![Lin Ming](/assets/img/avatar_default.png)
IPVS should not reset skb->nf_bridge in FORWARD hook by calling nf_reset for NAT replies. It triggers oops in br_nf_forward_finish. [ 579.781508] BUG: unable to handle kernel NULL pointer dereference at 0000000000000004 [ 579.781669] IP: [<ffffffff817b1ca5>] br_nf_forward_finish+0x58/0x112 [ 579.781792] PGD 218f9067 PUD 0 [ 579.781865] Oops: 0000 [#1] SMP [ 579.781945] CPU 0 [ 579.781983] Modules linked in: [ 579.782047] [ 579.782080] [ 579.782114] Pid: 4644, comm: qemu Tainted: G W 3.5.0-rc5-00006-g95e69f9 #282 Hewlett-Packard /30E8 [ 579.782300] RIP: 0010:[<ffffffff817b1ca5>] [<ffffffff817b1ca5>] br_nf_forward_finish+0x58/0x112 [ 579.782455] RSP: 0018:ffff88007b003a98 EFLAGS: 00010287 [ 579.782541] RAX: 0000000000000008 RBX: ffff8800762ead00 RCX: 000000000001670a [ 579.782653] RDX: 0000000000000000 RSI: 000000000000000a RDI: ffff8800762ead00 [ 579.782845] RBP: ffff88007b003ac8 R08: 0000000000016630 R09: ffff88007b003a90 [ 579.782957] R10: ffff88007b0038e8 R11: ffff88002da37540 R12: ffff88002da01a02 [ 579.783066] R13: ffff88002da01a80 R14: ffff88002d83c000 R15: ffff88002d82a000 [ 579.783177] FS: 0000000000000000(0000) GS:ffff88007b000000(0063) knlGS:00000000f62d1b70 [ 579.783306] CS: 0010 DS: 002b ES: 002b CR0: 000000008005003b [ 579.783395] CR2: 0000000000000004 CR3: 00000000218fe000 CR4: 00000000000027f0 [ 579.783505] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 579.783684] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 579.783795] Process qemu (pid: 4644, threadinfo ffff880021b20000, task ffff880021aba760) [ 579.783919] Stack: [ 579.783959] ffff88007693cedc ffff8800762ead00 ffff88002da01a02 ffff8800762ead00 [ 579.784110] ffff88002da01a02 ffff88002da01a80 ffff88007b003b18 ffffffff817b26c7 [ 579.784260] ffff880080000000 ffffffff81ef59f0 ffff8800762ead00 ffffffff81ef58b0 [ 579.784477] Call Trace: [ 579.784523] <IRQ> [ 579.784562] [ 579.784603] [<ffffffff817b26c7>] br_nf_forward_ip+0x275/0x2c8 [ 579.784707] [<ffffffff81704b58>] nf_iterate+0x47/0x7d [ 579.784797] [<ffffffff817ac32e>] ? br_dev_queue_push_xmit+0xae/0xae [ 579.784906] [<ffffffff81704bfb>] nf_hook_slow+0x6d/0x102 [ 579.784995] [<ffffffff817ac32e>] ? br_dev_queue_push_xmit+0xae/0xae [ 579.785175] [<ffffffff8187fa95>] ? _raw_write_unlock_bh+0x19/0x1b [ 579.785179] [<ffffffff817ac417>] __br_forward+0x97/0xa2 [ 579.785179] [<ffffffff817ad366>] br_handle_frame_finish+0x1a6/0x257 [ 579.785179] [<ffffffff817b2386>] br_nf_pre_routing_finish+0x26d/0x2cb [ 579.785179] [<ffffffff817b2cf0>] br_nf_pre_routing+0x55d/0x5c1 [ 579.785179] [<ffffffff81704b58>] nf_iterate+0x47/0x7d [ 579.785179] [<ffffffff817ad1c0>] ? br_handle_local_finish+0x44/0x44 [ 579.785179] [<ffffffff81704bfb>] nf_hook_slow+0x6d/0x102 [ 579.785179] [<ffffffff817ad1c0>] ? br_handle_local_finish+0x44/0x44 [ 579.785179] [<ffffffff81551525>] ? sky2_poll+0xb35/0xb54 [ 579.785179] [<ffffffff817ad62a>] br_handle_frame+0x213/0x229 [ 579.785179] [<ffffffff817ad417>] ? br_handle_frame_finish+0x257/0x257 [ 579.785179] [<ffffffff816e3b47>] __netif_receive_skb+0x2b4/0x3f1 [ 579.785179] [<ffffffff816e69fc>] process_backlog+0x99/0x1e2 [ 579.785179] [<ffffffff816e6800>] net_rx_action+0xdf/0x242 [ 579.785179] [<ffffffff8107e8a8>] __do_softirq+0xc1/0x1e0 [ 579.785179] [<ffffffff8135a5ba>] ? trace_hardirqs_off_thunk+0x3a/0x6c [ 579.785179] [<ffffffff8188812c>] call_softirq+0x1c/0x30 The steps to reproduce as follow, 1. On Host1, setup brige br0(192.168.1.106) 2. Boot a kvm guest(192.168.1.105) on Host1 and start httpd 3. Start IPVS service on Host1 ipvsadm -A -t 192.168.1.106:80 -s rr ipvsadm -a -t 192.168.1.106:80 -r 192.168.1.105:80 -m 4. Run apache benchmark on Host2(192.168.1.101) ab -n 1000 http://192.168.1.106/ ip_vs_reply4 ip_vs_out handle_response ip_vs_notrack nf_reset() { skb->nf_bridge = NULL; } Actually, IPVS wants in this case just to replace nfct with untracked version. So replace the nf_reset(skb) call in ip_vs_notrack() with a nf_conntrack_put(skb->nfct) call. Signed-off-by: Lin Ming <mlin@ss.pku.edu.cn> Signed-off-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Simon Horman <horms@verge.net.au> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
1496 lines
42 KiB
C
1496 lines
42 KiB
C
/*
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* IP Virtual Server
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* data structure and functionality definitions
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*/
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#ifndef _NET_IP_VS_H
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#define _NET_IP_VS_H
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#include <linux/ip_vs.h> /* definitions shared with userland */
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#include <asm/types.h> /* for __uXX types */
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#include <linux/list.h> /* for struct list_head */
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#include <linux/spinlock.h> /* for struct rwlock_t */
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#include <linux/atomic.h> /* for struct atomic_t */
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#include <linux/compiler.h>
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#include <linux/timer.h>
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#include <linux/bug.h>
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#include <net/checksum.h>
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#include <linux/netfilter.h> /* for union nf_inet_addr */
