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.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2012, 2015, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lnet/klnds/o2iblnd/o2iblnd_cb.c
38 * Author: Eric Barton <eric@bartonsoftware.com>
43 static void kiblnd_peer_alive(kib_peer_t *peer);
44 static void kiblnd_peer_connect_failed(kib_peer_t *peer, int active, int error);
45 static void kiblnd_check_sends(kib_conn_t *conn);
46 static void kiblnd_init_tx_msg(lnet_ni_t *ni, kib_tx_t *tx,
47 int type, int body_nob);
48 static int kiblnd_init_rdma(kib_conn_t *conn, kib_tx_t *tx, int type,
49 int resid, kib_rdma_desc_t *dstrd, __u64 dstcookie);
50 static void kiblnd_queue_tx_locked(kib_tx_t *tx, kib_conn_t *conn);
51 static void kiblnd_queue_tx(kib_tx_t *tx, kib_conn_t *conn);
52 static void kiblnd_unmap_tx(lnet_ni_t *ni, kib_tx_t *tx);
55 kiblnd_tx_done (lnet_ni_t *ni, kib_tx_t *tx)
57 lnet_msg_t *lntmsg[2];
58 kib_net_t *net = ni->ni_data;
62 LASSERT (net != NULL);
63 LASSERT (!in_interrupt());
64 LASSERT (!tx->tx_queued); /* mustn't be queued for sending */
65 LASSERT (tx->tx_sending == 0); /* mustn't be awaiting sent callback */
66 LASSERT (!tx->tx_waiting); /* mustn't be awaiting peer response */
67 LASSERT (tx->tx_pool != NULL);
69 kiblnd_unmap_tx(ni, tx);
71 /* tx may have up to 2 lnet msgs to finalise */
72 lntmsg[0] = tx->tx_lntmsg[0]; tx->tx_lntmsg[0] = NULL;
73 lntmsg[1] = tx->tx_lntmsg[1]; tx->tx_lntmsg[1] = NULL;
76 if (tx->tx_conn != NULL) {
77 LASSERT (ni == tx->tx_conn->ibc_peer->ibp_ni);
79 kiblnd_conn_decref(tx->tx_conn);
86 kiblnd_pool_free_node(&tx->tx_pool->tpo_pool, &tx->tx_list);
88 /* delay finalize until my descs have been freed */
89 for (i = 0; i < 2; i++) {
90 if (lntmsg[i] == NULL)
93 lnet_finalize(ni, lntmsg[i], rc);
98 kiblnd_txlist_done(lnet_ni_t *ni, struct list_head *txlist, int status)
102 while (!list_empty(txlist)) {
103 tx = list_entry(txlist->next, kib_tx_t, tx_list);
105 list_del(&tx->tx_list);
108 tx->tx_status = status;
109 kiblnd_tx_done(ni, tx);
114 kiblnd_get_idle_tx(lnet_ni_t *ni, lnet_nid_t target)
116 kib_net_t *net = (kib_net_t *)ni->ni_data;
117 struct list_head *node;
119 kib_tx_poolset_t *tps;
121 tps = net->ibn_tx_ps[lnet_cpt_of_nid(target)];
122 node = kiblnd_pool_alloc_node(&tps->tps_poolset);
125 tx = container_of(node, kib_tx_t, tx_list);
127 LASSERT (tx->tx_nwrq == 0);
128 LASSERT (!tx->tx_queued);
129 LASSERT (tx->tx_sending == 0);
130 LASSERT (!tx->tx_waiting);
131 LASSERT (tx->tx_status == 0);
132 LASSERT (tx->tx_conn == NULL);
133 LASSERT (tx->tx_lntmsg[0] == NULL);
134 LASSERT (tx->tx_lntmsg[1] == NULL);
135 LASSERT (tx->tx_nfrags == 0);
141 kiblnd_drop_rx(kib_rx_t *rx)
143 kib_conn_t *conn = rx->rx_conn;
144 struct kib_sched_info *sched = conn->ibc_sched;
147 spin_lock_irqsave(&sched->ibs_lock, flags);
148 LASSERT(conn->ibc_nrx > 0);
150 spin_unlock_irqrestore(&sched->ibs_lock, flags);
152 kiblnd_conn_decref(conn);
156 kiblnd_post_rx (kib_rx_t *rx, int credit)
158 kib_conn_t *conn = rx->rx_conn;
159 kib_net_t *net = conn->ibc_peer->ibp_ni->ni_data;
160 struct ib_recv_wr *bad_wrq = NULL;
161 struct ib_mr *mr = conn->ibc_hdev->ibh_mrs;
164 LASSERT (net != NULL);
165 LASSERT (!in_interrupt());
166 LASSERT (credit == IBLND_POSTRX_NO_CREDIT ||
167 credit == IBLND_POSTRX_PEER_CREDIT ||
168 credit == IBLND_POSTRX_RSRVD_CREDIT);
171 rx->rx_sge.lkey = mr->lkey;
172 rx->rx_sge.addr = rx->rx_msgaddr;
173 rx->rx_sge.length = IBLND_MSG_SIZE;
175 rx->rx_wrq.next = NULL;
176 rx->rx_wrq.sg_list = &rx->rx_sge;
177 rx->rx_wrq.num_sge = 1;
178 rx->rx_wrq.wr_id = kiblnd_ptr2wreqid(rx, IBLND_WID_RX);
180 LASSERT (conn->ibc_state >= IBLND_CONN_INIT);
181 LASSERT (rx->rx_nob >= 0); /* not posted */
183 if (conn->ibc_state > IBLND_CONN_ESTABLISHED) {
184 kiblnd_drop_rx(rx); /* No more posts for this rx */
188 rx->rx_nob = -1; /* flag posted */
190 /* NB: need an extra reference after ib_post_recv because we don't
191 * own this rx (and rx::rx_conn) anymore, LU-5678.
193 kiblnd_conn_addref(conn);
194 rc = ib_post_recv(conn->ibc_cmid->qp, &rx->rx_wrq, &bad_wrq);
195 if (unlikely(rc != 0)) {
196 CERROR("Can't post rx for %s: %d, bad_wrq: %p\n",
197 libcfs_nid2str(conn->ibc_peer->ibp_nid), rc, bad_wrq);
201 if (conn->ibc_state < IBLND_CONN_ESTABLISHED) /* Initial post */
204 if (unlikely(rc != 0)) {
205 kiblnd_close_conn(conn, rc);
206 kiblnd_drop_rx(rx); /* No more posts for this rx */
210 if (credit == IBLND_POSTRX_NO_CREDIT)
213 spin_lock(&conn->ibc_lock);
214 if (credit == IBLND_POSTRX_PEER_CREDIT)
215 conn->ibc_outstanding_credits++;
217 conn->ibc_reserved_credits++;
218 spin_unlock(&conn->ibc_lock);
220 kiblnd_check_sends(conn);
222 kiblnd_conn_decref(conn);
227 kiblnd_find_waiting_tx_locked(kib_conn_t *conn, int txtype, __u64 cookie)
229 struct list_head *tmp;
231 list_for_each(tmp, &conn->ibc_active_txs) {
232 kib_tx_t *tx = list_entry(tmp, kib_tx_t, tx_list);
234 LASSERT(!tx->tx_queued);
235 LASSERT(tx->tx_sending != 0 || tx->tx_waiting);
237 if (tx->tx_cookie != cookie)
240 if (tx->tx_waiting &&
241 tx->tx_msg->ibm_type == txtype)
244 CWARN("Bad completion: %swaiting, type %x (wanted %x)\n",
245 tx->tx_waiting ? "" : "NOT ",
246 tx->tx_msg->ibm_type, txtype);
252 kiblnd_handle_completion(kib_conn_t *conn, int txtype, int status, __u64 cookie)
255 lnet_ni_t *ni = conn->ibc_peer->ibp_ni;
258 spin_lock(&conn->ibc_lock);
260 tx = kiblnd_find_waiting_tx_locked(conn, txtype, cookie);
262 spin_unlock(&conn->ibc_lock);
264 CWARN("Unmatched completion type %x cookie "LPX64" from %s\n",
265 txtype, cookie, libcfs_nid2str(conn->ibc_peer->ibp_nid));
266 kiblnd_close_conn(conn, -EPROTO);
270 if (tx->tx_status == 0) { /* success so far */
271 if (status < 0) { /* failed? */
272 tx->tx_status = status;
273 } else if (txtype == IBLND_MSG_GET_REQ) {
274 lnet_set_reply_msg_len(ni, tx->tx_lntmsg[1], status);
280 idle = !tx->tx_queued && (tx->tx_sending == 0);
282 list_del(&tx->tx_list);
284 spin_unlock(&conn->ibc_lock);
287 kiblnd_tx_done(ni, tx);
291 kiblnd_send_completion(kib_conn_t *conn, int type, int status, __u64 cookie)
293 lnet_ni_t *ni = conn->ibc_peer->ibp_ni;
294 kib_tx_t *tx = kiblnd_get_idle_tx(ni, conn->ibc_peer->ibp_nid);
297 CERROR("Can't get tx for completion %x for %s\n",
298 type, libcfs_nid2str(conn->ibc_peer->ibp_nid));
302 tx->tx_msg->ibm_u.completion.ibcm_status = status;
303 tx->tx_msg->ibm_u.completion.ibcm_cookie = cookie;
304 kiblnd_init_tx_msg(ni, tx, type, sizeof(kib_completion_msg_t));
306 kiblnd_queue_tx(tx, conn);
310 kiblnd_handle_rx (kib_rx_t *rx)
312 kib_msg_t *msg = rx->rx_msg;
313 kib_conn_t *conn = rx->rx_conn;
314 lnet_ni_t *ni = conn->ibc_peer->ibp_ni;
315 int credits = msg->ibm_credits;
321 LASSERT (conn->ibc_state >= IBLND_CONN_ESTABLISHED);
323 CDEBUG (D_NET, "Received %x[%d] from %s\n",
324 msg->ibm_type, credits,
325 libcfs_nid2str(conn->ibc_peer->ibp_nid));
328 /* Have I received credits that will let me send? */
329 spin_lock(&conn->ibc_lock);
331 if (conn->ibc_credits + credits >
332 conn->ibc_queue_depth) {
333 rc2 = conn->ibc_credits;
334 spin_unlock(&conn->ibc_lock);
336 CERROR("Bad credits from %s: %d + %d > %d\n",
337 libcfs_nid2str(conn->ibc_peer->ibp_nid),
339 conn->ibc_queue_depth);
341 kiblnd_close_conn(conn, -EPROTO);
342 kiblnd_post_rx(rx, IBLND_POSTRX_NO_CREDIT);
346 conn->ibc_credits += credits;
348 /* This ensures the credit taken by NOOP can be returned */
349 if (msg->ibm_type == IBLND_MSG_NOOP &&
350 !IBLND_OOB_CAPABLE(conn->ibc_version)) /* v1 only */
351 conn->ibc_outstanding_credits++;
353 spin_unlock(&conn->ibc_lock);
354 kiblnd_check_sends(conn);
357 switch (msg->ibm_type) {
359 CERROR("Bad IBLND message type %x from %s\n",
360 msg->ibm_type, libcfs_nid2str(conn->ibc_peer->ibp_nid));
361 post_credit = IBLND_POSTRX_NO_CREDIT;
366 if (IBLND_OOB_CAPABLE(conn->ibc_version)) {
367 post_credit = IBLND_POSTRX_NO_CREDIT;
371 if (credits != 0) /* credit already posted */
372 post_credit = IBLND_POSTRX_NO_CREDIT;
373 else /* a keepalive NOOP */
374 post_credit = IBLND_POSTRX_PEER_CREDIT;
377 case IBLND_MSG_IMMEDIATE:
378 post_credit = IBLND_POSTRX_DONT_POST;
379 rc = lnet_parse(ni, &msg->ibm_u.immediate.ibim_hdr,
380 msg->ibm_srcnid, rx, 0);
381 if (rc < 0) /* repost on error */
382 post_credit = IBLND_POSTRX_PEER_CREDIT;
385 case IBLND_MSG_PUT_REQ:
386 post_credit = IBLND_POSTRX_DONT_POST;
387 rc = lnet_parse(ni, &msg->ibm_u.putreq.ibprm_hdr,
388 msg->ibm_srcnid, rx, 1);
389 if (rc < 0) /* repost on error */
390 post_credit = IBLND_POSTRX_PEER_CREDIT;
393 case IBLND_MSG_PUT_NAK:
394 CWARN ("PUT_NACK from %s\n",
395 libcfs_nid2str(conn->ibc_peer->ibp_nid));
396 post_credit = IBLND_POSTRX_RSRVD_CREDIT;
397 kiblnd_handle_completion(conn, IBLND_MSG_PUT_REQ,
398 msg->ibm_u.completion.ibcm_status,
399 msg->ibm_u.completion.ibcm_cookie);
402 case IBLND_MSG_PUT_ACK:
403 post_credit = IBLND_POSTRX_RSRVD_CREDIT;
405 spin_lock(&conn->ibc_lock);
406 tx = kiblnd_find_waiting_tx_locked(conn, IBLND_MSG_PUT_REQ,
407 msg->ibm_u.putack.ibpam_src_cookie);
409 list_del(&tx->tx_list);
410 spin_unlock(&conn->ibc_lock);
413 CERROR("Unmatched PUT_ACK from %s\n",
414 libcfs_nid2str(conn->ibc_peer->ibp_nid));
419 LASSERT (tx->tx_waiting);
420 /* CAVEAT EMPTOR: I could be racing with tx_complete, but...
421 * (a) I can overwrite tx_msg since my peer has received it!
