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 #define CFS_FAIL_PTLRPC_OST_BULK_CB2 0xe000
44 # error This include is only for kernel use.
47 #include <libcfs/libcfs.h>
49 #include <lnet/lib-types.h>
50 #include <uapi/linux/lnet/lnet-dlc.h>
51 #include <uapi/linux/lnet/lnet-types.h>
52 #include <uapi/linux/lnet/lnetctl.h>
53 #include <uapi/linux/lnet/nidstr.h>
55 extern struct lnet the_lnet; /* THE network */
57 #if (BITS_PER_LONG == 32)
58 /* 2 CPTs, allowing more CPTs might make us under memory pressure */
59 # define LNET_CPT_MAX_BITS 1
61 #else /* 64-bit system */
63 * 256 CPTs for thousands of CPUs, allowing more CPTs might make us
64 * under risk of consuming all lh_cookie.
66 # define LNET_CPT_MAX_BITS 8
67 #endif /* BITS_PER_LONG == 32 */
69 /* max allowed CPT number */
70 #define LNET_CPT_MAX (1 << LNET_CPT_MAX_BITS)
72 #define LNET_CPT_NUMBER (the_lnet.ln_cpt_number)
73 #define LNET_CPT_BITS (the_lnet.ln_cpt_bits)
74 #define LNET_CPT_MASK ((1ULL << LNET_CPT_BITS) - 1)
77 #define LNET_LOCK_EX CFS_PERCPT_LOCK_EX
80 #define DEFAULT_PEER_TIMEOUT 180
81 #define LNET_LND_DEFAULT_TIMEOUT 5
83 #ifdef HAVE_KERN_SOCK_GETNAME_2ARGS
84 #define lnet_kernel_getpeername(sock, addr, addrlen) \
85 kernel_getpeername(sock, addr)
86 #define lnet_kernel_getsockname(sock, addr, addrlen) \
87 kernel_getsockname(sock, addr)
89 #define lnet_kernel_getpeername(sock, addr, addrlen) \
90 kernel_getpeername(sock, addr, addrlen)
91 #define lnet_kernel_getsockname(sock, addr, addrlen) \
92 kernel_getsockname(sock, addr, addrlen)
95 bool lnet_is_route_alive(struct lnet_route *route);
96 bool lnet_is_gateway_alive(struct lnet_peer *gw);
98 static inline int lnet_is_wire_handle_none(struct lnet_handle_wire *wh)
100 return (wh->wh_interface_cookie == LNET_WIRE_HANDLE_COOKIE_NONE &&
101 wh->wh_object_cookie == LNET_WIRE_HANDLE_COOKIE_NONE);
104 static inline int lnet_md_exhausted(struct lnet_libmd *md)
106 return (md->md_threshold == 0 ||
107 ((md->md_options & LNET_MD_MAX_SIZE) != 0 &&
108 md->md_offset + md->md_max_size > md->md_length));
111 static inline int lnet_md_unlinkable(struct lnet_libmd *md)
113 /* Should unlink md when its refcount is 0 and either:
114 * - md has been flagged for deletion (by auto unlink or LNetM[DE]Unlink,
115 * in the latter case md may not be exhausted).
116 * - auto unlink is on and md is exhausted.
118 if (md->md_refcount != 0)
121 if ((md->md_flags & LNET_MD_FLAG_ZOMBIE) != 0)
124 return ((md->md_flags & LNET_MD_FLAG_AUTO_UNLINK) != 0 &&
125 lnet_md_exhausted(md));
128 #define lnet_cpt_table() (the_lnet.ln_cpt_table)
129 #define lnet_cpt_current() cfs_cpt_current(the_lnet.ln_cpt_table, 1)
132 lnet_cpt_of_cookie(__u64 cookie)
134 unsigned int cpt = (cookie >> LNET_COOKIE_TYPE_BITS) & LNET_CPT_MASK;
136 /* LNET_CPT_NUMBER doesn't have to be power2, which means we can
137 * get illegal cpt from it's invalid cookie */
138 return cpt < LNET_CPT_NUMBER ? cpt : cpt % LNET_CPT_NUMBER;
142 lnet_res_lock(int cpt)
144 cfs_percpt_lock(the_lnet.ln_res_lock, cpt);
148 lnet_res_unlock(int cpt)
150 cfs_percpt_unlock(the_lnet.ln_res_lock, cpt);
154 lnet_res_lock_current(void)
156 int cpt = lnet_cpt_current();
163 lnet_net_lock(int cpt)
165 cfs_percpt_lock(the_lnet.ln_net_lock, cpt);
169 lnet_net_unlock(int cpt)
171 cfs_percpt_unlock(the_lnet.ln_net_lock, cpt);
175 lnet_net_lock_current(void)
177 int cpt = lnet_cpt_current();
183 #define LNET_LOCK() lnet_net_lock(LNET_LOCK_EX)
184 #define LNET_UNLOCK() lnet_net_unlock(LNET_LOCK_EX)
186 #define lnet_ptl_lock(ptl) spin_lock(&(ptl)->ptl_lock)
