[PATCH net-next 2/9] psp: move code from psp_sock_assoc_set_tx() into helper functions

[Daniel Zahka <daniel.zahka@gmail.com>]

This commit is a pure refactor. Its purpose is to lift code that needs
to be called from both initial tx establishment and tx rekeying into
dedicated functions.

Signed-off-by: Daniel Zahka <daniel.zahka@gmail.com>
---
 net/psp/psp_sock.c | 94 +++++++++++++++++++++++++++++++++---------------------
 1 file changed, 58 insertions(+), 36 deletions(-)

diff --git a/net/psp/psp_sock.c b/net/psp/psp_sock.c
index 3a8abd023f99..9b0ecce8350f 100644
--- a/net/psp/psp_sock.c
+++ b/net/psp/psp_sock.c
@@ -187,12 +187,67 @@ static int psp_sock_recv_queue_check(struct sock *sk, struct psp_assoc *pas)
 	return 0;
 }
 
+static int
+psp_pas_set_tx_key(struct psp_dev *psd, struct psp_assoc *pas,
+		   struct psp_key_parsed *key, struct netlink_ext_ack *extack)
+{
+	struct psp_assoc *dummy;
+	int rc;
+
+	/* Pass a fake association to drivers to make sure they don't
+	 * try to store pointers to it. For re-keying we'll need to
+	 * re-allocate the assoc structures.
+	 */
+	dummy = psp_assoc_dummy(pas);
+	if (!dummy)
+		return -ENOMEM;
+
+	memcpy(&dummy->tx, key, sizeof(*key));
+	rc = psp_dev_tx_key_add(psd, dummy, extack);
+	if (rc)
+		goto exit_free_dummy;
+
+	memcpy(pas->drv_data, dummy->drv_data, psd->caps->assoc_drv_spc);
+	memcpy(&pas->tx, key, sizeof(*key));
+
+exit_free_dummy:
+	kfree(dummy);
+	return rc;
+}
+
+static int
+psp_sock_set_tx_key(struct sock *sk, struct psp_dev *psd, struct psp_assoc *pas,
+		    struct psp_key_parsed *key, struct netlink_ext_ack *extack)
+{
+	struct inet_connection_sock *icsk;
+	int err;
+
+	err = psp_sock_recv_queue_check(sk, pas);
+	if (err) {
+		NL_SET_ERR_MSG(extack, "Socket has incompatible segments already in the recv queue");
+		return err;
+	}
+
+	err = psp_pas_set_tx_key(psd, pas, key, extack);
+	if (err)
+		return err;
+
+	WRITE_ONCE(sk->sk_validate_xmit_skb, psp_validate_xmit);
+	tcp_write_collapse_fence(sk);
+	pas->upgrade_seq = tcp_sk(sk)->rcv_nxt;
+
+	icsk = inet_csk(sk);
+	icsk->icsk_ext_hdr_len += psp_sk_overhead(sk);
+	icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
+
+	return err;
+}
+
 int psp_sock_assoc_set_tx(struct sock *sk, struct psp_dev *psd,
 			  u32 version, struct psp_key_parsed *key,
 			  struct netlink_ext_ack *extack)
 {
-	struct inet_connection_sock *icsk;
-	struct psp_assoc *pas, *dummy;
+	struct psp_assoc *pas;
 	int err;
 
 	lock_sock(sk);
@@ -220,40 +275,7 @@ int psp_sock_assoc_set_tx(struct sock *sk, struct psp_dev *psd,
 		goto exit_unlock;
 	}
 
-	err = psp_sock_recv_queue_check(sk, pas);
-	if (err) {
-		NL_SET_ERR_MSG(extack, "Socket has incompatible segments already in the recv queue");
-		goto exit_unlock;
-	}
-
-	/* Pass a fake association to drivers to make sure they don't
-	 * try to store pointers to it. For re-keying we'll need to
-	 * re-allocate the assoc structures.
-	 */
-	dummy = psp_assoc_dummy(pas);
-	if (!dummy) {
-		err = -ENOMEM;
-		goto exit_unlock;
-	}
-
-	memcpy(&dummy->tx, key, sizeof(*key));
-	err = psp_dev_tx_key_add(psd, dummy, extack);
-	if (err)
-		goto exit_free_dummy;
-
-	memcpy(pas->drv_data, dummy->drv_data, psd->caps->assoc_drv_spc);
-	memcpy(&pas->tx, key, sizeof(*key));
-
-	WRITE_ONCE(sk->sk_validate_xmit_skb, psp_validate_xmit);
-	tcp_write_collapse_fence(sk);
-	pas->upgrade_seq = tcp_sk(sk)->rcv_nxt;
-
-	icsk = inet_csk(sk);
-	icsk->icsk_ext_hdr_len += psp_sk_overhead(sk);
-	icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
-
-exit_free_dummy:
-	kfree(dummy);
+	err = psp_sock_set_tx_key(sk, psd, pas, key, extack);
 exit_unlock:
 	release_sock(sk);
 	return err;

-- 
2.47.3