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,
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10 * This program is distributed in the hope that it will be useful, but
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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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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.
31 * This file is part of Lustre, http://www.lustre.org/
32 * Lustre is a trademark of Sun Microsystems, Inc.
34 * lnet/klnds/o2iblnd/o2iblnd_cb.c
36 * Author: Eric Barton <eric@bartonsoftware.com>
42 kiblnd_tx_done (lnet_ni_t *ni, kib_tx_t *tx)
44 lnet_msg_t *lntmsg[2];
45 kib_net_t *net = ni->ni_data;
49 LASSERT (net != NULL);
50 LASSERT (!cfs_in_interrupt());
51 LASSERT (!tx->tx_queued); /* mustn't be queued for sending */
52 LASSERT (tx->tx_sending == 0); /* mustn't be awaiting sent callback */
53 LASSERT (!tx->tx_waiting); /* mustn't be awaiting peer response */
54 LASSERT (tx->tx_pool != NULL);
56 kiblnd_unmap_tx(ni, tx);
58 /* tx may have up to 2 lnet msgs to finalise */
59 lntmsg[0] = tx->tx_lntmsg[0]; tx->tx_lntmsg[0] = NULL;
60 lntmsg[1] = tx->tx_lntmsg[1]; tx->tx_lntmsg[1] = NULL;
63 if (tx->tx_conn != NULL) {
64 LASSERT (ni == tx->tx_conn->ibc_peer->ibp_ni);
66 kiblnd_conn_decref(tx->tx_conn);
73 kiblnd_pool_free_node(&tx->tx_pool->tpo_pool, &tx->tx_list);
75 /* delay finalize until my descs have been freed */
76 for (i = 0; i < 2; i++) {
77 if (lntmsg[i] == NULL)
80 lnet_finalize(ni, lntmsg[i], rc);
85 kiblnd_txlist_done (lnet_ni_t *ni, cfs_list_t *txlist, int status)
89 while (!cfs_list_empty (txlist)) {
90 tx = cfs_list_entry (txlist->next, kib_tx_t, tx_list);
92 cfs_list_del(&tx->tx_list);
95 tx->tx_status = status;
96 kiblnd_tx_done(ni, tx);
101 kiblnd_get_idle_tx(lnet_ni_t *ni, lnet_nid_t target)
103 kib_net_t *net = (kib_net_t *)ni->ni_data;
106 kib_tx_poolset_t *tps;
108 tps = net->ibn_tx_ps[lnet_cpt_of_nid(target)];
109 node = kiblnd_pool_alloc_node(&tps->tps_poolset);
112 tx = container_of(node, kib_tx_t, tx_list);
114 LASSERT (tx->tx_nwrq == 0);
115 LASSERT (!tx->tx_queued);
116 LASSERT (tx->tx_sending == 0);
117 LASSERT (!tx->tx_waiting);
118 LASSERT (tx->tx_status == 0);
119 LASSERT (tx->tx_conn == NULL);
120 LASSERT (tx->tx_lntmsg[0] == NULL);
121 LASSERT (tx->tx_lntmsg[1] == NULL);
122 LASSERT (tx->tx_u.pmr == NULL);
123 LASSERT (tx->tx_nfrags == 0);
129 kiblnd_drop_rx(kib_rx_t *rx)
131 kib_conn_t *conn = rx->rx_conn;
132 struct kib_sched_info *sched = conn->ibc_sched;
135 cfs_spin_lock_irqsave(&sched->ibs_lock, flags);
136 LASSERT(conn->ibc_nrx > 0);
138 cfs_spin_unlock_irqrestore(&sched->ibs_lock, flags);
140 kiblnd_conn_decref(conn);
144 kiblnd_post_rx (kib_rx_t *rx, int credit)
146 kib_conn_t *conn = rx->rx_conn;
147 kib_net_t *net = conn->ibc_peer->ibp_ni->ni_data;
148 struct ib_recv_wr *bad_wrq = NULL;
152 LASSERT (net != NULL);
153 LASSERT (!cfs_in_interrupt());
154 LASSERT (credit == IBLND_POSTRX_NO_CREDIT ||
155 credit == IBLND_POSTRX_PEER_CREDIT ||
156 credit == IBLND_POSTRX_RSRVD_CREDIT);
158 mr = kiblnd_find_dma_mr(conn->ibc_hdev, rx->rx_msgaddr, IBLND_MSG_SIZE);
159 LASSERT (mr != NULL);
161 rx->rx_sge.lkey = mr->lkey;
162 rx->rx_sge.addr = rx->rx_msgaddr;
163 rx->rx_sge.length = IBLND_MSG_SIZE;
165 rx->rx_wrq.next = NULL;
166 rx->rx_wrq.sg_list = &rx->rx_sge;
167 rx->rx_wrq.num_sge = 1;
168 rx->rx_wrq.wr_id = kiblnd_ptr2wreqid(rx, IBLND_WID_RX);
170 LASSERT (conn->ibc_state >= IBLND_CONN_INIT);
171 LASSERT (rx->rx_nob >= 0); /* not posted */
173 if (conn->ibc_state > IBLND_CONN_ESTABLISHED) {
174 kiblnd_drop_rx(rx); /* No more posts for this rx */
178 rx->rx_nob = -1; /* flag posted */
180 rc = ib_post_recv(conn->ibc_cmid->qp, &rx->rx_wrq, &bad_wrq);
182 CERROR("Can't post rx for %s: %d, bad_wrq: %p\n",
183 libcfs_nid2str(conn->ibc_peer->ibp_nid), rc, bad_wrq);
187 if (conn->ibc_state < IBLND_CONN_ESTABLISHED) /* Initial post */
191 kiblnd_close_conn(conn, rc);
192 kiblnd_drop_rx(rx); /* No more posts for this rx */
196 if (credit == IBLND_POSTRX_NO_CREDIT)
199 cfs_spin_lock(&conn->ibc_lock);
200 if (credit == IBLND_POSTRX_PEER_CREDIT)
201 conn->ibc_outstanding_credits++;
203 conn->ibc_reserved_credits++;
204 cfs_spin_unlock(&conn->ibc_lock);
206 kiblnd_check_sends(conn);
211 kiblnd_find_waiting_tx_locked(kib_conn_t *conn, int txtype, __u64 cookie)
215 cfs_list_for_each(tmp, &conn->ibc_active_txs) {
216 kib_tx_t *tx = cfs_list_entry(tmp, kib_tx_t, tx_list);
218 LASSERT (!tx->tx_queued);
219 LASSERT (tx->tx_sending != 0 || tx->tx_waiting);
221 if (tx->tx_cookie != cookie)
224 if (tx->tx_waiting &&
225 tx->tx_msg->ibm_type == txtype)
228 CWARN("Bad completion: %swaiting, type %x (wanted %x)\n",
229 tx->tx_waiting ? "" : "NOT ",
230 tx->tx_msg->ibm_type, txtype);
236 kiblnd_handle_completion(kib_conn_t *conn, int txtype, int status, __u64 cookie)
239 lnet_ni_t *ni = conn->ibc_peer->ibp_ni;
242 cfs_spin_lock(&conn->ibc_lock);
244 tx = kiblnd_find_waiting_tx_locked(conn, txtype, cookie);
246 cfs_spin_unlock(&conn->ibc_lock);
248 CWARN("Unmatched completion type %x cookie "LPX64" from %s\n",
249 txtype, cookie, libcfs_nid2str(conn->ibc_peer->ibp_nid));
250 kiblnd_close_conn(conn, -EPROTO);
254 if (tx->tx_status == 0) { /* success so far */
255 if (status < 0) { /* failed? */
256 tx->tx_status = status;
257 } else if (txtype == IBLND_MSG_GET_REQ) {
258 lnet_set_reply_msg_len(ni, tx->tx_lntmsg[1], status);
264 idle = !tx->tx_queued && (tx->tx_sending == 0);
266 cfs_list_del(&tx->tx_list);
268 cfs_spin_unlock(&conn->ibc_lock);
271 kiblnd_tx_done(ni, tx);
275 kiblnd_send_completion(kib_conn_t *conn, int type, int status, __u64 cookie)
277 lnet_ni_t *ni = conn->ibc_peer->ibp_ni;
278 kib_tx_t *tx = kiblnd_get_idle_tx(ni, conn->ibc_peer->ibp_nid);
281 CERROR("Can't get tx for completion %x for %s\n",
282 type, libcfs_nid2str(conn->ibc_peer->ibp_nid));
286 tx->tx_msg->ibm_u.completion.ibcm_status = status;
287 tx->tx_msg->ibm_u.completion.ibcm_cookie = cookie;
288 kiblnd_init_tx_msg(ni, tx, type, sizeof(kib_completion_msg_t));
290 kiblnd_queue_tx(tx, conn);
294 kiblnd_handle_rx (kib_rx_t *rx)
296 kib_msg_t *msg = rx->rx_msg;
297 kib_conn_t *conn = rx->rx_conn;
298 lnet_ni_t *ni = conn->ibc_peer->ibp_ni;
299 int credits = msg->ibm_credits;
305 LASSERT (conn->ibc_state >= IBLND_CONN_ESTABLISHED);
307 CDEBUG (D_NET, "Received %x[%d] from %s\n",
308 msg->ibm_type, credits,
309 libcfs_nid2str(conn->ibc_peer->ibp_nid));
312 /* Have I received credits that will let me send? */
313 cfs_spin_lock(&conn->ibc_lock);
315 if (conn->ibc_credits + credits >
316 IBLND_MSG_QUEUE_SIZE(conn->ibc_version)) {
317 rc2 = conn->ibc_credits;
318 cfs_spin_unlock(&conn->ibc_lock);
320 CERROR("Bad credits from %s: %d + %d > %d\n",
321 libcfs_nid2str(conn->ibc_peer->ibp_nid),
323 IBLND_MSG_QUEUE_SIZE(conn->ibc_version));
325 kiblnd_close_conn(conn, -EPROTO);
326 kiblnd_post_rx(rx, IBLND_POSTRX_NO_CREDIT);
330 conn->ibc_credits += credits;
332 /* This ensures the credit taken by NOOP can be returned */
333 if (msg->ibm_type == IBLND_MSG_NOOP &&
334 !IBLND_OOB_CAPABLE(conn->ibc_version)) /* v1 only */
335 conn->ibc_outstanding_credits++;
337 cfs_spin_unlock(&conn->ibc_lock);
338 kiblnd_check_sends(conn);
341 switch (msg->ibm_type) {
343 CERROR("Bad IBLND message type %x from %s\n",
344 msg->ibm_type, libcfs_nid2str(conn->ibc_peer->ibp_nid));
345 post_credit = IBLND_POSTRX_NO_CREDIT;
350 if (IBLND_OOB_CAPABLE(conn->ibc_version)) {
351 post_credit = IBLND_POSTRX_NO_CREDIT;
355 if (credits != 0) /* credit already posted */
356 post_credit = IBLND_POSTRX_NO_CREDIT;
357 else /* a keepalive NOOP */
358 post_credit = IBLND_POSTRX_PEER_CREDIT;
361 case IBLND_MSG_IMMEDIATE:
362 post_credit = IBLND_POSTRX_DONT_POST;
363 rc = lnet_parse(ni, &msg->ibm_u.immediate.ibim_hdr,
364 msg->ibm_srcnid, rx, 0);
365 if (rc < 0) /* repost on error */
366 post_credit = IBLND_POSTRX_PEER_CREDIT;
369 case IBLND_MSG_PUT_REQ:
370 post_credit = IBLND_POSTRX_DONT_POST;
371 rc = lnet_parse(ni, &msg->ibm_u.putreq.ibprm_hdr,
372 msg->ibm_srcnid, rx, 1);
373 if (rc < 0) /* repost on error */
374 post_credit = IBLND_POSTRX_PEER_CREDIT;
377 case IBLND_MSG_PUT_NAK:
378 CWARN ("PUT_NACK from %s\n",
379 libcfs_nid2str(conn->ibc_peer->ibp_nid));
380 post_credit = IBLND_POSTRX_RSRVD_CREDIT;
381 kiblnd_handle_completion(conn, IBLND_MSG_PUT_REQ,
382 msg->ibm_u.completion.ibcm_status,
383 msg->ibm_u.completion.ibcm_cookie);
386 case IBLND_MSG_PUT_ACK:
387 post_credit = IBLND_POSTRX_RSRVD_CREDIT;
389 cfs_spin_lock(&conn->ibc_lock);
390 tx = kiblnd_find_waiting_tx_locked(conn, IBLND_MSG_PUT_REQ,
391 msg->ibm_u.putack.ibpam_src_cookie);
393 cfs_list_del(&tx->tx_list);
394 cfs_spin_unlock(&conn->ibc_lock);
397 CERROR("Unmatched PUT_ACK from %s\n",
398 libcfs_nid2str(conn->ibc_peer->ibp_nid));
403 LASSERT (tx->tx_waiting);
404 /* CAVEAT EMPTOR: I could be racing with tx_complete, but...
405 * (a) I can overwrite tx_msg since my peer has received it!