187 #define lnet_ptl_unlock(ptl) spin_unlock(&(ptl)->ptl_lock)
188 #define lnet_eq_wait_lock() spin_lock(&the_lnet.ln_eq_wait_lock)
189 #define lnet_eq_wait_unlock() spin_unlock(&the_lnet.ln_eq_wait_lock)
190 #define lnet_ni_lock(ni) spin_lock(&(ni)->ni_lock)
191 #define lnet_ni_unlock(ni) spin_unlock(&(ni)->ni_lock)
193 #define MAX_PORTALS 64
195 #define LNET_SMALL_MD_SIZE offsetof(struct lnet_libmd, md_iov.iov[1])
196 extern struct kmem_cache *lnet_mes_cachep; /* MEs kmem_cache */
197 extern struct kmem_cache *lnet_small_mds_cachep; /* <= LNET_SMALL_MD_SIZE bytes
200 static inline struct lnet_eq *
205 LIBCFS_ALLOC(eq, sizeof(*eq));
210 lnet_eq_free(struct lnet_eq *eq)
212 LIBCFS_FREE(eq, sizeof(*eq));
215 static inline struct lnet_libmd *
216 lnet_md_alloc(struct lnet_md *umd)
218 struct lnet_libmd *md;
222 if ((umd->options & LNET_MD_KIOV) != 0) {
224 size = offsetof(struct lnet_libmd, md_iov.kiov[niov]);
226 niov = ((umd->options & LNET_MD_IOVEC) != 0) ?
228 size = offsetof(struct lnet_libmd, md_iov.iov[niov]);
231 if (size <= LNET_SMALL_MD_SIZE) {
232 md = kmem_cache_alloc(lnet_small_mds_cachep,
233 GFP_NOFS | __GFP_ZERO);
235 CDEBUG(D_MALLOC, "slab-alloced 'md' of size %u at "
238 CDEBUG(D_MALLOC, "failed to allocate 'md' of size %u\n",
243 LIBCFS_ALLOC(md, size);
247 /* Set here in case of early free */
248 md->md_options = umd->options;
250 INIT_LIST_HEAD(&md->md_list);
257 lnet_md_free(struct lnet_libmd *md)
261 if ((md->md_options & LNET_MD_KIOV) != 0)
262 size = offsetof(struct lnet_libmd, md_iov.kiov[md->md_niov]);
264 size = offsetof(struct lnet_libmd, md_iov.iov[md->md_niov]);
266 if (size <= LNET_SMALL_MD_SIZE) {
267 CDEBUG(D_MALLOC, "slab-freed 'md' at %p.\n", md);
268 kmem_cache_free(lnet_small_mds_cachep, md);
270 LIBCFS_FREE(md, size);
274 static inline struct lnet_me *
279 me = kmem_cache_alloc(lnet_mes_cachep, GFP_NOFS | __GFP_ZERO);
282 CDEBUG(D_MALLOC, "slab-alloced 'me' at %p.\n", me);
284 CDEBUG(D_MALLOC, "failed to allocate 'me'\n");
290 lnet_me_free(struct lnet_me *me)
292 CDEBUG(D_MALLOC, "slab-freed 'me' at %p.\n", me);
293 kmem_cache_free(lnet_mes_cachep, me);
296 struct lnet_libhandle *lnet_res_lh_lookup(struct lnet_res_container *rec,
298 void lnet_res_lh_initialize(struct lnet_res_container *rec,
299 struct lnet_libhandle *lh);
301 lnet_res_lh_invalidate(struct lnet_libhandle *lh)
303 /* ALWAYS called with resource lock held */
304 /* NB: cookie is still useful, don't reset it */
305 list_del(&lh->lh_hash_chain);
309 lnet_eq2handle(struct lnet_handle_eq *handle, struct lnet_eq *eq)
312 LNetInvalidateEQHandle(handle);
316 handle->cookie = eq->eq_lh.lh_cookie;
319 static inline struct lnet_eq *
320 lnet_handle2eq(struct lnet_handle_eq *handle)
322 /* ALWAYS called with resource lock held */
323 struct lnet_libhandle *lh;
325 lh = lnet_res_lh_lookup(&the_lnet.ln_eq_container, handle->cookie);
329 return lh_entry(lh, struct lnet_eq, eq_lh);
333 lnet_md2handle(struct lnet_handle_md *handle, struct lnet_libmd *md)
335 handle->cookie = md->md_lh.lh_cookie;
338 static inline struct lnet_libmd *
339 lnet_handle2md(struct lnet_handle_md *handle)
341 /* ALWAYS called with resource lock held */
342 struct lnet_libhandle *lh;
345 cpt = lnet_cpt_of_cookie(handle->cookie);
346 lh = lnet_res_lh_lookup(the_lnet.ln_md_containers[cpt],
351 return lh_entry(lh, struct lnet_libmd, md_lh);
354 static inline struct lnet_libmd *
355 lnet_wire_handle2md(struct lnet_handle_wire *wh)
357 /* ALWAYS called with resource lock held */
358 struct lnet_libhandle *lh;
361 if (wh->wh_interface_cookie != the_lnet.ln_interface_cookie)
