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
77 /* default timeout and credits */
78 #define DEFAULT_PEER_TIMEOUT 180
79 #define DEFAULT_PEER_CREDITS 8
80 #define DEFAULT_CREDITS 256
82 #ifdef HAVE_KERN_SOCK_GETNAME_2ARGS
83 #define lnet_kernel_getpeername(sock, addr, addrlen) \
84 kernel_getpeername(sock, addr)
85 #define lnet_kernel_getsockname(sock, addr, addrlen) \
86 kernel_getsockname(sock, addr)
88 #define lnet_kernel_getpeername(sock, addr, addrlen) \
89 kernel_getpeername(sock, addr, addrlen)
90 #define lnet_kernel_getsockname(sock, addr, addrlen) \
91 kernel_getsockname(sock, addr, addrlen)
95 * kernel 5.3: commit ef11db3310e272d3d8dbe8739e0770820dd20e52
96 * kernel 4.18.0-193.el8:
97 * added in_dev_for_each_ifa_rtnl and in_dev_for_each_ifa_rcu
98 * and removed for_ifa and endfor_ifa.
99 * Use the _rntl variant as the current locking is rtnl.
101 #ifdef HAVE_IN_DEV_FOR_EACH_IFA_RTNL
102 #define DECLARE_CONST_IN_IFADDR(ifa) const struct in_ifaddr *ifa
103 #define endfor_ifa(in_dev)
105 #define DECLARE_CONST_IN_IFADDR(ifa)
106 #define in_dev_for_each_ifa_rtnl(ifa, in_dev) for_ifa((in_dev))
107 #define in_dev_for_each_ifa_rcu(ifa, in_dev) for_ifa((in_dev))
110 int choose_ipv4_src(__u32 *ret,
111 int interface, __u32 dst_ipaddr, struct net *ns);
113 bool lnet_is_route_alive(struct lnet_route *route);
114 bool lnet_is_gateway_alive(struct lnet_peer *gw);
116 static inline int lnet_is_wire_handle_none(struct lnet_handle_wire *wh)
118 return (wh->wh_interface_cookie == LNET_WIRE_HANDLE_COOKIE_NONE &&
119 wh->wh_object_cookie == LNET_WIRE_HANDLE_COOKIE_NONE);
122 static inline int lnet_md_exhausted(struct lnet_libmd *md)
124 return (md->md_threshold == 0 ||
125 ((md->md_options & LNET_MD_MAX_SIZE) != 0 &&
126 md->md_offset + md->md_max_size > md->md_length));
129 static inline int lnet_md_unlinkable(struct lnet_libmd *md)
131 /* Should unlink md when its refcount is 0 and either:
132 * - md has been flagged for deletion (by auto unlink or LNetM[DE]Unlink,
133 * in the latter case md may not be exhausted).
134 * - auto unlink is on and md is exhausted.
136 if (md->md_refcount != 0)
139 if ((md->md_flags & LNET_MD_FLAG_ZOMBIE) != 0)
142 return ((md->md_flags & LNET_MD_FLAG_AUTO_UNLINK) != 0 &&
143 lnet_md_exhausted(md));
146 #define lnet_cpt_table() (the_lnet.ln_cpt_table)
147 #define lnet_cpt_current() cfs_cpt_current(the_lnet.ln_cpt_table, 1)
150 lnet_cpt_of_cookie(__u64 cookie)
152 unsigned int cpt = (cookie >> LNET_COOKIE_TYPE_BITS) & LNET_CPT_MASK;
154 /* LNET_CPT_NUMBER doesn't have to be power2, which means we can
155 * get illegal cpt from it's invalid cookie */
156 return cpt < LNET_CPT_NUMBER ? cpt : cpt % LNET_CPT_NUMBER;
160 lnet_res_lock(int cpt)
162 cfs_percpt_lock(the_lnet.ln_res_lock, cpt);
166 lnet_res_unlock(int cpt)
168 cfs_percpt_unlock(the_lnet.ln_res_lock, cpt);
172 lnet_res_lock_current(void)
174 int cpt = lnet_cpt_current();
181 lnet_net_lock(int cpt)
183 cfs_percpt_lock(the_lnet.ln_net_lock, cpt);
187 lnet_net_unlock(int cpt)
189 cfs_percpt_unlock(the_lnet.ln_net_lock, cpt);
193 lnet_net_lock_current(void)
195 int cpt = lnet_cpt_current();
201 #define LNET_LOCK() lnet_net_lock(LNET_LOCK_EX)
202 #define LNET_UNLOCK() lnet_net_unlock(LNET_LOCK_EX)
204 #define lnet_ptl_lock(ptl) spin_lock(&(ptl)->ptl_lock)
205 #define lnet_ptl_unlock(ptl) spin_unlock(&(ptl)->ptl_lock)
206 #define lnet_ni_lock(ni) spin_lock(&(ni)->ni_lock)
