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
43 #include <linux/netdevice.h>
45 #include <libcfs/libcfs.h>
47 #include <lnet/lib-types.h>
48 #include <uapi/linux/lnet/lnet-dlc.h>
49 #include <uapi/linux/lnet/lnet-types.h>
50 #include <uapi/linux/lnet/lnetctl.h>
51 #include <uapi/linux/lnet/nidstr.h>
53 extern struct lnet the_lnet; /* THE network */
55 #if (BITS_PER_LONG == 32)
56 /* 2 CPTs, allowing more CPTs might make us under memory pressure */
57 # define LNET_CPT_MAX_BITS 1
59 #else /* 64-bit system */
61 * 256 CPTs for thousands of CPUs, allowing more CPTs might make us
62 * under risk of consuming all lh_cookie.
64 # define LNET_CPT_MAX_BITS 8
65 #endif /* BITS_PER_LONG == 32 */
67 /* max allowed CPT number */
68 #define LNET_CPT_MAX (1 << LNET_CPT_MAX_BITS)
70 #define LNET_CPT_NUMBER (the_lnet.ln_cpt_number)
71 #define LNET_CPT_BITS (the_lnet.ln_cpt_bits)
72 #define LNET_CPT_MASK ((1ULL << LNET_CPT_BITS) - 1)
75 #define LNET_LOCK_EX CFS_PERCPT_LOCK_EX
78 #define DEFAULT_PEER_TIMEOUT 180
79 #define LNET_LND_DEFAULT_TIMEOUT 5
81 #ifdef HAVE_KERN_SOCK_GETNAME_2ARGS
82 #define lnet_kernel_getpeername(sock, addr, addrlen) \
83 kernel_getpeername(sock, addr)
84 #define lnet_kernel_getsockname(sock, addr, addrlen) \
85 kernel_getsockname(sock, addr)
87 #define lnet_kernel_getpeername(sock, addr, addrlen) \
88 kernel_getpeername(sock, addr, addrlen)
89 #define lnet_kernel_getsockname(sock, addr, addrlen) \
90 kernel_getsockname(sock, addr, addrlen)
93 bool lnet_is_route_alive(struct lnet_route *route);
94 bool lnet_is_gateway_alive(struct lnet_peer *gw);
96 static inline int lnet_is_wire_handle_none(struct lnet_handle_wire *wh)
98 return (wh->wh_interface_cookie == LNET_WIRE_HANDLE_COOKIE_NONE &&
99 wh->wh_object_cookie == LNET_WIRE_HANDLE_COOKIE_NONE);
102 static inline int lnet_md_exhausted(struct lnet_libmd *md)
104 return (md->md_threshold == 0 ||
105 ((md->md_options & LNET_MD_MAX_SIZE) != 0 &&
106 md->md_offset + md->md_max_size > md->md_length));
109 static inline int lnet_md_unlinkable(struct lnet_libmd *md)
111 /* Should unlink md when its refcount is 0 and either:
112 * - md has been flagged for deletion (by auto unlink or LNetM[DE]Unlink,
113 * in the latter case md may not be exhausted).
114 * - auto unlink is on and md is exhausted.
116 if (md->md_refcount != 0)
119 if ((md->md_flags & LNET_MD_FLAG_ZOMBIE) != 0)
122 return ((md->md_flags & LNET_MD_FLAG_AUTO_UNLINK) != 0 &&
123 lnet_md_exhausted(md));
126 #define lnet_cpt_table() (the_lnet.ln_cpt_table)
127 #define lnet_cpt_current() cfs_cpt_current(the_lnet.ln_cpt_table, 1)
130 lnet_cpt_of_cookie(__u64 cookie)
132 unsigned int cpt = (cookie >> LNET_COOKIE_TYPE_BITS) & LNET_CPT_MASK;
134 /* LNET_CPT_NUMBER doesn't have to be power2, which means we can
135 * get illegal cpt from it's invalid cookie */
136 return cpt < LNET_CPT_NUMBER ? cpt : cpt % LNET_CPT_NUMBER;
140 lnet_res_lock(int cpt)
142 cfs_percpt_lock(the_lnet.ln_res_lock, cpt);
146 lnet_res_unlock(int cpt)
148 cfs_percpt_unlock(the_lnet.ln_res_lock, cpt);
152 lnet_res_lock_current(void)
154 int cpt = lnet_cpt_current();
161 lnet_net_lock(int cpt)
163 cfs_percpt_lock(the_lnet.ln_net_lock, cpt);
167 lnet_net_unlock(int cpt)
169 cfs_percpt_unlock(the_lnet.ln_net_lock, cpt);
173 lnet_net_lock_current(void)
175 int cpt = lnet_cpt_current();
181 #define LNET_LOCK() lnet_net_lock(LNET_LOCK_EX)
182 #define LNET_UNLOCK() lnet_net_unlock(LNET_LOCK_EX)
184 #define lnet_ptl_lock(ptl) spin_lock(&(ptl)->ptl_lock)
