Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * IP Virtual Server |
| 3 | * data structure and functionality definitions |
| 4 | */ |
| 5 | |
Julius Volz | bc4768e | 2008-07-31 20:45:24 -0700 | [diff] [blame] | 6 | #ifndef _NET_IP_VS_H |
| 7 | #define _NET_IP_VS_H |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | |
Julius Volz | bc4768e | 2008-07-31 20:45:24 -0700 | [diff] [blame] | 9 | #include <linux/ip_vs.h> /* definitions shared with userland */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | |
Julius Volz | bc4768e | 2008-07-31 20:45:24 -0700 | [diff] [blame] | 11 | #include <asm/types.h> /* for __uXX types */ |
| 12 | |
| 13 | #include <linux/sysctl.h> /* for ctl_path */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/list.h> /* for struct list_head */ |
| 15 | #include <linux/spinlock.h> /* for struct rwlock_t */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <asm/atomic.h> /* for struct atomic_t */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/compiler.h> |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 18 | #include <linux/timer.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 20 | #include <net/checksum.h> |
Julius Volz | e7ade46 | 2008-09-02 15:55:33 +0200 | [diff] [blame] | 21 | #include <linux/netfilter.h> /* for union nf_inet_addr */ |
KOVACS Krisztian | 1668e01 | 2008-10-01 07:33:10 -0700 | [diff] [blame] | 22 | #include <linux/ip.h> |
Julius Volz | e7ade46 | 2008-09-02 15:55:33 +0200 | [diff] [blame] | 23 | #include <linux/ipv6.h> /* for struct ipv6hdr */ |
| 24 | #include <net/ipv6.h> /* for ipv6_addr_copy */ |
Julian Anastasov | cf356d6 | 2010-10-17 16:21:07 +0300 | [diff] [blame] | 25 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) |
Julian Anastasov | f4bc17c | 2010-09-21 17:35:41 +0200 | [diff] [blame] | 26 | #include <net/netfilter/nf_conntrack.h> |
| 27 | #endif |
Hans Schillstrom | 61b1ab4 | 2011-01-03 14:44:42 +0100 | [diff] [blame] | 28 | #include <net/net_namespace.h> /* Netw namespace */ |
| 29 | |
| 30 | /* |
| 31 | * Generic access of ipvs struct |
| 32 | */ |
| 33 | static inline struct netns_ipvs *net_ipvs(struct net* net) |
| 34 | { |
| 35 | return net->ipvs; |
| 36 | } |
Hans Schillstrom | fc72325 | 2011-01-03 14:44:43 +0100 | [diff] [blame] | 37 | /* |
| 38 | * Get net ptr from skb in traffic cases |
| 39 | * use skb_sknet when call is from userland (ioctl or netlink) |
| 40 | */ |
Hans Schillstrom | a0840e2 | 2011-01-03 14:44:58 +0100 | [diff] [blame] | 41 | static inline struct net *skb_net(const struct sk_buff *skb) |
Hans Schillstrom | fc72325 | 2011-01-03 14:44:43 +0100 | [diff] [blame] | 42 | { |
| 43 | #ifdef CONFIG_NET_NS |
| 44 | #ifdef CONFIG_IP_VS_DEBUG |
| 45 | /* |
| 46 | * This is used for debug only. |
| 47 | * Start with the most likely hit |
| 48 | * End with BUG |
| 49 | */ |
| 50 | if (likely(skb->dev && skb->dev->nd_net)) |
| 51 | return dev_net(skb->dev); |
Hans Schillstrom | a09d197 | 2011-04-04 15:25:18 +0200 | [diff] [blame] | 52 | if (skb_dst(skb) && skb_dst(skb)->dev) |
Hans Schillstrom | fc72325 | 2011-01-03 14:44:43 +0100 | [diff] [blame] | 53 | return dev_net(skb_dst(skb)->dev); |
| 54 | WARN(skb->sk, "Maybe skb_sknet should be used in %s() at line:%d\n", |
| 55 | __func__, __LINE__); |
| 56 | if (likely(skb->sk && skb->sk->sk_net)) |
| 57 | return sock_net(skb->sk); |
| 58 | pr_err("There is no net ptr to find in the skb in %s() line:%d\n", |
| 59 | __func__, __LINE__); |
| 60 | BUG(); |
| 61 | #else |
| 62 | return dev_net(skb->dev ? : skb_dst(skb)->dev); |
| 63 | #endif |
| 64 | #else |
| 65 | return &init_net; |
| 66 | #endif |
| 67 | } |
| 68 | |
Hans Schillstrom | a0840e2 | 2011-01-03 14:44:58 +0100 | [diff] [blame] | 69 | static inline struct net *skb_sknet(const struct sk_buff *skb) |
Hans Schillstrom | fc72325 | 2011-01-03 14:44:43 +0100 | [diff] [blame] | 70 | { |
| 71 | #ifdef CONFIG_NET_NS |
| 72 | #ifdef CONFIG_IP_VS_DEBUG |
| 73 | /* Start with the most likely hit */ |
| 74 | if (likely(skb->sk && skb->sk->sk_net)) |
| 75 | return sock_net(skb->sk); |
| 76 | WARN(skb->dev, "Maybe skb_net should be used instead in %s() line:%d\n", |
| 77 | __func__, __LINE__); |
| 78 | if (likely(skb->dev && skb->dev->nd_net)) |
| 79 | return dev_net(skb->dev); |
| 80 | pr_err("There is no net ptr to find in the skb in %s() line:%d\n", |
| 81 | __func__, __LINE__); |
| 82 | BUG(); |
| 83 | #else |
| 84 | return sock_net(skb->sk); |
| 85 | #endif |
| 86 | #else |
| 87 | return &init_net; |
| 88 | #endif |
| 89 | } |
Hans Schillstrom | b17fc99 | 2011-01-03 14:44:56 +0100 | [diff] [blame] | 90 | /* |
| 91 | * This one needed for single_open_net since net is stored directly in |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 92 | * private not as a struct i.e. seq_file_net can't be used. |
Hans Schillstrom | b17fc99 | 2011-01-03 14:44:56 +0100 | [diff] [blame] | 93 | */ |
| 94 | static inline struct net *seq_file_single_net(struct seq_file *seq) |
| 95 | { |
| 96 | #ifdef CONFIG_NET_NS |
| 97 | return (struct net *)seq->private; |
| 98 | #else |
| 99 | return &init_net; |
| 100 | #endif |
| 101 | } |
Catalin(ux) M. BOIE | 6f7edb4 | 2010-01-05 05:50:24 +0100 | [diff] [blame] | 102 | |
| 103 | /* Connections' size value needed by ip_vs_ctl.c */ |
| 104 | extern int ip_vs_conn_tab_size; |
| 105 | |
| 106 | |
Julius Volz | 64aae3c | 2008-09-02 15:55:34 +0200 | [diff] [blame] | 107 | struct ip_vs_iphdr { |
| 108 | int len; |
| 109 | __u8 protocol; |
| 110 | union nf_inet_addr saddr; |
| 111 | union nf_inet_addr daddr; |
| 112 | }; |
| 113 | |
| 114 | static inline void |
| 115 | ip_vs_fill_iphdr(int af, const void *nh, struct ip_vs_iphdr *iphdr) |
| 116 | { |
| 117 | #ifdef CONFIG_IP_VS_IPV6 |
| 118 | if (af == AF_INET6) { |
| 119 | const struct ipv6hdr *iph = nh; |
| 120 | iphdr->len = sizeof(struct ipv6hdr); |
| 121 | iphdr->protocol = iph->nexthdr; |
| 122 | ipv6_addr_copy(&iphdr->saddr.in6, &iph->saddr); |
| 123 | ipv6_addr_copy(&iphdr->daddr.in6, &iph->daddr); |
| 124 | } else |
| 125 | #endif |
| 126 | { |
| 127 | const struct iphdr *iph = nh; |
| 128 | iphdr->len = iph->ihl * 4; |
| 129 | iphdr->protocol = iph->protocol; |
| 130 | iphdr->saddr.ip = iph->saddr; |
| 131 | iphdr->daddr.ip = iph->daddr; |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | static inline void ip_vs_addr_copy(int af, union nf_inet_addr *dst, |
| 136 | const union nf_inet_addr *src) |
| 137 | { |
| 138 | #ifdef CONFIG_IP_VS_IPV6 |
| 139 | if (af == AF_INET6) |
| 140 | ipv6_addr_copy(&dst->in6, &src->in6); |
| 141 | else |
| 142 | #endif |
| 143 | dst->ip = src->ip; |
| 144 | } |
| 145 | |
| 146 | static inline int ip_vs_addr_equal(int af, const union nf_inet_addr *a, |
| 147 | const union nf_inet_addr *b) |
| 148 | { |
| 149 | #ifdef CONFIG_IP_VS_IPV6 |
| 150 | if (af == AF_INET6) |
| 151 | return ipv6_addr_equal(&a->in6, &b->in6); |
| 152 | #endif |
| 153 | return a->ip == b->ip; |
| 154 | } |
| 155 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | #ifdef CONFIG_IP_VS_DEBUG |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 157 | #include <linux/net.h> |
| 158 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | extern int ip_vs_get_debug_level(void); |
Julius Volz | c842a3a | 2008-09-02 15:55:35 +0200 | [diff] [blame] | 160 | |
| 161 | static inline const char *ip_vs_dbg_addr(int af, char *buf, size_t buf_len, |
| 162 | const union nf_inet_addr *addr, |
| 163 | int *idx) |
| 164 | { |
| 165 | int len; |
| 166 | #ifdef CONFIG_IP_VS_IPV6 |
| 167 | if (af == AF_INET6) |
Harvey Harrison | 5b095d989 | 2008-10-29 12:52:50 -0700 | [diff] [blame] | 168 | len = snprintf(&buf[*idx], buf_len - *idx, "[%pI6]", |
Harvey Harrison | 0c6ce78 | 2008-10-28 16:09:23 -0700 | [diff] [blame] | 169 | &addr->in6) + 1; |
Julius Volz | c842a3a | 2008-09-02 15:55:35 +0200 | [diff] [blame] | 170 | else |
| 171 | #endif |
Harvey Harrison | 3685f25d | 2008-10-31 00:56:49 -0700 | [diff] [blame] | 172 | len = snprintf(&buf[*idx], buf_len - *idx, "%pI4", |
| 173 | &addr->ip) + 1; |
Julius Volz | c842a3a | 2008-09-02 15:55:35 +0200 | [diff] [blame] | 174 | |
| 175 | *idx += len; |
| 176 | BUG_ON(*idx > buf_len + 1); |
| 177 | return &buf[*idx - len]; |
| 178 | } |
| 179 | |
Hannes Eder | 9aada7a | 2009-07-30 14:29:44 -0700 | [diff] [blame] | 180 | #define IP_VS_DBG_BUF(level, msg, ...) \ |
| 181 | do { \ |
| 182 | char ip_vs_dbg_buf[160]; \ |
| 183 | int ip_vs_dbg_idx = 0; \ |
| 184 | if (level <= ip_vs_get_debug_level()) \ |
| 185 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ |
| 186 | } while (0) |
| 187 | #define IP_VS_ERR_BUF(msg...) \ |
| 188 | do { \ |
| 189 | char ip_vs_dbg_buf[160]; \ |
| 190 | int ip_vs_dbg_idx = 0; \ |
| 191 | pr_err(msg); \ |
| 192 | } while (0) |
Julius Volz | c842a3a | 2008-09-02 15:55:35 +0200 | [diff] [blame] | 193 | |
| 194 | /* Only use from within IP_VS_DBG_BUF() or IP_VS_ERR_BUF macros */ |
Hannes Eder | 9aada7a | 2009-07-30 14:29:44 -0700 | [diff] [blame] | 195 | #define IP_VS_DBG_ADDR(af, addr) \ |
| 196 | ip_vs_dbg_addr(af, ip_vs_dbg_buf, \ |
| 197 | sizeof(ip_vs_dbg_buf), addr, \ |
