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);
247 static inline void lnet_md_wait_handling(struct lnet_libmd *md, int cpt)
249 wait_queue_head_t *wq = __var_waitqueue(md);
250 #ifdef HAVE_WAIT_QUEUE_ENTRY
251 struct wait_bit_queue_entry entry;
252 wait_queue_entry_t *wqe = &entry.wq_entry;
254 struct wait_bit_queue entry;
255 wait_queue_entry_t *wqe = &entry.wait;
257 init_wait_var_entry(&entry, md, 0);
258 prepare_to_wait_event(wq, wqe, TASK_IDLE);
259 if (md->md_flags & LNET_MD_FLAG_HANDLING) {
260 /* Race with unlocked call to ->md_handler.
261 * It is safe to drop the res_lock here as the
262 * caller has only just claimed it.
264 lnet_res_unlock(cpt);
266 /* Cannot check md now, it might be freed. Caller
267 * must reclaim reference and check.
271 finish_wait(wq, wqe);
275 lnet_md_free(struct lnet_libmd *md)
279 LASSERTF(md->md_rspt_ptr == NULL, "md %p rsp %p\n", md, md->md_rspt_ptr);
281 size = offsetof(struct lnet_libmd, md_kiov[md->md_niov]);
283 if (size <= LNET_SMALL_MD_SIZE) {
284 CDEBUG(D_MALLOC, "slab-freed 'md' at %p.\n", md);
285 kmem_cache_free(lnet_small_mds_cachep, md);
287 LIBCFS_FREE(md, size);
291 struct lnet_libhandle *lnet_res_lh_lookup(struct lnet_res_container *rec,
293 void lnet_res_lh_initialize(struct lnet_res_container *rec,
294 struct lnet_libhandle *lh);
296 lnet_res_lh_invalidate(struct lnet_libhandle *lh)
298 /* ALWAYS called with resource lock held */
299 /* NB: cookie is still useful, don't reset it */
300 list_del(&lh->lh_hash_chain);
304 lnet_md2handle(struct lnet_handle_md *handle, struct lnet_libmd *md)
306 handle->cookie = md->md_lh.lh_cookie;
309 static inline struct lnet_libmd *
310 lnet_handle2md(struct lnet_handle_md *handle)
312 /* ALWAYS called with resource lock held */
313 struct lnet_libhandle *lh;
316 cpt = lnet_cpt_of_cookie(handle->cookie);
317 lh = lnet_res_lh_lookup(the_lnet.ln_md_containers[cpt],
322 return lh_entry(lh, struct lnet_libmd, md_lh);
325 static inline struct lnet_libmd *
326 lnet_wire_handle2md(struct lnet_handle_wire *wh)
328 /* ALWAYS called with resource lock held */
329 struct lnet_libhandle *lh;
332 if (wh->wh_interface_cookie != the_lnet.ln_interface_cookie)
335 cpt = lnet_cpt_of_cookie(wh->wh_object_cookie);
336 lh = lnet_res_lh_lookup(the_lnet.ln_md_containers[cpt],
337 wh->wh_object_cookie);
341 return lh_entry(lh, struct lnet_libmd, md_lh);
345 lnet_peer_net_addref_locked(struct lnet_peer_net *lpn)
347 atomic_inc(&lpn->lpn_refcount);
350 extern void lnet_destroy_peer_net_locked(struct lnet_peer_net *lpn);
353 lnet_peer_net_decref_locked(struct lnet_peer_net *lpn)
355 if (atomic_dec_and_test(&lpn->lpn_refcount))
356 lnet_destroy_peer_net_locked(lpn);
360 lnet_peer_addref_locked(struct lnet_peer *lp)
362 atomic_inc(&lp->lp_refcount);
365 extern void lnet_destroy_peer_locked(struct lnet_peer *lp);
368 lnet_peer_decref_locked(struct lnet_peer *lp)
370 if (atomic_dec_and_test(&lp->lp_refcount))
371 lnet_destroy_peer_locked(lp);
375 lnet_peer_ni_addref_locked(struct lnet_peer_ni *lp)
377 LASSERT(atomic_read(&lp->lpni_refcount) > 0);