185 #define lnet_ptl_unlock(ptl) spin_unlock(&(ptl)->ptl_lock)
186 #define lnet_eq_wait_lock() spin_lock(&the_lnet.ln_eq_wait_lock)
187 #define lnet_eq_wait_unlock() spin_unlock(&the_lnet.ln_eq_wait_lock)
188 #define lnet_ni_lock(ni) spin_lock(&(ni)->ni_lock)
189 #define lnet_ni_unlock(ni) spin_unlock(&(ni)->ni_lock)
191 #define MAX_PORTALS 64
193 #define LNET_SMALL_MD_SIZE offsetof(struct lnet_libmd, md_iov.iov[1])
194 extern struct kmem_cache *lnet_mes_cachep; /* MEs kmem_cache */
195 extern struct kmem_cache *lnet_small_mds_cachep; /* <= LNET_SMALL_MD_SIZE bytes
197 extern struct kmem_cache *lnet_rspt_cachep;
198 extern struct kmem_cache *lnet_msg_cachep;
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 LASSERTF(md->md_rspt_ptr == NULL, "md %p rsp %p\n", md, md->md_rspt_ptr);
263 if ((md->md_options & LNET_MD_KIOV) != 0)
264 size = offsetof(struct lnet_libmd, md_iov.kiov[md->md_niov]);
266 size = offsetof(struct lnet_libmd, md_iov.iov[md->md_niov]);
268 if (size <= LNET_SMALL_MD_SIZE) {
269 CDEBUG(D_MALLOC, "slab-freed 'md' at %p.\n", md);
270 kmem_cache_free(lnet_small_mds_cachep, md);
272 LIBCFS_FREE(md, size);
276 static inline struct lnet_me *
281 me = kmem_cache_alloc(lnet_mes_cachep, GFP_NOFS | __GFP_ZERO);
284 CDEBUG(D_MALLOC, "slab-alloced 'me' at %p.\n", me);
286 CDEBUG(D_MALLOC, "failed to allocate 'me'\n");
292 lnet_me_free(struct lnet_me *me)
294 CDEBUG(D_MALLOC, "slab-freed 'me' at %p.\n", me);
295 kmem_cache_free(lnet_mes_cachep, me);
298 struct lnet_libhandle *lnet_res_lh_lookup(struct lnet_res_container *rec,
300 void lnet_res_lh_initialize(struct lnet_res_container *rec,
301 struct lnet_libhandle *lh);
303 lnet_res_lh_invalidate(struct lnet_libhandle *lh)
305 /* ALWAYS called with resource lock held */
306 /* NB: cookie is still useful, don't reset it */
307 list_del(&lh->lh_hash_chain);
311 lnet_eq2handle(struct lnet_handle_eq *handle, struct lnet_eq *eq)
314 LNetInvalidateEQHandle(handle);
318 handle->cookie = eq->eq_lh.lh_cookie;
321 static inline struct lnet_eq *
322 lnet_handle2eq(struct lnet_handle_eq *handle)
324 /* ALWAYS called with resource lock held */
325 struct lnet_libhandle *lh;
327 lh = lnet_res_lh_lookup(&the_lnet.ln_eq_container, handle->cookie);
331 return lh_entry(lh, struct lnet_eq, eq_lh);
335 lnet_md2handle(struct lnet_handle_md *handle, struct lnet_libmd *md)
337 handle->cookie = md->md_lh.lh_cookie;
340 static inline struct lnet_libmd *
341 lnet_handle2md(struct lnet_handle_md *handle)
343 /* ALWAYS called with resource lock held */
344 struct lnet_libhandle *lh;
347 cpt = lnet_cpt_of_cookie(handle->cookie);
348 lh = lnet_res_lh_lookup(the_lnet.ln_md_containers[cpt],
353 return lh_entry(lh, struct lnet_libmd, md_lh);
356 static inline struct lnet_libmd *
357 lnet_wire_handle2md(struct lnet_handle_wire *wh)
359 /* ALWAYS called with resource lock held */
360 struct lnet_libhandle *lh;
363 if (wh->wh_interface_cookie != the_lnet.ln_interface_cookie)
366 cpt = lnet_cpt_of_cookie(wh->wh_object_cookie);
367 lh = lnet_res_lh_lookup(the_lnet.ln_md_containers[cpt],
368 wh->wh_object_cookie);
372 return lh_entry(lh, struct lnet_libmd, md_lh);
376 lnet_peer_net_addref_locked(struct lnet_peer_net *lpn)
378 atomic_inc(&lpn->lpn_refcount);
381 extern void lnet_destroy_peer_net_locked(struct lnet_peer_net *lpn);
384 lnet_peer_net_decref_locked(struct lnet_peer_net *lpn)
386 if (atomic_dec_and_test(&lpn->lpn_refcount))
387 lnet_destroy_peer_net_locked(lpn);
