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, 2014, 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 IBLND_MSG_QUEUE_SIZE(conn->ibc_version)) {
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 IBLND_MSG_QUEUE_SIZE(conn->ibc_version));
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, int nob)
568 __u64 *pages = tx->tx_pages;
569 kib_fmr_poolset_t *fps;
576 LASSERT(tx->tx_pool != NULL);
577 LASSERT(tx->tx_pool->tpo_pool.po_owner != NULL);
579 hdev = tx->tx_pool->tpo_hdev;
581 for (i = 0, npages = 0; i < rd->rd_nfrags; i++) {
582 for (size = 0; size < rd->rd_frags[i].rf_nob;
583 size += hdev->ibh_page_size) {
584 pages[npages ++] = (rd->rd_frags[i].rf_addr &
585 hdev->ibh_page_mask) + size;
589 cpt = tx->tx_pool->tpo_pool.po_owner->ps_cpt;
591 fps = net->ibn_fmr_ps[cpt];
592 rc = kiblnd_fmr_pool_map(fps, pages, npages, 0, &tx->fmr);
594 CERROR ("Can't map %d pages: %d\n", npages, rc);
598 /* If rd is not tx_rd, it's going to get sent to a peer, who will need
600 rd->rd_key = (rd != tx->tx_rd) ? tx->fmr.fmr_pfmr->fmr->rkey :
601 tx->fmr.fmr_pfmr->fmr->lkey;
602 rd->rd_frags[0].rf_addr &= ~hdev->ibh_page_mask;
603 rd->rd_frags[0].rf_nob = nob;
610 kiblnd_unmap_tx(lnet_ni_t *ni, kib_tx_t *tx)
612 kib_net_t *net = ni->ni_data;
614 LASSERT(net != NULL);
616 if (net->ibn_fmr_ps != NULL && tx->fmr.fmr_pfmr != NULL) {
617 kiblnd_fmr_pool_unmap(&tx->fmr, tx->tx_status);
618 tx->fmr.fmr_pfmr = NULL;
621 if (tx->tx_nfrags != 0) {
622 kiblnd_dma_unmap_sg(tx->tx_pool->tpo_hdev->ibh_ibdev,
623 tx->tx_frags, tx->tx_nfrags, tx->tx_dmadir);
629 kiblnd_map_tx(lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd, int nfrags)
631 kib_hca_dev_t *hdev = tx->tx_pool->tpo_hdev;
632 kib_net_t *net = ni->ni_data;
633 struct ib_mr *mr = NULL;
637 /* If rd is not tx_rd, it's going to get sent to a peer and I'm the
639 tx->tx_dmadir = (rd != tx->tx_rd) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
640 tx->tx_nfrags = nfrags;
642 rd->rd_nfrags = kiblnd_dma_map_sg(hdev->ibh_ibdev, tx->tx_frags,
643 tx->tx_nfrags, tx->tx_dmadir);
645 for (i = 0, nob = 0; i < rd->rd_nfrags; i++) {
646 rd->rd_frags[i].rf_nob = kiblnd_sg_dma_len(
647 hdev->ibh_ibdev, &tx->tx_frags[i]);
648 rd->rd_frags[i].rf_addr = kiblnd_sg_dma_address(
649 hdev->ibh_ibdev, &tx->tx_frags[i]);
650 nob += rd->rd_frags[i].rf_nob;
653 /* looking for pre-mapping MR */
654 mr = kiblnd_find_rd_dma_mr(hdev, rd);
656 /* found pre-mapping MR */
657 rd->rd_key = (rd != tx->tx_rd) ? mr->rkey : mr->lkey;
661 if (net->ibn_fmr_ps != NULL)
662 return kiblnd_fmr_map_tx(net, tx, rd, nob);
669 kiblnd_setup_rd_iov(lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd,
670 unsigned int niov, struct iovec *iov, int offset, int nob)
672 kib_net_t *net = ni->ni_data;
674 struct scatterlist *sg;
681 LASSERT (net != NULL);
683 while (offset >= iov->iov_len) {
684 offset -= iov->iov_len;
694 vaddr = ((unsigned long)iov->iov_base) + offset;
695 page_offset = vaddr & (PAGE_SIZE - 1);
696 page = kiblnd_kvaddr_to_page(vaddr);
698 CERROR ("Can't find page\n");
702 fragnob = min((int)(iov->iov_len - offset), nob);
703 fragnob = min(fragnob, (int)PAGE_SIZE - page_offset);
705 sg_set_page(sg, page, fragnob, page_offset);
708 if (offset + fragnob < iov->iov_len) {
718 return kiblnd_map_tx(ni, tx, rd, sg - tx->tx_frags);
722 kiblnd_setup_rd_kiov (lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd,
723 int nkiov, lnet_kiov_t *kiov, int offset, int nob)
725 kib_net_t *net = ni->ni_data;
726 struct scatterlist *sg;
729 CDEBUG(D_NET, "niov %d offset %d nob %d\n", nkiov, offset, nob);
733 LASSERT (net != NULL);
735 while (offset >= kiov->kiov_len) {
736 offset -= kiov->kiov_len;
746 fragnob = min((int)(kiov->kiov_len - offset), nob);
748 sg_set_page(sg, kiov->kiov_page, fragnob,
749 kiov->kiov_offset + offset);
758 return kiblnd_map_tx(ni, tx, rd, sg - tx->tx_frags);
762 kiblnd_post_tx_locked (kib_conn_t *conn, kib_tx_t *tx, int credit)
763 __must_hold(&conn->ibc_lock)
765 kib_msg_t *msg = tx->tx_msg;
766 kib_peer_t *peer = conn->ibc_peer;
767 int ver = conn->ibc_version;
770 struct ib_send_wr *bad_wrq;
772 LASSERT (tx->tx_queued);
773 /* We rely on this for QP sizing */
774 LASSERT (tx->tx_nwrq > 0);
775 LASSERT (tx->tx_nwrq <= 1 + IBLND_RDMA_FRAGS(ver));
777 LASSERT (credit == 0 || credit == 1);
778 LASSERT (conn->ibc_outstanding_credits >= 0);
779 LASSERT (conn->ibc_outstanding_credits <= IBLND_MSG_QUEUE_SIZE(ver));
780 LASSERT (conn->ibc_credits >= 0);
781 LASSERT (conn->ibc_credits <= IBLND_MSG_QUEUE_SIZE(ver));
783 if (conn->ibc_nsends_posted == IBLND_CONCURRENT_SENDS(ver)) {
784 /* tx completions outstanding... */
785 CDEBUG(D_NET, "%s: posted enough\n",
786 libcfs_nid2str(peer->ibp_nid));
790 if (credit != 0 && conn->ibc_credits == 0) { /* no credits */
791 CDEBUG(D_NET, "%s: no credits\n",
792 libcfs_nid2str(peer->ibp_nid));
796 if (credit != 0 && !IBLND_OOB_CAPABLE(ver) &&
797 conn->ibc_credits == 1 && /* last credit reserved */
798 msg->ibm_type != IBLND_MSG_NOOP) { /* for NOOP */
799 CDEBUG(D_NET, "%s: not using last credit\n",
800 libcfs_nid2str(peer->ibp_nid));
804 /* NB don't drop ibc_lock before bumping tx_sending */
805 list_del(&tx->tx_list);
808 if (msg->ibm_type == IBLND_MSG_NOOP &&
809 (!kiblnd_need_noop(conn) || /* redundant NOOP */
810 (IBLND_OOB_CAPABLE(ver) && /* posted enough NOOP */
811 conn->ibc_noops_posted == IBLND_OOB_MSGS(ver)))) {
812 /* OK to drop when posted enough NOOPs, since
813 * kiblnd_check_sends will queue NOOP again when
814 * posted NOOPs complete */
815 spin_unlock(&conn->ibc_lock);
816 kiblnd_tx_done(peer->ibp_ni, tx);
817 spin_lock(&conn->ibc_lock);
818 CDEBUG(D_NET, "%s(%d): redundant or enough NOOP\n",
819 libcfs_nid2str(peer->ibp_nid),
820 conn->ibc_noops_posted);
824 kiblnd_pack_msg(peer->ibp_ni, msg, ver, conn->ibc_outstanding_credits,
825 peer->ibp_nid, conn->ibc_incarnation);
827 conn->ibc_credits -= credit;
828 conn->ibc_outstanding_credits = 0;
829 conn->ibc_nsends_posted++;
830 if (msg->ibm_type == IBLND_MSG_NOOP)
831 conn->ibc_noops_posted++;
833 /* CAVEAT EMPTOR! This tx could be the PUT_DONE of an RDMA
834 * PUT. If so, it was first queued here as a PUT_REQ, sent and
835 * stashed on ibc_active_txs, matched by an incoming PUT_ACK,
836 * and then re-queued here. It's (just) possible that
837 * tx_sending is non-zero if we've not done the tx_complete()
838 * from the first send; hence the ++ rather than = below. */
840 list_add(&tx->tx_list, &conn->ibc_active_txs);
842 /* I'm still holding ibc_lock! */
843 if (conn->ibc_state != IBLND_CONN_ESTABLISHED) {
845 } else if (tx->tx_pool->tpo_pool.po_failed ||
846 conn->ibc_hdev != tx->tx_pool->tpo_hdev) {
847 /* close_conn will launch failover */
850 rc = ib_post_send(conn->ibc_cmid->qp,
851 tx->tx_wrq, &bad_wrq);
854 conn->ibc_last_send = jiffies;
859 /* NB credits are transferred in the actual
860 * message, which can only be the last work item */
861 conn->ibc_credits += credit;
862 conn->ibc_outstanding_credits += msg->ibm_credits;
863 conn->ibc_nsends_posted--;
864 if (msg->ibm_type == IBLND_MSG_NOOP)
865 conn->ibc_noops_posted--;
871 done = (tx->tx_sending == 0);
873 list_del(&tx->tx_list);
875 spin_unlock(&conn->ibc_lock);
877 if (conn->ibc_state == IBLND_CONN_ESTABLISHED)
878 CERROR("Error %d posting transmit to %s\n",
879 rc, libcfs_nid2str(peer->ibp_nid));
881 CDEBUG(D_NET, "Error %d posting transmit to %s\n",
882 rc, libcfs_nid2str(peer->ibp_nid));
884 kiblnd_close_conn(conn, rc);
887 kiblnd_tx_done(peer->ibp_ni, tx);
889 spin_lock(&conn->ibc_lock);
895 kiblnd_check_sends (kib_conn_t *conn)
897 int ver = conn->ibc_version;
898 lnet_ni_t *ni = conn->ibc_peer->ibp_ni;
901 /* Don't send anything until after the connection is established */
902 if (conn->ibc_state < IBLND_CONN_ESTABLISHED) {
903 CDEBUG(D_NET, "%s too soon\n",
904 libcfs_nid2str(conn->ibc_peer->ibp_nid));
908 spin_lock(&conn->ibc_lock);
910 LASSERT (conn->ibc_nsends_posted <= IBLND_CONCURRENT_SENDS(ver));
911 LASSERT (!IBLND_OOB_CAPABLE(ver) ||
912 conn->ibc_noops_posted <= IBLND_OOB_MSGS(ver));
913 LASSERT (conn->ibc_reserved_credits >= 0);
915 while (conn->ibc_reserved_credits > 0 &&
916 !list_empty(&conn->ibc_tx_queue_rsrvd)) {
917 tx = list_entry(conn->ibc_tx_queue_rsrvd.next,
919 list_del(&tx->tx_list);
920 list_add_tail(&tx->tx_list, &conn->ibc_tx_queue);
921 conn->ibc_reserved_credits--;
924 if (kiblnd_need_noop(conn)) {
