4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
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 version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
33 #ifndef __UAPI_LNET_TYPES_H__
34 #define __UAPI_LNET_TYPES_H__
39 #include <linux/types.h>
40 /** \addtogroup lnet_addr
43 #define LNET_VERSION "0.7.0"
45 /** Portal reserved for LNet's own use.
46 * \see lustre/include/lustre/lustre_idl.h for Lustre portal assignments.
48 #define LNET_RESERVED_PORTAL 0
51 * Address of an end-point in an LNet network.
53 * A node can have multiple end-points and hence multiple addresses.
54 * An LNet network can be a simple network (e.g. tcp0) or a network of
55 * LNet networks connected by LNet routers. Therefore an end-point address
56 * has two parts: network ID, and address within a network.
58 * \see LNET_NIDNET, LNET_NIDADDR, and LNET_MKNID.
60 typedef __u64 lnet_nid_t;
63 * ID of a process in a node. Shortened as PID to distinguish from
64 * lnet_process_id, the global process ID.
66 typedef __u32 lnet_pid_t;
68 /** wildcard NID that matches any end-point address */
69 #define LNET_NID_ANY ((lnet_nid_t) -1)
70 /** wildcard PID that matches any lnet_pid_t */
71 #define LNET_PID_ANY ((lnet_pid_t) -1)
73 #define LNET_PID_RESERVED 0xf0000000 /* reserved bits in PID */
74 #define LNET_PID_USERFLAG 0x80000000 /* set in userspace peers */
75 #define LNET_PID_LUSTRE 12345
77 /* how an LNET NID encodes net:address */
78 /** extract the address part of an lnet_nid_t */
80 static inline __u32 LNET_NIDADDR(lnet_nid_t nid)
82 return nid & 0xffffffff;
85 static inline __u32 LNET_NIDNET(lnet_nid_t nid)
87 return (nid >> 32) & 0xffffffff;
90 static inline lnet_nid_t LNET_MKNID(__u32 net, __u32 addr)
92 return (((__u64)net) << 32) | addr;
95 static inline __u32 LNET_NETNUM(__u32 net)
100 static inline __u32 LNET_NETTYP(__u32 net)
102 return (net >> 16) & 0xffff;
105 static inline __u32 LNET_MKNET(__u32 type, __u32 num)
107 return (type << 16) | num;
110 /** The lolnd NID (i.e. myself) */
111 #define LNET_NID_LO_0 LNET_MKNID(LNET_MKNET(LOLND, 0), 0)
113 #define LNET_NET_ANY LNET_NIDNET(LNET_NID_ANY)
115 #define WIRE_ATTR __attribute__((packed))
117 /* Packed version of struct lnet_process_id to transfer via network */
118 struct lnet_process_id_packed {
120 lnet_pid_t pid; /* node id / process id */
123 /* The wire handle's interface cookie only matches one network interface in
124 * one epoch (i.e. new cookie when the interface restarts or the node
125 * reboots). The object cookie only matches one object on that interface
126 * during that object's lifetime (i.e. no cookie re-use). */
127 struct lnet_handle_wire {
128 __u64 wh_interface_cookie;
129 __u64 wh_object_cookie;
140 /* The variant fields of the portals message header are aligned on an 8
141 * byte boundary in the message header. Note that all types used in these
142 * wire structs MUST be fixed size and the smaller types are placed at the
145 struct lnet_handle_wire dst_wmd;
151 struct lnet_handle_wire ack_wmd;
159 struct lnet_handle_wire return_wmd;
167 struct lnet_handle_wire dst_wmd;
180 __u32 type; /* enum lnet_msg_type */
181 __u32 payload_length; /* payload data to follow */
182 /*<------__u64 aligned------->*/
187 struct lnet_reply reply;
188 struct lnet_hello hello;
192 /* A HELLO message contains a magic number and protocol version
193 * code in the header's dest_nid, the peer's NID in the src_nid, and
194 * LNET_MSG_HELLO in the type field. All other common fields are zero
195 * (including payload_size; i.e. no payload).
196 * This is for use by byte-stream LNDs (e.g. TCP/IP) to check the peer is
197 * running the same protocol and to find out its NID. These LNDs should
198 * exchange HELLO messages when a connection is first established. Individual
199 * LNDs can put whatever else they fancy in lnet_hdr::msg.
