// SPDX-License-Identifier: GPL-2.0-or-later
|
/*
|
* IPVS An implementation of the IP virtual server support for the
|
* LINUX operating system. IPVS is now implemented as a module
|
* over the NetFilter framework. IPVS can be used to build a
|
* high-performance and highly available server based on a
|
* cluster of servers.
|
*
|
* Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
|
* Peter Kese <peter.kese@ijs.si>
|
* Julian Anastasov <ja@ssi.bg>
|
*
|
* Changes:
|
*/
|
|
#define KMSG_COMPONENT "IPVS"
|
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
|
|
#include <linux/module.h>
|
#include <linux/init.h>
|
#include <linux/types.h>
|
#include <linux/capability.h>
|
#include <linux/fs.h>
|
#include <linux/sysctl.h>
|
#include <linux/proc_fs.h>
|
#include <linux/workqueue.h>
|
#include <linux/swap.h>
|
#include <linux/seq_file.h>
|
#include <linux/slab.h>
|
|
#include <linux/netfilter.h>
|
#include <linux/netfilter_ipv4.h>
|
#include <linux/mutex.h>
|
|
#include <net/net_namespace.h>
|
#include <linux/nsproxy.h>
|
#include <net/ip.h>
|
#ifdef CONFIG_IP_VS_IPV6
|
#include <net/ipv6.h>
|
#include <net/ip6_route.h>
|
#include <net/netfilter/ipv6/nf_defrag_ipv6.h>
|
#endif
|
#include <net/route.h>
|
#include <net/sock.h>
|
#include <net/genetlink.h>
|
|
#include <linux/uaccess.h>
|
|
#include <net/ip_vs.h>
|
|
/* semaphore for IPVS sockopts. And, [gs]etsockopt may sleep. */
|
static DEFINE_MUTEX(__ip_vs_mutex);
|
|
/* sysctl variables */
|
|
#ifdef CONFIG_IP_VS_DEBUG
|
static int sysctl_ip_vs_debug_level = 0;
|
|
int ip_vs_get_debug_level(void)
|
{
|
return sysctl_ip_vs_debug_level;
|
}
|
#endif
|
|
|
/* Protos */
|
static void __ip_vs_del_service(struct ip_vs_service *svc, bool cleanup);
|
|
|
#ifdef CONFIG_IP_VS_IPV6
|
/* Taken from rt6_fill_node() in net/ipv6/route.c, is there a better way? */
|
static bool __ip_vs_addr_is_local_v6(struct net *net,
|
const struct in6_addr *addr)
|
{
|
struct flowi6 fl6 = {
|
.daddr = *addr,
|
};
|
struct dst_entry *dst = ip6_route_output(net, NULL, &fl6);
|
bool is_local;
|
|
is_local = !dst->error && dst->dev && (dst->dev->flags & IFF_LOOPBACK);
|
|
dst_release(dst);
|
return is_local;
|
}
|
#endif
|
|
#ifdef CONFIG_SYSCTL
|
/*
|
* update_defense_level is called from keventd and from sysctl,
|
* so it needs to protect itself from softirqs
|
*/
|
static void update_defense_level(struct netns_ipvs *ipvs)
|
{
|
struct sysinfo i;
|
int availmem;
|
int nomem;
|
int to_change = -1;
|
|
/* we only count free and buffered memory (in pages) */
|
si_meminfo(&i);
|
availmem = i.freeram + i.bufferram;
|
/* however in linux 2.5 the i.bufferram is total page cache size,
|
we need adjust it */
|
/* si_swapinfo(&i); */
|
/* availmem = availmem - (i.totalswap - i.freeswap); */
|
|
nomem = (availmem < ipvs->sysctl_amemthresh);
|
|
local_bh_disable();
|
|
/* drop_entry */
|
spin_lock(&ipvs->dropentry_lock);
|
switch (ipvs->sysctl_drop_entry) {
|
case 0:
|
atomic_set(&ipvs->dropentry, 0);
|
break;
|
case 1:
|
if (nomem) {
|
atomic_set(&ipvs->dropentry, 1);
|
ipvs->sysctl_drop_entry = 2;
|
} else {
|
atomic_set(&ipvs->dropentry, 0);
|
}
|
break;
|
case 2:
|
if (nomem) {
|
atomic_set(&ipvs->dropentry, 1);
|
} else {
|
atomic_set(&ipvs->dropentry, 0);
|
ipvs->sysctl_drop_entry = 1;
|
}
|
break;
|
case 3:
|
atomic_set(&ipvs->dropentry, 1);
|
break;
|
}
|
spin_unlock(&ipvs->dropentry_lock);
|
|
/* drop_packet */
|
spin_lock(&ipvs->droppacket_lock);
|
switch (ipvs->sysctl_drop_packet) {
|
case 0:
|
ipvs->drop_rate = 0;
|
break;
|
case 1:
|
if (nomem) {
|
ipvs->drop_rate = ipvs->drop_counter
|
= ipvs->sysctl_amemthresh /
|
(ipvs->sysctl_amemthresh-availmem);
|
ipvs->sysctl_drop_packet = 2;
|
} else {
|
ipvs->drop_rate = 0;
|
}
|
break;
|
case 2:
|
if (nomem) {
|
ipvs->drop_rate = ipvs->drop_counter
|
= ipvs->sysctl_amemthresh /
|
(ipvs->sysctl_amemthresh-availmem);
|
} else {
|
ipvs->drop_rate = 0;
|
ipvs->sysctl_drop_packet = 1;
|
}
|
break;
|
case 3:
|
ipvs->drop_rate = ipvs->sysctl_am_droprate;
|
break;
|
}
|
spin_unlock(&ipvs->droppacket_lock);
|
|
/* secure_tcp */
|
spin_lock(&ipvs->securetcp_lock);
|
switch (ipvs->sysctl_secure_tcp) {
|
case 0:
|
if (ipvs->old_secure_tcp >= 2)
|
to_change = 0;
|
break;
|
case 1:
|
if (nomem) {
|
if (ipvs->old_secure_tcp < 2)
|
to_change = 1;
|
ipvs->sysctl_secure_tcp = 2;
|
} else {
|
if (ipvs->old_secure_tcp >= 2)
|
to_change = 0;
|
}
|
break;
|
case 2:
|
if (nomem) {
|
if (ipvs->old_secure_tcp < 2)
|
to_change = 1;
|
} else {
|
if (ipvs->old_secure_tcp >= 2)
|
to_change = 0;
|
ipvs->sysctl_secure_tcp = 1;
|
}
|
break;
|
case 3:
|
if (ipvs->old_secure_tcp < 2)
|
to_change = 1;
|
break;
|
}
|
ipvs->old_secure_tcp = ipvs->sysctl_secure_tcp;
|
if (to_change >= 0)
|
ip_vs_protocol_timeout_change(ipvs,
|
ipvs->sysctl_secure_tcp > 1);
|
spin_unlock(&ipvs->securetcp_lock);
|
|
local_bh_enable();
|
}
|
|
/* Handler for delayed work for expiring no
|
* destination connections
|
*/
|
static void expire_nodest_conn_handler(struct work_struct *work)
|
{
|
struct netns_ipvs *ipvs;
|
|
ipvs = container_of(work, struct netns_ipvs,
|
expire_nodest_conn_work.work);
|
ip_vs_expire_nodest_conn_flush(ipvs);
|
}
|
|
/*
|
* Timer for checking the defense
|
*/
|
#define DEFENSE_TIMER_PERIOD 1*HZ
|
|
static void defense_work_handler(struct work_struct *work)
|
{
|
struct netns_ipvs *ipvs =
|
container_of(work, struct netns_ipvs, defense_work.work);
|
|
update_defense_level(ipvs);
|
if (atomic_read(&ipvs->dropentry))
|
ip_vs_random_dropentry(ipvs);
|
queue_delayed_work(system_long_wq, &ipvs->defense_work,
|
DEFENSE_TIMER_PERIOD);
|
}
|
#endif
|
|
int
|
ip_vs_use_count_inc(void)
|
{
|
return try_module_get(THIS_MODULE);
|
}
|
|
void
|
ip_vs_use_count_dec(void)
|
{
|
module_put(THIS_MODULE);
|
}
|
|
|
/*
|
* Hash table: for virtual service lookups
|
*/
|
#define IP_VS_SVC_TAB_BITS 8
|
#define IP_VS_SVC_TAB_SIZE (1 << IP_VS_SVC_TAB_BITS)
|
#define IP_VS_SVC_TAB_MASK (IP_VS_SVC_TAB_SIZE - 1)
|
|
/* the service table hashed by <protocol, addr, port> */
|
static struct hlist_head ip_vs_svc_table[IP_VS_SVC_TAB_SIZE];
|
/* the service table hashed by fwmark */
|
static struct hlist_head ip_vs_svc_fwm_table[IP_VS_SVC_TAB_SIZE];
|
|
|
/*
|
* Returns hash value for virtual service
|
*/
|
static inline unsigned int
|
ip_vs_svc_hashkey(struct netns_ipvs *ipvs, int af, unsigned int proto,
|
const union nf_inet_addr *addr, __be16 port)
|
{
|
unsigned int porth = ntohs(port);
|
__be32 addr_fold = addr->ip;
|
__u32 ahash;
|
|
#ifdef CONFIG_IP_VS_IPV6
|
if (af == AF_INET6)
|
addr_fold = addr->ip6[0]^addr->ip6[1]^
|
addr->ip6[2]^addr->ip6[3];
|
#endif
|
ahash = ntohl(addr_fold);
|
ahash ^= ((size_t) ipvs >> 8);
|
|
return (proto ^ ahash ^ (porth >> IP_VS_SVC_TAB_BITS) ^ porth) &
|
IP_VS_SVC_TAB_MASK;
|
}
|
|
/*
|
* Returns hash value of fwmark for virtual service lookup
|
*/
|
static inline unsigned int ip_vs_svc_fwm_hashkey(struct netns_ipvs *ipvs, __u32 fwmark)
|
{
|
return (((size_t)ipvs>>8) ^ fwmark) & IP_VS_SVC_TAB_MASK;
|
}
|
|
/*
|
* Hashes a service in the ip_vs_svc_table by <netns,proto,addr,port>
|
* or in the ip_vs_svc_fwm_table by fwmark.
|
* Should be called with locked tables.
|
*/
|
static int ip_vs_svc_hash(struct ip_vs_service *svc)
|
{
|
unsigned int hash;
|
|
if (svc->flags & IP_VS_SVC_F_HASHED) {
|
pr_err("%s(): request for already hashed, called from %pS\n",
|
__func__, __builtin_return_address(0));
|
return 0;
|
}
|
|
if (svc->fwmark == 0) {
|
/*
|
* Hash it by <netns,protocol,addr,port> in ip_vs_svc_table
|
*/
|
hash = ip_vs_svc_hashkey(svc->ipvs, svc->af, svc->protocol,
|
&svc->addr, svc->port);
|
hlist_add_head_rcu(&svc->s_list, &ip_vs_svc_table[hash]);
|
} else {
|
/*
|
* Hash it by fwmark in svc_fwm_table
|
*/
|
hash = ip_vs_svc_fwm_hashkey(svc->ipvs, svc->fwmark);
|
hlist_add_head_rcu(&svc->f_list, &ip_vs_svc_fwm_table[hash]);
|
}
|
|
svc->flags |= IP_VS_SVC_F_HASHED;
|
/* increase its refcnt because it is referenced by the svc table */
|
atomic_inc(&svc->refcnt);
|
return 1;
|
}
|
|
|
/*
|
* Unhashes a service from svc_table / svc_fwm_table.
|
* Should be called with locked tables.
|
*/
|
static int ip_vs_svc_unhash(struct ip_vs_service *svc)
|
{
|
if (!(svc->flags & IP_VS_SVC_F_HASHED)) {
|
pr_err("%s(): request for unhash flagged, called from %pS\n",
|
__func__, __builtin_return_address(0));
|
return 0;
|
}
|
|
if (svc->fwmark == 0) {
|
/* Remove it from the svc_table table */
|
hlist_del_rcu(&svc->s_list);
|
} else {
|
/* Remove it from the svc_fwm_table table */
|
hlist_del_rcu(&svc->f_list);
|
}
|
|
svc->flags &= ~IP_VS_SVC_F_HASHED;
|
atomic_dec(&svc->refcnt);
|
return 1;
|
}
|
|
|
/*
|
* Get service by {netns, proto,addr,port} in the service table.
|
*/
|
static inline struct ip_vs_service *
|
__ip_vs_service_find(struct netns_ipvs *ipvs, int af, __u16 protocol,
|
const union nf_inet_addr *vaddr, __be16 vport)
|
{
|
unsigned int hash;
|
struct ip_vs_service *svc;
|
|
/* Check for "full" addressed entries */
|
hash = ip_vs_svc_hashkey(ipvs, af, protocol, vaddr, vport);
|
|
hlist_for_each_entry_rcu(svc, &ip_vs_svc_table[hash], s_list) {
|
if ((svc->af == af)
|
&& ip_vs_addr_equal(af, &svc->addr, vaddr)
|
&& (svc->port == vport)
|
&& (svc->protocol == protocol)
|
&& (svc->ipvs == ipvs)) {
|
/* HIT */
|
return svc;
|
}
|
}
|
|
return NULL;
|
}
|
|
|
/*
|
* Get service by {fwmark} in the service table.
|
*/
|
static inline struct ip_vs_service *
|
__ip_vs_svc_fwm_find(struct netns_ipvs *ipvs, int af, __u32 fwmark)
|
{
|
unsigned int hash;
|
struct ip_vs_service *svc;
|
|
/* Check for fwmark addressed entries */
|
hash = ip_vs_svc_fwm_hashkey(ipvs, fwmark);
|
|
hlist_for_each_entry_rcu(svc, &ip_vs_svc_fwm_table[hash], f_list) {
|
if (svc->fwmark == fwmark && svc->af == af
|
&& (svc->ipvs == ipvs)) {
|
/* HIT */
|
return svc;
|
}
|
}
|
|
return NULL;
|
}
|
|
/* Find service, called under RCU lock */
|
struct ip_vs_service *
|
ip_vs_service_find(struct netns_ipvs *ipvs, int af, __u32 fwmark, __u16 protocol,
|
const union nf_inet_addr *vaddr, __be16 vport)
|
{
|
struct ip_vs_service *svc;
|
|
/*
|
* Check the table hashed by fwmark first
|
*/
|
if (fwmark) {
|
svc = __ip_vs_svc_fwm_find(ipvs, af, fwmark);
|
if (svc)
|
goto out;
|
}
|
|
/*
|
* Check the table hashed by <protocol,addr,port>
|
* for "full" addressed entries
|
*/
|
svc = __ip_vs_service_find(ipvs, af, protocol, vaddr, vport);
|
|
if (!svc && protocol == IPPROTO_TCP &&
|
atomic_read(&ipvs->ftpsvc_counter) &&
|
(vport == FTPDATA || !inet_port_requires_bind_service(ipvs->net, ntohs(vport)))) {
|
/*
|
* Check if ftp service entry exists, the packet
|
* might belong to FTP data connections.
|
*/
|
svc = __ip_vs_service_find(ipvs, af, protocol, vaddr, FTPPORT);
|
}
|
|
if (svc == NULL
|
&& atomic_read(&ipvs->nullsvc_counter)) {
|
/*
|
* Check if the catch-all port (port zero) exists
|
*/
|
svc = __ip_vs_service_find(ipvs, af, protocol, vaddr, 0);
|
}
|
|
out:
|
IP_VS_DBG_BUF(9, "lookup service: fwm %u %s %s:%u %s\n",
|
fwmark, ip_vs_proto_name(protocol),
|
IP_VS_DBG_ADDR(af, vaddr), ntohs(vport),
|
svc ? "hit" : "not hit");
|
|
return svc;
|
}
|
|
|
static inline void
|
__ip_vs_bind_svc(struct ip_vs_dest *dest, struct ip_vs_service *svc)
|
{
|
atomic_inc(&svc->refcnt);
|
rcu_assign_pointer(dest->svc, svc);
|
}
|
|
static void ip_vs_service_free(struct ip_vs_service *svc)
|
{
|
free_percpu(svc->stats.cpustats);
|
kfree(svc);
|
}
|
|
static void ip_vs_service_rcu_free(struct rcu_head *head)
|
{
|
struct ip_vs_service *svc;
|
|
svc = container_of(head, struct ip_vs_service, rcu_head);
|
ip_vs_service_free(svc);
|
}
|
|
static void __ip_vs_svc_put(struct ip_vs_service *svc, bool do_delay)
|
{
|
if (atomic_dec_and_test(&svc->refcnt)) {
|
IP_VS_DBG_BUF(3, "Removing service %u/%s:%u\n",
|
svc->fwmark,
|
IP_VS_DBG_ADDR(svc->af, &svc->addr),
|
ntohs(svc->port));
|
if (do_delay)
|
call_rcu(&svc->rcu_head, ip_vs_service_rcu_free);
|
else
|
ip_vs_service_free(svc);
|
}
|
}
|
|
|
/*
|
* Returns hash value for real service
|
*/
|
static inline unsigned int ip_vs_rs_hashkey(int af,
|
const union nf_inet_addr *addr,
|
__be16 port)
|
{
|
unsigned int porth = ntohs(port);
|
__be32 addr_fold = addr->ip;
|
|
#ifdef CONFIG_IP_VS_IPV6
|
if (af == AF_INET6)
|
addr_fold = addr->ip6[0]^addr->ip6[1]^
|
addr->ip6[2]^addr->ip6[3];
|
#endif
|
|
return (ntohl(addr_fold)^(porth>>IP_VS_RTAB_BITS)^porth)
|
& IP_VS_RTAB_MASK;
|
}
|
|
/* Hash ip_vs_dest in rs_table by <proto,addr,port>. */
|
static void ip_vs_rs_hash(struct netns_ipvs *ipvs, struct ip_vs_dest *dest)
|
{
|
unsigned int hash;
|
__be16 port;
|
|
if (dest->in_rs_table)
|
return;
|
|
switch (IP_VS_DFWD_METHOD(dest)) {
|
case IP_VS_CONN_F_MASQ:
|
port = dest->port;
|
break;
|
case IP_VS_CONN_F_TUNNEL:
|
switch (dest->tun_type) {
|
case IP_VS_CONN_F_TUNNEL_TYPE_GUE:
|
port = dest->tun_port;
|
break;
|
case IP_VS_CONN_F_TUNNEL_TYPE_IPIP:
|
case IP_VS_CONN_F_TUNNEL_TYPE_GRE:
|
port = 0;
|
break;
|
default:
|
return;
|
}
|
break;
|
default:
|
return;
|
}
|
|
/*
|
* Hash by proto,addr,port,
|
* which are the parameters of the real service.
|
*/
|
hash = ip_vs_rs_hashkey(dest->af, &dest->addr, port);
|
|
hlist_add_head_rcu(&dest->d_list, &ipvs->rs_table[hash]);
|
dest->in_rs_table = 1;
|
}
|
|
/* Unhash ip_vs_dest from rs_table. */
|
static void ip_vs_rs_unhash(struct ip_vs_dest *dest)
|
{
|
/*
|
* Remove it from the rs_table table.
