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__
40 #include <linux/netdevice.h>
42 #include <libcfs/libcfs.h>
44 #include <lnet/lib-types.h>
45 #include <uapi/linux/lnet/lnet-dlc.h>
46 #include <uapi/linux/lnet/lnet-types.h>
47 #include <uapi/linux/lnet/lnetctl.h>
48 #include <uapi/linux/lnet/nidstr.h>
50 extern struct lnet the_lnet; /* THE network */
52 #if (BITS_PER_LONG == 32)
53 /* 2 CPTs, allowing more CPTs might make us under memory pressure */
54 # define LNET_CPT_MAX_BITS 1
56 #else /* 64-bit system */
58 * 256 CPTs for thousands of CPUs, allowing more CPTs might make us
59 * under risk of consuming all lh_cookie.
61 # define LNET_CPT_MAX_BITS 8
62 #endif /* BITS_PER_LONG == 32 */
64 /* max allowed CPT number */
65 #define LNET_CPT_MAX (1 << LNET_CPT_MAX_BITS)
67 #define LNET_CPT_NUMBER (the_lnet.ln_cpt_number)
68 #define LNET_CPT_BITS (the_lnet.ln_cpt_bits)
69 #define LNET_CPT_MASK ((1ULL << LNET_CPT_BITS) - 1)
72 #define LNET_LOCK_EX CFS_PERCPT_LOCK_EX
75 #define DEFAULT_PEER_TIMEOUT 180
76 #define LNET_LND_DEFAULT_TIMEOUT 5
78 #ifdef HAVE_KERN_SOCK_GETNAME_2ARGS
79 #define lnet_kernel_getpeername(sock, addr, addrlen) \
80 kernel_getpeername(sock, addr)
81 #define lnet_kernel_getsockname(sock, addr, addrlen) \
82 kernel_getsockname(sock, addr)
84 #define lnet_kernel_getpeername(sock, addr, addrlen) \
85 kernel_getpeername(sock, addr, addrlen)
86 #define lnet_kernel_getsockname(sock, addr, addrlen) \
87 kernel_getsockname(sock, addr, addrlen)
90 static inline int lnet_is_route_alive(struct lnet_route *route)
92 if (!route->lr_gateway->lpni_alive)
93 return 0; /* gateway is down */
94 if ((route->lr_gateway->lpni_ping_feats &
95 LNET_PING_FEAT_NI_STATUS) == 0)
96 return 1; /* no NI status, assume it's alive */
97 /* has NI status, check # down NIs */
98 return route->lr_downis == 0;
101 static inline int lnet_is_wire_handle_none(struct lnet_handle_wire *wh)
103 return (wh->wh_interface_cookie == LNET_WIRE_HANDLE_COOKIE_NONE &&
104 wh->wh_object_cookie == LNET_WIRE_HANDLE_COOKIE_NONE);
107 static inline int lnet_md_exhausted(struct lnet_libmd *md)
109 return (md->md_threshold == 0 ||
110 ((md->md_options & LNET_MD_MAX_SIZE) != 0 &&
111 md->md_offset + md->md_max_size > md->md_length));
114 static inline int lnet_md_unlinkable(struct lnet_libmd *md)
116 /* Should unlink md when its refcount is 0 and either:
117 * - md has been flagged for deletion (by auto unlink or LNetM[DE]Unlink,
118 * in the latter case md may not be exhausted).
119 * - auto unlink is on and md is exhausted.
