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).
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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;
63 LASSERT(!in_interrupt());
64 LASSERT(!tx->tx_queued); /* mustn't be queued for sending */
65 LASSERT(!tx->tx_sending); /* mustn't be awaiting sent callback */
66 LASSERT(!tx->tx_waiting); /* mustn't be awaiting peer response */
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;
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++) {
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 = list_entry(node, kib_tx_t, tx_list);
127 LASSERT(!tx->tx_nwrq);
128 LASSERT(!tx->tx_queued);
129 LASSERT(!tx->tx_sending);
130 LASSERT(!tx->tx_waiting);
131 LASSERT(!tx->tx_status);
132 LASSERT(!tx->tx_conn);
133 LASSERT(!tx->tx_lntmsg[0]);
134 LASSERT(!tx->tx_lntmsg[1]);
135 LASSERT(!tx->tx_nfrags);
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;
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);
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 */
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 || 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 %#llx from %s\n",
265 txtype, cookie, libcfs_nid2str(conn->ibc_peer->ibp_nid));
266 kiblnd_close_conn(conn, -EPROTO);
270 if (!tx->tx_status) { /* 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);
279 idle = !tx->tx_queued && !tx->tx_sending;
281 list_del(&tx->tx_list);
283 spin_unlock(&conn->ibc_lock);
286 kiblnd_tx_done(ni, tx);
290 kiblnd_send_completion(kib_conn_t *conn, int type, int status, __u64 cookie)
292 lnet_ni_t *ni = conn->ibc_peer->ibp_ni;
293 kib_tx_t *tx = kiblnd_get_idle_tx(ni, conn->ibc_peer->ibp_nid);
296 CERROR("Can't get tx for completion %x for %s\n",
297 type, libcfs_nid2str(conn->ibc_peer->ibp_nid));
301 tx->tx_msg->ibm_u.completion.ibcm_status = status;
302 tx->tx_msg->ibm_u.completion.ibcm_cookie = cookie;
303 kiblnd_init_tx_msg(ni, tx, type, sizeof(kib_completion_msg_t));
305 kiblnd_queue_tx(tx, conn);
309 kiblnd_handle_rx(kib_rx_t *rx)
311 kib_msg_t *msg = rx->rx_msg;
312 kib_conn_t *conn = rx->rx_conn;
313 lnet_ni_t *ni = conn->ibc_peer->ibp_ni;
314 int credits = msg->ibm_credits;
320 LASSERT(conn->ibc_state >= IBLND_CONN_ESTABLISHED);
322 CDEBUG(D_NET, "Received %x[%d] from %s\n",
323 msg->ibm_type, credits,
324 libcfs_nid2str(conn->ibc_peer->ibp_nid));
327 /* Have I received credits that will let me send? */
328 spin_lock(&conn->ibc_lock);
330 if (conn->ibc_credits + credits >
331 conn->ibc_queue_depth) {
332 rc2 = conn->ibc_credits;
333 spin_unlock(&conn->ibc_lock);
335 CERROR("Bad credits from %s: %d + %d > %d\n",
336 libcfs_nid2str(conn->ibc_peer->ibp_nid),
337 rc2, credits, conn->ibc_queue_depth);
339 kiblnd_close_conn(conn, -EPROTO);
340 kiblnd_post_rx(rx, IBLND_POSTRX_NO_CREDIT);
344 conn->ibc_credits += credits;
346 /* This ensures the credit taken by NOOP can be returned */
347 if (msg->ibm_type == IBLND_MSG_NOOP &&
348 !IBLND_OOB_CAPABLE(conn->ibc_version)) /* v1 only */
349 conn->ibc_outstanding_credits++;
351 spin_unlock(&conn->ibc_lock);
352 kiblnd_check_sends(conn);
355 switch (msg->ibm_type) {
357 CERROR("Bad IBLND message type %x from %s\n",
358 msg->ibm_type, libcfs_nid2str(conn->ibc_peer->ibp_nid));
359 post_credit = IBLND_POSTRX_NO_CREDIT;
364 if (IBLND_OOB_CAPABLE(conn->ibc_version)) {
365 post_credit = IBLND_POSTRX_NO_CREDIT;
369 if (credits) /* credit already posted */
370 post_credit = IBLND_POSTRX_NO_CREDIT;
371 else /* a keepalive NOOP */
372 post_credit = IBLND_POSTRX_PEER_CREDIT;
375 case IBLND_MSG_IMMEDIATE:
376 post_credit = IBLND_POSTRX_DONT_POST;
377 rc = lnet_parse(ni, &msg->ibm_u.immediate.ibim_hdr,
378 msg->ibm_srcnid, rx, 0);
379 if (rc < 0) /* repost on error */
380 post_credit = IBLND_POSTRX_PEER_CREDIT;
383 case IBLND_MSG_PUT_REQ:
384 post_credit = IBLND_POSTRX_DONT_POST;
385 rc = lnet_parse(ni, &msg->ibm_u.putreq.ibprm_hdr,
386 msg->ibm_srcnid, rx, 1);
387 if (rc < 0) /* repost on error */
388 post_credit = IBLND_POSTRX_PEER_CREDIT;
391 case IBLND_MSG_PUT_NAK:
392 CWARN("PUT_NACK from %s\n",
393 libcfs_nid2str(conn->ibc_peer->ibp_nid));
394 post_credit = IBLND_POSTRX_RSRVD_CREDIT;
395 kiblnd_handle_completion(conn, IBLND_MSG_PUT_REQ,
396 msg->ibm_u.completion.ibcm_status,
397 msg->ibm_u.completion.ibcm_cookie);
400 case IBLND_MSG_PUT_ACK:
401 post_credit = IBLND_POSTRX_RSRVD_CREDIT;
403 spin_lock(&conn->ibc_lock);
404 tx = kiblnd_find_waiting_tx_locked(conn, IBLND_MSG_PUT_REQ,
405 msg->ibm_u.putack.ibpam_src_cookie);
407 list_del(&tx->tx_list);
408 spin_unlock(&conn->ibc_lock);
411 CERROR("Unmatched PUT_ACK from %s\n",
412 libcfs_nid2str(conn->ibc_peer->ibp_nid));
417 LASSERT(tx->tx_waiting);
419 * CAVEAT EMPTOR: I could be racing with tx_complete, but...
420 * (a) I can overwrite tx_msg since my peer has received it!
421 * (b) tx_waiting set tells tx_complete() it's not done.
423 tx->tx_nwrq = 0; /* overwrite PUT_REQ */
425 rc2 = kiblnd_init_rdma(conn, tx, IBLND_MSG_PUT_DONE,
426 kiblnd_rd_size(&msg->ibm_u.putack.ibpam_rd),
427 &msg->ibm_u.putack.ibpam_rd,
428 msg->ibm_u.putack.ibpam_dst_cookie);
430 CERROR("Can't setup rdma for PUT to %s: %d\n",
431 libcfs_nid2str(conn->ibc_peer->ibp_nid), rc2);
433 spin_lock(&conn->ibc_lock);
434 tx->tx_waiting = 0; /* clear waiting and queue atomically */
435 kiblnd_queue_tx_locked(tx, conn);
436 spin_unlock(&conn->ibc_lock);
439 case IBLND_MSG_PUT_DONE:
440 post_credit = IBLND_POSTRX_PEER_CREDIT;
441 kiblnd_handle_completion(conn, IBLND_MSG_PUT_ACK,
442 msg->ibm_u.completion.ibcm_status,
443 msg->ibm_u.completion.ibcm_cookie);
446 case IBLND_MSG_GET_REQ:
447 post_credit = IBLND_POSTRX_DONT_POST;
448 rc = lnet_parse(ni, &msg->ibm_u.get.ibgm_hdr,
449 msg->ibm_srcnid, rx, 1);
450 if (rc < 0) /* repost on error */
451 post_credit = IBLND_POSTRX_PEER_CREDIT;
454 case IBLND_MSG_GET_DONE:
455 post_credit = IBLND_POSTRX_RSRVD_CREDIT;
456 kiblnd_handle_completion(conn, IBLND_MSG_GET_REQ,
457 msg->ibm_u.completion.ibcm_status,
458 msg->ibm_u.completion.ibcm_cookie);
462 if (rc < 0) /* protocol error */
463 kiblnd_close_conn(conn, rc);
465 if (post_credit != IBLND_POSTRX_DONT_POST)
466 kiblnd_post_rx(rx, post_credit);
470 kiblnd_rx_complete(kib_rx_t *rx, int status, int nob)
472 kib_msg_t *msg = rx->rx_msg;
473 kib_conn_t *conn = rx->rx_conn;
474 lnet_ni_t *ni = conn->ibc_peer->ibp_ni;
475 kib_net_t *net = ni->ni_data;
480 LASSERT(rx->rx_nob < 0); /* was posted */
481 rx->rx_nob = 0; /* isn't now */
483 if (conn->ibc_state > IBLND_CONN_ESTABLISHED)
486 if (status != IB_WC_SUCCESS) {
487 CNETERR("Rx from %s failed: %d\n",
488 libcfs_nid2str(conn->ibc_peer->ibp_nid), status);
495 rc = kiblnd_unpack_msg(msg, rx->rx_nob);
497 CERROR("Error %d unpacking rx from %s\n",
498 rc, libcfs_nid2str(conn->ibc_peer->ibp_nid));
502 if (msg->ibm_srcnid != conn->ibc_peer->ibp_nid ||
503 msg->ibm_dstnid != ni->ni_nid ||
504 msg->ibm_srcstamp != conn->ibc_incarnation ||
505 msg->ibm_dststamp != net->ibn_incarnation) {
506 CERROR("Stale rx from %s\n",
507 libcfs_nid2str(conn->ibc_peer->ibp_nid));
512 /* set time last known alive */
513 kiblnd_peer_alive(conn->ibc_peer);
515 /* racing with connection establishment/teardown! */
517 if (conn->ibc_state < IBLND_CONN_ESTABLISHED) {
518 rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
521 write_lock_irqsave(g_lock, flags);
522 /* must check holding global lock to eliminate race */
523 if (conn->ibc_state < IBLND_CONN_ESTABLISHED) {
524 list_add_tail(&rx->rx_list, &conn->ibc_early_rxs);
525 write_unlock_irqrestore(g_lock, flags);
528 write_unlock_irqrestore(g_lock, flags);
530 kiblnd_handle_rx(rx);
534 CDEBUG(D_NET, "rx %p conn %p\n", rx, conn);
535 kiblnd_close_conn(conn, err);
537 kiblnd_drop_rx(rx); /* Don't re-post rx. */
541 kiblnd_kvaddr_to_page(unsigned long vaddr)
545 if (is_vmalloc_addr((void *)vaddr)) {
546 page = vmalloc_to_page((void *)vaddr);
550 #ifdef CONFIG_HIGHMEM
551 if (vaddr >= PKMAP_BASE &&
552 vaddr < (PKMAP_BASE + LAST_PKMAP * PAGE_SIZE)) {
553 /* No highmem pages only used for bulk (kiov) I/O */
554 CERROR("find page for address in highmem\n");
558 page = virt_to_page(vaddr);
564 kiblnd_fmr_map_tx(kib_net_t *net, kib_tx_t *tx, kib_rdma_desc_t *rd, __u32 nob)
567 kib_fmr_poolset_t *fps;
571 LASSERT(tx->tx_pool);
572 LASSERT(tx->tx_pool->tpo_pool.po_owner);
574 hdev = tx->tx_pool->tpo_hdev;
575 cpt = tx->tx_pool->tpo_pool.po_owner->ps_cpt;
577 fps = net->ibn_fmr_ps[cpt];
578 rc = kiblnd_fmr_pool_map(fps, tx, rd, nob, 0, &tx->fmr);
580 CERROR("Can't map %u bytes: %d\n", nob, rc);
585 * If rd is not tx_rd, it's going to get sent to a peer, who will need
588 rd->rd_key = tx->fmr.fmr_key;
589 rd->rd_frags[0].rf_addr &= ~hdev->ibh_page_mask;
590 rd->rd_frags[0].rf_nob = nob;
596 static void kiblnd_unmap_tx(lnet_ni_t *ni, kib_tx_t *tx)
598 kib_net_t *net = ni->ni_data;
603 kiblnd_fmr_pool_unmap(&tx->fmr, tx->tx_status);
606 kiblnd_dma_unmap_sg(tx->tx_pool->tpo_hdev->ibh_ibdev,
607 tx->tx_frags, tx->tx_nfrags, tx->tx_dmadir);
612 static int kiblnd_map_tx(lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd,
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;
622 * If rd is not tx_rd, it's going to get sent to a peer and I'm the
625 tx->tx_dmadir = (rd != tx->tx_rd) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
626 tx->tx_nfrags = nfrags;
628 rd->rd_nfrags = kiblnd_dma_map_sg(hdev->ibh_ibdev, tx->tx_frags,
629 tx->tx_nfrags, tx->tx_dmadir);
631 for (i = 0, nob = 0; i < rd->rd_nfrags; i++) {
632 rd->rd_frags[i].rf_nob = kiblnd_sg_dma_len(
633 hdev->ibh_ibdev, &tx->tx_frags[i]);
634 rd->rd_frags[i].rf_addr = kiblnd_sg_dma_address(
635 hdev->ibh_ibdev, &tx->tx_frags[i]);
636 nob += rd->rd_frags[i].rf_nob;
639 mr = kiblnd_find_rd_dma_mr(ni, rd, tx->tx_conn ?