|
*/
|
if (dest->in_rs_table) {
|
hlist_del_rcu(&dest->d_list);
|
dest->in_rs_table = 0;
|
}
|
}
|
|
/* Check if real service by <proto,addr,port> is present */
|
bool ip_vs_has_real_service(struct netns_ipvs *ipvs, int af, __u16 protocol,
|
const union nf_inet_addr *daddr, __be16 dport)
|
{
|
unsigned int hash;
|
struct ip_vs_dest *dest;
|
|
/* Check for "full" addressed entries */
|
hash = ip_vs_rs_hashkey(af, daddr, dport);
|
|
hlist_for_each_entry_rcu(dest, &ipvs->rs_table[hash], d_list) {
|
if (dest->port == dport &&
|
dest->af == af &&
|
ip_vs_addr_equal(af, &dest->addr, daddr) &&
|
(dest->protocol == protocol || dest->vfwmark) &&
|
IP_VS_DFWD_METHOD(dest) == IP_VS_CONN_F_MASQ) {
|
/* HIT */
|
return true;
|
}
|
}
|
|
return false;
|
}
|
|
/* Find real service record by <proto,addr,port>.
|
* In case of multiple records with the same <proto,addr,port>, only
|
* the first found record is returned.
|
*
|
* To be called under RCU lock.
|
*/
|
struct ip_vs_dest *ip_vs_find_real_service(struct netns_ipvs *ipvs, int af,
|
__u16 protocol,
|
const union nf_inet_addr *daddr,
|
__be16 dport)
|
{
|
unsigned int hash;
|
struct ip_vs_dest *dest;
|
|
/* Check for "full" addressed entries */
|
hash = ip_vs_rs_hashkey(af, daddr, dport);
|
|
hlist_for_each_entry_rcu(dest, &ipvs->rs_table[hash], d_list) {
|
if (dest->port == dport &&
|
dest->af == af &&
|
ip_vs_addr_equal(af, &dest->addr, daddr) &&
|
(dest->protocol == protocol || dest->vfwmark) &&
|
IP_VS_DFWD_METHOD(dest) == IP_VS_CONN_F_MASQ) {
|
/* HIT */
|
return dest;
|
}
|
}
|
|
return NULL;
|
}
|
|
/* Find real service record by <af,addr,tun_port>.
|
* In case of multiple records with the same <af,addr,tun_port>, only
|
* the first found record is returned.
|
*
|
* To be called under RCU lock.
|
*/
|
struct ip_vs_dest *ip_vs_find_tunnel(struct netns_ipvs *ipvs, int af,
|
const union nf_inet_addr *daddr,
|
__be16 tun_port)
|
{
|
struct ip_vs_dest *dest;
|
unsigned int hash;
|
|
/* Check for "full" addressed entries */
|
hash = ip_vs_rs_hashkey(af, daddr, tun_port);
|
|
hlist_for_each_entry_rcu(dest, &ipvs->rs_table[hash], d_list) {
|
if (dest->tun_port == tun_port &&
|
dest->af == af &&
|
ip_vs_addr_equal(af, &dest->addr, daddr) &&
|
IP_VS_DFWD_METHOD(dest) == IP_VS_CONN_F_TUNNEL) {
|
/* HIT */
|
return dest;
|
}
|
}
|
|
return NULL;
|
}
|
|
/* Lookup destination by {addr,port} in the given service
|
* Called under RCU lock.
|
*/
|
static struct ip_vs_dest *
|
ip_vs_lookup_dest(struct ip_vs_service *svc, int dest_af,
|
const union nf_inet_addr *daddr, __be16 dport)
|
{
|
struct ip_vs_dest *dest;
|
|
/*
|
* Find the destination for the given service
|
*/
|
list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
|
if ((dest->af == dest_af) &&
|
ip_vs_addr_equal(dest_af, &dest->addr, daddr) &&
|
(dest->port == dport)) {
|
/* HIT */
|
return dest;
|
}
|
}
|
|
return NULL;
|
}
|
|
/*
|
* Find destination by {daddr,dport,vaddr,protocol}
|
* Created to be used in ip_vs_process_message() in
|
* the backup synchronization daemon. It finds the
|
* destination to be bound to the received connection
|
* on the backup.
|
* Called under RCU lock, no refcnt is returned.
|
*/
|
struct ip_vs_dest *ip_vs_find_dest(struct netns_ipvs *ipvs, int svc_af, int dest_af,
|
const union nf_inet_addr *daddr,
|
__be16 dport,
|
const union nf_inet_addr *vaddr,
|
__be16 vport, __u16 protocol, __u32 fwmark,
|
__u32 flags)
|
{
|
struct ip_vs_dest *dest;
|
struct ip_vs_service *svc;
|
__be16 port = dport;
|
|
svc = ip_vs_service_find(ipvs, svc_af, fwmark, protocol, vaddr, vport);
|
if (!svc)
|
return NULL;
|
if (fwmark && (flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ)
|
port = 0;
|
dest = ip_vs_lookup_dest(svc, dest_af, daddr, port);
|
if (!dest)
|
dest = ip_vs_lookup_dest(svc, dest_af, daddr, port ^ dport);
|
return dest;
|
}
|
|
void ip_vs_dest_dst_rcu_free(struct rcu_head *head)
|
{
|
struct ip_vs_dest_dst *dest_dst = container_of(head,
|
struct ip_vs_dest_dst,
|
rcu_head);
|
|
dst_release(dest_dst->dst_cache);
|
kfree(dest_dst);
|
}
|
|
/* Release dest_dst and dst_cache for dest in user context */
|
static void __ip_vs_dst_cache_reset(struct ip_vs_dest *dest)
|
{
|
struct ip_vs_dest_dst *old;
|
|
old = rcu_dereference_protected(dest->dest_dst, 1);
|
if (old) {
|
RCU_INIT_POINTER(dest->dest_dst, NULL);
|
call_rcu(&old->rcu_head, ip_vs_dest_dst_rcu_free);
|
}
|
}
|
|
/*
|
* Lookup dest by {svc,addr,port} in the destination trash.
|
* The destination trash is used to hold the destinations that are removed
|
* from the service table but are still referenced by some conn entries.
|
* The reason to add the destination trash is when the dest is temporary
|
* down (either by administrator or by monitor program), the dest can be
|
* picked back from the trash, the remaining connections to the dest can
|
* continue, and the counting information of the dest is also useful for
|
* scheduling.
|
*/
|
static struct ip_vs_dest *
|
ip_vs_trash_get_dest(struct ip_vs_service *svc, int dest_af,
|
const union nf_inet_addr *daddr, __be16 dport)
|
{
|
struct ip_vs_dest *dest;
|
struct netns_ipvs *ipvs = svc->ipvs;
|
|
/*
|
* Find the destination in trash
|
*/
|
spin_lock_bh(&ipvs->dest_trash_lock);
|
list_for_each_entry(dest, &ipvs->dest_trash, t_list) {
|
IP_VS_DBG_BUF(3, "Destination %u/%s:%u still in trash, "
|
"dest->refcnt=%d\n",
|
dest->vfwmark,
|
IP_VS_DBG_ADDR(dest->af, &dest->addr),
|
ntohs(dest->port),
|
refcount_read(&dest->refcnt));
|
if (dest->af == dest_af &&
|
ip_vs_addr_equal(dest_af, &dest->addr, daddr) &&
|
dest->port == dport &&
|
dest->vfwmark == svc->fwmark &&
|
dest->protocol == svc->protocol &&
|
(svc->fwmark ||
|
(ip_vs_addr_equal(svc->af, &dest->vaddr, &svc->addr) &&
|
dest->vport == svc->port))) {
|
/* HIT */
|
list_del(&dest->t_list);
|
goto out;
|
}
|
}
|
|
dest = NULL;
|
|
out:
|
spin_unlock_bh(&ipvs->dest_trash_lock);
|
|
return dest;
|
}
|
|
static void ip_vs_dest_free(struct ip_vs_dest *dest)
|
{
|
struct ip_vs_service *svc = rcu_dereference_protected(dest->svc, 1);
|
|
__ip_vs_dst_cache_reset(dest);
|
__ip_vs_svc_put(svc, false);
|
free_percpu(dest->stats.cpustats);
|
ip_vs_dest_put_and_free(dest);
|
}
|
|
/*
|
* Clean up all the destinations in the trash
|
* Called by the ip_vs_control_cleanup()
|
*
|
* When the ip_vs_control_clearup is activated by ipvs module exit,
|
* the service tables must have been flushed and all the connections
|
* are expired, and the refcnt of each destination in the trash must
|
* be 1, so we simply release them here.
|
*/
|
static void ip_vs_trash_cleanup(struct netns_ipvs *ipvs)
|
{
|
struct ip_vs_dest *dest, *nxt;
|
|
del_timer_sync(&ipvs->dest_trash_timer);
|
/* No need to use dest_trash_lock */
|
list_for_each_entry_safe(dest, nxt, &ipvs->dest_trash, t_list) {
|
list_del(&dest->t_list);
|
ip_vs_dest_free(dest);
|
}
|
}
|
|
static void
|
ip_vs_copy_stats(struct ip_vs_kstats *dst, struct ip_vs_stats *src)
|
{
|
#define IP_VS_SHOW_STATS_COUNTER(c) dst->c = src->kstats.c - src->kstats0.c
|
|
spin_lock_bh(&src->lock);
|
|
IP_VS_SHOW_STATS_COUNTER(conns);
|
IP_VS_SHOW_STATS_COUNTER(inpkts);
|
IP_VS_SHOW_STATS_COUNTER(outpkts);
|
IP_VS_SHOW_STATS_COUNTER(inbytes);
|
IP_VS_SHOW_STATS_COUNTER(outbytes);
|
|
ip_vs_read_estimator(dst, src);
|
|
spin_unlock_bh(&src->lock);
|
}
|
|
static void
|
ip_vs_export_stats_user(struct ip_vs_stats_user *dst, struct ip_vs_kstats *src)
|
{
|
dst->conns = (u32)src->conns;
|
dst->inpkts = (u32)src->inpkts;
|
dst->outpkts = (u32)src->outpkts;
|
dst->inbytes = src->inbytes;
|
dst->outbytes = src->outbytes;
|
dst->cps = (u32)src->cps;
|
dst->inpps = (u32)src->inpps;
|
dst->outpps = (u32)src->outpps;
|
dst->inbps = (u32)src->inbps;
|
dst->outbps = (u32)src->outbps;
|
}
|
|
static void
|
ip_vs_zero_stats(struct ip_vs_stats *stats)
|
{
|
spin_lock_bh(&stats->lock);
|
|
/* get current counters as zero point, rates are zeroed */
|
|
#define IP_VS_ZERO_STATS_COUNTER(c) stats->kstats0.c = stats->kstats.c
|
|
IP_VS_ZERO_STATS_COUNTER(conns);
|
IP_VS_ZERO_STATS_COUNTER(inpkts);
|
IP_VS_ZERO_STATS_COUNTER(outpkts);
|
IP_VS_ZERO_STATS_COUNTER(inbytes);
|
IP_VS_ZERO_STATS_COUNTER(outbytes);
|
|
ip_vs_zero_estimator(stats);
|
|
spin_unlock_bh(&stats->lock);
|
}
|
|
/*
|
* Update a destination in the given service
|
*/
|
static void
|
__ip_vs_update_dest(struct ip_vs_service *svc, struct ip_vs_dest *dest,
|
struct ip_vs_dest_user_kern *udest, int add)
|
{
|
struct netns_ipvs *ipvs = svc->ipvs;
|
struct ip_vs_service *old_svc;
|
struct ip_vs_scheduler *sched;
|
int conn_flags;
|
|
/* We cannot modify an address and change the address family */
|
BUG_ON(!add && udest->af != dest->af);
|
|
if (add && udest->af != svc->af)
|
ipvs->mixed_address_family_dests++;
|
|
/* keep the last_weight with latest non-0 weight */
|
if (add || udest->weight != 0)
|
atomic_set(&dest->last_weight, udest->weight);
|
|
/* set the weight and the flags */
|
atomic_set(&dest->weight, udest->weight);
|
conn_flags = udest->conn_flags & IP_VS_CONN_F_DEST_MASK;
|
conn_flags |= IP_VS_CONN_F_INACTIVE;
|
|
/* Need to rehash? */
|
if ((udest->conn_flags & IP_VS_CONN_F_FWD_MASK) !=
|
IP_VS_DFWD_METHOD(dest) ||
|
udest->tun_type != dest->tun_type ||
|
udest->tun_port != dest->tun_port)
|
ip_vs_rs_unhash(dest);
|
|
/* set the tunnel info */
|
dest->tun_type = udest->tun_type;
|
dest->tun_port = udest->tun_port;
|
dest->tun_flags = udest->tun_flags;
|
|
/* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */
|
if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ) {
|
conn_flags |= IP_VS_CONN_F_NOOUTPUT;
|
} else {
|
/* FTP-NAT requires conntrack for mangling */
|
if (svc->port == FTPPORT)
|
ip_vs_register_conntrack(svc);
|
}
|
atomic_set(&dest->conn_flags, conn_flags);
|
/* Put the real service in rs_table if not present. */
|
ip_vs_rs_hash(ipvs, dest);
|
|
/* bind the service */
|
old_svc = rcu_dereference_protected(dest->svc, 1);
|
if (!old_svc) {
|
__ip_vs_bind_svc(dest, svc);
|
} else {
|
if (old_svc != svc) {
|
ip_vs_zero_stats(&dest->stats);
|
__ip_vs_bind_svc(dest, svc);
|
__ip_vs_svc_put(old_svc, true);
|
}
|
}
|
|
/* set the dest status flags */
|
dest->flags |= IP_VS_DEST_F_AVAILABLE;
|
|
if (udest->u_threshold == 0 || udest->u_threshold > dest->u_threshold)
|
dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
|
dest->u_threshold = udest->u_threshold;
|
dest->l_threshold = udest->l_threshold;
|
|
dest->af = udest->af;
|
|
spin_lock_bh(&dest->dst_lock);
|
__ip_vs_dst_cache_reset(dest);
|
spin_unlock_bh(&dest->dst_lock);
|
|
if (add) {
|
ip_vs_start_estimator(svc->ipvs, &dest->stats);
|
list_add_rcu(&dest->n_list, &svc->destinations);
|
svc->num_dests++;
|
sched = rcu_dereference_protected(svc->scheduler, 1);
|
if (sched && sched->add_dest)
|
sched->add_dest(svc, dest);
|
} else {
|
sched = rcu_dereference_protected(svc->scheduler, 1);
|
if (sched && sched->upd_dest)
|
sched->upd_dest(svc, dest);
|
}
|
}
|
|
|
/*
|
* Create a destination for the given service
|
*/
|
static int
|
ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest,
|
struct ip_vs_dest **dest_p)
|
{
|
struct ip_vs_dest *dest;
|
unsigned int atype, i;
|
|
EnterFunction(2);
|
|
#ifdef CONFIG_IP_VS_IPV6
|
if (udest->af == AF_INET6) {
|
int ret;
|
|
atype = ipv6_addr_type(&udest->addr.in6);
|
if ((!(atype & IPV6_ADDR_UNICAST) ||
|
atype & IPV6_ADDR_LINKLOCAL) &&
|
!__ip_vs_addr_is_local_v6(svc->ipvs->net, &udest->addr.in6))
|
return -EINVAL;
|
|
ret = nf_defrag_ipv6_enable(svc->ipvs->net);
|
if (ret)
|
return ret;
|
} else
|
#endif
|
{
|
atype = inet_addr_type(svc->ipvs->net, udest->addr.ip);
|
if (atype != RTN_LOCAL && atype != RTN_UNICAST)
|
return -EINVAL;
|
}
|
|
dest = kzalloc(sizeof(struct ip_vs_dest), GFP_KERNEL);
|
if (dest == NULL)
|
return -ENOMEM;
|
|
dest->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
|
if (!dest->stats.cpustats)
|
goto err_alloc;
|
|
for_each_possible_cpu(i) {
|
struct ip_vs_cpu_stats *ip_vs_dest_stats;
|
ip_vs_dest_stats = per_cpu_ptr(dest->stats.cpustats, i);
|
u64_stats_init(&ip_vs_dest_stats->syncp);
|
}
|
|
dest->af = udest->af;
|
dest->protocol = svc->protocol;
|
dest->vaddr = svc->addr;
|
dest->vport = svc->port;
|
dest->vfwmark = svc->fwmark;
|
ip_vs_addr_copy(udest->af, &dest->addr, &udest->addr);
|
dest->port = udest->port;
|
|
atomic_set(&dest->activeconns, 0);
|
atomic_set(&dest->inactconns, 0);
|
atomic_set(&dest->persistconns, 0);
|
refcount_set(&dest->refcnt, 1);
|
|
INIT_HLIST_NODE(&dest->d_list);
|
spin_lock_init(&dest->dst_lock);
|
spin_lock_init(&dest->stats.lock);
|
__ip_vs_update_dest(svc, dest, udest, 1);
|
|
*dest_p = dest;
|
|
LeaveFunction(2);
|
return 0;
|
|
err_alloc:
|
kfree(dest);
|
return -ENOMEM;
|
}
|
|
|
/*
|
* Add a destination into an existing service
|
*/
|
static int
|
ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
|
{
|
struct ip_vs_dest *dest;
|
union nf_inet_addr daddr;
|
__be16 dport = udest->port;
|
int ret;
|
|
EnterFunction(2);
|
|
if (udest->weight < 0) {
|
pr_err("%s(): server weight less than zero\n", __func__);
|
return -ERANGE;
|
}
|
|
if (udest->l_threshold > udest->u_threshold) {
|
pr_err("%s(): lower threshold is higher than upper threshold\n",
|
__func__);
|
return -ERANGE;
|
}
|
|
if (udest->tun_type == IP_VS_CONN_F_TUNNEL_TYPE_GUE) {
|
if (udest->tun_port == 0) {
|
pr_err("%s(): tunnel port is zero\n", __func__);
|
return -EINVAL;
|
}
|
}
|
|
ip_vs_addr_copy(udest->af, &daddr, &udest->addr);
|
|
/* We use function that requires RCU lock */
|
rcu_read_lock();
|
dest = ip_vs_lookup_dest(svc, udest->af, &daddr, dport);
|
rcu_read_unlock();
|
|
if (dest != NULL) {
|
IP_VS_DBG(1, "%s(): dest already exists\n", __func__);
|
return -EEXIST;
|
}
|
|
/*
|
* Check if the dest already exists in the trash and
|
* is from the same service
|
*/
|
dest = ip_vs_trash_get_dest(svc, udest->af, &daddr, dport);
|
|
if (dest != NULL) {
|
IP_VS_DBG_BUF(3, "Get destination %s:%u from trash, "
|
"dest->refcnt=%d, service %u/%s:%u\n",
|
IP_VS_DBG_ADDR(udest->af, &daddr), ntohs(dport),
|
refcount_read(&dest->refcnt),
|
dest->vfwmark,
|
IP_VS_DBG_ADDR(svc->af, &dest->vaddr),
|
ntohs(dest->vport));
|
|
__ip_vs_update_dest(svc, dest, udest, 1);
|
ret = 0;
|
} else {
|
/*
|
* Allocate and initialize the dest structure
|
*/
|
ret = ip_vs_new_dest(svc, udest, &dest);
|
}
|
LeaveFunction(2);
|
|
return ret;
|
}
|
|
|
/*
|
* Edit a destination in the given service
|
*/
|
static int
|
ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
|
{
|
struct ip_vs_dest *dest;
|
union nf_inet_addr daddr;
|
__be16 dport = udest->port;
|
|
EnterFunction(2);
|
|
if (udest->weight < 0) {
|
pr_err("%s(): server weight less than zero\n", __func__);
|
return -ERANGE;
|
}
|
|
if (udest->l_threshold > udest->u_threshold) {
|
pr_err("%s(): lower threshold is higher than upper threshold\n",
|
__func__);
|
return -ERANGE;
|
}
|
|
if (udest->tun_type == IP_VS_CONN_F_TUNNEL_TYPE_GUE) {
|
if (udest->tun_port == 0) {
|
pr_err("%s(): tunnel port is zero\n", __func__);
|
return -EINVAL;
|
}
|
}
|
|
ip_vs_addr_copy(udest->af, &daddr, &udest->addr);
|
|
/* We use function that requires RCU lock */
|
rcu_read_lock();
|
dest = ip_vs_lookup_dest(svc, udest->af, &daddr, dport);
|
rcu_read_unlock();
|
|
if (dest == NULL) {
|
IP_VS_DBG(1, "%s(): dest doesn't exist\n", __func__);
|
return -ENOENT;
|
}
|
|
__ip_vs_update_dest(svc, dest, udest, 0);
|
LeaveFunction(2);
|
|
return 0;
|
}
|
|
/*
|
* Delete a destination (must be already unlinked from the service)
|
*/
|
static void __ip_vs_del_dest(struct netns_ipvs *ipvs, struct ip_vs_dest *dest,
|
bool cleanup)
|
{
|
ip_vs_stop_estimator(ipvs, &dest->stats);
|
|
/*
|
* Remove it from the d-linked list with the real services.