364 cpt = lnet_cpt_of_cookie(wh->wh_object_cookie);
365 lh = lnet_res_lh_lookup(the_lnet.ln_md_containers[cpt],
366 wh->wh_object_cookie);
370 return lh_entry(lh, struct lnet_libmd, md_lh);
374 lnet_me2handle(struct lnet_handle_me *handle, struct lnet_me *me)
376 handle->cookie = me->me_lh.lh_cookie;
379 static inline struct lnet_me *
380 lnet_handle2me(struct lnet_handle_me *handle)
382 /* ALWAYS called with resource lock held */
383 struct lnet_libhandle *lh;
386 cpt = lnet_cpt_of_cookie(handle->cookie);
387 lh = lnet_res_lh_lookup(the_lnet.ln_me_containers[cpt],
392 return lh_entry(lh, struct lnet_me, me_lh);
396 lnet_peer_net_addref_locked(struct lnet_peer_net *lpn)
398 atomic_inc(&lpn->lpn_refcount);
401 extern void lnet_destroy_peer_net_locked(struct lnet_peer_net *lpn);
404 lnet_peer_net_decref_locked(struct lnet_peer_net *lpn)
406 if (atomic_dec_and_test(&lpn->lpn_refcount))
407 lnet_destroy_peer_net_locked(lpn);
411 lnet_peer_addref_locked(struct lnet_peer *lp)
413 atomic_inc(&lp->lp_refcount);
416 extern void lnet_destroy_peer_locked(struct lnet_peer *lp);
419 lnet_peer_decref_locked(struct lnet_peer *lp)
421 if (atomic_dec_and_test(&lp->lp_refcount))
422 lnet_destroy_peer_locked(lp);
426 lnet_peer_ni_addref_locked(struct lnet_peer_ni *lp)
428 LASSERT(atomic_read(&lp->lpni_refcount) > 0);
429 atomic_inc(&lp->lpni_refcount);
432 extern void lnet_destroy_peer_ni_locked(struct lnet_peer_ni *lp);
435 lnet_peer_ni_decref_locked(struct lnet_peer_ni *lp)
437 LASSERT(atomic_read(&lp->lpni_refcount) > 0);
438 if (atomic_dec_and_test(&lp->lpni_refcount))
439 lnet_destroy_peer_ni_locked(lp);
443 lnet_isrouter(struct lnet_peer_ni *lpni)
445 return lpni->lpni_peer_net->lpn_peer->lp_rtr_refcount != 0;
449 lnet_ni_addref_locked(struct lnet_ni *ni, int cpt)
451 LASSERT(cpt >= 0 && cpt < LNET_CPT_NUMBER);
452 LASSERT(*ni->ni_refs[cpt] >= 0);
454 (*ni->ni_refs[cpt])++;
458 lnet_ni_addref(struct lnet_ni *ni)
461 lnet_ni_addref_locked(ni, 0);
466 lnet_ni_decref_locked(struct lnet_ni *ni, int cpt)
468 LASSERT(cpt >= 0 && cpt < LNET_CPT_NUMBER);
469 LASSERT(*ni->ni_refs[cpt] > 0);
471 (*ni->ni_refs[cpt])--;
475 lnet_ni_decref(struct lnet_ni *ni)
478 lnet_ni_decref_locked(ni, 0);
482 static inline struct lnet_msg *
485 struct lnet_msg *msg;
487 LIBCFS_ALLOC(msg, sizeof(*msg));
489 /* no need to zero, LIBCFS_ALLOC does for us */
494 lnet_msg_free(struct lnet_msg *msg)
496 LASSERT(!msg->msg_onactivelist);
497 LIBCFS_FREE(msg, sizeof(*msg));
500 static inline struct lnet_rsp_tracker *
501 lnet_rspt_alloc(int cpt)
503 struct lnet_rsp_tracker *rspt;
504 LIBCFS_ALLOC(rspt, sizeof(*rspt));
506 the_lnet.ln_counters[cpt]->lct_health.lch_rst_alloc++;
507 lnet_net_unlock(cpt);
512 lnet_rspt_free(struct lnet_rsp_tracker *rspt, int cpt)
514 LIBCFS_FREE(rspt, sizeof(*rspt));
516 the_lnet.ln_counters[cpt]->lct_health.lch_rst_alloc--;
517 lnet_net_unlock(cpt);
520 void lnet_ni_free(struct lnet_ni *ni);
521 void lnet_net_free(struct lnet_net *net);
524 lnet_net_alloc(__u32 net_type, struct list_head *netlist);
527 lnet_ni_alloc(struct lnet_net *net, struct cfs_expr_list *el,
530 lnet_ni_alloc_w_cpt_array(struct lnet_net *net, __u32 *cpts, __u32 ncpts,
534 lnet_nid2peerhash(lnet_nid_t nid)
536 return hash_long(nid, LNET_PEER_HASH_BITS);
539 static inline struct list_head *
540 lnet_net2rnethash(__u32 net)
542 return &the_lnet.ln_remote_nets_hash[(LNET_NETNUM(net) +
544 ((1U << the_lnet.ln_remote_nets_hbits) - 1)];
547 extern struct lnet_lnd the_lolnd;
548 extern int avoid_asym_router_failure;
550 extern unsigned int lnet_nid_cpt_hash(lnet_nid_t nid, unsigned int number);
