1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lnet/lnet/lib-move.c
38 * Data movement routines
41 #define DEBUG_SUBSYSTEM S_LNET
43 #include <lnet/lib-lnet.h>
45 static int local_nid_dist_zero = 1;
46 CFS_MODULE_PARM(local_nid_dist_zero, "i", int, 0444,
50 static void lnet_commit_md (lnet_libmd_t *md, lnet_msg_t *msg);
52 #define LNET_MATCHMD_NONE 0 /* Didn't match */
53 #define LNET_MATCHMD_OK 1 /* Matched OK */
54 #define LNET_MATCHMD_DROP 2 /* Must be discarded */
57 lnet_try_match_md (int index, int op_mask, lnet_process_id_t src,
58 unsigned int rlength, unsigned int roffset,
59 __u64 match_bits, lnet_libmd_t *md, lnet_msg_t *msg,
60 unsigned int *mlength_out, unsigned int *offset_out)
62 /* ALWAYS called holding the LNET_LOCK, and can't LNET_UNLOCK;
63 * lnet_match_blocked_msg() relies on this to avoid races */
66 lnet_me_t *me = md->md_me;
68 /* mismatched MD op */
69 if ((md->md_options & op_mask) == 0)
70 return LNET_MATCHMD_NONE;
73 if (lnet_md_exhausted(md))
74 return LNET_MATCHMD_NONE;
76 /* mismatched ME nid/pid? */
77 if (me->me_match_id.nid != LNET_NID_ANY &&
78 me->me_match_id.nid != src.nid)
79 return LNET_MATCHMD_NONE;
81 if (me->me_match_id.pid != LNET_PID_ANY &&
82 me->me_match_id.pid != src.pid)
83 return LNET_MATCHMD_NONE;
85 /* mismatched ME matchbits? */
86 if (((me->me_match_bits ^ match_bits) & ~me->me_ignore_bits) != 0)
87 return LNET_MATCHMD_NONE;
89 /* Hurrah! This _is_ a match; check it out... */
91 if ((md->md_options & LNET_MD_MANAGE_REMOTE) == 0)
92 offset = md->md_offset;
96 if ((md->md_options & LNET_MD_MAX_SIZE) != 0) {
97 mlength = md->md_max_size;
98 LASSERT (md->md_offset + mlength <= md->md_length);
100 mlength = md->md_length - offset;
103 if (rlength <= mlength) { /* fits in allowed space */
105 } else if ((md->md_options & LNET_MD_TRUNCATE) == 0) {
106 /* this packet _really_ is too big */
107 CERROR("Matching packet from %s, match "LPU64
108 " length %d too big: %d left, %d allowed\n",
109 libcfs_id2str(src), match_bits, rlength,
110 md->md_length - offset, mlength);
112 return LNET_MATCHMD_DROP;
115 /* Commit to this ME/MD */
116 CDEBUG(D_NET, "Incoming %s index %x from %s of "
117 "length %d/%d into md "LPX64" [%d] + %d\n",
118 (op_mask == LNET_MD_OP_PUT) ? "put" : "get",
119 index, libcfs_id2str(src), mlength, rlength,
120 md->md_lh.lh_cookie, md->md_niov, offset);
122 lnet_commit_md(md, msg);
123 md->md_offset = offset + mlength;
125 /* NB Caller will set ev.type and ev.hdr_data */
126 msg->msg_ev.initiator = src;
127 msg->msg_ev.pt_index = index;
128 msg->msg_ev.match_bits = match_bits;
129 msg->msg_ev.rlength = rlength;
130 msg->msg_ev.mlength = mlength;
131 msg->msg_ev.offset = offset;
133 lnet_md_deconstruct(md, &msg->msg_ev.md);
134 lnet_md2handle(&msg->msg_ev.md_handle, md);
136 *offset_out = offset;
137 *mlength_out = mlength;
139 /* Auto-unlink NOW, so the ME gets unlinked if required.
140 * We bumped md->md_refcount above so the MD just gets flagged
141 * for unlink when it is finalized. */
142 if ((md->md_flags & LNET_MD_FLAG_AUTO_UNLINK) != 0 &&
143 lnet_md_exhausted(md)) {
147 return LNET_MATCHMD_OK;
151 lnet_match_md(int index, int op_mask, lnet_process_id_t src,
152 unsigned int rlength, unsigned int roffset,
153 __u64 match_bits, lnet_msg_t *msg,
154 unsigned int *mlength_out, unsigned int *offset_out,
155 lnet_libmd_t **md_out)
157 lnet_portal_t *ptl = &the_lnet.ln_portals[index];
163 CDEBUG (D_NET, "Request from %s of length %d into portal %d "
164 "MB="LPX64"\n", libcfs_id2str(src), rlength, index, match_bits);
166 if (index < 0 || index >= the_lnet.ln_nportals) {
167 CERROR("Invalid portal %d not in [0-%d]\n",
168 index, the_lnet.ln_nportals);
169 return LNET_MATCHMD_DROP;
172 cfs_list_for_each_entry_safe_typed (me, tmp, &ptl->ptl_ml,
173 lnet_me_t, me_list) {
176 /* ME attached but MD not attached yet */
180 LASSERT (me == md->md_me);
182 rc = lnet_try_match_md(index, op_mask, src, rlength,
183 roffset, match_bits, md, msg,
184 mlength_out, offset_out);
189 case LNET_MATCHMD_NONE:
192 case LNET_MATCHMD_OK:
194 return LNET_MATCHMD_OK;
196 case LNET_MATCHMD_DROP:
197 return LNET_MATCHMD_DROP;
202 if (op_mask == LNET_MD_OP_GET ||
203 (ptl->ptl_options & LNET_PTL_LAZY) == 0)
204 return LNET_MATCHMD_DROP;
206 return LNET_MATCHMD_NONE;
210 lnet_fail_nid (lnet_nid_t nid, unsigned int threshold)
212 lnet_test_peer_t *tp;
213 struct list_head *el;
214 struct list_head *next;
215 struct list_head cull;
217 LASSERT (the_lnet.ln_init);
219 if (threshold != 0) {
220 /* Adding a new entry */
221 LIBCFS_ALLOC(tp, sizeof(*tp));
226 tp->tp_threshold = threshold;
229 list_add_tail (&tp->tp_list, &the_lnet.ln_test_peers);
234 /* removing entries */
235 CFS_INIT_LIST_HEAD (&cull);
239 list_for_each_safe (el, next, &the_lnet.ln_test_peers) {
240 tp = list_entry (el, lnet_test_peer_t, tp_list);
242 if (tp->tp_threshold == 0 || /* needs culling anyway */
243 nid == LNET_NID_ANY || /* removing all entries */
244 tp->tp_nid == nid) /* matched this one */
246 list_del (&tp->tp_list);
247 list_add (&tp->tp_list, &cull);
253 while (!list_empty (&cull)) {
254 tp = list_entry (cull.next, lnet_test_peer_t, tp_list);
256 list_del (&tp->tp_list);
257 LIBCFS_FREE(tp, sizeof (*tp));
263 fail_peer (lnet_nid_t nid, int outgoing)
265 lnet_test_peer_t *tp;
266 struct list_head *el;
267 struct list_head *next;
268 struct list_head cull;
271 CFS_INIT_LIST_HEAD (&cull);
275 list_for_each_safe (el, next, &the_lnet.ln_test_peers) {
276 tp = list_entry (el, lnet_test_peer_t, tp_list);
278 if (tp->tp_threshold == 0) {
281 /* only cull zombies on outgoing tests,
282 * since we may be at interrupt priority on
283 * incoming messages. */
284 list_del (&tp->tp_list);
285 list_add (&tp->tp_list, &cull);
290 if (tp->tp_nid == LNET_NID_ANY || /* fail every peer */
291 nid == tp->tp_nid) { /* fail this peer */
294 if (tp->tp_threshold != LNET_MD_THRESH_INF) {
297 tp->tp_threshold == 0) {
299 list_del (&tp->tp_list);
300 list_add (&tp->tp_list, &cull);
309 while (!list_empty (&cull)) {
310 tp = list_entry (cull.next, lnet_test_peer_t, tp_list);
311 list_del (&tp->tp_list);
313 LIBCFS_FREE(tp, sizeof (*tp));
320 lnet_iov_nob (unsigned int niov, struct iovec *iov)
322 unsigned int nob = 0;
325 nob += (iov++)->iov_len;
331 lnet_copy_iov2iov (unsigned int ndiov, struct iovec *diov, unsigned int doffset,
332 unsigned int nsiov, struct iovec *siov, unsigned int soffset,
335 /* NB diov, siov are READ-ONLY */
336 unsigned int this_nob;
341 /* skip complete frags before 'doffset' */
343 while (doffset >= diov->iov_len) {
344 doffset -= diov->iov_len;
350 /* skip complete frags before 'soffset' */
352 while (soffset >= siov->iov_len) {
353 soffset -= siov->iov_len;
362 this_nob = MIN(diov->iov_len - doffset,
363 siov->iov_len - soffset);
364 this_nob = MIN(this_nob, nob);
366 memcpy ((char *)diov->iov_base + doffset,
367 (char *)siov->iov_base + soffset, this_nob);
370 if (diov->iov_len > doffset + this_nob) {
378 if (siov->iov_len > soffset + this_nob) {
389 lnet_extract_iov (int dst_niov, struct iovec *dst,
390 int src_niov, struct iovec *src,
391 unsigned int offset, unsigned int len)
393 /* Initialise 'dst' to the subset of 'src' starting at 'offset',
394 * for exactly 'len' bytes, and return the number of entries.
