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>
diff --git a/include/net/netns/xfrm.h b/include/net/netns/xfrm.h
index 6648924..5cd7d06 100644
--- a/include/net/netns/xfrm.h
+++ b/include/net/netns/xfrm.h
@@ -27,6 +27,7 @@
wait_queue_head_t km_waitq;
struct list_head policy_all;
+ struct hlist_head *policy_byidx;
};
#endif
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index aabc7f2..700cdd7 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -329,7 +329,6 @@
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 @@
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 @@
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 @@
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 @@
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 @@
*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 @@
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 @@
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 @@
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)