[XFRM]: Dynamic xfrm_state hash table sizing.
The grow algorithm is simple, we grow if: 1) we see a hash chain collision at insert, and 2) we haven't hit the hash size limit (currently 1*1024*1024 slots), and 3) the number of xfrm_state objects is > the current hash mask All of this needs some tweaking. Remove __initdata from "hashdist" so we can use it safely at run time. Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
parent
8f126e37c0
commit
f034b5d4ef
|
@ -114,7 +114,7 @@ extern void *__init alloc_large_system_hash(const char *tablename,
|
|||
#else
|
||||
#define HASHDIST_DEFAULT 0
|
||||
#endif
|
||||
extern int __initdata hashdist; /* Distribute hashes across NUMA nodes? */
|
||||
extern int hashdist; /* Distribute hashes across NUMA nodes? */
|
||||
|
||||
|
||||
#endif /* _LINUX_BOOTMEM_H */
|
||||
|
|
|
@ -2363,7 +2363,7 @@ int percpu_pagelist_fraction_sysctl_handler(ctl_table *table, int write,
|
|||
return 0;
|
||||
}
|
||||
|
||||
__initdata int hashdist = HASHDIST_DEFAULT;
|
||||
int hashdist = HASHDIST_DEFAULT;
|
||||
|
||||
#ifdef CONFIG_NUMA
|
||||
static int __init set_hashdist(char *str)
|
||||
|
|
|
@ -18,6 +18,9 @@
|
|||
#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>
|
||||
|
||||
struct sock *xfrm_nl;
|
||||
|
@ -38,102 +41,230 @@ EXPORT_SYMBOL(sysctl_xfrm_aevent_rseqth);
|
|||
|
||||
static DEFINE_SPINLOCK(xfrm_state_lock);
|
||||
|
||||
#define XFRM_DST_HSIZE 1024
|
||||
|
||||
/* Hash table to find appropriate SA towards given target (endpoint
|
||||
* of tunnel or destination of transport mode) allowed by selector.
|
||||
*
|
||||
* Main use is finding SA after policy selected tunnel or transport mode.
|
||||
* Also, it can be used by ah/esp icmp error handler to find offending SA.
|
||||
*/
|
||||
static struct hlist_head xfrm_state_bydst[XFRM_DST_HSIZE];
|
||||
static struct hlist_head xfrm_state_bysrc[XFRM_DST_HSIZE];
|
||||
static struct hlist_head xfrm_state_byspi[XFRM_DST_HSIZE];
|
||||
static struct hlist_head *xfrm_state_bydst __read_mostly;
|
||||
static struct hlist_head *xfrm_state_bysrc __read_mostly;
|
||||
static struct hlist_head *xfrm_state_byspi __read_mostly;
|
||||
static unsigned int xfrm_state_hmask __read_mostly;
|
||||
static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024;
|
||||
static unsigned int xfrm_state_num;
|
||||
|
||||
static __inline__
|
||||
unsigned __xfrm4_dst_hash(xfrm_address_t *addr)
|
||||
static inline unsigned int __xfrm4_dst_hash(xfrm_address_t *addr, unsigned int hmask)
|
||||
{
|
||||
unsigned h;
|
||||
unsigned int h;
|
||||
h = ntohl(addr->a4);
|
||||
h = (h ^ (h>>16)) % XFRM_DST_HSIZE;
|
||||
h = (h ^ (h>>16)) & hmask;
|
||||
return h;
|
||||
}
|
||||
|
||||
static __inline__
|
||||
unsigned __xfrm6_dst_hash(xfrm_address_t *addr)
|
||||
static inline unsigned int __xfrm6_dst_hash(xfrm_address_t *addr, unsigned int hmask)
|
||||
{
|
||||
unsigned h;
|
||||
unsigned int h;
|
||||
h = ntohl(addr->a6[2]^addr->a6[3]);
|
||||
h = (h ^ (h>>16)) % XFRM_DST_HSIZE;
|
||||
h = (h ^ (h>>16)) & hmask;
|
||||
return h;
|
||||
}
|
||||
|
||||
