Merge branch 'lvs-next-2.6' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/lvs-2.6

1 files changed, 238 insertions, 70 deletions

diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h
index a25ad243031d..33e2ac6ceb3e 100644
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -21,11 +21,103 @@
 #include <linux/timer.h>
 
 #include <net/checksum.h>
+#include <linux/netfilter.h>            /* for union nf_inet_addr */
+#include <linux/ipv6.h>                 /* for struct ipv6hdr */
+#include <net/ipv6.h>                   /* for ipv6_addr_copy */
+
+struct ip_vs_iphdr {
+        int len;
+        __u8 protocol;
+        union nf_inet_addr saddr;
+        union nf_inet_addr daddr;
+};
+
+static inline void
+ip_vs_fill_iphdr(int af, const void *nh, struct ip_vs_iphdr *iphdr)
+{
+#ifdef CONFIG_IP_VS_IPV6
+        if (af == AF_INET6) {
+                const struct ipv6hdr *iph = nh;
+                iphdr->len = sizeof(struct ipv6hdr);
+                iphdr->protocol = iph->nexthdr;
+                ipv6_addr_copy(&iphdr->saddr.in6, &iph->saddr);
+                ipv6_addr_copy(&iphdr->daddr.in6, &iph->daddr);
+        } else
+#endif
+        {
+                const struct iphdr *iph = nh;
+                iphdr->len = iph->ihl * 4;
+                iphdr->protocol = iph->protocol;
+                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)
+                ipv6_addr_copy(&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, "[" NIP6_FMT "]",
+                               NIP6(addr->in6)) + 1;
+        else
+#endif
+                len = snprintf(&buf[*idx], buf_len - *idx, NIPQUAD_FMT,
+                               NIPQUAD(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 "IPVS: " msg);    \
+    } while (0)
+#define IP_VS_ERR_BUF(msg...)                           \
+    do {                                                \
+            char ip_vs_dbg_buf[160];                    \
+            int ip_vs_dbg_idx = 0;                      \
+            printk(KERN_ERR "IPVS: " 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())       \
@@ -48,6 +140,8 @@ extern int ip_vs_get_debug_level(void);
                 pp->debug_packet(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, pp, skb, ofs, msg)         do {} while (0)
@@ -160,27 +254,10 @@ struct ip_vs_estimator {
 
 struct ip_vs_stats
 {
-        __u32                   conns;          /* connections scheduled */
-        __u32                   inpkts;         /* incoming packets */
-        __u32                   outpkts;        /* outgoing packets */
-        __u64                   inbytes;        /* incoming bytes */
-        __u64                   outbytes;       /* outgoing bytes */
-
-        __u32                   cps;            /* current connection rate */
-        __u32                   inpps;          /* current in packet rate */
-        __u32                   outpps;         /* current out packet rate */
-        __u32                   inbps;          /* current in byte rate */
-        __u32                   outbps;         /* current out byte rate */
-
-        /*
-         * Don't add anything before the lock, because we use memcpy() to copy
-         * the members before the lock to struct ip_vs_stats_user in
-         * ip_vs_ctl.c.
-         */
+        struct ip_vs_stats_user ustats;         /* statistics */
+        struct ip_vs_estimator  est;            /* estimator */
 
         spinlock_t              lock;           /* spin lock */
-
-        struct ip_vs_estimator  est;            /* estimator */
 };
 
 struct dst_entry;
@@ -202,21 +279,23 @@ struct ip_vs_protocol {
 
         void (*exit)(struct ip_vs_protocol *pp);
 
-        int (*conn_schedule)(struct sk_buff *skb,
+        int (*conn_schedule)(int af, struct sk_buff *skb,
                              struct ip_vs_protocol *pp,
                              int *verdict, struct ip_vs_conn **cpp);
 
         struct ip_vs_conn *
-        (*conn_in_get)(const struct sk_buff *skb,
+        (*conn_in_get)(int af,
+                       const struct sk_buff *skb,
                        struct ip_vs_protocol *pp,
-                       const struct iphdr *iph,
+                       const struct ip_vs_iphdr *iph,
                        unsigned int proto_off,
                        int inverse);
 
         struct ip_vs_conn *
-        (*conn_out_get)(const struct sk_buff *skb,
+        (*conn_out_get)(int af,
+                        const struct sk_buff *skb,
                         struct ip_vs_protocol *pp,
-                        const struct iphdr *iph,
+                        const struct ip_vs_iphdr *iph,
                         unsigned int proto_off,
                         int inverse);
 
@@ -226,7 +305,8 @@ struct ip_vs_protocol {
         int (*dnat_handler)(struct sk_buff *skb,
                             struct ip_vs_protocol *pp, struct ip_vs_conn *cp);
 