207 #define lnet_ni_unlock(ni) spin_unlock(&(ni)->ni_lock)
209 #define MAX_PORTALS 64
211 #define LNET_SMALL_MD_SIZE offsetof(struct lnet_libmd, md_kiov[1])
212 extern struct kmem_cache *lnet_mes_cachep; /* MEs kmem_cache */
213 extern struct kmem_cache *lnet_small_mds_cachep; /* <= LNET_SMALL_MD_SIZE bytes
215 extern struct kmem_cache *lnet_rspt_cachep;
216 extern struct kmem_cache *lnet_msg_cachep;
219 lnet_ni_set_status_locked(struct lnet_ni *ni, __u32 status)
220 __must_hold(&ni->ni_lock)
224 if (ni->ni_status && ni->ni_status->ns_status != status) {
225 CDEBUG(D_NET, "ni %s status changed from %#x to %#x\n",
226 libcfs_nid2str(ni->ni_nid),
227 ni->ni_status->ns_status, status);
228 ni->ni_status->ns_status = status;
236 lnet_ni_set_status(struct lnet_ni *ni, __u32 status)
241 update = lnet_ni_set_status_locked(ni, status);
248 lnet_md_free(struct lnet_libmd *md)
252 LASSERTF(md->md_rspt_ptr == NULL, "md %p rsp %p\n", md, md->md_rspt_ptr);
254 size = offsetof(struct lnet_libmd, md_kiov[md->md_niov]);
256 if (size <= LNET_SMALL_MD_SIZE) {
257 CDEBUG(D_MALLOC, "slab-freed 'md' at %p.\n", md);
258 kmem_cache_free(lnet_small_mds_cachep, md);
260 LIBCFS_FREE(md, size);
264 struct lnet_libhandle *lnet_res_lh_lookup(struct lnet_res_container *rec,
266 void lnet_res_lh_initialize(struct lnet_res_container *rec,
267 struct lnet_libhandle *lh);
269 lnet_res_lh_invalidate(struct lnet_libhandle *lh)
271 /* ALWAYS called with resource lock held */
272 /* NB: cookie is still useful, don't reset it */
273 list_del(&lh->lh_hash_chain);
277 lnet_md2handle(struct lnet_handle_md *handle, struct lnet_libmd *md)
279 handle->cookie = md->md_lh.lh_cookie;
282 static inline struct lnet_libmd *
283 lnet_handle2md(struct lnet_handle_md *handle)
285 /* ALWAYS called with resource lock held */
286 struct lnet_libhandle *lh;
289 cpt = lnet_cpt_of_cookie(handle->cookie);
290 lh = lnet_res_lh_lookup(the_lnet.ln_md_containers[cpt],
295 return lh_entry(lh, struct lnet_libmd, md_lh);
298 static inline struct lnet_libmd *
299 lnet_wire_handle2md(struct lnet_handle_wire *wh)
301 /* ALWAYS called with resource lock held */
302 struct lnet_libhandle *lh;
305 if (wh->wh_interface_cookie != the_lnet.ln_interface_cookie)
308 cpt = lnet_cpt_of_cookie(wh->wh_object_cookie);
309 lh = lnet_res_lh_lookup(the_lnet.ln_md_containers[cpt],
310 wh->wh_object_cookie);
314 return lh_entry(lh, struct lnet_libmd, md_lh);
318 lnet_peer_net_addref_locked(struct lnet_peer_net *lpn)
320 atomic_inc(&lpn->lpn_refcount);
323 extern void lnet_destroy_peer_net_locked(struct lnet_peer_net *lpn);
326 lnet_peer_net_decref_locked(struct lnet_peer_net *lpn)
328 if (atomic_dec_and_test(&lpn->lpn_refcount))
329 lnet_destroy_peer_net_locked(lpn);
333 lnet_peer_addref_locked(struct lnet_peer *lp)
335 atomic_inc(&lp->lp_refcount);
338 extern void lnet_destroy_peer_locked(struct lnet_peer *lp);
341 lnet_peer_decref_locked(struct lnet_peer *lp)
343 if (atomic_dec_and_test(&lp->lp_refcount))
344 lnet_destroy_peer_locked(lp);
348 lnet_peer_ni_addref_locked(struct lnet_peer_ni *lp)
350 LASSERT(atomic_read(&lp->lpni_refcount) > 0);
351 atomic_inc(&lp->lpni_refcount);
354 extern void lnet_destroy_peer_ni_locked(struct lnet_peer_ni *lp);
357 lnet_peer_ni_decref_locked(struct lnet_peer_ni *lp)
359 LASSERT(atomic_read(&lp->lpni_refcount) > 0);
360 if (atomic_dec_and_test(&lp->lpni_refcount))
361 lnet_destroy_peer_ni_locked(lp);
365 lnet_isrouter(struct lnet_peer_ni *lpni)
