[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / xfrm / xfrm_hash.h

#ifndef _XFRM_HASH_H
#define _XFRM_HASH_H

#include <linux/xfrm.h>
#include <linux/socket.h>

static inline unsigned int __xfrm4_addr_hash(xfrm_address_t *addr)
{
	return ntohl(addr->a4);
}

static inline unsigned int __xfrm6_addr_hash(xfrm_address_t *addr)
{
	return ntohl(addr->a6[2] ^ addr->a6[3]);
}

static inline unsigned int __xfrm4_daddr_saddr_hash(xfrm_address_t *daddr, xfrm_address_t *saddr)
{
	return ntohl(daddr->a4 ^ saddr->a4);
}

static inline unsigned int __xfrm6_daddr_saddr_hash(xfrm_address_t *daddr, xfrm_address_t *saddr)
{
	return ntohl(daddr->a6[2] ^ daddr->a6[3] ^
		     saddr->a6[2] ^ saddr->a6[3]);
}

static inline unsigned int __xfrm_dst_hash(xfrm_address_t *daddr, xfrm_address_t *saddr,
					   u32 reqid, unsigned short family,
					   unsigned int hmask)
{
	unsigned int h = family ^ reqid;
	switch (family) {
	case AF_INET:
		h ^= __xfrm4_daddr_saddr_hash(daddr, saddr);
		break;
	case AF_INET6:
		h ^= __xfrm6_daddr_saddr_hash(daddr, saddr);
		break;
	}
	return (h ^ (h >> 16)) & hmask;
}

static inline unsigned __xfrm_src_hash(xfrm_address_t *saddr,
				       unsigned short family,
				       unsigned int hmask)
{
	unsigned int h = family;
	switch (family) {
	case AF_INET:
		h ^= __xfrm4_addr_hash(saddr);
		break;
	case AF_INET6:
		h ^= __xfrm6_addr_hash(saddr);
		break;
	};
	return (h ^ (h >> 16)) & hmask;
}

static inline unsigned int
__xfrm_spi_hash(xfrm_address_t *daddr, u32 spi, u8 proto, unsigned short family,
		unsigned int hmask)
{
	unsigned int h = spi ^ proto;
	switch (family) {
	case AF_INET:
		h ^= __xfrm4_addr_hash(daddr);
		break;
	case AF_INET6:
		h ^= __xfrm6_addr_hash(daddr);
		break;
	}
	return (h ^ (h >> 10) ^ (h >> 20)) & hmask;
}

static inline unsigned int __idx_hash(u32 index, unsigned int hmask)
{
	return (index ^ (index >> 8)) & hmask;
}

static inline unsigned int __sel_hash(struct xfrm_selector *sel, unsigned short family, unsigned int hmask)
{
	xfrm_address_t *daddr = &sel->daddr;
	xfrm_address_t *saddr = &sel->saddr;
	unsigned int h = 0;

	switch (family) {
	case AF_INET:
		if (sel->prefixlen_d != 32 ||
		    sel->prefixlen_s != 32)
			return hmask + 1;

		h = __xfrm4_daddr_saddr_hash(daddr, saddr);
		break;

	case AF_INET6:
		if (sel->prefixlen_d != 128 ||
		    sel->prefixlen_s != 128)
			return hmask + 1;

		h = __xfrm6_daddr_saddr_hash(daddr, saddr);
		break;
	};
	h ^= (h >> 16);
	return h & hmask;
}

static inline unsigned int __addr_hash(xfrm_address_t *daddr, xfrm_address_t *saddr, unsigned short family, unsigned int hmask)
{
	unsigned int h = 0;

	switch (family) {
	case AF_INET:
		h = __xfrm4_daddr_saddr_hash(daddr, saddr);
		break;

	case AF_INET6:
		h = __xfrm6_daddr_saddr_hash(daddr, saddr);
		break;
	};
	h ^= (h >> 16);
	return h & hmask;
}

extern struct hlist_head *xfrm_hash_alloc(unsigned int sz);
extern void xfrm_hash_free(struct hlist_head *n, unsigned int sz);

