From: Hannes Reinecke <hare@suse.de>
To: Christoph Hellwig <hch@lst.de>
Cc: Sagi Grimberg <sagi@grimberg.me>, Keith Busch <kbusch@kernel.org>,
linux-nvme@lists.infradead.org, Chuck Lever <cel@kernel.org>,
kernel-tls-handshake@lists.linux.dev,
Hannes Reinecke <hare@suse.de>
Subject: [PATCH 17/18] nvmet-tcp: control messages for recvmsg()
Date: Tue, 21 Mar 2023 13:43:24 +0100 [thread overview]
Message-ID: <20230321124325.77385-18-hare@suse.de> (raw)
In-Reply-To: <20230321124325.77385-1-hare@suse.de>
kTLS requires control messages for recvmsg() to relay any out-of-band
TLS messages (eg TLS alerts) to the caller.
Signed-off-by: Hannes Reinecke <hare@suse.de>
---
drivers/nvme/target/tcp.c | 58 +++++++++++++++++++++++++++++++++++++--
1 file changed, 56 insertions(+), 2 deletions(-)
diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c
index 9b69cac84508..a69647fb2c81 100644
--- a/drivers/nvme/target/tcp.c
+++ b/drivers/nvme/target/tcp.c
@@ -12,6 +12,7 @@
#include <linux/nvme-keyring.h>
#include <net/sock.h>
#include <net/tcp.h>
+#include <net/tls.h>
#include <net/handshake.h>
#include <linux/inet.h>
#include <linux/llist.h>
@@ -88,6 +89,7 @@ struct nvmet_tcp_cmd {
u32 pdu_len;
u32 pdu_recv;
int sg_idx;
+ char recv_cbuf[CMSG_LEN(sizeof(char))];
struct msghdr recv_msg;
struct bio_vec *iov;
u32 flags;
@@ -1108,7 +1110,14 @@ static int nvmet_tcp_try_recv_pdu(struct nvmet_tcp_queue *queue)
struct nvme_tcp_hdr *hdr = &queue->pdu.cmd.hdr;
int len;
struct kvec iov;
- struct msghdr msg = { .msg_flags = MSG_DONTWAIT };
+ char cbuf[CMSG_LEN(sizeof(char))] = {};
+ unsigned char ctype;
+ struct cmsghdr *cmsg;
+ struct msghdr msg = {
+ .msg_control = cbuf,
+ .msg_controllen = sizeof(cbuf),
+ .msg_flags = MSG_DONTWAIT
+ };
recv:
iov.iov_base = (void *)&queue->pdu + queue->offset;
@@ -1117,6 +1126,17 @@ static int nvmet_tcp_try_recv_pdu(struct nvmet_tcp_queue *queue)
iov.iov_len, msg.msg_flags);
if (unlikely(len < 0))
return len;
+ cmsg = (struct cmsghdr *)cbuf;
+ if (CMSG_OK(&msg, cmsg) &&
+ cmsg->cmsg_level == SOL_TLS &&
+ cmsg->cmsg_type == TLS_GET_RECORD_TYPE) {
+ ctype = *((unsigned char *)CMSG_DATA(cmsg));
+ if (ctype != TLS_RECORD_TYPE_DATA) {
+ pr_err("queue %d unhandled TLS record %d\n",
+ queue->idx, ctype);
+ return -ENOTCONN;
+ }
+ }
queue->offset += len;
queue->left -= len;
@@ -1172,10 +1192,24 @@ static int nvmet_tcp_try_recv_data(struct nvmet_tcp_queue *queue)
int ret;
while (msg_data_left(&cmd->recv_msg)) {
+ struct cmsghdr *cmsg;
+ unsigned char ctype;
+
ret = sock_recvmsg(cmd->queue->sock, &cmd->recv_msg,
cmd->recv_msg.msg_flags);
if (ret <= 0)
return ret;
+ cmsg = (struct cmsghdr *)cmd->recv_cbuf;
+ if (CMSG_OK(&cmd->recv_msg, cmsg) &&
+ cmsg->cmsg_level == SOL_TLS &&
+ cmsg->cmsg_type == TLS_GET_RECORD_TYPE) {
+ ctype = *((unsigned char *)CMSG_DATA(cmsg));
+ if (ctype != TLS_RECORD_TYPE_DATA) {
+ pr_err("queue %d unhandled TLS record %d\n",
+ queue->idx, ctype);
+ return -ENOTCONN;
+ }
