| /* |
| * IP Virtual Server |
| * data structure and functionality definitions |
| */ |
| |
| #ifndef _NET_IP_VS_H |
| #define _NET_IP_VS_H |
| |
| #include <linux/ip_vs.h> /* definitions shared with userland */ |
| |
| #include <asm/types.h> /* for __uXX types */ |
| |
| #include <linux/list.h> /* for struct list_head */ |
| #include <linux/spinlock.h> /* for struct rwlock_t */ |
| #include <linux/atomic.h> /* for struct atomic_t */ |
| #include <linux/compiler.h> |
| #include <linux/timer.h> |
| #include <linux/bug.h> |
| |
| #include <net/checksum.h> |
| #include <linux/netfilter.h> /* for union nf_inet_addr */ |
| #include <linux/ip.h> |
| #include <linux/ipv6.h> /* for struct ipv6hdr */ |
| #include <net/ipv6.h> |
| #if IS_ENABLED(CONFIG_IP_VS_IPV6) |
| #include <linux/netfilter_ipv6/ip6_tables.h> |
| #endif |
| #if IS_ENABLED(CONFIG_NF_CONNTRACK) |
| #include <net/netfilter/nf_conntrack.h> |
| #endif |
| #include <net/net_namespace.h> /* Netw namespace */ |
| |
| /* |
| * Generic access of ipvs struct |
| */ |
| static inline struct netns_ipvs *net_ipvs(struct net* net) |
| { |
| return net->ipvs; |
| } |
| /* |
| * Get net ptr from skb in traffic cases |
| * use skb_sknet when call is from userland (ioctl or netlink) |
| */ |
| static inline struct net *skb_net(const struct sk_buff *skb) |
| { |
| #ifdef CONFIG_NET_NS |
| #ifdef CONFIG_IP_VS_DEBUG |
| /* |
| * This is used for debug only. |
| * Start with the most likely hit |
| * End with BUG |
| */ |
| if (likely(skb->dev && skb->dev->nd_net)) |
| return dev_net(skb->dev); |
| if (skb_dst(skb) && skb_dst(skb)->dev) |
| return dev_net(skb_dst(skb)->dev); |
| WARN(skb->sk, "Maybe skb_sknet should be used in %s() at line:%d\n", |
| __func__, __LINE__); |
| if (likely(skb->sk && skb->sk->sk_net)) |
| return sock_net(skb->sk); |
| pr_err("There is no net ptr to find in the skb in %s() line:%d\n", |
| __func__, __LINE__); |
| BUG(); |
| #else |
| return dev_net(skb->dev ? : skb_dst(skb)->dev); |
| #endif |
| #else |
| return &init_net; |
| #endif |
| } |
| |
| static inline struct net *skb_sknet(const struct sk_buff *skb) |
| { |
| #ifdef CONFIG_NET_NS |
| #ifdef CONFIG_IP_VS_DEBUG |
| /* Start with the most likely hit */ |
| if (likely(skb->sk && skb->sk->sk_net)) |
| return sock_net(skb->sk); |
| WARN(skb->dev, "Maybe skb_net should be used instead in %s() line:%d\n", |
| __func__, __LINE__); |
| if (likely(skb->dev && skb->dev->nd_net)) |
| return dev_net(skb->dev); |
| pr_err("There is no net ptr to find in the skb in %s() line:%d\n", |
| __func__, __LINE__); |
| BUG(); |
| #else |
| return sock_net(skb->sk); |
| #endif |
| #else |
| return &init_net; |
| #endif |
| } |
| /* |
| * This one needed for single_open_net since net is stored directly in |
| * private not as a struct i.e. seq_file_net can't be used. |
| */ |
| static inline struct net *seq_file_single_net(struct seq_file *seq) |
| { |
| #ifdef CONFIG_NET_NS |
| return (struct net *)seq->private; |
| #else |
| return &init_net; |
| #endif |
| } |
| |
| /* Connections' size value needed by ip_vs_ctl.c */ |
| extern int ip_vs_conn_tab_size; |
| |
| struct ip_vs_iphdr { |
| __u32 len; /* IPv4 simply where L4 starts |
| IPv6 where L4 Transport Header starts */ |
| __u32 thoff_reasm; /* Transport Header Offset in nfct_reasm skb */ |
| __u16 fragoffs; /* IPv6 fragment offset, 0 if first frag (or not frag)*/ |
| __s16 protocol; |
| __s32 flags; |
| union nf_inet_addr saddr; |
| union nf_inet_addr daddr; |
| }; |
| |
| /* Dependency to module: nf_defrag_ipv6 */ |
| #if defined(CONFIG_NF_DEFRAG_IPV6) || defined(CONFIG_NF_DEFRAG_IPV6_MODULE) |
| static inline struct sk_buff *skb_nfct_reasm(const struct sk_buff *skb) |
| { |
| return skb->nfct_reasm; |
| } |
| static inline void *frag_safe_skb_hp(const struct sk_buff *skb, int offset, |
| int len, void *buffer, |
| const struct ip_vs_iphdr *ipvsh) |
| { |
| if (unlikely(ipvsh->fragoffs && skb_nfct_reasm(skb))) |
| return skb_header_pointer(skb_nfct_reasm(skb), |
| ipvsh->thoff_reasm, len, buffer); |
| |
| return skb_header_pointer(skb, offset, len, buffer); |
| } |
| #else |
| static inline struct sk_buff *skb_nfct_reasm(const struct sk_buff *skb) |
| { |
| return NULL; |
| } |
| static inline void *frag_safe_skb_hp(const struct sk_buff *skb, int offset, |
| int len, void *buffer, |
| const struct ip_vs_iphdr *ipvsh) |
| { |
| return skb_header_pointer(skb, offset, len, buffer); |
| } |
| #endif |
| |
| static inline void |
| ip_vs_fill_ip4hdr(const void *nh, struct ip_vs_iphdr *iphdr) |
| { |
| const struct iphdr *iph = nh; |
| |
| iphdr->len = iph->ihl * 4; |
| iphdr->fragoffs = 0; |
| iphdr->protocol = iph->protocol; |
| iphdr->saddr.ip = iph->saddr; |
| iphdr->daddr.ip = iph->daddr; |
| } |
| |
| /* This function handles filling *ip_vs_iphdr, both for IPv4 and IPv6. |
| * IPv6 requires some extra work, as finding proper header position, |
| * depend on the IPv6 extension headers. |
| */ |
| static inline void |
| ip_vs_fill_iph_skb(int af, const struct sk_buff *skb, struct ip_vs_iphdr *iphdr) |
| { |
| #ifdef CONFIG_IP_VS_IPV6 |
| if (af == AF_INET6) { |
| const struct ipv6hdr *iph = |
| (struct ipv6hdr *)skb_network_header(skb); |
| iphdr->saddr.in6 = iph->saddr; |
| iphdr->daddr.in6 = iph->daddr; |
| /* ipv6_find_hdr() updates len, flags, thoff_reasm */ |
| iphdr->thoff_reasm = 0; |
| iphdr->len = 0; |
| iphdr->flags = 0; |
| iphdr->protocol = ipv6_find_hdr(skb, &iphdr->len, -1, |
| &iphdr->fragoffs, |
| &iphdr->flags); |
| /* get proto from re-assembled packet and it's offset */ |
| if (skb_nfct_reasm(skb)) |
| iphdr->protocol = ipv6_find_hdr(skb_nfct_reasm(skb), |
| &iphdr->thoff_reasm, |
| -1, NULL, NULL); |
| |
| } else |
| #endif |
| { |
| const struct iphdr *iph = |
| (struct iphdr *)skb_network_header(skb); |
| iphdr->len = iph->ihl * 4; |
| iphdr->fragoffs = 0; |
| iphdr->protocol = iph->protocol; |
| iphdr->saddr.ip = iph->saddr; |
| iphdr->daddr.ip = iph->daddr; |
| } |
| } |
| |
| /* This function is a faster version of ip_vs_fill_iph_skb(). |
| * Where we only populate {s,d}addr (and avoid calling ipv6_find_hdr()). |
| * This is used by the some of the ip_vs_*_schedule() functions. |