551 extern int lnet_cpt_of_nid_locked(lnet_nid_t nid, struct lnet_ni *ni);
552 extern int lnet_cpt_of_nid(lnet_nid_t nid, struct lnet_ni *ni);
553 extern struct lnet_ni *lnet_nid2ni_locked(lnet_nid_t nid, int cpt);
554 extern struct lnet_ni *lnet_nid2ni_addref(lnet_nid_t nid);
555 extern struct lnet_ni *lnet_net2ni_locked(__u32 net, int cpt);
556 extern struct lnet_ni *lnet_net2ni_addref(__u32 net);
557 struct lnet_net *lnet_get_net_locked(__u32 net_id);
559 int lnet_lib_init(void);
560 void lnet_lib_exit(void);
562 extern unsigned lnet_transaction_timeout;
563 extern unsigned lnet_retry_count;
564 extern unsigned int lnet_numa_range;
565 extern unsigned int lnet_health_sensitivity;
566 extern unsigned int lnet_recovery_interval;
567 extern unsigned int lnet_peer_discovery_disabled;
568 extern unsigned int lnet_drop_asym_route;
569 extern unsigned int router_sensitivity_percentage;
570 extern int alive_router_check_interval;
571 extern int portal_rotor;
573 void lnet_mt_event_handler(struct lnet_event *event);
575 int lnet_notify(struct lnet_ni *ni, lnet_nid_t peer, bool alive, bool reset,
577 void lnet_notify_locked(struct lnet_peer_ni *lp, int notifylnd, int alive,
579 int lnet_add_route(__u32 net, __u32 hops, lnet_nid_t gateway_nid,
580 __u32 priority, __u32 sensitivity);
581 int lnet_del_route(__u32 net, lnet_nid_t gw_nid);
582 void lnet_destroy_routes(void);
583 int lnet_get_route(int idx, __u32 *net, __u32 *hops,
584 lnet_nid_t *gateway, __u32 *alive, __u32 *priority,
586 int lnet_get_rtr_pool_cfg(int idx, struct lnet_ioctl_pool_cfg *pool_cfg);
587 struct lnet_ni *lnet_get_next_ni_locked(struct lnet_net *mynet,
588 struct lnet_ni *prev);
589 struct lnet_ni *lnet_get_ni_idx_locked(int idx);
591 extern int libcfs_ioctl_getdata(struct libcfs_ioctl_hdr **hdr_pp,
592 struct libcfs_ioctl_hdr __user *uparam);
593 extern int lnet_get_peer_list(__u32 *countp, __u32 *sizep,
594 struct lnet_process_id __user *ids);
595 extern void lnet_peer_ni_set_healthv(lnet_nid_t nid, int value, bool all);
596 extern void lnet_peer_ni_add_to_recoveryq_locked(struct lnet_peer_ni *lpni);
598 void lnet_router_debugfs_init(void);
599 void lnet_router_debugfs_fini(void);
600 int lnet_rtrpools_alloc(int im_a_router);
601 void lnet_destroy_rtrbuf(struct lnet_rtrbuf *rb, int npages);
602 int lnet_rtrpools_adjust(int tiny, int small, int large);
603 int lnet_rtrpools_enable(void);
604 void lnet_rtrpools_disable(void);
605 void lnet_rtrpools_free(int keep_pools);
606 void lnet_rtr_transfer_to_peer(struct lnet_peer *src,
607 struct lnet_peer *target);
608 struct lnet_remotenet *lnet_find_rnet_locked(__u32 net);
609 int lnet_dyn_add_net(struct lnet_ioctl_config_data *conf);
610 int lnet_dyn_del_net(__u32 net);
611 int lnet_dyn_add_ni(struct lnet_ioctl_config_ni *conf);
612 int lnet_dyn_del_ni(struct lnet_ioctl_config_ni *conf);
613 int lnet_clear_lazy_portal(struct lnet_ni *ni, int portal, char *reason);
614 struct lnet_net *lnet_get_net_locked(__u32 net_id);
616 int lnet_islocalnid(lnet_nid_t nid);
617 int lnet_islocalnet(__u32 net);
618 int lnet_islocalnet_locked(__u32 net);
620 void lnet_msg_attach_md(struct lnet_msg *msg, struct lnet_libmd *md,
621 unsigned int offset, unsigned int mlen);
622 void lnet_build_unlink_event(struct lnet_libmd *md, struct lnet_event *ev);
623 void lnet_build_msg_event(struct lnet_msg *msg, enum lnet_event_kind ev_type);
624 void lnet_msg_commit(struct lnet_msg *msg, int cpt);
625 void lnet_msg_decommit(struct lnet_msg *msg, int cpt, int status);
