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/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
76 static inline int lnet_is_route_alive(struct lnet_route *route)
78 if (!route->lr_gateway->lpni_alive)
79 return 0; /* gateway is down */
80 if ((route->lr_gateway->lpni_ping_feats &
81 LNET_PING_FEAT_NI_STATUS) == 0)
82 return 1; /* no NI status, assume it's alive */
83 /* has NI status, check # down NIs */
84 return route->lr_downis == 0;
87 static inline int lnet_is_wire_handle_none(struct lnet_handle_wire *wh)
89 return (wh->wh_interface_cookie == LNET_WIRE_HANDLE_COOKIE_NONE &&
90 wh->wh_object_cookie == LNET_WIRE_HANDLE_COOKIE_NONE);
93 static inline int lnet_md_exhausted(struct lnet_libmd *md)
95 return (md->md_threshold == 0 ||
96 ((md->md_options & LNET_MD_MAX_SIZE) != 0 &&
97 md->md_offset + md->md_max_size > md->md_length));
100 static inline int lnet_md_unlinkable(struct lnet_libmd *md)
102 /* Should unlink md when its refcount is 0 and either:
103 * - md has been flagged for deletion (by auto unlink or LNetM[DE]Unlink,
104 * in the latter case md may not be exhausted).
105 * - auto unlink is on and md is exhausted.
107 if (md->md_refcount != 0)
110 if ((md->md_flags & LNET_MD_FLAG_ZOMBIE) != 0)
113 return ((md->md_flags & LNET_MD_FLAG_AUTO_UNLINK) != 0 &&
114 lnet_md_exhausted(md));
117 #define lnet_cpt_table() (the_lnet.ln_cpt_table)
118 #define lnet_cpt_current() cfs_cpt_current(the_lnet.ln_cpt_table, 1)
121 lnet_cpt_of_cookie(__u64 cookie)
123 unsigned int cpt = (cookie >> LNET_COOKIE_TYPE_BITS) & LNET_CPT_MASK;
125 /* LNET_CPT_NUMBER doesn't have to be power2, which means we can
126 * get illegal cpt from it's invalid cookie */
127 return cpt < LNET_CPT_NUMBER ? cpt : cpt % LNET_CPT_NUMBER;
131 lnet_res_lock(int cpt)
133 cfs_percpt_lock(the_lnet.ln_res_lock, cpt);
137 lnet_res_unlock(int cpt)
139 cfs_percpt_unlock(the_lnet.ln_res_lock, cpt);
143 lnet_res_lock_current(void)
145 int cpt = lnet_cpt_current();
152 lnet_net_lock(int cpt)
154 cfs_percpt_lock(the_lnet.ln_net_lock, cpt);
158 lnet_net_unlock(int cpt)
160 cfs_percpt_unlock(the_lnet.ln_net_lock, cpt);
164 lnet_net_lock_current(void)
166 int cpt = lnet_cpt_current();
172 #define LNET_LOCK() lnet_net_lock(LNET_LOCK_EX)
173 #define LNET_UNLOCK() lnet_net_unlock(LNET_LOCK_EX)
175 #define lnet_ptl_lock(ptl) spin_lock(&(ptl)->ptl_lock)
176 #define lnet_ptl_unlock(ptl) spin_unlock(&(ptl)->ptl_lock)
177 #define lnet_eq_wait_lock() spin_lock(&the_lnet.ln_eq_wait_lock)
178 #define lnet_eq_wait_unlock() spin_unlock(&the_lnet.ln_eq_wait_lock)
179 #define lnet_ni_lock(ni) spin_lock(&(ni)->ni_lock)
180 #define lnet_ni_unlock(ni) spin_unlock(&(ni)->ni_lock)
182 #define MAX_PORTALS 64
184 #define LNET_SMALL_MD_SIZE offsetof(struct lnet_libmd, md_iov.iov[1])
185 extern struct kmem_cache *lnet_mes_cachep; /* MEs kmem_cache */
186 extern struct kmem_cache *lnet_small_mds_cachep; /* <= LNET_SMALL_MD_SIZE bytes
189 static inline struct lnet_eq *
194 LIBCFS_ALLOC(eq, sizeof(*eq));
199 lnet_eq_free(struct lnet_eq *eq)
201 LIBCFS_FREE(eq, sizeof(*eq));
204 static inline struct lnet_libmd *
205 lnet_md_alloc(struct lnet_md *umd)
207 struct lnet_libmd *md;
211 if ((umd->options & LNET_MD_KIOV) != 0) {
213 size = offsetof(struct lnet_libmd, md_iov.kiov[niov]);
215 niov = ((umd->options & LNET_MD_IOVEC) != 0) ?