static __inline__
|
||||
unsigned __xfrm4_src_hash(xfrm_address_t *addr)
|
||||
static inline unsigned int __xfrm4_src_hash(xfrm_address_t *addr, unsigned int hmask)
|
||||
{
|
||||
return __xfrm4_dst_hash(addr);
|
||||
return __xfrm4_dst_hash(addr, hmask);
|
||||
}
|
||||
|
||||
static __inline__
|
||||
unsigned __xfrm6_src_hash(xfrm_address_t *addr)
|
||||
static inline unsigned int __xfrm6_src_hash(xfrm_address_t *addr, unsigned int hmask)
|
||||
{
|
||||
return __xfrm6_dst_hash(addr);
|
||||
return __xfrm6_dst_hash(addr, hmask);
|
||||
}
|
||||
|
||||
static __inline__
|
||||
unsigned xfrm_src_hash(xfrm_address_t *addr, unsigned short family)
|
||||
static inline unsigned __xfrm_src_hash(xfrm_address_t *addr, unsigned short family, unsigned int hmask)
|
||||
{
|
||||
switch (family) {
|
||||
case AF_INET:
|
||||
return __xfrm4_src_hash(addr);
|
||||
return __xfrm4_src_hash(addr, hmask);
|
||||
case AF_INET6:
|
||||
return __xfrm6_src_hash(addr);
|
||||
return __xfrm6_src_hash(addr, hmask);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __inline__
|
||||
unsigned xfrm_dst_hash(xfrm_address_t *addr, unsigned short family)
|
||||
static inline unsigned xfrm_src_hash(xfrm_address_t *addr, unsigned short family)
|
||||
{
|
||||
return __xfrm_src_hash(addr, family, xfrm_state_hmask);
|
||||
}
|
||||
|
||||
static inline unsigned int __xfrm_dst_hash(xfrm_address_t *addr, unsigned short family, unsigned int hmask)
|
||||
{
|
||||
switch (family) {
|
||||
case AF_INET:
|
||||
return __xfrm4_dst_hash(addr);
|
||||
return __xfrm4_dst_hash(addr, hmask);
|
||||
case AF_INET6:
|
||||
return __xfrm6_dst_hash(addr);
|
||||
return __xfrm6_dst_hash(addr, hmask);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __inline__
|
||||
unsigned __xfrm4_spi_hash(xfrm_address_t *addr, u32 spi, u8 proto)
|
||||
static inline unsigned int xfrm_dst_hash(xfrm_address_t *addr, unsigned short family)
|
||||
{
|
||||
unsigned h;
|
||||
return __xfrm_dst_hash(addr, family, xfrm_state_hmask);
|
||||
}
|
||||
|
||||
static inline unsigned int __xfrm4_spi_hash(xfrm_address_t *addr, u32 spi, u8 proto,
|
||||
unsigned int hmask)
|
||||
{
|
||||
unsigned int h;
|
||||
h = ntohl(addr->a4^spi^proto);
|
||||
h = (h ^ (h>>10) ^ (h>>20)) % XFRM_DST_HSIZE;
|
||||
h = (h ^ (h>>10) ^ (h>>20)) & hmask;
|
||||
return h;
|
||||
}
|
||||
|
||||
static __inline__
|
||||
unsigned __xfrm6_spi_hash(xfrm_address_t *addr, u32 spi, u8 proto)
|
||||
static inline unsigned int __xfrm6_spi_hash(xfrm_address_t *addr, u32 spi, u8 proto,
|
||||
unsigned int hmask)
|
||||
{
|
||||
unsigned h;
|
||||
unsigned int h;
|
||||
h = ntohl(addr->a6[2]^addr->a6[3]^spi^proto);
|
||||
h = (h ^ (h>>10) ^ (h>>20)) % XFRM_DST_HSIZE;
|
||||
h = (h ^ (h>>10) ^ (h>>20)) & hmask;
|
||||
return h;
|
||||
}
|
||||
|
||||
static __inline__
|
||||
unsigned xfrm_spi_hash(xfrm_address_t *addr, u32 spi, u8 proto, unsigned short family)
|
||||
static inline
|
||||
unsigned __xfrm_spi_hash(xfrm_address_t *addr, u32 spi, u8 proto, unsigned short family,
|
||||
unsigned int hmask)
|
||||
{
|
||||
switch (family) {
