1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lnet/klnds/viblnd/viblnd_cb.c
38 * Author: Eric Barton <eric@bartonsoftware.com>
39 * Author: Frank Zago <fzago@systemfabricworks.com>
45 kibnal_tx_done (kib_tx_t *tx)
47 lnet_msg_t *lntmsg[2];
48 int rc = tx->tx_status;
51 LASSERT (!in_interrupt());
52 LASSERT (!tx->tx_queued); /* mustn't be queued for sending */
53 LASSERT (tx->tx_sending == 0); /* mustn't be awaiting sent callback */
54 LASSERT (!tx->tx_waiting); /* mustn't be awaiting peer response */
57 if (tx->tx_md.md_fmrcount == 0 ||
58 (rc != 0 && tx->tx_md.md_active)) {
61 /* mapping must be active (it dropped fmrcount to 0) */
62 LASSERT (tx->tx_md.md_active);
64 vvrc = vv_unmap_fmr(kibnal_data.kib_hca,
65 1, &tx->tx_md.md_fmrhandle);
66 LASSERT (vvrc == vv_return_ok);
68 tx->tx_md.md_fmrcount = *kibnal_tunables.kib_fmr_remaps;
70 tx->tx_md.md_active = 0;
73 /* tx may have up to 2 lnet msgs to finalise */
74 lntmsg[0] = tx->tx_lntmsg[0]; tx->tx_lntmsg[0] = NULL;
75 lntmsg[1] = tx->tx_lntmsg[1]; tx->tx_lntmsg[1] = NULL;
77 if (tx->tx_conn != NULL) {
78 kibnal_conn_decref(tx->tx_conn);
85 spin_lock(&kibnal_data.kib_tx_lock);
87 list_add (&tx->tx_list, &kibnal_data.kib_idle_txs);
89 spin_unlock(&kibnal_data.kib_tx_lock);
91 /* delay finalize until my descs have been freed */
92 for (i = 0; i < 2; i++) {
93 if (lntmsg[i] == NULL)
96 lnet_finalize (kibnal_data.kib_ni, lntmsg[i], rc);
101 kibnal_txlist_done (struct list_head *txlist, int status)
105 while (!list_empty (txlist)) {
106 tx = list_entry (txlist->next, kib_tx_t, tx_list);
108 list_del (&tx->tx_list);
111 tx->tx_status = status;
117 kibnal_get_idle_tx (void)
121 spin_lock(&kibnal_data.kib_tx_lock);
123 if (list_empty (&kibnal_data.kib_idle_txs)) {
124 spin_unlock(&kibnal_data.kib_tx_lock);
128 tx = list_entry (kibnal_data.kib_idle_txs.next, kib_tx_t, tx_list);
129 list_del (&tx->tx_list);
131 /* Allocate a new completion cookie. It might not be needed,
132 * but we've got a lock right now and we're unlikely to
134 tx->tx_cookie = kibnal_data.kib_next_tx_cookie++;
136 spin_unlock(&kibnal_data.kib_tx_lock);
138 LASSERT (tx->tx_nwrq == 0);
139 LASSERT (!tx->tx_queued);
140 LASSERT (tx->tx_sending == 0);
141 LASSERT (!tx->tx_waiting);
142 LASSERT (tx->tx_status == 0);
143 LASSERT (tx->tx_conn == NULL);
144 LASSERT (tx->tx_lntmsg[0] == NULL);
145 LASSERT (tx->tx_lntmsg[1] == NULL);
151 kibnal_post_rx (kib_rx_t *rx, int credit, int rsrvd_credit)
153 kib_conn_t *conn = rx->rx_conn;
155 __u64 addr = (__u64)((unsigned long)((rx)->rx_msg));
158 LASSERT (!in_interrupt());
159 /* old peers don't reserve rxs for RDMA replies */
160 LASSERT (!rsrvd_credit ||
161 conn->ibc_version != IBNAL_MSG_VERSION_RDMAREPLYNOTRSRVD);
163 rx->rx_gl = (vv_scatgat_t) {
164 .v_address = KIBNAL_ADDR2SG(addr),
165 .l_key = rx->rx_lkey,
166 .length = IBNAL_MSG_SIZE,
169 rx->rx_wrq = (vv_wr_t) {
170 .wr_id = kibnal_ptr2wreqid(rx, IBNAL_WID_RX),
171 .completion_notification = 1,
172 .scatgat_list = &rx->rx_gl,
173 .num_of_data_segments = 1,
174 .wr_type = vv_wr_receive,