| * (Mostly done to avoid ABI breakage of external schedulers) |
| */ |
| static inline void |
| ip_vs_fill_iph_addr_only(int af, const struct sk_buff *skb, |
| struct ip_vs_iphdr *iphdr) |
| { |
| #ifdef CONFIG_IP_VS_IPV6 |
| if (af == AF_INET6) { |
| const struct ipv6hdr *iph = |
| (struct ipv6hdr *)skb_network_header(skb); |
| iphdr->saddr.in6 = iph->saddr; |
| iphdr->daddr.in6 = iph->daddr; |
| } else |
| #endif |
| { |
| const struct iphdr *iph = |
| (struct iphdr *)skb_network_header(skb); |
| iphdr->saddr.ip = iph->saddr; |
| iphdr->daddr.ip = iph->daddr; |
| } |
| } |
| |
| static inline void ip_vs_addr_copy(int af, union nf_inet_addr *dst, |
| const union nf_inet_addr *src) |
| { |
| #ifdef CONFIG_IP_VS_IPV6 |
| if (af == AF_INET6) |
| dst->in6 = src->in6; |
| else |
| #endif |
| dst->ip = src->ip; |
| } |
| |
| static inline int ip_vs_addr_equal(int af, const union nf_inet_addr *a, |
| const union nf_inet_addr *b) |
| { |
| #ifdef CONFIG_IP_VS_IPV6 |
| if (af == AF_INET6) |
| return ipv6_addr_equal(&a->in6, &b->in6); |
| #endif |
| return a->ip == b->ip; |
| } |
| |
| #ifdef CONFIG_IP_VS_DEBUG |
| #include <linux/net.h> |
| |
| extern int ip_vs_get_debug_level(void); |
| |
| static inline const char *ip_vs_dbg_addr(int af, char *buf, size_t buf_len, |
| const union nf_inet_addr *addr, |
| int *idx) |
| { |
| int len; |
| #ifdef CONFIG_IP_VS_IPV6 |
| if (af == AF_INET6) |
| len = snprintf(&buf[*idx], buf_len - *idx, "[%pI6c]", |
| &addr->in6) + 1; |
| else |
| #endif |
| len = snprintf(&buf[*idx], buf_len - *idx, "%pI4", |
| &addr->ip) + 1; |
| |
| *idx += len; |
| BUG_ON(*idx > buf_len + 1); |
| return &buf[*idx - len]; |
| } |
| |
| #define IP_VS_DBG_BUF(level, msg, ...) \ |
| do { \ |
| char ip_vs_dbg_buf[160]; \ |
| int ip_vs_dbg_idx = 0; \ |
| if (level <= ip_vs_get_debug_level()) \ |
| printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ |
| } while (0) |
| #define IP_VS_ERR_BUF(msg...) \ |
| do { \ |
| char ip_vs_dbg_buf[160]; \ |
| int ip_vs_dbg_idx = 0; \ |
| pr_err(msg); \ |
| } while (0) |
| |
| /* Only use from within IP_VS_DBG_BUF() or IP_VS_ERR_BUF macros */ |
| #define IP_VS_DBG_ADDR(af, addr) \ |
| ip_vs_dbg_addr(af, ip_vs_dbg_buf, \ |
| sizeof(ip_vs_dbg_buf), addr, \ |
| &ip_vs_dbg_idx) |
| |
| #define IP_VS_DBG(level, msg, ...) \ |
| do { \ |
| if (level <= ip_vs_get_debug_level()) \ |
| printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ |
| } while (0) |
| #define IP_VS_DBG_RL(msg, ...) \ |
| do { \ |
| if (net_ratelimit()) \ |
| printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ |
| } while (0) |
| #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) \ |
| do { \ |
| if (level <= ip_vs_get_debug_level()) \ |
| pp->debug_packet(af, pp, skb, ofs, msg); \ |
| } while (0) |
| #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) \ |
| do { \ |
| if (level <= ip_vs_get_debug_level() && \ |
| net_ratelimit()) \ |
| pp->debug_packet(af, pp, skb, ofs, msg); \ |
| } while (0) |
| #else /* NO DEBUGGING at ALL */ |
| #define IP_VS_DBG_BUF(level, msg...) do {} while (0) |
| #define IP_VS_ERR_BUF(msg...) do {} while (0) |
| #define IP_VS_DBG(level, msg...) do {} while (0) |
| #define IP_VS_DBG_RL(msg...) do {} while (0) |
| #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) do {} while (0) |
| #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) do {} while (0) |
| #endif |
| |
| #define IP_VS_BUG() BUG() |
| #define IP_VS_ERR_RL(msg, ...) \ |
| do { \ |
| if (net_ratelimit()) \ |
| pr_err(msg, ##__VA_ARGS__); \ |
| } while (0) |
| |
| #ifdef CONFIG_IP_VS_DEBUG |
| #define EnterFunction(level) \ |
| do { \ |
| if (level <= ip_vs_get_debug_level()) \ |
| printk(KERN_DEBUG \ |
| pr_fmt("Enter: %s, %s line %i\n"), \ |
| __func__, __FILE__, __LINE__); \ |
| } while (0) |
| #define LeaveFunction(level) \ |
| do { \ |
| if (level <= ip_vs_get_debug_level()) \ |
| printk(KERN_DEBUG \ |
| pr_fmt("Leave: %s, %s line %i\n"), \ |
| __func__, __FILE__, __LINE__); \ |
| } while (0) |
| #else |
| #define EnterFunction(level) do {} while (0) |
| #define LeaveFunction(level) do {} while (0) |
| #endif |
| |
| #define IP_VS_WAIT_WHILE(expr) while (expr) { cpu_relax(); } |
| |
| |
| /* |
| * The port number of FTP service (in network order). |
| */ |
| #define FTPPORT cpu_to_be16(21) |
| #define FTPDATA cpu_to_be16(20) |
| |
| /* |
| * TCP State Values |
| */ |
| enum { |
| IP_VS_TCP_S_NONE = 0, |
| IP_VS_TCP_S_ESTABLISHED, |
| IP_VS_TCP_S_SYN_SENT, |
| IP_VS_TCP_S_SYN_RECV, |
| IP_VS_TCP_S_FIN_WAIT, |
| IP_VS_TCP_S_TIME_WAIT, |
| IP_VS_TCP_S_CLOSE, |
| IP_VS_TCP_S_CLOSE_WAIT, |
| IP_VS_TCP_S_LAST_ACK, |
| IP_VS_TCP_S_LISTEN, |
| IP_VS_TCP_S_SYNACK, |
| IP_VS_TCP_S_LAST |
| }; |
| |
| /* |
| * UDP State Values |
| */ |
| enum { |
| IP_VS_UDP_S_NORMAL, |
| IP_VS_UDP_S_LAST, |
| }; |
| |
| /* |
| * ICMP State Values |
| */ |
| enum { |
| IP_VS_ICMP_S_NORMAL, |
| IP_VS_ICMP_S_LAST, |
| }; |
| |
| /* |
| * SCTP State Values |
| */ |
| enum ip_vs_sctp_states { |
| IP_VS_SCTP_S_NONE, |
| IP_VS_SCTP_S_INIT_CLI, |
| IP_VS_SCTP_S_INIT_SER, |
| IP_VS_SCTP_S_INIT_ACK_CLI, |
| IP_VS_SCTP_S_INIT_ACK_SER, |
| IP_VS_SCTP_S_ECHO_CLI, |
| IP_VS_SCTP_S_ECHO_SER, |
| IP_VS_SCTP_S_ESTABLISHED, |
| IP_VS_SCTP_S_SHUT_CLI, |
| IP_VS_SCTP_S_SHUT_SER, |
| IP_VS_SCTP_S_SHUT_ACK_CLI, |
| IP_VS_SCTP_S_SHUT_ACK_SER, |
| IP_VS_SCTP_S_CLOSED, |
| IP_VS_SCTP_S_LAST |
| }; |
| |
| /* |
| * Delta sequence info structure |
| * Each ip_vs_conn has 2 (output AND input seq. changes). |
| * Only used in the VS/NAT. |
| */ |
| struct ip_vs_seq { |
| __u32 init_seq; /* Add delta from this seq */ |
| __u32 delta; /* Delta in sequence numbers */ |
| __u32 previous_delta; /* Delta in sequence numbers |
| before last resized pkt */ |
| }; |
| |
| /* |
| * counters per cpu |
| */ |
| struct ip_vs_counters { |
| __u32 conns; /* connections scheduled */ |
| __u32 inpkts; /* incoming packets */ |
| __u32 outpkts; /* outgoing packets */ |
| __u64 inbytes; /* incoming bytes */ |
| __u64 outbytes; /* outgoing bytes */ |
| }; |
| /* |
| * Stats per cpu |
| */ |
| struct ip_vs_cpu_stats { |
| struct ip_vs_counters ustats; |
| struct u64_stats_sync syncp; |
| }; |
| |
| /* |
| * IPVS statistics objects |