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#include <linux/ip.h>
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#include <linux/ipv6.h> /* for struct ipv6hdr */
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#include <net/ipv6.h>
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#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
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#include <net/netfilter/nf_conntrack.h>
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#endif
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#include <net/net_namespace.h> /* Netw namespace */
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/*
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* Generic access of ipvs struct
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*/
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static inline struct netns_ipvs *net_ipvs(struct net* net)
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{
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return net->ipvs;
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}
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/*
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* Get net ptr from skb in traffic cases
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* use skb_sknet when call is from userland (ioctl or netlink)
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*/
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static inline struct net *skb_net(const struct sk_buff *skb)
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{
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#ifdef CONFIG_NET_NS
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#ifdef CONFIG_IP_VS_DEBUG
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/*
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* This is used for debug only.
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* Start with the most likely hit
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* End with BUG
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*/
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if (likely(skb->dev && skb->dev->nd_net))
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return dev_net(skb->dev);
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if (skb_dst(skb) && skb_dst(skb)->dev)
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return dev_net(skb_dst(skb)->dev);
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WARN(skb->sk, "Maybe skb_sknet should be used in %s() at line:%d\n",
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__func__, __LINE__);
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if (likely(skb->sk && skb->sk->sk_net))
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return sock_net(skb->sk);
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pr_err("There is no net ptr to find in the skb in %s() line:%d\n",
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__func__, __LINE__);
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BUG();
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#else
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return dev_net(skb->dev ? : skb_dst(skb)->dev);
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#endif
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#else
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return &init_net;
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#endif
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}
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static inline struct net *skb_sknet(const struct sk_buff *skb)
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{
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#ifdef CONFIG_NET_NS
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#ifdef CONFIG_IP_VS_DEBUG
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/* Start with the most likely hit */
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if (likely(skb->sk && skb->sk->sk_net))
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return sock_net(skb->sk);
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WARN(skb->dev, "Maybe skb_net should be used instead in %s() line:%d\n",
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__func__, __LINE__);
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if (likely(skb->dev && skb->dev->nd_net))
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return dev_net(skb->dev);
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pr_err("There is no net ptr to find in the skb in %s() line:%d\n",
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__func__, __LINE__);
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BUG();
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#else
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return sock_net(skb->sk);
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#endif
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#else
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return &init_net;
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#endif
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}
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/*
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* This one needed for single_open_net since net is stored directly in
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* private not as a struct i.e. seq_file_net can't be used.