|
*/
|
ip_vs_rs_unhash(dest);
|
|
spin_lock_bh(&ipvs->dest_trash_lock);
|
IP_VS_DBG_BUF(3, "Moving dest %s:%u into trash, dest->refcnt=%d\n",
|
IP_VS_DBG_ADDR(dest->af, &dest->addr), ntohs(dest->port),
|
refcount_read(&dest->refcnt));
|
if (list_empty(&ipvs->dest_trash) && !cleanup)
|
mod_timer(&ipvs->dest_trash_timer,
|
jiffies + (IP_VS_DEST_TRASH_PERIOD >> 1));
|
/* dest lives in trash with reference */
|
list_add(&dest->t_list, &ipvs->dest_trash);
|
dest->idle_start = 0;
|
spin_unlock_bh(&ipvs->dest_trash_lock);
|
|
/* Queue up delayed work to expire all no destination connections.
|
* No-op when CONFIG_SYSCTL is disabled.
|
*/
|
if (!cleanup)
|
ip_vs_enqueue_expire_nodest_conns(ipvs);
|
}
|
|
|
/*
|
* Unlink a destination from the given service
|
*/
|
static void __ip_vs_unlink_dest(struct ip_vs_service *svc,
|
struct ip_vs_dest *dest,
|
int svcupd)
|
{
|
dest->flags &= ~IP_VS_DEST_F_AVAILABLE;
|
|
/*
|
* Remove it from the d-linked destination list.
|
*/
|
list_del_rcu(&dest->n_list);
|
svc->num_dests--;
|
|
if (dest->af != svc->af)
|
svc->ipvs->mixed_address_family_dests--;
|
|
if (svcupd) {
|
struct ip_vs_scheduler *sched;
|
|
sched = rcu_dereference_protected(svc->scheduler, 1);
|
if (sched && sched->del_dest)
|
sched->del_dest(svc, dest);
|
}
|
}
|
|
|
/*
|
* Delete a destination server in the given service
|
*/
|
static int
|
ip_vs_del_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
|
{
|
struct ip_vs_dest *dest;
|
__be16 dport = udest->port;
|
|
EnterFunction(2);
|
|
/* We use function that requires RCU lock */
|
rcu_read_lock();
|
dest = ip_vs_lookup_dest(svc, udest->af, &udest->addr, dport);
|
rcu_read_unlock();
|
|
if (dest == NULL) {
|
IP_VS_DBG(1, "%s(): destination not found!\n", __func__);
|
return -ENOENT;
|
}
|
|
/*
|
* Unlink dest from the service
|
*/
|
__ip_vs_unlink_dest(svc, dest, 1);
|
|
/*
|
* Delete the destination
|
*/
|
__ip_vs_del_dest(svc->ipvs, dest, false);
|
|
LeaveFunction(2);
|
|
return 0;
|
}
|
|
static void ip_vs_dest_trash_expire(struct timer_list *t)
|
{
|
struct netns_ipvs *ipvs = from_timer(ipvs, t, dest_trash_timer);
|
struct ip_vs_dest *dest, *next;
|
unsigned long now = jiffies;
|
|
spin_lock(&ipvs->dest_trash_lock);
|
list_for_each_entry_safe(dest, next, &ipvs->dest_trash, t_list) {
|
if (refcount_read(&dest->refcnt) > 1)
|
continue;
|
if (dest->idle_start) {
|
if (time_before(now, dest->idle_start +
|
IP_VS_DEST_TRASH_PERIOD))
|
continue;
|
} else {
|
dest->idle_start = max(1UL, now);
|
continue;
|
}
|
IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u from trash\n",
|
dest->vfwmark,
|
IP_VS_DBG_ADDR(dest->af, &dest->addr),
|
ntohs(dest->port));
|
list_del(&dest->t_list);
|
ip_vs_dest_free(dest);
|
}
|
if (!list_empty(&ipvs->dest_trash))
|
mod_timer(&ipvs->dest_trash_timer,
|
jiffies + (IP_VS_DEST_TRASH_PERIOD >> 1));
|
spin_unlock(&ipvs->dest_trash_lock);
|
}
|
|
/*
|
* Add a service into the service hash table
|
*/
|
static int
|
ip_vs_add_service(struct netns_ipvs *ipvs, struct ip_vs_service_user_kern *u,
|
struct ip_vs_service **svc_p)
|
{
|
int ret = 0, i;
|
struct ip_vs_scheduler *sched = NULL;
|
struct ip_vs_pe *pe = NULL;
|
struct ip_vs_service *svc = NULL;
|
int ret_hooks = -1;
|
|
/* increase the module use count */
|
if (!ip_vs_use_count_inc())
|
return -ENOPROTOOPT;
|
|
/* Lookup the scheduler by 'u->sched_name' */
|
if (strcmp(u->sched_name, "none")) {
|
sched = ip_vs_scheduler_get(u->sched_name);
|
if (!sched) {
|
pr_info("Scheduler module ip_vs_%s not found\n",
|
u->sched_name);
|
ret = -ENOENT;
|
goto out_err;
|
}
|
}
|
|
if (u->pe_name && *u->pe_name) {
|
pe = ip_vs_pe_getbyname(u->pe_name);
|
if (pe == NULL) {
|
pr_info("persistence engine module ip_vs_pe_%s "
|
"not found\n", u->pe_name);
|
ret = -ENOENT;
|
goto out_err;
|
}
|
}
|
|
#ifdef CONFIG_IP_VS_IPV6
|
if (u->af == AF_INET6) {
|
__u32 plen = (__force __u32) u->netmask;
|
|
if (plen < 1 || plen > 128) {
|
ret = -EINVAL;
|
goto out_err;
|
}
|
|
ret = nf_defrag_ipv6_enable(ipvs->net);
|
if (ret)
|
goto out_err;
|
}
|
#endif
|
|
if ((u->af == AF_INET && !ipvs->num_services) ||
|
(u->af == AF_INET6 && !ipvs->num_services6)) {
|
ret = ip_vs_register_hooks(ipvs, u->af);
|
if (ret < 0)
|
goto out_err;
|
ret_hooks = ret;
|
}
|
|
svc = kzalloc(sizeof(struct ip_vs_service), GFP_KERNEL);
|
if (svc == NULL) {
|
IP_VS_DBG(1, "%s(): no memory\n", __func__);
|
ret = -ENOMEM;
|
goto out_err;
|
}
|
svc->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
|
if (!svc->stats.cpustats) {
|
ret = -ENOMEM;
|
goto out_err;
|
}
|
|
for_each_possible_cpu(i) {
|
struct ip_vs_cpu_stats *ip_vs_stats;
|
ip_vs_stats = per_cpu_ptr(svc->stats.cpustats, i);
|
u64_stats_init(&ip_vs_stats->syncp);
|
}
|
|
|
/* I'm the first user of the service */
|
atomic_set(&svc->refcnt, 0);
|
|
svc->af = u->af;
|
svc->protocol = u->protocol;
|
ip_vs_addr_copy(svc->af, &svc->addr, &u->addr);
|
svc->port = u->port;
|
svc->fwmark = u->fwmark;
|
svc->flags = u->flags & ~IP_VS_SVC_F_HASHED;
|
svc->timeout = u->timeout * HZ;
|
svc->netmask = u->netmask;
|
svc->ipvs = ipvs;
|
|
INIT_LIST_HEAD(&svc->destinations);
|
spin_lock_init(&svc->sched_lock);
|
spin_lock_init(&svc->stats.lock);
|
|
/* Bind the scheduler */
|
if (sched) {
|
ret = ip_vs_bind_scheduler(svc, sched);
|
if (ret)
|
goto out_err;
|
sched = NULL;
|
}
|
|
/* Bind the ct retriever */
|
RCU_INIT_POINTER(svc->pe, pe);
|
pe = NULL;
|
|
/* Update the virtual service counters */
|
if (svc->port == FTPPORT)
|
atomic_inc(&ipvs->ftpsvc_counter);
|
else if (svc->port == 0)
|
atomic_inc(&ipvs->nullsvc_counter);
|
if (svc->pe && svc->pe->conn_out)
|
atomic_inc(&ipvs->conn_out_counter);
|
|
ip_vs_start_estimator(ipvs, &svc->stats);
|
|
/* Count only IPv4 services for old get/setsockopt interface */
|
if (svc->af == AF_INET)
|
ipvs->num_services++;
|
else if (svc->af == AF_INET6)
|
ipvs->num_services6++;
|
|
/* Hash the service into the service table */
|
ip_vs_svc_hash(svc);
|
|
*svc_p = svc;
|
/* Now there is a service - full throttle */
|
ipvs->enable = 1;
|
return 0;
|
|
|
out_err:
|
if (ret_hooks >= 0)
|
ip_vs_unregister_hooks(ipvs, u->af);
|
if (svc != NULL) {
|
ip_vs_unbind_scheduler(svc, sched);
|
ip_vs_service_free(svc);
|
}
|
ip_vs_scheduler_put(sched);
|
ip_vs_pe_put(pe);
|
|
/* decrease the module use count */
|
ip_vs_use_count_dec();
|
|
return ret;
|
}
|
|
|
/*
|
* Edit a service and bind it with a new scheduler
|
*/
|
static int
|
ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user_kern *u)
|
{
|
struct ip_vs_scheduler *sched = NULL, *old_sched;
|
struct ip_vs_pe *pe = NULL, *old_pe = NULL;
|
int ret = 0;
|
bool new_pe_conn_out, old_pe_conn_out;
|
|
/*
|
* Lookup the scheduler, by 'u->sched_name'
|
*/
|
if (strcmp(u->sched_name, "none")) {
|
sched = ip_vs_scheduler_get(u->sched_name);
|
if (!sched) {
|
pr_info("Scheduler module ip_vs_%s not found\n",
|
u->sched_name);
|
return -ENOENT;
|
}
|
}
|
old_sched = sched;
|
|
if (u->pe_name && *u->pe_name) {
|
pe = ip_vs_pe_getbyname(u->pe_name);
|
if (pe == NULL) {
|
pr_info("persistence engine module ip_vs_pe_%s "
|
"not found\n", u->pe_name);
|
ret = -ENOENT;
|
goto out;
|
}
|
old_pe = pe;
|
}
|
|
#ifdef CONFIG_IP_VS_IPV6
|
if (u->af == AF_INET6) {
|
__u32 plen = (__force __u32) u->netmask;
|
|
if (plen < 1 || plen > 128) {
|
ret = -EINVAL;
|
goto out;
|
}
|
}
|
#endif
|
|
old_sched = rcu_dereference_protected(svc->scheduler, 1);
|
if (sched != old_sched) {
|
if (old_sched) {
|
ip_vs_unbind_scheduler(svc, old_sched);
|
RCU_INIT_POINTER(svc->scheduler, NULL);
|
/* Wait all svc->sched_data users */
|
synchronize_rcu();
|
}
|
/* Bind the new scheduler */
|
if (sched) {
|
ret = ip_vs_bind_scheduler(svc, sched);
|
if (ret) {
|
ip_vs_scheduler_put(sched);
|
goto out;
|
}
|
}
|
}
|
|
/*
|
* Set the flags and timeout value
|
*/
|
svc->flags = u->flags | IP_VS_SVC_F_HASHED;
|
svc->timeout = u->timeout * HZ;
|
svc->netmask = u->netmask;
|
|
old_pe = rcu_dereference_protected(svc->pe, 1);
|
if (pe != old_pe) {
|
rcu_assign_pointer(svc->pe, pe);
|
/* check for optional methods in new pe */
|
new_pe_conn_out = (pe && pe->conn_out) ? true : false;
|
old_pe_conn_out = (old_pe && old_pe->conn_out) ? true : false;
|
if (new_pe_conn_out && !old_pe_conn_out)
|
atomic_inc(&svc->ipvs->conn_out_counter);
|
if (old_pe_conn_out && !new_pe_conn_out)
|
atomic_dec(&svc->ipvs->conn_out_counter);
|
}
|
|
out:
|
ip_vs_scheduler_put(old_sched);
|
ip_vs_pe_put(old_pe);
|
return ret;
|
}
|
|
/*
|
* Delete a service from the service list
|
* - The service must be unlinked, unlocked and not referenced!
|
* - We are called under _bh lock
|
*/
|
static void __ip_vs_del_service(struct ip_vs_service *svc, bool cleanup)
|
{
|
struct ip_vs_dest *dest, *nxt;
|
struct ip_vs_scheduler *old_sched;
|
struct ip_vs_pe *old_pe;
|
struct netns_ipvs *ipvs = svc->ipvs;
|
|
if (svc->af == AF_INET) {
|
ipvs->num_services--;
|
if (!ipvs->num_services)
|
ip_vs_unregister_hooks(ipvs, svc->af);
|
} else if (svc->af == AF_INET6) {
|
ipvs->num_services6--;
|
if (!ipvs->num_services6)
|
ip_vs_unregister_hooks(ipvs, svc->af);
|
}
|
|
ip_vs_stop_estimator(svc->ipvs, &svc->stats);
|
|
/* Unbind scheduler */
|
old_sched = rcu_dereference_protected(svc->scheduler, 1);
|
ip_vs_unbind_scheduler(svc, old_sched);
|
ip_vs_scheduler_put(old_sched);
|
|
/* Unbind persistence engine, keep svc->pe */
|
old_pe = rcu_dereference_protected(svc->pe, 1);
|
if (old_pe && old_pe->conn_out)
|
atomic_dec(&ipvs->conn_out_counter);
|
ip_vs_pe_put(old_pe);
|
|
/*
|
* Unlink the whole destination list
|
*/
|
list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) {
|
__ip_vs_unlink_dest(svc, dest, 0);
|
__ip_vs_del_dest(svc->ipvs, dest, cleanup);
|
}
|
|
/*
|
* Update the virtual service counters
|
*/
|
if (svc->port == FTPPORT)
|
atomic_dec(&ipvs->ftpsvc_counter);
|
else if (svc->port == 0)
|
atomic_dec(&ipvs->nullsvc_counter);
|
|
/*
|
* Free the service if nobody refers to it
|
*/
|
__ip_vs_svc_put(svc, true);
|
|
/* decrease the module use count */
|
ip_vs_use_count_dec();
|
}
|
|
/*
|
* Unlink a service from list and try to delete it if its refcnt reached 0
|
*/
|
static void ip_vs_unlink_service(struct ip_vs_service *svc, bool cleanup)
|
{
|
ip_vs_unregister_conntrack(svc);
|
/* Hold svc to avoid double release from dest_trash */
|
atomic_inc(&svc->refcnt);
|
/*
|
* Unhash it from the service table
|
*/
|
ip_vs_svc_unhash(svc);
|
|
__ip_vs_del_service(svc, cleanup);
|
}
|
|
/*
|
* Delete a service from the service list
|
*/
|
static int ip_vs_del_service(struct ip_vs_service *svc)
|
{
|
if (svc == NULL)
|
return -EEXIST;
|
ip_vs_unlink_service(svc, false);
|
|
return 0;
|
}
|
|
|
/*
|
* Flush all the virtual services
|
*/
|
static int ip_vs_flush(struct netns_ipvs *ipvs, bool cleanup)
|
{
|
int idx;
|
struct ip_vs_service *svc;
|
struct hlist_node *n;
|
|
/*
|
* Flush the service table hashed by <netns,protocol,addr,port>
|
*/
|
for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
|
hlist_for_each_entry_safe(svc, n, &ip_vs_svc_table[idx],
|
s_list) {
|
if (svc->ipvs == ipvs)
|
ip_vs_unlink_service(svc, cleanup);
|
}
|
}
|
|
/*
|
* Flush the service table hashed by fwmark
|
*/
|
for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
|
hlist_for_each_entry_safe(svc, n, &ip_vs_svc_fwm_table[idx],
|
f_list) {
|
if (svc->ipvs == ipvs)
|
ip_vs_unlink_service(svc, cleanup);
|
}
|
}
|
|
return 0;
|
}
|
|
/*
|
* Delete service by {netns} in the service table.