| */ |
| struct ip_vs_estimator { |
| struct list_head list; |
| |
| u64 last_inbytes; |
| u64 last_outbytes; |
| u32 last_conns; |
| u32 last_inpkts; |
| u32 last_outpkts; |
| |
| u32 cps; |
| u32 inpps; |
| u32 outpps; |
| u32 inbps; |
| u32 outbps; |
| }; |
| |
| struct ip_vs_stats { |
| struct ip_vs_stats_user ustats; /* statistics */ |
| struct ip_vs_estimator est; /* estimator */ |
| struct ip_vs_cpu_stats __percpu *cpustats; /* per cpu counters */ |
| spinlock_t lock; /* spin lock */ |
| struct ip_vs_stats_user ustats0; /* reset values */ |
| }; |
| |
| struct dst_entry; |
| struct iphdr; |
| struct ip_vs_conn; |
| struct ip_vs_app; |
| struct sk_buff; |
| struct ip_vs_proto_data; |
| |
| struct ip_vs_protocol { |
| struct ip_vs_protocol *next; |
| char *name; |
| u16 protocol; |
| u16 num_states; |
| int dont_defrag; |
| |
| void (*init)(struct ip_vs_protocol *pp); |
| |
| void (*exit)(struct ip_vs_protocol *pp); |
| |
| int (*init_netns)(struct net *net, struct ip_vs_proto_data *pd); |
| |
| void (*exit_netns)(struct net *net, struct ip_vs_proto_data *pd); |
| |
| int (*conn_schedule)(int af, struct sk_buff *skb, |
| struct ip_vs_proto_data *pd, |
| int *verdict, struct ip_vs_conn **cpp, |
| struct ip_vs_iphdr *iph); |
| |
| struct ip_vs_conn * |
| (*conn_in_get)(int af, |
| const struct sk_buff *skb, |
| const struct ip_vs_iphdr *iph, |
| int inverse); |
| |
| struct ip_vs_conn * |
| (*conn_out_get)(int af, |
| const struct sk_buff *skb, |
| const struct ip_vs_iphdr *iph, |
| int inverse); |
| |
| int (*snat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp, |
| struct ip_vs_conn *cp, struct ip_vs_iphdr *iph); |
| |
| int (*dnat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp, |
| struct ip_vs_conn *cp, struct ip_vs_iphdr *iph); |
| |
| int (*csum_check)(int af, struct sk_buff *skb, |
| struct ip_vs_protocol *pp); |
| |
| const char *(*state_name)(int state); |
| |
| void (*state_transition)(struct ip_vs_conn *cp, int direction, |
| const struct sk_buff *skb, |
| struct ip_vs_proto_data *pd); |
| |
| int (*register_app)(struct net *net, struct ip_vs_app *inc); |
| |
| void (*unregister_app)(struct net *net, struct ip_vs_app *inc); |
| |
| int (*app_conn_bind)(struct ip_vs_conn *cp); |
| |
| void (*debug_packet)(int af, struct ip_vs_protocol *pp, |
| const struct sk_buff *skb, |
| int offset, |
| const char *msg); |
| |
| void (*timeout_change)(struct ip_vs_proto_data *pd, int flags); |
| }; |
| |
| /* |
| * protocol data per netns |
| */ |
| struct ip_vs_proto_data { |
| struct ip_vs_proto_data *next; |
| struct ip_vs_protocol *pp; |
| int *timeout_table; /* protocol timeout table */ |
| atomic_t appcnt; /* counter of proto app incs. */ |
| struct tcp_states_t *tcp_state_table; |
| }; |
| |
| extern struct ip_vs_protocol *ip_vs_proto_get(unsigned short proto); |
| extern struct ip_vs_proto_data *ip_vs_proto_data_get(struct net *net, |
| unsigned short proto); |
| |
| struct ip_vs_conn_param { |
| struct net *net; |
| const union nf_inet_addr *caddr; |
| const union nf_inet_addr *vaddr; |
| __be16 cport; |
| __be16 vport; |
| __u16 protocol; |
| u16 af; |
| |
| const struct ip_vs_pe *pe; |
| char *pe_data; |
| __u8 pe_data_len; |
| }; |
| |
| /* |
| * IP_VS structure allocated for each dynamically scheduled connection |
| */ |
| struct ip_vs_conn { |
| struct hlist_node c_list; /* hashed list heads */ |
| #ifdef CONFIG_NET_NS |
| struct net *net; /* Name space */ |
| #endif |
| /* Protocol, addresses and port numbers */ |
| u16 af; /* address family */ |
| __be16 cport; |
| __be16 vport; |
| __be16 dport; |
| __u32 fwmark; /* Fire wall mark from skb */ |
| union nf_inet_addr caddr; /* client address */ |
| union nf_inet_addr vaddr; /* virtual address */ |
| union nf_inet_addr daddr; /* destination address */ |
| volatile __u32 flags; /* status flags */ |
| __u16 protocol; /* Which protocol (TCP/UDP) */ |
| |
| /* counter and timer */ |
| atomic_t refcnt; /* reference count */ |
| struct timer_list timer; /* Expiration timer */ |
| volatile unsigned long timeout; /* timeout */ |
| |
| /* Flags and state transition */ |
| spinlock_t lock; /* lock for state transition */ |
| volatile __u16 state; /* state info */ |
| volatile __u16 old_state; /* old state, to be used for |
| * state transition triggerd |
| * synchronization |
| */ |
| unsigned long sync_endtime; /* jiffies + sent_retries */ |
| |
| /* Control members */ |
| struct ip_vs_conn *control; /* Master control connection */ |
| atomic_t n_control; /* Number of controlled ones */ |
| struct ip_vs_dest *dest; /* real server */ |
| atomic_t in_pkts; /* incoming packet counter */ |
| |
| /* packet transmitter for different forwarding methods. If it |
| mangles the packet, it must return NF_DROP or better NF_STOLEN, |
| otherwise this must be changed to a sk_buff **. |
| NF_ACCEPT can be returned when destination is local. |
| */ |
| int (*packet_xmit)(struct sk_buff *skb, struct ip_vs_conn *cp, |
| struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); |
| |
| /* Note: we can group the following members into a structure, |
| in order to save more space, and the following members are |
| only used in VS/NAT anyway */ |
| struct ip_vs_app *app; /* bound ip_vs_app object */ |
| void *app_data; /* Application private data */ |
| struct ip_vs_seq in_seq; /* incoming seq. struct */ |
| struct ip_vs_seq out_seq; /* outgoing seq. struct */ |
| |
| const struct ip_vs_pe *pe; |
| char *pe_data; |
| __u8 pe_data_len; |
| }; |
| |
| /* |
| * To save some memory in conn table when name space is disabled. |
| */ |
| static inline struct net *ip_vs_conn_net(const struct ip_vs_conn *cp) |
| { |
| #ifdef CONFIG_NET_NS |
| return cp->net; |
| #else |
| return &init_net; |
| #endif |
| } |
| static inline void ip_vs_conn_net_set(struct ip_vs_conn *cp, struct net *net) |
| { |
| #ifdef CONFIG_NET_NS |
| cp->net = net; |
| #endif |
| } |
| |
| static inline int ip_vs_conn_net_eq(const struct ip_vs_conn *cp, |
| struct net *net) |
| { |
| #ifdef CONFIG_NET_NS |
| return cp->net == net; |
| #else |
| return 1; |
| #endif |
| } |
| |
| /* |
| * Extended internal versions of struct ip_vs_service_user and |