+ }
cmd->pdu_recv += ret;
cmd->rbytes_done += ret;
@@ -1197,7 +1231,14 @@ static int nvmet_tcp_try_recv_ddgst(struct nvmet_tcp_queue *queue)
{
struct nvmet_tcp_cmd *cmd = queue->cmd;
int ret;
- struct msghdr msg = { .msg_flags = MSG_DONTWAIT };
+ char cbuf[CMSG_LEN(sizeof(char))] = {};
+ unsigned char ctype;
+ struct cmsghdr *cmsg;
+ struct msghdr msg = {
+ .msg_control = cbuf,
+ .msg_controllen = sizeof(cbuf),
+ .msg_flags = MSG_DONTWAIT
+ };
struct kvec iov = {
.iov_base = (void *)&cmd->recv_ddgst + queue->offset,
.iov_len = queue->left
@@ -1207,6 +1248,17 @@ static int nvmet_tcp_try_recv_ddgst(struct nvmet_tcp_queue *queue)
iov.iov_len, msg.msg_flags);
if (unlikely(ret < 0))
return ret;
+ cmsg = (struct cmsghdr *)cbuf;
+ if (CMSG_OK(&msg, cmsg) &&
+ cmsg->cmsg_level == SOL_TLS &&
+ cmsg->cmsg_type == TLS_GET_RECORD_TYPE) {
+ ctype = *((unsigned char *)CMSG_DATA(cmsg));
+ if (ctype != TLS_RECORD_TYPE_DATA) {
+ pr_err("queue %d unhandled TLS record %d\n",
+ queue->idx, ctype);
+ return -ENOTCONN;
+ }
+ }
queue->offset += ret;
queue->left -= ret;
@@ -1376,6 +1428,8 @@ static int nvmet_tcp_alloc_cmd(struct nvmet_tcp_queue *queue,
if (!c->r2t_pdu)
goto out_free_data;
+ c->recv_msg.msg_control = c->recv_cbuf;
+ c->recv_msg.msg_controllen = sizeof(c->recv_cbuf);
c->recv_msg.msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL;
list_add_tail(&c->entry, &queue->free_list);
--
2.35.3
next prev parent reply other threads:[~2023-03-21 12:44 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-21 12:43 [RFC PATCH 00/18] nvme: In-kernel TLS support for TCP Hannes Reinecke
2023-03-21 12:43 ` [PATCH 01/18] nvme-keyring: register '.nvme' keyring Hannes Reinecke
2023-03-21 13:50 ` Sagi Grimberg
2023-03-21 14:11 ` Hannes Reinecke
2023-03-21 12:43 ` [PATCH 02/18] nvme-keyring: define a 'psk' keytype Hannes Reinecke
2023-03-22 8:29 ` Sagi Grimberg
2023-03-22 8:38 ` Hannes Reinecke
2023-03-22 8:49 ` Sagi Grimberg
2023-03-21 12:43 ` [PATCH 03/18] nvme: add TCP TSAS definitions Hannes Reinecke
2023-03-21 13:46 ` Sagi Grimberg
2023-03-21 12:43 ` [PATCH 04/18] nvme-tcp: add definitions for TLS cipher suites Hannes Reinecke
2023-03-22 8:18 ` Sagi Grimberg
2023-03-21 12:43 ` [PATCH 05/18] nvme-tcp: implement recvmsg rx flow for TLS Hannes Reinecke
2023-03-21 13:39 ` Sagi Grimberg
2023-03-21 13:59 ` Hannes Reinecke
2023-03-22 8:01 ` Sagi Grimberg
2023-03-21 12:43 ` [PATCH 06/18] nvme-tcp: call 'queue->data_ready()' in nvme_tcp_data_ready() Hannes Reinecke
2023-03-21 13:44 ` Sagi Grimberg
2023-03-21 14:09 ` Hannes Reinecke
2023-03-22 0:18 ` Chris Leech
2023-03-22 6:59 ` Hannes Reinecke
2023-03-22 8:12 ` Sagi Grimberg
2023-03-22 8:08 ` Sagi Grimberg
2023-03-22 8:26 ` Hannes Reinecke
2023-03-22 10:13 ` Sagi Grimberg
2023-03-21 12:43 ` [PATCH 07/18] nvme/tcp: allocate socket file Hannes Reinecke
2023-03-21 13:52 ` Sagi Grimberg
2023-03-21 12:43 ` [PATCH 08/18] nvme-tcp: enable TLS handshake upcall Hannes Reinecke