177 LASSERT (conn->ibc_state >= IBNAL_CONN_INIT);
178 LASSERT (rx->rx_nob >= 0); /* not posted */
180 CDEBUG(D_NET, "posting rx [%d %x "LPX64"]\n",
181 rx->rx_wrq.scatgat_list->length,
182 rx->rx_wrq.scatgat_list->l_key,
183 KIBNAL_SG2ADDR(rx->rx_wrq.scatgat_list->v_address));
185 if (conn->ibc_state > IBNAL_CONN_ESTABLISHED) {
186 /* No more posts for this rx; so lose its ref */
187 kibnal_conn_decref(conn);
191 rx->rx_nob = -1; /* flag posted */
193 spin_lock(&conn->ibc_lock);
194 /* Serialise vv_post_receive; it's not re-entrant on the same QP */
195 vvrc = vv_post_receive(kibnal_data.kib_hca,
196 conn->ibc_qp, &rx->rx_wrq);
198 if (vvrc == vv_return_ok) {
200 conn->ibc_outstanding_credits++;
202 conn->ibc_reserved_credits++;
204 spin_unlock(&conn->ibc_lock);
206 if (credit || rsrvd_credit)
207 kibnal_check_sends(conn);
212 spin_unlock(&conn->ibc_lock);
214 CERROR ("post rx -> %s failed %d\n",
215 libcfs_nid2str(conn->ibc_peer->ibp_nid), vvrc);
217 kibnal_close_conn(conn, rc);
218 /* No more posts for this rx; so lose its ref */
219 kibnal_conn_decref(conn);
224 kibnal_post_receives (kib_conn_t *conn)
229 LASSERT (conn->ibc_state < IBNAL_CONN_ESTABLISHED);
230 LASSERT (conn->ibc_comms_error == 0);
232 for (i = 0; i < IBNAL_RX_MSGS; i++) {
233 /* +1 ref for rx desc. This ref remains until kibnal_post_rx
234 * fails (i.e. actual failure or we're disconnecting) */
235 kibnal_conn_addref(conn);
236 rc = kibnal_post_rx (&conn->ibc_rxs[i], 0, 0);
245 kibnal_find_waiting_tx_locked(kib_conn_t *conn, int txtype, __u64 cookie)
247 struct list_head *tmp;
249 list_for_each(tmp, &conn->ibc_active_txs) {
250 kib_tx_t *tx = list_entry(tmp, kib_tx_t, tx_list);
252 LASSERT (!tx->tx_queued);
253 LASSERT (tx->tx_sending != 0 || tx->tx_waiting);
255 if (tx->tx_cookie != cookie)
258 if (tx->tx_waiting &&
259 tx->tx_msg->ibm_type == txtype)
262 CWARN("Bad completion: %swaiting, type %x (wanted %x)\n",
263 tx->tx_waiting ? "" : "NOT ",
264 tx->tx_msg->ibm_type, txtype);
270 kibnal_handle_completion(kib_conn_t *conn, int txtype, int status, __u64 cookie)
275 spin_lock(&conn->ibc_lock);
277 tx = kibnal_find_waiting_tx_locked(conn, txtype, cookie);
279 spin_unlock(&conn->ibc_lock);
281 CWARN("Unmatched completion type %x cookie "LPX64" from %s\n",
282 txtype, cookie, libcfs_nid2str(conn->ibc_peer->ibp_nid));
283 kibnal_close_conn (conn, -EPROTO);
287 if (tx->tx_status == 0) { /* success so far */
288 if (status < 0) { /* failed? */
289 tx->tx_status = status;
290 } else if (txtype == IBNAL_MSG_GET_REQ) {
291 lnet_set_reply_msg_len(kibnal_data.kib_ni,
292 tx->tx_lntmsg[1], status);
298 idle = !tx->tx_queued && (tx->tx_sending == 0);
300 list_del(&tx->tx_list);
302 spin_unlock(&conn->ibc_lock);
309 kibnal_send_completion (kib_conn_t *conn, int type, int status, __u64 cookie)
311 kib_tx_t *tx = kibnal_get_idle_tx();
314 CERROR("Can't get tx for completion %x for %s\n",
315 type, libcfs_nid2str(conn->ibc_peer->ibp_nid));
319 tx->tx_msg->ibm_u.completion.ibcm_status = status;
320 tx->tx_msg->ibm_u.completion.ibcm_cookie = cookie;