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*/
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static inline struct net *seq_file_single_net(struct seq_file *seq)
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{
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#ifdef CONFIG_NET_NS
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return (struct net *)seq->private;
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#else
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return &init_net;
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#endif
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}
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/* Connections' size value needed by ip_vs_ctl.c */
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extern int ip_vs_conn_tab_size;
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struct ip_vs_iphdr {
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int len;
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__u8 protocol;
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union nf_inet_addr saddr;
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union nf_inet_addr daddr;
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};
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static inline void
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ip_vs_fill_iphdr(int af, const void *nh, struct ip_vs_iphdr *iphdr)
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{
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#ifdef CONFIG_IP_VS_IPV6
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if (af == AF_INET6) {
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const struct ipv6hdr *iph = nh;
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iphdr->len = sizeof(struct ipv6hdr);
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iphdr->protocol = iph->nexthdr;
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iphdr->saddr.in6 = iph->saddr;
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iphdr->daddr.in6 = iph->daddr;
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} else
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#endif
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{
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const struct iphdr *iph = nh;
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iphdr->len = iph->ihl * 4;
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iphdr->protocol = iph->protocol;
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iphdr->saddr.ip = iph->saddr;
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iphdr->daddr.ip = iph->daddr;
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}
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}
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static inline void ip_vs_addr_copy(int af, union nf_inet_addr *dst,
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const union nf_inet_addr *src)
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{
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#ifdef CONFIG_IP_VS_IPV6
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if (af == AF_INET6)
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dst->in6 = src->in6;
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else
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#endif
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dst->ip = src->ip;
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}
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static inline int ip_vs_addr_equal(int af, const union nf_inet_addr *a,
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const union nf_inet_addr *b)
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{
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#ifdef CONFIG_IP_VS_IPV6
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if (af == AF_INET6)
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return ipv6_addr_equal(&a->in6, &b->in6);
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#endif
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return a->ip == b->ip;
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}
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#ifdef CONFIG_IP_VS_DEBUG
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#include <linux/net.h>
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extern int ip_vs_get_debug_level(void);
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static inline const char *ip_vs_dbg_addr(int af, char *buf, size_t buf_len,
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const union nf_inet_addr *addr,
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int *idx)
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{
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int len;
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#ifdef CONFIG_IP_VS_IPV6
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if (af == AF_INET6)
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len = snprintf(&buf[*idx], buf_len - *idx, "[%pI6]",
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&addr->in6) + 1;
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else
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#endif
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len = snprintf(&buf[*idx], buf_len - *idx, "%pI4",
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&addr->ip) + 1;
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*idx += len;
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BUG_ON(*idx > buf_len + 1);
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return &buf[*idx - len];
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}
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#define IP_VS_DBG_BUF(level, msg, ...) \
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do { \
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char ip_vs_dbg_buf[160]; \
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int ip_vs_dbg_idx = 0; \
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if (level <= ip_vs_get_debug_level()) \
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printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \
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} while (0)
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#define IP_VS_ERR_BUF(msg...) \
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do { \
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char ip_vs_dbg_buf[160]; \
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int ip_vs_dbg_idx = 0; \
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pr_err(msg); \
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} while (0)
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/* Only use from within IP_VS_DBG_BUF() or IP_VS_ERR_BUF macros */
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#define IP_VS_DBG_ADDR(af, addr) \
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ip_vs_dbg_addr(af, ip_vs_dbg_buf, \
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sizeof(ip_vs_dbg_buf), addr, \
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&ip_vs_dbg_idx)
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#define IP_VS_DBG(level, msg, ...) \
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do { \
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if (level <= ip_vs_get_debug_level()) \
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printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \
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} while (0)
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#define IP_VS_DBG_RL(msg, ...) \
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do { \
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if (net_ratelimit()) \
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printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \
