/
ipvswrapper.c
1087 lines (959 loc) · 27.1 KB
/
ipvswrapper.c
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/*
* Soft: Keepalived is a failover program for the LVS project
* <www.linuxvirtualserver.org>. It monitor & manipulate
* a loadbalanced server pool using multi-layer checks.
*
* Part: IPVS Kernel wrapper. Use setsockopt call to add/remove
* server to/from the loadbalanced server pool.
*
* Author: Alexandre Cassen, <acassen@linux-vs.org>
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Copyright (C) 2001-2012 Alexandre Cassen, <acassen@gmail.com>
*/
#include "ipvswrapper.h"
#include "check_data.h"
#include "list.h"
#include "utils.h"
#include "memory.h"
#include "logger.h"
/* local helpers functions */
static int parse_timeout(char *, unsigned *);
static int string_to_number(const char *, int, int);
static int modprobe_ipvs(void);
/* fetch virtual server group from group name */
virtual_server_group_t *
ipvs_get_group_by_name(char *gname, list l)
{
element e;
virtual_server_group_t *vsg;
for (e = LIST_HEAD(l); e; ELEMENT_NEXT(e)) {
vsg = ELEMENT_DATA(e);
if (!strcmp(vsg->gname, gname))
return vsg;
}
return NULL;
}
#ifdef _KRNL_2_4_ /* KERNEL 2.4 IPVS handling */
/* Global module def IPVS rules */
static struct ip_vs_rule_user *urule;
/* Initialization helpers */
int
ipvs_start(void)
{
log_message(LOG_DEBUG, "Initializing ipvs 2.4");
/* Init IPVS kernel channel */
if (ipvs_init()) {
/* try to insmod the ip_vs module if ipvs_init failed */
if (modprobe_ipvs() || ipvs_init()) {
log_message(LOG_INFO,
"IPVS : Can't initialize ipvs: %s",
ipvs_strerror(errno));
return IPVS_ERROR;
}
}
/* Allocate global user rules */
urule = (struct ip_vs_rule_user *) MALLOC(sizeof (struct ip_vs_rule_user));
return IPVS_SUCCESS;
}
void
ipvs_stop(void)
{
/* Clean up the room */
FREE(urule);
ipvs_close();
}
static int
ipvs_talk(int cmd)
{
int result;
if (result = ipvs_command(cmd, urule))
if ((cmd == IP_VS_SO_SET_EDITDEST) &&
(errno == ENOENT))
result = ipvs_command(IP_VS_SO_SET_ADDDEST, urule);
if (result)
log_message(LOG_INFO, "IPVS : %s", ipvs_strerror(errno));
return IPVS_SUCCESS;
}
int
ipvs_syncd_cmd(int cmd, char *ifname, int state, int syncid)
{
#ifdef _HAVE_IPVS_SYNCD_
memset(urule, 0, sizeof (struct ip_vs_rule_user));
/* prepare user rule */
urule->state = state;
urule->syncid = syncid;
if (ifname != NULL)
strncpy(urule->mcast_ifn, ifname, IP_VS_IFNAME_MAXLEN);
/* Talk to the IPVS channel */
return ipvs_talk(cmd);
#else
log_message(LOG_INFO, "IPVS : Sync daemon not supported");
return IPVS_ERROR;
#endif
}
/* IPVS group range rule */
static int
ipvs_group_range_cmd(int cmd, virtual_server_group_entry_t *vsg_entry)
{
uint32_t addr_ip;
int err = 0;
/* Parse the whole range */
for (addr_ip = inet_sockaddrip4(&vsg_entry->addr);
((addr_ip >> 24) & 0xFF) <= vsg_entry->range;
addr_ip += 0x01000000) {
urule->vaddr = addr_ip;
urule->vport = inet_sockaddrport(&vsg_entry->addr);
/* Talk to the IPVS channel */
err = ipvs_talk(cmd);
}
return err;
}
/* set IPVS group rules */
static int
