4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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7 * it under the terms of the GNU General Public License version 2 only,
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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 WIRE_ATTR __attribute__((packed))
115 /* Packed version of struct lnet_process_id to transfer via network */
116 struct lnet_process_id_packed {
118 lnet_pid_t pid; /* node id / process id */
121 /* The wire handle's interface cookie only matches one network interface in
122 * one epoch (i.e. new cookie when the interface restarts or the node
123 * reboots). The object cookie only matches one object on that interface
124 * during that object's lifetime (i.e. no cookie re-use). */
125 struct lnet_handle_wire {
126 __u64 wh_interface_cookie;
127 __u64 wh_object_cookie;
138 /* The variant fields of the portals message header are aligned on an 8
139 * byte boundary in the message header. Note that all types used in these
140 * wire structs MUST be fixed size and the smaller types are placed at the
143 struct lnet_handle_wire dst_wmd;
149 struct lnet_handle_wire ack_wmd;
157 struct lnet_handle_wire return_wmd;
165 struct lnet_handle_wire dst_wmd;
178 __u32 type; /* enum lnet_msg_type */
179 __u32 payload_length; /* payload data to follow */
180 /*<------__u64 aligned------->*/
185 struct lnet_reply reply;
186 struct lnet_hello hello;
190 /* A HELLO message contains a magic number and protocol version
191 * code in the header's dest_nid, the peer's NID in the src_nid, and
192 * LNET_MSG_HELLO in the type field. All other common fields are zero
193 * (including payload_size; i.e. no payload).
194 * This is for use by byte-stream LNDs (e.g. TCP/IP) to check the peer is
195 * running the same protocol and to find out its NID. These LNDs should
196 * exchange HELLO messages when a connection is first established. Individual
197 * LNDs can put whatever else they fancy in lnet_hdr::msg.
199 struct lnet_magicversion {
200 __u32 magic; /* LNET_PROTO_TCP_MAGIC */
201 __u16 version_major; /* increment on incompatible change */
202 __u16 version_minor; /* increment on compatible change */
205 /* PROTO MAGIC for LNDs */
206 #define LNET_PROTO_IB_MAGIC 0x0be91b91
207 #define LNET_PROTO_GNI_MAGIC 0xb00fbabe /* ask Kim */
208 #define LNET_PROTO_TCP_MAGIC 0xeebc0ded
209 #define LNET_PROTO_ACCEPTOR_MAGIC 0xacce7100
210 #define LNET_PROTO_PING_MAGIC 0x70696E67 /* 'ping' */
212 /* Placeholder for a future "unified" protocol across all LNDs */
213 /* Current LNDs that receive a request with this magic will respond
214 * with a "stub" reply using their current protocol */
215 #define LNET_PROTO_MAGIC 0x45726963 /* ! */
217 #define LNET_PROTO_TCP_VERSION_MAJOR 1
218 #define LNET_PROTO_TCP_VERSION_MINOR 0
220 /* Acceptor connection request */
221 struct lnet_acceptor_connreq {
222 __u32 acr_magic; /* PTL_ACCEPTOR_PROTO_MAGIC */
223 __u32 acr_version; /* protocol version */
224 __u64 acr_nid; /* target NID */
227 #define LNET_PROTO_ACCEPTOR_VERSION 1
229 struct lnet_counters_common {
230 __u32 lcc_msgs_alloc;
233 __u32 lcc_send_count;
234 __u32 lcc_recv_count;
235 __u32 lcc_route_count;
236 __u32 lcc_drop_count;
237 __u64 lcc_send_length;
238 __u64 lcc_recv_length;
239 __u64 lcc_route_length;
240 __u64 lcc_drop_length;
243 struct lnet_counters_health {
245 __u32 lch_resend_count;
246 __u32 lch_response_timeout_count;
247 __u32 lch_local_interrupt_count;
248 __u32 lch_local_dropped_count;
249 __u32 lch_local_aborted_count;
250 __u32 lch_local_no_route_count;
251 __u32 lch_local_timeout_count;
252 __u32 lch_local_error_count;
253 __u32 lch_remote_dropped_count;
254 __u32 lch_remote_error_count;
255 __u32 lch_remote_timeout_count;
256 __u32 lch_network_timeout_count;
259 struct lnet_counters {
260 struct lnet_counters_common lct_common;
261 struct lnet_counters_health lct_health;
264 #define LNET_NI_STATUS_UP 0x15aac0de
265 #define LNET_NI_STATUS_DOWN 0xdeadface
266 #define LNET_NI_STATUS_INVALID 0x00000000
268 struct lnet_ni_status {
275 * NB: value of these features equal to LNET_PROTO_PING_VERSION_x
276 * of old LNet, so there shouldn't be any compatibility issue
278 #define LNET_PING_FEAT_INVAL (0) /* no feature */
279 #define LNET_PING_FEAT_BASE (1 << 0) /* just a ping */
280 #define LNET_PING_FEAT_NI_STATUS (1 << 1) /* return NI status */
281 #define LNET_PING_FEAT_RTE_DISABLED (1 << 2) /* Routing enabled */
282 #define LNET_PING_FEAT_MULTI_RAIL (1 << 3) /* Multi-Rail aware */
283 #define LNET_PING_FEAT_DISCOVERY (1 << 4) /* Supports Discovery */
286 * All ping feature bits fit to hit the wire.