378 atomic_inc(&lp->lpni_refcount);
381 extern void lnet_destroy_peer_ni_locked(struct lnet_peer_ni *lp);
384 lnet_peer_ni_decref_locked(struct lnet_peer_ni *lp)
386 LASSERT(atomic_read(&lp->lpni_refcount) > 0);
387 if (atomic_dec_and_test(&lp->lpni_refcount))
388 lnet_destroy_peer_ni_locked(lp);
392 lnet_isrouter(struct lnet_peer_ni *lpni)
394 return lpni->lpni_peer_net->lpn_peer->lp_rtr_refcount != 0;
398 lnet_ni_addref_locked(struct lnet_ni *ni, int cpt)
400 LASSERT(cpt >= 0 && cpt < LNET_CPT_NUMBER);
401 LASSERT(*ni->ni_refs[cpt] >= 0);
403 (*ni->ni_refs[cpt])++;
407 lnet_ni_addref(struct lnet_ni *ni)
410 lnet_ni_addref_locked(ni, 0);
415 lnet_ni_decref_locked(struct lnet_ni *ni, int cpt)
417 LASSERT(cpt >= 0 && cpt < LNET_CPT_NUMBER);
418 LASSERT(*ni->ni_refs[cpt] > 0);
420 (*ni->ni_refs[cpt])--;
424 lnet_ni_decref(struct lnet_ni *ni)
427 lnet_ni_decref_locked(ni, 0);
431 static inline struct lnet_msg *
434 struct lnet_msg *msg;
436 msg = kmem_cache_zalloc(lnet_msg_cachep, GFP_NOFS);
442 lnet_msg_free(struct lnet_msg *msg)
444 LASSERT(!msg->msg_onactivelist);
445 kmem_cache_free(lnet_msg_cachep, msg);
448 static inline struct lnet_rsp_tracker *
449 lnet_rspt_alloc(int cpt)
451 struct lnet_rsp_tracker *rspt;
453 rspt = kmem_cache_zalloc(lnet_rspt_cachep, GFP_NOFS);
456 the_lnet.ln_counters[cpt]->lct_health.lch_rst_alloc++;
457 lnet_net_unlock(cpt);
459 CDEBUG(D_MALLOC, "rspt alloc %p\n", rspt);
464 lnet_rspt_free(struct lnet_rsp_tracker *rspt, int cpt)
466 CDEBUG(D_MALLOC, "rspt free %p\n", rspt);
468 kmem_cache_free(lnet_rspt_cachep, rspt);
470 the_lnet.ln_counters[cpt]->lct_health.lch_rst_alloc--;
471 lnet_net_unlock(cpt);
474 void lnet_ni_free(struct lnet_ni *ni);
475 void lnet_net_free(struct lnet_net *net);
478 lnet_net_alloc(__u32 net_type, struct list_head *netlist);
481 lnet_ni_alloc(struct lnet_net *net, struct cfs_expr_list *el,
484 lnet_ni_alloc_w_cpt_array(struct lnet_net *net, __u32 *cpts, __u32 ncpts,
488 lnet_nid2peerhash(lnet_nid_t nid)
490 return hash_long(nid, LNET_PEER_HASH_BITS);
493 static inline struct list_head *
494 lnet_net2rnethash(__u32 net)
496 return &the_lnet.ln_remote_nets_hash[(LNET_NETNUM(net) +
498 ((1U << the_lnet.ln_remote_nets_hbits) - 1)];
501 extern const struct lnet_lnd the_lolnd;
502 extern int avoid_asym_router_failure;
504 extern unsigned int lnet_nid_cpt_hash(lnet_nid_t nid, unsigned int number);
505 extern int lnet_cpt_of_nid_locked(lnet_nid_t nid, struct lnet_ni *ni);
506 extern int lnet_cpt_of_nid(lnet_nid_t nid, struct lnet_ni *ni);
507 extern struct lnet_ni *lnet_nid2ni_locked(lnet_nid_t nid, int cpt);
508 extern struct lnet_ni *lnet_nid2ni_addref(lnet_nid_t nid);
509 extern struct lnet_ni *lnet_net2ni_locked(__u32 net, int cpt);
510 extern struct lnet_ni *lnet_net2ni_addref(__u32 net);
511 struct lnet_net *lnet_get_net_locked(__u32 net_id);
513 int lnet_lib_init(void);
514 void lnet_lib_exit(void);
516 extern unsigned int lnet_response_tracking;
517 extern unsigned lnet_transaction_timeout;
518 extern unsigned lnet_retry_count;