ipvs_group_cmd(int cmd, virtual_server_t * vs, real_server_t * rs)
{
virtual_server_group_t *vsg = vs->vsg;
virtual_server_group_entry_t *vsg_entry;
list l;
element e;
int err = 1;
/* return if jointure fails */
if (!vsg) return -1;
/* visit addr_ip list */
l = vsg->addr_ip;
for (e = LIST_HEAD(l); e; ELEMENT_NEXT(e)) {
vsg_entry = ELEMENT_DATA(e);
urule->vaddr = inet_sockaddrip4(&vsg_entry->addr);
urule->vport = inet_sockaddrport(&vsg_entry->addr);
/* Talk to the IPVS channel */
if (IPVS_ALIVE(cmd, vsg_entry, rs)) {
err = ipvs_talk(cmd);
IPVS_SET_ALIVE(cmd, vsg_entry);
}
}
/* visit vfwmark list */
l = vsg->vfwmark;
urule->vaddr = 0;
urule->vport = 0;
for (e = LIST_HEAD(l); e; ELEMENT_NEXT(e)) {
vsg_entry = ELEMENT_DATA(e);
urule->vfwmark = vsg_entry->vfwmark;
/* Talk to the IPVS channel */
if (IPVS_ALIVE(cmd, vsg_entry, rs)) {
err = ipvs_talk(cmd);
IPVS_SET_ALIVE(cmd, vsg_entry);
}
}
/* visit range list */
l = vsg->range;
urule->vfwmark = 0;
for (e = LIST_HEAD(l); e; ELEMENT_NEXT(e)) {
vsg_entry = ELEMENT_DATA(e);
/* Talk to the IPVS channel */
if (IPVS_ALIVE(cmd, vsg_entry, rs)) {
err = ipvs_group_range_cmd(cmd, vsg_entry);
IPVS_SET_ALIVE(cmd, vsg_entry);
}
}
return err;
}
/* Fill IPVS rule with root vs infos */
void
ipvs_set_rule(int cmd, virtual_server_t * vs, real_server_t * rs)
{
/* Clean up target rule */
memset(urule, 0, sizeof (struct ip_vs_rule_user));
strncpy(urule->sched_name, vs->sched, IP_VS_SCHEDNAME_MAXLEN);
urule->weight = 1;
urule->conn_flags = vs->loadbalancing_kind;
urule->netmask = ((u_int32_t) 0xffffffff);
urule->protocol = vs->service_type;
if (!parse_timeout(vs->timeout_persistence, &urule->timeout))
log_message(LOG_INFO, "IPVS : Virtual service %s illegal timeout."
, FMT_VS(vs));
if (urule->timeout != 0 || vs->granularity_persistence)
urule->vs_flags = IP_VS_SVC_F_PERSISTENT;
if (cmd == IP_VS_SO_SET_ADD || cmd == IP_VS_SO_SET_DEL)
if (vs->granularity_persistence)
urule->netmask = vs->granularity_persistence;
/* SVR specific */
if (rs) {
if (cmd == IP_VS_SO_SET_ADDDEST
|| cmd == IP_VS_SO_SET_DELDEST
|| cmd == IP_VS_SO_SET_EDITDEST) {
urule->weight = rs->weight;
urule->daddr = inet_sockaddrip4(&rs->addr);
urule->dport = inet_sockaddrport(&rs->addr);
}
}
}
/* Set/Remove a RS from a VS */
int
ipvs_cmd(int cmd, virtual_server_t * vs, real_server_t * rs)
{
int err = 0;
/* Prepare target rule */
ipvs_set_rule(cmd, vs, rs);
/* Does the service use inhibit flag ? */
if (cmd == IP_VS_SO_SET_DELDEST && rs->inhibit) {
urule->weight = 0;
cmd = IP_VS_SO_SET_EDITDEST;
}
if (cmd == IP_VS_SO_SET_ADDDEST && rs->inhibit && rs->set)
cmd = IP_VS_SO_SET_EDITDEST;
/* Set flag */
if (cmd == IP_VS_SO_SET_ADDDEST && !rs->set)
rs->set = 1;
if (cmd == IP_VS_SO_SET_DELDEST && rs->set)
rs->set = 0;
/* Set vs rule and send to kernel */
if (vs->vsgname) {
err = ipvs_group_cmd(cmd, vs, rs);
} else {
if (vs->vfwmark) {
urule->vfwmark = vs->vfwmark;
} else {
urule->vaddr = inet_sockaddrip4(&vs->addr);
urule->vport = inet_sockaddrport(&vs->addr);
}
/* Talk to the IPVS channel */
err = ipvs_talk(cmd);