201 struct lnet_magicversion {
202 __u32 magic; /* LNET_PROTO_TCP_MAGIC */
203 __u16 version_major; /* increment on incompatible change */
204 __u16 version_minor; /* increment on compatible change */
207 /* PROTO MAGIC for LNDs */
208 #define LNET_PROTO_IB_MAGIC 0x0be91b91
209 #define LNET_PROTO_GNI_MAGIC 0xb00fbabe /* ask Kim */
210 #define LNET_PROTO_TCP_MAGIC 0xeebc0ded
211 #define LNET_PROTO_ACCEPTOR_MAGIC 0xacce7100
212 #define LNET_PROTO_PING_MAGIC 0x70696E67 /* 'ping' */
214 /* Placeholder for a future "unified" protocol across all LNDs */
215 /* Current LNDs that receive a request with this magic will respond
216 * with a "stub" reply using their current protocol */
217 #define LNET_PROTO_MAGIC 0x45726963 /* ! */
219 #define LNET_PROTO_TCP_VERSION_MAJOR 1
220 #define LNET_PROTO_TCP_VERSION_MINOR 0
222 /* Acceptor connection request */
223 struct lnet_acceptor_connreq {
224 __u32 acr_magic; /* PTL_ACCEPTOR_PROTO_MAGIC */
225 __u32 acr_version; /* protocol version */
226 __u64 acr_nid; /* target NID */
229 #define LNET_PROTO_ACCEPTOR_VERSION 1
231 struct lnet_counters_common {
232 __u32 lcc_msgs_alloc;
235 __u32 lcc_send_count;
236 __u32 lcc_recv_count;
237 __u32 lcc_route_count;
238 __u32 lcc_drop_count;
239 __u64 lcc_send_length;
240 __u64 lcc_recv_length;
241 __u64 lcc_route_length;
242 __u64 lcc_drop_length;
245 struct lnet_counters_health {
247 __u32 lch_resend_count;
248 __u32 lch_response_timeout_count;
249 __u32 lch_local_interrupt_count;
250 __u32 lch_local_dropped_count;
251 __u32 lch_local_aborted_count;
252 __u32 lch_local_no_route_count;
253 __u32 lch_local_timeout_count;
254 __u32 lch_local_error_count;
255 __u32 lch_remote_dropped_count;
256 __u32 lch_remote_error_count;
257 __u32 lch_remote_timeout_count;
258 __u32 lch_network_timeout_count;
261 struct lnet_counters {
262 struct lnet_counters_common lct_common;
263 struct lnet_counters_health lct_health;
266 #define LNET_NI_STATUS_UP 0x15aac0de
267 #define LNET_NI_STATUS_DOWN 0xdeadface
268 #define LNET_NI_STATUS_INVALID 0x00000000
270 struct lnet_ni_status {
277 * NB: value of these features equal to LNET_PROTO_PING_VERSION_x
278 * of old LNet, so there shouldn't be any compatibility issue
280 #define LNET_PING_FEAT_INVAL (0) /* no feature */
281 #define LNET_PING_FEAT_BASE (1 << 0) /* just a ping */
282 #define LNET_PING_FEAT_NI_STATUS (1 << 1) /* return NI status */
283 #define LNET_PING_FEAT_RTE_DISABLED (1 << 2) /* Routing enabled */
284 #define LNET_PING_FEAT_MULTI_RAIL (1 << 3) /* Multi-Rail aware */
285 #define LNET_PING_FEAT_DISCOVERY (1 << 4) /* Supports Discovery */
288 * All ping feature bits fit to hit the wire.
289 * In lnet_assert_wire_constants() this is compared against its open-coded
290 * value, and in lnet_ping_target_update() it is used to verify that no
291 * unknown bits have been set.
292 * New feature bits can be added, just be aware that this does change the
293 * over-the-wire protocol.