395 * NB not destructive to 'src' */
396 unsigned int frag_len;
399 if (len == 0) /* no data => */
400 return (0); /* no frags */
402 LASSERT (src_niov > 0);
403 while (offset >= src->iov_len) { /* skip initial frags */
404 offset -= src->iov_len;
407 LASSERT (src_niov > 0);
412 LASSERT (src_niov > 0);
413 LASSERT ((int)niov <= dst_niov);
415 frag_len = src->iov_len - offset;
416 dst->iov_base = ((char *)src->iov_base) + offset;
418 if (len <= frag_len) {
423 dst->iov_len = frag_len;
436 lnet_kiov_nob (unsigned int niov, lnet_kiov_t *kiov)
443 lnet_copy_kiov2kiov (unsigned int ndkiov, lnet_kiov_t *dkiov, unsigned int doffset,
444 unsigned int nskiov, lnet_kiov_t *skiov, unsigned int soffset,
451 lnet_copy_kiov2iov (unsigned int niov, struct iovec *iov, unsigned int iovoffset,
452 unsigned int nkiov, lnet_kiov_t *kiov, unsigned int kiovoffset,
459 lnet_copy_iov2kiov (unsigned int nkiov, lnet_kiov_t *kiov, unsigned int kiovoffset,
460 unsigned int niov, struct iovec *iov, unsigned int iovoffset,
467 lnet_extract_kiov (int dst_niov, lnet_kiov_t *dst,
468 int src_niov, lnet_kiov_t *src,
469 unsigned int offset, unsigned int len)
474 #else /* __KERNEL__ */
477 lnet_kiov_nob (unsigned int niov, lnet_kiov_t *kiov)
479 unsigned int nob = 0;
482 nob += (kiov++)->kiov_len;
488 lnet_copy_kiov2kiov (unsigned int ndiov, lnet_kiov_t *diov, unsigned int doffset,
489 unsigned int nsiov, lnet_kiov_t *siov, unsigned int soffset,
492 /* NB diov, siov are READ-ONLY */
493 unsigned int this_nob;
500 LASSERT (!in_interrupt ());
503 while (doffset >= diov->kiov_len) {
504 doffset -= diov->kiov_len;
511 while (soffset >= siov->kiov_len) {
512 soffset -= siov->kiov_len;
521 this_nob = MIN(diov->kiov_len - doffset,
522 siov->kiov_len - soffset);
523 this_nob = MIN(this_nob, nob);
526 daddr = ((char *)cfs_kmap(diov->kiov_page)) +
527 diov->kiov_offset + doffset;
529 saddr = ((char *)cfs_kmap(siov->kiov_page)) +
530 siov->kiov_offset + soffset;
532 /* Vanishing risk of kmap deadlock when mapping 2 pages.
533 * However in practice at least one of the kiovs will be mapped
534 * kernel pages and the map/unmap will be NOOPs */
536 memcpy (daddr, saddr, this_nob);
539 if (diov->kiov_len > doffset + this_nob) {
543 cfs_kunmap(diov->kiov_page);
550 if (siov->kiov_len > soffset + this_nob) {
554 cfs_kunmap(siov->kiov_page);
563 cfs_kunmap(diov->kiov_page);
565 cfs_kunmap(siov->kiov_page);
569 lnet_copy_kiov2iov (unsigned int niov, struct iovec *iov, unsigned int iovoffset,
570 unsigned int nkiov, lnet_kiov_t *kiov, unsigned int kiovoffset,
573 /* NB iov, kiov are READ-ONLY */
574 unsigned int this_nob;
580 LASSERT (!in_interrupt ());
583 while (iovoffset >= iov->iov_len) {
584 iovoffset -= iov->iov_len;
591 while (kiovoffset >= kiov->kiov_len) {
592 kiovoffset -= kiov->kiov_len;
601 this_nob = MIN(iov->iov_len - iovoffset,
602 kiov->kiov_len - kiovoffset);
603 this_nob = MIN(this_nob, nob);
606 addr = ((char *)cfs_kmap(kiov->kiov_page)) +
607 kiov->kiov_offset + kiovoffset;
609 memcpy ((char *)iov->iov_base + iovoffset, addr, this_nob);
612 if (iov->iov_len > iovoffset + this_nob) {
613 iovoffset += this_nob;
620 if (kiov->kiov_len > kiovoffset + this_nob) {
622 kiovoffset += this_nob;
624 cfs_kunmap(kiov->kiov_page);
634 cfs_kunmap(kiov->kiov_page);
638 lnet_copy_iov2kiov (unsigned int nkiov, lnet_kiov_t *kiov, unsigned int kiovoffset,
639 unsigned int niov, struct iovec *iov, unsigned int iovoffset,
642 /* NB kiov, iov are READ-ONLY */
643 unsigned int this_nob;
649 LASSERT (!in_interrupt ());
652 while (kiovoffset >= kiov->kiov_len) {
653 kiovoffset -= kiov->kiov_len;
660 while (iovoffset >= iov->iov_len) {
661 iovoffset -= iov->iov_len;
670 this_nob = MIN(kiov->kiov_len - kiovoffset,
671 iov->iov_len - iovoffset);
672 this_nob = MIN(this_nob, nob);
675 addr = ((char *)cfs_kmap(kiov->kiov_page)) +
676 kiov->kiov_offset + kiovoffset;
678 memcpy (addr, (char *)iov->iov_base + iovoffset, this_nob);
681 if (kiov->kiov_len > kiovoffset + this_nob) {
683 kiovoffset += this_nob;
685 cfs_kunmap(kiov->kiov_page);
692 if (iov->iov_len > iovoffset + this_nob) {
693 iovoffset += this_nob;
702 cfs_kunmap(kiov->kiov_page);
706 lnet_extract_kiov (int dst_niov, lnet_kiov_t *dst,
707 int src_niov, lnet_kiov_t *src,
708 unsigned int offset, unsigned int len)
710 /* Initialise 'dst' to the subset of 'src' starting at 'offset',
711 * for exactly 'len' bytes, and return the number of entries.
712 * NB not destructive to 'src' */
713 unsigned int frag_len;
716 if (len == 0) /* no data => */
717 return (0); /* no frags */
719 LASSERT (src_niov > 0);
720 while (offset >= src->kiov_len) { /* skip initial frags */
721 offset -= src->kiov_len;
724 LASSERT (src_niov > 0);
729 LASSERT (src_niov > 0);
730 LASSERT ((int)niov <= dst_niov);
732 frag_len = src->kiov_len - offset;
733 dst->kiov_page = src->kiov_page;
734 dst->kiov_offset = src->kiov_offset + offset;
736 if (len <= frag_len) {
738 LASSERT (dst->kiov_offset + dst->kiov_len <= CFS_PAGE_SIZE);
742 dst->kiov_len = frag_len;
743 LASSERT (dst->kiov_offset + dst->kiov_len <= CFS_PAGE_SIZE);
756 lnet_ni_recv(lnet_ni_t *ni, void *private, lnet_msg_t *msg, int delayed,
757 unsigned int offset, unsigned int mlen, unsigned int rlen)
759 unsigned int niov = 0;
760 struct iovec *iov = NULL;
761 lnet_kiov_t *kiov = NULL;
764 LASSERT (!in_interrupt ());
765 LASSERT (mlen == 0 || msg != NULL);
768 LASSERT(msg->msg_receiving);
769 LASSERT(!msg->msg_sending);
770 LASSERT(rlen == msg->msg_len);
771 LASSERT(mlen <= msg->msg_len);
773 msg->msg_wanted = mlen;
774 msg->msg_offset = offset;
775 msg->msg_receiving = 0;
778 niov = msg->msg_niov;
780 kiov = msg->msg_kiov;
783 LASSERT ((iov == NULL) != (kiov == NULL));
787 rc = (ni->ni_lnd->lnd_recv)(ni, private, msg, delayed,
788 niov, iov, kiov, offset, mlen, rlen);
790 lnet_finalize(ni, msg, rc);
794 lnet_compare_routers(lnet_peer_t *p1, lnet_peer_t *p2)
796 if (p1->lp_txqnob < p2->lp_txqnob)
799 if (p1->lp_txqnob > p2->lp_txqnob)
802 if (p1->lp_txcredits > p2->lp_txcredits)
805 if (p1->lp_txcredits < p2->lp_txcredits)
813 lnet_setpayloadbuffer(lnet_msg_t *msg)
815 lnet_libmd_t *md = msg->msg_md;
817 LASSERT (msg->msg_len > 0);
818 LASSERT (!msg->msg_routing);
819 LASSERT (md != NULL);
820 LASSERT (msg->msg_niov == 0);
821 LASSERT (msg->msg_iov == NULL);
822 LASSERT (msg->msg_kiov == NULL);
824 msg->msg_niov = md->md_niov;
825 if ((md->md_options & LNET_MD_KIOV) != 0)
826 msg->msg_kiov = md->md_iov.kiov;
828 msg->msg_iov = md->md_iov.iov;
832 lnet_prep_send(lnet_msg_t *msg, int type, lnet_process_id_t target,
833 unsigned int offset, unsigned int len)
835 msg->msg_type = type;
836 msg->msg_target = target;
