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.
32 * lnet/include/lnet/lib-lnet.h
34 * Top level include for library side routines
37 #ifndef __LNET_LIB_LNET_H__
38 #define __LNET_LIB_LNET_H__
41 # error This include is only for kernel use.
44 #include <libcfs/libcfs.h>
46 #include <lnet/lib-types.h>
47 #include <uapi/linux/lnet/lnet-dlc.h>
48 #include <uapi/linux/lnet/lnet-types.h>
49 #include <uapi/linux/lnet/lnetctl.h>
50 #include <uapi/linux/lnet/nidstr.h>
52 extern struct lnet the_lnet; /* THE network */
54 #if (BITS_PER_LONG == 32)
55 /* 2 CPTs, allowing more CPTs might make us under memory pressure */
56 # define LNET_CPT_MAX_BITS 1
58 #else /* 64-bit system */
60 * 256 CPTs for thousands of CPUs, allowing more CPTs might make us
61 * under risk of consuming all lh_cookie.
63 # define LNET_CPT_MAX_BITS 8
64 #endif /* BITS_PER_LONG == 32 */
66 /* max allowed CPT number */
67 #define LNET_CPT_MAX (1 << LNET_CPT_MAX_BITS)
69 #define LNET_CPT_NUMBER (the_lnet.ln_cpt_number)
70 #define LNET_CPT_BITS (the_lnet.ln_cpt_bits)
71 #define LNET_CPT_MASK ((1ULL << LNET_CPT_BITS) - 1)
74 #define LNET_LOCK_EX CFS_PERCPT_LOCK_EX
77 #define DEFAULT_PEER_TIMEOUT 180
79 static inline int lnet_is_route_alive(struct lnet_route *route)
81 if (!route->lr_gateway->lpni_alive)
82 return 0; /* gateway is down */
83 if ((route->lr_gateway->lpni_ping_feats &
84 LNET_PING_FEAT_NI_STATUS) == 0)
85 return 1; /* no NI status, assume it's alive */
86 /* has NI status, check # down NIs */
87 return route->lr_downis == 0;
90 static inline int lnet_is_wire_handle_none(struct lnet_handle_wire *wh)
92 return (wh->wh_interface_cookie == LNET_WIRE_HANDLE_COOKIE_NONE &&
93 wh->wh_object_cookie == LNET_WIRE_HANDLE_COOKIE_NONE);
96 static inline int lnet_md_exhausted(struct lnet_libmd *md)
98 return (md->md_threshold == 0 ||
99 ((md->md_options & LNET_MD_MAX_SIZE) != 0 &&
100 md->md_offset + md->md_max_size > md->md_length));
103 static inline int lnet_md_unlinkable(struct lnet_libmd *md)
105 /* Should unlink md when its refcount is 0 and either:
106 * - md has been flagged for deletion (by auto unlink or LNetM[DE]Unlink,
107 * in the latter case md may not be exhausted).
108 * - auto unlink is on and md is exhausted.
110 if (md->md_refcount != 0)
113 if ((md->md_flags & LNET_MD_FLAG_ZOMBIE) != 0)
116 return ((md->md_flags & LNET_MD_FLAG_AUTO_UNLINK) != 0 &&
117 lnet_md_exhausted(md));
120 #define lnet_cpt_table() (the_lnet.ln_cpt_table)
121 #define lnet_cpt_current() cfs_cpt_current(the_lnet.ln_cpt_table, 1)
124 lnet_cpt_of_cookie(__u64 cookie)
126 unsigned int cpt = (cookie >> LNET_COOKIE_TYPE_BITS) & LNET_CPT_MASK;
128 /* LNET_CPT_NUMBER doesn't have to be power2, which means we can
129 * get illegal cpt from it's invalid cookie */
130 return cpt < LNET_CPT_NUMBER ? cpt : cpt % LNET_CPT_NUMBER;
134 lnet_res_lock(int cpt)
136 cfs_percpt_lock(the_lnet.ln_res_lock, cpt);
140 lnet_res_unlock(int cpt)
142 cfs_percpt_unlock(the_lnet.ln_res_lock, cpt);
146 lnet_res_lock_current(void)
148 int cpt = lnet_cpt_current();
155 lnet_net_lock(int cpt)
157 cfs_percpt_lock(the_lnet.ln_net_lock, cpt);
161 lnet_net_unlock(int cpt)
163 cfs_percpt_unlock(the_lnet.ln_net_lock, cpt);
167 lnet_net_lock_current(void)
169 int cpt = lnet_cpt_current();
175 #define LNET_LOCK() lnet_net_lock(LNET_LOCK_EX)
176 #define LNET_UNLOCK() lnet_net_unlock(LNET_LOCK_EX)
178 #define lnet_ptl_lock(ptl) spin_lock(&(ptl)->ptl_lock)