391 lnet_peer_addref_locked(struct lnet_peer *lp)
393 atomic_inc(&lp->lp_refcount);
396 extern void lnet_destroy_peer_locked(struct lnet_peer *lp);
399 lnet_peer_decref_locked(struct lnet_peer *lp)
401 if (atomic_dec_and_test(&lp->lp_refcount))
402 lnet_destroy_peer_locked(lp);
406 lnet_peer_ni_addref_locked(struct lnet_peer_ni *lp)
408 LASSERT(atomic_read(&lp->lpni_refcount) > 0);
409 atomic_inc(&lp->lpni_refcount);
412 extern void lnet_destroy_peer_ni_locked(struct lnet_peer_ni *lp);
415 lnet_peer_ni_decref_locked(struct lnet_peer_ni *lp)
417 LASSERT(atomic_read(&lp->lpni_refcount) > 0);
418 if (atomic_dec_and_test(&lp->lpni_refcount))
419 lnet_destroy_peer_ni_locked(lp);
423 lnet_isrouter(struct lnet_peer_ni *lpni)
425 return lpni->lpni_peer_net->lpn_peer->lp_rtr_refcount != 0;
429 lnet_ni_addref_locked(struct lnet_ni *ni, int cpt)
431 LASSERT(cpt >= 0 && cpt < LNET_CPT_NUMBER);
432 LASSERT(*ni->ni_refs[cpt] >= 0);
434 (*ni->ni_refs[cpt])++;
438 lnet_ni_addref(struct lnet_ni *ni)
441 lnet_ni_addref_locked(ni, 0);
446 lnet_ni_decref_locked(struct lnet_ni *ni, int cpt)
448 LASSERT(cpt >= 0 && cpt < LNET_CPT_NUMBER);
449 LASSERT(*ni->ni_refs[cpt] > 0);
451 (*ni->ni_refs[cpt])--;
455 lnet_ni_decref(struct lnet_ni *ni)
458 lnet_ni_decref_locked(ni, 0);
462 static inline struct lnet_msg *
465 struct lnet_msg *msg;
467 msg = kmem_cache_alloc(lnet_msg_cachep, GFP_NOFS | __GFP_ZERO);
473 lnet_msg_free(struct lnet_msg *msg)
475 LASSERT(!msg->msg_onactivelist);
476 kmem_cache_free(lnet_msg_cachep, msg);
479 static inline struct lnet_rsp_tracker *
480 lnet_rspt_alloc(int cpt)
482 struct lnet_rsp_tracker *rspt;
484 rspt = kmem_cache_alloc(lnet_rspt_cachep, GFP_NOFS | __GFP_ZERO);
487 the_lnet.ln_counters[cpt]->lct_health.lch_rst_alloc++;
488 lnet_net_unlock(cpt);
490 CDEBUG(D_MALLOC, "rspt alloc %p\n", rspt);
495 lnet_rspt_free(struct lnet_rsp_tracker *rspt, int cpt)
497 CDEBUG(D_MALLOC, "rspt free %p\n", rspt);
499 kmem_cache_free(lnet_rspt_cachep, rspt);
501 the_lnet.ln_counters[cpt]->lct_health.lch_rst_alloc--;
502 lnet_net_unlock(cpt);
505 void lnet_ni_free(struct lnet_ni *ni);
506 void lnet_net_free(struct lnet_net *net);
509 lnet_net_alloc(__u32 net_type, struct list_head *netlist);
512 lnet_ni_alloc(struct lnet_net *net, struct cfs_expr_list *el,
515 lnet_ni_alloc_w_cpt_array(struct lnet_net *net, __u32 *cpts, __u32 ncpts,
519 lnet_nid2peerhash(lnet_nid_t nid)
521 return hash_long(nid, LNET_PEER_HASH_BITS);
524 static inline struct list_head *
525 lnet_net2rnethash(__u32 net)
527 return &the_lnet.ln_remote_nets_hash[(LNET_NETNUM(net) +
529 ((1U << the_lnet.ln_remote_nets_hbits) - 1)];
532 extern const struct lnet_lnd the_lolnd;
533 extern int avoid_asym_router_failure;
535 extern unsigned int lnet_nid_cpt_hash(lnet_nid_t nid, unsigned int number);
536 extern int lnet_cpt_of_nid_locked(lnet_nid_t nid, struct lnet_ni *ni);
537 extern int lnet_cpt_of_nid(lnet_nid_t nid, struct lnet_ni *ni);
538 extern struct lnet_ni *lnet_nid2ni_locked(lnet_nid_t nid, int cpt);
539 extern struct lnet_ni *lnet_nid2ni_addref(lnet_nid_t nid);
540 extern struct lnet_ni *lnet_net2ni_locked(__u32 net, int cpt);
541 extern struct lnet_ni *lnet_net2ni_addref(__u32 net);
542 struct lnet_net *lnet_get_net_locked(__u32 net_id);
544 int lnet_lib_init(void);
545 void lnet_lib_exit(void);
547 extern unsigned lnet_transaction_timeout;
548 extern unsigned lnet_retry_count;
549 extern unsigned int lnet_numa_range;