627 void lnet_eq_enqueue_event(struct lnet_eq *eq, struct lnet_event *ev);
628 void lnet_prep_send(struct lnet_msg *msg, int type,
629 struct lnet_process_id target, unsigned int offset,
631 int lnet_send(lnet_nid_t nid, struct lnet_msg *msg, lnet_nid_t rtr_nid);
632 int lnet_send_ping(lnet_nid_t dest_nid, struct lnet_handle_md *mdh, int nnis,
633 void *user_ptr, struct lnet_handle_eq eqh, bool recovery);
634 void lnet_return_tx_credits_locked(struct lnet_msg *msg);
635 void lnet_return_rx_credits_locked(struct lnet_msg *msg);
636 void lnet_schedule_blocked_locked(struct lnet_rtrbufpool *rbp);
637 void lnet_drop_routed_msgs_locked(struct list_head *list, int cpt);
639 /* portals functions */
640 /* portals attributes */
642 lnet_ptl_is_lazy(struct lnet_portal *ptl)
644 return !!(ptl->ptl_options & LNET_PTL_LAZY);
648 lnet_ptl_is_unique(struct lnet_portal *ptl)
650 return !!(ptl->ptl_options & LNET_PTL_MATCH_UNIQUE);
654 lnet_ptl_is_wildcard(struct lnet_portal *ptl)
656 return !!(ptl->ptl_options & LNET_PTL_MATCH_WILDCARD);
660 lnet_ptl_setopt(struct lnet_portal *ptl, int opt)
662 ptl->ptl_options |= opt;
666 lnet_ptl_unsetopt(struct lnet_portal *ptl, int opt)
668 ptl->ptl_options &= ~opt;
671 /* match-table functions */
672 struct list_head *lnet_mt_match_head(struct lnet_match_table *mtable,
673 struct lnet_process_id id, __u64 mbits);
674 struct lnet_match_table *lnet_mt_of_attach(unsigned int index,
675 struct lnet_process_id id,
676 __u64 mbits, __u64 ignore_bits,
677 enum lnet_ins_pos pos);
678 int lnet_mt_match_md(struct lnet_match_table *mtable,
679 struct lnet_match_info *info, struct lnet_msg *msg);
681 /* portals match/attach functions */
682 void lnet_ptl_attach_md(struct lnet_me *me, struct lnet_libmd *md,
683 struct list_head *matches, struct list_head *drops);
684 void lnet_ptl_detach_md(struct lnet_me *me, struct lnet_libmd *md);
685 int lnet_ptl_match_md(struct lnet_match_info *info, struct lnet_msg *msg);
687 /* initialized and finalize portals */
688 int lnet_portals_create(void);
689 void lnet_portals_destroy(void);
691 /* message functions */
692 int lnet_parse(struct lnet_ni *ni, struct lnet_hdr *hdr,
693 lnet_nid_t fromnid, void *private, int rdma_req);
694 int lnet_parse_local(struct lnet_ni *ni, struct lnet_msg *msg);
695 int lnet_parse_forward_locked(struct lnet_ni *ni, struct lnet_msg *msg);
697 void lnet_recv(struct lnet_ni *ni, void *private, struct lnet_msg *msg,
698 int delayed, unsigned int offset, unsigned int mlen,
700 void lnet_ni_recv(struct lnet_ni *ni, void *private, struct lnet_msg *msg,
701 int delayed, unsigned int offset,
702 unsigned int mlen, unsigned int rlen);
704 struct lnet_msg *lnet_create_reply_msg(struct lnet_ni *ni,
705 struct lnet_msg *get_msg);
706 void lnet_set_reply_msg_len(struct lnet_ni *ni, struct lnet_msg *msg,
708 void lnet_detach_rsp_tracker(struct lnet_libmd *md, int cpt);
710 void lnet_finalize(struct lnet_msg *msg, int rc);
711 bool lnet_send_error_simulation(struct lnet_msg *msg,
712 enum lnet_msg_hstatus *hstatus);
713 void lnet_handle_remote_failure_locked(struct lnet_peer_ni *lpni);
715 void lnet_drop_message(struct lnet_ni *ni, int cpt, void *private,
716 unsigned int nob, __u32 msg_type);
717 void lnet_drop_delayed_msg_list(struct list_head *head, char *reason);
718 void lnet_recv_delayed_msg_list(struct list_head *head);
720 int lnet_msg_container_setup(struct lnet_msg_container *container, int cpt);
721 void lnet_msg_container_cleanup(struct lnet_msg_container *container);
722 void lnet_msg_containers_destroy(void);
723 int lnet_msg_containers_create(void);