367 return lpni->lpni_peer_net->lpn_peer->lp_rtr_refcount != 0;
371 lnet_ni_addref_locked(struct lnet_ni *ni, int cpt)
373 LASSERT(cpt >= 0 && cpt < LNET_CPT_NUMBER);
374 LASSERT(*ni->ni_refs[cpt] >= 0);
376 (*ni->ni_refs[cpt])++;
380 lnet_ni_addref(struct lnet_ni *ni)
383 lnet_ni_addref_locked(ni, 0);
388 lnet_ni_decref_locked(struct lnet_ni *ni, int cpt)
390 LASSERT(cpt >= 0 && cpt < LNET_CPT_NUMBER);
391 LASSERT(*ni->ni_refs[cpt] > 0);
393 (*ni->ni_refs[cpt])--;
397 lnet_ni_decref(struct lnet_ni *ni)
400 lnet_ni_decref_locked(ni, 0);
404 static inline struct lnet_msg *
407 struct lnet_msg *msg;
409 msg = kmem_cache_zalloc(lnet_msg_cachep, GFP_NOFS);
415 lnet_msg_free(struct lnet_msg *msg)
417 LASSERT(!msg->msg_onactivelist);
418 kmem_cache_free(lnet_msg_cachep, msg);
421 static inline struct lnet_rsp_tracker *
422 lnet_rspt_alloc(int cpt)
424 struct lnet_rsp_tracker *rspt;
426 rspt = kmem_cache_zalloc(lnet_rspt_cachep, GFP_NOFS);
429 the_lnet.ln_counters[cpt]->lct_health.lch_rst_alloc++;
430 lnet_net_unlock(cpt);
432 CDEBUG(D_MALLOC, "rspt alloc %p\n", rspt);
437 lnet_rspt_free(struct lnet_rsp_tracker *rspt, int cpt)
439 CDEBUG(D_MALLOC, "rspt free %p\n", rspt);
441 kmem_cache_free(lnet_rspt_cachep, rspt);
443 the_lnet.ln_counters[cpt]->lct_health.lch_rst_alloc--;
444 lnet_net_unlock(cpt);
447 void lnet_ni_free(struct lnet_ni *ni);
448 void lnet_net_free(struct lnet_net *net);
451 lnet_net_alloc(__u32 net_type, struct list_head *netlist);
454 lnet_ni_alloc(struct lnet_net *net, struct cfs_expr_list *el,
457 lnet_ni_alloc_w_cpt_array(struct lnet_net *net, __u32 *cpts, __u32 ncpts,
461 lnet_nid2peerhash(lnet_nid_t nid)
463 return hash_long(nid, LNET_PEER_HASH_BITS);
466 static inline struct list_head *
467 lnet_net2rnethash(__u32 net)
469 return &the_lnet.ln_remote_nets_hash[(LNET_NETNUM(net) +
471 ((1U << the_lnet.ln_remote_nets_hbits) - 1)];
474 extern const struct lnet_lnd the_lolnd;
475 extern int avoid_asym_router_failure;
477 extern unsigned int lnet_nid_cpt_hash(lnet_nid_t nid, unsigned int number);
478 extern int lnet_cpt_of_nid_locked(lnet_nid_t nid, struct lnet_ni *ni);
479 extern int lnet_cpt_of_nid(lnet_nid_t nid, struct lnet_ni *ni);
480 extern struct lnet_ni *lnet_nid2ni_locked(lnet_nid_t nid, int cpt);
481 extern struct lnet_ni *lnet_nid2ni_addref(lnet_nid_t nid);
482 extern struct lnet_ni *lnet_net2ni_locked(__u32 net, int cpt);
483 extern struct lnet_ni *lnet_net2ni_addref(__u32 net);
484 struct lnet_net *lnet_get_net_locked(__u32 net_id);
486 int lnet_lib_init(void);
487 void lnet_lib_exit(void);
489 extern unsigned int lnet_response_tracking;
490 extern unsigned lnet_transaction_timeout;
491 extern unsigned lnet_retry_count;
492 extern unsigned int lnet_lnd_timeout;
493 extern unsigned int lnet_numa_range;
494 extern unsigned int lnet_health_sensitivity;
495 extern unsigned int lnet_recovery_interval;
496 extern unsigned int lnet_peer_discovery_disabled;
497 extern unsigned int lnet_drop_asym_route;
498 extern unsigned int router_sensitivity_percentage;
499 extern int alive_router_check_interval;
500 extern int live_router_check_interval;
501 extern int dead_router_check_interval;
502 extern int portal_rotor;
504 void lnet_mt_event_handler(struct lnet_event *event);
506 int lnet_notify(struct lnet_ni *ni, lnet_nid_t peer, bool alive, bool reset,
508 void lnet_notify_locked(struct lnet_peer_ni *lp, int notifylnd, int alive,
510 int lnet_add_route(__u32 net, __u32 hops, lnet_nid_t gateway_nid,