406 * (b) tx_waiting set tells tx_complete() it's not done. */
408 tx->tx_nwrq = 0; /* overwrite PUT_REQ */
410 rc2 = kiblnd_init_rdma(conn, tx, IBLND_MSG_PUT_DONE,
411 kiblnd_rd_size(&msg->ibm_u.putack.ibpam_rd),
412 &msg->ibm_u.putack.ibpam_rd,
413 msg->ibm_u.putack.ibpam_dst_cookie);
415 CERROR("Can't setup rdma for PUT to %s: %d\n",
416 libcfs_nid2str(conn->ibc_peer->ibp_nid), rc2);
418 cfs_spin_lock(&conn->ibc_lock);
419 tx->tx_waiting = 0; /* clear waiting and queue atomically */
420 kiblnd_queue_tx_locked(tx, conn);
421 cfs_spin_unlock(&conn->ibc_lock);
424 case IBLND_MSG_PUT_DONE:
425 post_credit = IBLND_POSTRX_PEER_CREDIT;
426 kiblnd_handle_completion(conn, IBLND_MSG_PUT_ACK,
427 msg->ibm_u.completion.ibcm_status,
428 msg->ibm_u.completion.ibcm_cookie);
431 case IBLND_MSG_GET_REQ:
432 post_credit = IBLND_POSTRX_DONT_POST;
433 rc = lnet_parse(ni, &msg->ibm_u.get.ibgm_hdr,
434 msg->ibm_srcnid, rx, 1);
435 if (rc < 0) /* repost on error */
436 post_credit = IBLND_POSTRX_PEER_CREDIT;
439 case IBLND_MSG_GET_DONE:
440 post_credit = IBLND_POSTRX_RSRVD_CREDIT;
441 kiblnd_handle_completion(conn, IBLND_MSG_GET_REQ,
442 msg->ibm_u.completion.ibcm_status,
443 msg->ibm_u.completion.ibcm_cookie);
447 if (rc < 0) /* protocol error */
448 kiblnd_close_conn(conn, rc);
450 if (post_credit != IBLND_POSTRX_DONT_POST)
451 kiblnd_post_rx(rx, post_credit);
455 kiblnd_rx_complete (kib_rx_t *rx, int status, int nob)
457 kib_msg_t *msg = rx->rx_msg;
458 kib_conn_t *conn = rx->rx_conn;
459 lnet_ni_t *ni = conn->ibc_peer->ibp_ni;
460 kib_net_t *net = ni->ni_data;
464 LASSERT (net != NULL);
465 LASSERT (rx->rx_nob < 0); /* was posted */
466 rx->rx_nob = 0; /* isn't now */
468 if (conn->ibc_state > IBLND_CONN_ESTABLISHED)
471 if (status != IB_WC_SUCCESS) {
472 CNETERR("Rx from %s failed: %d\n",
473 libcfs_nid2str(conn->ibc_peer->ibp_nid), status);
480 rc = kiblnd_unpack_msg(msg, rx->rx_nob);
482 CERROR ("Error %d unpacking rx from %s\n",
483 rc, libcfs_nid2str(conn->ibc_peer->ibp_nid));
487 if (msg->ibm_srcnid != conn->ibc_peer->ibp_nid ||
488 msg->ibm_dstnid != ni->ni_nid ||
489 msg->ibm_srcstamp != conn->ibc_incarnation ||
490 msg->ibm_dststamp != net->ibn_incarnation) {
491 CERROR ("Stale rx from %s\n",
492 libcfs_nid2str(conn->ibc_peer->ibp_nid));
497 /* set time last known alive */
498 kiblnd_peer_alive(conn->ibc_peer);
500 /* racing with connection establishment/teardown! */
502 if (conn->ibc_state < IBLND_CONN_ESTABLISHED) {
503 cfs_rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
506 cfs_write_lock_irqsave(g_lock, flags);
507 /* must check holding global lock to eliminate race */
508 if (conn->ibc_state < IBLND_CONN_ESTABLISHED) {
509 cfs_list_add_tail(&rx->rx_list, &conn->ibc_early_rxs);
510 cfs_write_unlock_irqrestore(g_lock, flags);
513 cfs_write_unlock_irqrestore(g_lock, flags);
515 kiblnd_handle_rx(rx);
519 CDEBUG(D_NET, "rx %p conn %p\n", rx, conn);
520 kiblnd_close_conn(conn, err);
522 kiblnd_drop_rx(rx); /* Don't re-post rx. */
526 kiblnd_kvaddr_to_page (unsigned long vaddr)
530 if (vaddr >= VMALLOC_START &&
531 vaddr < VMALLOC_END) {
532 page = vmalloc_to_page ((void *)vaddr);
533 LASSERT (page != NULL);
536 #ifdef CONFIG_HIGHMEM
537 if (vaddr >= PKMAP_BASE &&
538 vaddr < (PKMAP_BASE + LAST_PKMAP * PAGE_SIZE)) {
539 /* No highmem pages only used for bulk (kiov) I/O */
540 CERROR("find page for address in highmem\n");
544 page = virt_to_page (vaddr);
545 LASSERT (page != NULL);
550 kiblnd_fmr_map_tx(kib_net_t *net, kib_tx_t *tx, kib_rdma_desc_t *rd, int nob)
552 kib_hca_dev_t *hdev = tx->tx_pool->tpo_hdev;
553 __u64 *pages = tx->tx_pages;
554 kib_fmr_poolset_t *fps;
561 for (i = 0, npages = 0; i < rd->rd_nfrags; i++) {
562 for (size = 0; size < rd->rd_frags[i].rf_nob;
563 size += hdev->ibh_page_size) {
564 pages[npages ++] = (rd->rd_frags[i].rf_addr &
565 hdev->ibh_page_mask) + size;
569 LASSERT(tx->tx_pool != NULL);
570 LASSERT(tx->tx_pool->tpo_pool.po_owner != NULL);
572 cpt = tx->tx_pool->tpo_pool.po_owner->ps_cpt;
574 fps = net->ibn_fmr_ps[cpt];
575 rc = kiblnd_fmr_pool_map(fps, pages, npages, 0, &tx->tx_u.fmr);
577 CERROR ("Can't map %d pages: %d\n", npages, rc);
581 /* If rd is not tx_rd, it's going to get sent to a peer, who will need
583 rd->rd_key = (rd != tx->tx_rd) ? tx->tx_u.fmr.fmr_pfmr->fmr->rkey :
584 tx->tx_u.fmr.fmr_pfmr->fmr->lkey;
585 rd->rd_frags[0].rf_addr &= ~hdev->ibh_page_mask;
586 rd->rd_frags[0].rf_nob = nob;
593 kiblnd_pmr_map_tx(kib_net_t *net, kib_tx_t *tx, kib_rdma_desc_t *rd, int nob)
595 kib_hca_dev_t *hdev = tx->tx_pool->tpo_hdev;
596 kib_pmr_poolset_t *pps;
601 iova = rd->rd_frags[0].rf_addr & ~hdev->ibh_page_mask;
603 LASSERT(tx->tx_pool != NULL);
604 LASSERT(tx->tx_pool->tpo_pool.po_owner != NULL);
606 cpt = tx->tx_pool->tpo_pool.po_owner->ps_cpt;
608 pps = net->ibn_pmr_ps[cpt];
609 rc = kiblnd_pmr_pool_map(pps, hdev, rd, &iova, &tx->tx_u.pmr);
611 CERROR("Failed to create MR by phybuf: %d\n", rc);
615 /* If rd is not tx_rd, it's going to get sent to a peer, who will need
617 rd->rd_key = (rd != tx->tx_rd) ? tx->tx_u.pmr->pmr_mr->rkey :
618 tx->tx_u.pmr->pmr_mr->lkey;
620 rd->rd_frags[0].rf_addr = iova;
621 rd->rd_frags[0].rf_nob = nob;
627 kiblnd_unmap_tx(lnet_ni_t *ni, kib_tx_t *tx)
629 kib_net_t *net = ni->ni_data;
631 LASSERT(net != NULL);
633 if (net->ibn_fmr_ps != NULL && tx->tx_u.fmr.fmr_pfmr != NULL) {
634 kiblnd_fmr_pool_unmap(&tx->tx_u.fmr, tx->tx_status);
635 tx->tx_u.fmr.fmr_pfmr = NULL;
637 } else if (net->ibn_pmr_ps != NULL && tx->tx_u.pmr != NULL) {
638 kiblnd_pmr_pool_unmap(tx->tx_u.pmr);
642 if (tx->tx_nfrags != 0) {
643 kiblnd_dma_unmap_sg(tx->tx_pool->tpo_hdev->ibh_ibdev,
644 tx->tx_frags, tx->tx_nfrags, tx->tx_dmadir);
650 kiblnd_map_tx(lnet_ni_t *ni, kib_tx_t *tx,
651 kib_rdma_desc_t *rd, int nfrags)
653 kib_hca_dev_t *hdev = tx->tx_pool->tpo_hdev;
654 kib_net_t *net = ni->ni_data;
655 struct ib_mr *mr = NULL;
659 /* If rd is not tx_rd, it's going to get sent to a peer and I'm the
661 tx->tx_dmadir = (rd != tx->tx_rd) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
662 tx->tx_nfrags = nfrags;
665 kiblnd_dma_map_sg(hdev->ibh_ibdev,
666 tx->tx_frags, tx->tx_nfrags, tx->tx_dmadir);
668 for (i = 0, nob = 0; i < rd->rd_nfrags; i++) {
669 rd->rd_frags[i].rf_nob = kiblnd_sg_dma_len(
670 hdev->ibh_ibdev, &tx->tx_frags[i]);
671 rd->rd_frags[i].rf_addr = kiblnd_sg_dma_address(
672 hdev->ibh_ibdev, &tx->tx_frags[i]);
673 nob += rd->rd_frags[i].rf_nob;
676 /* looking for pre-mapping MR */
677 mr = kiblnd_find_rd_dma_mr(hdev, rd);
679 /* found pre-mapping MR */
680 rd->rd_key = (rd != tx->tx_rd) ? mr->rkey : mr->lkey;
684 if (net->ibn_fmr_ps != NULL)
685 return kiblnd_fmr_map_tx(net, tx, rd, nob);
686 else if (net->ibn_pmr_ps != NULL)
687 return kiblnd_pmr_map_tx(net, tx, rd, nob);
694 kiblnd_setup_rd_iov(lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd,
695 unsigned int niov, struct iovec *iov, int offset, int nob)
697 kib_net_t *net = ni->ni_data;
699 struct scatterlist *sg;
706 LASSERT (net != NULL);
708 while (offset >= iov->iov_len) {
709 offset -= iov->iov_len;
719 vaddr = ((unsigned long)iov->iov_base) + offset;
720 page_offset = vaddr & (PAGE_SIZE - 1);
721 page = kiblnd_kvaddr_to_page(vaddr);
723 CERROR ("Can't find page\n");
727 fragnob = min((int)(iov->iov_len - offset), nob);
728 fragnob = min(fragnob, (int)PAGE_SIZE - page_offset);
730 sg_set_page(sg, page, fragnob, page_offset);
733 if (offset + fragnob < iov->iov_len) {
743 return kiblnd_map_tx(ni, tx, rd, sg - tx->tx_frags);
747 kiblnd_setup_rd_kiov (lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd,
748 int nkiov, lnet_kiov_t *kiov, int offset, int nob)
750 kib_net_t *net = ni->ni_data;
751 struct scatterlist *sg;
754 CDEBUG(D_NET, "niov %d offset %d nob %d\n", nkiov, offset, nob);
758 LASSERT (net != NULL);
760 while (offset >= kiov->kiov_len) {
761 offset -= kiov->kiov_len;
771 fragnob = min((int)(kiov->kiov_len - offset), nob);
773 sg_set_page(sg, kiov->kiov_page, fragnob,
774 kiov->kiov_offset + offset);
783 return kiblnd_map_tx(ni, tx, rd, sg - tx->tx_frags);
787 kiblnd_post_tx_locked (kib_conn_t *conn, kib_tx_t *tx, int credit)
789 kib_msg_t *msg = tx->tx_msg;
790 kib_peer_t *peer = conn->ibc_peer;
791 int ver = conn->ibc_version;
794 struct ib_send_wr *bad_wrq;
796 LASSERT (tx->tx_queued);
797 /* We rely on this for QP sizing */
798 LASSERT (tx->tx_nwrq > 0);
799 LASSERT (tx->tx_nwrq <= 1 + IBLND_RDMA_FRAGS(ver));
801 LASSERT (credit == 0 || credit == 1);
802 LASSERT (conn->ibc_outstanding_credits >= 0);
803 LASSERT (conn->ibc_outstanding_credits <= IBLND_MSG_QUEUE_SIZE(ver));
804 LASSERT (conn->ibc_credits >= 0);
805 LASSERT (conn->ibc_credits <= IBLND_MSG_QUEUE_SIZE(ver));
807 if (conn->ibc_nsends_posted == IBLND_CONCURRENT_SENDS(ver)) {
808 /* tx completions outstanding... */
809 CDEBUG(D_NET, "%s: posted enough\n",
810 libcfs_nid2str(peer->ibp_nid));
814 if (credit != 0 && conn->ibc_credits == 0) { /* no credits */
815 CDEBUG(D_NET, "%s: no credits\n",
816 libcfs_nid2str(peer->ibp_nid));
820 if (credit != 0 && !IBLND_OOB_CAPABLE(ver) &&
821 conn->ibc_credits == 1 && /* last credit reserved */
822 msg->ibm_type != IBLND_MSG_NOOP) { /* for NOOP */
823 CDEBUG(D_NET, "%s: not using last credit\n",
824 libcfs_nid2str(peer->ibp_nid));
828 /* NB don't drop ibc_lock before bumping tx_sending */
829 cfs_list_del(&tx->tx_list);
832 if (msg->ibm_type == IBLND_MSG_NOOP &&
833 (!kiblnd_need_noop(conn) || /* redundant NOOP */
834 (IBLND_OOB_CAPABLE(ver) && /* posted enough NOOP */
835 conn->ibc_noops_posted == IBLND_OOB_MSGS(ver)))) {
836 /* OK to drop when posted enough NOOPs, since
837 * kiblnd_check_sends will queue NOOP again when
838 * posted NOOPs complete */
839 cfs_spin_unlock(&conn->ibc_lock);
840 kiblnd_tx_done(peer->ibp_ni, tx);
841 cfs_spin_lock(&conn->ibc_lock);
842 CDEBUG(D_NET, "%s(%d): redundant or enough NOOP\n",
843 libcfs_nid2str(peer->ibp_nid),
844 conn->ibc_noops_posted);
848 kiblnd_pack_msg(peer->ibp_ni, msg, ver, conn->ibc_outstanding_credits,
849 peer->ibp_nid, conn->ibc_incarnation);
851 conn->ibc_credits -= credit;
852 conn->ibc_outstanding_credits = 0;
853 conn->ibc_nsends_posted++;
854 if (msg->ibm_type == IBLND_MSG_NOOP)
855 conn->ibc_noops_posted++;
857 /* CAVEAT EMPTOR! This tx could be the PUT_DONE of an RDMA
858 * PUT. If so, it was first queued here as a PUT_REQ, sent and
859 * stashed on ibc_active_txs, matched by an incoming PUT_ACK,
860 * and then re-queued here. It's (just) possible that
861 * tx_sending is non-zero if we've not done the tx_complete()
862 * from the first send; hence the ++ rather than = below. */
864 cfs_list_add(&tx->tx_list, &conn->ibc_active_txs);
866 /* I'm still holding ibc_lock! */
867 if (conn->ibc_state != IBLND_CONN_ESTABLISHED) {
869 } else if (tx->tx_pool->tpo_pool.po_failed ||
870 conn->ibc_hdev != tx->tx_pool->tpo_hdev) {
871 /* close_conn will launch failover */
874 rc = ib_post_send(conn->ibc_cmid->qp,
875 tx->tx_wrq, &bad_wrq);
878 conn->ibc_last_send = jiffies;
883 /* NB credits are transferred in the actual
884 * message, which can only be the last work item */
885 conn->ibc_credits += credit;
886 conn->ibc_outstanding_credits += msg->ibm_credits;
887 conn->ibc_nsends_posted--;
888 if (msg->ibm_type == IBLND_MSG_NOOP)
889 conn->ibc_noops_posted--;
895 done = (tx->tx_sending == 0);
897 cfs_list_del(&tx->tx_list);
899 cfs_spin_unlock(&conn->ibc_lock);
