[XFRM]: Extract common hashing code into xfrm_hash.[ch]
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
parent
2518c7c2b3
commit
44e36b42a8
5 changed files with 195 additions and 200 deletions
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@ -2,6 +2,7 @@
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# Makefile for the XFRM subsystem.
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#
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obj-$(CONFIG_XFRM) := xfrm_policy.o xfrm_state.o xfrm_input.o xfrm_algo.o
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obj-$(CONFIG_XFRM) := xfrm_policy.o xfrm_state.o xfrm_hash.o \
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xfrm_input.o xfrm_algo.o
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obj-$(CONFIG_XFRM_USER) += xfrm_user.o
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41
net/xfrm/xfrm_hash.c
Normal file
41
net/xfrm/xfrm_hash.c
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@ -0,0 +1,41 @@
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/* xfrm_hash.c: Common hash table code.
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*
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* Copyright (C) 2006 David S. Miller (davem@davemloft.net)
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*/
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/bootmem.h>
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#include <linux/vmalloc.h>
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#include <linux/slab.h>
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#include <linux/xfrm.h>
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#include "xfrm_hash.h"
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struct hlist_head *xfrm_hash_alloc(unsigned int sz)
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{
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struct hlist_head *n;
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if (sz <= PAGE_SIZE)
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n = kmalloc(sz, GFP_KERNEL);
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else if (hashdist)
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n = __vmalloc(sz, GFP_KERNEL, PAGE_KERNEL);
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else
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n = (struct hlist_head *)
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__get_free_pages(GFP_KERNEL, get_order(sz));
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if (n)
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memset(n, 0, sz);
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return n;
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}
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void xfrm_hash_free(struct hlist_head *n, unsigned int sz)
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{
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if (sz <= PAGE_SIZE)
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kfree(n);
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else if (hashdist)
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vfree(n);
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else
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free_pages((unsigned long)n, get_order(sz));
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}
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128
net/xfrm/xfrm_hash.h
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128
net/xfrm/xfrm_hash.h
Normal file
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@ -0,0 +1,128 @@
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#ifndef _XFRM_HASH_H
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#define _XFRM_HASH_H
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#include <linux/xfrm.h>
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#include <linux/socket.h>
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static inline unsigned int __xfrm4_addr_hash(xfrm_address_t *addr)
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{
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return ntohl(addr->a4);
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}
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static inline unsigned int __xfrm6_addr_hash(xfrm_address_t *addr)
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{
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return ntohl(addr->a6[2] ^ addr->a6[3]);
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}
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static inline unsigned int __xfrm4_daddr_saddr_hash(xfrm_address_t *daddr, xfrm_address_t *saddr)
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{
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return ntohl(daddr->a4 ^ saddr->a4);
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}
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static inline unsigned int __xfrm6_daddr_saddr_hash(xfrm_address_t *daddr, xfrm_address_t *saddr)
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{
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return ntohl(daddr->a6[2] ^ daddr->a6[3] ^
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saddr->a6[2] ^ saddr->a6[3]);
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}
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static inline unsigned int __xfrm_dst_hash(xfrm_address_t *daddr, xfrm_address_t *saddr,
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u32 reqid, unsigned short family,
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unsigned int hmask)
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{
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unsigned int h = family ^ reqid;
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switch (family) {
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case AF_INET:
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h ^= __xfrm4_daddr_saddr_hash(daddr, saddr);
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break;
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case AF_INET6:
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h ^= __xfrm6_daddr_saddr_hash(daddr, saddr);
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break;
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}
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return (h ^ (h >> 16)) & hmask;
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}
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static inline unsigned __xfrm_src_hash(xfrm_address_t *saddr,
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unsigned short family,
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unsigned int hmask)
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{
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unsigned int h = family;
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switch (family) {
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case AF_INET:
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h ^= __xfrm4_addr_hash(saddr);
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break;
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case AF_INET6:
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h ^= __xfrm6_addr_hash(saddr);
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break;
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};
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return (h ^ (h >> 16)) & hmask;
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}
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static inline unsigned int
