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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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 #define WIRE_ATTR __attribute__((packed))
112 /* Packed version of struct lnet_process_id to transfer via network */
113 struct lnet_process_id_packed {
115 lnet_pid_t pid; /* node id / process id */
118 /* The wire handle's interface cookie only matches one network interface in
119 * one epoch (i.e. new cookie when the interface restarts or the node
120 * reboots). The object cookie only matches one object on that interface
121 * during that object's lifetime (i.e. no cookie re-use). */
122 struct lnet_handle_wire {
123 __u64 wh_interface_cookie;
124 __u64 wh_object_cookie;
135 /* The variant fields of the portals message header are aligned on an 8
136 * byte boundary in the message header. Note that all types used in these
137 * wire structs MUST be fixed size and the smaller types are placed at the
140 struct lnet_handle_wire dst_wmd;
146 struct lnet_handle_wire ack_wmd;
154 struct lnet_handle_wire return_wmd;
162 struct lnet_handle_wire dst_wmd;
175 __u32 type; /* enum lnet_msg_type */
176 __u32 payload_length; /* payload data to follow */
177 /*<------__u64 aligned------->*/
182 struct lnet_reply reply;
183 struct lnet_hello hello;
187 /* A HELLO message contains a magic number and protocol version
188 * code in the header's dest_nid, the peer's NID in the src_nid, and
189 * LNET_MSG_HELLO in the type field. All other common fields are zero
190 * (including payload_size; i.e. no payload).
191 * This is for use by byte-stream LNDs (e.g. TCP/IP) to check the peer is
192 * running the same protocol and to find out its NID. These LNDs should
193 * exchange HELLO messages when a connection is first established. Individual
194 * LNDs can put whatever else they fancy in lnet_hdr::msg.
196 struct lnet_magicversion {
197 __u32 magic; /* LNET_PROTO_TCP_MAGIC */
198 __u16 version_major; /* increment on incompatible change */
199 __u16 version_minor; /* increment on compatible change */
202 /* PROTO MAGIC for LNDs */
203 #define LNET_PROTO_IB_MAGIC 0x0be91b91
204 #define LNET_PROTO_GNI_MAGIC 0xb00fbabe /* ask Kim */
205 #define LNET_PROTO_TCP_MAGIC 0xeebc0ded
206 #define LNET_PROTO_ACCEPTOR_MAGIC 0xacce7100
207 #define LNET_PROTO_PING_MAGIC 0x70696E67 /* 'ping' */
209 /* Placeholder for a future "unified" protocol across all LNDs */
210 /* Current LNDs that receive a request with this magic will respond
211 * with a "stub" reply using their current protocol */
212 #define LNET_PROTO_MAGIC 0x45726963 /* ! */
214 #define LNET_PROTO_TCP_VERSION_MAJOR 1
215 #define LNET_PROTO_TCP_VERSION_MINOR 0
217 /* Acceptor connection request */
218 struct lnet_acceptor_connreq {
219 __u32 acr_magic; /* PTL_ACCEPTOR_PROTO_MAGIC */
220 __u32 acr_version; /* protocol version */
221 __u64 acr_nid; /* target NID */
224 #define LNET_PROTO_ACCEPTOR_VERSION 1
226 struct lnet_counters_common {
227 __u32 lcc_msgs_alloc;
230 __u32 lcc_send_count;
231 __u32 lcc_recv_count;
232 __u32 lcc_route_count;
233 __u32 lcc_drop_count;
234 __u64 lcc_send_length;
235 __u64 lcc_recv_length;
236 __u64 lcc_route_length;
237 __u64 lcc_drop_length;
240 struct lnet_counters_health {
242 __u32 lch_resend_count;
243 __u32 lch_response_timeout_count;