217 size = offsetof(struct lnet_libmd, md_iov.iov[niov]);
220 if (size <= LNET_SMALL_MD_SIZE) {
221 md = kmem_cache_alloc(lnet_small_mds_cachep,
222 GFP_NOFS | __GFP_ZERO);
224 CDEBUG(D_MALLOC, "slab-alloced 'md' of size %u at "
227 CDEBUG(D_MALLOC, "failed to allocate 'md' of size %u\n",
232 LIBCFS_ALLOC(md, size);
236 /* Set here in case of early free */
237 md->md_options = umd->options;
239 INIT_LIST_HEAD(&md->md_list);
246 lnet_md_free(struct lnet_libmd *md)
250 if ((md->md_options & LNET_MD_KIOV) != 0)
251 size = offsetof(struct lnet_libmd, md_iov.kiov[md->md_niov]);
253 size = offsetof(struct lnet_libmd, md_iov.iov[md->md_niov]);
255 if (size <= LNET_SMALL_MD_SIZE) {
256 CDEBUG(D_MALLOC, "slab-freed 'md' at %p.\n", md);
257 kmem_cache_free(lnet_small_mds_cachep, md);
259 LIBCFS_FREE(md, size);
263 static inline struct lnet_me *
268 me = kmem_cache_alloc(lnet_mes_cachep, GFP_NOFS | __GFP_ZERO);
271 CDEBUG(D_MALLOC, "slab-alloced 'me' at %p.\n", me);
273 CDEBUG(D_MALLOC, "failed to allocate 'me'\n");
279 lnet_me_free(struct lnet_me *me)
281 CDEBUG(D_MALLOC, "slab-freed 'me' at %p.\n", me);
282 kmem_cache_free(lnet_mes_cachep, me);
285 struct lnet_libhandle *lnet_res_lh_lookup(struct lnet_res_container *rec,
287 void lnet_res_lh_initialize(struct lnet_res_container *rec,
288 struct lnet_libhandle *lh);
290 lnet_res_lh_invalidate(struct lnet_libhandle *lh)
292 /* ALWAYS called with resource lock held */
293 /* NB: cookie is still useful, don't reset it */
294 list_del(&lh->lh_hash_chain);
298 lnet_eq2handle(struct lnet_handle_eq *handle, struct lnet_eq *eq)
301 LNetInvalidateEQHandle(handle);
305 handle->cookie = eq->eq_lh.lh_cookie;
308 static inline struct lnet_eq *
309 lnet_handle2eq(struct lnet_handle_eq *handle)
311 /* ALWAYS called with resource lock held */
312 struct lnet_libhandle *lh;
314 lh = lnet_res_lh_lookup(&the_lnet.ln_eq_container, handle->cookie);
318 return lh_entry(lh, struct lnet_eq, eq_lh);
322 lnet_md2handle(struct lnet_handle_md *handle, struct lnet_libmd *md)
324 handle->cookie = md->md_lh.lh_cookie;
327 static inline struct lnet_libmd *
328 lnet_handle2md(struct lnet_handle_md *handle)
330 /* ALWAYS called with resource lock held */
331 struct lnet_libhandle *lh;
334 cpt = lnet_cpt_of_cookie(handle->cookie);
335 lh = lnet_res_lh_lookup(the_lnet.ln_md_containers[cpt],
340 return lh_entry(lh, struct lnet_libmd, md_lh);
343 static inline struct lnet_libmd *
344 lnet_wire_handle2md(struct lnet_handle_wire *wh)
346 /* ALWAYS called with resource lock held */
347 struct lnet_libhandle *lh;
350 if (wh->wh_interface_cookie != the_lnet.ln_interface_cookie)
353 cpt = lnet_cpt_of_cookie(wh->wh_object_cookie);
354 lh = lnet_res_lh_lookup(the_lnet.ln_md_containers[cpt],
355 wh->wh_object_cookie);
359 return lh_entry(lh, struct lnet_libmd, md_lh);
363 lnet_me2handle(struct lnet_handle_me *handle, struct lnet_me *me)
365 handle->cookie = me->me_lh.lh_cookie;
368 static inline struct lnet_me *
369 lnet_handle2me(struct lnet_handle_me *handle)
371 /* ALWAYS called with resource lock held */