725 char *lnet_health_error2str(enum lnet_msg_hstatus hstatus);
726 char *lnet_msgtyp2str(int type);
727 void lnet_print_hdr(struct lnet_hdr *hdr);
728 int lnet_fail_nid(lnet_nid_t nid, unsigned int threshold);
730 /** \addtogroup lnet_fault_simulation @{ */
732 int lnet_fault_ctl(int cmd, struct libcfs_ioctl_data *data);
733 int lnet_fault_init(void);
734 void lnet_fault_fini(void);
736 bool lnet_drop_rule_match(struct lnet_hdr *hdr, lnet_nid_t local_nid,
737 enum lnet_msg_hstatus *hstatus);
739 int lnet_delay_rule_add(struct lnet_fault_attr *attr);
740 int lnet_delay_rule_del(lnet_nid_t src, lnet_nid_t dst, bool shutdown);
741 int lnet_delay_rule_list(int pos, struct lnet_fault_attr *attr,
742 struct lnet_fault_stat *stat);
743 void lnet_delay_rule_reset(void);
744 void lnet_delay_rule_check(void);
745 bool lnet_delay_rule_match_locked(struct lnet_hdr *hdr, struct lnet_msg *msg);
747 /** @} lnet_fault_simulation */
749 void lnet_counters_get_common(struct lnet_counters_common *common);
750 void lnet_counters_get(struct lnet_counters *counters);
751 void lnet_counters_reset(void);
753 unsigned int lnet_iov_nob(unsigned int niov, struct kvec *iov);
754 int lnet_extract_iov(int dst_niov, struct kvec *dst,
755 int src_niov, struct kvec *src,
756 unsigned int offset, unsigned int len);
758 unsigned int lnet_kiov_nob (unsigned int niov, lnet_kiov_t *iov);
759 int lnet_extract_kiov(int dst_niov, lnet_kiov_t *dst,
760 int src_niov, lnet_kiov_t *src,
761 unsigned int offset, unsigned int len);
763 void lnet_copy_iov2iov(unsigned int ndiov, struct kvec *diov,
764 unsigned int doffset,
765 unsigned int nsiov, struct kvec *siov,
766 unsigned int soffset, unsigned int nob);
767 void lnet_copy_kiov2iov(unsigned int niov, struct kvec *iov,
768 unsigned int iovoffset,
769 unsigned int nkiov, lnet_kiov_t *kiov,
770 unsigned int kiovoffset, unsigned int nob);
771 void lnet_copy_iov2kiov(unsigned int nkiov, lnet_kiov_t *kiov,
772 unsigned int kiovoffset,
773 unsigned int niov, struct kvec *iov,
774 unsigned int iovoffset, unsigned int nob);
775 void lnet_copy_kiov2kiov(unsigned int ndkiov, lnet_kiov_t *dkiov,
776 unsigned int doffset,
777 unsigned int nskiov, lnet_kiov_t *skiov,
778 unsigned int soffset, unsigned int nob);
781 lnet_copy_iov2flat(int dlen, void *dest, unsigned int doffset,
782 unsigned int nsiov, struct kvec *siov, unsigned int soffset,
785 struct kvec diov = { .iov_base = dest, .iov_len = dlen };
787 lnet_copy_iov2iov(1, &diov, doffset,
788 nsiov, siov, soffset, nob);
792 lnet_copy_kiov2flat(int dlen, void *dest, unsigned int doffset,
793 unsigned int nsiov, lnet_kiov_t *skiov,
794 unsigned int soffset, unsigned int nob)
796 struct kvec diov = { .iov_base = dest, .iov_len = dlen };
798 lnet_copy_kiov2iov(1, &diov, doffset,
799 nsiov, skiov, soffset, nob);
803 lnet_copy_flat2iov(unsigned int ndiov, struct kvec *diov, unsigned int doffset,
804 int slen, void *src, unsigned int soffset,
807 struct kvec siov = { .iov_base = src, .iov_len = slen };
808 lnet_copy_iov2iov(ndiov, diov, doffset,
809 1, &siov, soffset, nob);
813 lnet_copy_flat2kiov(unsigned int ndiov, lnet_kiov_t *dkiov,
814 unsigned int doffset, int slen, void *src,
815 unsigned int soffset, unsigned int nob)
817 struct kvec siov = { .iov_base = src, .iov_len = slen };
818 lnet_copy_iov2kiov(ndiov, dkiov, doffset,
819 1, &siov, soffset, nob);
822 void lnet_me_unlink(struct lnet_me *me);
824 void lnet_md_unlink(struct lnet_libmd *md);
825 void lnet_md_deconstruct(struct lnet_libmd *lmd, struct lnet_md *umd);
826 struct page *lnet_kvaddr_to_page(unsigned long vaddr);
