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2024-05-10 10ebd8556b7990499c896a550e3d416b444211e6

 kernel/include/uapi/linux/can.h
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@@ -1,4 +1,4 @@
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-/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
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+/* SPDX-License-Identifier: ((GPL-2.0-only WITH Linux-syscall-note) OR BSD-3-Clause) */
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 /*
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  * linux/can.h
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  *
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@@ -157,7 +157,8 @@
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 #define CAN_TP20	4 /* VAG Transport Protocol v2.0 */
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 #define CAN_MCNET	5 /* Bosch MCNet */
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 #define CAN_ISOTP	6 /* ISO 15765-2 Transport Protocol */
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-#define CAN_NPROTO	7
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+#define CAN_J1939	7 /* SAE J1939 */
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+#define CAN_NPROTO	8
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 #define SOL_CAN_BASE 100
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@@ -174,6 +175,23 @@
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 		/* transport protocol class address information (e.g. ISOTP) */
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 		struct { canid_t rx_id, tx_id; } tp;
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+		/* J1939 address information */
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+		struct {
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+			/* 8 byte name when using dynamic addressing */
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+			__u64 name;
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+
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+			/* pgn:
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+			 * 8 bit: PS in PDU2 case, else 0
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+			 * 8 bit: PF
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+			 * 1 bit: DP
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+			 * 1 bit: reserved
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+			 */
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+			__u32 pgn;
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+
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+			/* 1 byte address */
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+			__u8 addr;
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+		} j1939;
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+
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 		/* reserved for future CAN protocols address information */
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 	} can_addr;
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 };