244 __u32 lch_local_interrupt_count;
245 __u32 lch_local_dropped_count;
246 __u32 lch_local_aborted_count;
247 __u32 lch_local_no_route_count;
248 __u32 lch_local_timeout_count;
249 __u32 lch_local_error_count;
250 __u32 lch_remote_dropped_count;
251 __u32 lch_remote_error_count;
252 __u32 lch_remote_timeout_count;
253 __u32 lch_network_timeout_count;
256 struct lnet_counters {
257 struct lnet_counters_common lct_common;
258 struct lnet_counters_health lct_health;
261 #define LNET_NI_STATUS_UP 0x15aac0de
262 #define LNET_NI_STATUS_DOWN 0xdeadface
263 #define LNET_NI_STATUS_INVALID 0x00000000
265 struct lnet_ni_status {
272 * NB: value of these features equal to LNET_PROTO_PING_VERSION_x
273 * of old LNet, so there shouldn't be any compatibility issue
275 #define LNET_PING_FEAT_INVAL (0) /* no feature */
276 #define LNET_PING_FEAT_BASE (1 << 0) /* just a ping */
277 #define LNET_PING_FEAT_NI_STATUS (1 << 1) /* return NI status */
278 #define LNET_PING_FEAT_RTE_DISABLED (1 << 2) /* Routing enabled */
279 #define LNET_PING_FEAT_MULTI_RAIL (1 << 3) /* Multi-Rail aware */
280 #define LNET_PING_FEAT_DISCOVERY (1 << 4) /* Supports Discovery */
283 * All ping feature bits fit to hit the wire.
284 * In lnet_assert_wire_constants() this is compared against its open-coded
285 * value, and in lnet_ping_target_update() it is used to verify that no
286 * unknown bits have been set.
287 * New feature bits can be added, just be aware that this does change the
288 * over-the-wire protocol.
290 #define LNET_PING_FEAT_BITS (LNET_PING_FEAT_BASE | \
291 LNET_PING_FEAT_NI_STATUS | \
292 LNET_PING_FEAT_RTE_DISABLED | \
293 LNET_PING_FEAT_MULTI_RAIL | \
294 LNET_PING_FEAT_DISCOVERY)
296 struct lnet_ping_info {
301 struct lnet_ni_status pi_ni[0];
304 #define LNET_PING_INFO_SIZE(NNIDS) \
305 offsetof(struct lnet_ping_info, pi_ni[NNIDS])
306 #define LNET_PING_INFO_LONI(PINFO) ((PINFO)->pi_ni[0].ns_nid)
307 #define LNET_PING_INFO_SEQNO(PINFO) ((PINFO)->pi_ni[0].ns_status)
310 * This is a hard-coded limit on the number of interfaces supported by
311 * the interface bonding implemented by the ksocknal LND. It must be
312 * defined here because it is used in LNet data structures that are
313 * common to all LNDs.
315 #define LNET_INTERFACES_NUM 16
317 /* The minimum number of interfaces per node supported by LNet. */
318 #define LNET_INTERFACES_MIN 16
319 /* The default - arbitrary - value of the lnet_max_interfaces tunable. */
320 #define LNET_INTERFACES_MAX_DEFAULT 200
323 * Objects maintained by the LNet are accessed through handles. Handle types
324 * have names of the form lnet_handle_xx, where xx is one of the two letter
325 * object type codes ('eq' for event queue, 'md' for memory descriptor, and
326 * 'me' for match entry). Each type of object is given a unique handle type
327 * to enhance type checking.
329 #define LNET_WIRE_HANDLE_COOKIE_NONE (-1)
331 struct lnet_handle_eq {
336 * Invalidate eq handle \a h.
338 static inline void LNetInvalidateEQHandle(struct lnet_handle_eq *h)
340 h->cookie = LNET_WIRE_HANDLE_COOKIE_NONE;
344 * Check whether eq handle \a h is invalid.
346 * \return 1 if handle is invalid, 0 if valid.
348 static inline int LNetEQHandleIsInvalid(struct lnet_handle_eq h)
350 return (LNET_WIRE_HANDLE_COOKIE_NONE == h.cookie);
353 struct lnet_handle_md {
358 * Invalidate md handle \a h.
