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1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 
3 /*
4  * Copyright (c) 2007-2017 Nicira, Inc.
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of version 2 of the GNU General Public
8  * License as published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  * General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
18  * 02110-1301, USA
19  */
20 
21 #ifndef _UAPI__LINUX_OPENVSWITCH_H
22 #define _UAPI__LINUX_OPENVSWITCH_H 1
23 
24 #include <linux/types.h>
25 #include <linux/if_ether.h>
26 
27 /**
28  * struct ovs_header - header for OVS Generic Netlink messages.
29  * @dp_ifindex: ifindex of local port for datapath (0 to make a request not
30  * specific to a datapath).
31  *
32  * Attributes following the header are specific to a particular OVS Generic
33  * Netlink family, but all of the OVS families use this header.
34  */
35 
36 struct ovs_header {
37 	int dp_ifindex;
38 };
39 
40 /* Datapaths. */
41 
42 #define OVS_DATAPATH_FAMILY  "ovs_datapath"
43 #define OVS_DATAPATH_MCGROUP "ovs_datapath"
44 
45 /* V2:
46  *   - API users are expected to provide OVS_DP_ATTR_USER_FEATURES
47  *     when creating the datapath.
48  */
49 #define OVS_DATAPATH_VERSION 2
50 
51 /* First OVS datapath version to support features */
52 #define OVS_DP_VER_FEATURES 2
53 
54 enum ovs_datapath_cmd {
55 	OVS_DP_CMD_UNSPEC,
56 	OVS_DP_CMD_NEW,
57 	OVS_DP_CMD_DEL,
58 	OVS_DP_CMD_GET,
59 	OVS_DP_CMD_SET
60 };
61 
62 /**
63  * enum ovs_datapath_attr - attributes for %OVS_DP_* commands.
64  * @OVS_DP_ATTR_NAME: Name of the network device that serves as the "local
65  * port".  This is the name of the network device whose dp_ifindex is given in
66  * the &struct ovs_header.  Always present in notifications.  Required in
67  * %OVS_DP_NEW requests.  May be used as an alternative to specifying
68  * dp_ifindex in other requests (with a dp_ifindex of 0).
69  * @OVS_DP_ATTR_UPCALL_PID: The Netlink socket in userspace that is initially
70  * set on the datapath port (for OVS_ACTION_ATTR_MISS).  Only valid on
71  * %OVS_DP_CMD_NEW requests. A value of zero indicates that upcalls should
72  * not be sent.
73  * @OVS_DP_ATTR_PER_CPU_PIDS: Per-cpu array of PIDs for upcalls when
74  * OVS_DP_F_DISPATCH_UPCALL_PER_CPU feature is set.
75  * @OVS_DP_ATTR_STATS: Statistics about packets that have passed through the
76  * datapath.  Always present in notifications.
77  * @OVS_DP_ATTR_MEGAFLOW_STATS: Statistics about mega flow masks usage for the
78  * datapath. Always present in notifications.
79  * @OVS_DP_ATTR_IFINDEX: Interface index for a new datapath netdev. Only
80  * valid for %OVS_DP_CMD_NEW requests.
81  *
82  * These attributes follow the &struct ovs_header within the Generic Netlink
83  * payload for %OVS_DP_* commands.
84  */
85 enum ovs_datapath_attr {
86 	OVS_DP_ATTR_UNSPEC,
87 	OVS_DP_ATTR_NAME,		/* name of dp_ifindex netdev */
88 	OVS_DP_ATTR_UPCALL_PID,		/* Netlink PID to receive upcalls */
89 	OVS_DP_ATTR_STATS,		/* struct ovs_dp_stats */
90 	OVS_DP_ATTR_MEGAFLOW_STATS,	/* struct ovs_dp_megaflow_stats */
91 	OVS_DP_ATTR_USER_FEATURES,	/* OVS_DP_F_*  */
92 	OVS_DP_ATTR_PAD,
93 	OVS_DP_ATTR_MASKS_CACHE_SIZE,
94 	OVS_DP_ATTR_PER_CPU_PIDS,   /* Netlink PIDS to receive upcalls in
95 				     * per-cpu dispatch mode
96 				     */
97 	OVS_DP_ATTR_IFINDEX,
98 	__OVS_DP_ATTR_MAX
99 };
100 
101 #define OVS_DP_ATTR_MAX (__OVS_DP_ATTR_MAX - 1)
102 
103 struct ovs_dp_stats {
104 	__u64 n_hit;             /* Number of flow table matches. */
105 	__u64 n_missed;          /* Number of flow table misses. */
106 	__u64 n_lost;            /* Number of misses not sent to userspace. */
107 	__u64 n_flows;           /* Number of flows present */
108 };
109 
110 struct ovs_dp_megaflow_stats {
111 	__u64 n_mask_hit;	 /* Number of masks used for flow lookups. */
112 	__u32 n_masks;		 /* Number of masks for the datapath. */
113 	__u32 pad0;		 /* Pad for future expension. */
114 	__u64 n_cache_hit;       /* Number of cache matches for flow lookups. */
115 	__u64 pad1;		 /* Pad for future expension. */
116 };
117 
118 struct ovs_vport_stats {
119 	__u64   rx_packets;		/* total packets received       */
120 	__u64   tx_packets;		/* total packets transmitted    */
121 	__u64   rx_bytes;		/* total bytes received         */
122 	__u64   tx_bytes;		/* total bytes transmitted      */
123 	__u64   rx_errors;		/* bad packets received         */
124 	__u64   tx_errors;		/* packet transmit problems     */
125 	__u64   rx_dropped;		/* no space in linux buffers    */
126 	__u64   tx_dropped;		/* no space available in linux  */
127 };
128 
129 /* Allow last Netlink attribute to be unaligned */
130 #define OVS_DP_F_UNALIGNED	(1 << 0)
131 
132 /* Allow datapath to associate multiple Netlink PIDs to each vport */
133 #define OVS_DP_F_VPORT_PIDS	(1 << 1)
134 
135 /* Allow tc offload recirc sharing */
136 #define OVS_DP_F_TC_RECIRC_SHARING	(1 << 2)
137 
138 /* Allow per-cpu dispatch of upcalls */
139 #define OVS_DP_F_DISPATCH_UPCALL_PER_CPU	(1 << 3)
140 
141 /* Fixed logical ports. */
142 #define OVSP_LOCAL      ((__u32)0)
143 
144 /* Packet transfer. */
145 
146 #define OVS_PACKET_FAMILY "ovs_packet"
147 #define OVS_PACKET_VERSION 0x1
148 
149 enum ovs_packet_cmd {
150 	OVS_PACKET_CMD_UNSPEC,
151 
152 	/* Kernel-to-user notifications. */
153 	OVS_PACKET_CMD_MISS,    /* Flow table miss. */
154 	OVS_PACKET_CMD_ACTION,  /* OVS_ACTION_ATTR_USERSPACE action. */
155 
156 	/* Userspace commands. */
157 	OVS_PACKET_CMD_EXECUTE  /* Apply actions to a packet. */
158 };
159 
160 /**
161  * enum ovs_packet_attr - attributes for %OVS_PACKET_* commands.
162  * @OVS_PACKET_ATTR_PACKET: Present for all notifications.  Contains the entire
163  * packet as received, from the start of the Ethernet header onward.  For
164  * %OVS_PACKET_CMD_ACTION, %OVS_PACKET_ATTR_PACKET reflects changes made by
165  * actions preceding %OVS_ACTION_ATTR_USERSPACE, but %OVS_PACKET_ATTR_KEY is
166  * the flow key extracted from the packet as originally received.
167  * @OVS_PACKET_ATTR_KEY: Present for all notifications.  Contains the flow key
168  * extracted from the packet as nested %OVS_KEY_ATTR_* attributes.  This allows
169  * userspace to adapt its flow setup strategy by comparing its notion of the
170  * flow key against the kernel's.