| 198 | &ip_vs_dbg_idx) |
Julius Volz | c842a3a | 2008-09-02 15:55:35 +0200 | [diff] [blame] | 199 | |
Hannes Eder | 9aada7a | 2009-07-30 14:29:44 -0700 | [diff] [blame] | 200 | #define IP_VS_DBG(level, msg, ...) \ |
| 201 | do { \ |
| 202 | if (level <= ip_vs_get_debug_level()) \ |
| 203 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ |
| 204 | } while (0) |
| 205 | #define IP_VS_DBG_RL(msg, ...) \ |
| 206 | do { \ |
| 207 | if (net_ratelimit()) \ |
| 208 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ |
| 209 | } while (0) |
Julian Anastasov | 0d79641 | 2010-10-17 16:46:17 +0300 | [diff] [blame] | 210 | #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) \ |
Hannes Eder | 9aada7a | 2009-07-30 14:29:44 -0700 | [diff] [blame] | 211 | do { \ |
| 212 | if (level <= ip_vs_get_debug_level()) \ |
Julian Anastasov | 0d79641 | 2010-10-17 16:46:17 +0300 | [diff] [blame] | 213 | pp->debug_packet(af, pp, skb, ofs, msg); \ |
Hannes Eder | 9aada7a | 2009-07-30 14:29:44 -0700 | [diff] [blame] | 214 | } while (0) |
Julian Anastasov | 0d79641 | 2010-10-17 16:46:17 +0300 | [diff] [blame] | 215 | #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) \ |
Hannes Eder | 9aada7a | 2009-07-30 14:29:44 -0700 | [diff] [blame] | 216 | do { \ |
| 217 | if (level <= ip_vs_get_debug_level() && \ |
| 218 | net_ratelimit()) \ |
Julian Anastasov | 0d79641 | 2010-10-17 16:46:17 +0300 | [diff] [blame] | 219 | pp->debug_packet(af, pp, skb, ofs, msg); \ |
Hannes Eder | 9aada7a | 2009-07-30 14:29:44 -0700 | [diff] [blame] | 220 | } while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | #else /* NO DEBUGGING at ALL */ |
Julius Volz | c842a3a | 2008-09-02 15:55:35 +0200 | [diff] [blame] | 222 | #define IP_VS_DBG_BUF(level, msg...) do {} while (0) |
| 223 | #define IP_VS_ERR_BUF(msg...) do {} while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | #define IP_VS_DBG(level, msg...) do {} while (0) |
| 225 | #define IP_VS_DBG_RL(msg...) do {} while (0) |
Julian Anastasov | 0d79641 | 2010-10-17 16:46:17 +0300 | [diff] [blame] | 226 | #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) do {} while (0) |
| 227 | #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) do {} while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | #endif |
| 229 | |
| 230 | #define IP_VS_BUG() BUG() |
Hannes Eder | 1e3e238 | 2009-08-02 11:05:41 +0000 | [diff] [blame] | 231 | #define IP_VS_ERR_RL(msg, ...) \ |
Hannes Eder | 9aada7a | 2009-07-30 14:29:44 -0700 | [diff] [blame] | 232 | do { \ |
| 233 | if (net_ratelimit()) \ |
Hannes Eder | 1e3e238 | 2009-08-02 11:05:41 +0000 | [diff] [blame] | 234 | pr_err(msg, ##__VA_ARGS__); \ |
Hannes Eder | 9aada7a | 2009-07-30 14:29:44 -0700 | [diff] [blame] | 235 | } while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | |
| 237 | #ifdef CONFIG_IP_VS_DEBUG |
| 238 | #define EnterFunction(level) \ |
Hannes Eder | 9aada7a | 2009-07-30 14:29:44 -0700 | [diff] [blame] | 239 | do { \ |
| 240 | if (level <= ip_vs_get_debug_level()) \ |
| 241 | printk(KERN_DEBUG \ |
| 242 | pr_fmt("Enter: %s, %s line %i\n"), \ |
| 243 | __func__, __FILE__, __LINE__); \ |
| 244 | } while (0) |
| 245 | #define LeaveFunction(level) \ |
| 246 | do { \ |
| 247 | if (level <= ip_vs_get_debug_level()) \ |
| 248 | printk(KERN_DEBUG \ |
| 249 | pr_fmt("Leave: %s, %s line %i\n"), \ |
| 250 | __func__, __FILE__, __LINE__); \ |
| 251 | } while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | #else |
| 253 | #define EnterFunction(level) do {} while (0) |
| 254 | #define LeaveFunction(level) do {} while (0) |
| 255 | #endif |
| 256 | |
| 257 | #define IP_VS_WAIT_WHILE(expr) while (expr) { cpu_relax(); } |
| 258 | |
| 259 | |
| 260 | /* |
| 261 | * The port number of FTP service (in network order). |
| 262 | */ |
Harvey Harrison | f3a7c66 | 2009-02-14 22:58:35 -0800 | [diff] [blame] | 263 | #define FTPPORT cpu_to_be16(21) |
| 264 | #define FTPDATA cpu_to_be16(20) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | |
| 266 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | * TCP State Values |
| 268 | */ |
| 269 | enum { |
| 270 | IP_VS_TCP_S_NONE = 0, |
| 271 | IP_VS_TCP_S_ESTABLISHED, |
| 272 | IP_VS_TCP_S_SYN_SENT, |
| 273 | IP_VS_TCP_S_SYN_RECV, |
| 274 | IP_VS_TCP_S_FIN_WAIT, |
| 275 | IP_VS_TCP_S_TIME_WAIT, |
| 276 | IP_VS_TCP_S_CLOSE, |
| 277 | IP_VS_TCP_S_CLOSE_WAIT, |
| 278 | IP_VS_TCP_S_LAST_ACK, |
| 279 | IP_VS_TCP_S_LISTEN, |
| 280 | IP_VS_TCP_S_SYNACK, |
| 281 | IP_VS_TCP_S_LAST |
| 282 | }; |
| 283 | |
| 284 | /* |
| 285 | * UDP State Values |
| 286 | */ |
| 287 | enum { |
| 288 | IP_VS_UDP_S_NORMAL, |
| 289 | IP_VS_UDP_S_LAST, |
| 290 | }; |
| 291 | |
| 292 | /* |
| 293 | * ICMP State Values |
| 294 | */ |
| 295 | enum { |
| 296 | IP_VS_ICMP_S_NORMAL, |
| 297 | IP_VS_ICMP_S_LAST, |
| 298 | }; |
| 299 | |
| 300 | /* |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 301 | * SCTP State Values |
| 302 | */ |
| 303 | enum ip_vs_sctp_states { |
| 304 | IP_VS_SCTP_S_NONE, |
| 305 | IP_VS_SCTP_S_INIT_CLI, |
| 306 | IP_VS_SCTP_S_INIT_SER, |
| 307 | IP_VS_SCTP_S_INIT_ACK_CLI, |
| 308 | IP_VS_SCTP_S_INIT_ACK_SER, |
| 309 | IP_VS_SCTP_S_ECHO_CLI, |
| 310 | IP_VS_SCTP_S_ECHO_SER, |
| 311 | IP_VS_SCTP_S_ESTABLISHED, |
| 312 | IP_VS_SCTP_S_SHUT_CLI, |
| 313 | IP_VS_SCTP_S_SHUT_SER, |
| 314 | IP_VS_SCTP_S_SHUT_ACK_CLI, |
| 315 | IP_VS_SCTP_S_SHUT_ACK_SER, |
| 316 | IP_VS_SCTP_S_CLOSED, |
| 317 | IP_VS_SCTP_S_LAST |
| 318 | }; |
| 319 | |
| 320 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | * Delta sequence info structure |
| 322 | * Each ip_vs_conn has 2 (output AND input seq. changes). |
| 323 | * Only used in the VS/NAT. |
| 324 | */ |
| 325 | struct ip_vs_seq { |
| 326 | __u32 init_seq; /* Add delta from this seq */ |
| 327 | __u32 delta; /* Delta in sequence numbers */ |
| 328 | __u32 previous_delta; /* Delta in sequence numbers |
| 329 | before last resized pkt */ |
| 330 | }; |
| 331 | |
Hans Schillstrom | b17fc99 | 2011-01-03 14:44:56 +0100 | [diff] [blame] | 332 | /* |
| 333 | * counters per cpu |
| 334 | */ |
| 335 | struct ip_vs_counters { |
| 336 | __u32 conns; /* connections scheduled */ |
| 337 | __u32 inpkts; /* incoming packets */ |
| 338 | __u32 outpkts; /* outgoing packets */ |
| 339 | __u64 inbytes; /* incoming bytes */ |
| 340 | __u64 outbytes; /* outgoing bytes */ |
| 341 | }; |
| 342 | /* |
| 343 | * Stats per cpu |
| 344 | */ |
| 345 | struct ip_vs_cpu_stats { |
| 346 | struct ip_vs_counters ustats; |
| 347 | struct u64_stats_sync syncp; |
| 348 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | |
| 350 | /* |
Sven Wegener | 3a14a313 | 2008-08-10 18:24:41 +0000 | [diff] [blame] | 351 | * IPVS statistics objects |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | */ |
Sven Wegener | 3a14a313 | 2008-08-10 18:24:41 +0000 | [diff] [blame] | 353 | struct ip_vs_estimator { |
| 354 | struct list_head list; |
| 355 | |
| 356 | u64 last_inbytes; |
| 357 | u64 last_outbytes; |
| 358 | u32 last_conns; |
| 359 | u32 last_inpkts; |
| 360 | u32 last_outpkts; |
| 361 | |
| 362 | u32 cps; |
| 363 | u32 inpps; |
| 364 | u32 outpps; |
| 365 | u32 inbps; |
| 366 | u32 outbps; |
| 367 | }; |
| 368 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 369 | struct ip_vs_stats { |
Hans Schillstrom | b17fc99 | 2011-01-03 14:44:56 +0100 | [diff] [blame] | 370 | struct ip_vs_stats_user ustats; /* statistics */ |
Sven Wegener | e9c0ce2 | 2008-09-08 13:39:04 +0200 | [diff] [blame] | 371 | struct ip_vs_estimator est; /* estimator */ |
Hans Schillstrom | b17fc99 | 2011-01-03 14:44:56 +0100 | [diff] [blame] | 372 | struct ip_vs_cpu_stats *cpustats; /* per cpu counters */ |
| 373 | spinlock_t lock; /* spin lock */ |
Julian Anastasov | 55a3d4e | 2011-03-14 01:37:49 +0200 | [diff] [blame] | 374 | struct ip_vs_stats_user ustats0; /* reset values */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | }; |
| 376 | |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 377 | struct dst_entry; |
| 378 | struct iphdr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | struct ip_vs_conn; |
| 380 | struct ip_vs_app; |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 381 | struct sk_buff; |
Hans Schillstrom | 252c641 | 2011-01-03 14:44:46 +0100 | [diff] [blame] | 382 | struct ip_vs_proto_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | |
| 384 | struct ip_vs_protocol { |
| 385 | struct ip_vs_protocol *next; |
| 386 | char *name; |
Julian Anastasov | 2ad17de | 2008-04-29 03:21:23 -0700 | [diff] [blame] | 387 | u16 protocol; |
| 388 | u16 num_states; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | int dont_defrag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | |
| 391 | void (*init)(struct ip_vs_protocol *pp); |
| 392 | |
| 393 | void (*exit)(struct ip_vs_protocol *pp); |
| 394 | |
Hans Schillstrom | 252c641 | 2011-01-03 14:44:46 +0100 | [diff] [blame] | 395 | void (*init_netns)(struct net *net, struct ip_vs_proto_data *pd); |
| 396 | |
| 397 | void (*exit_netns)(struct net *net, struct ip_vs_proto_data *pd); |
| 398 | |
