
VLOG_INFO("Setting status for ISID=%"PRIu32" to %"PRIu16,
isid, mapping->isid_vlan_data.status);
m->status = mapping->isid_vlan_data.status;
} else {
VLOG_WARN("Couldn't find mapping for I-SID=%"PRIu32, isid);
}
}
}
static void
aa_print_isid_status_port(struct lldp *lldp, struct lldpd_hardware *hw)
OVS_REQUIRES(mutex)
{
struct lldpd_port *port;
LIST_FOR_EACH (port, p_entries, &hw->h_rports) {
aa_print_isid_status_port_isid(lldp, port);
}
}
/* The Auto Attach server will broadcast the status of the configured mappings
* via LLDP. Display the status.
*/
static void
aa_print_isid_status(struct ds *ds, struct lldp *lldp) OVS_REQUIRES(mutex)
{
struct lldpd_hardware *hw;
struct aa_mapping_internal *m;
if (!lldp->lldpd) {
return;
}
ds_put_format(ds, "LLDP: %s\n", lldp->name);
LIST_FOR_EACH (hw, h_entries, &lldp->lldpd->g_hardware) {
aa_print_isid_status_port(lldp, hw);
}
ds_put_format(ds, "%-8s %-4s %-11s %-8s\n",
"I-SID",
"VLAN",
"Source",
"Status");
ds_put_format(ds, "-------- ---- ----------- --------\n");
HMAP_FOR_EACH (m, hmap_node_isid, &lldp->mappings_by_isid) {
ds_put_format(ds, "%-8"PRIu32" %-4"PRIu16" %-11s %-11s\n",
m->isid, m->vlan, "Switch", aa_status_to_str(m->status));
}
}
static void
aa_unixctl_status(struct unixctl_conn *conn, int argc OVS_UNUSED,
const char *argv[] OVS_UNUSED, void *aux OVS_UNUSED)
OVS_EXCLUDED(mutex)
{
struct lldp *lldp;
struct ds ds = DS_EMPTY_INITIALIZER;
ovs_mutex_lock(&mutex);
HMAP_FOR_EACH (lldp, hmap_node, all_lldps) {
aa_print_element_status(&ds, lldp);
}
unixctl_command_reply(conn, ds_cstr(&ds));
ds_destroy(&ds);
ovs_mutex_unlock(&mutex);
}
static void
aa_unixctl_show_isid(struct unixctl_conn *conn, int argc OVS_UNUSED,
const char *argv[] OVS_UNUSED, void *aux OVS_UNUSED)
OVS_EXCLUDED(mutex)
{
struct lldp *lldp;
struct ds ds = DS_EMPTY_INITIALIZER;
ovs_mutex_lock(&mutex);
HMAP_FOR_EACH (lldp, hmap_node, all_lldps) {
aa_print_isid_status(&ds, lldp);
}
unixctl_command_reply(conn, ds_cstr(&ds));
ds_destroy(&ds);
ovs_mutex_unlock(&mutex);
}
static void
aa_unixctl_statistics(struct unixctl_conn *conn, int argc OVS_UNUSED,
const char *argv[] OVS_UNUSED, void *aux OVS_UNUSED)
OVS_EXCLUDED(mutex)
{
struct ds ds = DS_EMPTY_INITIALIZER;
struct lldp *lldp;
ovs_mutex_lock(&mutex);
/* Cycle through all ports and dump the stats for each one */
HMAP_FOR_EACH (lldp, hmap_node, all_lldps) {
aa_print_lldp_and_aa_stats(&ds, lldp);
}
ovs_mutex_unlock(&mutex);
unixctl_command_reply(conn, ds_cstr(&ds));
}
/* An Auto Attach mapping was configured. Populate the corresponding
* structures in the LLDP hardware.