}
return err;
}
/* add alive destinations to the newly created vsge */
int
ipvs_group_sync_entry(virtual_server_t *vs, virtual_server_group_entry_t *vsge)
{
real_server_t *rs;
int err = 0;
element e;
list l = vs->rs;
/* Clean target rules */
memset(urule, 0, sizeof (struct ip_vs_rule_user));
/* Process realserver queue */
for (e = LIST_HEAD(l); e; ELEMENT_NEXT(e)) {
rs = ELEMENT_DATA(e);
if (rs->reloaded && (rs->alive || rs->inhibit && rs->set)) {
/* Prepare the IPVS rule */
if (urule->daddr) {
/* Setting IPVS rule with vs root rs */
ipvs_set_rule(IP_VS_SO_SET_ADDDEST, vs, rs);
} else {
urule->daddr = inet_sockaddrip4(&rs->addr);
urule->dport = inet_sockaddrport(&rs->addr);
}
urule->weight = rs->inhibit && ! rs->alive ? 0: rs->weight;
/* Set vs rule */
if (vsge->range) {
ipvs_group_range_cmd(IP_VS_SO_SET_ADDDEST, vsge);
} else {
urule->vfwmark = vsge->vfwmark;
urule->vaddr = inet_sockaddrip4(&vsge->addr);
urule->vport = inet_sockaddrport(&vsge->addr);
/* Talk to the IPVS channel */
err = ipvs_talk(IP_VS_SO_SET_ADDDEST);
}
}
}
return IPVS_SUCCESS;
}
/* Remove a specific vs group entry */
int
ipvs_group_remove_entry(virtual_server_t *vs, virtual_server_group_entry_t *vsge)
{
real_server_t *rs;
int err = 0;
element e;
list l = vs->rs;
/* Clean target rules */
memset(urule, 0, sizeof (struct ip_vs_rule_user));
/* Process realserver queue */
for (e = LIST_HEAD(l); e; ELEMENT_NEXT(e)) {
rs = ELEMENT_DATA(e);
if (rs->alive) {
/* Prepare the IPVS rule */
if (urule->daddr) {
/* Setting IPVS rule with vs root rs */
ipvs_set_rule(IP_VS_SO_SET_DELDEST, vs, rs);
} else {
urule->weight = rs->weight;
urule->daddr = inet_sockaddrip4(&rs->addr);
urule->dport = inet_sockaddrport(&rs->addr);
}
/* Set vs rule */
if (vsge->range) {
ipvs_group_range_cmd(IP_VS_SO_SET_DELDEST, vsge);
} else {
urule->vfwmark = vsge->vfwmark;
urule->vaddr = inet_sockaddrip4(&vsge->addr);
urule->vport = inet_sockaddrport(&vsge->addr);
/* Talk to the IPVS channel */
err = ipvs_talk(IP_VS_SO_SET_DELDEST);
}
}
}
/* Remove VS entry */
if (vsge->range)
err = ipvs_group_range_cmd(IP_VS_SO_SET_DEL, vsge);
else
err = ipvs_talk(IP_VS_SO_SET_DEL);
UNSET_ALIVE(vsge);
return err;
}
#else /* KERNEL 2.6 IPVS handling */
/* Global module def IPVS rules */
static ipvs_service_t *srule;
static ipvs_dest_t *drule;
static ipvs_daemon_t *daemonrule;
/* Initialization helpers */
int
ipvs_start(void)
{
log_message(LOG_DEBUG, "Initializing ipvs 2.6");
/* Initialize IPVS module */
if (ipvs_init()) {
if (modprobe_ipvs() || ipvs_init()) {
log_message(LOG_INFO, "IPVS: Can't initialize ipvs: %s",
ipvs_strerror(errno));
return IPVS_ERROR;
}
}
/* Allocate global user rules */
srule = (ipvs_service_t *) MALLOC(sizeof(ipvs_service_t));
drule = (ipvs_dest_t *) MALLOC(sizeof(ipvs_dest_t));
daemonrule = (ipvs_daemon_t *) MALLOC(sizeof(ipvs_daemon_t));
return IPVS_SUCCESS;
}
void
ipvs_stop(void)
{
/* Clean up the room */
FREE(srule);
FREE(drule);
FREE(daemonrule);
ipvs_close();
}
/* Send user rules to IPVS module */
static void
ipvs_talk(int cmd)
{