|
||||
case AF_INET:
|
||||
return __xfrm4_spi_hash(addr, spi, proto);
|
||||
return __xfrm4_spi_hash(addr, spi, proto, hmask);
|
||||
case AF_INET6:
|
||||
return __xfrm6_spi_hash(addr, spi, proto);
|
||||
return __xfrm6_spi_hash(addr, spi, proto, hmask);
|
||||
}
|
||||
return 0; /*XXX*/
|
||||
}
|
||||
|
||||
static inline unsigned int
|
||||
xfrm_spi_hash(xfrm_address_t *addr, u32 spi, u8 proto, unsigned short family)
|
||||
{
|
||||
return __xfrm_spi_hash(addr, 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,
|
||||
struct hlist_head *nspitable,
|
||||
unsigned int nhashmask)
|
||||
{
|
||||
struct hlist_node *entry, *tmp;
|
||||
struct xfrm_state *x;
|
||||
|
||||
hlist_for_each_entry_safe(x, entry, tmp, list, bydst) {
|
||||
unsigned int h;
|
||||
|
||||
h = __xfrm_dst_hash(&x->id.daddr, x->props.family, nhashmask);
|
||||
hlist_add_head(&x->bydst, ndsttable+h);
|
||||
|
||||
h = __xfrm_src_hash(&x->props.saddr, x->props.family,
|
||||
nhashmask);
|
||||
hlist_add_head(&x->bysrc, nsrctable+h);
|
||||
|
||||
h = __xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto,
|
||||
x->props.family, nhashmask);
|
||||
hlist_add_head(&x->byspi, nspitable+h);
|
||||
}
|
||||
}
|
||||
|
||||
static unsigned long xfrm_hash_new_size(void)
|
||||
{
|
||||
return ((xfrm_state_hmask + 1) << 1) *
|
||||
sizeof(struct hlist_head);
|
||||
}
|
||||
|
||||
static DEFINE_MUTEX(hash_resize_mutex);
|
||||
|
||||
static void xfrm_hash_resize(void *__unused)
|
||||
{
|
||||
struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi;
|
||||
unsigned long nsize, osize;
|
||||
unsigned int nhashmask, ohashmask;
|
||||
int i;
|
||||
|
||||
mutex_lock(&hash_resize_mutex);
|
||||
|
||||
nsize = xfrm_hash_new_size();
|
||||
ndst = xfrm_state_hash_alloc(nsize);
|
||||
if (!ndst)
|
||||
goto out_unlock;
|
||||
nsrc = xfrm_state_hash_alloc(nsize);
|
||||
if (!nsrc) {
|
||||
xfrm_state_hash_free(ndst, nsize);
|
||||
goto out_unlock;
|
||||
}
|
||||
nspi = xfrm_state_hash_alloc(nsize);
|
||||
if (!nspi) {
|
||||
xfrm_state_hash_free(ndst, nsize);
|
||||
xfrm_state_hash_free(nsrc, nsize);
|
||||
goto out_unlock;
|
||||
}
|
||||
|
||||
spin_lock_bh(&xfrm_state_lock);
|
||||
|
||||
nhashmask = (nsize / sizeof(struct hlist_head)) - 1U;
|
||||
for (i = xfrm_state_hmask; i >= 0; i--)
|
||||
xfrm_hash_transfer(xfrm_state_bydst+i, ndst, nsrc, nspi,
|
||||
nhashmask);
|
||||
|
||||
odst = xfrm_state_bydst;
|
||||
osrc = xfrm_state_bysrc;
|
||||
ospi = xfrm_state_byspi;
|
||||
ohashmask = xfrm_state_hmask;
|
||||
|
||||
xfrm_state_bydst = ndst;
|
||||
xfrm_state_bysrc = nsrc;
|
||||
xfrm_state_byspi = nspi;
|
||||
xfrm_state_hmask = nhashmask;
|
||||
|
||||
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);
|
||||
|
||||
out_unlock:
|
||||
mutex_unlock(&hash_resize_mutex);
|
||||
}
|
||||
|
||||
static DECLARE_WORK(xfrm_hash_work, xfrm_hash_resize, NULL);
|
||||
|
||||
DECLARE_WAIT_QUEUE_HEAD(km_waitq);
|
||||
EXPORT_SYMBOL(km_waitq);
|
||||
|
||||
|
@ -335,6 +466,7 @@ int __xfrm_state_delete(struct xfrm_state *x)
|
|||
hlist_del(&x->byspi);
|