838 msg->msg_offset = offset;
841 lnet_setpayloadbuffer(msg);
843 memset (&msg->msg_hdr, 0, sizeof (msg->msg_hdr));
844 msg->msg_hdr.type = cpu_to_le32(type);
845 msg->msg_hdr.dest_nid = cpu_to_le64(target.nid);
846 msg->msg_hdr.dest_pid = cpu_to_le32(target.pid);
847 /* src_nid will be set later */
848 msg->msg_hdr.src_pid = cpu_to_le32(the_lnet.ln_pid);
849 msg->msg_hdr.payload_length = cpu_to_le32(len);
853 lnet_ni_send(lnet_ni_t *ni, lnet_msg_t *msg)
855 void *priv = msg->msg_private;
858 LASSERT (!in_interrupt ());
859 LASSERT (LNET_NETTYP(LNET_NIDNET(ni->ni_nid)) == LOLND ||
860 (msg->msg_txcredit && msg->msg_peertxcredit));
862 rc = (ni->ni_lnd->lnd_send)(ni, priv, msg);
864 lnet_finalize(ni, msg, rc);
868 lnet_eager_recv_locked(lnet_msg_t *msg)
874 LASSERT (!msg->msg_delayed);
875 msg->msg_delayed = 1;
877 LASSERT (msg->msg_receiving);
878 LASSERT (!msg->msg_sending);
880 peer = msg->msg_rxpeer;
883 if (ni->ni_lnd->lnd_eager_recv != NULL) {
886 rc = (ni->ni_lnd->lnd_eager_recv)(ni, msg->msg_private, msg,
889 CERROR("recv from %s / send to %s aborted: "
890 "eager_recv failed %d\n",
891 libcfs_nid2str(peer->lp_nid),
892 libcfs_id2str(msg->msg_target), rc);
893 LASSERT (rc < 0); /* required by my callers */
903 lnet_post_send_locked (lnet_msg_t *msg, int do_send)
905 /* lnet_send is going to LNET_UNLOCK immediately after this, so it sets
906 * do_send FALSE and I don't do the unlock/send/lock bit. I return
907 * EAGAIN if msg blocked and 0 if sent or OK to send */
908 lnet_peer_t *lp = msg->msg_txpeer;
909 lnet_ni_t *ni = lp->lp_ni;
911 /* non-lnet_send() callers have checked before */
912 LASSERT (!do_send || msg->msg_delayed);
913 LASSERT (!msg->msg_receiving);
915 if (!msg->msg_peertxcredit) {
916 LASSERT ((lp->lp_txcredits < 0) == !list_empty(&lp->lp_txq));
918 msg->msg_peertxcredit = 1;
919 lp->lp_txqnob += msg->msg_len + sizeof(lnet_hdr_t);
922 if (lp->lp_txcredits < lp->lp_mintxcredits)
923 lp->lp_mintxcredits = lp->lp_txcredits;
925 if (lp->lp_txcredits < 0) {
926 msg->msg_delayed = 1;
927 list_add_tail (&msg->msg_list, &lp->lp_txq);
932 if (!msg->msg_txcredit) {
933 LASSERT ((ni->ni_txcredits < 0) == !list_empty(&ni->ni_txq));
935 msg->msg_txcredit = 1;
938 if (ni->ni_txcredits < ni->ni_mintxcredits)
939 ni->ni_mintxcredits = ni->ni_txcredits;
941 if (ni->ni_txcredits < 0) {
942 msg->msg_delayed = 1;
943 list_add_tail (&msg->msg_list, &ni->ni_txq);
950 lnet_ni_send(ni, msg);
958 lnet_commit_routedmsg (lnet_msg_t *msg)
960 /* ALWAYS called holding the LNET_LOCK */
961 LASSERT (msg->msg_routing);
963 the_lnet.ln_counters.msgs_alloc++;
964 if (the_lnet.ln_counters.msgs_alloc >
965 the_lnet.ln_counters.msgs_max)
966 the_lnet.ln_counters.msgs_max =
967 the_lnet.ln_counters.msgs_alloc;
969 the_lnet.ln_counters.route_count++;
970 the_lnet.ln_counters.route_length += msg->msg_len;
972 LASSERT (!msg->msg_onactivelist);
973 msg->msg_onactivelist = 1;
974 list_add (&msg->msg_activelist, &the_lnet.ln_active_msgs);
978 lnet_msg2bufpool(lnet_msg_t *msg)
980 lnet_rtrbufpool_t *rbp = &the_lnet.ln_rtrpools[0];
982 LASSERT (msg->msg_len <= LNET_MTU);
983 while (msg->msg_len > (unsigned int)rbp->rbp_npages * CFS_PAGE_SIZE) {
985 LASSERT (rbp < &the_lnet.ln_rtrpools[LNET_NRBPOOLS]);
992 lnet_post_routed_recv_locked (lnet_msg_t *msg, int do_recv)
994 /* lnet_parse is going to LNET_UNLOCK immediately after this, so it
995 * sets do_recv FALSE and I don't do the unlock/send/lock bit. I
996 * return EAGAIN if msg blocked and 0 if sent or OK to send */
997 lnet_peer_t *lp = msg->msg_rxpeer;
998 lnet_rtrbufpool_t *rbp;
1001 LASSERT (msg->msg_iov == NULL);
1002 LASSERT (msg->msg_kiov == NULL);
1003 LASSERT (msg->msg_niov == 0);
1004 LASSERT (msg->msg_routing);
1005 LASSERT (msg->msg_receiving);
1006 LASSERT (!msg->msg_sending);
1008 /* non-lnet_parse callers only send delayed messages */
1009 LASSERT (!do_recv || msg->msg_delayed);
1011 if (!msg->msg_peerrtrcredit) {
1012 LASSERT ((lp->lp_rtrcredits < 0) == !list_empty(&lp->lp_rtrq));
1014 msg->msg_peerrtrcredit = 1;
1015 lp->lp_rtrcredits--;
1016 if (lp->lp_rtrcredits < lp->lp_minrtrcredits)
1017 lp->lp_minrtrcredits = lp->lp_rtrcredits;
1019 if (lp->lp_rtrcredits < 0) {
1020 /* must have checked eager_recv before here */
1021 LASSERT (msg->msg_delayed);
1022 list_add_tail(&msg->msg_list, &lp->lp_rtrq);
1027 rbp = lnet_msg2bufpool(msg);
1029 if (!msg->msg_rtrcredit) {
1030 LASSERT ((rbp->rbp_credits < 0) == !list_empty(&rbp->rbp_msgs));
1032 msg->msg_rtrcredit = 1;
1034 if (rbp->rbp_credits < rbp->rbp_mincredits)
1035 rbp->rbp_mincredits = rbp->rbp_credits;
1037 if (rbp->rbp_credits < 0) {
1038 /* must have checked eager_recv before here */
1039 LASSERT (msg->msg_delayed);
1040 list_add_tail(&msg->msg_list, &rbp->rbp_msgs);
1045 LASSERT (!list_empty(&rbp->rbp_bufs));
1046 rb = list_entry(rbp->rbp_bufs.next, lnet_rtrbuf_t, rb_list);
1047 list_del(&rb->rb_list);
1049 msg->msg_niov = rbp->rbp_npages;
1050 msg->msg_kiov = &rb->rb_kiov[0];
1054 lnet_ni_recv(lp->lp_ni, msg->msg_private, msg, 1,
1055 0, msg->msg_len, msg->msg_len);
1063 lnet_return_credits_locked (lnet_msg_t *msg)
1065 lnet_peer_t *txpeer = msg->msg_txpeer;
1066 lnet_peer_t *rxpeer = msg->msg_rxpeer;
1070 if (msg->msg_txcredit) {
1071 /* give back NI txcredits */
1072 msg->msg_txcredit = 0;
1075 LASSERT((ni->ni_txcredits < 0) == !list_empty(&ni->ni_txq));
1078 if (ni->ni_txcredits <= 0) {
1079 msg2 = list_entry(ni->ni_txq.next, lnet_msg_t, msg_list);
1080 list_del(&msg2->msg_list);
1082 LASSERT(msg2->msg_txpeer->lp_ni == ni);
1083 LASSERT(msg2->msg_delayed);
1085 (void) lnet_post_send_locked(msg2, 1);
1089 if (msg->msg_peertxcredit) {
1090 /* give back peer txcredits */
1091 msg->msg_peertxcredit = 0;
1093 LASSERT((txpeer->lp_txcredits < 0) == !list_empty(&txpeer->lp_txq));
1095 txpeer->lp_txqnob -= msg->msg_len + sizeof(lnet_hdr_t);
1096 LASSERT (txpeer->lp_txqnob >= 0);
1098 txpeer->lp_txcredits++;
1099 if (txpeer->lp_txcredits <= 0) {
1100 msg2 = list_entry(txpeer->lp_txq.next,
1101 lnet_msg_t, msg_list);
1102 list_del(&msg2->msg_list);
1104 LASSERT (msg2->msg_txpeer == txpeer);
1105 LASSERT (msg2->msg_delayed);
1107 (void) lnet_post_send_locked(msg2, 1);
1111 if (txpeer != NULL) {
1112 msg->msg_txpeer = NULL;
1113 lnet_peer_decref_locked(txpeer);
1117 if (msg->msg_rtrcredit) {
1118 /* give back global router credits */
1120 lnet_rtrbufpool_t *rbp;
1122 /* NB If a msg ever blocks for a buffer in rbp_msgs, it stays
1123 * there until it gets one allocated, or aborts the wait
1125 LASSERT (msg->msg_kiov != NULL);
1127 rb = list_entry(msg->msg_kiov, lnet_rtrbuf_t, rb_kiov[0]);
1129 LASSERT (rbp == lnet_msg2bufpool(msg));