519 extern unsigned int lnet_lnd_timeout;
520 extern unsigned int lnet_numa_range;
521 extern unsigned int lnet_health_sensitivity;
522 extern unsigned int lnet_recovery_interval;
523 extern unsigned int lnet_recovery_limit;
524 extern unsigned int lnet_peer_discovery_disabled;
525 extern unsigned int lnet_drop_asym_route;
526 extern unsigned int router_sensitivity_percentage;
527 extern int alive_router_check_interval;
528 extern int live_router_check_interval;
529 extern int dead_router_check_interval;
530 extern int portal_rotor;
532 void lnet_mt_event_handler(struct lnet_event *event);
534 int lnet_notify(struct lnet_ni *ni, lnet_nid_t peer, bool alive, bool reset,
536 void lnet_notify_locked(struct lnet_peer_ni *lp, int notifylnd, int alive,
538 int lnet_add_route(__u32 net, __u32 hops, lnet_nid_t gateway_nid,
539 __u32 priority, __u32 sensitivity);
540 int lnet_del_route(__u32 net, lnet_nid_t gw_nid);
541 void lnet_move_route(struct lnet_route *route, struct lnet_peer *lp,
542 struct list_head *rt_list);
543 void lnet_destroy_routes(void);
544 int lnet_get_route(int idx, __u32 *net, __u32 *hops,
545 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);
551 int lnet_get_net_healthv_locked(struct lnet_net *net);
553 extern int libcfs_ioctl_getdata(struct libcfs_ioctl_hdr **hdr_pp,
554 struct libcfs_ioctl_hdr __user *uparam);
555 extern int lnet_get_peer_list(__u32 *countp, __u32 *sizep,
556 struct lnet_process_id __user *ids);
557 extern void lnet_peer_ni_set_healthv(lnet_nid_t nid, int value, bool all);
558 extern void lnet_peer_ni_add_to_recoveryq_locked(struct lnet_peer_ni *lpni);
560 void lnet_router_debugfs_init(void);
561 void lnet_router_debugfs_fini(void);
562 int lnet_rtrpools_alloc(int im_a_router);
563 void lnet_destroy_rtrbuf(struct lnet_rtrbuf *rb, int npages);
564 int lnet_rtrpools_adjust(int tiny, int small, int large);
565 int lnet_rtrpools_enable(void);
566 void lnet_rtrpools_disable(void);
567 void lnet_rtrpools_free(int keep_pools);
568 void lnet_rtr_transfer_to_peer(struct lnet_peer *src,
569 struct lnet_peer *target);
570 struct lnet_remotenet *lnet_find_rnet_locked(__u32 net);
571 int lnet_dyn_add_net(struct lnet_ioctl_config_data *conf);
572 int lnet_dyn_del_net(__u32 net);
573 int lnet_dyn_add_ni(struct lnet_ioctl_config_ni *conf);
574 int lnet_dyn_del_ni(struct lnet_ioctl_config_ni *conf);
575 int lnet_clear_lazy_portal(struct lnet_ni *ni, int portal, char *reason);
576 struct lnet_net *lnet_get_net_locked(__u32 net_id);
578 int lnet_islocalnid(lnet_nid_t nid);
579 int lnet_islocalnet(__u32 net);
580 int lnet_islocalnet_locked(__u32 net);
582 void lnet_msg_attach_md(struct lnet_msg *msg, struct lnet_libmd *md,
583 unsigned int offset, unsigned int mlen);
584 void lnet_build_unlink_event(struct lnet_libmd *md, struct lnet_event *ev);
585 void lnet_build_msg_event(struct lnet_msg *msg, enum lnet_event_kind ev_type);
586 void lnet_msg_commit(struct lnet_msg *msg, int cpt);
587 void lnet_msg_decommit(struct lnet_msg *msg, int cpt, int status);