||||
__xfrm_state_put(x);
|
||||
}
|
||||
xfrm_state_num--;
|
||||
spin_unlock(&xfrm_state_lock);
|
||||
if (del_timer(&x->timer))
|
||||
__xfrm_state_put(x);
|
||||
|
@ -380,7 +512,7 @@ void xfrm_state_flush(u8 proto)
|
|||
int i;
|
||||
|
||||
spin_lock_bh(&xfrm_state_lock);
|
||||
for (i = 0; i < XFRM_DST_HSIZE; i++) {
|
||||
for (i = 0; i < xfrm_state_hmask; i++) {
|
||||
struct hlist_node *entry;
|
||||
struct xfrm_state *x;
|
||||
restart:
|
||||
|
@ -611,7 +743,7 @@ out:
|
|||
|
||||
static void __xfrm_state_insert(struct xfrm_state *x)
|
||||
{
|
||||
unsigned h = xfrm_dst_hash(&x->id.daddr, x->props.family);
|
||||
unsigned int h = xfrm_dst_hash(&x->id.daddr, x->props.family);
|
||||
|
||||
hlist_add_head(&x->bydst, xfrm_state_bydst+h);
|
||||
xfrm_state_hold(x);
|
||||
|
@ -637,6 +769,13 @@ static void __xfrm_state_insert(struct xfrm_state *x)
|
|||
xfrm_state_hold(x);
|
||||
|
||||
wake_up(&km_waitq);
|
||||
|
||||
xfrm_state_num++;
|
||||
|
||||
if (x->bydst.next != NULL &&
|
||||
(xfrm_state_hmask + 1) < xfrm_state_hashmax &&
|
||||
xfrm_state_num > xfrm_state_hmask)
|
||||
schedule_work(&xfrm_hash_work);
|
||||
}
|
||||
|
||||
void xfrm_state_insert(struct xfrm_state *x)
|
||||
|
@ -984,7 +1123,7 @@ static struct xfrm_state *__xfrm_find_acq_byseq(u32 seq)
|
|||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < XFRM_DST_HSIZE; i++) {
|
||||
for (i = 0; i <= xfrm_state_hmask; i++) {
|
||||
struct hlist_node *entry;
|
||||
struct xfrm_state *x;
|
||||
|
||||
|
@ -1026,7 +1165,7 @@ EXPORT_SYMBOL(xfrm_get_acqseq);
|
|||
void
|
||||
xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi)
|
||||
{
|
||||
u32 h;
|
||||
unsigned int h;
|
||||
struct xfrm_state *x0;
|
||||
|
||||
if (x->id.spi)
|
||||
|
@ -1074,7 +1213,7 @@ int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*),
|
|||
int err = 0;
|
||||
|
||||
spin_lock_bh(&xfrm_state_lock);
|
||||
for (i = 0; i < XFRM_DST_HSIZE; i++) {
|
||||
for (i = 0; i <= xfrm_state_hmask; i++) {
|
||||
hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) {
|
||||
if (xfrm_id_proto_match(x->id.proto, proto))
|
||||
count++;
|
||||
|
@ -1085,7 +1224,7 @@ int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*),
|
|||
goto out;
|
||||
}
|
||||
|
||||
for (i = 0; i < XFRM_DST_HSIZE; i++) {
|
||||
for (i = 0; i <= xfrm_state_hmask; i++) {
|
||||
hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) {
|
||||
if (!xfrm_id_proto_match(x->id.proto, proto))
|
||||
continue;
|
||||
|
@ -1531,13 +1670,17 @@ EXPORT_SYMBOL(xfrm_init_state);
|
|||
|
||||
void __init xfrm_state_init(void)
|
||||
{
|
||||
int i;
|
||||
unsigned int sz;
|
||||
|
||||
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);
|
||||
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);
|
||||
|
||||
for (i=0; i<XFRM_DST_HSIZE; i++) {
|
||||
INIT_HLIST_HEAD(&xfrm_state_bydst[i]);
|
||||
INIT_HLIST_HEAD(&xfrm_state_bysrc[i]);
|
||||
INIT_HLIST_HEAD(&xfrm_state_byspi[i]);
|
||||
}
|
||||
INIT_WORK(&xfrm_state_gc_work, xfrm_state_gc_task, NULL);
|
||||
}
|
||||
|
||||
|
|
Loading…
Reference in a new issue