121 if (md->md_refcount != 0)
124 if ((md->md_flags & LNET_MD_FLAG_ZOMBIE) != 0)
127 return ((md->md_flags & LNET_MD_FLAG_AUTO_UNLINK) != 0 &&
128 lnet_md_exhausted(md));
131 #define lnet_cpt_table() (the_lnet.ln_cpt_table)
132 #define lnet_cpt_current() cfs_cpt_current(the_lnet.ln_cpt_table, 1)
135 lnet_cpt_of_cookie(__u64 cookie)
137 unsigned int cpt = (cookie >> LNET_COOKIE_TYPE_BITS) & LNET_CPT_MASK;
139 /* LNET_CPT_NUMBER doesn't have to be power2, which means we can
140 * get illegal cpt from it's invalid cookie */
141 return cpt < LNET_CPT_NUMBER ? cpt : cpt % LNET_CPT_NUMBER;
145 lnet_res_lock(int cpt)
147 cfs_percpt_lock(the_lnet.ln_res_lock, cpt);
151 lnet_res_unlock(int cpt)
153 cfs_percpt_unlock(the_lnet.ln_res_lock, cpt);
157 lnet_res_lock_current(void)
159 int cpt = lnet_cpt_current();
166 lnet_net_lock(int cpt)
168 cfs_percpt_lock(the_lnet.ln_net_lock, cpt);
172 lnet_net_unlock(int cpt)
174 cfs_percpt_unlock(the_lnet.ln_net_lock, cpt);
178 lnet_net_lock_current(void)
180 int cpt = lnet_cpt_current();
186 #define LNET_LOCK() lnet_net_lock(LNET_LOCK_EX)
187 #define LNET_UNLOCK() lnet_net_unlock(LNET_LOCK_EX)
189 #define lnet_ptl_lock(ptl) spin_lock(&(ptl)->ptl_lock)
190 #define lnet_ptl_unlock(ptl) spin_unlock(&(ptl)->ptl_lock)
191 #define lnet_eq_wait_lock() spin_lock(&the_lnet.ln_eq_wait_lock)
192 #define lnet_eq_wait_unlock() spin_unlock(&the_lnet.ln_eq_wait_lock)
193 #define lnet_ni_lock(ni) spin_lock(&(ni)->ni_lock)
194 #define lnet_ni_unlock(ni) spin_unlock(&(ni)->ni_lock)
196 #define MAX_PORTALS 64
198 #define LNET_SMALL_MD_SIZE offsetof(struct lnet_libmd, md_iov.iov[1])
199 extern struct kmem_cache *lnet_mes_cachep; /* MEs kmem_cache */
200 extern struct kmem_cache *lnet_small_mds_cachep; /* <= LNET_SMALL_MD_SIZE bytes
203 static inline struct lnet_eq *
208 LIBCFS_ALLOC(eq, sizeof(*eq));
213 lnet_eq_free(struct lnet_eq *eq)
215 LIBCFS_FREE(eq, sizeof(*eq));
218 static inline struct lnet_libmd *
219 lnet_md_alloc(struct lnet_md *umd)
221 struct lnet_libmd *md;
225 if ((umd->options & LNET_MD_KIOV) != 0) {
227 size = offsetof(struct lnet_libmd, md_iov.kiov[niov]);
229 niov = ((umd->options & LNET_MD_IOVEC) != 0) ?
231 size = offsetof(struct lnet_libmd, md_iov.iov[niov]);
234 if (size <= LNET_SMALL_MD_SIZE) {
235 md = kmem_cache_alloc(lnet_small_mds_cachep,
236 GFP_NOFS | __GFP_ZERO);
238 CDEBUG(D_MALLOC, "slab-alloced 'md' of size %u at "
241 CDEBUG(D_MALLOC, "failed to allocate 'md' of size %u\n",
246 LIBCFS_ALLOC(md, size);
250 /* Set here in case of early free */
251 md->md_options = umd->options;
253 INIT_LIST_HEAD(&md->md_list);
260 lnet_md_free(struct lnet_libmd *md)
264 if ((md->md_options & LNET_MD_KIOV) != 0)
265 size = offsetof(struct lnet_libmd, md_iov.kiov[md->md_niov]);
267 size = offsetof(struct lnet_libmd, md_iov.iov[md->md_niov]);
269 if (size <= LNET_SMALL_MD_SIZE) {
270 CDEBUG(D_MALLOC, "slab-freed 'md' at %p.\n", md);
271 kmem_cache_free(lnet_small_mds_cachep, md);
273 LIBCFS_FREE(md, size);
277 static inline struct lnet_me *
282 me = kmem_cache_alloc(lnet_mes_cachep, GFP_NOFS | __GFP_ZERO);
285 CDEBUG(D_MALLOC, "slab-alloced 'me' at %p.\n", me);
287 CDEBUG(D_MALLOC, "failed to allocate 'me'\n");
293 lnet_me_free(struct lnet_me *me)
295 CDEBUG(D_MALLOC, "slab-freed 'me' at %p.\n", me);
296 kmem_cache_free(lnet_mes_cachep, me);
299 struct lnet_libhandle *lnet_res_lh_lookup(struct lnet_res_container *rec,