901 if (conn->ibc_state == IBLND_CONN_ESTABLISHED)
902 CERROR("Error %d posting transmit to %s\n",
903 rc, libcfs_nid2str(peer->ibp_nid));
905 CDEBUG(D_NET, "Error %d posting transmit to %s\n",
906 rc, libcfs_nid2str(peer->ibp_nid));
908 kiblnd_close_conn(conn, rc);
911 kiblnd_tx_done(peer->ibp_ni, tx);
913 cfs_spin_lock(&conn->ibc_lock);
919 kiblnd_check_sends (kib_conn_t *conn)
921 int ver = conn->ibc_version;
922 lnet_ni_t *ni = conn->ibc_peer->ibp_ni;
925 /* Don't send anything until after the connection is established */
926 if (conn->ibc_state < IBLND_CONN_ESTABLISHED) {
927 CDEBUG(D_NET, "%s too soon\n",
928 libcfs_nid2str(conn->ibc_peer->ibp_nid));
932 cfs_spin_lock(&conn->ibc_lock);
934 LASSERT (conn->ibc_nsends_posted <= IBLND_CONCURRENT_SENDS(ver));
935 LASSERT (!IBLND_OOB_CAPABLE(ver) ||
936 conn->ibc_noops_posted <= IBLND_OOB_MSGS(ver));
937 LASSERT (conn->ibc_reserved_credits >= 0);
939 while (conn->ibc_reserved_credits > 0 &&
940 !cfs_list_empty(&conn->ibc_tx_queue_rsrvd)) {
941 tx = cfs_list_entry(conn->ibc_tx_queue_rsrvd.next,
943 cfs_list_del(&tx->tx_list);
944 cfs_list_add_tail(&tx->tx_list, &conn->ibc_tx_queue);
945 conn->ibc_reserved_credits--;
948 if (kiblnd_need_noop(conn)) {
949 cfs_spin_unlock(&conn->ibc_lock);
951 tx = kiblnd_get_idle_tx(ni, conn->ibc_peer->ibp_nid);
953 kiblnd_init_tx_msg(ni, tx, IBLND_MSG_NOOP, 0);
955 cfs_spin_lock(&conn->ibc_lock);
957 kiblnd_queue_tx_locked(tx, conn);
960 kiblnd_conn_addref(conn); /* 1 ref for me.... (see b21911) */
965 if (!cfs_list_empty(&conn->ibc_tx_queue_nocred)) {
967 tx = cfs_list_entry(conn->ibc_tx_queue_nocred.next,
969 } else if (!cfs_list_empty(&conn->ibc_tx_noops)) {
970 LASSERT (!IBLND_OOB_CAPABLE(ver));
972 tx = cfs_list_entry(conn->ibc_tx_noops.next,
974 } else if (!cfs_list_empty(&conn->ibc_tx_queue)) {
976 tx = cfs_list_entry(conn->ibc_tx_queue.next,
981 if (kiblnd_post_tx_locked(conn, tx, credit) != 0)
985 cfs_spin_unlock(&conn->ibc_lock);
987 kiblnd_conn_decref(conn); /* ...until here */
991 kiblnd_tx_complete (kib_tx_t *tx, int status)
993 int failed = (status != IB_WC_SUCCESS);
994 kib_conn_t *conn = tx->tx_conn;
997 LASSERT (tx->tx_sending > 0);
1000 if (conn->ibc_state == IBLND_CONN_ESTABLISHED)
1001 CNETERR("Tx -> %s cookie "LPX64
1002 " sending %d waiting %d: failed %d\n",
1003 libcfs_nid2str(conn->ibc_peer->ibp_nid),
1004 tx->tx_cookie, tx->tx_sending, tx->tx_waiting,
1007 kiblnd_close_conn(conn, -EIO);
1009 kiblnd_peer_alive(conn->ibc_peer);
1012 cfs_spin_lock(&conn->ibc_lock);
1014 /* I could be racing with rdma completion. Whoever makes 'tx' idle
1015 * gets to free it, which also drops its ref on 'conn'. */
1018 conn->ibc_nsends_posted--;
1019 if (tx->tx_msg->ibm_type == IBLND_MSG_NOOP)
1020 conn->ibc_noops_posted--;
1023 tx->tx_waiting = 0; /* don't wait for peer */
1024 tx->tx_status = -EIO;
1027 idle = (tx->tx_sending == 0) && /* This is the final callback */
1028 !tx->tx_waiting && /* Not waiting for peer */
1029 !tx->tx_queued; /* Not re-queued (PUT_DONE) */
1031 cfs_list_del(&tx->tx_list);
1033 kiblnd_conn_addref(conn); /* 1 ref for me.... */
1035 cfs_spin_unlock(&conn->ibc_lock);
1038 kiblnd_tx_done(conn->ibc_peer->ibp_ni, tx);
1040 kiblnd_check_sends(conn);
1042 kiblnd_conn_decref(conn); /* ...until here */
1046 kiblnd_init_tx_msg (lnet_ni_t *ni, kib_tx_t *tx, int type, int body_nob)
1048 kib_hca_dev_t *hdev = tx->tx_pool->tpo_hdev;
1049 struct ib_sge *sge = &tx->tx_sge[tx->tx_nwrq];
1050 struct ib_send_wr *wrq = &tx->tx_wrq[tx->tx_nwrq];
1051 int nob = offsetof (kib_msg_t, ibm_u) + body_nob;
1054 LASSERT (tx->tx_nwrq >= 0);
1055 LASSERT (tx->tx_nwrq < IBLND_MAX_RDMA_FRAGS + 1);
1056 LASSERT (nob <= IBLND_MSG_SIZE);
1058 kiblnd_init_msg(tx->tx_msg, type, body_nob);
1060 mr = kiblnd_find_dma_mr(hdev, tx->tx_msgaddr, nob);
1061 LASSERT (mr != NULL);
1063 sge->lkey = mr->lkey;
1064 sge->addr = tx->tx_msgaddr;
1067 memset(wrq, 0, sizeof(*wrq));
1070 wrq->wr_id = kiblnd_ptr2wreqid(tx, IBLND_WID_TX);
1073 wrq->opcode = IB_WR_SEND;
1074 wrq->send_flags = IB_SEND_SIGNALED;
1080 kiblnd_init_rdma (kib_conn_t *conn, kib_tx_t *tx, int type,
1081 int resid, kib_rdma_desc_t *dstrd, __u64 dstcookie)
1083 kib_msg_t *ibmsg = tx->tx_msg;
1084 kib_rdma_desc_t *srcrd = tx->tx_rd;
1085 struct ib_sge *sge = &tx->tx_sge[0];
1086 struct ib_send_wr *wrq = &tx->tx_wrq[0];
1092 LASSERT (!cfs_in_interrupt());
1093 LASSERT (tx->tx_nwrq == 0);
1094 LASSERT (type == IBLND_MSG_GET_DONE ||
1095 type == IBLND_MSG_PUT_DONE);
1097 srcidx = dstidx = 0;
1100 if (srcidx >= srcrd->rd_nfrags) {
1101 CERROR("Src buffer exhausted: %d frags\n", srcidx);
1106 if (dstidx == dstrd->rd_nfrags) {
1107 CERROR("Dst buffer exhausted: %d frags\n", dstidx);
1112 if (tx->tx_nwrq == IBLND_RDMA_FRAGS(conn->ibc_version)) {
1113 CERROR("RDMA too fragmented for %s (%d): "
1114 "%d/%d src %d/%d dst frags\n",
1115 libcfs_nid2str(conn->ibc_peer->ibp_nid),
1116 IBLND_RDMA_FRAGS(conn->ibc_version),
1117 srcidx, srcrd->rd_nfrags,
1118 dstidx, dstrd->rd_nfrags);
1123 wrknob = MIN(MIN(kiblnd_rd_frag_size(srcrd, srcidx),
1124 kiblnd_rd_frag_size(dstrd, dstidx)), resid);
1126 sge = &tx->tx_sge[tx->tx_nwrq];
1127 sge->addr = kiblnd_rd_frag_addr(srcrd, srcidx);
1128 sge->lkey = kiblnd_rd_frag_key(srcrd, srcidx);
1129 sge->length = wrknob;
1131 wrq = &tx->tx_wrq[tx->tx_nwrq];
1133 wrq->next = wrq + 1;
1134 wrq->wr_id = kiblnd_ptr2wreqid(tx, IBLND_WID_RDMA);
1137 wrq->opcode = IB_WR_RDMA_WRITE;
1138 wrq->send_flags = 0;
1140 wrq->wr.rdma.remote_addr = kiblnd_rd_frag_addr(dstrd, dstidx);
1141 wrq->wr.rdma.rkey = kiblnd_rd_frag_key(dstrd, dstidx);
1143 srcidx = kiblnd_rd_consume_frag(srcrd, srcidx, wrknob);
1144 dstidx = kiblnd_rd_consume_frag(dstrd, dstidx, wrknob);
1153 if (rc < 0) /* no RDMA if completing with failure */
1156 ibmsg->ibm_u.completion.ibcm_status = rc;
1157 ibmsg->ibm_u.completion.ibcm_cookie = dstcookie;
1158 kiblnd_init_tx_msg(conn->ibc_peer->ibp_ni, tx,
1159 type, sizeof (kib_completion_msg_t));
1165 kiblnd_queue_tx_locked (kib_tx_t *tx, kib_conn_t *conn)
1169 LASSERT (tx->tx_nwrq > 0); /* work items set up */
1170 LASSERT (!tx->tx_queued); /* not queued for sending already */
1171 LASSERT (conn->ibc_state >= IBLND_CONN_ESTABLISHED);
1174 tx->tx_deadline = jiffies + (*kiblnd_tunables.kib_timeout * CFS_HZ);
1176 if (tx->tx_conn == NULL) {
1177 kiblnd_conn_addref(conn);
1179 LASSERT (tx->tx_msg->ibm_type != IBLND_MSG_PUT_DONE);
1181 /* PUT_DONE first attached to conn as a PUT_REQ */
1182 LASSERT (tx->tx_conn == conn);
1183 LASSERT (tx->tx_msg->ibm_type == IBLND_MSG_PUT_DONE);
1186 switch (tx->tx_msg->ibm_type) {
1190 case IBLND_MSG_PUT_REQ:
1191 case IBLND_MSG_GET_REQ:
1192 q = &conn->ibc_tx_queue_rsrvd;
1195 case IBLND_MSG_PUT_NAK:
1196 case IBLND_MSG_PUT_ACK:
1197 case IBLND_MSG_PUT_DONE:
1198 case IBLND_MSG_GET_DONE:
1199 q = &conn->ibc_tx_queue_nocred;
1202 case IBLND_MSG_NOOP:
1203 if (IBLND_OOB_CAPABLE(conn->ibc_version))
1204 q = &conn->ibc_tx_queue_nocred;
1206 q = &conn->ibc_tx_noops;
1209 case IBLND_MSG_IMMEDIATE:
1210 q = &conn->ibc_tx_queue;
1214 cfs_list_add_tail(&tx->tx_list, q);
1218 kiblnd_queue_tx (kib_tx_t *tx, kib_conn_t *conn)
1220 cfs_spin_lock(&conn->ibc_lock);
1221 kiblnd_queue_tx_locked(tx, conn);
1222 cfs_spin_unlock(&conn->ibc_lock);
1224 kiblnd_check_sends(conn);
1227 static int kiblnd_resolve_addr(struct rdma_cm_id *cmid,
1228 struct sockaddr_in *srcaddr,
1229 struct sockaddr_in *dstaddr,
1232 unsigned short port;
1235 #ifdef HAVE_OFED_RDMA_SET_REUSEADDR
1236 /* allow the port to be reused */
1237 rc = rdma_set_reuseaddr(cmid, 1);
1239 CERROR("Unable to set reuse on cmid: %d\n", rc);
1244 /* look for a free privileged port */
1245 for (port = PROT_SOCK-1; port > 0; port--) {
1246 srcaddr->sin_port = htons(port);
1247 rc = rdma_resolve_addr(cmid,
1248 (struct sockaddr *)srcaddr,
1249 (struct sockaddr *)dstaddr,
1252 CDEBUG(D_NET, "bound to port %hu\n", port);
1254 } else if (rc == -EADDRINUSE || rc == -EADDRNOTAVAIL) {
1255 CDEBUG(D_NET, "bind to port %hu failed: %d\n",
1262 CERROR("Failed to bind to a free privileged port\n");
1263 #ifndef HAVE_OFED_RDMA_SET_REUSEADDR
1264 CERROR("You may need IB verbs that supports rdma_set_reuseaddr()\n");
1270 kiblnd_connect_peer (kib_peer_t *peer)
1272 struct rdma_cm_id *cmid;
1274 kib_net_t *net = peer->ibp_ni->ni_data;
1275 struct sockaddr_in srcaddr;
1276 struct sockaddr_in dstaddr;
1279 LASSERT (net != NULL);
1280 LASSERT (peer->ibp_connecting > 0);
1282 cmid = kiblnd_rdma_create_id(kiblnd_cm_callback, peer, RDMA_PS_TCP,
1286 CERROR("Can't create CMID for %s: %ld\n",
1287 libcfs_nid2str(peer->ibp_nid), PTR_ERR(cmid));
1293 memset(&srcaddr, 0, sizeof(srcaddr));
1294 srcaddr.sin_family = AF_INET;
1295 srcaddr.sin_addr.s_addr = htonl(dev->ibd_ifip);
1297 memset(&dstaddr, 0, sizeof(dstaddr));
1298 dstaddr.sin_family = AF_INET;
1299 dstaddr.sin_port = htons(*kiblnd_tunables.kib_service);
1300 dstaddr.sin_addr.s_addr = htonl(LNET_NIDADDR(peer->ibp_nid));
1302 kiblnd_peer_addref(peer); /* cmid's ref */
1304 if (*kiblnd_tunables.kib_use_priv_port) {
1305 rc = kiblnd_resolve_addr(cmid, &srcaddr, &dstaddr,
1306 *kiblnd_tunables.kib_timeout * 1000);
1308 rc = rdma_resolve_addr(cmid,
1309 (struct sockaddr *)&srcaddr,
1310 (struct sockaddr *)&dstaddr,
1311 *kiblnd_tunables.kib_timeout * 1000);
1314 /* Can't initiate address resolution: */
1315 CERROR("Can't resolve addr for %s: %d\n",
1316 libcfs_nid2str(peer->ibp_nid), rc);
1320 LASSERT (cmid->device != NULL);
1321 CDEBUG(D_NET, "%s: connection bound to %s:%u.%u.%u.%u:%s\n",
1322 libcfs_nid2str(peer->ibp_nid), dev->ibd_ifname,
1323 HIPQUAD(dev->ibd_ifip), cmid->device->name);
1328 kiblnd_peer_decref(peer); /* cmid's ref */
1329 rdma_destroy_id(cmid);
1331 kiblnd_peer_connect_failed(peer, 1, rc);
1335 kiblnd_launch_tx (lnet_ni_t *ni, kib_tx_t *tx, lnet_nid_t nid)
1340 cfs_rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
1341 unsigned long flags;
1344 /* If I get here, I've committed to send, so I complete the tx with
1345 * failure on any problems */
1347 LASSERT (tx == NULL || tx->tx_conn == NULL); /* only set when assigned a conn */
1348 LASSERT (tx == NULL || tx->tx_nwrq > 0); /* work items have been set up */
1350 /* First time, just use a read lock since I expect to find my peer
1352 cfs_read_lock_irqsave(g_lock, flags);
1354 peer = kiblnd_find_peer_locked(nid);
1355 if (peer != NULL && !cfs_list_empty(&peer->ibp_conns)) {
1356 /* Found a peer with an established connection */
1357 conn = kiblnd_get_conn_locked(peer);
1358 kiblnd_conn_addref(conn); /* 1 ref for me... */
1360 cfs_read_unlock_irqrestore(g_lock, flags);
1363 kiblnd_queue_tx(tx, conn);
1364 kiblnd_conn_decref(conn); /* ...to here */
1368 cfs_read_unlock(g_lock);
1369 /* Re-try with a write lock */
1370 cfs_write_lock(g_lock);
1372 peer = kiblnd_find_peer_locked(nid);
1374 if (cfs_list_empty(&peer->ibp_conns)) {
1375 /* found a peer, but it's still connecting... */
1376 LASSERT (peer->ibp_connecting != 0 ||
1377 peer->ibp_accepting != 0);
1379 cfs_list_add_tail(&tx->tx_list,
1380 &peer->ibp_tx_queue);
1381 cfs_write_unlock_irqrestore(g_lock, flags);
1383 conn = kiblnd_get_conn_locked(peer);
1384 kiblnd_conn_addref(conn); /* 1 ref for me... */
1386 cfs_write_unlock_irqrestore(g_lock, flags);
1389 kiblnd_queue_tx(tx, conn);
1390 kiblnd_conn_decref(conn); /* ...to here */
1395 cfs_write_unlock_irqrestore(g_lock, flags);