511 __u32 priority, __u32 sensitivity);
512 int lnet_del_route(__u32 net, lnet_nid_t gw_nid);
513 void lnet_move_route(struct lnet_route *route, struct lnet_peer *lp,
514 struct list_head *rt_list);
515 void lnet_destroy_routes(void);
516 int lnet_get_route(int idx, __u32 *net, __u32 *hops,
517 lnet_nid_t *gateway, __u32 *alive, __u32 *priority,
519 int lnet_get_rtr_pool_cfg(int idx, struct lnet_ioctl_pool_cfg *pool_cfg);
520 struct lnet_ni *lnet_get_next_ni_locked(struct lnet_net *mynet,
521 struct lnet_ni *prev);
522 struct lnet_ni *lnet_get_ni_idx_locked(int idx);
524 extern int libcfs_ioctl_getdata(struct libcfs_ioctl_hdr **hdr_pp,
525 struct libcfs_ioctl_hdr __user *uparam);
526 extern int lnet_get_peer_list(__u32 *countp, __u32 *sizep,
527 struct lnet_process_id __user *ids);
528 extern void lnet_peer_ni_set_healthv(lnet_nid_t nid, int value, bool all);
529 extern void lnet_peer_ni_add_to_recoveryq_locked(struct lnet_peer_ni *lpni);
531 void lnet_router_debugfs_init(void);
532 void lnet_router_debugfs_fini(void);
533 int lnet_rtrpools_alloc(int im_a_router);
534 void lnet_destroy_rtrbuf(struct lnet_rtrbuf *rb, int npages);
535 int lnet_rtrpools_adjust(int tiny, int small, int large);
536 int lnet_rtrpools_enable(void);
537 void lnet_rtrpools_disable(void);
538 void lnet_rtrpools_free(int keep_pools);
539 void lnet_rtr_transfer_to_peer(struct lnet_peer *src,
540 struct lnet_peer *target);
541 struct lnet_remotenet *lnet_find_rnet_locked(__u32 net);
542 int lnet_dyn_add_net(struct lnet_ioctl_config_data *conf);
543 int lnet_dyn_del_net(__u32 net);
544 int lnet_dyn_add_ni(struct lnet_ioctl_config_ni *conf);
545 int lnet_dyn_del_ni(struct lnet_ioctl_config_ni *conf);
546 int lnet_clear_lazy_portal(struct lnet_ni *ni, int portal, char *reason);
547 struct lnet_net *lnet_get_net_locked(__u32 net_id);
549 int lnet_islocalnid(lnet_nid_t nid);
550 int lnet_islocalnet(__u32 net);
551 int lnet_islocalnet_locked(__u32 net);
553 void lnet_msg_attach_md(struct lnet_msg *msg, struct lnet_libmd *md,
554 unsigned int offset, unsigned int mlen);
555 void lnet_build_unlink_event(struct lnet_libmd *md, struct lnet_event *ev);
556 void lnet_build_msg_event(struct lnet_msg *msg, enum lnet_event_kind ev_type);
557 void lnet_msg_commit(struct lnet_msg *msg, int cpt);
558 void lnet_msg_decommit(struct lnet_msg *msg, int cpt, int status);
560 void lnet_prep_send(struct lnet_msg *msg, int type,
561 struct lnet_process_id target, unsigned int offset,
563 int lnet_send(lnet_nid_t nid, struct lnet_msg *msg, lnet_nid_t rtr_nid);
564 int lnet_send_ping(lnet_nid_t dest_nid, struct lnet_handle_md *mdh, int nnis,
565 void *user_ptr, lnet_handler_t handler, bool recovery);
566 void lnet_return_tx_credits_locked(struct lnet_msg *msg);
567 void lnet_return_rx_credits_locked(struct lnet_msg *msg);
568 void lnet_schedule_blocked_locked(struct lnet_rtrbufpool *rbp);
569 void lnet_drop_routed_msgs_locked(struct list_head *list, int cpt);
571 struct list_head **lnet_create_array_of_queues(void);
573 /* portals functions */
574 /* portals attributes */
576 lnet_ptl_is_lazy(struct lnet_portal *ptl)
578 return !!(ptl->ptl_options & LNET_PTL_LAZY);
582 lnet_ptl_is_unique(struct lnet_portal *ptl)
584 return !!(ptl->ptl_options & LNET_PTL_MATCH_UNIQUE);
588 lnet_ptl_is_wildcard(struct lnet_portal *ptl)
590 return !!(ptl->ptl_options & LNET_PTL_MATCH_WILDCARD);
594 lnet_ptl_setopt(struct lnet_portal *ptl, int opt)