372 struct lnet_libhandle *lh;
375 cpt = lnet_cpt_of_cookie(handle->cookie);
376 lh = lnet_res_lh_lookup(the_lnet.ln_me_containers[cpt],
381 return lh_entry(lh, struct lnet_me, me_lh);
385 lnet_peer_net_addref_locked(struct lnet_peer_net *lpn)
387 atomic_inc(&lpn->lpn_refcount);
390 extern void lnet_destroy_peer_net_locked(struct lnet_peer_net *lpn);
393 lnet_peer_net_decref_locked(struct lnet_peer_net *lpn)
395 if (atomic_dec_and_test(&lpn->lpn_refcount))
396 lnet_destroy_peer_net_locked(lpn);
400 lnet_peer_addref_locked(struct lnet_peer *lp)
402 atomic_inc(&lp->lp_refcount);
405 extern void lnet_destroy_peer_locked(struct lnet_peer *lp);
408 lnet_peer_decref_locked(struct lnet_peer *lp)
410 if (atomic_dec_and_test(&lp->lp_refcount))
411 lnet_destroy_peer_locked(lp);
415 lnet_peer_ni_addref_locked(struct lnet_peer_ni *lp)
417 LASSERT(atomic_read(&lp->lpni_refcount) > 0);
418 atomic_inc(&lp->lpni_refcount);
421 extern void lnet_destroy_peer_ni_locked(struct lnet_peer_ni *lp);
424 lnet_peer_ni_decref_locked(struct lnet_peer_ni *lp)
426 LASSERT(atomic_read(&lp->lpni_refcount) > 0);
427 if (atomic_dec_and_test(&lp->lpni_refcount))
428 lnet_destroy_peer_ni_locked(lp);
432 lnet_isrouter(struct lnet_peer_ni *lp)
434 return lp->lpni_rtr_refcount != 0;
438 lnet_ni_addref_locked(struct lnet_ni *ni, int cpt)
440 LASSERT(cpt >= 0 && cpt < LNET_CPT_NUMBER);
441 LASSERT(*ni->ni_refs[cpt] >= 0);
443 (*ni->ni_refs[cpt])++;
447 lnet_ni_addref(struct lnet_ni *ni)
450 lnet_ni_addref_locked(ni, 0);
455 lnet_ni_decref_locked(struct lnet_ni *ni, int cpt)
457 LASSERT(cpt >= 0 && cpt < LNET_CPT_NUMBER);
458 LASSERT(*ni->ni_refs[cpt] > 0);
460 (*ni->ni_refs[cpt])--;
464 lnet_ni_decref(struct lnet_ni *ni)
467 lnet_ni_decref_locked(ni, 0);
471 static inline struct lnet_msg *
474 struct lnet_msg *msg;
476 LIBCFS_ALLOC(msg, sizeof(*msg));
478 /* no need to zero, LIBCFS_ALLOC does for us */
483 lnet_msg_free(struct lnet_msg *msg)
485 LASSERT(!msg->msg_onactivelist);
486 LIBCFS_FREE(msg, sizeof(*msg));
489 void lnet_ni_free(struct lnet_ni *ni);
490 void lnet_net_free(struct lnet_net *net);
493 lnet_net_alloc(__u32 net_type, struct list_head *netlist);
496 lnet_ni_alloc(struct lnet_net *net, struct cfs_expr_list *el,
499 lnet_ni_alloc_w_cpt_array(struct lnet_net *net, __u32 *cpts, __u32 ncpts,
503 lnet_nid2peerhash(lnet_nid_t nid)
505 return hash_long(nid, LNET_PEER_HASH_BITS);
508 static inline struct list_head *
509 lnet_net2rnethash(__u32 net)
511 return &the_lnet.ln_remote_nets_hash[(LNET_NETNUM(net) +
513 ((1U << the_lnet.ln_remote_nets_hbits) - 1)];
516 extern struct lnet_lnd the_lolnd;
517 extern int avoid_asym_router_failure;
519 extern unsigned int lnet_nid_cpt_hash(lnet_nid_t nid, unsigned int number);
520 extern int lnet_cpt_of_nid_locked(lnet_nid_t nid, struct lnet_ni *ni);
521 extern int lnet_cpt_of_nid(lnet_nid_t nid, struct lnet_ni *ni);
522 extern struct lnet_ni *lnet_nid2ni_locked(lnet_nid_t nid, int cpt);
523 extern struct lnet_ni *lnet_nid2ni_addref(lnet_nid_t nid);
