Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * IPVS An implementation of the IP virtual server support for the |
| 3 | * LINUX operating system. IPVS is now implemented as a module |
| 4 | * over the Netfilter framework. IPVS can be used to build a |
| 5 | * high-performance and highly available server based on a |
| 6 | * cluster of servers. |
| 7 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * Authors: Wensong Zhang <wensong@linuxvirtualserver.org> |
| 9 | * Peter Kese <peter.kese@ijs.si> |
| 10 | * Julian Anastasov <ja@ssi.bg> |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or |
| 13 | * modify it under the terms of the GNU General Public License |
| 14 | * as published by the Free Software Foundation; either version |
| 15 | * 2 of the License, or (at your option) any later version. |
| 16 | * |
| 17 | * The IPVS code for kernel 2.2 was done by Wensong Zhang and Peter Kese, |
| 18 | * with changes/fixes from Julian Anastasov, Lars Marowsky-Bree, Horms |
| 19 | * and others. |
| 20 | * |
| 21 | * Changes: |
| 22 | * Paul `Rusty' Russell properly handle non-linear skbs |
Harald Welte | 6869c4d | 2005-08-09 19:24:19 -0700 | [diff] [blame] | 23 | * Harald Welte don't use nfcache |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | * |
| 25 | */ |
| 26 | |
Hannes Eder | 9aada7a | 2009-07-30 14:29:44 -0700 | [diff] [blame] | 27 | #define KMSG_COMPONENT "IPVS" |
| 28 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt |
| 29 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/module.h> |
| 31 | #include <linux/kernel.h> |
| 32 | #include <linux/ip.h> |
| 33 | #include <linux/tcp.h> |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 34 | #include <linux/sctp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/icmp.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 36 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
| 38 | #include <net/ip.h> |
| 39 | #include <net/tcp.h> |
| 40 | #include <net/udp.h> |
| 41 | #include <net/icmp.h> /* for icmp_send */ |
| 42 | #include <net/route.h> |
Stephen Rothwell | 2c70b51 | 2010-08-29 17:04:53 +0000 | [diff] [blame] | 43 | #include <net/ip6_checksum.h> |
Hans Schillstrom | 61b1ab4 | 2011-01-03 14:44:42 +0100 | [diff] [blame] | 44 | #include <net/netns/generic.h> /* net_generic() */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
| 46 | #include <linux/netfilter.h> |
| 47 | #include <linux/netfilter_ipv4.h> |
| 48 | |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 49 | #ifdef CONFIG_IP_VS_IPV6 |
| 50 | #include <net/ipv6.h> |
| 51 | #include <linux/netfilter_ipv6.h> |
Julian Anastasov | 489fded | 2010-10-17 16:27:31 +0300 | [diff] [blame] | 52 | #include <net/ip6_route.h> |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 53 | #endif |
| 54 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | #include <net/ip_vs.h> |
| 56 | |
| 57 | |
| 58 | EXPORT_SYMBOL(register_ip_vs_scheduler); |
| 59 | EXPORT_SYMBOL(unregister_ip_vs_scheduler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | EXPORT_SYMBOL(ip_vs_proto_name); |
| 61 | EXPORT_SYMBOL(ip_vs_conn_new); |
| 62 | EXPORT_SYMBOL(ip_vs_conn_in_get); |
| 63 | EXPORT_SYMBOL(ip_vs_conn_out_get); |
| 64 | #ifdef CONFIG_IP_VS_PROTO_TCP |
| 65 | EXPORT_SYMBOL(ip_vs_tcp_conn_listen); |
| 66 | #endif |
| 67 | EXPORT_SYMBOL(ip_vs_conn_put); |
| 68 | #ifdef CONFIG_IP_VS_DEBUG |
| 69 | EXPORT_SYMBOL(ip_vs_get_debug_level); |
| 70 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | |
Hans Schillstrom | 61b1ab4 | 2011-01-03 14:44:42 +0100 | [diff] [blame] | 72 | int ip_vs_net_id __read_mostly; |
| 73 | #ifdef IP_VS_GENERIC_NETNS |
| 74 | EXPORT_SYMBOL(ip_vs_net_id); |
| 75 | #endif |
| 76 | /* netns cnt used for uniqueness */ |
| 77 | static atomic_t ipvs_netns_cnt = ATOMIC_INIT(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
| 79 | /* ID used in ICMP lookups */ |
| 80 | #define icmp_id(icmph) (((icmph)->un).echo.id) |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 81 | #define icmpv6_id(icmph) (icmph->icmp6_dataun.u_echo.identifier) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | |
| 83 | const char *ip_vs_proto_name(unsigned proto) |
| 84 | { |
| 85 | static char buf[20]; |
| 86 | |
| 87 | switch (proto) { |
| 88 | case IPPROTO_IP: |
| 89 | return "IP"; |
| 90 | case IPPROTO_UDP: |
| 91 | return "UDP"; |
| 92 | case IPPROTO_TCP: |
| 93 | return "TCP"; |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 94 | case IPPROTO_SCTP: |
| 95 | return "SCTP"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | case IPPROTO_ICMP: |
| 97 | return "ICMP"; |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 98 | #ifdef CONFIG_IP_VS_IPV6 |
| 99 | case IPPROTO_ICMPV6: |
| 100 | return "ICMPv6"; |
| 101 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | default: |
| 103 | sprintf(buf, "IP_%d", proto); |
| 104 | return buf; |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | void ip_vs_init_hash_table(struct list_head *table, int rows) |
| 109 | { |
| 110 | while (--rows >= 0) |
| 111 | INIT_LIST_HEAD(&table[rows]); |
| 112 | } |
| 113 | |
| 114 | static inline void |
| 115 | ip_vs_in_stats(struct ip_vs_conn *cp, struct sk_buff *skb) |
| 116 | { |
| 117 | struct ip_vs_dest *dest = cp->dest; |
Hans Schillstrom | b17fc99 | 2011-01-03 14:44:56 +0100 | [diff] [blame] | 118 | struct netns_ipvs *ipvs = net_ipvs(skb_net(skb)); |
| 119 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | if (dest && (dest->flags & IP_VS_DEST_F_AVAILABLE)) { |
Hans Schillstrom | b17fc99 | 2011-01-03 14:44:56 +0100 | [diff] [blame] | 121 | struct ip_vs_cpu_stats *s; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | |
Hans Schillstrom | b17fc99 | 2011-01-03 14:44:56 +0100 | [diff] [blame] | 123 | s = this_cpu_ptr(dest->stats.cpustats); |
| 124 | s->ustats.inpkts++; |
| 125 | u64_stats_update_begin(&s->syncp); |
| 126 | s->ustats.inbytes += skb->len; |
| 127 | u64_stats_update_end(&s->syncp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | |
Hans Schillstrom | b17fc99 | 2011-01-03 14:44:56 +0100 | [diff] [blame] | 129 | s = this_cpu_ptr(dest->svc->stats.cpustats); |
| 130 | s->ustats.inpkts++; |
| 131 | u64_stats_update_begin(&s->syncp); |
| 132 | s->ustats.inbytes += skb->len; |
| 133 | u64_stats_update_end(&s->syncp); |
| 134 | |
Julian Anastasov | 2a0751a | 2011-03-04 12:20:35 +0200 | [diff] [blame] | 135 | s = this_cpu_ptr(ipvs->tot_stats.cpustats); |
Hans Schillstrom | b17fc99 | 2011-01-03 14:44:56 +0100 | [diff] [blame] | 136 | s->ustats.inpkts++; |
| 137 | u64_stats_update_begin(&s->syncp); |
| 138 | s->ustats.inbytes += skb->len; |
| 139 | u64_stats_update_end(&s->syncp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | } |
| 141 | } |
| 142 | |
| 143 | |
| 144 | static inline void |
| 145 | ip_vs_out_stats(struct ip_vs_conn *cp, struct sk_buff *skb) |
| 146 | { |
| 147 | struct ip_vs_dest *dest = cp->dest; |
Hans Schillstrom | b17fc99 | 2011-01-03 14:44:56 +0100 | [diff] [blame] | 148 | struct netns_ipvs *ipvs = net_ipvs(skb_net(skb)); |
| 149 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | if (dest && (dest->flags & IP_VS_DEST_F_AVAILABLE)) { |
Hans Schillstrom | b17fc99 | 2011-01-03 14:44:56 +0100 | [diff] [blame] | 151 | struct ip_vs_cpu_stats *s; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | |
Hans Schillstrom | b17fc99 | 2011-01-03 14:44:56 +0100 | [diff] [blame] | 153 | s = this_cpu_ptr(dest->stats.cpustats); |
| 154 | s->ustats.outpkts++; |
| 155 | u64_stats_update_begin(&s->syncp); |
| 156 | s->ustats.outbytes += skb->len; |
| 157 | u64_stats_update_end(&s->syncp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | |
Hans Schillstrom | b17fc99 | 2011-01-03 14:44:56 +0100 | [diff] [blame] | 159 | s = this_cpu_ptr(dest->svc->stats.cpustats); |
| 160 | s->ustats.outpkts++; |
| 161 | u64_stats_update_begin(&s->syncp); |
| 162 | s->ustats.outbytes += skb->len; |
| 163 | u64_stats_update_end(&s->syncp); |
| 164 | |
Julian Anastasov | 2a0751a | 2011-03-04 12:20:35 +0200 | [diff] [blame] | 165 | s = this_cpu_ptr(ipvs->tot_stats.cpustats); |
Hans Schillstrom | b17fc99 | 2011-01-03 14:44:56 +0100 | [diff] [blame] | 166 | s->ustats.outpkts++; |
| 167 | u64_stats_update_begin(&s->syncp); |
| 168 | s->ustats.outbytes += skb->len; |
| 169 | u64_stats_update_end(&s->syncp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | } |
| 171 | } |
| 172 | |
| 173 | |
| 174 | static inline void |
| 175 | ip_vs_conn_stats(struct ip_vs_conn *cp, struct ip_vs_service *svc) |
| 176 | { |
Hans Schillstrom | b17fc99 | 2011-01-03 14:44:56 +0100 | [diff] [blame] | 177 | struct netns_ipvs *ipvs = net_ipvs(svc->net); |
| 178 | struct ip_vs_cpu_stats *s; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | |
Hans Schillstrom | b17fc99 | 2011-01-03 14:44:56 +0100 | [diff] [blame] | 180 | s = this_cpu_ptr(cp->dest->stats.cpustats); |
| 181 | s->ustats.conns++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | |
Hans Schillstrom | b17fc99 | 2011-01-03 14:44:56 +0100 | [diff] [blame] | 183 | s = this_cpu_ptr(svc->stats.cpustats); |
| 184 | s->ustats.conns++; |
| 185 | |
Julian Anastasov | 2a0751a | 2011-03-04 12:20:35 +0200 | [diff] [blame] | 186 | s = this_cpu_ptr(ipvs->tot_stats.cpustats); |
Hans Schillstrom | b17fc99 | 2011-01-03 14:44:56 +0100 | [diff] [blame] | 187 | s->ustats.conns++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | } |
| 189 | |
| 190 | |
Simon Horman | 4a516f1 | 2011-09-16 14:11:49 +0900 | [diff] [blame] | 191 | static inline void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | ip_vs_set_state(struct ip_vs_conn *cp, int direction, |
| 193 | const struct sk_buff *skb, |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 194 | struct ip_vs_proto_data *pd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | { |
Simon Horman | 4a516f1 | 2011-09-16 14:11:49 +0900 | [diff] [blame] | 196 | if (likely(pd->pp->state_transition)) |
| 197 | pd->pp->state_transition(cp, direction, skb, pd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | } |
| 199 | |
Hans Schillstrom | a5959d5 | 2010-11-19 14:25:10 +0100 | [diff] [blame] | 200 | static inline int |
Simon Horman | 8599928 | 2010-08-22 21:37:53 +0900 | [diff] [blame] | 201 | ip_vs_conn_fill_param_persist(const struct ip_vs_service *svc, |
| 202 | struct sk_buff *skb, int protocol, |
| 203 | const union nf_inet_addr *caddr, __be16 cport, |
| 204 | const union nf_inet_addr *vaddr, __be16 vport, |
| 205 | struct ip_vs_conn_param *p) |
| 206 | { |
Hans Schillstrom | 6e67e58 | 2011-01-03 14:44:57 +0100 | [diff] [blame] | 207 | ip_vs_conn_fill_param(svc->net, svc->af, protocol, caddr, cport, vaddr, |
| 208 | vport, p); |
Simon Horman | 8599928 | 2010-08-22 21:37:53 +0900 | [diff] [blame] | 209 | p->pe = svc->pe; |
| 210 | if (p->pe && p->pe->fill_param) |
Hans Schillstrom | a5959d5 | 2010-11-19 14:25:10 +0100 | [diff] [blame] | 211 | return p->pe->fill_param(p, skb); |
| 212 | |
| 213 | return 0; |
Simon Horman | 8599928 | 2010-08-22 21:37:53 +0900 | [diff] [blame] | 214 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | /* |
| 217 | * IPVS persistent scheduling function |
| 218 | * It creates a connection entry according to its template if exists, |
| 219 | * or selects a server and creates a connection entry plus a template. |
| 220 | * Locking: we are svc user (svc->refcnt), so we hold all dests too |
| 221 | * Protocols supported: TCP, UDP |
| 222 | */ |
| 223 | static struct ip_vs_conn * |
| 224 | ip_vs_sched_persist(struct ip_vs_service *svc, |
Simon Horman | 8599928 | 2010-08-22 21:37:53 +0900 | [diff] [blame] | 225 | struct sk_buff *skb, |
Hans Schillstrom | a5959d5 | 2010-11-19 14:25:10 +0100 | [diff] [blame] | 226 | __be16 src_port, __be16 dst_port, int *ignored) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | { |
| 228 | struct ip_vs_conn *cp = NULL; |
Julius Volz | 28364a5 | 2008-09-02 15:55:43 +0200 | [diff] [blame] | 229 | struct ip_vs_iphdr iph; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | struct ip_vs_dest *dest; |
| 231 | struct ip_vs_conn *ct; |
Simon Horman | 5b57a98 | 2010-08-22 21:37:51 +0900 | [diff] [blame] | 232 | __be16 dport = 0; /* destination port to forward */ |
Julian Anastasov | 3575792 | 2010-09-17 14:18:16 +0200 | [diff] [blame] | 233 | unsigned int flags; |
Simon Horman | f11017e | 2010-08-22 21:37:52 +0900 | [diff] [blame] | 234 | struct ip_vs_conn_param param; |
Simon Horman | e0aac52 | 2012-01-27 10:45:27 +0900 | [diff] [blame] | 235 | const union nf_inet_addr fwmark = { .ip = htonl(svc->fwmark) }; |
Julius Volz | 28364a5 | 2008-09-02 15:55:43 +0200 | [diff] [blame] | 236 | union nf_inet_addr snet; /* source network of the client, |
| 237 | after masking */ |
Julius Volz | cd17f9e | 2008-09-02 15:55:46 +0200 | [diff] [blame] | 238 | |
| 239 | ip_vs_fill_iphdr(svc->af, skb_network_header(skb), &iph); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | |
| 241 | /* Mask saddr with the netmask to adjust template granularity */ |
Julius Volz | cd17f9e | 2008-09-02 15:55:46 +0200 | [diff] [blame] | 242 | #ifdef CONFIG_IP_VS_IPV6 |
| 243 | if (svc->af == AF_INET6) |
| 244 | ipv6_addr_prefix(&snet.in6, &iph.saddr.in6, svc->netmask); |
| 245 | else |
| 246 | #endif |
| 247 | snet.ip = iph.saddr.ip & svc->netmask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | |
Julius Volz | cd17f9e | 2008-09-02 15:55:46 +0200 | [diff] [blame] | 249 | IP_VS_DBG_BUF(6, "p-schedule: src %s:%u dest %s:%u " |
| 250 | "mnet %s\n", |
Hans Schillstrom | ce144f2 | 2010-11-19 14:25:08 +0100 | [diff] [blame] | 251 | IP_VS_DBG_ADDR(svc->af, &iph.saddr), ntohs(src_port), |
| 252 | IP_VS_DBG_ADDR(svc->af, &iph.daddr), ntohs(dst_port), |
Julius Volz | cd17f9e | 2008-09-02 15:55:46 +0200 | [diff] [blame] | 253 | IP_VS_DBG_ADDR(svc->af, &snet)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | |
| 255 | /* |
| 256 | * As far as we know, FTP is a very complicated network protocol, and |
| 257 | * it uses control connection and data connections. For active FTP, |
| 258 | * FTP server initialize data connection to the client, its source port |
| 259 | * is often 20. For passive FTP, FTP server tells the clients the port |
| 260 | * that it passively listens to, and the client issues the data |
| 261 | * connection. In the tunneling or direct routing mode, the load |
| 262 | * balancer is on the client-to-server half of connection, the port |