301 void lnet_res_lh_initialize(struct lnet_res_container *rec,
302 struct lnet_libhandle *lh);
304 lnet_res_lh_invalidate(struct lnet_libhandle *lh)
306 /* ALWAYS called with resource lock held */
307 /* NB: cookie is still useful, don't reset it */
308 list_del(&lh->lh_hash_chain);
312 lnet_eq2handle(struct lnet_handle_eq *handle, struct lnet_eq *eq)
315 LNetInvalidateEQHandle(handle);
319 handle->cookie = eq->eq_lh.lh_cookie;
322 static inline struct lnet_eq *
323 lnet_handle2eq(struct lnet_handle_eq *handle)
325 /* ALWAYS called with resource lock held */
326 struct lnet_libhandle *lh;
328 lh = lnet_res_lh_lookup(&the_lnet.ln_eq_container, handle->cookie);
332 return lh_entry(lh, struct lnet_eq, eq_lh);
336 lnet_md2handle(struct lnet_handle_md *handle, struct lnet_libmd *md)
338 handle->cookie = md->md_lh.lh_cookie;
341 static inline struct lnet_libmd *
342 lnet_handle2md(struct lnet_handle_md *handle)
344 /* ALWAYS called with resource lock held */
345 struct lnet_libhandle *lh;
348 cpt = lnet_cpt_of_cookie(handle->cookie);
349 lh = lnet_res_lh_lookup(the_lnet.ln_md_containers[cpt],
354 return lh_entry(lh, struct lnet_libmd, md_lh);
357 static inline struct lnet_libmd *
358 lnet_wire_handle2md(struct lnet_handle_wire *wh)
360 /* ALWAYS called with resource lock held */
361 struct lnet_libhandle *lh;
364 if (wh->wh_interface_cookie != the_lnet.ln_interface_cookie)
367 cpt = lnet_cpt_of_cookie(wh->wh_object_cookie);
368 lh = lnet_res_lh_lookup(the_lnet.ln_md_containers[cpt],
369 wh->wh_object_cookie);
373 return lh_entry(lh, struct lnet_libmd, md_lh);
377 lnet_me2handle(struct lnet_handle_me *handle, struct lnet_me *me)
379 handle->cookie = me->me_lh.lh_cookie;
382 static inline struct lnet_me *
383 lnet_handle2me(struct lnet_handle_me *handle)
385 /* ALWAYS called with resource lock held */
386 struct lnet_libhandle *lh;
389 cpt = lnet_cpt_of_cookie(handle->cookie);
390 lh = lnet_res_lh_lookup(the_lnet.ln_me_containers[cpt],
395 return lh_entry(lh, struct lnet_me, me_lh);
399 lnet_peer_net_addref_locked(struct lnet_peer_net *lpn)
401 atomic_inc(&lpn->lpn_refcount);
404 extern void lnet_destroy_peer_net_locked(struct lnet_peer_net *lpn);
407 lnet_peer_net_decref_locked(struct lnet_peer_net *lpn)
409 if (atomic_dec_and_test(&lpn->lpn_refcount))
410 lnet_destroy_peer_net_locked(lpn);
414 lnet_peer_addref_locked(struct lnet_peer *lp)
416 atomic_inc(&lp->lp_refcount);
419 extern void lnet_destroy_peer_locked(struct lnet_peer *lp);
422 lnet_peer_decref_locked(struct lnet_peer *lp)
424 if (atomic_dec_and_test(&lp->lp_refcount))
425 lnet_destroy_peer_locked(lp);
429 lnet_peer_ni_addref_locked(struct lnet_peer_ni *lp)
431 LASSERT(atomic_read(&lp->lpni_refcount) > 0);
432 atomic_inc(&lp->lpni_refcount);
435 extern void lnet_destroy_peer_ni_locked(struct lnet_peer_ni *lp);
438 lnet_peer_ni_decref_locked(struct lnet_peer_ni *lp)
440 LASSERT(atomic_read(&lp->lpni_refcount) > 0);
441 if (atomic_dec_and_test(&lp->lpni_refcount))
442 lnet_destroy_peer_ni_locked(lp);
446 lnet_isrouter(struct lnet_peer_ni *lp)
448 return lp->lpni_rtr_refcount != 0;
452 lnet_ni_addref_locked(struct lnet_ni *ni, int cpt)
454 LASSERT(cpt >= 0 && cpt < LNET_CPT_NUMBER);
455 LASSERT(*ni->ni_refs[cpt] >= 0);
457 (*ni->ni_refs[cpt])++;
461 lnet_ni_addref(struct lnet_ni *ni)
464 lnet_ni_addref_locked(ni, 0);