1397 /* Allocate a peer ready to add to the peer table and retry */
1398 rc = kiblnd_create_peer(ni, &peer, nid);
1400 CERROR("Can't create peer %s\n", libcfs_nid2str(nid));
1402 tx->tx_status = -EHOSTUNREACH;
1404 kiblnd_tx_done(ni, tx);
1409 cfs_write_lock_irqsave(g_lock, flags);
1411 peer2 = kiblnd_find_peer_locked(nid);
1412 if (peer2 != NULL) {
1413 if (cfs_list_empty(&peer2->ibp_conns)) {
1414 /* found a peer, but it's still connecting... */
1415 LASSERT (peer2->ibp_connecting != 0 ||
1416 peer2->ibp_accepting != 0);
1418 cfs_list_add_tail(&tx->tx_list,
1419 &peer2->ibp_tx_queue);
1420 cfs_write_unlock_irqrestore(g_lock, flags);
1422 conn = kiblnd_get_conn_locked(peer2);
1423 kiblnd_conn_addref(conn); /* 1 ref for me... */
1425 cfs_write_unlock_irqrestore(g_lock, flags);
1428 kiblnd_queue_tx(tx, conn);
1429 kiblnd_conn_decref(conn); /* ...to here */
1432 kiblnd_peer_decref(peer);
1436 /* Brand new peer */
1437 LASSERT (peer->ibp_connecting == 0);
1438 peer->ibp_connecting = 1;
1440 /* always called with a ref on ni, which prevents ni being shutdown */
1441 LASSERT (((kib_net_t *)ni->ni_data)->ibn_shutdown == 0);
1444 cfs_list_add_tail(&tx->tx_list, &peer->ibp_tx_queue);
1446 kiblnd_peer_addref(peer);
1447 cfs_list_add_tail(&peer->ibp_list, kiblnd_nid2peerlist(nid));
1449 cfs_write_unlock_irqrestore(g_lock, flags);
1451 kiblnd_connect_peer(peer);
1452 kiblnd_peer_decref(peer);
1456 kiblnd_send (lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg)
1458 lnet_hdr_t *hdr = &lntmsg->msg_hdr;
1459 int type = lntmsg->msg_type;
1460 lnet_process_id_t target = lntmsg->msg_target;
1461 int target_is_router = lntmsg->msg_target_is_router;
1462 int routing = lntmsg->msg_routing;
1463 unsigned int payload_niov = lntmsg->msg_niov;
1464 struct iovec *payload_iov = lntmsg->msg_iov;
1465 lnet_kiov_t *payload_kiov = lntmsg->msg_kiov;
1466 unsigned int payload_offset = lntmsg->msg_offset;
1467 unsigned int payload_nob = lntmsg->msg_len;
1473 /* NB 'private' is different depending on what we're sending.... */
1475 CDEBUG(D_NET, "sending %d bytes in %d frags to %s\n",
1476 payload_nob, payload_niov, libcfs_id2str(target));
1478 LASSERT (payload_nob == 0 || payload_niov > 0);
1479 LASSERT (payload_niov <= LNET_MAX_IOV);
1481 /* Thread context */
1482 LASSERT (!cfs_in_interrupt());
1483 /* payload is either all vaddrs or all pages */
1484 LASSERT (!(payload_kiov != NULL && payload_iov != NULL));
1492 LASSERT (payload_nob == 0);
1496 if (routing || target_is_router)
1497 break; /* send IMMEDIATE */
1499 /* is the REPLY message too small for RDMA? */
1500 nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[lntmsg->msg_md->md_length]);
1501 if (nob <= IBLND_MSG_SIZE)
1502 break; /* send IMMEDIATE */
1504 tx = kiblnd_get_idle_tx(ni, target.nid);
1506 CERROR("Can't allocate txd for GET to %s\n",
1507 libcfs_nid2str(target.nid));
1513 if ((lntmsg->msg_md->md_options & LNET_MD_KIOV) == 0)
1514 rc = kiblnd_setup_rd_iov(ni, tx,
1515 &ibmsg->ibm_u.get.ibgm_rd,
1516 lntmsg->msg_md->md_niov,
1517 lntmsg->msg_md->md_iov.iov,
1518 0, lntmsg->msg_md->md_length);
1520 rc = kiblnd_setup_rd_kiov(ni, tx,
1521 &ibmsg->ibm_u.get.ibgm_rd,
1522 lntmsg->msg_md->md_niov,
1523 lntmsg->msg_md->md_iov.kiov,
1524 0, lntmsg->msg_md->md_length);
1526 CERROR("Can't setup GET sink for %s: %d\n",
1527 libcfs_nid2str(target.nid), rc);
1528 kiblnd_tx_done(ni, tx);
1532 nob = offsetof(kib_get_msg_t, ibgm_rd.rd_frags[tx->tx_nfrags]);
1533 ibmsg->ibm_u.get.ibgm_cookie = tx->tx_cookie;
1534 ibmsg->ibm_u.get.ibgm_hdr = *hdr;
1536 kiblnd_init_tx_msg(ni, tx, IBLND_MSG_GET_REQ, nob);
1538 tx->tx_lntmsg[1] = lnet_create_reply_msg(ni, lntmsg);
1539 if (tx->tx_lntmsg[1] == NULL) {
1540 CERROR("Can't create reply for GET -> %s\n",
1541 libcfs_nid2str(target.nid));
1542 kiblnd_tx_done(ni, tx);
1546 tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg[0,1] on completion */
1547 tx->tx_waiting = 1; /* waiting for GET_DONE */
1548 kiblnd_launch_tx(ni, tx, target.nid);
1551 case LNET_MSG_REPLY:
1553 /* Is the payload small enough not to need RDMA? */
1554 nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[payload_nob]);
1555 if (nob <= IBLND_MSG_SIZE)
1556 break; /* send IMMEDIATE */
1558 tx = kiblnd_get_idle_tx(ni, target.nid);
1560 CERROR("Can't allocate %s txd for %s\n",
1561 type == LNET_MSG_PUT ? "PUT" : "REPLY",
1562 libcfs_nid2str(target.nid));
1566 if (payload_kiov == NULL)
1567 rc = kiblnd_setup_rd_iov(ni, tx, tx->tx_rd,
1568 payload_niov, payload_iov,
1569 payload_offset, payload_nob);
1571 rc = kiblnd_setup_rd_kiov(ni, tx, tx->tx_rd,
1572 payload_niov, payload_kiov,
1573 payload_offset, payload_nob);
1575 CERROR("Can't setup PUT src for %s: %d\n",
1576 libcfs_nid2str(target.nid), rc);
1577 kiblnd_tx_done(ni, tx);
1582 ibmsg->ibm_u.putreq.ibprm_hdr = *hdr;
1583 ibmsg->ibm_u.putreq.ibprm_cookie = tx->tx_cookie;
1584 kiblnd_init_tx_msg(ni, tx, IBLND_MSG_PUT_REQ, sizeof(kib_putreq_msg_t));
1586 tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */
1587 tx->tx_waiting = 1; /* waiting for PUT_{ACK,NAK} */
1588 kiblnd_launch_tx(ni, tx, target.nid);
1592 /* send IMMEDIATE */
1594 LASSERT (offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[payload_nob])
1597 tx = kiblnd_get_idle_tx(ni, target.nid);
1599 CERROR ("Can't send %d to %s: tx descs exhausted\n",
1600 type, libcfs_nid2str(target.nid));
1605 ibmsg->ibm_u.immediate.ibim_hdr = *hdr;
1607 if (payload_kiov != NULL)
1608 lnet_copy_kiov2flat(IBLND_MSG_SIZE, ibmsg,
1609 offsetof(kib_msg_t, ibm_u.immediate.ibim_payload),
1610 payload_niov, payload_kiov,
1611 payload_offset, payload_nob);
1613 lnet_copy_iov2flat(IBLND_MSG_SIZE, ibmsg,
1614 offsetof(kib_msg_t, ibm_u.immediate.ibim_payload),
1615 payload_niov, payload_iov,
1616 payload_offset, payload_nob);
1618 nob = offsetof(kib_immediate_msg_t, ibim_payload[payload_nob]);
1619 kiblnd_init_tx_msg(ni, tx, IBLND_MSG_IMMEDIATE, nob);
1621 tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */
1622 kiblnd_launch_tx(ni, tx, target.nid);
1627 kiblnd_reply (lnet_ni_t *ni, kib_rx_t *rx, lnet_msg_t *lntmsg)
1629 lnet_process_id_t target = lntmsg->msg_target;
1630 unsigned int niov = lntmsg->msg_niov;
1631 struct iovec *iov = lntmsg->msg_iov;
1632 lnet_kiov_t *kiov = lntmsg->msg_kiov;
1633 unsigned int offset = lntmsg->msg_offset;
1634 unsigned int nob = lntmsg->msg_len;
1638 tx = kiblnd_get_idle_tx(ni, rx->rx_conn->ibc_peer->ibp_nid);
1640 CERROR("Can't get tx for REPLY to %s\n",
1641 libcfs_nid2str(target.nid));
1647 else if (kiov == NULL)
1648 rc = kiblnd_setup_rd_iov(ni, tx, tx->tx_rd,
1649 niov, iov, offset, nob);
1651 rc = kiblnd_setup_rd_kiov(ni, tx, tx->tx_rd,
1652 niov, kiov, offset, nob);
1655 CERROR("Can't setup GET src for %s: %d\n",
1656 libcfs_nid2str(target.nid), rc);
1660 rc = kiblnd_init_rdma(rx->rx_conn, tx,
1661 IBLND_MSG_GET_DONE, nob,
1662 &rx->rx_msg->ibm_u.get.ibgm_rd,
1663 rx->rx_msg->ibm_u.get.ibgm_cookie);
1665 CERROR("Can't setup rdma for GET from %s: %d\n",
1666 libcfs_nid2str(target.nid), rc);
1671 /* No RDMA: local completion may happen now! */
1672 lnet_finalize(ni, lntmsg, 0);
1674 /* RDMA: lnet_finalize(lntmsg) when it
1676 tx->tx_lntmsg[0] = lntmsg;
1679 kiblnd_queue_tx(tx, rx->rx_conn);
1683 kiblnd_tx_done(ni, tx);
1685 lnet_finalize(ni, lntmsg, -EIO);
1689 kiblnd_recv (lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg, int delayed,
1690 unsigned int niov, struct iovec *iov, lnet_kiov_t *kiov,
1691 unsigned int offset, unsigned int mlen, unsigned int rlen)
1693 kib_rx_t *rx = private;
1694 kib_msg_t *rxmsg = rx->rx_msg;
1695 kib_conn_t *conn = rx->rx_conn;
1699 int post_credit = IBLND_POSTRX_PEER_CREDIT;
1702 LASSERT (mlen <= rlen);
1703 LASSERT (!cfs_in_interrupt());
1704 /* Either all pages or all vaddrs */
1705 LASSERT (!(kiov != NULL && iov != NULL));
1707 switch (rxmsg->ibm_type) {
1711 case IBLND_MSG_IMMEDIATE:
1712 nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[rlen]);
1713 if (nob > rx->rx_nob) {
1714 CERROR ("Immediate message from %s too big: %d(%d)\n",
1715 libcfs_nid2str(rxmsg->ibm_u.immediate.ibim_hdr.src_nid),
1722 lnet_copy_flat2kiov(niov, kiov, offset,
1723 IBLND_MSG_SIZE, rxmsg,
1724 offsetof(kib_msg_t, ibm_u.immediate.ibim_payload),
1727 lnet_copy_flat2iov(niov, iov, offset,
1728 IBLND_MSG_SIZE, rxmsg,
1729 offsetof(kib_msg_t, ibm_u.immediate.ibim_payload),
1731 lnet_finalize (ni, lntmsg, 0);
1734 case IBLND_MSG_PUT_REQ:
1736 lnet_finalize(ni, lntmsg, 0);
1737 kiblnd_send_completion(rx->rx_conn, IBLND_MSG_PUT_NAK, 0,
1738 rxmsg->ibm_u.putreq.ibprm_cookie);
1742 tx = kiblnd_get_idle_tx(ni, conn->ibc_peer->ibp_nid);
1744 CERROR("Can't allocate tx for %s\n",
1745 libcfs_nid2str(conn->ibc_peer->ibp_nid));
1746 /* Not replying will break the connection */
1753 rc = kiblnd_setup_rd_iov(ni, tx,
1754 &txmsg->ibm_u.putack.ibpam_rd,
1755 niov, iov, offset, mlen);
1757 rc = kiblnd_setup_rd_kiov(ni, tx,
1758 &txmsg->ibm_u.putack.ibpam_rd,
1759 niov, kiov, offset, mlen);
1761 CERROR("Can't setup PUT sink for %s: %d\n",
1762 libcfs_nid2str(conn->ibc_peer->ibp_nid), rc);
1763 kiblnd_tx_done(ni, tx);
1764 /* tell peer it's over */
1765 kiblnd_send_completion(rx->rx_conn, IBLND_MSG_PUT_NAK, rc,
1766 rxmsg->ibm_u.putreq.ibprm_cookie);
1770 nob = offsetof(kib_putack_msg_t, ibpam_rd.rd_frags[tx->tx_nfrags]);
1771 txmsg->ibm_u.putack.ibpam_src_cookie = rxmsg->ibm_u.putreq.ibprm_cookie;
1772 txmsg->ibm_u.putack.ibpam_dst_cookie = tx->tx_cookie;
1774 kiblnd_init_tx_msg(ni, tx, IBLND_MSG_PUT_ACK, nob);
1776 tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */
1777 tx->tx_waiting = 1; /* waiting for PUT_DONE */
1778 kiblnd_queue_tx(tx, conn);
1780 /* reposted buffer reserved for PUT_DONE */
1781 post_credit = IBLND_POSTRX_NO_CREDIT;
1784 case IBLND_MSG_GET_REQ:
1785 if (lntmsg != NULL) {
1786 /* Optimized GET; RDMA lntmsg's payload */
1787 kiblnd_reply(ni, rx, lntmsg);
1789 /* GET didn't match anything */
1790 kiblnd_send_completion(rx->rx_conn, IBLND_MSG_GET_DONE,
1792 rxmsg->ibm_u.get.ibgm_cookie);
1797 kiblnd_post_rx(rx, post_credit);
1802 kiblnd_thread_start (int (*fn)(void *arg), void *arg)
1804 long pid = cfs_create_thread (fn, arg, 0);
1809 cfs_atomic_inc (&kiblnd_data.kib_nthreads);
1814 kiblnd_thread_fini (void)
1816 cfs_atomic_dec (&kiblnd_data.kib_nthreads);
1820 kiblnd_peer_alive (kib_peer_t *peer)
1822 /* This is racy, but everyone's only writing cfs_time_current() */
1823 peer->ibp_last_alive = cfs_time_current();
1828 kiblnd_peer_notify (kib_peer_t *peer)
1831 cfs_time_t last_alive = 0;
1832 unsigned long flags;
1834 cfs_read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1836 if (cfs_list_empty(&peer->ibp_conns) &&
1837 peer->ibp_accepting == 0 &&
1838 peer->ibp_connecting == 0 &&
1839 peer->ibp_error != 0) {
1840 error = peer->ibp_error;
1841 peer->ibp_error = 0;
1843 last_alive = peer->ibp_last_alive;
1846 cfs_read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1849 lnet_notify(peer->ibp_ni,
1850 peer->ibp_nid, 0, last_alive);
1854 kiblnd_close_conn_locked (kib_conn_t *conn, int error)
1856 /* This just does the immediate housekeeping. 'error' is zero for a
1857 * normal shutdown which can happen only after the connection has been
1858 * established. If the connection is established, schedule the
1859 * connection to be finished off by the connd. Otherwise the connd is
1860 * already dealing with it (either to set it up or tear it down).