550 extern unsigned int lnet_health_sensitivity;
551 extern unsigned int lnet_recovery_interval;
552 extern unsigned int lnet_peer_discovery_disabled;
553 extern unsigned int lnet_drop_asym_route;
554 extern unsigned int router_sensitivity_percentage;
555 extern int alive_router_check_interval;
556 extern int live_router_check_interval;
557 extern int dead_router_check_interval;
558 extern int portal_rotor;
560 void lnet_mt_event_handler(struct lnet_event *event);
562 int lnet_notify(struct lnet_ni *ni, lnet_nid_t peer, bool alive, bool reset,
564 void lnet_notify_locked(struct lnet_peer_ni *lp, int notifylnd, int alive,
566 int lnet_add_route(__u32 net, __u32 hops, lnet_nid_t gateway_nid,
567 __u32 priority, __u32 sensitivity);
568 int lnet_del_route(__u32 net, lnet_nid_t gw_nid);
569 void lnet_destroy_routes(void);
570 int lnet_get_route(int idx, __u32 *net, __u32 *hops,
571 lnet_nid_t *gateway, __u32 *alive, __u32 *priority,
573 int lnet_get_rtr_pool_cfg(int idx, struct lnet_ioctl_pool_cfg *pool_cfg);
574 struct lnet_ni *lnet_get_next_ni_locked(struct lnet_net *mynet,
575 struct lnet_ni *prev);
576 struct lnet_ni *lnet_get_ni_idx_locked(int idx);
578 extern int libcfs_ioctl_getdata(struct libcfs_ioctl_hdr **hdr_pp,
579 struct libcfs_ioctl_hdr __user *uparam);
580 extern int lnet_get_peer_list(__u32 *countp, __u32 *sizep,
581 struct lnet_process_id __user *ids);
582 extern void lnet_peer_ni_set_healthv(lnet_nid_t nid, int value, bool all);
583 extern void lnet_peer_ni_add_to_recoveryq_locked(struct lnet_peer_ni *lpni);
585 void lnet_router_debugfs_init(void);
586 void lnet_router_debugfs_fini(void);
587 int lnet_rtrpools_alloc(int im_a_router);
588 void lnet_destroy_rtrbuf(struct lnet_rtrbuf *rb, int npages);
589 int lnet_rtrpools_adjust(int tiny, int small, int large);
590 int lnet_rtrpools_enable(void);
591 void lnet_rtrpools_disable(void);
592 void lnet_rtrpools_free(int keep_pools);
593 void lnet_rtr_transfer_to_peer(struct lnet_peer *src,
594 struct lnet_peer *target);
595 struct lnet_remotenet *lnet_find_rnet_locked(__u32 net);
596 int lnet_dyn_add_net(struct lnet_ioctl_config_data *conf);
597 int lnet_dyn_del_net(__u32 net);
598 int lnet_dyn_add_ni(struct lnet_ioctl_config_ni *conf);
599 int lnet_dyn_del_ni(struct lnet_ioctl_config_ni *conf);
600 int lnet_clear_lazy_portal(struct lnet_ni *ni, int portal, char *reason);
601 struct lnet_net *lnet_get_net_locked(__u32 net_id);
603 int lnet_islocalnid(lnet_nid_t nid);
604 int lnet_islocalnet(__u32 net);
605 int lnet_islocalnet_locked(__u32 net);
607 void lnet_msg_attach_md(struct lnet_msg *msg, struct lnet_libmd *md,
608 unsigned int offset, unsigned int mlen);
609 void lnet_build_unlink_event(struct lnet_libmd *md, struct lnet_event *ev);
610 void lnet_build_msg_event(struct lnet_msg *msg, enum lnet_event_kind ev_type);
611 void lnet_msg_commit(struct lnet_msg *msg, int cpt);
612 void lnet_msg_decommit(struct lnet_msg *msg, int cpt, int status);
614 void lnet_eq_enqueue_event(struct lnet_eq *eq, struct lnet_event *ev);
615 void lnet_prep_send(struct lnet_msg *msg, int type,
616 struct lnet_process_id target, unsigned int offset,
618 int lnet_send(lnet_nid_t nid, struct lnet_msg *msg, lnet_nid_t rtr_nid);
619 int lnet_send_ping(lnet_nid_t dest_nid, struct lnet_handle_md *mdh, int nnis,
620 void *user_ptr, struct lnet_handle_eq eqh, bool recovery);
621 void lnet_return_tx_credits_locked(struct lnet_msg *msg);
622 void lnet_return_rx_credits_locked(struct lnet_msg *msg);
