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, 2016, 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/lnet.h>
47 #include <lnet/lib-types.h>
49 extern lnet_t the_lnet; /* THE network */
51 #if (BITS_PER_LONG == 32)
52 /* 2 CPTs, allowing more CPTs might make us under memory pressure */
53 # define LNET_CPT_MAX_BITS 1
55 #else /* 64-bit system */
57 * 256 CPTs for thousands of CPUs, allowing more CPTs might make us
58 * under risk of consuming all lh_cookie.
60 # define LNET_CPT_MAX_BITS 8
61 #endif /* BITS_PER_LONG == 32 */
63 /* max allowed CPT number */
64 #define LNET_CPT_MAX (1 << LNET_CPT_MAX_BITS)
66 #define LNET_CPT_NUMBER (the_lnet.ln_cpt_number)
67 #define LNET_CPT_BITS (the_lnet.ln_cpt_bits)
68 #define LNET_CPT_MASK ((1ULL << LNET_CPT_BITS) - 1)
71 #define LNET_LOCK_EX CFS_PERCPT_LOCK_EX
73 static inline int lnet_is_route_alive(lnet_route_t *route)
75 if (!route->lr_gateway->lpni_alive)
76 return 0; /* gateway is down */
77 if ((route->lr_gateway->lpni_ping_feats &
78 LNET_PING_FEAT_NI_STATUS) == 0)
79 return 1; /* no NI status, assume it's alive */
80 /* has NI status, check # down NIs */
81 return route->lr_downis == 0;
84 static inline int lnet_is_wire_handle_none(struct lnet_handle_wire *wh)
86 return (wh->wh_interface_cookie == LNET_WIRE_HANDLE_COOKIE_NONE &&
87 wh->wh_object_cookie == LNET_WIRE_HANDLE_COOKIE_NONE);
90 static inline int lnet_md_exhausted (lnet_libmd_t *md)
92 return (md->md_threshold == 0 ||
93 ((md->md_options & LNET_MD_MAX_SIZE) != 0 &&
94 md->md_offset + md->md_max_size > md->md_length));
97 static inline int lnet_md_unlinkable (lnet_libmd_t *md)
99 /* Should unlink md when its refcount is 0 and either:
100 * - md has been flagged for deletion (by auto unlink or LNetM[DE]Unlink,
101 * in the latter case md may not be exhausted).
102 * - auto unlink is on and md is exhausted.
104 if (md->md_refcount != 0)
107 if ((md->md_flags & LNET_MD_FLAG_ZOMBIE) != 0)
110 return ((md->md_flags & LNET_MD_FLAG_AUTO_UNLINK) != 0 &&
111 lnet_md_exhausted(md));
114 #define lnet_cpt_table() (the_lnet.ln_cpt_table)
115 #define lnet_cpt_current() cfs_cpt_current(the_lnet.ln_cpt_table, 1)
118 lnet_cpt_of_cookie(__u64 cookie)
120 unsigned int cpt = (cookie >> LNET_COOKIE_TYPE_BITS) & LNET_CPT_MASK;
122 /* LNET_CPT_NUMBER doesn't have to be power2, which means we can
123 * get illegal cpt from it's invalid cookie */
124 return cpt < LNET_CPT_NUMBER ? cpt : cpt % LNET_CPT_NUMBER;
128 lnet_res_lock(int cpt)
130 cfs_percpt_lock(the_lnet.ln_res_lock, cpt);
134 lnet_res_unlock(int cpt)
136 cfs_percpt_unlock(the_lnet.ln_res_lock, cpt);
140 lnet_res_lock_current(void)
142 int cpt = lnet_cpt_current();
149 lnet_net_lock(int cpt)
151 cfs_percpt_lock(the_lnet.ln_net_lock, cpt);
155 lnet_net_unlock(int cpt)
157 cfs_percpt_unlock(the_lnet.ln_net_lock, cpt);
161 lnet_net_lock_current(void)
163 int cpt = lnet_cpt_current();
169 #define LNET_LOCK() lnet_net_lock(LNET_LOCK_EX)
170 #define LNET_UNLOCK() lnet_net_unlock(LNET_LOCK_EX)
172 #define lnet_ptl_lock(ptl) spin_lock(&(ptl)->ptl_lock)
173 #define lnet_ptl_unlock(ptl) spin_unlock(&(ptl)->ptl_lock)
174 #define lnet_eq_wait_lock() spin_lock(&the_lnet.ln_eq_wait_lock)
175 #define lnet_eq_wait_unlock() spin_unlock(&the_lnet.ln_eq_wait_lock)
176 #define lnet_ni_lock(ni) spin_lock(&(ni)->ni_lock)
177 #define lnet_ni_unlock(ni) spin_unlock(&(ni)->ni_lock)
179 #define MAX_PORTALS 64
181 #define LNET_SMALL_MD_SIZE offsetof(lnet_libmd_t, md_iov.iov[1])
182 extern struct kmem_cache *lnet_mes_cachep; /* MEs kmem_cache */
183 extern struct kmem_cache *lnet_small_mds_cachep; /* <= LNET_SMALL_MD_SIZE bytes
186 static inline lnet_eq_t *
191 LIBCFS_ALLOC(eq, sizeof(*eq));
196 lnet_eq_free(lnet_eq_t *eq)
198 LIBCFS_FREE(eq, sizeof(*eq));
201 static inline lnet_libmd_t *
202 lnet_md_alloc (lnet_md_t *umd)
208 if ((umd->options & LNET_MD_KIOV) != 0) {
210 size = offsetof(lnet_libmd_t, md_iov.kiov[niov]);
212 niov = ((umd->options & LNET_MD_IOVEC) != 0) ?
