[PATCH 09/18] nvme-tcp: control message handling for recvmsg()
From: Hannes Reinecke <hare@suse.de>
Date: 2023-08-24 14:39:52
Also in:
linux-nvme
Subsystem:
nvm express driver, the rest · Maintainers:
Keith Busch, Jens Axboe, Christoph Hellwig, Sagi Grimberg, Linus Torvalds
kTLS is sending TLS ALERT messages as control messages for recvmsg(). As we can't do anything sensible with it just abort the connection and let the userspace agent to a re-negotiation. Signed-off-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> --- drivers/nvme/host/tcp.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-)
diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index fca18064f1fb..e8e408dbb6ad 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c@@ -14,6 +14,7 @@ #include <net/sock.h> #include <net/tcp.h> #include <net/tls.h> +#include <net/tls_prot.h> #include <net/handshake.h> #include <linux/blk-mq.h> #include <crypto/hash.h>
@@ -1369,6 +1370,8 @@ static int nvme_tcp_init_connection(struct nvme_tcp_queue *queue) { struct nvme_tcp_icreq_pdu *icreq; struct nvme_tcp_icresp_pdu *icresp; + char cbuf[CMSG_LEN(sizeof(char))] = {}; + u8 ctype; struct msghdr msg = {}; struct kvec iov; bool ctrl_hdgst, ctrl_ddgst;
@@ -1406,11 +1409,23 @@ static int nvme_tcp_init_connection(struct nvme_tcp_queue *queue) memset(&msg, 0, sizeof(msg)); iov.iov_base = icresp; iov.iov_len = sizeof(*icresp); + if (queue->ctrl->ctrl.opts->tls) { + msg.msg_control = cbuf; + msg.msg_controllen = sizeof(cbuf); + } ret = kernel_recvmsg(queue->sock, &msg, &iov, 1, iov.iov_len, msg.msg_flags); if (ret < 0) goto free_icresp; - + if (queue->ctrl->ctrl.opts->tls) { + ctype = tls_get_record_type(queue->sock->sk, + (struct cmsghdr *)cbuf); + if (ctype != TLS_RECORD_TYPE_DATA) { + pr_err("queue %d: unhandled TLS record %d\n", + nvme_tcp_queue_id(queue), ctype); + return -ENOTCONN; + } + } ret = -EINVAL; if (icresp->hdr.type != nvme_tcp_icresp) { pr_err("queue %d: bad type returned %d\n",
--
2.35.3