589 void lnet_prep_send(struct lnet_msg *msg, int type,
590 struct lnet_process_id target, unsigned int offset,
592 int lnet_send(lnet_nid_t nid, struct lnet_msg *msg, lnet_nid_t rtr_nid);
593 int lnet_send_ping(lnet_nid_t dest_nid, struct lnet_handle_md *mdh, int nnis,
594 void *user_ptr, lnet_handler_t handler, bool recovery);
595 void lnet_return_tx_credits_locked(struct lnet_msg *msg);
596 void lnet_return_rx_credits_locked(struct lnet_msg *msg);
597 void lnet_schedule_blocked_locked(struct lnet_rtrbufpool *rbp);
598 void lnet_drop_routed_msgs_locked(struct list_head *list, int cpt);
600 struct list_head **lnet_create_array_of_queues(void);
602 /* portals functions */
603 /* portals attributes */
605 lnet_ptl_is_lazy(struct lnet_portal *ptl)
607 return !!(ptl->ptl_options & LNET_PTL_LAZY);
611 lnet_ptl_is_unique(struct lnet_portal *ptl)
613 return !!(ptl->ptl_options & LNET_PTL_MATCH_UNIQUE);
617 lnet_ptl_is_wildcard(struct lnet_portal *ptl)
619 return !!(ptl->ptl_options & LNET_PTL_MATCH_WILDCARD);
623 lnet_ptl_setopt(struct lnet_portal *ptl, int opt)
625 ptl->ptl_options |= opt;
629 lnet_ptl_unsetopt(struct lnet_portal *ptl, int opt)
631 ptl->ptl_options &= ~opt;
634 /* match-table functions */
635 struct list_head *lnet_mt_match_head(struct lnet_match_table *mtable,
636 struct lnet_process_id id, __u64 mbits);
637 struct lnet_match_table *lnet_mt_of_attach(unsigned int index,
638 struct lnet_process_id id,
639 __u64 mbits, __u64 ignore_bits,
640 enum lnet_ins_pos pos);
641 int lnet_mt_match_md(struct lnet_match_table *mtable,
642 struct lnet_match_info *info, struct lnet_msg *msg);
644 /* portals match/attach functions */
645 void lnet_ptl_attach_md(struct lnet_me *me, struct lnet_libmd *md,
646 struct list_head *matches, struct list_head *drops);
647 void lnet_ptl_detach_md(struct lnet_me *me, struct lnet_libmd *md);
648 int lnet_ptl_match_md(struct lnet_match_info *info, struct lnet_msg *msg);
650 /* initialized and finalize portals */
651 int lnet_portals_create(void);
652 void lnet_portals_destroy(void);
654 /* message functions */
655 int lnet_parse(struct lnet_ni *ni, struct lnet_hdr *hdr,
656 lnet_nid_t fromnid, void *private, int rdma_req);
657 int lnet_parse_local(struct lnet_ni *ni, struct lnet_msg *msg);
658 int lnet_parse_forward_locked(struct lnet_ni *ni, struct lnet_msg *msg);
660 void lnet_recv(struct lnet_ni *ni, void *private, struct lnet_msg *msg,
661 int delayed, unsigned int offset, unsigned int mlen,
663 void lnet_ni_recv(struct lnet_ni *ni, void *private, struct lnet_msg *msg,
664 int delayed, unsigned int offset,
665 unsigned int mlen, unsigned int rlen);
667 struct lnet_msg *lnet_create_reply_msg(struct lnet_ni *ni,
668 struct lnet_msg *get_msg);
669 void lnet_set_reply_msg_len(struct lnet_ni *ni, struct lnet_msg *msg,
671 void lnet_detach_rsp_tracker(struct lnet_libmd *md, int cpt);
672 void lnet_clean_zombie_rstqs(void);
674 bool lnet_md_discarded(struct lnet_libmd *md);
675 void lnet_finalize(struct lnet_msg *msg, int rc);
676 bool lnet_send_error_simulation(struct lnet_msg *msg,