1861 * Caller holds kib_global_lock exclusively in irq context */
1862 kib_peer_t *peer = conn->ibc_peer;
1864 unsigned long flags;
1866 LASSERT (error != 0 || conn->ibc_state >= IBLND_CONN_ESTABLISHED);
1868 if (error != 0 && conn->ibc_comms_error == 0)
1869 conn->ibc_comms_error = error;
1871 if (conn->ibc_state != IBLND_CONN_ESTABLISHED)
1872 return; /* already being handled */
1875 cfs_list_empty(&conn->ibc_tx_noops) &&
1876 cfs_list_empty(&conn->ibc_tx_queue) &&
1877 cfs_list_empty(&conn->ibc_tx_queue_rsrvd) &&
1878 cfs_list_empty(&conn->ibc_tx_queue_nocred) &&
1879 cfs_list_empty(&conn->ibc_active_txs)) {
1880 CDEBUG(D_NET, "closing conn to %s\n",
1881 libcfs_nid2str(peer->ibp_nid));
1883 CNETERR("Closing conn to %s: error %d%s%s%s%s%s\n",
1884 libcfs_nid2str(peer->ibp_nid), error,
1885 cfs_list_empty(&conn->ibc_tx_queue) ? "" : "(sending)",
1886 cfs_list_empty(&conn->ibc_tx_noops) ? "" : "(sending_noops)",
1887 cfs_list_empty(&conn->ibc_tx_queue_rsrvd) ? "" : "(sending_rsrvd)",
1888 cfs_list_empty(&conn->ibc_tx_queue_nocred) ? "" : "(sending_nocred)",
1889 cfs_list_empty(&conn->ibc_active_txs) ? "" : "(waiting)");
1892 dev = ((kib_net_t *)peer->ibp_ni->ni_data)->ibn_dev;
1893 cfs_list_del(&conn->ibc_list);
1894 /* connd (see below) takes over ibc_list's ref */
1896 if (cfs_list_empty (&peer->ibp_conns) && /* no more conns */
1897 kiblnd_peer_active(peer)) { /* still in peer table */
1898 kiblnd_unlink_peer_locked(peer);
1900 /* set/clear error on last conn */
1901 peer->ibp_error = conn->ibc_comms_error;
1904 kiblnd_set_conn_state(conn, IBLND_CONN_CLOSING);
1907 kiblnd_dev_can_failover(dev)) {
1908 cfs_list_add_tail(&dev->ibd_fail_list,
1909 &kiblnd_data.kib_failed_devs);
1910 cfs_waitq_signal(&kiblnd_data.kib_failover_waitq);
1913 cfs_spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags);
1915 cfs_list_add_tail (&conn->ibc_list, &kiblnd_data.kib_connd_conns);
1916 cfs_waitq_signal (&kiblnd_data.kib_connd_waitq);
1918 cfs_spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags);
1922 kiblnd_close_conn (kib_conn_t *conn, int error)
1924 unsigned long flags;
1926 cfs_write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1928 kiblnd_close_conn_locked(conn, error);
1930 cfs_write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1934 kiblnd_handle_early_rxs(kib_conn_t *conn)
1936 unsigned long flags;
1939 LASSERT (!cfs_in_interrupt());
1940 LASSERT (conn->ibc_state >= IBLND_CONN_ESTABLISHED);
1942 cfs_write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1943 while (!cfs_list_empty(&conn->ibc_early_rxs)) {
1944 rx = cfs_list_entry(conn->ibc_early_rxs.next,
1946 cfs_list_del(&rx->rx_list);
1947 cfs_write_unlock_irqrestore(&kiblnd_data.kib_global_lock,
1950 kiblnd_handle_rx(rx);
1952 cfs_write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1954 cfs_write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1958 kiblnd_abort_txs(kib_conn_t *conn, cfs_list_t *txs)
1960 CFS_LIST_HEAD (zombies);
1965 cfs_spin_lock(&conn->ibc_lock);
1967 cfs_list_for_each_safe (tmp, nxt, txs) {
1968 tx = cfs_list_entry (tmp, kib_tx_t, tx_list);
1970 if (txs == &conn->ibc_active_txs) {
1971 LASSERT (!tx->tx_queued);
1972 LASSERT (tx->tx_waiting ||
1973 tx->tx_sending != 0);
1975 LASSERT (tx->tx_queued);
1978 tx->tx_status = -ECONNABORTED;
1981 if (tx->tx_sending == 0) {
1983 cfs_list_del (&tx->tx_list);
1984 cfs_list_add (&tx->tx_list, &zombies);
1988 cfs_spin_unlock(&conn->ibc_lock);
1990 kiblnd_txlist_done(conn->ibc_peer->ibp_ni,
1991 &zombies, -ECONNABORTED);
1995 kiblnd_finalise_conn (kib_conn_t *conn)
1997 LASSERT (!cfs_in_interrupt());
1998 LASSERT (conn->ibc_state > IBLND_CONN_INIT);
2000 kiblnd_set_conn_state(conn, IBLND_CONN_DISCONNECTED);
2002 /* abort_receives moves QP state to IB_QPS_ERR. This is only required
2003 * for connections that didn't get as far as being connected, because
2004 * rdma_disconnect() does this for free. */
2005 kiblnd_abort_receives(conn);
2007 /* Complete all tx descs not waiting for sends to complete.
2008 * NB we should be safe from RDMA now that the QP has changed state */
2010 kiblnd_abort_txs(conn, &conn->ibc_tx_noops);
2011 kiblnd_abort_txs(conn, &conn->ibc_tx_queue);
2012 kiblnd_abort_txs(conn, &conn->ibc_tx_queue_rsrvd);
2013 kiblnd_abort_txs(conn, &conn->ibc_tx_queue_nocred);
2014 kiblnd_abort_txs(conn, &conn->ibc_active_txs);
2016 kiblnd_handle_early_rxs(conn);
2020 kiblnd_peer_connect_failed (kib_peer_t *peer, int active, int error)
2022 CFS_LIST_HEAD (zombies);
2023 unsigned long flags;
2025 LASSERT (error != 0);
2026 LASSERT (!cfs_in_interrupt());
2028 cfs_write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2031 LASSERT (peer->ibp_connecting > 0);
2032 peer->ibp_connecting--;
2034 LASSERT (peer->ibp_accepting > 0);
2035 peer->ibp_accepting--;
2038 if (peer->ibp_connecting != 0 ||
2039 peer->ibp_accepting != 0) {
2040 /* another connection attempt under way... */
2041 cfs_write_unlock_irqrestore(&kiblnd_data.kib_global_lock,
2046 if (cfs_list_empty(&peer->ibp_conns)) {
2047 /* Take peer's blocked transmits to complete with error */
2048 cfs_list_add(&zombies, &peer->ibp_tx_queue);
2049 cfs_list_del_init(&peer->ibp_tx_queue);
2051 if (kiblnd_peer_active(peer))
2052 kiblnd_unlink_peer_locked(peer);
2054 peer->ibp_error = error;
2056 /* Can't have blocked transmits if there are connections */
2057 LASSERT (cfs_list_empty(&peer->ibp_tx_queue));
2060 cfs_write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2062 kiblnd_peer_notify(peer);
2064 if (cfs_list_empty (&zombies))
2067 CNETERR("Deleting messages for %s: connection failed\n",
2068 libcfs_nid2str(peer->ibp_nid));
2070 kiblnd_txlist_done(peer->ibp_ni, &zombies, -EHOSTUNREACH);
2074 kiblnd_connreq_done(kib_conn_t *conn, int status)
2076 kib_peer_t *peer = conn->ibc_peer;
2079 unsigned long flags;
2082 active = (conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT);
2084 CDEBUG(D_NET,"%s: active(%d), version(%x), status(%d)\n",
2085 libcfs_nid2str(peer->ibp_nid), active,
2086 conn->ibc_version, status);
2088 LASSERT (!cfs_in_interrupt());
2089 LASSERT ((conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT &&
2090 peer->ibp_connecting > 0) ||
2091 (conn->ibc_state == IBLND_CONN_PASSIVE_WAIT &&
2092 peer->ibp_accepting > 0));
2094 LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars));
2095 conn->ibc_connvars = NULL;
2098 /* failed to establish connection */
2099 kiblnd_peer_connect_failed(peer, active, status);
2100 kiblnd_finalise_conn(conn);
2104 /* connection established */
2105 cfs_write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2107 conn->ibc_last_send = jiffies;
2108 kiblnd_set_conn_state(conn, IBLND_CONN_ESTABLISHED);
2109 kiblnd_peer_alive(peer);
2111 /* Add conn to peer's list and nuke any dangling conns from a different
2112 * peer instance... */
2113 kiblnd_conn_addref(conn); /* +1 ref for ibc_list */
2114 cfs_list_add(&conn->ibc_list, &peer->ibp_conns);
2116 peer->ibp_connecting--;
2118 peer->ibp_accepting--;
2120 if (peer->ibp_version == 0) {
2121 peer->ibp_version = conn->ibc_version;
2122 peer->ibp_incarnation = conn->ibc_incarnation;
2125 if (peer->ibp_version != conn->ibc_version ||
2126 peer->ibp_incarnation != conn->ibc_incarnation) {
2127 kiblnd_close_stale_conns_locked(peer, conn->ibc_version,
2128 conn->ibc_incarnation);
2129 peer->ibp_version = conn->ibc_version;
2130 peer->ibp_incarnation = conn->ibc_incarnation;
2133 /* grab pending txs while I have the lock */
2134 cfs_list_add(&txs, &peer->ibp_tx_queue);
2135 cfs_list_del_init(&peer->ibp_tx_queue);
2137 if (!kiblnd_peer_active(peer) || /* peer has been deleted */
2138 conn->ibc_comms_error != 0) { /* error has happened already */
2139 lnet_ni_t *ni = peer->ibp_ni;
2141 /* start to shut down connection */
2142 kiblnd_close_conn_locked(conn, -ECONNABORTED);
2143 cfs_write_unlock_irqrestore(&kiblnd_data.kib_global_lock,
2146 kiblnd_txlist_done(ni, &txs, -ECONNABORTED);
2151 cfs_write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2153 /* Schedule blocked txs */
2154 cfs_spin_lock (&conn->ibc_lock);
2155 while (!cfs_list_empty (&txs)) {
2156 tx = cfs_list_entry (txs.next, kib_tx_t, tx_list);
2157 cfs_list_del(&tx->tx_list);
2159 kiblnd_queue_tx_locked(tx, conn);
2161 cfs_spin_unlock (&conn->ibc_lock);
2163 kiblnd_check_sends(conn);
2165 /* schedule blocked rxs */
2166 kiblnd_handle_early_rxs(conn);
2170 kiblnd_reject(struct rdma_cm_id *cmid, kib_rej_t *rej)
2174 rc = rdma_reject(cmid, rej, sizeof(*rej));
2177 CWARN("Error %d sending reject\n", rc);
2181 kiblnd_passive_connect (struct rdma_cm_id *cmid, void *priv, int priv_nob)
2183 cfs_rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
2184 kib_msg_t *reqmsg = priv;
2190 lnet_ni_t *ni = NULL;
2191 kib_net_t *net = NULL;
2193 struct rdma_conn_param cp;
2195 int version = IBLND_MSG_VERSION;
2196 unsigned long flags;
2198 struct sockaddr_in *peer_addr;
2199 LASSERT (!cfs_in_interrupt());
2201 /* cmid inherits 'context' from the corresponding listener id */
2202 ibdev = (kib_dev_t *)cmid->context;
2203 LASSERT (ibdev != NULL);
2205 memset(&rej, 0, sizeof(rej));
2206 rej.ibr_magic = IBLND_MSG_MAGIC;
2207 rej.ibr_why = IBLND_REJECT_FATAL;
2208 rej.ibr_cp.ibcp_max_msg_size = IBLND_MSG_SIZE;
2210 peer_addr = (struct sockaddr_in *)&(cmid->route.addr.dst_addr);
2211 if (*kiblnd_tunables.kib_require_priv_port &&
2212 ntohs(peer_addr->sin_port) >= PROT_SOCK) {
2213 __u32 ip = ntohl(peer_addr->sin_addr.s_addr);
2214 CERROR("Peer's port (%u.%u.%u.%u:%hu) is not privileged\n",
2215 HIPQUAD(ip), ntohs(peer_addr->sin_port));
2219 if (priv_nob < offsetof(kib_msg_t, ibm_type)) {
2220 CERROR("Short connection request\n");
2224 /* Future protocol version compatibility support! If the
2225 * o2iblnd-specific protocol changes, or when LNET unifies
2226 * protocols over all LNDs, the initial connection will
2227 * negotiate a protocol version. I trap this here to avoid
2228 * console errors; the reject tells the peer which protocol I
2230 if (reqmsg->ibm_magic == LNET_PROTO_MAGIC ||
2231 reqmsg->ibm_magic == __swab32(LNET_PROTO_MAGIC))
2233 if (reqmsg->ibm_magic == IBLND_MSG_MAGIC &&
2234 reqmsg->ibm_version != IBLND_MSG_VERSION &&
2235 reqmsg->ibm_version != IBLND_MSG_VERSION_1)
2237 if (reqmsg->ibm_magic == __swab32(IBLND_MSG_MAGIC) &&
2238 reqmsg->ibm_version != __swab16(IBLND_MSG_VERSION) &&
2239 reqmsg->ibm_version != __swab16(IBLND_MSG_VERSION_1))
2242 rc = kiblnd_unpack_msg(reqmsg, priv_nob);
2244 CERROR("Can't parse connection request: %d\n", rc);
2248 nid = reqmsg->ibm_srcnid;
2249 ni = lnet_net2ni(LNET_NIDNET(reqmsg->ibm_dstnid));
2252 net = (kib_net_t *)ni->ni_data;
2253 rej.ibr_incarnation = net->ibn_incarnation;
2256 if (ni == NULL || /* no matching net */
2257 ni->ni_nid != reqmsg->ibm_dstnid || /* right NET, wrong NID! */
2258 net->ibn_dev != ibdev) { /* wrong device */
2259 CERROR("Can't accept %s on %s (%s:%d:%u.%u.%u.%u): "
2260 "bad dst nid %s\n", libcfs_nid2str(nid),
2261 ni == NULL ? "NA" : libcfs_nid2str(ni->ni_nid),
2262 ibdev->ibd_ifname, ibdev->ibd_nnets,
2263 HIPQUAD(ibdev->ibd_ifip),
2264 libcfs_nid2str(reqmsg->ibm_dstnid));
2269 /* check time stamp as soon as possible */
2270 if (reqmsg->ibm_dststamp != 0 &&
2271 reqmsg->ibm_dststamp != net->ibn_incarnation) {
2272 CWARN("Stale connection request\n");
2273 rej.ibr_why = IBLND_REJECT_CONN_STALE;
2277 /* I can accept peer's version */
2278 version = reqmsg->ibm_version;
2280 if (reqmsg->ibm_type != IBLND_MSG_CONNREQ) {
2281 CERROR("Unexpected connreq msg type: %x from %s\n",
2282 reqmsg->ibm_type, libcfs_nid2str(nid));
2286 if (reqmsg->ibm_u.connparams.ibcp_queue_depth !=
2287 IBLND_MSG_QUEUE_SIZE(version)) {
2288 CERROR("Can't accept %s: incompatible queue depth %d (%d wanted)\n",
2289 libcfs_nid2str(nid), reqmsg->ibm_u.connparams.ibcp_queue_depth,
2290 IBLND_MSG_QUEUE_SIZE(version));
2292 if (version == IBLND_MSG_VERSION)