179 #define lnet_ptl_unlock(ptl) spin_unlock(&(ptl)->ptl_lock)
180 #define lnet_eq_wait_lock() spin_lock(&the_lnet.ln_eq_wait_lock)
181 #define lnet_eq_wait_unlock() spin_unlock(&the_lnet.ln_eq_wait_lock)
182 #define lnet_ni_lock(ni) spin_lock(&(ni)->ni_lock)
183 #define lnet_ni_unlock(ni) spin_unlock(&(ni)->ni_lock)
185 #define MAX_PORTALS 64
187 #define LNET_SMALL_MD_SIZE offsetof(struct lnet_libmd, md_iov.iov[1])
188 extern struct kmem_cache *lnet_mes_cachep; /* MEs kmem_cache */
189 extern struct kmem_cache *lnet_small_mds_cachep; /* <= LNET_SMALL_MD_SIZE bytes
192 static inline struct lnet_eq *
197 LIBCFS_ALLOC(eq, sizeof(*eq));
202 lnet_eq_free(struct lnet_eq *eq)
204 LIBCFS_FREE(eq, sizeof(*eq));
207 static inline struct lnet_libmd *
208 lnet_md_alloc(struct lnet_md *umd)
210 struct lnet_libmd *md;
214 if ((umd->options & LNET_MD_KIOV) != 0) {
216 size = offsetof(struct lnet_libmd, md_iov.kiov[niov]);
218 niov = ((umd->options & LNET_MD_IOVEC) != 0) ?
220 size = offsetof(struct lnet_libmd, md_iov.iov[niov]);
223 if (size <= LNET_SMALL_MD_SIZE) {
224 md = kmem_cache_alloc(lnet_small_mds_cachep,
225 GFP_NOFS | __GFP_ZERO);
227 CDEBUG(D_MALLOC, "slab-alloced 'md' of size %u at "
230 CDEBUG(D_MALLOC, "failed to allocate 'md' of size %u\n",
235 LIBCFS_ALLOC(md, size);
239 /* Set here in case of early free */
240 md->md_options = umd->options;
242 INIT_LIST_HEAD(&md->md_list);
249 lnet_md_free(struct lnet_libmd *md)
253 if ((md->md_options & LNET_MD_KIOV) != 0)
254 size = offsetof(struct lnet_libmd, md_iov.kiov[md->md_niov]);
256 size = offsetof(struct lnet_libmd, md_iov.iov[md->md_niov]);
258 if (size <= LNET_SMALL_MD_SIZE) {
259 CDEBUG(D_MALLOC, "slab-freed 'md' at %p.\n", md);
260 kmem_cache_free(lnet_small_mds_cachep, md);
262 LIBCFS_FREE(md, size);
266 static inline struct lnet_me *
271 me = kmem_cache_alloc(lnet_mes_cachep, GFP_NOFS | __GFP_ZERO);
274 CDEBUG(D_MALLOC, "slab-alloced 'me' at %p.\n", me);
276 CDEBUG(D_MALLOC, "failed to allocate 'me'\n");
282 lnet_me_free(struct lnet_me *me)
284 CDEBUG(D_MALLOC, "slab-freed 'me' at %p.\n", me);
285 kmem_cache_free(lnet_mes_cachep, me);
288 struct lnet_libhandle *lnet_res_lh_lookup(struct lnet_res_container *rec,
290 void lnet_res_lh_initialize(struct lnet_res_container *rec,
291 struct lnet_libhandle *lh);
293 lnet_res_lh_invalidate(struct lnet_libhandle *lh)
295 /* ALWAYS called with resource lock held */
296 /* NB: cookie is still useful, don't reset it */
297 list_del(&lh->lh_hash_chain);
301 lnet_eq2handle(struct lnet_handle_eq *handle, struct lnet_eq *eq)
304 LNetInvalidateEQHandle(handle);
308 handle->cookie = eq->eq_lh.lh_cookie;
311 static inline struct lnet_eq *
312 lnet_handle2eq(struct lnet_handle_eq *handle)
314 /* ALWAYS called with resource lock held */
315 struct lnet_libhandle *lh;
317 lh = lnet_res_lh_lookup(&the_lnet.ln_eq_container, handle->cookie);
321 return lh_entry(lh, struct lnet_eq, eq_lh);
325 lnet_md2handle(struct lnet_handle_md *handle, struct lnet_libmd *md)
327 handle->cookie = md->md_lh.lh_cookie;
330 static inline struct lnet_libmd *
331 lnet_handle2md(struct lnet_handle_md *handle)
333 /* ALWAYS called with resource lock held */
334 struct lnet_libhandle *lh;
337 cpt = lnet_cpt_of_cookie(handle->cookie);
338 lh = lnet_res_lh_lookup(the_lnet.ln_md_containers[cpt],
343 return lh_entry(lh, struct lnet_libmd, md_lh);
346 static inline struct lnet_libmd *
347 lnet_wire_handle2md(struct lnet_handle_wire *wh)
