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authorJeremy Kerr <jk@codeconstruct.com.au>2021-07-29 05:20:44 +0300
committerDavid S. Miller <davem@davemloft.net>2021-07-29 17:06:50 +0300
commit583be982d93479ea3d85091b0fd0b01201ede87d (patch)
treeb4407ff68cdafc6bea2041b6ca0dac5be0a1bfa2 /include/net
parent4b2e69305cbbc7c32ecbd946110b505c4ff6071a (diff)
downloadlinux-583be982d93479ea3d85091b0fd0b01201ede87d.tar.xz
mctp: Add device handling and netlink interface
This change adds the infrastructure for managing MCTP netdevices; we add a pointer to the AF_MCTP-specific data to struct netdevice, and hook up the rtnetlink operations for adding and removing addresses. Includes changes from Matt Johnston <matt@codeconstruct.com.au>. Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
-rw-r--r--include/net/mctp.h14
-rw-r--r--include/net/mctpdevice.h35
2 files changed, 49 insertions, 0 deletions
diff --git a/include/net/mctp.h b/include/net/mctp.h
index 4c01e083be45..61452e03aa85 100644
--- a/include/net/mctp.h
+++ b/include/net/mctp.h
@@ -10,6 +10,7 @@
#define __NET_MCTP_H
#include <linux/bits.h>
+#include <linux/mctp.h>
/* MCTP packet definitions */
struct mctp_hdr {
@@ -32,4 +33,17 @@ struct mctp_hdr {
#define MCTP_HDR_TAG_SHIFT 0
#define MCTP_HDR_TAG_MASK GENMASK(2, 0)
+static inline bool mctp_address_ok(mctp_eid_t eid)
+{
+ return eid >= 8 && eid < 255;
+}
+
+static inline struct mctp_hdr *mctp_hdr(struct sk_buff *skb)
+{
+ return (struct mctp_hdr *)skb_network_header(skb);
+}
+
+void mctp_device_init(void);
+void mctp_device_exit(void);
+
#endif /* __NET_MCTP_H */
diff --git a/include/net/mctpdevice.h b/include/net/mctpdevice.h
new file mode 100644
index 000000000000..71a11012fac7
--- /dev/null
+++ b/include/net/mctpdevice.h
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Management Component Transport Protocol (MCTP) - device
+ * definitions.
+ *
+ * Copyright (c) 2021 Code Construct
+ * Copyright (c) 2021 Google
+ */
+
+#ifndef __NET_MCTPDEVICE_H
+#define __NET_MCTPDEVICE_H
+
+#include <linux/list.h>
+#include <linux/types.h>
+#include <linux/refcount.h>
+
+struct mctp_dev {
+ struct net_device *dev;
+
+ unsigned int net;
+
+ /* Only modified under RTNL. Reads have addrs_lock held */
+ u8 *addrs;
+ size_t num_addrs;
+ spinlock_t addrs_lock;
+
+ struct rcu_head rcu;
+};
+
+#define MCTP_INITIAL_DEFAULT_NET 1
+
+struct mctp_dev *mctp_dev_get_rtnl(const struct net_device *dev);
+struct mctp_dev *__mctp_dev_get(const struct net_device *dev);
+
+#endif /* __NET_MCTPDEVICE_H */