int result = -1;
switch (cmd) {
case IP_VS_SO_SET_STARTDAEMON:
result = ipvs_start_daemon(daemonrule);
break;
case IP_VS_SO_SET_STOPDAEMON:
result = ipvs_stop_daemon(daemonrule);
break;
case IP_VS_SO_SET_ADD:
result = ipvs_add_service(srule);
break;
case IP_VS_SO_SET_DEL:
result = ipvs_del_service(srule);
break;
case IP_VS_SO_SET_EDIT:
result = ipvs_update_service(srule);
break;
case IP_VS_SO_SET_ZERO:
result = ipvs_zero_service(srule);
break;
case IP_VS_SO_SET_ADDDEST:
result = ipvs_add_dest(srule, drule);
break;
case IP_VS_SO_SET_DELDEST:
result = ipvs_del_dest(srule, drule);
break;
case IP_VS_SO_SET_EDITDEST:
if ((result = ipvs_update_dest(srule, drule)) &&
(errno == ENOENT))
result = ipvs_add_dest(srule, drule);
break;
}
if (result)
log_message(LOG_INFO, "IPVS: %s", ipvs_strerror(errno));
}
int
ipvs_syncd_cmd(int cmd, char *ifname, int state, int syncid)
{
memset(daemonrule, 0, sizeof(ipvs_daemon_t));
/* prepare user rule */
daemonrule->state = state;
daemonrule->syncid = syncid;
if (ifname != NULL)
strncpy(daemonrule->mcast_ifn, ifname, IP_VS_IFNAME_MAXLEN);
/* Talk to the IPVS channel */
ipvs_talk(cmd);
return IPVS_SUCCESS;
}
/* IPVS group range rule */
static void
ipvs_group_range_cmd(int cmd, virtual_server_group_entry_t *vsg_entry)
{
uint32_t addr_ip, ip;
if (vsg_entry->addr.ss_family == AF_INET6) {
inet_sockaddrip6(&vsg_entry->addr, &srule->addr.in6);
ip = srule->addr.in6.s6_addr32[3];
} else {
ip = inet_sockaddrip4(&vsg_entry->addr);
}
/* Set Address Family */
srule->af = vsg_entry->addr.ss_family;
/* Parse the whole range */
for (addr_ip = ip;
((addr_ip >> 24) & 0xFF) <= vsg_entry->range;
addr_ip += 0x01000000) {
if (srule->af == AF_INET6) {
if (srule->netmask == 0xffffffff)
srule->netmask = 128;
srule->addr.in6.s6_addr32[3] = addr_ip;
} else {
srule->addr.ip = addr_ip;
}
srule->port = inet_sockaddrport(&vsg_entry->addr);
/* Talk to the IPVS channel */
ipvs_talk(cmd);
}
}
/* set IPVS group rules */
static void
ipvs_group_cmd(int cmd, virtual_server_t * vs, real_server_t * rs)
{
virtual_server_group_t *vsg = vs->vsg;
virtual_server_group_entry_t *vsg_entry;
list l;
element e;
/* return if jointure fails */
if (!vsg) return;
/* visit addr_ip list */
l = vsg->addr_ip;
for (e = LIST_HEAD(l); e; ELEMENT_NEXT(e)) {
vsg_entry = ELEMENT_DATA(e);
srule->af = vsg_entry->addr.ss_family;
if (vsg_entry->addr.ss_family == AF_INET6) {
if (srule->netmask == 0xffffffff)
srule->netmask = 128;
inet_sockaddrip6(&vsg_entry->addr, &srule->addr.in6);
} else
srule->addr.ip = inet_sockaddrip4(&vsg_entry->addr);
srule->port = inet_sockaddrport(&vsg_entry->addr);
/* Talk to the IPVS channel */
if (IPVS_ALIVE(cmd, vsg_entry, rs)) {
ipvs_talk(cmd);
IPVS_SET_ALIVE(cmd, vsg_entry);
}
}
/* visit vfwmark list */
l = vsg->vfwmark;
srule->addr.ip = 0;
srule->af = 0;
srule->port = 0;
for (e = LIST_HEAD(l); e; ELEMENT_NEXT(e)) {
vsg_entry = ELEMENT_DATA(e);
srule->af = AF_INET;
/* Need to get address family from first real server */
if (vs->rs && !LIST_ISEMPTY(vs->rs) &&