640 tx->tx_conn->ibc_max_frags : -1);
642 /* found pre-mapping MR */
643 rd->rd_key = (rd != tx->tx_rd) ? mr->rkey : mr->lkey;
648 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;
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 if (offset + fragnob < iov->iov_len) {
703 return kiblnd_map_tx(ni, tx, rd, sg - tx->tx_frags);
707 kiblnd_setup_rd_kiov(lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd,
708 int nkiov, lnet_kiov_t *kiov, int offset, int nob)
710 kib_net_t *net = ni->ni_data;
711 struct scatterlist *sg;
714 CDEBUG(D_NET, "niov %d offset %d nob %d\n", nkiov, offset, nob);
720 while (offset >= kiov->kiov_len) {
721 offset -= kiov->kiov_len;
731 fragnob = min((int)(kiov->kiov_len - offset), nob);
733 sg_set_page(sg, kiov->kiov_page, fragnob,
734 kiov->kiov_offset + offset);
743 return kiblnd_map_tx(ni, tx, rd, sg - tx->tx_frags);
747 kiblnd_post_tx_locked(kib_conn_t *conn, kib_tx_t *tx, int credit)
748 __must_hold(&conn->ibc_lock)
750 kib_msg_t *msg = tx->tx_msg;
751 kib_peer_t *peer = conn->ibc_peer;
752 struct lnet_ni *ni = peer->ibp_ni;
753 int ver = conn->ibc_version;
757 LASSERT(tx->tx_queued);
758 /* We rely on this for QP sizing */
759 LASSERT(tx->tx_nwrq > 0);
760 LASSERT(tx->tx_nwrq <= 1 + conn->ibc_max_frags);
762 LASSERT(!credit || credit == 1);
763 LASSERT(conn->ibc_outstanding_credits >= 0);
764 LASSERT(conn->ibc_outstanding_credits <= conn->ibc_queue_depth);
765 LASSERT(conn->ibc_credits >= 0);
766 LASSERT(conn->ibc_credits <= conn->ibc_queue_depth);
768 if (conn->ibc_nsends_posted == kiblnd_concurrent_sends(ver, ni)) {
769 /* tx completions outstanding... */
770 CDEBUG(D_NET, "%s: posted enough\n",
771 libcfs_nid2str(peer->ibp_nid));
775 if (credit && !conn->ibc_credits) { /* no credits */
776 CDEBUG(D_NET, "%s: no credits\n",
777 libcfs_nid2str(peer->ibp_nid));
781 if (credit && !IBLND_OOB_CAPABLE(ver) &&
782 conn->ibc_credits == 1 && /* last credit reserved */
783 msg->ibm_type != IBLND_MSG_NOOP) { /* for NOOP */
784 CDEBUG(D_NET, "%s: not using last credit\n",
785 libcfs_nid2str(peer->ibp_nid));
789 /* NB don't drop ibc_lock before bumping tx_sending */
790 list_del(&tx->tx_list);
793 if (msg->ibm_type == IBLND_MSG_NOOP &&
794 (!kiblnd_need_noop(conn) || /* redundant NOOP */
795 (IBLND_OOB_CAPABLE(ver) && /* posted enough NOOP */
796 conn->ibc_noops_posted == IBLND_OOB_MSGS(ver)))) {
798 * OK to drop when posted enough NOOPs, since
799 * kiblnd_check_sends will queue NOOP again when
800 * posted NOOPs complete
802 spin_unlock(&conn->ibc_lock);
803 kiblnd_tx_done(peer->ibp_ni, tx);
804 spin_lock(&conn->ibc_lock);
805 CDEBUG(D_NET, "%s(%d): redundant or enough NOOP\n",
806 libcfs_nid2str(peer->ibp_nid),
807 conn->ibc_noops_posted);
811 kiblnd_pack_msg(peer->ibp_ni, msg, ver, conn->ibc_outstanding_credits,
812 peer->ibp_nid, conn->ibc_incarnation);
814 conn->ibc_credits -= credit;
815 conn->ibc_outstanding_credits = 0;
816 conn->ibc_nsends_posted++;
817 if (msg->ibm_type == IBLND_MSG_NOOP)
818 conn->ibc_noops_posted++;
821 * CAVEAT EMPTOR! This tx could be the PUT_DONE of an RDMA
822 * PUT. If so, it was first queued here as a PUT_REQ, sent and
823 * stashed on ibc_active_txs, matched by an incoming PUT_ACK,
824 * and then re-queued here. It's (just) possible that
825 * tx_sending is non-zero if we've not done the tx_complete()
826 * from the first send; hence the ++ rather than = below.
829 list_add(&tx->tx_list, &conn->ibc_active_txs);
831 /* I'm still holding ibc_lock! */
832 if (conn->ibc_state != IBLND_CONN_ESTABLISHED) {
834 } else if (tx->tx_pool->tpo_pool.po_failed ||
835 conn->ibc_hdev != tx->tx_pool->tpo_hdev) {
836 /* close_conn will launch failover */
839 struct kib_fast_reg_descriptor *frd = tx->fmr.fmr_frd;
840 struct ib_send_wr *bad = &tx->tx_wrq[tx->tx_nwrq - 1].wr;
841 struct ib_send_wr *wrq = &tx->tx_wrq[0].wr;
844 if (!frd->frd_valid) {
845 wrq = &frd->frd_inv_wr;
846 wrq->next = &frd->frd_fastreg_wr.wr;
848 wrq = &frd->frd_fastreg_wr.wr;
850 frd->frd_fastreg_wr.wr.next = &tx->tx_wrq[0].wr;
853 LASSERTF(bad->wr_id == kiblnd_ptr2wreqid(tx, IBLND_WID_TX),
854 "bad wr_id %llx, opc %d, flags %d, peer: %s\n",
855 bad->wr_id, bad->opcode, bad->send_flags,
856 libcfs_nid2str(conn->ibc_peer->ibp_nid));
858 rc = ib_post_send(conn->ibc_cmid->qp, wrq, &bad);
861 conn->ibc_last_send = jiffies;
867 * NB credits are transferred in the actual
868 * message, which can only be the last work item
870 conn->ibc_credits += credit;
871 conn->ibc_outstanding_credits += msg->ibm_credits;
872 conn->ibc_nsends_posted--;
873 if (msg->ibm_type == IBLND_MSG_NOOP)
874 conn->ibc_noops_posted--;
880 done = !tx->tx_sending;
882 list_del(&tx->tx_list);
884 spin_unlock(&conn->ibc_lock);
886 if (conn->ibc_state == IBLND_CONN_ESTABLISHED)
887 CERROR("Error %d posting transmit to %s\n",
888 rc, libcfs_nid2str(peer->ibp_nid));
890 CDEBUG(D_NET, "Error %d posting transmit to %s\n",
891 rc, libcfs_nid2str(peer->ibp_nid));
893 kiblnd_close_conn(conn, rc);
896 kiblnd_tx_done(peer->ibp_ni, tx);
898 spin_lock(&conn->ibc_lock);
904 kiblnd_check_sends(kib_conn_t *conn)
906 int ver = conn->ibc_version;
907 lnet_ni_t *ni = conn->ibc_peer->ibp_ni;
910 /* Don't send anything until after the connection is established */
911 if (conn->ibc_state < IBLND_CONN_ESTABLISHED) {
912 CDEBUG(D_NET, "%s too soon\n",
913 libcfs_nid2str(conn->ibc_peer->ibp_nid));
917 spin_lock(&conn->ibc_lock);
919 LASSERT(conn->ibc_nsends_posted <= kiblnd_concurrent_sends(ver, ni));
920 LASSERT(!IBLND_OOB_CAPABLE(ver) ||
921 conn->ibc_noops_posted <= IBLND_OOB_MSGS(ver));
922 LASSERT(conn->ibc_reserved_credits >= 0);
924 while (conn->ibc_reserved_credits > 0 &&
925 !list_empty(&conn->ibc_tx_queue_rsrvd)) {
926 tx = list_entry(conn->ibc_tx_queue_rsrvd.next,
928 list_del(&tx->tx_list);
929 list_add_tail(&tx->tx_list, &conn->ibc_tx_queue);
930 conn->ibc_reserved_credits--;
933 if (kiblnd_need_noop(conn)) {
934 spin_unlock(&conn->ibc_lock);
936 tx = kiblnd_get_idle_tx(ni, conn->ibc_peer->ibp_nid);
938 kiblnd_init_tx_msg(ni, tx, IBLND_MSG_NOOP, 0);
940 spin_lock(&conn->ibc_lock);
942 kiblnd_queue_tx_locked(tx, conn);
948 if (!list_empty(&conn->ibc_tx_queue_nocred)) {
950 tx = list_entry(conn->ibc_tx_queue_nocred.next,
952 } else if (!list_empty(&conn->ibc_tx_noops)) {
953 LASSERT(!IBLND_OOB_CAPABLE(ver));
955 tx = list_entry(conn->ibc_tx_noops.next,
957 } else if (!list_empty(&conn->ibc_tx_queue)) {
959 tx = list_entry(conn->ibc_tx_queue.next,
965 if (kiblnd_post_tx_locked(conn, tx, credit))
969 spin_unlock(&conn->ibc_lock);
973 kiblnd_tx_complete(kib_tx_t *tx, int status)
975 int failed = (status != IB_WC_SUCCESS);
976 kib_conn_t *conn = tx->tx_conn;
979 LASSERT(tx->tx_sending > 0);
982 if (conn->ibc_state == IBLND_CONN_ESTABLISHED)
983 CNETERR("Tx -> %s cookie %#llx sending %d waiting %d: failed %d\n",
984 libcfs_nid2str(conn->ibc_peer->ibp_nid),
985 tx->tx_cookie, tx->tx_sending, tx->tx_waiting,
988 kiblnd_close_conn(conn, -EIO);
990 kiblnd_peer_alive(conn->ibc_peer);
993 spin_lock(&conn->ibc_lock);
996 * I could be racing with rdma completion. Whoever makes 'tx' idle
997 * gets to free it, which also drops its ref on 'conn'.
