1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux 1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef __LINUX_NEIGHBOUR_H 2 #ifndef __LINUX_NEIGHBOUR_H
3 #define __LINUX_NEIGHBOUR_H 3 #define __LINUX_NEIGHBOUR_H
4 4
5 #include <linux/types.h> 5 #include <linux/types.h>
6 #include <linux/netlink.h> 6 #include <linux/netlink.h>
7 7
8 struct ndmsg { 8 struct ndmsg {
9 __u8 ndm_family; 9 __u8 ndm_family;
10 __u8 ndm_pad1; 10 __u8 ndm_pad1;
11 __u16 ndm_pad2; 11 __u16 ndm_pad2;
12 __s32 ndm_ifindex; 12 __s32 ndm_ifindex;
13 __u16 ndm_state; 13 __u16 ndm_state;
14 __u8 ndm_flags; 14 __u8 ndm_flags;
15 __u8 ndm_type; 15 __u8 ndm_type;
16 }; 16 };
17 17
18 enum { 18 enum {
19 NDA_UNSPEC, 19 NDA_UNSPEC,
20 NDA_DST, 20 NDA_DST,
21 NDA_LLADDR, 21 NDA_LLADDR,
22 NDA_CACHEINFO, 22 NDA_CACHEINFO,
23 NDA_PROBES, 23 NDA_PROBES,
24 NDA_VLAN, 24 NDA_VLAN,
25 NDA_PORT, 25 NDA_PORT,
26 NDA_VNI, 26 NDA_VNI,
27 NDA_IFINDEX, 27 NDA_IFINDEX,
28 NDA_MASTER, 28 NDA_MASTER,
29 NDA_LINK_NETNSID, 29 NDA_LINK_NETNSID,
30 NDA_SRC_VNI, 30 NDA_SRC_VNI,
31 NDA_PROTOCOL, /* Originator of entry 31 NDA_PROTOCOL, /* Originator of entry */
32 NDA_NH_ID, 32 NDA_NH_ID,
33 NDA_FDB_EXT_ATTRS, 33 NDA_FDB_EXT_ATTRS,
34 NDA_FLAGS_EXT, 34 NDA_FLAGS_EXT,
35 NDA_NDM_STATE_MASK, <<
36 NDA_NDM_FLAGS_MASK, <<
37 __NDA_MAX 35 __NDA_MAX
38 }; 36 };
39 37
40 #define NDA_MAX (__NDA_MAX - 1) 38 #define NDA_MAX (__NDA_MAX - 1)
41 39
42 /* 40 /*
43 * Neighbor Cache Entry Flags 41 * Neighbor Cache Entry Flags
44 */ 42 */
45 43
46 #define NTF_USE (1 << 0) 44 #define NTF_USE (1 << 0)
47 #define NTF_SELF (1 << 1) 45 #define NTF_SELF (1 << 1)
48 #define NTF_MASTER (1 << 2) 46 #define NTF_MASTER (1 << 2)
49 #define NTF_PROXY (1 << 3) /* == 47 #define NTF_PROXY (1 << 3) /* == ATF_PUBL */
50 #define NTF_EXT_LEARNED (1 << 4) 48 #define NTF_EXT_LEARNED (1 << 4)
51 #define NTF_OFFLOADED (1 << 5) 49 #define NTF_OFFLOADED (1 << 5)
52 #define NTF_STICKY (1 << 6) 50 #define NTF_STICKY (1 << 6)
53 #define NTF_ROUTER (1 << 7) 51 #define NTF_ROUTER (1 << 7)
54 /* Extended flags under NDA_FLAGS_EXT: */ 52 /* Extended flags under NDA_FLAGS_EXT: */
55 #define NTF_EXT_MANAGED (1 << 0) !! 53 #define NTF_EXT_MANAGED (1 << 0)
56 #define NTF_EXT_LOCKED (1 << 1) <<
57 54
58 /* 55 /*
59 * Neighbor Cache Entry States. 56 * Neighbor Cache Entry States.