925 spin_unlock(&conn->ibc_lock);
927 tx = kiblnd_get_idle_tx(ni, conn->ibc_peer->ibp_nid);
929 kiblnd_init_tx_msg(ni, tx, IBLND_MSG_NOOP, 0);
931 spin_lock(&conn->ibc_lock);
933 kiblnd_queue_tx_locked(tx, conn);
936 kiblnd_conn_addref(conn); /* 1 ref for me.... (see b21911) */
941 if (!list_empty(&conn->ibc_tx_queue_nocred)) {
943 tx = list_entry(conn->ibc_tx_queue_nocred.next,
945 } else if (!list_empty(&conn->ibc_tx_noops)) {
946 LASSERT (!IBLND_OOB_CAPABLE(ver));
948 tx = list_entry(conn->ibc_tx_noops.next,
950 } else if (!list_empty(&conn->ibc_tx_queue)) {
952 tx = list_entry(conn->ibc_tx_queue.next,
957 if (kiblnd_post_tx_locked(conn, tx, credit) != 0)
961 spin_unlock(&conn->ibc_lock);
963 kiblnd_conn_decref(conn); /* ...until here */
967 kiblnd_tx_complete (kib_tx_t *tx, int status)
969 int failed = (status != IB_WC_SUCCESS);
970 kib_conn_t *conn = tx->tx_conn;
973 LASSERT (tx->tx_sending > 0);
976 if (conn->ibc_state == IBLND_CONN_ESTABLISHED)
977 CNETERR("Tx -> %s cookie "LPX64
978 " sending %d waiting %d: failed %d\n",
979 libcfs_nid2str(conn->ibc_peer->ibp_nid),
980 tx->tx_cookie, tx->tx_sending, tx->tx_waiting,
983 kiblnd_close_conn(conn, -EIO);
985 kiblnd_peer_alive(conn->ibc_peer);
988 spin_lock(&conn->ibc_lock);
990 /* I could be racing with rdma completion. Whoever makes 'tx' idle
991 * gets to free it, which also drops its ref on 'conn'. */
994 conn->ibc_nsends_posted--;
995 if (tx->tx_msg->ibm_type == IBLND_MSG_NOOP)
996 conn->ibc_noops_posted--;
999 tx->tx_waiting = 0; /* don't wait for peer */
1000 tx->tx_status = -EIO;
1003 idle = (tx->tx_sending == 0) && /* This is the final callback */
1004 !tx->tx_waiting && /* Not waiting for peer */
1005 !tx->tx_queued; /* Not re-queued (PUT_DONE) */
1007 list_del(&tx->tx_list);
1009 kiblnd_conn_addref(conn); /* 1 ref for me.... */
1011 spin_unlock(&conn->ibc_lock);
1014 kiblnd_tx_done(conn->ibc_peer->ibp_ni, tx);
1016 kiblnd_check_sends(conn);
1018 kiblnd_conn_decref(conn); /* ...until here */
1022 kiblnd_init_tx_msg (lnet_ni_t *ni, kib_tx_t *tx, int type, int body_nob)
1024 kib_hca_dev_t *hdev = tx->tx_pool->tpo_hdev;
1025 struct ib_sge *sge = &tx->tx_sge[tx->tx_nwrq];
1026 struct ib_send_wr *wrq = &tx->tx_wrq[tx->tx_nwrq];
1027 int nob = offsetof (kib_msg_t, ibm_u) + body_nob;
1028 struct ib_mr *mr = hdev->ibh_mrs;
1030 LASSERT (tx->tx_nwrq >= 0);
1031 LASSERT (tx->tx_nwrq < IBLND_MAX_RDMA_FRAGS + 1);
1032 LASSERT (nob <= IBLND_MSG_SIZE);
1033 LASSERT(mr != NULL);
1035 kiblnd_init_msg(tx->tx_msg, type, body_nob);
1037 sge->lkey = mr->lkey;
1038 sge->addr = tx->tx_msgaddr;
1041 memset(wrq, 0, sizeof(*wrq));
1044 wrq->wr_id = kiblnd_ptr2wreqid(tx, IBLND_WID_TX);
1047 wrq->opcode = IB_WR_SEND;
1048 wrq->send_flags = IB_SEND_SIGNALED;
1054 kiblnd_init_rdma(kib_conn_t *conn, kib_tx_t *tx, int type,
1055 int resid, kib_rdma_desc_t *dstrd, __u64 dstcookie)
1057 kib_msg_t *ibmsg = tx->tx_msg;
1058 kib_rdma_desc_t *srcrd = tx->tx_rd;
1059 struct ib_sge *sge = &tx->tx_sge[0];
1060 struct ib_send_wr *wrq = &tx->tx_wrq[0];
1066 LASSERT (!in_interrupt());
1067 LASSERT (tx->tx_nwrq == 0);
1068 LASSERT (type == IBLND_MSG_GET_DONE ||
1069 type == IBLND_MSG_PUT_DONE);
1071 srcidx = dstidx = 0;
1074 if (srcidx >= srcrd->rd_nfrags) {
1075 CERROR("Src buffer exhausted: %d frags\n", srcidx);
1080 if (dstidx == dstrd->rd_nfrags) {
1081 CERROR("Dst buffer exhausted: %d frags\n", dstidx);
1086 if (tx->tx_nwrq == IBLND_RDMA_FRAGS(conn->ibc_version)) {
1087 CERROR("RDMA too fragmented for %s (%d): "
1088 "%d/%d src %d/%d dst frags\n",
1089 libcfs_nid2str(conn->ibc_peer->ibp_nid),
1090 IBLND_RDMA_FRAGS(conn->ibc_version),
1091 srcidx, srcrd->rd_nfrags,
1092 dstidx, dstrd->rd_nfrags);
1097 wrknob = MIN(MIN(kiblnd_rd_frag_size(srcrd, srcidx),
1098 kiblnd_rd_frag_size(dstrd, dstidx)), resid);
1100 sge = &tx->tx_sge[tx->tx_nwrq];
1101 sge->addr = kiblnd_rd_frag_addr(srcrd, srcidx);
1102 sge->lkey = kiblnd_rd_frag_key(srcrd, srcidx);
1103 sge->length = wrknob;
1105 wrq = &tx->tx_wrq[tx->tx_nwrq];
1107 wrq->next = wrq + 1;
1108 wrq->wr_id = kiblnd_ptr2wreqid(tx, IBLND_WID_RDMA);
1111 wrq->opcode = IB_WR_RDMA_WRITE;
1112 wrq->send_flags = 0;
1114 wrq->wr.rdma.remote_addr = kiblnd_rd_frag_addr(dstrd, dstidx);
1115 wrq->wr.rdma.rkey = kiblnd_rd_frag_key(dstrd, dstidx);
1117 srcidx = kiblnd_rd_consume_frag(srcrd, srcidx, wrknob);
1118 dstidx = kiblnd_rd_consume_frag(dstrd, dstidx, wrknob);
1127 if (rc < 0) /* no RDMA if completing with failure */
1130 ibmsg->ibm_u.completion.ibcm_status = rc;
1131 ibmsg->ibm_u.completion.ibcm_cookie = dstcookie;
1132 kiblnd_init_tx_msg(conn->ibc_peer->ibp_ni, tx,
1133 type, sizeof (kib_completion_msg_t));
1139 kiblnd_queue_tx_locked(kib_tx_t *tx, kib_conn_t *conn)
1141 struct list_head *q;
1143 LASSERT(tx->tx_nwrq > 0); /* work items set up */
1144 LASSERT(!tx->tx_queued); /* not queued for sending already */
1145 LASSERT(conn->ibc_state >= IBLND_CONN_ESTABLISHED);
1148 tx->tx_deadline = jiffies +
1149 msecs_to_jiffies(*kiblnd_tunables.kib_timeout *
1152 if (tx->tx_conn == NULL) {
1153 kiblnd_conn_addref(conn);
1155 LASSERT (tx->tx_msg->ibm_type != IBLND_MSG_PUT_DONE);
1157 /* PUT_DONE first attached to conn as a PUT_REQ */
1158 LASSERT (tx->tx_conn == conn);
1159 LASSERT (tx->tx_msg->ibm_type == IBLND_MSG_PUT_DONE);
1162 switch (tx->tx_msg->ibm_type) {
1166 case IBLND_MSG_PUT_REQ:
1167 case IBLND_MSG_GET_REQ:
1168 q = &conn->ibc_tx_queue_rsrvd;
1171 case IBLND_MSG_PUT_NAK:
1172 case IBLND_MSG_PUT_ACK:
1173 case IBLND_MSG_PUT_DONE:
1174 case IBLND_MSG_GET_DONE:
1175 q = &conn->ibc_tx_queue_nocred;
1178 case IBLND_MSG_NOOP:
1179 if (IBLND_OOB_CAPABLE(conn->ibc_version))
1180 q = &conn->ibc_tx_queue_nocred;
1182 q = &conn->ibc_tx_noops;
1185 case IBLND_MSG_IMMEDIATE:
1186 q = &conn->ibc_tx_queue;
1190 list_add_tail(&tx->tx_list, q);
1194 kiblnd_queue_tx (kib_tx_t *tx, kib_conn_t *conn)
1196 spin_lock(&conn->ibc_lock);
1197 kiblnd_queue_tx_locked(tx, conn);
1198 spin_unlock(&conn->ibc_lock);
1200 kiblnd_check_sends(conn);
1203 static int kiblnd_resolve_addr(struct rdma_cm_id *cmid,
1204 struct sockaddr_in *srcaddr,
1205 struct sockaddr_in *dstaddr,
1208 unsigned short port;
1211 /* allow the port to be reused */
1212 rc = rdma_set_reuseaddr(cmid, 1);
1214 CERROR("Unable to set reuse on cmid: %d\n", rc);
1218 /* look for a free privileged port */
1219 for (port = PROT_SOCK-1; port > 0; port--) {
1220 srcaddr->sin_port = htons(port);
1221 rc = rdma_resolve_addr(cmid,
1222 (struct sockaddr *)srcaddr,
1223 (struct sockaddr *)dstaddr,
1226 CDEBUG(D_NET, "bound to port %hu\n", port);
1228 } else if (rc == -EADDRINUSE || rc == -EADDRNOTAVAIL) {
1229 CDEBUG(D_NET, "bind to port %hu failed: %d\n",
1236 CERROR("Failed to bind to a free privileged port\n");
1241 kiblnd_connect_peer (kib_peer_t *peer)
1243 struct rdma_cm_id *cmid;
1245 kib_net_t *net = peer->ibp_ni->ni_data;
1246 struct sockaddr_in srcaddr;
1247 struct sockaddr_in dstaddr;
1250 LASSERT (net != NULL);
1251 LASSERT (peer->ibp_connecting > 0);
1253 cmid = kiblnd_rdma_create_id(kiblnd_cm_callback, peer, RDMA_PS_TCP,
1257 CERROR("Can't create CMID for %s: %ld\n",
1258 libcfs_nid2str(peer->ibp_nid), PTR_ERR(cmid));
1264 memset(&srcaddr, 0, sizeof(srcaddr));
1265 srcaddr.sin_family = AF_INET;
1266 srcaddr.sin_addr.s_addr = htonl(dev->ibd_ifip);
1268 memset(&dstaddr, 0, sizeof(dstaddr));
1269 dstaddr.sin_family = AF_INET;
1270 dstaddr.sin_port = htons(*kiblnd_tunables.kib_service);
1271 dstaddr.sin_addr.s_addr = htonl(LNET_NIDADDR(peer->ibp_nid));
1273 kiblnd_peer_addref(peer); /* cmid's ref */
1275 if (*kiblnd_tunables.kib_use_priv_port) {
1276 rc = kiblnd_resolve_addr(cmid, &srcaddr, &dstaddr,
1277 *kiblnd_tunables.kib_timeout * 1000);
1279 rc = rdma_resolve_addr(cmid,
1280 (struct sockaddr *)&srcaddr,
1281 (struct sockaddr *)&dstaddr,
1282 *kiblnd_tunables.kib_timeout * 1000);
1285 /* Can't initiate address resolution: */
1286 CERROR("Can't resolve addr for %s: %d\n",
1287 libcfs_nid2str(peer->ibp_nid), rc);
1291 LASSERT (cmid->device != NULL);
1292 CDEBUG(D_NET, "%s: connection bound to %s:%pI4h:%s\n",
1293 libcfs_nid2str(peer->ibp_nid), dev->ibd_ifname,
1294 &dev->ibd_ifip, cmid->device->name);
1299 kiblnd_peer_decref(peer); /* cmid's ref */
1300 rdma_destroy_id(cmid);
1302 kiblnd_peer_connect_failed(peer, 1, rc);
1306 kiblnd_launch_tx (lnet_ni_t *ni, kib_tx_t *tx, lnet_nid_t nid)