214 size = offsetof(lnet_libmd_t, md_iov.iov[niov]);
217 if (size <= LNET_SMALL_MD_SIZE) {
218 md = kmem_cache_alloc(lnet_small_mds_cachep,
219 GFP_NOFS | __GFP_ZERO);
221 CDEBUG(D_MALLOC, "slab-alloced 'md' of size %u at "
224 CDEBUG(D_MALLOC, "failed to allocate 'md' of size %u\n",
229 LIBCFS_ALLOC(md, size);
233 /* Set here in case of early free */
234 md->md_options = umd->options;
236 INIT_LIST_HEAD(&md->md_list);
243 lnet_md_free(lnet_libmd_t *md)
247 if ((md->md_options & LNET_MD_KIOV) != 0)
248 size = offsetof(lnet_libmd_t, md_iov.kiov[md->md_niov]);
250 size = offsetof(lnet_libmd_t, md_iov.iov[md->md_niov]);
252 if (size <= LNET_SMALL_MD_SIZE) {
253 CDEBUG(D_MALLOC, "slab-freed 'md' at %p.\n", md);
254 kmem_cache_free(lnet_small_mds_cachep, md);
256 LIBCFS_FREE(md, size);
260 static inline lnet_me_t *
265 me = kmem_cache_alloc(lnet_mes_cachep, GFP_NOFS | __GFP_ZERO);
268 CDEBUG(D_MALLOC, "slab-alloced 'me' at %p.\n", me);
270 CDEBUG(D_MALLOC, "failed to allocate 'me'\n");
276 lnet_me_free(lnet_me_t *me)
278 CDEBUG(D_MALLOC, "slab-freed 'me' at %p.\n", me);
279 kmem_cache_free(lnet_mes_cachep, me);
282 lnet_libhandle_t *lnet_res_lh_lookup(struct lnet_res_container *rec,
284 void lnet_res_lh_initialize(struct lnet_res_container *rec,
285 lnet_libhandle_t *lh);
287 lnet_res_lh_invalidate(lnet_libhandle_t *lh)
289 /* ALWAYS called with resource lock held */
290 /* NB: cookie is still useful, don't reset it */
291 list_del(&lh->lh_hash_chain);
295 lnet_eq2handle (lnet_handle_eq_t *handle, lnet_eq_t *eq)
298 LNetInvalidateHandle(handle);
302 handle->cookie = eq->eq_lh.lh_cookie;
305 static inline lnet_eq_t *
306 lnet_handle2eq(lnet_handle_eq_t *handle)
308 /* ALWAYS called with resource lock held */
309 lnet_libhandle_t *lh;
311 lh = lnet_res_lh_lookup(&the_lnet.ln_eq_container, handle->cookie);
315 return lh_entry(lh, lnet_eq_t, eq_lh);
319 lnet_md2handle (lnet_handle_md_t *handle, lnet_libmd_t *md)
321 handle->cookie = md->md_lh.lh_cookie;
324 static inline lnet_libmd_t *
325 lnet_handle2md(lnet_handle_md_t *handle)
327 /* ALWAYS called with resource lock held */
328 lnet_libhandle_t *lh;
331 cpt = lnet_cpt_of_cookie(handle->cookie);
332 lh = lnet_res_lh_lookup(the_lnet.ln_md_containers[cpt],
337 return lh_entry(lh, lnet_libmd_t, md_lh);
340 static inline lnet_libmd_t *
341 lnet_wire_handle2md(struct lnet_handle_wire *wh)
343 /* ALWAYS called with resource lock held */
344 lnet_libhandle_t *lh;
347 if (wh->wh_interface_cookie != the_lnet.ln_interface_cookie)
350 cpt = lnet_cpt_of_cookie(wh->wh_object_cookie);
351 lh = lnet_res_lh_lookup(the_lnet.ln_md_containers[cpt],
352 wh->wh_object_cookie);
356 return lh_entry(lh, lnet_libmd_t, md_lh);
360 lnet_me2handle (lnet_handle_me_t *handle, lnet_me_t *me)
362 handle->cookie = me->me_lh.lh_cookie;
365 static inline lnet_me_t *
366 lnet_handle2me(lnet_handle_me_t *handle)
368 /* ALWAYS called with resource lock held */
369 lnet_libhandle_t *lh;
372 cpt = lnet_cpt_of_cookie(handle->cookie);