1000 conn->ibc_nsends_posted--;
1001 if (tx->tx_msg->ibm_type == IBLND_MSG_NOOP)
1002 conn->ibc_noops_posted--;
1005 tx->tx_waiting = 0; /* don't wait for peer */
1006 tx->tx_status = -EIO;
1009 idle = !tx->tx_sending && /* This is the final callback */
1010 !tx->tx_waiting && /* Not waiting for peer */
1011 !tx->tx_queued; /* Not re-queued (PUT_DONE) */
1013 list_del(&tx->tx_list);
1015 kiblnd_conn_addref(conn); /* 1 ref for me.... */
1017 spin_unlock(&conn->ibc_lock);
1020 kiblnd_tx_done(conn->ibc_peer->ibp_ni, tx);
1022 kiblnd_check_sends(conn);
1024 kiblnd_conn_decref(conn); /* ...until here */
1028 kiblnd_init_tx_msg(lnet_ni_t *ni, kib_tx_t *tx, int type, int body_nob)
1030 kib_hca_dev_t *hdev = tx->tx_pool->tpo_hdev;
1031 struct ib_sge *sge = &tx->tx_sge[tx->tx_nwrq];
1032 struct ib_rdma_wr *wrq = &tx->tx_wrq[tx->tx_nwrq];
1033 int nob = offsetof(kib_msg_t, ibm_u) + body_nob;
1034 struct ib_mr *mr = hdev->ibh_mrs;
1036 LASSERT(tx->tx_nwrq >= 0);
1037 LASSERT(tx->tx_nwrq < IBLND_MAX_RDMA_FRAGS + 1);
1038 LASSERT(nob <= IBLND_MSG_SIZE);
1041 kiblnd_init_msg(tx->tx_msg, type, body_nob);
1043 sge->lkey = mr->lkey;
1044 sge->addr = tx->tx_msgaddr;
1047 memset(wrq, 0, sizeof(*wrq));
1049 wrq->wr.next = NULL;
1050 wrq->wr.wr_id = kiblnd_ptr2wreqid(tx, IBLND_WID_TX);
1051 wrq->wr.sg_list = sge;
1052 wrq->wr.num_sge = 1;
1053 wrq->wr.opcode = IB_WR_SEND;
1054 wrq->wr.send_flags = IB_SEND_SIGNALED;
1060 kiblnd_init_rdma(kib_conn_t *conn, kib_tx_t *tx, int type,
1061 int resid, kib_rdma_desc_t *dstrd, __u64 dstcookie)
1063 kib_msg_t *ibmsg = tx->tx_msg;
1064 kib_rdma_desc_t *srcrd = tx->tx_rd;
1065 struct ib_sge *sge = &tx->tx_sge[0];
1066 struct ib_rdma_wr *wrq, *next;
1072 LASSERT(!in_interrupt());
1073 LASSERT(!tx->tx_nwrq);
1074 LASSERT(type == IBLND_MSG_GET_DONE ||
1075 type == IBLND_MSG_PUT_DONE);
1078 if (srcidx >= srcrd->rd_nfrags) {
1079 CERROR("Src buffer exhausted: %d frags\n", srcidx);
1084 if (dstidx == dstrd->rd_nfrags) {
1085 CERROR("Dst buffer exhausted: %d frags\n", dstidx);
1090 if (tx->tx_nwrq >= conn->ibc_max_frags) {
1091 CERROR("RDMA has too many fragments for peer %s (%d), src idx/frags: %d/%d dst idx/frags: %d/%d\n",
1092 libcfs_nid2str(conn->ibc_peer->ibp_nid),
1093 conn->ibc_max_frags,
1094 srcidx, srcrd->rd_nfrags,
1095 dstidx, dstrd->rd_nfrags);
1100 wrknob = min(min(kiblnd_rd_frag_size(srcrd, srcidx),
1101 kiblnd_rd_frag_size(dstrd, dstidx)),
1104 sge = &tx->tx_sge[tx->tx_nwrq];
1105 sge->addr = kiblnd_rd_frag_addr(srcrd, srcidx);
1106 sge->lkey = kiblnd_rd_frag_key(srcrd, srcidx);
1107 sge->length = wrknob;
1109 wrq = &tx->tx_wrq[tx->tx_nwrq];
1112 wrq->wr.next = &next->wr;
1113 wrq->wr.wr_id = kiblnd_ptr2wreqid(tx, IBLND_WID_RDMA);
1114 wrq->wr.sg_list = sge;
1115 wrq->wr.num_sge = 1;
1116 wrq->wr.opcode = IB_WR_RDMA_WRITE;
1117 wrq->wr.send_flags = 0;
1119 wrq->remote_addr = kiblnd_rd_frag_addr(dstrd, dstidx);
1120 wrq->rkey = kiblnd_rd_frag_key(dstrd, dstidx);
1122 srcidx = kiblnd_rd_consume_frag(srcrd, srcidx, wrknob);
1123 dstidx = kiblnd_rd_consume_frag(dstrd, dstidx, wrknob);
1132 if (rc < 0) /* no RDMA if completing with failure */
1135 ibmsg->ibm_u.completion.ibcm_status = rc;
1136 ibmsg->ibm_u.completion.ibcm_cookie = dstcookie;
1137 kiblnd_init_tx_msg(conn->ibc_peer->ibp_ni, tx,
1138 type, sizeof(kib_completion_msg_t));
1144 kiblnd_queue_tx_locked(kib_tx_t *tx, kib_conn_t *conn)
1146 struct list_head *q;
1148 LASSERT(tx->tx_nwrq > 0); /* work items set up */
1149 LASSERT(!tx->tx_queued); /* not queued for sending already */
1150 LASSERT(conn->ibc_state >= IBLND_CONN_ESTABLISHED);
1153 tx->tx_deadline = jiffies +
1154 msecs_to_jiffies(*kiblnd_tunables.kib_timeout *
1158 kiblnd_conn_addref(conn);
1160 LASSERT(tx->tx_msg->ibm_type != IBLND_MSG_PUT_DONE);
1162 /* PUT_DONE first attached to conn as a PUT_REQ */
1163 LASSERT(tx->tx_conn == conn);
1164 LASSERT(tx->tx_msg->ibm_type == IBLND_MSG_PUT_DONE);
1167 switch (tx->tx_msg->ibm_type) {
1171 case IBLND_MSG_PUT_REQ:
1172 case IBLND_MSG_GET_REQ:
1173 q = &conn->ibc_tx_queue_rsrvd;
1176 case IBLND_MSG_PUT_NAK:
1177 case IBLND_MSG_PUT_ACK:
1178 case IBLND_MSG_PUT_DONE:
1179 case IBLND_MSG_GET_DONE:
1180 q = &conn->ibc_tx_queue_nocred;
1183 case IBLND_MSG_NOOP:
1184 if (IBLND_OOB_CAPABLE(conn->ibc_version))
1185 q = &conn->ibc_tx_queue_nocred;
1187 q = &conn->ibc_tx_noops;
1190 case IBLND_MSG_IMMEDIATE:
1191 q = &conn->ibc_tx_queue;
1195 list_add_tail(&tx->tx_list, q);
1199 kiblnd_queue_tx(kib_tx_t *tx, kib_conn_t *conn)
1201 spin_lock(&conn->ibc_lock);
1202 kiblnd_queue_tx_locked(tx, conn);
1203 spin_unlock(&conn->ibc_lock);
1205 kiblnd_check_sends(conn);
1208 static int kiblnd_resolve_addr(struct rdma_cm_id *cmid,
1209 struct sockaddr_in *srcaddr,
1210 struct sockaddr_in *dstaddr,
1213 unsigned short port;
1216 /* allow the port to be reused */
1217 rc = rdma_set_reuseaddr(cmid, 1);
1219 CERROR("Unable to set reuse on cmid: %d\n", rc);
1223 /* look for a free privileged port */
1224 for (port = PROT_SOCK - 1; port > 0; port--) {
1225 srcaddr->sin_port = htons(port);
1226 rc = rdma_resolve_addr(cmid,
1227 (struct sockaddr *)srcaddr,
1228 (struct sockaddr *)dstaddr,
1231 CDEBUG(D_NET, "bound to port %hu\n", port);
1233 } else if (rc == -EADDRINUSE || rc == -EADDRNOTAVAIL) {
1234 CDEBUG(D_NET, "bind to port %hu failed: %d\n",
1241 CERROR("Failed to bind to a free privileged port\n");
1246 kiblnd_connect_peer(kib_peer_t *peer)
1248 struct rdma_cm_id *cmid;
1250 kib_net_t *net = peer->ibp_ni->ni_data;
1251 struct sockaddr_in srcaddr;
1252 struct sockaddr_in dstaddr;
1256 LASSERT(peer->ibp_connecting > 0);
1257 LASSERT(!peer->ibp_reconnecting);
1259 cmid = kiblnd_rdma_create_id(kiblnd_cm_callback, peer, RDMA_PS_TCP,
1263 CERROR("Can't create CMID for %s: %ld\n",
1264 libcfs_nid2str(peer->ibp_nid), PTR_ERR(cmid));
1270 memset(&srcaddr, 0, sizeof(srcaddr));
1271 srcaddr.sin_family = AF_INET;
1272 srcaddr.sin_addr.s_addr = htonl(dev->ibd_ifip);
1274 memset(&dstaddr, 0, sizeof(dstaddr));
1275 dstaddr.sin_family = AF_INET;
1276 dstaddr.sin_port = htons(*kiblnd_tunables.kib_service);
1277 dstaddr.sin_addr.s_addr = htonl(LNET_NIDADDR(peer->ibp_nid));
1279 kiblnd_peer_addref(peer); /* cmid's ref */
1281 if (*kiblnd_tunables.kib_use_priv_port) {
1282 rc = kiblnd_resolve_addr(cmid, &srcaddr, &dstaddr,
1283 *kiblnd_tunables.kib_timeout * 1000);
1285 rc = rdma_resolve_addr(cmid,
1286 (struct sockaddr *)&srcaddr,
1287 (struct sockaddr *)&dstaddr,
1288 *kiblnd_tunables.kib_timeout * 1000);
1291 /* Can't initiate address resolution: */
1292 CERROR("Can't resolve addr for %s: %d\n",
1293 libcfs_nid2str(peer->ibp_nid), rc);
1297 LASSERT(cmid->device);
1298 CDEBUG(D_NET, "%s: connection bound to %s:%pI4h:%s\n",
1299 libcfs_nid2str(peer->ibp_nid), dev->ibd_ifname,
1300 &dev->ibd_ifip, cmid->device->name);
1305 kiblnd_peer_connect_failed(peer, 1, rc);
1306 kiblnd_peer_decref(peer); /* cmid's ref */
1307 rdma_destroy_id(cmid);
1310 kiblnd_peer_connect_failed(peer, 1, rc);
1314 kiblnd_reconnect_peer(kib_peer_t *peer)
1316 rwlock_t *glock = &kiblnd_data.kib_global_lock;
1317 char *reason = NULL;
1318 struct list_head txs;
1319 unsigned long flags;
1321 INIT_LIST_HEAD(&txs);
1323 write_lock_irqsave(glock, flags);
1324 if (!peer->ibp_reconnecting) {
1325 if (peer->ibp_accepting)
1326 reason = "accepting";
1327 else if (peer->ibp_connecting)
1328 reason = "connecting";
1329 else if (!list_empty(&peer->ibp_conns))
1330 reason = "connected";
1331 else /* connected then closed */
1337 LASSERT(!peer->ibp_accepting && !peer->ibp_connecting &&
1338 list_empty(&peer->ibp_conns));
1339 peer->ibp_reconnecting = 0;
1341 if (!kiblnd_peer_active(peer)) {
1342 list_splice_init(&peer->ibp_tx_queue, &txs);
1343 reason = "unlinked";
1347 peer->ibp_connecting++;
1348 peer->ibp_reconnected++;
1349 write_unlock_irqrestore(glock, flags);
1351 kiblnd_connect_peer(peer);
1355 write_unlock_irqrestore(glock, flags);
1357 CWARN("Abort reconnection of %s: %s\n",
1358 libcfs_nid2str(peer->ibp_nid), reason);
1359 kiblnd_txlist_done(peer->ibp_ni, &txs, -ECONNABORTED);
1364 kiblnd_launch_tx(lnet_ni_t *ni, kib_tx_t *tx, lnet_nid_t nid)
1369 rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
1370 unsigned long flags;
1374 * If I get here, I've committed to send, so I complete the tx with
1375 * failure on any problems
1377 LASSERT(!tx || !tx->tx_conn); /* only set when assigned a conn */
1378 LASSERT(!tx || tx->tx_nwrq > 0); /* work items have been set up */
1381 * First time, just use a read lock since I expect to find my peer
1384 read_lock_irqsave(g_lock, flags);
1386 peer = kiblnd_find_peer_locked(nid);
1387 if (peer && !list_empty(&peer->ibp_conns)) {
1388 /* Found a peer with an established connection */
1389 conn = kiblnd_get_conn_locked(peer);
1390 kiblnd_conn_addref(conn); /* 1 ref for me... */
1392 read_unlock_irqrestore(g_lock, flags);
1395 kiblnd_queue_tx(tx, conn);
1396 kiblnd_conn_decref(conn); /* ...to here */
1400 read_unlock(g_lock);
1401 /* Re-try with a write lock */
1404 peer = kiblnd_find_peer_locked(nid);
1406 if (list_empty(&peer->ibp_conns)) {
1407 /* found a peer, but it's still connecting... */
1408 LASSERT(kiblnd_peer_connecting(peer));
1410 list_add_tail(&tx->tx_list,
1411 &peer->ibp_tx_queue);
1412 write_unlock_irqrestore(g_lock, flags);
1414 conn = kiblnd_get_conn_locked(peer);
1415 kiblnd_conn_addref(conn); /* 1 ref for me... */
1417 write_unlock_irqrestore(g_lock, flags);
1420 kiblnd_queue_tx(tx, conn);
1421 kiblnd_conn_decref(conn); /* ...to here */
1426 write_unlock_irqrestore(g_lock, flags);
1428 /* Allocate a peer ready to add to the peer table and retry */
1429 rc = kiblnd_create_peer(ni, &peer, nid);
1431 CERROR("Can't create peer %s\n", libcfs_nid2str(nid));
1433 tx->tx_status = -EHOSTUNREACH;
1435 kiblnd_tx_done(ni, tx);
1440 write_lock_irqsave(g_lock, flags);
1442 peer2 = kiblnd_find_peer_locked(nid);
1444 if (list_empty(&peer2->ibp_conns)) {
1445 /* found a peer, but it's still connecting... */
1446 LASSERT(kiblnd_peer_connecting(peer2));
1448 list_add_tail(&tx->tx_list,
1449 &peer2->ibp_tx_queue);
1450 write_unlock_irqrestore(g_lock, flags);
1452 conn = kiblnd_get_conn_locked(peer2);
1453 kiblnd_conn_addref(conn); /* 1 ref for me... */
1455 write_unlock_irqrestore(g_lock, flags);
1458 kiblnd_queue_tx(tx, conn);