#endif /* _XFRM_HASH_H */
Commit	Line	Data
44e36b42 DM	1	#ifndef _XFRM_HASH_H
	2	#define _XFRM_HASH_H
	3
	4	#include <linux/xfrm.h>
	5	#include <linux/socket.h>
	6
	7	static inline unsigned int __xfrm4_addr_hash(xfrm_address_t *addr)
	8	{
	9	return ntohl(addr->a4);
	10	}
	11
	12	static inline unsigned int __xfrm6_addr_hash(xfrm_address_t *addr)
	13	{
	14	return ntohl(addr->a6[2] ^ addr->a6[3]);
	15	}
	16
	17	static inline unsigned int __xfrm4_daddr_saddr_hash(xfrm_address_t daddr, xfrm_address_t saddr)
	18	{
	19	return ntohl(daddr->a4 ^ saddr->a4);
	20	}
	21
	22	static inline unsigned int __xfrm6_daddr_saddr_hash(xfrm_address_t daddr, xfrm_address_t saddr)
	23	{
	24	return ntohl(daddr->a6[2] ^ daddr->a6[3] ^
	25	saddr->a6[2] ^ saddr->a6[3]);
	26	}
	27
	28	static inline unsigned int __xfrm_dst_hash(xfrm_address_t daddr, xfrm_address_t saddr,
	29	u32 reqid, unsigned short family,
	30	unsigned int hmask)
	31	{
	32	unsigned int h = family ^ reqid;
	33	switch (family) {
	34	case AF_INET:
	35	h ^= __xfrm4_daddr_saddr_hash(daddr, saddr);
	36	break;
	37	case AF_INET6:
	38	h ^= __xfrm6_daddr_saddr_hash(daddr, saddr);
	39	break;
	40	}
	41	return (h ^ (h >> 16)) & hmask;
	42	}
	43
	44	static inline unsigned __xfrm_src_hash(xfrm_address_t *saddr,
	45	unsigned short family,
	46	unsigned int hmask)
	47	{
	48	unsigned int h = family;
	49	switch (family) {
	50	case AF_INET:
	51	h ^= __xfrm4_addr_hash(saddr);
	52	break;
	53	case AF_INET6:
	54	h ^= __xfrm6_addr_hash(saddr);
	55	break;
	56	};
	57	return (h ^ (h >> 16)) & hmask;
	58	}
	59
	60	static inline unsigned int
	61	__xfrm_spi_hash(xfrm_address_t *daddr, u32 spi, u8 proto, unsigned short family,
	62	unsigned int hmask)
	63	{
	64	unsigned int h = spi ^ proto;
65	switch (family) {
66	case AF_INET:
67	h ^= __xfrm4_addr_hash(daddr);
68	break;
69	case AF_INET6:
70	h ^= __xfrm6_addr_hash(daddr);
71	break;
72	}
73	return (h ^ (h >> 10) ^ (h >> 20)) & hmask;
74	}
75
76	static inline unsigned int __idx_hash(u32 index, unsigned int hmask)
77	{
78	return (index ^ (index >> 8)) & hmask;
79	}
80
81	static inline unsigned int __sel_hash(struct xfrm_selector *sel, unsigned short family, unsigned int hmask)
82	{
83	xfrm_address_t *daddr = &sel->daddr;
84	xfrm_address_t *saddr = &sel->saddr;
85	unsigned int h = 0;
86
87	switch (family) {
88	case AF_INET:
89	if (sel->prefixlen_d != 32 \|\|
90	sel->prefixlen_s != 32)
91	return hmask + 1;
92
93	h = __xfrm4_daddr_saddr_hash(daddr, saddr);
94	break;
95
96	case AF_INET6:
97	if (sel->prefixlen_d != 128 \|\|
98	sel->prefixlen_s != 128)
99	return hmask + 1;
100
101	h = __xfrm6_daddr_saddr_hash(daddr, saddr);
102	break;
103	};
104	h ^= (h >> 16);
105	return h & hmask;
106	}
107
108	static inline unsigned int __addr_hash(xfrm_address_t daddr, xfrm_address_t saddr, unsigned short family, unsigned int hmask)
109	{
110	unsigned int h = 0;
111
112	switch (family) {
113	case AF_INET:
114	h = __xfrm4_daddr_saddr_hash(daddr, saddr);
115	break;
116
117	case AF_INET6:
118	h = __xfrm6_daddr_saddr_hash(daddr, saddr);
119	break;
120	};
121	h ^= (h >> 16);
122	return h & hmask;
123	}
124
125	extern struct hlist_head *xfrm_hash_alloc(unsigned int sz);
126	extern void xfrm_hash_free(struct hlist_head *n, unsigned int sz);
127
128	#endif /* _XFRM_HASH_H */