360 static inline void LNetInvalidateMDHandle(struct lnet_handle_md *h)
362 h->cookie = LNET_WIRE_HANDLE_COOKIE_NONE;
366 * Check whether eq handle \a h is invalid.
368 * \return 1 if handle is invalid, 0 if valid.
370 static inline int LNetMDHandleIsInvalid(struct lnet_handle_md h)
372 return (LNET_WIRE_HANDLE_COOKIE_NONE == h.cookie);
375 struct lnet_handle_me {
382 struct lnet_process_id {
390 /** \addtogroup lnet_me
394 * Specifies whether the match entry or memory descriptor should be unlinked
395 * automatically (LNET_UNLINK) or not (LNET_RETAIN).
403 * Values of the type enum lnet_ins_pos are used to control where a new match
404 * entry is inserted. The value LNET_INS_BEFORE is used to insert the new
405 * entry before the current entry or before the head of the list. The value
406 * LNET_INS_AFTER is used to insert the new entry after the current entry
407 * or after the last item in the list.
410 /** insert ME before current position or head of the list */
412 /** insert ME after current position or tail of the list */
414 /** attach ME at tail of local CPU partition ME list */
420 /** \addtogroup lnet_md
424 * Defines the visible parts of a memory descriptor. Values of this type
425 * are used to initialize memory descriptors.
429 * Specify the memory region associated with the memory descriptor.
430 * If the options field has:
431 * - LNET_MD_KIOV bit set: The start field points to the starting
432 * address of an array of lnet_kiov_t and the length field specifies
433 * the number of entries in the array. The length can't be bigger
434 * than LNET_MAX_IOV. The lnet_kiov_t is used to describe page-based
435 * fragments that are not necessarily mapped in virtal memory.
436 * - LNET_MD_IOVEC bit set: The start field points to the starting
437 * address of an array of struct kvec and the length field specifies
438 * the number of entries in the array. The length can't be bigger
439 * than LNET_MAX_IOV. The struct kvec is used to describe fragments
440 * that have virtual addresses.
441 * - Otherwise: The memory region is contiguous. The start field
442 * specifies the starting address for the memory region and the
443 * length field specifies its length.
445 * When the memory region is fragmented, all fragments but the first
446 * one must start on page boundary, and all but the last must end on
452 * Specifies the maximum number of operations that can be performed
453 * on the memory descriptor. An operation is any action that could
454 * possibly generate an event. In the usual case, the threshold value
455 * is decremented for each operation on the MD. When the threshold
456 * drops to zero, the MD becomes inactive and does not respond to
457 * operations. A threshold value of LNET_MD_THRESH_INF indicates that
458 * there is no bound on the number of operations that may be applied
463 * Specifies the largest incoming request that the memory descriptor
464 * should respond to. When the unused portion of a MD (length -
465 * local offset) falls below this value, the MD becomes inactive and
466 * does not respond to further operations. This value is only used
467 * if the LNET_MD_MAX_SIZE option is set.
471 * Specifies the behavior of the memory descriptor. A bitwise OR
472 * of the following values can be used:
473 * - LNET_MD_OP_PUT: The LNet PUT operation is allowed on this MD.
474 * - LNET_MD_OP_GET: The LNet GET operation is allowed on this MD.
475 * - LNET_MD_MANAGE_REMOTE: The offset used in accessing the memory
476 * region is provided by the incoming request. By default, the
477 * offset is maintained locally. When maintained locally, the
478 * offset is incremented by the length of the request so that
479 * the next operation (PUT or GET) will access the next part of
480 * the memory region. Note that only one offset variable exists
481 * per memory descriptor. If both PUT and GET operations are
482 * performed on a memory descriptor, the offset is updated each time.
483 * - LNET_MD_TRUNCATE: The length provided in the incoming request can
484 * be reduced to match the memory available in the region (determined
485 * by subtracting the offset from the length of the memory region).
486 * By default, if the length in the incoming operation is greater
487 * than the amount of memory available, the operation is rejected.
488 * - LNET_MD_ACK_DISABLE: An acknowledgment should not be sent for
489 * incoming PUT operations, even if requested. By default,
490 * acknowledgments are sent for PUT operations that request an
491 * acknowledgment. Acknowledgments are never sent for GET operations.