1459 kiblnd_conn_decref(conn); /* ...to here */
1462 kiblnd_peer_decref(peer);
1466 /* Brand new peer */
1467 LASSERT(!peer->ibp_connecting);
1468 peer->ibp_connecting = 1;
1470 /* always called with a ref on ni, which prevents ni being shutdown */
1471 LASSERT(!((kib_net_t *)ni->ni_data)->ibn_shutdown);
1474 list_add_tail(&tx->tx_list, &peer->ibp_tx_queue);
1476 kiblnd_peer_addref(peer);
1477 list_add_tail(&peer->ibp_list, kiblnd_nid2peerlist(nid));
1479 write_unlock_irqrestore(g_lock, flags);
1481 kiblnd_connect_peer(peer);
1482 kiblnd_peer_decref(peer);
1486 kiblnd_send(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg)
1488 lnet_hdr_t *hdr = &lntmsg->msg_hdr;
1489 int type = lntmsg->msg_type;
1490 lnet_process_id_t target = lntmsg->msg_target;
1491 int target_is_router = lntmsg->msg_target_is_router;
1492 int routing = lntmsg->msg_routing;
1493 unsigned int payload_niov = lntmsg->msg_niov;
1494 struct kvec *payload_iov = lntmsg->msg_iov;
1495 lnet_kiov_t *payload_kiov = lntmsg->msg_kiov;
1496 unsigned int payload_offset = lntmsg->msg_offset;
1497 unsigned int payload_nob = lntmsg->msg_len;
1499 kib_rdma_desc_t *rd;
1504 /* NB 'private' is different depending on what we're sending.... */
1506 CDEBUG(D_NET, "sending %d bytes in %d frags to %s\n",
1507 payload_nob, payload_niov, libcfs_id2str(target));
1509 LASSERT(!payload_nob || payload_niov > 0);
1510 LASSERT(payload_niov <= LNET_MAX_IOV);
1512 /* Thread context */
1513 LASSERT(!in_interrupt());
1514 /* payload is either all vaddrs or all pages */
1515 LASSERT(!(payload_kiov && payload_iov));
1523 LASSERT(!payload_nob);
1527 if (routing || target_is_router)
1528 break; /* send IMMEDIATE */
1530 /* is the REPLY message too small for RDMA? */
1531 nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[lntmsg->msg_md->md_length]);
1532 if (nob <= IBLND_MSG_SIZE)
1533 break; /* send IMMEDIATE */
1535 tx = kiblnd_get_idle_tx(ni, target.nid);
1537 CERROR("Can't allocate txd for GET to %s\n",
1538 libcfs_nid2str(target.nid));
1543 rd = &ibmsg->ibm_u.get.ibgm_rd;
1544 if (!(lntmsg->msg_md->md_options & LNET_MD_KIOV))
1545 rc = kiblnd_setup_rd_iov(ni, tx, rd,
1546 lntmsg->msg_md->md_niov,
1547 lntmsg->msg_md->md_iov.iov,
1548 0, lntmsg->msg_md->md_length);
1550 rc = kiblnd_setup_rd_kiov(ni, tx, rd,
1551 lntmsg->msg_md->md_niov,
1552 lntmsg->msg_md->md_iov.kiov,
1553 0, lntmsg->msg_md->md_length);
1555 CERROR("Can't setup GET sink for %s: %d\n",
1556 libcfs_nid2str(target.nid), rc);
1557 kiblnd_tx_done(ni, tx);
1561 nob = offsetof(kib_get_msg_t, ibgm_rd.rd_frags[rd->rd_nfrags]);
1562 ibmsg->ibm_u.get.ibgm_cookie = tx->tx_cookie;
1563 ibmsg->ibm_u.get.ibgm_hdr = *hdr;
1565 kiblnd_init_tx_msg(ni, tx, IBLND_MSG_GET_REQ, nob);
1567 tx->tx_lntmsg[1] = lnet_create_reply_msg(ni, lntmsg);
1568 if (!tx->tx_lntmsg[1]) {
1569 CERROR("Can't create reply for GET -> %s\n",
1570 libcfs_nid2str(target.nid));
1571 kiblnd_tx_done(ni, tx);
1575 tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg[0,1] on completion */
1576 tx->tx_waiting = 1; /* waiting for GET_DONE */
1577 kiblnd_launch_tx(ni, tx, target.nid);
1580 case LNET_MSG_REPLY:
1582 /* Is the payload small enough not to need RDMA? */
1583 nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[payload_nob]);
1584 if (nob <= IBLND_MSG_SIZE)
1585 break; /* send IMMEDIATE */
1587 tx = kiblnd_get_idle_tx(ni, target.nid);
1589 CERROR("Can't allocate %s txd for %s\n",
1590 type == LNET_MSG_PUT ? "PUT" : "REPLY",
1591 libcfs_nid2str(target.nid));
1596 rc = kiblnd_setup_rd_iov(ni, tx, tx->tx_rd,
1597 payload_niov, payload_iov,
1598 payload_offset, payload_nob);
1600 rc = kiblnd_setup_rd_kiov(ni, tx, tx->tx_rd,
1601 payload_niov, payload_kiov,
1602 payload_offset, payload_nob);
1604 CERROR("Can't setup PUT src for %s: %d\n",
1605 libcfs_nid2str(target.nid), rc);
1606 kiblnd_tx_done(ni, tx);
1611 ibmsg->ibm_u.putreq.ibprm_hdr = *hdr;
1612 ibmsg->ibm_u.putreq.ibprm_cookie = tx->tx_cookie;
1613 kiblnd_init_tx_msg(ni, tx, IBLND_MSG_PUT_REQ, sizeof(kib_putreq_msg_t));
1615 tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */
1616 tx->tx_waiting = 1; /* waiting for PUT_{ACK,NAK} */
1617 kiblnd_launch_tx(ni, tx, target.nid);
1621 /* send IMMEDIATE */
1623 LASSERT(offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[payload_nob])
1626 tx = kiblnd_get_idle_tx(ni, target.nid);
1628 CERROR("Can't send %d to %s: tx descs exhausted\n",
1629 type, libcfs_nid2str(target.nid));
1634 ibmsg->ibm_u.immediate.ibim_hdr = *hdr;
1637 lnet_copy_kiov2flat(IBLND_MSG_SIZE, ibmsg,
1638 offsetof(kib_msg_t, ibm_u.immediate.ibim_payload),
1639 payload_niov, payload_kiov,
1640 payload_offset, payload_nob);
1642 lnet_copy_iov2flat(IBLND_MSG_SIZE, ibmsg,
1643 offsetof(kib_msg_t, ibm_u.immediate.ibim_payload),
1644 payload_niov, payload_iov,
1645 payload_offset, payload_nob);
1647 nob = offsetof(kib_immediate_msg_t, ibim_payload[payload_nob]);
1648 kiblnd_init_tx_msg(ni, tx, IBLND_MSG_IMMEDIATE, nob);
1650 tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */
1651 kiblnd_launch_tx(ni, tx, target.nid);
1656 kiblnd_reply(lnet_ni_t *ni, kib_rx_t *rx, lnet_msg_t *lntmsg)
1658 lnet_process_id_t target = lntmsg->msg_target;
1659 unsigned int niov = lntmsg->msg_niov;
1660 struct kvec *iov = lntmsg->msg_iov;
1661 lnet_kiov_t *kiov = lntmsg->msg_kiov;
1662 unsigned int offset = lntmsg->msg_offset;
1663 unsigned int nob = lntmsg->msg_len;
1667 tx = kiblnd_get_idle_tx(ni, rx->rx_conn->ibc_peer->ibp_nid);
1669 CERROR("Can't get tx for REPLY to %s\n",
1670 libcfs_nid2str(target.nid));
1677 rc = kiblnd_setup_rd_iov(ni, tx, tx->tx_rd,
1678 niov, iov, offset, nob);
1680 rc = kiblnd_setup_rd_kiov(ni, tx, tx->tx_rd,
1681 niov, kiov, offset, nob);
1684 CERROR("Can't setup GET src for %s: %d\n",
1685 libcfs_nid2str(target.nid), rc);
1689 rc = kiblnd_init_rdma(rx->rx_conn, tx,
1690 IBLND_MSG_GET_DONE, nob,
1691 &rx->rx_msg->ibm_u.get.ibgm_rd,
1692 rx->rx_msg->ibm_u.get.ibgm_cookie);
1694 CERROR("Can't setup rdma for GET from %s: %d\n",
1695 libcfs_nid2str(target.nid), rc);
1700 /* No RDMA: local completion may happen now! */
1701 lnet_finalize(ni, lntmsg, 0);
1703 /* RDMA: lnet_finalize(lntmsg) when it completes */
1704 tx->tx_lntmsg[0] = lntmsg;
1707 kiblnd_queue_tx(tx, rx->rx_conn);
1711 kiblnd_tx_done(ni, tx);
1713 lnet_finalize(ni, lntmsg, -EIO);
1717 kiblnd_recv(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg, int delayed,
1718 unsigned int niov, struct kvec *iov, lnet_kiov_t *kiov,
1719 unsigned int offset, unsigned int mlen, unsigned int rlen)
1721 kib_rx_t *rx = private;
1722 kib_msg_t *rxmsg = rx->rx_msg;
1723 kib_conn_t *conn = rx->rx_conn;
1726 int post_credit = IBLND_POSTRX_PEER_CREDIT;
1729 LASSERT(mlen <= rlen);
1730 LASSERT(!in_interrupt());
1731 /* Either all pages or all vaddrs */
1732 LASSERT(!(kiov && iov));
1734 switch (rxmsg->ibm_type) {
1738 case IBLND_MSG_IMMEDIATE:
1739 nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[rlen]);
1740 if (nob > rx->rx_nob) {
1741 CERROR("Immediate message from %s too big: %d(%d)\n",
1742 libcfs_nid2str(rxmsg->ibm_u.immediate.ibim_hdr.src_nid),
1749 lnet_copy_flat2kiov(niov, kiov, offset,
1750 IBLND_MSG_SIZE, rxmsg,
1751 offsetof(kib_msg_t, ibm_u.immediate.ibim_payload),
1754 lnet_copy_flat2iov(niov, iov, offset,
1755 IBLND_MSG_SIZE, rxmsg,
1756 offsetof(kib_msg_t, ibm_u.immediate.ibim_payload),
1758 lnet_finalize(ni, lntmsg, 0);
1761 case IBLND_MSG_PUT_REQ: {
1763 kib_rdma_desc_t *rd;
1766 lnet_finalize(ni, lntmsg, 0);
1767 kiblnd_send_completion(rx->rx_conn, IBLND_MSG_PUT_NAK, 0,
1768 rxmsg->ibm_u.putreq.ibprm_cookie);
1772 tx = kiblnd_get_idle_tx(ni, conn->ibc_peer->ibp_nid);
1774 CERROR("Can't allocate tx for %s\n",
1775 libcfs_nid2str(conn->ibc_peer->ibp_nid));
1776 /* Not replying will break the connection */
1782 rd = &txmsg->ibm_u.putack.ibpam_rd;
1784 rc = kiblnd_setup_rd_iov(ni, tx, rd,
1785 niov, iov, offset, mlen);
1787 rc = kiblnd_setup_rd_kiov(ni, tx, rd,
1788 niov, kiov, offset, mlen);
1790 CERROR("Can't setup PUT sink for %s: %d\n",
1791 libcfs_nid2str(conn->ibc_peer->ibp_nid), rc);
1792 kiblnd_tx_done(ni, tx);
1793 /* tell peer it's over */
1794 kiblnd_send_completion(rx->rx_conn, IBLND_MSG_PUT_NAK, rc,
1795 rxmsg->ibm_u.putreq.ibprm_cookie);
1799 nob = offsetof(kib_putack_msg_t, ibpam_rd.rd_frags[rd->rd_nfrags]);
1800 txmsg->ibm_u.putack.ibpam_src_cookie = rxmsg->ibm_u.putreq.ibprm_cookie;
1801 txmsg->ibm_u.putack.ibpam_dst_cookie = tx->tx_cookie;
1803 kiblnd_init_tx_msg(ni, tx, IBLND_MSG_PUT_ACK, nob);
1805 tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */
1806 tx->tx_waiting = 1; /* waiting for PUT_DONE */
1807 kiblnd_queue_tx(tx, conn);
1809 /* reposted buffer reserved for PUT_DONE */
1810 post_credit = IBLND_POSTRX_NO_CREDIT;
1814 case IBLND_MSG_GET_REQ:
1816 /* Optimized GET; RDMA lntmsg's payload */
1817 kiblnd_reply(ni, rx, lntmsg);
1819 /* GET didn't match anything */
1820 kiblnd_send_completion(rx->rx_conn, IBLND_MSG_GET_DONE,
1822 rxmsg->ibm_u.get.ibgm_cookie);
1827 kiblnd_post_rx(rx, post_credit);
1832 kiblnd_thread_start(int (*fn)(void *arg), void *arg, char *name)
1834 struct task_struct *task = kthread_run(fn, arg, "%s", name);
1837 return PTR_ERR(task);
1839 atomic_inc(&kiblnd_data.kib_nthreads);
1844 kiblnd_thread_fini(void)
1846 atomic_dec(&kiblnd_data.kib_nthreads);
1850 kiblnd_peer_alive(kib_peer_t *peer)
1852 /* This is racy, but everyone's only writing cfs_time_current() */
1853 peer->ibp_last_alive = cfs_time_current();
1858 kiblnd_peer_notify(kib_peer_t *peer)
1861 unsigned long last_alive = 0;
1862 unsigned long flags;
1864 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1866 if (kiblnd_peer_idle(peer) && peer->ibp_error) {
1867 error = peer->ibp_error;
1868 peer->ibp_error = 0;
1870 last_alive = peer->ibp_last_alive;
1873 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1876 lnet_notify(peer->ibp_ni,
1877 peer->ibp_nid, 0, last_alive);
1881 kiblnd_close_conn_locked(kib_conn_t *conn, int error)
1884 * This just does the immediate housekeeping. 'error' is zero for a
1885 * normal shutdown which can happen only after the connection has been
1886 * established. If the connection is established, schedule the
1887 * connection to be finished off by the connd. Otherwise the connd is
1888 * already dealing with it (either to set it up or tear it down).