| 263 | * number is unknown to the load balancer. So, a conn template like |
| 264 | * <caddr, 0, vaddr, 0, daddr, 0> is created for persistent FTP |
| 265 | * service, and a template like <caddr, 0, vaddr, vport, daddr, dport> |
| 266 | * is created for other persistent services. |
| 267 | */ |
Simon Horman | 5b57a98 | 2010-08-22 21:37:51 +0900 | [diff] [blame] | 268 | { |
Simon Horman | f11017e | 2010-08-22 21:37:52 +0900 | [diff] [blame] | 269 | int protocol = iph.protocol; |
| 270 | const union nf_inet_addr *vaddr = &iph.daddr; |
Simon Horman | f11017e | 2010-08-22 21:37:52 +0900 | [diff] [blame] | 271 | __be16 vport = 0; |
| 272 | |
Hans Schillstrom | ce144f2 | 2010-11-19 14:25:08 +0100 | [diff] [blame] | 273 | if (dst_port == svc->port) { |
Simon Horman | 5b57a98 | 2010-08-22 21:37:51 +0900 | [diff] [blame] | 274 | /* non-FTP template: |
| 275 | * <protocol, caddr, 0, vaddr, vport, daddr, dport> |
| 276 | * FTP template: |
| 277 | * <protocol, caddr, 0, vaddr, 0, daddr, 0> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | */ |
| 279 | if (svc->port != FTPPORT) |
Hans Schillstrom | ce144f2 | 2010-11-19 14:25:08 +0100 | [diff] [blame] | 280 | vport = dst_port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | } else { |
Simon Horman | 5b57a98 | 2010-08-22 21:37:51 +0900 | [diff] [blame] | 282 | /* Note: persistent fwmark-based services and |
| 283 | * persistent port zero service are handled here. |
| 284 | * fwmark template: |
| 285 | * <IPPROTO_IP,caddr,0,fwmark,0,daddr,0> |
| 286 | * port zero template: |
| 287 | * <protocol,caddr,0,vaddr,0,daddr,0> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | */ |
Julius Volz | 28364a5 | 2008-09-02 15:55:43 +0200 | [diff] [blame] | 289 | if (svc->fwmark) { |
Simon Horman | 5b57a98 | 2010-08-22 21:37:51 +0900 | [diff] [blame] | 290 | protocol = IPPROTO_IP; |
| 291 | vaddr = &fwmark; |
| 292 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | } |
Hans Schillstrom | a5959d5 | 2010-11-19 14:25:10 +0100 | [diff] [blame] | 294 | /* return *ignored = -1 so NF_DROP can be used */ |
| 295 | if (ip_vs_conn_fill_param_persist(svc, skb, protocol, &snet, 0, |
| 296 | vaddr, vport, ¶m) < 0) { |
| 297 | *ignored = -1; |
| 298 | return NULL; |
| 299 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | } |
| 301 | |
Simon Horman | 5b57a98 | 2010-08-22 21:37:51 +0900 | [diff] [blame] | 302 | /* Check if a template already exists */ |
Simon Horman | f11017e | 2010-08-22 21:37:52 +0900 | [diff] [blame] | 303 | ct = ip_vs_ct_in_get(¶m); |
Simon Horman | 5b57a98 | 2010-08-22 21:37:51 +0900 | [diff] [blame] | 304 | if (!ct || !ip_vs_check_template(ct)) { |
Hans Schillstrom | a5959d5 | 2010-11-19 14:25:10 +0100 | [diff] [blame] | 305 | /* |
| 306 | * No template found or the dest of the connection |
Simon Horman | 5b57a98 | 2010-08-22 21:37:51 +0900 | [diff] [blame] | 307 | * template is not available. |
Hans Schillstrom | a5959d5 | 2010-11-19 14:25:10 +0100 | [diff] [blame] | 308 | * return *ignored=0 i.e. ICMP and NF_DROP |
Simon Horman | 5b57a98 | 2010-08-22 21:37:51 +0900 | [diff] [blame] | 309 | */ |
| 310 | dest = svc->scheduler->schedule(svc, skb); |
| 311 | if (!dest) { |
| 312 | IP_VS_DBG(1, "p-schedule: no dest found.\n"); |
Simon Horman | 8599928 | 2010-08-22 21:37:53 +0900 | [diff] [blame] | 313 | kfree(param.pe_data); |
Hans Schillstrom | a5959d5 | 2010-11-19 14:25:10 +0100 | [diff] [blame] | 314 | *ignored = 0; |
Simon Horman | 5b57a98 | 2010-08-22 21:37:51 +0900 | [diff] [blame] | 315 | return NULL; |
| 316 | } |
| 317 | |
Hans Schillstrom | ce144f2 | 2010-11-19 14:25:08 +0100 | [diff] [blame] | 318 | if (dst_port == svc->port && svc->port != FTPPORT) |
Simon Horman | 5b57a98 | 2010-08-22 21:37:51 +0900 | [diff] [blame] | 319 | dport = dest->port; |
| 320 | |
Simon Horman | 8599928 | 2010-08-22 21:37:53 +0900 | [diff] [blame] | 321 | /* Create a template |
| 322 | * This adds param.pe_data to the template, |
| 323 | * and thus param.pe_data will be destroyed |
| 324 | * when the template expires */ |
Simon Horman | f11017e | 2010-08-22 21:37:52 +0900 | [diff] [blame] | 325 | ct = ip_vs_conn_new(¶m, &dest->addr, dport, |
Hans Schillstrom | 0e051e6 | 2010-11-19 14:25:07 +0100 | [diff] [blame] | 326 | IP_VS_CONN_F_TEMPLATE, dest, skb->mark); |
Simon Horman | 8599928 | 2010-08-22 21:37:53 +0900 | [diff] [blame] | 327 | if (ct == NULL) { |
| 328 | kfree(param.pe_data); |
Hans Schillstrom | a5959d5 | 2010-11-19 14:25:10 +0100 | [diff] [blame] | 329 | *ignored = -1; |
Simon Horman | 5b57a98 | 2010-08-22 21:37:51 +0900 | [diff] [blame] | 330 | return NULL; |
Simon Horman | 8599928 | 2010-08-22 21:37:53 +0900 | [diff] [blame] | 331 | } |
Simon Horman | 5b57a98 | 2010-08-22 21:37:51 +0900 | [diff] [blame] | 332 | |
| 333 | ct->timeout = svc->timeout; |
Simon Horman | 8599928 | 2010-08-22 21:37:53 +0900 | [diff] [blame] | 334 | } else { |
Simon Horman | 5b57a98 | 2010-08-22 21:37:51 +0900 | [diff] [blame] | 335 | /* set destination with the found template */ |
| 336 | dest = ct->dest; |
Simon Horman | 8599928 | 2010-08-22 21:37:53 +0900 | [diff] [blame] | 337 | kfree(param.pe_data); |
| 338 | } |
Simon Horman | 5b57a98 | 2010-08-22 21:37:51 +0900 | [diff] [blame] | 339 | |
Hans Schillstrom | ce144f2 | 2010-11-19 14:25:08 +0100 | [diff] [blame] | 340 | dport = dst_port; |
Simon Horman | 5b57a98 | 2010-08-22 21:37:51 +0900 | [diff] [blame] | 341 | if (dport == svc->port && dest->port) |
| 342 | dport = dest->port; |
| 343 | |
Nick Chalk | 26ec037 | 2010-06-22 08:07:01 +0200 | [diff] [blame] | 344 | flags = (svc->flags & IP_VS_SVC_F_ONEPACKET |
| 345 | && iph.protocol == IPPROTO_UDP)? |
| 346 | IP_VS_CONN_F_ONE_PACKET : 0; |
| 347 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | /* |
| 349 | * Create a new connection according to the template |
| 350 | */ |
Hans Schillstrom | 6e67e58 | 2011-01-03 14:44:57 +0100 | [diff] [blame] | 351 | ip_vs_conn_fill_param(svc->net, svc->af, iph.protocol, &iph.saddr, |
| 352 | src_port, &iph.daddr, dst_port, ¶m); |
Hans Schillstrom | ce144f2 | 2010-11-19 14:25:08 +0100 | [diff] [blame] | 353 | |
Hans Schillstrom | 0e051e6 | 2010-11-19 14:25:07 +0100 | [diff] [blame] | 354 | cp = ip_vs_conn_new(¶m, &dest->addr, dport, flags, dest, skb->mark); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | if (cp == NULL) { |
| 356 | ip_vs_conn_put(ct); |
Hans Schillstrom | a5959d5 | 2010-11-19 14:25:10 +0100 | [diff] [blame] | 357 | *ignored = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | return NULL; |
| 359 | } |
| 360 | |
| 361 | /* |
| 362 | * Add its control |
| 363 | */ |
| 364 | ip_vs_control_add(cp, ct); |
| 365 | ip_vs_conn_put(ct); |
| 366 | |
| 367 | ip_vs_conn_stats(cp, svc); |
| 368 | return cp; |
| 369 | } |
| 370 | |
| 371 | |
| 372 | /* |
| 373 | * IPVS main scheduling function |
| 374 | * It selects a server according to the virtual service, and |
| 375 | * creates a connection entry. |
| 376 | * Protocols supported: TCP, UDP |
Hans Schillstrom | a5959d5 | 2010-11-19 14:25:10 +0100 | [diff] [blame] | 377 | * |
| 378 | * Usage of *ignored |
| 379 | * |
| 380 | * 1 : protocol tried to schedule (eg. on SYN), found svc but the |
| 381 | * svc/scheduler decides that this packet should be accepted with |
| 382 | * NF_ACCEPT because it must not be scheduled. |
| 383 | * |
| 384 | * 0 : scheduler can not find destination, so try bypass or |
| 385 | * return ICMP and then NF_DROP (ip_vs_leave). |
| 386 | * |
| 387 | * -1 : scheduler tried to schedule but fatal error occurred, eg. |
| 388 | * ip_vs_conn_new failure (ENOMEM) or ip_vs_sip_fill_param |
| 389 | * failure such as missing Call-ID, ENOMEM on skb_linearize |
| 390 | * or pe_data. In this case we should return NF_DROP without |
| 391 | * any attempts to send ICMP with ip_vs_leave. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | */ |
| 393 | struct ip_vs_conn * |
Julian Anastasov | 190ecd2 | 2010-10-17 16:24:37 +0300 | [diff] [blame] | 394 | ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb, |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 395 | struct ip_vs_proto_data *pd, int *ignored) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | { |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 397 | struct ip_vs_protocol *pp = pd->pp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | struct ip_vs_conn *cp = NULL; |
Julius Volz | 28364a5 | 2008-09-02 15:55:43 +0200 | [diff] [blame] | 399 | struct ip_vs_iphdr iph; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | struct ip_vs_dest *dest; |
Julian Anastasov | 3575792 | 2010-09-17 14:18:16 +0200 | [diff] [blame] | 401 | __be16 _ports[2], *pptr; |
| 402 | unsigned int flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | |
Julian Anastasov | 190ecd2 | 2010-10-17 16:24:37 +0300 | [diff] [blame] | 404 | *ignored = 1; |
Julius Volz | 28364a5 | 2008-09-02 15:55:43 +0200 | [diff] [blame] | 405 | ip_vs_fill_iphdr(svc->af, skb_network_header(skb), &iph); |
| 406 | pptr = skb_header_pointer(skb, iph.len, sizeof(_ports), _ports); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | if (pptr == NULL) |
| 408 | return NULL; |
| 409 | |
| 410 | /* |
Julian Anastasov | 190ecd2 | 2010-10-17 16:24:37 +0300 | [diff] [blame] | 411 | * FTPDATA needs this check when using local real server. |
| 412 | * Never schedule Active FTPDATA connections from real server. |
| 413 | * For LVS-NAT they must be already created. For other methods |
| 414 | * with persistence the connection is created on SYN+ACK. |
| 415 | */ |
| 416 | if (pptr[0] == FTPDATA) { |
Julian Anastasov | 0d79641 | 2010-10-17 16:46:17 +0300 | [diff] [blame] | 417 | IP_VS_DBG_PKT(12, svc->af, pp, skb, 0, |
| 418 | "Not scheduling FTPDATA"); |
Julian Anastasov | 190ecd2 | 2010-10-17 16:24:37 +0300 | [diff] [blame] | 419 | return NULL; |
| 420 | } |
| 421 | |
| 422 | /* |
Hans Schillstrom | a5959d5 | 2010-11-19 14:25:10 +0100 | [diff] [blame] | 423 | * Do not schedule replies from local real server. |
Julian Anastasov | 190ecd2 | 2010-10-17 16:24:37 +0300 | [diff] [blame] | 424 | */ |
| 425 | if ((!skb->dev || skb->dev->flags & IFF_LOOPBACK) && |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 426 | (cp = pp->conn_in_get(svc->af, skb, &iph, iph.len, 1))) { |
Julian Anastasov | 0d79641 | 2010-10-17 16:46:17 +0300 | [diff] [blame] | 427 | IP_VS_DBG_PKT(12, svc->af, pp, skb, 0, |
Julian Anastasov | 190ecd2 | 2010-10-17 16:24:37 +0300 | [diff] [blame] | 428 | "Not scheduling reply for existing connection"); |
| 429 | __ip_vs_conn_put(cp); |
| 430 | return NULL; |
| 431 | } |
| 432 | |
| 433 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | * Persistent service |
| 435 | */ |
Hans Schillstrom | a5959d5 | 2010-11-19 14:25:10 +0100 | [diff] [blame] | 436 | if (svc->flags & IP_VS_SVC_F_PERSISTENT) |
| 437 | return ip_vs_sched_persist(svc, skb, pptr[0], pptr[1], ignored); |
| 438 | |
| 439 | *ignored = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | |
| 441 | /* |
| 442 | * Non-persistent service |
| 443 | */ |
| 444 | if (!svc->fwmark && pptr[1] != svc->port) { |
| 445 | if (!svc->port) |
Hannes Eder | 1e3e238 | 2009-08-02 11:05:41 +0000 | [diff] [blame] | 446 | pr_err("Schedule: port zero only supported " |
| 447 | "in persistent services, " |
| 448 | "check your ipvs configuration\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | return NULL; |
| 450 | } |
| 451 | |
| 452 | dest = svc->scheduler->schedule(svc, skb); |
| 453 | if (dest == NULL) { |
| 454 | IP_VS_DBG(1, "Schedule: no dest found.\n"); |
| 455 | return NULL; |
| 456 | } |
| 457 | |
Nick Chalk | 26ec037 | 2010-06-22 08:07:01 +0200 | [diff] [blame] | 458 | flags = (svc->flags & IP_VS_SVC_F_ONEPACKET |
| 459 | && iph.protocol == IPPROTO_UDP)? |
| 460 | IP_VS_CONN_F_ONE_PACKET : 0; |
| 461 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | /* |
| 463 | * Create a connection entry. |
| 464 | */ |
Simon Horman | f11017e | 2010-08-22 21:37:52 +0900 | [diff] [blame] | 465 | { |
| 466 | struct ip_vs_conn_param p; |
Hans Schillstrom | 6e67e58 | 2011-01-03 14:44:57 +0100 | [diff] [blame] | 467 | |
| 468 | ip_vs_conn_fill_param(svc->net, svc->af, iph.protocol, |
| 469 | &iph.saddr, pptr[0], &iph.daddr, pptr[1], |
| 470 | &p); |
Simon Horman | f11017e | 2010-08-22 21:37:52 +0900 | [diff] [blame] | 471 | cp = ip_vs_conn_new(&p, &dest->addr, |
| 472 | dest->port ? dest->port : pptr[1], |
Hans Schillstrom | 0e051e6 | 2010-11-19 14:25:07 +0100 | [diff] [blame] | 473 | flags, dest, skb->mark); |
Hans Schillstrom | a5959d5 | 2010-11-19 14:25:10 +0100 | [diff] [blame] | 474 | if (!cp) { |
| 475 | *ignored = -1; |
Simon Horman | f11017e | 2010-08-22 21:37:52 +0900 | [diff] [blame] | 476 | return NULL; |
Hans Schillstrom | a5959d5 | 2010-11-19 14:25:10 +0100 | [diff] [blame] | 477 | } |
Simon Horman | f11017e | 2010-08-22 21:37:52 +0900 | [diff] [blame] | 478 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | |
Julius Volz | cd17f9e | 2008-09-02 15:55:46 +0200 | [diff] [blame] | 480 | IP_VS_DBG_BUF(6, "Schedule fwd:%c c:%s:%u v:%s:%u " |
| 481 | "d:%s:%u conn->flags:%X conn->refcnt:%d\n", |
| 482 | ip_vs_fwd_tag(cp), |
| 483 | IP_VS_DBG_ADDR(svc->af, &cp->caddr), ntohs(cp->cport), |
| 484 | IP_VS_DBG_ADDR(svc->af, &cp->vaddr), ntohs(cp->vport), |
| 485 | IP_VS_DBG_ADDR(svc->af, &cp->daddr), ntohs(cp->dport), |
| 486 | cp->flags, atomic_read(&cp->refcnt)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | |
| 488 | ip_vs_conn_stats(cp, svc); |
| 489 | return cp; |
| 490 | } |
| 491 | |
| 492 | |
| 493 | /* |
| 494 | * Pass or drop the packet. |
| 495 | * Called by ip_vs_in, when the virtual service is available but |
| 496 | * no destination is available for a new connection. |
| 497 | */ |
| 498 | int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb, |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 499 | struct ip_vs_proto_data *pd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | { |
Al Viro | 014d730 | 2006-09-28 14:29:52 -0700 | [diff] [blame] | 501 | __be16 _ports[2], *pptr; |
Julius Volz | 28364a5 | 2008-09-02 15:55:43 +0200 | [diff] [blame] | 502 | struct ip_vs_iphdr iph; |
Simon Horman | a7a86b8 | 2011-02-04 18:33:02 +0900 | [diff] [blame] | 503 | #ifdef CONFIG_SYSCTL |
| 504 | struct net *net; |
| 505 | struct netns_ipvs *ipvs; |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 506 | int unicast; |