2293 rej.ibr_why = IBLND_REJECT_MSG_QUEUE_SIZE;
2298 if (reqmsg->ibm_u.connparams.ibcp_max_frags !=
2299 IBLND_RDMA_FRAGS(version)) {
2300 CERROR("Can't accept %s(version %x): "
2301 "incompatible max_frags %d (%d wanted)\n",
2302 libcfs_nid2str(nid), version,
2303 reqmsg->ibm_u.connparams.ibcp_max_frags,
2304 IBLND_RDMA_FRAGS(version));
2306 if (version == IBLND_MSG_VERSION)
2307 rej.ibr_why = IBLND_REJECT_RDMA_FRAGS;
2313 if (reqmsg->ibm_u.connparams.ibcp_max_msg_size > IBLND_MSG_SIZE) {
2314 CERROR("Can't accept %s: message size %d too big (%d max)\n",
2315 libcfs_nid2str(nid),
2316 reqmsg->ibm_u.connparams.ibcp_max_msg_size,
2321 /* assume 'nid' is a new peer; create */
2322 rc = kiblnd_create_peer(ni, &peer, nid);
2324 CERROR("Can't create peer for %s\n", libcfs_nid2str(nid));
2325 rej.ibr_why = IBLND_REJECT_NO_RESOURCES;
2329 cfs_write_lock_irqsave(g_lock, flags);
2331 peer2 = kiblnd_find_peer_locked(nid);
2332 if (peer2 != NULL) {
2333 if (peer2->ibp_version == 0) {
2334 peer2->ibp_version = version;
2335 peer2->ibp_incarnation = reqmsg->ibm_srcstamp;
2338 /* not the guy I've talked with */
2339 if (peer2->ibp_incarnation != reqmsg->ibm_srcstamp ||
2340 peer2->ibp_version != version) {
2341 kiblnd_close_peer_conns_locked(peer2, -ESTALE);
2342 cfs_write_unlock_irqrestore(g_lock, flags);
2344 CWARN("Conn stale %s [old ver: %x, new ver: %x]\n",
2345 libcfs_nid2str(nid), peer2->ibp_version, version);
2347 kiblnd_peer_decref(peer);
2348 rej.ibr_why = IBLND_REJECT_CONN_STALE;
2352 /* tie-break connection race in favour of the higher NID */
2353 if (peer2->ibp_connecting != 0 &&
2355 cfs_write_unlock_irqrestore(g_lock, flags);
2357 CWARN("Conn race %s\n", libcfs_nid2str(peer2->ibp_nid));
2359 kiblnd_peer_decref(peer);
2360 rej.ibr_why = IBLND_REJECT_CONN_RACE;
2364 peer2->ibp_accepting++;
2365 kiblnd_peer_addref(peer2);
2367 cfs_write_unlock_irqrestore(g_lock, flags);
2368 kiblnd_peer_decref(peer);
2371 /* Brand new peer */
2372 LASSERT (peer->ibp_accepting == 0);
2373 LASSERT (peer->ibp_version == 0 &&
2374 peer->ibp_incarnation == 0);
2376 peer->ibp_accepting = 1;
2377 peer->ibp_version = version;
2378 peer->ibp_incarnation = reqmsg->ibm_srcstamp;
2380 /* I have a ref on ni that prevents it being shutdown */
2381 LASSERT (net->ibn_shutdown == 0);
2383 kiblnd_peer_addref(peer);
2384 cfs_list_add_tail(&peer->ibp_list, kiblnd_nid2peerlist(nid));
2386 cfs_write_unlock_irqrestore(g_lock, flags);
2389 conn = kiblnd_create_conn(peer, cmid, IBLND_CONN_PASSIVE_WAIT, version);
2391 kiblnd_peer_connect_failed(peer, 0, -ENOMEM);
2392 kiblnd_peer_decref(peer);
2393 rej.ibr_why = IBLND_REJECT_NO_RESOURCES;
2397 /* conn now "owns" cmid, so I return success from here on to ensure the
2398 * CM callback doesn't destroy cmid. */
2400 conn->ibc_incarnation = reqmsg->ibm_srcstamp;
2401 conn->ibc_credits = IBLND_MSG_QUEUE_SIZE(version);
2402 conn->ibc_reserved_credits = IBLND_MSG_QUEUE_SIZE(version);
2403 LASSERT (conn->ibc_credits + conn->ibc_reserved_credits + IBLND_OOB_MSGS(version)
2404 <= IBLND_RX_MSGS(version));
2406 ackmsg = &conn->ibc_connvars->cv_msg;
2407 memset(ackmsg, 0, sizeof(*ackmsg));
2409 kiblnd_init_msg(ackmsg, IBLND_MSG_CONNACK,
2410 sizeof(ackmsg->ibm_u.connparams));
2411 ackmsg->ibm_u.connparams.ibcp_queue_depth = IBLND_MSG_QUEUE_SIZE(version);
2412 ackmsg->ibm_u.connparams.ibcp_max_msg_size = IBLND_MSG_SIZE;
2413 ackmsg->ibm_u.connparams.ibcp_max_frags = IBLND_RDMA_FRAGS(version);
2415 kiblnd_pack_msg(ni, ackmsg, version, 0, nid, reqmsg->ibm_srcstamp);
2417 memset(&cp, 0, sizeof(cp));
2418 cp.private_data = ackmsg;
2419 cp.private_data_len = ackmsg->ibm_nob;
2420 cp.responder_resources = 0; /* No atomic ops or RDMA reads */
2421 cp.initiator_depth = 0;
2422 cp.flow_control = 1;
2423 cp.retry_count = *kiblnd_tunables.kib_retry_count;
2424 cp.rnr_retry_count = *kiblnd_tunables.kib_rnr_retry_count;
2426 CDEBUG(D_NET, "Accept %s\n", libcfs_nid2str(nid));
2428 rc = rdma_accept(cmid, &cp);
2430 CERROR("Can't accept %s: %d\n", libcfs_nid2str(nid), rc);
2431 rej.ibr_version = version;
2432 rej.ibr_why = IBLND_REJECT_FATAL;
2434 kiblnd_reject(cmid, &rej);
2435 kiblnd_connreq_done(conn, rc);
2436 kiblnd_conn_decref(conn);
2446 rej.ibr_version = version;
2447 rej.ibr_cp.ibcp_queue_depth = IBLND_MSG_QUEUE_SIZE(version);
2448 rej.ibr_cp.ibcp_max_frags = IBLND_RDMA_FRAGS(version);
2449 kiblnd_reject(cmid, &rej);
2451 return -ECONNREFUSED;
2455 kiblnd_reconnect (kib_conn_t *conn, int version,
2456 __u64 incarnation, int why, kib_connparams_t *cp)
2458 kib_peer_t *peer = conn->ibc_peer;
2461 unsigned long flags;
2463 LASSERT (conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT);
2464 LASSERT (peer->ibp_connecting > 0); /* 'conn' at least */
2466 cfs_write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2468 /* retry connection if it's still needed and no other connection
2469 * attempts (active or passive) are in progress
2470 * NB: reconnect is still needed even when ibp_tx_queue is
2471 * empty if ibp_version != version because reconnect may be
2472 * initiated by kiblnd_query() */
2473 if ((!cfs_list_empty(&peer->ibp_tx_queue) ||
2474 peer->ibp_version != version) &&
2475 peer->ibp_connecting == 1 &&
2476 peer->ibp_accepting == 0) {
2478 peer->ibp_connecting++;
2480 peer->ibp_version = version;
2481 peer->ibp_incarnation = incarnation;
2484 cfs_write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2494 case IBLND_REJECT_CONN_STALE:
2498 case IBLND_REJECT_CONN_RACE:
2499 reason = "conn race";
2502 case IBLND_REJECT_CONN_UNCOMPAT:
2503 reason = "version negotiation";
2507 CNETERR("%s: retrying (%s), %x, %x, "
2508 "queue_dep: %d, max_frag: %d, msg_size: %d\n",
2509 libcfs_nid2str(peer->ibp_nid),
2510 reason, IBLND_MSG_VERSION, version,
2511 cp != NULL? cp->ibcp_queue_depth :IBLND_MSG_QUEUE_SIZE(version),
2512 cp != NULL? cp->ibcp_max_frags : IBLND_RDMA_FRAGS(version),
2513 cp != NULL? cp->ibcp_max_msg_size: IBLND_MSG_SIZE);
2515 kiblnd_connect_peer(peer);
2519 kiblnd_rejected (kib_conn_t *conn, int reason, void *priv, int priv_nob)
2521 kib_peer_t *peer = conn->ibc_peer;
2523 LASSERT (!cfs_in_interrupt());
2524 LASSERT (conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT);
2527 case IB_CM_REJ_STALE_CONN:
2528 kiblnd_reconnect(conn, IBLND_MSG_VERSION, 0,
2529 IBLND_REJECT_CONN_STALE, NULL);
2532 case IB_CM_REJ_INVALID_SERVICE_ID:
2533 CNETERR("%s rejected: no listener at %d\n",
2534 libcfs_nid2str(peer->ibp_nid),
2535 *kiblnd_tunables.kib_service);
2538 case IB_CM_REJ_CONSUMER_DEFINED:
2539 if (priv_nob >= offsetof(kib_rej_t, ibr_padding)) {
2540 kib_rej_t *rej = priv;
2541 kib_connparams_t *cp = NULL;
2543 __u64 incarnation = -1;
2545 /* NB. default incarnation is -1 because:
2546 * a) V1 will ignore dst incarnation in connreq.
2547 * b) V2 will provide incarnation while rejecting me,
2548 * -1 will be overwrote.
2550 * if I try to connect to a V1 peer with V2 protocol,
2551 * it rejected me then upgrade to V2, I have no idea
2552 * about the upgrading and try to reconnect with V1,
2553 * in this case upgraded V2 can find out I'm trying to
2554 * talk to the old guy and reject me(incarnation is -1).
2557 if (rej->ibr_magic == __swab32(IBLND_MSG_MAGIC) ||
2558 rej->ibr_magic == __swab32(LNET_PROTO_MAGIC)) {
2559 __swab32s(&rej->ibr_magic);
2560 __swab16s(&rej->ibr_version);
2564 if (priv_nob >= sizeof(kib_rej_t) &&
2565 rej->ibr_version > IBLND_MSG_VERSION_1) {
2566 /* priv_nob is always 148 in current version
2567 * of OFED, so we still need to check version.
2568 * (define of IB_CM_REJ_PRIVATE_DATA_SIZE) */
2572 __swab64s(&rej->ibr_incarnation);
2573 __swab16s(&cp->ibcp_queue_depth);
2574 __swab16s(&cp->ibcp_max_frags);
2575 __swab32s(&cp->ibcp_max_msg_size);
2578 incarnation = rej->ibr_incarnation;
2581 if (rej->ibr_magic != IBLND_MSG_MAGIC &&
2582 rej->ibr_magic != LNET_PROTO_MAGIC) {
2583 CERROR("%s rejected: consumer defined fatal error\n",
2584 libcfs_nid2str(peer->ibp_nid));
2588 if (rej->ibr_version != IBLND_MSG_VERSION &&
2589 rej->ibr_version != IBLND_MSG_VERSION_1) {
2590 CERROR("%s rejected: o2iblnd version %x error\n",
2591 libcfs_nid2str(peer->ibp_nid),
2596 if (rej->ibr_why == IBLND_REJECT_FATAL &&
2597 rej->ibr_version == IBLND_MSG_VERSION_1) {
2598 CDEBUG(D_NET, "rejected by old version peer %s: %x\n",
2599 libcfs_nid2str(peer->ibp_nid), rej->ibr_version);
2601 if (conn->ibc_version != IBLND_MSG_VERSION_1)
2602 rej->ibr_why = IBLND_REJECT_CONN_UNCOMPAT;
2605 switch (rej->ibr_why) {
2606 case IBLND_REJECT_CONN_RACE:
2607 case IBLND_REJECT_CONN_STALE:
2608 case IBLND_REJECT_CONN_UNCOMPAT:
2609 kiblnd_reconnect(conn, rej->ibr_version,
2610 incarnation, rej->ibr_why, cp);
2613 case IBLND_REJECT_MSG_QUEUE_SIZE:
2614 CERROR("%s rejected: incompatible message queue depth %d, %d\n",
2615 libcfs_nid2str(peer->ibp_nid), cp->ibcp_queue_depth,
2616 IBLND_MSG_QUEUE_SIZE(conn->ibc_version));
2619 case IBLND_REJECT_RDMA_FRAGS:
2620 CERROR("%s rejected: incompatible # of RDMA fragments %d, %d\n",
2621 libcfs_nid2str(peer->ibp_nid), cp->ibcp_max_frags,
2622 IBLND_RDMA_FRAGS(conn->ibc_version));
2625 case IBLND_REJECT_NO_RESOURCES:
2626 CERROR("%s rejected: o2iblnd no resources\n",
2627 libcfs_nid2str(peer->ibp_nid));
2630 case IBLND_REJECT_FATAL:
2631 CERROR("%s rejected: o2iblnd fatal error\n",
2632 libcfs_nid2str(peer->ibp_nid));
2636 CERROR("%s rejected: o2iblnd reason %d\n",
2637 libcfs_nid2str(peer->ibp_nid),
2645 CNETERR("%s rejected: reason %d, size %d\n",
2646 libcfs_nid2str(peer->ibp_nid), reason, priv_nob);
2650 kiblnd_connreq_done(conn, -ECONNREFUSED);
2654 kiblnd_check_connreply (kib_conn_t *conn, void *priv, int priv_nob)
2656 kib_peer_t *peer = conn->ibc_peer;
2657 lnet_ni_t *ni = peer->ibp_ni;
2658 kib_net_t *net = ni->ni_data;
2659 kib_msg_t *msg = priv;
2660 int ver = conn->ibc_version;
2661 int rc = kiblnd_unpack_msg(msg, priv_nob);
2662 unsigned long flags;
2664 LASSERT (net != NULL);
2667 CERROR("Can't unpack connack from %s: %d\n",
2668 libcfs_nid2str(peer->ibp_nid), rc);
2672 if (msg->ibm_type != IBLND_MSG_CONNACK) {
2673 CERROR("Unexpected message %d from %s\n",
2674 msg->ibm_type, libcfs_nid2str(peer->ibp_nid));
2679 if (ver != msg->ibm_version) {
2680 CERROR("%s replied version %x is different with "
2681 "requested version %x\n",
2682 libcfs_nid2str(peer->ibp_nid), msg->ibm_version, ver);
2687 if (msg->ibm_u.connparams.ibcp_queue_depth !=
2688 IBLND_MSG_QUEUE_SIZE(ver)) {
2689 CERROR("%s has incompatible queue depth %d(%d wanted)\n",
2690 libcfs_nid2str(peer->ibp_nid),
2691 msg->ibm_u.connparams.ibcp_queue_depth,
2692 IBLND_MSG_QUEUE_SIZE(ver));
2697 if (msg->ibm_u.connparams.ibcp_max_frags !=
2698 IBLND_RDMA_FRAGS(ver)) {
2699 CERROR("%s has incompatible max_frags %d (%d wanted)\n",
2700 libcfs_nid2str(peer->ibp_nid),
2701 msg->ibm_u.connparams.ibcp_max_frags,
2702 IBLND_RDMA_FRAGS(ver));
2707 if (msg->ibm_u.connparams.ibcp_max_msg_size > IBLND_MSG_SIZE) {
2708 CERROR("%s max message size %d too big (%d max)\n",
2709 libcfs_nid2str(peer->ibp_nid),
2710 msg->ibm_u.connparams.ibcp_max_msg_size,
2716 cfs_read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2717 if (msg->ibm_dstnid == ni->ni_nid &&
2718 msg->ibm_dststamp == net->ibn_incarnation)
2722 cfs_read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2725 CERROR("Bad connection reply from %s, rc = %d, "
2726 "version: %x max_frags: %d\n",
2727 libcfs_nid2str(peer->ibp_nid), rc,
2728 msg->ibm_version, msg->ibm_u.connparams.ibcp_max_frags);
2732 conn->ibc_incarnation = msg->ibm_srcstamp;
2734 conn->ibc_reserved_credits = IBLND_MSG_QUEUE_SIZE(ver);
2735 LASSERT (conn->ibc_credits + conn->ibc_reserved_credits + IBLND_OOB_MSGS(ver)
2736 <= IBLND_RX_MSGS(ver));
2738 kiblnd_connreq_done(conn, 0);
2742 /* NB My QP has already established itself, so I handle anything going
2743 * wrong here by setting ibc_comms_error.