1889 * Caller holds kib_global_lock exclusively in irq context
1891 kib_peer_t *peer = conn->ibc_peer;
1893 unsigned long flags;
1895 LASSERT(error || conn->ibc_state >= IBLND_CONN_ESTABLISHED);
1897 if (error && !conn->ibc_comms_error)
1898 conn->ibc_comms_error = error;
1900 if (conn->ibc_state != IBLND_CONN_ESTABLISHED)
1901 return; /* already being handled */
1904 list_empty(&conn->ibc_tx_noops) &&
1905 list_empty(&conn->ibc_tx_queue) &&
1906 list_empty(&conn->ibc_tx_queue_rsrvd) &&
1907 list_empty(&conn->ibc_tx_queue_nocred) &&
1908 list_empty(&conn->ibc_active_txs)) {
1909 CDEBUG(D_NET, "closing conn to %s\n",
1910 libcfs_nid2str(peer->ibp_nid));
1912 CNETERR("Closing conn to %s: error %d%s%s%s%s%s\n",
1913 libcfs_nid2str(peer->ibp_nid), error,
1914 list_empty(&conn->ibc_tx_queue) ? "" : "(sending)",
1915 list_empty(&conn->ibc_tx_noops) ? "" : "(sending_noops)",
1916 list_empty(&conn->ibc_tx_queue_rsrvd) ? "" : "(sending_rsrvd)",
1917 list_empty(&conn->ibc_tx_queue_nocred) ? "" : "(sending_nocred)",
1918 list_empty(&conn->ibc_active_txs) ? "" : "(waiting)");
1921 dev = ((kib_net_t *)peer->ibp_ni->ni_data)->ibn_dev;
1922 list_del(&conn->ibc_list);
1923 /* connd (see below) takes over ibc_list's ref */
1925 if (list_empty(&peer->ibp_conns) && /* no more conns */
1926 kiblnd_peer_active(peer)) { /* still in peer table */
1927 kiblnd_unlink_peer_locked(peer);
1929 /* set/clear error on last conn */
1930 peer->ibp_error = conn->ibc_comms_error;
1933 kiblnd_set_conn_state(conn, IBLND_CONN_CLOSING);
1936 kiblnd_dev_can_failover(dev)) {
1937 list_add_tail(&dev->ibd_fail_list,
1938 &kiblnd_data.kib_failed_devs);
1939 wake_up(&kiblnd_data.kib_failover_waitq);
1942 spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags);
1944 list_add_tail(&conn->ibc_list, &kiblnd_data.kib_connd_conns);
1945 wake_up(&kiblnd_data.kib_connd_waitq);
1947 spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags);
1951 kiblnd_close_conn(kib_conn_t *conn, int error)
1953 unsigned long flags;
1955 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1957 kiblnd_close_conn_locked(conn, error);
1959 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1963 kiblnd_handle_early_rxs(kib_conn_t *conn)
1965 unsigned long flags;
1969 LASSERT(!in_interrupt());
1970 LASSERT(conn->ibc_state >= IBLND_CONN_ESTABLISHED);
1972 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1973 list_for_each_entry_safe(rx, tmp, &conn->ibc_early_rxs, rx_list) {
1974 list_del(&rx->rx_list);
1975 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1977 kiblnd_handle_rx(rx);
1979 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1981 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1985 kiblnd_abort_txs(kib_conn_t *conn, struct list_head *txs)
1988 struct list_head *tmp;
1989 struct list_head *nxt;
1992 spin_lock(&conn->ibc_lock);
1994 list_for_each_safe(tmp, nxt, txs) {
1995 tx = list_entry(tmp, kib_tx_t, tx_list);
1997 if (txs == &conn->ibc_active_txs) {
1998 LASSERT(!tx->tx_queued);
1999 LASSERT(tx->tx_waiting || tx->tx_sending);
2001 LASSERT(tx->tx_queued);
2004 tx->tx_status = -ECONNABORTED;
2007 if (!tx->tx_sending) {
2009 list_del(&tx->tx_list);
2010 list_add(&tx->tx_list, &zombies);
2014 spin_unlock(&conn->ibc_lock);
2016 kiblnd_txlist_done(conn->ibc_peer->ibp_ni, &zombies, -ECONNABORTED);
2020 kiblnd_finalise_conn(kib_conn_t *conn)
2022 LASSERT(!in_interrupt());
2023 LASSERT(conn->ibc_state > IBLND_CONN_INIT);
2025 kiblnd_set_conn_state(conn, IBLND_CONN_DISCONNECTED);
2028 * abort_receives moves QP state to IB_QPS_ERR. This is only required
2029 * for connections that didn't get as far as being connected, because
2030 * rdma_disconnect() does this for free.
2032 kiblnd_abort_receives(conn);
2035 * Complete all tx descs not waiting for sends to complete.
2036 * NB we should be safe from RDMA now that the QP has changed state
2038 kiblnd_abort_txs(conn, &conn->ibc_tx_noops);
2039 kiblnd_abort_txs(conn, &conn->ibc_tx_queue);
2040 kiblnd_abort_txs(conn, &conn->ibc_tx_queue_rsrvd);
2041 kiblnd_abort_txs(conn, &conn->ibc_tx_queue_nocred);
2042 kiblnd_abort_txs(conn, &conn->ibc_active_txs);
2044 kiblnd_handle_early_rxs(conn);
2048 kiblnd_peer_connect_failed(kib_peer_t *peer, int active, int error)
2051 unsigned long flags;
2054 LASSERT(!in_interrupt());
2056 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2059 LASSERT(peer->ibp_connecting > 0);
2060 peer->ibp_connecting--;
2062 LASSERT(peer->ibp_accepting > 0);
2063 peer->ibp_accepting--;
2066 if (kiblnd_peer_connecting(peer)) {
2067 /* another connection attempt under way... */
2068 write_unlock_irqrestore(&kiblnd_data.kib_global_lock,
2073 peer->ibp_reconnected = 0;
2074 if (list_empty(&peer->ibp_conns)) {
2075 /* Take peer's blocked transmits to complete with error */
2076 list_add(&zombies, &peer->ibp_tx_queue);
2077 list_del_init(&peer->ibp_tx_queue);
2079 if (kiblnd_peer_active(peer))
2080 kiblnd_unlink_peer_locked(peer);
2082 peer->ibp_error = error;
2084 /* Can't have blocked transmits if there are connections */
2085 LASSERT(list_empty(&peer->ibp_tx_queue));
2088 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2090 kiblnd_peer_notify(peer);
2092 if (list_empty(&zombies))
2095 CNETERR("Deleting messages for %s: connection failed\n",
2096 libcfs_nid2str(peer->ibp_nid));
2098 kiblnd_txlist_done(peer->ibp_ni, &zombies, -EHOSTUNREACH);
2102 kiblnd_connreq_done(kib_conn_t *conn, int status)
2104 kib_peer_t *peer = conn->ibc_peer;
2107 struct list_head txs;
2108 unsigned long flags;
2111 active = (conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT);
2113 CDEBUG(D_NET, "%s: active(%d), version(%x), status(%d)\n",
2114 libcfs_nid2str(peer->ibp_nid), active,
2115 conn->ibc_version, status);
2117 LASSERT(!in_interrupt());
2118 LASSERT((conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT &&
2119 peer->ibp_connecting > 0) ||
2120 (conn->ibc_state == IBLND_CONN_PASSIVE_WAIT &&
2121 peer->ibp_accepting > 0));
2123 LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars));
2124 conn->ibc_connvars = NULL;
2127 /* failed to establish connection */
2128 kiblnd_peer_connect_failed(peer, active, status);
2129 kiblnd_finalise_conn(conn);
2133 /* connection established */
2134 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2136 conn->ibc_last_send = jiffies;
2137 kiblnd_set_conn_state(conn, IBLND_CONN_ESTABLISHED);
2138 kiblnd_peer_alive(peer);
2141 * Add conn to peer's list and nuke any dangling conns from a different
2144 kiblnd_conn_addref(conn); /* +1 ref for ibc_list */
2145 list_add(&conn->ibc_list, &peer->ibp_conns);
2146 peer->ibp_reconnected = 0;
2148 peer->ibp_connecting--;
2150 peer->ibp_accepting--;
2152 if (!peer->ibp_version) {
2153 peer->ibp_version = conn->ibc_version;
2154 peer->ibp_incarnation = conn->ibc_incarnation;
2157 if (peer->ibp_version != conn->ibc_version ||
2158 peer->ibp_incarnation != conn->ibc_incarnation) {
2159 kiblnd_close_stale_conns_locked(peer, conn->ibc_version,
2160 conn->ibc_incarnation);
2161 peer->ibp_version = conn->ibc_version;
2162 peer->ibp_incarnation = conn->ibc_incarnation;
2165 /* grab pending txs while I have the lock */
2166 list_add(&txs, &peer->ibp_tx_queue);
2167 list_del_init(&peer->ibp_tx_queue);
2169 if (!kiblnd_peer_active(peer) || /* peer has been deleted */
2170 conn->ibc_comms_error) { /* error has happened already */
2171 lnet_ni_t *ni = peer->ibp_ni;
2173 /* start to shut down connection */
2174 kiblnd_close_conn_locked(conn, -ECONNABORTED);
2175 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2177 kiblnd_txlist_done(ni, &txs, -ECONNABORTED);
2183 * refcount taken by cmid is not reliable after I released the glock
2184 * because this connection is visible to other threads now, another
2185 * thread can find and close this connection right after I released
2186 * the glock, if kiblnd_cm_callback for RDMA_CM_EVENT_DISCONNECTED is
2187 * called, it can release the connection refcount taken by cmid.
2188 * It means the connection could be destroyed before I finish my
2191 kiblnd_conn_addref(conn);
2192 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2194 /* Schedule blocked txs */
2195 spin_lock(&conn->ibc_lock);
2196 list_for_each_entry_safe(tx, tmp, &txs, tx_list) {
2197 list_del(&tx->tx_list);
2199 kiblnd_queue_tx_locked(tx, conn);
2201 spin_unlock(&conn->ibc_lock);
2203 kiblnd_check_sends(conn);
2205 /* schedule blocked rxs */
2206 kiblnd_handle_early_rxs(conn);
2208 kiblnd_conn_decref(conn);
2212 kiblnd_reject(struct rdma_cm_id *cmid, kib_rej_t *rej)
2216 rc = rdma_reject(cmid, rej, sizeof(*rej));
2219 CWARN("Error %d sending reject\n", rc);
2223 kiblnd_passive_connect(struct rdma_cm_id *cmid, void *priv, int priv_nob)
2225 rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
2226 kib_msg_t *reqmsg = priv;
2232 lnet_ni_t *ni = NULL;
2233 kib_net_t *net = NULL;
2235 struct rdma_conn_param cp;
2237 int version = IBLND_MSG_VERSION;
2238 unsigned long flags;
2240 struct sockaddr_in *peer_addr;
2242 LASSERT(!in_interrupt());
2244 /* cmid inherits 'context' from the corresponding listener id */
2245 ibdev = (kib_dev_t *)cmid->context;
2248 memset(&rej, 0, sizeof(rej));
2249 rej.ibr_magic = IBLND_MSG_MAGIC;
2250 rej.ibr_why = IBLND_REJECT_FATAL;
2251 rej.ibr_cp.ibcp_max_msg_size = IBLND_MSG_SIZE;
2253 peer_addr = (struct sockaddr_in *)&cmid->route.addr.dst_addr;
2254 if (*kiblnd_tunables.kib_require_priv_port &&
2255 ntohs(peer_addr->sin_port) >= PROT_SOCK) {
2256 __u32 ip = ntohl(peer_addr->sin_addr.s_addr);
2258 CERROR("Peer's port (%pI4h:%hu) is not privileged\n",
2259 &ip, ntohs(peer_addr->sin_port));
2263 if (priv_nob < offsetof(kib_msg_t, ibm_type)) {
2264 CERROR("Short connection request\n");
2269 * Future protocol version compatibility support! If the
2270 * o2iblnd-specific protocol changes, or when LNET unifies
2271 * protocols over all LNDs, the initial connection will
2272 * negotiate a protocol version. I trap this here to avoid
2273 * console errors; the reject tells the peer which protocol I
2276 if (reqmsg->ibm_magic == LNET_PROTO_MAGIC ||
2277 reqmsg->ibm_magic == __swab32(LNET_PROTO_MAGIC))
2279 if (reqmsg->ibm_magic == IBLND_MSG_MAGIC &&
2280 reqmsg->ibm_version != IBLND_MSG_VERSION &&
2281 reqmsg->ibm_version != IBLND_MSG_VERSION_1)
2283 if (reqmsg->ibm_magic == __swab32(IBLND_MSG_MAGIC) &&
2284 reqmsg->ibm_version != __swab16(IBLND_MSG_VERSION) &&
2285 reqmsg->ibm_version != __swab16(IBLND_MSG_VERSION_1))
2288 rc = kiblnd_unpack_msg(reqmsg, priv_nob);
2290 CERROR("Can't parse connection request: %d\n", rc);
2294 nid = reqmsg->ibm_srcnid;
2295 ni = lnet_net2ni(LNET_NIDNET(reqmsg->ibm_dstnid));
2298 net = (kib_net_t *)ni->ni_data;
