net: Add decrypted field to skb

The decrypted bit is propogated to cloned/copied skbs.
This will be used later by the inline crypto receive side offload
of tls.

Signed-off-by: Boris Pismenny <borisp@mellanox.com>
Signed-off-by: Ilya Lesokhin <ilyal@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 7601838..3ceb8dc 100644 (file)
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -630,6 +630,7 @@ typedef unsigned char *sk_buff_data_t;
  *     @hash: the packet hash
  *     @queue_mapping: Queue mapping for multiqueue devices
  *     @xmit_more: More SKBs are pending for this queue
+ *     @decrypted: Decrypted SKB
  *     @ndisc_nodetype: router type (from link layer)
  *     @ooo_okay: allow the mapping of a socket to a queue to be changed
  *     @l4_hash: indicate hash is a canonical 4-tuple hash over transport
@@ -736,7 +737,11 @@ struct sk_buff {
                                peeked:1,
                                head_frag:1,
                                xmit_more:1,
-                               __unused:1; /* one bit hole */
+#ifdef CONFIG_TLS_DEVICE
+                               decrypted:1;
+#else
+                               __unused:1;
+#endif
 
        /* fields enclosed in headers_start/headers_end are copied
         * using a single memcpy() in __copy_skb_header()

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index c4e24ac..cfd6c6f 100644 (file)
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -805,6 +805,9 @@ static void __copy_skb_header(struct sk_buff *new, const struct sk_buff *old)
         * It is not yet because we do not want to have a 16 bit hole
         */
        new->queue_mapping = old->queue_mapping;
+#ifdef CONFIG_TLS_DEVICE
+       new->decrypted = old->decrypted;
+#endif
 
        memcpy(&new->headers_start, &old->headers_start,
               offsetof(struct sk_buff, headers_end) -
@@ -865,6 +868,9 @@ static struct sk_buff *__skb_clone(struct sk_buff *n, struct sk_buff *skb)
        C(head_frag);
        C(data);
        C(truesize);
+#ifdef CONFIG_TLS_DEVICE
+       C(decrypted);
+#endif
        refcount_set(&n->users, 1);
 
        atomic_inc(&(skb_shinfo(skb)->dataref));