Simon Horman | a7a86b8 | 2011-02-04 18:33:02 +0900 | [diff] [blame] | 507 | #endif |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 508 | |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 509 | ip_vs_fill_iphdr(svc->af, skb_network_header(skb), &iph); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | |
Julius Volz | 28364a5 | 2008-09-02 15:55:43 +0200 | [diff] [blame] | 511 | pptr = skb_header_pointer(skb, iph.len, sizeof(_ports), _ports); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | if (pptr == NULL) { |
| 513 | ip_vs_service_put(svc); |
| 514 | return NF_DROP; |
| 515 | } |
Simon Horman | a7a86b8 | 2011-02-04 18:33:02 +0900 | [diff] [blame] | 516 | |
| 517 | #ifdef CONFIG_SYSCTL |
Hans Schillstrom | 4a98480 | 2011-01-03 14:45:02 +0100 | [diff] [blame] | 518 | net = skb_net(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 520 | #ifdef CONFIG_IP_VS_IPV6 |
| 521 | if (svc->af == AF_INET6) |
| 522 | unicast = ipv6_addr_type(&iph.daddr.in6) & IPV6_ADDR_UNICAST; |
| 523 | else |
| 524 | #endif |
Hans Schillstrom | 4a98480 | 2011-01-03 14:45:02 +0100 | [diff] [blame] | 525 | unicast = (inet_addr_type(net, iph.daddr.ip) == RTN_UNICAST); |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 526 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | /* if it is fwmark-based service, the cache_bypass sysctl is up |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 528 | and the destination is a non-local unicast, then create |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | a cache_bypass connection entry */ |
Hans Schillstrom | 4a98480 | 2011-01-03 14:45:02 +0100 | [diff] [blame] | 530 | ipvs = net_ipvs(net); |
Hans Schillstrom | a0840e2 | 2011-01-03 14:44:58 +0100 | [diff] [blame] | 531 | if (ipvs->sysctl_cache_bypass && svc->fwmark && unicast) { |
Krzysztof Wilczynski | ad542ced | 2011-10-18 20:59:49 +0100 | [diff] [blame] | 532 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | struct ip_vs_conn *cp; |
Julian Anastasov | 3575792 | 2010-09-17 14:18:16 +0200 | [diff] [blame] | 534 | unsigned int flags = (svc->flags & IP_VS_SVC_F_ONEPACKET && |
| 535 | iph.protocol == IPPROTO_UDP)? |
| 536 | IP_VS_CONN_F_ONE_PACKET : 0; |
Simon Horman | dff630d | 2008-09-17 10:10:42 +1000 | [diff] [blame] | 537 | union nf_inet_addr daddr = { .all = { 0, 0, 0, 0 } }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | |
| 539 | ip_vs_service_put(svc); |
| 540 | |
| 541 | /* create a new connection entry */ |
Hannes Eder | 1e3e238 | 2009-08-02 11:05:41 +0000 | [diff] [blame] | 542 | IP_VS_DBG(6, "%s(): create a cache_bypass entry\n", __func__); |
Simon Horman | f11017e | 2010-08-22 21:37:52 +0900 | [diff] [blame] | 543 | { |
| 544 | struct ip_vs_conn_param p; |
Hans Schillstrom | 6e67e58 | 2011-01-03 14:44:57 +0100 | [diff] [blame] | 545 | ip_vs_conn_fill_param(svc->net, svc->af, iph.protocol, |
Simon Horman | f11017e | 2010-08-22 21:37:52 +0900 | [diff] [blame] | 546 | &iph.saddr, pptr[0], |
| 547 | &iph.daddr, pptr[1], &p); |
| 548 | cp = ip_vs_conn_new(&p, &daddr, 0, |
| 549 | IP_VS_CONN_F_BYPASS | flags, |
Hans Schillstrom | 0e051e6 | 2010-11-19 14:25:07 +0100 | [diff] [blame] | 550 | NULL, skb->mark); |
Simon Horman | f11017e | 2010-08-22 21:37:52 +0900 | [diff] [blame] | 551 | if (!cp) |
| 552 | return NF_DROP; |
| 553 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | |
| 555 | /* statistics */ |
| 556 | ip_vs_in_stats(cp, skb); |
| 557 | |
| 558 | /* set state */ |
Simon Horman | 4a516f1 | 2011-09-16 14:11:49 +0900 | [diff] [blame] | 559 | ip_vs_set_state(cp, IP_VS_DIR_INPUT, skb, pd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | |
| 561 | /* transmit the first SYN packet */ |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 562 | ret = cp->packet_xmit(skb, cp, pd->pp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | /* do not touch skb anymore */ |
| 564 | |
| 565 | atomic_inc(&cp->in_pkts); |
| 566 | ip_vs_conn_put(cp); |
| 567 | return ret; |
| 568 | } |
Simon Horman | a7a86b8 | 2011-02-04 18:33:02 +0900 | [diff] [blame] | 569 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | |
| 571 | /* |
| 572 | * When the virtual ftp service is presented, packets destined |
| 573 | * for other services on the VIP may get here (except services |
| 574 | * listed in the ipvs table), pass the packets, because it is |
| 575 | * not ipvs job to decide to drop the packets. |
| 576 | */ |
| 577 | if ((svc->port == FTPPORT) && (pptr[1] != FTPPORT)) { |
| 578 | ip_vs_service_put(svc); |
| 579 | return NF_ACCEPT; |
| 580 | } |
| 581 | |
| 582 | ip_vs_service_put(svc); |
| 583 | |
| 584 | /* |
| 585 | * Notify the client that the destination is unreachable, and |
| 586 | * release the socket buffer. |
| 587 | * Since it is in IP layer, the TCP socket is not actually |
| 588 | * created, the TCP RST packet cannot be sent, instead that |
| 589 | * ICMP_PORT_UNREACH is sent here no matter it is TCP/UDP. --WZ |
| 590 | */ |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 591 | #ifdef CONFIG_IP_VS_IPV6 |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 592 | if (svc->af == AF_INET6) { |
| 593 | if (!skb->dev) { |
| 594 | struct net *net = dev_net(skb_dst(skb)->dev); |
| 595 | |
| 596 | skb->dev = net->loopback_dev; |
| 597 | } |
Alexey Dobriyan | 3ffe533 | 2010-02-18 08:25:24 +0000 | [diff] [blame] | 598 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 599 | } else |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 600 | #endif |
| 601 | icmp_send(skb, ICMP_DEST_UNREACH, ICMP_PORT_UNREACH, 0); |
| 602 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | return NF_DROP; |
| 604 | } |
| 605 | |
Simon Horman | 84b3cee | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 606 | #ifdef CONFIG_SYSCTL |
| 607 | |
| 608 | static int sysctl_snat_reroute(struct sk_buff *skb) |
| 609 | { |
| 610 | struct netns_ipvs *ipvs = net_ipvs(skb_net(skb)); |
| 611 | return ipvs->sysctl_snat_reroute; |
| 612 | } |
| 613 | |
Simon Horman | 0cfa558 | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 614 | static int sysctl_nat_icmp_send(struct net *net) |
| 615 | { |
| 616 | struct netns_ipvs *ipvs = net_ipvs(net); |
| 617 | return ipvs->sysctl_nat_icmp_send; |
| 618 | } |
| 619 | |
Simon Horman | 71a8ab6 | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 620 | static int sysctl_expire_nodest_conn(struct netns_ipvs *ipvs) |
| 621 | { |
| 622 | return ipvs->sysctl_expire_nodest_conn; |
| 623 | } |
| 624 | |
Simon Horman | 84b3cee | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 625 | #else |
| 626 | |
| 627 | static int sysctl_snat_reroute(struct sk_buff *skb) { return 0; } |
Simon Horman | 0cfa558 | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 628 | static int sysctl_nat_icmp_send(struct net *net) { return 0; } |
Simon Horman | 71a8ab6 | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 629 | static int sysctl_expire_nodest_conn(struct netns_ipvs *ipvs) { return 0; } |
Simon Horman | 84b3cee | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 630 | |
| 631 | #endif |
| 632 | |
Al Viro | b1550f2 | 2006-11-14 21:37:50 -0800 | [diff] [blame] | 633 | __sum16 ip_vs_checksum_complete(struct sk_buff *skb, int offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | { |
Al Viro | d3bc23e | 2006-11-14 21:24:49 -0800 | [diff] [blame] | 635 | return csum_fold(skb_checksum(skb, offset, skb->len - offset, 0)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | } |
| 637 | |
Julian Anastasov | 1ca5bb5 | 2010-10-17 16:32:29 +0300 | [diff] [blame] | 638 | static inline enum ip_defrag_users ip_vs_defrag_user(unsigned int hooknum) |
| 639 | { |
| 640 | if (NF_INET_LOCAL_IN == hooknum) |
| 641 | return IP_DEFRAG_VS_IN; |
| 642 | if (NF_INET_FORWARD == hooknum) |
| 643 | return IP_DEFRAG_VS_FWD; |
| 644 | return IP_DEFRAG_VS_OUT; |
| 645 | } |
| 646 | |
Herbert Xu | 776c729 | 2007-10-14 00:38:32 -0700 | [diff] [blame] | 647 | static inline int ip_vs_gather_frags(struct sk_buff *skb, u_int32_t user) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | { |
Herbert Xu | 776c729 | 2007-10-14 00:38:32 -0700 | [diff] [blame] | 649 | int err = ip_defrag(skb, user); |
| 650 | |
| 651 | if (!err) |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 652 | ip_send_check(ip_hdr(skb)); |
Herbert Xu | 776c729 | 2007-10-14 00:38:32 -0700 | [diff] [blame] | 653 | |
| 654 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | } |
| 656 | |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 657 | #ifdef CONFIG_IP_VS_IPV6 |
| 658 | static inline int ip_vs_gather_frags_v6(struct sk_buff *skb, u_int32_t user) |
| 659 | { |
| 660 | /* TODO IPv6: Find out what to do here for IPv6 */ |
| 661 | return 0; |
| 662 | } |
| 663 | #endif |
| 664 | |
Simon Horman | ba4fd7e | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 665 | static int ip_vs_route_me_harder(int af, struct sk_buff *skb) |
| 666 | { |
Simon Horman | ba4fd7e | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 667 | #ifdef CONFIG_IP_VS_IPV6 |
| 668 | if (af == AF_INET6) { |
Simon Horman | 84b3cee | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 669 | if (sysctl_snat_reroute(skb) && ip6_route_me_harder(skb) != 0) |
Simon Horman | ba4fd7e | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 670 | return 1; |
| 671 | } else |
| 672 | #endif |
Simon Horman | 84b3cee | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 673 | if ((sysctl_snat_reroute(skb) || |
Simon Horman | ba4fd7e | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 674 | skb_rtable(skb)->rt_flags & RTCF_LOCAL) && |
| 675 | ip_route_me_harder(skb, RTN_LOCAL) != 0) |
| 676 | return 1; |
| 677 | |
| 678 | return 0; |
| 679 | } |
| 680 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | /* |
| 682 | * Packet has been made sufficiently writable in caller |
| 683 | * - inout: 1=in->out, 0=out->in |
| 684 | */ |
| 685 | void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp, |
| 686 | struct ip_vs_conn *cp, int inout) |
| 687 | { |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 688 | struct iphdr *iph = ip_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | unsigned int icmp_offset = iph->ihl*4; |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 690 | struct icmphdr *icmph = (struct icmphdr *)(skb_network_header(skb) + |
| 691 | icmp_offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | struct iphdr *ciph = (struct iphdr *)(icmph + 1); |
| 693 | |
| 694 | if (inout) { |
Julius Volz | e7ade46 | 2008-09-02 15:55:33 +0200 | [diff] [blame] | 695 | iph->saddr = cp->vaddr.ip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | ip_send_check(iph); |
Julius Volz | e7ade46 | 2008-09-02 15:55:33 +0200 | [diff] [blame] | 697 | ciph->daddr = cp->vaddr.ip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | ip_send_check(ciph); |
| 699 | } else { |
Julius Volz | e7ade46 | 2008-09-02 15:55:33 +0200 | [diff] [blame] | 700 | iph->daddr = cp->daddr.ip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | ip_send_check(iph); |
Julius Volz | e7ade46 | 2008-09-02 15:55:33 +0200 | [diff] [blame] | 702 | ciph->saddr = cp->daddr.ip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | ip_send_check(ciph); |
| 704 | } |
| 705 | |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 706 | /* the TCP/UDP/SCTP port */ |
| 707 | if (IPPROTO_TCP == ciph->protocol || IPPROTO_UDP == ciph->protocol || |
| 708 | IPPROTO_SCTP == ciph->protocol) { |
Al Viro | 014d730 | 2006-09-28 14:29:52 -0700 | [diff] [blame] | 709 | __be16 *ports = (void *)ciph + ciph->ihl*4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | |
| 711 | if (inout) |
| 712 | ports[1] = cp->vport; |
| 713 | else |
| 714 | ports[0] = cp->dport; |
| 715 | } |
| 716 | |
| 717 | /* And finally the ICMP checksum */ |
| 718 | icmph->checksum = 0; |
| 719 | icmph->checksum = ip_vs_checksum_complete(skb, icmp_offset); |
| 720 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 721 | |
| 722 | if (inout) |
Julian Anastasov | 0d79641 | 2010-10-17 16:46:17 +0300 | [diff] [blame] | 723 | IP_VS_DBG_PKT(11, AF_INET, pp, skb, (void *)ciph - (void *)iph, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | "Forwarding altered outgoing ICMP"); |
| 725 | else |
Julian Anastasov | 0d79641 | 2010-10-17 16:46:17 +0300 | [diff] [blame] | 726 | IP_VS_DBG_PKT(11, AF_INET, pp, skb, (void *)ciph - (void *)iph, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | "Forwarding altered incoming ICMP"); |
| 728 | } |
| 729 | |
Julius Volz | b3cdd2a7 | 2008-09-02 15:55:45 +0200 | [diff] [blame] | 730 | #ifdef CONFIG_IP_VS_IPV6 |
| 731 | void ip_vs_nat_icmp_v6(struct sk_buff *skb, struct ip_vs_protocol *pp, |
| 732 | struct ip_vs_conn *cp, int inout) |
| 733 | { |
| 734 | struct ipv6hdr *iph = ipv6_hdr(skb); |
| 735 | unsigned int icmp_offset = sizeof(struct ipv6hdr); |
| 736 | struct icmp6hdr *icmph = (struct icmp6hdr *)(skb_network_header(skb) + |
| 737 | icmp_offset); |
| 738 | struct ipv6hdr *ciph = (struct ipv6hdr *)(icmph + 1); |
| 739 | |
| 740 | if (inout) { |
| 741 | iph->saddr = cp->vaddr.in6; |
| 742 | ciph->daddr = cp->vaddr.in6; |
| 743 | } else { |
| 744 | iph->daddr = cp->daddr.in6; |
| 745 | ciph->saddr = cp->daddr.in6; |
| 746 | } |
| 747 | |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 748 | /* the TCP/UDP/SCTP port */ |
| 749 | if (IPPROTO_TCP == ciph->nexthdr || IPPROTO_UDP == ciph->nexthdr || |
| 750 | IPPROTO_SCTP == ciph->nexthdr) { |
Julius Volz | b3cdd2a7 | 2008-09-02 15:55:45 +0200 | [diff] [blame] | 751 | __be16 *ports = (void *)ciph + sizeof(struct ipv6hdr); |
| 752 | |
| 753 | if (inout) |
| 754 | ports[1] = cp->vport; |
| 755 | else |
| 756 | ports[0] = cp->dport; |
| 757 | } |
| 758 | |
| 759 | /* And finally the ICMP checksum */ |
Simon Horman | 8870f84 | 2010-08-26 13:21:26 -0700 | [diff] [blame] | 760 | icmph->icmp6_cksum = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, |
| 761 | skb->len - icmp_offset, |
| 762 | IPPROTO_ICMPV6, 0); |
| 763 | skb->csum_start = skb_network_header(skb) - skb->head + icmp_offset; |
| 764 | skb->csum_offset = offsetof(struct icmp6hdr, icmp6_cksum); |
| 765 | skb->ip_summed = CHECKSUM_PARTIAL; |
Julius Volz | b3cdd2a7 | 2008-09-02 15:55:45 +0200 | [diff] [blame] | 766 | |
| 767 | if (inout) |
Julian Anastasov | 0d79641 | 2010-10-17 16:46:17 +0300 | [diff] [blame] | 768 | IP_VS_DBG_PKT(11, AF_INET6, pp, skb, |