1131 msg->msg_kiov = NULL;
1132 msg->msg_rtrcredit = 0;
1134 LASSERT((rbp->rbp_credits < 0) == !list_empty(&rbp->rbp_msgs));
1135 LASSERT((rbp->rbp_credits > 0) == !list_empty(&rbp->rbp_bufs));
1137 list_add(&rb->rb_list, &rbp->rbp_bufs);
1139 if (rbp->rbp_credits <= 0) {
1140 msg2 = list_entry(rbp->rbp_msgs.next,
1141 lnet_msg_t, msg_list);
1142 list_del(&msg2->msg_list);
1144 (void) lnet_post_routed_recv_locked(msg2, 1);
1148 if (msg->msg_peerrtrcredit) {
1149 /* give back peer router credits */
1150 msg->msg_peerrtrcredit = 0;
1152 LASSERT((rxpeer->lp_rtrcredits < 0) == !list_empty(&rxpeer->lp_rtrq));
1154 rxpeer->lp_rtrcredits++;
1155 if (rxpeer->lp_rtrcredits <= 0) {
1156 msg2 = list_entry(rxpeer->lp_rtrq.next,
1157 lnet_msg_t, msg_list);
1158 list_del(&msg2->msg_list);
1160 (void) lnet_post_routed_recv_locked(msg2, 1);
1164 LASSERT (!msg->msg_rtrcredit);
1165 LASSERT (!msg->msg_peerrtrcredit);
1167 if (rxpeer != NULL) {
1168 msg->msg_rxpeer = NULL;
1169 lnet_peer_decref_locked(rxpeer);
1174 lnet_send(lnet_nid_t src_nid, lnet_msg_t *msg)
1176 lnet_nid_t dst_nid = msg->msg_target.nid;
1178 lnet_ni_t *local_ni;
1179 lnet_remotenet_t *rnet;
1180 lnet_route_t *route;
1181 lnet_route_t *best_route;
1182 struct list_head *tmp;
1187 LASSERT (msg->msg_txpeer == NULL);
1188 LASSERT (!msg->msg_sending);
1189 LASSERT (!msg->msg_target_is_router);
1190 LASSERT (!msg->msg_receiving);
1192 msg->msg_sending = 1;
1194 /* NB! ni != NULL == interface pre-determined (ACK/REPLY) */
1198 if (the_lnet.ln_shutdown) {
1203 if (src_nid == LNET_NID_ANY) {
1206 src_ni = lnet_nid2ni_locked(src_nid);
1207 if (src_ni == NULL) {
1209 CERROR("Can't send to %s: src %s is not a local nid\n",
1210 libcfs_nid2str(dst_nid), libcfs_nid2str(src_nid));
1213 LASSERT (!msg->msg_routing);
1216 /* Is this for someone on a local network? */
1217 local_ni = lnet_net2ni_locked(LNET_NIDNET(dst_nid));
1219 if (local_ni != NULL) {
1220 if (src_ni == NULL) {
1222 src_nid = src_ni->ni_nid;
1223 } else if (src_ni == local_ni) {
1224 lnet_ni_decref_locked(local_ni);
1226 lnet_ni_decref_locked(local_ni);
1227 lnet_ni_decref_locked(src_ni);
1229 CERROR("no route to %s via from %s\n",
1230 libcfs_nid2str(dst_nid), libcfs_nid2str(src_nid));
1234 LASSERT (src_nid != LNET_NID_ANY);
1236 if (!msg->msg_routing)
1237 msg->msg_hdr.src_nid = cpu_to_le64(src_nid);
1239 if (src_ni == the_lnet.ln_loni) {
1240 /* No send credit hassles with LOLND */
1242 lnet_ni_send(src_ni, msg);
1243 lnet_ni_decref(src_ni);
1247 rc = lnet_nid2peer_locked(&lp, dst_nid);
1248 lnet_ni_decref_locked(src_ni); /* lp has ref on src_ni; lose mine */
1251 CERROR("Error %d finding peer %s\n", rc,
1252 libcfs_nid2str(dst_nid));
1253 /* ENOMEM or shutting down */
1256 LASSERT (lp->lp_ni == src_ni);
1258 /* sending to a remote network */
1259 rnet = lnet_find_net_locked(LNET_NIDNET(dst_nid));
1262 lnet_ni_decref_locked(src_ni);
1264 CERROR("No route to %s\n", libcfs_id2str(msg->msg_target));
1265 return -EHOSTUNREACH;
1268 /* Find the best gateway I can use */
1271 list_for_each(tmp, &rnet->lrn_routes) {
1272 route = list_entry(tmp, lnet_route_t, lr_list);
1273 lp2 = route->lr_gateway;
1275 if (lp2->lp_alive &&
1276 (src_ni == NULL || lp2->lp_ni == src_ni) &&
1277 (lp == NULL || lnet_compare_routers(lp2, lp) > 0)) {
1285 lnet_ni_decref_locked(src_ni);
1287 CERROR("No route to %s (all routers down)\n",
1288 libcfs_id2str(msg->msg_target));
1289 return -EHOSTUNREACH;
1292 /* Place selected route at the end of the route list to ensure
1293 * fairness; everything else being equal... */
1294 list_del(&best_route->lr_list);
1295 list_add_tail(&best_route->lr_list, &rnet->lrn_routes);
1297 if (src_ni == NULL) {
1299 src_nid = src_ni->ni_nid;
1301 LASSERT (src_ni == lp->lp_ni);
1302 lnet_ni_decref_locked(src_ni);
1305 lnet_peer_addref_locked(lp);
1307 LASSERT (src_nid != LNET_NID_ANY);
1309 if (!msg->msg_routing) {
1310 /* I'm the source and now I know which NI to send on */
1311 msg->msg_hdr.src_nid = cpu_to_le64(src_nid);
1314 msg->msg_target_is_router = 1;
1315 msg->msg_target.nid = lp->lp_nid;
1316 msg->msg_target.pid = LUSTRE_SRV_LNET_PID;
1319 /* 'lp' is our best choice of peer */
1321 LASSERT (!msg->msg_peertxcredit);
1322 LASSERT (!msg->msg_txcredit);
1323 LASSERT (msg->msg_txpeer == NULL);
1325 msg->msg_txpeer = lp; /* msg takes my ref on lp */
1327 rc = lnet_post_send_locked(msg, 0);
1331 lnet_ni_send(src_ni, msg);
1337 lnet_commit_md (lnet_libmd_t *md, lnet_msg_t *msg)
1339 /* ALWAYS called holding the LNET_LOCK */
1340 /* Here, we commit the MD to a network OP by marking it busy and
1341 * decrementing its threshold. Come what may, the network "owns"
1342 * the MD until a call to lnet_finalize() signals completion. */
1343 LASSERT (!msg->msg_routing);
1348 if (md->md_threshold != LNET_MD_THRESH_INF) {
1349 LASSERT (md->md_threshold > 0);
1353 the_lnet.ln_counters.msgs_alloc++;
1354 if (the_lnet.ln_counters.msgs_alloc >
1355 the_lnet.ln_counters.msgs_max)
1356 the_lnet.ln_counters.msgs_max =
1357 the_lnet.ln_counters.msgs_alloc;
1359 LASSERT (!msg->msg_onactivelist);
1360 msg->msg_onactivelist = 1;
1361 list_add (&msg->msg_activelist, &the_lnet.ln_active_msgs);
1365 lnet_drop_message (lnet_ni_t *ni, void *private, unsigned int nob)
1368 the_lnet.ln_counters.drop_count++;
1369 the_lnet.ln_counters.drop_length += nob;
1372 lnet_ni_recv(ni, private, NULL, 0, 0, 0, nob);
1376 lnet_drop_delayed_put(lnet_msg_t *msg, char *reason)
1378 lnet_process_id_t id = {0};
1380 id.nid = msg->msg_hdr.src_nid;
1381 id.pid = msg->msg_hdr.src_pid;
1383 LASSERT (msg->msg_md == NULL);
1384 LASSERT (msg->msg_delayed);
1385 LASSERT (msg->msg_rxpeer != NULL);
1386 LASSERT (msg->msg_hdr.type == LNET_MSG_PUT);
1388 CWARN("Dropping delayed PUT from %s portal %d match "LPU64
1389 " offset %d length %d: %s\n",
1391 msg->msg_hdr.msg.put.ptl_index,
1392 msg->msg_hdr.msg.put.match_bits,
1393 msg->msg_hdr.msg.put.offset,
1394 msg->msg_hdr.payload_length,
1397 /* NB I can't drop msg's ref on msg_rxpeer until after I've
1398 * called lnet_drop_message(), so I just hang onto msg as well
1399 * until that's done */
1401 lnet_drop_message(msg->msg_rxpeer->lp_ni,
1402 msg->msg_private, msg->msg_len);
1406 lnet_peer_decref_locked(msg->msg_rxpeer);
1407 msg->msg_rxpeer = NULL;
1415 LNetSetLazyPortal(int portal)
1417 lnet_portal_t *ptl = &the_lnet.ln_portals[portal];
1419 if (portal < 0 || portal >= the_lnet.ln_nportals)
1422 CDEBUG(D_NET, "Setting portal %d lazy\n", portal);
1426 ptl->ptl_options |= LNET_PTL_LAZY;
1434 LNetClearLazyPortal(int portal)
1436 struct list_head zombies;
1437 lnet_portal_t *ptl = &the_lnet.ln_portals[portal];