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} while (0)
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#define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) \
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do { \
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if (level <= ip_vs_get_debug_level()) \
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pp->debug_packet(af, pp, skb, ofs, msg); \
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} while (0)
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#define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) \
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do { \
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if (level <= ip_vs_get_debug_level() && \
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net_ratelimit()) \
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pp->debug_packet(af, pp, skb, ofs, msg); \
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} while (0)
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#else /* NO DEBUGGING at ALL */
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#define IP_VS_DBG_BUF(level, msg...) do {} while (0)
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#define IP_VS_ERR_BUF(msg...) do {} while (0)
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#define IP_VS_DBG(level, msg...) do {} while (0)
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#define IP_VS_DBG_RL(msg...) do {} while (0)
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#define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) do {} while (0)
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#define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) do {} while (0)
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#endif
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#define IP_VS_BUG() BUG()
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#define IP_VS_ERR_RL(msg, ...) \
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do { \
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if (net_ratelimit()) \
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pr_err(msg, ##__VA_ARGS__); \
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} while (0)
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#ifdef CONFIG_IP_VS_DEBUG
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#define EnterFunction(level) \
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do { \
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if (level <= ip_vs_get_debug_level()) \
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printk(KERN_DEBUG \
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pr_fmt("Enter: %s, %s line %i\n"), \
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__func__, __FILE__, __LINE__); \
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} while (0)
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#define LeaveFunction(level) \
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do { \
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if (level <= ip_vs_get_debug_level()) \
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printk(KERN_DEBUG \
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pr_fmt("Leave: %s, %s line %i\n"), \
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__func__, __FILE__, __LINE__); \
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} while (0)
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#else
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#define EnterFunction(level) do {} while (0)
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#define LeaveFunction(level) do {} while (0)
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#endif
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#define IP_VS_WAIT_WHILE(expr) while (expr) { cpu_relax(); }
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/*
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* The port number of FTP service (in network order).
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*/
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#define FTPPORT cpu_to_be16(21)
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#define FTPDATA cpu_to_be16(20)
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/*
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* TCP State Values
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*/
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enum {
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IP_VS_TCP_S_NONE = 0,
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IP_VS_TCP_S_ESTABLISHED,
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IP_VS_TCP_S_SYN_SENT,
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IP_VS_TCP_S_SYN_RECV,
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IP_VS_TCP_S_FIN_WAIT,
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IP_VS_TCP_S_TIME_WAIT,
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IP_VS_TCP_S_CLOSE,
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IP_VS_TCP_S_CLOSE_WAIT,
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IP_VS_TCP_S_LAST_ACK,
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IP_VS_TCP_S_LISTEN,
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IP_VS_TCP_S_SYNACK,
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IP_VS_TCP_S_LAST
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};
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/*
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* UDP State Values
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*/
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enum {
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IP_VS_UDP_S_NORMAL,
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IP_VS_UDP_S_LAST,
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};
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/*
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* ICMP State Values
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*/
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enum {
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IP_VS_ICMP_S_NORMAL,
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IP_VS_ICMP_S_LAST,
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};
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/*
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* SCTP State Values
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*/
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enum ip_vs_sctp_states {
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IP_VS_SCTP_S_NONE,
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IP_VS_SCTP_S_INIT_CLI,
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IP_VS_SCTP_S_INIT_SER,
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IP_VS_SCTP_S_INIT_ACK_CLI,
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IP_VS_SCTP_S_INIT_ACK_SER,
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IP_VS_SCTP_S_ECHO_CLI,
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IP_VS_SCTP_S_ECHO_SER,
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IP_VS_SCTP_S_ESTABLISHED,
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IP_VS_SCTP_S_SHUT_CLI,
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IP_VS_SCTP_S_SHUT_SER,
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IP_VS_SCTP_S_SHUT_ACK_CLI,
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IP_VS_SCTP_S_SHUT_ACK_SER,
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IP_VS_SCTP_S_CLOSED,
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IP_VS_SCTP_S_LAST
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};
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/*
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* Delta sequence info structure
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* Each ip_vs_conn has 2 (output AND input seq. changes).