*/
static void
update_mapping_on_lldp(struct lldp *lldp, struct lldpd_hardware *hardware,
struct aa_mapping_internal *m)
{
struct lldpd_aa_isid_vlan_maps_tlv *lm = xzalloc(sizeof *lm);
VLOG_INFO("\t\t hardware->h_ifname=%s", hardware->h_ifname);
lm->isid_vlan_data.isid = m->isid;
lm->isid_vlan_data.vlan = m->vlan;
ovs_list_push_back(&hardware->h_lport.p_isid_vlan_maps, &lm->m_entries);
/* TODO Should be done in the Auto Attach state machine when a mapping goes
* from "pending" to "active".
*/
struct bridge_aa_vlan *node = xmalloc(sizeof *node);
node->port_name = xstrdup(hardware->h_ifname);
node->vlan = m->vlan;
node->oper = BRIDGE_AA_VLAN_OPER_ADD;
ovs_list_push_back(&lldp->active_mapping_queue, &node->list_node);
}
/* Bridge will poll the list of VLAN that needs to be auto configure based on
* the Auto Attach mappings that have been exchanged with the server.
*/
int
aa_get_vlan_queued(struct ovs_list *list)
{
struct lldp *lldp;
ovs_mutex_lock(&mutex);
HMAP_FOR_EACH (lldp, hmap_node, all_lldps) {
struct bridge_aa_vlan *node;
LIST_FOR_EACH_POP (node, list_node, &lldp->active_mapping_queue) {
struct bridge_aa_vlan *copy;
copy = xmalloc(sizeof *copy);
copy->port_name = xstrdup(node->port_name);
copy->vlan = node->vlan;
copy->oper = node->oper;
ovs_list_push_back(list, &copy->list_node);
/* Cleanup */
free(node->port_name);
free(node);
}
}
ovs_mutex_unlock(&mutex);
return 0;
}
/* Bridge will poll whether or not VLAN have been auto-configured.
*/
unsigned int
aa_get_vlan_queue_size(void)
{
struct lldp *lldp;
unsigned int size = 0;
ovs_mutex_lock(&mutex);
HMAP_FOR_EACH (lldp, hmap_node, all_lldps) {
size += ovs_list_size(&lldp->active_mapping_queue);
}
ovs_mutex_unlock(&mutex);
return size;
}
/* Configure Auto Attach.
*/
int
aa_configure(const struct aa_settings *s)
{
struct lldp *lldp;
ovs_mutex_lock(&mutex);
/* TODO Change all instances for now */
HMAP_FOR_EACH (lldp, hmap_node, all_lldps) {
struct lldpd_chassis *chassis;
LIST_FOR_EACH (chassis, list, &lldp->lldpd->g_chassis) {
/* System Description */
free(chassis->c_descr);
chassis->c_descr = s && s->system_description[0] ?
xstrdup(s->system_description) : xstrdup(PACKAGE_STRING);
/* System Name */
if (s) {
free(chassis->c_name);
chassis->c_name = xstrdup(s->system_name);
}
}
}
ovs_mutex_unlock(&mutex);
return 0;
}
/* Add a new Auto Attach mapping.
*/
int
aa_mapping_register(void *aux, const struct aa_mapping_settings *s)
{
struct aa_mapping_internal *bridge_m;
struct lldp *lldp;
VLOG_INFO("Adding mapping ISID=%"PRIu32", VLAN=%"PRIu16", aux=%p",
s->isid, s->vlan, aux);
ovs_mutex_lock(&mutex);
/* TODO These mappings should be stores per bridge. This is used
* When a port is added. Auto Attach mappings need to be added on this
* port.