1440 if (portal < 0 || portal >= the_lnet.ln_nportals)
1445 if ((ptl->ptl_options & LNET_PTL_LAZY) == 0) {
1450 if (the_lnet.ln_shutdown)
1451 CWARN ("Active lazy portal %d on exit\n", portal);
1453 CDEBUG (D_NET, "clearing portal %d lazy\n", portal);
1455 /* grab all the blocked messages atomically */
1456 list_add(&zombies, &ptl->ptl_msgq);
1457 list_del_init(&ptl->ptl_msgq);
1459 ptl->ptl_msgq_version++;
1460 ptl->ptl_options &= ~LNET_PTL_LAZY;
1464 while (!list_empty(&zombies)) {
1465 msg = list_entry(zombies.next, lnet_msg_t, msg_list);
1466 list_del(&msg->msg_list);
1468 lnet_drop_delayed_put(msg, "Clearing lazy portal attr");
1475 lnet_recv_put(lnet_libmd_t *md, lnet_msg_t *msg, int delayed,
1476 unsigned int offset, unsigned int mlength)
1478 lnet_hdr_t *hdr = &msg->msg_hdr;
1482 the_lnet.ln_counters.recv_count++;
1483 the_lnet.ln_counters.recv_length += mlength;
1488 lnet_setpayloadbuffer(msg);
1490 msg->msg_ev.type = LNET_EVENT_PUT;
1491 msg->msg_ev.target.pid = hdr->dest_pid;
1492 msg->msg_ev.target.nid = hdr->dest_nid;
1493 msg->msg_ev.hdr_data = hdr->msg.put.hdr_data;
1495 /* Must I ACK? If so I'll grab the ack_wmd out of the header and put
1496 * it back into the ACK during lnet_finalize() */
1497 msg->msg_ack = (!lnet_is_wire_handle_none(&hdr->msg.put.ack_wmd) &&
1498 (md->md_options & LNET_MD_ACK_DISABLE) == 0);
1500 lnet_ni_recv(msg->msg_rxpeer->lp_ni,
1502 msg, delayed, offset, mlength,
1503 hdr->payload_length);
1506 /* called with LNET_LOCK held */
1508 lnet_match_blocked_msg(lnet_libmd_t *md)
1510 CFS_LIST_HEAD (drops);
1511 CFS_LIST_HEAD (matches);
1512 struct list_head *tmp;
1513 struct list_head *entry;
1515 lnet_me_t *me = md->md_me;
1516 lnet_portal_t *ptl = &the_lnet.ln_portals[me->me_portal];
1518 LASSERT (me->me_portal < (unsigned int)the_lnet.ln_nportals);
1520 if ((ptl->ptl_options & LNET_PTL_LAZY) == 0) {
1521 LASSERT (list_empty(&ptl->ptl_msgq));
1525 LASSERT (md->md_refcount == 0); /* a brand new MD */
1527 list_for_each_safe (entry, tmp, &ptl->ptl_msgq) {
1530 unsigned int mlength;
1531 unsigned int offset;
1533 lnet_process_id_t src;
1535 msg = list_entry(entry, lnet_msg_t, msg_list);
1537 LASSERT (msg->msg_delayed);
1539 hdr = &msg->msg_hdr;
1540 index = hdr->msg.put.ptl_index;
1542 src.nid = hdr->src_nid;
1543 src.pid = hdr->src_pid;
1545 rc = lnet_try_match_md(index, LNET_MD_OP_PUT, src,
1546 hdr->payload_length,
1547 hdr->msg.put.offset,
1548 hdr->msg.put.match_bits,
1549 md, msg, &mlength, &offset);
1551 if (rc == LNET_MATCHMD_NONE)
1554 /* Hurrah! This _is_ a match */
1555 list_del(&msg->msg_list);
1556 ptl->ptl_msgq_version++;
1558 if (rc == LNET_MATCHMD_OK) {
1559 list_add_tail(&msg->msg_list, &matches);
1561 CDEBUG(D_NET, "Resuming delayed PUT from %s portal %d "
1562 "match "LPU64" offset %d length %d.\n",
1564 hdr->msg.put.ptl_index,
1565 hdr->msg.put.match_bits,
1566 hdr->msg.put.offset,
1567 hdr->payload_length);
1569 LASSERT (rc == LNET_MATCHMD_DROP);
1571 list_add_tail(&msg->msg_list, &drops);
1574 if (lnet_md_exhausted(md))
1580 list_for_each_safe (entry, tmp, &drops) {
1581 msg = list_entry(entry, lnet_msg_t, msg_list);
1583 list_del(&msg->msg_list);
1585 lnet_drop_delayed_put(msg, "Bad match");
1588 list_for_each_safe (entry, tmp, &matches) {
1589 msg = list_entry(entry, lnet_msg_t, msg_list);
1591 list_del(&msg->msg_list);
1593 /* md won't disappear under me, since each msg
1594 * holds a ref on it */
1595 lnet_recv_put(md, msg, 1,
1597 msg->msg_ev.mlength);
1604 lnet_parse_put(lnet_ni_t *ni, lnet_msg_t *msg)
1608 lnet_hdr_t *hdr = &msg->msg_hdr;
1609 unsigned int rlength = hdr->payload_length;
1610 unsigned int mlength = 0;
1611 unsigned int offset = 0;
1612 lnet_process_id_t src= {0};
1615 src.nid = hdr->src_nid;
1616 src.pid = hdr->src_pid;
1618 /* Convert put fields to host byte order */
1619 hdr->msg.put.match_bits = le64_to_cpu(hdr->msg.put.match_bits);
1620 hdr->msg.put.ptl_index = le32_to_cpu(hdr->msg.put.ptl_index);
1621 hdr->msg.put.offset = le32_to_cpu(hdr->msg.put.offset);
1623 index = hdr->msg.put.ptl_index;
1627 rc = lnet_match_md(index, LNET_MD_OP_PUT, src,
1628 rlength, hdr->msg.put.offset,
1629 hdr->msg.put.match_bits, msg,
1630 &mlength, &offset, &md);
1635 case LNET_MATCHMD_OK:
1637 lnet_recv_put(md, msg, 0, offset, mlength);
1640 case LNET_MATCHMD_NONE:
1641 rc = lnet_eager_recv_locked(msg);
1642 if (rc == 0 && !the_lnet.ln_shutdown) {
1643 list_add_tail(&msg->msg_list,
1644 &the_lnet.ln_portals[index].ptl_msgq);
1646 the_lnet.ln_portals[index].ptl_msgq_version++;
1648 CDEBUG(D_NET, "Delaying PUT from %s portal %d match "
1649 LPU64" offset %d length %d: no match \n",
1650 libcfs_id2str(src), index,
1651 hdr->msg.put.match_bits,
1652 hdr->msg.put.offset, rlength);
1659 case LNET_MATCHMD_DROP:
1661 "Dropping PUT from %s portal %d match "LPU64
1662 " offset %d length %d: %d\n",
1663 libcfs_id2str(src), index,
1664 hdr->msg.put.match_bits,
1665 hdr->msg.put.offset, rlength, rc);
1668 return ENOENT; /* +ve: OK but no match */
1673 lnet_parse_get(lnet_ni_t *ni, lnet_msg_t *msg, int rdma_get)
1675 lnet_hdr_t *hdr = &msg->msg_hdr;
1676 unsigned int mlength = 0;
1677 unsigned int offset = 0;
1678 lnet_process_id_t src = {0};
1679 lnet_handle_wire_t reply_wmd;
1683 src.nid = hdr->src_nid;
1684 src.pid = hdr->src_pid;
1686 /* Convert get fields to host byte order */
1687 hdr->msg.get.match_bits = le64_to_cpu(hdr->msg.get.match_bits);
1688 hdr->msg.get.ptl_index = le32_to_cpu(hdr->msg.get.ptl_index);
1689 hdr->msg.get.sink_length = le32_to_cpu(hdr->msg.get.sink_length);
1690 hdr->msg.get.src_offset = le32_to_cpu(hdr->msg.get.src_offset);
1694 rc = lnet_match_md(hdr->msg.get.ptl_index, LNET_MD_OP_GET, src,
1695 hdr->msg.get.sink_length, hdr->msg.get.src_offset,
1696 hdr->msg.get.match_bits, msg,
1697 &mlength, &offset, &md);
1698 if (rc == LNET_MATCHMD_DROP) {
1700 "Dropping GET from %s portal %d match "LPU64
1701 " offset %d length %d\n",
1703 hdr->msg.get.ptl_index,
1704 hdr->msg.get.match_bits,
1705 hdr->msg.get.src_offset,
1706 hdr->msg.get.sink_length);
1708 return ENOENT; /* +ve: OK but no match */
1711 LASSERT (rc == LNET_MATCHMD_OK);
1713 the_lnet.ln_counters.send_count++;
1714 the_lnet.ln_counters.send_length += mlength;
1718 msg->msg_ev.type = LNET_EVENT_GET;
1719 msg->msg_ev.target.pid = hdr->dest_pid;
1720 msg->msg_ev.target.nid = hdr->dest_nid;
1721 msg->msg_ev.hdr_data = 0;
1723 reply_wmd = hdr->msg.get.return_wmd;
1725 lnet_prep_send(msg, LNET_MSG_REPLY, src, offset, mlength);
1727 msg->msg_hdr.msg.reply.dst_wmd = reply_wmd;
1730 /* The LND completes the REPLY from her recv procedure */
1731 lnet_ni_recv(ni, msg->msg_private, msg, 0,