2299 rej.ibr_incarnation = net->ibn_incarnation;
2302 if (!ni || /* no matching net */
2303 ni->ni_nid != reqmsg->ibm_dstnid || /* right NET, wrong NID! */
2304 net->ibn_dev != ibdev) { /* wrong device */
2305 CERROR("Can't accept conn from %s on %s (%s:%d:%pI4h): bad dst nid %s\n",
2306 libcfs_nid2str(nid),
2307 !ni ? "NA" : libcfs_nid2str(ni->ni_nid),
2308 ibdev->ibd_ifname, ibdev->ibd_nnets,
2310 libcfs_nid2str(reqmsg->ibm_dstnid));
2315 /* check time stamp as soon as possible */
2316 if (reqmsg->ibm_dststamp &&
2317 reqmsg->ibm_dststamp != net->ibn_incarnation) {
2318 CWARN("Stale connection request\n");
2319 rej.ibr_why = IBLND_REJECT_CONN_STALE;
2323 /* I can accept peer's version */
2324 version = reqmsg->ibm_version;
2326 if (reqmsg->ibm_type != IBLND_MSG_CONNREQ) {
2327 CERROR("Unexpected connreq msg type: %x from %s\n",
2328 reqmsg->ibm_type, libcfs_nid2str(nid));
2332 if (reqmsg->ibm_u.connparams.ibcp_queue_depth >
2333 kiblnd_msg_queue_size(version, ni)) {
2334 CERROR("Can't accept conn from %s, queue depth too large: %d (<=%d wanted)\n",
2335 libcfs_nid2str(nid),
2336 reqmsg->ibm_u.connparams.ibcp_queue_depth,
2337 kiblnd_msg_queue_size(version, ni));
2339 if (version == IBLND_MSG_VERSION)
2340 rej.ibr_why = IBLND_REJECT_MSG_QUEUE_SIZE;
2345 if (reqmsg->ibm_u.connparams.ibcp_max_frags >
2346 kiblnd_rdma_frags(version, ni)) {
2347 CWARN("Can't accept conn from %s (version %x): max_frags %d too large (%d wanted)\n",
2348 libcfs_nid2str(nid), version,
2349 reqmsg->ibm_u.connparams.ibcp_max_frags,
2350 kiblnd_rdma_frags(version, ni));
2352 if (version >= IBLND_MSG_VERSION)
2353 rej.ibr_why = IBLND_REJECT_RDMA_FRAGS;
2356 } else if (reqmsg->ibm_u.connparams.ibcp_max_frags <
2357 kiblnd_rdma_frags(version, ni) && !net->ibn_fmr_ps) {
2358 CWARN("Can't accept conn from %s (version %x): max_frags %d incompatible without FMR pool (%d wanted)\n",
2359 libcfs_nid2str(nid), version,
2360 reqmsg->ibm_u.connparams.ibcp_max_frags,
2361 kiblnd_rdma_frags(version, ni));
2363 if (version == IBLND_MSG_VERSION)
2364 rej.ibr_why = IBLND_REJECT_RDMA_FRAGS;
2369 if (reqmsg->ibm_u.connparams.ibcp_max_msg_size > IBLND_MSG_SIZE) {
2370 CERROR("Can't accept %s: message size %d too big (%d max)\n",
2371 libcfs_nid2str(nid),
2372 reqmsg->ibm_u.connparams.ibcp_max_msg_size,
2377 /* assume 'nid' is a new peer; create */
2378 rc = kiblnd_create_peer(ni, &peer, nid);
2380 CERROR("Can't create peer for %s\n", libcfs_nid2str(nid));
2381 rej.ibr_why = IBLND_REJECT_NO_RESOURCES;
2385 /* We have validated the peer's parameters so use those */
2386 peer->ibp_max_frags = reqmsg->ibm_u.connparams.ibcp_max_frags;
2387 peer->ibp_queue_depth = reqmsg->ibm_u.connparams.ibcp_queue_depth;
2389 write_lock_irqsave(g_lock, flags);
2391 peer2 = kiblnd_find_peer_locked(nid);
2393 if (!peer2->ibp_version) {
2394 peer2->ibp_version = version;
2395 peer2->ibp_incarnation = reqmsg->ibm_srcstamp;
2398 /* not the guy I've talked with */
2399 if (peer2->ibp_incarnation != reqmsg->ibm_srcstamp ||
2400 peer2->ibp_version != version) {
2401 kiblnd_close_peer_conns_locked(peer2, -ESTALE);
2403 if (kiblnd_peer_active(peer2)) {
2404 peer2->ibp_incarnation = reqmsg->ibm_srcstamp;
2405 peer2->ibp_version = version;
2407 write_unlock_irqrestore(g_lock, flags);
2409 CWARN("Conn stale %s version %x/%x incarnation %llu/%llu\n",
2410 libcfs_nid2str(nid), peer2->ibp_version, version,
2411 peer2->ibp_incarnation, reqmsg->ibm_srcstamp);
2413 kiblnd_peer_decref(peer);
2414 rej.ibr_why = IBLND_REJECT_CONN_STALE;
2418 /* tie-break connection race in favour of the higher NID */
2419 if (peer2->ibp_connecting &&
2421 write_unlock_irqrestore(g_lock, flags);
2423 CWARN("Conn race %s\n", libcfs_nid2str(peer2->ibp_nid));
2425 kiblnd_peer_decref(peer);
2426 rej.ibr_why = IBLND_REJECT_CONN_RACE;
2431 * passive connection is allowed even this peer is waiting for
2434 peer2->ibp_reconnecting = 0;
2435 peer2->ibp_accepting++;
2436 kiblnd_peer_addref(peer2);
2439 * Race with kiblnd_launch_tx (active connect) to create peer
2440 * so copy validated parameters since we now know what the
2443 peer2->ibp_max_frags = peer->ibp_max_frags;
2444 peer2->ibp_queue_depth = peer->ibp_queue_depth;
2446 write_unlock_irqrestore(g_lock, flags);
2447 kiblnd_peer_decref(peer);
2450 /* Brand new peer */
2451 LASSERT(!peer->ibp_accepting);
2452 LASSERT(!peer->ibp_version &&
2453 !peer->ibp_incarnation);
2455 peer->ibp_accepting = 1;
2456 peer->ibp_version = version;
2457 peer->ibp_incarnation = reqmsg->ibm_srcstamp;
2459 /* I have a ref on ni that prevents it being shutdown */
2460 LASSERT(!net->ibn_shutdown);
2462 kiblnd_peer_addref(peer);
2463 list_add_tail(&peer->ibp_list, kiblnd_nid2peerlist(nid));
2465 write_unlock_irqrestore(g_lock, flags);
2468 conn = kiblnd_create_conn(peer, cmid, IBLND_CONN_PASSIVE_WAIT,
2471 kiblnd_peer_connect_failed(peer, 0, -ENOMEM);
2472 kiblnd_peer_decref(peer);
2473 rej.ibr_why = IBLND_REJECT_NO_RESOURCES;
2478 * conn now "owns" cmid, so I return success from here on to ensure the
2479 * 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);
2527 rej.ibr_version = version;
2528 rej.ibr_cp.ibcp_queue_depth = kiblnd_msg_queue_size(version, ni);
2529 rej.ibr_cp.ibcp_max_frags = kiblnd_rdma_frags(version, ni);
2530 kiblnd_reject(cmid, &rej);
2532 return -ECONNREFUSED;
2536 kiblnd_check_reconnect(kib_conn_t *conn, int version,
2537 __u64 incarnation, int why, kib_connparams_t *cp)
2539 rwlock_t *glock = &kiblnd_data.kib_global_lock;
2540 kib_peer_t *peer = conn->ibc_peer;
2542 int msg_size = IBLND_MSG_SIZE;
2546 unsigned long flags;
2548 LASSERT(conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT);
2549 LASSERT(peer->ibp_connecting > 0); /* 'conn' at least */
2550 LASSERT(!peer->ibp_reconnecting);
2553 msg_size = cp->ibcp_max_msg_size;
2554 frag_num = cp->ibcp_max_frags;
2555 queue_dep = cp->ibcp_queue_depth;
2558 write_lock_irqsave(glock, flags);
2560 * retry connection if it's still needed and no other connection
2561 * attempts (active or passive) are in progress
2562 * NB: reconnect is still needed even when ibp_tx_queue is
2563 * empty if ibp_version != version because reconnect may be
2564 * 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;
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;
2632 peer->ibp_incarnation = incarnation;
2634 write_unlock_irqrestore(glock, 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) {
2697 * priv_nob is always 148 in current version
2698 * of OFED, so we still need to check version.
2699 * (define of IB_CM_REJ_PRIVATE_DATA_SIZE)
2704 __swab64s(&rej->ibr_incarnation);
2705 __swab16s(&cp->ibcp_queue_depth);
2706 __swab16s(&cp->ibcp_max_frags);
2707 __swab32s(&cp->ibcp_max_msg_size);
2710 incarnation = rej->ibr_incarnation;
2713 if (rej->ibr_magic != IBLND_MSG_MAGIC &&
2714 rej->ibr_magic != LNET_PROTO_MAGIC) {
2715 CERROR("%s rejected: consumer defined fatal error\n",
2716 libcfs_nid2str(peer->ibp_nid));
2720 if (rej->ibr_version != IBLND_MSG_VERSION &&
2721 rej->ibr_version != IBLND_MSG_VERSION_1) {
2722 CERROR("%s rejected: o2iblnd version %x error\n",
2723 libcfs_nid2str(peer->ibp_nid),
2728 if (rej->ibr_why == IBLND_REJECT_FATAL &&
2729 rej->ibr_version == IBLND_MSG_VERSION_1) {
2730 CDEBUG(D_NET, "rejected by old version peer %s: %x\n",
2731 libcfs_nid2str(peer->ibp_nid), rej->ibr_version);
2733 if (conn->ibc_version != IBLND_MSG_VERSION_1)
2734 rej->ibr_why = IBLND_REJECT_CONN_UNCOMPAT;
2737 switch (rej->ibr_why) {
2738 case IBLND_REJECT_CONN_RACE:
2739 case IBLND_REJECT_CONN_STALE:
2740 case IBLND_REJECT_CONN_UNCOMPAT:
2741 case IBLND_REJECT_MSG_QUEUE_SIZE:
2742 case IBLND_REJECT_RDMA_FRAGS:
2743 kiblnd_check_reconnect(conn, rej->ibr_version,
2748 case IBLND_REJECT_NO_RESOURCES:
2749 CERROR("%s rejected: o2iblnd no resources\n",
2750 libcfs_nid2str(peer->ibp_nid));
2753 case IBLND_REJECT_FATAL:
2754 CERROR("%s rejected: o2iblnd fatal error\n",
2755 libcfs_nid2str(peer->ibp_nid));
2759 CERROR("%s rejected: o2iblnd reason %d\n",
2760 libcfs_nid2str(peer->ibp_nid),
2768 CNETERR("%s rejected: reason %d, size %d\n",
2769 libcfs_nid2str(peer->ibp_nid), reason, priv_nob);
2773 kiblnd_connreq_done(conn, -ECONNREFUSED);
2777 kiblnd_check_connreply(kib_conn_t *conn, void *priv, int priv_nob)
2779 kib_peer_t *peer = conn->ibc_peer;
2780 lnet_ni_t *ni = peer->ibp_ni;
2781 kib_net_t *net = ni->ni_data;
2782 kib_msg_t *msg = priv;
2783 int ver = conn->ibc_version;
2784 int rc = kiblnd_unpack_msg(msg, priv_nob);
2785 unsigned long flags;
2790 CERROR("Can't unpack connack from %s: %d\n",
2791 libcfs_nid2str(peer->ibp_nid), rc);
2795 if (msg->ibm_type != IBLND_MSG_CONNACK) {
2796 CERROR("Unexpected message %d from %s\n",
2797 msg->ibm_type, libcfs_nid2str(peer->ibp_nid));
2802 if (ver != msg->ibm_version) {
2803 CERROR("%s replied version %x is different with requested version %x\n",
2804 libcfs_nid2str(peer->ibp_nid), msg->ibm_version, ver);
2809 if (msg->ibm_u.connparams.ibcp_queue_depth >
2810 conn->ibc_queue_depth) {
2811 CERROR("%s has incompatible queue depth %d (<=%d wanted)\n",
2812 libcfs_nid2str(peer->ibp_nid),
2813 msg->ibm_u.connparams.ibcp_queue_depth,
2814 conn->ibc_queue_depth);
2819 if (msg->ibm_u.connparams.ibcp_max_frags >
2820 conn->ibc_max_frags) {
2821 CERROR("%s has incompatible max_frags %d (<=%d wanted)\n",
2822 libcfs_nid2str(peer->ibp_nid),
2823 msg->ibm_u.connparams.ibcp_max_frags,
2824 conn->ibc_max_frags);
2829 if (msg->ibm_u.connparams.ibcp_max_msg_size > IBLND_MSG_SIZE) {
2830 CERROR("%s max message size %d too big (%d max)\n",
2831 libcfs_nid2str(peer->ibp_nid),
2832 msg->ibm_u.connparams.ibcp_max_msg_size,
2838 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2839 if (msg->ibm_dstnid == ni->ni_nid &&
2840 msg->ibm_dststamp == net->ibn_incarnation)
2844 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2847 CERROR("Bad connection reply from %s, rc = %d, version: %x max_frags: %d\n",
2848 libcfs_nid2str(peer->ibp_nid), rc,
2849 msg->ibm_version, msg->ibm_u.connparams.ibcp_max_frags);
2853 conn->ibc_incarnation = msg->ibm_srcstamp;
2854 conn->ibc_credits = msg->ibm_u.connparams.ibcp_queue_depth;
2855 conn->ibc_reserved_credits = msg->ibm_u.connparams.ibcp_queue_depth;
2856 conn->ibc_queue_depth = msg->ibm_u.connparams.ibcp_queue_depth;
2857 conn->ibc_max_frags = msg->ibm_u.connparams.ibcp_max_frags;
2858 LASSERT(conn->ibc_credits + conn->ibc_reserved_credits +
2859 IBLND_OOB_MSGS(ver) <= IBLND_RX_MSGS(conn));
2861 kiblnd_connreq_done(conn, 0);
2866 * NB My QP has already established itself, so I handle anything going
2867 * wrong here by setting ibc_comms_error.
2868 * kiblnd_connreq_done(0) moves the conn state to ESTABLISHED, but then
2869 * immediately tears it down.