321 kibnal_init_tx_msg(tx, type, sizeof(kib_completion_msg_t));
323 kibnal_queue_tx(tx, conn);
327 kibnal_handle_rx (kib_rx_t *rx)
329 kib_msg_t *msg = rx->rx_msg;
330 kib_conn_t *conn = rx->rx_conn;
331 int credits = msg->ibm_credits;
335 int rsrvd_credit = 0;
338 LASSERT (conn->ibc_state >= IBNAL_CONN_ESTABLISHED);
340 CDEBUG (D_NET, "Received %x[%d] from %s\n",
341 msg->ibm_type, credits, libcfs_nid2str(conn->ibc_peer->ibp_nid));
344 /* Have I received credits that will let me send? */
345 spin_lock(&conn->ibc_lock);
346 conn->ibc_credits += credits;
347 spin_unlock(&conn->ibc_lock);
349 kibnal_check_sends(conn);
352 switch (msg->ibm_type) {
354 CERROR("Bad IBNAL message type %x from %s\n",
355 msg->ibm_type, libcfs_nid2str(conn->ibc_peer->ibp_nid));
362 case IBNAL_MSG_IMMEDIATE:
363 rc = lnet_parse(kibnal_data.kib_ni, &msg->ibm_u.immediate.ibim_hdr,
364 msg->ibm_srcnid, rx, 0);
365 repost = rc < 0; /* repost on error */
368 case IBNAL_MSG_PUT_REQ:
369 rc = lnet_parse(kibnal_data.kib_ni, &msg->ibm_u.putreq.ibprm_hdr,
370 msg->ibm_srcnid, rx, 1);
371 repost = rc < 0; /* repost on error */
374 case IBNAL_MSG_PUT_NAK:
375 rsrvd_credit = 1; /* rdma reply (was pre-reserved) */
377 CWARN ("PUT_NACK from %s\n", libcfs_nid2str(conn->ibc_peer->ibp_nid));
378 kibnal_handle_completion(conn, IBNAL_MSG_PUT_REQ,
379 msg->ibm_u.completion.ibcm_status,
380 msg->ibm_u.completion.ibcm_cookie);
383 case IBNAL_MSG_PUT_ACK:
384 rsrvd_credit = 1; /* rdma reply (was pre-reserved) */
386 spin_lock(&conn->ibc_lock);
387 tx = kibnal_find_waiting_tx_locked(conn, IBNAL_MSG_PUT_REQ,
388 msg->ibm_u.putack.ibpam_src_cookie);
390 list_del(&tx->tx_list);
391 spin_unlock(&conn->ibc_lock);
394 CERROR("Unmatched PUT_ACK from %s\n",
395 libcfs_nid2str(conn->ibc_peer->ibp_nid));
400 LASSERT (tx->tx_waiting);
401 /* CAVEAT EMPTOR: I could be racing with tx_complete, but...
402 * (a) I can overwrite tx_msg since my peer has received it!
403 * (b) tx_waiting set tells tx_complete() it's not done. */
405 tx->tx_nwrq = 0; /* overwrite PUT_REQ */
407 rc2 = kibnal_init_rdma(tx, IBNAL_MSG_PUT_DONE,
408 kibnal_rd_size(&msg->ibm_u.putack.ibpam_rd),
409 &msg->ibm_u.putack.ibpam_rd,
410 msg->ibm_u.putack.ibpam_dst_cookie);
412 CERROR("Can't setup rdma for PUT to %s: %d\n",
413 libcfs_nid2str(conn->ibc_peer->ibp_nid), rc2);
415 spin_lock(&conn->ibc_lock);
416 if (tx->tx_status == 0 && rc2 < 0)
418 tx->tx_waiting = 0; /* clear waiting and queue atomically */
419 kibnal_queue_tx_locked(tx, conn);
420 spin_unlock(&conn->ibc_lock);
423 case IBNAL_MSG_PUT_DONE:
424 /* This buffer was pre-reserved by not returning the credit
425 * when the PUT_REQ's buffer was reposted, so I just return it
427 kibnal_handle_completion(conn, IBNAL_MSG_PUT_ACK,
428 msg->ibm_u.completion.ibcm_status,
429 msg->ibm_u.completion.ibcm_cookie);
432 case IBNAL_MSG_GET_REQ:
433 rc = lnet_parse(kibnal_data.kib_ni, &msg->ibm_u.get.ibgm_hdr,
434 msg->ibm_srcnid, rx, 1);
435 repost = rc < 0; /* repost on error */
438 case IBNAL_MSG_GET_DONE:
439 rsrvd_credit = 1; /* rdma reply (was pre-reserved) */
441 kibnal_handle_completion(conn, IBNAL_MSG_GET_REQ,