677 enum lnet_msg_hstatus *hstatus);
678 void lnet_handle_remote_failure_locked(struct lnet_peer_ni *lpni);
680 void lnet_drop_message(struct lnet_ni *ni, int cpt, void *private,
681 unsigned int nob, __u32 msg_type);
682 void lnet_drop_delayed_msg_list(struct list_head *head, char *reason);
683 void lnet_recv_delayed_msg_list(struct list_head *head);
685 int lnet_msg_container_setup(struct lnet_msg_container *container, int cpt);
686 void lnet_msg_container_cleanup(struct lnet_msg_container *container);
687 void lnet_msg_containers_destroy(void);
688 int lnet_msg_containers_create(void);
690 char *lnet_health_error2str(enum lnet_msg_hstatus hstatus);
691 char *lnet_msgtyp2str(int type);
692 int lnet_fail_nid(lnet_nid_t nid, unsigned int threshold);
694 /** \addtogroup lnet_fault_simulation @{ */
696 int lnet_fault_ctl(int cmd, struct libcfs_ioctl_data *data);
697 int lnet_fault_init(void);
698 void lnet_fault_fini(void);
700 bool lnet_drop_rule_match(struct lnet_hdr *hdr, lnet_nid_t local_nid,
701 enum lnet_msg_hstatus *hstatus);
703 int lnet_delay_rule_add(struct lnet_fault_attr *attr);
704 int lnet_delay_rule_del(lnet_nid_t src, lnet_nid_t dst, bool shutdown);
705 int lnet_delay_rule_list(int pos, struct lnet_fault_attr *attr,
706 struct lnet_fault_stat *stat);
707 void lnet_delay_rule_reset(void);
708 void lnet_delay_rule_check(void);
709 bool lnet_delay_rule_match_locked(struct lnet_hdr *hdr, struct lnet_msg *msg);
711 /** @} lnet_fault_simulation */
713 void lnet_counters_get_common(struct lnet_counters_common *common);
714 int lnet_counters_get(struct lnet_counters *counters);
715 void lnet_counters_reset(void);
717 unsigned int lnet_iov_nob(unsigned int niov, struct kvec *iov);
718 unsigned int lnet_kiov_nob(unsigned int niov, struct bio_vec *iov);
719 int lnet_extract_kiov(int dst_niov, struct bio_vec *dst,
720 int src_niov, struct bio_vec *src,
721 unsigned int offset, unsigned int len);
723 void lnet_copy_iov2iov(unsigned int ndiov, struct kvec *diov,
724 unsigned int doffset,
725 unsigned int nsiov, struct kvec *siov,
726 unsigned int soffset, unsigned int nob);
727 void lnet_copy_kiov2iov(unsigned int niov, struct kvec *iov,
728 unsigned int iovoffset,
729 unsigned int nkiov, struct bio_vec *kiov,
730 unsigned int kiovoffset, unsigned int nob);
731 void lnet_copy_iov2kiov(unsigned int nkiov, struct bio_vec *kiov,
732 unsigned int kiovoffset,
733 unsigned int niov, struct kvec *iov,
734 unsigned int iovoffset, unsigned int nob);
735 void lnet_copy_kiov2kiov(unsigned int ndkiov, struct bio_vec *dkiov,
736 unsigned int doffset,
737 unsigned int nskiov, struct bio_vec *skiov,
738 unsigned int soffset, unsigned int nob);
741 lnet_copy_kiov2flat(int dlen, void *dest, unsigned int doffset,
742 unsigned int nsiov, struct bio_vec *skiov,
743 unsigned int soffset, unsigned int nob)
745 struct kvec diov = { .iov_base = dest, .iov_len = dlen };
747 lnet_copy_kiov2iov(1, &diov, doffset,
748 nsiov, skiov, soffset, nob);
752 lnet_copy_flat2kiov(unsigned int ndiov, struct bio_vec *dkiov,