469 lnet_ni_decref_locked(struct lnet_ni *ni, int cpt)
471 LASSERT(cpt >= 0 && cpt < LNET_CPT_NUMBER);
472 LASSERT(*ni->ni_refs[cpt] > 0);
474 (*ni->ni_refs[cpt])--;
478 lnet_ni_decref(struct lnet_ni *ni)
481 lnet_ni_decref_locked(ni, 0);
485 static inline struct lnet_msg *
488 struct lnet_msg *msg;
490 LIBCFS_ALLOC(msg, sizeof(*msg));
492 /* no need to zero, LIBCFS_ALLOC does for us */
497 lnet_msg_free(struct lnet_msg *msg)
499 LASSERT(!msg->msg_onactivelist);
500 LIBCFS_FREE(msg, sizeof(*msg));
503 static inline struct lnet_rsp_tracker *
504 lnet_rspt_alloc(int cpt)
506 struct lnet_rsp_tracker *rspt;
507 LIBCFS_ALLOC(rspt, sizeof(*rspt));
509 the_lnet.ln_counters[cpt]->lct_health.lch_rst_alloc++;
510 lnet_net_unlock(cpt);
515 lnet_rspt_free(struct lnet_rsp_tracker *rspt, int cpt)
517 LIBCFS_FREE(rspt, sizeof(*rspt));
519 the_lnet.ln_counters[cpt]->lct_health.lch_rst_alloc--;
520 lnet_net_unlock(cpt);
523 void lnet_ni_free(struct lnet_ni *ni);
524 void lnet_net_free(struct lnet_net *net);
527 lnet_net_alloc(__u32 net_type, struct list_head *netlist);
530 lnet_ni_alloc(struct lnet_net *net, struct cfs_expr_list *el,
533 lnet_ni_alloc_w_cpt_array(struct lnet_net *net, __u32 *cpts, __u32 ncpts,
537 lnet_nid2peerhash(lnet_nid_t nid)
539 return hash_long(nid, LNET_PEER_HASH_BITS);
542 static inline struct list_head *
543 lnet_net2rnethash(__u32 net)
545 return &the_lnet.ln_remote_nets_hash[(LNET_NETNUM(net) +
547 ((1U << the_lnet.ln_remote_nets_hbits) - 1)];
550 extern struct lnet_lnd the_lolnd;
551 extern int avoid_asym_router_failure;
553 extern unsigned int lnet_nid_cpt_hash(lnet_nid_t nid, unsigned int number);
554 extern int lnet_cpt_of_nid_locked(lnet_nid_t nid, struct lnet_ni *ni);
555 extern int lnet_cpt_of_nid(lnet_nid_t nid, struct lnet_ni *ni);
556 extern struct lnet_ni *lnet_nid2ni_locked(lnet_nid_t nid, int cpt);
557 extern struct lnet_ni *lnet_nid2ni_addref(lnet_nid_t nid);
558 extern struct lnet_ni *lnet_net2ni_locked(__u32 net, int cpt);
559 extern struct lnet_ni *lnet_net2ni_addref(__u32 net);
560 struct lnet_net *lnet_get_net_locked(__u32 net_id);
562 int lnet_lib_init(void);
563 void lnet_lib_exit(void);
565 extern unsigned lnet_transaction_timeout;
566 extern unsigned lnet_retry_count;
567 extern unsigned int lnet_numa_range;
568 extern unsigned int lnet_health_sensitivity;
569 extern unsigned int lnet_recovery_interval;
570 extern unsigned int lnet_peer_discovery_disabled;
571 extern unsigned int lnet_drop_asym_route;
572 extern int portal_rotor;
574 void lnet_mt_event_handler(struct lnet_event *event);
576 int lnet_notify(struct lnet_ni *ni, lnet_nid_t peer, int alive,
578 void lnet_notify_locked(struct lnet_peer_ni *lp, int notifylnd, int alive,
580 int lnet_add_route(__u32 net, __u32 hops, lnet_nid_t gateway_nid,
581 unsigned int priority);
582 int lnet_check_routes(void);
583 int lnet_del_route(__u32 net, lnet_nid_t gw_nid);
584 void lnet_destroy_routes(void);
585 int lnet_get_route(int idx, __u32 *net, __u32 *hops,
586 lnet_nid_t *gateway, __u32 *alive, __u32 *priority);
587 int lnet_get_rtr_pool_cfg(int idx, struct lnet_ioctl_pool_cfg *pool_cfg);
588 struct lnet_ni *lnet_get_next_ni_locked(struct lnet_net *mynet,
589 struct lnet_ni *prev);
590 struct lnet_ni *lnet_get_ni_idx_locked(int idx);
592 extern int libcfs_ioctl_getdata(struct libcfs_ioctl_hdr **hdr_pp,
593 struct libcfs_ioctl_hdr __user *uparam);