|
* Called by __ip_vs_batch_cleanup()
|
*/
|
void ip_vs_service_nets_cleanup(struct list_head *net_list)
|
{
|
struct netns_ipvs *ipvs;
|
struct net *net;
|
|
EnterFunction(2);
|
/* Check for "full" addressed entries */
|
mutex_lock(&__ip_vs_mutex);
|
list_for_each_entry(net, net_list, exit_list) {
|
ipvs = net_ipvs(net);
|
ip_vs_flush(ipvs, true);
|
}
|
mutex_unlock(&__ip_vs_mutex);
|
LeaveFunction(2);
|
}
|
|
/* Put all references for device (dst_cache) */
|
static inline void
|
ip_vs_forget_dev(struct ip_vs_dest *dest, struct net_device *dev)
|
{
|
struct ip_vs_dest_dst *dest_dst;
|
|
spin_lock_bh(&dest->dst_lock);
|
dest_dst = rcu_dereference_protected(dest->dest_dst, 1);
|
if (dest_dst && dest_dst->dst_cache->dev == dev) {
|
IP_VS_DBG_BUF(3, "Reset dev:%s dest %s:%u ,dest->refcnt=%d\n",
|
dev->name,
|
IP_VS_DBG_ADDR(dest->af, &dest->addr),
|
ntohs(dest->port),
|
refcount_read(&dest->refcnt));
|
__ip_vs_dst_cache_reset(dest);
|
}
|
spin_unlock_bh(&dest->dst_lock);
|
|
}
|
/* Netdev event receiver
|
* Currently only NETDEV_DOWN is handled to release refs to cached dsts
|
*/
|
static int ip_vs_dst_event(struct notifier_block *this, unsigned long event,
|
void *ptr)
|
{
|
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
|
struct net *net = dev_net(dev);
|
struct netns_ipvs *ipvs = net_ipvs(net);
|
struct ip_vs_service *svc;
|
struct ip_vs_dest *dest;
|
unsigned int idx;
|
|
if (event != NETDEV_DOWN || !ipvs)
|
return NOTIFY_DONE;
|
IP_VS_DBG(3, "%s() dev=%s\n", __func__, dev->name);
|
EnterFunction(2);
|
mutex_lock(&__ip_vs_mutex);
|
for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
|
hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
|
if (svc->ipvs == ipvs) {
|
list_for_each_entry(dest, &svc->destinations,
|
n_list) {
|
ip_vs_forget_dev(dest, dev);
|
}
|
}
|
}
|
|
hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
|
if (svc->ipvs == ipvs) {
|
list_for_each_entry(dest, &svc->destinations,
|
n_list) {
|
ip_vs_forget_dev(dest, dev);
|
}
|
}
|
|
}
|
}
|
|
spin_lock_bh(&ipvs->dest_trash_lock);
|
list_for_each_entry(dest, &ipvs->dest_trash, t_list) {
|
ip_vs_forget_dev(dest, dev);
|
}
|
spin_unlock_bh(&ipvs->dest_trash_lock);
|
mutex_unlock(&__ip_vs_mutex);
|
LeaveFunction(2);
|
return NOTIFY_DONE;
|
}
|
|
/*
|
* Zero counters in a service or all services
|
*/
|
static int ip_vs_zero_service(struct ip_vs_service *svc)
|
{
|
struct ip_vs_dest *dest;
|
|
list_for_each_entry(dest, &svc->destinations, n_list) {
|
ip_vs_zero_stats(&dest->stats);
|
}
|
ip_vs_zero_stats(&svc->stats);
|
return 0;
|
}
|
|
static int ip_vs_zero_all(struct netns_ipvs *ipvs)
|
{
|
int idx;
|
struct ip_vs_service *svc;
|
|
for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
|
hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
|
if (svc->ipvs == ipvs)
|
ip_vs_zero_service(svc);
|
}
|
}
|
|
for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
|
hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
|
if (svc->ipvs == ipvs)
|
ip_vs_zero_service(svc);
|
}
|
}
|
|
ip_vs_zero_stats(&ipvs->tot_stats);
|
return 0;
|
}
|
|
#ifdef CONFIG_SYSCTL
|
|
static int three = 3;
|
|
static int
|
proc_do_defense_mode(struct ctl_table *table, int write,
|
void *buffer, size_t *lenp, loff_t *ppos)
|
{
|
struct netns_ipvs *ipvs = table->extra2;
|
int *valp = table->data;
|
int val = *valp;
|
int rc;
|
|
struct ctl_table tmp = {
|
.data = &val,
|
.maxlen = sizeof(int),
|
.mode = table->mode,
|
};
|
|
rc = proc_dointvec(&tmp, write, buffer, lenp, ppos);
|
if (write && (*valp != val)) {
|
if (val < 0 || val > 3) {
|
rc = -EINVAL;
|
} else {
|
*valp = val;
|
update_defense_level(ipvs);
|
}
|
}
|
return rc;
|
}
|
|
static int
|
proc_do_sync_threshold(struct ctl_table *table, int write,
|
void *buffer, size_t *lenp, loff_t *ppos)
|
{
|
struct netns_ipvs *ipvs = table->extra2;
|
int *valp = table->data;
|
int val[2];
|
int rc;
|
struct ctl_table tmp = {
|
.data = &val,
|
.maxlen = table->maxlen,
|
.mode = table->mode,
|
};
|
|
mutex_lock(&ipvs->sync_mutex);
|
memcpy(val, valp, sizeof(val));
|
rc = proc_dointvec(&tmp, write, buffer, lenp, ppos);
|
if (write) {
|
if (val[0] < 0 || val[1] < 0 ||
|
(val[0] >= val[1] && val[1]))
|
rc = -EINVAL;
|
else
|
memcpy(valp, val, sizeof(val));
|
}
|
mutex_unlock(&ipvs->sync_mutex);
|
return rc;
|
}
|
|
static int
|
proc_do_sync_ports(struct ctl_table *table, int write,
|
void *buffer, size_t *lenp, loff_t *ppos)
|
{
|
int *valp = table->data;
|
int val = *valp;
|
int rc;
|
|
struct ctl_table tmp = {
|
.data = &val,
|
.maxlen = sizeof(int),
|
.mode = table->mode,
|
};
|
|
rc = proc_dointvec(&tmp, write, buffer, lenp, ppos);
|
if (write && (*valp != val)) {
|
if (val < 1 || !is_power_of_2(val))
|
rc = -EINVAL;
|
else
|
*valp = val;
|
}
|
return rc;
|
}
|
|
/*
|
* IPVS sysctl table (under the /proc/sys/net/ipv4/vs/)
|
* Do not change order or insert new entries without
|
* align with netns init in ip_vs_control_net_init()
|
*/
|
|
static struct ctl_table vs_vars[] = {
|
{
|
.procname = "amemthresh",
|
.maxlen = sizeof(int),
|
.mode = 0644,
|
.proc_handler = proc_dointvec,
|
},
|
{
|
.procname = "am_droprate",
|
.maxlen = sizeof(int),
|
.mode = 0644,
|
.proc_handler = proc_dointvec,
|
},
|
{
|
.procname = "drop_entry",
|
.maxlen = sizeof(int),
|
.mode = 0644,
|
.proc_handler = proc_do_defense_mode,
|
},
|
{
|
.procname = "drop_packet",
|
.maxlen = sizeof(int),
|
.mode = 0644,
|
.proc_handler = proc_do_defense_mode,
|
},
|
#ifdef CONFIG_IP_VS_NFCT
|
{
|
.procname = "conntrack",
|
.maxlen = sizeof(int),
|
.mode = 0644,
|
.proc_handler = &proc_dointvec,
|
},
|
#endif
|
{
|
.procname = "secure_tcp",
|
.maxlen = sizeof(int),
|
.mode = 0644,
|
.proc_handler = proc_do_defense_mode,
|
},
|
{
|
.procname = "snat_reroute",
|
.maxlen = sizeof(int),
|
.mode = 0644,
|
.proc_handler = &proc_dointvec,
|
},
|
{
|
.procname = "sync_version",
|
.maxlen = sizeof(int),
|
.mode = 0644,
|
.proc_handler = proc_dointvec_minmax,
|
.extra1 = SYSCTL_ZERO,
|
.extra2 = SYSCTL_ONE,
|
},
|
{
|
.procname = "sync_ports",
|
.maxlen = sizeof(int),
|
.mode = 0644,
|
.proc_handler = proc_do_sync_ports,
|
},
|
{
|
.procname = "sync_persist_mode",
|
.maxlen = sizeof(int),
|
.mode = 0644,
|
.proc_handler = proc_dointvec,
|
},
|
{
|
.procname = "sync_qlen_max",
|
.maxlen = sizeof(unsigned long),
|
.mode = 0644,
|
.proc_handler = proc_doulongvec_minmax,
|
},
|
{
|
.procname = "sync_sock_size",
|
.maxlen = sizeof(int),
|
.mode = 0644,
|
.proc_handler = proc_dointvec,
|
},
|
{
|
.procname = "cache_bypass",
|
.maxlen = sizeof(int),
|
.mode = 0644,
|
.proc_handler = proc_dointvec,
|
},
|
{
|
.procname = "expire_nodest_conn",
|
.maxlen = sizeof(int),
|
.mode = 0644,
|
.proc_handler = proc_dointvec,
|
},
|
{
|
.procname = "sloppy_tcp",
|
.maxlen = sizeof(int),
|
.mode = 0644,
|
.proc_handler = proc_dointvec,
|
},
|
{
|
.procname = "sloppy_sctp",
|
.maxlen = sizeof(int),
|
.mode = 0644,
|
.proc_handler = proc_dointvec,
|
},
|
{
|
.procname = "expire_quiescent_template",
|
.maxlen = sizeof(int),
|
.mode = 0644,
|
.proc_handler = proc_dointvec,
|
},
|
{
|
.procname = "sync_threshold",
|
.maxlen =
|
sizeof(((struct netns_ipvs *)0)->sysctl_sync_threshold),
|
.mode = 0644,
|
.proc_handler = proc_do_sync_threshold,
|
},
|
{
|
.procname = "sync_refresh_period",
|
.maxlen = sizeof(int),
|
.mode = 0644,
|
.proc_handler = proc_dointvec_jiffies,
|
},
|
{
|
.procname = "sync_retries",
|
.maxlen = sizeof(int),
|
.mode = 0644,
|
.proc_handler = proc_dointvec_minmax,
|
.extra1 = SYSCTL_ZERO,
|
.extra2 = &three,
|
},
|
{
|
.procname = "nat_icmp_send",
|
.maxlen = sizeof(int),
|
.mode = 0644,
|
.proc_handler = proc_dointvec,
|
},
|
{
|
.procname = "pmtu_disc",
|
.maxlen = sizeof(int),
|
.mode = 0644,
|
.proc_handler = proc_dointvec,
|
},
|
{
|
.procname = "backup_only",
|
.maxlen = sizeof(int),
|
.mode = 0644,
|
.proc_handler = proc_dointvec,
|
},
|
{
|
.procname = "conn_reuse_mode",
|
.maxlen = sizeof(int),
|
.mode = 0644,
|
.proc_handler = proc_dointvec,
|
},
|
{
|
.procname = "schedule_icmp",
|
.maxlen = sizeof(int),
|
.mode = 0644,
|
.proc_handler = proc_dointvec,
|
},
|
{
|
.procname = "ignore_tunneled",
|
.maxlen = sizeof(int),
|
.mode = 0644,
|
.proc_handler = proc_dointvec,
|
},
|
#ifdef CONFIG_IP_VS_DEBUG
|
{
|
.procname = "debug_level",
|
.data = &sysctl_ip_vs_debug_level,
|
.maxlen = sizeof(int),
|
.mode = 0644,
|
.proc_handler = proc_dointvec,
|
},
|
#endif
|
{ }
|
};
|
|
#endif
|
|
#ifdef CONFIG_PROC_FS
|
|
struct ip_vs_iter {
|
struct seq_net_private p; /* Do not move this, netns depends upon it*/
|
struct hlist_head *table;
|
int bucket;
|
};
|
|
/*
|
* Write the contents of the VS rule table to a PROCfs file.
|
* (It is kept just for backward compatibility)
|
*/
|
static inline const char *ip_vs_fwd_name(unsigned int flags)
|
{
|
switch (flags & IP_VS_CONN_F_FWD_MASK) {
|
case IP_VS_CONN_F_LOCALNODE:
|
return "Local";
|
case IP_VS_CONN_F_TUNNEL:
|
return "Tunnel";
|
case IP_VS_CONN_F_DROUTE:
|
return "Route";
|
default:
|
return "Masq";
|
}
|
}
|
|
|
/* Get the Nth entry in the two lists */
|
static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos)
|
{
|
struct net *net = seq_file_net(seq);
|
struct netns_ipvs *ipvs = net_ipvs(net);
|
struct ip_vs_iter *iter = seq->private;
|
int idx;
|
struct ip_vs_service *svc;
|
|
/* look in hash by protocol */
|
for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
|
hlist_for_each_entry_rcu(svc, &ip_vs_svc_table[idx], s_list) {
|
if ((svc->ipvs == ipvs) && pos-- == 0) {
|
iter->table = ip_vs_svc_table;
|
iter->bucket = idx;
|
return svc;
|
}
|
}
|
}
|
|
/* keep looking in fwmark */
|
for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
|
hlist_for_each_entry_rcu(svc, &ip_vs_svc_fwm_table[idx],
|
f_list) {
|
if ((svc->ipvs == ipvs) && pos-- == 0) {
|
iter->table = ip_vs_svc_fwm_table;
|
iter->bucket = idx;
|
return svc;
|
}
|
}
|
}
|
|
return NULL;
|
}
|
|
static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos)
|
__acquires(RCU)
|
{
|
rcu_read_lock();
|
return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN;
|
}
|
|
|
static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
|
{
|
struct hlist_node *e;
|
struct ip_vs_iter *iter;
|
struct ip_vs_service *svc;
|
|
++*pos;
|
if (v == SEQ_START_TOKEN)
|
return ip_vs_info_array(seq,0);
|
|
svc = v;
|
iter = seq->private;
|
|
if (iter->table == ip_vs_svc_table) {
|
/* next service in table hashed by protocol */
|
e = rcu_dereference(hlist_next_rcu(&svc->s_list));
|
if (e)
|
return hlist_entry(e, struct ip_vs_service, s_list);
|
|
while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
|
hlist_for_each_entry_rcu(svc,
|
&ip_vs_svc_table[iter->bucket],
|
s_list) {
|
return svc;
|
}
|
}
|
|
iter->table = ip_vs_svc_fwm_table;
|
iter->bucket = -1;
|
goto scan_fwmark;
|
}
|
|
/* next service in hashed by fwmark */
|
e = rcu_dereference(hlist_next_rcu(&svc->f_list));
|
if (e)
|
return hlist_entry(e, struct ip_vs_service, f_list);
|
|
scan_fwmark:
|
while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
|
hlist_for_each_entry_rcu(svc,
|
&ip_vs_svc_fwm_table[iter->bucket],
|
f_list)
|
return svc;
|
}
|
|
return NULL;
|
}
|
|
static void ip_vs_info_seq_stop(struct seq_file *seq, void *v)
|
__releases(RCU)
|
{
|
rcu_read_unlock();
|
}
|
|
|
static int ip_vs_info_seq_show(struct seq_file *seq, void *v)
|
{
|
if (v == SEQ_START_TOKEN) {
|
seq_printf(seq,
|
"IP Virtual Server version %d.%d.%d (size=%d)\n",
|
NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
|
seq_puts(seq,
|
"Prot LocalAddress:Port Scheduler Flags\n");
|
seq_puts(seq,
|
" -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n");
|
} else {
|
struct net *net = seq_file_net(seq);
|
struct netns_ipvs *ipvs = net_ipvs(net);
|
const struct ip_vs_service *svc = v;
|
const struct ip_vs_iter *iter = seq->private;
|
const struct ip_vs_dest *dest;
|
struct ip_vs_scheduler *sched = rcu_dereference(svc->scheduler);
|
char *sched_name = sched ? sched->name : "none";
|
|
if (svc->ipvs != ipvs)
|
return 0;
|
if (iter->table == ip_vs_svc_table) {
|
#ifdef CONFIG_IP_VS_IPV6
|
if (svc->af == AF_INET6)
|
seq_printf(seq, "%s [%pI6]:%04X %s ",
|
ip_vs_proto_name(svc->protocol),
|
&svc->addr.in6,
|
ntohs(svc->port),
|
sched_name);
|
else
|
#endif
|
seq_printf(seq, "%s %08X:%04X %s %s ",
|
ip_vs_proto_name(svc->protocol),
|
ntohl(svc->addr.ip),
|
ntohs(svc->port),
|
sched_name,
|
(svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
|
} else {
|
seq_printf(seq, "FWM %08X %s %s",
|
svc->fwmark, sched_name,
|
(svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
|
}
|
|
if (svc->flags & IP_VS_SVC_F_PERSISTENT)
|
seq_printf(seq, "persistent %d %08X\n",
|
svc->timeout,
|
ntohl(svc->netmask));
|
else
|
seq_putc(seq, '\n');
|
|
list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
|
#ifdef CONFIG_IP_VS_IPV6
|
if (dest->af == AF_INET6)
|
seq_printf(seq,
|
" -> [%pI6]:%04X"
|
" %-7s %-6d %-10d %-10d\n",
|
&dest->addr.in6,
|
ntohs(dest->port),
|
ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
|
atomic_read(&dest->weight),
|
atomic_read(&dest->activeconns),
|
atomic_read(&dest->inactconns));
|
else
|
#endif
|
seq_printf(seq,
|
" -> %08X:%04X "
|
"%-7s %-6d %-10d %-10d\n",
|
ntohl(dest->addr.ip),
|
ntohs(dest->port),
|
ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
|
atomic_read(&dest->weight),
|
atomic_read(&dest->activeconns),
|
atomic_read(&dest->inactconns));
|
|
}
|
}
|
return 0;
|
}
|
|
static const struct seq_operations ip_vs_info_seq_ops = {
|
.start = ip_vs_info_seq_start,
|
.next = ip_vs_info_seq_next,
|
.stop = ip_vs_info_seq_stop,
|
.show = ip_vs_info_seq_show,
|
};
|
|
static int ip_vs_stats_show(struct seq_file *seq, void *v)
|
{
|
struct net *net = seq_file_single_net(seq);
|
struct ip_vs_kstats show;
|
|
/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
|
seq_puts(seq,
|
" Total Incoming Outgoing Incoming Outgoing\n");
|
seq_puts(seq,
|
" Conns Packets Packets Bytes Bytes\n");
|
|
ip_vs_copy_stats(&show, &net_ipvs(net)->tot_stats);
|
seq_printf(seq, "%8LX %8LX %8LX %16LX %16LX\n\n",
|
(unsigned long long)show.conns,
|
(unsigned long long)show.inpkts,
|
(unsigned long long)show.outpkts,
|
(unsigned long long)show.inbytes,
|
(unsigned long long)show.outbytes);
|
|
/* 01234567 01234567 01234567 0123456701234567 0123456701234567*/
|
seq_puts(seq,
|
" Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
|
seq_printf(seq, "%8LX %8LX %8LX %16LX %16LX\n",
|
(unsigned long long)show.cps,
|
(unsigned long long)show.inpps,
|
(unsigned long long)show.outpps,
|
(unsigned long long)show.inbps,
|
(unsigned long long)show.outbps);
|
|
return 0;
|
}
|
|
static int ip_vs_stats_percpu_show(struct seq_file *seq, void *v)
|
{
|
struct net *net = seq_file_single_net(seq);
|
struct ip_vs_stats *tot_stats = &net_ipvs(net)->tot_stats;
|
struct ip_vs_cpu_stats __percpu *cpustats = tot_stats->cpustats;
|
struct ip_vs_kstats kstats;
|
int i;
|
|
/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
|
seq_puts(seq,
|
" Total Incoming Outgoing Incoming Outgoing\n");
|
seq_puts(seq,
|
"CPU Conns Packets Packets Bytes Bytes\n");
|
|
for_each_possible_cpu(i) {
|
struct ip_vs_cpu_stats *u = per_cpu_ptr(cpustats, i);
|
unsigned int start;
|
u64 conns, inpkts, outpkts, inbytes, outbytes;
|
|
do {
|
start = u64_stats_fetch_begin_irq(&u->syncp);
|
conns = u->cnt.conns;
|
inpkts = u->cnt.inpkts;
|
outpkts = u->cnt.outpkts;
|
inbytes = u->cnt.inbytes;
|
outbytes = u->cnt.outbytes;
|
} while (u64_stats_fetch_retry_irq(&u->syncp, start));
|
|
seq_printf(seq, "%3X %8LX %8LX %8LX %16LX %16LX\n",
|
i, (u64)conns, (u64)inpkts,
|
(u64)outpkts, (u64)inbytes,
|
(u64)outbytes);
|
}
|
|
ip_vs_copy_stats(&kstats, tot_stats);
|
|
seq_printf(seq, " ~ %8LX %8LX %8LX %16LX %16LX\n\n",
|
(unsigned long long)kstats.conns,
|
(unsigned long long)kstats.inpkts,
|
(unsigned long long)kstats.outpkts,
|
(unsigned long long)kstats.inbytes,
|
(unsigned long long)kstats.outbytes);
|
|
/* ... 01234567 01234567 01234567 0123456701234567 0123456701234567 */
|
seq_puts(seq,
|
" Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
|
seq_printf(seq, " %8LX %8LX %8LX %16LX %16LX\n",
|
kstats.cps,
|
kstats.inpps,
|
kstats.outpps,
|
kstats.inbps,
|
kstats.outbps);
|
|
return 0;
|
}
|
#endif
|
|
/*
|
* Set timeout values for tcp tcpfin udp in the timeout_table.