287 * In lnet_assert_wire_constants() this is compared against its open-coded
288 * value, and in lnet_ping_target_update() it is used to verify that no
289 * unknown bits have been set.
290 * New feature bits can be added, just be aware that this does change the
291 * over-the-wire protocol.
293 #define LNET_PING_FEAT_BITS (LNET_PING_FEAT_BASE | \
294 LNET_PING_FEAT_NI_STATUS | \
295 LNET_PING_FEAT_RTE_DISABLED | \
296 LNET_PING_FEAT_MULTI_RAIL | \
297 LNET_PING_FEAT_DISCOVERY)
299 struct lnet_ping_info {
304 struct lnet_ni_status pi_ni[0];
307 #define LNET_PING_INFO_SIZE(NNIDS) \
308 offsetof(struct lnet_ping_info, pi_ni[NNIDS])
309 #define LNET_PING_INFO_LONI(PINFO) ((PINFO)->pi_ni[0].ns_nid)
310 #define LNET_PING_INFO_SEQNO(PINFO) ((PINFO)->pi_ni[0].ns_status)
313 * This is a hard-coded limit on the number of interfaces supported by
314 * the interface bonding implemented by the ksocknal LND. It must be
315 * defined here because it is used in LNet data structures that are
316 * common to all LNDs.
318 #define LNET_INTERFACES_NUM 16
320 /* The minimum number of interfaces per node supported by LNet. */
321 #define LNET_INTERFACES_MIN 16
322 /* The default - arbitrary - value of the lnet_max_interfaces tunable. */
323 #define LNET_INTERFACES_MAX_DEFAULT 200
326 * Objects maintained by the LNet are accessed through handles. Handle types
327 * have names of the form lnet_handle_xx, where xx is one of the two letter
328 * object type codes ('md' for memory descriptor, and
329 * 'me' for match entry). Each type of object is given a unique handle type
330 * to enhance type checking.
332 #define LNET_WIRE_HANDLE_COOKIE_NONE (-1)
334 struct lnet_handle_md {
339 * Invalidate md handle \a h.
341 static inline void LNetInvalidateMDHandle(struct lnet_handle_md *h)
343 h->cookie = LNET_WIRE_HANDLE_COOKIE_NONE;
347 * Check whether handler \a h is invalid.
349 * \return 1 if handle is invalid, 0 if valid.
351 static inline int LNetMDHandleIsInvalid(struct lnet_handle_md h)
353 return (LNET_WIRE_HANDLE_COOKIE_NONE == h.cookie);
359 struct lnet_process_id {
367 /** \addtogroup lnet_me
371 * Specifies whether the match entry or memory descriptor should be unlinked
372 * automatically (LNET_UNLINK) or not (LNET_RETAIN).
380 * Values of the type enum lnet_ins_pos are used to control where a new match
381 * entry is inserted. The value LNET_INS_BEFORE is used to insert the new
382 * entry before the current entry or before the head of the list. The value
383 * LNET_INS_AFTER is used to insert the new entry after the current entry
384 * or after the last item in the list.
387 /** insert ME before current position or head of the list */
389 /** insert ME after current position or tail of the list */
391 /** attach ME at tail of local CPU partition ME list */
397 /** \addtogroup lnet_md
401 * Event queue handler function type.
403 * The EQ handler runs for each event that is deposited into the EQ. The
404 * handler is supplied with a pointer to the event that triggered the
405 * handler invocation.
407 * The handler must not block, must be reentrant, and must not call any LNet
408 * API functions. It should return as quickly as possible.
411 typedef void (*lnet_handler_t)(struct lnet_event *event);
414 * Defines the visible parts of a memory descriptor. Values of this type
415 * are used to initialize memory descriptors.
419 * Specify the memory region associated with the memory descriptor.