524 extern struct lnet_ni *lnet_net2ni_locked(__u32 net, int cpt);
525 extern struct lnet_ni *lnet_net2ni_addref(__u32 net);
526 bool lnet_is_ni_healthy_locked(struct lnet_ni *ni);
527 struct lnet_net *lnet_get_net_locked(__u32 net_id);
529 int lnet_lib_init(void);
530 void lnet_lib_exit(void);
532 extern unsigned int lnet_numa_range;
533 extern unsigned int lnet_peer_discovery_disabled;
534 extern int portal_rotor;
536 int lnet_notify(struct lnet_ni *ni, lnet_nid_t peer, int alive,
538 void lnet_notify_locked(struct lnet_peer_ni *lp, int notifylnd, int alive,
540 int lnet_add_route(__u32 net, __u32 hops, lnet_nid_t gateway_nid,
541 unsigned int priority);
542 int lnet_check_routes(void);
543 int lnet_del_route(__u32 net, lnet_nid_t gw_nid);
544 void lnet_destroy_routes(void);
545 int lnet_get_route(int idx, __u32 *net, __u32 *hops,
546 lnet_nid_t *gateway, __u32 *alive, __u32 *priority);
547 int lnet_get_rtr_pool_cfg(int idx, struct lnet_ioctl_pool_cfg *pool_cfg);
548 struct lnet_ni *lnet_get_next_ni_locked(struct lnet_net *mynet,
549 struct lnet_ni *prev);
550 struct lnet_ni *lnet_get_ni_idx_locked(int idx);
552 struct libcfs_ioctl_handler {
553 struct list_head item;
554 int (*handle_ioctl)(unsigned int cmd, struct libcfs_ioctl_hdr *hdr);
557 #define DECLARE_IOCTL_HANDLER(ident, func) \
558 static struct libcfs_ioctl_handler ident = { \
559 .item = LIST_HEAD_INIT(ident.item), \
560 .handle_ioctl = func \
563 extern int libcfs_register_ioctl(struct libcfs_ioctl_handler *hand);
564 extern int libcfs_deregister_ioctl(struct libcfs_ioctl_handler *hand);
565 extern int libcfs_ioctl_getdata(struct libcfs_ioctl_hdr **hdr_pp,
566 struct libcfs_ioctl_hdr __user *uparam);
568 void lnet_proc_init(void);
569 void lnet_proc_fini(void);
570 int lnet_rtrpools_alloc(int im_a_router);
571 void lnet_destroy_rtrbuf(struct lnet_rtrbuf *rb, int npages);
572 int lnet_rtrpools_adjust(int tiny, int small, int large);
573 int lnet_rtrpools_enable(void);
574 void lnet_rtrpools_disable(void);
575 void lnet_rtrpools_free(int keep_pools);
576 struct lnet_remotenet *lnet_find_rnet_locked(__u32 net);
577 int lnet_dyn_add_net(struct lnet_ioctl_config_data *conf);
578 int lnet_dyn_del_net(__u32 net);
579 int lnet_dyn_add_ni(struct lnet_ioctl_config_ni *conf);
580 int lnet_dyn_del_ni(struct lnet_ioctl_config_ni *conf);
581 int lnet_clear_lazy_portal(struct lnet_ni *ni, int portal, char *reason);
582 struct lnet_net *lnet_get_net_locked(__u32 net_id);
584 int lnet_islocalnid(lnet_nid_t nid);
585 int lnet_islocalnet(__u32 net);
587 void lnet_msg_attach_md(struct lnet_msg *msg, struct lnet_libmd *md,
588 unsigned int offset, unsigned int mlen);
589 void lnet_msg_detach_md(struct lnet_msg *msg, int status);
590 void lnet_build_unlink_event(struct lnet_libmd *md, struct lnet_event *ev);
591 void lnet_build_msg_event(struct lnet_msg *msg, enum lnet_event_kind ev_type);
592 void lnet_msg_commit(struct lnet_msg *msg, int cpt);
593 void lnet_msg_decommit(struct lnet_msg *msg, int cpt, int status);
595 void lnet_eq_enqueue_event(struct lnet_eq *eq, struct lnet_event *ev);
