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path: root/drivers/net/wireguard/peer.c
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Diffstat (limited to 'drivers/net/wireguard/peer.c')
-rw-r--r--drivers/net/wireguard/peer.c27
1 files changed, 20 insertions, 7 deletions
diff --git a/drivers/net/wireguard/peer.c b/drivers/net/wireguard/peer.c
index cd5cb0292cb6..1acd00ab2fbc 100644
--- a/drivers/net/wireguard/peer.c
+++ b/drivers/net/wireguard/peer.c
@@ -15,6 +15,7 @@
#include <linux/rcupdate.h>
#include <linux/list.h>
+static struct kmem_cache *peer_cache;
static atomic64_t peer_counter = ATOMIC64_INIT(0);
struct wg_peer *wg_peer_create(struct wg_device *wg,
@@ -29,10 +30,10 @@ struct wg_peer *wg_peer_create(struct wg_device *wg,
if (wg->num_peers >= MAX_PEERS_PER_DEVICE)
return ERR_PTR(ret);
- peer = kzalloc(sizeof(*peer), GFP_KERNEL);
+ peer = kmem_cache_zalloc(peer_cache, GFP_KERNEL);
if (unlikely(!peer))
return ERR_PTR(ret);
- if (dst_cache_init(&peer->endpoint_cache, GFP_KERNEL))
+ if (unlikely(dst_cache_init(&peer->endpoint_cache, GFP_KERNEL)))
goto err;
peer->device = wg;
@@ -64,7 +65,7 @@ struct wg_peer *wg_peer_create(struct wg_device *wg,
return peer;
err:
- kfree(peer);
+ kmem_cache_free(peer_cache, peer);
return ERR_PTR(ret);
}
@@ -88,7 +89,7 @@ static void peer_make_dead(struct wg_peer *peer)
/* Mark as dead, so that we don't allow jumping contexts after. */
WRITE_ONCE(peer->is_dead, true);
- /* The caller must now synchronize_rcu() for this to take effect. */
+ /* The caller must now synchronize_net() for this to take effect. */
}
static void peer_remove_after_dead(struct wg_peer *peer)
@@ -160,7 +161,7 @@ void wg_peer_remove(struct wg_peer *peer)
lockdep_assert_held(&peer->device->device_update_lock);
peer_make_dead(peer);
- synchronize_rcu();
+ synchronize_net();
peer_remove_after_dead(peer);
}
@@ -178,7 +179,7 @@ void wg_peer_remove_all(struct wg_device *wg)
peer_make_dead(peer);
list_add_tail(&peer->peer_list, &dead_peers);
}
- synchronize_rcu();
+ synchronize_net();
list_for_each_entry_safe(peer, temp, &dead_peers, peer_list)
peer_remove_after_dead(peer);
}
@@ -193,7 +194,8 @@ static void rcu_release(struct rcu_head *rcu)
/* The final zeroing takes care of clearing any remaining handshake key
* material and other potentially sensitive information.
*/
- kfree_sensitive(peer);
+ memzero_explicit(peer, sizeof(*peer));
+ kmem_cache_free(peer_cache, peer);
}
static void kref_release(struct kref *refcount)
@@ -225,3 +227,14 @@ void wg_peer_put(struct wg_peer *peer)
return;
kref_put(&peer->refcount, kref_release);
}
+
+int __init wg_peer_init(void)
+{
+ peer_cache = KMEM_CACHE(wg_peer, 0);
+ return peer_cache ? 0 : -ENOMEM;
+}
+
+void wg_peer_uninit(void)
+{
+ kmem_cache_destroy(peer_cache);
+}