827 int lnet_cpt_of_md(struct lnet_libmd *md, unsigned int offset);
829 unsigned int lnet_get_lnd_timeout(void);
830 void lnet_register_lnd(struct lnet_lnd *lnd);
831 void lnet_unregister_lnd(struct lnet_lnd *lnd);
833 int lnet_connect(struct socket **sockp, lnet_nid_t peer_nid,
834 __u32 local_ip, __u32 peer_ip, int peer_port);
835 void lnet_connect_console_error(int rc, lnet_nid_t peer_nid,
836 __u32 peer_ip, int port);
837 int lnet_count_acceptor_nets(void);
838 int lnet_acceptor_timeout(void);
839 int lnet_acceptor_port(void);
840 int lnet_acceptor_start(void);
841 void lnet_acceptor_stop(void);
843 int lnet_sock_setbuf(struct socket *socket, int txbufsize, int rxbufsize);
844 int lnet_sock_getbuf(struct socket *socket, int *txbufsize, int *rxbufsize);
845 int lnet_sock_getaddr(struct socket *socket, bool remote, __u32 *ip, int *port);
846 int lnet_sock_write(struct socket *sock, void *buffer, int nob, int timeout);
847 int lnet_sock_read(struct socket *sock, void *buffer, int nob, int timeout);
849 int lnet_sock_listen(struct socket **sockp, __u32 ip, int port, int backlog);
850 int lnet_sock_accept(struct socket **newsockp, struct socket *sock);
851 int lnet_sock_connect(struct socket **sockp, int *fatal,
852 __u32 local_ip, int local_port,
853 __u32 peer_ip, int peer_port);
855 int lnet_peers_start_down(void);
856 int lnet_peer_buffer_credits(struct lnet_net *net);
857 void lnet_consolidate_routes_locked(struct lnet_peer *orig_lp,
858 struct lnet_peer *new_lp);
859 void lnet_router_discovery_complete(struct lnet_peer *lp);
861 int lnet_monitor_thr_start(void);
862 void lnet_monitor_thr_stop(void);
864 bool lnet_router_checker_active(void);
865 void lnet_check_routers(void);
866 void lnet_wait_router_start(void);
867 void lnet_swap_pinginfo(struct lnet_ping_buffer *pbuf);
869 int lnet_ping_info_validate(struct lnet_ping_info *pinfo);
870 struct lnet_ping_buffer *lnet_ping_buffer_alloc(int nnis, gfp_t gfp);
871 void lnet_ping_buffer_free(struct lnet_ping_buffer *pbuf);
873 static inline void lnet_ping_buffer_addref(struct lnet_ping_buffer *pbuf)
875 atomic_inc(&pbuf->pb_refcnt);
878 static inline void lnet_ping_buffer_decref(struct lnet_ping_buffer *pbuf)
880 if (atomic_dec_and_test(&pbuf->pb_refcnt))
881 lnet_ping_buffer_free(pbuf);
884 static inline int lnet_ping_buffer_numref(struct lnet_ping_buffer *pbuf)
886 return atomic_read(&pbuf->pb_refcnt);
889 static inline int lnet_push_target_resize_needed(void)
891 return the_lnet.ln_push_target->pb_nnis < the_lnet.ln_push_target_nnis;
894 int lnet_push_target_resize(void);
895 void lnet_peer_push_event(struct lnet_event *ev);
897 int lnet_parse_ip2nets(char **networksp, char *ip2nets);
898 int lnet_parse_routes(char *route_str, int *im_a_router);
899 int lnet_parse_networks(struct list_head *nilist, char *networks,
900 bool use_tcp_bonding);
901 bool lnet_net_unique(__u32 net_id, struct list_head *nilist,
902 struct lnet_net **net);
903 bool lnet_ni_unique_net(struct list_head *nilist, char *iface);
904 void lnet_incr_dlc_seq(void);
905 __u32 lnet_get_dlc_seq_locked(void);
906 int lnet_get_net_count(void);
908 struct lnet_peer_net *lnet_get_next_peer_net_locked(struct lnet_peer *lp,
910 struct lnet_peer_ni *lnet_get_next_peer_ni_locked(struct lnet_peer *peer,
911 struct lnet_peer_net *peer_net,
912 struct lnet_peer_ni *prev);
913 struct lnet_peer_ni *lnet_nid2peerni_locked(lnet_nid_t nid, lnet_nid_t pref,
915 struct lnet_peer_ni *lnet_nid2peerni_ex(lnet_nid_t nid, int cpt);
916 struct lnet_peer_ni *lnet_peer_get_ni_locked(struct lnet_peer *lp,