373 lh = lnet_res_lh_lookup(the_lnet.ln_me_containers[cpt],
378 return lh_entry(lh, lnet_me_t, me_lh);
382 lnet_peer_net_addref_locked(struct lnet_peer_net *lpn)
384 atomic_inc(&lpn->lpn_refcount);
387 extern void lnet_destroy_peer_net_locked(struct lnet_peer_net *lpn);
390 lnet_peer_net_decref_locked(struct lnet_peer_net *lpn)
392 if (atomic_dec_and_test(&lpn->lpn_refcount))
393 lnet_destroy_peer_net_locked(lpn);
397 lnet_peer_addref_locked(struct lnet_peer *lp)
399 atomic_inc(&lp->lp_refcount);
402 extern void lnet_destroy_peer_locked(struct lnet_peer *lp);
405 lnet_peer_decref_locked(struct lnet_peer *lp)
407 if (atomic_dec_and_test(&lp->lp_refcount))
408 lnet_destroy_peer_locked(lp);
412 lnet_peer_ni_addref_locked(struct lnet_peer_ni *lp)
414 LASSERT(atomic_read(&lp->lpni_refcount) > 0);
415 atomic_inc(&lp->lpni_refcount);
418 extern void lnet_destroy_peer_ni_locked(struct lnet_peer_ni *lp);
421 lnet_peer_ni_decref_locked(struct lnet_peer_ni *lp)
423 LASSERT(atomic_read(&lp->lpni_refcount) > 0);
424 if (atomic_dec_and_test(&lp->lpni_refcount))
425 lnet_destroy_peer_ni_locked(lp);
429 lnet_isrouter(struct lnet_peer_ni *lp)
431 return lp->lpni_rtr_refcount != 0;
435 lnet_ni_addref_locked(lnet_ni_t *ni, int cpt)
437 LASSERT(cpt >= 0 && cpt < LNET_CPT_NUMBER);
438 LASSERT(*ni->ni_refs[cpt] >= 0);
440 (*ni->ni_refs[cpt])++;
444 lnet_ni_addref(lnet_ni_t *ni)
447 lnet_ni_addref_locked(ni, 0);
452 lnet_ni_decref_locked(lnet_ni_t *ni, int cpt)
454 LASSERT(cpt >= 0 && cpt < LNET_CPT_NUMBER);
455 LASSERT(*ni->ni_refs[cpt] > 0);
457 (*ni->ni_refs[cpt])--;
461 lnet_ni_decref(lnet_ni_t *ni)
464 lnet_ni_decref_locked(ni, 0);
468 static inline lnet_msg_t *
473 LIBCFS_ALLOC(msg, sizeof(*msg));
475 /* no need to zero, LIBCFS_ALLOC does for us */
480 lnet_msg_free(lnet_msg_t *msg)
482 LASSERT(!msg->msg_onactivelist);
483 LIBCFS_FREE(msg, sizeof(*msg));
486 void lnet_ni_free(struct lnet_ni *ni);
487 void lnet_net_free(struct lnet_net *net);
490 lnet_net_alloc(__u32 net_type, struct list_head *netlist);
493 lnet_ni_alloc(struct lnet_net *net, struct cfs_expr_list *el,
496 lnet_ni_alloc_w_cpt_array(struct lnet_net *net, __u32 *cpts, __u32 ncpts,
500 lnet_nid2peerhash(lnet_nid_t nid)
502 return hash_long(nid, LNET_PEER_HASH_BITS);
505 static inline struct list_head *
506 lnet_net2rnethash(__u32 net)
508 return &the_lnet.ln_remote_nets_hash[(LNET_NETNUM(net) +
510 ((1U << the_lnet.ln_remote_nets_hbits) - 1)];
513 extern lnd_t the_lolnd;
514 extern int avoid_asym_router_failure;
516 extern unsigned int lnet_nid_cpt_hash(lnet_nid_t nid, unsigned int number);
517 extern int lnet_cpt_of_nid_locked(lnet_nid_t nid, struct lnet_ni *ni);
518 extern int lnet_cpt_of_nid(lnet_nid_t nid, struct lnet_ni *ni);
519 extern lnet_ni_t *lnet_nid2ni_locked(lnet_nid_t nid, int cpt);
520 extern lnet_ni_t *lnet_nid2ni_addref(lnet_nid_t nid);
521 extern lnet_ni_t *lnet_net2ni_locked(__u32 net, int cpt);
522 extern lnet_ni_t *lnet_net2ni_addref(__u32 net);
523 bool lnet_is_ni_healthy_locked(struct lnet_ni *ni);