422 * (b) tx_waiting set tells tx_complete() it's not done. */
424 tx->tx_nwrq = 0; /* overwrite PUT_REQ */
426 rc2 = kiblnd_init_rdma(conn, tx, IBLND_MSG_PUT_DONE,
427 kiblnd_rd_size(&msg->ibm_u.putack.ibpam_rd),
428 &msg->ibm_u.putack.ibpam_rd,
429 msg->ibm_u.putack.ibpam_dst_cookie);
431 CERROR("Can't setup rdma for PUT to %s: %d\n",
432 libcfs_nid2str(conn->ibc_peer->ibp_nid), rc2);
434 spin_lock(&conn->ibc_lock);
435 tx->tx_waiting = 0; /* clear waiting and queue atomically */
436 kiblnd_queue_tx_locked(tx, conn);
437 spin_unlock(&conn->ibc_lock);
440 case IBLND_MSG_PUT_DONE:
441 post_credit = IBLND_POSTRX_PEER_CREDIT;
442 kiblnd_handle_completion(conn, IBLND_MSG_PUT_ACK,
443 msg->ibm_u.completion.ibcm_status,
444 msg->ibm_u.completion.ibcm_cookie);
447 case IBLND_MSG_GET_REQ:
448 post_credit = IBLND_POSTRX_DONT_POST;
449 rc = lnet_parse(ni, &msg->ibm_u.get.ibgm_hdr,
450 msg->ibm_srcnid, rx, 1);
451 if (rc < 0) /* repost on error */
452 post_credit = IBLND_POSTRX_PEER_CREDIT;
455 case IBLND_MSG_GET_DONE:
456 post_credit = IBLND_POSTRX_RSRVD_CREDIT;
457 kiblnd_handle_completion(conn, IBLND_MSG_GET_REQ,
458 msg->ibm_u.completion.ibcm_status,
459 msg->ibm_u.completion.ibcm_cookie);
463 if (rc < 0) /* protocol error */
464 kiblnd_close_conn(conn, rc);
466 if (post_credit != IBLND_POSTRX_DONT_POST)
467 kiblnd_post_rx(rx, post_credit);
471 kiblnd_rx_complete (kib_rx_t *rx, int status, int nob)
473 kib_msg_t *msg = rx->rx_msg;
474 kib_conn_t *conn = rx->rx_conn;
475 lnet_ni_t *ni = conn->ibc_peer->ibp_ni;
476 kib_net_t *net = ni->ni_data;
480 LASSERT (net != NULL);
481 LASSERT (rx->rx_nob < 0); /* was posted */
482 rx->rx_nob = 0; /* isn't now */
484 if (conn->ibc_state > IBLND_CONN_ESTABLISHED)
487 if (status != IB_WC_SUCCESS) {
488 CNETERR("Rx from %s failed: %d\n",
489 libcfs_nid2str(conn->ibc_peer->ibp_nid), status);
496 rc = kiblnd_unpack_msg(msg, rx->rx_nob);
498 CERROR ("Error %d unpacking rx from %s\n",
499 rc, libcfs_nid2str(conn->ibc_peer->ibp_nid));
503 if (msg->ibm_srcnid != conn->ibc_peer->ibp_nid ||
504 msg->ibm_dstnid != ni->ni_nid ||
505 msg->ibm_srcstamp != conn->ibc_incarnation ||
506 msg->ibm_dststamp != net->ibn_incarnation) {
507 CERROR ("Stale rx from %s\n",
508 libcfs_nid2str(conn->ibc_peer->ibp_nid));
513 /* set time last known alive */
514 kiblnd_peer_alive(conn->ibc_peer);
516 /* racing with connection establishment/teardown! */
518 if (conn->ibc_state < IBLND_CONN_ESTABLISHED) {
519 rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
522 write_lock_irqsave(g_lock, flags);
523 /* must check holding global lock to eliminate race */
524 if (conn->ibc_state < IBLND_CONN_ESTABLISHED) {
525 list_add_tail(&rx->rx_list, &conn->ibc_early_rxs);
526 write_unlock_irqrestore(g_lock, flags);
529 write_unlock_irqrestore(g_lock, flags);
531 kiblnd_handle_rx(rx);
535 CDEBUG(D_NET, "rx %p conn %p\n", rx, conn);
536 kiblnd_close_conn(conn, err);
538 kiblnd_drop_rx(rx); /* Don't re-post rx. */
542 kiblnd_kvaddr_to_page (unsigned long vaddr)
546 if (is_vmalloc_addr((void *)vaddr)) {
547 page = vmalloc_to_page ((void *)vaddr);
548 LASSERT (page != NULL);
551 #ifdef CONFIG_HIGHMEM
552 if (vaddr >= PKMAP_BASE &&
553 vaddr < (PKMAP_BASE + LAST_PKMAP * PAGE_SIZE)) {
554 /* No highmem pages only used for bulk (kiov) I/O */
555 CERROR("find page for address in highmem\n");
559 page = virt_to_page (vaddr);
560 LASSERT (page != NULL);
565 kiblnd_fmr_map_tx(kib_net_t *net, kib_tx_t *tx, kib_rdma_desc_t *rd, __u32 nob)
568 kib_fmr_poolset_t *fps;
572 LASSERT(tx->tx_pool != NULL);
573 LASSERT(tx->tx_pool->tpo_pool.po_owner != NULL);
575 hdev = tx->tx_pool->tpo_hdev;
576 cpt = tx->tx_pool->tpo_pool.po_owner->ps_cpt;
578 fps = net->ibn_fmr_ps[cpt];
579 rc = kiblnd_fmr_pool_map(fps, tx, rd, nob, 0, &tx->fmr);
581 CERROR("Can't map %u pages: %d\n", nob, rc);
585 /* If rd is not tx_rd, it's going to get sent to a peer, who will need
587 rd->rd_key = tx->fmr.fmr_key;
588 rd->rd_frags[0].rf_addr &= ~hdev->ibh_page_mask;
589 rd->rd_frags[0].rf_nob = nob;
596 kiblnd_unmap_tx(lnet_ni_t *ni, kib_tx_t *tx)
598 kib_net_t *net = ni->ni_data;
600 LASSERT(net != NULL);
602 if (net->ibn_fmr_ps != NULL)
603 kiblnd_fmr_pool_unmap(&tx->fmr, tx->tx_status);
605 if (tx->tx_nfrags != 0) {
606 kiblnd_dma_unmap_sg(tx->tx_pool->tpo_hdev->ibh_ibdev,
607 tx->tx_frags, tx->tx_nfrags, tx->tx_dmadir);
613 kiblnd_map_tx(lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd, int nfrags)
615 kib_net_t *net = ni->ni_data;
616 kib_hca_dev_t *hdev = net->ibn_dev->ibd_hdev;
617 struct ib_mr *mr = NULL;
621 /* If rd is not tx_rd, it's going to get sent to a peer and I'm the
623 tx->tx_dmadir = (rd != tx->tx_rd) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
624 tx->tx_nfrags = nfrags;
626 rd->rd_nfrags = kiblnd_dma_map_sg(hdev->ibh_ibdev, tx->tx_frags,
627 tx->tx_nfrags, tx->tx_dmadir);
629 for (i = 0, nob = 0; i < rd->rd_nfrags; i++) {
630 rd->rd_frags[i].rf_nob = kiblnd_sg_dma_len(
631 hdev->ibh_ibdev, &tx->tx_frags[i]);
632 rd->rd_frags[i].rf_addr = kiblnd_sg_dma_address(
633 hdev->ibh_ibdev, &tx->tx_frags[i]);
634 nob += rd->rd_frags[i].rf_nob;
637 mr = kiblnd_find_rd_dma_mr(ni, rd,
638 (tx->tx_conn != NULL) ?
639 tx->tx_conn->ibc_max_frags : -1);
641 /* found pre-mapping MR */
642 rd->rd_key = (rd != tx->tx_rd) ? mr->rkey : mr->lkey;
646 if (net->ibn_fmr_ps != NULL)
647 return kiblnd_fmr_map_tx(net, tx, rd, nob);
654 kiblnd_setup_rd_iov(lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd,
655 unsigned int niov, struct kvec *iov, int offset, int nob)
657 kib_net_t *net = ni->ni_data;
659 struct scatterlist *sg;
666 LASSERT (net != NULL);
668 while (offset >= iov->iov_len) {
669 offset -= iov->iov_len;
679 vaddr = ((unsigned long)iov->iov_base) + offset;
680 page_offset = vaddr & (PAGE_SIZE - 1);
681 page = kiblnd_kvaddr_to_page(vaddr);
683 CERROR ("Can't find page\n");
687 fragnob = min((int)(iov->iov_len - offset), nob);
688 fragnob = min(fragnob, (int)PAGE_SIZE - page_offset);
690 sg_set_page(sg, page, fragnob, page_offset);
693 CERROR("lacking enough sg entries to map tx\n");
697 if (offset + fragnob < iov->iov_len) {
707 return kiblnd_map_tx(ni, tx, rd, sg - tx->tx_frags);
711 kiblnd_setup_rd_kiov (lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd,
712 int nkiov, lnet_kiov_t *kiov, int offset, int nob)
714 kib_net_t *net = ni->ni_data;
715 struct scatterlist *sg;
718 CDEBUG(D_NET, "niov %d offset %d nob %d\n", nkiov, offset, nob);
722 LASSERT (net != NULL);
724 while (offset >= kiov->kiov_len) {
725 offset -= kiov->kiov_len;
735 fragnob = min((int)(kiov->kiov_len - offset), nob);
737 sg_set_page(sg, kiov->kiov_page, fragnob,
738 kiov->kiov_offset + offset);
741 CERROR("lacking enough sg entries to map tx\n");
751 return kiblnd_map_tx(ni, tx, rd, sg - tx->tx_frags);
755 kiblnd_post_tx_locked (kib_conn_t *conn, kib_tx_t *tx, int credit)
756 __must_hold(&conn->ibc_lock)
758 kib_msg_t *msg = tx->tx_msg;
759 kib_peer_t *peer = conn->ibc_peer;
760 struct lnet_ni *ni = peer->ibp_ni;
761 int ver = conn->ibc_version;
765 LASSERT(tx->tx_queued);
766 /* We rely on this for QP sizing */
767 LASSERT(tx->tx_nwrq > 0);
768 LASSERT(tx->tx_nwrq <= 1 + conn->ibc_max_frags);
770 LASSERT(credit == 0 || credit == 1);
771 LASSERT(conn->ibc_outstanding_credits >= 0);
772 LASSERT(conn->ibc_outstanding_credits <= conn->ibc_queue_depth);
773 LASSERT(conn->ibc_credits >= 0);
774 LASSERT(conn->ibc_credits <= conn->ibc_queue_depth);
776 if (conn->ibc_nsends_posted ==
777 kiblnd_concurrent_sends(ver, ni)) {
778 /* tx completions outstanding... */
779 CDEBUG(D_NET, "%s: posted enough\n",
780 libcfs_nid2str(peer->ibp_nid));
784 if (credit != 0 && conn->ibc_credits == 0) { /* no credits */
785 CDEBUG(D_NET, "%s: no credits\n",
786 libcfs_nid2str(peer->ibp_nid));
790 if (credit != 0 && !IBLND_OOB_CAPABLE(ver) &&
791 conn->ibc_credits == 1 && /* last credit reserved */
792 msg->ibm_type != IBLND_MSG_NOOP) { /* for NOOP */
793 CDEBUG(D_NET, "%s: not using last credit\n",
794 libcfs_nid2str(peer->ibp_nid));
798 /* NB don't drop ibc_lock before bumping tx_sending */
799 list_del(&tx->tx_list);
802 if (msg->ibm_type == IBLND_MSG_NOOP &&
803 (!kiblnd_need_noop(conn) || /* redundant NOOP */
804 (IBLND_OOB_CAPABLE(ver) && /* posted enough NOOP */
805 conn->ibc_noops_posted == IBLND_OOB_MSGS(ver)))) {
806 /* OK to drop when posted enough NOOPs, since
807 * kiblnd_check_sends will queue NOOP again when
808 * posted NOOPs complete */
809 spin_unlock(&conn->ibc_lock);
810 kiblnd_tx_done(peer->ibp_ni, tx);
811 spin_lock(&conn->ibc_lock);
812 CDEBUG(D_NET, "%s(%d): redundant or enough NOOP\n",
813 libcfs_nid2str(peer->ibp_nid),
814 conn->ibc_noops_posted);
818 kiblnd_pack_msg(peer->ibp_ni, msg, ver, conn->ibc_outstanding_credits,
819 peer->ibp_nid, conn->ibc_incarnation);
821 conn->ibc_credits -= credit;
822 conn->ibc_outstanding_credits = 0;
823 conn->ibc_nsends_posted++;
824 if (msg->ibm_type == IBLND_MSG_NOOP)
825 conn->ibc_noops_posted++;
827 /* CAVEAT EMPTOR! This tx could be the PUT_DONE of an RDMA
828 * PUT. If so, it was first queued here as a PUT_REQ, sent and
829 * stashed on ibc_active_txs, matched by an incoming PUT_ACK,
830 * and then re-queued here. It's (just) possible that
831 * tx_sending is non-zero if we've not done the tx_complete()
832 * from the first send; hence the ++ rather than = below. */
834 list_add(&tx->tx_list, &conn->ibc_active_txs);
836 /* I'm still holding ibc_lock! */
837 if (conn->ibc_state != IBLND_CONN_ESTABLISHED) {
839 } else if (tx->tx_pool->tpo_pool.po_failed ||
840 conn->ibc_hdev != tx->tx_pool->tpo_hdev) {
841 /* close_conn will launch failover */
844 struct kib_fast_reg_descriptor *frd = tx->fmr.fmr_frd;
845 struct ib_send_wr *bad = &tx->tx_wrq[tx->tx_nwrq - 1].wr;
846 struct ib_send_wr *wr = &tx->tx_wrq[0].wr;
849 if (!frd->frd_valid) {
850 wr = &frd->frd_inv_wr.wr;
851 wr->next = &frd->frd_fastreg_wr.wr;
853 wr = &frd->frd_fastreg_wr.wr;
855 frd->frd_fastreg_wr.wr.next = &tx->tx_wrq[0].wr;
858 LASSERTF(bad->wr_id == kiblnd_ptr2wreqid(tx, IBLND_WID_TX),
859 "bad wr_id "LPX64", opc %d, flags %d, peer: %s\n",
860 bad->wr_id, bad->opcode, bad->send_flags,
861 libcfs_nid2str(conn->ibc_peer->ibp_nid));
864 rc = ib_post_send(conn->ibc_cmid->qp, wr, &bad);
867 conn->ibc_last_send = jiffies;
872 /* NB credits are transferred in the actual
873 * message, which can only be the last work item */
874 conn->ibc_credits += credit;
875 conn->ibc_outstanding_credits += msg->ibm_credits;
876 conn->ibc_nsends_posted--;
877 if (msg->ibm_type == IBLND_MSG_NOOP)
878 conn->ibc_noops_posted--;
884 done = (tx->tx_sending == 0);
886 list_del(&tx->tx_list);
888 spin_unlock(&conn->ibc_lock);
890 if (conn->ibc_state == IBLND_CONN_ESTABLISHED)
891 CERROR("Error %d posting transmit to %s\n",
892 rc, libcfs_nid2str(peer->ibp_nid));
894 CDEBUG(D_NET, "Error %d posting transmit to %s\n",
895 rc, libcfs_nid2str(peer->ibp_nid));
897 kiblnd_close_conn(conn, rc);
900 kiblnd_tx_done(peer->ibp_ni, tx);
902 spin_lock(&conn->ibc_lock);
908 kiblnd_check_sends (kib_conn_t *conn)
910 int ver = conn->ibc_version;
911 lnet_ni_t *ni = conn->ibc_peer->ibp_ni;
914 /* Don't send anything until after the connection is established */
915 if (conn->ibc_state < IBLND_CONN_ESTABLISHED) {
916 CDEBUG(D_NET, "%s too soon\n",
917 libcfs_nid2str(conn->ibc_peer->ibp_nid));
921 spin_lock(&conn->ibc_lock);
923 LASSERT(conn->ibc_nsends_posted <=
924 kiblnd_concurrent_sends(ver, ni));
