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netns xfrm: per-netns xfrm_policy_byidx hash 

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexey Dobriyan 2008-11-25 17:22:35 -08:00 committed by David S. Miller
parent adfcf0b27e
commit 93b851c1c9
2 changed files with 19 additions and 10 deletions
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1
include/net/netns/xfrm.h
View File

@ -27,6 +27,7 @@ struct netns_xfrm {
wait_queue_head_t km_waitq;
struct list_head policy_all;
struct hlist_head *policy_byidx;
};
#endif

28
net/xfrm/xfrm_policy.c
View File

@ -329,7 +329,6 @@ struct xfrm_policy_hash {
static struct hlist_head xfrm_policy_inexact[XFRM_POLICY_MAX*2];
static struct xfrm_policy_hash xfrm_policy_bydst[XFRM_POLICY_MAX*2] __read_mostly;
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;
@ -438,7 +437,7 @@ static void xfrm_byidx_resize(int total)
unsigned int hmask = xfrm_idx_hmask;
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 *oidx = init_net.xfrm.policy_byidx;
struct hlist_head *nidx = xfrm_hash_alloc(nsize);
int i;
@ -450,7 +449,7 @@ static void xfrm_byidx_resize(int total)
for (i = hmask; i >= 0; i--)
xfrm_idx_hash_transfer(oidx + i, nidx, nhashmask);
xfrm_policy_byidx = nidx;
init_net.xfrm.policy_byidx = nidx;
xfrm_idx_hmask = nhashmask;
write_unlock_bh(&xfrm_policy_lock);
@ -536,7 +535,7 @@ static u32 xfrm_gen_index(int dir)
idx_generator += 8;
if (idx == 0)
idx = 8;
list = xfrm_policy_byidx + idx_hash(idx);
list = init_net.xfrm.policy_byidx + idx_hash(idx);
found = 0;
hlist_for_each_entry(p, entry, list, byidx) {
if (p->index == idx) {
@ -609,7 +608,7 @@ int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl)
xfrm_policy_count[dir]--;
}
policy->index = delpol ? delpol->index : xfrm_gen_index(dir);
hlist_add_head(&policy->byidx, xfrm_policy_byidx+idx_hash(policy->index));
hlist_add_head(&policy->byidx, init_net.xfrm.policy_byidx+idx_hash(policy->index));
policy->curlft.add_time = get_seconds();
policy->curlft.use_time = 0;
if (!mod_timer(&policy->timer, jiffies + HZ))
@ -711,7 +710,7 @@ struct xfrm_policy *xfrm_policy_byid(u8 type, int dir, u32 id, int delete,
*err = 0;
write_lock_bh(&xfrm_policy_lock);
chain = xfrm_policy_byidx + idx_hash(id);
chain = init_net.xfrm.policy_byidx + idx_hash(id);
ret = NULL;
hlist_for_each_entry(pol, entry, chain, byidx) {
if (pol->type == type && pol->index == id) {
@ -1087,7 +1086,7 @@ static void __xfrm_policy_link(struct xfrm_policy *pol, int dir)
list_add(&pol->walk.all, &init_net.xfrm.policy_all);
hlist_add_head(&pol->bydst, chain);
hlist_add_head(&pol->byidx, xfrm_policy_byidx+idx_hash(pol->index));
hlist_add_head(&pol->byidx, init_net.xfrm.policy_byidx+idx_hash(pol->index));
xfrm_policy_count[dir]++;
xfrm_pol_hold(pol);
@ -2408,10 +2407,10 @@ static int __net_init xfrm_policy_init(struct net *net)
hmask = 8 - 1;
sz = (hmask+1) * sizeof(struct hlist_head);
xfrm_policy_byidx = xfrm_hash_alloc(sz);
net->xfrm.policy_byidx = xfrm_hash_alloc(sz);
if (!net->xfrm.policy_byidx)
goto out_byidx;
xfrm_idx_hmask = hmask;
if (!xfrm_policy_byidx)
panic("XFRM: failed to allocate byidx hash\n");
for (dir = 0; dir < XFRM_POLICY_MAX * 2; dir++) {
struct xfrm_policy_hash *htab;
@ -2429,11 +2428,20 @@ static int __net_init xfrm_policy_init(struct net *net)
if (net_eq(net, &init_net))
register_netdevice_notifier(&xfrm_dev_notifier);
return 0;
out_byidx:
return -ENOMEM;
}
static void xfrm_policy_fini(struct net *net)
{
unsigned int sz;
WARN_ON(!list_empty(&net->xfrm.policy_all));
sz = (xfrm_idx_hmask + 1) * sizeof(struct hlist_head);
WARN_ON(!hlist_empty(net->xfrm.policy_byidx));
xfrm_hash_free(net->xfrm.policy_byidx, sz);
}
static int __net_init xfrm_net_init(struct net *net)