diff options
author | David S. Miller <davem@sunset.davemloft.net> | 2006-08-24 11:50:50 (GMT) |
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committer | David S. Miller <davem@sunset.davemloft.net> | 2006-09-22 22:08:49 (GMT) |
commit | 44e36b42a8378be1dcf7e6f8a1cb2710a8903387 (patch) | |
tree | 2c057957a4e4dc7f679ac671a9f091f3fe366b92 /net/xfrm | |
parent | 2518c7c2b3d7f0a6b302b4efe17c911f8dd4049f (diff) | |
download | linux-44e36b42a8378be1dcf7e6f8a1cb2710a8903387.tar.xz |
[XFRM]: Extract common hashing code into xfrm_hash.[ch]
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/xfrm')
-rw-r--r-- | net/xfrm/Makefile | 3 | ||||
-rw-r--r-- | net/xfrm/xfrm_hash.c | 41 | ||||
-rw-r--r-- | net/xfrm/xfrm_hash.h | 128 | ||||
-rw-r--r-- | net/xfrm/xfrm_policy.c | 95 | ||||
-rw-r--r-- | net/xfrm/xfrm_state.c | 128 |
5 files changed, 195 insertions, 200 deletions
diff --git a/net/xfrm/Makefile b/net/xfrm/Makefile index 693aac1..de3c1a6 100644 --- a/net/xfrm/Makefile +++ b/net/xfrm/Makefile @@ -2,6 +2,7 @@ # Makefile for the XFRM subsystem. # -obj-$(CONFIG_XFRM) := xfrm_policy.o xfrm_state.o xfrm_input.o xfrm_algo.o +obj-$(CONFIG_XFRM) := xfrm_policy.o xfrm_state.o xfrm_hash.o \ + xfrm_input.o xfrm_algo.o obj-$(CONFIG_XFRM_USER) += xfrm_user.o diff --git a/net/xfrm/xfrm_hash.c b/net/xfrm/xfrm_hash.c new file mode 100644 index 0000000..37643bb --- /dev/null +++ b/net/xfrm/xfrm_hash.c @@ -0,0 +1,41 @@ +/* xfrm_hash.c: Common hash table code. + * + * Copyright (C) 2006 David S. Miller (davem@davemloft.net) + */ + +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/bootmem.h> +#include <linux/vmalloc.h> +#include <linux/slab.h> +#include <linux/xfrm.h> + +#include "xfrm_hash.h" + +struct hlist_head *xfrm_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; +} + +void xfrm_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)); +} diff --git a/net/xfrm/xfrm_hash.h b/net/xfrm/xfrm_hash.h new file mode 100644 index 0000000..d3abb0b --- /dev/null +++ b/net/xfrm/xfrm_hash.h @@ -0,0 +1,128 @@ +#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 */ diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c index 087a544..b446ca3 100644 --- a/net/xfrm/xfrm_policy.c +++ b/net/xfrm/xfrm_policy.c @@ -22,12 +22,12 @@ #include <linux/netdevice.h> #include <linux/netfilter.h> #include <linux/module.h> -#include <linux/bootmem.h> -#include <linux/vmalloc.h> #include <linux/cache.h> #include <net/xfrm.h> #include <net/ip.h> +#include "xfrm_hash.h" + DEFINE_MUTEX(xfrm_cfg_mutex); EXPORT_SYMBOL(xfrm_cfg_mutex); @@ -409,62 +409,11 @@ static struct hlist_head *xfrm_policy_byidx __read_mostly; static unsigned int xfrm_idx_hmask __read_mostly; static unsigned int xfrm_policy_hashmax __read_mostly = 1 * 1024 * 1024; -static inline unsigned int __idx_hash(u32 index, unsigned int hmask) -{ - return (index ^ (index >> 8)) & hmask; -} - static inline unsigned int idx_hash(u32 index) { return __idx_hash(index, xfrm_idx_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 = ntohl(daddr->a4 ^ saddr->a4); - break; - - case AF_INET6: - if (sel->prefixlen_d != 128 || - sel->prefixlen_s != 128) - return