349 /* ALWAYS called with resource lock held */
350 struct lnet_libhandle *lh;
353 if (wh->wh_interface_cookie != the_lnet.ln_interface_cookie)
356 cpt = lnet_cpt_of_cookie(wh->wh_object_cookie);
357 lh = lnet_res_lh_lookup(the_lnet.ln_md_containers[cpt],
358 wh->wh_object_cookie);
362 return lh_entry(lh, struct lnet_libmd, md_lh);
366 lnet_me2handle(struct lnet_handle_me *handle, struct lnet_me *me)
368 handle->cookie = me->me_lh.lh_cookie;
371 static inline struct lnet_me *
372 lnet_handle2me(struct lnet_handle_me *handle)
374 /* ALWAYS called with resource lock held */
375 struct lnet_libhandle *lh;
378 cpt = lnet_cpt_of_cookie(handle->cookie);
379 lh = lnet_res_lh_lookup(the_lnet.ln_me_containers[cpt],
384 return lh_entry(lh, struct lnet_me, me_lh);
388 lnet_peer_net_addref_locked(struct lnet_peer_net *lpn)
390 atomic_inc(&lpn->lpn_refcount);
393 extern void lnet_destroy_peer_net_locked(struct lnet_peer_net *lpn);
396 lnet_peer_net_decref_locked(struct lnet_peer_net *lpn)
398 if (atomic_dec_and_test(&lpn->lpn_refcount))
399 lnet_destroy_peer_net_locked(lpn);
403 lnet_peer_addref_locked(struct lnet_peer *lp)
405 atomic_inc(&lp->lp_refcount);
408 extern void lnet_destroy_peer_locked(struct lnet_peer *lp);
411 lnet_peer_decref_locked(struct lnet_peer *lp)
413 if (atomic_dec_and_test(&lp->lp_refcount))
414 lnet_destroy_peer_locked(lp);
418 lnet_peer_ni_addref_locked(struct lnet_peer_ni *lp)
420 LASSERT(atomic_read(&lp->lpni_refcount) > 0);
421 atomic_inc(&lp->lpni_refcount);
424 extern void lnet_destroy_peer_ni_locked(struct lnet_peer_ni *lp);
427 lnet_peer_ni_decref_locked(struct lnet_peer_ni *lp)
429 LASSERT(atomic_read(&lp->lpni_refcount) > 0);
430 if (atomic_dec_and_test(&lp->lpni_refcount))
431 lnet_destroy_peer_ni_locked(lp);
435 lnet_isrouter(struct lnet_peer_ni *lp)
437 return lp->lpni_rtr_refcount != 0;
441 lnet_ni_addref_locked(struct lnet_ni *ni, int cpt)
443 LASSERT(cpt >= 0 && cpt < LNET_CPT_NUMBER);
444 LASSERT(*ni->ni_refs[cpt] >= 0);
446 (*ni->ni_refs[cpt])++;
450 lnet_ni_addref(struct lnet_ni *ni)
453 lnet_ni_addref_locked(ni, 0);
458 lnet_ni_decref_locked(struct lnet_ni *ni, int cpt)
460 LASSERT(cpt >= 0 && cpt < LNET_CPT_NUMBER);
461 LASSERT(*ni->ni_refs[cpt] > 0);
463 (*ni->ni_refs[cpt])--;
467 lnet_ni_decref(struct lnet_ni *ni)
470 lnet_ni_decref_locked(ni, 0);
474 static inline struct lnet_msg *
477 struct lnet_msg *msg;
479 LIBCFS_ALLOC(msg, sizeof(*msg));
481 /* no need to zero, LIBCFS_ALLOC does for us */
486 lnet_msg_free(struct lnet_msg *msg)
488 LASSERT(!msg->msg_onactivelist);
489 LIBCFS_FREE(msg, sizeof(*msg));
492 void lnet_ni_free(struct lnet_ni *ni);
493 void lnet_net_free(struct lnet_net *net);
496 lnet_net_alloc(__u32 net_type, struct list_head *netlist);
499 lnet_ni_alloc(struct lnet_net *net, struct cfs_expr_list *el,
502 lnet_ni_alloc_w_cpt_array(struct lnet_net *net, __u32 *cpts, __u32 ncpts,
506 lnet_nid2peerhash(lnet_nid_t nid)
508 return hash_long(nid, LNET_PEER_HASH_BITS);
511 static inline struct list_head *
512 lnet_net2rnethash(__u32 net)
514 return &the_lnet.ln_remote_nets_hash[(LNET_NETNUM(net) +
516 ((1U << the_lnet.ln_remote_nets_hbits) - 1)];
519 extern struct lnet_lnd the_lolnd;
520 extern int avoid_asym_router_failure;
522 extern unsigned int lnet_nid_cpt_hash(lnet_nid_t nid, unsigned int number);
523 extern int lnet_cpt_of_nid_locked(lnet_nid_t nid, struct lnet_ni *ni);
524 extern int lnet_cpt_of_nid(lnet_nid_t nid, struct lnet_ni *ni);