594 extern int lnet_get_peer_list(__u32 *countp, __u32 *sizep,
595 struct lnet_process_id __user *ids);
596 extern void lnet_peer_ni_set_healthv(lnet_nid_t nid, int value, bool all);
597 extern void lnet_peer_ni_add_to_recoveryq_locked(struct lnet_peer_ni *lpni);
599 void lnet_router_debugfs_init(void);
600 void lnet_router_debugfs_fini(void);
601 int lnet_rtrpools_alloc(int im_a_router);
602 void lnet_destroy_rtrbuf(struct lnet_rtrbuf *rb, int npages);
603 int lnet_rtrpools_adjust(int tiny, int small, int large);
604 int lnet_rtrpools_enable(void);
605 void lnet_rtrpools_disable(void);
606 void lnet_rtrpools_free(int keep_pools);
607 struct lnet_remotenet *lnet_find_rnet_locked(__u32 net);
608 int lnet_dyn_add_net(struct lnet_ioctl_config_data *conf);
609 int lnet_dyn_del_net(__u32 net);
610 int lnet_dyn_add_ni(struct lnet_ioctl_config_ni *conf);
611 int lnet_dyn_del_ni(struct lnet_ioctl_config_ni *conf);
612 int lnet_clear_lazy_portal(struct lnet_ni *ni, int portal, char *reason);
613 struct lnet_net *lnet_get_net_locked(__u32 net_id);
615 int lnet_islocalnid(lnet_nid_t nid);
616 int lnet_islocalnet(__u32 net);
618 void lnet_msg_attach_md(struct lnet_msg *msg, struct lnet_libmd *md,
619 unsigned int offset, unsigned int mlen);
620 void lnet_build_unlink_event(struct lnet_libmd *md, struct lnet_event *ev);
621 void lnet_build_msg_event(struct lnet_msg *msg, enum lnet_event_kind ev_type);
622 void lnet_msg_commit(struct lnet_msg *msg, int cpt);
623 void lnet_msg_decommit(struct lnet_msg *msg, int cpt, int status);
625 void lnet_eq_enqueue_event(struct lnet_eq *eq, struct lnet_event *ev);
626 void lnet_prep_send(struct lnet_msg *msg, int type,
627 struct lnet_process_id target, unsigned int offset,
629 int lnet_send(lnet_nid_t nid, struct lnet_msg *msg, lnet_nid_t rtr_nid);
630 int lnet_send_ping(lnet_nid_t dest_nid, struct lnet_handle_md *mdh, int nnis,
631 void *user_ptr, struct lnet_handle_eq eqh, bool recovery);
632 void lnet_return_tx_credits_locked(struct lnet_msg *msg);
633 void lnet_return_rx_credits_locked(struct lnet_msg *msg);
634 void lnet_schedule_blocked_locked(struct lnet_rtrbufpool *rbp);
635 void lnet_drop_routed_msgs_locked(struct list_head *list, int cpt);
637 struct list_head **lnet_create_array_of_queues(void);
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);
703 void lnet_ni_send(struct lnet_ni *ni, struct lnet_msg *msg);
705 struct lnet_msg *lnet_create_reply_msg(struct lnet_ni *ni,
706 struct lnet_msg *get_msg);
707 void lnet_set_reply_msg_len(struct lnet_ni *ni, struct lnet_msg *msg,
709 void lnet_detach_rsp_tracker(struct lnet_libmd *md, int cpt);
710 void lnet_clean_zombie_rstqs(void);
712 void lnet_finalize(struct lnet_msg *msg, int rc);
713 bool lnet_send_error_simulation(struct lnet_msg *msg,
714 enum lnet_msg_hstatus *hstatus);
715 void lnet_handle_remote_failure_locked(struct lnet_peer_ni *lpni);
717 void lnet_drop_message(struct lnet_ni *ni, int cpt, void *private,
718 unsigned int nob, __u32 msg_type);
719 void lnet_drop_delayed_msg_list(struct list_head *head, char *reason);
720 void lnet_recv_delayed_msg_list(struct list_head *head);
722 int lnet_msg_container_setup(struct lnet_msg_container *container, int cpt);
723 void lnet_msg_container_cleanup(struct lnet_msg_container *container);
724 void lnet_msg_containers_destroy(void);
725 int lnet_msg_containers_create(void);
