diff options
Diffstat (limited to 'include/net/ipv6.h')
| -rw-r--r-- | include/net/ipv6.h | 152 |
1 files changed, 125 insertions, 27 deletions
diff --git a/include/net/ipv6.h b/include/net/ipv6.h index 5af66b26ebdd..64d12e77719a 100644 --- a/include/net/ipv6.h +++ b/include/net/ipv6.h @@ -15,6 +15,7 @@ #include <linux/ipv6.h> #include <linux/hardirq.h> +#include <linux/jhash.h> #include <net/if_inet6.h> #include <net/ndisc.h> #include <net/flow.h> @@ -222,6 +223,7 @@ struct ip6_flowlabel { struct in6_addr dst; struct ipv6_txoptions *opt; unsigned long linger; + struct rcu_head rcu; u8 share; union { struct pid *pid; @@ -238,6 +240,7 @@ struct ip6_flowlabel { struct ipv6_fl_socklist { struct ipv6_fl_socklist *next; struct ip6_flowlabel *fl; + struct rcu_head rcu; }; extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label); @@ -288,12 +291,12 @@ static inline int ip6_frag_nqueues(struct net *net) static inline int ip6_frag_mem(struct net *net) { - return atomic_read(&net->ipv6.frags.mem); + return sum_frag_mem_limit(&net->ipv6.frags); } #endif -#define IPV6_FRAG_HIGH_THRESH (256 * 1024) /* 262144 */ -#define IPV6_FRAG_LOW_THRESH (192 * 1024) /* 196608 */ +#define IPV6_FRAG_HIGH_THRESH (4 * 1024*1024) /* 4194304 */ +#define IPV6_FRAG_LOW_THRESH (3 * 1024*1024) /* 3145728 */ #define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */ extern int __ipv6_addr_type(const struct in6_addr *addr); @@ -355,14 +358,32 @@ static inline void ipv6_addr_prefix(struct in6_addr *pfx, pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); } +static inline void __ipv6_addr_set_half(__be32 *addr, + __be32 wh, __be32 wl) +{ +#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 +#if defined(__BIG_ENDIAN) + if (__builtin_constant_p(wh) && __builtin_constant_p(wl)) { + *(__force u64 *)addr = ((__force u64)(wh) << 32 | (__force u64)(wl)); + return; + } +#elif defined(__LITTLE_ENDIAN) + if (__builtin_constant_p(wl) && __builtin_constant_p(wh)) { + *(__force u64 *)addr = ((__force u64)(wl) << 32 | (__force u64)(wh)); + return; + } +#endif +#endif + addr[0] = wh; + addr[1] = wl; +} + static inline void ipv6_addr_set(struct in6_addr *addr, __be32 w1, __be32 w2, __be32 w3, __be32 w4) { - addr->s6_addr32[0] = w1; - addr->s6_addr32[1] = w2; - addr->s6_addr32[2] = w3; - addr->s6_addr32[3] = w4; + __ipv6_addr_set_half(&addr->s6_addr32[0], w1, w2); + __ipv6_addr_set_half(&addr->s6_addr32[2], w3, w4); } static inline bool ipv6_addr_equal(const struct in6_addr *a1, @@ -381,9 +402,37 @@ static inline bool ipv6_addr_equal(const struct in6_addr *a1, #endif } -static inline bool __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2, - unsigned int prefixlen) +#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 +static inline bool __ipv6_prefix_equal64_half(const __be64 *a1, + const __be64 *a2, + unsigned int len) +{ + if (len && ((*a1 ^ *a2) & cpu_to_be64((~0UL) << (64 - len)))) + return false; + return true; +} + +static inline bool ipv6_prefix_equal(const struct in6_addr *addr1, + const struct in6_addr *addr2, + unsigned int prefixlen) +{ + const __be64 *a1 = (const __be64 *)addr1; + const __be64 *a2 = (const __be64 *)addr2; + + if (prefixlen >= 64) { + if (a1[0] ^ a2[0]) + return false; + return __ipv6_prefix_equal64_half(a1 + 1, a2 + 1, prefixlen - 64); + } + return __ipv6_prefix_equal64_half(a1, a2, prefixlen); +} +#else +static inline bool ipv6_prefix_equal(const struct in6_addr *addr1, + const struct in6_addr *addr2, + unsigned int prefixlen) { + const __be32 *a1 = addr1->s6_addr32; + const __be32 *a2 = addr2->s6_addr32; unsigned int pdw, pbi; /* check complete u32 in prefix */ @@ -398,14 +447,7 @@ static