| * ip_vs_dest_user for IPv6 support. |
| * |
| * We need these to conveniently pass around service and destination |
| * options, but unfortunately, we also need to keep the old definitions to |
| * maintain userspace backwards compatibility for the setsockopt interface. |
| */ |
| struct ip_vs_service_user_kern { |
| /* virtual service addresses */ |
| u16 af; |
| u16 protocol; |
| union nf_inet_addr addr; /* virtual ip address */ |
| u16 port; |
| u32 fwmark; /* firwall mark of service */ |
| |
| /* virtual service options */ |
| char *sched_name; |
| char *pe_name; |
| unsigned int flags; /* virtual service flags */ |
| unsigned int timeout; /* persistent timeout in sec */ |
| u32 netmask; /* persistent netmask */ |
| }; |
| |
| |
| struct ip_vs_dest_user_kern { |
| /* destination server address */ |
| union nf_inet_addr addr; |
| u16 port; |
| |
| /* real server options */ |
| unsigned int conn_flags; /* connection flags */ |
| int weight; /* destination weight */ |
| |
| /* thresholds for active connections */ |
| u32 u_threshold; /* upper threshold */ |
| u32 l_threshold; /* lower threshold */ |
| }; |
| |
| |
| /* |
| * The information about the virtual service offered to the net |
| * and the forwarding entries |
| */ |
| struct ip_vs_service { |
| struct list_head s_list; /* for normal service table */ |
| struct list_head f_list; /* for fwmark-based service table */ |
| atomic_t refcnt; /* reference counter */ |
| atomic_t usecnt; /* use counter */ |
| |
| u16 af; /* address family */ |
| __u16 protocol; /* which protocol (TCP/UDP) */ |
| union nf_inet_addr addr; /* IP address for virtual service */ |
| __be16 port; /* port number for the service */ |
| __u32 fwmark; /* firewall mark of the service */ |
| unsigned int flags; /* service status flags */ |
| unsigned int timeout; /* persistent timeout in ticks */ |
| __be32 netmask; /* grouping granularity */ |
| struct net *net; |
| |
| struct list_head destinations; /* real server d-linked list */ |
| __u32 num_dests; /* number of servers */ |
| struct ip_vs_stats stats; /* statistics for the service */ |
| struct ip_vs_app *inc; /* bind conns to this app inc */ |
| |
| /* for scheduling */ |
| struct ip_vs_scheduler *scheduler; /* bound scheduler object */ |
| rwlock_t sched_lock; /* lock sched_data */ |
| void *sched_data; /* scheduler application data */ |
| |
| /* alternate persistence engine */ |
| struct ip_vs_pe *pe; |
| }; |
| |
| |
| /* |
| * The real server destination forwarding entry |
| * with ip address, port number, and so on. |
| */ |
| struct ip_vs_dest { |
| struct list_head n_list; /* for the dests in the service */ |
| struct list_head d_list; /* for table with all the dests */ |
| |
| u16 af; /* address family */ |
| __be16 port; /* port number of the server */ |
| union nf_inet_addr addr; /* IP address of the server */ |
| volatile unsigned int flags; /* dest status flags */ |
| atomic_t conn_flags; /* flags to copy to conn */ |
| atomic_t weight; /* server weight */ |
| |
| atomic_t refcnt; /* reference counter */ |
| struct ip_vs_stats stats; /* statistics */ |
| |
| /* connection counters and thresholds */ |
| atomic_t activeconns; /* active connections */ |
| atomic_t inactconns; /* inactive connections */ |
| atomic_t persistconns; /* persistent connections */ |
| __u32 u_threshold; /* upper threshold */ |
| __u32 l_threshold; /* lower threshold */ |
| |
| /* for destination cache */ |
| spinlock_t dst_lock; /* lock of dst_cache */ |
| struct dst_entry *dst_cache; /* destination cache entry */ |
| u32 dst_cookie; |
| union nf_inet_addr dst_saddr; |
| |
| /* for virtual service */ |
| struct ip_vs_service *svc; /* service it belongs to */ |
| __u16 protocol; /* which protocol (TCP/UDP) */ |
| __be16 vport; /* virtual port number */ |
| union nf_inet_addr vaddr; /* virtual IP address */ |
| __u32 vfwmark; /* firewall mark of service */ |
| }; |
| |
| |
| /* |
| * The scheduler object |
| */ |
| struct ip_vs_scheduler { |
| struct list_head n_list; /* d-linked list head */ |
| char *name; /* scheduler name */ |
| atomic_t refcnt; /* reference counter */ |
| struct module *module; /* THIS_MODULE/NULL */ |
| |
| /* scheduler initializing service */ |
| int (*init_service)(struct ip_vs_service *svc); |
| /* scheduling service finish */ |
| int (*done_service)(struct ip_vs_service *svc); |
| /* scheduler updating service */ |
| int (*update_service)(struct ip_vs_service *svc); |
| |
| /* selecting a server from the given service */ |
| struct ip_vs_dest* (*schedule)(struct ip_vs_service *svc, |
| const struct sk_buff *skb); |
| }; |
| |
| /* The persistence engine object */ |
| struct ip_vs_pe { |
| struct list_head n_list; /* d-linked list head */ |
| char *name; /* scheduler name */ |
| atomic_t refcnt; /* reference counter */ |
| struct module *module; /* THIS_MODULE/NULL */ |
| |
| /* get the connection template, if any */ |
| int (*fill_param)(struct ip_vs_conn_param *p, struct sk_buff *skb); |
| bool (*ct_match)(const struct ip_vs_conn_param *p, |
| struct ip_vs_conn *ct); |
| u32 (*hashkey_raw)(const struct ip_vs_conn_param *p, u32 initval, |
| bool inverse); |
| int (*show_pe_data)(const struct ip_vs_conn *cp, char *buf); |
| }; |
| |
| /* |
| * The application module object (a.k.a. app incarnation) |
| */ |
| struct ip_vs_app { |
| struct list_head a_list; /* member in app list */ |
| int type; /* IP_VS_APP_TYPE_xxx */ |
| char *name; /* application module name */ |
| __u16 protocol; |
| struct module *module; /* THIS_MODULE/NULL */ |
| struct list_head incs_list; /* list of incarnations */ |
| |
| /* members for application incarnations */ |
| struct list_head p_list; /* member in proto app list */ |
| struct ip_vs_app *app; /* its real application */ |
| __be16 port; /* port number in net order */ |
| atomic_t usecnt; /* usage counter */ |
| |
| /* |
| * output hook: Process packet in inout direction, diff set for TCP. |
| * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, |
| * 2=Mangled but checksum was not updated |
| */ |
| int (*pkt_out)(struct ip_vs_app *, struct ip_vs_conn *, |
| struct sk_buff *, int *diff); |
| |
| /* |
| * input hook: Process packet in outin direction, diff set for TCP. |
| * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, |
| * 2=Mangled but checksum was not updated |
| */ |
| int (*pkt_in)(struct ip_vs_app *, struct ip_vs_conn *, |
| struct sk_buff *, int *diff); |
| |
| /* ip_vs_app initializer */ |
| int (*init_conn)(struct ip_vs_app *, struct ip_vs_conn *); |
| |
| /* ip_vs_app finish */ |
| int (*done_conn)(struct ip_vs_app *, struct ip_vs_conn *); |
| |
| |
| /* not used now */ |
| int (*bind_conn)(struct ip_vs_app *, struct ip_vs_conn *, |
| struct ip_vs_protocol *); |
| |
| void (*unbind_conn)(struct ip_vs_app *, struct ip_vs_conn *); |
| |
| int * timeout_table; |
| int * timeouts; |
| int timeouts_size; |
| |
| int (*conn_schedule)(struct sk_buff *skb, struct ip_vs_app *app, |
| int *verdict, struct ip_vs_conn **cpp); |
| |
| struct ip_vs_conn * |
| (*conn_in_get)(const struct sk_buff *skb, struct ip_vs_app *app, |
| const struct iphdr *iph, int inverse); |
| |
| struct ip_vs_conn * |
| (*conn_out_get)(const struct sk_buff *skb, struct ip_vs_app *app, |
| const struct iphdr *iph, int inverse); |
| |
| int (*state_transition)(struct ip_vs_conn *cp, int direction, |
| const struct sk_buff *skb, |
| struct ip_vs_app *app); |
| |
| void (*timeout_change)(struct ip_vs_app *app, int flags); |
| }; |
| |
| struct ipvs_master_sync_state { |
| struct list_head sync_queue; |
| struct ip_vs_sync_buff *sync_buff; |
| int sync_queue_len; |
| unsigned int sync_queue_delay; |
| struct task_struct *master_thread; |
| struct delayed_work master_wakeup_work; |
| struct netns_ipvs *ipvs; |
| }; |
| |
| /* IPVS in network namespace */ |
| struct netns_ipvs { |
| int gen; /* Generation */ |
| int enable; /* enable like nf_hooks do */ |
| /* |
| * Hash table: for real service lookups |
| */ |
| #define IP_VS_RTAB_BITS 4 |
| #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS) |
| #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1) |
| |
| struct list_head rs_table[IP_VS_RTAB_SIZE]; |
| /* ip_vs_app */ |
| struct list_head app_list; |
| /* ip_vs_proto */ |
| #define IP_VS_PROTO_TAB_SIZE 32 /* must be power of 2 */ |
| struct ip_vs_proto_data *proto_data_table[IP_VS_PROTO_TAB_SIZE]; |
| /* ip_vs_proto_tcp */ |
| #ifdef CONFIG_IP_VS_PROTO_TCP |
| #define TCP_APP_TAB_BITS 4 |
| #define TCP_APP_TAB_SIZE (1 << TCP_APP_TAB_BITS) |
| #define TCP_APP_TAB_MASK (TCP_APP_TAB_SIZE - 1) |
| struct list_head tcp_apps[TCP_APP_TAB_SIZE]; |
| spinlock_t tcp_app_lock; |
| #endif |
| /* ip_vs_proto_udp */ |
| #ifdef CONFIG_IP_VS_PROTO_UDP |
| #define UDP_APP_TAB_BITS 4 |
| #define UDP_APP_TAB_SIZE (1 << UDP_APP_TAB_BITS) |
| #define UDP_APP_TAB_MASK (UDP_APP_TAB_SIZE - 1) |
| struct list_head udp_apps[UDP_APP_TAB_SIZE]; |
| spinlock_t udp_app_lock; |
| #endif |
| /* ip_vs_proto_sctp */ |
| #ifdef CONFIG_IP_VS_PROTO_SCTP |
| #define SCTP_APP_TAB_BITS 4 |
| #define SCTP_APP_TAB_SIZE (1 << SCTP_APP_TAB_BITS) |
| #define SCTP_APP_TAB_MASK (SCTP_APP_TAB_SIZE - 1) |
| /* Hash table for SCTP application incarnations */ |
| struct list_head sctp_apps[SCTP_APP_TAB_SIZE]; |
| spinlock_t sctp_app_lock; |
| #endif |
| /* ip_vs_conn */ |
| atomic_t conn_count; /* connection counter */ |
| |
| /* ip_vs_ctl */ |
| struct ip_vs_stats tot_stats; /* Statistics & est. */ |
| |
| int num_services; /* no of virtual services */ |
| |
| rwlock_t rs_lock; /* real services table */ |
| /* Trash for destinations */ |
| struct list_head dest_trash; |
| /* Service counters */ |
| atomic_t ftpsvc_counter; |
| atomic_t nullsvc_counter; |
| |
| #ifdef CONFIG_SYSCTL |
| /* 1/rate drop and drop-entry variables */ |
| struct delayed_work defense_work; /* Work handler */ |
| int drop_rate; |
| int drop_counter; |
| atomic_t dropentry; |
| /* locks in ctl.c */ |
| spinlock_t dropentry_lock; /* drop entry handling */ |
| spinlock_t droppacket_lock; /* drop packet handling */ |
| spinlock_t securetcp_lock; /* state and timeout tables */ |
| |
| /* sys-ctl struct */ |
| struct ctl_table_header *sysctl_hdr; |
| struct ctl_table *sysctl_tbl; |
| #endif |
| |
| /* sysctl variables */ |
| int sysctl_amemthresh; |
| int sysctl_am_droprate; |
| int sysctl_drop_entry; |
| int sysctl_drop_packet; |
| int sysctl_secure_tcp; |
| #ifdef CONFIG_IP_VS_NFCT |
| int sysctl_conntrack; |
| #endif |
| int sysctl_snat_reroute; |
| int sysctl_sync_ver; |
| int sysctl_sync_ports; |
| int sysctl_sync_qlen_max; |
| int sysctl_sync_sock_size; |
| int sysctl_cache_bypass; |
| int sysctl_expire_nodest_conn; |
| int sysctl_expire_quiescent_template; |
| int sysctl_sync_threshold[2]; |
| unsigned int sysctl_sync_refresh_period; |
| int sysctl_sync_retries; |
| int sysctl_nat_icmp_send; |
| int sysctl_pmtu_disc; |
| int sysctl_backup_only; |
| |
| /* ip_vs_lblc */ |
| int sysctl_lblc_expiration; |
| struct ctl_table_header *lblc_ctl_header; |
| struct ctl_table *lblc_ctl_table; |
| /* ip_vs_lblcr */ |
| int sysctl_lblcr_expiration; |
| struct ctl_table_header *lblcr_ctl_header; |
| struct ctl_table *lblcr_ctl_table; |
| /* ip_vs_est */ |
| struct list_head est_list; /* estimator list */ |
| spinlock_t est_lock; |
| struct timer_list est_timer; /* Estimation timer */ |
| /* ip_vs_sync */ |
| spinlock_t sync_lock; |
| struct ipvs_master_sync_state *ms; |
| spinlock_t sync_buff_lock; |
| struct task_struct **backup_threads; |
| int threads_mask; |
| int send_mesg_maxlen; |
| int recv_mesg_maxlen; |
| volatile int sync_state; |
| volatile int master_syncid; |
| volatile int backup_syncid; |
| struct mutex sync_mutex; |
| /* multicast interface name */ |
| char master_mcast_ifn[IP_VS_IFNAME_MAXLEN]; |
| char backup_mcast_ifn[IP_VS_IFNAME_MAXLEN]; |
| /* net name space ptr */ |
| struct net *net; /* Needed by timer routines */ |
| }; |
| |
| #define DEFAULT_SYNC_THRESHOLD 3 |
| #define DEFAULT_SYNC_PERIOD 50 |
| #define DEFAULT_SYNC_VER 1 |
| #define DEFAULT_SYNC_REFRESH_PERIOD (0U * HZ) |
| #define DEFAULT_SYNC_RETRIES 0 |
| #define IPVS_SYNC_WAKEUP_RATE 8 |
| #define IPVS_SYNC_QLEN_MAX (IPVS_SYNC_WAKEUP_RATE * 4) |
| #define IPVS_SYNC_SEND_DELAY (HZ / 50) |
| #define IPVS_SYNC_CHECK_PERIOD HZ |
| #define IPVS_SYNC_FLUSH_TIME (HZ * 2) |
| #define IPVS_SYNC_PORTS_MAX (1 << 6) |
| |
| #ifdef CONFIG_SYSCTL |
| |