171  * @OVS_PACKET_ATTR_ACTIONS: Contains actions for the packet.  Used
172  * for %OVS_PACKET_CMD_EXECUTE.  It has nested %OVS_ACTION_ATTR_* attributes.
173  * Also used in upcall when %OVS_ACTION_ATTR_USERSPACE has optional
174  * %OVS_USERSPACE_ATTR_ACTIONS attribute.
175  * @OVS_PACKET_ATTR_USERDATA: Present for an %OVS_PACKET_CMD_ACTION
176  * notification if the %OVS_ACTION_ATTR_USERSPACE action specified an
177  * %OVS_USERSPACE_ATTR_USERDATA attribute, with the same length and content
178  * specified there.
179  * @OVS_PACKET_ATTR_EGRESS_TUN_KEY: Present for an %OVS_PACKET_CMD_ACTION
180  * notification if the %OVS_ACTION_ATTR_USERSPACE action specified an
181  * %OVS_USERSPACE_ATTR_EGRESS_TUN_PORT attribute, which is sent only if the
182  * output port is actually a tunnel port. Contains the output tunnel key
183  * extracted from the packet as nested %OVS_TUNNEL_KEY_ATTR_* attributes.
184  * @OVS_PACKET_ATTR_MRU: Present for an %OVS_PACKET_CMD_ACTION and
185  * @OVS_PACKET_ATTR_LEN: Packet size before truncation.
186  * %OVS_PACKET_ATTR_USERSPACE action specify the Maximum received fragment
187  * size.
188  * @OVS_PACKET_ATTR_HASH: Packet hash info (e.g. hash, sw_hash and l4_hash in skb).
189  *
190  * These attributes follow the &struct ovs_header within the Generic Netlink
191  * payload for %OVS_PACKET_* commands.
192  */
193 enum ovs_packet_attr {
194 	OVS_PACKET_ATTR_UNSPEC,
195 	OVS_PACKET_ATTR_PACKET,      /* Packet data. */
196 	OVS_PACKET_ATTR_KEY,         /* Nested OVS_KEY_ATTR_* attributes. */
197 	OVS_PACKET_ATTR_ACTIONS,     /* Nested OVS_ACTION_ATTR_* attributes. */
198 	OVS_PACKET_ATTR_USERDATA,    /* OVS_ACTION_ATTR_USERSPACE arg. */
199 	OVS_PACKET_ATTR_EGRESS_TUN_KEY,  /* Nested OVS_TUNNEL_KEY_ATTR_*
200 					    attributes. */
201 	OVS_PACKET_ATTR_UNUSED1,
202 	OVS_PACKET_ATTR_UNUSED2,
203 	OVS_PACKET_ATTR_PROBE,      /* Packet operation is a feature probe,
204 				       error logging should be suppressed. */
205 	OVS_PACKET_ATTR_MRU,	    /* Maximum received IP fragment size. */
206 	OVS_PACKET_ATTR_LEN,	    /* Packet size before truncation. */
207 	OVS_PACKET_ATTR_HASH,	    /* Packet hash. */
208 	__OVS_PACKET_ATTR_MAX
209 };
210 
211 #define OVS_PACKET_ATTR_MAX (__OVS_PACKET_ATTR_MAX - 1)
212 
213 /* Virtual ports. */
214 
215 #define OVS_VPORT_FAMILY  "ovs_vport"
216 #define OVS_VPORT_MCGROUP "ovs_vport"
217 #define OVS_VPORT_VERSION 0x1
218 
219 enum ovs_vport_cmd {
220 	OVS_VPORT_CMD_UNSPEC,
221 	OVS_VPORT_CMD_NEW,
222 	OVS_VPORT_CMD_DEL,
223 	OVS_VPORT_CMD_GET,
224 	OVS_VPORT_CMD_SET
225 };
226 
227 enum ovs_vport_type {
228 	OVS_VPORT_TYPE_UNSPEC,
229 	OVS_VPORT_TYPE_NETDEV,   /* network device */
230 	OVS_VPORT_TYPE_INTERNAL, /* network device implemented by datapath */
231 	OVS_VPORT_TYPE_GRE,      /* GRE tunnel. */
232 	OVS_VPORT_TYPE_VXLAN,	 /* VXLAN tunnel. */
233 	OVS_VPORT_TYPE_GENEVE,	 /* Geneve tunnel. */
234 	__OVS_VPORT_TYPE_MAX
235 };
236 
237 #define OVS_VPORT_TYPE_MAX (__OVS_VPORT_TYPE_MAX - 1)
238 
239 /**
240  * enum ovs_vport_attr - attributes for %OVS_VPORT_* commands.
241  * @OVS_VPORT_ATTR_PORT_NO: 32-bit port number within datapath.
242  * @OVS_VPORT_ATTR_TYPE: 32-bit %OVS_VPORT_TYPE_* constant describing the type
243  * of vport.
244  * @OVS_VPORT_ATTR_NAME: Name of vport.  For a vport based on a network device
245  * this is the name of the network device.  Maximum length %IFNAMSIZ-1 bytes
246  * plus a null terminator.
247  * @OVS_VPORT_ATTR_OPTIONS: Vport-specific configuration information.
248  * @OVS_VPORT_ATTR_UPCALL_PID: The array of Netlink socket pids in userspace
249  * among which OVS_PACKET_CMD_MISS upcalls will be distributed for packets
250  * received on this port.  If this is a single-element array of value 0,
251  * upcalls should not be sent.
252  * @OVS_VPORT_ATTR_STATS: A &struct ovs_vport_stats giving statistics for
253  * packets sent or received through the vport.
254  *
255  * These attributes follow the &struct ovs_header within the Generic Netlink
256  * payload for %OVS_VPORT_* commands.
257  *
258  * For %OVS_VPORT_CMD_NEW requests, the %OVS_VPORT_ATTR_TYPE and
259  * %OVS_VPORT_ATTR_NAME attributes are required.  %OVS_VPORT_ATTR_PORT_NO is
260  * optional; if not specified a free port number is automatically selected.
261  * Whether %OVS_VPORT_ATTR_OPTIONS is required or optional depends on the type
262  * of vport.
263  *
264  * For other requests, if %OVS_VPORT_ATTR_NAME is specified then it is used to
265  * look up the vport to operate on; otherwise dp_idx from the &struct
266  * ovs_header plus %OVS_VPORT_ATTR_PORT_NO determine the vport.
267  */
268 enum ovs_vport_attr {
269 	OVS_VPORT_ATTR_UNSPEC,
270 	OVS_VPORT_ATTR_PORT_NO,	/* u32 port number within datapath */
271 	OVS_VPORT_ATTR_TYPE,	/* u32 OVS_VPORT_TYPE_* constant. */
272 	OVS_VPORT_ATTR_NAME,	/* string name, up to IFNAMSIZ bytes long */
273 	OVS_VPORT_ATTR_OPTIONS, /* nested attributes, varies by vport type */
274 	OVS_VPORT_ATTR_UPCALL_PID, /* array of u32 Netlink socket PIDs for */
275 				/* receiving upcalls */
276 	OVS_VPORT_ATTR_STATS,	/* struct ovs_vport_stats */
277 	OVS_VPORT_ATTR_PAD,
278 	OVS_VPORT_ATTR_IFINDEX,
279 	OVS_VPORT_ATTR_NETNSID,
280 	OVS_VPORT_ATTR_UPCALL_STATS,
281 	__OVS_VPORT_ATTR_MAX
282 };
283 
284 #define OVS_VPORT_ATTR_MAX (__OVS_VPORT_ATTR_MAX - 1)
285 
286 /**
287  * enum ovs_vport_upcall_attr - attributes for %OVS_VPORT_UPCALL* commands
288  * @OVS_VPORT_UPCALL_SUCCESS: 64-bit upcall success packets.
289  * @OVS_VPORT_UPCALL_FAIL: 64-bit upcall fail packets.
