netdev - [PATCH 15/18] nvmet: Set 'TREQ' to 'required' when TLS is enabled

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Message-Id: <20230824143925.9098-16-hare@suse.de>
Date: Thu, 24 Aug 2023 16:39:22 +0200
From: Hannes Reinecke <hare@...e.de>
To: Christoph Hellwig <hch@....de>
Cc: Sagi Grimberg <sagi@...mberg.me>,
	Keith Busch <kbusch@...nel.org>,
	linux-nvme@...ts.infradead.org,
	Jakub Kicinski <kuba@...nel.org>,
	Eric Dumazet <edumazet@...gle.com>,
	Paolo Abeni <pabeni@...hat.com>,
	netdev@...r.kernel.org,
	Hannes Reinecke <hare@...e.de>
Subject: [PATCH 15/18] nvmet: Set 'TREQ' to 'required' when TLS is enabled

The current implementation does not support secure concatenation,
so 'TREQ' is always set to 'required' when TLS is enabled.

Signed-off-by: Hannes Reinecke <hare@...e.de>
Reviewed-by: Sagi Grimberg <sagi@...mberg.me>
---
 drivers/nvme/target/configfs.c | 15 +++++++++++++--
 drivers/nvme/target/nvmet.h    |  5 +++++
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/drivers/nvme/target/configfs.c b/drivers/nvme/target/configfs.c
index 27a0f9c768e8..483569c3f622 100644
--- a/drivers/nvme/target/configfs.c
+++ b/drivers/nvme/target/configfs.c
@@ -166,8 +166,7 @@ static inline u8 nvmet_port_disc_addr_treq_mask(struct nvmet_port *port)
 
 static ssize_t nvmet_addr_treq_show(struct config_item *item, char *page)
 {
-	u8 treq = to_nvmet_port(item)->disc_addr.treq &
-		NVME_TREQ_SECURE_CHANNEL_MASK;
+	u8 treq = nvmet_port_disc_addr_treq_secure_channel(to_nvmet_port(item));
 	int i;
 
 	for (i = 0; i < ARRAY_SIZE(nvmet_addr_treq); i++) {
@@ -376,6 +375,7 @@ static ssize_t nvmet_addr_tsas_store(struct config_item *item,
 		const char *page, size_t count)
 {
 	struct nvmet_port *port = to_nvmet_port(item);
+	u8 treq = nvmet_port_disc_addr_treq_mask(port);
 	u8 sectype;
 	int i;
 
@@ -397,6 +397,17 @@ static ssize_t nvmet_addr_tsas_store(struct config_item *item,
 
 found:
 	nvmet_port_init_tsas_tcp(port, sectype);
+	/*
+	 * The TLS implementation currently does not support
+	 * secure concatenation, so TREQ is always set to 'required'
+	 * if TLS is enabled.
+	 */
+	if (sectype == NVMF_TCP_SECTYPE_TLS13) {
+		treq |= NVMF_TREQ_REQUIRED;
+	} else {
+		treq |= NVMF_TREQ_NOT_SPECIFIED;
+	}
+	port->disc_addr.treq = treq;
 	return count;
 }
 
diff --git a/drivers/nvme/target/nvmet.h b/drivers/nvme/target/nvmet.h
index 8cfd60f3b564..87da62e4b743 100644
--- a/drivers/nvme/target/nvmet.h
+++ b/drivers/nvme/target/nvmet.h
@@ -178,6 +178,11 @@ static inline struct nvmet_port *ana_groups_to_port(
 			ana_groups_group);
 }
 
+static inline u8 nvmet_port_disc_addr_treq_secure_channel(struct nvmet_port *port)
+{
+	return (port->disc_addr.treq & NVME_TREQ_SECURE_CHANNEL_MASK);
+}
+
 struct nvmet_ctrl {
 	struct nvmet_subsys	*subsys;
 	struct nvmet_sq		**sqs;
-- 
2.35.3