295 #define LNET_PING_FEAT_BITS (LNET_PING_FEAT_BASE | \
296 LNET_PING_FEAT_NI_STATUS | \
297 LNET_PING_FEAT_RTE_DISABLED | \
298 LNET_PING_FEAT_MULTI_RAIL | \
299 LNET_PING_FEAT_DISCOVERY)
301 struct lnet_ping_info {
306 struct lnet_ni_status pi_ni[0];
309 #define LNET_PING_INFO_SIZE(NNIDS) \
310 offsetof(struct lnet_ping_info, pi_ni[NNIDS])
311 #define LNET_PING_INFO_LONI(PINFO) ((PINFO)->pi_ni[0].ns_nid)
312 #define LNET_PING_INFO_SEQNO(PINFO) ((PINFO)->pi_ni[0].ns_status)
315 * This is a hard-coded limit on the number of interfaces supported by
316 * the interface bonding implemented by the ksocknal LND. It must be
317 * defined here because it is used in LNet data structures that are
318 * common to all LNDs.
320 #define LNET_INTERFACES_NUM 16
322 /* The minimum number of interfaces per node supported by LNet. */
323 #define LNET_INTERFACES_MIN 16
324 /* The default - arbitrary - value of the lnet_max_interfaces tunable. */
325 #define LNET_INTERFACES_MAX_DEFAULT 200
328 * Objects maintained by the LNet are accessed through handles. Handle types
329 * have names of the form lnet_handle_xx, where xx is one of the two letter
330 * object type codes ('md' for memory descriptor, and
331 * 'me' for match entry). Each type of object is given a unique handle type
332 * to enhance type checking.
334 #define LNET_WIRE_HANDLE_COOKIE_NONE (-1)
336 struct lnet_handle_md {
341 * Invalidate md handle \a h.
343 static inline void LNetInvalidateMDHandle(struct lnet_handle_md *h)
345 h->cookie = LNET_WIRE_HANDLE_COOKIE_NONE;
349 * Check whether handler \a h is invalid.
351 * \return 1 if handle is invalid, 0 if valid.
353 static inline int LNetMDHandleIsInvalid(struct lnet_handle_md h)
355 return (LNET_WIRE_HANDLE_COOKIE_NONE == h.cookie);
361 struct lnet_process_id {
369 /** \addtogroup lnet_me
373 * Specifies whether the match entry or memory descriptor should be unlinked
374 * automatically (LNET_UNLINK) or not (LNET_RETAIN).
382 * Values of the type enum lnet_ins_pos are used to control where a new match
383 * entry is inserted. The value LNET_INS_BEFORE is used to insert the new
384 * entry before the current entry or before the head of the list. The value
385 * LNET_INS_AFTER is used to insert the new entry after the current entry
386 * or after the last item in the list.
389 /** insert ME before current position or head of the list */
391 /** insert ME after current position or tail of the list */
393 /** attach ME at tail of local CPU partition ME list */
399 /** \addtogroup lnet_md
403 * Event queue handler function type.
405 * The EQ handler runs for each event that is deposited into the EQ. The
406 * handler is supplied with a pointer to the event that triggered the
407 * handler invocation.
409 * The handler must not block, must be reentrant, and must not call any LNet
410 * API functions. It should return as quickly as possible.
413 typedef void (*lnet_handler_t)(struct lnet_event *event);
416 * Defines the visible parts of a memory descriptor. Values of this type
417 * are used to initialize memory descriptors.
421 * Specify the memory region associated with the memory descriptor.
422 * If the options field has:
423 * - LNET_MD_KIOV bit set: The start field points to the starting
424 * address of an array of struct bio_vec and the length field specifies
425 * the number of entries in the array. The length can't be bigger
426 * than LNET_MAX_IOV. The struct bio_vec is used to describe page-based
427 * fragments that are not necessarily mapped in virtal memory.
428 * - Otherwise: The memory region is contiguous. The start field
429 * specifies the starting address for the memory region and the
430 * length field specifies its length.
432 * When the memory region is fragmented, all fragments but the first
433 * one must start on page boundary, and all but the last must end on
439 * Specifies the maximum number of operations that can be performed
440 * on the memory descriptor. An operation is any action that could
441 * possibly generate an event. In the usual case, the threshold value
442 * is decremented for each operation on the MD. When the threshold
443 * drops to zero, the MD becomes inactive and does not respond to
444 * operations. A threshold value of LNET_MD_THRESH_INF indicates that
445 * there is no bound on the number of operations that may be applied
450 * Specifies the largest incoming request that the memory descriptor
451 * should respond to. When the unused portion of a MD (length -
452 * local offset) falls below this value, the MD becomes inactive and
453 * does not respond to further operations. This value is only used
454 * if the LNET_MD_MAX_SIZE option is set.
