57986617a7
When sending dropped packets to user space it is not always necessary to copy the entire packet as usually only the headers are of interest. Allow user to specify the truncation length and add the original length of the packet as additional metadata to the netlink message. By default no truncation is performed. Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
104 lines
2.1 KiB
C
104 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef __NET_DROPMON_H
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#define __NET_DROPMON_H
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#include <linux/types.h>
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#include <linux/netlink.h>
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struct net_dm_drop_point {
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__u8 pc[8];
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__u32 count;
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};
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#define is_drop_point_hw(x) do {\
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int ____i, ____j;\
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for (____i = 0; ____i < 8; i ____i++)\
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____j |= x[____i];\
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____j;\
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} while (0)
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#define NET_DM_CFG_VERSION 0
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#define NET_DM_CFG_ALERT_COUNT 1
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#define NET_DM_CFG_ALERT_DELAY 2
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#define NET_DM_CFG_MAX 3
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struct net_dm_config_entry {
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__u32 type;
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__u64 data __attribute__((aligned(8)));
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};
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struct net_dm_config_msg {
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__u32 entries;
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struct net_dm_config_entry options[0];
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};
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struct net_dm_alert_msg {
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__u32 entries;
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struct net_dm_drop_point points[0];
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};
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struct net_dm_user_msg {
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union {
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struct net_dm_config_msg user;
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struct net_dm_alert_msg alert;
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} u;
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};
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/* These are the netlink message types for this protocol */
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enum {
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NET_DM_CMD_UNSPEC = 0,
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NET_DM_CMD_ALERT,
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NET_DM_CMD_CONFIG,
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NET_DM_CMD_START,
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NET_DM_CMD_STOP,
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NET_DM_CMD_PACKET_ALERT,
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_NET_DM_CMD_MAX,
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};
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#define NET_DM_CMD_MAX (_NET_DM_CMD_MAX - 1)
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/*
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* Our group identifiers
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*/
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#define NET_DM_GRP_ALERT 1
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enum net_dm_attr {
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NET_DM_ATTR_UNSPEC,
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NET_DM_ATTR_ALERT_MODE, /* u8 */
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NET_DM_ATTR_PC, /* u64 */
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NET_DM_ATTR_SYMBOL, /* string */
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NET_DM_ATTR_IN_PORT, /* nested */
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NET_DM_ATTR_TIMESTAMP, /* struct timespec */
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NET_DM_ATTR_PROTO, /* u16 */
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NET_DM_ATTR_PAYLOAD, /* binary */
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NET_DM_ATTR_PAD,
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NET_DM_ATTR_TRUNC_LEN, /* u32 */
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NET_DM_ATTR_ORIG_LEN, /* u32 */
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__NET_DM_ATTR_MAX,
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NET_DM_ATTR_MAX = __NET_DM_ATTR_MAX - 1
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};
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/**
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* enum net_dm_alert_mode - Alert mode.
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* @NET_DM_ALERT_MODE_SUMMARY: A summary of recent drops is sent to user space.
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* @NET_DM_ALERT_MODE_PACKET: Each dropped packet is sent to user space along
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* with metadata.
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*/
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enum net_dm_alert_mode {
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NET_DM_ALERT_MODE_SUMMARY,
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NET_DM_ALERT_MODE_PACKET,
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};
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enum {
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NET_DM_ATTR_PORT_NETDEV_IFINDEX, /* u32 */
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__NET_DM_ATTR_PORT_MAX,
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NET_DM_ATTR_PORT_MAX = __NET_DM_ATTR_PORT_MAX - 1
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};
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#endif
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