1311 rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
1312 unsigned long flags;
1315 /* If I get here, I've committed to send, so I complete the tx with
1316 * failure on any problems */
1318 LASSERT (tx == NULL || tx->tx_conn == NULL); /* only set when assigned a conn */
1319 LASSERT (tx == NULL || tx->tx_nwrq > 0); /* work items have been set up */
1321 /* First time, just use a read lock since I expect to find my peer
1323 read_lock_irqsave(g_lock, flags);
1325 peer = kiblnd_find_peer_locked(nid);
1326 if (peer != NULL && !list_empty(&peer->ibp_conns)) {
1327 /* Found a peer with an established connection */
1328 conn = kiblnd_get_conn_locked(peer);
1329 kiblnd_conn_addref(conn); /* 1 ref for me... */
1331 read_unlock_irqrestore(g_lock, flags);
1334 kiblnd_queue_tx(tx, conn);
1335 kiblnd_conn_decref(conn); /* ...to here */
1339 read_unlock(g_lock);
1340 /* Re-try with a write lock */
1343 peer = kiblnd_find_peer_locked(nid);
1345 if (list_empty(&peer->ibp_conns)) {
1346 /* found a peer, but it's still connecting... */
1347 LASSERT (peer->ibp_connecting != 0 ||
1348 peer->ibp_accepting != 0);
1350 list_add_tail(&tx->tx_list,
1351 &peer->ibp_tx_queue);
1352 write_unlock_irqrestore(g_lock, flags);
1354 conn = kiblnd_get_conn_locked(peer);
1355 kiblnd_conn_addref(conn); /* 1 ref for me... */
1357 write_unlock_irqrestore(g_lock, flags);
1360 kiblnd_queue_tx(tx, conn);
1361 kiblnd_conn_decref(conn); /* ...to here */
1366 write_unlock_irqrestore(g_lock, flags);
1368 /* Allocate a peer ready to add to the peer table and retry */
1369 rc = kiblnd_create_peer(ni, &peer, nid);
1371 CERROR("Can't create peer %s\n", libcfs_nid2str(nid));
1373 tx->tx_status = -EHOSTUNREACH;
1375 kiblnd_tx_done(ni, tx);
1380 write_lock_irqsave(g_lock, flags);
1382 peer2 = kiblnd_find_peer_locked(nid);
1383 if (peer2 != NULL) {
1384 if (list_empty(&peer2->ibp_conns)) {
1385 /* found a peer, but it's still connecting... */
1386 LASSERT (peer2->ibp_connecting != 0 ||
1387 peer2->ibp_accepting != 0);
1389 list_add_tail(&tx->tx_list,
1390 &peer2->ibp_tx_queue);
1391 write_unlock_irqrestore(g_lock, flags);
1393 conn = kiblnd_get_conn_locked(peer2);
1394 kiblnd_conn_addref(conn); /* 1 ref for me... */
1396 write_unlock_irqrestore(g_lock, flags);
1399 kiblnd_queue_tx(tx, conn);
1400 kiblnd_conn_decref(conn); /* ...to here */
1403 kiblnd_peer_decref(peer);
1407 /* Brand new peer */
1408 LASSERT (peer->ibp_connecting == 0);
1409 peer->ibp_connecting = 1;
1411 /* always called with a ref on ni, which prevents ni being shutdown */
1412 LASSERT (((kib_net_t *)ni->ni_data)->ibn_shutdown == 0);
1415 list_add_tail(&tx->tx_list, &peer->ibp_tx_queue);
1417 kiblnd_peer_addref(peer);
1418 list_add_tail(&peer->ibp_list, kiblnd_nid2peerlist(nid));
1420 write_unlock_irqrestore(g_lock, flags);
1422 kiblnd_connect_peer(peer);
1423 kiblnd_peer_decref(peer);
1427 kiblnd_send (lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg)
1429 lnet_hdr_t *hdr = &lntmsg->msg_hdr;
1430 int type = lntmsg->msg_type;
1431 lnet_process_id_t target = lntmsg->msg_target;
1432 int target_is_router = lntmsg->msg_target_is_router;
1433 int routing = lntmsg->msg_routing;
1434 unsigned int payload_niov = lntmsg->msg_niov;
1435 struct iovec *payload_iov = lntmsg->msg_iov;
1436 lnet_kiov_t *payload_kiov = lntmsg->msg_kiov;
1437 unsigned int payload_offset = lntmsg->msg_offset;
1438 unsigned int payload_nob = lntmsg->msg_len;
1440 kib_rdma_desc_t *rd;
1445 /* NB 'private' is different depending on what we're sending.... */
1447 CDEBUG(D_NET, "sending %d bytes in %d frags to %s\n",
1448 payload_nob, payload_niov, libcfs_id2str(target));
1450 LASSERT (payload_nob == 0 || payload_niov > 0);
1451 LASSERT (payload_niov <= LNET_MAX_IOV);
1453 /* Thread context */
1454 LASSERT (!in_interrupt());
1455 /* payload is either all vaddrs or all pages */
1456 LASSERT (!(payload_kiov != NULL && payload_iov != NULL));
1464 LASSERT (payload_nob == 0);
1468 if (routing || target_is_router)
1469 break; /* send IMMEDIATE */
1471 /* is the REPLY message too small for RDMA? */
1472 nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[lntmsg->msg_md->md_length]);
1473 if (nob <= IBLND_MSG_SIZE)
1474 break; /* send IMMEDIATE */
1476 tx = kiblnd_get_idle_tx(ni, target.nid);
1478 CERROR("Can't allocate txd for GET to %s\n",
1479 libcfs_nid2str(target.nid));
1484 rd = &ibmsg->ibm_u.get.ibgm_rd;
1485 if ((lntmsg->msg_md->md_options & LNET_MD_KIOV) == 0)
1486 rc = kiblnd_setup_rd_iov(ni, tx, rd,
1487 lntmsg->msg_md->md_niov,
1488 lntmsg->msg_md->md_iov.iov,
1489 0, lntmsg->msg_md->md_length);
1491 rc = kiblnd_setup_rd_kiov(ni, tx, rd,
1492 lntmsg->msg_md->md_niov,
1493 lntmsg->msg_md->md_iov.kiov,
1494 0, lntmsg->msg_md->md_length);
1496 CERROR("Can't setup GET sink for %s: %d\n",
1497 libcfs_nid2str(target.nid), rc);
1498 kiblnd_tx_done(ni, tx);
1502 nob = offsetof(kib_get_msg_t, ibgm_rd.rd_frags[rd->rd_nfrags]);
1503 ibmsg->ibm_u.get.ibgm_cookie = tx->tx_cookie;
1504 ibmsg->ibm_u.get.ibgm_hdr = *hdr;
1506 kiblnd_init_tx_msg(ni, tx, IBLND_MSG_GET_REQ, nob);
1508 tx->tx_lntmsg[1] = lnet_create_reply_msg(ni, lntmsg);
1509 if (tx->tx_lntmsg[1] == NULL) {
1510 CERROR("Can't create reply for GET -> %s\n",
1511 libcfs_nid2str(target.nid));
1512 kiblnd_tx_done(ni, tx);
1516 tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg[0,1] on completion */
1517 tx->tx_waiting = 1; /* waiting for GET_DONE */
1518 kiblnd_launch_tx(ni, tx, target.nid);
1521 case LNET_MSG_REPLY:
1523 /* Is the payload small enough not to need RDMA? */
1524 nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[payload_nob]);
1525 if (nob <= IBLND_MSG_SIZE)
1526 break; /* send IMMEDIATE */
1528 tx = kiblnd_get_idle_tx(ni, target.nid);
1530 CERROR("Can't allocate %s txd for %s\n",
1531 type == LNET_MSG_PUT ? "PUT" : "REPLY",
1532 libcfs_nid2str(target.nid));
1536 if (payload_kiov == NULL)
1537 rc = kiblnd_setup_rd_iov(ni, tx, tx->tx_rd,
1538 payload_niov, payload_iov,
1539 payload_offset, payload_nob);
1541 rc = kiblnd_setup_rd_kiov(ni, tx, tx->tx_rd,
1542 payload_niov, payload_kiov,
1543 payload_offset, payload_nob);
1545 CERROR("Can't setup PUT src for %s: %d\n",
1546 libcfs_nid2str(target.nid), rc);
1547 kiblnd_tx_done(ni, tx);
1552 ibmsg->ibm_u.putreq.ibprm_hdr = *hdr;
1553 ibmsg->ibm_u.putreq.ibprm_cookie = tx->tx_cookie;
1554 kiblnd_init_tx_msg(ni, tx, IBLND_MSG_PUT_REQ, sizeof(kib_putreq_msg_t));
1556 tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */
1557 tx->tx_waiting = 1; /* waiting for PUT_{ACK,NAK} */
1558 kiblnd_launch_tx(ni, tx, target.nid);
1562 /* send IMMEDIATE */
1564 LASSERT (offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[payload_nob])
1567 tx = kiblnd_get_idle_tx(ni, target.nid);
1569 CERROR ("Can't send %d to %s: tx descs exhausted\n",
1570 type, libcfs_nid2str(target.nid));
1575 ibmsg->ibm_u.immediate.ibim_hdr = *hdr;
1577 if (payload_kiov != NULL)
1578 lnet_copy_kiov2flat(IBLND_MSG_SIZE, ibmsg,
1579 offsetof(kib_msg_t, ibm_u.immediate.ibim_payload),
1580 payload_niov, payload_kiov,
1581 payload_offset, payload_nob);
1583 lnet_copy_iov2flat(IBLND_MSG_SIZE, ibmsg,
1584 offsetof(kib_msg_t, ibm_u.immediate.ibim_payload),
1585 payload_niov, payload_iov,
1586 payload_offset, payload_nob);
1588 nob = offsetof(kib_immediate_msg_t, ibim_payload[payload_nob]);
1589 kiblnd_init_tx_msg(ni, tx, IBLND_MSG_IMMEDIATE, nob);
1591 tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */
1592 kiblnd_launch_tx(ni, tx, target.nid);
1597 kiblnd_reply (lnet_ni_t *ni, kib_rx_t *rx, lnet_msg_t *lntmsg)
1599 lnet_process_id_t target = lntmsg->msg_target;
1600 unsigned int niov = lntmsg->msg_niov;
1601 struct iovec *iov = lntmsg->msg_iov;
1602 lnet_kiov_t *kiov = lntmsg->msg_kiov;
1603 unsigned int offset = lntmsg->msg_offset;
1604 unsigned int nob = lntmsg->msg_len;
1608 tx = kiblnd_get_idle_tx(ni, rx->rx_conn->ibc_peer->ibp_nid);
1610 CERROR("Can't get tx for REPLY to %s\n",
1611 libcfs_nid2str(target.nid));
1617 else if (kiov == NULL)
1618 rc = kiblnd_setup_rd_iov(ni, tx, tx->tx_rd,
1619 niov, iov, offset, nob);
1621 rc = kiblnd_setup_rd_kiov(ni, tx, tx->tx_rd,
1622 niov, kiov, offset, nob);
1625 CERROR("Can't setup GET src for %s: %d\n",
1626 libcfs_nid2str(target.nid), rc);
1630 rc = kiblnd_init_rdma(rx->rx_conn, tx,
1631 IBLND_MSG_GET_DONE, nob,
1632 &rx->rx_msg->ibm_u.get.ibgm_rd,
1633 rx->rx_msg->ibm_u.get.ibgm_cookie);
1635 CERROR("Can't setup rdma for GET from %s: %d\n",
