Re: [PATCH net-next v7 3/8] hsr: Add a magic header for sending PTP packets

[Jakub Kicinski <kuba@kernel.org>]

On Mon, 28 Sep 2026 14:39:37 +0200 Sebastian Andrzej Siewior wrote:
> Sending PTP packets (ETH_P_1588) via the HSR stack is pointless in its
> current shape because the requested PTP timestamp is not routed to the
> sender. It also needs to be distinguished on which port the message
> should be sent and whether or not a HSR header should be attached.
> 
> To pass this information, a custom header (struct hsr_inline_header) is
> introduced. This header is expected and mandatory if the ether type is
> ETH_P_1588. To avoid any wrong usage, there is a magic field to ensure
> it really is the header.
> 
> The inline header is just prepended containing the port and header
> parameter. After the header, a regular packet follows. It is ensured that
> the inline header and the following ethernet or HSR header is linear
> and can be accessed.
> 
> The two retrieved parameters are passed to hsr_forward_skb() and will be
> used later.
> 
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

breaks build (admittedly in a weird way, some header check thing?):

In file included from <built-in>:1:
./usr/include/linux/hsr_ptp.h:10:2: error: unknown type name 'uint8_t'
   10 |         uint8_t tx_port;
      |         ^
./usr/include/linux/hsr_ptp.h:11:2: error: unknown type name 'uint8_t'
   11 |         uint8_t hsr_hdr;
      |         ^
./usr/include/linux/hsr_ptp.h:12:2: error: unknown type name 'uint8_t'
   12 |         uint8_t __pad0[4];
      |         ^
./usr/include/linux/hsr_ptp.h:13:2: error: unknown type name '__be32'
   13 |         __be32 magic;
      |         ^
./usr/include/linux/hsr_ptp.h:14:2: error: unknown type name 'uint8_t'
   14 |         uint8_t __pad1[2];
      |         ^
./usr/include/linux/hsr_ptp.h:15:2: error: unknown type name '__be16'
   15 |         __be16 eth_type;
      |         ^
-- 
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