596 ptl->ptl_options |= opt;
600 lnet_ptl_unsetopt(struct lnet_portal *ptl, int opt)
602 ptl->ptl_options &= ~opt;
605 /* match-table functions */
606 struct list_head *lnet_mt_match_head(struct lnet_match_table *mtable,
607 struct lnet_process_id id, __u64 mbits);
608 struct lnet_match_table *lnet_mt_of_attach(unsigned int index,
609 struct lnet_process_id id,
610 __u64 mbits, __u64 ignore_bits,
611 enum lnet_ins_pos pos);
612 int lnet_mt_match_md(struct lnet_match_table *mtable,
613 struct lnet_match_info *info, struct lnet_msg *msg);
615 /* portals match/attach functions */
616 void lnet_ptl_attach_md(struct lnet_me *me, struct lnet_libmd *md,
617 struct list_head *matches, struct list_head *drops);
618 void lnet_ptl_detach_md(struct lnet_me *me, struct lnet_libmd *md);
619 int lnet_ptl_match_md(struct lnet_match_info *info, struct lnet_msg *msg);
621 /* initialized and finalize portals */
622 int lnet_portals_create(void);
623 void lnet_portals_destroy(void);
625 /* message functions */
626 int lnet_parse(struct lnet_ni *ni, struct lnet_hdr *hdr,
627 lnet_nid_t fromnid, void *private, int rdma_req);
628 int lnet_parse_local(struct lnet_ni *ni, struct lnet_msg *msg);
629 int lnet_parse_forward_locked(struct lnet_ni *ni, struct lnet_msg *msg);
631 void lnet_recv(struct lnet_ni *ni, void *private, struct lnet_msg *msg,
632 int delayed, unsigned int offset, unsigned int mlen,
634 void lnet_ni_recv(struct lnet_ni *ni, void *private, struct lnet_msg *msg,
635 int delayed, unsigned int offset,
636 unsigned int mlen, unsigned int rlen);
638 struct lnet_msg *lnet_create_reply_msg(struct lnet_ni *ni,
639 struct lnet_msg *get_msg);
640 void lnet_set_reply_msg_len(struct lnet_ni *ni, struct lnet_msg *msg,
642 void lnet_detach_rsp_tracker(struct lnet_libmd *md, int cpt);
643 void lnet_clean_zombie_rstqs(void);
645 void lnet_finalize(struct lnet_msg *msg, int rc);
646 bool lnet_send_error_simulation(struct lnet_msg *msg,
647 enum lnet_msg_hstatus *hstatus);
648 void lnet_handle_remote_failure_locked(struct lnet_peer_ni *lpni);
650 void lnet_drop_message(struct lnet_ni *ni, int cpt, void *private,
651 unsigned int nob, __u32 msg_type);
652 void lnet_drop_delayed_msg_list(struct list_head *head, char *reason);
653 void lnet_recv_delayed_msg_list(struct list_head *head);
655 int lnet_msg_container_setup(struct lnet_msg_container *container, int cpt);
656 void lnet_msg_container_cleanup(struct lnet_msg_container *container);
657 void lnet_msg_containers_destroy(void);
658 int lnet_msg_containers_create(void);
660 char *lnet_health_error2str(enum lnet_msg_hstatus hstatus);
661 char *lnet_msgtyp2str(int type);
662 int lnet_fail_nid(lnet_nid_t nid, unsigned int threshold);
664 /** \addtogroup lnet_fault_simulation @{ */
666 int lnet_fault_ctl(int cmd, struct libcfs_ioctl_data *data);
667 int lnet_fault_init(void);
668 void lnet_fault_fini(void);
670 bool lnet_drop_rule_match(struct lnet_hdr *hdr, lnet_nid_t local_nid,
671 enum lnet_msg_hstatus *hstatus);
673 int lnet_delay_rule_add(struct lnet_fault_attr *attr);
674 int lnet_delay_rule_del(lnet_nid_t src, lnet_nid_t dst, bool shutdown);
675 int lnet_delay_rule_list(int pos, struct lnet_fault_attr *attr,
676 struct lnet_fault_stat *stat);
677 void lnet_delay_rule_reset(void);
678 void lnet_delay_rule_check(void);
679 bool lnet_delay_rule_match_locked(struct lnet_hdr *hdr, struct lnet_msg *msg);
681 /** @} lnet_fault_simulation */