623 void lnet_schedule_blocked_locked(struct lnet_rtrbufpool *rbp);
624 void lnet_drop_routed_msgs_locked(struct list_head *list, int cpt);
626 struct list_head **lnet_create_array_of_queues(void);
628 /* portals functions */
629 /* portals attributes */
631 lnet_ptl_is_lazy(struct lnet_portal *ptl)
633 return !!(ptl->ptl_options & LNET_PTL_LAZY);
637 lnet_ptl_is_unique(struct lnet_portal *ptl)
639 return !!(ptl->ptl_options & LNET_PTL_MATCH_UNIQUE);
643 lnet_ptl_is_wildcard(struct lnet_portal *ptl)
645 return !!(ptl->ptl_options & LNET_PTL_MATCH_WILDCARD);
649 lnet_ptl_setopt(struct lnet_portal *ptl, int opt)
651 ptl->ptl_options |= opt;
655 lnet_ptl_unsetopt(struct lnet_portal *ptl, int opt)
657 ptl->ptl_options &= ~opt;
660 /* match-table functions */
661 struct list_head *lnet_mt_match_head(struct lnet_match_table *mtable,
662 struct lnet_process_id id, __u64 mbits);
663 struct lnet_match_table *lnet_mt_of_attach(unsigned int index,
664 struct lnet_process_id id,
665 __u64 mbits, __u64 ignore_bits,
666 enum lnet_ins_pos pos);
667 int lnet_mt_match_md(struct lnet_match_table *mtable,
668 struct lnet_match_info *info, struct lnet_msg *msg);
670 /* portals match/attach functions */
671 void lnet_ptl_attach_md(struct lnet_me *me, struct lnet_libmd *md,
672 struct list_head *matches, struct list_head *drops);
673 void lnet_ptl_detach_md(struct lnet_me *me, struct lnet_libmd *md);
674 int lnet_ptl_match_md(struct lnet_match_info *info, struct lnet_msg *msg);
676 /* initialized and finalize portals */
677 int lnet_portals_create(void);
678 void lnet_portals_destroy(void);
680 /* message functions */
681 int lnet_parse(struct lnet_ni *ni, struct lnet_hdr *hdr,
682 lnet_nid_t fromnid, void *private, int rdma_req);
683 int lnet_parse_local(struct lnet_ni *ni, struct lnet_msg *msg);
684 int lnet_parse_forward_locked(struct lnet_ni *ni, struct lnet_msg *msg);
686 void lnet_recv(struct lnet_ni *ni, void *private, struct lnet_msg *msg,
687 int delayed, unsigned int offset, unsigned int mlen,
689 void lnet_ni_recv(struct lnet_ni *ni, void *private, struct lnet_msg *msg,
690 int delayed, unsigned int offset,
691 unsigned int mlen, unsigned int rlen);
693 struct lnet_msg *lnet_create_reply_msg(struct lnet_ni *ni,
694 struct lnet_msg *get_msg);
695 void lnet_set_reply_msg_len(struct lnet_ni *ni, struct lnet_msg *msg,
697 void lnet_detach_rsp_tracker(struct lnet_libmd *md, int cpt);
698 void lnet_clean_zombie_rstqs(void);
700 void lnet_finalize(struct lnet_msg *msg, int rc);
701 bool lnet_send_error_simulation(struct lnet_msg *msg,
702 enum lnet_msg_hstatus *hstatus);
703 void lnet_handle_remote_failure_locked(struct lnet_peer_ni *lpni);
705 void lnet_drop_message(struct lnet_ni *ni, int cpt, void *private,
706 unsigned int nob, __u32 msg_type);
707 void lnet_drop_delayed_msg_list(struct list_head *head, char *reason);
708 void lnet_recv_delayed_msg_list(struct list_head *head);
710 int lnet_msg_container_setup(struct lnet_msg_container *container, int cpt);
711 void lnet_msg_container_cleanup(struct lnet_msg_container *container);
712 void lnet_msg_containers_destroy(void);
713 int lnet_msg_containers_create(void);
715 char *lnet_health_error2str(enum lnet_msg_hstatus hstatus);
716 char *lnet_msgtyp2str(int type);
717 void lnet_print_hdr(struct lnet_hdr *hdr);
718 int lnet_fail_nid(lnet_nid_t nid, unsigned int threshold);
720 /** \addtogroup lnet_fault_simulation @{ */
722 int lnet_fault_ctl(int cmd, struct libcfs_ioctl_data *data);