420 * If the options field has:
421 * - LNET_MD_KIOV bit set: The start field points to the starting
422 * address of an array of struct bio_vec and the length field specifies
423 * the number of entries in the array. The length can't be bigger
424 * than LNET_MAX_IOV. The struct bio_vec is used to describe page-based
425 * fragments that are not necessarily mapped in virtal memory.
426 * - Otherwise: The memory region is contiguous. The start field
427 * specifies the starting address for the memory region and the
428 * length field specifies its length.
430 * When the memory region is fragmented, all fragments but the first
431 * one must start on page boundary, and all but the last must end on
437 * Specifies the maximum number of operations that can be performed
438 * on the memory descriptor. An operation is any action that could
439 * possibly generate an event. In the usual case, the threshold value
440 * is decremented for each operation on the MD. When the threshold
441 * drops to zero, the MD becomes inactive and does not respond to
442 * operations. A threshold value of LNET_MD_THRESH_INF indicates that
443 * there is no bound on the number of operations that may be applied
448 * Specifies the largest incoming request that the memory descriptor
449 * should respond to. When the unused portion of a MD (length -
450 * local offset) falls below this value, the MD becomes inactive and
451 * does not respond to further operations. This value is only used
452 * if the LNET_MD_MAX_SIZE option is set.
456 * Specifies the behavior of the memory descriptor. A bitwise OR
457 * of the following values can be used:
458 * - LNET_MD_OP_PUT: The LNet PUT operation is allowed on this MD.
459 * - LNET_MD_OP_GET: The LNet GET operation is allowed on this MD.
460 * - LNET_MD_MANAGE_REMOTE: The offset used in accessing the memory
461 * region is provided by the incoming request. By default, the
462 * offset is maintained locally. When maintained locally, the
463 * offset is incremented by the length of the request so that
464 * the next operation (PUT or GET) will access the next part of
465 * the memory region. Note that only one offset variable exists
466 * per memory descriptor. If both PUT and GET operations are
467 * performed on a memory descriptor, the offset is updated each time.
468 * - LNET_MD_TRUNCATE: The length provided in the incoming request can
469 * be reduced to match the memory available in the region (determined
470 * by subtracting the offset from the length of the memory region).
471 * By default, if the length in the incoming operation is greater
472 * than the amount of memory available, the operation is rejected.
473 * - LNET_MD_ACK_DISABLE: An acknowledgment should not be sent for
474 * incoming PUT operations, even if requested. By default,
475 * acknowledgments are sent for PUT operations that request an
476 * acknowledgment. Acknowledgments are never sent for GET operations.
477 * The data sent in the REPLY serves as an implicit acknowledgment.
478 * - LNET_MD_KIOV: The start and length fields specify an array of
480 * - LNET_MD_MAX_SIZE: The max_size field is valid.
481 * - LNET_MD_BULK_HANDLE: The bulk_handle field is valid.
484 * - LNET_MD_KIOV allows for a scatter/gather capability for memory
486 * - When LNET_MD_MAX_SIZE is set, the total length of the memory
487 * region (i.e. sum of all fragment lengths) must not be less than
490 unsigned int options;
492 * A user-specified value that is associated with the memory
493 * descriptor. The value does not need to be a pointer, but must fit
494 * in the space used by a pointer. This value is recorded in events
495 * associated with operations on this MD.
499 * The event handler used to log the operations performed on
500 * the memory region. If this argument is NULL operations
501 * performed on this memory descriptor are not logged.
503 lnet_handler_t handler;
505 * The bulk MD handle which was registered to describe the buffers
506 * either to be used to transfer data to the peer or receive data
507 * from the peer. This allows LNet to properly determine the NUMA
508 * node on which the memory was allocated and use that to select the
509 * nearest local network interface. This value is only used
510 * if the LNET_MD_BULK_HANDLE option is set.
512 struct lnet_handle_md bulk_handle;
515 /* Max Transfer Unit (minimum supported everywhere).
516 * CAVEAT EMPTOR, with multinet (i.e. routers forwarding between networks)
517 * these limits are system wide and not interface-local. */
518 #define LNET_MTU_BITS 20
519 #define LNET_MTU (1 << LNET_MTU_BITS)
522 * Options for the MD structure. See struct lnet_md::options.