2872 conn->ibc_comms_error = rc;
2873 kiblnd_connreq_done(conn, 0);
2877 kiblnd_active_connect(struct rdma_cm_id *cmid)
2879 kib_peer_t *peer = (kib_peer_t *)cmid->context;
2882 struct rdma_conn_param cp;
2885 unsigned long flags;
2888 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2890 incarnation = peer->ibp_incarnation;
2891 version = !peer->ibp_version ? IBLND_MSG_VERSION :
2894 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2896 conn = kiblnd_create_conn(peer, cmid, IBLND_CONN_ACTIVE_CONNECT,
2899 kiblnd_peer_connect_failed(peer, 1, -ENOMEM);
2900 kiblnd_peer_decref(peer); /* lose cmid's ref */
2905 * conn "owns" cmid now, so I return success from here on to ensure the
2906 * CM callback doesn't destroy cmid. conn also takes over cmid's ref
2909 msg = &conn->ibc_connvars->cv_msg;
2911 memset(msg, 0, sizeof(*msg));
2912 kiblnd_init_msg(msg, IBLND_MSG_CONNREQ, sizeof(msg->ibm_u.connparams));
2913 msg->ibm_u.connparams.ibcp_queue_depth = conn->ibc_queue_depth;
2914 msg->ibm_u.connparams.ibcp_max_frags = conn->ibc_max_frags;
2915 msg->ibm_u.connparams.ibcp_max_msg_size = IBLND_MSG_SIZE;
2917 kiblnd_pack_msg(peer->ibp_ni, msg, version,
2918 0, peer->ibp_nid, incarnation);
2920 memset(&cp, 0, sizeof(cp));
2921 cp.private_data = msg;
2922 cp.private_data_len = msg->ibm_nob;
2923 cp.responder_resources = 0; /* No atomic ops or RDMA reads */
2924 cp.initiator_depth = 0;
2925 cp.flow_control = 1;
2926 cp.retry_count = *kiblnd_tunables.kib_retry_count;
2927 cp.rnr_retry_count = *kiblnd_tunables.kib_rnr_retry_count;
2929 LASSERT(cmid->context == (void *)conn);
2930 LASSERT(conn->ibc_cmid == cmid);
2932 rc = rdma_connect(cmid, &cp);
2934 CERROR("Can't connect to %s: %d\n",
2935 libcfs_nid2str(peer->ibp_nid), rc);
2936 kiblnd_connreq_done(conn, rc);
2937 kiblnd_conn_decref(conn);
2944 kiblnd_cm_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event)
2950 switch (event->event) {
2952 CERROR("Unexpected event: %d, status: %d\n",
2953 event->event, event->status);
2956 case RDMA_CM_EVENT_CONNECT_REQUEST:
2957 /* destroy cmid on failure */
2958 rc = kiblnd_passive_connect(cmid,
2959 (void *)KIBLND_CONN_PARAM(event),
2960 KIBLND_CONN_PARAM_LEN(event));
2961 CDEBUG(D_NET, "connreq: %d\n", rc);
2964 case RDMA_CM_EVENT_ADDR_ERROR:
2965 peer = (kib_peer_t *)cmid->context;
2966 CNETERR("%s: ADDR ERROR %d\n",
2967 libcfs_nid2str(peer->ibp_nid), event->status);
2968 kiblnd_peer_connect_failed(peer, 1, -EHOSTUNREACH);
2969 kiblnd_peer_decref(peer);
2970 return -EHOSTUNREACH; /* rc destroys cmid */
2972 case RDMA_CM_EVENT_ADDR_RESOLVED:
2973 peer = (kib_peer_t *)cmid->context;
2975 CDEBUG(D_NET, "%s Addr resolved: %d\n",
2976 libcfs_nid2str(peer->ibp_nid), event->status);
2978 if (event->status) {
2979 CNETERR("Can't resolve address for %s: %d\n",
2980 libcfs_nid2str(peer->ibp_nid), event->status);
2983 rc = rdma_resolve_route(
2984 cmid, *kiblnd_tunables.kib_timeout * 1000);
2987 /* Can't initiate route resolution */
2988 CERROR("Can't resolve route for %s: %d\n",
2989 libcfs_nid2str(peer->ibp_nid), rc);
2991 kiblnd_peer_connect_failed(peer, 1, rc);
2992 kiblnd_peer_decref(peer);
2993 return rc; /* rc destroys cmid */
2995 case RDMA_CM_EVENT_ROUTE_ERROR:
2996 peer = (kib_peer_t *)cmid->context;
2997 CNETERR("%s: ROUTE ERROR %d\n",
2998 libcfs_nid2str(peer->ibp_nid), event->status);
2999 kiblnd_peer_connect_failed(peer, 1, -EHOSTUNREACH);
3000 kiblnd_peer_decref(peer);
3001 return -EHOSTUNREACH; /* rc destroys cmid */
3003 case RDMA_CM_EVENT_ROUTE_RESOLVED:
3004 peer = (kib_peer_t *)cmid->context;
3005 CDEBUG(D_NET, "%s Route resolved: %d\n",
3006 libcfs_nid2str(peer->ibp_nid), event->status);
3009 return kiblnd_active_connect(cmid);
3011 CNETERR("Can't resolve route for %s: %d\n",
3012 libcfs_nid2str(peer->ibp_nid), event->status);
3013 kiblnd_peer_connect_failed(peer, 1, event->status);
3014 kiblnd_peer_decref(peer);
3015 return event->status; /* rc destroys cmid */
3017 case RDMA_CM_EVENT_UNREACHABLE:
3018 conn = (kib_conn_t *)cmid->context;
3019 LASSERT(conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT ||
3020 conn->ibc_state == IBLND_CONN_PASSIVE_WAIT);
3021 CNETERR("%s: UNREACHABLE %d\n",
3022 libcfs_nid2str(conn->ibc_peer->ibp_nid), event->status);
3023 kiblnd_connreq_done(conn, -ENETDOWN);
3024 kiblnd_conn_decref(conn);
3027 case RDMA_CM_EVENT_CONNECT_ERROR:
3028 conn = (kib_conn_t *)cmid->context;
3029 LASSERT(conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT ||
3030 conn->ibc_state == IBLND_CONN_PASSIVE_WAIT);
3031 CNETERR("%s: CONNECT ERROR %d\n",
3032 libcfs_nid2str(conn->ibc_peer->ibp_nid), event->status);
3033 kiblnd_connreq_done(conn, -ENOTCONN);
3034 kiblnd_conn_decref(conn);
3037 case RDMA_CM_EVENT_REJECTED:
3038 conn = (kib_conn_t *)cmid->context;
3039 switch (conn->ibc_state) {
3043 case IBLND_CONN_PASSIVE_WAIT:
3044 CERROR("%s: REJECTED %d\n",
3045 libcfs_nid2str(conn->ibc_peer->ibp_nid),
3047 kiblnd_connreq_done(conn, -ECONNRESET);
3050 case IBLND_CONN_ACTIVE_CONNECT:
3051 kiblnd_rejected(conn, event->status,
3052 (void *)KIBLND_CONN_PARAM(event),
3053 KIBLND_CONN_PARAM_LEN(event));
3056 kiblnd_conn_decref(conn);
3059 case RDMA_CM_EVENT_ESTABLISHED:
3060 conn = (kib_conn_t *)cmid->context;
3061 switch (conn->ibc_state) {
3065 case IBLND_CONN_PASSIVE_WAIT:
3066 CDEBUG(D_NET, "ESTABLISHED (passive): %s\n",
3067 libcfs_nid2str(conn->ibc_peer->ibp_nid));
3068 kiblnd_connreq_done(conn, 0);
3071 case IBLND_CONN_ACTIVE_CONNECT:
3072 CDEBUG(D_NET, "ESTABLISHED(active): %s\n",
3073 libcfs_nid2str(conn->ibc_peer->ibp_nid));
3074 kiblnd_check_connreply(conn,
3075 (void *)KIBLND_CONN_PARAM(event),
3076 KIBLND_CONN_PARAM_LEN(event));
3079 /* net keeps its ref on conn! */
3082 case RDMA_CM_EVENT_TIMEWAIT_EXIT:
3083 CDEBUG(D_NET, "Ignore TIMEWAIT_EXIT event\n");
3085 case RDMA_CM_EVENT_DISCONNECTED:
3086 conn = (kib_conn_t *)cmid->context;
3087 if (conn->ibc_state < IBLND_CONN_ESTABLISHED) {
3088 CERROR("%s DISCONNECTED\n",
3089 libcfs_nid2str(conn->ibc_peer->ibp_nid));
3090 kiblnd_connreq_done(conn, -ECONNRESET);
3092 kiblnd_close_conn(conn, 0);
3094 kiblnd_conn_decref(conn);
3095 cmid->context = NULL;
3098 case RDMA_CM_EVENT_DEVICE_REMOVAL:
3099 LCONSOLE_ERROR_MSG(0x131,
3100 "Received notification of device removal\n"
3101 "Please shutdown LNET to allow this to proceed\n");
3103 * Can't remove network from underneath LNET for now, so I have
3108 case RDMA_CM_EVENT_ADDR_CHANGE:
3109 LCONSOLE_INFO("Physical link changed (eg hca/port)\n");
3115 kiblnd_check_txs_locked(kib_conn_t *conn, struct list_head *txs)
3118 struct list_head *ttmp;
3120 list_for_each(ttmp, txs) {
3121 tx = list_entry(ttmp, kib_tx_t, tx_list);
3123 if (txs != &conn->ibc_active_txs) {
3124 LASSERT(tx->tx_queued);
3126 LASSERT(!tx->tx_queued);
3127 LASSERT(tx->tx_waiting || tx->tx_sending);
3130 if (cfs_time_aftereq(jiffies, tx->tx_deadline)) {
3131 CERROR("Timed out tx: %s, %lu seconds\n",
3132 kiblnd_queue2str(conn, txs),
3133 cfs_duration_sec(jiffies - tx->tx_deadline));
3142 kiblnd_conn_timed_out_locked(kib_conn_t *conn)
3144 return kiblnd_check_txs_locked(conn, &conn->ibc_tx_queue) ||
3145 kiblnd_check_txs_locked(conn, &conn->ibc_tx_noops) ||
3146 kiblnd_check_txs_locked(conn, &conn->ibc_tx_queue_rsrvd) ||
3147 kiblnd_check_txs_locked(conn, &conn->ibc_tx_queue_nocred) ||
3148 kiblnd_check_txs_locked(conn, &conn->ibc_active_txs);
3152 kiblnd_check_conns(int idx)
3155 LIST_HEAD(checksends);
3156 struct list_head *peers = &kiblnd_data.kib_peers[idx];
3157 struct list_head *ptmp;
3162 struct list_head *ctmp;
3163 unsigned long flags;
3166 * NB. We expect to have a look at all the peers and not find any
3167 * RDMAs to time out, so we just use a shared lock while we
3170 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
3172 list_for_each(ptmp, peers) {
3173 peer = list_entry(ptmp, kib_peer_t, ibp_list);
3175 list_for_each(ctmp, &peer->ibp_conns) {
3179 conn = list_entry(ctmp, kib_conn_t, ibc_list);
3181 LASSERT(conn->ibc_state == IBLND_CONN_ESTABLISHED);
3183 spin_lock(&conn->ibc_lock);
3185 sendnoop = kiblnd_need_noop(conn);
3186 timedout = kiblnd_conn_timed_out_locked(conn);
3187 if (!sendnoop && !timedout) {
3188 spin_unlock(&conn->ibc_lock);
3193 CERROR("Timed out RDMA with %s (%lu): c: %u, oc: %u, rc: %u\n",
3194 libcfs_nid2str(peer->ibp_nid),
3195 cfs_duration_sec(cfs_time_current() -
3196 peer->ibp_last_alive),
3198 conn->ibc_outstanding_credits,
3199 conn->ibc_reserved_credits);
3200 list_add(&conn->ibc_connd_list, &closes);
3202 list_add(&conn->ibc_connd_list, &checksends);
3204 /* +ref for 'closes' or 'checksends' */
3205 kiblnd_conn_addref(conn);
3207 spin_unlock(&conn->ibc_lock);
3211 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
3214 * Handle timeout by closing the whole
3215 * connection. We can only be sure RDMA activity
3216 * has ceased once the QP has been modified.
3218 list_for_each_entry_safe(conn, tmp, &closes, ibc_connd_list) {
3219 list_del(&conn->ibc_connd_list);
3220 kiblnd_close_conn(conn, -ETIMEDOUT);
3221 kiblnd_conn_decref(conn);
3225 * In case we have enough credits to return via a
3226 * NOOP, but there were no non-blocking tx descs
3227 * free to do it last time...
3229 list_for_each_entry_safe(conn, temp, &checksends, ibc_connd_list) {
3230 list_del(&conn->ibc_connd_list);
3231 kiblnd_check_sends(conn);
3232 kiblnd_conn_decref(conn);
3237 kiblnd_disconnect_conn(kib_conn_t *conn)
3239 LASSERT(!in_interrupt());
3240 LASSERT(current == kiblnd_data.kib_connd);
3241 LASSERT(conn->ibc_state == IBLND_CONN_CLOSING);
3243 rdma_disconnect(conn->ibc_cmid);
3244 kiblnd_finalise_conn(conn);
3246 kiblnd_peer_notify(conn->ibc_peer);
3250 * High-water for reconnection to the same peer, reconnection attempt should
3251 * be delayed after trying more than KIB_RECONN_HIGH_RACE.
3253 #define KIB_RECONN_HIGH_RACE 10
3255 * Allow connd to take a break and handle other things after consecutive
3256 * reconnection attemps.