925 LASSERT (!IBLND_OOB_CAPABLE(ver) ||
926 conn->ibc_noops_posted <= IBLND_OOB_MSGS(ver));
927 LASSERT (conn->ibc_reserved_credits >= 0);
929 while (conn->ibc_reserved_credits > 0 &&
930 !list_empty(&conn->ibc_tx_queue_rsrvd)) {
931 tx = list_entry(conn->ibc_tx_queue_rsrvd.next,
933 list_del(&tx->tx_list);
934 list_add_tail(&tx->tx_list, &conn->ibc_tx_queue);
935 conn->ibc_reserved_credits--;
938 if (kiblnd_need_noop(conn)) {
939 spin_unlock(&conn->ibc_lock);
941 tx = kiblnd_get_idle_tx(ni, conn->ibc_peer->ibp_nid);
943 kiblnd_init_tx_msg(ni, tx, IBLND_MSG_NOOP, 0);
945 spin_lock(&conn->ibc_lock);
947 kiblnd_queue_tx_locked(tx, conn);
953 if (!list_empty(&conn->ibc_tx_queue_nocred)) {
955 tx = list_entry(conn->ibc_tx_queue_nocred.next,
957 } else if (!list_empty(&conn->ibc_tx_noops)) {
958 LASSERT (!IBLND_OOB_CAPABLE(ver));
960 tx = list_entry(conn->ibc_tx_noops.next,
962 } else if (!list_empty(&conn->ibc_tx_queue)) {
964 tx = list_entry(conn->ibc_tx_queue.next,
969 if (kiblnd_post_tx_locked(conn, tx, credit) != 0)
973 spin_unlock(&conn->ibc_lock);
977 kiblnd_tx_complete (kib_tx_t *tx, int status)
979 int failed = (status != IB_WC_SUCCESS);
980 kib_conn_t *conn = tx->tx_conn;
983 LASSERT (tx->tx_sending > 0);
986 if (conn->ibc_state == IBLND_CONN_ESTABLISHED)
987 CNETERR("Tx -> %s cookie "LPX64
988 " sending %d waiting %d: failed %d\n",
989 libcfs_nid2str(conn->ibc_peer->ibp_nid),
990 tx->tx_cookie, tx->tx_sending, tx->tx_waiting,
993 kiblnd_close_conn(conn, -EIO);
995 kiblnd_peer_alive(conn->ibc_peer);
998 spin_lock(&conn->ibc_lock);
1000 /* I could be racing with rdma completion. Whoever makes 'tx' idle
1001 * gets to free it, which also drops its ref on 'conn'. */
1004 conn->ibc_nsends_posted--;
1005 if (tx->tx_msg->ibm_type == IBLND_MSG_NOOP)
1006 conn->ibc_noops_posted--;
1009 tx->tx_waiting = 0; /* don't wait for peer */
1010 tx->tx_status = -EIO;
1013 idle = (tx->tx_sending == 0) && /* This is the final callback */
1014 !tx->tx_waiting && /* Not waiting for peer */
1015 !tx->tx_queued; /* Not re-queued (PUT_DONE) */
1017 list_del(&tx->tx_list);
1019 kiblnd_conn_addref(conn); /* 1 ref for me.... */
1021 spin_unlock(&conn->ibc_lock);
1024 kiblnd_tx_done(conn->ibc_peer->ibp_ni, tx);
1026 kiblnd_check_sends(conn);
1028 kiblnd_conn_decref(conn); /* ...until here */
1032 kiblnd_init_tx_msg (lnet_ni_t *ni, kib_tx_t *tx, int type, int body_nob)
1034 kib_hca_dev_t *hdev = tx->tx_pool->tpo_hdev;
1035 struct ib_sge *sge = &tx->tx_sge[tx->tx_nwrq];
1036 struct ib_rdma_wr *wrq;
1037 int nob = offsetof(kib_msg_t, ibm_u) + body_nob;
1038 struct ib_mr *mr = hdev->ibh_mrs;
1040 LASSERT(tx->tx_nwrq >= 0);
1041 LASSERT(tx->tx_nwrq < IBLND_MAX_RDMA_FRAGS + 1);
1042 LASSERT(nob <= IBLND_MSG_SIZE);
1043 LASSERT(mr != NULL);
1045 kiblnd_init_msg(tx->tx_msg, type, body_nob);
1047 sge->lkey = mr->lkey;
1048 sge->addr = tx->tx_msgaddr;
1051 wrq = &tx->tx_wrq[tx->tx_nwrq];
1052 memset(wrq, 0, sizeof(*wrq));
1054 wrq->wr.next = NULL;
1055 wrq->wr.wr_id = kiblnd_ptr2wreqid(tx, IBLND_WID_TX);
1056 wrq->wr.sg_list = sge;
1057 wrq->wr.num_sge = 1;
1058 wrq->wr.opcode = IB_WR_SEND;
1059 wrq->wr.send_flags = IB_SEND_SIGNALED;
1065 kiblnd_init_rdma(kib_conn_t *conn, kib_tx_t *tx, int type,
1066 int resid, kib_rdma_desc_t *dstrd, __u64 dstcookie)
1068 kib_msg_t *ibmsg = tx->tx_msg;
1069 kib_rdma_desc_t *srcrd = tx->tx_rd;
1070 struct ib_sge *sge = &tx->tx_sge[0];
1071 struct ib_rdma_wr *wrq;
1077 LASSERT (!in_interrupt());
1078 LASSERT (tx->tx_nwrq == 0);
1079 LASSERT (type == IBLND_MSG_GET_DONE ||
1080 type == IBLND_MSG_PUT_DONE);
1082 srcidx = dstidx = 0;
1085 if (srcidx >= srcrd->rd_nfrags) {
1086 CERROR("Src buffer exhausted: %d frags\n", srcidx);
1091 if (dstidx == dstrd->rd_nfrags) {
1092 CERROR("Dst buffer exhausted: %d frags\n", dstidx);
1097 if (tx->tx_nwrq >= conn->ibc_max_frags) {
1098 CERROR("RDMA has too many fragments for peer %s (%d), "
1099 "src idx/frags: %d/%d dst idx/frags: %d/%d\n",
1100 libcfs_nid2str(conn->ibc_peer->ibp_nid),
1101 conn->ibc_max_frags,
1102 srcidx, srcrd->rd_nfrags,
1103 dstidx, dstrd->rd_nfrags);
1108 wrknob = MIN(MIN(kiblnd_rd_frag_size(srcrd, srcidx),
1109 kiblnd_rd_frag_size(dstrd, dstidx)), resid);
1111 sge = &tx->tx_sge[tx->tx_nwrq];
1112 sge->addr = kiblnd_rd_frag_addr(srcrd, srcidx);
1113 sge->lkey = kiblnd_rd_frag_key(srcrd, srcidx);
1114 sge->length = wrknob;
1116 wrq = &tx->tx_wrq[tx->tx_nwrq];
1118 wrq->wr.next = &(wrq + 1)->wr;
1119 wrq->wr.wr_id = kiblnd_ptr2wreqid(tx, IBLND_WID_RDMA);
1120 wrq->wr.sg_list = sge;
1121 wrq->wr.num_sge = 1;
1122 wrq->wr.opcode = IB_WR_RDMA_WRITE;
1123 wrq->wr.send_flags = 0;
1125 #ifdef HAVE_IB_RDMA_WR
1126 wrq->remote_addr = kiblnd_rd_frag_addr(dstrd, dstidx);
1127 wrq->rkey = kiblnd_rd_frag_key(dstrd, dstidx);
1129 wrq->wr.wr.rdma.remote_addr = kiblnd_rd_frag_addr(dstrd, dstidx);
1130 wrq->wr.wr.rdma.rkey = kiblnd_rd_frag_key(dstrd, dstidx);
1133 srcidx = kiblnd_rd_consume_frag(srcrd, srcidx, wrknob);
1134 dstidx = kiblnd_rd_consume_frag(dstrd, dstidx, wrknob);
1143 if (rc < 0) /* no RDMA if completing with failure */
1146 ibmsg->ibm_u.completion.ibcm_status = rc;
1147 ibmsg->ibm_u.completion.ibcm_cookie = dstcookie;
1148 kiblnd_init_tx_msg(conn->ibc_peer->ibp_ni, tx,
1149 type, sizeof (kib_completion_msg_t));
1155 kiblnd_queue_tx_locked(kib_tx_t *tx, kib_conn_t *conn)
1157 struct list_head *q;
1159 LASSERT(tx->tx_nwrq > 0); /* work items set up */
1160 LASSERT(!tx->tx_queued); /* not queued for sending already */
1161 LASSERT(conn->ibc_state >= IBLND_CONN_ESTABLISHED);
1164 tx->tx_deadline = jiffies +
1165 msecs_to_jiffies(*kiblnd_tunables.kib_timeout *
1168 if (tx->tx_conn == NULL) {
1169 kiblnd_conn_addref(conn);
1171 LASSERT (tx->tx_msg->ibm_type != IBLND_MSG_PUT_DONE);
1173 /* PUT_DONE first attached to conn as a PUT_REQ */
1174 LASSERT (tx->tx_conn == conn);
1175 LASSERT (tx->tx_msg->ibm_type == IBLND_MSG_PUT_DONE);
1178 switch (tx->tx_msg->ibm_type) {
1182 case IBLND_MSG_PUT_REQ:
1183 case IBLND_MSG_GET_REQ:
1184 q = &conn->ibc_tx_queue_rsrvd;
1187 case IBLND_MSG_PUT_NAK:
1188 case IBLND_MSG_PUT_ACK:
1189 case IBLND_MSG_PUT_DONE:
1190 case IBLND_MSG_GET_DONE:
1191 q = &conn->ibc_tx_queue_nocred;
1194 case IBLND_MSG_NOOP:
1195 if (IBLND_OOB_CAPABLE(conn->ibc_version))
1196 q = &conn->ibc_tx_queue_nocred;
1198 q = &conn->ibc_tx_noops;
1201 case IBLND_MSG_IMMEDIATE:
1202 q = &conn->ibc_tx_queue;
1206 list_add_tail(&tx->tx_list, q);
1210 kiblnd_queue_tx (kib_tx_t *tx, kib_conn_t *conn)
1212 spin_lock(&conn->ibc_lock);
1213 kiblnd_queue_tx_locked(tx, conn);
1214 spin_unlock(&conn->ibc_lock);
1216 kiblnd_check_sends(conn);
1219 static int kiblnd_resolve_addr(struct rdma_cm_id *cmid,
1220 struct sockaddr_in *srcaddr,
1221 struct sockaddr_in *dstaddr,
1224 unsigned short port;
1227 /* allow the port to be reused */
1228 rc = rdma_set_reuseaddr(cmid, 1);
1230 CERROR("Unable to set reuse on cmid: %d\n", rc);
1234 /* look for a free privileged port */
1235 for (port = PROT_SOCK-1; port > 0; port--) {
1236 srcaddr->sin_port = htons(port);
1237 rc = rdma_resolve_addr(cmid,
1238 (struct sockaddr *)srcaddr,
1239 (struct sockaddr *)dstaddr,
1242 CDEBUG(D_NET, "bound to port %hu\n", port);
1244 } else if (rc == -EADDRINUSE || rc == -EADDRNOTAVAIL) {
1245 CDEBUG(D_NET, "bind to port %hu failed: %d\n",
1252 CERROR("Failed to bind to a free privileged port\n");
1257 kiblnd_connect_peer (kib_peer_t *peer)
1259 struct rdma_cm_id *cmid;
1261 kib_net_t *net = peer->ibp_ni->ni_data;
1262 struct sockaddr_in srcaddr;
1263 struct sockaddr_in dstaddr;
1266 LASSERT (net != NULL);
1267 LASSERT (peer->ibp_connecting > 0);
1268 LASSERT(!peer->ibp_reconnecting);
1270 cmid = kiblnd_rdma_create_id(kiblnd_cm_callback, peer, RDMA_PS_TCP,
1274 CERROR("Can't create CMID for %s: %ld\n",
1275 libcfs_nid2str(peer->ibp_nid), PTR_ERR(cmid));
1281 memset(&srcaddr, 0, sizeof(srcaddr));
1282 srcaddr.sin_family = AF_INET;
1283 srcaddr.sin_addr.s_addr = htonl(dev->ibd_ifip);
1285 memset(&dstaddr, 0, sizeof(dstaddr));
1286 dstaddr.sin_family = AF_INET;
1287 dstaddr.sin_port = htons(*kiblnd_tunables.kib_service);
1288 dstaddr.sin_addr.s_addr = htonl(LNET_NIDADDR(peer->ibp_nid));
1290 kiblnd_peer_addref(peer); /* cmid's ref */
1292 if (*kiblnd_tunables.kib_use_priv_port) {
1293 rc = kiblnd_resolve_addr(cmid, &srcaddr, &dstaddr,
1294 *kiblnd_tunables.kib_timeout * 1000);
1296 rc = rdma_resolve_addr(cmid,
1297 (struct sockaddr *)&srcaddr,
1298 (struct sockaddr *)&dstaddr,
1299 *kiblnd_tunables.kib_timeout * 1000);
1302 /* Can't initiate address resolution: */
1303 CERROR("Can't resolve addr for %s: %d\n",
1304 libcfs_nid2str(peer->ibp_nid), rc);
1308 LASSERT (cmid->device != NULL);
1309 CDEBUG(D_NET, "%s: connection bound to %s:%pI4h:%s\n",
1310 libcfs_nid2str(peer->ibp_nid), dev->ibd_ifname,
1311 &dev->ibd_ifip, cmid->device->name);
1316 kiblnd_peer_connect_failed(peer, 1, rc);
1317 kiblnd_peer_decref(peer); /* cmid's ref */
1318 rdma_destroy_id(cmid);
1321 kiblnd_peer_connect_failed(peer, 1, rc);
1325 kiblnd_reconnect_peer(kib_peer_t *peer)
1327 rwlock_t *glock = &kiblnd_data.kib_global_lock;
1328 char *reason = NULL;
1329 struct list_head txs;
1330 unsigned long flags;
1332 INIT_LIST_HEAD(&txs);
1334 write_lock_irqsave(glock, flags);
1335 if (peer->ibp_reconnecting == 0) {
1336 if (peer->ibp_accepting)
1337 reason = "accepting";
1338 else if (peer->ibp_connecting)
1339 reason = "connecting";
1340 else if (!list_empty(&peer->ibp_conns))
1341 reason = "connected";
1342 else /* connected then closed */
1348 LASSERT(!peer->ibp_accepting && !peer->ibp_connecting &&
1349 list_empty(&peer->ibp_conns));
1350 peer->ibp_reconnecting = 0;
1352 if (!kiblnd_peer_active(peer)) {
1353 list_splice_init(&peer->ibp_tx_queue, &txs);
1354 reason = "unlinked";
1358 peer->ibp_connecting++;
1359 peer->ibp_reconnected++;
1360 write_unlock_irqrestore(glock, flags);
1362 kiblnd_connect_peer(peer);
1366 write_unlock_irqrestore(glock, flags);
1368 CWARN("Abort reconnection of %s: %s\n",
1369 libcfs_nid2str(peer->ibp_nid), reason);
1370 kiblnd_txlist_done(peer->ibp_ni, &txs, -ECONNABORTED);
1375 kiblnd_launch_tx (lnet_ni_t *ni, kib_tx_t *tx, lnet_nid_t nid)
1380 rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
1381 unsigned long flags;
1384 /* If I get here, I've committed to send, so I complete the tx with
1385 * failure on any problems */
1387 LASSERT (tx == NULL || tx->tx_conn == NULL); /* only set when assigned a conn */
1388 LASSERT (tx == NULL || tx->tx_nwrq > 0); /* work items have been set up */
1390 /* First time, just use a read lock since I expect to find my peer
1392 read_lock_irqsave(g_lock, flags);
1394 peer = kiblnd_find_peer_locked(nid);
1395 if (peer != NULL && !list_empty(&peer->ibp_conns)) {
1396 /* Found a peer with an established connection */
1397 conn = kiblnd_get_conn_locked(peer);
1398 kiblnd_conn_addref(conn); /* 1 ref for me... */
1400 read_unlock_irqrestore(g_lock, flags);
1403 kiblnd_queue_tx(tx, conn);
1404 kiblnd_conn_decref(conn); /* ...to here */
1408 read_unlock(g_lock);
1409 /* Re-try with a write lock */
1412 peer = kiblnd_find_peer_locked(nid);
1414 if (list_empty(&peer->ibp_conns)) {
1415 /* found a peer, but it's still connecting... */
1416 LASSERT(kiblnd_peer_connecting(peer));
1418 list_add_tail(&tx->tx_list,
1419 &peer->ibp_tx_queue);
1420 write_unlock_irqrestore(g_lock, flags);
1422 conn = kiblnd_get_conn_locked(peer);
1423 kiblnd_conn_addref(conn); /* 1 ref for me... */