524 struct lnet_net *lnet_get_net_locked(__u32 net_id);
526 int lnet_lib_init(void);
527 void lnet_lib_exit(void);
529 extern unsigned int lnet_numa_range;
530 extern unsigned int lnet_peer_discovery_enabled;
531 extern int portal_rotor;
533 int lnet_notify(lnet_ni_t *ni, lnet_nid_t peer, int alive, cfs_time_t when);
534 void lnet_notify_locked(struct lnet_peer_ni *lp, int notifylnd, int alive,
536 int lnet_add_route(__u32 net, __u32 hops, lnet_nid_t gateway_nid,
537 unsigned int priority);
538 int lnet_check_routes(void);
539 int lnet_del_route(__u32 net, lnet_nid_t gw_nid);
540 void lnet_destroy_routes(void);
541 int lnet_get_route(int idx, __u32 *net, __u32 *hops,
542 lnet_nid_t *gateway, __u32 *alive, __u32 *priority);
543 int lnet_get_rtr_pool_cfg(int idx, struct lnet_ioctl_pool_cfg *pool_cfg);
544 struct lnet_ni *lnet_get_next_ni_locked(struct lnet_net *mynet,
545 struct lnet_ni *prev);
546 struct lnet_ni *lnet_get_ni_idx_locked(int idx);
548 struct libcfs_ioctl_handler {
549 struct list_head item;
550 int (*handle_ioctl)(unsigned int cmd, struct libcfs_ioctl_hdr *hdr);
553 #define DECLARE_IOCTL_HANDLER(ident, func) \
554 static struct libcfs_ioctl_handler ident = { \
555 /* .item = */ LIST_HEAD_INIT(ident.item), \
556 /* .handle_ioctl = */ func \
559 extern int libcfs_register_ioctl(struct libcfs_ioctl_handler *hand);
560 extern int libcfs_deregister_ioctl(struct libcfs_ioctl_handler *hand);
561 extern int libcfs_ioctl_getdata(struct libcfs_ioctl_hdr **hdr_pp,
562 struct libcfs_ioctl_hdr __user *uparam);
564 void lnet_proc_init(void);
565 void lnet_proc_fini(void);
566 int lnet_rtrpools_alloc(int im_a_router);
567 void lnet_destroy_rtrbuf(lnet_rtrbuf_t *rb, int npages);
568 int lnet_rtrpools_adjust(int tiny, int small, int large);
569 int lnet_rtrpools_enable(void);
570 void lnet_rtrpools_disable(void);
571 void lnet_rtrpools_free(int keep_pools);
572 lnet_remotenet_t *lnet_find_rnet_locked(__u32 net);
573 int lnet_dyn_add_net(struct lnet_ioctl_config_data *conf);
574 int lnet_dyn_del_net(__u32 net);
575 int lnet_dyn_add_ni(struct lnet_ioctl_config_ni *conf);
576 int lnet_dyn_del_ni(struct lnet_ioctl_config_ni *conf);
577 int lnet_clear_lazy_portal(struct lnet_ni *ni, int portal, char *reason);
578 struct lnet_net *lnet_get_net_locked(__u32 net_id);
580 int lnet_islocalnid(lnet_nid_t nid);
581 int lnet_islocalnet(__u32 net);
583 void lnet_msg_attach_md(lnet_msg_t *msg, lnet_libmd_t *md,
584 unsigned int offset, unsigned int mlen);
585 void lnet_msg_detach_md(lnet_msg_t *msg, int status);
586 void lnet_build_unlink_event(lnet_libmd_t *md, lnet_event_t *ev);
587 void lnet_build_msg_event(lnet_msg_t *msg, lnet_event_kind_t ev_type);
588 void lnet_msg_commit(lnet_msg_t *msg, int cpt);
589 void lnet_msg_decommit(lnet_msg_t *msg, int cpt, int status);
591 void lnet_eq_enqueue_event(lnet_eq_t *eq, lnet_event_t *ev);
592 void lnet_prep_send(lnet_msg_t *msg, int type, lnet_process_id_t target,
593 unsigned int offset, unsigned int len);
594 int lnet_send(lnet_nid_t nid, lnet_msg_t *msg, lnet_nid_t rtr_nid);
