[XFRM]: Extract common hashing code into xfrm_hash.[ch]
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 37213f9..4341795 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -18,11 +18,11 @@
#include <linux/pfkeyv2.h>
#include <linux/ipsec.h>
#include <linux/module.h>
-#include <linux/bootmem.h>
-#include <linux/vmalloc.h>
#include <linux/cache.h>
#include <asm/uaccess.h>
+#include "xfrm_hash.h"
+
struct sock *xfrm_nl;
EXPORT_SYMBOL(xfrm_nl);
@@ -55,44 +55,6 @@
static unsigned int xfrm_state_num;
static unsigned int xfrm_state_genid;
-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 int xfrm_dst_hash(xfrm_address_t *daddr,
xfrm_address_t *saddr,
u32 reqid,
@@ -101,76 +63,18 @@
return __xfrm_dst_hash(daddr, saddr, reqid, family, xfrm_state_hmask);
}
-static inline unsigned __xfrm_src_hash(xfrm_address_t *addr, unsigned short family,
- unsigned int hmask)
-{
- unsigned int h = family;
- switch (family) {
- case AF_INET:
- h ^= __xfrm4_addr_hash(addr);
- break;
- case AF_INET6:
- h ^= __xfrm6_addr_hash(addr);
- break;
- };
- return (h ^ (h >> 16)) & hmask;
-}
-
-static inline unsigned xfrm_src_hash(xfrm_address_t *addr, unsigned short family)
+static inline unsigned int xfrm_src_hash(xfrm_address_t *addr,
+ unsigned short family)
{
return __xfrm_src_hash(addr, family, xfrm_state_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
xfrm_spi_hash(xfrm_address_t *daddr, u32 spi, u8 proto, unsigned short family)
{
return __xfrm_spi_hash(daddr, spi, proto, family, xfrm_state_hmask);
}
-static struct hlist_head *xfrm_state_hash_alloc(unsigned int sz)
-{
- struct hlist_head *n;
-
- if (sz <= PAGE_SIZE)
- n = kmalloc(sz, GFP_KERNEL);
- else if (hashdist)
- n = __vmalloc(sz, GFP_KERNEL, PAGE_KERNEL);
- else
- n = (struct hlist_head *)
- __get_free_pages(GFP_KERNEL, get_order(sz));
-
- if (n)
- memset(n, 0, sz);
-
- return n;
-}
-
-static void xfrm_state_hash_free(struct hlist_head *n, unsigned int sz)
-{
- if (sz <= PAGE_SIZE)
- kfree(n);
- else if (hashdist)
- vfree(n);
- else
- free_pages((unsigned long)n, get_order(sz));
-}
-
static void xfrm_hash_transfer(struct hlist_head *list,
struct hlist_head *ndsttable,
struct hlist_head *nsrctable,
@@ -216,18 +120,18 @@
mutex_lock(&hash_resize_mutex);
nsize = xfrm_hash_new_size();
- ndst = xfrm_state_hash_alloc(nsize);
+ ndst = xfrm_hash_alloc(nsize);
if (!ndst)
goto out_unlock;
- nsrc = xfrm_state_hash_alloc(nsize);
+ nsrc = xfrm_hash_alloc(nsize);
if (!nsrc) {
- xfrm_state_hash_free(ndst, nsize);
+ xfrm_hash_free(ndst, nsize);
goto out_unlock;
}
- nspi = xfrm_state_hash_alloc(nsize);
+ nspi = xfrm_hash_alloc(nsize);
if (!nspi) {
- xfrm_state_hash_free(ndst, nsize);
- xfrm_state_hash_free(nsrc, nsize);
+ xfrm_hash_free(ndst, nsize);
+ xfrm_hash_free(nsrc, nsize);
goto out_unlock;
}
@@ -251,9 +155,9 @@
spin_unlock_bh(&xfrm_state_lock);
osize = (ohashmask + 1) * sizeof(struct hlist_head);
- xfrm_state_hash_free(odst, osize);
- xfrm_state_hash_free(osrc, osize);
- xfrm_state_hash_free(ospi, osize);
+ xfrm_hash_free(odst, osize);
+ xfrm_hash_free(osrc, osize);
+ xfrm_hash_free(ospi, osize);
out_unlock:
mutex_unlock(&hash_resize_mutex);
@@ -1643,9 +1547,9 @@
sz = sizeof(struct hlist_head) * 8;
- xfrm_state_bydst = xfrm_state_hash_alloc(sz);
- xfrm_state_bysrc = xfrm_state_hash_alloc(sz);
- xfrm_state_byspi = xfrm_state_hash_alloc(sz);
+ xfrm_state_bydst = xfrm_hash_alloc(sz);
+ xfrm_state_bysrc = xfrm_hash_alloc(sz);
+ xfrm_state_byspi = xfrm_hash_alloc(sz);
if (!xfrm_state_bydst || !xfrm_state_bysrc || !xfrm_state_byspi)
panic("XFRM: Cannot allocate bydst/bysrc/byspi hashes.");
xfrm_state_hmask = ((sz / sizeof(struct hlist_head)) - 1);