458 * Specifies the behavior of the memory descriptor. A bitwise OR
459 * of the following values can be used:
460 * - LNET_MD_OP_PUT: The LNet PUT operation is allowed on this MD.
461 * - LNET_MD_OP_GET: The LNet GET operation is allowed on this MD.
462 * - LNET_MD_MANAGE_REMOTE: The offset used in accessing the memory
463 * region is provided by the incoming request. By default, the
464 * offset is maintained locally. When maintained locally, the
465 * offset is incremented by the length of the request so that
466 * the next operation (PUT or GET) will access the next part of
467 * the memory region. Note that only one offset variable exists
468 * per memory descriptor. If both PUT and GET operations are
469 * performed on a memory descriptor, the offset is updated each time.
470 * - LNET_MD_TRUNCATE: The length provided in the incoming request can
471 * be reduced to match the memory available in the region (determined
472 * by subtracting the offset from the length of the memory region).
473 * By default, if the length in the incoming operation is greater
474 * than the amount of memory available, the operation is rejected.
475 * - LNET_MD_ACK_DISABLE: An acknowledgment should not be sent for
476 * incoming PUT operations, even if requested. By default,
477 * acknowledgments are sent for PUT operations that request an
478 * acknowledgment. Acknowledgments are never sent for GET operations.
479 * The data sent in the REPLY serves as an implicit acknowledgment.
480 * - LNET_MD_KIOV: The start and length fields specify an array of
482 * - LNET_MD_MAX_SIZE: The max_size field is valid.
483 * - LNET_MD_BULK_HANDLE: The bulk_handle field is valid.
484 * - LNET_MD_TRACK_RESPONSE: Enable response tracking on this MD
485 * regardless of the value of the lnet_response_tracking param.
486 * - LNET_MD_NO_TRACK_RESPONSE: Disable response tracking on this MD
487 * regardless of the value of the lnet_response_tracking param.
490 * - LNET_MD_KIOV allows for a scatter/gather capability for memory
492 * - When LNET_MD_MAX_SIZE is set, the total length of the memory
493 * region (i.e. sum of all fragment lengths) must not be less than
496 unsigned int options;
498 * A user-specified value that is associated with the memory
499 * descriptor. The value does not need to be a pointer, but must fit
500 * in the space used by a pointer. This value is recorded in events
501 * associated with operations on this MD.
505 * The event handler used to log the operations performed on
506 * the memory region. If this argument is NULL operations
507 * performed on this memory descriptor are not logged.
509 lnet_handler_t handler;
511 * The bulk MD handle which was registered to describe the buffers
512 * either to be used to transfer data to the peer or receive data
513 * from the peer. This allows LNet to properly determine the NUMA
514 * node on which the memory was allocated and use that to select the
515 * nearest local network interface. This value is only used
516 * if the LNET_MD_BULK_HANDLE option is set.
518 struct lnet_handle_md bulk_handle;
521 /* Max Transfer Unit (minimum supported everywhere).
522 * CAVEAT EMPTOR, with multinet (i.e. routers forwarding between networks)
523 * these limits are system wide and not interface-local. */
524 #define LNET_MTU_BITS 20
525 #define LNET_MTU (1 << LNET_MTU_BITS)
528 * Options for the MD structure. See struct lnet_md::options.
530 #define LNET_MD_OP_PUT (1 << 0)
531 /** See struct lnet_md::options. */
532 #define LNET_MD_OP_GET (1 << 1)
533 /** See struct lnet_md::options. */
534 #define LNET_MD_MANAGE_REMOTE (1 << 2)
535 /* unused (1 << 3) */
536 /** See struct lnet_md::options. */
537 #define LNET_MD_TRUNCATE (1 << 4)
538 /** See struct lnet_md::options. */
539 #define LNET_MD_ACK_DISABLE (1 << 5)
540 /** See struct lnet_md::options. */
541 /* deprecated #define LNET_MD_IOVEC (1 << 6) */
542 /** See struct lnet_md::options. */
543 #define LNET_MD_MAX_SIZE (1 << 7)
544 /** See struct lnet_md::options. */
545 #define LNET_MD_KIOV (1 << 8)
546 /** See struct lnet_md::options. */
547 #define LNET_MD_BULK_HANDLE (1 << 9)
548 /** See struct lnet_md::options. */
549 #define LNET_MD_TRACK_RESPONSE (1 << 10)
550 /** See struct lnet_md::options. */
551 #define LNET_MD_NO_TRACK_RESPONSE (1 << 11)
553 /* For compatibility with Cray Portals */
554 #define LNET_MD_PHYS 0
556 /** Infinite threshold on MD operations. See struct lnet_md::threshold */
557 #define LNET_MD_THRESH_INF (-1)
561 /** \addtogroup lnet_eq
565 * Six types of events can be logged in an event queue.