753 unsigned int doffset, int slen, void *src,
754 unsigned int soffset, unsigned int nob)
756 struct kvec siov = { .iov_base = src, .iov_len = slen };
757 lnet_copy_iov2kiov(ndiov, dkiov, doffset,
758 1, &siov, soffset, nob);
761 void lnet_me_unlink(struct lnet_me *me);
763 void lnet_md_unlink(struct lnet_libmd *md);
764 void lnet_md_deconstruct(struct lnet_libmd *lmd, struct lnet_event *ev);
765 struct page *lnet_kvaddr_to_page(unsigned long vaddr);
766 int lnet_cpt_of_md(struct lnet_libmd *md, unsigned int offset);
768 unsigned int lnet_get_lnd_timeout(void);
769 void lnet_register_lnd(const struct lnet_lnd *lnd);
770 void lnet_unregister_lnd(const struct lnet_lnd *lnd);
772 struct socket *lnet_connect(lnet_nid_t peer_nid, int interface, __u32 peer_ip,
773 int peer_port, struct net *ns);
774 void lnet_connect_console_error(int rc, lnet_nid_t peer_nid,
775 __u32 peer_ip, int port);
776 int lnet_count_acceptor_nets(void);
777 int lnet_acceptor_timeout(void);
778 int lnet_acceptor_port(void);
779 int lnet_acceptor_start(void);
780 void lnet_acceptor_stop(void);
782 struct lnet_inetdev {
787 char li_name[IFNAMSIZ];
790 int lnet_inet_enumerate(struct lnet_inetdev **dev_list, struct net *ns);
791 int lnet_sock_setbuf(struct socket *socket, int txbufsize, int rxbufsize);
792 int lnet_sock_getbuf(struct socket *socket, int *txbufsize, int *rxbufsize);
793 int lnet_sock_getaddr(struct socket *socket, bool remote, __u32 *ip, int *port);
794 int lnet_sock_write(struct socket *sock, void *buffer, int nob, int timeout);
795 int lnet_sock_read(struct socket *sock, void *buffer, int nob, int timeout);
797 struct socket *lnet_sock_listen(int port, int backlog,
799 struct socket *lnet_sock_connect(int interface, int local_port,
800 struct sockaddr *peeraddr,
803 int lnet_peers_start_down(void);
804 int lnet_peer_buffer_credits(struct lnet_net *net);
805 void lnet_consolidate_routes_locked(struct lnet_peer *orig_lp,
806 struct lnet_peer *new_lp);
807 void lnet_router_discovery_complete(struct lnet_peer *lp);
808 void lnet_router_discovery_ping_reply(struct lnet_peer *lp);
810 int lnet_monitor_thr_start(void);
811 void lnet_monitor_thr_stop(void);
813 bool lnet_router_checker_active(void);
814 void lnet_check_routers(void);
815 void lnet_wait_router_start(void);
816 void lnet_swap_pinginfo(struct lnet_ping_buffer *pbuf);
818 int lnet_ping_info_validate(struct lnet_ping_info *pinfo);
819 struct lnet_ping_buffer *lnet_ping_buffer_alloc(int nnis, gfp_t gfp);
820 void lnet_ping_buffer_free(struct lnet_ping_buffer *pbuf);
822 static inline void lnet_ping_buffer_addref(struct lnet_ping_buffer *pbuf)
824 atomic_inc(&pbuf->pb_refcnt);
827 static inline void lnet_ping_buffer_decref(struct lnet_ping_buffer *pbuf)
829 if (atomic_dec_and_test(&pbuf->pb_refcnt)) {
830 wake_up_var(&pbuf->pb_refcnt);
831 lnet_ping_buffer_free(pbuf);
835 static inline int lnet_push_target_resize_needed(void)
837 return the_lnet.ln_push_target->pb_nnis < the_lnet.ln_push_target_nnis;
840 int lnet_push_target_resize(void);