hmask + 1; - - h = ntohl(daddr->a6[2] ^ daddr->a6[3] ^ - saddr->a6[2] ^ saddr->a6[3]); - 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 = ntohl(daddr->a4 ^ saddr->a4); - break; - - case AF_INET6: - h = ntohl(daddr->a6[2] ^ daddr->a6[3] ^ - saddr->a6[2] ^ saddr->a6[3]); - break; - }; - h ^= (h >> 16); - return h & hmask; -} - static struct hlist_head *policy_hash_bysel(struct xfrm_selector *sel, unsigned short family, int dir) { unsigned int hmask = xfrm_policy_bydst[dir].hmask; @@ -483,34 +432,6 @@ static struct hlist_head *policy_hash_direct(xfrm_address_t *daddr, xfrm_address return xfrm_policy_bydst[dir].table + hash; } -static struct hlist_head *xfrm_policy_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_policy_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_dst_hash_transfer(struct hlist_head *list, struct hlist_head *ndsttable, unsigned int nhashmask) @@ -553,7 +474,7 @@ static void xfrm_bydst_resize(int dir) unsigned int nhashmask = xfrm_new_hash_mask(hmask); unsigned int nsize = (nhashmask + 1) * sizeof(struct hlist_head); struct hlist_head *odst = xfrm_policy_bydst[dir].table; - struct hlist_head *ndst = xfrm_policy_hash_alloc(nsize); + struct hlist_head *ndst = xfrm_hash_alloc(nsize); int i; if (!ndst) @@ -569,7 +490,7 @@ static void xfrm_bydst_resize(int dir) write_unlock_bh(&xfrm_policy_lock); - xfrm_policy_hash_free(odst, (hmask + 1) * sizeof(struct hlist_head)); + xfrm_hash_free(odst, (hmask + 1) * sizeof(struct hlist_head)); } static void xfrm_byidx_resize(int total) @@ -578,7 +499,7 @@ static void xfrm_byidx_resize(int total) unsigned int nhashmask = xfrm_new_hash_mask(hmask); unsigned int nsize = (nhashmask + 1) * sizeof(struct hlist_head); struct hlist_head *oidx = xfrm_policy_byidx; - struct hlist_head *nidx = xfrm_policy_hash_alloc(nsize); + struct hlist_head *nidx = xfrm_hash_alloc(nsize); int i; if (!nidx) @@ -594,7 +515,7 @@ static void xfrm_byidx_resize(int total) write_unlock_bh(&xfrm_policy_lock); - xfrm_policy_hash_free(oidx, (hmask + 1) * sizeof(struct hlist_head)); + xfrm_hash_free(oidx, (hmask + 1) * sizeof(struct hlist_head)); } static inline int xfrm_bydst_should_resize(int dir, int *total) @@ -2071,7 +1992,7 @@ static void __init xfrm_policy_init(void) hmask = 8 - 1; sz = (hmask+1) * sizeof(struct hlist_head); - xfrm_policy_byidx = xfrm_policy_hash_alloc(sz); + xfrm_policy_byidx = xfrm_hash_alloc(sz); xfrm_idx_hmask = hmask; if (!xfrm_policy_byidx) panic("XFRM: failed to allocate byidx hash\n"); @@ -2082,7 +2003,7 @@ static void __init xfrm_policy_init(void) INIT_HLIST_HEAD(&xfrm_policy_inexact[dir]); htab = &xfrm_policy_bydst[dir]; - htab->table = xfrm_policy_hash_alloc(sz); + htab->table = xfrm_hash_alloc(sz); htab->hmask = hmask; if (!htab->table) panic("XFRM: failed to allocate bydst hash\n"); 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_hashmax __read_mostly = 1 * 1024 * 1024; 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 @@ static inline unsigned int xfrm_dst_hash(xfrm_address_t *daddr, 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 @@ 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); |