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Thu, 21 Jan 2021 11:30:03 +0000 From: Oleksandr Mazur To: netdev@vger.kernel.org Cc: jiri@nvidia.com, davem@davemloft.net, linux-kernel@vger.kernel.org, kuba@kernel.org, Oleksandr Mazur Subject: [PATCH iproute2-next] devlink: add support for HARD_DROP trap action Date: Thu, 21 Jan 2021 13:29:54 +0200 Message-Id: <20210121112954.31039-1-oleksandr.mazur@plvision.eu> X-Mailer: git-send-email 2.17.1 X-Originating-IP: [77.222.147.22] X-ClientProxiedBy: AM3PR05CA0144.eurprd05.prod.outlook.com (2603:10a6:207:3::22) To AM0P190MB0738.EURP190.PROD.OUTLOOK.COM (2603:10a6:208:19b::9) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from omazur.x.ow.s (77.222.147.22) by AM3PR05CA0144.eurprd05.prod.outlook.com (2603:10a6:207:3::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3784.12 via Frontend Transport; Thu, 21 Jan 2021 11:30:02 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: b9324061-2535-4f09-5e3f-08d8bdffe51b X-MS-TrafficTypeDiagnostic: AM4P190MB0065: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:8273; 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It's used whenever device is unable to report trapped packet to the devlink subsystem, and thus device could only state how many packets have been dropped, without passing a packet to the devlink subsystem to get track of traffic statistics. Signed-off-by: Oleksandr Mazur --- devlink/devlink.c | 4 ++++ include/uapi/linux/devlink.h | 4 ++++ 2 files changed, 8 insertions(+) diff --git a/devlink/devlink.c b/devlink/devlink.c index a2e06644..77185f7c 100644 --- a/devlink/devlink.c +++ b/devlink/devlink.c @@ -1335,6 +1335,8 @@ static int trap_action_get(const char *actionstr, { if (strcmp(actionstr, "drop") == 0) { *p_action = DEVLINK_TRAP_ACTION_DROP; + } else if (strcmp(actionstr, "hard_drop") == 0) { + *p_action = DEVLINK_TRAP_ACTION_HARD_DROP; } else if (strcmp(actionstr, "trap") == 0) { *p_action = DEVLINK_TRAP_ACTION_TRAP; } else if (strcmp(actionstr, "mirror") == 0) { @@ -7726,6 +7728,8 @@ static const char *trap_action_name(uint8_t action) switch (action) { case DEVLINK_TRAP_ACTION_DROP: return "drop"; + case DEVLINK_TRAP_ACTION_HARD_DROP: + return "hard_drop"; case DEVLINK_TRAP_ACTION_TRAP: return "trap"; case DEVLINK_TRAP_ACTION_MIRROR: diff --git a/include/uapi/linux/devlink.h b/include/uapi/linux/devlink.h index 1414acee..ecee2541 100644 --- a/include/uapi/linux/devlink.h +++ b/include/uapi/linux/devlink.h @@ -261,12 +261,16 @@ enum { * enum devlink_trap_action - Packet trap action. * @DEVLINK_TRAP_ACTION_DROP: Packet is dropped by the device and a copy is not * sent to the CPU. + * @DEVLINK_TRAP_ACTION_HARD_DROP: Packet was dropped by the underlying device, + * and device cannot report packet to devlink + * (or inject it into the kernel RX path). * @DEVLINK_TRAP_ACTION_TRAP: The sole copy of the packet is sent to the CPU. * @DEVLINK_TRAP_ACTION_MIRROR: Packet is forwarded by the device and a copy is * sent to the CPU. */ enum devlink_trap_action { DEVLINK_TRAP_ACTION_DROP, + DEVLINK_TRAP_ACTION_HARD_DROP, DEVLINK_TRAP_ACTION_TRAP, DEVLINK_TRAP_ACTION_MIRROR, };