290  */
291 enum ovs_vport_upcall_attr {
292 	OVS_VPORT_UPCALL_ATTR_SUCCESS,
293 	OVS_VPORT_UPCALL_ATTR_FAIL,
294 	__OVS_VPORT_UPCALL_ATTR_MAX
295 };
296 
297 #define OVS_VPORT_UPCALL_ATTR_MAX (__OVS_VPORT_UPCALL_ATTR_MAX - 1)
298 
299 enum {
300 	OVS_VXLAN_EXT_UNSPEC,
301 	OVS_VXLAN_EXT_GBP,	/* Flag or __u32 */
302 	__OVS_VXLAN_EXT_MAX,
303 };
304 
305 #define OVS_VXLAN_EXT_MAX (__OVS_VXLAN_EXT_MAX - 1)
306 
307 
308 /* OVS_VPORT_ATTR_OPTIONS attributes for tunnels.
309  */
310 enum {
311 	OVS_TUNNEL_ATTR_UNSPEC,
312 	OVS_TUNNEL_ATTR_DST_PORT, /* 16-bit UDP port, used by L4 tunnels. */
313 	OVS_TUNNEL_ATTR_EXTENSION,
314 	__OVS_TUNNEL_ATTR_MAX
315 };
316 
317 #define OVS_TUNNEL_ATTR_MAX (__OVS_TUNNEL_ATTR_MAX - 1)
318 
319 /* Flows. */
320 
321 #define OVS_FLOW_FAMILY  "ovs_flow"
322 #define OVS_FLOW_MCGROUP "ovs_flow"
323 #define OVS_FLOW_VERSION 0x1
324 
325 enum ovs_flow_cmd {
326 	OVS_FLOW_CMD_UNSPEC,
327 	OVS_FLOW_CMD_NEW,
328 	OVS_FLOW_CMD_DEL,
329 	OVS_FLOW_CMD_GET,
330 	OVS_FLOW_CMD_SET
331 };
332 
333 struct ovs_flow_stats {
334 	__u64 n_packets;         /* Number of matched packets. */
335 	__u64 n_bytes;           /* Number of matched bytes. */
336 };
337 
338 enum ovs_key_attr {
339 	OVS_KEY_ATTR_UNSPEC,
340 	OVS_KEY_ATTR_ENCAP,	/* Nested set of encapsulated attributes. */
341 	OVS_KEY_ATTR_PRIORITY,  /* u32 skb->priority */
342 	OVS_KEY_ATTR_IN_PORT,   /* u32 OVS dp port number */
343 	OVS_KEY_ATTR_ETHERNET,  /* struct ovs_key_ethernet */
344 	OVS_KEY_ATTR_VLAN,	/* be16 VLAN TCI */
345 	OVS_KEY_ATTR_ETHERTYPE,	/* be16 Ethernet type */
346 	OVS_KEY_ATTR_IPV4,      /* struct ovs_key_ipv4 */
347 	OVS_KEY_ATTR_IPV6,      /* struct ovs_key_ipv6 */
348 	OVS_KEY_ATTR_TCP,       /* struct ovs_key_tcp */
349 	OVS_KEY_ATTR_UDP,       /* struct ovs_key_udp */
350 	OVS_KEY_ATTR_ICMP,      /* struct ovs_key_icmp */
351 	OVS_KEY_ATTR_ICMPV6,    /* struct ovs_key_icmpv6 */
352 	OVS_KEY_ATTR_ARP,       /* struct ovs_key_arp */
353 	OVS_KEY_ATTR_ND,        /* struct ovs_key_nd */
354 	OVS_KEY_ATTR_SKB_MARK,  /* u32 skb mark */
355 	OVS_KEY_ATTR_TUNNEL,    /* Nested set of ovs_tunnel attributes */
356 	OVS_KEY_ATTR_SCTP,      /* struct ovs_key_sctp */
357 	OVS_KEY_ATTR_TCP_FLAGS,	/* be16 TCP flags. */
358 	OVS_KEY_ATTR_DP_HASH,      /* u32 hash value. Value 0 indicates the hash
359 				   is not computed by the datapath. */
360 	OVS_KEY_ATTR_RECIRC_ID, /* u32 recirc id */
361 	OVS_KEY_ATTR_MPLS,      /* array of struct ovs_key_mpls.
362 				 * The implementation may restrict
363 				 * the accepted length of the array. */
364 	OVS_KEY_ATTR_CT_STATE,	/* u32 bitmask of OVS_CS_F_* */
365 	OVS_KEY_ATTR_CT_ZONE,	/* u16 connection tracking zone. */
366 	OVS_KEY_ATTR_CT_MARK,	/* u32 connection tracking mark */
367 	OVS_KEY_ATTR_CT_LABELS,	/* 16-octet connection tracking label */
368 	OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4,   /* struct ovs_key_ct_tuple_ipv4 */
369 	OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6,   /* struct ovs_key_ct_tuple_ipv6 */
370 	OVS_KEY_ATTR_NSH,       /* Nested set of ovs_nsh_key_* */
371 
372 	/* User space decided to squat on types 29 and 30.  They are defined
373 	 * below, but should not be sent to the kernel.
374 	 *
375 	 * WARNING: No new types should be added unless they are defined
376 	 *          for both kernel and user space (no 'ifdef's).  It's hard
377 	 *          to keep compatibility otherwise.
378 	 */
379 	OVS_KEY_ATTR_PACKET_TYPE,   /* be32 packet type */
380 	OVS_KEY_ATTR_ND_EXTENSIONS, /* IPv6 Neighbor Discovery extensions */
381 
382 	OVS_KEY_ATTR_TUNNEL_INFO,   /* struct ip_tunnel_info.
383 				     * For in-kernel use only.
384 				     */
385 	OVS_KEY_ATTR_IPV6_EXTHDRS,  /* struct ovs_key_ipv6_exthdr */
386 	__OVS_KEY_ATTR_MAX
387 };
388 
389 #define OVS_KEY_ATTR_MAX (__OVS_KEY_ATTR_MAX - 1)
390 
391 enum ovs_tunnel_key_attr {
392 	/* OVS_TUNNEL_KEY_ATTR_NONE, standard nl API requires this attribute! */
393 	OVS_TUNNEL_KEY_ATTR_ID,                 /* be64 Tunnel ID */
394 	OVS_TUNNEL_KEY_ATTR_IPV4_SRC,           /* be32 src IP address. */
395 	OVS_TUNNEL_KEY_ATTR_IPV4_DST,           /* be32 dst IP address. */
396 	OVS_TUNNEL_KEY_ATTR_TOS,                /* u8 Tunnel IP ToS. */
397 	OVS_TUNNEL_KEY_ATTR_TTL,                /* u8 Tunnel IP TTL. */
398 	OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT,      /* No argument, set DF. */
399 	OVS_TUNNEL_KEY_ATTR_CSUM,               /* No argument. CSUM packet. */
400 	OVS_TUNNEL_KEY_ATTR_OAM,                /* No argument. OAM frame.  */
401 	OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS,        /* Array of Geneve options. */
402 	OVS_TUNNEL_KEY_ATTR_TP_SRC,		/* be16 src Transport Port. */
403 	OVS_TUNNEL_KEY_ATTR_TP_DST,		/* be16 dst Transport Port. */
404 	OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS,		/* Nested OVS_VXLAN_EXT_* */
405 	OVS_TUNNEL_KEY_ATTR_IPV6_SRC,		/* struct in6_addr src IPv6 address. */
406 	OVS_TUNNEL_KEY_ATTR_IPV6_DST,		/* struct in6_addr dst IPv6 address. */
407 	OVS_TUNNEL_KEY_ATTR_PAD,
408 	OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS,	/* struct erspan_metadata */
409 	OVS_TUNNEL_KEY_ATTR_IPV4_INFO_BRIDGE,	/* No argument. IPV4_INFO_BRIDGE mode.*/
410 	__OVS_TUNNEL_KEY_ATTR_MAX
411 };
412 
413 #define OVS_TUNNEL_KEY_ATTR_MAX (__OVS_TUNNEL_KEY_ATTR_MAX - 1)
414 
415 /**
416  * enum ovs_frag_type - IPv4 and IPv6 fragment type
417  * @OVS_FRAG_TYPE_NONE: Packet is not a fragment.