841 int lnet_push_target_post(struct lnet_ping_buffer *pbuf,
842 struct lnet_handle_md *mdh);
843 void lnet_peer_push_event(struct lnet_event *ev);
845 int lnet_parse_ip2nets(const char **networksp, const char *ip2nets);
846 int lnet_parse_routes(const char *route_str, int *im_a_router);
847 int lnet_parse_networks(struct list_head *nilist, const char *networks,
848 bool use_tcp_bonding);
849 bool lnet_net_unique(__u32 net_id, struct list_head *nilist,
850 struct lnet_net **net);
851 bool lnet_ni_unique_net(struct list_head *nilist, char *iface);
852 void lnet_incr_dlc_seq(void);
853 __u32 lnet_get_dlc_seq_locked(void);
854 int lnet_get_net_count(void);
855 extern unsigned int lnet_current_net_count;
857 struct lnet_peer_net *lnet_get_next_peer_net_locked(struct lnet_peer *lp,
859 struct lnet_peer_ni *lnet_get_next_peer_ni_locked(struct lnet_peer *peer,
860 struct lnet_peer_net *peer_net,
861 struct lnet_peer_ni *prev);
862 struct lnet_peer_ni *lnet_nid2peerni_locked(lnet_nid_t nid, lnet_nid_t pref,
864 struct lnet_peer_ni *lnet_nid2peerni_ex(lnet_nid_t nid, int cpt);
865 struct lnet_peer_ni *lnet_peer_get_ni_locked(struct lnet_peer *lp,
867 struct lnet_peer_ni *lnet_find_peer_ni_locked(lnet_nid_t nid);
868 struct lnet_peer *lnet_find_peer(lnet_nid_t nid);
869 void lnet_peer_net_added(struct lnet_net *net);
870 lnet_nid_t lnet_peer_primary_nid_locked(lnet_nid_t nid);
871 int lnet_discover_peer_locked(struct lnet_peer_ni *lpni, int cpt, bool block);
872 int lnet_peer_discovery_start(void);
873 void lnet_peer_discovery_stop(void);
874 void lnet_push_update_to_peers(int force);
875 void lnet_peer_tables_cleanup(struct lnet_net *net);
876 void lnet_peer_uninit(void);
877 int lnet_peer_tables_create(void);
878 void lnet_debug_peer(lnet_nid_t nid);
879 struct lnet_peer_net *lnet_peer_get_net_locked(struct lnet_peer *peer,
881 bool lnet_peer_is_pref_nid_locked(struct lnet_peer_ni *lpni, lnet_nid_t nid);
882 int lnet_peer_add_pref_nid(struct lnet_peer_ni *lpni, lnet_nid_t nid);
883 void lnet_peer_clr_pref_nids(struct lnet_peer_ni *lpni);
884 bool lnet_peer_is_pref_rtr_locked(struct lnet_peer_ni *lpni, lnet_nid_t gw_nid);
885 void lnet_peer_clr_pref_rtrs(struct lnet_peer_ni *lpni);
886 int lnet_peer_add_pref_rtr(struct lnet_peer_ni *lpni, lnet_nid_t nid);
887 int lnet_peer_ni_set_non_mr_pref_nid(struct lnet_peer_ni *lpni, lnet_nid_t nid);
888 int lnet_add_peer_ni(lnet_nid_t key_nid, lnet_nid_t nid, bool mr);
889 int lnet_del_peer_ni(lnet_nid_t key_nid, lnet_nid_t nid);
890 int lnet_get_peer_info(struct lnet_ioctl_peer_cfg *cfg, void __user *bulk);
891 int lnet_get_peer_ni_info(__u32 peer_index, __u64 *nid,
892 char alivness[LNET_MAX_STR_LEN],
893 __u32 *cpt_iter, __u32 *refcount,
894 __u32 *ni_peer_tx_credits, __u32 *peer_tx_credits,
895 __u32 *peer_rtr_credits, __u32 *peer_min_rtr_credtis,
896 __u32 *peer_tx_qnob);
897 int lnet_get_peer_ni_hstats(struct lnet_ioctl_peer_ni_hstats *stats);
899 static inline struct lnet_peer_net *
900 lnet_find_peer_net_locked(struct lnet_peer *peer, __u32 net_id)
902 struct lnet_peer_net *peer_net;