|
*/
|
static int ip_vs_set_timeout(struct netns_ipvs *ipvs, struct ip_vs_timeout_user *u)
|
{
|
#if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
|
struct ip_vs_proto_data *pd;
|
#endif
|
|
IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n",
|
u->tcp_timeout,
|
u->tcp_fin_timeout,
|
u->udp_timeout);
|
|
#ifdef CONFIG_IP_VS_PROTO_TCP
|
if (u->tcp_timeout < 0 || u->tcp_timeout > (INT_MAX / HZ) ||
|
u->tcp_fin_timeout < 0 || u->tcp_fin_timeout > (INT_MAX / HZ)) {
|
return -EINVAL;
|
}
|
#endif
|
|
#ifdef CONFIG_IP_VS_PROTO_UDP
|
if (u->udp_timeout < 0 || u->udp_timeout > (INT_MAX / HZ))
|
return -EINVAL;
|
#endif
|
|
#ifdef CONFIG_IP_VS_PROTO_TCP
|
if (u->tcp_timeout) {
|
pd = ip_vs_proto_data_get(ipvs, IPPROTO_TCP);
|
pd->timeout_table[IP_VS_TCP_S_ESTABLISHED]
|
= u->tcp_timeout * HZ;
|
}
|
|
if (u->tcp_fin_timeout) {
|
pd = ip_vs_proto_data_get(ipvs, IPPROTO_TCP);
|
pd->timeout_table[IP_VS_TCP_S_FIN_WAIT]
|
= u->tcp_fin_timeout * HZ;
|
}
|
#endif
|
|
#ifdef CONFIG_IP_VS_PROTO_UDP
|
if (u->udp_timeout) {
|
pd = ip_vs_proto_data_get(ipvs, IPPROTO_UDP);
|
pd->timeout_table[IP_VS_UDP_S_NORMAL]
|
= u->udp_timeout * HZ;
|
}
|
#endif
|
return 0;
|
}
|
|
#define CMDID(cmd) (cmd - IP_VS_BASE_CTL)
|
|
struct ip_vs_svcdest_user {
|
struct ip_vs_service_user s;
|
struct ip_vs_dest_user d;
|
};
|
|
static const unsigned char set_arglen[CMDID(IP_VS_SO_SET_MAX) + 1] = {
|
[CMDID(IP_VS_SO_SET_ADD)] = sizeof(struct ip_vs_service_user),
|
[CMDID(IP_VS_SO_SET_EDIT)] = sizeof(struct ip_vs_service_user),
|
[CMDID(IP_VS_SO_SET_DEL)] = sizeof(struct ip_vs_service_user),
|
[CMDID(IP_VS_SO_SET_ADDDEST)] = sizeof(struct ip_vs_svcdest_user),
|
[CMDID(IP_VS_SO_SET_DELDEST)] = sizeof(struct ip_vs_svcdest_user),
|
[CMDID(IP_VS_SO_SET_EDITDEST)] = sizeof(struct ip_vs_svcdest_user),
|
[CMDID(IP_VS_SO_SET_TIMEOUT)] = sizeof(struct ip_vs_timeout_user),
|
[CMDID(IP_VS_SO_SET_STARTDAEMON)] = sizeof(struct ip_vs_daemon_user),
|
[CMDID(IP_VS_SO_SET_STOPDAEMON)] = sizeof(struct ip_vs_daemon_user),
|
[CMDID(IP_VS_SO_SET_ZERO)] = sizeof(struct ip_vs_service_user),
|
};
|
|
union ip_vs_set_arglen {
|
struct ip_vs_service_user field_IP_VS_SO_SET_ADD;
|
struct ip_vs_service_user field_IP_VS_SO_SET_EDIT;
|
struct ip_vs_service_user field_IP_VS_SO_SET_DEL;
|
struct ip_vs_svcdest_user field_IP_VS_SO_SET_ADDDEST;
|
struct ip_vs_svcdest_user field_IP_VS_SO_SET_DELDEST;
|
struct ip_vs_svcdest_user field_IP_VS_SO_SET_EDITDEST;
|
struct ip_vs_timeout_user field_IP_VS_SO_SET_TIMEOUT;
|
struct ip_vs_daemon_user field_IP_VS_SO_SET_STARTDAEMON;
|
struct ip_vs_daemon_user field_IP_VS_SO_SET_STOPDAEMON;
|
struct ip_vs_service_user field_IP_VS_SO_SET_ZERO;
|
};
|
|
#define MAX_SET_ARGLEN sizeof(union ip_vs_set_arglen)
|
|
static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern *usvc,
|
struct ip_vs_service_user *usvc_compat)
|
{
|
memset(usvc, 0, sizeof(*usvc));
|
|
usvc->af = AF_INET;
|
usvc->protocol = usvc_compat->protocol;
|
usvc->addr.ip = usvc_compat->addr;
|
usvc->port = usvc_compat->port;
|
usvc->fwmark = usvc_compat->fwmark;
|
|
/* Deep copy of sched_name is not needed here */
|
usvc->sched_name = usvc_compat->sched_name;
|
|
usvc->flags = usvc_compat->flags;
|
usvc->timeout = usvc_compat->timeout;
|
usvc->netmask = usvc_compat->netmask;
|
}
|
|
static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest,
|
struct ip_vs_dest_user *udest_compat)
|
{
|
memset(udest, 0, sizeof(*udest));
|
|
udest->addr.ip = udest_compat->addr;
|
udest->port = udest_compat->port;
|
udest->conn_flags = udest_compat->conn_flags;
|
udest->weight = udest_compat->weight;
|
udest->u_threshold = udest_compat->u_threshold;
|
udest->l_threshold = udest_compat->l_threshold;
|
udest->af = AF_INET;
|
udest->tun_type = IP_VS_CONN_F_TUNNEL_TYPE_IPIP;
|
}
|
|
static int
|
do_ip_vs_set_ctl(struct sock *sk, int cmd, sockptr_t ptr, unsigned int len)
|
{
|
struct net *net = sock_net(sk);
|
int ret;
|
unsigned char arg[MAX_SET_ARGLEN];
|
struct ip_vs_service_user *usvc_compat;
|
struct ip_vs_service_user_kern usvc;
|
struct ip_vs_service *svc;
|
struct ip_vs_dest_user *udest_compat;
|
struct ip_vs_dest_user_kern udest;
|
struct netns_ipvs *ipvs = net_ipvs(net);
|
|
BUILD_BUG_ON(sizeof(arg) > 255);
|
if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
|
return -EPERM;
|
|
if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_SET_MAX)
|
return -EINVAL;
|
if (len != set_arglen[CMDID(cmd)]) {
|
IP_VS_DBG(1, "set_ctl: len %u != %u\n",
|
len, set_arglen[CMDID(cmd)]);
|
return -EINVAL;
|
}
|
|
if (copy_from_sockptr(arg, ptr, len) != 0)
|
return -EFAULT;
|
|
/* Handle daemons since they have another lock */
|
if (cmd == IP_VS_SO_SET_STARTDAEMON ||
|
cmd == IP_VS_SO_SET_STOPDAEMON) {
|
struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
|
|
if (cmd == IP_VS_SO_SET_STARTDAEMON) {
|
struct ipvs_sync_daemon_cfg cfg;
|
|
memset(&cfg, 0, sizeof(cfg));
|
ret = -EINVAL;
|
if (strscpy(cfg.mcast_ifn, dm->mcast_ifn,
|
sizeof(cfg.mcast_ifn)) <= 0)
|
return ret;
|
cfg.syncid = dm->syncid;
|
ret = start_sync_thread(ipvs, &cfg, dm->state);
|
} else {
|
ret = stop_sync_thread(ipvs, dm->state);
|
}
|
return ret;
|
}
|
|
mutex_lock(&__ip_vs_mutex);
|
if (cmd == IP_VS_SO_SET_FLUSH) {
|
/* Flush the virtual service */
|
ret = ip_vs_flush(ipvs, false);
|
goto out_unlock;
|
} else if (cmd == IP_VS_SO_SET_TIMEOUT) {
|
/* Set timeout values for (tcp tcpfin udp) */
|
ret = ip_vs_set_timeout(ipvs, (struct ip_vs_timeout_user *)arg);
|
goto out_unlock;
|
} else if (!len) {
|
/* No more commands with len == 0 below */
|
ret = -EINVAL;
|
goto out_unlock;
|
}
|
|
usvc_compat = (struct ip_vs_service_user *)arg;
|
udest_compat = (struct ip_vs_dest_user *)(usvc_compat + 1);
|
|
/* We only use the new structs internally, so copy userspace compat
|
* structs to extended internal versions */
|
ip_vs_copy_usvc_compat(&usvc, usvc_compat);
|
ip_vs_copy_udest_compat(&udest, udest_compat);
|
|
if (cmd == IP_VS_SO_SET_ZERO) {
|
/* if no service address is set, zero counters in all */
|
if (!usvc.fwmark && !usvc.addr.ip && !usvc.port) {
|
ret = ip_vs_zero_all(ipvs);
|
goto out_unlock;
|
}
|
}
|
|
if ((cmd == IP_VS_SO_SET_ADD || cmd == IP_VS_SO_SET_EDIT) &&
|
strnlen(usvc.sched_name, IP_VS_SCHEDNAME_MAXLEN) ==
|
IP_VS_SCHEDNAME_MAXLEN) {
|
ret = -EINVAL;
|
goto out_unlock;
|
}
|
|
/* Check for valid protocol: TCP or UDP or SCTP, even for fwmark!=0 */
|
if (usvc.protocol != IPPROTO_TCP && usvc.protocol != IPPROTO_UDP &&
|
usvc.protocol != IPPROTO_SCTP) {
|
pr_err("set_ctl: invalid protocol: %d %pI4:%d\n",
|
usvc.protocol, &usvc.addr.ip,
|
ntohs(usvc.port));
|
ret = -EFAULT;
|
goto out_unlock;
|
}
|
|
/* Lookup the exact service by <protocol, addr, port> or fwmark */
|
rcu_read_lock();
|
if (usvc.fwmark == 0)
|
svc = __ip_vs_service_find(ipvs, usvc.af, usvc.protocol,
|
&usvc.addr, usvc.port);
|
else
|
svc = __ip_vs_svc_fwm_find(ipvs, usvc.af, usvc.fwmark);
|
rcu_read_unlock();
|
|
if (cmd != IP_VS_SO_SET_ADD
|
&& (svc == NULL || svc->protocol != usvc.protocol)) {
|
ret = -ESRCH;
|
goto out_unlock;
|
}
|
|
switch (cmd) {
|
case IP_VS_SO_SET_ADD:
|
if (svc != NULL)
|
ret = -EEXIST;
|
else
|
ret = ip_vs_add_service(ipvs, &usvc, &svc);
|
break;
|
case IP_VS_SO_SET_EDIT:
|
ret = ip_vs_edit_service(svc, &usvc);
|
break;
|
case IP_VS_SO_SET_DEL:
|
ret = ip_vs_del_service(svc);
|
if (!ret)
|
goto out_unlock;
|
break;
|
case IP_VS_SO_SET_ZERO:
|
ret = ip_vs_zero_service(svc);
|
break;
|
case IP_VS_SO_SET_ADDDEST:
|
ret = ip_vs_add_dest(svc, &udest);
|
break;
|
case IP_VS_SO_SET_EDITDEST:
|
ret = ip_vs_edit_dest(svc, &udest);
|
break;
|
case IP_VS_SO_SET_DELDEST:
|
ret = ip_vs_del_dest(svc, &udest);
|
}
|
|
out_unlock:
|
mutex_unlock(&__ip_vs_mutex);
|
return ret;
|
}
|
|
|
static void
|
ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src)
|
{
|
struct ip_vs_scheduler *sched;
|
struct ip_vs_kstats kstats;
|
char *sched_name;
|
|
sched = rcu_dereference_protected(src->scheduler, 1);
|
sched_name = sched ? sched->name : "none";
|
dst->protocol = src->protocol;
|
dst->addr = src->addr.ip;
|
dst->port = src->port;
|
dst->fwmark = src->fwmark;
|
strlcpy(dst->sched_name, sched_name, sizeof(dst->sched_name));
|
dst->flags = src->flags;
|
dst->timeout = src->timeout / HZ;
|
dst->netmask = src->netmask;
|
dst->num_dests = src->num_dests;
|
ip_vs_copy_stats(&kstats, &src->stats);
|
ip_vs_export_stats_user(&dst->stats, &kstats);
|
}
|
|
static inline int
|
__ip_vs_get_service_entries(struct netns_ipvs *ipvs,
|
const struct ip_vs_get_services *get,
|
struct ip_vs_get_services __user *uptr)
|
{
|
int idx, count=0;
|
struct ip_vs_service *svc;
|
struct ip_vs_service_entry entry;
|
int ret = 0;
|
|
for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
|
hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
|
/* Only expose IPv4 entries to old interface */
|
if (svc->af != AF_INET || (svc->ipvs != ipvs))
|
continue;
|
|
if (count >= get->num_services)
|
goto out;
|
memset(&entry, 0, sizeof(entry));
|
ip_vs_copy_service(&entry, svc);
|
if (copy_to_user(&uptr->entrytable[count],
|
&entry, sizeof(entry))) {
|
ret = -EFAULT;
|
goto out;
|
}
|
count++;
|
}
|
}
|
|
for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
|
hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
|
/* Only expose IPv4 entries to old interface */
|
if (svc->af != AF_INET || (svc->ipvs != ipvs))
|
continue;
|
|
if (count >= get->num_services)
|
goto out;
|
memset(&entry, 0, sizeof(entry));
|
ip_vs_copy_service(&entry, svc);
|
if (copy_to_user(&uptr->entrytable[count],
|
&entry, sizeof(entry))) {
|
ret = -EFAULT;
|
goto out;
|
}
|
count++;
|
}
|
}
|
out:
|
return ret;
|
}
|
|
static inline int
|
__ip_vs_get_dest_entries(struct netns_ipvs *ipvs, const struct ip_vs_get_dests *get,
|
struct ip_vs_get_dests __user *uptr)
|
{
|
struct ip_vs_service *svc;
|
union nf_inet_addr addr = { .ip = get->addr };
|
int ret = 0;
|
|
rcu_read_lock();
|
if (get->fwmark)
|
svc = __ip_vs_svc_fwm_find(ipvs, AF_INET, get->fwmark);
|
else
|
svc = __ip_vs_service_find(ipvs, AF_INET, get->protocol, &addr,
|
get->port);
|
rcu_read_unlock();
|
|
if (svc) {
|
int count = 0;
|
struct ip_vs_dest *dest;
|
struct ip_vs_dest_entry entry;
|
struct ip_vs_kstats kstats;
|
|
memset(&entry, 0, sizeof(entry));
|
list_for_each_entry(dest, &svc->destinations, n_list) {
|
if (count >= get->num_dests)
|
break;
|
|
/* Cannot expose heterogeneous members via sockopt
|
* interface
|
*/
|
if (dest->af != svc->af)
|
continue;
|
|
entry.addr = dest->addr.ip;
|
entry.port = dest->port;
|
entry.conn_flags = atomic_read(&dest->conn_flags);
|
entry.weight = atomic_read(&dest->weight);
|
entry.u_threshold = dest->u_threshold;
|
entry.l_threshold = dest->l_threshold;
|
entry.activeconns = atomic_read(&dest->activeconns);
|
entry.inactconns = atomic_read(&dest->inactconns);
|
entry.persistconns = atomic_read(&dest->persistconns);
|
ip_vs_copy_stats(&kstats, &dest->stats);
|
ip_vs_export_stats_user(&entry.stats, &kstats);
|
if (copy_to_user(&uptr->entrytable[count],
|
&entry, sizeof(entry))) {
|
ret = -EFAULT;
|
break;
|
}
|
count++;
|
}
|
} else
|
ret = -ESRCH;
|
return ret;
|
}
|
|
static inline void
|
__ip_vs_get_timeouts(struct netns_ipvs *ipvs, struct ip_vs_timeout_user *u)
|
{
|
#if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
|
struct ip_vs_proto_data *pd;
|
#endif
|
|
memset(u, 0, sizeof (*u));
|
|
#ifdef CONFIG_IP_VS_PROTO_TCP
|
pd = ip_vs_proto_data_get(ipvs, IPPROTO_TCP);
|
u->tcp_timeout = pd->timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ;
|
u->tcp_fin_timeout = pd->timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ;
|
#endif
|
#ifdef CONFIG_IP_VS_PROTO_UDP
|
pd = ip_vs_proto_data_get(ipvs, IPPROTO_UDP);
|
u->udp_timeout =
|
pd->timeout_table[IP_VS_UDP_S_NORMAL] / HZ;
|
#endif
|
}
|
|
static const unsigned char get_arglen[CMDID(IP_VS_SO_GET_MAX) + 1] = {
|
[CMDID(IP_VS_SO_GET_VERSION)] = 64,
|
[CMDID(IP_VS_SO_GET_INFO)] = sizeof(struct ip_vs_getinfo),
|
[CMDID(IP_VS_SO_GET_SERVICES)] = sizeof(struct ip_vs_get_services),
|
[CMDID(IP_VS_SO_GET_SERVICE)] = sizeof(struct ip_vs_service_entry),
|
[CMDID(IP_VS_SO_GET_DESTS)] = sizeof(struct ip_vs_get_dests),
|
[CMDID(IP_VS_SO_GET_TIMEOUT)] = sizeof(struct ip_vs_timeout_user),
|
[CMDID(IP_VS_SO_GET_DAEMON)] = 2 * sizeof(struct ip_vs_daemon_user),
|
};
|
|
union ip_vs_get_arglen {
|
char field_IP_VS_SO_GET_VERSION[64];
|
struct ip_vs_getinfo field_IP_VS_SO_GET_INFO;
|
struct ip_vs_get_services field_IP_VS_SO_GET_SERVICES;
|
struct ip_vs_service_entry field_IP_VS_SO_GET_SERVICE;
|
struct ip_vs_get_dests field_IP_VS_SO_GET_DESTS;
|
struct ip_vs_timeout_user field_IP_VS_SO_GET_TIMEOUT;
|
struct ip_vs_daemon_user field_IP_VS_SO_GET_DAEMON[2];
|
};
|
|
#define MAX_GET_ARGLEN sizeof(union ip_vs_get_arglen)
|
|
static int
|
do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
|
{
|
unsigned char arg[MAX_GET_ARGLEN];
|
int ret = 0;
|
unsigned int copylen;
|
struct net *net = sock_net(sk);
|
struct netns_ipvs *ipvs = net_ipvs(net);
|
|
BUG_ON(!net);
|
BUILD_BUG_ON(sizeof(arg) > 255);
|
if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
|
return -EPERM;
|
|
if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_GET_MAX)
|
return -EINVAL;
|
|
copylen = get_arglen[CMDID(cmd)];
|
if (*len < (int) copylen) {
|
IP_VS_DBG(1, "get_ctl: len %d < %u\n", *len, copylen);
|
return -EINVAL;
|
}
|
|
if (copy_from_user(arg, user, copylen) != 0)
|
return -EFAULT;
|
/*
|
* Handle daemons first since it has its own locking
|
*/
|
if (cmd == IP_VS_SO_GET_DAEMON) {
|
