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Diffstat (limited to 'net/tls/tls_device.c')
-rw-r--r--net/tls/tls_device.c36
1 files changed, 23 insertions, 13 deletions
diff --git a/net/tls/tls_device.c b/net/tls/tls_device.c
index ca54a7c7ec81..1f9cf57d9754 100644
--- a/net/tls/tls_device.c
+++ b/net/tls/tls_device.c
@@ -550,10 +550,22 @@ void tls_device_write_space(struct sock *sk, struct tls_context *ctx)
}
}
+static void tls_device_resync_rx(struct tls_context *tls_ctx,
+ struct sock *sk, u32 seq, u64 rcd_sn)
+{
+ struct net_device *netdev;
+
+ if (WARN_ON(test_and_set_bit(TLS_RX_SYNC_RUNNING, &tls_ctx->flags)))
+ return;
+ netdev = READ_ONCE(tls_ctx->netdev);
+ if (netdev)
+ netdev->tlsdev_ops->tls_dev_resync_rx(netdev, sk, seq, rcd_sn);
+ clear_bit_unlock(TLS_RX_SYNC_RUNNING, &tls_ctx->flags);
+}
+
void handle_device_resync(struct sock *sk, u32 seq, u64 rcd_sn)
{
struct tls_context *tls_ctx = tls_get_ctx(sk);
- struct net_device *netdev = tls_ctx->netdev;
struct tls_offload_context_rx *rx_ctx;
u32 is_req_pending;
s64 resync_req;
@@ -568,10 +580,10 @@ void handle_device_resync(struct sock *sk, u32 seq, u64 rcd_sn)
is_req_pending = resync_req;
if (unlikely(is_req_pending) && req_seq == seq &&
- atomic64_try_cmpxchg(&rx_ctx->resync_req, &resync_req, 0))
- netdev->tlsdev_ops->tls_dev_resync_rx(netdev, sk,
- seq + TLS_HEADER_SIZE - 1,
- rcd_sn);
+ atomic64_try_cmpxchg(&rx_ctx->resync_req, &resync_req, 0)) {
+ seq += TLS_HEADER_SIZE - 1;
+ tls_device_resync_rx(tls_ctx, sk, seq, rcd_sn);
+ }
}
static int tls_device_reencrypt(struct sock *sk, struct sk_buff *skb)
@@ -934,12 +946,6 @@ void tls_device_offload_cleanup_rx(struct sock *sk)
if (!netdev)
goto out;
- if (!(netdev->features & NETIF_F_HW_TLS_RX)) {
- pr_err_ratelimited("%s: device is missing NETIF_F_HW_TLS_RX cap\n",
- __func__);
- goto out;
- }
-
netdev->tlsdev_ops->tls_dev_del(netdev, tls_ctx,
TLS_OFFLOAD_CTX_DIR_RX);
@@ -978,7 +984,10 @@ static int tls_device_down(struct net_device *netdev)
if (ctx->rx_conf == TLS_HW)
netdev->tlsdev_ops->tls_dev_del(netdev, ctx,
TLS_OFFLOAD_CTX_DIR_RX);
- ctx->netdev = NULL;
+ WRITE_ONCE(ctx->netdev, NULL);
+ smp_mb__before_atomic(); /* pairs with test_and_set_bit() */
+ while (test_bit(TLS_RX_SYNC_RUNNING, &ctx->flags))
+ usleep_range(10, 200);
dev_put(netdev);
list_del_init(&ctx->list);
@@ -998,7 +1007,8 @@ static int tls_dev_event(struct notifier_block *this, unsigned long event,
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
- if (!(dev->features & (NETIF_F_HW_TLS_RX | NETIF_F_HW_TLS_TX)))
+ if (!dev->tlsdev_ops &&
+ !(dev->features & (NETIF_F_HW_TLS_RX | NETIF_F_HW_TLS_TX)))
return NOTIFY_DONE;
switch (event) {