Julius Volz | 51ef348 | 2008-09-02 15:55:40 +0200 | [diff] [blame] | 399 | int (*conn_schedule)(int af, struct sk_buff *skb, |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 400 | struct ip_vs_proto_data *pd, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | int *verdict, struct ip_vs_conn **cpp); |
| 402 | |
| 403 | struct ip_vs_conn * |
Julius Volz | 51ef348 | 2008-09-02 15:55:40 +0200 | [diff] [blame] | 404 | (*conn_in_get)(int af, |
| 405 | const struct sk_buff *skb, |
Julius Volz | 51ef348 | 2008-09-02 15:55:40 +0200 | [diff] [blame] | 406 | const struct ip_vs_iphdr *iph, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | unsigned int proto_off, |
| 408 | int inverse); |
| 409 | |
| 410 | struct ip_vs_conn * |
Julius Volz | 51ef348 | 2008-09-02 15:55:40 +0200 | [diff] [blame] | 411 | (*conn_out_get)(int af, |
| 412 | const struct sk_buff *skb, |
Julius Volz | 51ef348 | 2008-09-02 15:55:40 +0200 | [diff] [blame] | 413 | const struct ip_vs_iphdr *iph, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | unsigned int proto_off, |
| 415 | int inverse); |
| 416 | |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 417 | int (*snat_handler)(struct sk_buff *skb, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | struct ip_vs_protocol *pp, struct ip_vs_conn *cp); |
| 419 | |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 420 | int (*dnat_handler)(struct sk_buff *skb, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | struct ip_vs_protocol *pp, struct ip_vs_conn *cp); |
| 422 | |
Julius Volz | 51ef348 | 2008-09-02 15:55:40 +0200 | [diff] [blame] | 423 | int (*csum_check)(int af, struct sk_buff *skb, |
| 424 | struct ip_vs_protocol *pp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | |
| 426 | const char *(*state_name)(int state); |
| 427 | |
| 428 | int (*state_transition)(struct ip_vs_conn *cp, int direction, |
| 429 | const struct sk_buff *skb, |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 430 | struct ip_vs_proto_data *pd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | |
Hans Schillstrom | ab8a5e8 | 2011-01-03 14:44:53 +0100 | [diff] [blame] | 432 | int (*register_app)(struct net *net, struct ip_vs_app *inc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | |
Hans Schillstrom | ab8a5e8 | 2011-01-03 14:44:53 +0100 | [diff] [blame] | 434 | void (*unregister_app)(struct net *net, struct ip_vs_app *inc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | |
| 436 | int (*app_conn_bind)(struct ip_vs_conn *cp); |
| 437 | |
Julian Anastasov | 0d79641 | 2010-10-17 16:46:17 +0300 | [diff] [blame] | 438 | void (*debug_packet)(int af, struct ip_vs_protocol *pp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | const struct sk_buff *skb, |
| 440 | int offset, |
| 441 | const char *msg); |
| 442 | |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 443 | void (*timeout_change)(struct ip_vs_proto_data *pd, int flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | }; |
| 445 | |
Hans Schillstrom | 252c641 | 2011-01-03 14:44:46 +0100 | [diff] [blame] | 446 | /* |
| 447 | * protocol data per netns |
| 448 | */ |
| 449 | struct ip_vs_proto_data { |
| 450 | struct ip_vs_proto_data *next; |
| 451 | struct ip_vs_protocol *pp; |
| 452 | int *timeout_table; /* protocol timeout table */ |
| 453 | atomic_t appcnt; /* counter of proto app incs. */ |
| 454 | struct tcp_states_t *tcp_state_table; |
| 455 | }; |
| 456 | |
| 457 | extern struct ip_vs_protocol *ip_vs_proto_get(unsigned short proto); |
| 458 | extern struct ip_vs_proto_data *ip_vs_proto_data_get(struct net *net, |
| 459 | unsigned short proto); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | |
Simon Horman | f11017e | 2010-08-22 21:37:52 +0900 | [diff] [blame] | 461 | struct ip_vs_conn_param { |
Hans Schillstrom | 6e67e58 | 2011-01-03 14:44:57 +0100 | [diff] [blame] | 462 | struct net *net; |
Simon Horman | f11017e | 2010-08-22 21:37:52 +0900 | [diff] [blame] | 463 | const union nf_inet_addr *caddr; |
| 464 | const union nf_inet_addr *vaddr; |
| 465 | __be16 cport; |
| 466 | __be16 vport; |
| 467 | __u16 protocol; |
| 468 | u16 af; |
Simon Horman | 8599928 | 2010-08-22 21:37:53 +0900 | [diff] [blame] | 469 | |
| 470 | const struct ip_vs_pe *pe; |
| 471 | char *pe_data; |
| 472 | __u8 pe_data_len; |
Simon Horman | f11017e | 2010-08-22 21:37:52 +0900 | [diff] [blame] | 473 | }; |
| 474 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | /* |
| 476 | * IP_VS structure allocated for each dynamically scheduled connection |
| 477 | */ |
| 478 | struct ip_vs_conn { |
Changli Gao | 731109e | 2011-02-19 18:05:08 +0800 | [diff] [blame] | 479 | struct hlist_node c_list; /* hashed list heads */ |
Hans Schillstrom | 6e67e58 | 2011-01-03 14:44:57 +0100 | [diff] [blame] | 480 | #ifdef CONFIG_NET_NS |
| 481 | struct net *net; /* Name space */ |
| 482 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | /* Protocol, addresses and port numbers */ |
Hans Schillstrom | 6e67e58 | 2011-01-03 14:44:57 +0100 | [diff] [blame] | 484 | u16 af; /* address family */ |
| 485 | __be16 cport; |
| 486 | __be16 vport; |
| 487 | __be16 dport; |
| 488 | __u32 fwmark; /* Fire wall mark from skb */ |
| 489 | union nf_inet_addr caddr; /* client address */ |
| 490 | union nf_inet_addr vaddr; /* virtual address */ |
| 491 | union nf_inet_addr daddr; /* destination address */ |
| 492 | volatile __u32 flags; /* status flags */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | __u16 protocol; /* Which protocol (TCP/UDP) */ |
| 494 | |
| 495 | /* counter and timer */ |
| 496 | atomic_t refcnt; /* reference count */ |
| 497 | struct timer_list timer; /* Expiration timer */ |
| 498 | volatile unsigned long timeout; /* timeout */ |
| 499 | |
| 500 | /* Flags and state transition */ |
| 501 | spinlock_t lock; /* lock for state transition */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | volatile __u16 state; /* state info */ |
Rumen G. Bogdanovski | efac527 | 2007-11-07 02:36:55 -0800 | [diff] [blame] | 503 | volatile __u16 old_state; /* old state, to be used for |
| 504 | * state transition triggerd |
| 505 | * synchronization |
| 506 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | |
| 508 | /* Control members */ |
| 509 | struct ip_vs_conn *control; /* Master control connection */ |
| 510 | atomic_t n_control; /* Number of controlled ones */ |
| 511 | struct ip_vs_dest *dest; /* real server */ |
| 512 | atomic_t in_pkts; /* incoming packet counter */ |
| 513 | |
| 514 | /* packet transmitter for different forwarding methods. If it |
| 515 | mangles the packet, it must return NF_DROP or better NF_STOLEN, |
| 516 | otherwise this must be changed to a sk_buff **. |
Julian Anastasov | fc60476 | 2010-10-17 16:38:15 +0300 | [diff] [blame] | 517 | NF_ACCEPT can be returned when destination is local. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | */ |
| 519 | int (*packet_xmit)(struct sk_buff *skb, struct ip_vs_conn *cp, |
| 520 | struct ip_vs_protocol *pp); |
| 521 | |
| 522 | /* Note: we can group the following members into a structure, |
| 523 | in order to save more space, and the following members are |
| 524 | only used in VS/NAT anyway */ |
| 525 | struct ip_vs_app *app; /* bound ip_vs_app object */ |
| 526 | void *app_data; /* Application private data */ |
| 527 | struct ip_vs_seq in_seq; /* incoming seq. struct */ |
| 528 | struct ip_vs_seq out_seq; /* outgoing seq. struct */ |
Simon Horman | 8599928 | 2010-08-22 21:37:53 +0900 | [diff] [blame] | 529 | |
Simon Horman | e9e5eee | 2010-11-08 20:05:57 +0900 | [diff] [blame] | 530 | const struct ip_vs_pe *pe; |
Simon Horman | 8599928 | 2010-08-22 21:37:53 +0900 | [diff] [blame] | 531 | char *pe_data; |
| 532 | __u8 pe_data_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | }; |
| 534 | |
Hans Schillstrom | 6e67e58 | 2011-01-03 14:44:57 +0100 | [diff] [blame] | 535 | /* |
| 536 | * To save some memory in conn table when name space is disabled. |
| 537 | */ |
| 538 | static inline struct net *ip_vs_conn_net(const struct ip_vs_conn *cp) |
| 539 | { |
| 540 | #ifdef CONFIG_NET_NS |
| 541 | return cp->net; |
| 542 | #else |
| 543 | return &init_net; |
| 544 | #endif |
| 545 | } |
| 546 | static inline void ip_vs_conn_net_set(struct ip_vs_conn *cp, struct net *net) |
| 547 | { |
| 548 | #ifdef CONFIG_NET_NS |
| 549 | cp->net = net; |
| 550 | #endif |
| 551 | } |
| 552 | |
| 553 | static inline int ip_vs_conn_net_eq(const struct ip_vs_conn *cp, |
| 554 | struct net *net) |
| 555 | { |
| 556 | #ifdef CONFIG_NET_NS |
| 557 | return cp->net == net; |
| 558 | #else |
| 559 | return 1; |
| 560 | #endif |
| 561 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | |
| 563 | /* |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 564 | * Extended internal versions of struct ip_vs_service_user and |
| 565 | * ip_vs_dest_user for IPv6 support. |
| 566 | * |
| 567 | * We need these to conveniently pass around service and destination |
| 568 | * options, but unfortunately, we also need to keep the old definitions to |
| 569 | * maintain userspace backwards compatibility for the setsockopt interface. |
| 570 | */ |
| 571 | struct ip_vs_service_user_kern { |
| 572 | /* virtual service addresses */ |
