[PATCH 07/18] nvme/tcp: allocate socket file

[Hannes Reinecke <hare@suse.de>]

When using the TLS upcall we need to allocate a socket file such
that the userspace daemon is able to use the socket.

Signed-off-by: Hannes Reinecke <hare@suse.de>
---
 drivers/nvme/host/tcp.c | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index 0512eb289dcf..0438d42f4179 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -115,6 +115,7 @@ enum nvme_tcp_recv_state {
 struct nvme_tcp_ctrl;
 struct nvme_tcp_queue {
 	struct socket		*sock;
+	struct file		*sock_file;
 	struct work_struct	io_work;
 	int			io_cpu;
 
@@ -1330,7 +1331,12 @@ static void nvme_tcp_free_queue(struct nvme_ctrl *nctrl, int qid)
 	}
 
 	noreclaim_flag = memalloc_noreclaim_save();
-	sock_release(queue->sock);
+	if (queue->sock_file) {
+		fput(queue->sock_file);
+		queue->sock_file = NULL;
+		/* ->sock will be released by fput() */
+	} else
+		sock_release(queue->sock);
 	memalloc_noreclaim_restore(noreclaim_flag);
 
 	kfree(queue->pdu);
@@ -1526,6 +1532,12 @@ static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl, int qid)
 		goto err_destroy_mutex;
 	}
 
+	queue->sock_file = sock_alloc_file(queue->sock, O_CLOEXEC, NULL);
+	if (IS_ERR(queue->sock_file)) {
+		ret = PTR_ERR(queue->sock_file);
+		queue->sock_file = NULL;
+		goto err_sock;
+	}
 	nvme_tcp_reclassify_socket(queue->sock);
 
 	/* Single syn retry */
@@ -1647,7 +1659,12 @@ static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl, int qid)
 	if (queue->hdr_digest || queue->data_digest)
 		nvme_tcp_free_crypto(queue);
 err_sock:
-	sock_release(queue->sock);
+	if (queue->sock_file) {
+		fput(queue->sock_file);
+		queue->sock_file = NULL;
+		/* ->sock will be released by fput() */
+	} else
+		sock_release(queue->sock);
 	queue->sock = NULL;
 err_destroy_mutex:
 	mutex_destroy(&queue->send_mutex);
-- 
2.35.3