3258 #define KIB_RECONN_BREAK 100
3261 kiblnd_connd(void *arg)
3263 spinlock_t *lock= &kiblnd_data.kib_connd_lock;
3265 unsigned long flags;
3271 unsigned long deadline = jiffies;
3273 cfs_block_allsigs();
3275 init_waitqueue_entry(&wait, current);
3276 kiblnd_data.kib_connd = current;
3278 spin_lock_irqsave(lock, flags);
3280 while (!kiblnd_data.kib_shutdown) {
3285 if (!list_empty(&kiblnd_data.kib_connd_zombies)) {
3286 kib_peer_t *peer = NULL;
3288 conn = list_entry(kiblnd_data.kib_connd_zombies.next,
3289 kib_conn_t, ibc_list);
3290 list_del(&conn->ibc_list);
3291 if (conn->ibc_reconnect) {
3292 peer = conn->ibc_peer;
3293 kiblnd_peer_addref(peer);
3296 spin_unlock_irqrestore(lock, flags);
3299 kiblnd_destroy_conn(conn, !peer);
3301 spin_lock_irqsave(lock, flags);
3305 conn->ibc_peer = peer;
3306 if (peer->ibp_reconnected < KIB_RECONN_HIGH_RACE)
3307 list_add_tail(&conn->ibc_list,
3308 &kiblnd_data.kib_reconn_list);
3310 list_add_tail(&conn->ibc_list,
3311 &kiblnd_data.kib_reconn_wait);
3314 if (!list_empty(&kiblnd_data.kib_connd_conns)) {
3315 conn = list_entry(kiblnd_data.kib_connd_conns.next,
3316 kib_conn_t, ibc_list);
3317 list_del(&conn->ibc_list);
3319 spin_unlock_irqrestore(lock, flags);
3322 kiblnd_disconnect_conn(conn);
3323 kiblnd_conn_decref(conn);
3325 spin_lock_irqsave(lock, flags);
3328 while (reconn < KIB_RECONN_BREAK) {
3329 if (kiblnd_data.kib_reconn_sec !=
3330 ktime_get_real_seconds()) {
3331 kiblnd_data.kib_reconn_sec = ktime_get_real_seconds();
3332 list_splice_init(&kiblnd_data.kib_reconn_wait,
3333 &kiblnd_data.kib_reconn_list);
3336 if (list_empty(&kiblnd_data.kib_reconn_list))
3339 conn = list_entry(kiblnd_data.kib_reconn_list.next,
3340 kib_conn_t, ibc_list);
3341 list_del(&conn->ibc_list);
3343 spin_unlock_irqrestore(lock, flags);
3346 reconn += kiblnd_reconnect_peer(conn->ibc_peer);
3347 kiblnd_peer_decref(conn->ibc_peer);
3348 LIBCFS_FREE(conn, sizeof(*conn));
3350 spin_lock_irqsave(lock, flags);
3353 /* careful with the jiffy wrap... */
3354 timeout = (int)(deadline - jiffies);
3358 int chunk = kiblnd_data.kib_peer_hash_size;
3360 spin_unlock_irqrestore(lock, flags);
3364 * Time to check for RDMA timeouts on a few more
3365 * peers: I do checks every 'p' seconds on a
3366 * proportion of the peer table and I need to check
3367 * every connection 'n' times within a timeout
3368 * interval, to ensure I detect a timeout on any
3369 * connection within (n+1)/n times the timeout
3372 if (*kiblnd_tunables.kib_timeout > n * p)
3373 chunk = (chunk * n * p) /
3374 *kiblnd_tunables.kib_timeout;
3378 for (i = 0; i < chunk; i++) {
3379 kiblnd_check_conns(peer_index);
3380 peer_index = (peer_index + 1) %
3381 kiblnd_data.kib_peer_hash_size;
3384 deadline += msecs_to_jiffies(p * MSEC_PER_SEC);
3385 spin_lock_irqsave(lock, flags);
3391 /* Nothing to do for 'timeout' */
3392 set_current_state(TASK_INTERRUPTIBLE);
3393 add_wait_queue(&kiblnd_data.kib_connd_waitq, &wait);
3394 spin_unlock_irqrestore(lock, flags);
3396 schedule_timeout(timeout);
3398 remove_wait_queue(&kiblnd_data.kib_connd_waitq, &wait);
3399 spin_lock_irqsave(lock, flags);
3402 spin_unlock_irqrestore(lock, flags);
3404 kiblnd_thread_fini();
3409 kiblnd_qp_event(struct ib_event *event, void *arg)
3411 kib_conn_t *conn = arg;
3413 switch (event->event) {
3414 case IB_EVENT_COMM_EST:
3415 CDEBUG(D_NET, "%s established\n",
3416 libcfs_nid2str(conn->ibc_peer->ibp_nid));
3420 CERROR("%s: Async QP event type %d\n",
3421 libcfs_nid2str(conn->ibc_peer->ibp_nid), event->event);
3427 kiblnd_complete(struct ib_wc *wc)
3429 switch (kiblnd_wreqid2type(wc->wr_id)) {
3434 if (wc->status != IB_WC_SUCCESS &&
3435 wc->status != IB_WC_WR_FLUSH_ERR)
3436 CNETERR("FastReg failed: %d\n", wc->status);
3439 case IBLND_WID_RDMA:
3441 * We only get RDMA completion notification if it fails. All
3442 * subsequent work items, including the final SEND will fail
3443 * too. However we can't print out any more info about the
3444 * failing RDMA because 'tx' might be back on the idle list or
3445 * even reused already if we didn't manage to post all our work
3448 CNETERR("RDMA (tx: %p) failed: %d\n",
3449 kiblnd_wreqid2ptr(wc->wr_id), wc->status);
3453 kiblnd_tx_complete(kiblnd_wreqid2ptr(wc->wr_id), wc->status);
3457 kiblnd_rx_complete(kiblnd_wreqid2ptr(wc->wr_id), wc->status,
3464 kiblnd_cq_completion(struct ib_cq *cq, void *arg)
3467 * NB I'm not allowed to schedule this conn once its refcount has
3468 * reached 0. Since fundamentally I'm racing with scheduler threads
3469 * consuming my CQ I could be called after all completions have
3470 * occurred. But in this case, !ibc_nrx && !ibc_nsends_posted
3471 * and this CQ is about to be destroyed so I NOOP.
3473 kib_conn_t *conn = arg;
3474 struct kib_sched_info *sched = conn->ibc_sched;
3475 unsigned long flags;
3477 LASSERT(cq == conn->ibc_cq);
3479 spin_lock_irqsave(&sched->ibs_lock, flags);
3481 conn->ibc_ready = 1;
3483 if (!conn->ibc_scheduled &&
3484 (conn->ibc_nrx > 0 ||
3485 conn->ibc_nsends_posted > 0)) {
3486 kiblnd_conn_addref(conn); /* +1 ref for sched_conns */
3487 conn->ibc_scheduled = 1;
3488 list_add_tail(&conn->ibc_sched_list, &sched->ibs_conns);
3490 if (waitqueue_active(&sched->ibs_waitq))
3491 wake_up(&sched->ibs_waitq);
3494 spin_unlock_irqrestore(&sched->ibs_lock, flags);
3498 kiblnd_cq_event(struct ib_event *event, void *arg)
3500 kib_conn_t *conn = arg;
3502 CERROR("%s: async CQ event type %d\n",
3503 libcfs_nid2str(conn->ibc_peer->ibp_nid), event->event);
3507 kiblnd_scheduler(void *arg)
3509 long id = (long)arg;
3510 struct kib_sched_info *sched;
3513 unsigned long flags;
3519 cfs_block_allsigs();
3521 init_waitqueue_entry(&wait, current);
3523 sched = kiblnd_data.kib_scheds[KIB_THREAD_CPT(id)];
3525 rc = cfs_cpt_bind(lnet_cpt_table(), sched->ibs_cpt);
3527 CWARN("Failed to bind on CPT %d, please verify whether all CPUs are healthy and reload modules if necessary, otherwise your system might under risk of low performance\n",
3531 spin_lock_irqsave(&sched->ibs_lock, flags);
3533 while (!kiblnd_data.kib_shutdown) {
3534 if (busy_loops++ >= IBLND_RESCHED) {
3535 spin_unlock_irqrestore(&sched->ibs_lock, flags);
3540 spin_lock_irqsave(&sched->ibs_lock, flags);
3545 if (!list_empty(&sched->ibs_conns)) {
3546 conn = list_entry(sched->ibs_conns.next, kib_conn_t,
3548 /* take over kib_sched_conns' ref on conn... */
3549 LASSERT(conn->ibc_scheduled);
3550 list_del(&conn->ibc_sched_list);
3551 conn->ibc_ready = 0;
3553 spin_unlock_irqrestore(&sched->ibs_lock, flags);
3555 wc.wr_id = IBLND_WID_INVAL;
3557 rc = ib_poll_cq(conn->ibc_cq, 1, &wc);
3559 rc = ib_req_notify_cq(conn->ibc_cq,
3562 CWARN("%s: ib_req_notify_cq failed: %d, closing connection\n",
3563 libcfs_nid2str(conn->ibc_peer->ibp_nid), rc);
3564 kiblnd_close_conn(conn, -EIO);
3565 kiblnd_conn_decref(conn);
3566 spin_lock_irqsave(&sched->ibs_lock,
3571 rc = ib_poll_cq(conn->ibc_cq, 1, &wc);
3574 if (unlikely(rc > 0 && wc.wr_id == IBLND_WID_INVAL)) {
3575 LCONSOLE_ERROR("ib_poll_cq (rc: %d) returned invalid wr_id, opcode %d, status: %d, vendor_err: %d, conn: %s status: %d\nplease upgrade firmware and OFED or contact vendor.\n",
3576 rc, wc.opcode, wc.status,
3578 libcfs_nid2str(conn->ibc_peer->ibp_nid),
3584 CWARN("%s: ib_poll_cq failed: %d, closing connection\n",
3585 libcfs_nid2str(conn->ibc_peer->ibp_nid),
3587 kiblnd_close_conn(conn, -EIO);
3588 kiblnd_conn_decref(conn);
3589 spin_lock_irqsave(&sched->ibs_lock, flags);
3593 spin_lock_irqsave(&sched->ibs_lock, flags);
3595 if (rc || conn->ibc_ready) {
3597 * There may be another completion waiting; get
3598 * another scheduler to check while I handle
3601 /* +1 ref for sched_conns */
3602 kiblnd_conn_addref(conn);
3603 list_add_tail(&conn->ibc_sched_list,
3605 if (waitqueue_active(&sched->ibs_waitq))
3606 wake_up(&sched->ibs_waitq);
3608 conn->ibc_scheduled = 0;
3612 spin_unlock_irqrestore(&sched->ibs_lock, flags);
3613 kiblnd_complete(&wc);
3615 spin_lock_irqsave(&sched->ibs_lock, flags);
3618 kiblnd_conn_decref(conn); /* ...drop my ref from above */
3625 set_current_state(TASK_INTERRUPTIBLE);
3626 add_wait_queue_exclusive(&sched->ibs_waitq, &wait);
3627 spin_unlock_irqrestore(&sched->ibs_lock, flags);
3632 remove_wait_queue(&sched->ibs_waitq, &wait);
3633 spin_lock_irqsave(&sched->ibs_lock, flags);
3636 spin_unlock_irqrestore(&sched->ibs_lock, flags);
3638 kiblnd_thread_fini();
3643 kiblnd_failover_thread(void *arg)
3645 rwlock_t *glock = &kiblnd_data.kib_global_lock;
3648 unsigned long flags;
3651 LASSERT(*kiblnd_tunables.kib_dev_failover);
3653 cfs_block_allsigs();
3655 init_waitqueue_entry(&wait, current);
3656 write_lock_irqsave(glock, flags);
3658 while (!kiblnd_data.kib_shutdown) {
3659 int do_failover = 0;
3662 list_for_each_entry(dev, &kiblnd_data.kib_failed_devs,
3664 if (time_before(cfs_time_current(),
3665 dev->ibd_next_failover))
3672 list_del_init(&dev->ibd_fail_list);
3673 dev->ibd_failover = 1;
3674 write_unlock_irqrestore(glock, flags);
3676 rc = kiblnd_dev_failover(dev);
3678 write_lock_irqsave(glock, flags);
3680 LASSERT(dev->ibd_failover);
3681 dev->ibd_failover = 0;
3682 if (rc >= 0) { /* Device is OK or failover succeed */
3683 dev->ibd_next_failover = cfs_time_shift(3);
3687 /* failed to failover, retry later */
3688 dev->ibd_next_failover =
3689 cfs_time_shift(min(dev->ibd_failed_failover, 10));
3690 if (kiblnd_dev_can_failover(dev)) {
3691 list_add_tail(&dev->ibd_fail_list,
3692 &kiblnd_data.kib_failed_devs);
3698 /* long sleep if no more pending failover */
3699 long_sleep = list_empty(&kiblnd_data.kib_failed_devs);
3701 set_current_state(TASK_INTERRUPTIBLE);
3702 add_wait_queue(&kiblnd_data.kib_failover_waitq, &wait);
3703 write_unlock_irqrestore(glock, flags);
3705 rc = schedule_timeout(long_sleep ? cfs_time_seconds(10) :
3706 cfs_time_seconds(1));
3707 remove_wait_queue(&kiblnd_data.kib_failover_waitq, &wait);
3708 write_lock_irqsave(glock, flags);
3710 if (!long_sleep || rc)
3714 * have a long sleep, routine check all active devices,
3715 * we need checking like this because if there is not active
3716 * connection on the dev and no SEND from local, we may listen
3717 * on wrong HCA for ever while there is a bonding failover
3719 list_for_each_entry(dev, &kiblnd_data.kib_devs, ibd_list) {
3720 if (kiblnd_dev_can_failover(dev)) {
3721 list_add_tail(&dev->ibd_fail_list,
3722 &kiblnd_data.kib_failed_devs);
3727 write_unlock_irqrestore(glock, flags);
3729 kiblnd_thread_fini();