904 list_for_each_entry(peer_net, &peer->lp_peer_nets, lpn_peer_nets) {
905 if (peer_net->lpn_net_id == net_id)
913 lnet_peer_is_multi_rail(struct lnet_peer *lp)
915 if (lp->lp_state & LNET_PEER_MULTI_RAIL)
921 lnet_peer_ni_is_configured(struct lnet_peer_ni *lpni)
923 if (lpni->lpni_peer_net->lpn_peer->lp_state & LNET_PEER_CONFIGURED)
929 lnet_peer_ni_is_primary(struct lnet_peer_ni *lpni)
931 return lpni->lpni_nid == lpni->lpni_peer_net->lpn_peer->lp_primary_nid;
934 bool lnet_peer_is_uptodate(struct lnet_peer *lp);
935 bool lnet_peer_is_uptodate_locked(struct lnet_peer *lp);
936 bool lnet_is_discovery_disabled(struct lnet_peer *lp);
937 bool lnet_is_discovery_disabled_locked(struct lnet_peer *lp);
938 bool lnet_peer_gw_discovery(struct lnet_peer *lp);
941 lnet_peer_needs_push(struct lnet_peer *lp)
943 if (!(lp->lp_state & LNET_PEER_MULTI_RAIL))
945 if (lp->lp_state & LNET_PEER_FORCE_PUSH)
947 if (lp->lp_state & LNET_PEER_NO_DISCOVERY)
949 /* if discovery is not enabled then no need to push */
950 if (lnet_peer_discovery_disabled)
952 if (lp->lp_node_seqno < atomic_read(&the_lnet.ln_ping_target_seqno))
958 * A peer NI is alive if it satisfies the following two conditions:
959 * 1. peer NI health >= LNET_MAX_HEALTH_VALUE * router_sensitivity_percentage
960 * 2. the cached NI status received when we discover the peer is UP
963 lnet_is_peer_ni_alive(struct lnet_peer_ni *lpni)
967 halive = (atomic_read(&lpni->lpni_healthv) >=
968 (LNET_MAX_HEALTH_VALUE * router_sensitivity_percentage / 100));
970 return halive && lpni->lpni_ns_status == LNET_NI_STATUS_UP;
974 lnet_update_peer_net_healthv(struct lnet_peer_ni *lpni)
976 struct lnet_peer_net *lpn;
977 int best_healthv = 0;
979 lpn = lpni->lpni_peer_net;
981 list_for_each_entry(lpni, &lpn->lpn_peer_nis, lpni_peer_nis) {
982 int lpni_healthv = atomic_read(&lpni->lpni_healthv);
983 if (best_healthv < lpni_healthv)
984 best_healthv = lpni_healthv;
987 lpn->lpn_healthv = best_healthv;
991 lnet_set_lpni_healthv_locked(struct lnet_peer_ni *lpni, int value)
993 if (atomic_read(&lpni->lpni_healthv) == value)
995 atomic_set(&lpni->lpni_healthv, value);
996 lnet_update_peer_net_healthv(lpni);
1000 lnet_atomic_add_unless_max(atomic_t *v, int a, int u)
1002 int c = atomic_read(v);
1015 old = atomic_cmpxchg(v, c, m);
1031 lnet_inc_lpni_healthv_locked(struct lnet_peer_ni *lpni, int value)
1033 /* only adjust the net health if the lpni health value changed */
1034 if (lnet_atomic_add_unless_max(&lpni->lpni_healthv, value,
1035 LNET_MAX_HEALTH_VALUE))
1036 lnet_update_peer_net_healthv(lpni);
1040 lnet_inc_healthv(atomic_t *healthv, int value)
1042 lnet_atomic_add_unless_max(healthv, value, LNET_MAX_HEALTH_VALUE);
1045 void lnet_incr_stats(struct lnet_element_stats *stats,
1046 enum lnet_msg_type msg_type,
1047 enum lnet_stats_type stats_type);
1049 __u32 lnet_sum_stats(struct lnet_element_stats *stats,
1050 enum lnet_stats_type stats_type);
1052 void lnet_usr_translate_stats(struct lnet_ioctl_element_msg_stats *msg_stats,
1053 struct lnet_element_stats *stats);