442 msg->ibm_u.completion.ibcm_status,
443 msg->ibm_u.completion.ibcm_cookie);
447 if (rc < 0) /* protocol error */
448 kibnal_close_conn(conn, rc);
451 if (conn->ibc_version == IBNAL_MSG_VERSION_RDMAREPLYNOTRSRVD)
452 rsrvd_credit = 0; /* peer isn't pre-reserving */
454 kibnal_post_rx(rx, !rsrvd_credit, rsrvd_credit);
459 kibnal_rx_complete (kib_rx_t *rx, vv_comp_status_t vvrc, int nob, __u64 rxseq)
461 kib_msg_t *msg = rx->rx_msg;
462 kib_conn_t *conn = rx->rx_conn;
466 CDEBUG(D_NET, "rx %p conn %p\n", rx, conn);
467 LASSERT (rx->rx_nob < 0); /* was posted */
468 rx->rx_nob = 0; /* isn't now */
470 if (conn->ibc_state > IBNAL_CONN_ESTABLISHED)
473 if (vvrc != vv_comp_status_success) {
474 CERROR("Rx from %s failed: %d\n",
475 libcfs_nid2str(conn->ibc_peer->ibp_nid), vvrc);
479 rc = kibnal_unpack_msg(msg, conn->ibc_version, nob);
481 CERROR ("Error %d unpacking rx from %s\n",
482 rc, libcfs_nid2str(conn->ibc_peer->ibp_nid));
486 rx->rx_nob = nob; /* Can trust 'nob' now */
488 if (conn->ibc_peer->ibp_nid != msg->ibm_srcnid ||
489 kibnal_data.kib_ni->ni_nid != msg->ibm_dstnid ||
490 msg->ibm_srcstamp != conn->ibc_incarnation ||
491 msg->ibm_dststamp != kibnal_data.kib_incarnation) {
492 CERROR ("Stale rx from %s\n",
493 libcfs_nid2str(conn->ibc_peer->ibp_nid));
497 if (msg->ibm_seq != rxseq) {
498 CERROR ("Out-of-sequence rx from %s"
499 ": got "LPD64" but expected "LPD64"\n",
500 libcfs_nid2str(conn->ibc_peer->ibp_nid),
501 msg->ibm_seq, rxseq);
505 /* set time last known alive */
506 kibnal_peer_alive(conn->ibc_peer);
508 /* racing with connection establishment/teardown! */
510 if (conn->ibc_state < IBNAL_CONN_ESTABLISHED) {
511 write_lock_irqsave(&kibnal_data.kib_global_lock, flags);
512 /* must check holding global lock to eliminate race */
513 if (conn->ibc_state < IBNAL_CONN_ESTABLISHED) {
514 list_add_tail(&rx->rx_list, &conn->ibc_early_rxs);
515 write_unlock_irqrestore(&kibnal_data.kib_global_lock,
519 write_unlock_irqrestore(&kibnal_data.kib_global_lock,
522 kibnal_handle_rx(rx);
526 CDEBUG(D_NET, "rx %p conn %p\n", rx, conn);
527 kibnal_close_conn(conn, -EIO);
529 /* Don't re-post rx & drop its ref on conn */
530 kibnal_conn_decref(conn);
534 kibnal_kvaddr_to_page (unsigned long vaddr)
538 if (vaddr >= VMALLOC_START &&
539 vaddr < VMALLOC_END) {
540 page = vmalloc_to_page ((void *)vaddr);
541 LASSERT (page != NULL);
544 #ifdef CONFIG_HIGHMEM
545 if (vaddr >= PKMAP_BASE &&
546 vaddr < (PKMAP_BASE + LAST_PKMAP * PAGE_SIZE)) {
547 /* No highmem pages only used for bulk (kiov) I/O */
548 CERROR("find page for address in highmem\n");
552 page = virt_to_page (vaddr);
553 LASSERT (page != NULL);
559 kibnal_append_rdfrag(kib_rdma_desc_t *rd, int active, struct page *page,
560 unsigned long page_offset, unsigned long len)
562 kib_rdma_frag_t *frag = &rd->rd_frags[rd->rd_nfrag];
567 vv_mem_reg_h_t mem_h;
570 if (rd->rd_nfrag >= IBNAL_MAX_RDMA_FRAGS) {
571 CERROR ("Too many RDMA fragments\n");
575 /* Try to create an address that adaptor-tavor will munge into a valid