1636 libcfs_nid2str(target.nid), rc);
1641 /* No RDMA: local completion may happen now! */
1642 lnet_finalize(ni, lntmsg, 0);
1644 /* RDMA: lnet_finalize(lntmsg) when it
1646 tx->tx_lntmsg[0] = lntmsg;
1649 kiblnd_queue_tx(tx, rx->rx_conn);
1653 kiblnd_tx_done(ni, tx);
1655 lnet_finalize(ni, lntmsg, -EIO);
1659 kiblnd_recv (lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg, int delayed,
1660 unsigned int niov, struct iovec *iov, lnet_kiov_t *kiov,
1661 unsigned int offset, unsigned int mlen, unsigned int rlen)
1663 kib_rx_t *rx = private;
1664 kib_msg_t *rxmsg = rx->rx_msg;
1665 kib_conn_t *conn = rx->rx_conn;
1668 int post_credit = IBLND_POSTRX_PEER_CREDIT;
1671 LASSERT (mlen <= rlen);
1672 LASSERT (!in_interrupt());
1673 /* Either all pages or all vaddrs */
1674 LASSERT (!(kiov != NULL && iov != NULL));
1676 switch (rxmsg->ibm_type) {
1680 case IBLND_MSG_IMMEDIATE:
1681 nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[rlen]);
1682 if (nob > rx->rx_nob) {
1683 CERROR ("Immediate message from %s too big: %d(%d)\n",
1684 libcfs_nid2str(rxmsg->ibm_u.immediate.ibim_hdr.src_nid),
1691 lnet_copy_flat2kiov(niov, kiov, offset,
1692 IBLND_MSG_SIZE, rxmsg,
1693 offsetof(kib_msg_t, ibm_u.immediate.ibim_payload),
1696 lnet_copy_flat2iov(niov, iov, offset,
1697 IBLND_MSG_SIZE, rxmsg,
1698 offsetof(kib_msg_t, ibm_u.immediate.ibim_payload),
1700 lnet_finalize (ni, lntmsg, 0);
1703 case IBLND_MSG_PUT_REQ: {
1705 kib_rdma_desc_t *rd;
1708 lnet_finalize(ni, lntmsg, 0);
1709 kiblnd_send_completion(rx->rx_conn, IBLND_MSG_PUT_NAK, 0,
1710 rxmsg->ibm_u.putreq.ibprm_cookie);
1714 tx = kiblnd_get_idle_tx(ni, conn->ibc_peer->ibp_nid);
1716 CERROR("Can't allocate tx for %s\n",
1717 libcfs_nid2str(conn->ibc_peer->ibp_nid));
1718 /* Not replying will break the connection */
1724 rd = &txmsg->ibm_u.putack.ibpam_rd;
1726 rc = kiblnd_setup_rd_iov(ni, tx, rd,
1727 niov, iov, offset, mlen);
1729 rc = kiblnd_setup_rd_kiov(ni, tx, rd,
1730 niov, kiov, offset, mlen);
1732 CERROR("Can't setup PUT sink for %s: %d\n",
1733 libcfs_nid2str(conn->ibc_peer->ibp_nid), rc);
1734 kiblnd_tx_done(ni, tx);
1735 /* tell peer it's over */
1736 kiblnd_send_completion(rx->rx_conn, IBLND_MSG_PUT_NAK, rc,
1737 rxmsg->ibm_u.putreq.ibprm_cookie);
1741 nob = offsetof(kib_putack_msg_t, ibpam_rd.rd_frags[rd->rd_nfrags]);
1742 txmsg->ibm_u.putack.ibpam_src_cookie = rxmsg->ibm_u.putreq.ibprm_cookie;
1743 txmsg->ibm_u.putack.ibpam_dst_cookie = tx->tx_cookie;
1745 kiblnd_init_tx_msg(ni, tx, IBLND_MSG_PUT_ACK, nob);
1747 tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */
1748 tx->tx_waiting = 1; /* waiting for PUT_DONE */
1749 kiblnd_queue_tx(tx, conn);
1751 /* reposted buffer reserved for PUT_DONE */
1752 post_credit = IBLND_POSTRX_NO_CREDIT;
1756 case IBLND_MSG_GET_REQ:
1757 if (lntmsg != NULL) {
1758 /* Optimized GET; RDMA lntmsg's payload */
1759 kiblnd_reply(ni, rx, lntmsg);
1761 /* GET didn't match anything */
1762 kiblnd_send_completion(rx->rx_conn, IBLND_MSG_GET_DONE,
1764 rxmsg->ibm_u.get.ibgm_cookie);
1769 kiblnd_post_rx(rx, post_credit);
1774 kiblnd_thread_start(int (*fn)(void *arg), void *arg, char *name)
1776 struct task_struct *task = kthread_run(fn, arg, name);
1779 return PTR_ERR(task);
1781 atomic_inc(&kiblnd_data.kib_nthreads);
1786 kiblnd_thread_fini (void)
1788 atomic_dec (&kiblnd_data.kib_nthreads);
1792 kiblnd_peer_alive (kib_peer_t *peer)
1794 /* This is racy, but everyone's only writing cfs_time_current() */
1795 peer->ibp_last_alive = cfs_time_current();
1800 kiblnd_peer_notify (kib_peer_t *peer)
1803 cfs_time_t last_alive = 0;
1804 unsigned long flags;
1806 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1808 if (list_empty(&peer->ibp_conns) &&
1809 peer->ibp_accepting == 0 &&
1810 peer->ibp_connecting == 0 &&
1811 peer->ibp_error != 0) {
1812 error = peer->ibp_error;
1813 peer->ibp_error = 0;
1815 last_alive = peer->ibp_last_alive;
1818 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1821 lnet_notify(peer->ibp_ni,
1822 peer->ibp_nid, 0, last_alive);
1826 kiblnd_close_conn_locked (kib_conn_t *conn, int error)
1828 /* This just does the immediate housekeeping. 'error' is zero for a
1829 * normal shutdown which can happen only after the connection has been
1830 * established. If the connection is established, schedule the
1831 * connection to be finished off by the connd. Otherwise the connd is
1832 * already dealing with it (either to set it up or tear it down).
1833 * Caller holds kib_global_lock exclusively in irq context */
1834 kib_peer_t *peer = conn->ibc_peer;
1836 unsigned long flags;
1838 LASSERT (error != 0 || conn->ibc_state >= IBLND_CONN_ESTABLISHED);
1840 if (error != 0 && conn->ibc_comms_error == 0)
1841 conn->ibc_comms_error = error;
1843 if (conn->ibc_state != IBLND_CONN_ESTABLISHED)
1844 return; /* already being handled */
1847 list_empty(&conn->ibc_tx_noops) &&
1848 list_empty(&conn->ibc_tx_queue) &&
1849 list_empty(&conn->ibc_tx_queue_rsrvd) &&
1850 list_empty(&conn->ibc_tx_queue_nocred) &&
1851 list_empty(&conn->ibc_active_txs)) {
1852 CDEBUG(D_NET, "closing conn to %s\n",
1853 libcfs_nid2str(peer->ibp_nid));
1855 CNETERR("Closing conn to %s: error %d%s%s%s%s%s\n",
1856 libcfs_nid2str(peer->ibp_nid), error,
1857 list_empty(&conn->ibc_tx_queue) ? "" : "(sending)",
1858 list_empty(&conn->ibc_tx_noops) ? "" : "(sending_noops)",
1859 list_empty(&conn->ibc_tx_queue_rsrvd) ?
1860 "" : "(sending_rsrvd)",
1861 list_empty(&conn->ibc_tx_queue_nocred) ?
1862 "" : "(sending_nocred)",
1863 list_empty(&conn->ibc_active_txs) ? "" : "(waiting)");
1866 dev = ((kib_net_t *)peer->ibp_ni->ni_data)->ibn_dev;
1867 list_del(&conn->ibc_list);
1868 /* connd (see below) takes over ibc_list's ref */
1870 if (list_empty(&peer->ibp_conns) && /* no more conns */
1871 kiblnd_peer_active(peer)) { /* still in peer table */
1872 kiblnd_unlink_peer_locked(peer);
1874 /* set/clear error on last conn */
1875 peer->ibp_error = conn->ibc_comms_error;
1878 kiblnd_set_conn_state(conn, IBLND_CONN_CLOSING);
1881 kiblnd_dev_can_failover(dev)) {
1882 list_add_tail(&dev->ibd_fail_list,
1883 &kiblnd_data.kib_failed_devs);
1884 wake_up(&kiblnd_data.kib_failover_waitq);
1887 spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags);
1889 list_add_tail(&conn->ibc_list, &kiblnd_data.kib_connd_conns);
1890 wake_up(&kiblnd_data.kib_connd_waitq);
1892 spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags);
1896 kiblnd_close_conn(kib_conn_t *conn, int error)
1898 unsigned long flags;
1900 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1902 kiblnd_close_conn_locked(conn, error);
1904 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1908 kiblnd_handle_early_rxs(kib_conn_t *conn)
1910 unsigned long flags;
1913 LASSERT(!in_interrupt());
1914 LASSERT(conn->ibc_state >= IBLND_CONN_ESTABLISHED);
1916 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1917 while (!list_empty(&conn->ibc_early_rxs)) {
1918 rx = list_entry(conn->ibc_early_rxs.next,
1920 list_del(&rx->rx_list);
1921 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1923 kiblnd_handle_rx(rx);
1925 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1927 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1931 kiblnd_abort_txs(kib_conn_t *conn, struct list_head *txs)
1933 struct list_head zombies = LIST_HEAD_INIT(zombies);
1934 struct list_head *tmp;
1935 struct list_head *nxt;
1938 spin_lock(&conn->ibc_lock);
1940 list_for_each_safe(tmp, nxt, txs) {
1941 tx = list_entry(tmp, kib_tx_t, tx_list);
1943 if (txs == &conn->ibc_active_txs) {
1944 LASSERT(!tx->tx_queued);
1945 LASSERT(tx->tx_waiting ||
1946 tx->tx_sending != 0);
1948 LASSERT(tx->tx_queued);
1951 tx->tx_status = -ECONNABORTED;
1954 if (tx->tx_sending == 0) {
1956 list_del(&tx->tx_list);
1957 list_add(&tx->tx_list, &zombies);
1961 spin_unlock(&conn->ibc_lock);
1963 kiblnd_txlist_done(conn->ibc_peer->ibp_ni, &zombies, -ECONNABORTED);
1967 kiblnd_finalise_conn (kib_conn_t *conn)
1969 LASSERT (!in_interrupt());
1970 LASSERT (conn->ibc_state > IBLND_CONN_INIT);
1972 kiblnd_set_conn_state(conn, IBLND_CONN_DISCONNECTED);
1974 /* abort_receives moves QP state to IB_QPS_ERR. This is only required
1975 * for connections that didn't get as far as being connected, because
1976 * rdma_disconnect() does this for free. */
1977 kiblnd_abort_receives(conn);
1979 /* Complete all tx descs not waiting for sends to complete.