| 769 | (void *)ciph - (void *)iph, |
| 770 | "Forwarding altered outgoing ICMPv6"); |
Julius Volz | b3cdd2a7 | 2008-09-02 15:55:45 +0200 | [diff] [blame] | 771 | else |
Julian Anastasov | 0d79641 | 2010-10-17 16:46:17 +0300 | [diff] [blame] | 772 | IP_VS_DBG_PKT(11, AF_INET6, pp, skb, |
| 773 | (void *)ciph - (void *)iph, |
| 774 | "Forwarding altered incoming ICMPv6"); |
Julius Volz | b3cdd2a7 | 2008-09-02 15:55:45 +0200 | [diff] [blame] | 775 | } |
| 776 | #endif |
| 777 | |
Malcolm Turnbull | 4856c84 | 2008-09-05 11:17:13 +1000 | [diff] [blame] | 778 | /* Handle relevant response ICMP messages - forward to the right |
Julian Anastasov | 6cb90db | 2011-02-09 02:26:38 +0200 | [diff] [blame] | 779 | * destination host. |
Malcolm Turnbull | 4856c84 | 2008-09-05 11:17:13 +1000 | [diff] [blame] | 780 | */ |
Simon Horman | f2428ed | 2008-09-05 11:17:14 +1000 | [diff] [blame] | 781 | static int handle_response_icmp(int af, struct sk_buff *skb, |
| 782 | union nf_inet_addr *snet, |
| 783 | __u8 protocol, struct ip_vs_conn *cp, |
Malcolm Turnbull | 4856c84 | 2008-09-05 11:17:13 +1000 | [diff] [blame] | 784 | struct ip_vs_protocol *pp, |
| 785 | unsigned int offset, unsigned int ihl) |
| 786 | { |
| 787 | unsigned int verdict = NF_DROP; |
| 788 | |
| 789 | if (IP_VS_FWD_METHOD(cp) != 0) { |
Hannes Eder | 1e3e238 | 2009-08-02 11:05:41 +0000 | [diff] [blame] | 790 | pr_err("shouldn't reach here, because the box is on the " |
| 791 | "half connection in the tun/dr module.\n"); |
Malcolm Turnbull | 4856c84 | 2008-09-05 11:17:13 +1000 | [diff] [blame] | 792 | } |
| 793 | |
| 794 | /* Ensure the checksum is correct */ |
| 795 | if (!skb_csum_unnecessary(skb) && ip_vs_checksum_complete(skb, ihl)) { |
| 796 | /* Failed checksum! */ |
Simon Horman | f2428ed | 2008-09-05 11:17:14 +1000 | [diff] [blame] | 797 | IP_VS_DBG_BUF(1, "Forward ICMP: failed checksum from %s!\n", |
| 798 | IP_VS_DBG_ADDR(af, snet)); |
Malcolm Turnbull | 4856c84 | 2008-09-05 11:17:13 +1000 | [diff] [blame] | 799 | goto out; |
| 800 | } |
| 801 | |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 802 | if (IPPROTO_TCP == protocol || IPPROTO_UDP == protocol || |
| 803 | IPPROTO_SCTP == protocol) |
Malcolm Turnbull | 4856c84 | 2008-09-05 11:17:13 +1000 | [diff] [blame] | 804 | offset += 2 * sizeof(__u16); |
| 805 | if (!skb_make_writable(skb, offset)) |
| 806 | goto out; |
| 807 | |
Simon Horman | f2428ed | 2008-09-05 11:17:14 +1000 | [diff] [blame] | 808 | #ifdef CONFIG_IP_VS_IPV6 |
| 809 | if (af == AF_INET6) |
| 810 | ip_vs_nat_icmp_v6(skb, pp, cp, 1); |
| 811 | else |
| 812 | #endif |
| 813 | ip_vs_nat_icmp(skb, pp, cp, 1); |
Malcolm Turnbull | 4856c84 | 2008-09-05 11:17:13 +1000 | [diff] [blame] | 814 | |
Simon Horman | ba4fd7e | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 815 | if (ip_vs_route_me_harder(af, skb)) |
| 816 | goto out; |
Julian Anastasov | f5a4184 | 2010-10-17 16:35:46 +0300 | [diff] [blame] | 817 | |
Malcolm Turnbull | 4856c84 | 2008-09-05 11:17:13 +1000 | [diff] [blame] | 818 | /* do the statistics and put it back */ |
| 819 | ip_vs_out_stats(cp, skb); |
| 820 | |
Julian Anastasov | cf356d6 | 2010-10-17 16:21:07 +0300 | [diff] [blame] | 821 | skb->ipvs_property = 1; |
Julian Anastasov | f4bc17c | 2010-09-21 17:35:41 +0200 | [diff] [blame] | 822 | if (!(cp->flags & IP_VS_CONN_F_NFCT)) |
Julian Anastasov | cf356d6 | 2010-10-17 16:21:07 +0300 | [diff] [blame] | 823 | ip_vs_notrack(skb); |
Julian Anastasov | f4bc17c | 2010-09-21 17:35:41 +0200 | [diff] [blame] | 824 | else |
| 825 | ip_vs_update_conntrack(skb, cp, 0); |
Malcolm Turnbull | 4856c84 | 2008-09-05 11:17:13 +1000 | [diff] [blame] | 826 | verdict = NF_ACCEPT; |
| 827 | |
| 828 | out: |
| 829 | __ip_vs_conn_put(cp); |
| 830 | |
| 831 | return verdict; |
| 832 | } |
| 833 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | /* |
| 835 | * Handle ICMP messages in the inside-to-outside direction (outgoing). |
Malcolm Turnbull | 4856c84 | 2008-09-05 11:17:13 +1000 | [diff] [blame] | 836 | * Find any that might be relevant, check against existing connections. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | * Currently handles error types - unreachable, quench, ttl exceeded. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | */ |
Julian Anastasov | 1ca5bb5 | 2010-10-17 16:32:29 +0300 | [diff] [blame] | 839 | static int ip_vs_out_icmp(struct sk_buff *skb, int *related, |
| 840 | unsigned int hooknum) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | struct iphdr *iph; |
| 843 | struct icmphdr _icmph, *ic; |
| 844 | struct iphdr _ciph, *cih; /* The ip header contained within the ICMP */ |
Julius Volz | 51ef348 | 2008-09-02 15:55:40 +0200 | [diff] [blame] | 845 | struct ip_vs_iphdr ciph; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | struct ip_vs_conn *cp; |
| 847 | struct ip_vs_protocol *pp; |
Malcolm Turnbull | 4856c84 | 2008-09-05 11:17:13 +1000 | [diff] [blame] | 848 | unsigned int offset, ihl; |
Simon Horman | f2428ed | 2008-09-05 11:17:14 +1000 | [diff] [blame] | 849 | union nf_inet_addr snet; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | |
| 851 | *related = 1; |
| 852 | |
| 853 | /* reassemble IP fragments */ |
Paul Gortmaker | 56f8a75 | 2011-06-21 20:33:34 -0700 | [diff] [blame] | 854 | if (ip_is_fragment(ip_hdr(skb))) { |
Julian Anastasov | 1ca5bb5 | 2010-10-17 16:32:29 +0300 | [diff] [blame] | 855 | if (ip_vs_gather_frags(skb, ip_vs_defrag_user(hooknum))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | return NF_STOLEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | } |
| 858 | |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 859 | iph = ip_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | offset = ihl = iph->ihl * 4; |
| 861 | ic = skb_header_pointer(skb, offset, sizeof(_icmph), &_icmph); |
| 862 | if (ic == NULL) |
| 863 | return NF_DROP; |
| 864 | |
Harvey Harrison | 14d5e83 | 2008-10-31 00:54:29 -0700 | [diff] [blame] | 865 | IP_VS_DBG(12, "Outgoing ICMP (%d,%d) %pI4->%pI4\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | ic->type, ntohs(icmp_id(ic)), |
Harvey Harrison | 14d5e83 | 2008-10-31 00:54:29 -0700 | [diff] [blame] | 867 | &iph->saddr, &iph->daddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | |
| 869 | /* |
| 870 | * Work through seeing if this is for us. |
| 871 | * These checks are supposed to be in an order that means easy |
| 872 | * things are checked first to speed up processing.... however |
| 873 | * this means that some packets will manage to get a long way |
| 874 | * down this stack and then be rejected, but that's life. |
| 875 | */ |
| 876 | if ((ic->type != ICMP_DEST_UNREACH) && |
| 877 | (ic->type != ICMP_SOURCE_QUENCH) && |
| 878 | (ic->type != ICMP_TIME_EXCEEDED)) { |
| 879 | *related = 0; |
| 880 | return NF_ACCEPT; |
| 881 | } |
| 882 | |
| 883 | /* Now find the contained IP header */ |
| 884 | offset += sizeof(_icmph); |
| 885 | cih = skb_header_pointer(skb, offset, sizeof(_ciph), &_ciph); |
| 886 | if (cih == NULL) |
| 887 | return NF_ACCEPT; /* The packet looks wrong, ignore */ |
| 888 | |
| 889 | pp = ip_vs_proto_get(cih->protocol); |
| 890 | if (!pp) |
| 891 | return NF_ACCEPT; |
| 892 | |
| 893 | /* Is the embedded protocol header present? */ |
YOSHIFUJI Hideaki | 4412ec4 | 2007-03-07 14:19:10 +0900 | [diff] [blame] | 894 | if (unlikely(cih->frag_off & htons(IP_OFFSET) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | pp->dont_defrag)) |
| 896 | return NF_ACCEPT; |
| 897 | |
Julian Anastasov | 0d79641 | 2010-10-17 16:46:17 +0300 | [diff] [blame] | 898 | IP_VS_DBG_PKT(11, AF_INET, pp, skb, offset, |
| 899 | "Checking outgoing ICMP for"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | |
| 901 | offset += cih->ihl * 4; |
| 902 | |
Julius Volz | 51ef348 | 2008-09-02 15:55:40 +0200 | [diff] [blame] | 903 | ip_vs_fill_iphdr(AF_INET, cih, &ciph); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | /* The embedded headers contain source and dest in reverse order */ |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 905 | cp = pp->conn_out_get(AF_INET, skb, &ciph, offset, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | if (!cp) |
| 907 | return NF_ACCEPT; |
| 908 | |
Simon Horman | f2428ed | 2008-09-05 11:17:14 +1000 | [diff] [blame] | 909 | snet.ip = iph->saddr; |
| 910 | return handle_response_icmp(AF_INET, skb, &snet, cih->protocol, cp, |
| 911 | pp, offset, ihl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | } |
| 913 | |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 914 | #ifdef CONFIG_IP_VS_IPV6 |
Julian Anastasov | 1ca5bb5 | 2010-10-17 16:32:29 +0300 | [diff] [blame] | 915 | static int ip_vs_out_icmp_v6(struct sk_buff *skb, int *related, |
| 916 | unsigned int hooknum) |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 917 | { |
| 918 | struct ipv6hdr *iph; |
| 919 | struct icmp6hdr _icmph, *ic; |
| 920 | struct ipv6hdr _ciph, *cih; /* The ip header contained |
| 921 | within the ICMP */ |
| 922 | struct ip_vs_iphdr ciph; |
| 923 | struct ip_vs_conn *cp; |
| 924 | struct ip_vs_protocol *pp; |
Simon Horman | f2428ed | 2008-09-05 11:17:14 +1000 | [diff] [blame] | 925 | unsigned int offset; |
| 926 | union nf_inet_addr snet; |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 927 | |
| 928 | *related = 1; |
| 929 | |
| 930 | /* reassemble IP fragments */ |
| 931 | if (ipv6_hdr(skb)->nexthdr == IPPROTO_FRAGMENT) { |
Julian Anastasov | 1ca5bb5 | 2010-10-17 16:32:29 +0300 | [diff] [blame] | 932 | if (ip_vs_gather_frags_v6(skb, ip_vs_defrag_user(hooknum))) |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 933 | return NF_STOLEN; |
| 934 | } |
| 935 | |
| 936 | iph = ipv6_hdr(skb); |
| 937 | offset = sizeof(struct ipv6hdr); |
| 938 | ic = skb_header_pointer(skb, offset, sizeof(_icmph), &_icmph); |
| 939 | if (ic == NULL) |
| 940 | return NF_DROP; |
| 941 | |
Harvey Harrison | 5b095d989 | 2008-10-29 12:52:50 -0700 | [diff] [blame] | 942 | IP_VS_DBG(12, "Outgoing ICMPv6 (%d,%d) %pI6->%pI6\n", |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 943 | ic->icmp6_type, ntohs(icmpv6_id(ic)), |
Harvey Harrison | 38ff4fa | 2008-10-28 16:08:13 -0700 | [diff] [blame] | 944 | &iph->saddr, &iph->daddr); |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 945 | |
| 946 | /* |
| 947 | * Work through seeing if this is for us. |
| 948 | * These checks are supposed to be in an order that means easy |
| 949 | * things are checked first to speed up processing.... however |
| 950 | * this means that some packets will manage to get a long way |
| 951 | * down this stack and then be rejected, but that's life. |
| 952 | */ |
| 953 | if ((ic->icmp6_type != ICMPV6_DEST_UNREACH) && |
| 954 | (ic->icmp6_type != ICMPV6_PKT_TOOBIG) && |
| 955 | (ic->icmp6_type != ICMPV6_TIME_EXCEED)) { |
| 956 | *related = 0; |
| 957 | return NF_ACCEPT; |
| 958 | } |
| 959 | |
| 960 | /* Now find the contained IP header */ |
| 961 | offset += sizeof(_icmph); |
| 962 | cih = skb_header_pointer(skb, offset, sizeof(_ciph), &_ciph); |
| 963 | if (cih == NULL) |
| 964 | return NF_ACCEPT; /* The packet looks wrong, ignore */ |
| 965 | |
| 966 | pp = ip_vs_proto_get(cih->nexthdr); |
| 967 | if (!pp) |
| 968 | return NF_ACCEPT; |
| 969 | |
| 970 | /* Is the embedded protocol header present? */ |
| 971 | /* TODO: we don't support fragmentation at the moment anyways */ |
| 972 | if (unlikely(cih->nexthdr == IPPROTO_FRAGMENT && pp->dont_defrag)) |
| 973 | return NF_ACCEPT; |
| 974 | |
Julian Anastasov | 0d79641 | 2010-10-17 16:46:17 +0300 | [diff] [blame] | 975 | IP_VS_DBG_PKT(11, AF_INET6, pp, skb, offset, |
| 976 | "Checking outgoing ICMPv6 for"); |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 977 | |
| 978 | offset += sizeof(struct ipv6hdr); |
| 979 | |
| 980 | ip_vs_fill_iphdr(AF_INET6, cih, &ciph); |
| 981 | /* The embedded headers contain source and dest in reverse order */ |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 982 | cp = pp->conn_out_get(AF_INET6, skb, &ciph, offset, 1); |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 983 | if (!cp) |
| 984 | return NF_ACCEPT; |
| 985 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 986 | snet.in6 = iph->saddr; |
Simon Horman | f2428ed | 2008-09-05 11:17:14 +1000 | [diff] [blame] | 987 | return handle_response_icmp(AF_INET6, skb, &snet, cih->nexthdr, cp, |
| 988 | pp, offset, sizeof(struct ipv6hdr)); |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 989 | } |
| 990 | #endif |
| 991 | |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 992 | /* |
| 993 | * Check if sctp chunc is ABORT chunk |
| 994 | */ |
| 995 | static inline int is_sctp_abort(const struct sk_buff *skb, int nh_len) |
| 996 | { |
| 997 | sctp_chunkhdr_t *sch, schunk; |
| 998 | sch = skb_header_pointer(skb, nh_len + sizeof(sctp_sctphdr_t), |
| 999 | sizeof(schunk), &schunk); |
| 1000 | if (sch == NULL) |
| 1001 | return 0; |
| 1002 | if (sch->type == SCTP_CID_ABORT) |
| 1003 | return 1; |
| 1004 | return 0; |
| 1005 | } |
| 1006 | |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1007 | static inline int is_tcp_reset(const struct sk_buff *skb, int nh_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | { |
| 1009 | struct tcphdr _tcph, *th; |
| 1010 | |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1011 | th = skb_header_pointer(skb, nh_len, sizeof(_tcph), &_tcph); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | if (th == NULL) |
| 1013 | return 0; |
| 1014 | return th->rst; |
| 1015 | } |
| 1016 | |
Malcolm Turnbull | 4856c84 | 2008-09-05 11:17:13 +1000 | [diff] [blame] | 1017 | /* Handle response packets: rewrite addresses and send away... |
Malcolm Turnbull | 4856c84 | 2008-09-05 11:17:13 +1000 | [diff] [blame] | 1018 | */ |
| 1019 | static unsigned int |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1020 | handle_response(int af, struct sk_buff *skb, struct ip_vs_proto_data *pd, |
Malcolm Turnbull | 4856c84 | 2008-09-05 11:17:13 +1000 | [diff] [blame] | 1021 | struct ip_vs_conn *cp, int ihl) |
| 1022 | { |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1023 | struct ip_vs_protocol *pp = pd->pp; |
| 1024 | |
Julian Anastasov | 0d79641 | 2010-10-17 16:46:17 +0300 | [diff] [blame] | 1025 | IP_VS_DBG_PKT(11, af, pp, skb, 0, "Outgoing packet"); |
Malcolm Turnbull | 4856c84 | 2008-09-05 11:17:13 +1000 | [diff] [blame] | 1026 | |