567 enum lnet_event_kind {
568 /** An incoming GET operation has completed on the MD. */
571 * An incoming PUT operation has completed on the MD. The
572 * underlying layers will not alter the memory (on behalf of this
573 * operation) once this event has been logged.
577 * A REPLY operation has completed. This event is logged after the
578 * data (if any) from the REPLY has been written into the MD.
581 /** An acknowledgment has been received. */
584 * An outgoing send (PUT or GET) operation has completed. This event
585 * is logged after the entire buffer has been sent and it is safe for
586 * the caller to reuse the buffer.
589 * - The LNET_EVENT_SEND doesn't guarantee message delivery. It can
590 * happen even when the message has not yet been put out on wire.
591 * - It's unsafe to assume that in an outgoing GET operation
592 * the LNET_EVENT_SEND event would happen before the
593 * LNET_EVENT_REPLY event. The same holds for LNET_EVENT_SEND and
594 * LNET_EVENT_ACK events in an outgoing PUT operation.
598 * A MD has been unlinked. Note that LNetMDUnlink() does not
599 * necessarily trigger an LNET_EVENT_UNLINK event.
605 #define LNET_SEQ_GT(a, b) (((signed long)((a) - (b))) > 0)
608 * Information about an event on a MD.
611 /** The identifier (nid, pid) of the target. */
612 struct lnet_process_id target;
613 /** The identifier (nid, pid) of the initiator. */
614 struct lnet_process_id initiator;
615 /** The source NID on the initiator. */
616 struct lnet_process_id source;
618 * The NID of the immediate sender. If the request has been forwarded
619 * by routers, this is the NID of the last hop; otherwise it's the
620 * same as the source.
623 /** Indicates the type of the event. */
624 enum lnet_event_kind type;
625 /** The portal table index specified in the request */
626 unsigned int pt_index;
627 /** A copy of the match bits specified in the request. */
629 /** The length (in bytes) specified in the request. */
630 unsigned int rlength;
632 * The length (in bytes) of the data that was manipulated by the
633 * operation. For truncated operations, the manipulated length will be
634 * the number of bytes specified by the MD (possibly with an offset,
635 * see struct lnet_md). For all other operations, the manipulated length
636 * will be the length of the requested operation, i.e. rlength.
638 unsigned int mlength;
640 * The handle to the MD associated with the event. The handle may be
641 * invalid if the MD has been unlinked.
643 struct lnet_handle_md md_handle;
645 * A snapshot of relevant state of the MD immediately after the event
646 * has been processed.
650 unsigned int md_options;
652 * 64 bits of out-of-band user data. Only valid for LNET_EVENT_PUT.
657 * The message type, to ensure a handler for LNET_EVENT_SEND can
658 * distinguish between LNET_MSG_GET and LNET_MSG_PUT.
662 * Indicates the completion status of the operation. It's 0 for
663 * successful operations, otherwise it's an error code.
667 * Indicates whether the MD has been unlinked. Note that:
668 * - An event with unlinked set is the last event on the MD.
669 * - This field is also set for an explicit LNET_EVENT_UNLINK event.
674 * The displacement (in bytes) into the memory region that the
675 * operation used. The offset can be determined by the operation for
676 * a remote managed MD or by the local MD.
677 * \see struct lnet_md::options
681 * The sequence number for this event. Sequence numbers are unique
684 volatile unsigned long sequence;
687 /** \addtogroup lnet_data
691 * Specify whether an acknowledgment should be sent by target when the PUT
692 * operation completes (i.e., when the data has been written to a MD of the
695 * \see struct lnet_md::options for the discussion on LNET_MD_ACK_DISABLE
696 * by which acknowledgments can be disabled for a MD.
699 /** Request an acknowledgment */
701 /** Request that no acknowledgment should be generated. */