60 */ 57 */
61 58
62 #define NUD_INCOMPLETE 0x01 59 #define NUD_INCOMPLETE 0x01
63 #define NUD_REACHABLE 0x02 60 #define NUD_REACHABLE 0x02
64 #define NUD_STALE 0x04 61 #define NUD_STALE 0x04
65 #define NUD_DELAY 0x08 62 #define NUD_DELAY 0x08
66 #define NUD_PROBE 0x10 63 #define NUD_PROBE 0x10
67 #define NUD_FAILED 0x20 64 #define NUD_FAILED 0x20
68 65
69 /* Dummy states */ 66 /* Dummy states */
70 #define NUD_NOARP 0x40 67 #define NUD_NOARP 0x40
71 #define NUD_PERMANENT 0x80 68 #define NUD_PERMANENT 0x80
72 #define NUD_NONE 0x00 69 #define NUD_NONE 0x00
73 70
74 /* NUD_NOARP & NUD_PERMANENT are pseudostates, 71 /* NUD_NOARP & NUD_PERMANENT are pseudostates, they never change and make no
75 * address resolution or NUD. 72 * address resolution or NUD.
76 * 73 *
77 * NUD_PERMANENT also cannot be deleted by gar 74 * NUD_PERMANENT also cannot be deleted by garbage collectors. This holds true
78 * for dynamic entries with NTF_EXT_LEARNED fl 75 * for dynamic entries with NTF_EXT_LEARNED flag as well. However, upon carrier
79 * down event, NUD_PERMANENT entries are not f 76 * down event, NUD_PERMANENT entries are not flushed whereas NTF_EXT_LEARNED
80 * flagged entries explicitly are (which is al 77 * flagged entries explicitly are (which is also consistent with the routing
81 * subsystem). 78 * subsystem).
82 * 79 *
83 * When NTF_EXT_LEARNED is set for a bridge fd 80 * When NTF_EXT_LEARNED is set for a bridge fdb entry the different cache entry
84 * states don't make sense and thus are ignore 81 * states don't make sense and thus are ignored. Such entries don't age and
85 * can roam. 82 * can roam.
86 * 83 *
87 * NTF_EXT_MANAGED flagged neigbor entries are 84 * NTF_EXT_MANAGED flagged neigbor entries are managed by the kernel on behalf
88 * of a user space control plane, and automati 85 * of a user space control plane, and automatically refreshed so that (if
89 * possible) they remain in NUD_REACHABLE stat 86 * possible) they remain in NUD_REACHABLE state.
90 * <<
91 * NTF_EXT_LOCKED flagged bridge FDB entries a <<
92 * bridge in response to a host trying to comm <<
93 * with MAB enabled. Their purpose is to notif <<
94 * authentication. <<
95 */ 87 */
96 88
97 struct nda_cacheinfo { 89 struct nda_cacheinfo {
98 __u32 ndm_confirmed; 90 __u32 ndm_confirmed;
99 __u32 ndm_used; 91 __u32 ndm_used;
100 __u32 ndm_updated; 92 __u32 ndm_updated;
101 __u32 ndm_refcnt; 93 __u32 ndm_refcnt;
102 }; 94 };
103 95
104 /********************************************* 96 /*****************************************************************
105 * Neighbour tables specific mess 97 * Neighbour tables specific messages.
106 * 98 *
107 * To retrieve the neighbour tables send RTM_G 99 * To retrieve the neighbour tables send RTM_GETNEIGHTBL with the
108 * NLM_F_DUMP flag set. Every neighbour table 100 * NLM_F_DUMP flag set. Every neighbour table configuration is
109 * spread over multiple messages to avoid runn 101 * spread over multiple messages to avoid running into message
110 * size limits on systems with many interfaces 102 * size limits on systems with many interfaces. The first message
111 * in the sequence transports all not device s 103 * in the sequence transports all not device specific data such as
112 * statistics, configuration, and the default 104 * statistics, configuration, and the default parameter set.
113 * This message is followed by 0..n messages c 105 * This message is followed by 0..n messages carrying device
114 * specific parameter sets. 106 * specific parameter sets.
115 * Although the ordering should be sufficient, 107 * Although the ordering should be sufficient, NDTA_NAME can be
116 * used to identify sequences. The initial mes 108 * used to identify sequences. The initial message can be identified
117 * by checking for NDTA_CONFIG. The device spe 109 * by checking for NDTA_CONFIG. The device specific messages do
118 * not contain this TLV but have NDTPA_IFINDEX 110 * not contain this TLV but have NDTPA_IFINDEX set to the
119 * corresponding interface index. 111 * corresponding interface index.
