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05 April 2024, 19:05:47 UTC
Revision f9cd6a4418bac6a046ee78382423b1ae7565fb24 authored by Jason Xing on 08 February 2023, 02:43:32 UTC, committed by Tony Nguyen on 14 February 2023, 18:07:13 UTC 
ixgbe: allow to increase MTU to 3K with XDP enabled
 
Recently I encountered one case where I cannot increase the MTU size
directly from 1500 to a much bigger value with XDP enabled if the
server is equipped with IXGBE card, which happened on thousands of
servers in production environment. After applying the current patch,
we can set the maximum MTU size to 3K.

This patch follows the behavior of changing MTU as i40e/ice does.

References:
[1] commit 23b44513c3e6 ("ice: allow 3k MTU for XDP")
[2] commit 0c8493d90b6b ("i40e: add XDP support for pass and drop actions")

Fixes: fabf1bce103a ("ixgbe: Prevent unsupported configurations with XDP")
Signed-off-by: Jason Xing <kernelxing@tencent.com>
Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
Tested-by: Chandan Kumar Rout <chandanx.rout@intel.com> (A Contingent Worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
1 parent 05d7623
Raw File
Tip revision: f9cd6a4418bac6a046ee78382423b1ae7565fb24 authored by Jason Xing on 08 February 2023, 02:43:32 UTC
ixgbe: allow to increase MTU to 3K with XDP enabled
Tip revision: f9cd6a4
uring_cmd.h 
// SPDX-License-Identifier: GPL-2.0

int io_uring_cmd(struct io_kiocb *req, unsigned int issue_flags);
int io_uring_cmd_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
int io_uring_cmd_prep_async(struct io_kiocb *req);

/*
 * The URING_CMD payload starts at 'cmd' in the first sqe, and continues into
 * the following sqe if SQE128 is used.
 */
#define uring_cmd_pdu_size(is_sqe128)				\
	((1 + !!(is_sqe128)) * sizeof(struct io_uring_sqe) -	\
		offsetof(struct io_uring_sqe, cmd))
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