| 573 | u16 af; |
| 574 | u16 protocol; |
| 575 | union nf_inet_addr addr; /* virtual ip address */ |
| 576 | u16 port; |
| 577 | u32 fwmark; /* firwall mark of service */ |
| 578 | |
| 579 | /* virtual service options */ |
| 580 | char *sched_name; |
Simon Horman | 0d1e71b | 2010-08-22 21:37:54 +0900 | [diff] [blame] | 581 | char *pe_name; |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 582 | unsigned flags; /* virtual service flags */ |
| 583 | unsigned timeout; /* persistent timeout in sec */ |
| 584 | u32 netmask; /* persistent netmask */ |
| 585 | }; |
| 586 | |
| 587 | |
| 588 | struct ip_vs_dest_user_kern { |
| 589 | /* destination server address */ |
| 590 | union nf_inet_addr addr; |
| 591 | u16 port; |
| 592 | |
| 593 | /* real server options */ |
| 594 | unsigned conn_flags; /* connection flags */ |
| 595 | int weight; /* destination weight */ |
| 596 | |
| 597 | /* thresholds for active connections */ |
| 598 | u32 u_threshold; /* upper threshold */ |
| 599 | u32 l_threshold; /* lower threshold */ |
| 600 | }; |
| 601 | |
| 602 | |
| 603 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | * The information about the virtual service offered to the net |
| 605 | * and the forwarding entries |
| 606 | */ |
| 607 | struct ip_vs_service { |
| 608 | struct list_head s_list; /* for normal service table */ |
| 609 | struct list_head f_list; /* for fwmark-based service table */ |
| 610 | atomic_t refcnt; /* reference counter */ |
| 611 | atomic_t usecnt; /* use counter */ |
| 612 | |
Julius Volz | e7ade46 | 2008-09-02 15:55:33 +0200 | [diff] [blame] | 613 | u16 af; /* address family */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | __u16 protocol; /* which protocol (TCP/UDP) */ |
Julius Volz | e7ade46 | 2008-09-02 15:55:33 +0200 | [diff] [blame] | 615 | union nf_inet_addr addr; /* IP address for virtual service */ |
Al Viro | 014d730 | 2006-09-28 14:29:52 -0700 | [diff] [blame] | 616 | __be16 port; /* port number for the service */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | __u32 fwmark; /* firewall mark of the service */ |
| 618 | unsigned flags; /* service status flags */ |
| 619 | unsigned timeout; /* persistent timeout in ticks */ |
Al Viro | 014d730 | 2006-09-28 14:29:52 -0700 | [diff] [blame] | 620 | __be32 netmask; /* grouping granularity */ |
Hans Schillstrom | fc72325 | 2011-01-03 14:44:43 +0100 | [diff] [blame] | 621 | struct net *net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | |
| 623 | struct list_head destinations; /* real server d-linked list */ |
| 624 | __u32 num_dests; /* number of servers */ |
| 625 | struct ip_vs_stats stats; /* statistics for the service */ |
| 626 | struct ip_vs_app *inc; /* bind conns to this app inc */ |
| 627 | |
| 628 | /* for scheduling */ |
| 629 | struct ip_vs_scheduler *scheduler; /* bound scheduler object */ |
| 630 | rwlock_t sched_lock; /* lock sched_data */ |
| 631 | void *sched_data; /* scheduler application data */ |
Simon Horman | 8599928 | 2010-08-22 21:37:53 +0900 | [diff] [blame] | 632 | |
| 633 | /* alternate persistence engine */ |
| 634 | struct ip_vs_pe *pe; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | }; |
| 636 | |
| 637 | |
| 638 | /* |
| 639 | * The real server destination forwarding entry |
| 640 | * with ip address, port number, and so on. |
| 641 | */ |
| 642 | struct ip_vs_dest { |
| 643 | struct list_head n_list; /* for the dests in the service */ |
| 644 | struct list_head d_list; /* for table with all the dests */ |
| 645 | |
Julius Volz | e7ade46 | 2008-09-02 15:55:33 +0200 | [diff] [blame] | 646 | u16 af; /* address family */ |
Al Viro | 014d730 | 2006-09-28 14:29:52 -0700 | [diff] [blame] | 647 | __be16 port; /* port number of the server */ |
Hans Schillstrom | f2431e6 | 2011-01-03 14:45:00 +0100 | [diff] [blame] | 648 | union nf_inet_addr addr; /* IP address of the server */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | volatile unsigned flags; /* dest status flags */ |
| 650 | atomic_t conn_flags; /* flags to copy to conn */ |
| 651 | atomic_t weight; /* server weight */ |
| 652 | |
| 653 | atomic_t refcnt; /* reference counter */ |
| 654 | struct ip_vs_stats stats; /* statistics */ |
| 655 | |
| 656 | /* connection counters and thresholds */ |
| 657 | atomic_t activeconns; /* active connections */ |
| 658 | atomic_t inactconns; /* inactive connections */ |
| 659 | atomic_t persistconns; /* persistent connections */ |
| 660 | __u32 u_threshold; /* upper threshold */ |
| 661 | __u32 l_threshold; /* lower threshold */ |
| 662 | |
| 663 | /* for destination cache */ |
| 664 | spinlock_t dst_lock; /* lock of dst_cache */ |
| 665 | struct dst_entry *dst_cache; /* destination cache entry */ |
| 666 | u32 dst_rtos; /* RT_TOS(tos) for dst */ |
Hans Schillstrom | 714f095 | 2010-10-19 10:38:48 +0200 | [diff] [blame] | 667 | u32 dst_cookie; |
Julian Anastasov | c92f5ca | 2011-05-10 12:46:05 +0000 | [diff] [blame] | 668 | union nf_inet_addr dst_saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | |
| 670 | /* for virtual service */ |
| 671 | struct ip_vs_service *svc; /* service it belongs to */ |
| 672 | __u16 protocol; /* which protocol (TCP/UDP) */ |
Al Viro | 014d730 | 2006-09-28 14:29:52 -0700 | [diff] [blame] | 673 | __be16 vport; /* virtual port number */ |
Hans Schillstrom | f2431e6 | 2011-01-03 14:45:00 +0100 | [diff] [blame] | 674 | union nf_inet_addr vaddr; /* virtual IP address */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | __u32 vfwmark; /* firewall mark of service */ |
| 676 | }; |
| 677 | |
| 678 | |
| 679 | /* |
| 680 | * The scheduler object |
| 681 | */ |
| 682 | struct ip_vs_scheduler { |
| 683 | struct list_head n_list; /* d-linked list head */ |
| 684 | char *name; /* scheduler name */ |
| 685 | atomic_t refcnt; /* reference counter */ |
| 686 | struct module *module; /* THIS_MODULE/NULL */ |
| 687 | |
| 688 | /* scheduler initializing service */ |
| 689 | int (*init_service)(struct ip_vs_service *svc); |
| 690 | /* scheduling service finish */ |
| 691 | int (*done_service)(struct ip_vs_service *svc); |
| 692 | /* scheduler updating service */ |
| 693 | int (*update_service)(struct ip_vs_service *svc); |
| 694 | |
| 695 | /* selecting a server from the given service */ |
| 696 | struct ip_vs_dest* (*schedule)(struct ip_vs_service *svc, |
| 697 | const struct sk_buff *skb); |
| 698 | }; |
| 699 | |
Simon Horman | 8599928 | 2010-08-22 21:37:53 +0900 | [diff] [blame] | 700 | /* The persistence engine object */ |
| 701 | struct ip_vs_pe { |
| 702 | struct list_head n_list; /* d-linked list head */ |
| 703 | char *name; /* scheduler name */ |
| 704 | atomic_t refcnt; /* reference counter */ |
| 705 | struct module *module; /* THIS_MODULE/NULL */ |
| 706 | |
| 707 | /* get the connection template, if any */ |
| 708 | int (*fill_param)(struct ip_vs_conn_param *p, struct sk_buff *skb); |
| 709 | bool (*ct_match)(const struct ip_vs_conn_param *p, |
| 710 | struct ip_vs_conn *ct); |
| 711 | u32 (*hashkey_raw)(const struct ip_vs_conn_param *p, u32 initval, |
| 712 | bool inverse); |
Simon Horman | a3c918a | 2010-08-22 21:37:53 +0900 | [diff] [blame] | 713 | int (*show_pe_data)(const struct ip_vs_conn *cp, char *buf); |
Simon Horman | 8599928 | 2010-08-22 21:37:53 +0900 | [diff] [blame] | 714 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | |
| 716 | /* |
| 717 | * The application module object (a.k.a. app incarnation) |
| 718 | */ |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 719 | struct ip_vs_app { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | struct list_head a_list; /* member in app list */ |
| 721 | int type; /* IP_VS_APP_TYPE_xxx */ |
| 722 | char *name; /* application module name */ |
| 723 | __u16 protocol; |
| 724 | struct module *module; /* THIS_MODULE/NULL */ |
| 725 | struct list_head incs_list; /* list of incarnations */ |
| 726 | |
| 727 | /* members for application incarnations */ |
| 728 | struct list_head p_list; /* member in proto app list */ |
| 729 | struct ip_vs_app *app; /* its real application */ |
Al Viro | 014d730 | 2006-09-28 14:29:52 -0700 | [diff] [blame] | 730 | __be16 port; /* port number in net order */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | atomic_t usecnt; /* usage counter */ |
| 732 | |
Julian Anastasov | 8b27b10 | 2010-10-17 16:17:20 +0300 | [diff] [blame] | 733 | /* |
| 734 | * output hook: Process packet in inout direction, diff set for TCP. |
| 735 | * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, |
| 736 | * 2=Mangled but checksum was not updated |
| 737 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | int (*pkt_out)(struct ip_vs_app *, struct ip_vs_conn *, |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 739 | struct sk_buff *, int *diff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | |
Julian Anastasov | 8b27b10 | 2010-10-17 16:17:20 +0300 | [diff] [blame] | 741 | /* |
| 742 | * input hook: Process packet in outin direction, diff set for TCP. |
| 743 | * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, |
| 744 | * 2=Mangled but checksum was not updated |