418  * @OVS_FRAG_TYPE_FIRST: Packet is a fragment with offset 0.
419  * @OVS_FRAG_TYPE_LATER: Packet is a fragment with nonzero offset.
420  *
421  * Used as the @ipv4_frag in &struct ovs_key_ipv4 and as @ipv6_frag &struct
422  * ovs_key_ipv6.
423  */
424 enum ovs_frag_type {
425 	OVS_FRAG_TYPE_NONE,
426 	OVS_FRAG_TYPE_FIRST,
427 	OVS_FRAG_TYPE_LATER,
428 	__OVS_FRAG_TYPE_MAX
429 };
430 
431 #define OVS_FRAG_TYPE_MAX (__OVS_FRAG_TYPE_MAX - 1)
432 
433 struct ovs_key_ethernet {
434 	__u8	 eth_src[ETH_ALEN];
435 	__u8	 eth_dst[ETH_ALEN];
436 };
437 
438 struct ovs_key_mpls {
439 	__be32 mpls_lse;
440 };
441 
442 struct ovs_key_ipv4 {
443 	__be32 ipv4_src;
444 	__be32 ipv4_dst;
445 	__u8   ipv4_proto;
446 	__u8   ipv4_tos;
447 	__u8   ipv4_ttl;
448 	__u8   ipv4_frag;	/* One of OVS_FRAG_TYPE_*. */
449 };
450 
451 struct ovs_key_ipv6 {
452 	__be32 ipv6_src[4];
453 	__be32 ipv6_dst[4];
454 	__be32 ipv6_label;	/* 20-bits in least-significant bits. */
455 	__u8   ipv6_proto;
456 	__u8   ipv6_tclass;
457 	__u8   ipv6_hlimit;
458 	__u8   ipv6_frag;	/* One of OVS_FRAG_TYPE_*. */
459 };
460 
461 /* separate structure to support backward compatibility with older user space */
462 struct ovs_key_ipv6_exthdrs {
463 	__u16  hdrs;
464 };
465 
466 struct ovs_key_tcp {
467 	__be16 tcp_src;
468 	__be16 tcp_dst;
469 };
470 
471 struct ovs_key_udp {
472 	__be16 udp_src;
473 	__be16 udp_dst;
474 };
475 
476 struct ovs_key_sctp {
477 	__be16 sctp_src;
478 	__be16 sctp_dst;
479 };
480 
481 struct ovs_key_icmp {
482 	__u8 icmp_type;
483 	__u8 icmp_code;
484 };
485 
486 struct ovs_key_icmpv6 {
487 	__u8 icmpv6_type;
488 	__u8 icmpv6_code;
489 };
490 
491 struct ovs_key_arp {
492 	__be32 arp_sip;
493 	__be32 arp_tip;
494 	__be16 arp_op;
495 	__u8   arp_sha[ETH_ALEN];
496 	__u8   arp_tha[ETH_ALEN];
497 };
498 
499 struct ovs_key_nd {
500 	__be32	nd_target[4];
501 	__u8	nd_sll[ETH_ALEN];
502 	__u8	nd_tll[ETH_ALEN];
503 };
504 
505 #define OVS_CT_LABELS_LEN_32	4
506 #define OVS_CT_LABELS_LEN	(OVS_CT_LABELS_LEN_32 * sizeof(__u32))
507 struct ovs_key_ct_labels {
508 	union {
509 		__u8	ct_labels[OVS_CT_LABELS_LEN];
510 		__u32	ct_labels_32[OVS_CT_LABELS_LEN_32];
511 	};
512 };
513 
514 /* OVS_KEY_ATTR_CT_STATE flags */
515 #define OVS_CS_F_NEW               0x01 /* Beginning of a new connection. */
516 #define OVS_CS_F_ESTABLISHED       0x02 /* Part of an existing connection. */
517 #define OVS_CS_F_RELATED           0x04 /* Related to an established
518 					 * connection. */
519 #define OVS_CS_F_REPLY_DIR         0x08 /* Flow is in the reply direction. */
520 #define OVS_CS_F_INVALID           0x10 /* Could not track connection. */
521 #define OVS_CS_F_TRACKED           0x20 /* Conntrack has occurred. */
522 #define OVS_CS_F_SRC_NAT           0x40 /* Packet's source address/port was
523 					 * mangled by NAT.
524 					 */
525 #define OVS_CS_F_DST_NAT           0x80 /* Packet's destination address/port
526 					 * was mangled by NAT.
527 					 */
528 
529 #define OVS_CS_F_NAT_MASK (OVS_CS_F_SRC_NAT | OVS_CS_F_DST_NAT)
530 
531 struct ovs_key_ct_tuple_ipv4 {
532 	__be32 ipv4_src;
533 	__be32 ipv4_dst;
534 	__be16 src_port;
535 	__be16 dst_port;
536 	__u8   ipv4_proto;
537 };
538 
539 struct ovs_key_ct_tuple_ipv6 {
540 	__be32 ipv6_src[4];
541 	__be32 ipv6_dst[4];
542 	__be16 src_port;
543 	__be16 dst_port;
544 	__u8   ipv6_proto;
545 };
546 
547 enum ovs_nsh_key_attr {
548 	OVS_NSH_KEY_ATTR_UNSPEC,
549 	OVS_NSH_KEY_ATTR_BASE,  /* struct ovs_nsh_key_base. */
550 	OVS_NSH_KEY_ATTR_MD1,   /* struct ovs_nsh_key_md1. */
551 	OVS_NSH_KEY_ATTR_MD2,   /* variable-length octets for MD type 2. */
552 	__OVS_NSH_KEY_ATTR_MAX
553 };
554 
555 #define OVS_NSH_KEY_ATTR_MAX (__OVS_NSH_KEY_ATTR_MAX - 1)
556 
557 struct ovs_nsh_key_base {
558 	__u8 flags;
559 	__u8 ttl;
560 	__u8 mdtype;
561 	__u8 np;
562 	__be32 path_hdr;
563 };
564 
565 #define NSH_MD1_CONTEXT_SIZE 4
566 
567 struct ovs_nsh_key_md1 {
568 	__be32 context[NSH_MD1_CONTEXT_SIZE];
569 };
570 
571 /**
572  * enum ovs_flow_attr - attributes for %OVS_FLOW_* commands.
573  * @OVS_FLOW_ATTR_KEY: Nested %OVS_KEY_ATTR_* attributes specifying the flow
574  * key.  Always present in notifications.  Required for all requests (except
575  * dumps).
576  * @OVS_FLOW_ATTR_ACTIONS: Nested %OVS_ACTION_ATTR_* attributes specifying
577  * the actions to take for packets that match the key.  Always present in
578  * notifications.  Required for %OVS_FLOW_CMD_NEW requests, optional for
579  * %OVS_FLOW_CMD_SET requests.  An %OVS_FLOW_CMD_SET without
580  * %OVS_FLOW_ATTR_ACTIONS will not modify the actions.  To clear the actions,
581  * an %OVS_FLOW_ATTR_ACTIONS without any nested attributes must be given.
582  * @OVS_FLOW_ATTR_STATS: &struct ovs_flow_stats giving statistics for this
583  * flow.  Present in notifications if the stats would be nonzero.  Ignored in
584  * requests.
585  * @OVS_FLOW_ATTR_TCP_FLAGS: An 8-bit value giving the OR'd value of all of the
586  * TCP flags seen on packets in this flow.  Only present in notifications for
587  * TCP flows, and only if it would be nonzero.  Ignored in requests.