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__xfrm_spi_hash(xfrm_address_t *daddr, u32 spi, u8 proto, unsigned short family,
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unsigned int hmask)
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{
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unsigned int h = spi ^ proto;
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switch (family) {
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case AF_INET:
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h ^= __xfrm4_addr_hash(daddr);
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break;
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case AF_INET6:
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h ^= __xfrm6_addr_hash(daddr);
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break;
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}
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return (h ^ (h >> 10) ^ (h >> 20)) & hmask;
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}
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static inline unsigned int __idx_hash(u32 index, unsigned int hmask)
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{
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return (index ^ (index >> 8)) & hmask;
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}
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static inline unsigned int __sel_hash(struct xfrm_selector *sel, unsigned short family, unsigned int hmask)
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{
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xfrm_address_t *daddr = &sel->daddr;
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xfrm_address_t *saddr = &sel->saddr;
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unsigned int h = 0;
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switch (family) {
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case AF_INET:
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if (sel->prefixlen_d != 32 ||
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sel->prefixlen_s != 32)
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return hmask + 1;
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h = __xfrm4_daddr_saddr_hash(daddr, saddr);
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break;
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case AF_INET6:
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if (sel->prefixlen_d != 128 ||
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sel->prefixlen_s != 128)
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return hmask + 1;
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h = __xfrm6_daddr_saddr_hash(daddr, saddr);
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break;
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};
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h ^= (h >> 16);
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return h & hmask;
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}
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static inline unsigned int __addr_hash(xfrm_address_t *daddr, xfrm_address_t *saddr, unsigned short family, unsigned int hmask)
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{
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unsigned int h = 0;
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switch (family) {
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case AF_INET:
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h = __xfrm4_daddr_saddr_hash(daddr, saddr);
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break;
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case AF_INET6:
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h = __xfrm6_daddr_saddr_hash(daddr, saddr);
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break;
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};
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h ^= (h >> 16);
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return h & hmask;
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}
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extern struct hlist_head *xfrm_hash_alloc(unsigned int sz);
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extern void xfrm_hash_free(struct hlist_head *n, unsigned int sz);
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#endif /* _XFRM_HASH_H */
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@ -22,12 +22,12 @@
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#include <linux/netdevice.h>
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#include <linux/netfilter.h>
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#include <linux/module.h>
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#include <linux/bootmem.h>
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#include <linux/vmalloc.h>
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#include <linux/cache.h>
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#include <net/xfrm.h>
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#include <net/ip.h>
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#include "xfrm_hash.h"
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DEFINE_MUTEX(xfrm_cfg_mutex);
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EXPORT_SYMBOL(xfrm_cfg_mutex);
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@ -409,62 +409,11 @@ static struct hlist_head *xfrm_policy_byidx __read_mostly;
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static unsigned int xfrm_idx_hmask __read_mostly;
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static unsigned int xfrm_policy_hashmax __read_mostly = 1 * 1024 * 1024;
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static inline unsigned int __idx_hash(u32 index, unsigned int hmask)
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{
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return (index ^ (index >> 8)) & hmask;
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}
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static inline unsigned int idx_hash(u32 index)
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{
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return __idx_hash(index, xfrm_idx_hmask);
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}
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static inline unsigned int __sel_hash(struct xfrm_selector *sel, unsigned short family, unsigned int hmask)
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{
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xfrm_address_t *daddr = &sel->daddr;
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xfrm_address_t *saddr = &sel->saddr;
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unsigned int h = 0;
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switch (family) {
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case AF_INET:
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if (sel->prefixlen_d != 32 ||
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sel->prefixlen_s != 32)
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return hmask + 1;
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h = ntohl(daddr->a4 ^ saddr->a4);
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break;
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case AF_INET6:
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if (sel->prefixlen_d != 128 ||
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sel->prefixlen_s != 128)
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return hmask + 1;
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h = ntohl(daddr->a6[2] ^ daddr->a6[3] ^