2744 * kiblnd_connreq_done(0) moves the conn state to ESTABLISHED, but then
2745 * immediately tears it down. */
2748 conn->ibc_comms_error = rc;
2749 kiblnd_connreq_done(conn, 0);
2753 kiblnd_active_connect (struct rdma_cm_id *cmid)
2755 kib_peer_t *peer = (kib_peer_t *)cmid->context;
2758 struct rdma_conn_param cp;
2761 unsigned long flags;
2764 cfs_read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2766 incarnation = peer->ibp_incarnation;
2767 version = (peer->ibp_version == 0) ? IBLND_MSG_VERSION : peer->ibp_version;
2769 cfs_read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2771 conn = kiblnd_create_conn(peer, cmid, IBLND_CONN_ACTIVE_CONNECT, version);
2773 kiblnd_peer_connect_failed(peer, 1, -ENOMEM);
2774 kiblnd_peer_decref(peer); /* lose cmid's ref */
2778 /* conn "owns" cmid now, so I return success from here on to ensure the
2779 * CM callback doesn't destroy cmid. conn also takes over cmid's ref
2782 msg = &conn->ibc_connvars->cv_msg;
2784 memset(msg, 0, sizeof(*msg));
2785 kiblnd_init_msg(msg, IBLND_MSG_CONNREQ, sizeof(msg->ibm_u.connparams));
2786 msg->ibm_u.connparams.ibcp_queue_depth = IBLND_MSG_QUEUE_SIZE(version);
2787 msg->ibm_u.connparams.ibcp_max_frags = IBLND_RDMA_FRAGS(version);
2788 msg->ibm_u.connparams.ibcp_max_msg_size = IBLND_MSG_SIZE;
2790 kiblnd_pack_msg(peer->ibp_ni, msg, version,
2791 0, peer->ibp_nid, incarnation);
2793 memset(&cp, 0, sizeof(cp));
2794 cp.private_data = msg;
2795 cp.private_data_len = msg->ibm_nob;
2796 cp.responder_resources = 0; /* No atomic ops or RDMA reads */
2797 cp.initiator_depth = 0;
2798 cp.flow_control = 1;
2799 cp.retry_count = *kiblnd_tunables.kib_retry_count;
2800 cp.rnr_retry_count = *kiblnd_tunables.kib_rnr_retry_count;
2802 LASSERT(cmid->context == (void *)conn);
2803 LASSERT(conn->ibc_cmid == cmid);
2805 rc = rdma_connect(cmid, &cp);
2807 CERROR("Can't connect to %s: %d\n",
2808 libcfs_nid2str(peer->ibp_nid), rc);
2809 kiblnd_connreq_done(conn, rc);
2810 kiblnd_conn_decref(conn);
2817 kiblnd_cm_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event)
2823 switch (event->event) {
2825 CERROR("Unexpected event: %d, status: %d\n",
2826 event->event, event->status);
2829 case RDMA_CM_EVENT_CONNECT_REQUEST:
2830 /* destroy cmid on failure */
2831 rc = kiblnd_passive_connect(cmid,
2832 (void *)KIBLND_CONN_PARAM(event),
2833 KIBLND_CONN_PARAM_LEN(event));
2834 CDEBUG(D_NET, "connreq: %d\n", rc);
2837 case RDMA_CM_EVENT_ADDR_ERROR:
2838 peer = (kib_peer_t *)cmid->context;
2839 CNETERR("%s: ADDR ERROR %d\n",
2840 libcfs_nid2str(peer->ibp_nid), event->status);
2841 kiblnd_peer_connect_failed(peer, 1, -EHOSTUNREACH);
2842 kiblnd_peer_decref(peer);
2843 return -EHOSTUNREACH; /* rc != 0 destroys cmid */
2845 case RDMA_CM_EVENT_ADDR_RESOLVED:
2846 peer = (kib_peer_t *)cmid->context;
2848 CDEBUG(D_NET,"%s Addr resolved: %d\n",
2849 libcfs_nid2str(peer->ibp_nid), event->status);
2851 if (event->status != 0) {
2852 CNETERR("Can't resolve address for %s: %d\n",
2853 libcfs_nid2str(peer->ibp_nid), event->status);
2856 rc = rdma_resolve_route(
2857 cmid, *kiblnd_tunables.kib_timeout * 1000);
2860 /* Can't initiate route resolution */
2861 CERROR("Can't resolve route for %s: %d\n",
2862 libcfs_nid2str(peer->ibp_nid), rc);
2864 kiblnd_peer_connect_failed(peer, 1, rc);
2865 kiblnd_peer_decref(peer);
2866 return rc; /* rc != 0 destroys cmid */
2868 case RDMA_CM_EVENT_ROUTE_ERROR:
2869 peer = (kib_peer_t *)cmid->context;
2870 CNETERR("%s: ROUTE ERROR %d\n",
2871 libcfs_nid2str(peer->ibp_nid), event->status);
2872 kiblnd_peer_connect_failed(peer, 1, -EHOSTUNREACH);
2873 kiblnd_peer_decref(peer);
2874 return -EHOSTUNREACH; /* rc != 0 destroys cmid */
2876 case RDMA_CM_EVENT_ROUTE_RESOLVED:
2877 peer = (kib_peer_t *)cmid->context;
2878 CDEBUG(D_NET,"%s Route resolved: %d\n",
2879 libcfs_nid2str(peer->ibp_nid), event->status);
2881 if (event->status == 0)
2882 return kiblnd_active_connect(cmid);
2884 CNETERR("Can't resolve route for %s: %d\n",
2885 libcfs_nid2str(peer->ibp_nid), event->status);
2886 kiblnd_peer_connect_failed(peer, 1, event->status);
2887 kiblnd_peer_decref(peer);
2888 return event->status; /* rc != 0 destroys cmid */
2890 case RDMA_CM_EVENT_UNREACHABLE:
2891 conn = (kib_conn_t *)cmid->context;
2892 LASSERT(conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT ||
2893 conn->ibc_state == IBLND_CONN_PASSIVE_WAIT);
2894 CNETERR("%s: UNREACHABLE %d\n",
2895 libcfs_nid2str(conn->ibc_peer->ibp_nid), event->status);
2896 kiblnd_connreq_done(conn, -ENETDOWN);
2897 kiblnd_conn_decref(conn);
2900 case RDMA_CM_EVENT_CONNECT_ERROR:
2901 conn = (kib_conn_t *)cmid->context;
2902 LASSERT(conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT ||
2903 conn->ibc_state == IBLND_CONN_PASSIVE_WAIT);
2904 CNETERR("%s: CONNECT ERROR %d\n",
2905 libcfs_nid2str(conn->ibc_peer->ibp_nid), event->status);
2906 kiblnd_connreq_done(conn, -ENOTCONN);
2907 kiblnd_conn_decref(conn);
2910 case RDMA_CM_EVENT_REJECTED:
2911 conn = (kib_conn_t *)cmid->context;
2912 switch (conn->ibc_state) {
2916 case IBLND_CONN_PASSIVE_WAIT:
2917 CERROR ("%s: REJECTED %d\n",
2918 libcfs_nid2str(conn->ibc_peer->ibp_nid),
2920 kiblnd_connreq_done(conn, -ECONNRESET);
2923 case IBLND_CONN_ACTIVE_CONNECT:
2924 kiblnd_rejected(conn, event->status,
2925 (void *)KIBLND_CONN_PARAM(event),
2926 KIBLND_CONN_PARAM_LEN(event));
2929 kiblnd_conn_decref(conn);
2932 case RDMA_CM_EVENT_ESTABLISHED:
2933 conn = (kib_conn_t *)cmid->context;
2934 switch (conn->ibc_state) {
2938 case IBLND_CONN_PASSIVE_WAIT:
2939 CDEBUG(D_NET, "ESTABLISHED (passive): %s\n",
2940 libcfs_nid2str(conn->ibc_peer->ibp_nid));
2941 kiblnd_connreq_done(conn, 0);
2944 case IBLND_CONN_ACTIVE_CONNECT:
2945 CDEBUG(D_NET, "ESTABLISHED(active): %s\n",
2946 libcfs_nid2str(conn->ibc_peer->ibp_nid));
2947 kiblnd_check_connreply(conn,
2948 (void *)KIBLND_CONN_PARAM(event),
2949 KIBLND_CONN_PARAM_LEN(event));
2952 /* net keeps its ref on conn! */
2955 #ifdef HAVE_OFED_RDMA_CMEV_TIMEWAIT_EXIT
2956 case RDMA_CM_EVENT_TIMEWAIT_EXIT:
2957 CDEBUG(D_NET, "Ignore TIMEWAIT_EXIT event\n");
2960 case RDMA_CM_EVENT_DISCONNECTED:
2961 conn = (kib_conn_t *)cmid->context;
2962 if (conn->ibc_state < IBLND_CONN_ESTABLISHED) {
2963 CERROR("%s DISCONNECTED\n",
2964 libcfs_nid2str(conn->ibc_peer->ibp_nid));
2965 kiblnd_connreq_done(conn, -ECONNRESET);
2967 kiblnd_close_conn(conn, 0);
2969 kiblnd_conn_decref(conn);
2970 cmid->context = NULL;
2973 case RDMA_CM_EVENT_DEVICE_REMOVAL:
2974 LCONSOLE_ERROR_MSG(0x131,
2975 "Received notification of device removal\n"
2976 "Please shutdown LNET to allow this to proceed\n");
2977 /* Can't remove network from underneath LNET for now, so I have
2981 #ifdef HAVE_OFED_RDMA_CMEV_ADDRCHANGE
2982 case RDMA_CM_EVENT_ADDR_CHANGE:
2983 LCONSOLE_INFO("Physical link changed (eg hca/port)\n");
2990 kiblnd_check_txs_locked(kib_conn_t *conn, cfs_list_t *txs)
2995 cfs_list_for_each (ttmp, txs) {
2996 tx = cfs_list_entry (ttmp, kib_tx_t, tx_list);
2998 if (txs != &conn->ibc_active_txs) {
2999 LASSERT (tx->tx_queued);
3001 LASSERT (!tx->tx_queued);
3002 LASSERT (tx->tx_waiting || tx->tx_sending != 0);
3005 if (cfs_time_aftereq (jiffies, tx->tx_deadline)) {
3006 CERROR("Timed out tx: %s, %lu seconds\n",
3007 kiblnd_queue2str(conn, txs),
3008 cfs_duration_sec(jiffies - tx->tx_deadline));
3017 kiblnd_conn_timed_out_locked(kib_conn_t *conn)
3019 return kiblnd_check_txs_locked(conn, &conn->ibc_tx_queue) ||
3020 kiblnd_check_txs_locked(conn, &conn->ibc_tx_noops) ||
3021 kiblnd_check_txs_locked(conn, &conn->ibc_tx_queue_rsrvd) ||
3022 kiblnd_check_txs_locked(conn, &conn->ibc_tx_queue_nocred) ||
3023 kiblnd_check_txs_locked(conn, &conn->ibc_active_txs);
3027 kiblnd_check_conns (int idx)
3029 CFS_LIST_HEAD (closes);
3030 CFS_LIST_HEAD (checksends);
3031 cfs_list_t *peers = &kiblnd_data.kib_peers[idx];
3036 unsigned long flags;
3038 /* NB. We expect to have a look at all the peers and not find any
3039 * RDMAs to time out, so we just use a shared lock while we
3041 cfs_read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
3043 cfs_list_for_each (ptmp, peers) {
3044 peer = cfs_list_entry (ptmp, kib_peer_t, ibp_list);
3046 cfs_list_for_each (ctmp, &peer->ibp_conns) {
3050 conn = cfs_list_entry(ctmp, kib_conn_t, ibc_list);
3052 LASSERT (conn->ibc_state == IBLND_CONN_ESTABLISHED);
3054 cfs_spin_lock(&conn->ibc_lock);
3056 sendnoop = kiblnd_need_noop(conn);
3057 timedout = kiblnd_conn_timed_out_locked(conn);
3058 if (!sendnoop && !timedout) {
3059 cfs_spin_unlock(&conn->ibc_lock);
3064 CERROR("Timed out RDMA with %s (%lu): "
3065 "c: %u, oc: %u, rc: %u\n",
3066 libcfs_nid2str(peer->ibp_nid),
3067 cfs_duration_sec(cfs_time_current() -
3068 peer->ibp_last_alive),
3070 conn->ibc_outstanding_credits,
3071 conn->ibc_reserved_credits);
3072 cfs_list_add(&conn->ibc_connd_list, &closes);
3074 cfs_list_add(&conn->ibc_connd_list,
3077 /* +ref for 'closes' or 'checksends' */
3078 kiblnd_conn_addref(conn);
3080 cfs_spin_unlock(&conn->ibc_lock);
3084 cfs_read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
3086 /* Handle timeout by closing the whole
3087 * connection. We can only be sure RDMA activity
3088 * has ceased once the QP has been modified. */
3089 while (!cfs_list_empty(&closes)) {
3090 conn = cfs_list_entry(closes.next,
3091 kib_conn_t, ibc_connd_list);
3092 cfs_list_del(&conn->ibc_connd_list);
3093 kiblnd_close_conn(conn, -ETIMEDOUT);
3094 kiblnd_conn_decref(conn);
3097 /* In case we have enough credits to return via a
3098 * NOOP, but there were no non-blocking tx descs
3099 * free to do it last time... */
3100 while (!cfs_list_empty(&checksends)) {
3101 conn = cfs_list_entry(checksends.next,
3102 kib_conn_t, ibc_connd_list);
3103 cfs_list_del(&conn->ibc_connd_list);
3104 kiblnd_check_sends(conn);
3105 kiblnd_conn_decref(conn);
3110 kiblnd_disconnect_conn (kib_conn_t *conn)
3112 LASSERT (!cfs_in_interrupt());
3113 LASSERT (current == kiblnd_data.kib_connd);
3114 LASSERT (conn->ibc_state == IBLND_CONN_CLOSING);