525 extern struct lnet_ni *lnet_nid2ni_locked(lnet_nid_t nid, int cpt);
526 extern struct lnet_ni *lnet_nid2ni_addref(lnet_nid_t nid);
527 extern struct lnet_ni *lnet_net2ni_locked(__u32 net, int cpt);
528 extern struct lnet_ni *lnet_net2ni_addref(__u32 net);
529 bool lnet_is_ni_healthy_locked(struct lnet_ni *ni);
530 struct lnet_net *lnet_get_net_locked(__u32 net_id);
532 int lnet_lib_init(void);
533 void lnet_lib_exit(void);
535 extern unsigned lnet_transaction_timeout;
536 extern unsigned int lnet_numa_range;
537 extern unsigned int lnet_health_sensitivity;
538 extern unsigned int lnet_peer_discovery_disabled;
539 extern int portal_rotor;
541 int lnet_notify(struct lnet_ni *ni, lnet_nid_t peer, int alive,
543 void lnet_notify_locked(struct lnet_peer_ni *lp, int notifylnd, int alive,
545 int lnet_add_route(__u32 net, __u32 hops, lnet_nid_t gateway_nid,
546 unsigned int priority);
547 int lnet_check_routes(void);
548 int lnet_del_route(__u32 net, lnet_nid_t gw_nid);
549 void lnet_destroy_routes(void);
550 int lnet_get_route(int idx, __u32 *net, __u32 *hops,
551 lnet_nid_t *gateway, __u32 *alive, __u32 *priority);
552 int lnet_get_rtr_pool_cfg(int idx, struct lnet_ioctl_pool_cfg *pool_cfg);
553 struct lnet_ni *lnet_get_next_ni_locked(struct lnet_net *mynet,
554 struct lnet_ni *prev);
555 struct lnet_ni *lnet_get_ni_idx_locked(int idx);
557 struct libcfs_ioctl_handler {
558 struct list_head item;
559 int (*handle_ioctl)(unsigned int cmd, struct libcfs_ioctl_hdr *hdr);
562 #define DECLARE_IOCTL_HANDLER(ident, func) \
563 static struct libcfs_ioctl_handler ident = { \
564 .item = LIST_HEAD_INIT(ident.item), \
565 .handle_ioctl = func \
568 extern int libcfs_register_ioctl(struct libcfs_ioctl_handler *hand);
569 extern int libcfs_deregister_ioctl(struct libcfs_ioctl_handler *hand);
570 extern int libcfs_ioctl_getdata(struct libcfs_ioctl_hdr **hdr_pp,
571 struct libcfs_ioctl_hdr __user *uparam);
572 extern int lnet_get_peer_list(__u32 *countp, __u32 *sizep,
573 struct lnet_process_id __user *ids);
575 void lnet_router_debugfs_init(void);
576 void lnet_router_debugfs_fini(void);
577 int lnet_rtrpools_alloc(int im_a_router);
578 void lnet_destroy_rtrbuf(struct lnet_rtrbuf *rb, int npages);
579 int lnet_rtrpools_adjust(int tiny, int small, int large);
580 int lnet_rtrpools_enable(void);
581 void lnet_rtrpools_disable(void);
582 void lnet_rtrpools_free(int keep_pools);
583 struct lnet_remotenet *lnet_find_rnet_locked(__u32 net);
584 int lnet_dyn_add_net(struct lnet_ioctl_config_data *conf);
585 int lnet_dyn_del_net(__u32 net);
586 int lnet_dyn_add_ni(struct lnet_ioctl_config_ni *conf);
587 int lnet_dyn_del_ni(struct lnet_ioctl_config_ni *conf);
588 int lnet_clear_lazy_portal(struct lnet_ni *ni, int portal, char *reason);
589 struct lnet_net *lnet_get_net_locked(__u32 net_id);
591 int lnet_islocalnid(lnet_nid_t nid);
592 int lnet_islocalnet(__u32 net);
594 void lnet_msg_attach_md(struct lnet_msg *msg, struct lnet_libmd *md,
595 unsigned int offset, unsigned int mlen);
596 void lnet_msg_detach_md(struct lnet_msg *msg, int status);
597 void lnet_build_unlink_event(struct lnet_libmd *md, struct lnet_event *ev);
598 void lnet_build_msg_event(struct lnet_msg *msg, enum lnet_event_kind ev_type);
599 void lnet_msg_commit(struct lnet_msg *msg, int cpt);
600 void lnet_msg_decommit(struct lnet_msg *msg, int cpt, int status);
602 void lnet_eq_enqueue_event(struct lnet_eq *eq, struct lnet_event *ev);
603 void lnet_prep_send(struct lnet_msg *msg, int type,