727 char *lnet_health_error2str(enum lnet_msg_hstatus hstatus);
728 char *lnet_msgtyp2str(int type);
729 void lnet_print_hdr(struct lnet_hdr *hdr);
730 int lnet_fail_nid(lnet_nid_t nid, unsigned int threshold);
732 /** \addtogroup lnet_fault_simulation @{ */
734 int lnet_fault_ctl(int cmd, struct libcfs_ioctl_data *data);
735 int lnet_fault_init(void);
736 void lnet_fault_fini(void);
738 bool lnet_drop_rule_match(struct lnet_hdr *hdr, enum lnet_msg_hstatus *hstatus);
740 int lnet_delay_rule_add(struct lnet_fault_attr *attr);
741 int lnet_delay_rule_del(lnet_nid_t src, lnet_nid_t dst, bool shutdown);
742 int lnet_delay_rule_list(int pos, struct lnet_fault_attr *attr,
743 struct lnet_fault_stat *stat);
744 void lnet_delay_rule_reset(void);
745 void lnet_delay_rule_check(void);
746 bool lnet_delay_rule_match_locked(struct lnet_hdr *hdr, struct lnet_msg *msg);
748 /** @} lnet_fault_simulation */
750 void lnet_counters_get_common(struct lnet_counters_common *common);
751 void lnet_counters_get(struct lnet_counters *counters);
752 void lnet_counters_reset(void);
754 unsigned int lnet_iov_nob(unsigned int niov, struct kvec *iov);
755 int lnet_extract_iov(int dst_niov, struct kvec *dst,
756 int src_niov, struct kvec *src,
757 unsigned int offset, unsigned int len);
759 unsigned int lnet_kiov_nob (unsigned int niov, lnet_kiov_t *iov);
760 int lnet_extract_kiov(int dst_niov, lnet_kiov_t *dst,
761 int src_niov, lnet_kiov_t *src,
762 unsigned int offset, unsigned int len);
764 void lnet_copy_iov2iov(unsigned int ndiov, struct kvec *diov,
765 unsigned int doffset,
766 unsigned int nsiov, struct kvec *siov,
767 unsigned int soffset, unsigned int nob);
768 void lnet_copy_kiov2iov(unsigned int niov, struct kvec *iov,
769 unsigned int iovoffset,
770 unsigned int nkiov, lnet_kiov_t *kiov,
771 unsigned int kiovoffset, unsigned int nob);
772 void lnet_copy_iov2kiov(unsigned int nkiov, lnet_kiov_t *kiov,
773 unsigned int kiovoffset,
774 unsigned int niov, struct kvec *iov,
775 unsigned int iovoffset, unsigned int nob);
776 void lnet_copy_kiov2kiov(unsigned int ndkiov, lnet_kiov_t *dkiov,
777 unsigned int doffset,
778 unsigned int nskiov, lnet_kiov_t *skiov,
779 unsigned int soffset, unsigned int nob);
782 lnet_copy_iov2flat(int dlen, void *dest, unsigned int doffset,
783 unsigned int nsiov, struct kvec *siov, unsigned int soffset,
786 struct kvec diov = { .iov_base = dest, .iov_len = dlen };
788 lnet_copy_iov2iov(1, &diov, doffset,
789 nsiov, siov, soffset, nob);
793 lnet_copy_kiov2flat(int dlen, void *dest, unsigned int doffset,
794 unsigned int nsiov, lnet_kiov_t *skiov,
795 unsigned int soffset, unsigned int nob)
797 struct kvec diov = { .iov_base = dest, .iov_len = dlen };
799 lnet_copy_kiov2iov(1, &diov, doffset,
800 nsiov, skiov, soffset, nob);
804 lnet_copy_flat2iov(unsigned int ndiov, struct kvec *diov, unsigned int doffset,
805 int slen, void *src, unsigned int soffset,
808 struct kvec siov = { .iov_base = src, .iov_len = slen };
809 lnet_copy_iov2iov(ndiov, diov, doffset,
810 1, &siov, soffset, nob);
814 lnet_copy_flat2kiov(unsigned int ndiov, lnet_kiov_t *dkiov,
815 unsigned int doffset, int slen, void *src,
816 unsigned int soffset, unsigned int nob)
818 struct kvec siov = { .iov_base = src, .iov_len = slen };
819 lnet_copy_iov2kiov(ndiov, dkiov, doffset,
820 1, &siov, soffset, nob);
823 void lnet_me_unlink(struct lnet_me *me);