683 void lnet_counters_get_common(struct lnet_counters_common *common);
684 void lnet_counters_get(struct lnet_counters *counters);
685 void lnet_counters_reset(void);
687 unsigned int lnet_iov_nob(unsigned int niov, struct kvec *iov);
688 unsigned int lnet_kiov_nob(unsigned int niov, struct bio_vec *iov);
689 int lnet_extract_kiov(int dst_niov, struct bio_vec *dst,
690 int src_niov, struct bio_vec *src,
691 unsigned int offset, unsigned int len);
693 void lnet_copy_iov2iov(unsigned int ndiov, struct kvec *diov,
694 unsigned int doffset,
695 unsigned int nsiov, struct kvec *siov,
696 unsigned int soffset, unsigned int nob);
697 void lnet_copy_kiov2iov(unsigned int niov, struct kvec *iov,
698 unsigned int iovoffset,
699 unsigned int nkiov, struct bio_vec *kiov,
700 unsigned int kiovoffset, unsigned int nob);
701 void lnet_copy_iov2kiov(unsigned int nkiov, struct bio_vec *kiov,
702 unsigned int kiovoffset,
703 unsigned int niov, struct kvec *iov,
704 unsigned int iovoffset, unsigned int nob);
705 void lnet_copy_kiov2kiov(unsigned int ndkiov, struct bio_vec *dkiov,
706 unsigned int doffset,
707 unsigned int nskiov, struct bio_vec *skiov,
708 unsigned int soffset, unsigned int nob);
711 lnet_copy_kiov2flat(int dlen, void *dest, unsigned int doffset,
712 unsigned int nsiov, struct bio_vec *skiov,
713 unsigned int soffset, unsigned int nob)
715 struct kvec diov = { .iov_base = dest, .iov_len = dlen };
717 lnet_copy_kiov2iov(1, &diov, doffset,
718 nsiov, skiov, soffset, nob);
722 lnet_copy_flat2kiov(unsigned int ndiov, struct bio_vec *dkiov,
723 unsigned int doffset, int slen, void *src,
724 unsigned int soffset, unsigned int nob)
726 struct kvec siov = { .iov_base = src, .iov_len = slen };
727 lnet_copy_iov2kiov(ndiov, dkiov, doffset,
728 1, &siov, soffset, nob);
731 void lnet_me_unlink(struct lnet_me *me);
733 void lnet_md_unlink(struct lnet_libmd *md);
734 void lnet_md_deconstruct(struct lnet_libmd *lmd, struct lnet_event *ev);
735 struct page *lnet_kvaddr_to_page(unsigned long vaddr);
736 int lnet_cpt_of_md(struct lnet_libmd *md, unsigned int offset);
738 unsigned int lnet_get_lnd_timeout(void);
739 void lnet_register_lnd(const struct lnet_lnd *lnd);
740 void lnet_unregister_lnd(const struct lnet_lnd *lnd);
742 struct socket *lnet_connect(lnet_nid_t peer_nid, int interface, __u32 peer_ip,
743 int peer_port, struct net *ns);
744 void lnet_connect_console_error(int rc, lnet_nid_t peer_nid,
745 __u32 peer_ip, int port);
746 int lnet_count_acceptor_nets(void);
747 int lnet_acceptor_timeout(void);
748 int lnet_acceptor_port(void);
749 int lnet_acceptor_start(void);
750 void lnet_acceptor_stop(void);
752 struct lnet_inetdev {
757 char li_name[IFNAMSIZ];
760 int lnet_inet_enumerate(struct lnet_inetdev **dev_list, struct net *ns);
761 int lnet_sock_setbuf(struct socket *socket, int txbufsize, int rxbufsize);
762 int lnet_sock_getbuf(struct socket *socket, int *txbufsize, int *rxbufsize);
763 int lnet_sock_getaddr(struct socket *socket, bool remote, __u32 *ip, int *port);
764 int lnet_sock_write(struct socket *sock, void *buffer, int nob, int timeout);
765 int lnet_sock_read(struct socket *sock, void *buffer, int nob, int timeout);
767 struct socket *lnet_sock_listen(int port, int backlog,
769 struct socket *lnet_sock_connect(int interface, int local_port,
770 struct sockaddr *peeraddr,
773 int lnet_peers_start_down(void);
774 int lnet_peer_buffer_credits(struct lnet_net *net);