595 void lnet_return_tx_credits_locked(lnet_msg_t *msg);
596 void lnet_return_rx_credits_locked(lnet_msg_t *msg);
597 void lnet_schedule_blocked_locked(lnet_rtrbufpool_t *rbp);
598 void lnet_drop_routed_msgs_locked(struct list_head *list, int cpt);
600 /* portals functions */
601 /* portals attributes */
603 lnet_ptl_is_lazy(lnet_portal_t *ptl)
605 return !!(ptl->ptl_options & LNET_PTL_LAZY);
609 lnet_ptl_is_unique(lnet_portal_t *ptl)
611 return !!(ptl->ptl_options & LNET_PTL_MATCH_UNIQUE);
615 lnet_ptl_is_wildcard(lnet_portal_t *ptl)
617 return !!(ptl->ptl_options & LNET_PTL_MATCH_WILDCARD);
621 lnet_ptl_setopt(lnet_portal_t *ptl, int opt)
623 ptl->ptl_options |= opt;
627 lnet_ptl_unsetopt(lnet_portal_t *ptl, int opt)
629 ptl->ptl_options &= ~opt;
632 /* match-table functions */
633 struct list_head *lnet_mt_match_head(struct lnet_match_table *mtable,
634 lnet_process_id_t id, __u64 mbits);
635 struct lnet_match_table *lnet_mt_of_attach(unsigned int index,
636 lnet_process_id_t id, __u64 mbits,
639 int lnet_mt_match_md(struct lnet_match_table *mtable,
640 struct lnet_match_info *info, struct lnet_msg *msg);
642 /* portals match/attach functions */
643 void lnet_ptl_attach_md(lnet_me_t *me, lnet_libmd_t *md,
644 struct list_head *matches, struct list_head *drops);
645 void lnet_ptl_detach_md(lnet_me_t *me, lnet_libmd_t *md);
646 int lnet_ptl_match_md(struct lnet_match_info *info, struct lnet_msg *msg);
648 /* initialized and finalize portals */
649 int lnet_portals_create(void);
650 void lnet_portals_destroy(void);
652 /* message functions */
653 int lnet_parse (lnet_ni_t *ni, lnet_hdr_t *hdr,
654 lnet_nid_t fromnid, void *private, int rdma_req);
655 int lnet_parse_local(lnet_ni_t *ni, lnet_msg_t *msg);
656 int lnet_parse_forward_locked(lnet_ni_t *ni, lnet_msg_t *msg);
658 void lnet_recv(lnet_ni_t *ni, void *private, lnet_msg_t *msg, int delayed,
659 unsigned int offset, unsigned int mlen, unsigned int rlen);
660 void lnet_ni_recv(lnet_ni_t *ni, void *private, lnet_msg_t *msg,
661 int delayed, unsigned int offset,
662 unsigned int mlen, unsigned int rlen);
664 lnet_msg_t *lnet_create_reply_msg (lnet_ni_t *ni, lnet_msg_t *get_msg);
665 void lnet_set_reply_msg_len(lnet_ni_t *ni, lnet_msg_t *msg, unsigned int len);
667 void lnet_finalize(lnet_ni_t *ni, lnet_msg_t *msg, int rc);
669 void lnet_drop_message(lnet_ni_t *ni, int cpt, void *private,
671 void lnet_drop_delayed_msg_list(struct list_head *head, char *reason);
672 void lnet_recv_delayed_msg_list(struct list_head *head);
674 int lnet_msg_container_setup(struct lnet_msg_container *container, int cpt);
675 void lnet_msg_container_cleanup(struct lnet_msg_container *container);
676 void lnet_msg_containers_destroy(void);
677 int lnet_msg_containers_create(void);
679 char *lnet_msgtyp2str (int type);
680 void lnet_print_hdr (lnet_hdr_t * hdr);
681 int lnet_fail_nid(lnet_nid_t nid, unsigned int threshold);
683 /** \addtogroup lnet_fault_simulation @{ */
685 int lnet_fault_ctl(int cmd, struct libcfs_ioctl_data *data);
