zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/net/xfrm/xfrm_hash.h b/ap/os/linux/linux-3.4.x/net/xfrm/xfrm_hash.h
new file mode 100644
index 0000000..7199d78
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/net/xfrm/xfrm_hash.h
@@ -0,0 +1,136 @@
+#ifndef _XFRM_HASH_H
+#define _XFRM_HASH_H
+
+#include <linux/xfrm.h>
+#include <linux/socket.h>
+
+static inline unsigned int __xfrm4_addr_hash(const xfrm_address_t *addr)
+{
+ return ntohl(addr->a4);
+}
+
+static inline unsigned int __xfrm6_addr_hash(const xfrm_address_t *addr)
+{
+ return ntohl(addr->a6[2] ^ addr->a6[3]);
+}
+
+static inline unsigned int __xfrm4_daddr_saddr_hash(const xfrm_address_t *daddr,
+ const xfrm_address_t *saddr)
+{
+ u32 sum = (__force u32)daddr->a4 + (__force u32)saddr->a4;
+ return ntohl((__force __be32)sum);
+}
+
+static inline unsigned int __xfrm6_daddr_saddr_hash(const xfrm_address_t *daddr,
+ const 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(const xfrm_address_t *daddr,
+ const 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(const xfrm_address_t *daddr,
+ const xfrm_address_t *saddr,
+ unsigned short family,
+ unsigned int hmask)
+{
+ unsigned int h = family;
+ 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 int
+__xfrm_spi_hash(const xfrm_address_t *daddr, __be32 spi, u8 proto,
+ unsigned short family, unsigned int hmask)
+{
+ unsigned int h = (__force u32)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(const struct xfrm_selector *sel,
+ unsigned short family, unsigned int hmask)
+{
+ const xfrm_address_t *daddr = &sel->daddr;
+ const 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(const xfrm_address_t *daddr,
+ const 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 */