1980 * NB we should be safe from RDMA now that the QP has changed state */
1982 kiblnd_abort_txs(conn, &conn->ibc_tx_noops);
1983 kiblnd_abort_txs(conn, &conn->ibc_tx_queue);
1984 kiblnd_abort_txs(conn, &conn->ibc_tx_queue_rsrvd);
1985 kiblnd_abort_txs(conn, &conn->ibc_tx_queue_nocred);
1986 kiblnd_abort_txs(conn, &conn->ibc_active_txs);
1988 kiblnd_handle_early_rxs(conn);
1992 kiblnd_peer_connect_failed(kib_peer_t *peer, int active, int error)
1994 struct list_head zombies = LIST_HEAD_INIT(zombies);
1995 unsigned long flags;
1997 LASSERT (error != 0);
1998 LASSERT (!in_interrupt());
2000 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2003 LASSERT (peer->ibp_connecting > 0);
2004 peer->ibp_connecting--;
2006 LASSERT (peer->ibp_accepting > 0);
2007 peer->ibp_accepting--;
2010 if (peer->ibp_connecting != 0 ||
2011 peer->ibp_accepting != 0) {
2012 /* another connection attempt under way... */
2013 write_unlock_irqrestore(&kiblnd_data.kib_global_lock,
2018 if (list_empty(&peer->ibp_conns)) {
2019 /* Take peer's blocked transmits to complete with error */
2020 list_add(&zombies, &peer->ibp_tx_queue);
2021 list_del_init(&peer->ibp_tx_queue);
2023 if (kiblnd_peer_active(peer))
2024 kiblnd_unlink_peer_locked(peer);
2026 peer->ibp_error = error;
2028 /* Can't have blocked transmits if there are connections */
2029 LASSERT(list_empty(&peer->ibp_tx_queue));
2032 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2034 kiblnd_peer_notify(peer);
2036 if (list_empty(&zombies))
2039 CNETERR("Deleting messages for %s: connection failed\n",
2040 libcfs_nid2str(peer->ibp_nid));
2042 kiblnd_txlist_done(peer->ibp_ni, &zombies, -EHOSTUNREACH);
2046 kiblnd_connreq_done(kib_conn_t *conn, int status)
2048 kib_peer_t *peer = conn->ibc_peer;
2050 struct list_head txs;
2051 unsigned long flags;
2054 active = (conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT);
2056 CDEBUG(D_NET,"%s: active(%d), version(%x), status(%d)\n",
2057 libcfs_nid2str(peer->ibp_nid), active,
2058 conn->ibc_version, status);
2060 LASSERT (!in_interrupt());
2061 LASSERT ((conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT &&
2062 peer->ibp_connecting > 0) ||
2063 (conn->ibc_state == IBLND_CONN_PASSIVE_WAIT &&
2064 peer->ibp_accepting > 0));
2066 LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars));
2067 conn->ibc_connvars = NULL;
2070 /* failed to establish connection */
2071 kiblnd_peer_connect_failed(peer, active, status);
2072 kiblnd_finalise_conn(conn);
2076 /* connection established */
2077 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2079 conn->ibc_last_send = jiffies;
2080 kiblnd_set_conn_state(conn, IBLND_CONN_ESTABLISHED);
2081 kiblnd_peer_alive(peer);
2083 /* Add conn to peer's list and nuke any dangling conns from a different
2084 * peer instance... */
2085 kiblnd_conn_addref(conn); /* +1 ref for ibc_list */
2086 list_add(&conn->ibc_list, &peer->ibp_conns);
2088 peer->ibp_connecting--;
2090 peer->ibp_accepting--;
2092 if (peer->ibp_version == 0) {
2093 peer->ibp_version = conn->ibc_version;
2094 peer->ibp_incarnation = conn->ibc_incarnation;
2097 if (peer->ibp_version != conn->ibc_version ||
2098 peer->ibp_incarnation != conn->ibc_incarnation) {
2099 kiblnd_close_stale_conns_locked(peer, conn->ibc_version,
2100 conn->ibc_incarnation);
2101 peer->ibp_version = conn->ibc_version;
2102 peer->ibp_incarnation = conn->ibc_incarnation;
2105 /* grab pending txs while I have the lock */
2106 list_add(&txs, &peer->ibp_tx_queue);
2107 list_del_init(&peer->ibp_tx_queue);
2109 if (!kiblnd_peer_active(peer) || /* peer has been deleted */
2110 conn->ibc_comms_error != 0) { /* error has happened already */
2111 lnet_ni_t *ni = peer->ibp_ni;
2113 /* start to shut down connection */
2114 kiblnd_close_conn_locked(conn, -ECONNABORTED);
2115 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2117 kiblnd_txlist_done(ni, &txs, -ECONNABORTED);
2122 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2124 /* Schedule blocked txs */
2125 spin_lock(&conn->ibc_lock);
2126 while (!list_empty(&txs)) {
2127 tx = list_entry(txs.next, kib_tx_t, tx_list);
2128 list_del(&tx->tx_list);
2130 kiblnd_queue_tx_locked(tx, conn);
2132 spin_unlock(&conn->ibc_lock);
2134 kiblnd_check_sends(conn);
2136 /* schedule blocked rxs */
2137 kiblnd_handle_early_rxs(conn);
2141 kiblnd_reject(struct rdma_cm_id *cmid, kib_rej_t *rej)
2145 rc = rdma_reject(cmid, rej, sizeof(*rej));
2148 CWARN("Error %d sending reject\n", rc);
2152 kiblnd_passive_connect(struct rdma_cm_id *cmid, void *priv, int priv_nob)
2154 rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
2155 kib_msg_t *reqmsg = priv;
2161 lnet_ni_t *ni = NULL;
2162 kib_net_t *net = NULL;
2164 struct rdma_conn_param cp;
2166 int version = IBLND_MSG_VERSION;
2167 unsigned long flags;
2169 struct sockaddr_in *peer_addr;
2170 LASSERT (!in_interrupt());
2172 /* cmid inherits 'context' from the corresponding listener id */
2173 ibdev = (kib_dev_t *)cmid->context;
2174 LASSERT (ibdev != NULL);
2176 memset(&rej, 0, sizeof(rej));
2177 rej.ibr_magic = IBLND_MSG_MAGIC;
2178 rej.ibr_why = IBLND_REJECT_FATAL;
2179 rej.ibr_cp.ibcp_max_msg_size = IBLND_MSG_SIZE;
2181 peer_addr = (struct sockaddr_in *)&(cmid->route.addr.dst_addr);
2182 if (*kiblnd_tunables.kib_require_priv_port &&
2183 ntohs(peer_addr->sin_port) >= PROT_SOCK) {
2184 __u32 ip = ntohl(peer_addr->sin_addr.s_addr);
2185 CERROR("Peer's port (%pI4h:%hu) is not privileged\n",
2186 &ip, ntohs(peer_addr->sin_port));
2190 if (priv_nob < offsetof(kib_msg_t, ibm_type)) {
2191 CERROR("Short connection request\n");
2195 /* Future protocol version compatibility support! If the
2196 * o2iblnd-specific protocol changes, or when LNET unifies
2197 * protocols over all LNDs, the initial connection will
2198 * negotiate a protocol version. I trap this here to avoid
2199 * console errors; the reject tells the peer which protocol I
2201 if (reqmsg->ibm_magic == LNET_PROTO_MAGIC ||
2202 reqmsg->ibm_magic == __swab32(LNET_PROTO_MAGIC))
2204 if (reqmsg->ibm_magic == IBLND_MSG_MAGIC &&
2205 reqmsg->ibm_version != IBLND_MSG_VERSION &&
2206 reqmsg->ibm_version != IBLND_MSG_VERSION_1)
2208 if (reqmsg->ibm_magic == __swab32(IBLND_MSG_MAGIC) &&
2209 reqmsg->ibm_version != __swab16(IBLND_MSG_VERSION) &&
2210 reqmsg->ibm_version != __swab16(IBLND_MSG_VERSION_1))
2213 rc = kiblnd_unpack_msg(reqmsg, priv_nob);
2215 CERROR("Can't parse connection request: %d\n", rc);
2219 nid = reqmsg->ibm_srcnid;
2220 ni = lnet_net2ni(LNET_NIDNET(reqmsg->ibm_dstnid));
2223 net = (kib_net_t *)ni->ni_data;
2224 rej.ibr_incarnation = net->ibn_incarnation;
2227 if (ni == NULL || /* no matching net */
2228 ni->ni_nid != reqmsg->ibm_dstnid || /* right NET, wrong NID! */
2229 net->ibn_dev != ibdev) { /* wrong device */
2230 CERROR("Can't accept %s on %s (%s:%d:%pI4h): "
2231 "bad dst nid %s\n", libcfs_nid2str(nid),
2232 ni == NULL ? "NA" : libcfs_nid2str(ni->ni_nid),
2233 ibdev->ibd_ifname, ibdev->ibd_nnets,
2235 libcfs_nid2str(reqmsg->ibm_dstnid));
2240 /* check time stamp as soon as possible */
2241 if (reqmsg->ibm_dststamp != 0 &&
2242 reqmsg->ibm_dststamp != net->ibn_incarnation) {
2243 CWARN("Stale connection request\n");
2244 rej.ibr_why = IBLND_REJECT_CONN_STALE;
2248 /* I can accept peer's version */
2249 version = reqmsg->ibm_version;
2251 if (reqmsg->ibm_type != IBLND_MSG_CONNREQ) {
2252 CERROR("Unexpected connreq msg type: %x from %s\n",
2253 reqmsg->ibm_type, libcfs_nid2str(nid));
2257 if (reqmsg->ibm_u.connparams.ibcp_queue_depth !=
2258 IBLND_MSG_QUEUE_SIZE(version)) {
2259 CERROR("Can't accept %s: incompatible queue depth %d (%d wanted)\n",
2260 libcfs_nid2str(nid), reqmsg->ibm_u.connparams.ibcp_queue_depth,
2261 IBLND_MSG_QUEUE_SIZE(version));
2263 if (version == IBLND_MSG_VERSION)
2264 rej.ibr_why = IBLND_REJECT_MSG_QUEUE_SIZE;
2269 if (reqmsg->ibm_u.connparams.ibcp_max_frags !=
2270 IBLND_RDMA_FRAGS(version)) {
2271 CERROR("Can't accept %s(version %x): "
2272 "incompatible max_frags %d (%d wanted)\n",
2273 libcfs_nid2str(nid), version,
2274 reqmsg->ibm_u.connparams.ibcp_max_frags,
2275 IBLND_RDMA_FRAGS(version));
2277 if (version == IBLND_MSG_VERSION)
2278 rej.ibr_why = IBLND_REJECT_RDMA_FRAGS;
2284 if (reqmsg->ibm_u.connparams.ibcp_max_msg_size > IBLND_MSG_SIZE) {
2285 CERROR("Can't accept %s: message size %d too big (%d max)\n",
2286 libcfs_nid2str(nid),
2287 reqmsg->ibm_u.connparams.ibcp_max_msg_size,
2292 /* assume 'nid' is a new peer; create */
2293 rc = kiblnd_create_peer(ni, &peer, nid);
2295 CERROR("Can't create peer for %s\n", libcfs_nid2str(nid));
2296 rej.ibr_why = IBLND_REJECT_NO_RESOURCES;
2300 write_lock_irqsave(g_lock, flags);
2302 peer2 = kiblnd_find_peer_locked(nid);
2303 if (peer2 != NULL) {
2304 if (peer2->ibp_version == 0) {
2305 peer2->ibp_version = version;
2306 peer2->ibp_incarnation = reqmsg->ibm_srcstamp;
2309 /* not the guy I've talked with */
2310 if (peer2->ibp_incarnation != reqmsg->ibm_srcstamp ||
2311 peer2->ibp_version != version) {
2312 kiblnd_close_peer_conns_locked(peer2, -ESTALE);
2313 write_unlock_irqrestore(g_lock, flags);
2315 CWARN("Conn stale %s [old ver: %x, new ver: %x]\n",
2316 libcfs_nid2str(nid), peer2->ibp_version, version);
2318 kiblnd_peer_decref(peer);
2319 rej.ibr_why = IBLND_REJECT_CONN_STALE;
2323 /* tie-break connection race in favour of the higher NID */
2324 if (peer2->ibp_connecting != 0 &&
2326 write_unlock_irqrestore(g_lock, flags);
2328 CWARN("Conn race %s\n", libcfs_nid2str(peer2->ibp_nid));
2330 kiblnd_peer_decref(peer);
2331 rej.ibr_why = IBLND_REJECT_CONN_RACE;
2335 peer2->ibp_accepting++;
2336 kiblnd_peer_addref(peer2);
2338 write_unlock_irqrestore(g_lock, flags);
2339 kiblnd_peer_decref(peer);
2342 /* Brand new peer */
2343 LASSERT (peer->ibp_accepting == 0);
2344 LASSERT (peer->ibp_version == 0 &&
2345 peer->ibp_incarnation == 0);
2347 peer->ibp_accepting = 1;
2348 peer->ibp_version = version;
2349 peer->ibp_incarnation = reqmsg->ibm_srcstamp;