588  * @OVS_FLOW_ATTR_USED: A 64-bit integer giving the time, in milliseconds on
589  * the system monotonic clock, at which a packet was last processed for this
590  * flow.  Only present in notifications if a packet has been processed for this
591  * flow.  Ignored in requests.
592  * @OVS_FLOW_ATTR_CLEAR: If present in a %OVS_FLOW_CMD_SET request, clears the
593  * last-used time, accumulated TCP flags, and statistics for this flow.
594  * Otherwise ignored in requests.  Never present in notifications.
595  * @OVS_FLOW_ATTR_MASK: Nested %OVS_KEY_ATTR_* attributes specifying the
596  * mask bits for wildcarded flow match. Mask bit value '1' specifies exact
597  * match with corresponding flow key bit, while mask bit value '0' specifies
598  * a wildcarded match. Omitting attribute is treated as wildcarding all
599  * corresponding fields. Optional for all requests. If not present,
600  * all flow key bits are exact match bits.
601  * @OVS_FLOW_ATTR_UFID: A value between 1-16 octets specifying a unique
602  * identifier for the flow. Causes the flow to be indexed by this value rather
603  * than the value of the %OVS_FLOW_ATTR_KEY attribute. Optional for all
604  * requests. Present in notifications if the flow was created with this
605  * attribute.
606  * @OVS_FLOW_ATTR_UFID_FLAGS: A 32-bit value of OR'd %OVS_UFID_F_*
607  * flags that provide alternative semantics for flow installation and
608  * retrieval. Optional for all requests.
609  *
610  * These attributes follow the &struct ovs_header within the Generic Netlink
611  * payload for %OVS_FLOW_* commands.
612  */
613 enum ovs_flow_attr {
614 	OVS_FLOW_ATTR_UNSPEC,
615 	OVS_FLOW_ATTR_KEY,       /* Sequence of OVS_KEY_ATTR_* attributes. */
616 	OVS_FLOW_ATTR_ACTIONS,   /* Nested OVS_ACTION_ATTR_* attributes. */
617 	OVS_FLOW_ATTR_STATS,     /* struct ovs_flow_stats. */
618 	OVS_FLOW_ATTR_TCP_FLAGS, /* 8-bit OR'd TCP flags. */
619 	OVS_FLOW_ATTR_USED,      /* u64 msecs last used in monotonic time. */
620 	OVS_FLOW_ATTR_CLEAR,     /* Flag to clear stats, tcp_flags, used. */
621 	OVS_FLOW_ATTR_MASK,      /* Sequence of OVS_KEY_ATTR_* attributes. */
622 	OVS_FLOW_ATTR_PROBE,     /* Flow operation is a feature probe, error
623 				  * logging should be suppressed. */
624 	OVS_FLOW_ATTR_UFID,      /* Variable length unique flow identifier. */
625 	OVS_FLOW_ATTR_UFID_FLAGS,/* u32 of OVS_UFID_F_*. */
626 	OVS_FLOW_ATTR_PAD,
627 	__OVS_FLOW_ATTR_MAX
628 };
629 
630 #define OVS_FLOW_ATTR_MAX (__OVS_FLOW_ATTR_MAX - 1)
631 
632 /**
633  * Omit attributes for notifications.
634  *
635  * If a datapath request contains an %OVS_UFID_F_OMIT_* flag, then the datapath
636  * may omit the corresponding %OVS_FLOW_ATTR_* from the response.
637  */
638 #define OVS_UFID_F_OMIT_KEY      (1 << 0)
639 #define OVS_UFID_F_OMIT_MASK     (1 << 1)
640 #define OVS_UFID_F_OMIT_ACTIONS  (1 << 2)
641 
642 /**
643  * enum ovs_sample_attr - Attributes for %OVS_ACTION_ATTR_SAMPLE action.
644  * @OVS_SAMPLE_ATTR_PROBABILITY: 32-bit fraction of packets to sample with
645  * @OVS_ACTION_ATTR_SAMPLE.  A value of 0 samples no packets, a value of
646  * %UINT32_MAX samples all packets and intermediate values sample intermediate
647  * fractions of packets.
648  * @OVS_SAMPLE_ATTR_ACTIONS: Set of actions to execute in sampling event.
649  * Actions are passed as nested attributes.
650  *
651  * Executes the specified actions with the given probability on a per-packet
652  * basis.
653  */
654 enum ovs_sample_attr {
655 	OVS_SAMPLE_ATTR_UNSPEC,
656 	OVS_SAMPLE_ATTR_PROBABILITY, /* u32 number */
657 	OVS_SAMPLE_ATTR_ACTIONS,     /* Nested OVS_ACTION_ATTR_* attributes. */
658 	__OVS_SAMPLE_ATTR_MAX,
659 
660 #ifdef __KERNEL__
661 	OVS_SAMPLE_ATTR_ARG          /* struct sample_arg  */
662 #endif
663 };
664 
665 #define OVS_SAMPLE_ATTR_MAX (__OVS_SAMPLE_ATTR_MAX - 1)
666 
667 #ifdef __KERNEL__
668 struct sample_arg {
669 	bool exec;                   /* When true, actions in sample will not
670 				      * change flow keys. False otherwise.
671 				      */
672 	u32  probability;            /* Same value as
673 				      * 'OVS_SAMPLE_ATTR_PROBABILITY'.
674 				      */
675 };
676 #endif
677 
678 /**
679  * enum ovs_userspace_attr - Attributes for %OVS_ACTION_ATTR_USERSPACE action.
680  * @OVS_USERSPACE_ATTR_PID: u32 Netlink PID to which the %OVS_PACKET_CMD_ACTION
681  * message should be sent.  Required.
682  * @OVS_USERSPACE_ATTR_USERDATA: If present, its variable-length argument is
683  * copied to the %OVS_PACKET_CMD_ACTION message as %OVS_PACKET_ATTR_USERDATA.
684  * @OVS_USERSPACE_ATTR_EGRESS_TUN_PORT: If present, u32 output port to get
685  * tunnel info.
686  * @OVS_USERSPACE_ATTR_ACTIONS: If present, send actions with upcall.
687  */
688 enum ovs_userspace_attr {
689 	OVS_USERSPACE_ATTR_UNSPEC,
690 	OVS_USERSPACE_ATTR_PID,	      /* u32 Netlink PID to receive upcalls. */
691 	OVS_USERSPACE_ATTR_USERDATA,  /* Optional user-specified cookie. */
692 	OVS_USERSPACE_ATTR_EGRESS_TUN_PORT,  /* Optional, u32 output port
693 					      * to get tunnel info. */
694 	OVS_USERSPACE_ATTR_ACTIONS,   /* Optional flag to get actions. */
695 	__OVS_USERSPACE_ATTR_MAX
696 };
697 
698 #define OVS_USERSPACE_ATTR_MAX (__OVS_USERSPACE_ATTR_MAX - 1)
699 
700 struct ovs_action_trunc {
701 	__u32 max_len; /* Max packet size in bytes. */
702 };
703 
704 /**
705  * struct ovs_action_push_mpls - %OVS_ACTION_ATTR_PUSH_MPLS action argument.
706  * @mpls_lse: MPLS label stack entry to push.
707  * @mpls_ethertype: Ethertype to set in the encapsulating ethernet frame.
708  *
709  * The only values @mpls_ethertype should ever be given are %ETH_P_MPLS_UC and
710  * %ETH_P_MPLS_MC, indicating MPLS unicast or multicast. Other are rejected.
711  */
712 struct ovs_action_push_mpls {
713 	__be32 mpls_lse;
714 	__be16 mpls_ethertype; /* Either %ETH_P_MPLS_UC or %ETH_P_MPLS_MC */
715 };
716 
717 /**
718  * struct ovs_action_add_mpls - %OVS_ACTION_ATTR_ADD_MPLS action
719  * argument.