| static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs) |
| { |
| return ipvs->sysctl_sync_threshold[0]; |
| } |
| |
| static inline int sysctl_sync_period(struct netns_ipvs *ipvs) |
| { |
| return ACCESS_ONCE(ipvs->sysctl_sync_threshold[1]); |
| } |
| |
| static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs) |
| { |
| return ACCESS_ONCE(ipvs->sysctl_sync_refresh_period); |
| } |
| |
| static inline int sysctl_sync_retries(struct netns_ipvs *ipvs) |
| { |
| return ipvs->sysctl_sync_retries; |
| } |
| |
| static inline int sysctl_sync_ver(struct netns_ipvs *ipvs) |
| { |
| return ipvs->sysctl_sync_ver; |
| } |
| |
| static inline int sysctl_sync_ports(struct netns_ipvs *ipvs) |
| { |
| return ACCESS_ONCE(ipvs->sysctl_sync_ports); |
| } |
| |
| static inline int sysctl_sync_qlen_max(struct netns_ipvs *ipvs) |
| { |
| return ipvs->sysctl_sync_qlen_max; |
| } |
| |
| static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs) |
| { |
| return ipvs->sysctl_sync_sock_size; |
| } |
| |
| static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs) |
| { |
| return ipvs->sysctl_pmtu_disc; |
| } |
| |
| static inline int sysctl_backup_only(struct netns_ipvs *ipvs) |
| { |
| return ipvs->sync_state & IP_VS_STATE_BACKUP && |
| ipvs->sysctl_backup_only; |
| } |
| |
| #else |
| |
| static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs) |
| { |
| return DEFAULT_SYNC_THRESHOLD; |
| } |
| |
| static inline int sysctl_sync_period(struct netns_ipvs *ipvs) |
| { |
| return DEFAULT_SYNC_PERIOD; |
| } |
| |
| static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs) |
| { |
| return DEFAULT_SYNC_REFRESH_PERIOD; |
| } |
| |
| static inline int sysctl_sync_retries(struct netns_ipvs *ipvs) |
| { |
| return DEFAULT_SYNC_RETRIES & 3; |
| } |
| |
| static inline int sysctl_sync_ver(struct netns_ipvs *ipvs) |
| { |
| return DEFAULT_SYNC_VER; |
| } |
| |
| static inline int sysctl_sync_ports(struct netns_ipvs *ipvs) |
| { |
| return 1; |
| } |
| |
| static inline int sysctl_sync_qlen_max(struct netns_ipvs *ipvs) |
| { |
| return IPVS_SYNC_QLEN_MAX; |
| } |
| |
| static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs) |
| { |
| return 0; |
| } |
| |
| static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs) |
| { |
| return 1; |
| } |
| |
| static inline int sysctl_backup_only(struct netns_ipvs *ipvs) |
| { |
| return 0; |
| } |
| |
| #endif |
| |
| /* |
| * IPVS core functions |
| * (from ip_vs_core.c) |
| */ |
| extern const char *ip_vs_proto_name(unsigned int proto); |
| extern void ip_vs_init_hash_table(struct list_head *table, int rows); |
| #define IP_VS_INIT_HASH_TABLE(t) ip_vs_init_hash_table((t), ARRAY_SIZE((t))) |
| |
| #define IP_VS_APP_TYPE_FTP 1 |
| |
| /* |
| * ip_vs_conn handling functions |
| * (from ip_vs_conn.c) |
| */ |
| |
| enum { |
| IP_VS_DIR_INPUT = 0, |
| IP_VS_DIR_OUTPUT, |
| IP_VS_DIR_INPUT_ONLY, |
| IP_VS_DIR_LAST, |
| }; |
| |
| static inline void ip_vs_conn_fill_param(struct net *net, int af, int protocol, |
| const union nf_inet_addr *caddr, |
| __be16 cport, |
| const union nf_inet_addr *vaddr, |
| __be16 vport, |
| struct ip_vs_conn_param *p) |
| { |
| p->net = net; |
| p->af = af; |
| p->protocol = protocol; |
| p->caddr = caddr; |
| p->cport = cport; |
| p->vaddr = vaddr; |
| p->vport = vport; |
| p->pe = NULL; |
| p->pe_data = NULL; |
| } |
| |
| struct ip_vs_conn *ip_vs_conn_in_get(const struct ip_vs_conn_param *p); |
| struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p); |
| |
| struct ip_vs_conn * ip_vs_conn_in_get_proto(int af, const struct sk_buff *skb, |
| const struct ip_vs_iphdr *iph, |
| int inverse); |
| |
| struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p); |
| |
| struct ip_vs_conn * ip_vs_conn_out_get_proto(int af, const struct sk_buff *skb, |
| const struct ip_vs_iphdr *iph, |
| int inverse); |
| |
| /* put back the conn without restarting its timer */ |
| static inline void __ip_vs_conn_put(struct ip_vs_conn *cp) |
| { |
| atomic_dec(&cp->refcnt); |
| } |
| extern void ip_vs_conn_put(struct ip_vs_conn *cp); |
| extern void ip_vs_conn_fill_cport(struct ip_vs_conn *cp, __be16 cport); |
| |
| struct ip_vs_conn *ip_vs_conn_new(const struct ip_vs_conn_param *p, |
| const union nf_inet_addr *daddr, |
| __be16 dport, unsigned int flags, |
| struct ip_vs_dest *dest, __u32 fwmark); |
| extern void ip_vs_conn_expire_now(struct ip_vs_conn *cp); |
| |
| extern const char * ip_vs_state_name(__u16 proto, int state); |
| |
| extern void ip_vs_tcp_conn_listen(struct net *net, struct ip_vs_conn *cp); |
| extern int ip_vs_check_template(struct ip_vs_conn *ct); |
| extern void ip_vs_random_dropentry(struct net *net); |
| extern int ip_vs_conn_init(void); |
| extern void ip_vs_conn_cleanup(void); |
| |
| static inline void ip_vs_control_del(struct ip_vs_conn *cp) |
| { |
| struct ip_vs_conn *ctl_cp = cp->control; |
| if (!ctl_cp) { |
| IP_VS_ERR_BUF("request control DEL for uncontrolled: " |
| "%s:%d to %s:%d\n", |
| IP_VS_DBG_ADDR(cp->af, &cp->caddr), |
| ntohs(cp->cport), |
| IP_VS_DBG_ADDR(cp->af, &cp->vaddr), |
| ntohs(cp->vport)); |
| |
| return; |
| } |
| |
| IP_VS_DBG_BUF(7, "DELeting control for: " |
| "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", |
| IP_VS_DBG_ADDR(cp->af, &cp->caddr), |
| ntohs(cp->cport), |
| IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), |
| ntohs(ctl_cp->cport)); |
| |
| cp->control = NULL; |
| if (atomic_read(&ctl_cp->n_control) == 0) { |
| IP_VS_ERR_BUF("BUG control DEL with n=0 : " |
| "%s:%d to %s:%d\n", |
| IP_VS_DBG_ADDR(cp->af, &cp->caddr), |
| ntohs(cp->cport), |
| IP_VS_DBG_ADDR(cp->af, &cp->vaddr), |
| ntohs(cp->vport)); |
| |
| return; |
| } |
| atomic_dec(&ctl_cp->n_control); |
| } |
| |
| static inline void |
| ip_vs_control_add(struct ip_vs_conn *cp, struct ip_vs_conn *ctl_cp) |
| { |
| if (cp->control) { |
| IP_VS_ERR_BUF("request control ADD for already controlled: " |
| "%s:%d to %s:%d\n", |
| IP_VS_DBG_ADDR(cp->af, &cp->caddr), |
| ntohs(cp->cport), |
| IP_VS_DBG_ADDR(cp->af, &cp->vaddr), |
| ntohs(cp->vport)); |
| |
| ip_vs_control_del(cp); |
| } |
| |
| IP_VS_DBG_BUF(7, "ADDing control for: " |
| "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", |