(((real_server_t *)ELEMENT_DATA(LIST_HEAD(vs->rs)))->addr.ss_family == AF_INET6)) {
srule->af = AF_INET6;
srule->netmask = 128;
}
srule->fwmark = vsg_entry->vfwmark;
/* Talk to the IPVS channel */
if (IPVS_ALIVE(cmd, vsg_entry, rs)) {
ipvs_talk(cmd);
IPVS_SET_ALIVE(cmd, vsg_entry);
}
}
/* visit range list */
l = vsg->range;
srule->fwmark = 0;
for (e = LIST_HEAD(l); e; ELEMENT_NEXT(e)) {
vsg_entry = ELEMENT_DATA(e);
/* Talk to the IPVS channel */
if (IPVS_ALIVE(cmd, vsg_entry, rs)) {
ipvs_group_range_cmd(cmd, vsg_entry);
IPVS_SET_ALIVE(cmd, vsg_entry);
}
}
}
/* Fill IPVS rule with root vs infos */
void
ipvs_set_rule(int cmd, virtual_server_t * vs, real_server_t * rs)
{
/* Clean target rule */
memset(drule, 0, sizeof(ipvs_dest_t));
drule->weight = 1;
drule->u_threshold = 0;
drule->l_threshold = 0;
drule->conn_flags = vs->loadbalancing_kind;
strncpy(srule->sched_name, vs->sched, IP_VS_SCHEDNAME_MAXLEN);
srule->netmask = (vs->addr.ss_family == AF_INET6) ? 128 : ((u_int32_t) 0xffffffff);
srule->protocol = vs->service_type;
if (!parse_timeout(vs->timeout_persistence, &srule->timeout))
log_message(LOG_INFO, "IPVS : Virtual service %s illegal timeout."
, FMT_VS(vs));
if (srule->timeout != 0 || vs->granularity_persistence)
srule->flags |= IP_VS_SVC_F_PERSISTENT;
/* Only for UDP services */
if (vs->ops == 1 && srule->protocol == IPPROTO_UDP)
srule->flags |= IP_VS_SVC_F_ONEPACKET;
if (cmd == IP_VS_SO_SET_ADD || cmd == IP_VS_SO_SET_DEL)
if (vs->granularity_persistence)
srule->netmask = vs->granularity_persistence;
/* SVR specific */
if (rs) {
if (cmd == IP_VS_SO_SET_ADDDEST || cmd == IP_VS_SO_SET_DELDEST ||
cmd == IP_VS_SO_SET_EDITDEST) {
drule->af = rs->addr.ss_family;
if (rs->addr.ss_family == AF_INET6)
inet_sockaddrip6(&rs->addr, &drule->addr.in6);
else
drule->addr.ip = inet_sockaddrip4(&rs->addr);
drule->port = inet_sockaddrport(&rs->addr);
drule->weight = rs->weight;
drule->u_threshold = rs->u_threshold;
drule->l_threshold = rs->l_threshold;
}
}
}
/* Set/Remove a RS from a VS */
int
ipvs_cmd(int cmd, virtual_server_t * vs, real_server_t * rs)
{
/* Allocate the room */
memset(srule, 0, sizeof(ipvs_service_t));
ipvs_set_rule(cmd, vs, rs);
/* Does the service use inhibit flag ? */
if (cmd == IP_VS_SO_SET_DELDEST && rs->inhibit) {
drule->weight = 0;
cmd = IP_VS_SO_SET_EDITDEST;
}
if (cmd == IP_VS_SO_SET_ADDDEST && rs->inhibit && rs->set)
cmd = IP_VS_SO_SET_EDITDEST;
/* Set flag */
if (cmd == IP_VS_SO_SET_ADDDEST && !rs->set)
rs->set = 1;
if (cmd == IP_VS_SO_SET_DELDEST && rs->set)
rs->set = 0;
/* Set vs rule and send to kernel */
if (vs->vsgname) {
ipvs_group_cmd(cmd, vs, rs);
} else {
if (vs->vfwmark) {
srule->af = AF_INET;
/* Need to get address family from first real server */
if (vs->rs && !LIST_ISEMPTY(vs->rs) &&
(((real_server_t *)ELEMENT_DATA(LIST_HEAD(vs->rs)))->addr.ss_family == AF_INET6)) {
srule->af = AF_INET6;
srule->netmask = 128;
}
srule->fwmark = vs->vfwmark;
} else {
srule->af = vs->addr.ss_family;
if (vs->addr.ss_family == AF_INET6)
inet_sockaddrip6(&vs->addr, &srule->addr.in6);
else
srule->addr.ip = inet_sockaddrip4(&vs->addr);