*/
bridge_m = xzalloc(sizeof *bridge_m);
bridge_m->isid = s->isid;
bridge_m->vlan = s->vlan;
bridge_m->aux = aux;
bridge_m->status = AA_STATUS_PENDING;
hmap_insert(all_mappings, &bridge_m->hmap_node_isid,
hash_int(bridge_m->isid, 0));
/* Update mapping on the all the LLDP instances. */
HMAP_FOR_EACH (lldp, hmap_node, all_lldps) {
struct lldpd_hardware *hw;
struct aa_mapping_internal *m;
VLOG_INFO("\t lldp->name=%s", lldp->name);
if (mapping_find_by_isid(lldp, s->isid)) {
continue;
}
m = xzalloc(sizeof *m);
m->isid = s->isid;
m->vlan = s->vlan;
m->status = AA_STATUS_PENDING;
m->aux = aux;
hmap_insert(&lldp->mappings_by_isid, &m->hmap_node_isid,
hash_int(m->isid, 0));
hmap_insert(&lldp->mappings_by_aux,
&m->hmap_node_aux,
hash_pointer(m->aux, 0));
/* Configure the mapping on each port of the LLDP stack. */
LIST_FOR_EACH (hw, h_entries, &lldp->lldpd->g_hardware) {
update_mapping_on_lldp(lldp, hw, m);
}
}
ovs_mutex_unlock(&mutex);
return 0;
}
static void
aa_mapping_unregister_mapping(struct lldp *lldp,
struct lldpd_hardware *hw,
struct aa_mapping_internal *m)
{
struct lldpd_aa_isid_vlan_maps_tlv *lm, *lm_next;
LIST_FOR_EACH_SAFE (lm, lm_next, m_entries,
&hw->h_lport.p_isid_vlan_maps) {
uint32_t isid = lm->isid_vlan_data.isid;
if (isid == m->isid) {
VLOG_INFO("\t\t Removing lport, isid=%u, vlan=%u",
isid,
lm->isid_vlan_data.vlan);
ovs_list_remove(&lm->m_entries);
/* TODO Should be done in the AA SM when a mapping goes
* from "pending" to "active".
*/
struct bridge_aa_vlan *node = xmalloc(sizeof *node);
node->port_name = xstrdup(hw->h_ifname);
node->vlan = m->vlan;
node->oper = BRIDGE_AA_VLAN_OPER_REMOVE;
ovs_list_push_back(&lldp->active_mapping_queue, &node->list_node);
break;
}
}
}
/* Remove an existing Auto Attach mapping.
*/
int
aa_mapping_unregister(void *aux)
{
struct lldp *lldp;
VLOG_INFO("Removing mapping aux=%p", aux);
ovs_mutex_lock(&mutex);
HMAP_FOR_EACH (lldp, hmap_node, all_lldps) {
struct lldpd_hardware *hw;
struct aa_mapping_internal *m = mapping_find_by_aux(lldp, aux);
/* Remove from internal hash tables. */
if (m) {
uint32_t isid = m->isid;
uint16_t vlan = m->vlan;
struct aa_mapping_internal *p = mapping_find_by_isid(lldp, isid);
VLOG_INFO("\t Removing mapping ISID=%"PRIu32", VLAN=%"PRIu16
" (lldp->name=%s)", isid, vlan, lldp->name);
if (p) {
hmap_remove(&lldp->mappings_by_isid, &p->hmap_node_isid);
}
hmap_remove(&lldp->mappings_by_aux, &m->hmap_node_aux);
/* Remove from all the lldp instances */
LIST_FOR_EACH (hw, h_entries, &lldp->lldpd->g_hardware) {
VLOG_INFO("\t\t hardware->h_ifname=%s", hw->h_ifname);
aa_mapping_unregister_mapping(lldp, hw, m);
}
free(m);
/* Remove from the all_mappings */
HMAP_FOR_EACH (m, hmap_node_isid, all_mappings) {
if (m && isid == m->isid && vlan == m->vlan) {
hmap_remove(all_mappings, &m->hmap_node_isid);
break;
}
}
}
}
ovs_mutex_unlock(&mutex);
return 0;
}
void
lldp_init(void)
{
unixctl_command_register("autoattach/status", "[bridge]", 0, 1,
aa_unixctl_status, NULL);
unixctl_command_register("autoattach/show-isid", "[bridge]", 0, 1,
aa_unixctl_show_isid, NULL);
unixctl_command_register("autoattach/statistics", "[bridge]", 0, 1,
aa_unixctl_statistics, NULL);
}
/* Returns true if 'lldp' should process packets from 'flow'. Sets
* fields in 'wc' that were used to make the determination.