686 int lnet_fault_init(void);
687 void lnet_fault_fini(void);
689 bool lnet_drop_rule_match(lnet_hdr_t *hdr);
691 int lnet_delay_rule_add(struct lnet_fault_attr *attr);
692 int lnet_delay_rule_del(lnet_nid_t src, lnet_nid_t dst, bool shutdown);
693 int lnet_delay_rule_list(int pos, struct lnet_fault_attr *attr,
694 struct lnet_fault_stat *stat);
695 void lnet_delay_rule_reset(void);
696 void lnet_delay_rule_check(void);
697 bool lnet_delay_rule_match_locked(lnet_hdr_t *hdr, struct lnet_msg *msg);
699 /** @} lnet_fault_simulation */
701 void lnet_counters_get(lnet_counters_t *counters);
702 void lnet_counters_reset(void);
704 unsigned int lnet_iov_nob(unsigned int niov, struct kvec *iov);
705 int lnet_extract_iov(int dst_niov, struct kvec *dst,
706 int src_niov, struct kvec *src,
707 unsigned int offset, unsigned int len);
709 unsigned int lnet_kiov_nob (unsigned int niov, lnet_kiov_t *iov);
710 int lnet_extract_kiov(int dst_niov, lnet_kiov_t *dst,
711 int src_niov, lnet_kiov_t *src,
712 unsigned int offset, unsigned int len);
714 void lnet_copy_iov2iov(unsigned int ndiov, struct kvec *diov,
715 unsigned int doffset,
716 unsigned int nsiov, struct kvec *siov,
717 unsigned int soffset, unsigned int nob);
718 void lnet_copy_kiov2iov(unsigned int niov, struct kvec *iov,
719 unsigned int iovoffset,
720 unsigned int nkiov, lnet_kiov_t *kiov,
721 unsigned int kiovoffset, unsigned int nob);
722 void lnet_copy_iov2kiov(unsigned int nkiov, lnet_kiov_t *kiov,
723 unsigned int kiovoffset,
724 unsigned int niov, struct kvec *iov,
725 unsigned int iovoffset, unsigned int nob);
726 void lnet_copy_kiov2kiov(unsigned int ndkiov, lnet_kiov_t *dkiov,
727 unsigned int doffset,
728 unsigned int nskiov, lnet_kiov_t *skiov,
729 unsigned int soffset, unsigned int nob);
732 lnet_copy_iov2flat(int dlen, void *dest, unsigned int doffset,
733 unsigned int nsiov, struct kvec *siov, unsigned int soffset,
736 struct kvec diov = {/*.iov_base = */ dest, /*.iov_len = */ dlen};
738 lnet_copy_iov2iov(1, &diov, doffset,
739 nsiov, siov, soffset, nob);
743 lnet_copy_kiov2flat(int dlen, void *dest, unsigned int doffset,
744 unsigned int nsiov, lnet_kiov_t *skiov,
745 unsigned int soffset, unsigned int nob)
747 struct kvec diov = {/* .iov_base = */ dest, /* .iov_len = */ dlen};
749 lnet_copy_kiov2iov(1, &diov, doffset,
750 nsiov, skiov, soffset, nob);
754 lnet_copy_flat2iov(unsigned int ndiov, struct kvec *diov, unsigned int doffset,
755 int slen, void *src, unsigned int soffset,
758 struct kvec siov = {/*.iov_base = */ src, /*.iov_len = */slen};
759 lnet_copy_iov2iov(ndiov, diov, doffset,
760 1, &siov, soffset, nob);
764 lnet_copy_flat2kiov(unsigned int ndiov, lnet_kiov_t *dkiov,
765 unsigned int doffset, int slen, void *src,
766 unsigned int soffset, unsigned int nob)
768 struct kvec siov = {/* .iov_base = */ src, /* .iov_len = */ slen};
769 lnet_copy_iov2kiov(ndiov, dkiov, doffset,
770 1, &siov, soffset, nob);
773 void lnet_me_unlink(lnet_me_t *me);
775 void lnet_md_unlink(lnet_libmd_t *md);