720  * @mpls_lse: MPLS label stack entry to push.
721  * @mpls_ethertype: Ethertype to set in the encapsulating ethernet frame.
722  * @tun_flags: MPLS tunnel attributes.
723  *
724  * The only values @mpls_ethertype should ever be given are %ETH_P_MPLS_UC and
725  * %ETH_P_MPLS_MC, indicating MPLS unicast or multicast. Other are rejected.
726  */
727 struct ovs_action_add_mpls {
728 	__be32 mpls_lse;
729 	__be16 mpls_ethertype; /* Either %ETH_P_MPLS_UC or %ETH_P_MPLS_MC */
730 	__u16 tun_flags;
731 };
732 
733 #define OVS_MPLS_L3_TUNNEL_FLAG_MASK  (1 << 0) /* Flag to specify the place of
734 						* insertion of MPLS header.
735 						* When false, the MPLS header
736 						* will be inserted at the start
737 						* of the packet.
738 						* When true, the MPLS header
739 						* will be inserted at the start
740 						* of the l3 header.
741 						*/
742 
743 /**
744  * struct ovs_action_push_vlan - %OVS_ACTION_ATTR_PUSH_VLAN action argument.
745  * @vlan_tpid: Tag protocol identifier (TPID) to push.
746  * @vlan_tci: Tag control identifier (TCI) to push.  The CFI bit must be set
747  * (but it will not be set in the 802.1Q header that is pushed).
748  *
749  * The @vlan_tpid value is typically %ETH_P_8021Q or %ETH_P_8021AD.
750  * The only acceptable TPID values are those that the kernel module also parses
751  * as 802.1Q or 802.1AD headers, to prevent %OVS_ACTION_ATTR_PUSH_VLAN followed
752  * by %OVS_ACTION_ATTR_POP_VLAN from having surprising results.
753  */
754 struct ovs_action_push_vlan {
755 	__be16 vlan_tpid;	/* 802.1Q or 802.1ad TPID. */
756 	__be16 vlan_tci;	/* 802.1Q TCI (VLAN ID and priority). */
757 };
758 
759 /* Data path hash algorithm for computing Datapath hash.
760  *
761  * The algorithm type only specifies the fields in a flow
762  * will be used as part of the hash. Each datapath is free
763  * to use its own hash algorithm. The hash value will be
764  * opaque to the user space daemon.
765  */
766 enum ovs_hash_alg {
767 	OVS_HASH_ALG_L4,
768 };
769 
770 /*
771  * struct ovs_action_hash - %OVS_ACTION_ATTR_HASH action argument.
772  * @hash_alg: Algorithm used to compute hash prior to recirculation.
773  * @hash_basis: basis used for computing hash.
774  */
775 struct ovs_action_hash {
776 	__u32  hash_alg;     /* One of ovs_hash_alg. */
777 	__u32  hash_basis;
778 };
779 
780 /**
781  * enum ovs_ct_attr - Attributes for %OVS_ACTION_ATTR_CT action.
782  * @OVS_CT_ATTR_COMMIT: If present, commits the connection to the conntrack
783  * table. This allows future packets for the same connection to be identified
784  * as 'established' or 'related'. The flow key for the current packet will
785  * retain the pre-commit connection state.
786  * @OVS_CT_ATTR_ZONE: u16 connection tracking zone.
787  * @OVS_CT_ATTR_MARK: u32 value followed by u32 mask. For each bit set in the
788  * mask, the corresponding bit in the value is copied to the connection
789  * tracking mark field in the connection.
790  * @OVS_CT_ATTR_LABELS: %OVS_CT_LABELS_LEN value followed by %OVS_CT_LABELS_LEN
791  * mask. For each bit set in the mask, the corresponding bit in the value is
792  * copied to the connection tracking label field in the connection.
793  * @OVS_CT_ATTR_HELPER: variable length string defining conntrack ALG.
794  * @OVS_CT_ATTR_NAT: Nested OVS_NAT_ATTR_* for performing L3 network address
795  * translation (NAT) on the packet.
796  * @OVS_CT_ATTR_FORCE_COMMIT: Like %OVS_CT_ATTR_COMMIT, but instead of doing
797  * nothing if the connection is already committed will check that the current
798  * packet is in conntrack entry's original direction.  If directionality does
799  * not match, will delete the existing conntrack entry and commit a new one.
800  * @OVS_CT_ATTR_EVENTMASK: Mask of bits indicating which conntrack event types
801  * (enum ip_conntrack_events IPCT_*) should be reported.  For any bit set to
802  * zero, the corresponding event type is not generated.  Default behavior
803  * depends on system configuration, but typically all event types are
804  * generated, hence listening on NFNLGRP_CONNTRACK_UPDATE events may get a lot
805  * of events.  Explicitly passing this attribute allows limiting the updates
806  * received to the events of interest.  The bit 1 << IPCT_NEW, 1 <<
807  * IPCT_RELATED, and 1 << IPCT_DESTROY must be set to ones for those events to
808  * be received on NFNLGRP_CONNTRACK_NEW and NFNLGRP_CONNTRACK_DESTROY groups,
809  * respectively.  Remaining bits control the changes for which an event is
810  * delivered on the NFNLGRP_CONNTRACK_UPDATE group.
811  * @OVS_CT_ATTR_TIMEOUT: Variable length string defining conntrack timeout.
812  */
813 enum ovs_ct_attr {
814 	OVS_CT_ATTR_UNSPEC,
815 	OVS_CT_ATTR_COMMIT,     /* No argument, commits connection. */
816 	OVS_CT_ATTR_ZONE,       /* u16 zone id. */
817 	OVS_CT_ATTR_MARK,       /* mark to associate with this connection. */
818 	OVS_CT_ATTR_LABELS,     /* labels to associate with this connection. */
819 	OVS_CT_ATTR_HELPER,     /* netlink helper to assist detection of
820 				   related connections. */
821 	OVS_CT_ATTR_NAT,        /* Nested OVS_NAT_ATTR_* */
822 	OVS_CT_ATTR_FORCE_COMMIT,  /* No argument */
823 	OVS_CT_ATTR_EVENTMASK,  /* u32 mask of IPCT_* events. */
824 	OVS_CT_ATTR_TIMEOUT,	/* Associate timeout with this connection for
825 				 * fine-grain timeout tuning. */
826 	__OVS_CT_ATTR_MAX
827 };
828 
829 #define OVS_CT_ATTR_MAX (__OVS_CT_ATTR_MAX - 1)
830 
831 /**
832  * enum ovs_nat_attr - Attributes for %OVS_CT_ATTR_NAT.
833  *
834  * @OVS_NAT_ATTR_SRC: Flag for Source NAT (mangle source address/port).
835  * @OVS_NAT_ATTR_DST: Flag for Destination NAT (mangle destination
836  * address/port).  Only one of (@OVS_NAT_ATTR_SRC, @OVS_NAT_ATTR_DST) may be
837  * specified.  Effective only for packets for ct_state NEW connections.
838  * Packets of committed connections are mangled by the NAT action according to
839  * the committed NAT type regardless of the flags specified.  As a corollary, a
840  * NAT action without a NAT type flag will only mangle packets of committed
841  * connections.  The following NAT attributes only apply for NEW
842  * (non-committed) connections, and they may be included only when the CT
843  * action has the @OVS_CT_ATTR_COMMIT flag and either @OVS_NAT_ATTR_SRC or
844  * @OVS_NAT_ATTR_DST is also included.