srule->port = inet_sockaddrport(&vs->addr);
}
/* Talk to the IPVS channel */
ipvs_talk(cmd);
}
return IPVS_SUCCESS;
}
/* add alive destinations to the newly created vsge */
int
ipvs_group_sync_entry(virtual_server_t *vs, virtual_server_group_entry_t *vsge)
{
real_server_t *rs;
element e;
list l = vs->rs;
/* Clean target rules */
memset(srule, 0, sizeof(ipvs_service_t));
memset(drule, 0, sizeof(ipvs_dest_t));
/* Process realserver queue */
for (e = LIST_HEAD(l); e; ELEMENT_NEXT(e)) {
rs = ELEMENT_DATA(e);
if (rs->reloaded && (rs->alive || (rs->inhibit && rs->set))) {
/* Prepare the IPVS rule */
if (!drule->addr.ip) {
/* Setting IPVS rule with vs root rs */
ipvs_set_rule(IP_VS_SO_SET_ADDDEST, vs, rs);
} else {
drule->af = rs->addr.ss_family;
if (rs->addr.ss_family == AF_INET6)
inet_sockaddrip6(&rs->addr, &drule->addr.in6);
else
drule->addr.ip = inet_sockaddrip4(&rs->addr);
drule->port = inet_sockaddrport(&rs->addr);
}
drule->weight = rs->inhibit && ! rs->alive ? 0: rs->weight;
/* Set vs rule */
if (vsge->range) {
ipvs_group_range_cmd(IP_VS_SO_SET_ADDDEST, vsge);
} else {
srule->af = vsge->addr.ss_family;
if (vsge->addr.ss_family == AF_INET6)
inet_sockaddrip6(&vsge->addr, &srule->addr.in6);
else
srule->addr.ip = inet_sockaddrip4(&vsge->addr);
srule->port = inet_sockaddrport(&vsge->addr);
srule->fwmark = vsge->vfwmark;
drule->u_threshold = rs->u_threshold;
drule->l_threshold = rs->l_threshold;
/* Talk to the IPVS channel */
ipvs_talk(IP_VS_SO_SET_ADDDEST);
}
}
}
return IPVS_SUCCESS;
}
/* Remove a specific vs group entry */
int
ipvs_group_remove_entry(virtual_server_t *vs, virtual_server_group_entry_t *vsge)
{
real_server_t *rs;
element e;
list l = vs->rs;
/* Clean target rules */
memset(srule, 0, sizeof(ipvs_service_t));
memset(drule, 0, sizeof(ipvs_dest_t));
/* Process realserver queue */
for (e = LIST_HEAD(l); e; ELEMENT_NEXT(e)) {
rs = ELEMENT_DATA(e);
if (rs->alive) {
/* Prepare the IPVS rule */
if (!drule->addr.ip) {
/* Setting IPVS rule with vs root rs */
ipvs_set_rule(IP_VS_SO_SET_DELDEST, vs, rs);
} else {
drule->af = rs->addr.ss_family;
if (rs->addr.ss_family == AF_INET6)
inet_sockaddrip6(&rs->addr, &drule->addr.in6);
else
drule->addr.ip = inet_sockaddrip4(&rs->addr);
drule->port = inet_sockaddrport(&rs->addr);
drule->weight = rs->weight;
}
/* Set vs rule */
if (vsge->range) {
ipvs_group_range_cmd(IP_VS_SO_SET_DELDEST, vsge);
} else {
srule->af = vsge->addr.ss_family;
if (vsge->addr.ss_family == AF_INET6)
inet_sockaddrip6(&vsge->addr, &srule->addr.in6);
else
srule->addr.ip = inet_sockaddrip4(&vsge->addr);
srule->port = inet_sockaddrport(&vsge->addr);
srule->fwmark = vsge->vfwmark;
drule->u_threshold = rs->u_threshold;
drule->l_threshold = rs->l_threshold;
/* Talk to the IPVS channel */
ipvs_talk(IP_VS_SO_SET_DELDEST);
}
}
}
/* Remove VS entry */
if (vsge->range)
ipvs_group_range_cmd(IP_VS_SO_SET_DEL, vsge);
else
ipvs_talk(IP_VS_SO_SET_DEL);
UNSET_ALIVE(vsge);
return IPVS_SUCCESS;
}
#ifdef _WITH_SNMP_
/* Update statistics for a given virtual server. This includes