596 void lnet_prep_send(struct lnet_msg *msg, int type,
597 struct lnet_process_id target, unsigned int offset,
599 int lnet_send(lnet_nid_t nid, struct lnet_msg *msg, lnet_nid_t rtr_nid);
600 void lnet_return_tx_credits_locked(struct lnet_msg *msg);
601 void lnet_return_rx_credits_locked(struct lnet_msg *msg);
602 void lnet_schedule_blocked_locked(struct lnet_rtrbufpool *rbp);
603 void lnet_drop_routed_msgs_locked(struct list_head *list, int cpt);
605 /* portals functions */
606 /* portals attributes */
608 lnet_ptl_is_lazy(struct lnet_portal *ptl)
610 return !!(ptl->ptl_options & LNET_PTL_LAZY);
614 lnet_ptl_is_unique(struct lnet_portal *ptl)
616 return !!(ptl->ptl_options & LNET_PTL_MATCH_UNIQUE);
620 lnet_ptl_is_wildcard(struct lnet_portal *ptl)
622 return !!(ptl->ptl_options & LNET_PTL_MATCH_WILDCARD);
626 lnet_ptl_setopt(struct lnet_portal *ptl, int opt)
628 ptl->ptl_options |= opt;
632 lnet_ptl_unsetopt(struct lnet_portal *ptl, int opt)
634 ptl->ptl_options &= ~opt;
637 /* match-table functions */
638 struct list_head *lnet_mt_match_head(struct lnet_match_table *mtable,
639 struct lnet_process_id id, __u64 mbits);
640 struct lnet_match_table *lnet_mt_of_attach(unsigned int index,
641 struct lnet_process_id id,
642 __u64 mbits, __u64 ignore_bits,
643 enum lnet_ins_pos pos);
644 int lnet_mt_match_md(struct lnet_match_table *mtable,
645 struct lnet_match_info *info, struct lnet_msg *msg);
647 /* portals match/attach functions */
648 void lnet_ptl_attach_md(struct lnet_me *me, struct lnet_libmd *md,
649 struct list_head *matches, struct list_head *drops);
650 void lnet_ptl_detach_md(struct lnet_me *me, struct lnet_libmd *md);
651 int lnet_ptl_match_md(struct lnet_match_info *info, struct lnet_msg *msg);
653 /* initialized and finalize portals */
654 int lnet_portals_create(void);
655 void lnet_portals_destroy(void);
657 /* message functions */
658 int lnet_parse(struct lnet_ni *ni, struct lnet_hdr *hdr,
659 lnet_nid_t fromnid, void *private, int rdma_req);
660 int lnet_parse_local(struct lnet_ni *ni, struct lnet_msg *msg);
661 int lnet_parse_forward_locked(struct lnet_ni *ni, struct lnet_msg *msg);
663 void lnet_recv(struct lnet_ni *ni, void *private, struct lnet_msg *msg,
664 int delayed, unsigned int offset, unsigned int mlen,
666 void lnet_ni_recv(struct lnet_ni *ni, void *private, struct lnet_msg *msg,
667 int delayed, unsigned int offset,
668 unsigned int mlen, unsigned int rlen);
670 struct lnet_msg *lnet_create_reply_msg(struct lnet_ni *ni,
671 struct lnet_msg *get_msg);
672 void lnet_set_reply_msg_len(struct lnet_ni *ni, struct lnet_msg *msg,
675 void lnet_finalize(struct lnet_msg *msg, int rc);
677 void lnet_drop_message(struct lnet_ni *ni, int cpt, void *private,
679 void lnet_drop_delayed_msg_list(struct list_head *head, char *reason);
680 void lnet_recv_delayed_msg_list(struct list_head *head);
682 int lnet_msg_container_setup(struct lnet_msg_container *container, int cpt);
683 void lnet_msg_container_cleanup(struct lnet_msg_container *container);