1732 msg->msg_offset, msg->msg_len, msg->msg_len);
1736 lnet_ni_recv(ni, msg->msg_private, NULL, 0, 0, 0, 0);
1737 msg->msg_receiving = 0;
1739 rc = lnet_send(ni->ni_nid, msg);
1741 /* didn't get as far as lnet_ni_send() */
1742 CERROR("%s: Unable to send REPLY for GET from %s: %d\n",
1743 libcfs_nid2str(ni->ni_nid), libcfs_id2str(src), rc);
1745 lnet_finalize(ni, msg, rc);
1752 lnet_parse_reply(lnet_ni_t *ni, lnet_msg_t *msg)
1754 void *private = msg->msg_private;
1755 lnet_hdr_t *hdr = &msg->msg_hdr;
1756 lnet_process_id_t src = {0};
1763 src.nid = hdr->src_nid;
1764 src.pid = hdr->src_pid;
1766 /* NB handles only looked up by creator (no flips) */
1767 md = lnet_wire_handle2md(&hdr->msg.reply.dst_wmd);
1768 if (md == NULL || md->md_threshold == 0 || md->md_me != NULL) {
1769 CDEBUG(D_NETERROR, "%s: Dropping REPLY from %s for %s "
1770 "MD "LPX64"."LPX64"\n",
1771 libcfs_nid2str(ni->ni_nid), libcfs_id2str(src),
1772 (md == NULL) ? "invalid" : "inactive",
1773 hdr->msg.reply.dst_wmd.wh_interface_cookie,
1774 hdr->msg.reply.dst_wmd.wh_object_cookie);
1775 if (md != NULL && md->md_me != NULL)
1776 CERROR("REPLY MD also attached to portal %d\n",
1777 md->md_me->me_portal);
1780 return ENOENT; /* +ve: OK but no match */
1783 LASSERT (md->md_offset == 0);
1785 rlength = hdr->payload_length;
1786 mlength = MIN(rlength, (int)md->md_length);
1788 if (mlength < rlength &&
1789 (md->md_options & LNET_MD_TRUNCATE) == 0) {
1790 CDEBUG(D_NETERROR, "%s: Dropping REPLY from %s length %d "
1791 "for MD "LPX64" would overflow (%d)\n",
1792 libcfs_nid2str(ni->ni_nid), libcfs_id2str(src),
1793 rlength, hdr->msg.reply.dst_wmd.wh_object_cookie,
1796 return ENOENT; /* +ve: OK but no match */
1799 CDEBUG(D_NET, "%s: Reply from %s of length %d/%d into md "LPX64"\n",
1800 libcfs_nid2str(ni->ni_nid), libcfs_id2str(src),
1801 mlength, rlength, hdr->msg.reply.dst_wmd.wh_object_cookie);
1803 lnet_commit_md(md, msg);
1806 lnet_setpayloadbuffer(msg);
1808 msg->msg_ev.type = LNET_EVENT_REPLY;
1809 msg->msg_ev.target.pid = hdr->dest_pid;
1810 msg->msg_ev.target.nid = hdr->dest_nid;
1811 msg->msg_ev.initiator = src;
1812 msg->msg_ev.rlength = rlength;
1813 msg->msg_ev.mlength = mlength;
1814 msg->msg_ev.offset = 0;
1816 lnet_md_deconstruct(md, &msg->msg_ev.md);
1817 lnet_md2handle(&msg->msg_ev.md_handle, md);
1819 the_lnet.ln_counters.recv_count++;
1820 the_lnet.ln_counters.recv_length += mlength;
1824 lnet_ni_recv(ni, private, msg, 0, 0, mlength, rlength);
1829 lnet_parse_ack(lnet_ni_t *ni, lnet_msg_t *msg)
1831 lnet_hdr_t *hdr = &msg->msg_hdr;
1832 lnet_process_id_t src = {0};
1835 src.nid = hdr->src_nid;
1836 src.pid = hdr->src_pid;
1838 /* Convert ack fields to host byte order */
1839 hdr->msg.ack.match_bits = le64_to_cpu(hdr->msg.ack.match_bits);
1840 hdr->msg.ack.mlength = le32_to_cpu(hdr->msg.ack.mlength);
1844 /* NB handles only looked up by creator (no flips) */
1845 md = lnet_wire_handle2md(&hdr->msg.ack.dst_wmd);
1846 if (md == NULL || md->md_threshold == 0 || md->md_me != NULL) {
1847 /* Don't moan; this is expected */
1849 "%s: Dropping ACK from %s to %s MD "LPX64"."LPX64"\n",
1850 libcfs_nid2str(ni->ni_nid), libcfs_id2str(src),
1851 (md == NULL) ? "invalid" : "inactive",
1852 hdr->msg.ack.dst_wmd.wh_interface_cookie,
1853 hdr->msg.ack.dst_wmd.wh_object_cookie);
1854 if (md != NULL && md->md_me != NULL)
1855 CERROR("Source MD also attached to portal %d\n",
1856 md->md_me->me_portal);
1859 return ENOENT; /* +ve! */
1862 CDEBUG(D_NET, "%s: ACK from %s into md "LPX64"\n",
1863 libcfs_nid2str(ni->ni_nid), libcfs_id2str(src),
1864 hdr->msg.ack.dst_wmd.wh_object_cookie);
1866 lnet_commit_md(md, msg);
1868 msg->msg_ev.type = LNET_EVENT_ACK;
1869 msg->msg_ev.target.pid = hdr->dest_pid;
1870 msg->msg_ev.target.nid = hdr->dest_nid;
1871 msg->msg_ev.initiator = src;
1872 msg->msg_ev.mlength = hdr->msg.ack.mlength;
1873 msg->msg_ev.match_bits = hdr->msg.ack.match_bits;
1875 lnet_md_deconstruct(md, &msg->msg_ev.md);
1876 lnet_md2handle(&msg->msg_ev.md_handle, md);
1878 the_lnet.ln_counters.recv_count++;
1882 lnet_ni_recv(ni, msg->msg_private, msg, 0, 0, 0, msg->msg_len);
1887 lnet_msgtyp2str (int type)
1896 case LNET_MSG_REPLY:
1898 case LNET_MSG_HELLO:
1901 return ("<UNKNOWN>");
1906 lnet_print_hdr(lnet_hdr_t * hdr)
1908 lnet_process_id_t src = {0};
1909 lnet_process_id_t dst = {0};
1910 char *type_str = lnet_msgtyp2str (hdr->type);
1912 src.nid = hdr->src_nid;
1913 src.pid = hdr->src_pid;
1915 dst.nid = hdr->dest_nid;
1916 dst.pid = hdr->dest_pid;
1918 CWARN("P3 Header at %p of type %s\n", hdr, type_str);
1919 CWARN(" From %s\n", libcfs_id2str(src));
1920 CWARN(" To %s\n", libcfs_id2str(dst));
1922 switch (hdr->type) {
1927 CWARN(" Ptl index %d, ack md "LPX64"."LPX64", "
1928 "match bits "LPU64"\n",
1929 hdr->msg.put.ptl_index,
1930 hdr->msg.put.ack_wmd.wh_interface_cookie,
1931 hdr->msg.put.ack_wmd.wh_object_cookie,
1932 hdr->msg.put.match_bits);
1933 CWARN(" Length %d, offset %d, hdr data "LPX64"\n",
1934 hdr->payload_length, hdr->msg.put.offset,
1935 hdr->msg.put.hdr_data);
1939 CWARN(" Ptl index %d, return md "LPX64"."LPX64", "
1940 "match bits "LPU64"\n", hdr->msg.get.ptl_index,
1941 hdr->msg.get.return_wmd.wh_interface_cookie,
1942 hdr->msg.get.return_wmd.wh_object_cookie,
1943 hdr->msg.get.match_bits);
1944 CWARN(" Length %d, src offset %d\n",
1945 hdr->msg.get.sink_length,
1946 hdr->msg.get.src_offset);
1950 CWARN(" dst md "LPX64"."LPX64", "
1951 "manipulated length %d\n",
1952 hdr->msg.ack.dst_wmd.wh_interface_cookie,
1953 hdr->msg.ack.dst_wmd.wh_object_cookie,
1954 hdr->msg.ack.mlength);
1957 case LNET_MSG_REPLY:
1958 CWARN(" dst md "LPX64"."LPX64", "
1960 hdr->msg.reply.dst_wmd.wh_interface_cookie,
1961 hdr->msg.reply.dst_wmd.wh_object_cookie,
1962 hdr->payload_length);
1969 lnet_parse(lnet_ni_t *ni, lnet_hdr_t *hdr, lnet_nid_t from_nid,
1970 void *private, int rdma_req)
1975 lnet_nid_t dest_nid;
1977 __u32 payload_length;
1980 LASSERT (!in_interrupt ());
1982 type = le32_to_cpu(hdr->type);
1983 src_nid = le64_to_cpu(hdr->src_nid);
1984 dest_nid = le64_to_cpu(hdr->dest_nid);
1985 payload_length = le32_to_cpu(hdr->payload_length);
1987 for_me = (ni->ni_nid == dest_nid);
1992 if (payload_length > 0) {
1993 CERROR("%s, src %s: bad %s payload %d (0 expected)\n",
1994 libcfs_nid2str(from_nid),
1995 libcfs_nid2str(src_nid),
1996 lnet_msgtyp2str(type), payload_length);
2002 case LNET_MSG_REPLY:
2003 if (payload_length > (__u32)(for_me ? LNET_MAX_PAYLOAD : LNET_MTU)) {
2004 CERROR("%s, src %s: bad %s payload %d "
2005 "(%d max expected)\n",
2006 libcfs_nid2str(from_nid),
2007 libcfs_nid2str(src_nid),
2008 lnet_msgtyp2str(type),
2010 for_me ? LNET_MAX_PAYLOAD : LNET_MTU);