*/
bool
lldp_should_process_flow(struct lldp *lldp, const struct flow *flow)
{
return (flow->dl_type == htons(ETH_TYPE_LLDP) && lldp->enabled);
}
/* Process an LLDP packet that was received on a bridge port.
*/
void
lldp_process_packet(struct lldp *lldp, const struct dp_packet *p)
{
if (lldp) {
lldpd_recv(lldp->lldpd, lldpd_first_hardware(lldp->lldpd),
(char *) dp_packet_data(p), dp_packet_size(p));
}
}
/* This code is called periodically to check if the LLDP module has an LLDP
* message it wishes to send. It is called several times every second.
*/
bool
lldp_should_send_packet(struct lldp *cfg) OVS_EXCLUDED(mutex)
{
bool ret;
ovs_mutex_lock(&mutex);
ret = timer_expired(&cfg->tx_timer);
ovs_mutex_unlock(&mutex);
/* LLDP must be enabled */
ret &= cfg->enabled;
return ret;
}
/* Returns the next wake up time.
*/
long long int
lldp_wake_time(const struct lldp *lldp) OVS_EXCLUDED(mutex)
{
long long int retval;
if (!lldp || !lldp->enabled) {
return LLONG_MAX;
}
ovs_mutex_lock(&mutex);
retval = lldp->tx_timer.t;
ovs_mutex_unlock(&mutex);
return retval;
}
/* Put the monitor thread to sleep until it's next wake time.
*/
long long int
lldp_wait(struct lldp *lldp) OVS_EXCLUDED(mutex)
{
long long int wake_time = lldp_wake_time(lldp);
poll_timer_wait_until(wake_time);
return wake_time;
}
/* Prepare the LLDP packet to be sent on a bridge port.
*/
void
lldp_put_packet(struct lldp *lldp, struct dp_packet *packet,
const struct eth_addr eth_src) OVS_EXCLUDED(mutex)
{
struct lldpd *mylldpd = lldp->lldpd;
struct lldpd_hardware *hw = lldpd_first_hardware(mylldpd);
static const struct eth_addr eth_addr_lldp = ETH_ADDR_C(01,80,c2,00,00,0e);
ovs_mutex_lock(&mutex);
eth_compose(packet, eth_addr_lldp, eth_src, ETH_TYPE_LLDP, 0);
lldpd_send(hw, packet);
timer_set_duration(&lldp->tx_timer, lldp->lldpd->g_config.c_tx_interval);
ovs_mutex_unlock(&mutex);
}
/* Configures the LLDP stack.
*/
bool
lldp_configure(struct lldp *lldp, const struct smap *cfg) OVS_EXCLUDED(mutex)
{
if (lldp) {
if (cfg && smap_get_bool(cfg, "enable", false)) {
lldp->enabled = true;
} else {
lldp->enabled = false;
}
ovs_mutex_lock(&mutex);
timer_set_expired(&lldp->tx_timer);
timer_set_duration(&lldp->tx_timer, LLDP_DEFAULT_TRANSMIT_INTERVAL_MS);
lldp->lldpd->g_config.c_tx_interval =
LLDP_DEFAULT_TRANSMIT_INTERVAL_MS;
ovs_mutex_unlock(&mutex);
}
return true;
}
/* Create an LLDP stack instance. At the moment there is one per bridge port.