604 struct lnet_process_id target, unsigned int offset,
606 int lnet_send(lnet_nid_t nid, struct lnet_msg *msg, lnet_nid_t rtr_nid);
607 int lnet_send_ping(lnet_nid_t dest_nid, struct lnet_handle_md *mdh, int nnis,
608 void *user_ptr, struct lnet_handle_eq eqh, bool recovery);
609 void lnet_return_tx_credits_locked(struct lnet_msg *msg);
610 void lnet_return_rx_credits_locked(struct lnet_msg *msg);
611 void lnet_schedule_blocked_locked(struct lnet_rtrbufpool *rbp);
612 void lnet_drop_routed_msgs_locked(struct list_head *list, int cpt);
614 /* portals functions */
615 /* portals attributes */
617 lnet_ptl_is_lazy(struct lnet_portal *ptl)
619 return !!(ptl->ptl_options & LNET_PTL_LAZY);
623 lnet_ptl_is_unique(struct lnet_portal *ptl)
625 return !!(ptl->ptl_options & LNET_PTL_MATCH_UNIQUE);
629 lnet_ptl_is_wildcard(struct lnet_portal *ptl)
631 return !!(ptl->ptl_options & LNET_PTL_MATCH_WILDCARD);
635 lnet_ptl_setopt(struct lnet_portal *ptl, int opt)
637 ptl->ptl_options |= opt;
641 lnet_ptl_unsetopt(struct lnet_portal *ptl, int opt)
643 ptl->ptl_options &= ~opt;
646 /* match-table functions */
647 struct list_head *lnet_mt_match_head(struct lnet_match_table *mtable,
648 struct lnet_process_id id, __u64 mbits);
649 struct lnet_match_table *lnet_mt_of_attach(unsigned int index,
650 struct lnet_process_id id,
651 __u64 mbits, __u64 ignore_bits,
652 enum lnet_ins_pos pos);
653 int lnet_mt_match_md(struct lnet_match_table *mtable,
654 struct lnet_match_info *info, struct lnet_msg *msg);
656 /* portals match/attach functions */
657 void lnet_ptl_attach_md(struct lnet_me *me, struct lnet_libmd *md,
658 struct list_head *matches, struct list_head *drops);
659 void lnet_ptl_detach_md(struct lnet_me *me, struct lnet_libmd *md);
660 int lnet_ptl_match_md(struct lnet_match_info *info, struct lnet_msg *msg);
662 /* initialized and finalize portals */
663 int lnet_portals_create(void);
664 void lnet_portals_destroy(void);
666 /* message functions */
667 int lnet_parse(struct lnet_ni *ni, struct lnet_hdr *hdr,
668 lnet_nid_t fromnid, void *private, int rdma_req);
669 int lnet_parse_local(struct lnet_ni *ni, struct lnet_msg *msg);
670 int lnet_parse_forward_locked(struct lnet_ni *ni, struct lnet_msg *msg);
672 void lnet_recv(struct lnet_ni *ni, void *private, struct lnet_msg *msg,
673 int delayed, unsigned int offset, unsigned int mlen,
675 void lnet_ni_recv(struct lnet_ni *ni, void *private, struct lnet_msg *msg,
676 int delayed, unsigned int offset,
677 unsigned int mlen, unsigned int rlen);
679 struct lnet_msg *lnet_create_reply_msg(struct lnet_ni *ni,
680 struct lnet_msg *get_msg);
681 void lnet_set_reply_msg_len(struct lnet_ni *ni, struct lnet_msg *msg,
684 void lnet_finalize(struct lnet_msg *msg, int rc);
686 void lnet_drop_message(struct lnet_ni *ni, int cpt, void *private,
687 unsigned int nob, __u32 msg_type);
688 void lnet_drop_delayed_msg_list(struct list_head *head, char *reason);
689 void lnet_recv_delayed_msg_list(struct list_head *head);
691 int lnet_msg_container_setup(struct lnet_msg_container *container, int cpt);
692 void lnet_msg_container_cleanup(struct lnet_msg_container *container);
693 void lnet_msg_containers_destroy(void);
694 int lnet_msg_containers_create(void);
696 char *lnet_health_error2str(enum lnet_msg_hstatus hstatus);
697 char *lnet_msgtyp2str(int type);
698 void lnet_print_hdr(struct lnet_hdr *hdr);
699 int lnet_fail_nid(lnet_nid_t nid, unsigned int threshold);