776 void lnet_md_deconstruct(lnet_libmd_t *lmd, lnet_md_t *umd);
777 int lnet_cpt_of_md(lnet_libmd_t *md);
779 void lnet_register_lnd(lnd_t *lnd);
780 void lnet_unregister_lnd(lnd_t *lnd);
782 int lnet_connect(struct socket **sockp, lnet_nid_t peer_nid,
783 __u32 local_ip, __u32 peer_ip, int peer_port);
784 void lnet_connect_console_error(int rc, lnet_nid_t peer_nid,
785 __u32 peer_ip, int port);
786 int lnet_count_acceptor_nets(void);
787 int lnet_acceptor_timeout(void);
788 int lnet_acceptor_port(void);
789 int lnet_acceptor_start(void);
790 void lnet_acceptor_stop(void);
792 int lnet_ipif_query(char *name, int *up, __u32 *ip, __u32 *mask);
793 int lnet_ipif_enumerate(char ***names);
794 void lnet_ipif_free_enumeration(char **names, int n);
795 int lnet_sock_setbuf(struct socket *socket, int txbufsize, int rxbufsize);
796 int lnet_sock_getbuf(struct socket *socket, int *txbufsize, int *rxbufsize);
797 int lnet_sock_getaddr(struct socket *socket, bool remote, __u32 *ip, int *port);
798 int lnet_sock_write(struct socket *sock, void *buffer, int nob, int timeout);
799 int lnet_sock_read(struct socket *sock, void *buffer, int nob, int timeout);
801 int lnet_sock_listen(struct socket **sockp, __u32 ip, int port, int backlog);
802 int lnet_sock_accept(struct socket **newsockp, struct socket *sock);
803 int lnet_sock_connect(struct socket **sockp, int *fatal,
804 __u32 local_ip, int local_port,
805 __u32 peer_ip, int peer_port);
807 int lnet_peers_start_down(void);
808 int lnet_peer_buffer_credits(struct lnet_net *net);
810 int lnet_router_checker_start(void);
811 void lnet_router_checker_stop(void);
812 void lnet_router_ni_update_locked(struct lnet_peer_ni *gw, __u32 net);
813 void lnet_swap_pinginfo(struct lnet_ping_buffer *pbuf);
815 int lnet_ping_info_validate(struct lnet_ping_info *pinfo);
816 struct lnet_ping_buffer *lnet_ping_buffer_alloc(int nnis, gfp_t gfp);
817 void lnet_ping_buffer_free(struct lnet_ping_buffer *pbuf);
819 static inline void lnet_ping_buffer_addref(struct lnet_ping_buffer *pbuf)
821 atomic_inc(&pbuf->pb_refcnt);
824 static inline void lnet_ping_buffer_decref(struct lnet_ping_buffer *pbuf)
826 if (atomic_dec_and_test(&pbuf->pb_refcnt))
827 lnet_ping_buffer_free(pbuf);
830 static inline int lnet_ping_buffer_numref(struct lnet_ping_buffer *pbuf)
832 return atomic_read(&pbuf->pb_refcnt);
835 static inline int lnet_push_target_resize_needed(void)
837 return the_lnet.ln_push_target->pb_nnis < the_lnet.ln_push_target_nnis;
840 int lnet_push_target_resize(void);
841 void lnet_peer_push_event(struct lnet_event *ev);
843 int lnet_parse_ip2nets(char **networksp, char *ip2nets);
844 int lnet_parse_routes(char *route_str, int *im_a_router);
845 int lnet_parse_networks(struct list_head *nilist, char *networks,
846 bool use_tcp_bonding);
847 bool lnet_net_unique(__u32 net_id, struct list_head *nilist,
848 struct lnet_net **net);
849 bool lnet_ni_unique_net(struct list_head *nilist, char *iface);
850 void lnet_incr_dlc_seq(void);
851 __u32 lnet_get_dlc_seq_locked(void);