| 745 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | int (*pkt_in)(struct ip_vs_app *, struct ip_vs_conn *, |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 747 | struct sk_buff *, int *diff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | |
| 749 | /* ip_vs_app initializer */ |
| 750 | int (*init_conn)(struct ip_vs_app *, struct ip_vs_conn *); |
| 751 | |
| 752 | /* ip_vs_app finish */ |
| 753 | int (*done_conn)(struct ip_vs_app *, struct ip_vs_conn *); |
| 754 | |
| 755 | |
| 756 | /* not used now */ |
| 757 | int (*bind_conn)(struct ip_vs_app *, struct ip_vs_conn *, |
| 758 | struct ip_vs_protocol *); |
| 759 | |
| 760 | void (*unbind_conn)(struct ip_vs_app *, struct ip_vs_conn *); |
| 761 | |
| 762 | int * timeout_table; |
| 763 | int * timeouts; |
| 764 | int timeouts_size; |
| 765 | |
| 766 | int (*conn_schedule)(struct sk_buff *skb, struct ip_vs_app *app, |
| 767 | int *verdict, struct ip_vs_conn **cpp); |
| 768 | |
| 769 | struct ip_vs_conn * |
| 770 | (*conn_in_get)(const struct sk_buff *skb, struct ip_vs_app *app, |
| 771 | const struct iphdr *iph, unsigned int proto_off, |
| 772 | int inverse); |
| 773 | |
| 774 | struct ip_vs_conn * |
| 775 | (*conn_out_get)(const struct sk_buff *skb, struct ip_vs_app *app, |
| 776 | const struct iphdr *iph, unsigned int proto_off, |
| 777 | int inverse); |
| 778 | |
| 779 | int (*state_transition)(struct ip_vs_conn *cp, int direction, |
| 780 | const struct sk_buff *skb, |
| 781 | struct ip_vs_app *app); |
| 782 | |
| 783 | void (*timeout_change)(struct ip_vs_app *app, int flags); |
| 784 | }; |
| 785 | |
Julian Anastasov | 2553d06 | 2011-03-04 12:18:07 +0200 | [diff] [blame] | 786 | /* IPVS in network namespace */ |
| 787 | struct netns_ipvs { |
| 788 | int gen; /* Generation */ |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 789 | int enable; /* enable like nf_hooks do */ |
Julian Anastasov | 2553d06 | 2011-03-04 12:18:07 +0200 | [diff] [blame] | 790 | /* |
| 791 | * Hash table: for real service lookups |
| 792 | */ |
| 793 | #define IP_VS_RTAB_BITS 4 |
| 794 | #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS) |
| 795 | #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1) |
| 796 | |
| 797 | struct list_head rs_table[IP_VS_RTAB_SIZE]; |
| 798 | /* ip_vs_app */ |
| 799 | struct list_head app_list; |
Hans Schillstrom | c74c0bf | 2011-05-24 14:11:05 +0200 | [diff] [blame] | 800 | /* ip_vs_ftp */ |
| 801 | struct ip_vs_app *ftp_app; |
Julian Anastasov | 2553d06 | 2011-03-04 12:18:07 +0200 | [diff] [blame] | 802 | /* ip_vs_proto */ |
| 803 | #define IP_VS_PROTO_TAB_SIZE 32 /* must be power of 2 */ |
| 804 | struct ip_vs_proto_data *proto_data_table[IP_VS_PROTO_TAB_SIZE]; |
| 805 | /* ip_vs_proto_tcp */ |
| 806 | #ifdef CONFIG_IP_VS_PROTO_TCP |
| 807 | #define TCP_APP_TAB_BITS 4 |
| 808 | #define TCP_APP_TAB_SIZE (1 << TCP_APP_TAB_BITS) |
| 809 | #define TCP_APP_TAB_MASK (TCP_APP_TAB_SIZE - 1) |
| 810 | struct list_head tcp_apps[TCP_APP_TAB_SIZE]; |
| 811 | spinlock_t tcp_app_lock; |
| 812 | #endif |
| 813 | /* ip_vs_proto_udp */ |
| 814 | #ifdef CONFIG_IP_VS_PROTO_UDP |
| 815 | #define UDP_APP_TAB_BITS 4 |
| 816 | #define UDP_APP_TAB_SIZE (1 << UDP_APP_TAB_BITS) |
| 817 | #define UDP_APP_TAB_MASK (UDP_APP_TAB_SIZE - 1) |
| 818 | struct list_head udp_apps[UDP_APP_TAB_SIZE]; |
| 819 | spinlock_t udp_app_lock; |
| 820 | #endif |
| 821 | /* ip_vs_proto_sctp */ |
| 822 | #ifdef CONFIG_IP_VS_PROTO_SCTP |
| 823 | #define SCTP_APP_TAB_BITS 4 |
| 824 | #define SCTP_APP_TAB_SIZE (1 << SCTP_APP_TAB_BITS) |
| 825 | #define SCTP_APP_TAB_MASK (SCTP_APP_TAB_SIZE - 1) |
| 826 | /* Hash table for SCTP application incarnations */ |
| 827 | struct list_head sctp_apps[SCTP_APP_TAB_SIZE]; |
| 828 | spinlock_t sctp_app_lock; |
| 829 | #endif |
| 830 | /* ip_vs_conn */ |
| 831 | atomic_t conn_count; /* connection counter */ |
| 832 | |
| 833 | /* ip_vs_ctl */ |
Julian Anastasov | 2a0751a | 2011-03-04 12:20:35 +0200 | [diff] [blame] | 834 | struct ip_vs_stats tot_stats; /* Statistics & est. */ |
Julian Anastasov | 2553d06 | 2011-03-04 12:18:07 +0200 | [diff] [blame] | 835 | |
| 836 | int num_services; /* no of virtual services */ |
Simon Horman | f2247fb | 2011-02-04 18:33:02 +0900 | [diff] [blame] | 837 | |
Julian Anastasov | 2553d06 | 2011-03-04 12:18:07 +0200 | [diff] [blame] | 838 | rwlock_t rs_lock; /* real services table */ |
Julian Anastasov | 2553d06 | 2011-03-04 12:18:07 +0200 | [diff] [blame] | 839 | /* Trash for destinations */ |
| 840 | struct list_head dest_trash; |
| 841 | /* Service counters */ |
| 842 | atomic_t ftpsvc_counter; |
| 843 | atomic_t nullsvc_counter; |
| 844 | |
Simon Horman | f2247fb | 2011-02-04 18:33:02 +0900 | [diff] [blame] | 845 | #ifdef CONFIG_SYSCTL |
| 846 | /* 1/rate drop and drop-entry variables */ |
| 847 | struct delayed_work defense_work; /* Work handler */ |
| 848 | int drop_rate; |
| 849 | int drop_counter; |
| 850 | atomic_t dropentry; |
| 851 | /* locks in ctl.c */ |
| 852 | spinlock_t dropentry_lock; /* drop entry handling */ |
| 853 | spinlock_t droppacket_lock; /* drop packet handling */ |
| 854 | spinlock_t securetcp_lock; /* state and timeout tables */ |
| 855 | |
Julian Anastasov | 2553d06 | 2011-03-04 12:18:07 +0200 | [diff] [blame] | 856 | /* sys-ctl struct */ |
| 857 | struct ctl_table_header *sysctl_hdr; |
| 858 | struct ctl_table *sysctl_tbl; |
Simon Horman | f2247fb | 2011-02-04 18:33:02 +0900 | [diff] [blame] | 859 | #endif |
| 860 | |
Julian Anastasov | 2553d06 | 2011-03-04 12:18:07 +0200 | [diff] [blame] | 861 | /* sysctl variables */ |
| 862 | int sysctl_amemthresh; |
| 863 | int sysctl_am_droprate; |
| 864 | int sysctl_drop_entry; |
| 865 | int sysctl_drop_packet; |
| 866 | int sysctl_secure_tcp; |
| 867 | #ifdef CONFIG_IP_VS_NFCT |
| 868 | int sysctl_conntrack; |
| 869 | #endif |
| 870 | int sysctl_snat_reroute; |
| 871 | int sysctl_sync_ver; |
| 872 | int sysctl_cache_bypass; |
| 873 | int sysctl_expire_nodest_conn; |
| 874 | int sysctl_expire_quiescent_template; |
| 875 | int sysctl_sync_threshold[2]; |
| 876 | int sysctl_nat_icmp_send; |
| 877 | |
| 878 | /* ip_vs_lblc */ |
| 879 | int sysctl_lblc_expiration; |
| 880 | struct ctl_table_header *lblc_ctl_header; |
| 881 | struct ctl_table *lblc_ctl_table; |
| 882 | /* ip_vs_lblcr */ |
| 883 | int sysctl_lblcr_expiration; |
| 884 | struct ctl_table_header *lblcr_ctl_header; |
| 885 | struct ctl_table *lblcr_ctl_table; |
| 886 | /* ip_vs_est */ |
| 887 | struct list_head est_list; /* estimator list */ |
| 888 | spinlock_t est_lock; |
| 889 | struct timer_list est_timer; /* Estimation timer */ |
| 890 | /* ip_vs_sync */ |
| 891 | struct list_head sync_queue; |
| 892 | spinlock_t sync_lock; |
| 893 | struct ip_vs_sync_buff *sync_buff; |
| 894 | spinlock_t sync_buff_lock; |
| 895 | struct sockaddr_in sync_mcast_addr; |
| 896 | struct task_struct *master_thread; |
| 897 | struct task_struct *backup_thread; |
| 898 | int send_mesg_maxlen; |
| 899 | int recv_mesg_maxlen; |
| 900 | volatile int sync_state; |
| 901 | volatile int master_syncid; |
| 902 | volatile int backup_syncid; |
| 903 | /* multicast interface name */ |
| 904 | char master_mcast_ifn[IP_VS_IFNAME_MAXLEN]; |
| 905 | char backup_mcast_ifn[IP_VS_IFNAME_MAXLEN]; |
| 906 | /* net name space ptr */ |
| 907 | struct net *net; /* Needed by timer routines */ |
| 908 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | |
Simon Horman | 59e0350 | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 910 | #define DEFAULT_SYNC_THRESHOLD 3 |
| 911 | #define DEFAULT_SYNC_PERIOD 50 |
Simon Horman | 7532e8d | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 912 | #define DEFAULT_SYNC_VER 1 |
Simon Horman | 59e0350 | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 913 | |
| 914 | #ifdef CONFIG_SYSCTL |
| 915 | |
| 916 | static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs) |
| 917 | { |
| 918 | return ipvs->sysctl_sync_threshold[0]; |
| 919 | } |
| 920 | |
| 921 | static inline int sysctl_sync_period(struct netns_ipvs *ipvs) |
| 922 | { |
| 923 | return ipvs->sysctl_sync_threshold[1]; |
| 924 | } |
| 925 | |
Simon Horman | 7532e8d | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 926 | static inline int sysctl_sync_ver(struct netns_ipvs *ipvs) |
| 927 | { |
| 928 | return ipvs->sysctl_sync_ver; |
| 929 | } |
| 930 | |
Simon Horman | 59e0350 | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 931 | #else |
| 932 | |
| 933 | static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs) |
| 934 | { |
| 935 | return DEFAULT_SYNC_THRESHOLD; |
| 936 | } |
| 937 | |
| 938 | static inline int sysctl_sync_period(struct netns_ipvs *ipvs) |
| 939 | { |
| 940 | return DEFAULT_SYNC_PERIOD; |
| 941 | } |
| 942 | |
Simon Horman | 7532e8d | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 943 | static inline int sysctl_sync_ver(struct netns_ipvs *ipvs) |
| 944 | { |
| 945 | return DEFAULT_SYNC_VER; |
| 946 | } |
| 947 | |
Simon Horman | 59e0350 | 2011-02-04 18:33:01 +0900 | [diff] [blame] | 948 | #endif |
| 949 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | /* |