1425 write_unlock_irqrestore(g_lock, flags);
1428 kiblnd_queue_tx(tx, conn);
1429 kiblnd_conn_decref(conn); /* ...to here */
1434 write_unlock_irqrestore(g_lock, flags);
1436 /* Allocate a peer ready to add to the peer table and retry */
1437 rc = kiblnd_create_peer(ni, &peer, nid);
1439 CERROR("Can't create peer %s\n", libcfs_nid2str(nid));
1441 tx->tx_status = -EHOSTUNREACH;
1443 kiblnd_tx_done(ni, tx);
1448 write_lock_irqsave(g_lock, flags);
1450 peer2 = kiblnd_find_peer_locked(nid);
1451 if (peer2 != NULL) {
1452 if (list_empty(&peer2->ibp_conns)) {
1453 /* found a peer, but it's still connecting... */
1454 LASSERT(kiblnd_peer_connecting(peer2));
1456 list_add_tail(&tx->tx_list,
1457 &peer2->ibp_tx_queue);
1458 write_unlock_irqrestore(g_lock, flags);
1460 conn = kiblnd_get_conn_locked(peer2);
1461 kiblnd_conn_addref(conn); /* 1 ref for me... */
1463 write_unlock_irqrestore(g_lock, flags);
1466 kiblnd_queue_tx(tx, conn);
1467 kiblnd_conn_decref(conn); /* ...to here */
1470 kiblnd_peer_decref(peer);
1474 /* Brand new peer */
1475 LASSERT (peer->ibp_connecting == 0);
1476 peer->ibp_connecting = 1;
1478 /* always called with a ref on ni, which prevents ni being shutdown */
1479 LASSERT (((kib_net_t *)ni->ni_data)->ibn_shutdown == 0);
1482 list_add_tail(&tx->tx_list, &peer->ibp_tx_queue);
1484 kiblnd_peer_addref(peer);
1485 list_add_tail(&peer->ibp_list, kiblnd_nid2peerlist(nid));
1487 write_unlock_irqrestore(g_lock, flags);
1489 kiblnd_connect_peer(peer);
1490 kiblnd_peer_decref(peer);
1494 kiblnd_send (lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg)
1496 lnet_hdr_t *hdr = &lntmsg->msg_hdr;
1497 int type = lntmsg->msg_type;
1498 lnet_process_id_t target = lntmsg->msg_target;
1499 int target_is_router = lntmsg->msg_target_is_router;
1500 int routing = lntmsg->msg_routing;
1501 unsigned int payload_niov = lntmsg->msg_niov;
1502 struct kvec *payload_iov = lntmsg->msg_iov;
1503 lnet_kiov_t *payload_kiov = lntmsg->msg_kiov;
1504 unsigned int payload_offset = lntmsg->msg_offset;
1505 unsigned int payload_nob = lntmsg->msg_len;
1507 kib_rdma_desc_t *rd;
1512 /* NB 'private' is different depending on what we're sending.... */
1514 CDEBUG(D_NET, "sending %d bytes in %d frags to %s\n",
1515 payload_nob, payload_niov, libcfs_id2str(target));
1517 LASSERT (payload_nob == 0 || payload_niov > 0);
1518 LASSERT (payload_niov <= LNET_MAX_IOV);
1520 /* Thread context */
1521 LASSERT (!in_interrupt());
1522 /* payload is either all vaddrs or all pages */
1523 LASSERT (!(payload_kiov != NULL && payload_iov != NULL));
1531 LASSERT (payload_nob == 0);
1535 if (routing || target_is_router)
1536 break; /* send IMMEDIATE */
1538 /* is the REPLY message too small for RDMA? */
1539 nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[lntmsg->msg_md->md_length]);
1540 if (nob <= IBLND_MSG_SIZE)
1541 break; /* send IMMEDIATE */
1543 tx = kiblnd_get_idle_tx(ni, target.nid);
1545 CERROR("Can't allocate txd for GET to %s\n",
1546 libcfs_nid2str(target.nid));
1551 rd = &ibmsg->ibm_u.get.ibgm_rd;
1552 if ((lntmsg->msg_md->md_options & LNET_MD_KIOV) == 0)
1553 rc = kiblnd_setup_rd_iov(ni, tx, rd,
1554 lntmsg->msg_md->md_niov,
1555 lntmsg->msg_md->md_iov.iov,
1556 0, lntmsg->msg_md->md_length);
1558 rc = kiblnd_setup_rd_kiov(ni, tx, rd,
1559 lntmsg->msg_md->md_niov,
1560 lntmsg->msg_md->md_iov.kiov,
1561 0, lntmsg->msg_md->md_length);
1563 CERROR("Can't setup GET sink for %s: %d\n",
1564 libcfs_nid2str(target.nid), rc);
1565 kiblnd_tx_done(ni, tx);
1569 nob = offsetof(kib_get_msg_t, ibgm_rd.rd_frags[rd->rd_nfrags]);
1570 ibmsg->ibm_u.get.ibgm_cookie = tx->tx_cookie;
1571 ibmsg->ibm_u.get.ibgm_hdr = *hdr;
1573 kiblnd_init_tx_msg(ni, tx, IBLND_MSG_GET_REQ, nob);
1575 tx->tx_lntmsg[1] = lnet_create_reply_msg(ni, lntmsg);
1576 if (tx->tx_lntmsg[1] == NULL) {
1577 CERROR("Can't create reply for GET -> %s\n",
1578 libcfs_nid2str(target.nid));
1579 kiblnd_tx_done(ni, tx);
1583 tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg[0,1] on completion */
1584 tx->tx_waiting = 1; /* waiting for GET_DONE */
1585 kiblnd_launch_tx(ni, tx, target.nid);
1588 case LNET_MSG_REPLY:
1590 /* Is the payload small enough not to need RDMA? */
1591 nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[payload_nob]);
1592 if (nob <= IBLND_MSG_SIZE)
1593 break; /* send IMMEDIATE */
1595 tx = kiblnd_get_idle_tx(ni, target.nid);
1597 CERROR("Can't allocate %s txd for %s\n",
1598 type == LNET_MSG_PUT ? "PUT" : "REPLY",
1599 libcfs_nid2str(target.nid));
1603 if (payload_kiov == NULL)
1604 rc = kiblnd_setup_rd_iov(ni, tx, tx->tx_rd,
1605 payload_niov, payload_iov,
1606 payload_offset, payload_nob);
1608 rc = kiblnd_setup_rd_kiov(ni, tx, tx->tx_rd,
1609 payload_niov, payload_kiov,
1610 payload_offset, payload_nob);
1612 CERROR("Can't setup PUT src for %s: %d\n",
1613 libcfs_nid2str(target.nid), rc);
1614 kiblnd_tx_done(ni, tx);
1619 ibmsg->ibm_u.putreq.ibprm_hdr = *hdr;
1620 ibmsg->ibm_u.putreq.ibprm_cookie = tx->tx_cookie;
1621 kiblnd_init_tx_msg(ni, tx, IBLND_MSG_PUT_REQ, sizeof(kib_putreq_msg_t));
1623 tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */
1624 tx->tx_waiting = 1; /* waiting for PUT_{ACK,NAK} */
1625 kiblnd_launch_tx(ni, tx, target.nid);
1629 /* send IMMEDIATE */
1631 LASSERT (offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[payload_nob])
1634 tx = kiblnd_get_idle_tx(ni, target.nid);
1636 CERROR ("Can't send %d to %s: tx descs exhausted\n",
1637 type, libcfs_nid2str(target.nid));
1642 ibmsg->ibm_u.immediate.ibim_hdr = *hdr;
1644 if (payload_kiov != NULL)
1645 lnet_copy_kiov2flat(IBLND_MSG_SIZE, ibmsg,
1646 offsetof(kib_msg_t, ibm_u.immediate.ibim_payload),
1647 payload_niov, payload_kiov,
1648 payload_offset, payload_nob);
1650 lnet_copy_iov2flat(IBLND_MSG_SIZE, ibmsg,
1651 offsetof(kib_msg_t, ibm_u.immediate.ibim_payload),
1652 payload_niov, payload_iov,
1653 payload_offset, payload_nob);
1655 nob = offsetof(kib_immediate_msg_t, ibim_payload[payload_nob]);
1656 kiblnd_init_tx_msg(ni, tx, IBLND_MSG_IMMEDIATE, nob);
1658 tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */
1659 kiblnd_launch_tx(ni, tx, target.nid);
1664 kiblnd_reply (lnet_ni_t *ni, kib_rx_t *rx, lnet_msg_t *lntmsg)
1666 lnet_process_id_t target = lntmsg->msg_target;
1667 unsigned int niov = lntmsg->msg_niov;
1668 struct kvec *iov = lntmsg->msg_iov;
1669 lnet_kiov_t *kiov = lntmsg->msg_kiov;
1670 unsigned int offset = lntmsg->msg_offset;
1671 unsigned int nob = lntmsg->msg_len;
1675 tx = kiblnd_get_idle_tx(ni, rx->rx_conn->ibc_peer->ibp_nid);
1677 CERROR("Can't get tx for REPLY to %s\n",
1678 libcfs_nid2str(target.nid));
1684 else if (kiov == NULL)
1685 rc = kiblnd_setup_rd_iov(ni, tx, tx->tx_rd,
1686 niov, iov, offset, nob);
1688 rc = kiblnd_setup_rd_kiov(ni, tx, tx->tx_rd,
1689 niov, kiov, offset, nob);
1692 CERROR("Can't setup GET src for %s: %d\n",
1693 libcfs_nid2str(target.nid), rc);
1697 rc = kiblnd_init_rdma(rx->rx_conn, tx,
1698 IBLND_MSG_GET_DONE, nob,
1699 &rx->rx_msg->ibm_u.get.ibgm_rd,
1700 rx->rx_msg->ibm_u.get.ibgm_cookie);
1702 CERROR("Can't setup rdma for GET from %s: %d\n",
1703 libcfs_nid2str(target.nid), rc);
1708 /* No RDMA: local completion may happen now! */
1709 lnet_finalize(ni, lntmsg, 0);
1711 /* RDMA: lnet_finalize(lntmsg) when it
1713 tx->tx_lntmsg[0] = lntmsg;
1716 kiblnd_queue_tx(tx, rx->rx_conn);
1720 kiblnd_tx_done(ni, tx);
1722 lnet_finalize(ni, lntmsg, -EIO);
1726 kiblnd_recv(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg, int delayed,
1727 unsigned int niov, struct kvec *iov, lnet_kiov_t *kiov,
1728 unsigned int offset, unsigned int mlen, unsigned int rlen)
1730 kib_rx_t *rx = private;
1731 kib_msg_t *rxmsg = rx->rx_msg;
1732 kib_conn_t *conn = rx->rx_conn;
1735 int post_credit = IBLND_POSTRX_PEER_CREDIT;
1738 LASSERT (mlen <= rlen);
1739 LASSERT (!in_interrupt());
1740 /* Either all pages or all vaddrs */
1741 LASSERT (!(kiov != NULL && iov != NULL));
1743 switch (rxmsg->ibm_type) {
1747 case IBLND_MSG_IMMEDIATE:
1748 nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[rlen]);
1749 if (nob > rx->rx_nob) {
1750 CERROR ("Immediate message from %s too big: %d(%d)\n",
1751 libcfs_nid2str(rxmsg->ibm_u.immediate.ibim_hdr.src_nid),
1758 lnet_copy_flat2kiov(niov, kiov, offset,
1759 IBLND_MSG_SIZE, rxmsg,
1760 offsetof(kib_msg_t, ibm_u.immediate.ibim_payload),
1763 lnet_copy_flat2iov(niov, iov, offset,
1764 IBLND_MSG_SIZE, rxmsg,
1765 offsetof(kib_msg_t, ibm_u.immediate.ibim_payload),
1767 lnet_finalize (ni, lntmsg, 0);
1770 case IBLND_MSG_PUT_REQ: {
1772 kib_rdma_desc_t *rd;
1775 lnet_finalize(ni, lntmsg, 0);
1776 kiblnd_send_completion(rx->rx_conn, IBLND_MSG_PUT_NAK, 0,
1777 rxmsg->ibm_u.putreq.ibprm_cookie);
1781 tx = kiblnd_get_idle_tx(ni, conn->ibc_peer->ibp_nid);
1783 CERROR("Can't allocate tx for %s\n",
1784 libcfs_nid2str(conn->ibc_peer->ibp_nid));
1785 /* Not replying will break the connection */
1791 rd = &txmsg->ibm_u.putack.ibpam_rd;
1793 rc = kiblnd_setup_rd_iov(ni, tx, rd,
1794 niov, iov, offset, mlen);
1796 rc = kiblnd_setup_rd_kiov(ni, tx, rd,
1797 niov, kiov, offset, mlen);
1799 CERROR("Can't setup PUT sink for %s: %d\n",
1800 libcfs_nid2str(conn->ibc_peer->ibp_nid), rc);
1801 kiblnd_tx_done(ni, tx);
1802 /* tell peer it's over */
1803 kiblnd_send_completion(rx->rx_conn, IBLND_MSG_PUT_NAK, rc,
1804 rxmsg->ibm_u.putreq.ibprm_cookie);
1808 nob = offsetof(kib_putack_msg_t, ibpam_rd.rd_frags[rd->rd_nfrags]);
1809 txmsg->ibm_u.putack.ibpam_src_cookie = rxmsg->ibm_u.putreq.ibprm_cookie;
1810 txmsg->ibm_u.putack.ibpam_dst_cookie = tx->tx_cookie;
1812 kiblnd_init_tx_msg(ni, tx, IBLND_MSG_PUT_ACK, nob);
1814 tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */
1815 tx->tx_waiting = 1; /* waiting for PUT_DONE */
1816 kiblnd_queue_tx(tx, conn);
1818 /* reposted buffer reserved for PUT_DONE */
1819 post_credit = IBLND_POSTRX_NO_CREDIT;
1823 case IBLND_MSG_GET_REQ:
1824 if (lntmsg != NULL) {
1825 /* Optimized GET; RDMA lntmsg's payload */
1826 kiblnd_reply(ni, rx, lntmsg);
1828 /* GET didn't match anything */
1829 kiblnd_send_completion(rx->rx_conn, IBLND_MSG_GET_DONE,
1831 rxmsg->ibm_u.get.ibgm_cookie);
1836 kiblnd_post_rx(rx, post_credit);
1841 kiblnd_thread_start(int (*fn)(void *arg), void *arg, char *name)
1843 struct task_struct *task = kthread_run(fn, arg, name);
1846 return PTR_ERR(task);
1848 atomic_inc(&kiblnd_data.kib_nthreads);
1853 kiblnd_thread_fini (void)
1855 atomic_dec (&kiblnd_data.kib_nthreads);
1859 kiblnd_peer_alive (kib_peer_t *peer)
1861 /* This is racy, but everyone's only writing cfs_time_current() */
1862 peer->ibp_last_alive = cfs_time_current();
1867 kiblnd_peer_notify (kib_peer_t *peer)
1870 cfs_time_t last_alive = 0;
1871 unsigned long flags;
1873 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1875 if (kiblnd_peer_idle(peer) && peer->ibp_error != 0) {
1876 error = peer->ibp_error;
1877 peer->ibp_error = 0;
1879 last_alive = peer->ibp_last_alive;
1882 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1885 lnet_notify(peer->ibp_ni,
1886 peer->ibp_nid, 0, last_alive);
1890 kiblnd_close_conn_locked (kib_conn_t *conn, int error)
1892 /* This just does the immediate housekeeping. 'error' is zero for a
1893 * normal shutdown which can happen only after the connection has been
1894 * established. If the connection is established, schedule the
1895 * connection to be finished off by the connd. Otherwise the connd is
1896 * already dealing with it (either to set it up or tear it down).
