1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef __NET_DROPMON_H
3#define __NET_DROPMON_H
4
5#include <linux/types.h>
6#include <linux/netlink.h>
7
8struct net_dm_drop_point {
9	__u8 pc[8];
10	__u32 count;
11};
12
13#define is_drop_point_hw(x) do {\
14	int ____i, ____j;\
15	for (____i = 0; ____i < 8; i ____i++)\
16		____j |= x[____i];\
17	____j;\
18} while (0)
19
20#define NET_DM_CFG_VERSION  0
21#define NET_DM_CFG_ALERT_COUNT  1
22#define NET_DM_CFG_ALERT_DELAY 2
23#define NET_DM_CFG_MAX 3
24
25struct net_dm_config_entry {
26	__u32 type;
27	__u64 data __attribute__((aligned(8)));
28};
29
30struct net_dm_config_msg {
31	__u32 entries;
32	struct net_dm_config_entry options[];
33};
34
35struct net_dm_alert_msg {
36	__u32 entries;
37	struct net_dm_drop_point points[];
38};
39
40struct net_dm_user_msg {
41	union {
42		struct net_dm_config_msg user;
43		struct net_dm_alert_msg alert;
44	} u;
45};
46
47
48/* These are the netlink message types for this protocol */
49
50enum {
51	NET_DM_CMD_UNSPEC = 0,
52	NET_DM_CMD_ALERT,
53	NET_DM_CMD_CONFIG,
54	NET_DM_CMD_START,
55	NET_DM_CMD_STOP,
56	NET_DM_CMD_PACKET_ALERT,
57	NET_DM_CMD_CONFIG_GET,
58	NET_DM_CMD_CONFIG_NEW,
59	NET_DM_CMD_STATS_GET,
60	NET_DM_CMD_STATS_NEW,
61	_NET_DM_CMD_MAX,
62};
63
64#define NET_DM_CMD_MAX (_NET_DM_CMD_MAX - 1)
65
66/*
67 * Our group identifiers
68 */
69#define NET_DM_GRP_ALERT 1
70
71enum net_dm_attr {
72	NET_DM_ATTR_UNSPEC,
73
74	NET_DM_ATTR_ALERT_MODE,			/* u8 */
75	NET_DM_ATTR_PC,				/* u64 */
76	NET_DM_ATTR_SYMBOL,			/* string */
77	NET_DM_ATTR_IN_PORT,			/* nested */
78	NET_DM_ATTR_TIMESTAMP,			/* u64 */
79	NET_DM_ATTR_PROTO,			/* u16 */
80	NET_DM_ATTR_PAYLOAD,			/* binary */
81	NET_DM_ATTR_PAD,
82	NET_DM_ATTR_TRUNC_LEN,			/* u32 */
83	NET_DM_ATTR_ORIG_LEN,			/* u32 */
84	NET_DM_ATTR_QUEUE_LEN,			/* u32 */
85	NET_DM_ATTR_STATS,			/* nested */
86	NET_DM_ATTR_HW_STATS,			/* nested */
87	NET_DM_ATTR_ORIGIN,			/* u16 */
88	NET_DM_ATTR_HW_TRAP_GROUP_NAME,		/* string */
89	NET_DM_ATTR_HW_TRAP_NAME,		/* string */
90	NET_DM_ATTR_HW_ENTRIES,			/* nested */
91	NET_DM_ATTR_HW_ENTRY,			/* nested */
92	NET_DM_ATTR_HW_TRAP_COUNT,		/* u32 */
93	NET_DM_ATTR_SW_DROPS,			/* flag */
94	NET_DM_ATTR_HW_DROPS,			/* flag */
95	NET_DM_ATTR_FLOW_ACTION_COOKIE,		/* binary */
96	NET_DM_ATTR_REASON,			/* string */
97
98	__NET_DM_ATTR_MAX,
99	NET_DM_ATTR_MAX = __NET_DM_ATTR_MAX - 1
100};
101
102/**
103 * enum net_dm_alert_mode - Alert mode.
104 * @NET_DM_ALERT_MODE_SUMMARY: A summary of recent drops is sent to user space.
105 * @NET_DM_ALERT_MODE_PACKET: Each dropped packet is sent to user space along
106 *                            with metadata.
107 */
108enum net_dm_alert_mode {
109	NET_DM_ALERT_MODE_SUMMARY,
110	NET_DM_ALERT_MODE_PACKET,
111};
112
113enum {
114	NET_DM_ATTR_PORT_NETDEV_IFINDEX,	/* u32 */
115	NET_DM_ATTR_PORT_NETDEV_NAME,		/* string */
116
117	__NET_DM_ATTR_PORT_MAX,
118	NET_DM_ATTR_PORT_MAX = __NET_DM_ATTR_PORT_MAX - 1
119};
120
121enum {
122	NET_DM_ATTR_STATS_DROPPED,		/* u64 */
123
124	__NET_DM_ATTR_STATS_MAX,
125	NET_DM_ATTR_STATS_MAX = __NET_DM_ATTR_STATS_MAX - 1
126};
127
128enum net_dm_origin {
129	NET_DM_ORIGIN_SW,
130	NET_DM_ORIGIN_HW,
131};
132
133#endif
134