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saddr->a6[2] ^ saddr->a6[3]);
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break;
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};
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h ^= (h >> 16);
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return h & hmask;
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}
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static inline unsigned int __addr_hash(xfrm_address_t *daddr, xfrm_address_t *saddr, unsigned short family, unsigned int hmask)
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{
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unsigned int h = 0;
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switch (family) {
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case AF_INET:
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h = ntohl(daddr->a4 ^ saddr->a4);
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break;
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case AF_INET6:
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h = ntohl(daddr->a6[2] ^ daddr->a6[3] ^
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saddr->a6[2] ^ saddr->a6[3]);
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break;
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};
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h ^= (h >> 16);
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return h & hmask;
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}
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static struct hlist_head *policy_hash_bysel(struct xfrm_selector *sel, unsigned short family, int dir)
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{
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unsigned int hmask = xfrm_policy_bydst[dir].hmask;
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@ -483,34 +432,6 @@ static struct hlist_head *policy_hash_direct(xfrm_address_t *daddr, xfrm_address
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return xfrm_policy_bydst[dir].table + hash;
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}
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static struct hlist_head *xfrm_policy_hash_alloc(unsigned int sz)
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{
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struct hlist_head *n;
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if (sz <= PAGE_SIZE)
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n = kmalloc(sz, GFP_KERNEL);
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else if (hashdist)
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n = __vmalloc(sz, GFP_KERNEL, PAGE_KERNEL);
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else
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n = (struct hlist_head *)
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__get_free_pages(GFP_KERNEL, get_order(sz));
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if (n)
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memset(n, 0, sz);
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return n;
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}
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static void xfrm_policy_hash_free(struct hlist_head *n, unsigned int sz)
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{
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if (sz <= PAGE_SIZE)
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kfree(n);
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else if (hashdist)
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vfree(n);
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else
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free_pages((unsigned long)n, get_order(sz));
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}
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static void xfrm_dst_hash_transfer(struct hlist_head *list,
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struct hlist_head *ndsttable,
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unsigned int nhashmask)
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@ -553,7 +474,7 @@ static void xfrm_bydst_resize(int dir)
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unsigned int nhashmask = xfrm_new_hash_mask(hmask);
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unsigned int nsize = (nhashmask + 1) * sizeof(struct hlist_head);
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struct hlist_head *odst = xfrm_policy_bydst[dir].table;
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struct hlist_head *ndst = xfrm_policy_hash_alloc(nsize);
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struct hlist_head *ndst = xfrm_hash_alloc(nsize);
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int i;
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if (!ndst)
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@ -569,7 +490,7 @@ static void xfrm_bydst_resize(int dir)
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write_unlock_bh(&xfrm_policy_lock);
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xfrm_policy_hash_free(odst, (hmask + 1) * sizeof(struct hlist_head));
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xfrm_hash_free(odst, (hmask + 1) * sizeof(struct hlist_head));
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}
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static void xfrm_byidx_resize(int total)
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@ -578,7 +499,7 @@ static void xfrm_byidx_resize(int total)
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unsigned int nhashmask = xfrm_new_hash_mask(hmask);
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unsigned int nsize = (nhashmask + 1) * sizeof(struct hlist_head);
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struct hlist_head *oidx = xfrm_policy_byidx;
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struct hlist_head *nidx = xfrm_policy_hash_alloc(nsize);
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struct hlist_head *nidx = xfrm_hash_alloc(nsize);
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int i;
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if (!nidx)
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@ -594,7 +515,7 @@ static void xfrm_byidx_resize(int total)
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write_unlock_bh(&xfrm_policy_lock);
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xfrm_policy_hash_free(oidx, (hmask + 1) * sizeof(struct hlist_head));
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xfrm_hash_free(oidx, (hmask + 1) * sizeof(struct hlist_head));
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}
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static inline int xfrm_bydst_should_resize(int dir, int *total)
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@ -2071,7 +1992,7 @@ static void __init xfrm_policy_init(void)
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hmask = 8 - 1;
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sz = (hmask+1) * sizeof(struct hlist_head);
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xfrm_policy_byidx = xfrm_policy_hash_alloc(sz);
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xfrm_policy_byidx = xfrm_hash_alloc(sz);
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xfrm_idx_hmask = hmask;
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if (!xfrm_policy_byidx)
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panic("XFRM: failed to allocate byidx hash\n");
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@ -2082,7 +2003,7 @@ static void __init xfrm_policy_init(void)