2016 CERROR("%s, src %s: Bad message type 0x%x\n",
2017 libcfs_nid2str(from_nid),
2018 libcfs_nid2str(src_nid), type);
2022 /* Regard a bad destination NID as a protocol error. Senders should
2023 * know what they're doing; if they don't they're misconfigured, buggy
2024 * or malicious so we chop them off at the knees :) */
2027 if (LNET_NIDNET(dest_nid) == LNET_NIDNET(ni->ni_nid)) {
2028 /* should have gone direct */
2029 CERROR ("%s, src %s: Bad dest nid %s "
2030 "(should have been sent direct)\n",
2031 libcfs_nid2str(from_nid),
2032 libcfs_nid2str(src_nid),
2033 libcfs_nid2str(dest_nid));
2037 if (lnet_islocalnid(dest_nid)) {
2038 /* dest is another local NI; sender should have used
2039 * this node's NID on its own network */
2040 CERROR ("%s, src %s: Bad dest nid %s "
2041 "(it's my nid but on a different network)\n",
2042 libcfs_nid2str(from_nid),
2043 libcfs_nid2str(src_nid),
2044 libcfs_nid2str(dest_nid));
2048 if (rdma_req && type == LNET_MSG_GET) {
2049 CERROR ("%s, src %s: Bad optimized GET for %s "
2050 "(final destination must be me)\n",
2051 libcfs_nid2str(from_nid),
2052 libcfs_nid2str(src_nid),
2053 libcfs_nid2str(dest_nid));
2057 if (!the_lnet.ln_routing) {
2058 CERROR ("%s, src %s: Dropping message for %s "
2059 "(routing not enabled)\n",
2060 libcfs_nid2str(from_nid),
2061 libcfs_nid2str(src_nid),
2062 libcfs_nid2str(dest_nid));
2067 /* Message looks OK; we're not going to return an error, so we MUST
2068 * call back lnd_recv() come what may... */
2070 if (!list_empty (&the_lnet.ln_test_peers) && /* normally we don't */
2071 fail_peer (src_nid, 0)) /* shall we now? */
2073 CERROR("%s, src %s: Dropping %s to simulate failure\n",
2074 libcfs_nid2str(from_nid), libcfs_nid2str(src_nid),
2075 lnet_msgtyp2str(type));
2079 msg = lnet_msg_alloc();
2081 CERROR("%s, src %s: Dropping %s (out of memory)\n",
2082 libcfs_nid2str(from_nid), libcfs_nid2str(src_nid),
2083 lnet_msgtyp2str(type));
2087 /* msg zeroed in lnet_msg_alloc; i.e. flags all clear, pointers NULL etc */
2089 msg->msg_type = type;
2090 msg->msg_private = private;
2091 msg->msg_receiving = 1;
2092 msg->msg_len = msg->msg_wanted = payload_length;
2093 msg->msg_offset = 0;
2094 msg->msg_hdr = *hdr;
2097 rc = lnet_nid2peer_locked(&msg->msg_rxpeer, from_nid);
2100 CERROR("%s, src %s: Dropping %s "
2101 "(error %d looking up sender)\n",
2102 libcfs_nid2str(from_nid), libcfs_nid2str(src_nid),
2103 lnet_msgtyp2str(type), rc);
2112 msg->msg_target.pid = le32_to_cpu(hdr->dest_pid);
2113 msg->msg_target.nid = dest_nid;
2114 msg->msg_routing = 1;
2115 msg->msg_offset = 0;
2118 if (msg->msg_rxpeer->lp_rtrcredits <= 0 ||
2119 lnet_msg2bufpool(msg)->rbp_credits <= 0) {
2120 rc = lnet_eager_recv_locked(msg);
2127 lnet_commit_routedmsg(msg);
2128 rc = lnet_post_routed_recv_locked(msg, 0);
2132 lnet_ni_recv(ni, msg->msg_private, msg, 0,
2133 0, payload_length, payload_length);
2137 /* convert common msg->hdr fields to host byteorder */
2138 msg->msg_hdr.type = type;
2139 msg->msg_hdr.src_nid = src_nid;
2140 msg->msg_hdr.src_pid = le32_to_cpu(msg->msg_hdr.src_pid);
2141 msg->msg_hdr.dest_nid = dest_nid;
2142 msg->msg_hdr.dest_pid = le32_to_cpu(msg->msg_hdr.dest_pid);
2143 msg->msg_hdr.payload_length = payload_length;
2145 msg->msg_ev.sender = from_nid;
2149 rc = lnet_parse_ack(ni, msg);
2152 rc = lnet_parse_put(ni, msg);
2155 rc = lnet_parse_get(ni, msg, rdma_req);
2157 case LNET_MSG_REPLY:
2158 rc = lnet_parse_reply(ni, msg);
2162 goto free_drop; /* prevent an unused label if !kernel */
2168 LASSERT (rc == ENOENT);
2171 LASSERT (msg->msg_md == NULL);
2173 if (msg->msg_rxpeer != NULL) {
2174 lnet_peer_decref_locked(msg->msg_rxpeer);
2175 msg->msg_rxpeer = NULL;
2177 lnet_msg_free(msg); /* expects LNET_LOCK held */
2181 lnet_drop_message(ni, private, payload_length);
2186 LNetPut(lnet_nid_t self, lnet_handle_md_t mdh, lnet_ack_req_t ack,
2187 lnet_process_id_t target, unsigned int portal,
2188 __u64 match_bits, unsigned int offset,
2195 LASSERT (the_lnet.ln_init);
2196 LASSERT (the_lnet.ln_refcount > 0);
2198 if (!list_empty (&the_lnet.ln_test_peers) && /* normally we don't */
2199 fail_peer (target.nid, 1)) /* shall we now? */
2201 CERROR("Dropping PUT to %s: simulated failure\n",
2202 libcfs_id2str(target));
2206 msg = lnet_msg_alloc();
2208 CERROR("Dropping PUT to %s: ENOMEM on lnet_msg_t\n",
2209 libcfs_id2str(target));
2215 md = lnet_handle2md(&mdh);
2216 if (md == NULL || md->md_threshold == 0 || md->md_me != NULL) {
2219 CERROR("Dropping PUT ("LPU64":%d:%s): MD (%d) invalid\n",
2220 match_bits, portal, libcfs_id2str(target),
2221 md == NULL ? -1 : md->md_threshold);
2222 if (md != NULL && md->md_me != NULL)
2223 CERROR("Source MD also attached to portal %d\n",
2224 md->md_me->me_portal);
2230 CDEBUG(D_NET, "LNetPut -> %s\n", libcfs_id2str(target));
2232 lnet_commit_md(md, msg);
2234 lnet_prep_send(msg, LNET_MSG_PUT, target, 0, md->md_length);
2236 msg->msg_hdr.msg.put.match_bits = cpu_to_le64(match_bits);
2237 msg->msg_hdr.msg.put.ptl_index = cpu_to_le32(portal);
2238 msg->msg_hdr.msg.put.offset = cpu_to_le32(offset);
2239 msg->msg_hdr.msg.put.hdr_data = hdr_data;
2241 /* NB handles only looked up by creator (no flips) */
2242 if (ack == LNET_ACK_REQ) {
2243 msg->msg_hdr.msg.put.ack_wmd.wh_interface_cookie =
2244 the_lnet.ln_interface_cookie;
2245 msg->msg_hdr.msg.put.ack_wmd.wh_object_cookie =
2246 md->md_lh.lh_cookie;
2248 msg->msg_hdr.msg.put.ack_wmd.wh_interface_cookie =
2249 LNET_WIRE_HANDLE_COOKIE_NONE;
2250 msg->msg_hdr.msg.put.ack_wmd.wh_object_cookie =
2251 LNET_WIRE_HANDLE_COOKIE_NONE;
2254 msg->msg_ev.type = LNET_EVENT_SEND;
2255 msg->msg_ev.initiator.nid = LNET_NID_ANY;
2256 msg->msg_ev.initiator.pid = the_lnet.ln_pid;
2257 msg->msg_ev.target = target;
2258 msg->msg_ev.sender = LNET_NID_ANY;
2259 msg->msg_ev.pt_index = portal;
2260 msg->msg_ev.match_bits = match_bits;
2261 msg->msg_ev.rlength = md->md_length;
2262 msg->msg_ev.mlength = md->md_length;
2263 msg->msg_ev.offset = offset;
2264 msg->msg_ev.hdr_data = hdr_data;
2266 lnet_md_deconstruct(md, &msg->msg_ev.md);
2267 lnet_md2handle(&msg->msg_ev.md_handle, md);
2269 the_lnet.ln_counters.send_count++;
2270 the_lnet.ln_counters.send_length += md->md_length;
2274 rc = lnet_send(self, msg);
2276 CERROR("Error sending PUT to %s: %d\n",
2277 libcfs_id2str(target), rc);
2278 lnet_finalize (NULL, msg, rc);
2281 /* completion will be signalled by an event */
2286 lnet_create_reply_msg (lnet_ni_t *ni, lnet_msg_t *getmsg)
2288 /* The LND can DMA direct to the GET md (i.e. no REPLY msg). This
2289 * returns a msg for the LND to pass to lnet_finalize() when the sink
2290 * data has been received.