| 1027 | if (!skb_make_writable(skb, ihl)) |
| 1028 | goto drop; |
| 1029 | |
| 1030 | /* mangle the packet */ |
| 1031 | if (pp->snat_handler && !pp->snat_handler(skb, pp, cp)) |
| 1032 | goto drop; |
| 1033 | |
| 1034 | #ifdef CONFIG_IP_VS_IPV6 |
| 1035 | if (af == AF_INET6) |
| 1036 | ipv6_hdr(skb)->saddr = cp->vaddr.in6; |
| 1037 | else |
| 1038 | #endif |
| 1039 | { |
| 1040 | ip_hdr(skb)->saddr = cp->vaddr.ip; |
| 1041 | ip_send_check(ip_hdr(skb)); |
| 1042 | } |
| 1043 | |
Julian Anastasov | 8a80304 | 2010-09-21 17:38:57 +0200 | [diff] [blame] | 1044 | /* |
| 1045 | * nf_iterate does not expect change in the skb->dst->dev. |
| 1046 | * It looks like it is not fatal to enable this code for hooks |
| 1047 | * where our handlers are at the end of the chain list and |
| 1048 | * when all next handlers use skb->dst->dev and not outdev. |
| 1049 | * It will definitely route properly the inout NAT traffic |
| 1050 | * when multiple paths are used. |
| 1051 | */ |
| 1052 | |
Malcolm Turnbull | 4856c84 | 2008-09-05 11:17:13 +1000 | [diff] [blame] | 1053 | /* For policy routing, packets originating from this |
| 1054 | * machine itself may be routed differently to packets |
| 1055 | * passing through. We want this packet to be routed as |
| 1056 | * if it came from this machine itself. So re-compute |
| 1057 | * the routing information. |
| 1058 | */ |
Simon Horman | ba4fd7e | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 1059 | if (ip_vs_route_me_harder(af, skb)) |
| 1060 | goto drop; |
Malcolm Turnbull | 4856c84 | 2008-09-05 11:17:13 +1000 | [diff] [blame] | 1061 | |
Julian Anastasov | 0d79641 | 2010-10-17 16:46:17 +0300 | [diff] [blame] | 1062 | IP_VS_DBG_PKT(10, af, pp, skb, 0, "After SNAT"); |
Malcolm Turnbull | 4856c84 | 2008-09-05 11:17:13 +1000 | [diff] [blame] | 1063 | |
| 1064 | ip_vs_out_stats(cp, skb); |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1065 | ip_vs_set_state(cp, IP_VS_DIR_OUTPUT, skb, pd); |
Julian Anastasov | cf356d6 | 2010-10-17 16:21:07 +0300 | [diff] [blame] | 1066 | skb->ipvs_property = 1; |
Julian Anastasov | f4bc17c | 2010-09-21 17:35:41 +0200 | [diff] [blame] | 1067 | if (!(cp->flags & IP_VS_CONN_F_NFCT)) |
Julian Anastasov | cf356d6 | 2010-10-17 16:21:07 +0300 | [diff] [blame] | 1068 | ip_vs_notrack(skb); |
Julian Anastasov | f4bc17c | 2010-09-21 17:35:41 +0200 | [diff] [blame] | 1069 | else |
| 1070 | ip_vs_update_conntrack(skb, cp, 0); |
Malcolm Turnbull | 4856c84 | 2008-09-05 11:17:13 +1000 | [diff] [blame] | 1071 | ip_vs_conn_put(cp); |
| 1072 | |
Malcolm Turnbull | 4856c84 | 2008-09-05 11:17:13 +1000 | [diff] [blame] | 1073 | LeaveFunction(11); |
| 1074 | return NF_ACCEPT; |
| 1075 | |
| 1076 | drop: |
| 1077 | ip_vs_conn_put(cp); |
| 1078 | kfree_skb(skb); |
Julian Anastasov | f4bc17c | 2010-09-21 17:35:41 +0200 | [diff] [blame] | 1079 | LeaveFunction(11); |
Malcolm Turnbull | 4856c84 | 2008-09-05 11:17:13 +1000 | [diff] [blame] | 1080 | return NF_STOLEN; |
| 1081 | } |
| 1082 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | /* |
Malcolm Turnbull | 4856c84 | 2008-09-05 11:17:13 +1000 | [diff] [blame] | 1084 | * Check if outgoing packet belongs to the established ip_vs_conn. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | */ |
| 1086 | static unsigned int |
Julian Anastasov | fc60476 | 2010-10-17 16:38:15 +0300 | [diff] [blame] | 1087 | ip_vs_out(unsigned int hooknum, struct sk_buff *skb, int af) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | { |
Hans Schillstrom | fc72325 | 2011-01-03 14:44:43 +0100 | [diff] [blame] | 1089 | struct net *net = NULL; |
Julius Volz | 51ef348 | 2008-09-02 15:55:40 +0200 | [diff] [blame] | 1090 | struct ip_vs_iphdr iph; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | struct ip_vs_protocol *pp; |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1092 | struct ip_vs_proto_data *pd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | struct ip_vs_conn *cp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | |
| 1095 | EnterFunction(11); |
| 1096 | |
Julian Anastasov | fc60476 | 2010-10-17 16:38:15 +0300 | [diff] [blame] | 1097 | /* Already marked as IPVS request or reply? */ |
Harald Welte | 6869c4d | 2005-08-09 19:24:19 -0700 | [diff] [blame] | 1098 | if (skb->ipvs_property) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | return NF_ACCEPT; |
| 1100 | |
Julian Anastasov | fc60476 | 2010-10-17 16:38:15 +0300 | [diff] [blame] | 1101 | /* Bad... Do not break raw sockets */ |
| 1102 | if (unlikely(skb->sk != NULL && hooknum == NF_INET_LOCAL_OUT && |
| 1103 | af == AF_INET)) { |
| 1104 | struct sock *sk = skb->sk; |
| 1105 | struct inet_sock *inet = inet_sk(skb->sk); |
| 1106 | |
| 1107 | if (inet && sk->sk_family == PF_INET && inet->nodefrag) |
| 1108 | return NF_ACCEPT; |
| 1109 | } |
| 1110 | |
| 1111 | if (unlikely(!skb_dst(skb))) |
| 1112 | return NF_ACCEPT; |
| 1113 | |
Hans Schillstrom | fc72325 | 2011-01-03 14:44:43 +0100 | [diff] [blame] | 1114 | net = skb_net(skb); |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1115 | if (!net_ipvs(net)->enable) |
| 1116 | return NF_ACCEPT; |
| 1117 | |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1118 | ip_vs_fill_iphdr(af, skb_network_header(skb), &iph); |
| 1119 | #ifdef CONFIG_IP_VS_IPV6 |
| 1120 | if (af == AF_INET6) { |
| 1121 | if (unlikely(iph.protocol == IPPROTO_ICMPV6)) { |
Julian Anastasov | 1ca5bb5 | 2010-10-17 16:32:29 +0300 | [diff] [blame] | 1122 | int related; |
| 1123 | int verdict = ip_vs_out_icmp_v6(skb, &related, |
| 1124 | hooknum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | |
Julian Anastasov | f5a4184 | 2010-10-17 16:35:46 +0300 | [diff] [blame] | 1126 | if (related) |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1127 | return verdict; |
| 1128 | ip_vs_fill_iphdr(af, skb_network_header(skb), &iph); |
| 1129 | } |
| 1130 | } else |
| 1131 | #endif |
| 1132 | if (unlikely(iph.protocol == IPPROTO_ICMP)) { |
Julian Anastasov | 1ca5bb5 | 2010-10-17 16:32:29 +0300 | [diff] [blame] | 1133 | int related; |
| 1134 | int verdict = ip_vs_out_icmp(skb, &related, hooknum); |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1135 | |
Julian Anastasov | f5a4184 | 2010-10-17 16:35:46 +0300 | [diff] [blame] | 1136 | if (related) |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1137 | return verdict; |
| 1138 | ip_vs_fill_iphdr(af, skb_network_header(skb), &iph); |
| 1139 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1141 | pd = ip_vs_proto_data_get(net, iph.protocol); |
| 1142 | if (unlikely(!pd)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1143 | return NF_ACCEPT; |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1144 | pp = pd->pp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1145 | |
| 1146 | /* reassemble IP fragments */ |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1147 | #ifdef CONFIG_IP_VS_IPV6 |
| 1148 | if (af == AF_INET6) { |
Julian Anastasov | 1ca5bb5 | 2010-10-17 16:32:29 +0300 | [diff] [blame] | 1149 | if (ipv6_hdr(skb)->nexthdr == IPPROTO_FRAGMENT) { |
| 1150 | if (ip_vs_gather_frags_v6(skb, |
| 1151 | ip_vs_defrag_user(hooknum))) |
| 1152 | return NF_STOLEN; |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1153 | } |
Julian Anastasov | 1ca5bb5 | 2010-10-17 16:32:29 +0300 | [diff] [blame] | 1154 | |
| 1155 | ip_vs_fill_iphdr(af, skb_network_header(skb), &iph); |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1156 | } else |
| 1157 | #endif |
Paul Gortmaker | 56f8a75 | 2011-06-21 20:33:34 -0700 | [diff] [blame] | 1158 | if (unlikely(ip_is_fragment(ip_hdr(skb)) && !pp->dont_defrag)) { |
Julian Anastasov | 1ca5bb5 | 2010-10-17 16:32:29 +0300 | [diff] [blame] | 1159 | if (ip_vs_gather_frags(skb, |
| 1160 | ip_vs_defrag_user(hooknum))) |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1161 | return NF_STOLEN; |
| 1162 | |
| 1163 | ip_vs_fill_iphdr(af, skb_network_header(skb), &iph); |
| 1164 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | |
| 1166 | /* |
| 1167 | * Check if the packet belongs to an existing entry |
| 1168 | */ |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1169 | cp = pp->conn_out_get(af, skb, &iph, iph.len, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1171 | if (likely(cp)) |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1172 | return handle_response(af, skb, pd, cp, iph.len); |
Simon Horman | 0cfa558 | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 1173 | if (sysctl_nat_icmp_send(net) && |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1174 | (pp->protocol == IPPROTO_TCP || |
| 1175 | pp->protocol == IPPROTO_UDP || |
| 1176 | pp->protocol == IPPROTO_SCTP)) { |
| 1177 | __be16 _ports[2], *pptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1179 | pptr = skb_header_pointer(skb, iph.len, |
| 1180 | sizeof(_ports), _ports); |
| 1181 | if (pptr == NULL) |
| 1182 | return NF_ACCEPT; /* Not for me */ |
Hans Schillstrom | fc72325 | 2011-01-03 14:44:43 +0100 | [diff] [blame] | 1183 | if (ip_vs_lookup_real_service(net, af, iph.protocol, |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1184 | &iph.saddr, |
| 1185 | pptr[0])) { |
| 1186 | /* |
| 1187 | * Notify the real server: there is no |
| 1188 | * existing entry if it is not RST |
| 1189 | * packet or not TCP packet. |
| 1190 | */ |
| 1191 | if ((iph.protocol != IPPROTO_TCP && |
| 1192 | iph.protocol != IPPROTO_SCTP) |
| 1193 | || ((iph.protocol == IPPROTO_TCP |
| 1194 | && !is_tcp_reset(skb, iph.len)) |
| 1195 | || (iph.protocol == IPPROTO_SCTP |
| 1196 | && !is_sctp_abort(skb, |
| 1197 | iph.len)))) { |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1198 | #ifdef CONFIG_IP_VS_IPV6 |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1199 | if (af == AF_INET6) { |
| 1200 | struct net *net = |
| 1201 | dev_net(skb_dst(skb)->dev); |
| 1202 | |
| 1203 | if (!skb->dev) |
| 1204 | skb->dev = net->loopback_dev; |
| 1205 | icmpv6_send(skb, |
| 1206 | ICMPV6_DEST_UNREACH, |
| 1207 | ICMPV6_PORT_UNREACH, |
| 1208 | 0); |
| 1209 | } else |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1210 | #endif |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1211 | icmp_send(skb, |
| 1212 | ICMP_DEST_UNREACH, |
| 1213 | ICMP_PORT_UNREACH, 0); |
| 1214 | return NF_DROP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | } |
| 1216 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1217 | } |
Julian Anastasov | 0d79641 | 2010-10-17 16:46:17 +0300 | [diff] [blame] | 1218 | IP_VS_DBG_PKT(12, af, pp, skb, 0, |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1219 | "ip_vs_out: packet continues traversal as normal"); |
| 1220 | return NF_ACCEPT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1221 | } |
| 1222 | |
Julian Anastasov | fc60476 | 2010-10-17 16:38:15 +0300 | [diff] [blame] | 1223 | /* |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1224 | * It is hooked at the NF_INET_FORWARD and NF_INET_LOCAL_IN chain, |
| 1225 | * used only for VS/NAT. |
Julian Anastasov | fc60476 | 2010-10-17 16:38:15 +0300 | [diff] [blame] | 1226 | * Check if packet is reply for established ip_vs_conn. |
| 1227 | */ |
| 1228 | static unsigned int |
| 1229 | ip_vs_reply4(unsigned int hooknum, struct sk_buff *skb, |
| 1230 | const struct net_device *in, const struct net_device *out, |
| 1231 | int (*okfn)(struct sk_buff *)) |
| 1232 | { |
| 1233 | return ip_vs_out(hooknum, skb, AF_INET); |
| 1234 | } |
| 1235 | |
| 1236 | /* |
| 1237 | * It is hooked at the NF_INET_LOCAL_OUT chain, used only for VS/NAT. |
| 1238 | * Check if packet is reply for established ip_vs_conn. |
| 1239 | */ |
| 1240 | static unsigned int |
| 1241 | ip_vs_local_reply4(unsigned int hooknum, struct sk_buff *skb, |
| 1242 | const struct net_device *in, const struct net_device *out, |
| 1243 | int (*okfn)(struct sk_buff *)) |
| 1244 | { |
| 1245 | unsigned int verdict; |
| 1246 | |
| 1247 | /* Disable BH in LOCAL_OUT until all places are fixed */ |
| 1248 | local_bh_disable(); |
| 1249 | verdict = ip_vs_out(hooknum, skb, AF_INET); |
| 1250 | local_bh_enable(); |
| 1251 | return verdict; |
| 1252 | } |
| 1253 | |
| 1254 | #ifdef CONFIG_IP_VS_IPV6 |
| 1255 | |
| 1256 | /* |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1257 | * It is hooked at the NF_INET_FORWARD and NF_INET_LOCAL_IN chain, |
| 1258 | * used only for VS/NAT. |
Julian Anastasov | fc60476 | 2010-10-17 16:38:15 +0300 | [diff] [blame] | 1259 | * Check if packet is reply for established ip_vs_conn. |
| 1260 | */ |
| 1261 | static unsigned int |
| 1262 | ip_vs_reply6(unsigned int hooknum, struct sk_buff *skb, |
| 1263 | const struct net_device *in, const struct net_device *out, |
| 1264 | int (*okfn)(struct sk_buff *)) |
| 1265 | { |
| 1266 | return ip_vs_out(hooknum, skb, AF_INET6); |
| 1267 | } |
| 1268 | |
| 1269 | /* |
| 1270 | * It is hooked at the NF_INET_LOCAL_OUT chain, used only for VS/NAT. |
| 1271 | * Check if packet is reply for established ip_vs_conn. |
| 1272 | */ |
| 1273 | static unsigned int |
| 1274 | ip_vs_local_reply6(unsigned int hooknum, struct sk_buff *skb, |
| 1275 | const struct net_device *in, const struct net_device *out, |
| 1276 | int (*okfn)(struct sk_buff *)) |
| 1277 | { |
| 1278 | unsigned int verdict; |
| 1279 | |
| 1280 | /* Disable BH in LOCAL_OUT until all places are fixed */ |
| 1281 | local_bh_disable(); |
| 1282 | verdict = ip_vs_out(hooknum, skb, AF_INET6); |
| 1283 | local_bh_enable(); |
| 1284 | return verdict; |
| 1285 | } |
| 1286 | |
| 1287 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1288 | |
| 1289 | /* |
| 1290 | * Handle ICMP messages in the outside-to-inside direction (incoming). |
| 1291 | * Find any that might be relevant, check against existing connections, |
| 1292 | * forward to the right destination host if relevant. |
| 1293 | * Currently handles error types - unreachable, quench, ttl exceeded. |
| 1294 | */ |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1295 | static int |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 1296 | ip_vs_in_icmp(struct sk_buff *skb, int *related, unsigned int hooknum) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1297 | { |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1298 | struct net *net = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | struct iphdr *iph; |
| 1300 | struct icmphdr _icmph, *ic; |