723 int lnet_fault_init(void);
724 void lnet_fault_fini(void);
726 bool lnet_drop_rule_match(struct lnet_hdr *hdr, lnet_nid_t local_nid,
727 enum lnet_msg_hstatus *hstatus);
729 int lnet_delay_rule_add(struct lnet_fault_attr *attr);
730 int lnet_delay_rule_del(lnet_nid_t src, lnet_nid_t dst, bool shutdown);
731 int lnet_delay_rule_list(int pos, struct lnet_fault_attr *attr,
732 struct lnet_fault_stat *stat);
733 void lnet_delay_rule_reset(void);
734 void lnet_delay_rule_check(void);
735 bool lnet_delay_rule_match_locked(struct lnet_hdr *hdr, struct lnet_msg *msg);
737 /** @} lnet_fault_simulation */
739 void lnet_counters_get_common(struct lnet_counters_common *common);
740 void lnet_counters_get(struct lnet_counters *counters);
741 void lnet_counters_reset(void);
743 unsigned int lnet_iov_nob(unsigned int niov, struct kvec *iov);
744 int lnet_extract_iov(int dst_niov, struct kvec *dst,
745 int src_niov, struct kvec *src,
746 unsigned int offset, unsigned int len);
748 unsigned int lnet_kiov_nob (unsigned int niov, lnet_kiov_t *iov);
749 int lnet_extract_kiov(int dst_niov, lnet_kiov_t *dst,
750 int src_niov, lnet_kiov_t *src,
751 unsigned int offset, unsigned int len);
753 void lnet_copy_iov2iov(unsigned int ndiov, struct kvec *diov,
754 unsigned int doffset,
755 unsigned int nsiov, struct kvec *siov,
756 unsigned int soffset, unsigned int nob);
757 void lnet_copy_kiov2iov(unsigned int niov, struct kvec *iov,
758 unsigned int iovoffset,
759 unsigned int nkiov, lnet_kiov_t *kiov,
760 unsigned int kiovoffset, unsigned int nob);
761 void lnet_copy_iov2kiov(unsigned int nkiov, lnet_kiov_t *kiov,
762 unsigned int kiovoffset,
763 unsigned int niov, struct kvec *iov,
764 unsigned int iovoffset, unsigned int nob);
765 void lnet_copy_kiov2kiov(unsigned int ndkiov, lnet_kiov_t *dkiov,
766 unsigned int doffset,
767 unsigned int nskiov, lnet_kiov_t *skiov,
768 unsigned int soffset, unsigned int nob);
771 lnet_copy_iov2flat(int dlen, void *dest, unsigned int doffset,
772 unsigned int nsiov, struct kvec *siov, unsigned int soffset,
775 struct kvec diov = { .iov_base = dest, .iov_len = dlen };
777 lnet_copy_iov2iov(1, &diov, doffset,
778 nsiov, siov, soffset, nob);
782 lnet_copy_kiov2flat(int dlen, void *dest, unsigned int doffset,
783 unsigned int nsiov, lnet_kiov_t *skiov,
784 unsigned int soffset, unsigned int nob)
786 struct kvec diov = { .iov_base = dest, .iov_len = dlen };
788 lnet_copy_kiov2iov(1, &diov, doffset,
789 nsiov, skiov, soffset, nob);
793 lnet_copy_flat2iov(unsigned int ndiov, struct kvec *diov, unsigned int doffset,
794 int slen, void *src, unsigned int soffset,
797 struct kvec siov = { .iov_base = src, .iov_len = slen };
798 lnet_copy_iov2iov(ndiov, diov, doffset,
799 1, &siov, soffset, nob);
803 lnet_copy_flat2kiov(unsigned int ndiov, lnet_kiov_t *dkiov,
804 unsigned int doffset, int slen, void *src,
805 unsigned int soffset, unsigned int nob)
807 struct kvec siov = { .iov_base = src, .iov_len = slen };
808 lnet_copy_iov2kiov(ndiov, dkiov, doffset,
809 1, &siov, soffset, nob);
812 void lnet_me_unlink(struct lnet_me *me);
814 void lnet_md_unlink(struct lnet_libmd *md);
815 void lnet_md_deconstruct(struct lnet_libmd *lmd, struct lnet_md *umd);
816 struct page *lnet_kvaddr_to_page(unsigned long vaddr);
817 int lnet_cpt_of_md(struct lnet_libmd *md, unsigned int offset);
819 unsigned int lnet_get_lnd_timeout(void);
820 void lnet_register_lnd(const struct lnet_lnd *lnd);