| 951 | * IPVS core functions |
| 952 | * (from ip_vs_core.c) |
| 953 | */ |
| 954 | extern const char *ip_vs_proto_name(unsigned proto); |
| 955 | extern void ip_vs_init_hash_table(struct list_head *table, int rows); |
Sven Wegener | afdd614 | 2008-08-10 09:18:01 +0000 | [diff] [blame] | 956 | #define IP_VS_INIT_HASH_TABLE(t) ip_vs_init_hash_table((t), ARRAY_SIZE((t))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | #define IP_VS_APP_TYPE_FTP 1 |
| 959 | |
| 960 | /* |
| 961 | * ip_vs_conn handling functions |
| 962 | * (from ip_vs_conn.c) |
| 963 | */ |
| 964 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | enum { |
| 966 | IP_VS_DIR_INPUT = 0, |
| 967 | IP_VS_DIR_OUTPUT, |
| 968 | IP_VS_DIR_INPUT_ONLY, |
| 969 | IP_VS_DIR_LAST, |
| 970 | }; |
| 971 | |
Hans Schillstrom | 6e67e58 | 2011-01-03 14:44:57 +0100 | [diff] [blame] | 972 | static inline void ip_vs_conn_fill_param(struct net *net, int af, int protocol, |
Simon Horman | f11017e | 2010-08-22 21:37:52 +0900 | [diff] [blame] | 973 | const union nf_inet_addr *caddr, |
| 974 | __be16 cport, |
| 975 | const union nf_inet_addr *vaddr, |
| 976 | __be16 vport, |
| 977 | struct ip_vs_conn_param *p) |
| 978 | { |
Hans Schillstrom | 6e67e58 | 2011-01-03 14:44:57 +0100 | [diff] [blame] | 979 | p->net = net; |
Simon Horman | f11017e | 2010-08-22 21:37:52 +0900 | [diff] [blame] | 980 | p->af = af; |
| 981 | p->protocol = protocol; |
| 982 | p->caddr = caddr; |
| 983 | p->cport = cport; |
| 984 | p->vaddr = vaddr; |
| 985 | p->vport = vport; |
Simon Horman | 8599928 | 2010-08-22 21:37:53 +0900 | [diff] [blame] | 986 | p->pe = NULL; |
| 987 | p->pe_data = NULL; |
Simon Horman | f11017e | 2010-08-22 21:37:52 +0900 | [diff] [blame] | 988 | } |
Julius Volz | 28364a5 | 2008-09-02 15:55:43 +0200 | [diff] [blame] | 989 | |
Simon Horman | f11017e | 2010-08-22 21:37:52 +0900 | [diff] [blame] | 990 | struct ip_vs_conn *ip_vs_conn_in_get(const struct ip_vs_conn_param *p); |
| 991 | struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p); |
Julius Volz | 28364a5 | 2008-09-02 15:55:43 +0200 | [diff] [blame] | 992 | |
Simon Horman | 5c0d237 | 2010-08-02 17:12:44 +0200 | [diff] [blame] | 993 | struct ip_vs_conn * ip_vs_conn_in_get_proto(int af, const struct sk_buff *skb, |
Simon Horman | 5c0d237 | 2010-08-02 17:12:44 +0200 | [diff] [blame] | 994 | const struct ip_vs_iphdr *iph, |
| 995 | unsigned int proto_off, |
| 996 | int inverse); |
| 997 | |
Simon Horman | f11017e | 2010-08-22 21:37:52 +0900 | [diff] [blame] | 998 | struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | |
Simon Horman | 5c0d237 | 2010-08-02 17:12:44 +0200 | [diff] [blame] | 1000 | struct ip_vs_conn * ip_vs_conn_out_get_proto(int af, const struct sk_buff *skb, |
Simon Horman | 5c0d237 | 2010-08-02 17:12:44 +0200 | [diff] [blame] | 1001 | const struct ip_vs_iphdr *iph, |
| 1002 | unsigned int proto_off, |
| 1003 | int inverse); |
| 1004 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | /* put back the conn without restarting its timer */ |
| 1006 | static inline void __ip_vs_conn_put(struct ip_vs_conn *cp) |
| 1007 | { |
| 1008 | atomic_dec(&cp->refcnt); |
| 1009 | } |
| 1010 | extern void ip_vs_conn_put(struct ip_vs_conn *cp); |
Al Viro | 014d730 | 2006-09-28 14:29:52 -0700 | [diff] [blame] | 1011 | extern void ip_vs_conn_fill_cport(struct ip_vs_conn *cp, __be16 cport); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | |
Simon Horman | f11017e | 2010-08-22 21:37:52 +0900 | [diff] [blame] | 1013 | struct ip_vs_conn *ip_vs_conn_new(const struct ip_vs_conn_param *p, |
| 1014 | const union nf_inet_addr *daddr, |
| 1015 | __be16 dport, unsigned flags, |
Hans Schillstrom | 0e051e6 | 2010-11-19 14:25:07 +0100 | [diff] [blame] | 1016 | struct ip_vs_dest *dest, __u32 fwmark); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | extern void ip_vs_conn_expire_now(struct ip_vs_conn *cp); |
| 1018 | |
| 1019 | extern const char * ip_vs_state_name(__u16 proto, int state); |
| 1020 | |
Hans Schillstrom | 4a85b96 | 2011-01-03 14:44:47 +0100 | [diff] [blame] | 1021 | extern void ip_vs_tcp_conn_listen(struct net *net, struct ip_vs_conn *cp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | extern int ip_vs_check_template(struct ip_vs_conn *ct); |
Hans Schillstrom | f6340ee | 2011-01-03 14:44:59 +0100 | [diff] [blame] | 1023 | extern void ip_vs_random_dropentry(struct net *net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | extern int ip_vs_conn_init(void); |
| 1025 | extern void ip_vs_conn_cleanup(void); |
| 1026 | |
| 1027 | static inline void ip_vs_control_del(struct ip_vs_conn *cp) |
| 1028 | { |
| 1029 | struct ip_vs_conn *ctl_cp = cp->control; |
| 1030 | if (!ctl_cp) { |
Julius Volz | cfc78c5 | 2008-09-02 15:55:53 +0200 | [diff] [blame] | 1031 | IP_VS_ERR_BUF("request control DEL for uncontrolled: " |
| 1032 | "%s:%d to %s:%d\n", |
| 1033 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), |
| 1034 | ntohs(cp->cport), |
| 1035 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), |
| 1036 | ntohs(cp->vport)); |
| 1037 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | return; |
| 1039 | } |
| 1040 | |
Julius Volz | cfc78c5 | 2008-09-02 15:55:53 +0200 | [diff] [blame] | 1041 | IP_VS_DBG_BUF(7, "DELeting control for: " |
| 1042 | "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", |
| 1043 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), |
| 1044 | ntohs(cp->cport), |
| 1045 | IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), |
| 1046 | ntohs(ctl_cp->cport)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | |
| 1048 | cp->control = NULL; |
| 1049 | if (atomic_read(&ctl_cp->n_control) == 0) { |
Julius Volz | cfc78c5 | 2008-09-02 15:55:53 +0200 | [diff] [blame] | 1050 | IP_VS_ERR_BUF("BUG control DEL with n=0 : " |
| 1051 | "%s:%d to %s:%d\n", |
| 1052 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), |
| 1053 | ntohs(cp->cport), |
| 1054 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), |
| 1055 | ntohs(cp->vport)); |
| 1056 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | return; |
| 1058 | } |
| 1059 | atomic_dec(&ctl_cp->n_control); |
| 1060 | } |
| 1061 | |
| 1062 | static inline void |
| 1063 | ip_vs_control_add(struct ip_vs_conn *cp, struct ip_vs_conn *ctl_cp) |
| 1064 | { |
| 1065 | if (cp->control) { |
Julius Volz | cfc78c5 | 2008-09-02 15:55:53 +0200 | [diff] [blame] | 1066 | IP_VS_ERR_BUF("request control ADD for already controlled: " |
| 1067 | "%s:%d to %s:%d\n", |
| 1068 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), |
| 1069 | ntohs(cp->cport), |
| 1070 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), |
| 1071 | ntohs(cp->vport)); |
| 1072 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1073 | ip_vs_control_del(cp); |
| 1074 | } |
| 1075 | |
Julius Volz | cfc78c5 | 2008-09-02 15:55:53 +0200 | [diff] [blame] | 1076 | IP_VS_DBG_BUF(7, "ADDing control for: " |
| 1077 | "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", |
| 1078 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), |
| 1079 | ntohs(cp->cport), |
| 1080 | IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), |
| 1081 | ntohs(ctl_cp->cport)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | |
| 1083 | cp->control = ctl_cp; |
| 1084 | atomic_inc(&ctl_cp->n_control); |
| 1085 | } |
| 1086 | |
Hans Schillstrom | 7a4f076 | 2011-05-03 22:09:31 +0200 | [diff] [blame] | 1087 | /* |
| 1088 | * IPVS netns init & cleanup functions |
| 1089 | */ |
Hans Schillstrom | 503cf15 | 2011-05-01 18:50:16 +0200 | [diff] [blame] | 1090 | extern int ip_vs_estimator_net_init(struct net *net); |
| 1091 | extern int ip_vs_control_net_init(struct net *net); |
| 1092 | extern int ip_vs_protocol_net_init(struct net *net); |
| 1093 | extern int ip_vs_app_net_init(struct net *net); |
| 1094 | extern int ip_vs_conn_net_init(struct net *net); |
| 1095 | extern int ip_vs_sync_net_init(struct net *net); |
| 1096 | extern void ip_vs_conn_net_cleanup(struct net *net); |
| 1097 | extern void ip_vs_app_net_cleanup(struct net *net); |
| 1098 | extern void ip_vs_protocol_net_cleanup(struct net *net); |
| 1099 | extern void ip_vs_control_net_cleanup(struct net *net); |
| 1100 | extern void ip_vs_estimator_net_cleanup(struct net *net); |
| 1101 | extern void ip_vs_sync_net_cleanup(struct net *net); |
| 1102 | extern void ip_vs_service_net_cleanup(struct net *net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | |
| 1104 | /* |
| 1105 | * IPVS application functions |
| 1106 | * (from ip_vs_app.c) |
| 1107 | */ |
| 1108 | #define IP_VS_APP_MAX_PORTS 8 |
Hans Schillstrom | ab8a5e8 | 2011-01-03 14:44:53 +0100 | [diff] [blame] | 1109 | extern int register_ip_vs_app(struct net *net, struct ip_vs_app *app); |
| 1110 | extern void unregister_ip_vs_app(struct net *net, struct ip_vs_app *app); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | extern int ip_vs_bind_app(struct ip_vs_conn *cp, struct ip_vs_protocol *pp); |
| 1112 | extern void ip_vs_unbind_app(struct ip_vs_conn *cp); |
Hans Schillstrom | ab8a5e8 | 2011-01-03 14:44:53 +0100 | [diff] [blame] | 1113 | extern int register_ip_vs_app_inc(struct net *net, struct ip_vs_app *app, |
