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Commit 7937df15 authored by Julius Volz's avatar Julius Volz Committed by Simon Horman
Browse files

IPVS: Convert real server lookup functions 



Convert functions for looking up destinations (real servers) to support
IPv6 services/dests.

Signed-off-by: default avatarJulius Volz <juliusv@google.com>
Signed-off-by: default avatarSimon Horman <horms@verge.net.au>
parent 2a3b791e

include/net/ip_vs.h

+5 −3
Original line number Diff line number Diff line
@@ -804,14 +804,16 @@ static inline void ip_vs_service_put(struct ip_vs_service *svc) 
}



extern struct ip_vs_dest *

ip_vs_lookup_real_service(__u16 protocol, __be32 daddr, __be16 dport);

ip_vs_lookup_real_service(int af, __u16 protocol,

			  const union nf_inet_addr *daddr, __be16 dport);



extern int ip_vs_use_count_inc(void);

extern void ip_vs_use_count_dec(void);

extern int ip_vs_control_init(void);

extern void ip_vs_control_cleanup(void);

extern struct ip_vs_dest *

ip_vs_find_dest(__be32 daddr, __be16 dport,

		 __be32 vaddr, __be16 vport, __u16 protocol);

ip_vs_find_dest(int af, const union nf_inet_addr *daddr, __be16 dport,

		const union nf_inet_addr *vaddr, __be16 vport, __u16 protocol);

extern struct ip_vs_dest *ip_vs_try_bind_dest(struct ip_vs_conn *cp);

net/ipv4/ipvs/ip_vs_conn.c

+3 −2
Original line number Diff line number Diff line
@@ -491,8 +491,9 @@ struct ip_vs_dest *ip_vs_try_bind_dest(struct ip_vs_conn *cp) 
	struct ip_vs_dest *dest;



	if ((cp) && (!cp->dest)) {

		dest = ip_vs_find_dest(cp->daddr.ip, cp->dport,

				       cp->vaddr.ip, cp->vport, cp->protocol);

		dest = ip_vs_find_dest(cp->af, &cp->daddr, cp->dport,

				       &cp->vaddr, cp->vport,

				       cp->protocol);

		ip_vs_bind_dest(cp, dest);

		return dest;

	} else

net/ipv4/ipvs/ip_vs_core.c

+2 −2
Original line number Diff line number Diff line
@@ -957,8 +957,8 @@ ip_vs_out(unsigned int hooknum, struct sk_buff *skb, 
						  sizeof(_ports), _ports);

			if (pptr == NULL)

				return NF_ACCEPT;	/* Not for me */

			if (ip_vs_lookup_real_service(iph.protocol,

						      iph.saddr.ip,

			if (ip_vs_lookup_real_service(af, iph.protocol,

						      &iph.saddr,

						      pptr[0])) {

				/*

				 * Notify the real server: there is no

net/ipv4/ipvs/ip_vs_ctl.c

+52 −28
Original line number Diff line number Diff line
@@ -492,11 +492,20 @@ __ip_vs_unbind_svc(struct ip_vs_dest *dest) 
/*

 *	Returns hash value for real service

 */

static __inline__ unsigned ip_vs_rs_hashkey(__be32 addr, __be16 port)

static inline unsigned ip_vs_rs_hashkey(int af,

					    const union nf_inet_addr *addr,

					    __be16 port)

{

	register unsigned porth = ntohs(port);

	__be32 addr_fold = addr->ip;



	return (ntohl(addr)^(porth>>IP_VS_RTAB_BITS)^porth)

#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;

}
@@ -516,7 +525,8 @@ static int ip_vs_rs_hash(struct ip_vs_dest *dest) 
	 *	Hash by proto,addr,port,

	 *	which are the parameters of the real service.

	 */

	hash = ip_vs_rs_hashkey(dest->addr.ip, dest->port);

	hash = ip_vs_rs_hashkey(dest->af, &dest->addr, dest->port);



	list_add(&dest->d_list, &ip_vs_rtable[hash]);



	return 1;
@@ -543,7 +553,9 @@ static int ip_vs_rs_unhash(struct ip_vs_dest *dest) 
 *	Lookup real service by <proto,addr,port> in the real service table.