853 struct lnet_peer_ni *lnet_get_next_peer_ni_locked(struct lnet_peer *peer,
854 struct lnet_peer_net *peer_net,
855 struct lnet_peer_ni *prev);
856 struct lnet_peer_ni *lnet_nid2peerni_locked(lnet_nid_t nid, lnet_nid_t pref,
858 struct lnet_peer_ni *lnet_nid2peerni_ex(lnet_nid_t nid, int cpt);
859 struct lnet_peer_ni *lnet_find_peer_ni_locked(lnet_nid_t nid);
860 void lnet_peer_net_added(struct lnet_net *net);
861 lnet_nid_t lnet_peer_primary_nid(lnet_nid_t nid);
862 int lnet_discover_peer_locked(struct lnet_peer_ni *lpni, int cpt);
863 int lnet_peer_discovery_start(void);
864 void lnet_peer_discovery_stop(void);
865 void lnet_peer_tables_cleanup(struct lnet_net *net);
866 void lnet_peer_uninit(void);
867 int lnet_peer_tables_create(void);
868 void lnet_debug_peer(lnet_nid_t nid);
869 struct lnet_peer_net *lnet_peer_get_net_locked(struct lnet_peer *peer,
871 bool lnet_peer_is_pref_nid_locked(struct lnet_peer_ni *lpni, lnet_nid_t nid);
872 int lnet_peer_ni_set_non_mr_pref_nid(struct lnet_peer_ni *lpni, lnet_nid_t nid);
873 int lnet_add_peer_ni(lnet_nid_t key_nid, lnet_nid_t nid, bool mr);
874 int lnet_del_peer_ni(lnet_nid_t key_nid, lnet_nid_t nid);
875 int lnet_get_peer_info(__u32 idx, lnet_nid_t *primary_nid, lnet_nid_t *nid,
876 bool *mr, struct lnet_peer_ni_credit_info *peer_ni_info,
877 struct lnet_ioctl_element_stats *peer_ni_stats);
878 int lnet_get_peer_ni_info(__u32 peer_index, __u64 *nid,
879 char alivness[LNET_MAX_STR_LEN],
880 __u32 *cpt_iter, __u32 *refcount,
881 __u32 *ni_peer_tx_credits, __u32 *peer_tx_credits,
882 __u32 *peer_rtr_credits, __u32 *peer_min_rtr_credtis,
883 __u32 *peer_tx_qnob);
887 lnet_is_peer_ni_healthy_locked(struct lnet_peer_ni *lpni)
889 return lpni->lpni_healthy;
893 lnet_set_peer_ni_health_locked(struct lnet_peer_ni *lpni, bool health)
895 lpni->lpni_healthy = health;
899 lnet_is_peer_net_healthy_locked(struct lnet_peer_net *peer_net)
901 struct lnet_peer_ni *lpni;
903 list_for_each_entry(lpni, &peer_net->lpn_peer_nis,
905 if (lnet_is_peer_ni_healthy_locked(lpni))
913 lnet_is_peer_healthy_locked(struct lnet_peer *peer)
915 struct lnet_peer_net *peer_net;
917 list_for_each_entry(peer_net, &peer->lp_peer_nets, lpn_peer_nets) {
918 if (lnet_is_peer_net_healthy_locked(peer_net))
926 lnet_peer_set_alive(struct lnet_peer_ni *lp)
928 lp->lpni_last_alive = lp->lpni_last_query = cfs_time_current();
930 lnet_notify_locked(lp, 0, 1, lp->lpni_last_alive);
934 lnet_peer_is_multi_rail(struct lnet_peer *lp)
936 if (lp->lp_state & LNET_PEER_MULTI_RAIL)
942 lnet_peer_ni_is_configured(struct lnet_peer_ni *lpni)
944 if (lpni->lpni_peer_net->lpn_peer->lp_state & LNET_PEER_CONFIGURED)
950 lnet_peer_ni_is_primary(struct lnet_peer_ni *lpni)
952 return lpni->lpni_nid == lpni->lpni_peer_net->lpn_peer->lp_primary_nid;
955 bool lnet_peer_is_uptodate(struct lnet_peer *lp);
958 lnet_peer_needs_push(struct lnet_peer *lp)
960 if (!(lp->lp_state & LNET_PEER_MULTI_RAIL))
962 if (lp->lp_node_seqno < atomic_read(&the_lnet.ln_ping_target_seqno))