| 1114 | __u16 proto, __u16 port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | extern int ip_vs_app_inc_get(struct ip_vs_app *inc); |
| 1116 | extern void ip_vs_app_inc_put(struct ip_vs_app *inc); |
| 1117 | |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 1118 | extern int ip_vs_app_pkt_out(struct ip_vs_conn *, struct sk_buff *skb); |
| 1119 | extern int ip_vs_app_pkt_in(struct ip_vs_conn *, struct sk_buff *skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | |
Simon Horman | 8be67a6 | 2010-08-22 21:37:54 +0900 | [diff] [blame] | 1121 | void ip_vs_bind_pe(struct ip_vs_service *svc, struct ip_vs_pe *pe); |
| 1122 | void ip_vs_unbind_pe(struct ip_vs_service *svc); |
| 1123 | int register_ip_vs_pe(struct ip_vs_pe *pe); |
| 1124 | int unregister_ip_vs_pe(struct ip_vs_pe *pe); |
Simon Horman | e9e5eee | 2010-11-08 20:05:57 +0900 | [diff] [blame] | 1125 | struct ip_vs_pe *ip_vs_pe_getbyname(const char *name); |
Hans Schillstrom | fe5e7a1 | 2010-11-19 14:25:12 +0100 | [diff] [blame] | 1126 | struct ip_vs_pe *__ip_vs_pe_getbyname(const char *pe_name); |
Simon Horman | e9e5eee | 2010-11-08 20:05:57 +0900 | [diff] [blame] | 1127 | |
| 1128 | static inline void ip_vs_pe_get(const struct ip_vs_pe *pe) |
| 1129 | { |
| 1130 | if (pe && pe->module) |
| 1131 | __module_get(pe->module); |
| 1132 | } |
| 1133 | |
| 1134 | static inline void ip_vs_pe_put(const struct ip_vs_pe *pe) |
| 1135 | { |
| 1136 | if (pe && pe->module) |
| 1137 | module_put(pe->module); |
| 1138 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | |
| 1140 | /* |
| 1141 | * IPVS protocol functions (from ip_vs_proto.c) |
| 1142 | */ |
| 1143 | extern int ip_vs_protocol_init(void); |
| 1144 | extern void ip_vs_protocol_cleanup(void); |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1145 | extern void ip_vs_protocol_timeout_change(struct netns_ipvs *ipvs, int flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | extern int *ip_vs_create_timeout_table(int *table, int size); |
| 1147 | extern int |
Jan Engelhardt | 36cbd3d | 2009-08-05 10:42:58 -0700 | [diff] [blame] | 1148 | ip_vs_set_state_timeout(int *table, int num, const char *const *names, |
| 1149 | const char *name, int to); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1150 | extern void |
Julian Anastasov | 0d79641 | 2010-10-17 16:46:17 +0300 | [diff] [blame] | 1151 | ip_vs_tcpudp_debug_packet(int af, struct ip_vs_protocol *pp, |
| 1152 | const struct sk_buff *skb, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | int offset, const char *msg); |
| 1154 | |
| 1155 | extern struct ip_vs_protocol ip_vs_protocol_tcp; |
| 1156 | extern struct ip_vs_protocol ip_vs_protocol_udp; |
| 1157 | extern struct ip_vs_protocol ip_vs_protocol_icmp; |
| 1158 | extern struct ip_vs_protocol ip_vs_protocol_esp; |
| 1159 | extern struct ip_vs_protocol ip_vs_protocol_ah; |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 1160 | extern struct ip_vs_protocol ip_vs_protocol_sctp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | |
| 1162 | /* |
| 1163 | * Registering/unregistering scheduler functions |
| 1164 | * (from ip_vs_sched.c) |
| 1165 | */ |
| 1166 | extern int register_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); |
| 1167 | extern int unregister_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); |
| 1168 | extern int ip_vs_bind_scheduler(struct ip_vs_service *svc, |
| 1169 | struct ip_vs_scheduler *scheduler); |
| 1170 | extern int ip_vs_unbind_scheduler(struct ip_vs_service *svc); |
| 1171 | extern struct ip_vs_scheduler *ip_vs_scheduler_get(const char *sched_name); |
| 1172 | extern void ip_vs_scheduler_put(struct ip_vs_scheduler *scheduler); |
| 1173 | extern struct ip_vs_conn * |
Julian Anastasov | 190ecd2 | 2010-10-17 16:24:37 +0300 | [diff] [blame] | 1174 | ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb, |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1175 | struct ip_vs_proto_data *pd, int *ignored); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | extern 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] | 1177 | struct ip_vs_proto_data *pd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | |
Patrick Schaaf | 41ac51e | 2011-02-11 14:01:12 +0100 | [diff] [blame] | 1179 | extern void ip_vs_scheduler_err(struct ip_vs_service *svc, const char *msg); |
| 1180 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | |
| 1182 | /* |
| 1183 | * IPVS control data and functions (from ip_vs_ctl.c) |
| 1184 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | extern struct ip_vs_stats ip_vs_stats; |
Sven Wegener | 5587da5 | 2008-08-10 18:24:40 +0000 | [diff] [blame] | 1186 | extern const struct ctl_path net_vs_ctl_path[]; |
Hans Schillstrom | b880c1f | 2010-11-19 14:25:14 +0100 | [diff] [blame] | 1187 | extern int sysctl_ip_vs_sync_ver; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | |
Hans Schillstrom | f131315 | 2011-01-03 14:44:55 +0100 | [diff] [blame] | 1189 | extern void ip_vs_sync_switch_mode(struct net *net, int mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1190 | extern struct ip_vs_service * |
Hans Schillstrom | fc72325 | 2011-01-03 14:44:43 +0100 | [diff] [blame] | 1191 | ip_vs_service_get(struct net *net, int af, __u32 fwmark, __u16 protocol, |
Julius Volz | 3c2e050 | 2008-09-02 15:55:38 +0200 | [diff] [blame] | 1192 | const union nf_inet_addr *vaddr, __be16 vport); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | |
| 1194 | static inline void ip_vs_service_put(struct ip_vs_service *svc) |
| 1195 | { |
| 1196 | atomic_dec(&svc->usecnt); |
| 1197 | } |
| 1198 | |
| 1199 | extern struct ip_vs_dest * |
Hans Schillstrom | fc72325 | 2011-01-03 14:44:43 +0100 | [diff] [blame] | 1200 | ip_vs_lookup_real_service(struct net *net, int af, __u16 protocol, |
Julius Volz | 7937df1 | 2008-09-02 15:55:48 +0200 | [diff] [blame] | 1201 | const union nf_inet_addr *daddr, __be16 dport); |
| 1202 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | extern int ip_vs_use_count_inc(void); |
| 1204 | extern void ip_vs_use_count_dec(void); |
| 1205 | extern int ip_vs_control_init(void); |
| 1206 | extern void ip_vs_control_cleanup(void); |
Rumen G. Bogdanovski | 1e356f9 | 2007-11-07 02:35:54 -0800 | [diff] [blame] | 1207 | extern struct ip_vs_dest * |
Hans Schillstrom | fc72325 | 2011-01-03 14:44:43 +0100 | [diff] [blame] | 1208 | ip_vs_find_dest(struct net *net, int af, const union nf_inet_addr *daddr, |
| 1209 | __be16 dport, const union nf_inet_addr *vaddr, __be16 vport, |
| 1210 | __u16 protocol, __u32 fwmark); |
Rumen G. Bogdanovski | 1e356f9 | 2007-11-07 02:35:54 -0800 | [diff] [blame] | 1211 | extern struct ip_vs_dest *ip_vs_try_bind_dest(struct ip_vs_conn *cp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | |
| 1213 | |
| 1214 | /* |
| 1215 | * IPVS sync daemon data and function prototypes |
| 1216 | * (from ip_vs_sync.c) |
| 1217 | */ |
Hans Schillstrom | f131315 | 2011-01-03 14:44:55 +0100 | [diff] [blame] | 1218 | extern int start_sync_thread(struct net *net, int state, char *mcast_ifn, |
| 1219 | __u8 syncid); |
| 1220 | extern int stop_sync_thread(struct net *net, int state); |
| 1221 | extern void ip_vs_sync_conn(struct net *net, struct ip_vs_conn *cp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | |
| 1223 | |
| 1224 | /* |
| 1225 | * IPVS rate estimator prototypes (from ip_vs_est.c) |
| 1226 | */ |
Julian Anastasov | 6ef757f | 2011-03-14 01:44:28 +0200 | [diff] [blame] | 1227 | extern void ip_vs_start_estimator(struct net *net, struct ip_vs_stats *stats); |
| 1228 | extern void ip_vs_stop_estimator(struct net *net, struct ip_vs_stats *stats); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1229 | extern void ip_vs_zero_estimator(struct ip_vs_stats *stats); |
Julian Anastasov | ea9f22c | 2011-03-14 01:41:54 +0200 | [diff] [blame] | 1230 | extern void ip_vs_read_estimator(struct ip_vs_stats_user *dst, |
| 1231 | struct ip_vs_stats *stats); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1232 | |
| 1233 | /* |
| 1234 | * Various IPVS packet transmitters (from ip_vs_xmit.c) |
| 1235 | */ |
| 1236 | extern int ip_vs_null_xmit |
| 1237 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); |
| 1238 | extern int ip_vs_bypass_xmit |
| 1239 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); |
| 1240 | extern int ip_vs_nat_xmit |
| 1241 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); |
| 1242 | extern int ip_vs_tunnel_xmit |
| 1243 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); |
| 1244 | extern int ip_vs_dr_xmit |
| 1245 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); |
| 1246 | extern int ip_vs_icmp_xmit |
Julian Anastasov | c92f5ca | 2011-05-10 12:46:05 +0000 | [diff] [blame] | 1247 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp, |
| 1248 | int offset, unsigned int hooknum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | extern void ip_vs_dst_reset(struct ip_vs_dest *dest); |
| 1250 | |
Julius Volz | b3cdd2a7 | 2008-09-02 15:55:45 +0200 | [diff] [blame] | 1251 | #ifdef CONFIG_IP_VS_IPV6 |