120 * 112 *
121 * To change neighbour table attributes, send 113 * To change neighbour table attributes, send RTM_SETNEIGHTBL
122 * with NDTA_NAME set. Changeable attribute in 114 * with NDTA_NAME set. Changeable attribute include NDTA_THRESH[1-3],
123 * NDTA_GC_INTERVAL, and all TLVs in NDTA_PARM 115 * NDTA_GC_INTERVAL, and all TLVs in NDTA_PARMS unless marked
124 * otherwise. Device specific parameter sets c 116 * otherwise. Device specific parameter sets can be changed by
125 * setting NDTPA_IFINDEX to the interface inde 117 * setting NDTPA_IFINDEX to the interface index of the corresponding
126 * device. 118 * device.
127 ****/ 119 ****/
128 120
129 struct ndt_stats { 121 struct ndt_stats {
130 __u64 ndts_allocs; 122 __u64 ndts_allocs;
131 __u64 ndts_destroys; 123 __u64 ndts_destroys;
132 __u64 ndts_hash_grows; 124 __u64 ndts_hash_grows;
133 __u64 ndts_res_failed; 125 __u64 ndts_res_failed;
134 __u64 ndts_lookups; 126 __u64 ndts_lookups;
135 __u64 ndts_hits; 127 __u64 ndts_hits;
136 __u64 ndts_rcv_probes_mcast; 128 __u64 ndts_rcv_probes_mcast;
137 __u64 ndts_rcv_probes_ucast; 129 __u64 ndts_rcv_probes_ucast;
138 __u64 ndts_periodic_gc_runs; 130 __u64 ndts_periodic_gc_runs;
139 __u64 ndts_forced_gc_runs; 131 __u64 ndts_forced_gc_runs;
140 __u64 ndts_table_fulls; 132 __u64 ndts_table_fulls;
141 }; 133 };
142 134
143 enum { 135 enum {
144 NDTPA_UNSPEC, 136 NDTPA_UNSPEC,
145 NDTPA_IFINDEX, /* u32 137 NDTPA_IFINDEX, /* u32, unchangeable */
146 NDTPA_REFCNT, /* u32 138 NDTPA_REFCNT, /* u32, read-only */
147 NDTPA_REACHABLE_TIME, /* u64 139 NDTPA_REACHABLE_TIME, /* u64, read-only, msecs */
148 NDTPA_BASE_REACHABLE_TIME, /* u64 140 NDTPA_BASE_REACHABLE_TIME, /* u64, msecs */
149 NDTPA_RETRANS_TIME, /* u64 141 NDTPA_RETRANS_TIME, /* u64, msecs */
150 NDTPA_GC_STALETIME, /* u64 142 NDTPA_GC_STALETIME, /* u64, msecs */
151 NDTPA_DELAY_PROBE_TIME, /* u64 143 NDTPA_DELAY_PROBE_TIME, /* u64, msecs */
152 NDTPA_QUEUE_LEN, /* u32 144 NDTPA_QUEUE_LEN, /* u32 */
153 NDTPA_APP_PROBES, /* u32 145 NDTPA_APP_PROBES, /* u32 */
154 NDTPA_UCAST_PROBES, /* u32 146 NDTPA_UCAST_PROBES, /* u32 */
155 NDTPA_MCAST_PROBES, /* u32 147 NDTPA_MCAST_PROBES, /* u32 */
156 NDTPA_ANYCAST_DELAY, /* u64 148 NDTPA_ANYCAST_DELAY, /* u64, msecs */
157 NDTPA_PROXY_DELAY, /* u64 149 NDTPA_PROXY_DELAY, /* u64, msecs */
158 NDTPA_PROXY_QLEN, /* u32 150 NDTPA_PROXY_QLEN, /* u32 */
159 NDTPA_LOCKTIME, /* u64 151 NDTPA_LOCKTIME, /* u64, msecs */
160 NDTPA_QUEUE_LENBYTES, /* u32 152 NDTPA_QUEUE_LENBYTES, /* u32 */
161 NDTPA_MCAST_REPROBES, /* u32 153 NDTPA_MCAST_REPROBES, /* u32 */
162 NDTPA_PAD, 154 NDTPA_PAD,
163 NDTPA_INTERVAL_PROBE_TIME_MS, /* u64 <<
164 __NDTPA_MAX 155 __NDTPA_MAX
165 }; 156 };
