[PATCH net-next v10 4/7] tls: Factor tls_strp_msg_consume() from tls_strp_msg_done()

[Chuck Lever <cel@kernel.org>]

From: Chuck Lever <chuck.lever@oracle.com>

tls_strp_msg_done() conflates releasing the current record with
checking for the next one via tls_strp_check_rcv(). A subsequent
patch needs to release a record without immediately triggering
that check, so the release step is separated into
tls_strp_msg_consume(). tls_strp_msg_done() is preserved as a
wrapper for existing callers.

Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 net/tls/tls.h      |  1 +
 net/tls/tls_strp.c | 11 ++++++++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/net/tls/tls.h b/net/tls/tls.h
index 12f44cb649c9..cb0091e03f41 100644
--- a/net/tls/tls.h
+++ b/net/tls/tls.h
@@ -194,6 +194,7 @@ int tls_strp_init(struct tls_strparser *strp, struct sock *sk);
 void tls_strp_data_ready(struct tls_strparser *strp);
 
 void tls_strp_check_rcv(struct tls_strparser *strp);
+void tls_strp_msg_consume(struct tls_strparser *strp);
 void tls_strp_msg_done(struct tls_strparser *strp);
 
 int tls_rx_msg_size(struct tls_strparser *strp, struct sk_buff *skb);
diff --git a/net/tls/tls_strp.c b/net/tls/tls_strp.c
index c72e88317627..e7aaee6efe6e 100644
--- a/net/tls/tls_strp.c
+++ b/net/tls/tls_strp.c
@@ -581,7 +581,12 @@ static void tls_strp_work(struct work_struct *w)
 	release_sock(strp->sk);
 }
 
-void tls_strp_msg_done(struct tls_strparser *strp)
+/* Release the current record without triggering a check for the
+ * next record. Callers must invoke tls_strp_check_rcv() before
+ * releasing the socket lock, or queued data will stall until the
+ * next tls_strp_data_ready() event.
+ */
+void tls_strp_msg_consume(struct tls_strparser *strp)
 {
 	WARN_ON(!strp->stm.full_len);
 
@@ -592,7 +597,11 @@ void tls_strp_msg_done(struct tls_strparser *strp)
 
 	WRITE_ONCE(strp->msg_ready, 0);
 	memset(&strp->stm, 0, sizeof(strp->stm));
+}
 
+void tls_strp_msg_done(struct tls_strparser *strp)
+{
+	tls_strp_msg_consume(strp);
 	tls_strp_check_rcv(strp);
 }
 

-- 
2.54.0