524 #define LNET_MD_OP_PUT (1 << 0)
525 /** See struct lnet_md::options. */
526 #define LNET_MD_OP_GET (1 << 1)
527 /** See struct lnet_md::options. */
528 #define LNET_MD_MANAGE_REMOTE (1 << 2)
529 /* unused (1 << 3) */
530 /** See struct lnet_md::options. */
531 #define LNET_MD_TRUNCATE (1 << 4)
532 /** See struct lnet_md::options. */
533 #define LNET_MD_ACK_DISABLE (1 << 5)
534 /** See struct lnet_md::options. */
535 /* deprecated #define LNET_MD_IOVEC (1 << 6) */
536 /** See struct lnet_md::options. */
537 #define LNET_MD_MAX_SIZE (1 << 7)
538 /** See struct lnet_md::options. */
539 #define LNET_MD_KIOV (1 << 8)
540 /** See struct lnet_md::options. */
541 #define LNET_MD_BULK_HANDLE (1 << 9)
543 /* For compatibility with Cray Portals */
544 #define LNET_MD_PHYS 0
546 /** Infinite threshold on MD operations. See struct lnet_md::threshold */
547 #define LNET_MD_THRESH_INF (-1)
551 /** \addtogroup lnet_eq
555 * Six types of events can be logged in an event queue.
557 enum lnet_event_kind {
558 /** An incoming GET operation has completed on the MD. */
561 * An incoming PUT operation has completed on the MD. The
562 * underlying layers will not alter the memory (on behalf of this
563 * operation) once this event has been logged.
567 * A REPLY operation has completed. This event is logged after the
568 * data (if any) from the REPLY has been written into the MD.
571 /** An acknowledgment has been received. */
574 * An outgoing send (PUT or GET) operation has completed. This event
575 * is logged after the entire buffer has been sent and it is safe for
576 * the caller to reuse the buffer.
579 * - The LNET_EVENT_SEND doesn't guarantee message delivery. It can
580 * happen even when the message has not yet been put out on wire.
581 * - It's unsafe to assume that in an outgoing GET operation
582 * the LNET_EVENT_SEND event would happen before the
583 * LNET_EVENT_REPLY event. The same holds for LNET_EVENT_SEND and
584 * LNET_EVENT_ACK events in an outgoing PUT operation.
588 * A MD has been unlinked. Note that LNetMDUnlink() does not
589 * necessarily trigger an LNET_EVENT_UNLINK event.
595 #define LNET_SEQ_GT(a, b) (((signed long)((a) - (b))) > 0)
598 * Information about an event on a MD.
601 /** The identifier (nid, pid) of the target. */
602 struct lnet_process_id target;
603 /** The identifier (nid, pid) of the initiator. */
604 struct lnet_process_id initiator;
605 /** The source NID on the initiator. */
606 struct lnet_process_id source;
608 * The NID of the immediate sender. If the request has been forwarded
609 * by routers, this is the NID of the last hop; otherwise it's the
610 * same as the source.
613 /** Indicates the type of the event. */
614 enum lnet_event_kind type;
615 /** The portal table index specified in the request */
616 unsigned int pt_index;
617 /** A copy of the match bits specified in the request. */
619 /** The length (in bytes) specified in the request. */
620 unsigned int rlength;
622 * The length (in bytes) of the data that was manipulated by the
623 * operation. For truncated operations, the manipulated length will be
624 * the number of bytes specified by the MD (possibly with an offset,
625 * see struct lnet_md). For all other operations, the manipulated length
626 * will be the length of the requested operation, i.e. rlength.
628 unsigned int mlength;
630 * The handle to the MD associated with the event. The handle may be
631 * invalid if the MD has been unlinked.
633 struct lnet_handle_md md_handle;
635 * A snapshot of relevant state of the MD immediately after the event
636 * has been processed.
640 unsigned int md_options;
642 * 64 bits of out-of-band user data. Only valid for LNET_EVENT_PUT.
647 * The message type, to ensure a handler for LNET_EVENT_SEND can
648 * distinguish between LNET_MSG_GET and LNET_MSG_PUT.
652 * Indicates the completion status of the operation. It's 0 for
653 * successful operations, otherwise it's an error code.
657 * Indicates whether the MD has been unlinked. Note that:
658 * - An event with unlinked set is the last event on the MD.
659 * - This field is also set for an explicit LNET_EVENT_UNLINK event.
664 * The displacement (in bytes) into the memory region that the
665 * operation used. The offset can be determined by the operation for
666 * a remote managed MD or by the local MD.
667 * \see struct lnet_md::options
671 * The sequence number for this event. Sequence numbers are unique
674 volatile unsigned long sequence;
677 /** \addtogroup lnet_data
681 * Specify whether an acknowledgment should be sent by target when the PUT
682 * operation completes (i.e., when the data has been written to a MD of the
685 * \see struct lnet_md::options for the discussion on LNET_MD_ACK_DISABLE
686 * by which acknowledgments can be disabled for a MD.
689 /** Request an acknowledgment */
691 /** Request that no acknowledgment should be generated. */