845  * @OVS_NAT_ATTR_IP_MIN: struct in_addr or struct in6_addr
846  * @OVS_NAT_ATTR_IP_MAX: struct in_addr or struct in6_addr
847  * @OVS_NAT_ATTR_PROTO_MIN: u16 L4 protocol specific lower boundary (port)
848  * @OVS_NAT_ATTR_PROTO_MAX: u16 L4 protocol specific upper boundary (port)
849  * @OVS_NAT_ATTR_PERSISTENT: Flag for persistent IP mapping across reboots
850  * @OVS_NAT_ATTR_PROTO_HASH: Flag for pseudo random L4 port mapping (MD5)
851  * @OVS_NAT_ATTR_PROTO_RANDOM: Flag for fully randomized L4 port mapping
852  */
853 enum ovs_nat_attr {
854 	OVS_NAT_ATTR_UNSPEC,
855 	OVS_NAT_ATTR_SRC,
856 	OVS_NAT_ATTR_DST,
857 	OVS_NAT_ATTR_IP_MIN,
858 	OVS_NAT_ATTR_IP_MAX,
859 	OVS_NAT_ATTR_PROTO_MIN,
860 	OVS_NAT_ATTR_PROTO_MAX,
861 	OVS_NAT_ATTR_PERSISTENT,
862 	OVS_NAT_ATTR_PROTO_HASH,
863 	OVS_NAT_ATTR_PROTO_RANDOM,
864 	__OVS_NAT_ATTR_MAX,
865 };
866 
867 #define OVS_NAT_ATTR_MAX (__OVS_NAT_ATTR_MAX - 1)
868 
869 /*
870  * struct ovs_action_push_eth - %OVS_ACTION_ATTR_PUSH_ETH action argument.
871  * @addresses: Source and destination MAC addresses.
872  * @eth_type: Ethernet type
873  */
874 struct ovs_action_push_eth {
875 	struct ovs_key_ethernet addresses;
876 };
877 
878 /*
879  * enum ovs_check_pkt_len_attr - Attributes for %OVS_ACTION_ATTR_CHECK_PKT_LEN.
880  *
881  * @OVS_CHECK_PKT_LEN_ATTR_PKT_LEN: u16 Packet length to check for.
882  * @OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER: Nested OVS_ACTION_ATTR_*
883  * actions to apply if the packer length is greater than the specified
884  * length in the attr - OVS_CHECK_PKT_LEN_ATTR_PKT_LEN.
885  * @OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL - Nested OVS_ACTION_ATTR_*
886  * actions to apply if the packer length is lesser or equal to the specified
887  * length in the attr - OVS_CHECK_PKT_LEN_ATTR_PKT_LEN.
888  */
889 enum ovs_check_pkt_len_attr {
890 	OVS_CHECK_PKT_LEN_ATTR_UNSPEC,
891 	OVS_CHECK_PKT_LEN_ATTR_PKT_LEN,
892 	OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER,
893 	OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL,
894 	__OVS_CHECK_PKT_LEN_ATTR_MAX,
895 
896 #ifdef __KERNEL__
897 	OVS_CHECK_PKT_LEN_ATTR_ARG          /* struct check_pkt_len_arg  */
898 #endif
899 };
900 
901 #define OVS_CHECK_PKT_LEN_ATTR_MAX (__OVS_CHECK_PKT_LEN_ATTR_MAX - 1)
902 
903 #ifdef __KERNEL__
904 struct check_pkt_len_arg {
905 	u16 pkt_len;	/* Same value as OVS_CHECK_PKT_LEN_ATTR_PKT_LEN'. */
906 	bool exec_for_greater;	/* When true, actions in IF_GREATER will
907 				 * not change flow keys. False otherwise.
908 				 */
909 	bool exec_for_lesser_equal; /* When true, actions in IF_LESS_EQUAL
910 				     * will not change flow keys. False
911 				     * otherwise.
912 				     */
913 };
914 #endif
915 
916 /**
917  * enum ovs_action_attr - Action types.
918  *
919  * @OVS_ACTION_ATTR_OUTPUT: Output packet to port.
920  * @OVS_ACTION_ATTR_TRUNC: Output packet to port with truncated packet size.
921  * @OVS_ACTION_ATTR_USERSPACE: Send packet to userspace according to nested
922  * %OVS_USERSPACE_ATTR_* attributes.
923  * @OVS_ACTION_ATTR_SET: Replaces the contents of an existing header.  The
924  * single nested %OVS_KEY_ATTR_* attribute specifies a header to modify and its
925  * value.
926  * @OVS_ACTION_ATTR_SET_MASKED: Replaces the contents of an existing header.  A
927  * nested %OVS_KEY_ATTR_* attribute specifies a header to modify, its value,
928  * and a mask.  For every bit set in the mask, the corresponding bit value
929  * is copied from the value to the packet header field, rest of the bits are
930  * left unchanged.  The non-masked value bits must be passed in as zeroes.
931  * Masking is not supported for the %OVS_KEY_ATTR_TUNNEL attribute.
932  * @OVS_ACTION_ATTR_PUSH_VLAN: Push a new outermost 802.1Q or 802.1ad header
933  * onto the packet.
934  * @OVS_ACTION_ATTR_POP_VLAN: Pop the outermost 802.1Q or 802.1ad header
935  * from the packet.
936  * @OVS_ACTION_ATTR_SAMPLE: Probabilitically executes actions, as specified in
937  * the nested %OVS_SAMPLE_ATTR_* attributes.
938  * @OVS_ACTION_ATTR_PUSH_MPLS: Push a new MPLS label stack entry onto the
939  * top of the packets MPLS label stack.  Set the ethertype of the
940  * encapsulating frame to either %ETH_P_MPLS_UC or %ETH_P_MPLS_MC to
941  * indicate the new packet contents.
942  * @OVS_ACTION_ATTR_POP_MPLS: Pop an MPLS label stack entry off of the
943  * packet's MPLS label stack.  Set the encapsulating frame's ethertype to
944  * indicate the new packet contents. This could potentially still be
945  * %ETH_P_MPLS if the resulting MPLS label stack is not empty.  If there
946  * is no MPLS label stack, as determined by ethertype, no action is taken.
947  * @OVS_ACTION_ATTR_CT: Track the connection. Populate the conntrack-related
948  * entries in the flow key.
949  * @OVS_ACTION_ATTR_PUSH_ETH: Push a new outermost Ethernet header onto the
950  * packet.
951  * @OVS_ACTION_ATTR_POP_ETH: Pop the outermost Ethernet header off the
952  * packet.
953  * @OVS_ACTION_ATTR_CT_CLEAR: Clear conntrack state from the packet.
954  * @OVS_ACTION_ATTR_PUSH_NSH: push NSH header to the packet.
955  * @OVS_ACTION_ATTR_POP_NSH: pop the outermost NSH header off the packet.
956  * @OVS_ACTION_ATTR_METER: Run packet through a meter, which may drop the
957  * packet, or modify the packet (e.g., change the DSCP field).
958  * @OVS_ACTION_ATTR_CLONE: make a copy of the packet and execute a list of
959  * actions without affecting the original packet and key.
960  * @OVS_ACTION_ATTR_CHECK_PKT_LEN: Check the packet length and execute a set
961  * of actions if greater than the specified packet length, else execute
962  * another set of actions.
963  * @OVS_ACTION_ATTR_ADD_MPLS: Push a new MPLS label stack entry at the
964  * start of the packet or at the start of the l3 header depending on the value
965  * of l3 tunnel flag in the tun_flags field of OVS_ACTION_ATTR_ADD_MPLS
966  * argument.
967  *
968  * Only a single header can be set with a single %OVS_ACTION_ATTR_SET.  Not all
969  * fields within a header are modifiable, e.g. the IPv4 protocol and fragment
970  * type may not be changed.
971  *
972  * @OVS_ACTION_ATTR_SET_TO_MASKED: Kernel internal masked set action translated
973  * from the @OVS_ACTION_ATTR_SET.