918 struct lnet_peer_ni *lnet_find_peer_ni_locked(lnet_nid_t nid);
919 struct lnet_peer *lnet_find_peer(lnet_nid_t nid);
920 void lnet_peer_net_added(struct lnet_net *net);
921 lnet_nid_t lnet_peer_primary_nid_locked(lnet_nid_t nid);
922 int lnet_discover_peer_locked(struct lnet_peer_ni *lpni, int cpt, bool block);
923 int lnet_peer_discovery_start(void);
924 void lnet_peer_discovery_stop(void);
925 void lnet_push_update_to_peers(int force);
926 void lnet_peer_tables_cleanup(struct lnet_net *net);
927 void lnet_peer_uninit(void);
928 int lnet_peer_tables_create(void);
929 void lnet_debug_peer(lnet_nid_t nid);
930 struct lnet_peer_net *lnet_peer_get_net_locked(struct lnet_peer *peer,
932 bool lnet_peer_is_pref_nid_locked(struct lnet_peer_ni *lpni, lnet_nid_t nid);
933 int lnet_peer_ni_set_non_mr_pref_nid(struct lnet_peer_ni *lpni, lnet_nid_t nid);
934 int lnet_add_peer_ni(lnet_nid_t key_nid, lnet_nid_t nid, bool mr);
935 int lnet_del_peer_ni(lnet_nid_t key_nid, lnet_nid_t nid);
936 int lnet_get_peer_info(struct lnet_ioctl_peer_cfg *cfg, void __user *bulk);
937 int lnet_get_peer_ni_info(__u32 peer_index, __u64 *nid,
938 char alivness[LNET_MAX_STR_LEN],
939 __u32 *cpt_iter, __u32 *refcount,
940 __u32 *ni_peer_tx_credits, __u32 *peer_tx_credits,
941 __u32 *peer_rtr_credits, __u32 *peer_min_rtr_credtis,
942 __u32 *peer_tx_qnob);
943 int lnet_get_peer_ni_hstats(struct lnet_ioctl_peer_ni_hstats *stats);
945 static inline struct lnet_peer_net *
946 lnet_find_peer_net_locked(struct lnet_peer *peer, __u32 net_id)
948 struct lnet_peer_net *peer_net;
950 list_for_each_entry(peer_net, &peer->lp_peer_nets, lpn_peer_nets) {
951 if (peer_net->lpn_net_id == net_id)
959 lnet_peer_is_multi_rail(struct lnet_peer *lp)
961 if (lp->lp_state & LNET_PEER_MULTI_RAIL)
967 lnet_peer_ni_is_configured(struct lnet_peer_ni *lpni)
969 if (lpni->lpni_peer_net->lpn_peer->lp_state & LNET_PEER_CONFIGURED)
975 lnet_peer_ni_is_primary(struct lnet_peer_ni *lpni)
977 return lpni->lpni_nid == lpni->lpni_peer_net->lpn_peer->lp_primary_nid;
980 bool lnet_peer_is_uptodate(struct lnet_peer *lp);
981 bool lnet_is_discovery_disabled(struct lnet_peer *lp);
982 bool lnet_peer_gw_discovery(struct lnet_peer *lp);
985 lnet_peer_needs_push(struct lnet_peer *lp)
987 if (!(lp->lp_state & LNET_PEER_MULTI_RAIL))
989 if (lp->lp_state & LNET_PEER_FORCE_PUSH)
991 if (lp->lp_state & LNET_PEER_NO_DISCOVERY)
993 /* if discovery is not enabled then no need to push */
994 if (lnet_peer_discovery_disabled)
996 if (lp->lp_node_seqno < atomic_read(&the_lnet.ln_ping_target_seqno))
1002 * A peer is alive if it satisfies the following two conditions:
1003 * 1. peer health >= LNET_MAX_HEALTH_VALUE * router_sensitivity_percentage
1004 * 2. the cached NI status received when we discover the peer is UP
1007 lnet_is_peer_ni_alive(struct lnet_peer_ni *lpni)
1009 bool halive = false;
1011 halive = (atomic_read(&lpni->lpni_healthv) >=
1012 (LNET_MAX_HEALTH_VALUE * router_sensitivity_percentage / 100));
1014 return halive && lpni->lpni_ns_status == LNET_NI_STATUS_UP;
1018 lnet_set_healthv(atomic_t *healthv, int value)
1020 atomic_set(healthv, value);
1024 lnet_inc_healthv(atomic_t *healthv)
1026 atomic_add_unless(healthv, 1, LNET_MAX_HEALTH_VALUE);
1029 void lnet_incr_stats(struct lnet_element_stats *stats,
1030 enum lnet_msg_type msg_type,
1031 enum lnet_stats_type stats_type);
1033 __u32 lnet_sum_stats(struct lnet_element_stats *stats,
1034 enum lnet_stats_type stats_type);
1036 void lnet_usr_translate_stats(struct lnet_ioctl_element_msg_stats *msg_stats,
1037 struct lnet_element_stats *stats);