3116 rdma_disconnect(conn->ibc_cmid);
3117 kiblnd_finalise_conn(conn);
3119 kiblnd_peer_notify(conn->ibc_peer);
3123 kiblnd_connd (void *arg)
3125 cfs_waitlink_t wait;
3126 unsigned long flags;
3132 unsigned long deadline = jiffies;
3134 cfs_daemonize ("kiblnd_connd");
3135 cfs_block_allsigs ();
3137 cfs_waitlink_init (&wait);
3138 kiblnd_data.kib_connd = current;
3140 cfs_spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags);
3142 while (!kiblnd_data.kib_shutdown) {
3146 if (!cfs_list_empty (&kiblnd_data.kib_connd_zombies)) {
3147 conn = cfs_list_entry(kiblnd_data. \
3148 kib_connd_zombies.next,
3149 kib_conn_t, ibc_list);
3150 cfs_list_del(&conn->ibc_list);
3152 cfs_spin_unlock_irqrestore (&kiblnd_data.kib_connd_lock,
3156 kiblnd_destroy_conn(conn);
3158 cfs_spin_lock_irqsave (&kiblnd_data.kib_connd_lock,
3162 if (!cfs_list_empty (&kiblnd_data.kib_connd_conns)) {
3163 conn = cfs_list_entry (kiblnd_data.kib_connd_conns.next,
3164 kib_conn_t, ibc_list);
3165 cfs_list_del(&conn->ibc_list);
3167 cfs_spin_unlock_irqrestore (&kiblnd_data.kib_connd_lock,
3171 kiblnd_disconnect_conn(conn);
3172 kiblnd_conn_decref(conn);
3174 cfs_spin_lock_irqsave (&kiblnd_data.kib_connd_lock,
3178 /* careful with the jiffy wrap... */
3179 timeout = (int)(deadline - jiffies);
3183 int chunk = kiblnd_data.kib_peer_hash_size;
3185 cfs_spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags);
3188 /* Time to check for RDMA timeouts on a few more
3189 * peers: I do checks every 'p' seconds on a
3190 * proportion of the peer table and I need to check
3191 * every connection 'n' times within a timeout
3192 * interval, to ensure I detect a timeout on any
3193 * connection within (n+1)/n times the timeout
3196 if (*kiblnd_tunables.kib_timeout > n * p)
3197 chunk = (chunk * n * p) /
3198 *kiblnd_tunables.kib_timeout;
3202 for (i = 0; i < chunk; i++) {
3203 kiblnd_check_conns(peer_index);
3204 peer_index = (peer_index + 1) %
3205 kiblnd_data.kib_peer_hash_size;
3208 deadline += p * CFS_HZ;
3209 cfs_spin_lock_irqsave(&kiblnd_data.kib_connd_lock,
3216 /* Nothing to do for 'timeout' */
3217 cfs_set_current_state (CFS_TASK_INTERRUPTIBLE);
3218 cfs_waitq_add (&kiblnd_data.kib_connd_waitq, &wait);
3219 cfs_spin_unlock_irqrestore (&kiblnd_data.kib_connd_lock, flags);
3221 cfs_waitq_timedwait(&wait, CFS_TASK_INTERRUPTIBLE, timeout);
3223 cfs_set_current_state (CFS_TASK_RUNNING);
3224 cfs_waitq_del (&kiblnd_data.kib_connd_waitq, &wait);
3225 cfs_spin_lock_irqsave (&kiblnd_data.kib_connd_lock, flags);
3228 cfs_spin_unlock_irqrestore (&kiblnd_data.kib_connd_lock, flags);
3230 kiblnd_thread_fini();
3235 kiblnd_qp_event(struct ib_event *event, void *arg)
3237 kib_conn_t *conn = arg;
3239 switch (event->event) {
3240 case IB_EVENT_COMM_EST:
3241 CDEBUG(D_NET, "%s established\n",
3242 libcfs_nid2str(conn->ibc_peer->ibp_nid));
3246 CERROR("%s: Async QP event type %d\n",
3247 libcfs_nid2str(conn->ibc_peer->ibp_nid), event->event);
3253 kiblnd_complete (struct ib_wc *wc)
3255 switch (kiblnd_wreqid2type(wc->wr_id)) {
3259 case IBLND_WID_RDMA:
3260 /* We only get RDMA completion notification if it fails. All
3261 * subsequent work items, including the final SEND will fail
3262 * too. However we can't print out any more info about the
3263 * failing RDMA because 'tx' might be back on the idle list or
3264 * even reused already if we didn't manage to post all our work
3266 CNETERR("RDMA (tx: %p) failed: %d\n",
3267 kiblnd_wreqid2ptr(wc->wr_id), wc->status);
3271 kiblnd_tx_complete(kiblnd_wreqid2ptr(wc->wr_id), wc->status);
3275 kiblnd_rx_complete(kiblnd_wreqid2ptr(wc->wr_id), wc->status,
3282 kiblnd_cq_completion(struct ib_cq *cq, void *arg)
3284 /* NB I'm not allowed to schedule this conn once its refcount has
3285 * reached 0. Since fundamentally I'm racing with scheduler threads
3286 * consuming my CQ I could be called after all completions have
3287 * occurred. But in this case, ibc_nrx == 0 && ibc_nsends_posted == 0
3288 * and this CQ is about to be destroyed so I NOOP. */
3289 kib_conn_t *conn = (kib_conn_t *)arg;
3290 struct kib_sched_info *sched = conn->ibc_sched;
3291 unsigned long flags;
3293 LASSERT(cq == conn->ibc_cq);
3295 cfs_spin_lock_irqsave(&sched->ibs_lock, flags);
3297 conn->ibc_ready = 1;
3299 if (!conn->ibc_scheduled &&
3300 (conn->ibc_nrx > 0 ||
3301 conn->ibc_nsends_posted > 0)) {
3302 kiblnd_conn_addref(conn); /* +1 ref for sched_conns */
3303 conn->ibc_scheduled = 1;
3304 cfs_list_add_tail(&conn->ibc_sched_list, &sched->ibs_conns);
3306 if (cfs_waitq_active(&sched->ibs_waitq))
3307 cfs_waitq_signal(&sched->ibs_waitq);
3310 cfs_spin_unlock_irqrestore(&sched->ibs_lock, flags);
3314 kiblnd_cq_event(struct ib_event *event, void *arg)
3316 kib_conn_t *conn = arg;
3318 CERROR("%s: async CQ event type %d\n",
3319 libcfs_nid2str(conn->ibc_peer->ibp_nid), event->event);
3323 kiblnd_scheduler(void *arg)
3325 long id = (long)arg;
3326 struct kib_sched_info *sched;
3328 cfs_waitlink_t wait;
3329 unsigned long flags;
3336 snprintf(name, sizeof(name), "kiblnd_sd_%02ld_%02ld",
3337 KIB_THREAD_CPT(id), KIB_THREAD_TID(id));
3339 cfs_daemonize(name);
3340 cfs_block_allsigs();
3342 cfs_waitlink_init(&wait);
3344 sched = kiblnd_data.kib_scheds[KIB_THREAD_CPT(id)];
3346 rc = cfs_cpt_bind(lnet_cpt_table(), sched->ibs_cpt);
3348 CWARN("Failed to bind %s on CPT %d, please verify whether "
3349 "all CPUs are healthy and reload modules if necessary, "
3350 "otherwise your system might under risk of low "
3351 "performance\n", name, sched->ibs_cpt);
3354 cfs_spin_lock_irqsave(&sched->ibs_lock, flags);
3356 while (!kiblnd_data.kib_shutdown) {
3357 if (busy_loops++ >= IBLND_RESCHED) {
3358 cfs_spin_unlock_irqrestore(&sched->ibs_lock, flags);
3363 cfs_spin_lock_irqsave(&sched->ibs_lock, flags);
3368 if (!cfs_list_empty(&sched->ibs_conns)) {
3369 conn = cfs_list_entry(sched->ibs_conns.next,
3370 kib_conn_t, ibc_sched_list);
3371 /* take over kib_sched_conns' ref on conn... */
3372 LASSERT(conn->ibc_scheduled);
3373 cfs_list_del(&conn->ibc_sched_list);
3374 conn->ibc_ready = 0;
3376 cfs_spin_unlock_irqrestore(&sched->ibs_lock, flags);
3378 rc = ib_poll_cq(conn->ibc_cq, 1, &wc);
3380 rc = ib_req_notify_cq(conn->ibc_cq,
3383 CWARN("%s: ib_req_notify_cq failed: %d, "
3384 "closing connection\n",
3385 libcfs_nid2str(conn->ibc_peer->ibp_nid), rc);
3386 kiblnd_close_conn(conn, -EIO);
3387 kiblnd_conn_decref(conn);
3388 cfs_spin_lock_irqsave(&sched->ibs_lock,
3393 rc = ib_poll_cq(conn->ibc_cq, 1, &wc);
3397 CWARN("%s: ib_poll_cq failed: %d, "
3398 "closing connection\n",
3399 libcfs_nid2str(conn->ibc_peer->ibp_nid),
3401 kiblnd_close_conn(conn, -EIO);
3402 kiblnd_conn_decref(conn);
3403 cfs_spin_lock_irqsave(&sched->ibs_lock, flags);
3407 cfs_spin_lock_irqsave(&sched->ibs_lock, flags);
3409 if (rc != 0 || conn->ibc_ready) {
3410 /* There may be another completion waiting; get
3411 * another scheduler to check while I handle
3413 /* +1 ref for sched_conns */
3414 kiblnd_conn_addref(conn);
3415 cfs_list_add_tail(&conn->ibc_sched_list,
3417 if (cfs_waitq_active(&sched->ibs_waitq))
3418 cfs_waitq_signal(&sched->ibs_waitq);
3420 conn->ibc_scheduled = 0;
3424 cfs_spin_unlock_irqrestore(&sched->ibs_lock,
3426 kiblnd_complete(&wc);
3428 cfs_spin_lock_irqsave(&sched->ibs_lock, flags);
3431 kiblnd_conn_decref(conn); /* ...drop my ref from above */
3438 cfs_set_current_state(CFS_TASK_INTERRUPTIBLE);
3439 cfs_waitq_add_exclusive(&sched->ibs_waitq, &wait);
3440 cfs_spin_unlock_irqrestore(&sched->ibs_lock, flags);
3442 cfs_waitq_wait(&wait, CFS_TASK_INTERRUPTIBLE);
3445 cfs_waitq_del(&sched->ibs_waitq, &wait);
3446 cfs_set_current_state(CFS_TASK_RUNNING);
3447 cfs_spin_lock_irqsave(&sched->ibs_lock, flags);
3450 cfs_spin_unlock_irqrestore(&sched->ibs_lock, flags);
3452 kiblnd_thread_fini();
3457 kiblnd_failover_thread(void *arg)
3459 cfs_rwlock_t *glock = &kiblnd_data.kib_global_lock;
3461 cfs_waitlink_t wait;
3462 unsigned long flags;
3465 LASSERT (*kiblnd_tunables.kib_dev_failover != 0);
3467 cfs_daemonize ("kiblnd_failover");
3468 cfs_block_allsigs ();
3470 cfs_waitlink_init(&wait);
3471 cfs_write_lock_irqsave(glock, flags);
3473 while (!kiblnd_data.kib_shutdown) {
3474 int do_failover = 0;
3477 cfs_list_for_each_entry(dev, &kiblnd_data.kib_failed_devs,
3479 if (cfs_time_before(cfs_time_current(),
3480 dev->ibd_next_failover))
3487 cfs_list_del_init(&dev->ibd_fail_list);
3488 dev->ibd_failover = 1;
3489 cfs_write_unlock_irqrestore(glock, flags);
3491 rc = kiblnd_dev_failover(dev);
3493 cfs_write_lock_irqsave(glock, flags);
3495 LASSERT (dev->ibd_failover);
3496 dev->ibd_failover = 0;
3497 if (rc >= 0) { /* Device is OK or failover succeed */
3498 dev->ibd_next_failover = cfs_time_shift(3);
3502 /* failed to failover, retry later */
3503 dev->ibd_next_failover =
3504 cfs_time_shift(min(dev->ibd_failed_failover, 10));
3505 if (kiblnd_dev_can_failover(dev)) {
3506 cfs_list_add_tail(&dev->ibd_fail_list,
3507 &kiblnd_data.kib_failed_devs);
3513 /* long sleep if no more pending failover */
3514 long_sleep = cfs_list_empty(&kiblnd_data.kib_failed_devs);
3516 cfs_set_current_state(CFS_TASK_INTERRUPTIBLE);
3517 cfs_waitq_add(&kiblnd_data.kib_failover_waitq, &wait);
3518 cfs_write_unlock_irqrestore(glock, flags);
3520 rc = schedule_timeout(long_sleep ? cfs_time_seconds(10) :
3521 cfs_time_seconds(1));
3522 cfs_set_current_state(CFS_TASK_RUNNING);
3523 cfs_waitq_del(&kiblnd_data.kib_failover_waitq, &wait);
3524 cfs_write_lock_irqsave(glock, flags);
3526 if (!long_sleep || rc != 0)
3529 /* have a long sleep, routine check all active devices,
3530 * we need checking like this because if there is not active
3531 * connection on the dev and no SEND from local, we may listen
3532 * on wrong HCA for ever while there is a bonding failover */
3533 cfs_list_for_each_entry(dev, &kiblnd_data.kib_devs, ibd_list) {
3534 if (kiblnd_dev_can_failover(dev)) {
3535 cfs_list_add_tail(&dev->ibd_fail_list,
3536 &kiblnd_data.kib_failed_devs);
3541 cfs_write_unlock_irqrestore(glock, flags);
3543 kiblnd_thread_fini();