statistics of real servers. The update is only done if we need
refreshing. */
void
ipvs_update_stats(virtual_server_t *vs)
{
element e, ge = NULL;
real_server_t *rs;
virtual_server_group_t *vsg = NULL;
virtual_server_group_entry_t *vsg_entry = NULL;
uint32_t addr_ip = 0;
union nf_inet_addr nfaddr;
ipvs_service_entry_t * serv = NULL;
struct ip_vs_get_dests * dests = NULL;
int i;
#define UPDATE_STATS_INIT 1
#define UPDATE_STATS_VSG_IP 2
#define UPDATE_STATS_VSG_FWMARK 4
#define UPDATE_STATS_VSG_RANGE 6
#define UPDATE_STATS_VSG_RANGE_IP 7
#define UPDATE_STATS_END 99
int state = UPDATE_STATS_INIT;
if (time(NULL) - vs->lastupdated < STATS_REFRESH)
return;
vs->lastupdated = time(NULL);
/* Reset stats */
memset(&vs->stats, 0, sizeof(vs->stats));
if (vs->s_svr) {
memset(&vs->s_svr->stats, 0, sizeof(vs->s_svr->stats));
vs->s_svr->activeconns =
vs->s_svr->inactconns = vs->s_svr->persistconns = 0;
}
if (!LIST_ISEMPTY(vs->rs)) {
for (e = LIST_HEAD(vs->rs); e; ELEMENT_NEXT(e)) {
rs = ELEMENT_DATA(e);
memset(&rs->stats, 0, sizeof(rs->stats));
rs->activeconns = rs->inactconns = rs->persistconns = 0;
}
}
/* FSM: at each transition, we process "serv" if it is not NULL */
while (state != UPDATE_STATS_END) {
serv = NULL;
switch (state) {
case UPDATE_STATS_INIT:
/* We need to know the next state to reach */
if (vs->vsgname) {
if (!LIST_ISEMPTY(check_data->vs_group))
vsg = ipvs_get_group_by_name(vs->vsgname,
check_data->vs_group);
else
vsg = NULL;
if (!vsg)
state = UPDATE_STATS_END;
else {
state = UPDATE_STATS_VSG_IP;
ge = NULL;
}
continue;
}
state = UPDATE_STATS_END;
if (vs->vfwmark) {
memset(&nfaddr, 0, sizeof(nfaddr));
serv = ipvs_get_service(vs->vfwmark,
AF_INET,
vs->service_type,
nfaddr, 0);
break;
}
memcpy(&nfaddr, (vs->addr.ss_family == AF_INET6)?
(void*)(&((struct sockaddr_in6 *)&vs->addr)->sin6_addr):
(void*)(&((struct sockaddr_in *)&vs->addr)->sin_addr),
sizeof(nfaddr));
serv = ipvs_get_service(0,
vs->addr.ss_family,
vs->service_type,
nfaddr,
inet_sockaddrport(&vs->addr));
break;
case UPDATE_STATS_VSG_IP:
if (!ge)
ge = LIST_HEAD(vsg->addr_ip);
else
ELEMENT_NEXT(ge);
if (!ge) {
state = UPDATE_STATS_VSG_FWMARK;
continue;
}
vsg_entry = ELEMENT_DATA(ge);
memcpy(&nfaddr, (vsg_entry->addr.ss_family == AF_INET6)?
(void*)(&((struct sockaddr_in6 *)&vsg_entry->addr)->sin6_addr):
(void*)(&((struct sockaddr_in *)&vsg_entry->addr)->sin_addr),
sizeof(nfaddr));
serv = ipvs_get_service(0,
vsg_entry->addr.ss_family,
vs->service_type,
nfaddr,
inet_sockaddrport(&vsg_entry->addr));
break;
case UPDATE_STATS_VSG_FWMARK:
if (!ge)
ge = LIST_HEAD(vsg->vfwmark);
else
ELEMENT_NEXT(ge);
if (!ge) {
state = UPDATE_STATS_VSG_RANGE;
continue;
}
vsg_entry = ELEMENT_DATA(ge);
memset(&nfaddr, 0, sizeof(nfaddr));
serv = ipvs_get_service(vsg_entry->vfwmark,
AF_INET,
vs->service_type,
nfaddr, 0);
break;
case UPDATE_STATS_VSG_RANGE:
if (!ge)
ge = LIST_HEAD(vsg->range);
else
ELEMENT_NEXT(ge);
if (!ge) {
state = UPDATE_STATS_END;
continue;
}
vsg_entry = ELEMENT_DATA(ge);
addr_ip = (vsg_entry->addr.ss_family == AF_INET6) ?