166 #define NDTPA_MAX (__NDTPA_MAX - 1) 157 #define NDTPA_MAX (__NDTPA_MAX - 1)
167 158
168 struct ndtmsg { 159 struct ndtmsg {
169 __u8 ndtm_family; 160 __u8 ndtm_family;
170 __u8 ndtm_pad1; 161 __u8 ndtm_pad1;
171 __u16 ndtm_pad2; 162 __u16 ndtm_pad2;
172 }; 163 };
173 164
174 struct ndt_config { 165 struct ndt_config {
175 __u16 ndtc_key_len; 166 __u16 ndtc_key_len;
176 __u16 ndtc_entry_size; 167 __u16 ndtc_entry_size;
177 __u32 ndtc_entries; 168 __u32 ndtc_entries;
178 __u32 ndtc_last_flush; 169 __u32 ndtc_last_flush; /* delta to now in msecs */
179 __u32 ndtc_last_rand; 170 __u32 ndtc_last_rand; /* delta to now in msecs */
180 __u32 ndtc_hash_rnd; 171 __u32 ndtc_hash_rnd;
181 __u32 ndtc_hash_mask; 172 __u32 ndtc_hash_mask;
182 __u32 ndtc_hash_chain_gc; 173 __u32 ndtc_hash_chain_gc;
183 __u32 ndtc_proxy_qlen; 174 __u32 ndtc_proxy_qlen;
184 }; 175 };
185 176
186 enum { 177 enum {
187 NDTA_UNSPEC, 178 NDTA_UNSPEC,
188 NDTA_NAME, /* cha 179 NDTA_NAME, /* char *, unchangeable */
189 NDTA_THRESH1, /* u32 180 NDTA_THRESH1, /* u32 */
190 NDTA_THRESH2, /* u32 181 NDTA_THRESH2, /* u32 */
191 NDTA_THRESH3, /* u32 182 NDTA_THRESH3, /* u32 */
192 NDTA_CONFIG, /* str 183 NDTA_CONFIG, /* struct ndt_config, read-only */
193 NDTA_PARMS, /* nes 184 NDTA_PARMS, /* nested TLV NDTPA_* */
194 NDTA_STATS, /* str 185 NDTA_STATS, /* struct ndt_stats, read-only */
195 NDTA_GC_INTERVAL, /* u64 186 NDTA_GC_INTERVAL, /* u64, msecs */
196 NDTA_PAD, 187 NDTA_PAD,
197 __NDTA_MAX 188 __NDTA_MAX
198 }; 189 };
199 #define NDTA_MAX (__NDTA_MAX - 1) 190 #define NDTA_MAX (__NDTA_MAX - 1)
200 191
201 /* FDB activity notification bits used in NFE 192 /* FDB activity notification bits used in NFEA_ACTIVITY_NOTIFY:
202 * - FDB_NOTIFY_BIT - notify on activity/expi 193 * - FDB_NOTIFY_BIT - notify on activity/expire for any entry
203 * - FDB_NOTIFY_INACTIVE_BIT - mark as inacti 194 * - FDB_NOTIFY_INACTIVE_BIT - mark as inactive to avoid multiple notifications
204 */ 195 */
205 enum { 196 enum {
206 FDB_NOTIFY_BIT = (1 << 0), 197 FDB_NOTIFY_BIT = (1 << 0),
207 FDB_NOTIFY_INACTIVE_BIT = (1 << 1) 198 FDB_NOTIFY_INACTIVE_BIT = (1 << 1)
208 }; 199 };
209 200
210 /* embedded into NDA_FDB_EXT_ATTRS: 201 /* embedded into NDA_FDB_EXT_ATTRS:
211 * [NDA_FDB_EXT_ATTRS] = { 202 * [NDA_FDB_EXT_ATTRS] = {
212 * [NFEA_ACTIVITY_NOTIFY] 203 * [NFEA_ACTIVITY_NOTIFY]
213 * ... 204 * ...
214 * } 205 * }
215 */ 206 */
216 enum { 207 enum {
217 NFEA_UNSPEC, 208 NFEA_UNSPEC,
218 NFEA_ACTIVITY_NOTIFY, 209 NFEA_ACTIVITY_NOTIFY,
219 NFEA_DONT_REFRESH, 210 NFEA_DONT_REFRESH,
220 __NFEA_MAX 211 __NFEA_MAX
221 }; 212 };
222 #define NFEA_MAX (__NFEA_MAX - 1) 213 #define NFEA_MAX (__NFEA_MAX - 1)
223 214
224 #endif 215 #endif
225 216
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