| IP_VS_DBG_ADDR(cp->af, &cp->caddr), |
| ntohs(cp->cport), |
| IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), |
| ntohs(ctl_cp->cport)); |
| |
| cp->control = ctl_cp; |
| atomic_inc(&ctl_cp->n_control); |
| } |
| |
| /* |
| * IPVS netns init & cleanup functions |
| */ |
| extern int ip_vs_estimator_net_init(struct net *net); |
| extern int ip_vs_control_net_init(struct net *net); |
| extern int ip_vs_protocol_net_init(struct net *net); |
| extern int ip_vs_app_net_init(struct net *net); |
| extern int ip_vs_conn_net_init(struct net *net); |
| extern int ip_vs_sync_net_init(struct net *net); |
| extern void ip_vs_conn_net_cleanup(struct net *net); |
| extern void ip_vs_app_net_cleanup(struct net *net); |
| extern void ip_vs_protocol_net_cleanup(struct net *net); |
| extern void ip_vs_control_net_cleanup(struct net *net); |
| extern void ip_vs_estimator_net_cleanup(struct net *net); |
| extern void ip_vs_sync_net_cleanup(struct net *net); |
| extern void ip_vs_service_net_cleanup(struct net *net); |
| |
| /* |
| * IPVS application functions |
| * (from ip_vs_app.c) |
| */ |
| #define IP_VS_APP_MAX_PORTS 8 |
| extern struct ip_vs_app *register_ip_vs_app(struct net *net, |
| struct ip_vs_app *app); |
| extern void unregister_ip_vs_app(struct net *net, struct ip_vs_app *app); |
| extern int ip_vs_bind_app(struct ip_vs_conn *cp, struct ip_vs_protocol *pp); |
| extern void ip_vs_unbind_app(struct ip_vs_conn *cp); |
| extern int register_ip_vs_app_inc(struct net *net, struct ip_vs_app *app, |
| __u16 proto, __u16 port); |
| extern int ip_vs_app_inc_get(struct ip_vs_app *inc); |
| extern void ip_vs_app_inc_put(struct ip_vs_app *inc); |
| |
| extern int ip_vs_app_pkt_out(struct ip_vs_conn *, struct sk_buff *skb); |
| extern int ip_vs_app_pkt_in(struct ip_vs_conn *, struct sk_buff *skb); |
| |
| void ip_vs_bind_pe(struct ip_vs_service *svc, struct ip_vs_pe *pe); |
| void ip_vs_unbind_pe(struct ip_vs_service *svc); |
| int register_ip_vs_pe(struct ip_vs_pe *pe); |
| int unregister_ip_vs_pe(struct ip_vs_pe *pe); |
| struct ip_vs_pe *ip_vs_pe_getbyname(const char *name); |
| struct ip_vs_pe *__ip_vs_pe_getbyname(const char *pe_name); |
| |
| /* |
| * Use a #define to avoid all of module.h just for these trivial ops |
| */ |
| #define ip_vs_pe_get(pe) \ |
| if (pe && pe->module) \ |
| __module_get(pe->module); |
| |
| #define ip_vs_pe_put(pe) \ |
| if (pe && pe->module) \ |
| module_put(pe->module); |
| |
| /* |
| * IPVS protocol functions (from ip_vs_proto.c) |
| */ |
| extern int ip_vs_protocol_init(void); |
| extern void ip_vs_protocol_cleanup(void); |
| extern void ip_vs_protocol_timeout_change(struct netns_ipvs *ipvs, int flags); |
| extern int *ip_vs_create_timeout_table(int *table, int size); |
| extern int |
| ip_vs_set_state_timeout(int *table, int num, const char *const *names, |
| const char *name, int to); |
| extern void |
| ip_vs_tcpudp_debug_packet(int af, struct ip_vs_protocol *pp, |
| const struct sk_buff *skb, |
| int offset, const char *msg); |
| |
| extern struct ip_vs_protocol ip_vs_protocol_tcp; |
| extern struct ip_vs_protocol ip_vs_protocol_udp; |
| extern struct ip_vs_protocol ip_vs_protocol_icmp; |
| extern struct ip_vs_protocol ip_vs_protocol_esp; |
| extern struct ip_vs_protocol ip_vs_protocol_ah; |
| extern struct ip_vs_protocol ip_vs_protocol_sctp; |
| |
| /* |
| * Registering/unregistering scheduler functions |
| * (from ip_vs_sched.c) |
| */ |
| extern int register_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); |
| extern int unregister_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); |
| extern int ip_vs_bind_scheduler(struct ip_vs_service *svc, |
| struct ip_vs_scheduler *scheduler); |
| extern int ip_vs_unbind_scheduler(struct ip_vs_service *svc); |
| extern struct ip_vs_scheduler *ip_vs_scheduler_get(const char *sched_name); |
| extern void ip_vs_scheduler_put(struct ip_vs_scheduler *scheduler); |
| extern struct ip_vs_conn * |
| ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb, |
| struct ip_vs_proto_data *pd, int *ignored, |
| struct ip_vs_iphdr *iph); |
| extern int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb, |
| struct ip_vs_proto_data *pd, struct ip_vs_iphdr *iph); |
| |
| extern void ip_vs_scheduler_err(struct ip_vs_service *svc, const char *msg); |
| |
| |
| /* |
| * IPVS control data and functions (from ip_vs_ctl.c) |
| */ |
| extern struct ip_vs_stats ip_vs_stats; |
| extern int sysctl_ip_vs_sync_ver; |
| |
| extern struct ip_vs_service * |
| ip_vs_service_get(struct net *net, int af, __u32 fwmark, __u16 protocol, |
| const union nf_inet_addr *vaddr, __be16 vport); |
| |
| static inline void ip_vs_service_put(struct ip_vs_service *svc) |
| { |
| atomic_dec(&svc->usecnt); |
| } |
| |
| extern struct ip_vs_dest * |
| ip_vs_lookup_real_service(struct net *net, int af, __u16 protocol, |
| const union nf_inet_addr *daddr, __be16 dport); |
| |
| extern int ip_vs_use_count_inc(void); |
| extern void ip_vs_use_count_dec(void); |
| extern int ip_vs_register_nl_ioctl(void); |
| extern void ip_vs_unregister_nl_ioctl(void); |
| extern int ip_vs_control_init(void); |
| extern void ip_vs_control_cleanup(void); |
| extern struct ip_vs_dest * |
| ip_vs_find_dest(struct net *net, int af, const union nf_inet_addr *daddr, |
| __be16 dport, const union nf_inet_addr *vaddr, __be16 vport, |
| __u16 protocol, __u32 fwmark, __u32 flags); |
| extern struct ip_vs_dest *ip_vs_try_bind_dest(struct ip_vs_conn *cp); |
| |
| |
| /* |
| * IPVS sync daemon data and function prototypes |
| * (from ip_vs_sync.c) |
| */ |
| extern int start_sync_thread(struct net *net, int state, char *mcast_ifn, |
| __u8 syncid); |
| extern int stop_sync_thread(struct net *net, int state); |
| extern void ip_vs_sync_conn(struct net *net, struct ip_vs_conn *cp, int pkts); |
| |
| |
| /* |
| * IPVS rate estimator prototypes (from ip_vs_est.c) |
| */ |
| extern void ip_vs_start_estimator(struct net *net, struct ip_vs_stats *stats); |
| extern void ip_vs_stop_estimator(struct net *net, struct ip_vs_stats *stats); |
| extern void ip_vs_zero_estimator(struct ip_vs_stats *stats); |
| extern void ip_vs_read_estimator(struct ip_vs_stats_user *dst, |