| 1301 | struct iphdr _ciph, *cih; /* The ip header contained within the ICMP */ |
Julius Volz | 51ef348 | 2008-09-02 15:55:40 +0200 | [diff] [blame] | 1302 | struct ip_vs_iphdr ciph; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | struct ip_vs_conn *cp; |
| 1304 | struct ip_vs_protocol *pp; |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1305 | struct ip_vs_proto_data *pd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1306 | unsigned int offset, ihl, verdict; |
| 1307 | |
| 1308 | *related = 1; |
| 1309 | |
| 1310 | /* reassemble IP fragments */ |
Paul Gortmaker | 56f8a75 | 2011-06-21 20:33:34 -0700 | [diff] [blame] | 1311 | if (ip_is_fragment(ip_hdr(skb))) { |
Julian Anastasov | 1ca5bb5 | 2010-10-17 16:32:29 +0300 | [diff] [blame] | 1312 | if (ip_vs_gather_frags(skb, ip_vs_defrag_user(hooknum))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1313 | return NF_STOLEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | } |
| 1315 | |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 1316 | iph = ip_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1317 | offset = ihl = iph->ihl * 4; |
| 1318 | ic = skb_header_pointer(skb, offset, sizeof(_icmph), &_icmph); |
| 1319 | if (ic == NULL) |
| 1320 | return NF_DROP; |
| 1321 | |
Harvey Harrison | 14d5e83 | 2008-10-31 00:54:29 -0700 | [diff] [blame] | 1322 | IP_VS_DBG(12, "Incoming ICMP (%d,%d) %pI4->%pI4\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1323 | ic->type, ntohs(icmp_id(ic)), |
Harvey Harrison | 14d5e83 | 2008-10-31 00:54:29 -0700 | [diff] [blame] | 1324 | &iph->saddr, &iph->daddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1325 | |
| 1326 | /* |
| 1327 | * Work through seeing if this is for us. |
| 1328 | * These checks are supposed to be in an order that means easy |
| 1329 | * things are checked first to speed up processing.... however |
| 1330 | * this means that some packets will manage to get a long way |
| 1331 | * down this stack and then be rejected, but that's life. |
| 1332 | */ |
| 1333 | if ((ic->type != ICMP_DEST_UNREACH) && |
| 1334 | (ic->type != ICMP_SOURCE_QUENCH) && |
| 1335 | (ic->type != ICMP_TIME_EXCEEDED)) { |
| 1336 | *related = 0; |
| 1337 | return NF_ACCEPT; |
| 1338 | } |
| 1339 | |
| 1340 | /* Now find the contained IP header */ |
| 1341 | offset += sizeof(_icmph); |
| 1342 | cih = skb_header_pointer(skb, offset, sizeof(_ciph), &_ciph); |
| 1343 | if (cih == NULL) |
| 1344 | return NF_ACCEPT; /* The packet looks wrong, ignore */ |
| 1345 | |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1346 | net = skb_net(skb); |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1347 | |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1348 | pd = ip_vs_proto_data_get(net, cih->protocol); |
| 1349 | if (!pd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1350 | return NF_ACCEPT; |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1351 | pp = pd->pp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1352 | |
| 1353 | /* Is the embedded protocol header present? */ |
YOSHIFUJI Hideaki | 4412ec4 | 2007-03-07 14:19:10 +0900 | [diff] [blame] | 1354 | if (unlikely(cih->frag_off & htons(IP_OFFSET) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1355 | pp->dont_defrag)) |
| 1356 | return NF_ACCEPT; |
| 1357 | |
Julian Anastasov | 0d79641 | 2010-10-17 16:46:17 +0300 | [diff] [blame] | 1358 | IP_VS_DBG_PKT(11, AF_INET, pp, skb, offset, |
| 1359 | "Checking incoming ICMP for"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | |
| 1361 | offset += cih->ihl * 4; |
| 1362 | |
Julius Volz | 51ef348 | 2008-09-02 15:55:40 +0200 | [diff] [blame] | 1363 | ip_vs_fill_iphdr(AF_INET, cih, &ciph); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1364 | /* The embedded headers contain source and dest in reverse order */ |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1365 | cp = pp->conn_in_get(AF_INET, skb, &ciph, offset, 1); |
Julian Anastasov | 6cb90db | 2011-02-09 02:26:38 +0200 | [diff] [blame] | 1366 | if (!cp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1367 | return NF_ACCEPT; |
| 1368 | |
| 1369 | verdict = NF_DROP; |
| 1370 | |
| 1371 | /* Ensure the checksum is correct */ |
Herbert Xu | 6047637 | 2007-04-09 11:59:39 -0700 | [diff] [blame] | 1372 | if (!skb_csum_unnecessary(skb) && ip_vs_checksum_complete(skb, ihl)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1373 | /* Failed checksum! */ |
Harvey Harrison | 14d5e83 | 2008-10-31 00:54:29 -0700 | [diff] [blame] | 1374 | IP_VS_DBG(1, "Incoming ICMP: failed checksum from %pI4!\n", |
| 1375 | &iph->saddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1376 | goto out; |
| 1377 | } |
| 1378 | |
| 1379 | /* do the statistics and put it back */ |
| 1380 | ip_vs_in_stats(cp, skb); |
| 1381 | if (IPPROTO_TCP == cih->protocol || IPPROTO_UDP == cih->protocol) |
| 1382 | offset += 2 * sizeof(__u16); |
Julian Anastasov | c92f5ca | 2011-05-10 12:46:05 +0000 | [diff] [blame] | 1383 | verdict = ip_vs_icmp_xmit(skb, cp, pp, offset, hooknum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1384 | |
Hans Schillstrom | 552ad65 | 2011-06-13 12:19:26 +0200 | [diff] [blame] | 1385 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | __ip_vs_conn_put(cp); |
| 1387 | |
| 1388 | return verdict; |
| 1389 | } |
| 1390 | |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1391 | #ifdef CONFIG_IP_VS_IPV6 |
| 1392 | static int |
| 1393 | ip_vs_in_icmp_v6(struct sk_buff *skb, int *related, unsigned int hooknum) |
| 1394 | { |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1395 | struct net *net = NULL; |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1396 | struct ipv6hdr *iph; |
| 1397 | struct icmp6hdr _icmph, *ic; |
| 1398 | struct ipv6hdr _ciph, *cih; /* The ip header contained |
| 1399 | within the ICMP */ |
| 1400 | struct ip_vs_iphdr ciph; |
| 1401 | struct ip_vs_conn *cp; |
| 1402 | struct ip_vs_protocol *pp; |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1403 | struct ip_vs_proto_data *pd; |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1404 | unsigned int offset, verdict; |
| 1405 | |
| 1406 | *related = 1; |
| 1407 | |
| 1408 | /* reassemble IP fragments */ |
| 1409 | if (ipv6_hdr(skb)->nexthdr == IPPROTO_FRAGMENT) { |
Julian Anastasov | 1ca5bb5 | 2010-10-17 16:32:29 +0300 | [diff] [blame] | 1410 | if (ip_vs_gather_frags_v6(skb, ip_vs_defrag_user(hooknum))) |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1411 | return NF_STOLEN; |
| 1412 | } |
| 1413 | |
| 1414 | iph = ipv6_hdr(skb); |
| 1415 | offset = sizeof(struct ipv6hdr); |
| 1416 | ic = skb_header_pointer(skb, offset, sizeof(_icmph), &_icmph); |
| 1417 | if (ic == NULL) |
| 1418 | return NF_DROP; |
| 1419 | |
Harvey Harrison | 5b095d989 | 2008-10-29 12:52:50 -0700 | [diff] [blame] | 1420 | IP_VS_DBG(12, "Incoming ICMPv6 (%d,%d) %pI6->%pI6\n", |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1421 | ic->icmp6_type, ntohs(icmpv6_id(ic)), |
Harvey Harrison | 38ff4fa | 2008-10-28 16:08:13 -0700 | [diff] [blame] | 1422 | &iph->saddr, &iph->daddr); |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1423 | |
| 1424 | /* |
| 1425 | * Work through seeing if this is for us. |
| 1426 | * These checks are supposed to be in an order that means easy |
| 1427 | * things are checked first to speed up processing.... however |
| 1428 | * this means that some packets will manage to get a long way |
| 1429 | * down this stack and then be rejected, but that's life. |
| 1430 | */ |
| 1431 | if ((ic->icmp6_type != ICMPV6_DEST_UNREACH) && |
| 1432 | (ic->icmp6_type != ICMPV6_PKT_TOOBIG) && |
| 1433 | (ic->icmp6_type != ICMPV6_TIME_EXCEED)) { |
| 1434 | *related = 0; |
| 1435 | return NF_ACCEPT; |
| 1436 | } |
| 1437 | |
| 1438 | /* Now find the contained IP header */ |
| 1439 | offset += sizeof(_icmph); |
| 1440 | cih = skb_header_pointer(skb, offset, sizeof(_ciph), &_ciph); |
| 1441 | if (cih == NULL) |
| 1442 | return NF_ACCEPT; /* The packet looks wrong, ignore */ |
| 1443 | |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1444 | net = skb_net(skb); |
| 1445 | pd = ip_vs_proto_data_get(net, cih->nexthdr); |
| 1446 | if (!pd) |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1447 | return NF_ACCEPT; |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1448 | pp = pd->pp; |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1449 | |
| 1450 | /* Is the embedded protocol header present? */ |
| 1451 | /* TODO: we don't support fragmentation at the moment anyways */ |
| 1452 | if (unlikely(cih->nexthdr == IPPROTO_FRAGMENT && pp->dont_defrag)) |
| 1453 | return NF_ACCEPT; |
| 1454 | |
Julian Anastasov | 0d79641 | 2010-10-17 16:46:17 +0300 | [diff] [blame] | 1455 | IP_VS_DBG_PKT(11, AF_INET6, pp, skb, offset, |
| 1456 | "Checking incoming ICMPv6 for"); |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1457 | |
| 1458 | offset += sizeof(struct ipv6hdr); |
| 1459 | |
| 1460 | ip_vs_fill_iphdr(AF_INET6, cih, &ciph); |
| 1461 | /* The embedded headers contain source and dest in reverse order */ |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1462 | cp = pp->conn_in_get(AF_INET6, skb, &ciph, offset, 1); |
Julian Anastasov | 6cb90db | 2011-02-09 02:26:38 +0200 | [diff] [blame] | 1463 | if (!cp) |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1464 | return NF_ACCEPT; |
| 1465 | |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1466 | /* do the statistics and put it back */ |
| 1467 | ip_vs_in_stats(cp, skb); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 1468 | if (IPPROTO_TCP == cih->nexthdr || IPPROTO_UDP == cih->nexthdr || |
| 1469 | IPPROTO_SCTP == cih->nexthdr) |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1470 | offset += 2 * sizeof(__u16); |
Julian Anastasov | c92f5ca | 2011-05-10 12:46:05 +0000 | [diff] [blame] | 1471 | verdict = ip_vs_icmp_xmit_v6(skb, cp, pp, offset, hooknum); |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1472 | |
| 1473 | __ip_vs_conn_put(cp); |
| 1474 | |
| 1475 | return verdict; |
| 1476 | } |
| 1477 | #endif |
| 1478 | |
| 1479 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1480 | /* |
| 1481 | * Check if it's for virtual services, look it up, |
| 1482 | * and send it on its way... |
| 1483 | */ |
| 1484 | static unsigned int |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1485 | ip_vs_in(unsigned int hooknum, struct sk_buff *skb, int af) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1486 | { |
Hans Schillstrom | f131315 | 2011-01-03 14:44:55 +0100 | [diff] [blame] | 1487 | struct net *net; |
Julius Volz | 51ef348 | 2008-09-02 15:55:40 +0200 | [diff] [blame] | 1488 | struct ip_vs_iphdr iph; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1489 | struct ip_vs_protocol *pp; |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1490 | struct ip_vs_proto_data *pd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1491 | struct ip_vs_conn *cp; |
Simon Horman | 4a516f1 | 2011-09-16 14:11:49 +0900 | [diff] [blame] | 1492 | int ret, pkts; |
Hans Schillstrom | f131315 | 2011-01-03 14:44:55 +0100 | [diff] [blame] | 1493 | struct netns_ipvs *ipvs; |
Julius Volz | 51ef348 | 2008-09-02 15:55:40 +0200 | [diff] [blame] | 1494 | |
Julian Anastasov | fc60476 | 2010-10-17 16:38:15 +0300 | [diff] [blame] | 1495 | /* Already marked as IPVS request or reply? */ |
| 1496 | if (skb->ipvs_property) |
| 1497 | return NF_ACCEPT; |
| 1498 | |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1499 | /* |
| 1500 | * Big tappo: |
| 1501 | * - remote client: only PACKET_HOST |
| 1502 | * - route: used for struct net when skb->dev is unset |
| 1503 | */ |
| 1504 | if (unlikely((skb->pkt_type != PACKET_HOST && |
| 1505 | hooknum != NF_INET_LOCAL_OUT) || |
| 1506 | !skb_dst(skb))) { |
| 1507 | ip_vs_fill_iphdr(af, skb_network_header(skb), &iph); |
| 1508 | IP_VS_DBG_BUF(12, "packet type=%d proto=%d daddr=%s" |
| 1509 | " ignored in hook %u\n", |
| 1510 | skb->pkt_type, iph.protocol, |
| 1511 | IP_VS_DBG_ADDR(af, &iph.daddr), hooknum); |
| 1512 | return NF_ACCEPT; |
| 1513 | } |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1514 | /* ipvs enabled in this netns ? */ |
| 1515 | net = skb_net(skb); |
| 1516 | if (!net_ipvs(net)->enable) |
| 1517 | return NF_ACCEPT; |
| 1518 | |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1519 | ip_vs_fill_iphdr(af, skb_network_header(skb), &iph); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1520 | |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1521 | /* Bad... Do not break raw sockets */ |
| 1522 | if (unlikely(skb->sk != NULL && hooknum == NF_INET_LOCAL_OUT && |
| 1523 | af == AF_INET)) { |
| 1524 | struct sock *sk = skb->sk; |
| 1525 | struct inet_sock *inet = inet_sk(skb->sk); |
| 1526 | |
| 1527 | if (inet && sk->sk_family == PF_INET && inet->nodefrag) |
| 1528 | return NF_ACCEPT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1529 | } |
| 1530 | |
Julius Volz | 94b2655 | 2009-08-31 16:22:23 +0200 | [diff] [blame] | 1531 | #ifdef CONFIG_IP_VS_IPV6 |
| 1532 | if (af == AF_INET6) { |
| 1533 | if (unlikely(iph.protocol == IPPROTO_ICMPV6)) { |
Julian Anastasov | 1ca5bb5 | 2010-10-17 16:32:29 +0300 | [diff] [blame] | 1534 | int related; |
| 1535 | int verdict = ip_vs_in_icmp_v6(skb, &related, hooknum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1536 | |
Julius Volz | 94b2655 | 2009-08-31 16:22:23 +0200 | [diff] [blame] | 1537 | if (related) |
| 1538 | return verdict; |
| 1539 | ip_vs_fill_iphdr(af, skb_network_header(skb), &iph); |
| 1540 | } |
| 1541 | } else |
| 1542 | #endif |
| 1543 | if (unlikely(iph.protocol == IPPROTO_ICMP)) { |
Julian Anastasov | 1ca5bb5 | 2010-10-17 16:32:29 +0300 | [diff] [blame] | 1544 | int related; |
| 1545 | int verdict = ip_vs_in_icmp(skb, &related, hooknum); |
Julius Volz | 94b2655 | 2009-08-31 16:22:23 +0200 | [diff] [blame] | 1546 | |
| 1547 | if (related) |
| 1548 | return verdict; |
| 1549 | ip_vs_fill_iphdr(af, skb_network_header(skb), &iph); |
| 1550 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1551 | |
| 1552 | /* Protocol supported? */ |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1553 | pd = ip_vs_proto_data_get(net, iph.protocol); |
| 1554 | if (unlikely(!pd)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1555 | return NF_ACCEPT; |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1556 | pp = pd->pp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1557 | /* |