struct ip_vs_daemon_user d[2];
|
|
memset(&d, 0, sizeof(d));
|
mutex_lock(&ipvs->sync_mutex);
|
if (ipvs->sync_state & IP_VS_STATE_MASTER) {
|
d[0].state = IP_VS_STATE_MASTER;
|
strlcpy(d[0].mcast_ifn, ipvs->mcfg.mcast_ifn,
|
sizeof(d[0].mcast_ifn));
|
d[0].syncid = ipvs->mcfg.syncid;
|
}
|
if (ipvs->sync_state & IP_VS_STATE_BACKUP) {
|
d[1].state = IP_VS_STATE_BACKUP;
|
strlcpy(d[1].mcast_ifn, ipvs->bcfg.mcast_ifn,
|
sizeof(d[1].mcast_ifn));
|
d[1].syncid = ipvs->bcfg.syncid;
|
}
|
if (copy_to_user(user, &d, sizeof(d)) != 0)
|
ret = -EFAULT;
|
mutex_unlock(&ipvs->sync_mutex);
|
return ret;
|
}
|
|
mutex_lock(&__ip_vs_mutex);
|
switch (cmd) {
|
case IP_VS_SO_GET_VERSION:
|
{
|
char buf[64];
|
|
sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)",
|
NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
|
if (copy_to_user(user, buf, strlen(buf)+1) != 0) {
|
ret = -EFAULT;
|
goto out;
|
}
|
*len = strlen(buf)+1;
|
}
|
break;
|
|
case IP_VS_SO_GET_INFO:
|
{
|
struct ip_vs_getinfo info;
|
info.version = IP_VS_VERSION_CODE;
|
info.size = ip_vs_conn_tab_size;
|
info.num_services = ipvs->num_services;
|
if (copy_to_user(user, &info, sizeof(info)) != 0)
|
ret = -EFAULT;
|
}
|
break;
|
|
case IP_VS_SO_GET_SERVICES:
|
{
|
struct ip_vs_get_services *get;
|
int size;
|
|
get = (struct ip_vs_get_services *)arg;
|
size = struct_size(get, entrytable, get->num_services);
|
if (*len != size) {
|
pr_err("length: %u != %u\n", *len, size);
|
ret = -EINVAL;
|
goto out;
|
}
|
ret = __ip_vs_get_service_entries(ipvs, get, user);
|
}
|
break;
|
|
case IP_VS_SO_GET_SERVICE:
|
{
|
struct ip_vs_service_entry *entry;
|
struct ip_vs_service *svc;
|
union nf_inet_addr addr;
|
|
entry = (struct ip_vs_service_entry *)arg;
|
addr.ip = entry->addr;
|
rcu_read_lock();
|
if (entry->fwmark)
|
svc = __ip_vs_svc_fwm_find(ipvs, AF_INET, entry->fwmark);
|
else
|
svc = __ip_vs_service_find(ipvs, AF_INET,
|
entry->protocol, &addr,
|
entry->port);
|
rcu_read_unlock();
|
if (svc) {
|
ip_vs_copy_service(entry, svc);
|
if (copy_to_user(user, entry, sizeof(*entry)) != 0)
|
ret = -EFAULT;
|
} else
|
ret = -ESRCH;
|
}
|
break;
|
|
case IP_VS_SO_GET_DESTS:
|
{
|
struct ip_vs_get_dests *get;
|
int size;
|
|
get = (struct ip_vs_get_dests *)arg;
|
size = struct_size(get, entrytable, get->num_dests);
|
if (*len != size) {
|
pr_err("length: %u != %u\n", *len, size);
|
ret = -EINVAL;
|
goto out;
|
}
|
ret = __ip_vs_get_dest_entries(ipvs, get, user);
|
}
|
break;
|
|
case IP_VS_SO_GET_TIMEOUT:
|
{
|
struct ip_vs_timeout_user t;
|
|
__ip_vs_get_timeouts(ipvs, &t);
|
if (copy_to_user(user, &t, sizeof(t)) != 0)
|
ret = -EFAULT;
|
}
|
break;
|
|
default:
|
ret = -EINVAL;
|
}
|
|
out:
|
mutex_unlock(&__ip_vs_mutex);
|
return ret;
|
}
|
|
|
static struct nf_sockopt_ops ip_vs_sockopts = {
|
.pf = PF_INET,
|
.set_optmin = IP_VS_BASE_CTL,
|
.set_optmax = IP_VS_SO_SET_MAX+1,
|
.set = do_ip_vs_set_ctl,
|
.get_optmin = IP_VS_BASE_CTL,
|
.get_optmax = IP_VS_SO_GET_MAX+1,
|
.get = do_ip_vs_get_ctl,
|
.owner = THIS_MODULE,
|
};
|
|
/*
|
* Generic Netlink interface
|
*/
|
|
/* IPVS genetlink family */
|
static struct genl_family ip_vs_genl_family;
|
|
/* Policy used for first-level command attributes */
|
static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = {
|
[IPVS_CMD_ATTR_SERVICE] = { .type = NLA_NESTED },
|
[IPVS_CMD_ATTR_DEST] = { .type = NLA_NESTED },
|
[IPVS_CMD_ATTR_DAEMON] = { .type = NLA_NESTED },
|
[IPVS_CMD_ATTR_TIMEOUT_TCP] = { .type = NLA_U32 },
|
[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN] = { .type = NLA_U32 },
|
[IPVS_CMD_ATTR_TIMEOUT_UDP] = { .type = NLA_U32 },
|
};
|
|
/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */
|
static const struct nla_policy ip_vs_daemon_policy[IPVS_DAEMON_ATTR_MAX + 1] = {
|
[IPVS_DAEMON_ATTR_STATE] = { .type = NLA_U32 },
|
[IPVS_DAEMON_ATTR_MCAST_IFN] = { .type = NLA_NUL_STRING,
|
.len = IP_VS_IFNAME_MAXLEN - 1 },
|
[IPVS_DAEMON_ATTR_SYNC_ID] = { .type = NLA_U32 },
|
[IPVS_DAEMON_ATTR_SYNC_MAXLEN] = { .type = NLA_U16 },
|
[IPVS_DAEMON_ATTR_MCAST_GROUP] = { .type = NLA_U32 },
|
[IPVS_DAEMON_ATTR_MCAST_GROUP6] = { .len = sizeof(struct in6_addr) },
|
[IPVS_DAEMON_ATTR_MCAST_PORT] = { .type = NLA_U16 },
|
[IPVS_DAEMON_ATTR_MCAST_TTL] = { .type = NLA_U8 },
|
};
|
|
/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */
|
static const struct nla_policy ip_vs_svc_policy[IPVS_SVC_ATTR_MAX + 1] = {
|
[IPVS_SVC_ATTR_AF] = { .type = NLA_U16 },
|
[IPVS_SVC_ATTR_PROTOCOL] = { .type = NLA_U16 },
|
[IPVS_SVC_ATTR_ADDR] = { .type = NLA_BINARY,
|
.len = sizeof(union nf_inet_addr) },
|
[IPVS_SVC_ATTR_PORT] = { .type = NLA_U16 },
|
[IPVS_SVC_ATTR_FWMARK] = { .type = NLA_U32 },
|
[IPVS_SVC_ATTR_SCHED_NAME] = { .type = NLA_NUL_STRING,
|
.len = IP_VS_SCHEDNAME_MAXLEN - 1 },
|
[IPVS_SVC_ATTR_PE_NAME] = { .type = NLA_NUL_STRING,
|
.len = IP_VS_PENAME_MAXLEN },
|
[IPVS_SVC_ATTR_FLAGS] = { .type = NLA_BINARY,
|
.len = sizeof(struct ip_vs_flags) },
|
[IPVS_SVC_ATTR_TIMEOUT] = { .type = NLA_U32 },
|
[IPVS_SVC_ATTR_NETMASK] = { .type = NLA_U32 },
|
[IPVS_SVC_ATTR_STATS] = { .type = NLA_NESTED },
|
};
|
|
/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */
|
static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = {
|
[IPVS_DEST_ATTR_ADDR] = { .type = NLA_BINARY,
|
.len = sizeof(union nf_inet_addr) },
|
[IPVS_DEST_ATTR_PORT] = { .type = NLA_U16 },
|
[IPVS_DEST_ATTR_FWD_METHOD] = { .type = NLA_U32 },
|
[IPVS_DEST_ATTR_WEIGHT] = { .type = NLA_U32 },
|
[IPVS_DEST_ATTR_U_THRESH] = { .type = NLA_U32 },
|
[IPVS_DEST_ATTR_L_THRESH] = { .type = NLA_U32 },
|
[IPVS_DEST_ATTR_ACTIVE_CONNS] = { .type = NLA_U32 },
|
[IPVS_DEST_ATTR_INACT_CONNS] = { .type = NLA_U32 },
|
[IPVS_DEST_ATTR_PERSIST_CONNS] = { .type = NLA_U32 },
|
[IPVS_DEST_ATTR_STATS] = { .type = NLA_NESTED },
|
[IPVS_DEST_ATTR_ADDR_FAMILY] = { .type = NLA_U16 },
|
[IPVS_DEST_ATTR_TUN_TYPE] = { .type = NLA_U8 },
|
[IPVS_DEST_ATTR_TUN_PORT] = { .type = NLA_U16 },
|
[IPVS_DEST_ATTR_TUN_FLAGS] = { .type = NLA_U16 },
|
};
|
|
static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type,
|
struct ip_vs_kstats *kstats)
|
{
|
struct nlattr *nl_stats = nla_nest_start_noflag(skb, container_type);
|
|
if (!nl_stats)
|
return -EMSGSIZE;
|
|
if (nla_put_u32(skb, IPVS_STATS_ATTR_CONNS, (u32)kstats->conns) ||
|
nla_put_u32(skb, IPVS_STATS_ATTR_INPKTS, (u32)kstats->inpkts) ||
|
nla_put_u32(skb, IPVS_STATS_ATTR_OUTPKTS, (u32)kstats->outpkts) ||
|
nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INBYTES, kstats->inbytes,
|
IPVS_STATS_ATTR_PAD) ||
|
nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTBYTES, kstats->outbytes,
|
IPVS_STATS_ATTR_PAD) ||
|
nla_put_u32(skb, IPVS_STATS_ATTR_CPS, (u32)kstats->cps) ||
|
nla_put_u32(skb, IPVS_STATS_ATTR_INPPS, (u32)kstats->inpps) ||
|
nla_put_u32(skb, IPVS_STATS_ATTR_OUTPPS, (u32)kstats->outpps) ||
|
nla_put_u32(skb, IPVS_STATS_ATTR_INBPS, (u32)kstats->inbps) ||
|
nla_put_u32(skb, IPVS_STATS_ATTR_OUTBPS, (u32)kstats->outbps))
|
goto nla_put_failure;
|
nla_nest_end(skb, nl_stats);
|
|
return 0;
|
|
nla_put_failure:
|
nla_nest_cancel(skb, nl_stats);
|
return -EMSGSIZE;
|
}
|
|
static int ip_vs_genl_fill_stats64(struct sk_buff *skb, int container_type,
|
struct ip_vs_kstats *kstats)
|
{
|
struct nlattr *nl_stats = nla_nest_start_noflag(skb, container_type);
|
|
if (!nl_stats)
|
return -EMSGSIZE;
|
|
if (nla_put_u64_64bit(skb, IPVS_STATS_ATTR_CONNS, kstats->conns,
|
IPVS_STATS_ATTR_PAD) ||
|
nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INPKTS, kstats->inpkts,
|
IPVS_STATS_ATTR_PAD) ||
|
nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTPKTS, kstats->outpkts,
|
IPVS_STATS_ATTR_PAD) ||
|
nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INBYTES, kstats->inbytes,
|
IPVS_STATS_ATTR_PAD) ||
|
nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTBYTES, kstats->outbytes,
|
IPVS_STATS_ATTR_PAD) ||
|
nla_put_u64_64bit(skb, IPVS_STATS_ATTR_CPS, kstats->cps,
|
IPVS_STATS_ATTR_PAD) ||
|
nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INPPS, kstats->inpps,
|
IPVS_STATS_ATTR_PAD) ||
|
nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTPPS, kstats->outpps,
|
IPVS_STATS_ATTR_PAD) ||
|
nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INBPS, kstats->inbps,
|
IPVS_STATS_ATTR_PAD) ||
|
nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTBPS, kstats->outbps,
|
IPVS_STATS_ATTR_PAD))
|
goto nla_put_failure;
|
nla_nest_end(skb, nl_stats);
|
|
return 0;
|
|
nla_put_failure:
|
nla_nest_cancel(skb, nl_stats);
|
return -EMSGSIZE;
|
}
|
|
static int ip_vs_genl_fill_service(struct sk_buff *skb,
|
struct ip_vs_service *svc)
|
{
|
struct ip_vs_scheduler *sched;
|
struct ip_vs_pe *pe;
|
struct nlattr *nl_service;
|
struct ip_vs_flags flags = { .flags = svc->flags,
|
.mask = ~0 };
|
struct ip_vs_kstats kstats;
|
char *sched_name;
|
|
nl_service = nla_nest_start_noflag(skb, IPVS_CMD_ATTR_SERVICE);
|
if (!nl_service)
|
return -EMSGSIZE;
|
|
if (nla_put_u16(skb, IPVS_SVC_ATTR_AF, svc->af))
|
goto nla_put_failure;
|
if (svc->fwmark) {
|
if (nla_put_u32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark))
|
goto nla_put_failure;
|
} else {
|
if (nla_put_u16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol) ||
|
nla_put(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr) ||
|
nla_put_be16(skb, IPVS_SVC_ATTR_PORT, svc->port))
|
goto nla_put_failure;
|
}
|
|
sched = rcu_dereference_protected(svc->scheduler, 1);
|
sched_name = sched ? sched->name : "none";
|
pe = rcu_dereference_protected(svc->pe, 1);
|
if (nla_put_string(skb, IPVS_SVC_ATTR_SCHED_NAME, sched_name) ||
|
(pe && nla_put_string(skb, IPVS_SVC_ATTR_PE_NAME, pe->name)) ||
|
nla_put(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags) ||
|
nla_put_u32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ) ||
|
nla_put_be32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask))
|
goto nla_put_failure;
|
ip_vs_copy_stats(&kstats, &svc->stats);
|
if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &kstats))
|
goto nla_put_failure;
|
if (ip_vs_genl_fill_stats64(skb, IPVS_SVC_ATTR_STATS64, &kstats))
|
goto nla_put_failure;
|
|
nla_nest_end(skb, nl_service);
|
|
return 0;
|
|
nla_put_failure:
|
nla_nest_cancel(skb, nl_service);
|
return -EMSGSIZE;
|
}
|
|
static int ip_vs_genl_dump_service(struct sk_buff *skb,
|
struct ip_vs_service *svc,
|
struct netlink_callback *cb)
|
{
|
void *hdr;
|
|
hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
|
&ip_vs_genl_family, NLM_F_MULTI,
|
IPVS_CMD_NEW_SERVICE);
|
if (!hdr)
|
return -EMSGSIZE;
|
|
if (ip_vs_genl_fill_service(skb, svc) < 0)
|
goto nla_put_failure;
|
|
genlmsg_end(skb, hdr);
|
return 0;
|
|
nla_put_failure:
|
genlmsg_cancel(skb, hdr);
|
return -EMSGSIZE;
|
}
|
|
static int ip_vs_genl_dump_services(struct sk_buff *skb,
|
struct netlink_callback *cb)
|
{
|
int idx = 0, i;
|
int start = cb->args[0];
|
struct ip_vs_service *svc;
|
struct net *net = sock_net(skb->sk);
|
struct netns_ipvs *ipvs = net_ipvs(net);
|
|
mutex_lock(&__ip_vs_mutex);
|
for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
|
hlist_for_each_entry(svc, &ip_vs_svc_table[i], s_list) {
|
if (++idx <= start || (svc->ipvs != ipvs))
|
continue;
|
if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
|
idx--;
|
goto nla_put_failure;
|
}
|
}
|
}
|
|
for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
|
hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[i], f_list) {
|
if (++idx <= start || (svc->ipvs != ipvs))
|
continue;
|
if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
|
idx--;
|
goto nla_put_failure;
|
}
|
}
|
}
|
|
nla_put_failure:
|
mutex_unlock(&__ip_vs_mutex);
|
cb->args[0] = idx;
|
|
return skb->len;
|
}
|
|
static bool ip_vs_is_af_valid(int af)
|
{
|
if (af == AF_INET)
|
return true;
|
#ifdef CONFIG_IP_VS_IPV6
|
if (af == AF_INET6 && ipv6_mod_enabled())
|
return true;
|
#endif
|
return false;
|
}
|
|
static int ip_vs_genl_parse_service(struct netns_ipvs *ipvs,
|
struct ip_vs_service_user_kern *usvc,
|
struct nlattr *nla, bool full_entry,
|
struct ip_vs_service **ret_svc)
|
{
|
struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1];
|
struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr;
|
struct ip_vs_service *svc;
|
|
/* Parse mandatory identifying service fields first */
|
if (nla == NULL ||
|
nla_parse_nested_deprecated(attrs, IPVS_SVC_ATTR_MAX, nla, ip_vs_svc_policy, NULL))
|
return -EINVAL;
|
|
nla_af = attrs[IPVS_SVC_ATTR_AF];
|
nla_protocol = attrs[IPVS_SVC_ATTR_PROTOCOL];
|
nla_addr = attrs[IPVS_SVC_ATTR_ADDR];
|
nla_port = attrs[IPVS_SVC_ATTR_PORT];
|
nla_fwmark = attrs[IPVS_SVC_ATTR_FWMARK];
|
|
if (!(nla_af && (nla_fwmark || (nla_port && nla_protocol && nla_addr))))
|
return -EINVAL;
|
|
memset(usvc, 0, sizeof(*usvc));
|
|
usvc->af = nla_get_u16(nla_af);
|
if (!ip_vs_is_af_valid(usvc->af))
|
return -EAFNOSUPPORT;
|
|
if (nla_fwmark) {
|
usvc->protocol = IPPROTO_TCP;
|
usvc->fwmark = nla_get_u32(nla_fwmark);
|
} else {
|
usvc->protocol = nla_get_u16(nla_protocol);
|
nla_memcpy(&usvc->addr, nla_addr, sizeof(usvc->addr));
|
usvc->port = nla_get_be16(nla_port);
|
usvc->fwmark = 0;
|
}
|
|
rcu_read_lock();
|
if (usvc->fwmark)
|
svc = __ip_vs_svc_fwm_find(ipvs, usvc->af, usvc->fwmark);
|
else
|
svc = __ip_vs_service_find(ipvs, usvc->af, usvc->protocol,
|
&usvc->addr, usvc->port);
|
rcu_read_unlock();
|
*ret_svc = svc;
|
|
/* If a full entry was requested, check for the additional fields */
|
if (full_entry) {
|
struct nlattr *nla_sched, *nla_flags, *nla_pe, *nla_timeout,
|
*nla_netmask;
|
struct ip_vs_flags flags;
|
|
nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME];
|
nla_pe = attrs[IPVS_SVC_ATTR_PE_NAME];
|
nla_flags = attrs[IPVS_SVC_ATTR_FLAGS];
|
nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT];
|
nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK];
|
|
if (!(nla_sched && nla_flags && nla_timeout && nla_netmask))
|
return -EINVAL;
|
|
nla_memcpy(&flags, nla_flags, sizeof(flags));
|
|
/* prefill flags from service if it already exists */
|
if (svc)
|
usvc->flags = svc->flags;
|
|
/* set new flags from userland */
|
usvc->flags = (usvc->flags & ~flags.mask) |
|
(flags.flags & flags.mask);
|
usvc->sched_name = nla_data(nla_sched);
|
usvc->pe_name = nla_pe ? nla_data(nla_pe) : NULL;
|
usvc->timeout = nla_get_u32(nla_timeout);
|
usvc->netmask = nla_get_be32(nla_netmask);
|
}
|
|
return 0;
|
}
|
|
static struct ip_vs_service *ip_vs_genl_find_service(struct netns_ipvs *ipvs,
|
struct nlattr *nla)
|
{
|
struct ip_vs_service_user_kern usvc;
|
struct ip_vs_service *svc;
|
int ret;
|
|
ret = ip_vs_genl_parse_service(ipvs, &usvc, nla, false, &svc);
|
return ret ? ERR_PTR(ret) : svc;
|
}
|
|
static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest)
|
{
|
struct nlattr *nl_dest;
|
struct ip_vs_kstats kstats;
|
|
nl_dest = nla_nest_start_noflag(skb, IPVS_CMD_ATTR_DEST);
|
if (!nl_dest)
|
return -EMSGSIZE;
|
|
if (nla_put(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr) ||
|
nla_put_be16(skb, IPVS_DEST_ATTR_PORT, dest->port) ||
|
nla_put_u32(skb, IPVS_DEST_ATTR_FWD_METHOD,
|
(atomic_read(&dest->conn_flags) &
|
IP_VS_CONN_F_FWD_MASK)) ||
|
nla_put_u32(skb, IPVS_DEST_ATTR_WEIGHT,
|
atomic_read(&dest->weight)) ||
|
nla_put_u8(skb, IPVS_DEST_ATTR_TUN_TYPE,
|
dest->tun_type) ||
|
nla_put_be16(skb, IPVS_DEST_ATTR_TUN_PORT,
|
dest->tun_port) ||
|
nla_put_u16(skb, IPVS_DEST_ATTR_TUN_FLAGS,
|
dest->tun_flags) ||
|
nla_put_u32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold) ||
|
nla_put_u32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold) ||
|
nla_put_u32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS,
|
atomic_read(&dest->activeconns)) ||
|
nla_put_u32(skb, IPVS_DEST_ATTR_INACT_CONNS,
|
atomic_read(&dest->inactconns)) ||
|
nla_put_u32(skb, IPVS_DEST_ATTR_PERSIST_CONNS,
|
atomic_read(&dest->persistconns)) ||
|
nla_put_u16(skb, IPVS_DEST_ATTR_ADDR_FAMILY, dest->af))
|
goto nla_put_failure;
|
ip_vs_copy_stats(&kstats, &dest->stats);
|
if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &kstats))
|
goto nla_put_failure;
|
if (ip_vs_genl_fill_stats64(skb, IPVS_DEST_ATTR_STATS64, &kstats))
|
goto nla_put_failure;
|
|
nla_nest_end(skb, nl_dest);
|
|
return 0;
|
|
nla_put_failure:
|
nla_nest_cancel(skb, nl_dest);
|
return -EMSGSIZE;
|
}
|
|
static int ip_vs_genl_dump_dest(struct sk_buff *skb, struct ip_vs_dest *dest,
|
struct netlink_callback *cb)
|
{
|
void *hdr;
|
|
hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
|
&ip_vs_genl_family, NLM_F_MULTI,
|
IPVS_CMD_NEW_DEST);
|
if (!hdr)
|
return -EMSGSIZE;
|
|
if (ip_vs_genl_fill_dest(skb, dest) < 0)
|
goto nla_put_failure;
|
|
genlmsg_end(skb, hdr);
|
return 0;
|
|
nla_put_failure:
|
genlmsg_cancel(skb, hdr);
|
return -EMSGSIZE;
|
}
|
|
static int ip_vs_genl_dump_dests(struct sk_buff *skb,
|
struct netlink_callback *cb)
|
{
|
int idx = 0;
|
int start = cb->args[0];
|
struct ip_vs_service *svc;
|
struct ip_vs_dest *dest;
|
struct nlattr *attrs[IPVS_CMD_ATTR_MAX + 1];
|
struct net *net = sock_net(skb->sk);
|
struct netns_ipvs *ipvs = net_ipvs(net);
|
|
mutex_lock(&__ip_vs_mutex);
|
|
/* Try to find the service for which to dump destinations */
|
if (nlmsg_parse_deprecated(cb->nlh, GENL_HDRLEN, attrs, IPVS_CMD_ATTR_MAX, ip_vs_cmd_policy, cb->extack))
|
goto out_err;
|
|
|
svc = ip_vs_genl_find_service(ipvs, attrs[IPVS_CMD_ATTR_SERVICE]);
|
if (IS_ERR_OR_NULL(svc))
|
goto out_err;
|
|
/* Dump the destinations */
|
list_for_each_entry(dest, &svc->destinations, n_list) {
|
if (++idx <= start)
|
continue;
|
if (ip_vs_genl_dump_dest(skb, dest, cb) < 0) {
|
idx--;
|
goto nla_put_failure;
|
}
|
}
|
|
nla_put_failure:
|
cb->args[0] = idx;
|
|
out_err:
|
mutex_unlock(&__ip_vs_mutex);
|
|
return skb->len;
|
}
|
|
static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern *udest,
|
struct nlattr *nla, bool full_entry)
|
{
|
struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1];
|
struct nlattr *nla_addr, *nla_port;
|
struct nlattr *nla_addr_family;
|
|
/* Parse mandatory identifying destination fields first */
|
if (nla == NULL ||
|
nla_parse_nested_deprecated(attrs, IPVS_DEST_ATTR_MAX, nla, ip_vs_dest_policy, NULL))
|
return -EINVAL;
|
|
nla_addr = attrs[IPVS_DEST_ATTR_ADDR];
|
nla_port = attrs[IPVS_DEST_ATTR_PORT];
|
nla_addr_family = attrs[IPVS_DEST_ATTR_ADDR_FAMILY];
|
|
if (!(nla_addr && nla_port))
|
return -EINVAL;
|
|
memset(udest, 0, sizeof(*udest));
|
|
nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr));
|
udest->port = nla_get_be16(nla_port);
|
|
if (nla_addr_family)
|
udest->af = nla_get_u16(nla_addr_family);
|
else
|
udest->af = 0;
|
|
/* If a full entry was requested, check for the additional fields */
|
if (full_entry) {
|
struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh,
|
*nla_l_thresh, *nla_tun_type, *nla_tun_port,
|
*nla_tun_flags;
|
|
nla_fwd = attrs[IPVS_DEST_ATTR_FWD_METHOD];
|
nla_weight = attrs[IPVS_DEST_ATTR_WEIGHT];
|
nla_u_thresh = attrs[IPVS_DEST_ATTR_U_THRESH];
|
nla_l_thresh = attrs[IPVS_DEST_ATTR_L_THRESH];
|
nla_tun_type = attrs[IPVS_DEST_ATTR_TUN_TYPE];
|
nla_tun_port = attrs[IPVS_DEST_ATTR_TUN_PORT];
|
nla_tun_flags = attrs[IPVS_DEST_ATTR_TUN_FLAGS];
|
|
if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh))
|
return -EINVAL;
|
|
udest->conn_flags = nla_get_u32(nla_fwd)
|
& IP_VS_CONN_F_FWD_MASK;
|
udest->weight = nla_get_u32(nla_weight);
|
udest->u_threshold = nla_get_u32(nla_u_thresh);
|
udest->l_threshold = nla_get_u32(nla_l_thresh);
|
|
if (nla_tun_type)
|
udest->tun_type = nla_get_u8(nla_tun_type);
|
|
if (nla_tun_port)
|
udest->tun_port = nla_get_be16(nla_tun_port);
|
|
if (nla_tun_flags)
|
udest->tun_flags = nla_get_u16(nla_tun_flags);
|
}
|
|
return 0;
|
}
|
|
static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __u32 state,
|
struct ipvs_sync_daemon_cfg *c)
|
{
|
struct nlattr *nl_daemon;
|
|
nl_daemon = nla_nest_start_noflag(skb, IPVS_CMD_ATTR_DAEMON);
|
if (!nl_daemon)
|
return -EMSGSIZE;
|
|
if (nla_put_u32(skb, IPVS_DAEMON_ATTR_STATE, state) ||
|
nla_put_string(skb, IPVS_DAEMON_ATTR_MCAST_IFN, c->mcast_ifn) ||
|
nla_put_u32(skb, IPVS_DAEMON_ATTR_SYNC_ID, c->syncid) ||
|
nla_put_u16(skb, IPVS_DAEMON_ATTR_SYNC_MAXLEN, c->sync_maxlen) ||
|
nla_put_u16(skb, IPVS_DAEMON_ATTR_MCAST_PORT, c->mcast_port) ||
|
nla_put_u8(skb, IPVS_DAEMON_ATTR_MCAST_TTL, c->mcast_ttl))
|
goto nla_put_failure;
|
#ifdef CONFIG_IP_VS_IPV6
|
if (c->mcast_af == AF_INET6) {
|
if (nla_put_in6_addr(skb, IPVS_DAEMON_ATTR_MCAST_GROUP6,
|
&c->mcast_group.in6))
|
goto nla_put_failure;
|
} else
|
#endif
|
if (c->mcast_af == AF_INET &&
|
nla_put_in_addr(skb, IPVS_DAEMON_ATTR_MCAST_GROUP,
|
c->mcast_group.ip))
|
goto nla_put_failure;
|
nla_nest_end(skb, nl_daemon);
|
|
return 0;
|
|
nla_put_failure:
|
nla_nest_cancel(skb, nl_daemon);
|
return -EMSGSIZE;
|
}
|
|
static int ip_vs_genl_dump_daemon(struct sk_buff *skb, __u32 state,
|
struct ipvs_sync_daemon_cfg *c,
|
struct netlink_callback *cb)
|
{
|
void *hdr;
|
hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
|
&ip_vs_genl_family, NLM_F_MULTI,
|
IPVS_CMD_NEW_DAEMON);
|
if (!hdr)
|
return -EMSGSIZE;
|
|
if (ip_vs_genl_fill_daemon(skb, state, c))
|
goto nla_put_failure;
|
|
genlmsg_end(skb, hdr);
|
return 0;
|
|
nla_put_failure:
|
genlmsg_cancel(skb, hdr);
|
return -EMSGSIZE;
|
}
|
|
static int ip_vs_genl_dump_daemons(struct sk_buff *skb,
|
struct netlink_callback *cb)
|
{
|
struct net *net = sock_net(skb->sk);
|
struct netns_ipvs *ipvs = net_ipvs(net);
|
|
mutex_lock(&ipvs->sync_mutex);
|
if ((ipvs->sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) {
|
if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER,
|
&ipvs->mcfg, cb) < 0)
|
goto nla_put_failure;
|
|
cb->args[0] = 1;
|
}
|
|
if ((ipvs->sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) {
|
if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP,
|
&ipvs->bcfg, cb) < 0)
|
goto nla_put_failure;
|
|
cb->args[1] = 1;
|
}
|
|
nla_put_failure:
|
mutex_unlock(&ipvs->sync_mutex);
|
|
return skb->len;
|
}
|
|
static int ip_vs_genl_new_daemon(struct netns_ipvs *ipvs, struct nlattr **attrs)
|
{
|
struct ipvs_sync_daemon_cfg c;
|
struct nlattr *a;
|
int ret;
|
|
memset(&c, 0, sizeof(c));
|
if (!(attrs[IPVS_DAEMON_ATTR_STATE] &&
|
attrs[IPVS_DAEMON_ATTR_MCAST_IFN] &&
|
attrs[IPVS_DAEMON_ATTR_SYNC_ID]))
|
return -EINVAL;
|
strlcpy(c.mcast_ifn, nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]),
|
sizeof(c.mcast_ifn));
|
c.syncid = nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID]);
|
|
a = attrs[IPVS_DAEMON_ATTR_SYNC_MAXLEN];
|
if (a)
|
c.sync_maxlen = nla_get_u16(a);
|
|
a = attrs[IPVS_DAEMON_ATTR_MCAST_GROUP];
|
if (a) {
|
c.mcast_af = AF_INET;
|
c.mcast_group.ip = nla_get_in_addr(a);
|
if (!ipv4_is_multicast(c.mcast_group.ip))
|
return -EINVAL;
|
} else {
|
a = attrs[IPVS_DAEMON_ATTR_MCAST_GROUP6];
|
if (a) {
|
#ifdef CONFIG_IP_VS_IPV6
|
int addr_type;
|
|
c.mcast_af = AF_INET6;
|
c.mcast_group.in6 = nla_get_in6_addr(a);
|
addr_type = ipv6_addr_type(&c.mcast_group.in6);
|
if (!(addr_type & IPV6_ADDR_MULTICAST))
|
return -EINVAL;
|
#else
|
return -EAFNOSUPPORT;
|
#endif
|
}
|
}
|
|
a = attrs[IPVS_DAEMON_ATTR_MCAST_PORT];
|
if (a)
|
c.mcast_port = nla_get_u16(a);
|
|
a = attrs[IPVS_DAEMON_ATTR_MCAST_TTL];
|
if (a)
|
c.mcast_ttl = nla_get_u8(a);
|
|
/* The synchronization protocol is incompatible with mixed family
|
* services
|
*/
|
if (ipvs->mixed_address_family_dests > 0)
|
return -EINVAL;
|
|
ret = start_sync_thread(ipvs, &c,
|
nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
|
return ret;
|
}
|
|
static int ip_vs_genl_del_daemon(struct netns_ipvs *ipvs, struct nlattr **attrs)
|
{
|
int ret;
|
|
if (!attrs[IPVS_DAEMON_ATTR_STATE])
|
return -EINVAL;
|
|
ret = stop_sync_thread(ipvs,
|
nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
|
return ret;
|
}
|
|
static int ip_vs_genl_set_config(struct netns_ipvs *ipvs, struct nlattr **attrs)
|
{
|
struct ip_vs_timeout_user t;
|
|
__ip_vs_get_timeouts(ipvs, &t);
|
|
if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP])
|
t.tcp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]);
|
|
if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN])
|
t.tcp_fin_timeout =
|
nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]);
|
|
if (attrs[IPVS_CMD_ATTR_TIMEOUT_UDP])
|
t.udp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]);
|
|
return ip_vs_set_timeout(ipvs, &t);
|
}
|
|
static int ip_vs_genl_set_daemon(struct sk_buff *skb, struct genl_info *info)
|
{
|
int ret = -EINVAL, cmd;
|
struct net *net = sock_net(skb->sk);
|
struct netns_ipvs *ipvs = net_ipvs(net);
|
|
cmd = info->genlhdr->cmd;
|
|
if (cmd == IPVS_CMD_NEW_DAEMON || cmd == IPVS_CMD_DEL_DAEMON) {
|
struct nlattr *daemon_attrs[IPVS_DAEMON_ATTR_MAX + 1];
|
|
if (!info->attrs[IPVS_CMD_ATTR_DAEMON] ||
|
nla_parse_nested_deprecated(daemon_attrs, IPVS_DAEMON_ATTR_MAX, info->attrs[IPVS_CMD_ATTR_DAEMON], ip_vs_daemon_policy, info->extack))
|
goto out;
|
|
if (cmd == IPVS_CMD_NEW_DAEMON)
|
ret = ip_vs_genl_new_daemon(ipvs, daemon_attrs);
|
else
|
ret = ip_vs_genl_del_daemon(ipvs, daemon_attrs);
|
}
|
|
out:
|
return ret;
|
}
|
|
static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info)
|
{
|
bool need_full_svc = false, need_full_dest = false;
|
struct ip_vs_service *svc = NULL;
|
struct ip_vs_service_user_kern usvc;
|
struct ip_vs_dest_user_kern udest;
|
int ret = 0, cmd;
|
struct net *net = sock_net(skb->sk);
|
struct netns_ipvs *ipvs = net_ipvs(net);
|
|
cmd = info->genlhdr->cmd;
|
|
mutex_lock(&__ip_vs_mutex);
|
|
if (cmd == IPVS_CMD_FLUSH) {
|
ret = ip_vs_flush(ipvs, false);
|
goto out;
|
} else if (cmd == IPVS_CMD_SET_CONFIG) {
|
ret = ip_vs_genl_set_config(ipvs, info->attrs);
|
goto out;
|
} else if (cmd == IPVS_CMD_ZERO &&
|
!info->attrs[IPVS_CMD_ATTR_SERVICE]) {
|
ret = ip_vs_zero_all(ipvs);
|
goto out;
|
}
|
|
/* All following commands require a service argument, so check if we
|
* received a valid one. We need a full service specification when
|
* adding / editing a service. Only identifying members otherwise. */
|
if (cmd == IPVS_CMD_NEW_SERVICE || cmd == IPVS_CMD_SET_SERVICE)
|
need_full_svc = true;
|
|
ret = ip_vs_genl_parse_service(ipvs, &usvc,
|
info->attrs[IPVS_CMD_ATTR_SERVICE],
|
need_full_svc, &svc);
|
if (ret)
|
goto out;
|
|
/* Unless we're adding a new service, the service must already exist */
|
if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) {
|
ret = -ESRCH;
|
goto out;
|
}
|
|
/* Destination commands require a valid destination argument. For
|
* adding / editing a destination, we need a full destination
|
* specification. */
|
if (cmd == IPVS_CMD_NEW_DEST || cmd == IPVS_CMD_SET_DEST ||
|
cmd == IPVS_CMD_DEL_DEST) {
|
if (cmd != IPVS_CMD_DEL_DEST)
|
need_full_dest = true;
|
|
ret = ip_vs_genl_parse_dest(&udest,
|
info->attrs[IPVS_CMD_ATTR_DEST],
|
need_full_dest);
|
if (ret)
|
goto out;
|
|
/* Old protocols did not allow the user to specify address
|
* family, so we set it to zero instead. We also didn't
|
* allow heterogeneous pools in the old code, so it's safe
|
* to assume that this will have the same address family as
|
* the service.