((struct sockaddr_in6 *)&vsg_entry->addr)->sin6_addr.s6_addr32[3]:
((struct sockaddr_in *)&vsg_entry->addr)->sin_addr.s_addr;
state = UPDATE_STATS_VSG_RANGE_IP;
continue;
case UPDATE_STATS_VSG_RANGE_IP:
if (((addr_ip >> 24) & 0xFF) > vsg_entry->range) {
state = UPDATE_STATS_VSG_RANGE;
continue;
}
if (vsg_entry->addr.ss_family == AF_INET6) {
inet_sockaddrip6(&vsg_entry->addr, &nfaddr.in6);
nfaddr.in6.s6_addr32[3] = addr_ip;
} else {
nfaddr.in.s_addr = addr_ip;
}
serv = ipvs_get_service(0,
vsg_entry->addr.ss_family,
vs->service_type,
nfaddr,
inet_sockaddrport(&vsg_entry->addr));
addr_ip += 0x01000000;
break;
}
if (!serv)
continue;
/* Update virtual server stats */
#define ADD_TO_VSSTATS(X) vs->stats.X += serv->stats.X;
ADD_TO_VSSTATS(conns);
ADD_TO_VSSTATS(inpkts);
ADD_TO_VSSTATS(outpkts);
ADD_TO_VSSTATS(inbytes);
ADD_TO_VSSTATS(outbytes);
ADD_TO_VSSTATS(cps);
ADD_TO_VSSTATS(inpps);
ADD_TO_VSSTATS(outpps);
ADD_TO_VSSTATS(inbps);
ADD_TO_VSSTATS(outbps);
/* Get real servers */
dests = ipvs_get_dests(serv);
if (!dests) {
FREE(serv);
return;
}
for (i = 0; i < dests->num_dests; i++) {
rs = NULL;
#define VSD_EQUAL(entity) (((entity)->addr.ss_family == AF_INET && \
dests->entrytable[i].af == AF_INET && \
inaddr_equal(AF_INET, \
&dests->entrytable[i].addr, \
&((struct sockaddr_in *)&(entity)->addr)->sin_addr) && \
dests->entrytable[i].port == ((struct sockaddr_in *)&(entity)->addr)->sin_port) || \
((entity)->addr.ss_family == AF_INET6 && \
dests->entrytable[i].af == AF_INET6 && \
inaddr_equal(AF_INET6, \
&dests->entrytable[i].addr, \
&((struct sockaddr_in6 *)&(entity)->addr)->sin6_addr) && \
dests->entrytable[i].port == ((struct sockaddr_in6 *)&(entity)->addr)->sin6_port))
/* Is it the sorry server? */
if (vs->s_svr && VSD_EQUAL(vs->s_svr))
rs = vs->s_svr;
else if (!LIST_ISEMPTY(vs->rs))
/* Search for a match in the list of real servers */
for (e = LIST_HEAD(vs->rs); e; ELEMENT_NEXT(e)) {
rs = ELEMENT_DATA(e);
if (VSD_EQUAL(rs))
break;
}
if (rs) {
#define ADD_TO_RSSTATS(X) rs->X += dests->entrytable[i].X
ADD_TO_RSSTATS(activeconns);
ADD_TO_RSSTATS(inactconns);
ADD_TO_RSSTATS(persistconns);
ADD_TO_RSSTATS(stats.conns);
ADD_TO_RSSTATS(stats.inpkts);
ADD_TO_RSSTATS(stats.outpkts);
ADD_TO_RSSTATS(stats.inbytes);
ADD_TO_RSSTATS(stats.outbytes);
ADD_TO_RSSTATS(stats.cps);
ADD_TO_RSSTATS(stats.inpps);
ADD_TO_RSSTATS(stats.outpps);
ADD_TO_RSSTATS(stats.inbps);
ADD_TO_RSSTATS(stats.outbps);
}
}
FREE(dests);
FREE(serv);
}
}