701 /** \addtogroup lnet_fault_simulation @{ */
703 int lnet_fault_ctl(int cmd, struct libcfs_ioctl_data *data);
704 int lnet_fault_init(void);
705 void lnet_fault_fini(void);
707 bool lnet_drop_rule_match(struct lnet_hdr *hdr);
709 int lnet_delay_rule_add(struct lnet_fault_attr *attr);
710 int lnet_delay_rule_del(lnet_nid_t src, lnet_nid_t dst, bool shutdown);
711 int lnet_delay_rule_list(int pos, struct lnet_fault_attr *attr,
712 struct lnet_fault_stat *stat);
713 void lnet_delay_rule_reset(void);
714 void lnet_delay_rule_check(void);
715 bool lnet_delay_rule_match_locked(struct lnet_hdr *hdr, struct lnet_msg *msg);
717 /** @} lnet_fault_simulation */
719 void lnet_counters_get(struct lnet_counters *counters);
720 void lnet_counters_reset(void);
722 unsigned int lnet_iov_nob(unsigned int niov, struct kvec *iov);
723 int lnet_extract_iov(int dst_niov, struct kvec *dst,
724 int src_niov, struct kvec *src,
725 unsigned int offset, unsigned int len);
727 unsigned int lnet_kiov_nob (unsigned int niov, lnet_kiov_t *iov);
728 int lnet_extract_kiov(int dst_niov, lnet_kiov_t *dst,
729 int src_niov, lnet_kiov_t *src,
730 unsigned int offset, unsigned int len);
732 void lnet_copy_iov2iov(unsigned int ndiov, struct kvec *diov,
733 unsigned int doffset,
734 unsigned int nsiov, struct kvec *siov,
735 unsigned int soffset, unsigned int nob);
736 void lnet_copy_kiov2iov(unsigned int niov, struct kvec *iov,
737 unsigned int iovoffset,
738 unsigned int nkiov, lnet_kiov_t *kiov,
739 unsigned int kiovoffset, unsigned int nob);
740 void lnet_copy_iov2kiov(unsigned int nkiov, lnet_kiov_t *kiov,
741 unsigned int kiovoffset,
742 unsigned int niov, struct kvec *iov,
743 unsigned int iovoffset, unsigned int nob);
744 void lnet_copy_kiov2kiov(unsigned int ndkiov, lnet_kiov_t *dkiov,
745 unsigned int doffset,
746 unsigned int nskiov, lnet_kiov_t *skiov,
747 unsigned int soffset, unsigned int nob);
750 lnet_copy_iov2flat(int dlen, void *dest, unsigned int doffset,
751 unsigned int nsiov, struct kvec *siov, unsigned int soffset,
754 struct kvec diov = { .iov_base = dest, .iov_len = dlen };
756 lnet_copy_iov2iov(1, &diov, doffset,
757 nsiov, siov, soffset, nob);
761 lnet_copy_kiov2flat(int dlen, void *dest, unsigned int doffset,
762 unsigned int nsiov, lnet_kiov_t *skiov,
763 unsigned int soffset, unsigned int nob)
765 struct kvec diov = { .iov_base = dest, .iov_len = dlen };
767 lnet_copy_kiov2iov(1, &diov, doffset,
768 nsiov, skiov, soffset, nob);
772 lnet_copy_flat2iov(unsigned int ndiov, struct kvec *diov, unsigned int doffset,
773 int slen, void *src, unsigned int soffset,
776 struct kvec siov = { .iov_base = src, .iov_len = slen };
777 lnet_copy_iov2iov(ndiov, diov, doffset,
778 1, &siov, soffset, nob);
782 lnet_copy_flat2kiov(unsigned int ndiov, lnet_kiov_t *dkiov,
783 unsigned int doffset, int slen, void *src,
784 unsigned int soffset, unsigned int nob)
786 struct kvec siov = { .iov_base = src, .iov_len = slen };
787 lnet_copy_iov2kiov(ndiov, dkiov, doffset,
788 1, &siov, soffset, nob);
791 void lnet_me_unlink(struct lnet_me *me);
793 void lnet_md_unlink(struct lnet_libmd *md);
794 void lnet_md_deconstruct(struct lnet_libmd *lmd, struct lnet_md *umd);
795 struct page *lnet_kvaddr_to_page(unsigned long vaddr);
796 int lnet_cpt_of_md(struct lnet_libmd *md, unsigned int offset);
798 void lnet_register_lnd(struct lnet_lnd *lnd);
799 void lnet_unregister_lnd(struct lnet_lnd *lnd);