1897 * Caller holds kib_global_lock exclusively in irq context */
1898 kib_peer_t *peer = conn->ibc_peer;
1900 unsigned long flags;
1902 LASSERT (error != 0 || conn->ibc_state >= IBLND_CONN_ESTABLISHED);
1904 if (error != 0 && conn->ibc_comms_error == 0)
1905 conn->ibc_comms_error = error;
1907 if (conn->ibc_state != IBLND_CONN_ESTABLISHED)
1908 return; /* already being handled */
1911 list_empty(&conn->ibc_tx_noops) &&
1912 list_empty(&conn->ibc_tx_queue) &&
1913 list_empty(&conn->ibc_tx_queue_rsrvd) &&
1914 list_empty(&conn->ibc_tx_queue_nocred) &&
1915 list_empty(&conn->ibc_active_txs)) {
1916 CDEBUG(D_NET, "closing conn to %s\n",
1917 libcfs_nid2str(peer->ibp_nid));
1919 CNETERR("Closing conn to %s: error %d%s%s%s%s%s\n",
1920 libcfs_nid2str(peer->ibp_nid), error,
1921 list_empty(&conn->ibc_tx_queue) ? "" : "(sending)",
1922 list_empty(&conn->ibc_tx_noops) ? "" : "(sending_noops)",
1923 list_empty(&conn->ibc_tx_queue_rsrvd) ?
1924 "" : "(sending_rsrvd)",
1925 list_empty(&conn->ibc_tx_queue_nocred) ?
1926 "" : "(sending_nocred)",
1927 list_empty(&conn->ibc_active_txs) ? "" : "(waiting)");
1930 dev = ((kib_net_t *)peer->ibp_ni->ni_data)->ibn_dev;
1931 list_del(&conn->ibc_list);
1932 /* connd (see below) takes over ibc_list's ref */
1934 if (list_empty(&peer->ibp_conns) && /* no more conns */
1935 kiblnd_peer_active(peer)) { /* still in peer table */
1936 kiblnd_unlink_peer_locked(peer);
1938 /* set/clear error on last conn */
1939 peer->ibp_error = conn->ibc_comms_error;
1942 kiblnd_set_conn_state(conn, IBLND_CONN_CLOSING);
1945 kiblnd_dev_can_failover(dev)) {
1946 list_add_tail(&dev->ibd_fail_list,
1947 &kiblnd_data.kib_failed_devs);
1948 wake_up(&kiblnd_data.kib_failover_waitq);
1951 spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags);
1953 list_add_tail(&conn->ibc_list, &kiblnd_data.kib_connd_conns);
1954 wake_up(&kiblnd_data.kib_connd_waitq);
1956 spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags);
1960 kiblnd_close_conn(kib_conn_t *conn, int error)
1962 unsigned long flags;
1964 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1966 kiblnd_close_conn_locked(conn, error);
1968 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1972 kiblnd_handle_early_rxs(kib_conn_t *conn)
1974 unsigned long flags;
1977 LASSERT(!in_interrupt());
1978 LASSERT(conn->ibc_state >= IBLND_CONN_ESTABLISHED);
1980 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1981 while (!list_empty(&conn->ibc_early_rxs)) {
1982 rx = list_entry(conn->ibc_early_rxs.next,
1984 list_del(&rx->rx_list);
1985 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1987 kiblnd_handle_rx(rx);
1989 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1991 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1995 kiblnd_abort_txs(kib_conn_t *conn, struct list_head *txs)
1997 struct list_head zombies = LIST_HEAD_INIT(zombies);
1998 struct list_head *tmp;
1999 struct list_head *nxt;
2002 spin_lock(&conn->ibc_lock);
2004 list_for_each_safe(tmp, nxt, txs) {
2005 tx = list_entry(tmp, kib_tx_t, tx_list);
2007 if (txs == &conn->ibc_active_txs) {
2008 LASSERT(!tx->tx_queued);
2009 LASSERT(tx->tx_waiting ||
2010 tx->tx_sending != 0);
2012 LASSERT(tx->tx_queued);
2015 tx->tx_status = -ECONNABORTED;
2018 if (tx->tx_sending == 0) {
2020 list_del(&tx->tx_list);
2021 list_add(&tx->tx_list, &zombies);
2025 spin_unlock(&conn->ibc_lock);
2027 kiblnd_txlist_done(conn->ibc_peer->ibp_ni, &zombies, -ECONNABORTED);
2031 kiblnd_finalise_conn (kib_conn_t *conn)
2033 LASSERT (!in_interrupt());
2034 LASSERT (conn->ibc_state > IBLND_CONN_INIT);
2036 kiblnd_set_conn_state(conn, IBLND_CONN_DISCONNECTED);
2038 /* abort_receives moves QP state to IB_QPS_ERR. This is only required
2039 * for connections that didn't get as far as being connected, because
2040 * rdma_disconnect() does this for free. */
2041 kiblnd_abort_receives(conn);
2043 /* Complete all tx descs not waiting for sends to complete.
2044 * NB we should be safe from RDMA now that the QP has changed state */
2046 kiblnd_abort_txs(conn, &conn->ibc_tx_noops);
2047 kiblnd_abort_txs(conn, &conn->ibc_tx_queue);
2048 kiblnd_abort_txs(conn, &conn->ibc_tx_queue_rsrvd);
2049 kiblnd_abort_txs(conn, &conn->ibc_tx_queue_nocred);
2050 kiblnd_abort_txs(conn, &conn->ibc_active_txs);
2052 kiblnd_handle_early_rxs(conn);
2056 kiblnd_peer_connect_failed(kib_peer_t *peer, int active, int error)
2058 struct list_head zombies = LIST_HEAD_INIT(zombies);
2059 unsigned long flags;
2061 LASSERT (error != 0);
2062 LASSERT (!in_interrupt());
2064 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2067 LASSERT (peer->ibp_connecting > 0);
2068 peer->ibp_connecting--;
2070 LASSERT (peer->ibp_accepting > 0);
2071 peer->ibp_accepting--;
2074 if (kiblnd_peer_connecting(peer)) {
2075 /* another connection attempt under way... */
2076 write_unlock_irqrestore(&kiblnd_data.kib_global_lock,
2081 peer->ibp_reconnected = 0;
2082 if (list_empty(&peer->ibp_conns)) {
2083 /* Take peer's blocked transmits to complete with error */
2084 list_add(&zombies, &peer->ibp_tx_queue);
2085 list_del_init(&peer->ibp_tx_queue);
2087 if (kiblnd_peer_active(peer))
2088 kiblnd_unlink_peer_locked(peer);
2090 peer->ibp_error = error;
2092 /* Can't have blocked transmits if there are connections */
2093 LASSERT(list_empty(&peer->ibp_tx_queue));
2096 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2098 kiblnd_peer_notify(peer);
2100 if (list_empty(&zombies))
2103 CNETERR("Deleting messages for %s: connection failed\n",
2104 libcfs_nid2str(peer->ibp_nid));
2106 kiblnd_txlist_done(peer->ibp_ni, &zombies, -EHOSTUNREACH);
2110 kiblnd_connreq_done(kib_conn_t *conn, int status)
2112 kib_peer_t *peer = conn->ibc_peer;
2114 struct list_head txs;
2115 unsigned long flags;
2118 active = (conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT);
2120 CDEBUG(D_NET,"%s: active(%d), version(%x), status(%d)\n",
2121 libcfs_nid2str(peer->ibp_nid), active,
2122 conn->ibc_version, status);
2124 LASSERT (!in_interrupt());
2125 LASSERT ((conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT &&
2126 peer->ibp_connecting > 0) ||
2127 (conn->ibc_state == IBLND_CONN_PASSIVE_WAIT &&
2128 peer->ibp_accepting > 0));
2130 LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars));
2131 conn->ibc_connvars = NULL;
2134 /* failed to establish connection */
2135 kiblnd_peer_connect_failed(peer, active, status);
2136 kiblnd_finalise_conn(conn);
2140 /* connection established */
2141 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2143 conn->ibc_last_send = jiffies;
2144 kiblnd_set_conn_state(conn, IBLND_CONN_ESTABLISHED);
2145 kiblnd_peer_alive(peer);
2147 /* Add conn to peer's list and nuke any dangling conns from a different
2148 * peer instance... */
2149 kiblnd_conn_addref(conn); /* +1 ref for ibc_list */
2150 list_add(&conn->ibc_list, &peer->ibp_conns);
2151 peer->ibp_reconnected = 0;
2153 peer->ibp_connecting--;
2155 peer->ibp_accepting--;
2157 if (peer->ibp_version == 0) {
2158 peer->ibp_version = conn->ibc_version;
2159 peer->ibp_incarnation = conn->ibc_incarnation;
2162 if (peer->ibp_version != conn->ibc_version ||
2163 peer->ibp_incarnation != conn->ibc_incarnation) {
2164 kiblnd_close_stale_conns_locked(peer, conn->ibc_version,
2165 conn->ibc_incarnation);
2166 peer->ibp_version = conn->ibc_version;
2167 peer->ibp_incarnation = conn->ibc_incarnation;
2170 /* grab pending txs while I have the lock */
2171 list_add(&txs, &peer->ibp_tx_queue);
2172 list_del_init(&peer->ibp_tx_queue);
2174 if (!kiblnd_peer_active(peer) || /* peer has been deleted */
2175 conn->ibc_comms_error != 0) { /* error has happened already */
2176 lnet_ni_t *ni = peer->ibp_ni;
2178 /* start to shut down connection */
2179 kiblnd_close_conn_locked(conn, -ECONNABORTED);
2180 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2182 kiblnd_txlist_done(ni, &txs, -ECONNABORTED);
2187 /* refcount taken by cmid is not reliable after I released the glock
2188 * because this connection is visible to other threads now, another
2189 * thread can find and close this connection right after I released
2190 * the glock, if kiblnd_cm_callback for RDMA_CM_EVENT_DISCONNECTED is
2191 * called, it can release the connection refcount taken by cmid.
2192 * It means the connection could be destroyed before I finish my
2195 kiblnd_conn_addref(conn);
2196 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2198 /* Schedule blocked txs */
2199 spin_lock(&conn->ibc_lock);
2200 while (!list_empty(&txs)) {
2201 tx = list_entry(txs.next, kib_tx_t, tx_list);
2202 list_del(&tx->tx_list);
2204 kiblnd_queue_tx_locked(tx, conn);
2206 spin_unlock(&conn->ibc_lock);
2208 kiblnd_check_sends(conn);
2210 /* schedule blocked rxs */
2211 kiblnd_handle_early_rxs(conn);
2213 kiblnd_conn_decref(conn);
2217 kiblnd_reject(struct rdma_cm_id *cmid, kib_rej_t *rej)
2221 rc = rdma_reject(cmid, rej, sizeof(*rej));
2224 CWARN("Error %d sending reject\n", rc);
2228 kiblnd_passive_connect(struct rdma_cm_id *cmid, void *priv, int priv_nob)
2230 rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
2231 kib_msg_t *reqmsg = priv;
2237 lnet_ni_t *ni = NULL;
2238 kib_net_t *net = NULL;
2240 struct rdma_conn_param cp;
2242 int version = IBLND_MSG_VERSION;
2243 unsigned long flags;
2245 struct sockaddr_in *peer_addr;
2246 LASSERT (!in_interrupt());
2248 /* cmid inherits 'context' from the corresponding listener id */
2249 ibdev = (kib_dev_t *)cmid->context;
2250 LASSERT (ibdev != NULL);
2252 memset(&rej, 0, sizeof(rej));
2253 rej.ibr_magic = IBLND_MSG_MAGIC;
2254 rej.ibr_why = IBLND_REJECT_FATAL;
2255 rej.ibr_cp.ibcp_max_msg_size = IBLND_MSG_SIZE;
2257 peer_addr = (struct sockaddr_in *)&(cmid->route.addr.dst_addr);
2258 if (*kiblnd_tunables.kib_require_priv_port &&
2259 ntohs(peer_addr->sin_port) >= PROT_SOCK) {
2260 __u32 ip = ntohl(peer_addr->sin_addr.s_addr);
2261 CERROR("Peer's port (%pI4h:%hu) is not privileged\n",
2262 &ip, ntohs(peer_addr->sin_port));
2266 if (priv_nob < offsetof(kib_msg_t, ibm_type)) {
2267 CERROR("Short connection request\n");
2271 /* Future protocol version compatibility support! If the
2272 * o2iblnd-specific protocol changes, or when LNET unifies
2273 * protocols over all LNDs, the initial connection will
2274 * negotiate a protocol version. I trap this here to avoid
2275 * console errors; the reject tells the peer which protocol I
2277 if (reqmsg->ibm_magic == LNET_PROTO_MAGIC ||
2278 reqmsg->ibm_magic == __swab32(LNET_PROTO_MAGIC))
2280 if (reqmsg->ibm_magic == IBLND_MSG_MAGIC &&
2281 reqmsg->ibm_version != IBLND_MSG_VERSION &&
2282 reqmsg->ibm_version != IBLND_MSG_VERSION_1)
2284 if (reqmsg->ibm_magic == __swab32(IBLND_MSG_MAGIC) &&
2285 reqmsg->ibm_version != __swab16(IBLND_MSG_VERSION) &&
2286 reqmsg->ibm_version != __swab16(IBLND_MSG_VERSION_1))
2289 rc = kiblnd_unpack_msg(reqmsg, priv_nob);
2291 CERROR("Can't parse connection request: %d\n", rc);
2295 nid = reqmsg->ibm_srcnid;
2296 ni = lnet_net2ni(LNET_NIDNET(reqmsg->ibm_dstnid));
2299 net = (kib_net_t *)ni->ni_data;
2300 rej.ibr_incarnation = net->ibn_incarnation;
2303 if (ni == NULL || /* no matching net */
2304 ni->ni_nid != reqmsg->ibm_dstnid || /* right NET, wrong NID! */
2305 net->ibn_dev != ibdev) { /* wrong device */
2306 CERROR("Can't accept conn from %s on %s (%s:%d:%pI4h): "
2307 "bad dst nid %s\n", libcfs_nid2str(nid),
2308 ni == NULL ? "NA" : libcfs_nid2str(ni->ni_nid),
2309 ibdev->ibd_ifname, ibdev->ibd_nnets,
2311 libcfs_nid2str(reqmsg->ibm_dstnid));
2316 /* check time stamp as soon as possible */
2317 if (reqmsg->ibm_dststamp != 0 &&
2318 reqmsg->ibm_dststamp != net->ibn_incarnation) {
2319 CWARN("Stale connection request\n");
2320 rej.ibr_why = IBLND_REJECT_CONN_STALE;
2324 /* I can accept peer's version */
2325 version = reqmsg->ibm_version;
2327 if (reqmsg->ibm_type != IBLND_MSG_CONNREQ) {
2328 CERROR("Unexpected connreq msg type: %x from %s\n",
2329 reqmsg->ibm_type, libcfs_nid2str(nid));
2333 if (reqmsg->ibm_u.connparams.ibcp_queue_depth >
2334 kiblnd_msg_queue_size(version, ni)) {
2335 CERROR("Can't accept conn from %s, queue depth too large: "
2336 " %d (<=%d wanted)\n",
2337 libcfs_nid2str(nid),
2338 reqmsg->ibm_u.connparams.ibcp_queue_depth,
2339 kiblnd_msg_queue_size(version, ni));
2341 if (version == IBLND_MSG_VERSION)
2342 rej.ibr_why = IBLND_REJECT_MSG_QUEUE_SIZE;
2347 if (reqmsg->ibm_u.connparams.ibcp_max_frags >
2348 kiblnd_rdma_frags(version, ni)) {
2349 CWARN("Can't accept conn from %s (version %x): "
2350 "max_frags %d too large (%d wanted)\n",
2351 libcfs_nid2str(nid), version,
2352 reqmsg->ibm_u.connparams.ibcp_max_frags,
2353 kiblnd_rdma_frags(version, ni));
2355 if (version >= IBLND_MSG_VERSION)
2356 rej.ibr_why = IBLND_REJECT_RDMA_FRAGS;
2359 } else if (reqmsg->ibm_u.connparams.ibcp_max_frags <
2360 kiblnd_rdma_frags(version, ni) &&
2361 net->ibn_fmr_ps == NULL) {
2362 CWARN("Can't accept conn from %s (version %x): "
2363 "max_frags %d incompatible without FMR pool "
2365 libcfs_nid2str(nid), version,
2366 reqmsg->ibm_u.connparams.ibcp_max_frags,
2367 kiblnd_rdma_frags(version, ni));