-        int (*csum_check)(struct sk_buff *skb, struct ip_vs_protocol *pp);
+        int (*csum_check)(int af, struct sk_buff *skb,
+                          struct ip_vs_protocol *pp);
 
         const char *(*state_name)(int state);
 
@@ -259,9 +339,10 @@ struct ip_vs_conn {
         struct list_head        c_list;         /* hashed list heads */
 
         /* Protocol, addresses and port numbers */
-        __be32                   caddr;          /* client address */
-        __be32                   vaddr;          /* virtual address */
-        __be32                   daddr;          /* destination address */
+        u16                      af;            /* address family */
+        union nf_inet_addr       caddr;          /* client address */
+        union nf_inet_addr       vaddr;          /* virtual address */
+        union nf_inet_addr       daddr;          /* destination address */
         __be16                   cport;
         __be16                   vport;
         __be16                   dport;
@@ -305,6 +386,45 @@ struct ip_vs_conn {
 
 
 /*
+ *      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;
+        unsigned                flags;          /* virtual service flags */
+        unsigned                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                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
  */
@@ -314,8 +434,9 @@ struct ip_vs_service {
         atomic_t                refcnt;   /* reference counter */
         atomic_t                usecnt;   /* use counter */
 
+        u16                     af;       /* address family */
         __u16                   protocol; /* which protocol (TCP/UDP) */
-        __be32                  addr;     /* IP address for virtual service */
+        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                flags;    /* service status flags */
@@ -342,7 +463,8 @@ 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 */
 
-        __be32                  addr;           /* IP address of the server */
+        u16                     af;             /* address family */
+        union nf_inet_addr      addr;           /* IP address of the server */
         __be16                  port;           /* port number of the server */
         volatile unsigned       flags;          /* dest status flags */
         atomic_t                conn_flags;     /* flags to copy to conn */
@@ -366,7 +488,7 @@ struct ip_vs_dest {
         /* for virtual service */
         struct ip_vs_service    *svc;           /* service it belongs to */
         __u16                   protocol;       /* which protocol (TCP/UDP) */
-        __be32                  vaddr;          /* virtual IP address */
+        union nf_inet_addr      vaddr;          /* virtual IP address */
         __be16                  vport;          /* virtual port number */
         __u32                   vfwmark;        /* firewall mark of service */
 };
@@ -380,6 +502,9 @@ struct ip_vs_scheduler {
         char                    *name;          /* scheduler name */
         atomic_t                refcnt;         /* reference counter */
         struct module           *module;        /* THIS_MODULE/NULL */
+#ifdef CONFIG_IP_VS_IPV6
+        int                     supports_ipv6;  /* scheduler has IPv6 support */
+#endif
 
         /* scheduler initializing service */
         int (*init_service)(struct ip_vs_service *svc);
@@ -479,16 +604,8 @@ extern void ip_vs_init_hash_table(struct list_head *table, int rows);
 #ifndef CONFIG_IP_VS_TAB_BITS
 #define CONFIG_IP_VS_TAB_BITS   12
 #endif
-/* make sure that IP_VS_CONN_TAB_BITS is located in [8, 20] */
-#if CONFIG_IP_VS_TAB_BITS < 8
-#define IP_VS_CONN_TAB_BITS     8
-#endif
-#if CONFIG_IP_VS_TAB_BITS > 20
-#define IP_VS_CONN_TAB_BITS     20
-#endif
-#if 8 <= CONFIG_IP_VS_TAB_BITS && CONFIG_IP_VS_TAB_BITS <= 20
+
 #define IP_VS_CONN_TAB_BITS     CONFIG_IP_VS_TAB_BITS
-#endif
 #define IP_VS_CONN_TAB_SIZE     (1 << IP_VS_CONN_TAB_BITS)
 #define IP_VS_CONN_TAB_MASK     (IP_VS_CONN_TAB_SIZE - 1)
 
@@ -500,11 +617,16 @@ enum {
 };
 
 extern struct ip_vs_conn *ip_vs_conn_in_get
-(int protocol, __be32 s_addr, __be16 s_port, __be32 d_addr, __be16 d_port);
+(int af, int protocol, const union nf_inet_addr *s_addr, __be16 s_port,
+ const union nf_inet_addr *d_addr, __be16 d_port);
+
 extern struct ip_vs_conn *ip_vs_ct_in_get
-(int protocol, __be32 s_addr, __be16 s_port, __be32 d_addr, __be16 d_port);
+(int af, int protocol, const union nf_inet_addr *s_addr, __be16 s_port,
+ const union nf_inet_addr *d_addr, __be16 d_port);
+
 extern struct ip_vs_conn *ip_vs_conn_out_get
-(int protocol, __be32 s_addr, __be16 s_port, __be32 d_addr, __be16 d_port);
+(int af, int protocol, const union nf_inet_addr *s_addr, __be16 s_port,
+ const union nf_inet_addr *d_addr, __be16 d_port);
 