2351 /* I have a ref on ni that prevents it being shutdown */
2352 LASSERT (net->ibn_shutdown == 0);
2354 kiblnd_peer_addref(peer);
2355 list_add_tail(&peer->ibp_list, kiblnd_nid2peerlist(nid));
2357 write_unlock_irqrestore(g_lock, flags);
2360 conn = kiblnd_create_conn(peer, cmid, IBLND_CONN_PASSIVE_WAIT, version);
2362 kiblnd_peer_connect_failed(peer, 0, -ENOMEM);
2363 kiblnd_peer_decref(peer);
2364 rej.ibr_why = IBLND_REJECT_NO_RESOURCES;
2368 /* conn now "owns" cmid, so I return success from here on to ensure the
2369 * CM callback doesn't destroy cmid. */
2371 conn->ibc_incarnation = reqmsg->ibm_srcstamp;
2372 conn->ibc_credits = IBLND_MSG_QUEUE_SIZE(version);
2373 conn->ibc_reserved_credits = IBLND_MSG_QUEUE_SIZE(version);
2374 LASSERT (conn->ibc_credits + conn->ibc_reserved_credits + IBLND_OOB_MSGS(version)
2375 <= IBLND_RX_MSGS(version));
2377 ackmsg = &conn->ibc_connvars->cv_msg;
2378 memset(ackmsg, 0, sizeof(*ackmsg));
2380 kiblnd_init_msg(ackmsg, IBLND_MSG_CONNACK,
2381 sizeof(ackmsg->ibm_u.connparams));
2382 ackmsg->ibm_u.connparams.ibcp_queue_depth = IBLND_MSG_QUEUE_SIZE(version);
2383 ackmsg->ibm_u.connparams.ibcp_max_msg_size = IBLND_MSG_SIZE;
2384 ackmsg->ibm_u.connparams.ibcp_max_frags = IBLND_RDMA_FRAGS(version);
2386 kiblnd_pack_msg(ni, ackmsg, version, 0, nid, reqmsg->ibm_srcstamp);
2388 memset(&cp, 0, sizeof(cp));
2389 cp.private_data = ackmsg;
2390 cp.private_data_len = ackmsg->ibm_nob;
2391 cp.responder_resources = 0; /* No atomic ops or RDMA reads */
2392 cp.initiator_depth = 0;
2393 cp.flow_control = 1;
2394 cp.retry_count = *kiblnd_tunables.kib_retry_count;
2395 cp.rnr_retry_count = *kiblnd_tunables.kib_rnr_retry_count;
2397 CDEBUG(D_NET, "Accept %s\n", libcfs_nid2str(nid));
2399 rc = rdma_accept(cmid, &cp);
2401 CERROR("Can't accept %s: %d\n", libcfs_nid2str(nid), rc);
2402 rej.ibr_version = version;
2403 rej.ibr_why = IBLND_REJECT_FATAL;
2405 kiblnd_reject(cmid, &rej);
2406 kiblnd_connreq_done(conn, rc);
2407 kiblnd_conn_decref(conn);
2417 rej.ibr_version = version;
2418 rej.ibr_cp.ibcp_queue_depth = IBLND_MSG_QUEUE_SIZE(version);
2419 rej.ibr_cp.ibcp_max_frags = IBLND_RDMA_FRAGS(version);
2420 kiblnd_reject(cmid, &rej);
2422 return -ECONNREFUSED;
2426 kiblnd_reconnect (kib_conn_t *conn, int version,
2427 __u64 incarnation, int why, kib_connparams_t *cp)
2429 kib_peer_t *peer = conn->ibc_peer;
2432 unsigned long flags;
2434 LASSERT (conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT);
2435 LASSERT (peer->ibp_connecting > 0); /* 'conn' at least */
2437 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2439 /* retry connection if it's still needed and no other connection
2440 * attempts (active or passive) are in progress
2441 * NB: reconnect is still needed even when ibp_tx_queue is
2442 * empty if ibp_version != version because reconnect may be
2443 * initiated by kiblnd_query() */
2444 if ((!list_empty(&peer->ibp_tx_queue) ||
2445 peer->ibp_version != version) &&
2446 peer->ibp_connecting == 1 &&
2447 peer->ibp_accepting == 0) {
2448 if (why == IBLND_REJECT_CONN_RACE) {
2449 /* don't reconnect immediately, intensive reconnecting
2450 * may consume a lot of memory. kiblnd_destroy_conn
2451 * will reconnect after releasing all resources of
2452 * this connection */
2453 conn->ibc_conn_race = 1;
2457 peer->ibp_connecting++;
2459 peer->ibp_version = version;
2460 peer->ibp_incarnation = incarnation;
2463 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2473 case IBLND_REJECT_CONN_STALE:
2477 case IBLND_REJECT_CONN_UNCOMPAT:
2478 reason = "version negotiation";
2482 CNETERR("%s: retrying (%s), %x, %x, "
2483 "queue_dep: %d, max_frag: %d, msg_size: %d\n",
2484 libcfs_nid2str(peer->ibp_nid),
2485 reason, IBLND_MSG_VERSION, version,
2486 cp != NULL? cp->ibcp_queue_depth :IBLND_MSG_QUEUE_SIZE(version),
2487 cp != NULL? cp->ibcp_max_frags : IBLND_RDMA_FRAGS(version),
2488 cp != NULL? cp->ibcp_max_msg_size: IBLND_MSG_SIZE);
2490 kiblnd_connect_peer(peer);
2494 kiblnd_rejected (kib_conn_t *conn, int reason, void *priv, int priv_nob)
2496 kib_peer_t *peer = conn->ibc_peer;
2498 LASSERT (!in_interrupt());
2499 LASSERT (conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT);
2502 case IB_CM_REJ_STALE_CONN:
2503 kiblnd_reconnect(conn, IBLND_MSG_VERSION, 0,
2504 IBLND_REJECT_CONN_STALE, NULL);
2507 case IB_CM_REJ_INVALID_SERVICE_ID:
2508 CNETERR("%s rejected: no listener at %d\n",
2509 libcfs_nid2str(peer->ibp_nid),
2510 *kiblnd_tunables.kib_service);
2513 case IB_CM_REJ_CONSUMER_DEFINED:
2514 if (priv_nob >= offsetof(kib_rej_t, ibr_padding)) {
2515 kib_rej_t *rej = priv;
2516 kib_connparams_t *cp = NULL;
2518 __u64 incarnation = -1;
2520 /* NB. default incarnation is -1 because:
2521 * a) V1 will ignore dst incarnation in connreq.
2522 * b) V2 will provide incarnation while rejecting me,
2523 * -1 will be overwrote.
2525 * if I try to connect to a V1 peer with V2 protocol,
2526 * it rejected me then upgrade to V2, I have no idea
2527 * about the upgrading and try to reconnect with V1,
2528 * in this case upgraded V2 can find out I'm trying to
2529 * talk to the old guy and reject me(incarnation is -1).
2532 if (rej->ibr_magic == __swab32(IBLND_MSG_MAGIC) ||
2533 rej->ibr_magic == __swab32(LNET_PROTO_MAGIC)) {
2534 __swab32s(&rej->ibr_magic);
2535 __swab16s(&rej->ibr_version);
2539 if (priv_nob >= sizeof(kib_rej_t) &&
2540 rej->ibr_version > IBLND_MSG_VERSION_1) {
2541 /* priv_nob is always 148 in current version
2542 * of OFED, so we still need to check version.
2543 * (define of IB_CM_REJ_PRIVATE_DATA_SIZE) */
2547 __swab64s(&rej->ibr_incarnation);
2548 __swab16s(&cp->ibcp_queue_depth);
2549 __swab16s(&cp->ibcp_max_frags);
2550 __swab32s(&cp->ibcp_max_msg_size);
2553 incarnation = rej->ibr_incarnation;
2556 if (rej->ibr_magic != IBLND_MSG_MAGIC &&
2557 rej->ibr_magic != LNET_PROTO_MAGIC) {
2558 CERROR("%s rejected: consumer defined fatal error\n",
2559 libcfs_nid2str(peer->ibp_nid));
2563 if (rej->ibr_version != IBLND_MSG_VERSION &&
2564 rej->ibr_version != IBLND_MSG_VERSION_1) {
2565 CERROR("%s rejected: o2iblnd version %x error\n",
2566 libcfs_nid2str(peer->ibp_nid),
2571 if (rej->ibr_why == IBLND_REJECT_FATAL &&
2572 rej->ibr_version == IBLND_MSG_VERSION_1) {
2573 CDEBUG(D_NET, "rejected by old version peer %s: %x\n",
2574 libcfs_nid2str(peer->ibp_nid), rej->ibr_version);
2576 if (conn->ibc_version != IBLND_MSG_VERSION_1)
2577 rej->ibr_why = IBLND_REJECT_CONN_UNCOMPAT;
2580 switch (rej->ibr_why) {
2581 case IBLND_REJECT_CONN_RACE:
2582 case IBLND_REJECT_CONN_STALE:
2583 case IBLND_REJECT_CONN_UNCOMPAT:
2584 kiblnd_reconnect(conn, rej->ibr_version,
2585 incarnation, rej->ibr_why, cp);
2588 case IBLND_REJECT_MSG_QUEUE_SIZE:
2589 CERROR("%s rejected: incompatible message queue depth %d, %d\n",
2590 libcfs_nid2str(peer->ibp_nid),
2591 cp != NULL ? cp->ibcp_queue_depth :
2592 IBLND_MSG_QUEUE_SIZE(rej->ibr_version),
2593 IBLND_MSG_QUEUE_SIZE(conn->ibc_version));
2596 case IBLND_REJECT_RDMA_FRAGS:
2597 CERROR("%s rejected: incompatible # of RDMA fragments %d, %d\n",
2598 libcfs_nid2str(peer->ibp_nid),
2599 cp != NULL ? cp->ibcp_max_frags :
2600 IBLND_RDMA_FRAGS(rej->ibr_version),
2601 IBLND_RDMA_FRAGS(conn->ibc_version));
2604 case IBLND_REJECT_NO_RESOURCES:
2605 CERROR("%s rejected: o2iblnd no resources\n",
2606 libcfs_nid2str(peer->ibp_nid));
2609 case IBLND_REJECT_FATAL:
2610 CERROR("%s rejected: o2iblnd fatal error\n",
2611 libcfs_nid2str(peer->ibp_nid));
2615 CERROR("%s rejected: o2iblnd reason %d\n",
2616 libcfs_nid2str(peer->ibp_nid),
2624 CNETERR("%s rejected: reason %d, size %d\n",
2625 libcfs_nid2str(peer->ibp_nid), reason, priv_nob);
2629 kiblnd_connreq_done(conn, -ECONNREFUSED);
2633 kiblnd_check_connreply (kib_conn_t *conn, void *priv, int priv_nob)
2635 kib_peer_t *peer = conn->ibc_peer;
2636 lnet_ni_t *ni = peer->ibp_ni;
2637 kib_net_t *net = ni->ni_data;
2638 kib_msg_t *msg = priv;
2639 int ver = conn->ibc_version;
2640 int rc = kiblnd_unpack_msg(msg, priv_nob);
2641 unsigned long flags;
2643 LASSERT (net != NULL);
2646 CERROR("Can't unpack connack from %s: %d\n",
2647 libcfs_nid2str(peer->ibp_nid), rc);
2651 if (msg->ibm_type != IBLND_MSG_CONNACK) {
2652 CERROR("Unexpected message %d from %s\n",
2653 msg->ibm_type, libcfs_nid2str(peer->ibp_nid));
2658 if (ver != msg->ibm_version) {
2659 CERROR("%s replied version %x is different with "
2660 "requested version %x\n",
2661 libcfs_nid2str(peer->ibp_nid), msg->ibm_version, ver);
2666 if (msg->ibm_u.connparams.ibcp_queue_depth !=
2667 IBLND_MSG_QUEUE_SIZE(ver)) {
2668 CERROR("%s has incompatible queue depth %d(%d wanted)\n",
2669 libcfs_nid2str(peer->ibp_nid),
2670 msg->ibm_u.connparams.ibcp_queue_depth,
2671 IBLND_MSG_QUEUE_SIZE(ver));
2676 if (msg->ibm_u.connparams.ibcp_max_frags !=
2677 IBLND_RDMA_FRAGS(ver)) {
2678 CERROR("%s has incompatible max_frags %d (%d wanted)\n",
2679 libcfs_nid2str(peer->ibp_nid),
2680 msg->ibm_u.connparams.ibcp_max_frags,
2681 IBLND_RDMA_FRAGS(ver));
2686 if (msg->ibm_u.connparams.ibcp_max_msg_size > IBLND_MSG_SIZE) {
2687 CERROR("%s max message size %d too big (%d max)\n",
2688 libcfs_nid2str(peer->ibp_nid),
2689 msg->ibm_u.connparams.ibcp_max_msg_size,
2695 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2696 if (msg->ibm_dstnid == ni->ni_nid &&
2697 msg->ibm_dststamp == net->ibn_incarnation)
2701 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2704 CERROR("Bad connection reply from %s, rc = %d, "
2705 "version: %x max_frags: %d\n",
2706 libcfs_nid2str(peer->ibp_nid), rc,
2707 msg->ibm_version, msg->ibm_u.connparams.ibcp_max_frags);
2711 conn->ibc_incarnation = msg->ibm_srcstamp;
2713 conn->ibc_reserved_credits = IBLND_MSG_QUEUE_SIZE(ver);
2714 LASSERT (conn->ibc_credits + conn->ibc_reserved_credits + IBLND_OOB_MSGS(ver)
2715 <= IBLND_RX_MSGS(ver));
2717 kiblnd_connreq_done(conn, 0);
2721 /* NB My QP has already established itself, so I handle anything going
2722 * wrong here by setting ibc_comms_error.