825 void lnet_md_unlink(struct lnet_libmd *md);
826 void lnet_md_deconstruct(struct lnet_libmd *lmd, struct lnet_md *umd);
827 struct page *lnet_kvaddr_to_page(unsigned long vaddr);
828 int lnet_cpt_of_md(struct lnet_libmd *md, unsigned int offset);
830 unsigned int lnet_get_lnd_timeout(void);
831 void lnet_register_lnd(struct lnet_lnd *lnd);
832 void lnet_unregister_lnd(struct lnet_lnd *lnd);
834 int lnet_connect(struct socket **sockp, lnet_nid_t peer_nid,
835 __u32 local_ip, __u32 peer_ip, int peer_port, struct net *ns);
836 void lnet_connect_console_error(int rc, lnet_nid_t peer_nid,
837 __u32 peer_ip, int port);
838 int lnet_count_acceptor_nets(void);
839 int lnet_acceptor_timeout(void);
840 int lnet_acceptor_port(void);
841 int lnet_acceptor_start(void);
842 void lnet_acceptor_stop(void);
844 struct lnet_inetdev {
849 char li_name[IFNAMSIZ];
852 int lnet_inet_enumerate(struct lnet_inetdev **dev_list, struct net *ns);
853 int lnet_sock_setbuf(struct socket *socket, int txbufsize, int rxbufsize);
854 int lnet_sock_getbuf(struct socket *socket, int *txbufsize, int *rxbufsize);
855 int lnet_sock_getaddr(struct socket *socket, bool remote, __u32 *ip, int *port);
856 int lnet_sock_write(struct socket *sock, void *buffer, int nob, int timeout);
857 int lnet_sock_read(struct socket *sock, void *buffer, int nob, int timeout);
859 int lnet_sock_listen(struct socket **sockp, __u32 ip, int port, int backlog,
861 int lnet_sock_accept(struct socket **newsockp, struct socket *sock);
862 int lnet_sock_connect(struct socket **sockp, int *fatal,
863 __u32 local_ip, int local_port,
864 __u32 peer_ip, int peer_port, struct net *ns);
866 int lnet_peers_start_down(void);
867 int lnet_peer_buffer_credits(struct lnet_net *net);
869 int lnet_monitor_thr_start(void);
870 void lnet_monitor_thr_stop(void);
872 bool lnet_router_checker_active(void);
873 void lnet_check_routers(void);
874 int lnet_router_pre_mt_start(void);
875 void lnet_router_post_mt_start(void);
876 void lnet_prune_rc_data(int wait_unlink);
877 void lnet_router_cleanup(void);
878 void lnet_router_ni_update_locked(struct lnet_peer_ni *gw, __u32 net);
879 void lnet_swap_pinginfo(struct lnet_ping_buffer *pbuf);
881 int lnet_ping_info_validate(struct lnet_ping_info *pinfo);
882 struct lnet_ping_buffer *lnet_ping_buffer_alloc(int nnis, gfp_t gfp);
883 void lnet_ping_buffer_free(struct lnet_ping_buffer *pbuf);
885 static inline void lnet_ping_buffer_addref(struct lnet_ping_buffer *pbuf)
887 atomic_inc(&pbuf->pb_refcnt);
890 static inline void lnet_ping_buffer_decref(struct lnet_ping_buffer *pbuf)
892 if (atomic_dec_and_test(&pbuf->pb_refcnt))
893 lnet_ping_buffer_free(pbuf);
896 static inline int lnet_ping_buffer_numref(struct lnet_ping_buffer *pbuf)
898 return atomic_read(&pbuf->pb_refcnt);
901 static inline int lnet_push_target_resize_needed(void)
903 return the_lnet.ln_push_target->pb_nnis < the_lnet.ln_push_target_nnis;
906 int lnet_push_target_resize(void);
907 void lnet_peer_push_event(struct lnet_event *ev);
909 int lnet_parse_ip2nets(char **networksp, char *ip2nets);
910 int lnet_parse_routes(char *route_str, int *im_a_router);
911 int lnet_parse_networks(struct list_head *nilist, char *networks,
912 bool use_tcp_bonding);
913 bool lnet_net_unique(__u32 net_id, struct list_head *nilist,
914 struct lnet_net **net);
915 bool lnet_ni_unique_net(struct list_head *nilist, char *iface);