775 void lnet_consolidate_routes_locked(struct lnet_peer *orig_lp,
776 struct lnet_peer *new_lp);
777 void lnet_router_discovery_complete(struct lnet_peer *lp);
778 void lnet_router_discovery_ping_reply(struct lnet_peer *lp);
780 int lnet_monitor_thr_start(void);
781 void lnet_monitor_thr_stop(void);
783 bool lnet_router_checker_active(void);
784 void lnet_check_routers(void);
785 void lnet_wait_router_start(void);
786 void lnet_swap_pinginfo(struct lnet_ping_buffer *pbuf);
788 int lnet_ping_info_validate(struct lnet_ping_info *pinfo);
789 struct lnet_ping_buffer *lnet_ping_buffer_alloc(int nnis, gfp_t gfp);
790 void lnet_ping_buffer_free(struct lnet_ping_buffer *pbuf);
792 static inline void lnet_ping_buffer_addref(struct lnet_ping_buffer *pbuf)
794 atomic_inc(&pbuf->pb_refcnt);
797 static inline void lnet_ping_buffer_decref(struct lnet_ping_buffer *pbuf)
799 if (atomic_dec_and_test(&pbuf->pb_refcnt)) {
800 wake_up_var(&pbuf->pb_refcnt);
801 lnet_ping_buffer_free(pbuf);
805 static inline int lnet_push_target_resize_needed(void)
807 return the_lnet.ln_push_target->pb_nnis < the_lnet.ln_push_target_nnis;
810 int lnet_push_target_resize(void);
811 int lnet_push_target_post(struct lnet_ping_buffer *pbuf,
812 struct lnet_handle_md *mdh);
813 void lnet_peer_push_event(struct lnet_event *ev);
815 int lnet_parse_ip2nets(const char **networksp, const char *ip2nets);
816 int lnet_parse_routes(const char *route_str, int *im_a_router);
817 int lnet_parse_networks(struct list_head *nilist, const char *networks,
818 bool use_tcp_bonding);
819 bool lnet_net_unique(__u32 net_id, struct list_head *nilist,
820 struct lnet_net **net);
821 bool lnet_ni_unique_net(struct list_head *nilist, char *iface);
822 void lnet_incr_dlc_seq(void);
823 __u32 lnet_get_dlc_seq_locked(void);
824 int lnet_get_net_count(void);
825 extern unsigned int lnet_current_net_count;
827 struct lnet_peer_net *lnet_get_next_peer_net_locked(struct lnet_peer *lp,
829 struct lnet_peer_ni *lnet_get_next_peer_ni_locked(struct lnet_peer *peer,
830 struct lnet_peer_net *peer_net,
831 struct lnet_peer_ni *prev);
832 struct lnet_peer_ni *lnet_nid2peerni_locked(lnet_nid_t nid, lnet_nid_t pref,
834 struct lnet_peer_ni *lnet_nid2peerni_ex(lnet_nid_t nid, int cpt);
835 struct lnet_peer_ni *lnet_peer_get_ni_locked(struct lnet_peer *lp,
837 struct lnet_peer_ni *lnet_find_peer_ni_locked(lnet_nid_t nid);
838 struct lnet_peer *lnet_find_peer(lnet_nid_t nid);
839 void lnet_peer_net_added(struct lnet_net *net);
840 lnet_nid_t lnet_peer_primary_nid_locked(lnet_nid_t nid);
841 int lnet_discover_peer_locked(struct lnet_peer_ni *lpni, int cpt, bool block);
842 int lnet_peer_discovery_start(void);
843 void lnet_peer_discovery_stop(void);
844 void lnet_push_update_to_peers(int force);
845 void lnet_peer_tables_cleanup(struct lnet_net *net);
846 void lnet_peer_uninit(void);
847 int lnet_peer_tables_create(void);
848 void lnet_debug_peer(lnet_nid_t nid);
849 struct lnet_peer_net *lnet_peer_get_net_locked(struct lnet_peer *peer,
851 bool lnet_peer_is_pref_nid_locked(struct lnet_peer_ni *lpni, lnet_nid_t nid);
852 int lnet_peer_ni_set_non_mr_pref_nid(struct lnet_peer_ni *lpni, lnet_nid_t nid);
853 int lnet_add_peer_ni(lnet_nid_t key_nid, lnet_nid_t nid, bool mr);
854 int lnet_del_peer_ni(lnet_nid_t key_nid, lnet_nid_t nid);
855 int lnet_get_peer_info(struct lnet_ioctl_peer_cfg *cfg, void __user *bulk);
856 int lnet_get_peer_ni_info(__u32 peer_index, __u64 *nid,
857 char alivness[LNET_MAX_STR_LEN],