2369 if (version == IBLND_MSG_VERSION)
2370 rej.ibr_why = IBLND_REJECT_RDMA_FRAGS;
2375 if (reqmsg->ibm_u.connparams.ibcp_max_msg_size > IBLND_MSG_SIZE) {
2376 CERROR("Can't accept %s: message size %d too big (%d max)\n",
2377 libcfs_nid2str(nid),
2378 reqmsg->ibm_u.connparams.ibcp_max_msg_size,
2383 /* assume 'nid' is a new peer; create */
2384 rc = kiblnd_create_peer(ni, &peer, nid);
2386 CERROR("Can't create peer for %s\n", libcfs_nid2str(nid));
2387 rej.ibr_why = IBLND_REJECT_NO_RESOURCES;
2391 /* We have validated the peer's parameters so use those */
2392 peer->ibp_max_frags = reqmsg->ibm_u.connparams.ibcp_max_frags;
2393 peer->ibp_queue_depth = reqmsg->ibm_u.connparams.ibcp_queue_depth;
2395 write_lock_irqsave(g_lock, flags);
2397 peer2 = kiblnd_find_peer_locked(nid);
2398 if (peer2 != NULL) {
2399 if (peer2->ibp_version == 0) {
2400 peer2->ibp_version = version;
2401 peer2->ibp_incarnation = reqmsg->ibm_srcstamp;
2404 /* not the guy I've talked with */
2405 if (peer2->ibp_incarnation != reqmsg->ibm_srcstamp ||
2406 peer2->ibp_version != version) {
2407 kiblnd_close_peer_conns_locked(peer2, -ESTALE);
2409 if (kiblnd_peer_active(peer2)) {
2410 peer2->ibp_incarnation = reqmsg->ibm_srcstamp;
2411 peer2->ibp_version = version;
2413 write_unlock_irqrestore(g_lock, flags);
2415 CWARN("Conn stale %s version %x/%x incarnation "LPU64"/"LPU64"\n",
2416 libcfs_nid2str(nid), peer2->ibp_version, version,
2417 peer2->ibp_incarnation, reqmsg->ibm_srcstamp);
2419 kiblnd_peer_decref(peer);
2420 rej.ibr_why = IBLND_REJECT_CONN_STALE;
2424 /* tie-break connection race in favour of the higher NID */
2425 if (peer2->ibp_connecting != 0 &&
2427 write_unlock_irqrestore(g_lock, flags);
2429 CWARN("Conn race %s\n", libcfs_nid2str(peer2->ibp_nid));
2431 kiblnd_peer_decref(peer);
2432 rej.ibr_why = IBLND_REJECT_CONN_RACE;
2436 * passive connection is allowed even this peer is waiting for
2439 peer2->ibp_reconnecting = 0;
2440 peer2->ibp_accepting++;
2441 kiblnd_peer_addref(peer2);
2443 /* Race with kiblnd_launch_tx (active connect) to create peer
2444 * so copy validated parameters since we now know what the
2445 * peer's limits are */
2446 peer2->ibp_max_frags = peer->ibp_max_frags;
2447 peer2->ibp_queue_depth = peer->ibp_queue_depth;
2449 write_unlock_irqrestore(g_lock, flags);
2450 kiblnd_peer_decref(peer);
2453 /* Brand new peer */
2454 LASSERT (peer->ibp_accepting == 0);
2455 LASSERT (peer->ibp_version == 0 &&
2456 peer->ibp_incarnation == 0);
2458 peer->ibp_accepting = 1;
2459 peer->ibp_version = version;
2460 peer->ibp_incarnation = reqmsg->ibm_srcstamp;
2462 /* I have a ref on ni that prevents it being shutdown */
2463 LASSERT (net->ibn_shutdown == 0);
2465 kiblnd_peer_addref(peer);
2466 list_add_tail(&peer->ibp_list, kiblnd_nid2peerlist(nid));
2468 write_unlock_irqrestore(g_lock, flags);
2471 conn = kiblnd_create_conn(peer, cmid, IBLND_CONN_PASSIVE_WAIT, version);
2473 kiblnd_peer_connect_failed(peer, 0, -ENOMEM);
2474 kiblnd_peer_decref(peer);
2475 rej.ibr_why = IBLND_REJECT_NO_RESOURCES;
2479 /* conn now "owns" cmid, so I return success from here on to ensure the
2480 * CM callback doesn't destroy cmid. */
2481 conn->ibc_incarnation = reqmsg->ibm_srcstamp;
2482 conn->ibc_credits = conn->ibc_queue_depth;
2483 conn->ibc_reserved_credits = conn->ibc_queue_depth;
2484 LASSERT(conn->ibc_credits + conn->ibc_reserved_credits +
2485 IBLND_OOB_MSGS(version) <= IBLND_RX_MSGS(conn));
2487 ackmsg = &conn->ibc_connvars->cv_msg;
2488 memset(ackmsg, 0, sizeof(*ackmsg));
2490 kiblnd_init_msg(ackmsg, IBLND_MSG_CONNACK,
2491 sizeof(ackmsg->ibm_u.connparams));
2492 ackmsg->ibm_u.connparams.ibcp_queue_depth = conn->ibc_queue_depth;
2493 ackmsg->ibm_u.connparams.ibcp_max_frags = conn->ibc_max_frags;
2494 ackmsg->ibm_u.connparams.ibcp_max_msg_size = IBLND_MSG_SIZE;
2496 kiblnd_pack_msg(ni, ackmsg, version, 0, nid, reqmsg->ibm_srcstamp);
2498 memset(&cp, 0, sizeof(cp));
2499 cp.private_data = ackmsg;
2500 cp.private_data_len = ackmsg->ibm_nob;
2501 cp.responder_resources = 0; /* No atomic ops or RDMA reads */
2502 cp.initiator_depth = 0;
2503 cp.flow_control = 1;
2504 cp.retry_count = *kiblnd_tunables.kib_retry_count;
2505 cp.rnr_retry_count = *kiblnd_tunables.kib_rnr_retry_count;
2507 CDEBUG(D_NET, "Accept %s\n", libcfs_nid2str(nid));
2509 rc = rdma_accept(cmid, &cp);
2511 CERROR("Can't accept %s: %d\n", libcfs_nid2str(nid), rc);
2512 rej.ibr_version = version;
2513 rej.ibr_why = IBLND_REJECT_FATAL;
2515 kiblnd_reject(cmid, &rej);
2516 kiblnd_connreq_done(conn, rc);
2517 kiblnd_conn_decref(conn);
2526 rej.ibr_cp.ibcp_queue_depth =
2527 kiblnd_msg_queue_size(version, ni);
2528 rej.ibr_cp.ibcp_max_frags = kiblnd_rdma_frags(version, ni);
2531 rej.ibr_version = version;
2532 kiblnd_reject(cmid, &rej);
2534 return -ECONNREFUSED;
2538 kiblnd_check_reconnect(kib_conn_t *conn, int version,
2539 __u64 incarnation, int why, kib_connparams_t *cp)
2541 rwlock_t *glock = &kiblnd_data.kib_global_lock;
2542 kib_peer_t *peer = conn->ibc_peer;
2544 int msg_size = IBLND_MSG_SIZE;
2548 unsigned long flags;
2550 LASSERT(conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT);
2551 LASSERT(peer->ibp_connecting > 0); /* 'conn' at least */
2552 LASSERT(!peer->ibp_reconnecting);
2555 msg_size = cp->ibcp_max_msg_size;
2556 frag_num = cp->ibcp_max_frags;
2557 queue_dep = cp->ibcp_queue_depth;
2560 write_lock_irqsave(glock, flags);
2561 /* retry connection if it's still needed and no other connection
2562 * attempts (active or passive) are in progress
2563 * NB: reconnect is still needed even when ibp_tx_queue is
2564 * empty if ibp_version != version because reconnect may be
2565 * initiated by kiblnd_query() */
2566 reconnect = (!list_empty(&peer->ibp_tx_queue) ||
2567 peer->ibp_version != version) &&
2568 peer->ibp_connecting == 1 &&
2569 peer->ibp_accepting == 0;
2580 case IBLND_REJECT_RDMA_FRAGS: {
2581 struct lnet_ioctl_config_lnd_tunables *tunables;
2584 reason = "can't negotiate max frags";
2587 tunables = peer->ibp_ni->ni_lnd_tunables;
2588 if (!tunables->lt_tun_u.lt_o2ib.lnd_map_on_demand) {
2589 reason = "map_on_demand must be enabled";
2592 if (conn->ibc_max_frags <= frag_num) {
2593 reason = "unsupported max frags";
2597 peer->ibp_max_frags = frag_num;
2598 reason = "rdma fragments";
2601 case IBLND_REJECT_MSG_QUEUE_SIZE:
2603 reason = "can't negotiate queue depth";
2606 if (conn->ibc_queue_depth <= queue_dep) {
2607 reason = "unsupported queue depth";
2611 peer->ibp_queue_depth = queue_dep;
2612 reason = "queue depth";
2615 case IBLND_REJECT_CONN_STALE:
2619 case IBLND_REJECT_CONN_RACE:
2620 reason = "conn race";
2623 case IBLND_REJECT_CONN_UNCOMPAT:
2624 reason = "version negotiation";
2628 conn->ibc_reconnect = 1;
2629 peer->ibp_reconnecting = 1;
2630 peer->ibp_version = version;
2631 if (incarnation != 0)
2632 peer->ibp_incarnation = incarnation;
2634 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2636 CNETERR("%s: %s (%s), %x, %x, msg_size: %d, queue_depth: %d/%d, max_frags: %d/%d\n",
2637 libcfs_nid2str(peer->ibp_nid),
2638 reconnect ? "reconnect" : "don't reconnect",
2639 reason, IBLND_MSG_VERSION, version, msg_size,
2640 conn->ibc_queue_depth, queue_dep,
2641 conn->ibc_max_frags, frag_num);
2643 * if conn::ibc_reconnect is TRUE, connd will reconnect to the peer
2644 * while destroying the zombie
2649 kiblnd_rejected (kib_conn_t *conn, int reason, void *priv, int priv_nob)
2651 kib_peer_t *peer = conn->ibc_peer;
2653 LASSERT (!in_interrupt());
2654 LASSERT (conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT);
2657 case IB_CM_REJ_STALE_CONN:
2658 kiblnd_check_reconnect(conn, IBLND_MSG_VERSION, 0,
2659 IBLND_REJECT_CONN_STALE, NULL);
2662 case IB_CM_REJ_INVALID_SERVICE_ID:
2663 CNETERR("%s rejected: no listener at %d\n",
2664 libcfs_nid2str(peer->ibp_nid),
2665 *kiblnd_tunables.kib_service);
2668 case IB_CM_REJ_CONSUMER_DEFINED:
2669 if (priv_nob >= offsetof(kib_rej_t, ibr_padding)) {
2670 kib_rej_t *rej = priv;
2671 kib_connparams_t *cp = NULL;
2673 __u64 incarnation = -1;
2675 /* NB. default incarnation is -1 because:
2676 * a) V1 will ignore dst incarnation in connreq.
2677 * b) V2 will provide incarnation while rejecting me,
2678 * -1 will be overwrote.
2680 * if I try to connect to a V1 peer with V2 protocol,
2681 * it rejected me then upgrade to V2, I have no idea
2682 * about the upgrading and try to reconnect with V1,
2683 * in this case upgraded V2 can find out I'm trying to
2684 * talk to the old guy and reject me(incarnation is -1).
2687 if (rej->ibr_magic == __swab32(IBLND_MSG_MAGIC) ||
2688 rej->ibr_magic == __swab32(LNET_PROTO_MAGIC)) {
2689 __swab32s(&rej->ibr_magic);
2690 __swab16s(&rej->ibr_version);
2694 if (priv_nob >= sizeof(kib_rej_t) &&
2695 rej->ibr_version > IBLND_MSG_VERSION_1) {
2696 /* priv_nob is always 148 in current version
2697 * of OFED, so we still need to check version.
2698 * (define of IB_CM_REJ_PRIVATE_DATA_SIZE) */
2702 __swab64s(&rej->ibr_incarnation);
2703 __swab16s(&cp->ibcp_queue_depth);
2704 __swab16s(&cp->ibcp_max_frags);
2705 __swab32s(&cp->ibcp_max_msg_size);
2708 incarnation = rej->ibr_incarnation;
2711 if (rej->ibr_magic != IBLND_MSG_MAGIC &&
2712 rej->ibr_magic != LNET_PROTO_MAGIC) {
2713 CERROR("%s rejected: consumer defined fatal error\n",
2714 libcfs_nid2str(peer->ibp_nid));
2718 if (rej->ibr_version != IBLND_MSG_VERSION &&
2719 rej->ibr_version != IBLND_MSG_VERSION_1) {
2720 CERROR("%s rejected: o2iblnd version %x error\n",
2721 libcfs_nid2str(peer->ibp_nid),
2726 if (rej->ibr_why == IBLND_REJECT_FATAL &&
2727 rej->ibr_version == IBLND_MSG_VERSION_1) {
2728 CDEBUG(D_NET, "rejected by old version peer %s: %x\n",
2729 libcfs_nid2str(peer->ibp_nid), rej->ibr_version);
2731 if (conn->ibc_version != IBLND_MSG_VERSION_1)
2732 rej->ibr_why = IBLND_REJECT_CONN_UNCOMPAT;
2735 switch (rej->ibr_why) {
2736 case IBLND_REJECT_CONN_RACE:
2737 case IBLND_REJECT_CONN_STALE:
2738 case IBLND_REJECT_CONN_UNCOMPAT:
2739 case IBLND_REJECT_MSG_QUEUE_SIZE:
2740 case IBLND_REJECT_RDMA_FRAGS:
2741 kiblnd_check_reconnect(conn, rej->ibr_version,
2742 incarnation, rej->ibr_why, cp);
2745 case IBLND_REJECT_NO_RESOURCES:
2746 CERROR("%s rejected: o2iblnd no resources\n",
2747 libcfs_nid2str(peer->ibp_nid));
2750 case IBLND_REJECT_FATAL:
2751 CERROR("%s rejected: o2iblnd fatal error\n",
2752 libcfs_nid2str(peer->ibp_nid));
2756 CERROR("%s rejected: o2iblnd reason %d\n",
2757 libcfs_nid2str(peer->ibp_nid),
2765 CNETERR("%s rejected: reason %d, size %d\n",
2766 libcfs_nid2str(peer->ibp_nid), reason, priv_nob);
2770 kiblnd_connreq_done(conn, -ECONNREFUSED);
2774 kiblnd_check_connreply (kib_conn_t *conn, void *priv, int priv_nob)
2776 kib_peer_t *peer = conn->ibc_peer;
2777 lnet_ni_t *ni = peer->ibp_ni;
2778 kib_net_t *net = ni->ni_data;
2779 kib_msg_t *msg = priv;
2780 int ver = conn->ibc_version;
2781 int rc = kiblnd_unpack_msg(msg, priv_nob);
2782 unsigned long flags;
2784 LASSERT (net != NULL);
2787 CERROR("Can't unpack connack from %s: %d\n",
2788 libcfs_nid2str(peer->ibp_nid), rc);
2792 if (msg->ibm_type != IBLND_MSG_CONNACK) {
2793 CERROR("Unexpected message %d from %s\n",
2794 msg->ibm_type, libcfs_nid2str(peer->ibp_nid));
2799 if (ver != msg->ibm_version) {
2800 CERROR("%s replied version %x is different with "
2801 "requested version %x\n",
2802 libcfs_nid2str(peer->ibp_nid), msg->ibm_version, ver);
2807 if (msg->ibm_u.connparams.ibcp_queue_depth >
2808 conn->ibc_queue_depth) {
2809 CERROR("%s has incompatible queue depth %d (<=%d wanted)\n",
2810 libcfs_nid2str(peer->ibp_nid),
2811 msg->ibm_u.connparams.ibcp_queue_depth,
2812 conn->ibc_queue_depth);
2817 if (msg->ibm_u.connparams.ibcp_max_frags >
2818 conn->ibc_max_frags) {
2819 CERROR("%s has incompatible max_frags %d (<=%d wanted)\n",
2820 libcfs_nid2str(peer->ibp_nid),
2821 msg->ibm_u.connparams.ibcp_max_frags,
2822 conn->ibc_max_frags);
2827 if (msg->ibm_u.connparams.ibcp_max_msg_size > IBLND_MSG_SIZE) {
2828 CERROR("%s max message size %d too big (%d max)\n",
2829 libcfs_nid2str(peer->ibp_nid),
2830 msg->ibm_u.connparams.ibcp_max_msg_size,
2836 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2837 if (msg->ibm_dstnid == ni->ni_nid &&
2838 msg->ibm_dststamp == net->ibn_incarnation)
2842 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2845 CERROR("Bad connection reply from %s, rc = %d, "
2846 "version: %x max_frags: %d\n",
2847 libcfs_nid2str(peer->ibp_nid), rc,
2848 msg->ibm_version, msg->ibm_u.connparams.ibcp_max_frags);
2852 conn->ibc_incarnation = msg->ibm_srcstamp;
2853 conn->ibc_credits = msg->ibm_u.connparams.ibcp_queue_depth;
2854 conn->ibc_reserved_credits = msg->ibm_u.connparams.ibcp_queue_depth;
2855 conn->ibc_queue_depth = msg->ibm_u.connparams.ibcp_queue_depth;
2856 conn->ibc_max_frags = msg->ibm_u.connparams.ibcp_max_frags;
2857 LASSERT(conn->ibc_credits + conn->ibc_reserved_credits +
2858 IBLND_OOB_MSGS(ver) <= IBLND_RX_MSGS(conn));
2860 kiblnd_connreq_done(conn, 0);
2864 /* NB My QP has already established itself, so I handle anything going
2865 * wrong here by setting ibc_comms_error.