684 void lnet_msg_containers_destroy(void);
685 int lnet_msg_containers_create(void);
687 char *lnet_msgtyp2str(int type);
688 void lnet_print_hdr(struct lnet_hdr *hdr);
689 int lnet_fail_nid(lnet_nid_t nid, unsigned int threshold);
691 /** \addtogroup lnet_fault_simulation @{ */
693 int lnet_fault_ctl(int cmd, struct libcfs_ioctl_data *data);
694 int lnet_fault_init(void);
695 void lnet_fault_fini(void);
697 bool lnet_drop_rule_match(struct lnet_hdr *hdr);
699 int lnet_delay_rule_add(struct lnet_fault_attr *attr);
700 int lnet_delay_rule_del(lnet_nid_t src, lnet_nid_t dst, bool shutdown);
701 int lnet_delay_rule_list(int pos, struct lnet_fault_attr *attr,
702 struct lnet_fault_stat *stat);
703 void lnet_delay_rule_reset(void);
704 void lnet_delay_rule_check(void);
705 bool lnet_delay_rule_match_locked(struct lnet_hdr *hdr, struct lnet_msg *msg);
707 /** @} lnet_fault_simulation */
709 void lnet_counters_get(struct lnet_counters *counters);
710 void lnet_counters_reset(void);
712 unsigned int lnet_iov_nob(unsigned int niov, struct kvec *iov);
713 int lnet_extract_iov(int dst_niov, struct kvec *dst,
714 int src_niov, struct kvec *src,
715 unsigned int offset, unsigned int len);
717 unsigned int lnet_kiov_nob (unsigned int niov, lnet_kiov_t *iov);
718 int lnet_extract_kiov(int dst_niov, lnet_kiov_t *dst,
719 int src_niov, lnet_kiov_t *src,
720 unsigned int offset, unsigned int len);
722 void lnet_copy_iov2iov(unsigned int ndiov, struct kvec *diov,
723 unsigned int doffset,
724 unsigned int nsiov, struct kvec *siov,
725 unsigned int soffset, unsigned int nob);
726 void lnet_copy_kiov2iov(unsigned int niov, struct kvec *iov,
727 unsigned int iovoffset,
728 unsigned int nkiov, lnet_kiov_t *kiov,
729 unsigned int kiovoffset, unsigned int nob);
730 void lnet_copy_iov2kiov(unsigned int nkiov, lnet_kiov_t *kiov,
731 unsigned int kiovoffset,
732 unsigned int niov, struct kvec *iov,
733 unsigned int iovoffset, unsigned int nob);
734 void lnet_copy_kiov2kiov(unsigned int ndkiov, lnet_kiov_t *dkiov,
735 unsigned int doffset,
736 unsigned int nskiov, lnet_kiov_t *skiov,
737 unsigned int soffset, unsigned int nob);
740 lnet_copy_iov2flat(int dlen, void *dest, unsigned int doffset,
741 unsigned int nsiov, struct kvec *siov, unsigned int soffset,
744 struct kvec diov = { .iov_base = dest, .iov_len = dlen };
746 lnet_copy_iov2iov(1, &diov, doffset,
747 nsiov, siov, soffset, nob);
751 lnet_copy_kiov2flat(int dlen, void *dest, unsigned int doffset,
752 unsigned int nsiov, lnet_kiov_t *skiov,
753 unsigned int soffset, unsigned int nob)
755 struct kvec diov = { .iov_base = dest, .iov_len = dlen };
757 lnet_copy_kiov2iov(1, &diov, doffset,
758 nsiov, skiov, soffset, nob);
762 lnet_copy_flat2iov(unsigned int ndiov, struct kvec *diov, unsigned int doffset,
763 int slen, void *src, unsigned int soffset,
766 struct kvec siov = { .iov_base = src, .iov_len = slen };
767 lnet_copy_iov2iov(ndiov, diov, doffset,
768 1, &siov, soffset, nob);
772 lnet_copy_flat2kiov(unsigned int ndiov, lnet_kiov_t *dkiov,