492 * The data sent in the REPLY serves as an implicit acknowledgment.
493 * - LNET_MD_KIOV: The start and length fields specify an array of
495 * - LNET_MD_IOVEC: The start and length fields specify an array of
497 * - LNET_MD_MAX_SIZE: The max_size field is valid.
498 * - LNET_MD_BULK_HANDLE: The bulk_handle field is valid.
501 * - LNET_MD_KIOV or LNET_MD_IOVEC allows for a scatter/gather
502 * capability for memory descriptors. They can't be both set.
503 * - When LNET_MD_MAX_SIZE is set, the total length of the memory
504 * region (i.e. sum of all fragment lengths) must not be less than
507 unsigned int options;
509 * A user-specified value that is associated with the memory
510 * descriptor. The value does not need to be a pointer, but must fit
511 * in the space used by a pointer. This value is recorded in events
512 * associated with operations on this MD.
516 * A handle for the event queue used to log the operations performed on
517 * the memory region. If this argument is a NULL handle (i.e. nullified
518 * by LNetInvalidateHandle()), operations performed on this memory
519 * descriptor are not logged.
521 struct lnet_handle_eq eq_handle;
523 * The bulk MD handle which was registered to describe the buffers
524 * either to be used to transfer data to the peer or receive data
525 * from the peer. This allows LNet to properly determine the NUMA
526 * node on which the memory was allocated and use that to select the
527 * nearest local network interface. This value is only used
528 * if the LNET_MD_BULK_HANDLE option is set.
530 struct lnet_handle_md bulk_handle;
533 /* Max Transfer Unit (minimum supported everywhere).
534 * CAVEAT EMPTOR, with multinet (i.e. routers forwarding between networks)
535 * these limits are system wide and not interface-local. */
536 #define LNET_MTU_BITS 20
537 #define LNET_MTU (1 << LNET_MTU_BITS)
540 * Options for the MD structure. See struct lnet_md::options.
542 #define LNET_MD_OP_PUT (1 << 0)
543 /** See struct lnet_md::options. */
544 #define LNET_MD_OP_GET (1 << 1)
545 /** See struct lnet_md::options. */
546 #define LNET_MD_MANAGE_REMOTE (1 << 2)
547 /* unused (1 << 3) */
548 /** See struct lnet_md::options. */
549 #define LNET_MD_TRUNCATE (1 << 4)
550 /** See struct lnet_md::options. */
551 #define LNET_MD_ACK_DISABLE (1 << 5)
552 /** See struct lnet_md::options. */
553 #define LNET_MD_IOVEC (1 << 6)
554 /** See struct lnet_md::options. */
555 #define LNET_MD_MAX_SIZE (1 << 7)
556 /** See struct lnet_md::options. */
557 #define LNET_MD_KIOV (1 << 8)
558 /** See struct lnet_md::options. */
559 #define LNET_MD_BULK_HANDLE (1 << 9)
561 /* For compatibility with Cray Portals */
562 #define LNET_MD_PHYS 0
564 /** Infinite threshold on MD operations. See struct lnet_md::threshold */
565 #define LNET_MD_THRESH_INF (-1)
568 * A page-based fragment of a MD.
571 /** Pointer to the page where the fragment resides */
572 struct page *kiov_page;
573 /** Length in bytes of the fragment */
574 unsigned int kiov_len;
576 * Starting offset of the fragment within the page. Note that the
577 * end of the fragment must not pass the end of the page; i.e.,
578 * kiov_len + kiov_offset <= PAGE_SIZE.
580 unsigned int kiov_offset;
584 /** \addtogroup lnet_eq
588 * Six types of events can be logged in an event queue.
590 enum lnet_event_kind {
591 /** An incoming GET operation has completed on the MD. */
594 * An incoming PUT operation has completed on the MD. The
595 * underlying layers will not alter the memory (on behalf of this
596 * operation) once this event has been logged.