576 * network address, given how it maps all phys mem into 1 region */
577 addr = lnet_page2phys(page) + page_offset + PAGE_OFFSET;
579 /* NB this relies entirely on there being a single region for the whole
580 * of memory, since "high" memory will wrap in the (void *) cast! */
581 vvrc = vv_get_gen_mr_attrib(kibnal_data.kib_hca,
582 (void *)((unsigned long)addr),
583 len, &mem_h, &l_key, &r_key);
584 LASSERT (vvrc == vv_return_ok);
587 if (rd->rd_nfrag == 0) {
589 } else if (l_key != rd->rd_key) {
590 CERROR ("> 1 key for single RDMA desc\n");
595 if (rd->rd_nfrag == 0) {
597 } else if (r_key != rd->rd_key) {
598 CERROR ("> 1 key for single RDMA desc\n");
602 frag_addr = kibnal_addr2net(addr);
605 kibnal_rf_set(frag, frag_addr, len);
607 CDEBUG(D_NET,"map frag [%d][%d %x %08x%08x] "LPX64"\n",
608 rd->rd_nfrag, frag->rf_nob, rd->rd_key,
609 frag->rf_addr_hi, frag->rf_addr_lo, frag_addr);
616 kibnal_setup_rd_iov(kib_tx_t *tx, kib_rdma_desc_t *rd,
617 vv_access_con_bit_mask_t access,
618 unsigned int niov, struct iovec *iov, int offset, int nob)
620 /* active if I'm sending */
621 int active = ((access & vv_acc_r_mem_write) == 0);
630 LASSERT ((rd != tx->tx_rd) == !active);
632 while (offset >= iov->iov_len) {
633 offset -= iov->iov_len;
643 vaddr = ((unsigned long)iov->iov_base) + offset;
644 page_offset = vaddr & (PAGE_SIZE - 1);
645 page = kibnal_kvaddr_to_page(vaddr);
647 CERROR ("Can't find page\n");
651 fragnob = min((int)(iov->iov_len - offset), nob);
652 fragnob = min(fragnob, (int)PAGE_SIZE - page_offset);
654 rc = kibnal_append_rdfrag(rd, active, page,
655 page_offset, fragnob);
659 if (offset + fragnob < iov->iov_len) {
673 kibnal_setup_rd_kiov (kib_tx_t *tx, kib_rdma_desc_t *rd,
674 vv_access_con_bit_mask_t access,
675 int nkiov, lnet_kiov_t *kiov, int offset, int nob)
677 /* active if I'm sending */
678 int active = ((access & vv_acc_r_mem_write) == 0);
682 CDEBUG(D_NET, "niov %d offset %d nob %d\n", nkiov, offset, nob);
686 LASSERT ((rd != tx->tx_rd) == !active);
688 while (offset >= kiov->kiov_len) {
689 offset -= kiov->kiov_len;
698 fragnob = min((int)(kiov->kiov_len - offset), nob);
700 rc = kibnal_append_rdfrag(rd, active, kiov->kiov_page,
701 kiov->kiov_offset + offset,
716 kibnal_map_tx (kib_tx_t *tx, kib_rdma_desc_t *rd, int active,
717 int npages, unsigned long page_offset, int nob)
720 vv_fmr_map_t map_props;
722 LASSERT ((rd != tx->tx_rd) == !active);
723 LASSERT (!tx->tx_md.md_active);
724 LASSERT (tx->tx_md.md_fmrcount > 0);
725 LASSERT (page_offset < PAGE_SIZE);
726 LASSERT (npages >= (1 + ((page_offset + nob - 1)>>PAGE_SHIFT)));
727 LASSERT (npages <= LNET_MAX_IOV);
729 memset(&map_props, 0, sizeof(map_props));
731 map_props.start = (void *)page_offset;
732 map_props.size = nob;
733 map_props.page_array_len = npages;
734 map_props.page_array = tx->tx_pages;
736 vvrc = vv_map_fmr(kibnal_data.kib_hca, tx->tx_md.md_fmrhandle,
737 &map_props, &tx->tx_md.md_lkey, &tx->tx_md.md_rkey);
738 if (vvrc != vv_return_ok) {
739 CERROR ("Can't map vaddr %p for %d in %d pages: %d\n",
740 map_props.start, nob, npages, vvrc);