| struct ip_vs_stats *stats); |
| |
| /* |
| * Various IPVS packet transmitters (from ip_vs_xmit.c) |
| */ |
| extern int ip_vs_null_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, |
| struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); |
| extern int ip_vs_bypass_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, |
| struct ip_vs_protocol *pp, |
| struct ip_vs_iphdr *iph); |
| extern int ip_vs_nat_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, |
| struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); |
| extern int ip_vs_tunnel_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, |
| struct ip_vs_protocol *pp, |
| struct ip_vs_iphdr *iph); |
| extern int ip_vs_dr_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, |
| struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); |
| extern int ip_vs_icmp_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, |
| struct ip_vs_protocol *pp, int offset, |
| unsigned int hooknum, struct ip_vs_iphdr *iph); |
| |
| #ifdef CONFIG_IP_VS_IPV6 |
| extern int ip_vs_bypass_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, |
| struct ip_vs_protocol *pp, |
| struct ip_vs_iphdr *iph); |
| extern int ip_vs_nat_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, |
| struct ip_vs_protocol *pp, |
| struct ip_vs_iphdr *iph); |
| extern int ip_vs_tunnel_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, |
| struct ip_vs_protocol *pp, |
| struct ip_vs_iphdr *iph); |
| extern int ip_vs_dr_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, |
| struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); |
| extern int ip_vs_icmp_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, |
| struct ip_vs_protocol *pp, int offset, |
| unsigned int hooknum, struct ip_vs_iphdr *iph); |
| #endif |
| |
| #ifdef CONFIG_SYSCTL |
| /* |
| * This is a simple mechanism to ignore packets when |
| * we are loaded. Just set ip_vs_drop_rate to 'n' and |
| * we start to drop 1/rate of the packets |
| */ |
| |
| static inline int ip_vs_todrop(struct netns_ipvs *ipvs) |
| { |
| if (!ipvs->drop_rate) |
| return 0; |
| if (--ipvs->drop_counter > 0) |
| return 0; |
| ipvs->drop_counter = ipvs->drop_rate; |
| return 1; |
| } |
| #else |
| static inline int ip_vs_todrop(struct netns_ipvs *ipvs) { return 0; } |
| #endif |
| |
| /* |
| * ip_vs_fwd_tag returns the forwarding tag of the connection |
| */ |
| #define IP_VS_FWD_METHOD(cp) (cp->flags & IP_VS_CONN_F_FWD_MASK) |
| |
| static inline char ip_vs_fwd_tag(struct ip_vs_conn *cp) |
| { |
| char fwd; |
| |
| switch (IP_VS_FWD_METHOD(cp)) { |
| case IP_VS_CONN_F_MASQ: |
| fwd = 'M'; break; |
| case IP_VS_CONN_F_LOCALNODE: |
| fwd = 'L'; break; |
| case IP_VS_CONN_F_TUNNEL: |
| fwd = 'T'; break; |
| case IP_VS_CONN_F_DROUTE: |
| fwd = 'R'; break; |
| case IP_VS_CONN_F_BYPASS: |
| fwd = 'B'; break; |
| default: |
| fwd = '?'; break; |
| } |
| return fwd; |
| } |
| |
| extern void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp, |
| struct ip_vs_conn *cp, int dir); |
| |
| #ifdef CONFIG_IP_VS_IPV6 |
| extern void ip_vs_nat_icmp_v6(struct sk_buff *skb, struct ip_vs_protocol *pp, |
| struct ip_vs_conn *cp, int dir); |
| #endif |
| |
| extern __sum16 ip_vs_checksum_complete(struct sk_buff *skb, int offset); |
| |
| static inline __wsum ip_vs_check_diff4(__be32 old, __be32 new, __wsum oldsum) |
| { |
| __be32 diff[2] = { ~old, new }; |
| |
| return csum_partial(diff, sizeof(diff), oldsum); |
| } |
| |
| #ifdef CONFIG_IP_VS_IPV6 |
| static inline __wsum ip_vs_check_diff16(const __be32 *old, const __be32 *new, |
| __wsum oldsum) |
| { |
| __be32 diff[8] = { ~old[3], ~old[2], ~old[1], ~old[0], |
| new[3], new[2], new[1], new[0] }; |
| |
| return csum_partial(diff, sizeof(diff), oldsum); |
| } |
| #endif |
| |
| static inline __wsum ip_vs_check_diff2(__be16 old, __be16 new, __wsum oldsum) |
| { |
| __be16 diff[2] = { ~old, new }; |
| |
| return csum_partial(diff, sizeof(diff), oldsum); |
| } |
| |
| /* |
| * Forget current conntrack (unconfirmed) and attach notrack entry |
| */ |
| static inline void ip_vs_notrack(struct sk_buff *skb) |
| { |
| #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) |
| enum ip_conntrack_info ctinfo; |
| struct nf_conn *ct = nf_ct_get(skb, &ctinfo); |
| |
| if (!ct || !nf_ct_is_untracked(ct)) { |
| nf_conntrack_put(skb->nfct); |
| skb->nfct = &nf_ct_untracked_get()->ct_general; |
| skb->nfctinfo = IP_CT_NEW; |
| nf_conntrack_get(skb->nfct); |
| } |
| #endif |
| } |
| |
| #ifdef CONFIG_IP_VS_NFCT |
| /* |
| * Netfilter connection tracking |
| * (from ip_vs_nfct.c) |
| */ |
| static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs) |
| { |
| #ifdef CONFIG_SYSCTL |
| return ipvs->sysctl_conntrack; |
| #else |
| return 0; |
| #endif |
| } |
| |
| extern void ip_vs_update_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp, |
| int outin); |
| extern int ip_vs_confirm_conntrack(struct sk_buff *skb); |
| extern void ip_vs_nfct_expect_related(struct sk_buff *skb, struct nf_conn *ct, |
| struct ip_vs_conn *cp, u_int8_t proto, |
| const __be16 port, int from_rs); |
| extern void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp); |
| |
| #else |
| |
| static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs) |
| { |
| return 0; |
| } |
| |
| static inline void ip_vs_update_conntrack(struct sk_buff *skb, |
| struct ip_vs_conn *cp, int outin) |
| { |
| } |
| |
| static inline int ip_vs_confirm_conntrack(struct sk_buff *skb) |
| { |
| return NF_ACCEPT; |
| } |
| |
| static inline void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp) |
| { |
| } |
| /* CONFIG_IP_VS_NFCT */ |
| #endif |
| |
| static inline unsigned int |
| ip_vs_dest_conn_overhead(struct ip_vs_dest *dest) |
| { |
| /* |
| * We think the overhead of processing active connections is 256 |
| * times higher than that of inactive connections in average. (This |
| * 256 times might not be accurate, we will change it later) We |
| * use the following formula to estimate the overhead now: |
| * dest->activeconns*256 + dest->inactconns |
| */ |
| return (atomic_read(&dest->activeconns) << 8) + |
| atomic_read(&dest->inactconns); |
| } |
| |
| #endif /* _NET_IP_VS_H */ |