|
*/
|
if (udest.af == 0)
|
udest.af = svc->af;
|
|
if (!ip_vs_is_af_valid(udest.af)) {
|
ret = -EAFNOSUPPORT;
|
goto out;
|
}
|
|
if (udest.af != svc->af && cmd != IPVS_CMD_DEL_DEST) {
|
/* The synchronization protocol is incompatible
|
* with mixed family services
|
*/
|
if (ipvs->sync_state) {
|
ret = -EINVAL;
|
goto out;
|
}
|
|
/* Which connection types do we support? */
|
switch (udest.conn_flags) {
|
case IP_VS_CONN_F_TUNNEL:
|
/* We are able to forward this */
|
break;
|
default:
|
ret = -EINVAL;
|
goto out;
|
}
|
}
|
}
|
|
switch (cmd) {
|
case IPVS_CMD_NEW_SERVICE:
|
if (svc == NULL)
|
ret = ip_vs_add_service(ipvs, &usvc, &svc);
|
else
|
ret = -EEXIST;
|
break;
|
case IPVS_CMD_SET_SERVICE:
|
ret = ip_vs_edit_service(svc, &usvc);
|
break;
|
case IPVS_CMD_DEL_SERVICE:
|
ret = ip_vs_del_service(svc);
|
/* do not use svc, it can be freed */
|
break;
|
case IPVS_CMD_NEW_DEST:
|
ret = ip_vs_add_dest(svc, &udest);
|
break;
|
case IPVS_CMD_SET_DEST:
|
ret = ip_vs_edit_dest(svc, &udest);
|
break;
|
case IPVS_CMD_DEL_DEST:
|
ret = ip_vs_del_dest(svc, &udest);
|
break;
|
case IPVS_CMD_ZERO:
|
ret = ip_vs_zero_service(svc);
|
break;
|
default:
|
ret = -EINVAL;
|
}
|
|
out:
|
mutex_unlock(&__ip_vs_mutex);
|
|
return ret;
|
}
|
|
static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info)
|
{
|
struct sk_buff *msg;
|
void *reply;
|
int ret, cmd, reply_cmd;
|
struct net *net = sock_net(skb->sk);
|
struct netns_ipvs *ipvs = net_ipvs(net);
|
|
cmd = info->genlhdr->cmd;
|
|
if (cmd == IPVS_CMD_GET_SERVICE)
|
reply_cmd = IPVS_CMD_NEW_SERVICE;
|
else if (cmd == IPVS_CMD_GET_INFO)
|
reply_cmd = IPVS_CMD_SET_INFO;
|
else if (cmd == IPVS_CMD_GET_CONFIG)
|
reply_cmd = IPVS_CMD_SET_CONFIG;
|
else {
|
pr_err("unknown Generic Netlink command\n");
|
return -EINVAL;
|
}
|
|
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
|
if (!msg)
|
return -ENOMEM;
|
|
mutex_lock(&__ip_vs_mutex);
|
|
reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd);
|
if (reply == NULL)
|
goto nla_put_failure;
|
|
switch (cmd) {
|
case IPVS_CMD_GET_SERVICE:
|
{
|
struct ip_vs_service *svc;
|
|
svc = ip_vs_genl_find_service(ipvs,
|
info->attrs[IPVS_CMD_ATTR_SERVICE]);
|
if (IS_ERR(svc)) {
|
ret = PTR_ERR(svc);
|
goto out_err;
|
} else if (svc) {
|
ret = ip_vs_genl_fill_service(msg, svc);
|
if (ret)
|
goto nla_put_failure;
|
} else {
|
ret = -ESRCH;
|
goto out_err;
|
}
|
|
break;
|
}
|
|
case IPVS_CMD_GET_CONFIG:
|
{
|
struct ip_vs_timeout_user t;
|
|
__ip_vs_get_timeouts(ipvs, &t);
|
#ifdef CONFIG_IP_VS_PROTO_TCP
|
if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP,
|
t.tcp_timeout) ||
|
nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,
|
t.tcp_fin_timeout))
|
goto nla_put_failure;
|
#endif
|
#ifdef CONFIG_IP_VS_PROTO_UDP
|
if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout))
|
goto nla_put_failure;
|
#endif
|
|
break;
|
}
|
|
case IPVS_CMD_GET_INFO:
|
if (nla_put_u32(msg, IPVS_INFO_ATTR_VERSION,
|
IP_VS_VERSION_CODE) ||
|
nla_put_u32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE,
|
ip_vs_conn_tab_size))
|
goto nla_put_failure;
|
break;
|
}
|
|
genlmsg_end(msg, reply);
|
ret = genlmsg_reply(msg, info);
|
goto out;
|
|
nla_put_failure:
|
pr_err("not enough space in Netlink message\n");
|
ret = -EMSGSIZE;
|
|
out_err:
|
nlmsg_free(msg);
|
out:
|
mutex_unlock(&__ip_vs_mutex);
|
|
return ret;
|
}
|
|
|
static const struct genl_small_ops ip_vs_genl_ops[] = {
|
{
|
.cmd = IPVS_CMD_NEW_SERVICE,
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
.flags = GENL_ADMIN_PERM,
|
.doit = ip_vs_genl_set_cmd,
|
},
|
{
|
.cmd = IPVS_CMD_SET_SERVICE,
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
.flags = GENL_ADMIN_PERM,
|
.doit = ip_vs_genl_set_cmd,
|
},
|
{
|
.cmd = IPVS_CMD_DEL_SERVICE,
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
.flags = GENL_ADMIN_PERM,
|
.doit = ip_vs_genl_set_cmd,
|
},
|
{
|
.cmd = IPVS_CMD_GET_SERVICE,
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
.flags = GENL_ADMIN_PERM,
|
.doit = ip_vs_genl_get_cmd,
|
.dumpit = ip_vs_genl_dump_services,
|
},
|
{
|
.cmd = IPVS_CMD_NEW_DEST,
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
.flags = GENL_ADMIN_PERM,
|
.doit = ip_vs_genl_set_cmd,
|
},
|
{
|
.cmd = IPVS_CMD_SET_DEST,
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
.flags = GENL_ADMIN_PERM,
|
.doit = ip_vs_genl_set_cmd,
|
},
|
{
|
.cmd = IPVS_CMD_DEL_DEST,
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
.flags = GENL_ADMIN_PERM,
|
.doit = ip_vs_genl_set_cmd,
|
},
|
{
|
.cmd = IPVS_CMD_GET_DEST,
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
.flags = GENL_ADMIN_PERM,
|
.dumpit = ip_vs_genl_dump_dests,
|
},
|
{
|
.cmd = IPVS_CMD_NEW_DAEMON,
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
.flags = GENL_ADMIN_PERM,
|
.doit = ip_vs_genl_set_daemon,
|
},
|
{
|
.cmd = IPVS_CMD_DEL_DAEMON,
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
.flags = GENL_ADMIN_PERM,
|
.doit = ip_vs_genl_set_daemon,
|
},
|
{
|
.cmd = IPVS_CMD_GET_DAEMON,
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
.flags = GENL_ADMIN_PERM,
|
.dumpit = ip_vs_genl_dump_daemons,
|
},
|
{
|
.cmd = IPVS_CMD_SET_CONFIG,
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
.flags = GENL_ADMIN_PERM,
|
.doit = ip_vs_genl_set_cmd,
|
},
|
{
|
.cmd = IPVS_CMD_GET_CONFIG,
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
.flags = GENL_ADMIN_PERM,
|
.doit = ip_vs_genl_get_cmd,
|
},
|
{
|
.cmd = IPVS_CMD_GET_INFO,
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
.flags = GENL_ADMIN_PERM,
|
.doit = ip_vs_genl_get_cmd,
|
},
|
{
|
.cmd = IPVS_CMD_ZERO,
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
.flags = GENL_ADMIN_PERM,
|
.doit = ip_vs_genl_set_cmd,
|
},
|
{
|
.cmd = IPVS_CMD_FLUSH,
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
.flags = GENL_ADMIN_PERM,
|
.doit = ip_vs_genl_set_cmd,
|
},
|
};
|
|
static struct genl_family ip_vs_genl_family __ro_after_init = {
|
.hdrsize = 0,
|
.name = IPVS_GENL_NAME,
|
.version = IPVS_GENL_VERSION,
|
.maxattr = IPVS_CMD_ATTR_MAX,
|
.policy = ip_vs_cmd_policy,
|
.netnsok = true, /* Make ipvsadm to work on netns */
|
.module = THIS_MODULE,
|
.small_ops = ip_vs_genl_ops,
|
.n_small_ops = ARRAY_SIZE(ip_vs_genl_ops),
|
};
|
|
static int __init ip_vs_genl_register(void)
|
{
|
return genl_register_family(&ip_vs_genl_family);
|
}
|
|
static void ip_vs_genl_unregister(void)
|
{
|
genl_unregister_family(&ip_vs_genl_family);
|
}
|
|
/* End of Generic Netlink interface definitions */
|
|
/*
|
* per netns intit/exit func.
|
*/
|
#ifdef CONFIG_SYSCTL
|
static int __net_init ip_vs_control_net_init_sysctl(struct netns_ipvs *ipvs)
|
{
|
struct net *net = ipvs->net;
|
int idx;
|
struct ctl_table *tbl;
|
|
atomic_set(&ipvs->dropentry, 0);
|
spin_lock_init(&ipvs->dropentry_lock);
|
spin_lock_init(&ipvs->droppacket_lock);
|
spin_lock_init(&ipvs->securetcp_lock);
|
|
if (!net_eq(net, &init_net)) {
|
tbl = kmemdup(vs_vars, sizeof(vs_vars), GFP_KERNEL);
|
if (tbl == NULL)
|
return -ENOMEM;
|
|
/* Don't export sysctls to unprivileged users */
|
if (net->user_ns != &init_user_ns)
|
tbl[0].procname = NULL;
|
} else
|
tbl = vs_vars;
|
/* Initialize sysctl defaults */
|
for (idx = 0; idx < ARRAY_SIZE(vs_vars); idx++) {
|
if (tbl[idx].proc_handler == proc_do_defense_mode)
|
tbl[idx].extra2 = ipvs;
|
}
|
idx = 0;
|
ipvs->sysctl_amemthresh = 1024;
|
tbl[idx++].data = &ipvs->sysctl_amemthresh;
|
ipvs->sysctl_am_droprate = 10;
|
tbl[idx++].data = &ipvs->sysctl_am_droprate;
|
tbl[idx++].data = &ipvs->sysctl_drop_entry;
|
tbl[idx++].data = &ipvs->sysctl_drop_packet;
|
#ifdef CONFIG_IP_VS_NFCT
|
tbl[idx++].data = &ipvs->sysctl_conntrack;
|
#endif
|
tbl[idx++].data = &ipvs->sysctl_secure_tcp;
|
ipvs->sysctl_snat_reroute = 1;
|
tbl[idx++].data = &ipvs->sysctl_snat_reroute;
|
ipvs->sysctl_sync_ver = 1;
|
tbl[idx++].data = &ipvs->sysctl_sync_ver;
|
ipvs->sysctl_sync_ports = 1;
|
tbl[idx++].data = &ipvs->sysctl_sync_ports;
|
tbl[idx++].data = &ipvs->sysctl_sync_persist_mode;
|
ipvs->sysctl_sync_qlen_max = nr_free_buffer_pages() / 32;
|
tbl[idx++].data = &ipvs->sysctl_sync_qlen_max;
|
ipvs->sysctl_sync_sock_size = 0;
|
tbl[idx++].data = &ipvs->sysctl_sync_sock_size;
|
tbl[idx++].data = &ipvs->sysctl_cache_bypass;
|
tbl[idx++].data = &ipvs->sysctl_expire_nodest_conn;
|
tbl[idx++].data = &ipvs->sysctl_sloppy_tcp;
|
tbl[idx++].data = &ipvs->sysctl_sloppy_sctp;
|
tbl[idx++].data = &ipvs->sysctl_expire_quiescent_template;
|
ipvs->sysctl_sync_threshold[0] = DEFAULT_SYNC_THRESHOLD;
|
ipvs->sysctl_sync_threshold[1] = DEFAULT_SYNC_PERIOD;
|
tbl[idx].data = &ipvs->sysctl_sync_threshold;
|
tbl[idx].extra2 = ipvs;
|
tbl[idx++].maxlen = sizeof(ipvs->sysctl_sync_threshold);
|
ipvs->sysctl_sync_refresh_period = DEFAULT_SYNC_REFRESH_PERIOD;
|
tbl[idx++].data = &ipvs->sysctl_sync_refresh_period;
|
ipvs->sysctl_sync_retries = clamp_t(int, DEFAULT_SYNC_RETRIES, 0, 3);
|
tbl[idx++].data = &ipvs->sysctl_sync_retries;
|
tbl[idx++].data = &ipvs->sysctl_nat_icmp_send;
|
ipvs->sysctl_pmtu_disc = 1;
|
tbl[idx++].data = &ipvs->sysctl_pmtu_disc;
|
tbl[idx++].data = &ipvs->sysctl_backup_only;
|
ipvs->sysctl_conn_reuse_mode = 1;
|
tbl[idx++].data = &ipvs->sysctl_conn_reuse_mode;
|
tbl[idx++].data = &ipvs->sysctl_schedule_icmp;
|
tbl[idx++].data = &ipvs->sysctl_ignore_tunneled;
|
#ifdef CONFIG_IP_VS_DEBUG
|
/* Global sysctls must be ro in non-init netns */
|
if (!net_eq(net, &init_net))
|
tbl[idx++].mode = 0444;
|
#endif
|
|
ipvs->sysctl_hdr = register_net_sysctl(net, "net/ipv4/vs", tbl);
|
if (ipvs->sysctl_hdr == NULL) {
|
if (!net_eq(net, &init_net))
|
kfree(tbl);
|
return -ENOMEM;
|
}
|
ip_vs_start_estimator(ipvs, &ipvs->tot_stats);
|
ipvs->sysctl_tbl = tbl;
|
/* Schedule defense work */
|
INIT_DELAYED_WORK(&ipvs->defense_work, defense_work_handler);
|
queue_delayed_work(system_long_wq, &ipvs->defense_work,
|
DEFENSE_TIMER_PERIOD);
|
|
/* Init delayed work for expiring no dest conn */
|
INIT_DELAYED_WORK(&ipvs->expire_nodest_conn_work,
|
expire_nodest_conn_handler);
|
|
return 0;
|
}
|
|
static void __net_exit ip_vs_control_net_cleanup_sysctl(struct netns_ipvs *ipvs)
|
{
|
struct net *net = ipvs->net;
|
|
cancel_delayed_work_sync(&ipvs->expire_nodest_conn_work);
|
cancel_delayed_work_sync(&ipvs->defense_work);
|
cancel_work_sync(&ipvs->defense_work.work);
|
unregister_net_sysctl_table(ipvs->sysctl_hdr);
|
ip_vs_stop_estimator(ipvs, &ipvs->tot_stats);
|
|
if (!net_eq(net, &init_net))
|
kfree(ipvs->sysctl_tbl);
|
}
|
|
#else
|
|
static int __net_init ip_vs_control_net_init_sysctl(struct netns_ipvs *ipvs) { return 0; }
|
static void __net_exit ip_vs_control_net_cleanup_sysctl(struct netns_ipvs *ipvs) { }
|
|
#endif
|
|
static struct notifier_block ip_vs_dst_notifier = {
|
.notifier_call = ip_vs_dst_event,
|
#ifdef CONFIG_IP_VS_IPV6
|
.priority = ADDRCONF_NOTIFY_PRIORITY + 5,
|
#endif
|
};
|
|
int __net_init ip_vs_control_net_init(struct netns_ipvs *ipvs)
|
{
|
int i, idx;
|
|
/* Initialize rs_table */
|
for (idx = 0; idx < IP_VS_RTAB_SIZE; idx++)
|
INIT_HLIST_HEAD(&ipvs->rs_table[idx]);
|
|
INIT_LIST_HEAD(&ipvs->dest_trash);
|
spin_lock_init(&ipvs->dest_trash_lock);
|
timer_setup(&ipvs->dest_trash_timer, ip_vs_dest_trash_expire, 0);
|
atomic_set(&ipvs->ftpsvc_counter, 0);
|
atomic_set(&ipvs->nullsvc_counter, 0);
|
atomic_set(&ipvs->conn_out_counter, 0);
|
|
/* procfs stats */
|
ipvs->tot_stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
|
if (!ipvs->tot_stats.cpustats)
|
return -ENOMEM;
|
|
for_each_possible_cpu(i) {
|
struct ip_vs_cpu_stats *ipvs_tot_stats;
|
ipvs_tot_stats = per_cpu_ptr(ipvs->tot_stats.cpustats, i);
|
u64_stats_init(&ipvs_tot_stats->syncp);
|
}
|
|
spin_lock_init(&ipvs->tot_stats.lock);
|
|
#ifdef CONFIG_PROC_FS
|
if (!proc_create_net("ip_vs", 0, ipvs->net->proc_net,
|
&ip_vs_info_seq_ops, sizeof(struct ip_vs_iter)))
|
goto err_vs;
|
if (!proc_create_net_single("ip_vs_stats", 0, ipvs->net->proc_net,
|
ip_vs_stats_show, NULL))
|
goto err_stats;
|
if (!proc_create_net_single("ip_vs_stats_percpu", 0,
|
ipvs->net->proc_net,
|
ip_vs_stats_percpu_show, NULL))
|
goto err_percpu;
|
#endif
|
|
if (ip_vs_control_net_init_sysctl(ipvs))
|
goto err;
|
|
return 0;
|
|
err:
|
#ifdef CONFIG_PROC_FS
|
remove_proc_entry("ip_vs_stats_percpu", ipvs->net->proc_net);
|
|
err_percpu:
|
remove_proc_entry("ip_vs_stats", ipvs->net->proc_net);
|
|
err_stats:
|
remove_proc_entry("ip_vs", ipvs->net->proc_net);
|
|
err_vs:
|
#endif
|
free_percpu(ipvs->tot_stats.cpustats);
|
return -ENOMEM;
|
}
|
|
void __net_exit ip_vs_control_net_cleanup(struct netns_ipvs *ipvs)
|
{
|
ip_vs_trash_cleanup(ipvs);
|
ip_vs_control_net_cleanup_sysctl(ipvs);
|
#ifdef CONFIG_PROC_FS
|
remove_proc_entry("ip_vs_stats_percpu", ipvs->net->proc_net);
|
remove_proc_entry("ip_vs_stats", ipvs->net->proc_net);
|
remove_proc_entry("ip_vs", ipvs->net->proc_net);
|
#endif
|
free_percpu(ipvs->tot_stats.cpustats);
|
}
|
|
int __init ip_vs_register_nl_ioctl(void)
|
{
|
int ret;
|
|
ret = nf_register_sockopt(&ip_vs_sockopts);
|
if (ret) {
|
pr_err("cannot register sockopt.\n");
|
goto err_sock;
|
}
|
|
ret = ip_vs_genl_register();
|
if (ret) {
|
pr_err("cannot register Generic Netlink interface.\n");
|
goto err_genl;
|
}
|
return 0;
|
|
err_genl:
|
nf_unregister_sockopt(&ip_vs_sockopts);
|
err_sock:
|
return ret;
|
}
|
|
void ip_vs_unregister_nl_ioctl(void)
|
{
|
ip_vs_genl_unregister();
|
nf_unregister_sockopt(&ip_vs_sockopts);
|
}
|
|
int __init ip_vs_control_init(void)
|
{
|
int idx;
|
int ret;
|
|
EnterFunction(2);
|
|
/* Initialize svc_table, ip_vs_svc_fwm_table */
|
for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
|
INIT_HLIST_HEAD(&ip_vs_svc_table[idx]);
|
INIT_HLIST_HEAD(&ip_vs_svc_fwm_table[idx]);
|
}
|
|
smp_wmb(); /* Do we really need it now ? */
|
|
ret = register_netdevice_notifier(&ip_vs_dst_notifier);
|
if (ret < 0)
|
return ret;
|
|
LeaveFunction(2);
|
return 0;
|
}
|
|
|
void ip_vs_control_cleanup(void)
|
{
|
EnterFunction(2);
|
unregister_netdevice_notifier(&ip_vs_dst_notifier);
|
LeaveFunction(2);
|
}
|