inline bool __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2, return true; } - -static inline bool ipv6_prefix_equal(const struct in6_addr *a1, - const struct in6_addr *a2, - unsigned int prefixlen) -{ - return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32, - prefixlen); -} +#endif struct inet_frag_queue; @@ -473,16 +515,38 @@ static inline u32 ipv6_addr_hash(const struct in6_addr *a) #endif } +/* more secured version of ipv6_addr_hash() */ +static inline u32 ipv6_addr_jhash(const struct in6_addr *a) +{ + u32 v = (__force u32)a->s6_addr32[0] ^ (__force u32)a->s6_addr32[1]; + + return jhash_3words(v, + (__force u32)a->s6_addr32[2], + (__force u32)a->s6_addr32[3], + ipv6_hash_secret); +} + static inline bool ipv6_addr_loopback(const struct in6_addr *a) { +#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 + const unsigned long *ul = (const unsigned long *)a; + + return (ul[0] | (ul[1] ^ cpu_to_be64(1))) == 0UL; +#else return (a->s6_addr32[0] | a->s6_addr32[1] | a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0; +#endif } static inline bool ipv6_addr_v4mapped(const struct in6_addr *a) { - return (a->s6_addr32[0] | a->s6_addr32[1] | - (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0; + return ( +#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 + *(__be64 *)a | +#else + (a->s6_addr32[0] | a->s6_addr32[1]) | +#endif + (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0UL; } /* @@ -507,7 +571,7 @@ static inline void ipv6_addr_set_v4mapped(const __be32 addr, * find the first different bit between two addresses * length of address must be a multiple of 32bits */ -static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen) +static inline int __ipv6_addr_diff32(const void *token1, const void *token2, int addrlen) { const __be32 *a1 = token1, *a2 = token2; int i; @@ -539,6 +603,33 @@ static inline int __ipv6_addr_diff(const void *token1, const void *token2, int a return addrlen << 5; } +#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 +static inline int __ipv6_addr_diff64(const void *token1, const void *token2, int addrlen) +{ + const __be64 *a1 = token1, *a2 = token2; + int i; + + addrlen >>= 3; + + for (i = 0; i < addrlen; i++) { + __be64 xb = a1[i] ^ a2[i]; + if (xb) + return i * 64 + 63 - __fls(be64_to_cpu(xb)); + } + + return addrlen << 6; +} +#endif + +static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen) +{ +#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 + if (__builtin_constant_p(addrlen) && !(addrlen & 7)) + return __ipv6_addr_diff64(token1, token2, addrlen); +#endif + return __ipv6_addr_diff32(token1, token2, addrlen); +} + static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2) { return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr)); @@ -547,6 +638,20 @@ static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_add extern void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt); /* + * Header manipulation + */ +static inline void ip6_flow_hdr(struct ipv6hdr *hdr, unsigned int tclass, + __be32 flowlabel) +{ + *(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | flowlabel; +} + +static inline __be32 ip6_flowinfo(const struct ipv6hdr *hdr) +{ + return *(__be32 *)hdr & IPV6_FLOWINFO_MASK; +} + +/* * Prototypes exported by ipv6 */ @@ -570,13 +675,6 @@ extern int ip6_xmit(struct sock *sk, struct ipv6_txoptions *opt, int tclass); -extern int ip6_nd_hdr(struct sock *sk, - struct sk_buff *skb, - struct net_device *dev, - const struct in6_addr *saddr, - const struct in6_addr *daddr, - int proto, int len); - extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr); extern int ip6_append_data(struct sock *sk, |