 */

struct ip_vs_dest *

ip_vs_lookup_real_service(__u16 protocol, __be32 daddr, __be16 dport)

ip_vs_lookup_real_service(int af, __u16 protocol,

			  const union nf_inet_addr *daddr,

			  __be16 dport)

{

	unsigned hash;

	struct ip_vs_dest *dest;
@@ -552,11 +564,12 @@ ip_vs_lookup_real_service(__u16 protocol, __be32 daddr, __be16 dport) 
	 *	Check for "full" addressed entries

	 *	Return the first found entry

	 */

	hash = ip_vs_rs_hashkey(daddr, dport);

	hash = ip_vs_rs_hashkey(af, daddr, dport);



	read_lock(&__ip_vs_rs_lock);

	list_for_each_entry(dest, &ip_vs_rtable[hash], d_list) {

		if ((dest->addr.ip == daddr)

		if ((dest->af == af)

		    && ip_vs_addr_equal(af, &dest->addr, daddr)

		    && (dest->port == dport)

		    && ((dest->protocol == protocol) ||

			dest->vfwmark)) {
@@ -574,7 +587,8 @@ ip_vs_lookup_real_service(__u16 protocol, __be32 daddr, __be16 dport) 
 *	Lookup destination by {addr,port} in the given service

 */

static struct ip_vs_dest *

ip_vs_lookup_dest(struct ip_vs_service *svc, __be32 daddr, __be16 dport)

ip_vs_lookup_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr,

		  __be16 dport)

{

	struct ip_vs_dest *dest;
@@ -582,7 +596,9 @@ ip_vs_lookup_dest(struct ip_vs_service *svc, __be32 daddr, __be16 dport) 
	 * Find the destination for the given service

	 */

	list_for_each_entry(dest, &svc->destinations, n_list) {

		if ((dest->addr.ip == daddr) && (dest->port == dport)) {

		if ((dest->af == svc->af)

		    && ip_vs_addr_equal(svc->af, &dest->addr, daddr)

		    && (dest->port == dport)) {

			/* HIT */

			return dest;

		}
@@ -601,14 +617,15 @@ ip_vs_lookup_dest(struct ip_vs_service *svc, __be32 daddr, __be16 dport) 
 * ip_vs_lookup_real_service() looked promissing, but

 * seems not working as expected.

 */

struct ip_vs_dest *ip_vs_find_dest(__be32 daddr, __be16 dport,

				    __be32 vaddr, __be16 vport, __u16 protocol)

struct ip_vs_dest *ip_vs_find_dest(int af, const union nf_inet_addr *daddr,

				   __be16 dport,

				   const union nf_inet_addr *vaddr,

				   __be16 vport, __u16 protocol)

{

	struct ip_vs_dest *dest;

	struct ip_vs_service *svc;

	union nf_inet_addr _vaddr = { .ip = vaddr };



	svc = ip_vs_service_get(AF_INET, 0, protocol, &_vaddr, vport);

	svc = ip_vs_service_get(af, 0, protocol, vaddr, vport);

	if (!svc)

		return NULL;

	dest = ip_vs_lookup_dest(svc, daddr, dport);
@@ -629,7 +646,8 @@ struct ip_vs_dest *ip_vs_find_dest(__be32 daddr, __be16 dport, 
 *  scheduling.

 */

static struct ip_vs_dest *

ip_vs_trash_get_dest(struct ip_vs_service *svc, __be32 daddr, __be16 dport)

ip_vs_trash_get_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr,

		     __be16 dport)

{

	struct ip_vs_dest *dest, *nxt;
@@ -637,17 +655,19 @@ ip_vs_trash_get_dest(struct ip_vs_service *svc, __be32 daddr, __be16 dport) 
	 * Find the destination in trash

	 */

	list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) {

		IP_VS_DBG(3, "Destination %u/%u.%u.%u.%u:%u still in trash, "

		IP_VS_DBG_BUF(3, "Destination %u/%s:%u still in trash, "