821 void lnet_unregister_lnd(const struct lnet_lnd *lnd);
823 int lnet_connect(struct socket **sockp, lnet_nid_t peer_nid,
824 __u32 local_ip, __u32 peer_ip, int peer_port, struct net *ns);
825 void lnet_connect_console_error(int rc, lnet_nid_t peer_nid,
826 __u32 peer_ip, int port);
827 int lnet_count_acceptor_nets(void);
828 int lnet_acceptor_timeout(void);
829 int lnet_acceptor_port(void);
830 int lnet_acceptor_start(void);
831 void lnet_acceptor_stop(void);
833 struct lnet_inetdev {
838 char li_name[IFNAMSIZ];
841 int lnet_inet_enumerate(struct lnet_inetdev **dev_list, struct net *ns);
842 int lnet_sock_setbuf(struct socket *socket, int txbufsize, int rxbufsize);
843 int lnet_sock_getbuf(struct socket *socket, int *txbufsize, int *rxbufsize);
844 int lnet_sock_getaddr(struct socket *socket, bool remote, __u32 *ip, int *port);
845 int lnet_sock_write(struct socket *sock, void *buffer, int nob, int timeout);
846 int lnet_sock_read(struct socket *sock, void *buffer, int nob, int timeout);
848 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, struct net *ns);
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);
860 void lnet_router_discovery_ping_reply(struct lnet_peer *lp);
862 int lnet_monitor_thr_start(void);
863 void lnet_monitor_thr_stop(void);
865 bool lnet_router_checker_active(void);
866 void lnet_check_routers(void);
867 void lnet_wait_router_start(void);
868 void lnet_swap_pinginfo(struct lnet_ping_buffer *pbuf);
870 int lnet_ping_info_validate(struct lnet_ping_info *pinfo);
871 struct lnet_ping_buffer *lnet_ping_buffer_alloc(int nnis, gfp_t gfp);
872 void lnet_ping_buffer_free(struct lnet_ping_buffer *pbuf);
874 static inline void lnet_ping_buffer_addref(struct lnet_ping_buffer *pbuf)
876 atomic_inc(&pbuf->pb_refcnt);
879 static inline void lnet_ping_buffer_decref(struct lnet_ping_buffer *pbuf)
881 if (atomic_dec_and_test(&pbuf->pb_refcnt))
882 lnet_ping_buffer_free(pbuf);
885 static inline int lnet_ping_buffer_numref(struct lnet_ping_buffer *pbuf)
887 return atomic_read(&pbuf->pb_refcnt);
890 static inline int lnet_push_target_resize_needed(void)
892 return the_lnet.ln_push_target->pb_nnis < the_lnet.ln_push_target_nnis;
895 int lnet_push_target_resize(void);
896 void lnet_peer_push_event(struct lnet_event *ev);
898 int lnet_parse_ip2nets(char **networksp, char *ip2nets);
899 int lnet_parse_routes(char *route_str, int *im_a_router);
900 int lnet_parse_networks(struct list_head *nilist, char *networks,
901 bool use_tcp_bonding);
902 bool lnet_net_unique(__u32 net_id, struct list_head *nilist,
903 struct lnet_net **net);
904 bool lnet_ni_unique_net(struct list_head *nilist, char *iface);
905 void lnet_incr_dlc_seq(void);
906 __u32 lnet_get_dlc_seq_locked(void);
907 int lnet_get_net_count(void);
908 extern unsigned int lnet_current_net_count;
910 struct lnet_peer_net *lnet_get_next_peer_net_locked(struct lnet_peer *lp,
912 struct lnet_peer_ni *lnet_get_next_peer_ni_locked(struct lnet_peer *peer,
913 struct lnet_peer_net *peer_net,
914 struct lnet_peer_ni *prev);
915 struct lnet_peer_ni *lnet_nid2peerni_locked(lnet_nid_t nid, lnet_nid_t pref,
917 struct lnet_peer_ni *lnet_nid2peerni_ex(lnet_nid_t nid, int cpt);
918 struct lnet_peer_ni *lnet_peer_get_ni_locked(struct lnet_peer *lp,
920 struct lnet_peer_ni *lnet_find_peer_ni_locked(lnet_nid_t nid);
921 struct lnet_peer *lnet_find_peer(lnet_nid_t nid);
922 void lnet_peer_net_added(struct lnet_net *net);
923 lnet_nid_t lnet_peer_primary_nid_locked(lnet_nid_t nid);