2866 * kiblnd_connreq_done(0) moves the conn state to ESTABLISHED, but then
2867 * immediately tears it down. */
2870 conn->ibc_comms_error = rc;
2871 kiblnd_connreq_done(conn, 0);
2875 kiblnd_active_connect (struct rdma_cm_id *cmid)
2877 kib_peer_t *peer = (kib_peer_t *)cmid->context;
2880 struct rdma_conn_param cp;
2883 unsigned long flags;
2886 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2888 incarnation = peer->ibp_incarnation;
2889 version = (peer->ibp_version == 0) ? IBLND_MSG_VERSION :
2892 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2894 conn = kiblnd_create_conn(peer, cmid, IBLND_CONN_ACTIVE_CONNECT,
2897 kiblnd_peer_connect_failed(peer, 1, -ENOMEM);
2898 kiblnd_peer_decref(peer); /* lose cmid's ref */
2902 /* conn "owns" cmid now, so I return success from here on to ensure the
2903 * CM callback doesn't destroy cmid. conn also takes over cmid's ref
2906 msg = &conn->ibc_connvars->cv_msg;
2908 memset(msg, 0, sizeof(*msg));
2909 kiblnd_init_msg(msg, IBLND_MSG_CONNREQ, sizeof(msg->ibm_u.connparams));
2910 msg->ibm_u.connparams.ibcp_queue_depth = conn->ibc_queue_depth;
2911 msg->ibm_u.connparams.ibcp_max_frags = conn->ibc_max_frags;
2912 msg->ibm_u.connparams.ibcp_max_msg_size = IBLND_MSG_SIZE;
2914 kiblnd_pack_msg(peer->ibp_ni, msg, version,
2915 0, peer->ibp_nid, incarnation);
2917 memset(&cp, 0, sizeof(cp));
2918 cp.private_data = msg;
2919 cp.private_data_len = msg->ibm_nob;
2920 cp.responder_resources = 0; /* No atomic ops or RDMA reads */
2921 cp.initiator_depth = 0;
2922 cp.flow_control = 1;
2923 cp.retry_count = *kiblnd_tunables.kib_retry_count;
2924 cp.rnr_retry_count = *kiblnd_tunables.kib_rnr_retry_count;
2926 LASSERT(cmid->context == (void *)conn);
2927 LASSERT(conn->ibc_cmid == cmid);
2929 rc = rdma_connect(cmid, &cp);
2931 CERROR("Can't connect to %s: %d\n",
2932 libcfs_nid2str(peer->ibp_nid), rc);
2933 kiblnd_connreq_done(conn, rc);
2934 kiblnd_conn_decref(conn);
2941 kiblnd_cm_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event)
2947 switch (event->event) {
2949 CERROR("Unexpected event: %d, status: %d\n",
2950 event->event, event->status);
2953 case RDMA_CM_EVENT_CONNECT_REQUEST:
2954 /* destroy cmid on failure */
2955 rc = kiblnd_passive_connect(cmid,
2956 (void *)KIBLND_CONN_PARAM(event),
2957 KIBLND_CONN_PARAM_LEN(event));
2958 CDEBUG(D_NET, "connreq: %d\n", rc);
2961 case RDMA_CM_EVENT_ADDR_ERROR:
2962 peer = (kib_peer_t *)cmid->context;
2963 CNETERR("%s: ADDR ERROR %d\n",
2964 libcfs_nid2str(peer->ibp_nid), event->status);
2965 kiblnd_peer_connect_failed(peer, 1, -EHOSTUNREACH);
2966 kiblnd_peer_decref(peer);
2967 return -EHOSTUNREACH; /* rc != 0 destroys cmid */
2969 case RDMA_CM_EVENT_ADDR_RESOLVED:
2970 peer = (kib_peer_t *)cmid->context;
2972 CDEBUG(D_NET,"%s Addr resolved: %d\n",
2973 libcfs_nid2str(peer->ibp_nid), event->status);
2975 if (event->status != 0) {
2976 CNETERR("Can't resolve address for %s: %d\n",
2977 libcfs_nid2str(peer->ibp_nid), event->status);
2980 rc = rdma_resolve_route(
2981 cmid, *kiblnd_tunables.kib_timeout * 1000);
2984 /* Can't initiate route resolution */
2985 CERROR("Can't resolve route for %s: %d\n",
2986 libcfs_nid2str(peer->ibp_nid), rc);
2988 kiblnd_peer_connect_failed(peer, 1, rc);
2989 kiblnd_peer_decref(peer);
2990 return rc; /* rc != 0 destroys cmid */
2992 case RDMA_CM_EVENT_ROUTE_ERROR:
2993 peer = (kib_peer_t *)cmid->context;
2994 CNETERR("%s: ROUTE ERROR %d\n",
2995 libcfs_nid2str(peer->ibp_nid), event->status);
2996 kiblnd_peer_connect_failed(peer, 1, -EHOSTUNREACH);
2997 kiblnd_peer_decref(peer);
2998 return -EHOSTUNREACH; /* rc != 0 destroys cmid */
3000 case RDMA_CM_EVENT_ROUTE_RESOLVED:
3001 peer = (kib_peer_t *)cmid->context;
3002 CDEBUG(D_NET,"%s Route resolved: %d\n",
3003 libcfs_nid2str(peer->ibp_nid), event->status);
3005 if (event->status == 0)
3006 return kiblnd_active_connect(cmid);
3008 CNETERR("Can't resolve route for %s: %d\n",
3009 libcfs_nid2str(peer->ibp_nid), event->status);
3010 kiblnd_peer_connect_failed(peer, 1, event->status);
3011 kiblnd_peer_decref(peer);
3012 return event->status; /* rc != 0 destroys cmid */
3014 case RDMA_CM_EVENT_UNREACHABLE:
3015 conn = (kib_conn_t *)cmid->context;
3016 LASSERT(conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT ||
3017 conn->ibc_state == IBLND_CONN_PASSIVE_WAIT);
3018 CNETERR("%s: UNREACHABLE %d\n",
3019 libcfs_nid2str(conn->ibc_peer->ibp_nid), event->status);
3020 kiblnd_connreq_done(conn, -ENETDOWN);
3021 kiblnd_conn_decref(conn);
3024 case RDMA_CM_EVENT_CONNECT_ERROR:
3025 conn = (kib_conn_t *)cmid->context;
3026 LASSERT(conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT ||
3027 conn->ibc_state == IBLND_CONN_PASSIVE_WAIT);
3028 CNETERR("%s: CONNECT ERROR %d\n",
3029 libcfs_nid2str(conn->ibc_peer->ibp_nid), event->status);
3030 kiblnd_connreq_done(conn, -ENOTCONN);
3031 kiblnd_conn_decref(conn);
3034 case RDMA_CM_EVENT_REJECTED:
3035 conn = (kib_conn_t *)cmid->context;
3036 switch (conn->ibc_state) {
3040 case IBLND_CONN_PASSIVE_WAIT:
3041 CERROR ("%s: REJECTED %d\n",
3042 libcfs_nid2str(conn->ibc_peer->ibp_nid),
3044 kiblnd_connreq_done(conn, -ECONNRESET);
3047 case IBLND_CONN_ACTIVE_CONNECT:
3048 kiblnd_rejected(conn, event->status,
3049 (void *)KIBLND_CONN_PARAM(event),
3050 KIBLND_CONN_PARAM_LEN(event));
3053 kiblnd_conn_decref(conn);
3056 case RDMA_CM_EVENT_ESTABLISHED:
3057 conn = (kib_conn_t *)cmid->context;
3058 switch (conn->ibc_state) {
3062 case IBLND_CONN_PASSIVE_WAIT:
3063 CDEBUG(D_NET, "ESTABLISHED (passive): %s\n",
3064 libcfs_nid2str(conn->ibc_peer->ibp_nid));
3065 kiblnd_connreq_done(conn, 0);
3068 case IBLND_CONN_ACTIVE_CONNECT:
3069 CDEBUG(D_NET, "ESTABLISHED(active): %s\n",
3070 libcfs_nid2str(conn->ibc_peer->ibp_nid));
3071 kiblnd_check_connreply(conn,
3072 (void *)KIBLND_CONN_PARAM(event),
3073 KIBLND_CONN_PARAM_LEN(event));
3076 /* net keeps its ref on conn! */
3079 case RDMA_CM_EVENT_TIMEWAIT_EXIT:
3080 CDEBUG(D_NET, "Ignore TIMEWAIT_EXIT event\n");
3083 case RDMA_CM_EVENT_DISCONNECTED:
3084 conn = (kib_conn_t *)cmid->context;
3085 if (conn->ibc_state < IBLND_CONN_ESTABLISHED) {
3086 CERROR("%s DISCONNECTED\n",
3087 libcfs_nid2str(conn->ibc_peer->ibp_nid));
3088 kiblnd_connreq_done(conn, -ECONNRESET);
3090 kiblnd_close_conn(conn, 0);
3092 kiblnd_conn_decref(conn);
3093 cmid->context = NULL;
3096 case RDMA_CM_EVENT_DEVICE_REMOVAL:
3097 LCONSOLE_ERROR_MSG(0x131,
3098 "Received notification of device removal\n"
3099 "Please shutdown LNET to allow this to proceed\n");
3100 /* Can't remove network from underneath LNET for now, so I have
3104 case RDMA_CM_EVENT_ADDR_CHANGE:
3105 LCONSOLE_INFO("Physical link changed (eg hca/port)\n");
3111 kiblnd_check_txs_locked(kib_conn_t *conn, struct list_head *txs)
3114 struct list_head *ttmp;
3116 list_for_each(ttmp, txs) {
3117 tx = list_entry(ttmp, kib_tx_t, tx_list);
3119 if (txs != &conn->ibc_active_txs) {
3120 LASSERT(tx->tx_queued);
3122 LASSERT(!tx->tx_queued);
3123 LASSERT(tx->tx_waiting || tx->tx_sending != 0);
3126 if (cfs_time_aftereq(jiffies, tx->tx_deadline)) {
3127 CERROR("Timed out tx: %s, %lu seconds\n",
3128 kiblnd_queue2str(conn, txs),
3129 cfs_duration_sec(jiffies - tx->tx_deadline));
3138 kiblnd_conn_timed_out_locked(kib_conn_t *conn)
3140 return kiblnd_check_txs_locked(conn, &conn->ibc_tx_queue) ||
3141 kiblnd_check_txs_locked(conn, &conn->ibc_tx_noops) ||
3142 kiblnd_check_txs_locked(conn, &conn->ibc_tx_queue_rsrvd) ||
3143 kiblnd_check_txs_locked(conn, &conn->ibc_tx_queue_nocred) ||
3144 kiblnd_check_txs_locked(conn, &conn->ibc_active_txs);
3148 kiblnd_check_conns (int idx)
3150 struct list_head closes = LIST_HEAD_INIT(closes);
3151 struct list_head checksends = LIST_HEAD_INIT(checksends);
3152 struct list_head *peers = &kiblnd_data.kib_peers[idx];
3153 struct list_head *ptmp;
3156 struct list_head *ctmp;
3157 unsigned long flags;
3159 /* NB. We expect to have a look at all the peers and not find any
3160 * RDMAs to time out, so we just use a shared lock while we
3162 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
3164 list_for_each(ptmp, peers) {
3165 peer = list_entry(ptmp, kib_peer_t, ibp_list);
3167 list_for_each(ctmp, &peer->ibp_conns) {
3171 conn = list_entry(ctmp, kib_conn_t, ibc_list);
3173 LASSERT(conn->ibc_state == IBLND_CONN_ESTABLISHED);
3175 spin_lock(&conn->ibc_lock);
3177 sendnoop = kiblnd_need_noop(conn);
3178 timedout = kiblnd_conn_timed_out_locked(conn);
3179 if (!sendnoop && !timedout) {
3180 spin_unlock(&conn->ibc_lock);
3185 CERROR("Timed out RDMA with %s (%lu): "
3186 "c: %u, oc: %u, rc: %u\n",
3187 libcfs_nid2str(peer->ibp_nid),
3188 cfs_duration_sec(cfs_time_current() -
3189 peer->ibp_last_alive),
3191 conn->ibc_outstanding_credits,
3192 conn->ibc_reserved_credits);
3193 list_add(&conn->ibc_connd_list, &closes);
3195 list_add(&conn->ibc_connd_list, &checksends);
3197 /* +ref for 'closes' or 'checksends' */
3198 kiblnd_conn_addref(conn);
3200 spin_unlock(&conn->ibc_lock);
3204 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
3206 /* Handle timeout by closing the whole
3207 * connection. We can only be sure RDMA activity
3208 * has ceased once the QP has been modified. */
3209 while (!list_empty(&closes)) {
3210 conn = list_entry(closes.next,
3211 kib_conn_t, ibc_connd_list);
3212 list_del(&conn->ibc_connd_list);
3213 kiblnd_close_conn(conn, -ETIMEDOUT);
3214 kiblnd_conn_decref(conn);
3217 /* In case we have enough credits to return via a
3218 * NOOP, but there were no non-blocking tx descs
3219 * free to do it last time... */
3220 while (!list_empty(&checksends)) {
3221 conn = list_entry(checksends.next,
3222 kib_conn_t, ibc_connd_list);
3223 list_del(&conn->ibc_connd_list);
3224 kiblnd_check_sends(conn);
3225 kiblnd_conn_decref(conn);
3230 kiblnd_disconnect_conn (kib_conn_t *conn)
3232 LASSERT (!in_interrupt());
3233 LASSERT (current == kiblnd_data.kib_connd);
3234 LASSERT (conn->ibc_state == IBLND_CONN_CLOSING);
3236 rdma_disconnect(conn->ibc_cmid);
3237 kiblnd_finalise_conn(conn);
3239 kiblnd_peer_notify(conn->ibc_peer);
3243 * High-water for reconnection to the same peer, reconnection attempt should
3244 * be delayed after trying more than KIB_RECONN_HIGH_RACE.