600 * A REPLY operation has completed. This event is logged after the
601 * data (if any) from the REPLY has been written into the MD.
604 /** An acknowledgment has been received. */
607 * An outgoing send (PUT or GET) operation has completed. This event
608 * is logged after the entire buffer has been sent and it is safe for
609 * the caller to reuse the buffer.
612 * - The LNET_EVENT_SEND doesn't guarantee message delivery. It can
613 * happen even when the message has not yet been put out on wire.
614 * - It's unsafe to assume that in an outgoing GET operation
615 * the LNET_EVENT_SEND event would happen before the
616 * LNET_EVENT_REPLY event. The same holds for LNET_EVENT_SEND and
617 * LNET_EVENT_ACK events in an outgoing PUT operation.
621 * A MD has been unlinked. Note that LNetMDUnlink() does not
622 * necessarily trigger an LNET_EVENT_UNLINK event.
628 #define LNET_SEQ_GT(a, b) (((signed long)((a) - (b))) > 0)
631 * Information about an event on a MD.
634 /** The identifier (nid, pid) of the target. */
635 struct lnet_process_id target;
636 /** The identifier (nid, pid) of the initiator. */
637 struct lnet_process_id initiator;
638 /** The source NID on the initiator. */
639 struct lnet_process_id source;
641 * The NID of the immediate sender. If the request has been forwarded
642 * by routers, this is the NID of the last hop; otherwise it's the
643 * same as the source.
646 /** Indicates the type of the event. */
647 enum lnet_event_kind type;
648 /** The portal table index specified in the request */
649 unsigned int pt_index;
650 /** A copy of the match bits specified in the request. */
652 /** The length (in bytes) specified in the request. */
653 unsigned int rlength;
655 * The length (in bytes) of the data that was manipulated by the
656 * operation. For truncated operations, the manipulated length will be
657 * the number of bytes specified by the MD (possibly with an offset,
658 * see struct lnet_md). For all other operations, the manipulated length
659 * will be the length of the requested operation, i.e. rlength.
661 unsigned int mlength;
663 * The handle to the MD associated with the event. The handle may be
664 * invalid if the MD has been unlinked.
666 struct lnet_handle_md md_handle;
668 * A snapshot of the state of the MD immediately after the event has
669 * been processed. In particular, the threshold field in md will
670 * reflect the value of the threshold after the operation occurred.
674 * 64 bits of out-of-band user data. Only valid for LNET_EVENT_PUT.
679 * The message type, to ensure a handler for LNET_EVENT_SEND can
680 * distinguish between LNET_MSG_GET and LNET_MSG_PUT.
684 * Indicates the completion status of the operation. It's 0 for
685 * successful operations, otherwise it's an error code.
689 * Indicates whether the MD has been unlinked. Note that:
690 * - An event with unlinked set is the last event on the MD.
691 * - This field is also set for an explicit LNET_EVENT_UNLINK event.
696 * The displacement (in bytes) into the memory region that the
697 * operation used. The offset can be determined by the operation for
698 * a remote managed MD or by the local MD.
699 * \see struct lnet_md::options
703 * The sequence number for this event. Sequence numbers are unique
706 volatile unsigned long sequence;
710 * Event queue handler function type.
712 * The EQ handler runs for each event that is deposited into the EQ. The
713 * handler is supplied with a pointer to the event that triggered the
714 * handler invocation.
716 * The handler must not block, must be reentrant, and must not call any LNet
717 * API functions. It should return as quickly as possible.
719 typedef void (*lnet_eq_handler_t)(struct lnet_event *event);
720 #define LNET_EQ_HANDLER_NONE NULL
723 /** \addtogroup lnet_data
727 * Specify whether an acknowledgment should be sent by target when the PUT
728 * operation completes (i.e., when the data has been written to a MD of the
731 * \see struct lnet_md::options for the discussion on LNET_MD_ACK_DISABLE
732 * by which acknowledgments can be disabled for a MD.
735 /** Request an acknowledgment */
737 /** Request that no acknowledgment should be generated. */