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INIT_HLIST_HEAD(&xfrm_policy_inexact[dir]);
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htab = &xfrm_policy_bydst[dir];
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htab->table = xfrm_policy_hash_alloc(sz);
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htab->table = xfrm_hash_alloc(sz);
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htab->hmask = hmask;
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if (!htab->table)
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panic("XFRM: failed to allocate bydst hash\n");
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@ -18,11 +18,11 @@
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#include <linux/pfkeyv2.h>
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#include <linux/ipsec.h>
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#include <linux/module.h>
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#include <linux/bootmem.h>
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#include <linux/vmalloc.h>
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#include <linux/cache.h>
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#include <asm/uaccess.h>
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#include "xfrm_hash.h"
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struct sock *xfrm_nl;
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EXPORT_SYMBOL(xfrm_nl);
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@ -55,44 +55,6 @@ static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024;
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static unsigned int xfrm_state_num;
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static unsigned int xfrm_state_genid;
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static inline unsigned int __xfrm4_addr_hash(xfrm_address_t *addr)
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{
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return ntohl(addr->a4);
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}
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static inline unsigned int __xfrm6_addr_hash(xfrm_address_t *addr)
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{
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return ntohl(addr->a6[2]^addr->a6[3]);
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}
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static inline unsigned int __xfrm4_daddr_saddr_hash(xfrm_address_t *daddr, xfrm_address_t *saddr)
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{
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return ntohl(daddr->a4 ^ saddr->a4);
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}
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static inline unsigned int __xfrm6_daddr_saddr_hash(xfrm_address_t *daddr, xfrm_address_t *saddr)
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{
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return ntohl(daddr->a6[2] ^ daddr->a6[3] ^
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saddr->a6[2] ^ saddr->a6[3]);
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}
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static inline unsigned int __xfrm_dst_hash(xfrm_address_t *daddr,
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xfrm_address_t *saddr,
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u32 reqid, unsigned short family,
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unsigned int hmask)
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{
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unsigned int h = family ^ reqid;
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switch (family) {
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case AF_INET:
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h ^= __xfrm4_daddr_saddr_hash(daddr, saddr);
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break;
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case AF_INET6:
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h ^= __xfrm6_daddr_saddr_hash(daddr, saddr);
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break;
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};
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return (h ^ (h >> 16)) & hmask;
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}
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static inline unsigned int xfrm_dst_hash(xfrm_address_t *daddr,
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xfrm_address_t *saddr,
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u32 reqid,
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@ -101,76 +63,18 @@ static inline unsigned int xfrm_dst_hash(xfrm_address_t *daddr,
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return __xfrm_dst_hash(daddr, saddr, reqid, family, xfrm_state_hmask);
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}
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static inline unsigned __xfrm_src_hash(xfrm_address_t *addr, unsigned short family,
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unsigned int hmask)
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{
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unsigned int h = family;
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switch (family) {
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case AF_INET:
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h ^= __xfrm4_addr_hash(addr);
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break;
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case AF_INET6:
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h ^= __xfrm6_addr_hash(addr);
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break;
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};
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return (h ^ (h >> 16)) & hmask;
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}
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static inline unsigned xfrm_src_hash(xfrm_address_t *addr, unsigned short family)
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static inline unsigned int xfrm_src_hash(xfrm_address_t *addr,
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unsigned short family)
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{
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return __xfrm_src_hash(addr, family, xfrm_state_hmask);
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}
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static inline unsigned int
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__xfrm_spi_hash(xfrm_address_t *daddr, u32 spi, u8 proto,
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unsigned short family, unsigned int hmask)
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{
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unsigned int h = spi ^ proto;
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switch (family) {
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case AF_INET:
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h ^= __xfrm4_addr_hash(daddr);
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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 @@ static void xfrm_hash_resize(void *__unused)
|
|||
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 @@ static void xfrm_hash_resize(void *__unused)
|
|||
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 @@ void __init xfrm_state_init(void)
|
|||
|
||||
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);
|
||||
|
|
|
|||
Loading…
Reference in a new issue