924 int lnet_discover_peer_locked(struct lnet_peer_ni *lpni, int cpt, bool block);
925 int lnet_peer_discovery_start(void);
926 void lnet_peer_discovery_stop(void);
927 void lnet_push_update_to_peers(int force);
928 void lnet_peer_tables_cleanup(struct lnet_net *net);
929 void lnet_peer_uninit(void);
930 int lnet_peer_tables_create(void);
931 void lnet_debug_peer(lnet_nid_t nid);
932 struct lnet_peer_net *lnet_peer_get_net_locked(struct lnet_peer *peer,
934 bool lnet_peer_is_pref_nid_locked(struct lnet_peer_ni *lpni, lnet_nid_t nid);
935 int lnet_peer_ni_set_non_mr_pref_nid(struct lnet_peer_ni *lpni, lnet_nid_t nid);
936 int lnet_add_peer_ni(lnet_nid_t key_nid, lnet_nid_t nid, bool mr);
937 int lnet_del_peer_ni(lnet_nid_t key_nid, lnet_nid_t nid);
938 int lnet_get_peer_info(struct lnet_ioctl_peer_cfg *cfg, void __user *bulk);
939 int lnet_get_peer_ni_info(__u32 peer_index, __u64 *nid,
940 char alivness[LNET_MAX_STR_LEN],
941 __u32 *cpt_iter, __u32 *refcount,
942 __u32 *ni_peer_tx_credits, __u32 *peer_tx_credits,
943 __u32 *peer_rtr_credits, __u32 *peer_min_rtr_credtis,
944 __u32 *peer_tx_qnob);
945 int lnet_get_peer_ni_hstats(struct lnet_ioctl_peer_ni_hstats *stats);
947 static inline struct lnet_peer_net *
948 lnet_find_peer_net_locked(struct lnet_peer *peer, __u32 net_id)
950 struct lnet_peer_net *peer_net;
952 list_for_each_entry(peer_net, &peer->lp_peer_nets, lpn_peer_nets) {
953 if (peer_net->lpn_net_id == net_id)
961 lnet_peer_is_multi_rail(struct lnet_peer *lp)
963 if (lp->lp_state & LNET_PEER_MULTI_RAIL)
969 lnet_peer_ni_is_configured(struct lnet_peer_ni *lpni)
971 if (lpni->lpni_peer_net->lpn_peer->lp_state & LNET_PEER_CONFIGURED)
977 lnet_peer_ni_is_primary(struct lnet_peer_ni *lpni)
979 return lpni->lpni_nid == lpni->lpni_peer_net->lpn_peer->lp_primary_nid;
982 bool lnet_peer_is_uptodate(struct lnet_peer *lp);
983 bool lnet_peer_is_uptodate_locked(struct lnet_peer *lp);
984 bool lnet_is_discovery_disabled(struct lnet_peer *lp);
985 bool lnet_is_discovery_disabled_locked(struct lnet_peer *lp);
986 bool lnet_peer_gw_discovery(struct lnet_peer *lp);
989 lnet_peer_needs_push(struct lnet_peer *lp)
991 if (!(lp->lp_state & LNET_PEER_MULTI_RAIL))
993 if (lp->lp_state & LNET_PEER_FORCE_PUSH)
995 if (lp->lp_state & LNET_PEER_NO_DISCOVERY)
997 /* if discovery is not enabled then no need to push */
998 if (lnet_peer_discovery_disabled)
1000 if (lp->lp_node_seqno < atomic_read(&the_lnet.ln_ping_target_seqno))
1006 * A peer is alive if it satisfies the following two conditions:
1007 * 1. peer health >= LNET_MAX_HEALTH_VALUE * router_sensitivity_percentage
1008 * 2. the cached NI status received when we discover the peer is UP
1011 lnet_is_peer_ni_alive(struct lnet_peer_ni *lpni)
1013 bool halive = false;
1015 halive = (atomic_read(&lpni->lpni_healthv) >=
1016 (LNET_MAX_HEALTH_VALUE * router_sensitivity_percentage / 100));
1018 return halive && lpni->lpni_ns_status == LNET_NI_STATUS_UP;
1022 lnet_set_healthv(atomic_t *healthv, int value)
1024 atomic_set(healthv, value);
1028 lnet_inc_healthv(atomic_t *healthv)
1030 atomic_add_unless(healthv, 1, LNET_MAX_HEALTH_VALUE);
1033 void lnet_incr_stats(struct lnet_element_stats *stats,
1034 enum lnet_msg_type msg_type,
1035 enum lnet_stats_type stats_type);
1037 __u32 lnet_sum_stats(struct lnet_element_stats *stats,
1038 enum lnet_stats_type stats_type);
1040 void lnet_usr_translate_stats(struct lnet_ioctl_element_msg_stats *msg_stats,
1041 struct lnet_element_stats *stats);