| 1558 | * Check if the packet belongs to an existing connection entry |
| 1559 | */ |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1560 | cp = pp->conn_in_get(af, skb, &iph, iph.len, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1561 | |
| 1562 | if (unlikely(!cp)) { |
| 1563 | int v; |
| 1564 | |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1565 | if (!pp->conn_schedule(af, skb, pd, &v, &cp)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1566 | return v; |
| 1567 | } |
| 1568 | |
| 1569 | if (unlikely(!cp)) { |
| 1570 | /* sorry, all this trouble for a no-hit :) */ |
Julian Anastasov | 0d79641 | 2010-10-17 16:46:17 +0300 | [diff] [blame] | 1571 | IP_VS_DBG_PKT(12, af, pp, skb, 0, |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1572 | "ip_vs_in: packet continues traversal as normal"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1573 | return NF_ACCEPT; |
| 1574 | } |
| 1575 | |
Julian Anastasov | 0d79641 | 2010-10-17 16:46:17 +0300 | [diff] [blame] | 1576 | IP_VS_DBG_PKT(11, af, pp, skb, 0, "Incoming packet"); |
Hans Schillstrom | f131315 | 2011-01-03 14:44:55 +0100 | [diff] [blame] | 1577 | ipvs = net_ipvs(net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1578 | /* Check the server status */ |
| 1579 | if (cp->dest && !(cp->dest->flags & IP_VS_DEST_F_AVAILABLE)) { |
| 1580 | /* the destination server is not available */ |
| 1581 | |
Simon Horman | 71a8ab6 | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 1582 | if (sysctl_expire_nodest_conn(ipvs)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1583 | /* try to expire the connection immediately */ |
| 1584 | ip_vs_conn_expire_now(cp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1585 | } |
Julian Anastasov | dc8103f | 2005-11-08 09:40:05 -0800 | [diff] [blame] | 1586 | /* don't restart its timer, and silently |
| 1587 | drop the packet. */ |
| 1588 | __ip_vs_conn_put(cp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | return NF_DROP; |
| 1590 | } |
| 1591 | |
| 1592 | ip_vs_in_stats(cp, skb); |
Simon Horman | 4a516f1 | 2011-09-16 14:11:49 +0900 | [diff] [blame] | 1593 | ip_vs_set_state(cp, IP_VS_DIR_INPUT, skb, pd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1594 | if (cp->packet_xmit) |
| 1595 | ret = cp->packet_xmit(skb, cp, pp); |
| 1596 | /* do not touch skb anymore */ |
| 1597 | else { |
| 1598 | IP_VS_DBG_RL("warning: packet_xmit is null"); |
| 1599 | ret = NF_ACCEPT; |
| 1600 | } |
| 1601 | |
Rumen G. Bogdanovski | efac527 | 2007-11-07 02:36:55 -0800 | [diff] [blame] | 1602 | /* Increase its packet counter and check if it is needed |
| 1603 | * to be synchronized |
| 1604 | * |
| 1605 | * Sync connection if it is about to close to |
| 1606 | * encorage the standby servers to update the connections timeout |
Hans Schillstrom | 986a075 | 2010-11-19 14:25:13 +0100 | [diff] [blame] | 1607 | * |
| 1608 | * For ONE_PKT let ip_vs_sync_conn() do the filter work. |
Rumen G. Bogdanovski | efac527 | 2007-11-07 02:36:55 -0800 | [diff] [blame] | 1609 | */ |
Hans Schillstrom | f131315 | 2011-01-03 14:44:55 +0100 | [diff] [blame] | 1610 | |
Hans Schillstrom | 986a075 | 2010-11-19 14:25:13 +0100 | [diff] [blame] | 1611 | if (cp->flags & IP_VS_CONN_F_ONE_PACKET) |
Simon Horman | 59e0350 | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 1612 | pkts = sysctl_sync_threshold(ipvs); |
Hans Schillstrom | 986a075 | 2010-11-19 14:25:13 +0100 | [diff] [blame] | 1613 | else |
| 1614 | pkts = atomic_add_return(1, &cp->in_pkts); |
| 1615 | |
Hans Schillstrom | f131315 | 2011-01-03 14:44:55 +0100 | [diff] [blame] | 1616 | if ((ipvs->sync_state & IP_VS_STATE_MASTER) && |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 1617 | cp->protocol == IPPROTO_SCTP) { |
| 1618 | if ((cp->state == IP_VS_SCTP_S_ESTABLISHED && |
Simon Horman | 59e0350 | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 1619 | (pkts % sysctl_sync_period(ipvs) |
| 1620 | == sysctl_sync_threshold(ipvs))) || |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 1621 | (cp->old_state != cp->state && |
| 1622 | ((cp->state == IP_VS_SCTP_S_CLOSED) || |
| 1623 | (cp->state == IP_VS_SCTP_S_SHUT_ACK_CLI) || |
| 1624 | (cp->state == IP_VS_SCTP_S_SHUT_ACK_SER)))) { |
Hans Schillstrom | f131315 | 2011-01-03 14:44:55 +0100 | [diff] [blame] | 1625 | ip_vs_sync_conn(net, cp); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 1626 | goto out; |
| 1627 | } |
| 1628 | } |
| 1629 | |
Julian Anastasov | 8ed2163 | 2010-09-01 22:19:14 +0000 | [diff] [blame] | 1630 | /* Keep this block last: TCP and others with pp->num_states <= 1 */ |
Hans Schillstrom | f131315 | 2011-01-03 14:44:55 +0100 | [diff] [blame] | 1631 | else if ((ipvs->sync_state & IP_VS_STATE_MASTER) && |
Rumen G. Bogdanovski | efac527 | 2007-11-07 02:36:55 -0800 | [diff] [blame] | 1632 | (((cp->protocol != IPPROTO_TCP || |
| 1633 | cp->state == IP_VS_TCP_S_ESTABLISHED) && |
Simon Horman | 59e0350 | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 1634 | (pkts % sysctl_sync_period(ipvs) |
| 1635 | == sysctl_sync_threshold(ipvs))) || |
Rumen G. Bogdanovski | efac527 | 2007-11-07 02:36:55 -0800 | [diff] [blame] | 1636 | ((cp->protocol == IPPROTO_TCP) && (cp->old_state != cp->state) && |
| 1637 | ((cp->state == IP_VS_TCP_S_FIN_WAIT) || |
Xiaotian Feng | 9abfe31 | 2009-12-14 16:38:21 +0100 | [diff] [blame] | 1638 | (cp->state == IP_VS_TCP_S_CLOSE) || |
Rumen G. Bogdanovski | 9d3a0de | 2008-07-16 20:04:23 -0700 | [diff] [blame] | 1639 | (cp->state == IP_VS_TCP_S_CLOSE_WAIT) || |
| 1640 | (cp->state == IP_VS_TCP_S_TIME_WAIT))))) |
Hans Schillstrom | f131315 | 2011-01-03 14:44:55 +0100 | [diff] [blame] | 1641 | ip_vs_sync_conn(net, cp); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 1642 | out: |
Rumen G. Bogdanovski | efac527 | 2007-11-07 02:36:55 -0800 | [diff] [blame] | 1643 | cp->old_state = cp->state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1644 | |
| 1645 | ip_vs_conn_put(cp); |
| 1646 | return ret; |
| 1647 | } |
| 1648 | |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1649 | /* |
| 1650 | * AF_INET handler in NF_INET_LOCAL_IN chain |
| 1651 | * Schedule and forward packets from remote clients |
| 1652 | */ |
| 1653 | static unsigned int |
| 1654 | ip_vs_remote_request4(unsigned int hooknum, struct sk_buff *skb, |
| 1655 | const struct net_device *in, |
| 1656 | const struct net_device *out, |
| 1657 | int (*okfn)(struct sk_buff *)) |
| 1658 | { |
| 1659 | return ip_vs_in(hooknum, skb, AF_INET); |
| 1660 | } |
| 1661 | |
| 1662 | /* |
| 1663 | * AF_INET handler in NF_INET_LOCAL_OUT chain |
| 1664 | * Schedule and forward packets from local clients |
| 1665 | */ |
| 1666 | static unsigned int |
| 1667 | ip_vs_local_request4(unsigned int hooknum, struct sk_buff *skb, |
| 1668 | const struct net_device *in, const struct net_device *out, |
| 1669 | int (*okfn)(struct sk_buff *)) |
| 1670 | { |
| 1671 | unsigned int verdict; |
| 1672 | |
| 1673 | /* Disable BH in LOCAL_OUT until all places are fixed */ |
| 1674 | local_bh_disable(); |
| 1675 | verdict = ip_vs_in(hooknum, skb, AF_INET); |
| 1676 | local_bh_enable(); |
| 1677 | return verdict; |
| 1678 | } |
| 1679 | |
| 1680 | #ifdef CONFIG_IP_VS_IPV6 |
| 1681 | |
| 1682 | /* |
| 1683 | * AF_INET6 handler in NF_INET_LOCAL_IN chain |
| 1684 | * Schedule and forward packets from remote clients |
| 1685 | */ |
| 1686 | static unsigned int |
| 1687 | ip_vs_remote_request6(unsigned int hooknum, struct sk_buff *skb, |
| 1688 | const struct net_device *in, |
| 1689 | const struct net_device *out, |
| 1690 | int (*okfn)(struct sk_buff *)) |
| 1691 | { |
| 1692 | return ip_vs_in(hooknum, skb, AF_INET6); |
| 1693 | } |
| 1694 | |
| 1695 | /* |
| 1696 | * AF_INET6 handler in NF_INET_LOCAL_OUT chain |
| 1697 | * Schedule and forward packets from local clients |
| 1698 | */ |
| 1699 | static unsigned int |
| 1700 | ip_vs_local_request6(unsigned int hooknum, struct sk_buff *skb, |
| 1701 | const struct net_device *in, const struct net_device *out, |
| 1702 | int (*okfn)(struct sk_buff *)) |
| 1703 | { |
| 1704 | unsigned int verdict; |
| 1705 | |
| 1706 | /* Disable BH in LOCAL_OUT until all places are fixed */ |
| 1707 | local_bh_disable(); |
| 1708 | verdict = ip_vs_in(hooknum, skb, AF_INET6); |
| 1709 | local_bh_enable(); |
| 1710 | return verdict; |
| 1711 | } |
| 1712 | |
| 1713 | #endif |
| 1714 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1715 | |
| 1716 | /* |
Patrick McHardy | 6e23ae2 | 2007-11-19 18:53:30 -0800 | [diff] [blame] | 1717 | * It is hooked at the NF_INET_FORWARD chain, in order to catch ICMP |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1718 | * related packets destined for 0.0.0.0/0. |
| 1719 | * When fwmark-based virtual service is used, such as transparent |
| 1720 | * cache cluster, TCP packets can be marked and routed to ip_vs_in, |
| 1721 | * but ICMP destined for 0.0.0.0/0 cannot not be easily marked and |
Patrick McHardy | 6e23ae2 | 2007-11-19 18:53:30 -0800 | [diff] [blame] | 1722 | * sent to ip_vs_in_icmp. So, catch them at the NF_INET_FORWARD chain |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1723 | * and send them to ip_vs_in_icmp. |
| 1724 | */ |
| 1725 | static unsigned int |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 1726 | ip_vs_forward_icmp(unsigned int hooknum, struct sk_buff *skb, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1727 | const struct net_device *in, const struct net_device *out, |
| 1728 | int (*okfn)(struct sk_buff *)) |
| 1729 | { |
| 1730 | int r; |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1731 | struct net *net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1732 | |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 1733 | if (ip_hdr(skb)->protocol != IPPROTO_ICMP) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1734 | return NF_ACCEPT; |
| 1735 | |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1736 | /* ipvs enabled in this netns ? */ |
| 1737 | net = skb_net(skb); |
| 1738 | if (!net_ipvs(net)->enable) |
| 1739 | return NF_ACCEPT; |
| 1740 | |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 1741 | return ip_vs_in_icmp(skb, &r, hooknum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1742 | } |
| 1743 | |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1744 | #ifdef CONFIG_IP_VS_IPV6 |
| 1745 | static unsigned int |
| 1746 | ip_vs_forward_icmp_v6(unsigned int hooknum, struct sk_buff *skb, |
| 1747 | const struct net_device *in, const struct net_device *out, |
| 1748 | int (*okfn)(struct sk_buff *)) |
| 1749 | { |
| 1750 | int r; |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1751 | struct net *net; |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1752 | |
| 1753 | if (ipv6_hdr(skb)->nexthdr != IPPROTO_ICMPV6) |
| 1754 | return NF_ACCEPT; |
| 1755 | |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1756 | /* ipvs enabled in this netns ? */ |
| 1757 | net = skb_net(skb); |
| 1758 | if (!net_ipvs(net)->enable) |
| 1759 | return NF_ACCEPT; |
| 1760 | |
Julius Volz | 2a3b791 | 2008-09-02 15:55:47 +0200 | [diff] [blame] | 1761 | return ip_vs_in_icmp_v6(skb, &r, hooknum); |
| 1762 | } |
| 1763 | #endif |
| 1764 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1765 | |
Patrick McHardy | 1999414 | 2007-12-05 01:23:00 -0800 | [diff] [blame] | 1766 | static struct nf_hook_ops ip_vs_ops[] __read_mostly = { |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1767 | /* After packet filtering, change source only for VS/NAT */ |
| 1768 | { |
| 1769 | .hook = ip_vs_reply4, |
| 1770 | .owner = THIS_MODULE, |
| 1771 | .pf = PF_INET, |
| 1772 | .hooknum = NF_INET_LOCAL_IN, |
Julian Anastasov | afb523c | 2011-06-02 09:09:54 +0900 | [diff] [blame] | 1773 | .priority = NF_IP_PRI_NAT_SRC - 2, |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1774 | }, |
Patrick McHardy | 41c5b31 | 2007-12-05 01:22:43 -0800 | [diff] [blame] | 1775 | /* After packet filtering, forward packet through VS/DR, VS/TUN, |
| 1776 | * or VS/NAT(change destination), so that filtering rules can be |
| 1777 | * applied to IPVS. */ |
| 1778 | { |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1779 | .hook = ip_vs_remote_request4, |
Patrick McHardy | 41c5b31 | 2007-12-05 01:22:43 -0800 | [diff] [blame] | 1780 | .owner = THIS_MODULE, |
| 1781 | .pf = PF_INET, |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1782 | .hooknum = NF_INET_LOCAL_IN, |
Julian Anastasov | afb523c | 2011-06-02 09:09:54 +0900 | [diff] [blame] | 1783 | .priority = NF_IP_PRI_NAT_SRC - 1, |
Patrick McHardy | 41c5b31 | 2007-12-05 01:22:43 -0800 | [diff] [blame] | 1784 | }, |
Julian Anastasov | fc60476 | 2010-10-17 16:38:15 +0300 | [diff] [blame] | 1785 | /* Before ip_vs_in, change source only for VS/NAT */ |
Patrick McHardy | 41c5b31 | 2007-12-05 01:22:43 -0800 | [diff] [blame] | 1786 | { |
Julian Anastasov | fc60476 | 2010-10-17 16:38:15 +0300 | [diff] [blame] | 1787 | .hook = ip_vs_local_reply4, |
Patrick McHardy | 41c5b31 | 2007-12-05 01:22:43 -0800 | [diff] [blame] | 1788 | .owner = THIS_MODULE, |
| 1789 | .pf = PF_INET, |
Julian Anastasov | fc60476 | 2010-10-17 16:38:15 +0300 | [diff] [blame] | 1790 | .hooknum = NF_INET_LOCAL_OUT, |
Julian Anastasov | afb523c | 2011-06-02 09:09:54 +0900 | [diff] [blame] | 1791 | .priority = NF_IP_PRI_NAT_DST + 1, |
Patrick McHardy | 41c5b31 | 2007-12-05 01:22:43 -0800 | [diff] [blame] | 1792 | }, |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1793 | /* After mangle, schedule and forward local requests */ |
| 1794 | { |
| 1795 | .hook = ip_vs_local_request4, |
| 1796 | .owner = THIS_MODULE, |
| 1797 | .pf = PF_INET, |
| 1798 | .hooknum = NF_INET_LOCAL_OUT, |
Julian Anastasov | afb523c | 2011-06-02 09:09:54 +0900 | [diff] [blame] | 1799 | .priority = NF_IP_PRI_NAT_DST + 2, |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1800 | }, |
Patrick McHardy | 41c5b31 | 2007-12-05 01:22:43 -0800 | [diff] [blame] | 1801 | /* After packet filtering (but before ip_vs_out_icmp), catch icmp |
| 1802 | * destined for 0.0.0.0/0, which is for incoming IPVS connections */ |
| 1803 | { |
| 1804 | .hook = ip_vs_forward_icmp, |
| 1805 | .owner = THIS_MODULE, |
| 1806 | .pf = PF_INET, |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1807 | .hooknum = NF_INET_FORWARD, |
| 1808 | .priority = 99, |