| 1252 | extern int ip_vs_bypass_xmit_v6 |
| 1253 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); |
| 1254 | extern int ip_vs_nat_xmit_v6 |
| 1255 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); |
| 1256 | extern int ip_vs_tunnel_xmit_v6 |
| 1257 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); |
| 1258 | extern int ip_vs_dr_xmit_v6 |
| 1259 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); |
| 1260 | extern int ip_vs_icmp_xmit_v6 |
| 1261 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp, |
Julian Anastasov | c92f5ca | 2011-05-10 12:46:05 +0000 | [diff] [blame] | 1262 | int offset, unsigned int hooknum); |
Julius Volz | b3cdd2a7 | 2008-09-02 15:55:45 +0200 | [diff] [blame] | 1263 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | |
Simon Horman | 3a1bbf1 | 2011-02-04 18:33:02 +0900 | [diff] [blame] | 1265 | #ifdef CONFIG_SYSCTL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | /* |
| 1267 | * This is a simple mechanism to ignore packets when |
| 1268 | * we are loaded. Just set ip_vs_drop_rate to 'n' and |
| 1269 | * we start to drop 1/rate of the packets |
| 1270 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1271 | |
Hans Schillstrom | a0840e2 | 2011-01-03 14:44:58 +0100 | [diff] [blame] | 1272 | static inline int ip_vs_todrop(struct netns_ipvs *ipvs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | { |
Hans Schillstrom | a0840e2 | 2011-01-03 14:44:58 +0100 | [diff] [blame] | 1274 | if (!ipvs->drop_rate) |
| 1275 | return 0; |
| 1276 | if (--ipvs->drop_counter > 0) |
| 1277 | return 0; |
| 1278 | ipvs->drop_counter = ipvs->drop_rate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | return 1; |
| 1280 | } |
Simon Horman | 3a1bbf1 | 2011-02-04 18:33:02 +0900 | [diff] [blame] | 1281 | #else |
| 1282 | static inline int ip_vs_todrop(struct netns_ipvs *ipvs) { return 0; } |
| 1283 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | |
| 1285 | /* |
| 1286 | * ip_vs_fwd_tag returns the forwarding tag of the connection |
| 1287 | */ |
| 1288 | #define IP_VS_FWD_METHOD(cp) (cp->flags & IP_VS_CONN_F_FWD_MASK) |
| 1289 | |
Adrian Bunk | 732db65 | 2005-09-01 17:40:26 -0700 | [diff] [blame] | 1290 | static inline char ip_vs_fwd_tag(struct ip_vs_conn *cp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1291 | { |
| 1292 | char fwd; |
| 1293 | |
| 1294 | switch (IP_VS_FWD_METHOD(cp)) { |
| 1295 | case IP_VS_CONN_F_MASQ: |
| 1296 | fwd = 'M'; break; |
| 1297 | case IP_VS_CONN_F_LOCALNODE: |
| 1298 | fwd = 'L'; break; |
| 1299 | case IP_VS_CONN_F_TUNNEL: |
| 1300 | fwd = 'T'; break; |
| 1301 | case IP_VS_CONN_F_DROUTE: |
| 1302 | fwd = 'R'; break; |
| 1303 | case IP_VS_CONN_F_BYPASS: |
| 1304 | fwd = 'B'; break; |
| 1305 | default: |
| 1306 | fwd = '?'; break; |
| 1307 | } |
| 1308 | return fwd; |
| 1309 | } |
| 1310 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1311 | extern void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp, |
Julius Volz | b3cdd2a7 | 2008-09-02 15:55:45 +0200 | [diff] [blame] | 1312 | struct ip_vs_conn *cp, int dir); |
| 1313 | |
| 1314 | #ifdef CONFIG_IP_VS_IPV6 |
| 1315 | extern void ip_vs_nat_icmp_v6(struct sk_buff *skb, struct ip_vs_protocol *pp, |
| 1316 | struct ip_vs_conn *cp, int dir); |
| 1317 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1318 | |
Al Viro | b1550f2 | 2006-11-14 21:37:50 -0800 | [diff] [blame] | 1319 | extern __sum16 ip_vs_checksum_complete(struct sk_buff *skb, int offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1320 | |
Al Viro | f9214b2 | 2006-11-16 02:41:18 -0800 | [diff] [blame] | 1321 | static inline __wsum ip_vs_check_diff4(__be32 old, __be32 new, __wsum oldsum) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | { |
Al Viro | f9214b2 | 2006-11-16 02:41:18 -0800 | [diff] [blame] | 1323 | __be32 diff[2] = { ~old, new }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1324 | |
Joe Perches | 07f0757 | 2008-11-19 15:44:53 -0800 | [diff] [blame] | 1325 | return csum_partial(diff, sizeof(diff), oldsum); |
Al Viro | f9214b2 | 2006-11-16 02:41:18 -0800 | [diff] [blame] | 1326 | } |
| 1327 | |
Julius Volz | 0bbdd42 | 2008-09-02 15:55:42 +0200 | [diff] [blame] | 1328 | #ifdef CONFIG_IP_VS_IPV6 |
| 1329 | static inline __wsum ip_vs_check_diff16(const __be32 *old, const __be32 *new, |
| 1330 | __wsum oldsum) |
| 1331 | { |
| 1332 | __be32 diff[8] = { ~old[3], ~old[2], ~old[1], ~old[0], |
| 1333 | new[3], new[2], new[1], new[0] }; |
| 1334 | |
Joe Perches | 07f0757 | 2008-11-19 15:44:53 -0800 | [diff] [blame] | 1335 | return csum_partial(diff, sizeof(diff), oldsum); |
Julius Volz | 0bbdd42 | 2008-09-02 15:55:42 +0200 | [diff] [blame] | 1336 | } |
| 1337 | #endif |
| 1338 | |
Al Viro | f9214b2 | 2006-11-16 02:41:18 -0800 | [diff] [blame] | 1339 | static inline __wsum ip_vs_check_diff2(__be16 old, __be16 new, __wsum oldsum) |
| 1340 | { |
| 1341 | __be16 diff[2] = { ~old, new }; |
| 1342 | |
Joe Perches | 07f0757 | 2008-11-19 15:44:53 -0800 | [diff] [blame] | 1343 | return csum_partial(diff, sizeof(diff), oldsum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | } |
| 1345 | |
Julian Anastasov | cf356d6 | 2010-10-17 16:21:07 +0300 | [diff] [blame] | 1346 | /* |
| 1347 | * Forget current conntrack (unconfirmed) and attach notrack entry |
| 1348 | */ |
| 1349 | static inline void ip_vs_notrack(struct sk_buff *skb) |
| 1350 | { |
| 1351 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) |
| 1352 | enum ip_conntrack_info ctinfo; |
Jesper Juhl | 06b6939 | 2011-03-09 22:55:05 +0100 | [diff] [blame] | 1353 | struct nf_conn *ct = nf_ct_get(skb, &ctinfo); |
Julian Anastasov | cf356d6 | 2010-10-17 16:21:07 +0300 | [diff] [blame] | 1354 | |
| 1355 | if (!ct || !nf_ct_is_untracked(ct)) { |
| 1356 | nf_reset(skb); |
| 1357 | skb->nfct = &nf_ct_untracked_get()->ct_general; |
| 1358 | skb->nfctinfo = IP_CT_NEW; |
| 1359 | nf_conntrack_get(skb->nfct); |
| 1360 | } |
| 1361 | #endif |
| 1362 | } |
| 1363 | |
Julian Anastasov | f4bc17c | 2010-09-21 17:35:41 +0200 | [diff] [blame] | 1364 | #ifdef CONFIG_IP_VS_NFCT |
| 1365 | /* |
| 1366 | * Netfilter connection tracking |
| 1367 | * (from ip_vs_nfct.c) |
| 1368 | */ |
Hans Schillstrom | a0840e2 | 2011-01-03 14:44:58 +0100 | [diff] [blame] | 1369 | static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs) |
Julian Anastasov | f4bc17c | 2010-09-21 17:35:41 +0200 | [diff] [blame] | 1370 | { |
Simon Horman | a4e2f5a | 2011-02-04 18:33:02 +0900 | [diff] [blame] | 1371 | #ifdef CONFIG_SYSCTL |
Hans Schillstrom | a0840e2 | 2011-01-03 14:44:58 +0100 | [diff] [blame] | 1372 | return ipvs->sysctl_conntrack; |
Simon Horman | a4e2f5a | 2011-02-04 18:33:02 +0900 | [diff] [blame] | 1373 | #else |
| 1374 | return 0; |
| 1375 | #endif |
Julian Anastasov | f4bc17c | 2010-09-21 17:35:41 +0200 | [diff] [blame] | 1376 | } |
| 1377 | |
Julian Anastasov | 6523ce1 | 2010-09-05 18:02:29 +0000 | [diff] [blame] | 1378 | extern void ip_vs_update_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp, |
| 1379 | int outin); |
Julian Anastasov | f4bc17c | 2010-09-21 17:35:41 +0200 | [diff] [blame] | 1380 | extern int ip_vs_confirm_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp); |
| 1381 | extern void ip_vs_nfct_expect_related(struct sk_buff *skb, struct nf_conn *ct, |
| 1382 | struct ip_vs_conn *cp, u_int8_t proto, |
| 1383 | const __be16 port, int from_rs); |
| 1384 | extern void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp); |
| 1385 | |
| 1386 | #else |
| 1387 | |
Hans Schillstrom | a0840e2 | 2011-01-03 14:44:58 +0100 | [diff] [blame] | 1388 | static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs) |
Julian Anastasov | f4bc17c | 2010-09-21 17:35:41 +0200 | [diff] [blame] | 1389 | { |
| 1390 | return 0; |
| 1391 | } |
| 1392 | |
| 1393 | static inline void ip_vs_update_conntrack(struct sk_buff *skb, |
| 1394 | struct ip_vs_conn *cp, int outin) |
| 1395 | { |
| 1396 | } |
| 1397 | |
| 1398 | static inline int ip_vs_confirm_conntrack(struct sk_buff *skb, |
| 1399 | struct ip_vs_conn *cp) |
| 1400 | { |
| 1401 | return NF_ACCEPT; |
| 1402 | } |
| 1403 | |
| 1404 | static inline void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp) |
| 1405 | { |
| 1406 | } |
| 1407 | /* CONFIG_IP_VS_NFCT */ |
| 1408 | #endif |
Julian Anastasov | 6523ce1 | 2010-09-05 18:02:29 +0000 | [diff] [blame] | 1409 | |
Changli Gao | b552f7e | 2011-02-19 17:32:28 +0800 | [diff] [blame] | 1410 | static inline unsigned int |
| 1411 | ip_vs_dest_conn_overhead(struct ip_vs_dest *dest) |
| 1412 | { |
| 1413 | /* |
| 1414 | * We think the overhead of processing active connections is 256 |
| 1415 | * times higher than that of inactive connections in average. (This |
| 1416 | * 256 times might not be accurate, we will change it later) We |
| 1417 | * use the following formula to estimate the overhead now: |
| 1418 | * dest->activeconns*256 + dest->inactconns |
| 1419 | */ |
| 1420 | return (atomic_read(&dest->activeconns) << 8) + |
| 1421 | atomic_read(&dest->inactconns); |
| 1422 | } |
| 1423 | |
Julius Volz | bc4768e | 2008-07-31 20:45:24 -0700 | [diff] [blame] | 1424 | #endif /* _NET_IP_VS_H */ |