*/
struct lldp *
lldp_create(const struct netdev *netdev,
const uint32_t mtu,
const struct smap *cfg) OVS_EXCLUDED(mutex)
{
struct lldp *lldp;
struct lldpd_chassis *lchassis;
struct lldpd_hardware *hw;
struct aa_mapping_internal *m;
if (!cfg || !smap_get_bool(cfg, "enable", false)) {
return NULL;
}
lldp = xzalloc(sizeof *lldp);
lldp->name = xstrdup(netdev_get_name(netdev));
lldp->lldpd = xzalloc(sizeof *lldp->lldpd);
hmap_init(&lldp->mappings_by_isid);
hmap_init(&lldp->mappings_by_aux);
ovs_list_init(&lldp->active_mapping_queue);
lchassis = xzalloc(sizeof *lchassis);
lchassis->c_cap_available = LLDP_CAP_BRIDGE;
lchassis->c_cap_enabled = LLDP_CAP_BRIDGE;
lchassis->c_id_subtype = LLDP_CHASSISID_SUBTYPE_LLADDR;
lchassis->c_id_len = ETH_ADDR_LEN;
struct eth_addr *mac = xmalloc(ETH_ADDR_LEN);
netdev_get_etheraddr(netdev, mac);
lchassis->c_id = &mac->ea[0];
ovs_list_init(&lchassis->c_mgmt);
lchassis->c_ttl = LLDP_CHASSIS_TTL;
lldpd_assign_cfg_to_protocols(lldp->lldpd);
ovs_list_init(&lldp->lldpd->g_chassis);
ovs_list_push_back(&lldp->lldpd->g_chassis, &lchassis->list);
if ((hw = lldpd_alloc_hardware(lldp->lldpd,
(char *) netdev_get_name(netdev),
0)) == NULL) {
VLOG_WARN("Unable to allocate space for %s",
(char *) netdev_get_name(netdev));
out_of_memory();
}
ovs_refcount_init(&lldp->ref_cnt);
#ifndef _WIN32
hw->h_flags |= IFF_RUNNING;
#endif
hw->h_mtu = mtu;
hw->h_lport.p_id_subtype = LLDP_PORTID_SUBTYPE_IFNAME;
hw->h_lport.p_id = xstrdup(netdev_get_name(netdev));
/* p_id is not necessarily a null terminated string. */
hw->h_lport.p_id_len = strlen(netdev_get_name(netdev));
/* Auto Attach element tlv */
hw->h_lport.p_element.type = LLDP_TLV_AA_ELEM_TYPE_CLIENT_VIRTUAL_SWITCH;
hw->h_lport.p_element.mgmt_vlan = 0;
memcpy(&hw->h_lport.p_element.system_id.system_mac,
lchassis->c_id, lchassis->c_id_len);
hw->h_lport.p_element.system_id.conn_type =
LLDP_TLV_AA_ELEM_CONN_TYPE_SINGLE;
hw->h_lport.p_element.system_id.rsvd = 0;
hw->h_lport.p_element.system_id.rsvd2[0] = 0;
hw->h_lport.p_element.system_id.rsvd2[1] = 0;
ovs_list_init(&hw->h_lport.p_isid_vlan_maps);
ovs_list_init(&lldp->lldpd->g_hardware);
ovs_list_push_back(&lldp->lldpd->g_hardware, &hw->h_entries);
ovs_mutex_lock(&mutex);
/* Update port with Auto Attach mappings configured. */
HMAP_FOR_EACH (m, hmap_node_isid, all_mappings) {
struct aa_mapping_internal *p;
if (mapping_find_by_isid(lldp, m->isid)) {
continue;
}
p = xmemdup(m, sizeof *p);
hmap_insert(&lldp->mappings_by_isid, &p->hmap_node_isid,
hash_int(p->isid, 0));
hmap_insert(&lldp->mappings_by_aux,
&p->hmap_node_aux,
hash_pointer(p->aux, 0));
update_mapping_on_lldp(lldp, hw, p);
}
hmap_insert(all_lldps, &lldp->hmap_node,
hash_string(netdev_get_name(netdev), 0));
ovs_mutex_unlock(&mutex);
return lldp;
