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 
8 struct 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 
25 struct net_dm_config_entry {
26 	__u32 type;
27 	__u64 data __attribute__((aligned(8)));
28 };
29 
30 struct net_dm_config_msg {
31 	__u32 entries;
32 	struct net_dm_config_entry options[];
33 };
34 
35 struct net_dm_alert_msg {
36 	__u32 entries;
37 	struct net_dm_drop_point points[];
38 };
39 
40 struct 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 
50 enum {
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 
71 enum 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  */
108 enum net_dm_alert_mode {
109 	NET_DM_ALERT_MODE_SUMMARY,
110 	NET_DM_ALERT_MODE_PACKET,
111 };
112 
113 enum {
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 
121 enum {
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 
128 enum net_dm_origin {
129 	NET_DM_ORIGIN_SW,
130 	NET_DM_ORIGIN_HW,
131 };
132 
133 #endif
134