			      "dest->refcnt=%d\n",

			      dest->vfwmark,

			  NIPQUAD(dest->addr.ip), ntohs(dest->port),

			      IP_VS_DBG_ADDR(svc->af, &dest->addr),

			      ntohs(dest->port),

			      atomic_read(&dest->refcnt));

		if (dest->addr.ip == daddr &&

		if (dest->af == svc->af &&

		    ip_vs_addr_equal(svc->af, &dest->addr, daddr) &&

		    dest->port == dport &&

		    dest->vfwmark == svc->fwmark &&

		    dest->protocol == svc->protocol &&

		    (svc->fwmark ||

		     (dest->vaddr.ip == svc->addr.ip &&

		     (ip_vs_addr_equal(svc->af, &dest->vaddr, &svc->addr) &&

		      dest->vport == svc->port))) {

			/* HIT */

			return dest;
@@ -657,10 +677,11 @@ ip_vs_trash_get_dest(struct ip_vs_service *svc, __be32 daddr, __be16 dport) 
		 * Try to purge the destination from trash if not referenced

		 */

		if (atomic_read(&dest->refcnt) == 1) {

			IP_VS_DBG(3, "Removing destination %u/%u.%u.%u.%u:%u "

			IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u "

				      "from trash\n",

				      dest->vfwmark,

				  NIPQUAD(dest->addr.ip), ntohs(dest->port));

				      IP_VS_DBG_ADDR(svc->af, &dest->addr),

				      ntohs(dest->port));

			list_del(&dest->n_list);

			ip_vs_dst_reset(dest);

			__ip_vs_unbind_svc(dest);
@@ -847,7 +868,8 @@ ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest) 
	/*

	 * Check if the dest already exists in the list

	 */

	dest = ip_vs_lookup_dest(svc, daddr.ip, dport);

	dest = ip_vs_lookup_dest(svc, &daddr, dport);



	if (dest != NULL) {

		IP_VS_DBG(1, "ip_vs_add_dest(): dest already exists\n");

		return -EEXIST;
@@ -857,7 +879,8 @@ ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest) 
	 * Check if the dest already exists in the trash and

	 * is from the same service

	 */

	dest = ip_vs_trash_get_dest(svc, daddr.ip, dport);

	dest = ip_vs_trash_get_dest(svc, &daddr, dport);



	if (dest != NULL) {

		IP_VS_DBG(3, "Get destination %u.%u.%u.%u:%u from trash, "

			  "dest->refcnt=%d, service %u/%u.%u.%u.%u:%u\n",
@@ -956,7 +979,8 @@ ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest) 
	/*

	 *  Lookup the destination list

	 */

	dest = ip_vs_lookup_dest(svc, daddr.ip, dport);

	dest = ip_vs_lookup_dest(svc, &daddr, dport);



	if (dest == NULL) {

		IP_VS_DBG(1, "ip_vs_edit_dest(): dest doesn't exist\n");

		return -ENOENT;
@@ -1054,7 +1078,7 @@ ip_vs_del_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest) 


	EnterFunction(2);



	dest = ip_vs_lookup_dest(svc, udest->addr.ip, dport);

	dest = ip_vs_lookup_dest(svc, &udest->addr, dport);



	if (dest == NULL) {

		IP_VS_DBG(1, "ip_vs_del_dest(): destination not found!\n");

net/ipv4/ipvs/ip_vs_sync.c

+5 −2
Original line number Diff line number Diff line
@@ -383,8 +383,11 @@ static void ip_vs_process_message(const char *buffer, const size_t buflen) 
			 * If it is not found the connection will remain unbound

			 * but still handled.

			 */

			dest = ip_vs_find_dest(s->daddr, s->dport,

					       s->vaddr, s->vport,

			dest = ip_vs_find_dest(AF_INET,

					       (union nf_inet_addr *)&s->daddr,

					       s->dport,

					       (union nf_inet_addr *)&s->vaddr,

					       s->vport,

					       s->protocol);

			/*  Set the approprite ativity flag */

			if (s->protocol == IPPROTO_TCP) {