3246 #define KIB_RECONN_HIGH_RACE 10
3248 * Allow connd to take a break and handle other things after consecutive
3249 * reconnection attemps.
3251 #define KIB_RECONN_BREAK 100
3254 kiblnd_connd (void *arg)
3256 spinlock_t *lock= &kiblnd_data.kib_connd_lock;
3258 unsigned long flags;
3264 unsigned long deadline = jiffies;
3266 cfs_block_allsigs();
3268 init_waitqueue_entry(&wait, current);
3269 kiblnd_data.kib_connd = current;
3271 spin_lock_irqsave(lock, flags);
3273 while (!kiblnd_data.kib_shutdown) {
3278 if (!list_empty(&kiblnd_data.kib_connd_zombies)) {
3279 kib_peer_t *peer = NULL;
3281 conn = list_entry(kiblnd_data.kib_connd_zombies.next,
3282 kib_conn_t, ibc_list);
3283 list_del(&conn->ibc_list);
3284 if (conn->ibc_reconnect) {
3285 peer = conn->ibc_peer;
3286 kiblnd_peer_addref(peer);
3289 spin_unlock_irqrestore(lock, flags);
3292 kiblnd_destroy_conn(conn, !peer);
3294 spin_lock_irqsave(lock, flags);
3298 conn->ibc_peer = peer;
3299 if (peer->ibp_reconnected < KIB_RECONN_HIGH_RACE)
3300 list_add_tail(&conn->ibc_list,
3301 &kiblnd_data.kib_reconn_list);
3303 list_add_tail(&conn->ibc_list,
3304 &kiblnd_data.kib_reconn_wait);
3307 if (!list_empty(&kiblnd_data.kib_connd_conns)) {
3308 conn = list_entry(kiblnd_data.kib_connd_conns.next,
3309 kib_conn_t, ibc_list);
3310 list_del(&conn->ibc_list);
3312 spin_unlock_irqrestore(lock, flags);
3315 kiblnd_disconnect_conn(conn);
3316 kiblnd_conn_decref(conn);
3318 spin_lock_irqsave(lock, flags);
3321 while (reconn < KIB_RECONN_BREAK) {
3322 if (kiblnd_data.kib_reconn_sec != get_seconds()) {
3323 kiblnd_data.kib_reconn_sec = get_seconds();
3324 list_splice_init(&kiblnd_data.kib_reconn_wait,
3325 &kiblnd_data.kib_reconn_list);
3328 if (list_empty(&kiblnd_data.kib_reconn_list))
3331 conn = list_entry(kiblnd_data.kib_reconn_list.next,
3332 kib_conn_t, ibc_list);
3333 list_del(&conn->ibc_list);
3335 spin_unlock_irqrestore(lock, flags);
3338 reconn += kiblnd_reconnect_peer(conn->ibc_peer);
3339 kiblnd_peer_decref(conn->ibc_peer);
3340 LIBCFS_FREE(conn, sizeof(*conn));
3342 spin_lock_irqsave(lock, flags);
3345 /* careful with the jiffy wrap... */
3346 timeout = (int)(deadline - jiffies);
3350 int chunk = kiblnd_data.kib_peer_hash_size;
3352 spin_unlock_irqrestore(lock, flags);
3355 /* Time to check for RDMA timeouts on a few more
3356 * peers: I do checks every 'p' seconds on a
3357 * proportion of the peer table and I need to check
3358 * every connection 'n' times within a timeout
3359 * interval, to ensure I detect a timeout on any
3360 * connection within (n+1)/n times the timeout
3363 if (*kiblnd_tunables.kib_timeout > n * p)
3364 chunk = (chunk * n * p) /
3365 *kiblnd_tunables.kib_timeout;
3369 for (i = 0; i < chunk; i++) {
3370 kiblnd_check_conns(peer_index);
3371 peer_index = (peer_index + 1) %
3372 kiblnd_data.kib_peer_hash_size;
3375 deadline += msecs_to_jiffies(p * MSEC_PER_SEC);
3376 spin_lock_irqsave(lock, flags);
3382 /* Nothing to do for 'timeout' */
3383 set_current_state(TASK_INTERRUPTIBLE);
3384 add_wait_queue(&kiblnd_data.kib_connd_waitq, &wait);
3385 spin_unlock_irqrestore(lock, flags);
3387 schedule_timeout(timeout);
3389 set_current_state(TASK_RUNNING);
3390 remove_wait_queue(&kiblnd_data.kib_connd_waitq, &wait);
3391 spin_lock_irqsave(lock, flags);
3394 spin_unlock_irqrestore(lock, flags);
3396 kiblnd_thread_fini();
3401 kiblnd_qp_event(struct ib_event *event, void *arg)
3403 kib_conn_t *conn = arg;
3405 switch (event->event) {
3406 case IB_EVENT_COMM_EST:
3407 CDEBUG(D_NET, "%s established\n",
3408 libcfs_nid2str(conn->ibc_peer->ibp_nid));
3412 CERROR("%s: Async QP event type %d\n",
3413 libcfs_nid2str(conn->ibc_peer->ibp_nid), event->event);
3419 kiblnd_complete (struct ib_wc *wc)
3421 switch (kiblnd_wreqid2type(wc->wr_id)) {
3426 if (wc->status != IB_WC_SUCCESS &&
3427 wc->status != IB_WC_WR_FLUSH_ERR)
3428 CNETERR("FastReg failed: %d\n", wc->status);
3431 case IBLND_WID_RDMA:
3432 /* We only get RDMA completion notification if it fails. All
3433 * subsequent work items, including the final SEND will fail
3434 * too. However we can't print out any more info about the
3435 * failing RDMA because 'tx' might be back on the idle list or
3436 * even reused already if we didn't manage to post all our work
3438 CNETERR("RDMA (tx: %p) failed: %d\n",
3439 kiblnd_wreqid2ptr(wc->wr_id), wc->status);
3443 kiblnd_tx_complete(kiblnd_wreqid2ptr(wc->wr_id), wc->status);
3447 kiblnd_rx_complete(kiblnd_wreqid2ptr(wc->wr_id), wc->status,
3454 kiblnd_cq_completion(struct ib_cq *cq, void *arg)
3456 /* NB I'm not allowed to schedule this conn once its refcount has
3457 * reached 0. Since fundamentally I'm racing with scheduler threads
3458 * consuming my CQ I could be called after all completions have
3459 * occurred. But in this case, ibc_nrx == 0 && ibc_nsends_posted == 0
3460 * and this CQ is about to be destroyed so I NOOP. */
3461 kib_conn_t *conn = (kib_conn_t *)arg;
3462 struct kib_sched_info *sched = conn->ibc_sched;
3463 unsigned long flags;
3465 LASSERT(cq == conn->ibc_cq);
3467 spin_lock_irqsave(&sched->ibs_lock, flags);
3469 conn->ibc_ready = 1;
3471 if (!conn->ibc_scheduled &&
3472 (conn->ibc_nrx > 0 ||
3473 conn->ibc_nsends_posted > 0)) {
3474 kiblnd_conn_addref(conn); /* +1 ref for sched_conns */
3475 conn->ibc_scheduled = 1;
3476 list_add_tail(&conn->ibc_sched_list, &sched->ibs_conns);
3478 if (waitqueue_active(&sched->ibs_waitq))
3479 wake_up(&sched->ibs_waitq);
3482 spin_unlock_irqrestore(&sched->ibs_lock, flags);
3486 kiblnd_cq_event(struct ib_event *event, void *arg)
3488 kib_conn_t *conn = arg;
3490 CERROR("%s: async CQ event type %d\n",
3491 libcfs_nid2str(conn->ibc_peer->ibp_nid), event->event);
3495 kiblnd_scheduler(void *arg)
3497 long id = (long)arg;
3498 struct kib_sched_info *sched;
3501 unsigned long flags;
3507 cfs_block_allsigs();
3509 init_waitqueue_entry(&wait, current);
3511 sched = kiblnd_data.kib_scheds[KIB_THREAD_CPT(id)];
3513 rc = cfs_cpt_bind(lnet_cpt_table(), sched->ibs_cpt);
3515 CWARN("Failed to bind on CPT %d, please verify whether "
3516 "all CPUs are healthy and reload modules if necessary, "
3517 "otherwise your system might under risk of low "
3518 "performance\n", sched->ibs_cpt);
3521 spin_lock_irqsave(&sched->ibs_lock, flags);
3523 while (!kiblnd_data.kib_shutdown) {
3524 if (busy_loops++ >= IBLND_RESCHED) {
3525 spin_unlock_irqrestore(&sched->ibs_lock, flags);
3530 spin_lock_irqsave(&sched->ibs_lock, flags);
3535 if (!list_empty(&sched->ibs_conns)) {
3536 conn = list_entry(sched->ibs_conns.next,
3537 kib_conn_t, ibc_sched_list);
3538 /* take over kib_sched_conns' ref on conn... */
3539 LASSERT(conn->ibc_scheduled);
3540 list_del(&conn->ibc_sched_list);
3541 conn->ibc_ready = 0;
3543 spin_unlock_irqrestore(&sched->ibs_lock, flags);
3545 wc.wr_id = IBLND_WID_INVAL;
3547 rc = ib_poll_cq(conn->ibc_cq, 1, &wc);
3549 rc = ib_req_notify_cq(conn->ibc_cq,
3552 CWARN("%s: ib_req_notify_cq failed: %d, "
3553 "closing connection\n",
3554 libcfs_nid2str(conn->ibc_peer->ibp_nid), rc);
3555 kiblnd_close_conn(conn, -EIO);
3556 kiblnd_conn_decref(conn);
3557 spin_lock_irqsave(&sched->ibs_lock,
3562 rc = ib_poll_cq(conn->ibc_cq, 1, &wc);
3565 if (unlikely(rc > 0 && wc.wr_id == IBLND_WID_INVAL)) {
3567 "ib_poll_cq (rc: %d) returned invalid "
3568 "wr_id, opcode %d, status: %d, "
3569 "vendor_err: %d, conn: %s status: %d\n"
3570 "please upgrade firmware and OFED or "
3571 "contact vendor.\n", rc,
3572 wc.opcode, wc.status, wc.vendor_err,
3573 libcfs_nid2str(conn->ibc_peer->ibp_nid),
3579 CWARN("%s: ib_poll_cq failed: %d, "
3580 "closing connection\n",
3581 libcfs_nid2str(conn->ibc_peer->ibp_nid),
3583 kiblnd_close_conn(conn, -EIO);
3584 kiblnd_conn_decref(conn);
3585 spin_lock_irqsave(&sched->ibs_lock, flags);
3589 spin_lock_irqsave(&sched->ibs_lock, flags);
3591 if (rc != 0 || conn->ibc_ready) {
3592 /* There may be another completion waiting; get
3593 * another scheduler to check while I handle
3595 /* +1 ref for sched_conns */
3596 kiblnd_conn_addref(conn);
3597 list_add_tail(&conn->ibc_sched_list,
3599 if (waitqueue_active(&sched->ibs_waitq))
3600 wake_up(&sched->ibs_waitq);
3602 conn->ibc_scheduled = 0;
3606 spin_unlock_irqrestore(&sched->ibs_lock, flags);
3607 kiblnd_complete(&wc);
3609 spin_lock_irqsave(&sched->ibs_lock, flags);
3612 kiblnd_conn_decref(conn); /* ...drop my ref from above */
3619 set_current_state(TASK_INTERRUPTIBLE);
3620 add_wait_queue_exclusive(&sched->ibs_waitq, &wait);
3621 spin_unlock_irqrestore(&sched->ibs_lock, flags);
3626 remove_wait_queue(&sched->ibs_waitq, &wait);
3627 set_current_state(TASK_RUNNING);
3628 spin_lock_irqsave(&sched->ibs_lock, flags);
3631 spin_unlock_irqrestore(&sched->ibs_lock, flags);
3633 kiblnd_thread_fini();
3638 kiblnd_failover_thread(void *arg)
3640 rwlock_t *glock = &kiblnd_data.kib_global_lock;
3643 unsigned long flags;
3646 LASSERT(*kiblnd_tunables.kib_dev_failover != 0);
3648 cfs_block_allsigs();
3650 init_waitqueue_entry(&wait, current);
3651 write_lock_irqsave(glock, flags);
3653 while (!kiblnd_data.kib_shutdown) {
3654 int do_failover = 0;
3657 list_for_each_entry(dev, &kiblnd_data.kib_failed_devs,
3659 if (cfs_time_before(cfs_time_current(),
3660 dev->ibd_next_failover))
3667 list_del_init(&dev->ibd_fail_list);
3668 dev->ibd_failover = 1;
3669 write_unlock_irqrestore(glock, flags);
3671 rc = kiblnd_dev_failover(dev);
3673 write_lock_irqsave(glock, flags);
3675 LASSERT (dev->ibd_failover);
3676 dev->ibd_failover = 0;
3677 if (rc >= 0) { /* Device is OK or failover succeed */
3678 dev->ibd_next_failover = cfs_time_shift(3);
3682 /* failed to failover, retry later */
3683 dev->ibd_next_failover =
3684 cfs_time_shift(min(dev->ibd_failed_failover, 10));
3685 if (kiblnd_dev_can_failover(dev)) {
3686 list_add_tail(&dev->ibd_fail_list,
3687 &kiblnd_data.kib_failed_devs);
3693 /* long sleep if no more pending failover */
3694 long_sleep = list_empty(&kiblnd_data.kib_failed_devs);
3696 set_current_state(TASK_INTERRUPTIBLE);
3697 add_wait_queue(&kiblnd_data.kib_failover_waitq, &wait);
3698 write_unlock_irqrestore(glock, flags);
3700 rc = schedule_timeout(long_sleep ? cfs_time_seconds(10) :
3701 cfs_time_seconds(1));
3702 set_current_state(TASK_RUNNING);
3703 remove_wait_queue(&kiblnd_data.kib_failover_waitq, &wait);
3704 write_lock_irqsave(glock, flags);
3706 if (!long_sleep || rc != 0)
3709 /* have a long sleep, routine check all active devices,
3710 * we need checking like this because if there is not active
3711 * connection on the dev and no SEND from local, we may listen
3712 * on wrong HCA for ever while there is a bonding failover */
3713 list_for_each_entry(dev, &kiblnd_data.kib_devs, ibd_list) {
3714 if (kiblnd_dev_can_failover(dev)) {
3715 list_add_tail(&dev->ibd_fail_list,
3716 &kiblnd_data.kib_failed_devs);
3721 write_unlock_irqrestore(glock, flags);
3723 kiblnd_thread_fini();