2723 * kiblnd_connreq_done(0) moves the conn state to ESTABLISHED, but then
2724 * immediately tears it down. */
2727 conn->ibc_comms_error = rc;
2728 kiblnd_connreq_done(conn, 0);
2732 kiblnd_active_connect (struct rdma_cm_id *cmid)
2734 kib_peer_t *peer = (kib_peer_t *)cmid->context;
2737 struct rdma_conn_param cp;
2740 unsigned long flags;
2743 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2745 incarnation = peer->ibp_incarnation;
2746 version = (peer->ibp_version == 0) ? IBLND_MSG_VERSION :
2749 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2751 conn = kiblnd_create_conn(peer, cmid, IBLND_CONN_ACTIVE_CONNECT, version);
2753 kiblnd_peer_connect_failed(peer, 1, -ENOMEM);
2754 kiblnd_peer_decref(peer); /* lose cmid's ref */
2758 /* conn "owns" cmid now, so I return success from here on to ensure the
2759 * CM callback doesn't destroy cmid. conn also takes over cmid's ref
2762 msg = &conn->ibc_connvars->cv_msg;
2764 memset(msg, 0, sizeof(*msg));
2765 kiblnd_init_msg(msg, IBLND_MSG_CONNREQ, sizeof(msg->ibm_u.connparams));
2766 msg->ibm_u.connparams.ibcp_queue_depth = IBLND_MSG_QUEUE_SIZE(version);
2767 msg->ibm_u.connparams.ibcp_max_frags = IBLND_RDMA_FRAGS(version);
2768 msg->ibm_u.connparams.ibcp_max_msg_size = IBLND_MSG_SIZE;
2770 kiblnd_pack_msg(peer->ibp_ni, msg, version,
2771 0, peer->ibp_nid, incarnation);
2773 memset(&cp, 0, sizeof(cp));
2774 cp.private_data = msg;
2775 cp.private_data_len = msg->ibm_nob;
2776 cp.responder_resources = 0; /* No atomic ops or RDMA reads */
2777 cp.initiator_depth = 0;
2778 cp.flow_control = 1;
2779 cp.retry_count = *kiblnd_tunables.kib_retry_count;
2780 cp.rnr_retry_count = *kiblnd_tunables.kib_rnr_retry_count;
2782 LASSERT(cmid->context == (void *)conn);
2783 LASSERT(conn->ibc_cmid == cmid);
2785 rc = rdma_connect(cmid, &cp);
2787 CERROR("Can't connect to %s: %d\n",
2788 libcfs_nid2str(peer->ibp_nid), rc);
2789 kiblnd_connreq_done(conn, rc);
2790 kiblnd_conn_decref(conn);
2797 kiblnd_cm_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event)
2803 switch (event->event) {
2805 CERROR("Unexpected event: %d, status: %d\n",
2806 event->event, event->status);
2809 case RDMA_CM_EVENT_CONNECT_REQUEST:
2810 /* destroy cmid on failure */
2811 rc = kiblnd_passive_connect(cmid,
2812 (void *)KIBLND_CONN_PARAM(event),
2813 KIBLND_CONN_PARAM_LEN(event));
2814 CDEBUG(D_NET, "connreq: %d\n", rc);
2817 case RDMA_CM_EVENT_ADDR_ERROR:
2818 peer = (kib_peer_t *)cmid->context;
2819 CNETERR("%s: ADDR ERROR %d\n",
2820 libcfs_nid2str(peer->ibp_nid), event->status);
2821 kiblnd_peer_connect_failed(peer, 1, -EHOSTUNREACH);
2822 kiblnd_peer_decref(peer);
2823 return -EHOSTUNREACH; /* rc != 0 destroys cmid */
2825 case RDMA_CM_EVENT_ADDR_RESOLVED:
2826 peer = (kib_peer_t *)cmid->context;
2828 CDEBUG(D_NET,"%s Addr resolved: %d\n",
2829 libcfs_nid2str(peer->ibp_nid), event->status);
2831 if (event->status != 0) {
2832 CNETERR("Can't resolve address for %s: %d\n",
2833 libcfs_nid2str(peer->ibp_nid), event->status);
2836 rc = rdma_resolve_route(
2837 cmid, *kiblnd_tunables.kib_timeout * 1000);
2840 /* Can't initiate route resolution */
2841 CERROR("Can't resolve route for %s: %d\n",
2842 libcfs_nid2str(peer->ibp_nid), rc);
2844 kiblnd_peer_connect_failed(peer, 1, rc);
2845 kiblnd_peer_decref(peer);
2846 return rc; /* rc != 0 destroys cmid */
2848 case RDMA_CM_EVENT_ROUTE_ERROR:
2849 peer = (kib_peer_t *)cmid->context;
2850 CNETERR("%s: ROUTE ERROR %d\n",
2851 libcfs_nid2str(peer->ibp_nid), event->status);
2852 kiblnd_peer_connect_failed(peer, 1, -EHOSTUNREACH);
2853 kiblnd_peer_decref(peer);
2854 return -EHOSTUNREACH; /* rc != 0 destroys cmid */
2856 case RDMA_CM_EVENT_ROUTE_RESOLVED:
2857 peer = (kib_peer_t *)cmid->context;
2858 CDEBUG(D_NET,"%s Route resolved: %d\n",
2859 libcfs_nid2str(peer->ibp_nid), event->status);
2861 if (event->status == 0)
2862 return kiblnd_active_connect(cmid);
2864 CNETERR("Can't resolve route for %s: %d\n",
2865 libcfs_nid2str(peer->ibp_nid), event->status);
2866 kiblnd_peer_connect_failed(peer, 1, event->status);
2867 kiblnd_peer_decref(peer);
2868 return event->status; /* rc != 0 destroys cmid */
2870 case RDMA_CM_EVENT_UNREACHABLE:
2871 conn = (kib_conn_t *)cmid->context;
2872 LASSERT(conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT ||
2873 conn->ibc_state == IBLND_CONN_PASSIVE_WAIT);
2874 CNETERR("%s: UNREACHABLE %d\n",
2875 libcfs_nid2str(conn->ibc_peer->ibp_nid), event->status);
2876 kiblnd_connreq_done(conn, -ENETDOWN);
2877 kiblnd_conn_decref(conn);
2880 case RDMA_CM_EVENT_CONNECT_ERROR:
2881 conn = (kib_conn_t *)cmid->context;
2882 LASSERT(conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT ||
2883 conn->ibc_state == IBLND_CONN_PASSIVE_WAIT);
2884 CNETERR("%s: CONNECT ERROR %d\n",
2885 libcfs_nid2str(conn->ibc_peer->ibp_nid), event->status);
2886 kiblnd_connreq_done(conn, -ENOTCONN);
2887 kiblnd_conn_decref(conn);
2890 case RDMA_CM_EVENT_REJECTED:
2891 conn = (kib_conn_t *)cmid->context;
2892 switch (conn->ibc_state) {
2896 case IBLND_CONN_PASSIVE_WAIT:
2897 CERROR ("%s: REJECTED %d\n",
2898 libcfs_nid2str(conn->ibc_peer->ibp_nid),
2900 kiblnd_connreq_done(conn, -ECONNRESET);
2903 case IBLND_CONN_ACTIVE_CONNECT:
2904 kiblnd_rejected(conn, event->status,
2905 (void *)KIBLND_CONN_PARAM(event),
2906 KIBLND_CONN_PARAM_LEN(event));
2909 kiblnd_conn_decref(conn);
2912 case RDMA_CM_EVENT_ESTABLISHED:
2913 conn = (kib_conn_t *)cmid->context;
2914 switch (conn->ibc_state) {
2918 case IBLND_CONN_PASSIVE_WAIT:
2919 CDEBUG(D_NET, "ESTABLISHED (passive): %s\n",
2920 libcfs_nid2str(conn->ibc_peer->ibp_nid));
2921 kiblnd_connreq_done(conn, 0);
2924 case IBLND_CONN_ACTIVE_CONNECT:
2925 CDEBUG(D_NET, "ESTABLISHED(active): %s\n",
2926 libcfs_nid2str(conn->ibc_peer->ibp_nid));
2927 kiblnd_check_connreply(conn,
2928 (void *)KIBLND_CONN_PARAM(event),
2929 KIBLND_CONN_PARAM_LEN(event));
2932 /* net keeps its ref on conn! */
2935 case RDMA_CM_EVENT_TIMEWAIT_EXIT:
2936 CDEBUG(D_NET, "Ignore TIMEWAIT_EXIT event\n");
2939 case RDMA_CM_EVENT_DISCONNECTED:
2940 conn = (kib_conn_t *)cmid->context;
2941 if (conn->ibc_state < IBLND_CONN_ESTABLISHED) {
2942 CERROR("%s DISCONNECTED\n",
2943 libcfs_nid2str(conn->ibc_peer->ibp_nid));
2944 kiblnd_connreq_done(conn, -ECONNRESET);
2946 kiblnd_close_conn(conn, 0);
2948 kiblnd_conn_decref(conn);
2949 cmid->context = NULL;
2952 case RDMA_CM_EVENT_DEVICE_REMOVAL:
2953 LCONSOLE_ERROR_MSG(0x131,
2954 "Received notification of device removal\n"
2955 "Please shutdown LNET to allow this to proceed\n");
2956 /* Can't remove network from underneath LNET for now, so I have
2960 case RDMA_CM_EVENT_ADDR_CHANGE:
2961 LCONSOLE_INFO("Physical link changed (eg hca/port)\n");
2967 kiblnd_check_txs_locked(kib_conn_t *conn, struct list_head *txs)
2970 struct list_head *ttmp;
2972 list_for_each(ttmp, txs) {
2973 tx = list_entry(ttmp, kib_tx_t, tx_list);
2975 if (txs != &conn->ibc_active_txs) {
2976 LASSERT(tx->tx_queued);
2978 LASSERT(!tx->tx_queued);
2979 LASSERT(tx->tx_waiting || tx->tx_sending != 0);
2982 if (cfs_time_aftereq(jiffies, tx->tx_deadline)) {
2983 CERROR("Timed out tx: %s, %lu seconds\n",
2984 kiblnd_queue2str(conn, txs),
2985 cfs_duration_sec(jiffies - tx->tx_deadline));
2994 kiblnd_conn_timed_out_locked(kib_conn_t *conn)
2996 return kiblnd_check_txs_locked(conn, &conn->ibc_tx_queue) ||
2997 kiblnd_check_txs_locked(conn, &conn->ibc_tx_noops) ||
2998 kiblnd_check_txs_locked(conn, &conn->ibc_tx_queue_rsrvd) ||
2999 kiblnd_check_txs_locked(conn, &conn->ibc_tx_queue_nocred) ||
3000 kiblnd_check_txs_locked(conn, &conn->ibc_active_txs);
3004 kiblnd_check_conns (int idx)
3006 struct list_head closes = LIST_HEAD_INIT(closes);
3007 struct list_head checksends = LIST_HEAD_INIT(checksends);
3008 struct list_head *peers = &kiblnd_data.kib_peers[idx];
3009 struct list_head *ptmp;
3012 struct list_head *ctmp;
3013 unsigned long flags;
3015 /* NB. We expect to have a look at all the peers and not find any
3016 * RDMAs to time out, so we just use a shared lock while we
3018 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
3020 list_for_each(ptmp, peers) {
3021 peer = list_entry(ptmp, kib_peer_t, ibp_list);
3023 list_for_each(ctmp, &peer->ibp_conns) {
3027 conn = list_entry(ctmp, kib_conn_t, ibc_list);
3029 LASSERT(conn->ibc_state == IBLND_CONN_ESTABLISHED);
3031 spin_lock(&conn->ibc_lock);
3033 sendnoop = kiblnd_need_noop(conn);
3034 timedout = kiblnd_conn_timed_out_locked(conn);
3035 if (!sendnoop && !timedout) {
3036 spin_unlock(&conn->ibc_lock);
3041 CERROR("Timed out RDMA with %s (%lu): "
3042 "c: %u, oc: %u, rc: %u\n",
3043 libcfs_nid2str(peer->ibp_nid),
3044 cfs_duration_sec(cfs_time_current() -
3045 peer->ibp_last_alive),
3047 conn->ibc_outstanding_credits,
3048 conn->ibc_reserved_credits);
3049 list_add(&conn->ibc_connd_list, &closes);
3051 list_add(&conn->ibc_connd_list, &checksends);
3053 /* +ref for 'closes' or 'checksends' */
3054 kiblnd_conn_addref(conn);
3056 spin_unlock(&conn->ibc_lock);
3060 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
3062 /* Handle timeout by closing the whole
3063 * connection. We can only be sure RDMA activity
3064 * has ceased once the QP has been modified. */
3065 while (!list_empty(&closes)) {
3066 conn = list_entry(closes.next,
3067 kib_conn_t, ibc_connd_list);
3068 list_del(&conn->ibc_connd_list);
3069 kiblnd_close_conn(conn, -ETIMEDOUT);
3070 kiblnd_conn_decref(conn);
3073 /* In case we have enough credits to return via a
3074 * NOOP, but there were no non-blocking tx descs
3075 * free to do it last time... */
3076 while (!list_empty(&checksends)) {
3077 conn = list_entry(checksends.next,
3078 kib_conn_t, ibc_connd_list);
3079 list_del(&conn->ibc_connd_list);
3080 kiblnd_check_sends(conn);