974  */
975 
976 enum ovs_action_attr {
977 	OVS_ACTION_ATTR_UNSPEC,
978 	OVS_ACTION_ATTR_OUTPUT,	      /* u32 port number. */
979 	OVS_ACTION_ATTR_USERSPACE,    /* Nested OVS_USERSPACE_ATTR_*. */
980 	OVS_ACTION_ATTR_SET,          /* One nested OVS_KEY_ATTR_*. */
981 	OVS_ACTION_ATTR_PUSH_VLAN,    /* struct ovs_action_push_vlan. */
982 	OVS_ACTION_ATTR_POP_VLAN,     /* No argument. */
983 	OVS_ACTION_ATTR_SAMPLE,       /* Nested OVS_SAMPLE_ATTR_*. */
984 	OVS_ACTION_ATTR_RECIRC,       /* u32 recirc_id. */
985 	OVS_ACTION_ATTR_HASH,	      /* struct ovs_action_hash. */
986 	OVS_ACTION_ATTR_PUSH_MPLS,    /* struct ovs_action_push_mpls. */
987 	OVS_ACTION_ATTR_POP_MPLS,     /* __be16 ethertype. */
988 	OVS_ACTION_ATTR_SET_MASKED,   /* One nested OVS_KEY_ATTR_* including
989 				       * data immediately followed by a mask.
990 				       * The data must be zero for the unmasked
991 				       * bits. */
992 	OVS_ACTION_ATTR_CT,           /* Nested OVS_CT_ATTR_* . */
993 	OVS_ACTION_ATTR_TRUNC,        /* u32 struct ovs_action_trunc. */
994 	OVS_ACTION_ATTR_PUSH_ETH,     /* struct ovs_action_push_eth. */
995 	OVS_ACTION_ATTR_POP_ETH,      /* No argument. */
996 	OVS_ACTION_ATTR_CT_CLEAR,     /* No argument. */
997 	OVS_ACTION_ATTR_PUSH_NSH,     /* Nested OVS_NSH_KEY_ATTR_*. */
998 	OVS_ACTION_ATTR_POP_NSH,      /* No argument. */
999 	OVS_ACTION_ATTR_METER,        /* u32 meter ID. */
1000 	OVS_ACTION_ATTR_CLONE,        /* Nested OVS_CLONE_ATTR_*.  */
1001 	OVS_ACTION_ATTR_CHECK_PKT_LEN, /* Nested OVS_CHECK_PKT_LEN_ATTR_*. */
1002 	OVS_ACTION_ATTR_ADD_MPLS,     /* struct ovs_action_add_mpls. */
1003 	OVS_ACTION_ATTR_DEC_TTL,      /* Nested OVS_DEC_TTL_ATTR_*. */
1004 
1005 	__OVS_ACTION_ATTR_MAX,	      /* Nothing past this will be accepted
1006 				       * from userspace. */
1007 
1008 #ifdef __KERNEL__
1009 	OVS_ACTION_ATTR_SET_TO_MASKED, /* Kernel module internal masked
1010 					* set action converted from
1011 					* OVS_ACTION_ATTR_SET. */
1012 #endif
1013 };
1014 
1015 #define OVS_ACTION_ATTR_MAX (__OVS_ACTION_ATTR_MAX - 1)
1016 
1017 /* Meters. */
1018 #define OVS_METER_FAMILY  "ovs_meter"
1019 #define OVS_METER_MCGROUP "ovs_meter"
1020 #define OVS_METER_VERSION 0x1
1021 
1022 enum ovs_meter_cmd {
1023 	OVS_METER_CMD_UNSPEC,
1024 	OVS_METER_CMD_FEATURES,	/* Get features supported by the datapath. */
1025 	OVS_METER_CMD_SET,	/* Add or modify a meter. */
1026 	OVS_METER_CMD_DEL,	/* Delete a meter. */
1027 	OVS_METER_CMD_GET	/* Get meter stats. */
1028 };
1029 
1030 enum ovs_meter_attr {
1031 	OVS_METER_ATTR_UNSPEC,
1032 	OVS_METER_ATTR_ID,	/* u32 meter ID within datapath. */
1033 	OVS_METER_ATTR_KBPS,	/* No argument. If set, units in kilobits
1034 				 * per second. Otherwise, units in
1035 				 * packets per second.
1036 				 */
1037 	OVS_METER_ATTR_STATS,	/* struct ovs_flow_stats for the meter. */
1038 	OVS_METER_ATTR_BANDS,	/* Nested attributes for meter bands. */
1039 	OVS_METER_ATTR_USED,	/* u64 msecs last used in monotonic time. */
1040 	OVS_METER_ATTR_CLEAR,	/* Flag to clear stats, used. */
1041 	OVS_METER_ATTR_MAX_METERS, /* u32 number of meters supported. */
1042 	OVS_METER_ATTR_MAX_BANDS,  /* u32 max number of bands per meter. */
1043 	OVS_METER_ATTR_PAD,
1044 	__OVS_METER_ATTR_MAX
1045 };
1046 
1047 #define OVS_METER_ATTR_MAX (__OVS_METER_ATTR_MAX - 1)
1048 
1049 enum ovs_band_attr {
1050 	OVS_BAND_ATTR_UNSPEC,
1051 	OVS_BAND_ATTR_TYPE,	/* u32 OVS_METER_BAND_TYPE_* constant. */
1052 	OVS_BAND_ATTR_RATE,	/* u32 band rate in meter units (see above). */
1053 	OVS_BAND_ATTR_BURST,	/* u32 burst size in meter units. */
1054 	OVS_BAND_ATTR_STATS,	/* struct ovs_flow_stats for the band. */
1055 	__OVS_BAND_ATTR_MAX
1056 };
1057 
1058 #define OVS_BAND_ATTR_MAX (__OVS_BAND_ATTR_MAX - 1)
1059 
1060 enum ovs_meter_band_type {
1061 	OVS_METER_BAND_TYPE_UNSPEC,
1062 	OVS_METER_BAND_TYPE_DROP,   /* Drop exceeding packets. */
1063 	__OVS_METER_BAND_TYPE_MAX
1064 };
1065 
1066 #define OVS_METER_BAND_TYPE_MAX (__OVS_METER_BAND_TYPE_MAX - 1)
1067 
1068 /* Conntrack limit */
1069 #define OVS_CT_LIMIT_FAMILY  "ovs_ct_limit"
1070 #define OVS_CT_LIMIT_MCGROUP "ovs_ct_limit"
1071 #define OVS_CT_LIMIT_VERSION 0x1
1072 
1073 enum ovs_ct_limit_cmd {
1074 	OVS_CT_LIMIT_CMD_UNSPEC,
1075 	OVS_CT_LIMIT_CMD_SET,		/* Add or modify ct limit. */
1076 	OVS_CT_LIMIT_CMD_DEL,		/* Delete ct limit. */
1077 	OVS_CT_LIMIT_CMD_GET		/* Get ct limit. */
1078 };
1079 
1080 enum ovs_ct_limit_attr {
1081 	OVS_CT_LIMIT_ATTR_UNSPEC,
1082 	OVS_CT_LIMIT_ATTR_ZONE_LIMIT,	/* Nested struct ovs_zone_limit. */
1083 	__OVS_CT_LIMIT_ATTR_MAX
1084 };
1085 
1086 #define OVS_CT_LIMIT_ATTR_MAX (__OVS_CT_LIMIT_ATTR_MAX - 1)
1087 
1088 #define OVS_ZONE_LIMIT_DEFAULT_ZONE -1
1089 
1090 struct ovs_zone_limit {
1091 	int zone_id;
1092 	__u32 limit;
1093 	__u32 count;
1094 };
1095 
1096 enum ovs_dec_ttl_attr {
1097 	OVS_DEC_TTL_ATTR_UNSPEC,
1098 	OVS_DEC_TTL_ATTR_ACTION,	/* Nested struct nlattr */
1099 	__OVS_DEC_TTL_ATTR_MAX
1100 };
1101 
1102 #define OVS_DEC_TTL_ATTR_MAX (__OVS_DEC_TTL_ATTR_MAX - 1)
1103 
1104 #endif /* _LINUX_OPENVSWITCH_H */
1105