2023-03-22 8:45 ` Sagi Grimberg
2023-03-22 9:12 ` Hannes Reinecke
2023-03-22 10:56 ` Sagi Grimberg
2023-03-22 12:54 ` Hannes Reinecke
2023-03-22 13:16 ` Sagi Grimberg
2023-03-21 12:43 ` [PATCH 09/18] nvme-tcp: add connect option 'tls' Hannes Reinecke
2023-03-22 9:24 ` Sagi Grimberg
2023-03-22 9:59 ` Hannes Reinecke
2023-03-22 10:09 ` Sagi Grimberg
2023-03-21 12:43 ` [PATCH 10/18] nvme-tcp: fixup send workflow for kTLS Hannes Reinecke
2023-03-22 9:31 ` Sagi Grimberg
2023-03-22 10:08 ` Hannes Reinecke
2023-03-22 11:18 ` Sagi Grimberg
2023-03-21 12:43 ` [PATCH 11/18] nvme-tcp: control message handling for recvmsg() Hannes Reinecke
2023-03-22 11:33 ` Sagi Grimberg
2023-03-22 11:48 ` Hannes Reinecke
2023-03-22 11:50 ` Sagi Grimberg
2023-03-22 12:17 ` Hannes Reinecke
2023-03-22 12:29 ` Sagi Grimberg
2023-03-21 12:43 ` [PATCH 12/18] nvmet: make TCP sectype settable via configfs Hannes Reinecke
2023-03-22 11:38 ` Sagi Grimberg
2023-03-21 12:43 ` [PATCH 13/18] nvmet-tcp: allocate socket file Hannes Reinecke
2023-03-22 11:46 ` Sagi Grimberg
2023-03-22 12:07 ` Hannes Reinecke
2023-03-21 12:43 ` [PATCH 14/18] security/keys: export key_lookup() Hannes Reinecke
2023-03-21 12:43 ` [PATCH 15/18] nvmet-tcp: enable TLS handshake upcall Hannes Reinecke
2023-03-22 12:13 ` Sagi Grimberg
2023-03-22 12:34 ` Hannes Reinecke
2023-03-22 12:51 ` Sagi Grimberg
2023-03-22 13:47 ` Hannes Reinecke
2023-03-22 15:42 ` Sagi Grimberg
2023-03-22 16:43 ` Hannes Reinecke
2023-03-22 16:49 ` Chuck Lever III
2023-03-23 7:21 ` Sagi Grimberg
2023-03-24 11:29 ` Hannes Reinecke
2023-03-26 7:18 ` Sagi Grimberg
2023-03-27 6:20 ` Hannes Reinecke
2023-03-28 8:44 ` Sagi Grimberg
2023-03-28 9:20 ` Hannes Reinecke
2023-03-28 9:43 ` Sagi Grimberg
2023-03-28 10:04 ` Hannes Reinecke
2023-03-28 13:22 ` Chuck Lever III
2023-03-28 15:29 ` Sagi Grimberg
2023-03-28 15:56 ` Chuck Lever III
2023-03-29 6:33 ` Sagi Grimberg
2023-03-23 7:44 ` Sagi Grimberg
2023-03-21 12:43 ` [PATCH 16/18] nvmet-tcp: rework sendpage for kTLS Hannes Reinecke
2023-03-22 12:16 ` Sagi Grimberg
2023-03-21 12:43 ` Hannes Reinecke [this message]
2023-03-21 12:43 ` [PATCH 18/18] nvmet-tcp: peek icreq before starting TLS Hannes Reinecke
2023-03-22 12:24 ` Sagi Grimberg
2023-03-22 12:38 ` Hannes Reinecke
2023-03-21 13:12 ` [RFC PATCH 00/18] nvme: In-kernel TLS support for TCP Sagi Grimberg
2023-03-21 13:30 ` Hannes Reinecke
2023-03-22 8:16 ` Sagi Grimberg
2023-03-22 8:28 ` Hannes Reinecke
2023-03-22 12:53 ` Sagi Grimberg
2023-03-22 15:10 ` Hannes Reinecke
2023-03-22 15:43 ` Sagi Grimberg
2023-03-29 13:59 [PATCHv2 " Hannes Reinecke
2023-03-29 13:59 ` [PATCH 17/18] nvmet-tcp: control messages for recvmsg() Hannes Reinecke
2023-04-03 12:59 ` Sagi Grimberg
2023-04-17 13:02 [PATCHv3 00/18] nvme: In-kernel TLS support for TCP Hannes Reinecke
2023-04-17 13:03 ` [PATCH 17/18] nvmet-tcp: control messages for recvmsg() Hannes Reinecke
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