773 unsigned int doffset, int slen, void *src,
774 unsigned int soffset, unsigned int nob)
776 struct kvec siov = { .iov_base = src, .iov_len = slen };
777 lnet_copy_iov2kiov(ndiov, dkiov, doffset,
778 1, &siov, soffset, nob);
781 void lnet_me_unlink(struct lnet_me *me);
783 void lnet_md_unlink(struct lnet_libmd *md);
784 void lnet_md_deconstruct(struct lnet_libmd *lmd, struct lnet_md *umd);
785 struct page *lnet_kvaddr_to_page(unsigned long vaddr);
786 int lnet_cpt_of_md(struct lnet_libmd *md, unsigned int offset);
788 void lnet_register_lnd(struct lnet_lnd *lnd);
789 void lnet_unregister_lnd(struct lnet_lnd *lnd);
791 int lnet_connect(struct socket **sockp, lnet_nid_t peer_nid,
792 __u32 local_ip, __u32 peer_ip, int peer_port);
793 void lnet_connect_console_error(int rc, lnet_nid_t peer_nid,
794 __u32 peer_ip, int port);
795 int lnet_count_acceptor_nets(void);
796 int lnet_acceptor_timeout(void);
797 int lnet_acceptor_port(void);
798 int lnet_acceptor_start(void);
799 void lnet_acceptor_stop(void);
801 int lnet_ipif_query(char *name, int *up, __u32 *ip, __u32 *mask);
802 int lnet_ipif_enumerate(char ***names);
803 void lnet_ipif_free_enumeration(char **names, int n);
804 int lnet_sock_setbuf(struct socket *socket, int txbufsize, int rxbufsize);
805 int lnet_sock_getbuf(struct socket *socket, int *txbufsize, int *rxbufsize);
806 int lnet_sock_getaddr(struct socket *socket, bool remote, __u32 *ip, int *port);
807 int lnet_sock_write(struct socket *sock, void *buffer, int nob, int timeout);
808 int lnet_sock_read(struct socket *sock, void *buffer, int nob, int timeout);
810 int lnet_sock_listen(struct socket **sockp, __u32 ip, int port, int backlog);
811 int lnet_sock_accept(struct socket **newsockp, struct socket *sock);
812 int lnet_sock_connect(struct socket **sockp, int *fatal,
813 __u32 local_ip, int local_port,
814 __u32 peer_ip, int peer_port);
816 int lnet_peers_start_down(void);
817 int lnet_peer_buffer_credits(struct lnet_net *net);
819 int lnet_router_checker_start(void);
820 void lnet_router_checker_stop(void);
821 void lnet_router_ni_update_locked(struct lnet_peer_ni *gw, __u32 net);
822 void lnet_swap_pinginfo(struct lnet_ping_buffer *pbuf);
824 int lnet_ping_info_validate(struct lnet_ping_info *pinfo);
825 struct lnet_ping_buffer *lnet_ping_buffer_alloc(int nnis, gfp_t gfp);
826 void lnet_ping_buffer_free(struct lnet_ping_buffer *pbuf);
828 static inline void lnet_ping_buffer_addref(struct lnet_ping_buffer *pbuf)
830 atomic_inc(&pbuf->pb_refcnt);
833 static inline void lnet_ping_buffer_decref(struct lnet_ping_buffer *pbuf)
835 if (atomic_dec_and_test(&pbuf->pb_refcnt))
836 lnet_ping_buffer_free(pbuf);
839 static inline int lnet_ping_buffer_numref(struct lnet_ping_buffer *pbuf)
841 return atomic_read(&pbuf->pb_refcnt);
844 int lnet_parse_ip2nets(char **networksp, char *ip2nets);
845 int lnet_parse_routes(char *route_str, int *im_a_router);
846 int lnet_parse_networks(struct list_head *nilist, char *networks,
847 bool use_tcp_bonding);
848 bool lnet_net_unique(__u32 net_id, struct list_head *nilist,
