[RFC patch 1/4] net/tls: connect routine for Inline TLS client

[Atul Gupta]

Define tls_hw_connect to setup Inline TLS client before
TLS handshake and key program

Signed-off-by: Atul Gupta <atul.gu...@chelsio.com>
---
 include/net/tls.h  |  5 +++++
 net/tls/tls_main.c | 23 +++++++++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/include/net/tls.h b/include/net/tls.h
index 90bf52d..f467cc1 100644
--- a/include/net/tls.h
+++ b/include/net/tls.h
@@ -77,6 +77,8 @@
  * void (*unhash)(struct tls_device *device, struct sock *sk);
  *     This function cleans listen state set by Inline TLS driver
  *
+ * int  (*connect)(struct tls_device *device, struct sock *sk,
+ *                 struct sockaddr *uaddr, int addr_len);
  * void (*release)(struct kref *kref);
  *     Release the registered device and allocated resources
  * @kref: Number of reference to tls_device
@@ -87,6 +89,8 @@ struct tls_device {
        int  (*feature)(struct tls_device *device);
        int  (*hash)(struct tls_device *device, struct sock *sk);
        void (*unhash)(struct tls_device *device, struct sock *sk);
+       int  (*connect)(struct tls_device *device, struct sock *sk,
+                       struct sockaddr *uaddr, int addr_len);
        void (*release)(struct kref *kref);
        struct kref kref;
 };
@@ -245,6 +249,7 @@ struct tls_context {
                           int __user *optlen);
        int  (*hash)(struct sock *sk);
        void (*unhash)(struct sock *sk);
+       int  (*connect)(struct sock *sk, struct sockaddr *uaddr, int addr_len);
 };
 
 struct tls_offload_context_rx {
diff --git a/net/tls/tls_main.c b/net/tls/tls_main.c
index d36d095..aec7b2a 100644
--- a/net/tls/tls_main.c
+++ b/net/tls/tls_main.c
@@ -592,6 +592,28 @@ static void tls_hw_sk_destruct(struct sock *sk)
        icsk->icsk_ulp_data = NULL;
 }
 
+static int tls_hw_connect(struct sock *sk, struct sockaddr *uaddr,
+                         int addr_len)
+{
+       struct tls_device *dev;
+       int err;
+
+       spin_lock_bh(&device_spinlock);
+       list_for_each_entry(dev, &device_list, dev_list) {
+               if (dev->connect) {
+                       kref_get(&dev->kref);
+                       spin_unlock_bh(&device_spinlock);
+                       err = dev->connect(dev, sk, uaddr, addr_len);
+                       kref_put(&dev->kref, dev->release);
+                       spin_lock_bh(&device_spinlock);
+                       if (!err)
+                               break;
+               }
+       }
+       spin_unlock_bh(&device_spinlock);
+       return err;
+}
+
 static int tls_hw_prot(struct sock *sk)
 {
        struct tls_context *ctx;
@@ -709,6 +731,7 @@ static void build_protos(struct proto 
prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG],
        prot[TLS_HW_RECORD][TLS_HW_RECORD] = *base;
        prot[TLS_HW_RECORD][TLS_HW_RECORD].hash         = tls_hw_hash;
        prot[TLS_HW_RECORD][TLS_HW_RECORD].unhash       = tls_hw_unhash;
+       prot[TLS_HW_RECORD][TLS_HW_RECORD].connect      = tls_hw_connect;
        prot[TLS_HW_RECORD][TLS_HW_RECORD].close        = tls_sk_proto_close;
 }
 
-- 
1.8.3.1