Patrick McHardy | 41c5b31 | 2007-12-05 01:22:43 -0800 | [diff] [blame] | 1809 | }, |
Julian Anastasov | fc60476 | 2010-10-17 16:38:15 +0300 | [diff] [blame] | 1810 | /* After packet filtering, change source only for VS/NAT */ |
| 1811 | { |
| 1812 | .hook = ip_vs_reply4, |
| 1813 | .owner = THIS_MODULE, |
| 1814 | .pf = PF_INET, |
| 1815 | .hooknum = NF_INET_FORWARD, |
| 1816 | .priority = 100, |
| 1817 | }, |
Julius Volz | 473b23d | 2008-09-02 15:55:54 +0200 | [diff] [blame] | 1818 | #ifdef CONFIG_IP_VS_IPV6 |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1819 | /* After packet filtering, change source only for VS/NAT */ |
| 1820 | { |
| 1821 | .hook = ip_vs_reply6, |
| 1822 | .owner = THIS_MODULE, |
| 1823 | .pf = PF_INET6, |
| 1824 | .hooknum = NF_INET_LOCAL_IN, |
Julian Anastasov | afb523c | 2011-06-02 09:09:54 +0900 | [diff] [blame] | 1825 | .priority = NF_IP6_PRI_NAT_SRC - 2, |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1826 | }, |
Julius Volz | 473b23d | 2008-09-02 15:55:54 +0200 | [diff] [blame] | 1827 | /* After packet filtering, forward packet through VS/DR, VS/TUN, |
| 1828 | * or VS/NAT(change destination), so that filtering rules can be |
| 1829 | * applied to IPVS. */ |
| 1830 | { |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1831 | .hook = ip_vs_remote_request6, |
Julius Volz | 473b23d | 2008-09-02 15:55:54 +0200 | [diff] [blame] | 1832 | .owner = THIS_MODULE, |
| 1833 | .pf = PF_INET6, |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1834 | .hooknum = NF_INET_LOCAL_IN, |
Julian Anastasov | afb523c | 2011-06-02 09:09:54 +0900 | [diff] [blame] | 1835 | .priority = NF_IP6_PRI_NAT_SRC - 1, |
Julius Volz | 473b23d | 2008-09-02 15:55:54 +0200 | [diff] [blame] | 1836 | }, |
Julian Anastasov | fc60476 | 2010-10-17 16:38:15 +0300 | [diff] [blame] | 1837 | /* Before ip_vs_in, change source only for VS/NAT */ |
Julius Volz | 473b23d | 2008-09-02 15:55:54 +0200 | [diff] [blame] | 1838 | { |
Julian Anastasov | fc60476 | 2010-10-17 16:38:15 +0300 | [diff] [blame] | 1839 | .hook = ip_vs_local_reply6, |
Julius Volz | 473b23d | 2008-09-02 15:55:54 +0200 | [diff] [blame] | 1840 | .owner = THIS_MODULE, |
Julian Anastasov | fc60476 | 2010-10-17 16:38:15 +0300 | [diff] [blame] | 1841 | .pf = PF_INET, |
| 1842 | .hooknum = NF_INET_LOCAL_OUT, |
Julian Anastasov | afb523c | 2011-06-02 09:09:54 +0900 | [diff] [blame] | 1843 | .priority = NF_IP6_PRI_NAT_DST + 1, |
Julius Volz | 473b23d | 2008-09-02 15:55:54 +0200 | [diff] [blame] | 1844 | }, |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1845 | /* After mangle, schedule and forward local requests */ |
| 1846 | { |
| 1847 | .hook = ip_vs_local_request6, |
| 1848 | .owner = THIS_MODULE, |
| 1849 | .pf = PF_INET6, |
| 1850 | .hooknum = NF_INET_LOCAL_OUT, |
Julian Anastasov | afb523c | 2011-06-02 09:09:54 +0900 | [diff] [blame] | 1851 | .priority = NF_IP6_PRI_NAT_DST + 2, |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1852 | }, |
Julius Volz | 473b23d | 2008-09-02 15:55:54 +0200 | [diff] [blame] | 1853 | /* After packet filtering (but before ip_vs_out_icmp), catch icmp |
| 1854 | * destined for 0.0.0.0/0, which is for incoming IPVS connections */ |
| 1855 | { |
| 1856 | .hook = ip_vs_forward_icmp_v6, |
| 1857 | .owner = THIS_MODULE, |
| 1858 | .pf = PF_INET6, |
Julian Anastasov | cb59155 | 2010-10-17 16:40:51 +0300 | [diff] [blame] | 1859 | .hooknum = NF_INET_FORWARD, |
| 1860 | .priority = 99, |
Julius Volz | 473b23d | 2008-09-02 15:55:54 +0200 | [diff] [blame] | 1861 | }, |
Julian Anastasov | fc60476 | 2010-10-17 16:38:15 +0300 | [diff] [blame] | 1862 | /* After packet filtering, change source only for VS/NAT */ |
| 1863 | { |
| 1864 | .hook = ip_vs_reply6, |
| 1865 | .owner = THIS_MODULE, |
| 1866 | .pf = PF_INET6, |
| 1867 | .hooknum = NF_INET_FORWARD, |
| 1868 | .priority = 100, |
| 1869 | }, |
Julius Volz | 473b23d | 2008-09-02 15:55:54 +0200 | [diff] [blame] | 1870 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1871 | }; |
Hans Schillstrom | 61b1ab4 | 2011-01-03 14:44:42 +0100 | [diff] [blame] | 1872 | /* |
| 1873 | * Initialize IP Virtual Server netns mem. |
| 1874 | */ |
| 1875 | static int __net_init __ip_vs_init(struct net *net) |
| 1876 | { |
| 1877 | struct netns_ipvs *ipvs; |
| 1878 | |
Hans Schillstrom | 61b1ab4 | 2011-01-03 14:44:42 +0100 | [diff] [blame] | 1879 | ipvs = net_generic(net, ip_vs_net_id); |
Joe Perches | 0a9ee81 | 2011-08-29 14:17:25 -0700 | [diff] [blame] | 1880 | if (ipvs == NULL) |
Hans Schillstrom | 61b1ab4 | 2011-01-03 14:44:42 +0100 | [diff] [blame] | 1881 | return -ENOMEM; |
Joe Perches | 0a9ee81 | 2011-08-29 14:17:25 -0700 | [diff] [blame] | 1882 | |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1883 | /* Hold the beast until a service is registerd */ |
| 1884 | ipvs->enable = 0; |
Hans Schillstrom | f6340ee | 2011-01-03 14:44:59 +0100 | [diff] [blame] | 1885 | ipvs->net = net; |
Hans Schillstrom | 61b1ab4 | 2011-01-03 14:44:42 +0100 | [diff] [blame] | 1886 | /* Counters used for creating unique names */ |
| 1887 | ipvs->gen = atomic_read(&ipvs_netns_cnt); |
| 1888 | atomic_inc(&ipvs_netns_cnt); |
| 1889 | net->ipvs = ipvs; |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1890 | |
Hans Schillstrom | 503cf15 | 2011-05-01 18:50:16 +0200 | [diff] [blame] | 1891 | if (ip_vs_estimator_net_init(net) < 0) |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1892 | goto estimator_fail; |
| 1893 | |
Hans Schillstrom | 503cf15 | 2011-05-01 18:50:16 +0200 | [diff] [blame] | 1894 | if (ip_vs_control_net_init(net) < 0) |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1895 | goto control_fail; |
| 1896 | |
Hans Schillstrom | 503cf15 | 2011-05-01 18:50:16 +0200 | [diff] [blame] | 1897 | if (ip_vs_protocol_net_init(net) < 0) |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1898 | goto protocol_fail; |
| 1899 | |
Hans Schillstrom | 503cf15 | 2011-05-01 18:50:16 +0200 | [diff] [blame] | 1900 | if (ip_vs_app_net_init(net) < 0) |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1901 | goto app_fail; |
| 1902 | |
Hans Schillstrom | 503cf15 | 2011-05-01 18:50:16 +0200 | [diff] [blame] | 1903 | if (ip_vs_conn_net_init(net) < 0) |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1904 | goto conn_fail; |
| 1905 | |
Hans Schillstrom | 503cf15 | 2011-05-01 18:50:16 +0200 | [diff] [blame] | 1906 | if (ip_vs_sync_net_init(net) < 0) |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1907 | goto sync_fail; |
| 1908 | |
Simon Horman | a870c8c | 2011-02-01 18:21:53 +0100 | [diff] [blame] | 1909 | printk(KERN_INFO "IPVS: Creating netns size=%zu id=%d\n", |
Hans Schillstrom | 61b1ab4 | 2011-01-03 14:44:42 +0100 | [diff] [blame] | 1910 | sizeof(struct netns_ipvs), ipvs->gen); |
| 1911 | return 0; |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1912 | /* |
| 1913 | * Error handling |
| 1914 | */ |
| 1915 | |
| 1916 | sync_fail: |
Hans Schillstrom | 503cf15 | 2011-05-01 18:50:16 +0200 | [diff] [blame] | 1917 | ip_vs_conn_net_cleanup(net); |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1918 | conn_fail: |
Hans Schillstrom | 503cf15 | 2011-05-01 18:50:16 +0200 | [diff] [blame] | 1919 | ip_vs_app_net_cleanup(net); |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1920 | app_fail: |
Hans Schillstrom | 503cf15 | 2011-05-01 18:50:16 +0200 | [diff] [blame] | 1921 | ip_vs_protocol_net_cleanup(net); |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1922 | protocol_fail: |
Hans Schillstrom | 503cf15 | 2011-05-01 18:50:16 +0200 | [diff] [blame] | 1923 | ip_vs_control_net_cleanup(net); |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1924 | control_fail: |
Hans Schillstrom | 503cf15 | 2011-05-01 18:50:16 +0200 | [diff] [blame] | 1925 | ip_vs_estimator_net_cleanup(net); |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1926 | estimator_fail: |
Julian Anastasov | 39f618b | 2012-04-25 00:29:58 +0300 | [diff] [blame] | 1927 | net->ipvs = NULL; |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1928 | return -ENOMEM; |
Hans Schillstrom | 61b1ab4 | 2011-01-03 14:44:42 +0100 | [diff] [blame] | 1929 | } |
| 1930 | |
| 1931 | static void __net_exit __ip_vs_cleanup(struct net *net) |
| 1932 | { |
Hans Schillstrom | 503cf15 | 2011-05-01 18:50:16 +0200 | [diff] [blame] | 1933 | ip_vs_service_net_cleanup(net); /* ip_vs_flush() with locks */ |
| 1934 | ip_vs_conn_net_cleanup(net); |
| 1935 | ip_vs_app_net_cleanup(net); |
| 1936 | ip_vs_protocol_net_cleanup(net); |
| 1937 | ip_vs_control_net_cleanup(net); |
| 1938 | ip_vs_estimator_net_cleanup(net); |
Hans Schillstrom | 1ae132b | 2011-05-03 22:09:30 +0200 | [diff] [blame] | 1939 | IP_VS_DBG(2, "ipvs netns %d released\n", net_ipvs(net)->gen); |
Julian Anastasov | 39f618b | 2012-04-25 00:29:58 +0300 | [diff] [blame] | 1940 | net->ipvs = NULL; |
Hans Schillstrom | 61b1ab4 | 2011-01-03 14:44:42 +0100 | [diff] [blame] | 1941 | } |
| 1942 | |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1943 | static void __net_exit __ip_vs_dev_cleanup(struct net *net) |
| 1944 | { |
| 1945 | EnterFunction(2); |
| 1946 | net_ipvs(net)->enable = 0; /* Disable packet reception */ |
Hans Schillstrom | 8f4e0a1 | 2011-06-13 09:06:57 +0200 | [diff] [blame] | 1947 | smp_wmb(); |
Hans Schillstrom | 503cf15 | 2011-05-01 18:50:16 +0200 | [diff] [blame] | 1948 | ip_vs_sync_net_cleanup(net); |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1949 | LeaveFunction(2); |
| 1950 | } |
| 1951 | |
Hans Schillstrom | 61b1ab4 | 2011-01-03 14:44:42 +0100 | [diff] [blame] | 1952 | static struct pernet_operations ipvs_core_ops = { |
| 1953 | .init = __ip_vs_init, |
| 1954 | .exit = __ip_vs_cleanup, |
| 1955 | .id = &ip_vs_net_id, |
| 1956 | .size = sizeof(struct netns_ipvs), |
| 1957 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1958 | |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1959 | static struct pernet_operations ipvs_core_dev_ops = { |
| 1960 | .exit = __ip_vs_dev_cleanup, |
| 1961 | }; |
| 1962 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1963 | /* |
| 1964 | * Initialize IP Virtual Server |
| 1965 | */ |
| 1966 | static int __init ip_vs_init(void) |
| 1967 | { |
| 1968 | int ret; |
| 1969 | |
| 1970 | ret = ip_vs_control_init(); |
| 1971 | if (ret < 0) { |
Hannes Eder | 1e3e238 | 2009-08-02 11:05:41 +0000 | [diff] [blame] | 1972 | pr_err("can't setup control.\n"); |
Hans Schillstrom | 6c8f794 | 2011-06-13 12:19:27 +0200 | [diff] [blame] | 1973 | goto exit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1974 | } |
| 1975 | |
| 1976 | ip_vs_protocol_init(); |
| 1977 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1978 | ret = ip_vs_conn_init(); |
| 1979 | if (ret < 0) { |
Hannes Eder | 1e3e238 | 2009-08-02 11:05:41 +0000 | [diff] [blame] | 1980 | pr_err("can't setup connection table.\n"); |
Hans Schillstrom | 6c8f794 | 2011-06-13 12:19:27 +0200 | [diff] [blame] | 1981 | goto cleanup_protocol; |
Hans Schillstrom | 61b1ab4 | 2011-01-03 14:44:42 +0100 | [diff] [blame] | 1982 | } |
| 1983 | |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1984 | ret = register_pernet_subsys(&ipvs_core_ops); /* Alloc ip_vs struct */ |
| 1985 | if (ret < 0) |
Hans Schillstrom | 6c8f794 | 2011-06-13 12:19:27 +0200 | [diff] [blame] | 1986 | goto cleanup_conn; |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1987 | |
| 1988 | ret = register_pernet_device(&ipvs_core_dev_ops); |
| 1989 | if (ret < 0) |
| 1990 | goto cleanup_sub; |
| 1991 | |
Patrick McHardy | 41c5b31 | 2007-12-05 01:22:43 -0800 | [diff] [blame] | 1992 | ret = nf_register_hooks(ip_vs_ops, ARRAY_SIZE(ip_vs_ops)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1993 | if (ret < 0) { |
Hannes Eder | 1e3e238 | 2009-08-02 11:05:41 +0000 | [diff] [blame] | 1994 | pr_err("can't register hooks.\n"); |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1995 | goto cleanup_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1996 | } |
| 1997 | |
Hans Schillstrom | 8537de8 | 2012-04-26 07:47:44 +0200 | [diff] [blame] | 1998 | ret = ip_vs_register_nl_ioctl(); |
| 1999 | if (ret < 0) { |
| 2000 | pr_err("can't register netlink/ioctl.\n"); |
| 2001 | goto cleanup_hooks; |
| 2002 | } |
| 2003 | |
Hannes Eder | 1e3e238 | 2009-08-02 11:05:41 +0000 | [diff] [blame] | 2004 | pr_info("ipvs loaded.\n"); |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 2005 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2006 | return ret; |
| 2007 | |
Hans Schillstrom | 8537de8 | 2012-04-26 07:47:44 +0200 | [diff] [blame] | 2008 | cleanup_hooks: |
| 2009 | nf_unregister_hooks(ip_vs_ops, ARRAY_SIZE(ip_vs_ops)); |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 2010 | cleanup_dev: |
| 2011 | unregister_pernet_device(&ipvs_core_dev_ops); |
| 2012 | cleanup_sub: |
| 2013 | unregister_pernet_subsys(&ipvs_core_ops); |
Hans Schillstrom | 552ad65 | 2011-06-13 12:19:26 +0200 | [diff] [blame] | 2014 | cleanup_conn: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2015 | ip_vs_conn_cleanup(); |
Hans Schillstrom | 552ad65 | 2011-06-13 12:19:26 +0200 | [diff] [blame] | 2016 | cleanup_protocol: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2017 | ip_vs_protocol_cleanup(); |
| 2018 | ip_vs_control_cleanup(); |
Hans Schillstrom | 6c8f794 | 2011-06-13 12:19:27 +0200 | [diff] [blame] | 2019 | exit: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2020 | return ret; |
| 2021 | } |
| 2022 | |
| 2023 | static void __exit ip_vs_cleanup(void) |
| 2024 | { |
Hans Schillstrom | 8537de8 | 2012-04-26 07:47:44 +0200 | [diff] [blame] | 2025 | ip_vs_unregister_nl_ioctl(); |
Patrick McHardy | 41c5b31 | 2007-12-05 01:22:43 -0800 | [diff] [blame] | 2026 | nf_unregister_hooks(ip_vs_ops, ARRAY_SIZE(ip_vs_ops)); |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 2027 | unregister_pernet_device(&ipvs_core_dev_ops); |
| 2028 | unregister_pernet_subsys(&ipvs_core_ops); /* free ip_vs struct */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2029 | ip_vs_conn_cleanup(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2030 | ip_vs_protocol_cleanup(); |
| 2031 | ip_vs_control_cleanup(); |
Hannes Eder | 1e3e238 | 2009-08-02 11:05:41 +0000 | [diff] [blame] | 2032 | pr_info("ipvs unloaded.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2033 | } |
| 2034 | |
| 2035 | module_init(ip_vs_init); |
| 2036 | module_exit(ip_vs_cleanup); |
| 2037 | MODULE_LICENSE("GPL"); |