 /* put back the conn without restarting its timer */
 static inline void __ip_vs_conn_put(struct ip_vs_conn *cp)
@@ -515,8 +637,9 @@ 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);
 
 extern struct ip_vs_conn *
-ip_vs_conn_new(int proto, __be32 caddr, __be16 cport, __be32 vaddr, __be16 vport,
-               __be32 daddr, __be16 dport, unsigned flags,
+ip_vs_conn_new(int af, int proto, const union nf_inet_addr *caddr, __be16 cport,
+               const union nf_inet_addr *vaddr, __be16 vport,
+               const union nf_inet_addr *daddr, __be16 dport, unsigned flags,
                struct ip_vs_dest *dest);
 extern void ip_vs_conn_expire_now(struct ip_vs_conn *cp);
 
@@ -532,24 +655,32 @@ 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("request control DEL for uncontrolled: "
-                          "%d.%d.%d.%d:%d to %d.%d.%d.%d:%d\n",
-                          NIPQUAD(cp->caddr),ntohs(cp->cport),
-                          NIPQUAD(cp->vaddr),ntohs(cp->vport));
+                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(7, "DELeting control for: "
-                  "cp.dst=%d.%d.%d.%d:%d ctl_cp.dst=%d.%d.%d.%d:%d\n",
-                  NIPQUAD(cp->caddr),ntohs(cp->cport),
-                  NIPQUAD(ctl_cp->caddr),ntohs(ctl_cp->cport));
+        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("BUG control DEL with n=0 : "
-                          "%d.%d.%d.%d:%d to %d.%d.%d.%d:%d\n",
-                          NIPQUAD(cp->caddr),ntohs(cp->cport),
-                          NIPQUAD(cp->vaddr),ntohs(cp->vport));
+                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);
@@ -559,17 +690,22 @@ static inline void
 ip_vs_control_add(struct ip_vs_conn *cp, struct ip_vs_conn *ctl_cp)
 {
         if (cp->control) {
-                IP_VS_ERR("request control ADD for already controlled: "
-                          "%d.%d.%d.%d:%d to %d.%d.%d.%d:%d\n",
-                          NIPQUAD(cp->caddr),ntohs(cp->cport),
-                          NIPQUAD(cp->vaddr),ntohs(cp->vport));
+                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(7, "ADDing control for: "
-                  "cp.dst=%d.%d.%d.%d:%d ctl_cp.dst=%d.%d.%d.%d:%d\n",
-                  NIPQUAD(cp->caddr),ntohs(cp->cport),
-                  NIPQUAD(ctl_cp->caddr),ntohs(ctl_cp->cport));
+        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);
@@ -647,7 +783,8 @@ extern struct ip_vs_stats ip_vs_stats;
 extern const struct ctl_path net_vs_ctl_path[];
 
 extern struct ip_vs_service *
-ip_vs_service_get(__u32 fwmark, __u16 protocol, __be32 vaddr, __be16 vport);
+ip_vs_service_get(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)
 {
@@ -655,14 +792,16 @@ static inline void ip_vs_service_put(struct ip_vs_service *svc)
 }
 
 extern struct ip_vs_dest *
-ip_vs_lookup_real_service(__u16 protocol, __be32 daddr, __be16 dport);
+ip_vs_lookup_real_service(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_control_init(void);
 extern void ip_vs_control_cleanup(void);
 extern struct ip_vs_dest *
-ip_vs_find_dest(__be32 daddr, __be16 dport,
-                 __be32 vaddr, __be16 vport, __u16 protocol);
+ip_vs_find_dest(int af, const union nf_inet_addr *daddr, __be16 dport,
+                const union nf_inet_addr *vaddr, __be16 vport, __u16 protocol);
 extern struct ip_vs_dest *ip_vs_try_bind_dest(struct ip_vs_conn *cp);
 
 
@@ -706,6 +845,19 @@ extern int ip_vs_icmp_xmit
 (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp, int offset);
 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);
+#endif
 
 /*
  *      This is a simple mechanism to ignore packets when
@@ -750,7 +902,12 @@ static inline char ip_vs_fwd_tag(struct ip_vs_conn *cp)
 }
 
 extern void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp,
-                struct ip_vs_conn *cp, int dir);
+                           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);
 
@@ -761,6 +918,17 @@ static inline __wsum ip_vs_check_diff4(__be32 old, __be32 new, __wsum oldsum)
         return csum_partial((char *) 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((char *) diff, sizeof(diff), oldsum);
+}
+#endif
+
 static inline __wsum ip_vs_check_diff2(__be16 old, __be16 new, __wsum oldsum)
 {
         __be16 diff[2] = { ~old, new };