858 __u32 *cpt_iter, __u32 *refcount,
859 __u32 *ni_peer_tx_credits, __u32 *peer_tx_credits,
860 __u32 *peer_rtr_credits, __u32 *peer_min_rtr_credtis,
861 __u32 *peer_tx_qnob);
862 int lnet_get_peer_ni_hstats(struct lnet_ioctl_peer_ni_hstats *stats);
864 static inline struct lnet_peer_net *
865 lnet_find_peer_net_locked(struct lnet_peer *peer, __u32 net_id)
867 struct lnet_peer_net *peer_net;
869 list_for_each_entry(peer_net, &peer->lp_peer_nets, lpn_peer_nets) {
870 if (peer_net->lpn_net_id == net_id)
878 lnet_peer_is_multi_rail(struct lnet_peer *lp)
880 if (lp->lp_state & LNET_PEER_MULTI_RAIL)
886 lnet_peer_ni_is_configured(struct lnet_peer_ni *lpni)
888 if (lpni->lpni_peer_net->lpn_peer->lp_state & LNET_PEER_CONFIGURED)
894 lnet_peer_ni_is_primary(struct lnet_peer_ni *lpni)
896 return lpni->lpni_nid == lpni->lpni_peer_net->lpn_peer->lp_primary_nid;
899 bool lnet_peer_is_uptodate(struct lnet_peer *lp);
900 bool lnet_peer_is_uptodate_locked(struct lnet_peer *lp);
901 bool lnet_is_discovery_disabled(struct lnet_peer *lp);
902 bool lnet_is_discovery_disabled_locked(struct lnet_peer *lp);
903 bool lnet_peer_gw_discovery(struct lnet_peer *lp);
906 lnet_peer_needs_push(struct lnet_peer *lp)
908 if (!(lp->lp_state & LNET_PEER_MULTI_RAIL))
910 if (lp->lp_state & LNET_PEER_FORCE_PUSH)
912 if (lp->lp_state & LNET_PEER_NO_DISCOVERY)
914 /* if discovery is not enabled then no need to push */
915 if (lnet_peer_discovery_disabled)
917 if (lp->lp_node_seqno < atomic_read(&the_lnet.ln_ping_target_seqno))
923 * A peer NI is alive if it satisfies the following two conditions:
924 * 1. peer NI health >= LNET_MAX_HEALTH_VALUE * router_sensitivity_percentage
925 * 2. the cached NI status received when we discover the peer is UP
928 lnet_is_peer_ni_alive(struct lnet_peer_ni *lpni)
932 halive = (atomic_read(&lpni->lpni_healthv) >=
933 (LNET_MAX_HEALTH_VALUE * router_sensitivity_percentage / 100));
935 return halive && lpni->lpni_ns_status == LNET_NI_STATUS_UP;
939 lnet_update_peer_net_healthv(struct lnet_peer_ni *lpni)
941 struct lnet_peer_net *lpn;
942 int best_healthv = 0;
944 lpn = lpni->lpni_peer_net;
946 list_for_each_entry(lpni, &lpn->lpn_peer_nis, lpni_peer_nis) {
947 int lpni_healthv = atomic_read(&lpni->lpni_healthv);
948 if (best_healthv < lpni_healthv)
949 best_healthv = lpni_healthv;
952 lpn->lpn_healthv = best_healthv;
956 lnet_set_lpni_healthv_locked(struct lnet_peer_ni *lpni, int value)
958 if (atomic_read(&lpni->lpni_healthv) == value)
960 atomic_set(&lpni->lpni_healthv, value);
961 lnet_update_peer_net_healthv(lpni);
965 lnet_atomic_add_unless_max(atomic_t *v, int a, int u)
967 int c = atomic_read(v);
980 old = atomic_cmpxchg(v, c, m);
996 lnet_inc_lpni_healthv_locked(struct lnet_peer_ni *lpni, int value)
998 /* only adjust the net health if the lpni health value changed */
999 if (lnet_atomic_add_unless_max(&lpni->lpni_healthv, value,
1000 LNET_MAX_HEALTH_VALUE))
1001 lnet_update_peer_net_healthv(lpni);
1005 lnet_inc_healthv(atomic_t *healthv, int value)
1007 lnet_atomic_add_unless_max(healthv, value, LNET_MAX_HEALTH_VALUE);
1010 void lnet_incr_stats(struct lnet_element_stats *stats,
1011 enum lnet_msg_type msg_type,
1012 enum lnet_stats_type stats_type);
1014 __u32 lnet_sum_stats(struct lnet_element_stats *stats,
1015 enum lnet_stats_type stats_type);
1017 void lnet_usr_translate_stats(struct lnet_ioctl_element_msg_stats *msg_stats,
1018 struct lnet_element_stats *stats);