849 struct lnet_net **net);
850 bool lnet_ni_unique_net(struct list_head *nilist, char *iface);
851 void lnet_incr_dlc_seq(void);
852 __u32 lnet_get_dlc_seq_locked(void);
854 struct lnet_peer_ni *lnet_get_next_peer_ni_locked(struct lnet_peer *peer,
855 struct lnet_peer_net *peer_net,
856 struct lnet_peer_ni *prev);
857 struct lnet_peer_ni *lnet_nid2peerni_locked(lnet_nid_t nid, lnet_nid_t pref,
859 struct lnet_peer_ni *lnet_nid2peerni_ex(lnet_nid_t nid, int cpt);
860 struct lnet_peer_ni *lnet_find_peer_ni_locked(lnet_nid_t nid);
861 void lnet_peer_net_added(struct lnet_net *net);
862 lnet_nid_t lnet_peer_primary_nid_locked(lnet_nid_t nid);
863 int lnet_discover_peer_locked(struct lnet_peer_ni *lpni, int cpt);
864 int lnet_peer_discovery_start(void);
865 void lnet_peer_discovery_stop(void);
866 void lnet_peer_tables_cleanup(struct lnet_net *net);
867 void lnet_peer_uninit(void);
868 int lnet_peer_tables_create(void);
869 void lnet_debug_peer(lnet_nid_t nid);
870 struct lnet_peer_net *lnet_peer_get_net_locked(struct lnet_peer *peer,
872 bool lnet_peer_is_pref_nid_locked(struct lnet_peer_ni *lpni, lnet_nid_t nid);
873 int lnet_peer_ni_set_non_mr_pref_nid(struct lnet_peer_ni *lpni, lnet_nid_t nid);
874 int lnet_add_peer_ni(lnet_nid_t key_nid, lnet_nid_t nid, bool mr);
875 int lnet_del_peer_ni(lnet_nid_t key_nid, lnet_nid_t nid);
876 int lnet_get_peer_info(__u32 idx, lnet_nid_t *primary_nid, lnet_nid_t *nid,
878 struct lnet_peer_ni_credit_info __user *peer_ni_info,
879 struct lnet_ioctl_element_stats __user *peer_ni_stats);
880 int lnet_get_peer_ni_info(__u32 peer_index, __u64 *nid,
881 char alivness[LNET_MAX_STR_LEN],
882 __u32 *cpt_iter, __u32 *refcount,
883 __u32 *ni_peer_tx_credits, __u32 *peer_tx_credits,
884 __u32 *peer_rtr_credits, __u32 *peer_min_rtr_credtis,
885 __u32 *peer_tx_qnob);
889 lnet_is_peer_ni_healthy_locked(struct lnet_peer_ni *lpni)
891 return lpni->lpni_healthy;
895 lnet_set_peer_ni_health_locked(struct lnet_peer_ni *lpni, bool health)
897 lpni->lpni_healthy = health;
901 lnet_is_peer_net_healthy_locked(struct lnet_peer_net *peer_net)
903 struct lnet_peer_ni *lpni;
905 list_for_each_entry(lpni, &peer_net->lpn_peer_nis,
907 if (lnet_is_peer_ni_healthy_locked(lpni))
915 lnet_is_peer_healthy_locked(struct lnet_peer *peer)
917 struct lnet_peer_net *peer_net;
919 list_for_each_entry(peer_net, &peer->lp_peer_nets, lpn_peer_nets) {
920 if (lnet_is_peer_net_healthy_locked(peer_net))
928 lnet_peer_set_alive(struct lnet_peer_ni *lp)
930 lp->lpni_last_alive = lp->lpni_last_query = cfs_time_current();
932 lnet_notify_locked(lp, 0, 1, lp->lpni_last_alive);
936 lnet_peer_is_multi_rail(struct lnet_peer *lp)
938 if (lp->lp_state & LNET_PEER_MULTI_RAIL)
944 lnet_peer_ni_is_configured(struct lnet_peer_ni *lpni)
946 if (lpni->lpni_peer_net->lpn_peer->lp_state & LNET_PEER_CONFIGURED)
952 lnet_peer_ni_is_primary(struct lnet_peer_ni *lpni)
954 return lpni->lpni_nid == lpni->lpni_peer_net->lpn_peer->lp_primary_nid;
957 bool lnet_peer_is_uptodate(struct lnet_peer *lp);