}
struct lldp *
lldp_create_dummy(void)
{
struct lldp *lldp;
struct lldpd_chassis *lchassis;
struct lldpd_hardware *hw;
lldp = xzalloc(sizeof *lldp);
lldp->name = "dummy-lldp";
lldp->lldpd = xzalloc(sizeof *lldp->lldpd);
hmap_init(&lldp->mappings_by_isid);
hmap_init(&lldp->mappings_by_aux);
ovs_list_init(&lldp->active_mapping_queue);
lchassis = xzalloc(sizeof *lchassis);
lchassis->c_cap_available = LLDP_CAP_BRIDGE;
lchassis->c_cap_enabled = LLDP_CAP_BRIDGE;
lchassis->c_id_subtype = LLDP_CHASSISID_SUBTYPE_LLADDR;
lchassis->c_id_len = ETH_ADDR_LEN;
ovs_list_init(&lchassis->c_mgmt);
lchassis->c_ttl = LLDP_CHASSIS_TTL;
lldpd_assign_cfg_to_protocols(lldp->lldpd);
ovs_list_init(&lldp->lldpd->g_chassis);
ovs_list_push_back(&lldp->lldpd->g_chassis, &lchassis->list);
hw = lldpd_alloc_hardware(lldp->lldpd, "dummy-hw", 0);
ovs_refcount_init(&lldp->ref_cnt);
#ifndef _WIN32
hw->h_flags |= IFF_RUNNING;
#endif
hw->h_mtu = 1500;
hw->h_lport.p_id_subtype = LLDP_PORTID_SUBTYPE_IFNAME;
hw->h_lport.p_id = "dummy-port";
/* p_id is not necessarily a null terminated string. */
hw->h_lport.p_id_len = strlen(hw->h_lport.p_id);
/* Auto Attach element tlv */
hw->h_lport.p_element.type = LLDP_TLV_AA_ELEM_TYPE_CLIENT_VIRTUAL_SWITCH;
hw->h_lport.p_element.mgmt_vlan = 0;
hw->h_lport.p_element.system_id.conn_type =
LLDP_TLV_AA_ELEM_CONN_TYPE_SINGLE;
hw->h_lport.p_element.system_id.rsvd = 0;
hw->h_lport.p_element.system_id.rsvd2[0] = 0;
hw->h_lport.p_element.system_id.rsvd2[1] = 0;
ovs_list_init(&hw->h_lport.p_isid_vlan_maps);
ovs_list_init(&lldp->lldpd->g_hardware);
ovs_list_push_back(&lldp->lldpd->g_hardware, &hw->h_entries);
return lldp;
}
/* Unreference a specific LLDP instance.
*/
void
lldp_unref(struct lldp *lldp)
{
if (!lldp) {
return;
}
ovs_mutex_lock(&mutex);
if (ovs_refcount_unref_relaxed(&lldp->ref_cnt) != 1) {
ovs_mutex_unlock(&mutex);
return;
}
hmap_remove(all_lldps, &lldp->hmap_node);
ovs_mutex_unlock(&mutex);
lldpd_cleanup(lldp->lldpd);
free(lldp->lldpd);
free(lldp->name);
free(lldp);
}
/* Reference a specific LLDP instance.
*/
struct lldp *
lldp_ref(const struct lldp *lldp_)
{
struct lldp *lldp = CONST_CAST(struct lldp *, lldp_);
if (lldp) {
ovs_refcount_ref(&lldp->ref_cnt);
}
return lldp;
}
void
lldp_destroy_dummy(struct lldp *lldp)
{
struct lldpd_hardware *hw, *hw_next;
struct lldpd_chassis *chassis, *chassis_next;
struct lldpd *cfg;
if (!lldp) {
return;
}
cfg = lldp->lldpd;
LIST_FOR_EACH_SAFE (hw, hw_next, h_entries, &cfg->g_hardware) {
ovs_list_remove(&hw->h_entries);
free(hw->h_lport.p_lastframe);
free(hw);
}
LIST_FOR_EACH_SAFE (chassis, chassis_next, list, &cfg->g_chassis) {
ovs_list_remove(&chassis->list);
free(chassis);
}
free(lldp->lldpd);
free(lldp);
}
Reference in New Issue View Git Blame Copy Permalink