3081 kiblnd_conn_decref(conn);
3086 kiblnd_disconnect_conn (kib_conn_t *conn)
3088 LASSERT (!in_interrupt());
3089 LASSERT (current == kiblnd_data.kib_connd);
3090 LASSERT (conn->ibc_state == IBLND_CONN_CLOSING);
3092 rdma_disconnect(conn->ibc_cmid);
3093 kiblnd_finalise_conn(conn);
3095 kiblnd_peer_notify(conn->ibc_peer);
3099 kiblnd_connd (void *arg)
3102 unsigned long flags;
3108 unsigned long deadline = jiffies;
3110 cfs_block_allsigs();
3112 init_waitqueue_entry(&wait, current);
3113 kiblnd_data.kib_connd = current;
3115 spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags);
3117 while (!kiblnd_data.kib_shutdown) {
3121 if (!list_empty(&kiblnd_data.kib_connd_zombies)) {
3122 conn = list_entry(kiblnd_data. \
3123 kib_connd_zombies.next,
3124 kib_conn_t, ibc_list);
3125 list_del(&conn->ibc_list);
3127 spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock,
3131 kiblnd_destroy_conn(conn);
3133 spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags);
3136 if (!list_empty(&kiblnd_data.kib_connd_conns)) {
3137 conn = list_entry(kiblnd_data.kib_connd_conns.next,
3138 kib_conn_t, ibc_list);
3139 list_del(&conn->ibc_list);
3141 spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock,
3145 kiblnd_disconnect_conn(conn);
3146 kiblnd_conn_decref(conn);
3148 spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags);
3151 /* careful with the jiffy wrap... */
3152 timeout = (int)(deadline - jiffies);
3156 int chunk = kiblnd_data.kib_peer_hash_size;
3158 spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags);
3161 /* Time to check for RDMA timeouts on a few more
3162 * peers: I do checks every 'p' seconds on a
3163 * proportion of the peer table and I need to check
3164 * every connection 'n' times within a timeout
3165 * interval, to ensure I detect a timeout on any
3166 * connection within (n+1)/n times the timeout
3169 if (*kiblnd_tunables.kib_timeout > n * p)
3170 chunk = (chunk * n * p) /
3171 *kiblnd_tunables.kib_timeout;
3175 for (i = 0; i < chunk; i++) {
3176 kiblnd_check_conns(peer_index);
3177 peer_index = (peer_index + 1) %
3178 kiblnd_data.kib_peer_hash_size;
3181 deadline += msecs_to_jiffies(p * MSEC_PER_SEC);
3182 spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags);
3188 /* Nothing to do for 'timeout' */
3189 set_current_state(TASK_INTERRUPTIBLE);
3190 add_wait_queue(&kiblnd_data.kib_connd_waitq, &wait);
3191 spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags);
3193 schedule_timeout(timeout);
3195 set_current_state(TASK_RUNNING);
3196 remove_wait_queue(&kiblnd_data.kib_connd_waitq, &wait);
3197 spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags);
3200 spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags);
3202 kiblnd_thread_fini();
3207 kiblnd_qp_event(struct ib_event *event, void *arg)
3209 kib_conn_t *conn = arg;
3211 switch (event->event) {
3212 case IB_EVENT_COMM_EST:
3213 CDEBUG(D_NET, "%s established\n",
3214 libcfs_nid2str(conn->ibc_peer->ibp_nid));
3218 CERROR("%s: Async QP event type %d\n",
3219 libcfs_nid2str(conn->ibc_peer->ibp_nid), event->event);
3225 kiblnd_complete (struct ib_wc *wc)
3227 switch (kiblnd_wreqid2type(wc->wr_id)) {
3231 case IBLND_WID_RDMA:
3232 /* We only get RDMA completion notification if it fails. All
3233 * subsequent work items, including the final SEND will fail
3234 * too. However we can't print out any more info about the
3235 * failing RDMA because 'tx' might be back on the idle list or
3236 * even reused already if we didn't manage to post all our work
3238 CNETERR("RDMA (tx: %p) failed: %d\n",
3239 kiblnd_wreqid2ptr(wc->wr_id), wc->status);
3243 kiblnd_tx_complete(kiblnd_wreqid2ptr(wc->wr_id), wc->status);
3247 kiblnd_rx_complete(kiblnd_wreqid2ptr(wc->wr_id), wc->status,
3254 kiblnd_cq_completion(struct ib_cq *cq, void *arg)
3256 /* NB I'm not allowed to schedule this conn once its refcount has
3257 * reached 0. Since fundamentally I'm racing with scheduler threads
3258 * consuming my CQ I could be called after all completions have
3259 * occurred. But in this case, ibc_nrx == 0 && ibc_nsends_posted == 0
3260 * and this CQ is about to be destroyed so I NOOP. */
3261 kib_conn_t *conn = (kib_conn_t *)arg;
3262 struct kib_sched_info *sched = conn->ibc_sched;
3263 unsigned long flags;
3265 LASSERT(cq == conn->ibc_cq);
3267 spin_lock_irqsave(&sched->ibs_lock, flags);
3269 conn->ibc_ready = 1;
3271 if (!conn->ibc_scheduled &&
3272 (conn->ibc_nrx > 0 ||
3273 conn->ibc_nsends_posted > 0)) {
3274 kiblnd_conn_addref(conn); /* +1 ref for sched_conns */
3275 conn->ibc_scheduled = 1;
3276 list_add_tail(&conn->ibc_sched_list, &sched->ibs_conns);
3278 if (waitqueue_active(&sched->ibs_waitq))
3279 wake_up(&sched->ibs_waitq);
3282 spin_unlock_irqrestore(&sched->ibs_lock, flags);
3286 kiblnd_cq_event(struct ib_event *event, void *arg)
3288 kib_conn_t *conn = arg;
3290 CERROR("%s: async CQ event type %d\n",
3291 libcfs_nid2str(conn->ibc_peer->ibp_nid), event->event);
3295 kiblnd_scheduler(void *arg)
3297 long id = (long)arg;
3298 struct kib_sched_info *sched;
3301 unsigned long flags;
3307 cfs_block_allsigs();
3309 init_waitqueue_entry(&wait, current);
3311 sched = kiblnd_data.kib_scheds[KIB_THREAD_CPT(id)];
3313 rc = cfs_cpt_bind(lnet_cpt_table(), sched->ibs_cpt);
3315 CWARN("Failed to bind on CPT %d, please verify whether "
3316 "all CPUs are healthy and reload modules if necessary, "
3317 "otherwise your system might under risk of low "
3318 "performance\n", sched->ibs_cpt);
3321 spin_lock_irqsave(&sched->ibs_lock, flags);
3323 while (!kiblnd_data.kib_shutdown) {
3324 if (busy_loops++ >= IBLND_RESCHED) {
3325 spin_unlock_irqrestore(&sched->ibs_lock, flags);
3330 spin_lock_irqsave(&sched->ibs_lock, flags);
3335 if (!list_empty(&sched->ibs_conns)) {
3336 conn = list_entry(sched->ibs_conns.next,
3337 kib_conn_t, ibc_sched_list);
3338 /* take over kib_sched_conns' ref on conn... */
3339 LASSERT(conn->ibc_scheduled);
3340 list_del(&conn->ibc_sched_list);
3341 conn->ibc_ready = 0;
3343 spin_unlock_irqrestore(&sched->ibs_lock, flags);
3345 rc = ib_poll_cq(conn->ibc_cq, 1, &wc);
3347 rc = ib_req_notify_cq(conn->ibc_cq,
3350 CWARN("%s: ib_req_notify_cq failed: %d, "
3351 "closing connection\n",
3352 libcfs_nid2str(conn->ibc_peer->ibp_nid), rc);
3353 kiblnd_close_conn(conn, -EIO);
3354 kiblnd_conn_decref(conn);
3355 spin_lock_irqsave(&sched->ibs_lock,
3360 rc = ib_poll_cq(conn->ibc_cq, 1, &wc);
3364 CWARN("%s: ib_poll_cq failed: %d, "
3365 "closing connection\n",
3366 libcfs_nid2str(conn->ibc_peer->ibp_nid),
3368 kiblnd_close_conn(conn, -EIO);
3369 kiblnd_conn_decref(conn);
3370 spin_lock_irqsave(&sched->ibs_lock, flags);
3374 spin_lock_irqsave(&sched->ibs_lock, flags);
3376 if (rc != 0 || conn->ibc_ready) {
3377 /* There may be another completion waiting; get
3378 * another scheduler to check while I handle
3380 /* +1 ref for sched_conns */
3381 kiblnd_conn_addref(conn);
3382 list_add_tail(&conn->ibc_sched_list,
3384 if (waitqueue_active(&sched->ibs_waitq))
3385 wake_up(&sched->ibs_waitq);
3387 conn->ibc_scheduled = 0;
3391 spin_unlock_irqrestore(&sched->ibs_lock, flags);
3392 kiblnd_complete(&wc);
3394 spin_lock_irqsave(&sched->ibs_lock, flags);
3397 kiblnd_conn_decref(conn); /* ...drop my ref from above */
3404 set_current_state(TASK_INTERRUPTIBLE);
3405 add_wait_queue_exclusive(&sched->ibs_waitq, &wait);
3406 spin_unlock_irqrestore(&sched->ibs_lock, flags);
3411 remove_wait_queue(&sched->ibs_waitq, &wait);
3412 set_current_state(TASK_RUNNING);
3413 spin_lock_irqsave(&sched->ibs_lock, flags);
3416 spin_unlock_irqrestore(&sched->ibs_lock, flags);
3418 kiblnd_thread_fini();
3423 kiblnd_failover_thread(void *arg)
3425 rwlock_t *glock = &kiblnd_data.kib_global_lock;
3428 unsigned long flags;
3431 LASSERT(*kiblnd_tunables.kib_dev_failover != 0);
3433 cfs_block_allsigs();
3435 init_waitqueue_entry(&wait, current);
3436 write_lock_irqsave(glock, flags);
3438 while (!kiblnd_data.kib_shutdown) {
3439 int do_failover = 0;
3442 list_for_each_entry(dev, &kiblnd_data.kib_failed_devs,
3444 if (cfs_time_before(cfs_time_current(),
3445 dev->ibd_next_failover))
3452 list_del_init(&dev->ibd_fail_list);
3453 dev->ibd_failover = 1;
3454 write_unlock_irqrestore(glock, flags);
3456 rc = kiblnd_dev_failover(dev);
3458 write_lock_irqsave(glock, flags);
3460 LASSERT (dev->ibd_failover);
3461 dev->ibd_failover = 0;
3462 if (rc >= 0) { /* Device is OK or failover succeed */
3463 dev->ibd_next_failover = cfs_time_shift(3);
3467 /* failed to failover, retry later */
3468 dev->ibd_next_failover =
3469 cfs_time_shift(min(dev->ibd_failed_failover, 10));
3470 if (kiblnd_dev_can_failover(dev)) {
3471 list_add_tail(&dev->ibd_fail_list,
3472 &kiblnd_data.kib_failed_devs);
3478 /* long sleep if no more pending failover */
3479 long_sleep = list_empty(&kiblnd_data.kib_failed_devs);
3481 set_current_state(TASK_INTERRUPTIBLE);
3482 add_wait_queue(&kiblnd_data.kib_failover_waitq, &wait);
3483 write_unlock_irqrestore(glock, flags);
3485 rc = schedule_timeout(long_sleep ? cfs_time_seconds(10) :
3486 cfs_time_seconds(1));
3487 set_current_state(TASK_RUNNING);
3488 remove_wait_queue(&kiblnd_data.kib_failover_waitq, &wait);
3489 write_lock_irqsave(glock, flags);
3491 if (!long_sleep || rc != 0)
3494 /* have a long sleep, routine check all active devices,
3495 * we need checking like this because if there is not active
3496 * connection on the dev and no SEND from local, we may listen
3497 * on wrong HCA for ever while there is a bonding failover */
3498 list_for_each_entry(dev, &kiblnd_data.kib_devs, ibd_list) {
3499 if (kiblnd_dev_can_failover(dev)) {
3500 list_add_tail(&dev->ibd_fail_list,
3501 &kiblnd_data.kib_failed_devs);
3506 write_unlock_irqrestore(glock, flags);
3508 kiblnd_thread_fini();