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* Only used in the VS/NAT.
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*/
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struct ip_vs_seq {
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__u32 init_seq; /* Add delta from this seq */
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__u32 delta; /* Delta in sequence numbers */
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__u32 previous_delta; /* Delta in sequence numbers
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before last resized pkt */
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};
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/*
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* counters per cpu
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*/
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struct ip_vs_counters {
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__u32 conns; /* connections scheduled */
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__u32 inpkts; /* incoming packets */
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__u32 outpkts; /* outgoing packets */
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__u64 inbytes; /* incoming bytes */
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__u64 outbytes; /* outgoing bytes */
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};
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/*
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* Stats per cpu
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*/
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struct ip_vs_cpu_stats {
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struct ip_vs_counters ustats;
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struct u64_stats_sync syncp;
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};
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/*
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* IPVS statistics objects
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*/
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struct ip_vs_estimator {
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struct list_head list;
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u64 last_inbytes;
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u64 last_outbytes;
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u32 last_conns;
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u32 last_inpkts;
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u32 last_outpkts;
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u32 cps;
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u32 inpps;
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u32 outpps;
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u32 inbps;
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u32 outbps;
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};
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struct ip_vs_stats {
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struct ip_vs_stats_user ustats; /* statistics */
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struct ip_vs_estimator est; /* estimator */
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struct ip_vs_cpu_stats *cpustats; /* per cpu counters */
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spinlock_t lock; /* spin lock */
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struct ip_vs_stats_user ustats0; /* reset values */
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};
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struct dst_entry;
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struct iphdr;
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struct ip_vs_conn;
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struct ip_vs_app;
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struct sk_buff;
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struct ip_vs_proto_data;
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struct ip_vs_protocol {
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struct ip_vs_protocol *next;
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char *name;
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u16 protocol;
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u16 num_states;
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int dont_defrag;
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void (*init)(struct ip_vs_protocol *pp);
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|
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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_conn *
|
|
(*conn_in_get)(int af,
|
|
const struct sk_buff *skb,
|
|
const struct ip_vs_iphdr *iph,
|
|
unsigned int proto_off,
|
|
int inverse);
|
|
|
|
struct ip_vs_conn *
|
|
(*conn_out_get)(int af,
|
|
const struct sk_buff *skb,
|
|
const struct ip_vs_iphdr *iph,
|
|
unsigned int proto_off,
|
|
int inverse);
|
|
|
|
int (*snat_handler)(struct sk_buff *skb,
|
|
struct ip_vs_protocol *pp, struct ip_vs_conn *cp);
|
|
|
|
int (*dnat_handler)(struct sk_buff *skb,
|
|
struct ip_vs_protocol *pp, struct ip_vs_conn *cp);
|
|
|
|
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);
|
|
|
|
/* 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_rtos; /* RT_TOS(tos) for dst */
|
|
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, unsigned int proto_off,
|
|
int inverse);
|
|
|
|
struct ip_vs_conn *
|
|
(*conn_out_get)(const struct sk_buff *skb, struct ip_vs_app *app,
|
|
const struct iphdr *iph, unsigned int proto_off,
|
|
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_ftp */
|
|
struct ip_vs_app *ftp_app;
|
|
/* 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;
|
|
|
|
/* 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;
|
|
}
|
|
|
|
#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;
|
|
}
|
|
|
|
#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,
|
|
unsigned int proto_off,
|
|
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,
|
|
unsigned int proto_off,
|
|
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 int 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);
|
|
extern int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb,
|
|
struct ip_vs_proto_data *pd);
|
|
|
|
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);
|
|
extern int ip_vs_bypass_xmit
|
|
(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
|
|
extern int ip_vs_nat_xmit
|
|
(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
|
|
extern int ip_vs_tunnel_xmit
|
|
(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
|
|
extern int ip_vs_dr_xmit
|
|
(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
|
|
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);
|
|
extern void ip_vs_dst_reset(struct ip_vs_dest *dest);
|
|
|
|
#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);
|
|
extern int ip_vs_nat_xmit_v6
|
|
(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
|
|
extern int ip_vs_tunnel_xmit_v6
|
|
(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
|
|
extern int ip_vs_dr_xmit_v6
|
|
(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
|
|
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);
|
|
#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 */
|