diff options
| -rw-r--r-- | include/net/ip_vs.h | 3 | ||||
| -rw-r--r-- | net/netfilter/ipvs/ip_vs_core.c | 34 | ||||
| -rw-r--r-- | net/netfilter/ipvs/ip_vs_proto_sctp.c | 6 | ||||
| -rw-r--r-- | net/netfilter/ipvs/ip_vs_proto_tcp.c | 7 | ||||
| -rw-r--r-- | net/netfilter/ipvs/ip_vs_proto_udp.c | 6 |
5 files changed, 47 insertions, 9 deletions
diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h index 0e4618470cee..9d5c1b965304 100644 --- a/include/net/ip_vs.h +++ b/include/net/ip_vs.h @@ -849,7 +849,8 @@ extern int ip_vs_unbind_scheduler(struct ip_vs_service *svc); extern struct ip_vs_scheduler *ip_vs_scheduler_get(const char *sched_name); extern void ip_vs_scheduler_put(struct ip_vs_scheduler *scheduler); extern struct ip_vs_conn * -ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb); +ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb, + struct ip_vs_protocol *pp, int *ignored); extern int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb, struct ip_vs_protocol *pp); diff --git a/net/netfilter/ipvs/ip_vs_core.c b/net/netfilter/ipvs/ip_vs_core.c index 222453029b9e..0090d6d25e95 100644 --- a/net/netfilter/ipvs/ip_vs_core.c +++ b/net/netfilter/ipvs/ip_vs_core.c @@ -342,7 +342,8 @@ ip_vs_sched_persist(struct ip_vs_service *svc, * Protocols supported: TCP, UDP */ struct ip_vs_conn * -ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb) +ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb, + struct ip_vs_protocol *pp, int *ignored) { struct ip_vs_conn *cp = NULL; struct ip_vs_iphdr iph; @@ -350,16 +351,43 @@ ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb) __be16 _ports[2], *pptr; unsigned int flags; + *ignored = 1; ip_vs_fill_iphdr(svc->af, skb_network_header(skb), &iph); pptr = skb_header_pointer(skb, iph.len, sizeof(_ports), _ports); if (pptr == NULL) return NULL; /* + * FTPDATA needs this check when using local real server. + * Never schedule Active FTPDATA connections from real server. + * For LVS-NAT they must be already created. For other methods + * with persistence the connection is created on SYN+ACK. + */ + if (pptr[0] == FTPDATA) { + IP_VS_DBG_PKT(12, pp, skb, 0, "Not scheduling FTPDATA"); + return NULL; + } + + /* + * Do not schedule replies from local real server. It is risky + * for fwmark services but mostly for persistent services. + */ + if ((!skb->dev || skb->dev->flags & IFF_LOOPBACK) && + (svc->flags & IP_VS_SVC_F_PERSISTENT || svc->fwmark) && + (cp = pp->conn_in_get(svc->af, skb, pp, &iph, iph.len, 1))) { + IP_VS_DBG_PKT(12, pp, skb, 0, + "Not scheduling reply for existing connection"); + __ip_vs_conn_put(cp); + return NULL; + } + + /* * Persistent service */ - if (svc->flags & IP_VS_SVC_F_PERSISTENT) + if (svc->flags & IP_VS_SVC_F_PERSISTENT) { + *ignored = 0; return ip_vs_sched_persist(svc, skb, pptr); + } /* * Non-persistent service @@ -372,6 +400,8 @@ ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb) return NULL; } + *ignored = 0; + dest = svc->scheduler->schedule(svc, skb); if (dest == NULL) { IP_VS_DBG(1, "Schedule: no dest found.\n"); diff --git a/net/netfilter/ipvs/ip_vs_proto_sctp.c b/net/netfilter/ipvs/ip_vs_proto_sctp.c index 4c0855cb006e..9ab5232ce019 100644 --- a/net/netfilter/ipvs/ip_vs_proto_sctp.c +++ b/net/netfilter/ipvs/ip_vs_proto_sctp.c @@ -31,6 +31,8 @@ sctp_conn_schedule(int af, struct sk_buff *skb, struct ip_vs_protocol *pp, if ((sch->type == SCTP_CID_INIT) && (svc = ip_vs_service_get(af, skb->mark, iph.protocol, &iph.daddr, sh->dest))) { + int ignored; + if (ip_vs_todrop()) { /* * It seems that we are very loaded. @@ -44,8 +46,8 @@ sctp_conn_schedule(int af, struct sk_buff *skb, struct ip_vs_protocol *pp, * Let the virtual server select a real server for the * incoming connection, and create a connection entry. */ - *cpp = ip_vs_schedule(svc, skb); - if (!*cpp) { + *cpp = ip_vs_schedule(svc, skb, pp, &ignored); + if (!*cpp && !ignored) { *verdict = ip_vs_leave(svc, skb, pp); return 0; } diff --git a/net/netfilter/ipvs/ip_vs_proto_tcp.c b/net/netfilter/ipvs/ip_vs_proto_tcp.c index 64dc2954cf78..85d80a66b492 100644 --- a/net/netfilter/ipvs/ip_vs_proto_tcp.c +++ b/net/netfilter/ipvs/ip_vs_proto_tcp.c @@ -43,9 +43,12 @@ tcp_conn_schedule(int af, struct sk_buff *skb, struct ip_vs_protocol *pp, return 0; } + /* No !th->ack check to allow scheduling on SYN+ACK for Active FTP */ if (th->syn && (svc = ip_vs_service_get(af, skb->mark, iph.protocol, &iph.daddr, th->dest))) { + int ignored; + if (ip_vs_todrop()) { /* * It seems that we are very loaded. @@ -60,8 +63,8 @@ tcp_conn_schedule(int af, struct sk_buff *skb, struct ip_vs_protocol *pp, * Let the virtual server select a real server for the * incoming connection, and create a connection entry. */ - *cpp = ip_vs_schedule(svc, skb); - if (!*cpp) { + *cpp = ip_vs_schedule(svc, skb, pp, &ignored); + if (!*cpp && !ignored) { *verdict = ip_vs_leave(svc, skb, pp); return 0; } diff --git a/net/netfilter/ipvs/ip_vs_proto_udp.c b/net/netfilter/ipvs/ip_vs_proto_udp.c index 9c558c40bfbb..5d21f08155ed 100644 --- a/net/netfilter/ipvs/ip_vs_proto_udp.c +++ b/net/netfilter/ipvs/ip_vs_proto_udp.c @@ -46,6 +46,8 @@ udp_conn_schedule(int af, struct sk_buff *skb, struct ip_vs_protocol *pp, svc = ip_vs_service_get(af, skb->mark, iph.protocol, &iph.daddr, uh->dest); if (svc) { + int ignored; + if (ip_vs_todrop()) { /* * It seems that we are very loaded. @@ -60,8 +62,8 @@ udp_conn_schedule(int af, struct sk_buff *skb, struct ip_vs_protocol *pp, * Let the virtual server select a real server for the * incoming connection, and create a connection entry. */ - *cpp = ip_vs_schedule(svc, skb); - if (!*cpp) { + *cpp = ip_vs_schedule(svc, skb, pp, &ignored); + if (!*cpp && !ignored) { *verdict = ip_vs_leave(svc, skb, pp); return 0; } |