801 int lnet_connect(struct socket **sockp, lnet_nid_t peer_nid,
802 __u32 local_ip, __u32 peer_ip, int peer_port);
803 void lnet_connect_console_error(int rc, lnet_nid_t peer_nid,
804 __u32 peer_ip, int port);
805 int lnet_count_acceptor_nets(void);
806 int lnet_acceptor_timeout(void);
807 int lnet_acceptor_port(void);
808 int lnet_acceptor_start(void);
809 void lnet_acceptor_stop(void);
811 int lnet_ipif_query(char *name, int *up, __u32 *ip, __u32 *mask);
812 int lnet_ipif_enumerate(char ***names);
813 void lnet_ipif_free_enumeration(char **names, int n);
814 int lnet_sock_setbuf(struct socket *socket, int txbufsize, int rxbufsize);
815 int lnet_sock_getbuf(struct socket *socket, int *txbufsize, int *rxbufsize);
816 int lnet_sock_getaddr(struct socket *socket, bool remote, __u32 *ip, int *port);
817 int lnet_sock_write(struct socket *sock, void *buffer, int nob, int timeout);
818 int lnet_sock_read(struct socket *sock, void *buffer, int nob, int timeout);
820 int lnet_sock_listen(struct socket **sockp, __u32 ip, int port, int backlog);
821 int lnet_sock_accept(struct socket **newsockp, struct socket *sock);
822 int lnet_sock_connect(struct socket **sockp, int *fatal,
823 __u32 local_ip, int local_port,
824 __u32 peer_ip, int peer_port);
826 int lnet_peers_start_down(void);
827 int lnet_peer_buffer_credits(struct lnet_net *net);
829 int lnet_monitor_thr_start(void);
830 void lnet_monitor_thr_stop(void);
832 bool lnet_router_checker_active(void);
833 void lnet_check_routers(void);
834 int lnet_router_pre_mt_start(void);
835 void lnet_router_post_mt_start(void);
836 void lnet_prune_rc_data(int wait_unlink);
837 void lnet_router_cleanup(void);
838 void lnet_router_ni_update_locked(struct lnet_peer_ni *gw, __u32 net);
839 void lnet_swap_pinginfo(struct lnet_ping_buffer *pbuf);
841 int lnet_ping_info_validate(struct lnet_ping_info *pinfo);
842 struct lnet_ping_buffer *lnet_ping_buffer_alloc(int nnis, gfp_t gfp);
843 void lnet_ping_buffer_free(struct lnet_ping_buffer *pbuf);
845 static inline void lnet_ping_buffer_addref(struct lnet_ping_buffer *pbuf)
847 atomic_inc(&pbuf->pb_refcnt);
850 static inline void lnet_ping_buffer_decref(struct lnet_ping_buffer *pbuf)
852 if (atomic_dec_and_test(&pbuf->pb_refcnt))
853 lnet_ping_buffer_free(pbuf);
856 static inline int lnet_ping_buffer_numref(struct lnet_ping_buffer *pbuf)
858 return atomic_read(&pbuf->pb_refcnt);
861 static inline int lnet_push_target_resize_needed(void)
863 return the_lnet.ln_push_target->pb_nnis < the_lnet.ln_push_target_nnis;
866 int lnet_push_target_resize(void);
867 void lnet_peer_push_event(struct lnet_event *ev);
869 int lnet_parse_ip2nets(char **networksp, char *ip2nets);
870 int lnet_parse_routes(char *route_str, int *im_a_router);
871 int lnet_parse_networks(struct list_head *nilist, char *networks,
872 bool use_tcp_bonding);
873 bool lnet_net_unique(__u32 net_id, struct list_head *nilist,
874 struct lnet_net **net);
875 bool lnet_ni_unique_net(struct list_head *nilist, char *iface);
876 void lnet_incr_dlc_seq(void);
877 __u32 lnet_get_dlc_seq_locked(void);
879 struct lnet_peer_ni *lnet_get_next_peer_ni_locked(struct lnet_peer *peer,
880 struct lnet_peer_net *peer_net,
881 struct lnet_peer_ni *prev);
882 struct lnet_peer_ni *lnet_nid2peerni_locked(lnet_nid_t nid, lnet_nid_t pref,
884 struct lnet_peer_ni *lnet_nid2peerni_ex(lnet_nid_t nid, int cpt);
885 struct lnet_peer_ni *lnet_find_peer_ni_locked(lnet_nid_t nid);
