netns xfrm: per-netns xfrm_state_byspi hash

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 13 insertions, 8 deletions

diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 52d828bdf3d..66ca1ef7f8e 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -44,7 +44,6 @@ u32 sysctl_xfrm_acq_expires __read_mostly = 30;
 
 static DEFINE_SPINLOCK(xfrm_state_lock);
 
-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;
@@ -154,12 +153,12 @@ static void xfrm_hash_resize(struct work_struct *__unused)
 
         odst = init_net.xfrm.state_bydst;
         osrc = init_net.xfrm.state_bysrc;
-        ospi = xfrm_state_byspi;
+        ospi = init_net.xfrm.state_byspi;
         ohashmask = xfrm_state_hmask;
 
         init_net.xfrm.state_bydst = ndst;
         init_net.xfrm.state_bysrc = nsrc;
-        xfrm_state_byspi = nspi;
+        init_net.xfrm.state_byspi = nspi;
         xfrm_state_hmask = nhashmask;
 
         spin_unlock_bh(&xfrm_state_lock);
@@ -679,7 +678,7 @@ static struct xfrm_state *__xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi,
         struct xfrm_state *x;
         struct hlist_node *entry;
 
-        hlist_for_each_entry(x, entry, xfrm_state_byspi+h, byspi) {
+        hlist_for_each_entry(x, entry, init_net.xfrm.state_byspi+h, byspi) {
                 if (x->props.family != family ||
                     x->id.spi       != spi ||
                     x->id.proto     != proto)
@@ -852,7 +851,7 @@ xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
                         hlist_add_head(&x->bysrc, init_net.xfrm.state_bysrc+h);
                         if (x->id.spi) {
                                 h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, family);
-                                hlist_add_head(&x->byspi, xfrm_state_byspi+h);
+                                hlist_add_head(&x->byspi, init_net.xfrm.state_byspi+h);
                         }
                         x->lft.hard_add_expires_seconds = sysctl_xfrm_acq_expires;
                         x->timer.expires = jiffies + sysctl_xfrm_acq_expires*HZ;
@@ -928,7 +927,7 @@ static void __xfrm_state_insert(struct xfrm_state *x)
                 h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto,
                                   x->props.family);
 
-                hlist_add_head(&x->byspi, xfrm_state_byspi+h);
+                hlist_add_head(&x->byspi, init_net.xfrm.state_byspi+h);
         }
 
         mod_timer(&x->timer, jiffies + HZ);
@@ -1524,7 +1523,7 @@ int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high)
         if (x->id.spi) {
                 spin_lock_bh(&xfrm_state_lock);
                 h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, x->props.family);
-                hlist_add_head(&x->byspi, xfrm_state_byspi+h);
+                hlist_add_head(&x->byspi, init_net.xfrm.state_byspi+h);
                 spin_unlock_bh(&xfrm_state_lock);
 
                 err = 0;
@@ -2086,12 +2085,16 @@ int __net_init xfrm_state_init(struct net *net)
         net->xfrm.state_bysrc = xfrm_hash_alloc(sz);
         if (!net->xfrm.state_bysrc)
                 goto out_bysrc;
-        xfrm_state_byspi = xfrm_hash_alloc(sz);
+        net->xfrm.state_byspi = xfrm_hash_alloc(sz);
+        if (!net->xfrm.state_byspi)
+                goto out_byspi;
         xfrm_state_hmask = ((sz / sizeof(struct hlist_head)) - 1);
 
         INIT_WORK(&xfrm_state_gc_work, xfrm_state_gc_task);
         return 0;
 
+out_byspi:
+        xfrm_hash_free(net->xfrm.state_bysrc, sz);
 out_bysrc:
         xfrm_hash_free(net->xfrm.state_bydst, sz);
 out_bydst:
@@ -2105,6 +2108,8 @@ void xfrm_state_fini(struct net *net)
         WARN_ON(!list_empty(&net->xfrm.state_all));
 
         sz = (xfrm_state_hmask + 1) * sizeof(struct hlist_head);
+        WARN_ON(!hlist_empty(net->xfrm.state_byspi));
+        xfrm_hash_free(net->xfrm.state_byspi, sz);
         WARN_ON(!hlist_empty(net->xfrm.state_bysrc));
         xfrm_hash_free(net->xfrm.state_bysrc, sz);
         WARN_ON(!hlist_empty(net->xfrm.state_bydst));