2292 * CAVEAT EMPTOR: 'getmsg' is the original GET, which is freed when
2293 * lnet_finalize() is called on it, so the LND must call this first */
2295 lnet_msg_t *msg = lnet_msg_alloc();
2296 lnet_libmd_t *getmd = getmsg->msg_md;
2297 lnet_process_id_t peer_id = getmsg->msg_target;
2299 LASSERT (!getmsg->msg_target_is_router);
2300 LASSERT (!getmsg->msg_routing);
2304 LASSERT (getmd->md_refcount > 0);
2307 CERROR ("%s: Dropping REPLY from %s: can't allocate msg\n",
2308 libcfs_nid2str(ni->ni_nid), libcfs_id2str(peer_id));
2312 if (getmd->md_threshold == 0) {
2313 CERROR ("%s: Dropping REPLY from %s for inactive MD %p\n",
2314 libcfs_nid2str(ni->ni_nid), libcfs_id2str(peer_id),
2319 LASSERT (getmd->md_offset == 0);
2321 CDEBUG(D_NET, "%s: Reply from %s md %p\n",
2322 libcfs_nid2str(ni->ni_nid), libcfs_id2str(peer_id), getmd);
2324 lnet_commit_md (getmd, msg);
2326 msg->msg_type = LNET_MSG_GET; /* flag this msg as an "optimized" GET */
2328 msg->msg_ev.type = LNET_EVENT_REPLY;
2329 msg->msg_ev.initiator = peer_id;
2330 msg->msg_ev.sender = peer_id.nid; /* optimized GETs can't be routed */
2331 msg->msg_ev.rlength = msg->msg_ev.mlength = getmd->md_length;
2332 msg->msg_ev.offset = 0;
2334 lnet_md_deconstruct(getmd, &msg->msg_ev.md);
2335 lnet_md2handle(&msg->msg_ev.md_handle, getmd);
2337 the_lnet.ln_counters.recv_count++;
2338 the_lnet.ln_counters.recv_length += getmd->md_length;
2347 the_lnet.ln_counters.drop_count++;
2348 the_lnet.ln_counters.drop_length += getmd->md_length;
2356 lnet_set_reply_msg_len(lnet_ni_t *ni, lnet_msg_t *reply, unsigned int len)
2358 /* Set the REPLY length, now the RDMA that elides the REPLY message has
2359 * completed and I know it. */
2360 LASSERT (reply != NULL);
2361 LASSERT (reply->msg_type == LNET_MSG_GET);
2362 LASSERT (reply->msg_ev.type == LNET_EVENT_REPLY);
2364 /* NB I trusted my peer to RDMA. If she tells me she's written beyond
2365 * the end of my buffer, I might as well be dead. */
2366 LASSERT (len <= reply->msg_ev.mlength);
2368 reply->msg_ev.mlength = len;
2372 LNetGet(lnet_nid_t self, lnet_handle_md_t mdh,
2373 lnet_process_id_t target, unsigned int portal,
2374 __u64 match_bits, unsigned int offset)
2380 LASSERT (the_lnet.ln_init);
2381 LASSERT (the_lnet.ln_refcount > 0);
2383 if (!list_empty (&the_lnet.ln_test_peers) && /* normally we don't */
2384 fail_peer (target.nid, 1)) /* shall we now? */
2386 CERROR("Dropping GET to %s: simulated failure\n",
2387 libcfs_id2str(target));
2391 msg = lnet_msg_alloc();
2393 CERROR("Dropping GET to %s: ENOMEM on lnet_msg_t\n",
2394 libcfs_id2str(target));
2400 md = lnet_handle2md(&mdh);
2401 if (md == NULL || md->md_threshold == 0 || md->md_me != NULL) {
2404 CERROR("Dropping GET ("LPU64":%d:%s): MD (%d) invalid\n",
2405 match_bits, portal, libcfs_id2str(target),
2406 md == NULL ? -1 : md->md_threshold);
2407 if (md != NULL && md->md_me != NULL)
2408 CERROR("REPLY MD also attached to portal %d\n",
2409 md->md_me->me_portal);
2415 CDEBUG(D_NET, "LNetGet -> %s\n", libcfs_id2str(target));
2417 lnet_commit_md(md, msg);
2419 lnet_prep_send(msg, LNET_MSG_GET, target, 0, 0);
2421 msg->msg_hdr.msg.get.match_bits = cpu_to_le64(match_bits);
2422 msg->msg_hdr.msg.get.ptl_index = cpu_to_le32(portal);
2423 msg->msg_hdr.msg.get.src_offset = cpu_to_le32(offset);
2424 msg->msg_hdr.msg.get.sink_length = cpu_to_le32(md->md_length);
2426 /* NB handles only looked up by creator (no flips) */
2427 msg->msg_hdr.msg.get.return_wmd.wh_interface_cookie =
2428 the_lnet.ln_interface_cookie;
2429 msg->msg_hdr.msg.get.return_wmd.wh_object_cookie =
2430 md->md_lh.lh_cookie;
2432 msg->msg_ev.type = LNET_EVENT_SEND;
2433 msg->msg_ev.initiator.nid = LNET_NID_ANY;
2434 msg->msg_ev.initiator.pid = the_lnet.ln_pid;
2435 msg->msg_ev.target = target;
2436 msg->msg_ev.sender = LNET_NID_ANY;
2437 msg->msg_ev.pt_index = portal;
2438 msg->msg_ev.match_bits = match_bits;
2439 msg->msg_ev.rlength = md->md_length;
2440 msg->msg_ev.mlength = md->md_length;
2441 msg->msg_ev.offset = offset;
2442 msg->msg_ev.hdr_data = 0;
2444 lnet_md_deconstruct(md, &msg->msg_ev.md);
2445 lnet_md2handle(&msg->msg_ev.md_handle, md);
2447 the_lnet.ln_counters.send_count++;
2451 rc = lnet_send(self, msg);
2453 CERROR("error sending GET to %s: %d\n",
2454 libcfs_id2str(target), rc);
2455 lnet_finalize (NULL, msg, rc);
2458 /* completion will be signalled by an event */
2463 LNetDist (lnet_nid_t dstnid, lnet_nid_t *srcnidp, __u32 *orderp)
2465 struct list_head *e;
2467 lnet_route_t *route;
2468 lnet_remotenet_t *rnet;
2469 __u32 dstnet = LNET_NIDNET(dstnid);
2473 /* if !local_nid_dist_zero, I don't return a distance of 0 ever
2474 * (when lustre sees a distance of 0, it substitutes 0@lo), so I
2475 * keep order 0 free for 0@lo and order 1 free for a local NID
2478 LASSERT (the_lnet.ln_init);
2479 LASSERT (the_lnet.ln_refcount > 0);
2483 list_for_each (e, &the_lnet.ln_nis) {
2484 ni = list_entry(e, lnet_ni_t, ni_list);
2486 if (ni->ni_nid == dstnid) {
2487 if (srcnidp != NULL)
2489 if (orderp != NULL) {
2490 if (LNET_NETTYP(LNET_NIDNET(dstnid)) == LOLND)
2497 return local_nid_dist_zero ? 0 : 1;
2500 if (LNET_NIDNET(ni->ni_nid) == dstnet) {
2501 if (srcnidp != NULL)
2502 *srcnidp = ni->ni_nid;
2512 list_for_each (e, &the_lnet.ln_remote_nets) {
2513 rnet = list_entry(e, lnet_remotenet_t, lrn_list);
2515 if (rnet->lrn_net == dstnet) {
2516 LASSERT (!list_empty(&rnet->lrn_routes));
2517 route = list_entry(rnet->lrn_routes.next,
2518 lnet_route_t, lr_list);
2519 hops = rnet->lrn_hops;
2520 if (srcnidp != NULL)
2521 *srcnidp = route->lr_gateway->lp_ni->ni_nid;
2531 return -EHOSTUNREACH;
2535 LNetSetAsync(lnet_process_id_t id, int nasync)
2541 lnet_remotenet_t *rnet;
2542 struct list_head *tmp;
2543 lnet_route_t *route;
2550 /* Target on a local network? */
2552 ni = lnet_net2ni(LNET_NIDNET(id.nid));
2554 if (ni->ni_lnd->lnd_setasync != NULL)
2555 rc = (ni->ni_lnd->lnd_setasync)(ni, id, nasync);
2560 /* Target on a remote network: apply to routers */
2562 LIBCFS_ALLOC(nids, maxnids * sizeof(*nids));
2567 /* Snapshot all the router NIDs */
2569 rnet = lnet_find_net_locked(LNET_NIDNET(id.nid));
2571 list_for_each(tmp, &rnet->lrn_routes) {
2572 if (nnids == maxnids) {
2574 LIBCFS_FREE(nids, maxnids * sizeof(*nids));
2579 route = list_entry(tmp, lnet_route_t, lr_list);
2580 nids[nnids++] = route->lr_gateway->lp_nid;
2585 /* set async on all the routers */
2586 while (nnids-- > 0) {
2587 id.pid = LUSTRE_SRV_LNET_PID;
2588 id.nid = nids[nnids];
2590 ni = lnet_net2ni(LNET_NIDNET(id.nid));
2594 if (ni->ni_lnd->lnd_setasync != NULL) {
2595 rc2 = (ni->ni_lnd->lnd_setasync)(ni, id, nasync);
2602 LIBCFS_FREE(nids, maxnids * sizeof(*nids));