886 struct lnet_peer *lnet_find_peer(lnet_nid_t nid);
887 void lnet_peer_net_added(struct lnet_net *net);
888 lnet_nid_t lnet_peer_primary_nid_locked(lnet_nid_t nid);
889 int lnet_discover_peer_locked(struct lnet_peer_ni *lpni, int cpt, bool block);
890 int lnet_peer_discovery_start(void);
891 void lnet_peer_discovery_stop(void);
892 void lnet_push_update_to_peers(int force);
893 void lnet_peer_tables_cleanup(struct lnet_net *net);
894 void lnet_peer_uninit(void);
895 int lnet_peer_tables_create(void);
896 void lnet_debug_peer(lnet_nid_t nid);
897 struct lnet_peer_net *lnet_peer_get_net_locked(struct lnet_peer *peer,
899 bool lnet_peer_is_pref_nid_locked(struct lnet_peer_ni *lpni, lnet_nid_t nid);
900 int lnet_peer_ni_set_non_mr_pref_nid(struct lnet_peer_ni *lpni, lnet_nid_t nid);
901 int lnet_add_peer_ni(lnet_nid_t key_nid, lnet_nid_t nid, bool mr);
902 int lnet_del_peer_ni(lnet_nid_t key_nid, lnet_nid_t nid);
903 int lnet_get_peer_info(struct lnet_ioctl_peer_cfg *cfg, void __user *bulk);
904 int lnet_get_peer_ni_info(__u32 peer_index, __u64 *nid,
905 char alivness[LNET_MAX_STR_LEN],
906 __u32 *cpt_iter, __u32 *refcount,
907 __u32 *ni_peer_tx_credits, __u32 *peer_tx_credits,
908 __u32 *peer_rtr_credits, __u32 *peer_min_rtr_credtis,
909 __u32 *peer_tx_qnob);
912 lnet_is_peer_ni_healthy_locked(struct lnet_peer_ni *lpni)
914 return lpni->lpni_healthy;
918 lnet_set_peer_ni_health_locked(struct lnet_peer_ni *lpni, bool health)
920 lpni->lpni_healthy = health;
924 lnet_is_peer_net_healthy_locked(struct lnet_peer_net *peer_net)
926 struct lnet_peer_ni *lpni;
928 list_for_each_entry(lpni, &peer_net->lpn_peer_nis,
930 if (lnet_is_peer_ni_healthy_locked(lpni))
938 lnet_is_peer_healthy_locked(struct lnet_peer *peer)
940 struct lnet_peer_net *peer_net;
942 list_for_each_entry(peer_net, &peer->lp_peer_nets, lpn_peer_nets) {
943 if (lnet_is_peer_net_healthy_locked(peer_net))
950 static inline struct lnet_peer_net *
951 lnet_find_peer_net_locked(struct lnet_peer *peer, __u32 net_id)
953 struct lnet_peer_net *peer_net;
955 list_for_each_entry(peer_net, &peer->lp_peer_nets, lpn_peer_nets) {
956 if (peer_net->lpn_net_id == net_id)
964 lnet_peer_set_alive(struct lnet_peer_ni *lp)
966 lp->lpni_last_alive = ktime_get_seconds();
967 lp->lpni_last_query = lp->lpni_last_alive;
969 lnet_notify_locked(lp, 0, 1, lp->lpni_last_alive);
973 lnet_peer_is_multi_rail(struct lnet_peer *lp)
975 if (lp->lp_state & LNET_PEER_MULTI_RAIL)
981 lnet_peer_ni_is_configured(struct lnet_peer_ni *lpni)
983 if (lpni->lpni_peer_net->lpn_peer->lp_state & LNET_PEER_CONFIGURED)
989 lnet_peer_ni_is_primary(struct lnet_peer_ni *lpni)
991 return lpni->lpni_nid == lpni->lpni_peer_net->lpn_peer->lp_primary_nid;
994 bool lnet_peer_is_uptodate(struct lnet_peer *lp);
997 lnet_peer_needs_push(struct lnet_peer *lp)
999 if (!(lp->lp_state & LNET_PEER_MULTI_RAIL))
1001 if (lp->lp_state & LNET_PEER_FORCE_PUSH)
1003 if (lp->lp_state & LNET_PEER_NO_DISCOVERY)
1005 if (lp->lp_node_seqno < atomic_read(&the_lnet.ln_ping_target_seqno))
1011 lnet_inc_healthv(atomic_t *healthv)
1013 atomic_add_unless(healthv, 1, LNET_MAX_HEALTH_VALUE);
1016 void lnet_incr_stats(struct lnet_element_stats *stats,
1017 enum lnet_msg_type msg_type,
1018 enum lnet_stats_type stats_type);
1020 __u32 lnet_sum_stats(struct lnet_element_stats *stats,
1021 enum lnet_stats_type stats_type);
1023 void lnet_usr_translate_stats(struct lnet_ioctl_element_msg_stats *msg_stats,
1024 struct lnet_element_stats *stats);