916 void lnet_incr_dlc_seq(void);
917 __u32 lnet_get_dlc_seq_locked(void);
919 struct lnet_peer_ni *lnet_get_next_peer_ni_locked(struct lnet_peer *peer,
920 struct lnet_peer_net *peer_net,
921 struct lnet_peer_ni *prev);
922 struct lnet_peer_ni *lnet_nid2peerni_locked(lnet_nid_t nid, lnet_nid_t pref,
924 struct lnet_peer_ni *lnet_nid2peerni_ex(lnet_nid_t nid, int cpt);
925 struct lnet_peer_ni *lnet_find_peer_ni_locked(lnet_nid_t nid);
926 struct lnet_peer *lnet_find_peer(lnet_nid_t nid);
927 void lnet_peer_net_added(struct lnet_net *net);
928 lnet_nid_t lnet_peer_primary_nid_locked(lnet_nid_t nid);
929 int lnet_discover_peer_locked(struct lnet_peer_ni *lpni, int cpt, bool block);
930 int lnet_peer_discovery_start(void);
931 void lnet_peer_discovery_stop(void);
932 void lnet_push_update_to_peers(int force);
933 void lnet_peer_tables_cleanup(struct lnet_net *net);
934 void lnet_peer_uninit(void);
935 int lnet_peer_tables_create(void);
936 void lnet_debug_peer(lnet_nid_t nid);
937 struct lnet_peer_net *lnet_peer_get_net_locked(struct lnet_peer *peer,
939 bool lnet_peer_is_pref_nid_locked(struct lnet_peer_ni *lpni, lnet_nid_t nid);
940 int lnet_peer_ni_set_non_mr_pref_nid(struct lnet_peer_ni *lpni, lnet_nid_t nid);
941 int lnet_add_peer_ni(lnet_nid_t key_nid, lnet_nid_t nid, bool mr);
942 int lnet_del_peer_ni(lnet_nid_t key_nid, lnet_nid_t nid);
943 int lnet_get_peer_info(struct lnet_ioctl_peer_cfg *cfg, void __user *bulk);
944 int lnet_get_peer_ni_info(__u32 peer_index, __u64 *nid,
945 char alivness[LNET_MAX_STR_LEN],
946 __u32 *cpt_iter, __u32 *refcount,
947 __u32 *ni_peer_tx_credits, __u32 *peer_tx_credits,
948 __u32 *peer_rtr_credits, __u32 *peer_min_rtr_credtis,
949 __u32 *peer_tx_qnob);
950 int lnet_get_peer_ni_hstats(struct lnet_ioctl_peer_ni_hstats *stats);
952 static inline struct lnet_peer_net *
953 lnet_find_peer_net_locked(struct lnet_peer *peer, __u32 net_id)
955 struct lnet_peer_net *peer_net;
957 list_for_each_entry(peer_net, &peer->lp_peer_nets, lpn_peer_nets) {
958 if (peer_net->lpn_net_id == net_id)
966 lnet_peer_set_alive(struct lnet_peer_ni *lp)
968 lp->lpni_last_alive = ktime_get_seconds();
969 lp->lpni_last_query = lp->lpni_last_alive;
971 lnet_notify_locked(lp, 0, 1, lp->lpni_last_alive);
975 lnet_peer_is_multi_rail(struct lnet_peer *lp)
977 if (lp->lp_state & LNET_PEER_MULTI_RAIL)
983 lnet_peer_ni_is_configured(struct lnet_peer_ni *lpni)
985 if (lpni->lpni_peer_net->lpn_peer->lp_state & LNET_PEER_CONFIGURED)
991 lnet_peer_ni_is_primary(struct lnet_peer_ni *lpni)
993 return lpni->lpni_nid == lpni->lpni_peer_net->lpn_peer->lp_primary_nid;
996 bool lnet_peer_is_uptodate(struct lnet_peer *lp);
999 lnet_peer_needs_push(struct lnet_peer *lp)
1001 if (!(lp->lp_state & LNET_PEER_MULTI_RAIL))
1003 if (lp->lp_state & LNET_PEER_FORCE_PUSH)
1005 if (lp->lp_state & LNET_PEER_NO_DISCOVERY)
1007 if (lp->lp_node_seqno < atomic_read(&the_lnet.ln_ping_target_seqno))
1013 lnet_inc_healthv(atomic_t *healthv)
1015 atomic_add_unless(healthv, 1, LNET_MAX_HEALTH_VALUE);
1018 void lnet_incr_stats(struct lnet_element_stats *stats,
1019 enum lnet_msg_type msg_type,
1020 enum lnet_stats_type stats_type);
1022 __u32 lnet_sum_stats(struct lnet_element_stats *stats,
1023 enum lnet_stats_type stats_type);
1025 void lnet_usr_translate_stats(struct lnet_ioctl_element_msg_stats *msg_stats,
1026 struct lnet_element_stats *stats);