744 tx->tx_md.md_addr = (unsigned long)map_props.start;
745 tx->tx_md.md_active = 1;
746 tx->tx_md.md_fmrcount--;
748 rd->rd_key = active ? tx->tx_md.md_lkey : tx->tx_md.md_rkey;
750 rd->rd_addr = tx->tx_md.md_addr;
752 /* Compensate for adaptor-tavor's munging of gatherlist addresses */
754 rd->rd_addr += PAGE_OFFSET;
760 kibnal_setup_rd_iov (kib_tx_t *tx, kib_rdma_desc_t *rd,
761 vv_access_con_bit_mask_t access,
762 unsigned int niov, struct iovec *iov, int offset, int nob)
764 /* active if I'm sending */
765 int active = ((access & vv_acc_r_mem_write) == 0);
770 unsigned long page_offset;
776 while (offset >= iov->iov_len) {
777 offset -= iov->iov_len;
783 if (nob > iov->iov_len - offset) {
784 CERROR ("Can't map multiple vaddr fragments\n");
788 vaddr = ((unsigned long)iov->iov_base) + offset;
790 page_offset = vaddr & (PAGE_SIZE - 1);
795 LASSERT (npages < LNET_MAX_IOV);
797 page = kibnal_kvaddr_to_page(vaddr);
799 CERROR("Can't find page for %lu\n", vaddr);
803 tx->tx_pages[npages++] = lnet_page2phys(page);
805 fragnob = PAGE_SIZE - (vaddr & (PAGE_SIZE - 1));
811 return kibnal_map_tx(tx, rd, active, npages, page_offset, nob);
815 kibnal_setup_rd_kiov (kib_tx_t *tx, kib_rdma_desc_t *rd,
816 vv_access_con_bit_mask_t access,
817 int nkiov, lnet_kiov_t *kiov, int offset, int nob)
819 /* active if I'm sending */
820 int active = ((access & vv_acc_r_mem_write) == 0);
823 unsigned long page_offset;
825 CDEBUG(D_NET, "niov %d offset %d nob %d\n", nkiov, offset, nob);
829 LASSERT (nkiov <= LNET_MAX_IOV);
830 LASSERT (!tx->tx_md.md_active);
831 LASSERT ((rd != tx->tx_rd) == !active);
833 while (offset >= kiov->kiov_len) {
834 offset -= kiov->kiov_len;
840 page_offset = kiov->kiov_offset + offset;
842 resid = offset + nob;
846 LASSERT (npages < LNET_MAX_IOV);
849 if ((npages > 0 && kiov->kiov_offset != 0) ||
850 (resid > kiov->kiov_len &&
851 (kiov->kiov_offset + kiov->kiov_len) != PAGE_SIZE)) {
852 /* Can't have gaps */
853 CERROR ("Can't make payload contiguous in I/O VM:"
854 "page %d, offset %d, len %d \n",
855 npages, kiov->kiov_offset, kiov->kiov_len);
860 tx->tx_pages[npages++] = lnet_page2phys(kiov->kiov_page);
861 resid -= kiov->kiov_len;
866 return kibnal_map_tx(tx, rd, active, npages, page_offset, nob);
871 kibnal_find_conn_locked (kib_peer_t *peer)
873 struct list_head *tmp;
875 /* just return the first connection */
876 list_for_each (tmp, &peer->ibp_conns) {
877 return (list_entry(tmp, kib_conn_t, ibc_list));
884 kibnal_check_sends (kib_conn_t *conn)
892 /* Don't send anything until after the connection is established */
893 if (conn->ibc_state < IBNAL_CONN_ESTABLISHED) {
894 CDEBUG(D_NET, "%s too soon\n",
895 libcfs_nid2str(conn->ibc_peer->ibp_nid));
899 spin_lock(&conn->ibc_lock);
901 LASSERT (conn->ibc_nsends_posted <=
902 *kibnal_tunables.kib_concurrent_sends);
903 LASSERT (conn->ibc_reserved_credits >= 0);
905 while (conn->ibc_reserved_credits > 0 &&
906 !list_empty(&conn->ibc_tx_queue_rsrvd)) {
907 LASSERT (conn->ibc_version !=
908 IBNAL_MSG_VERSION_RDMAREPLYNOTRSRVD);
909 tx = list_entry(conn->ibc_tx_queue_rsrvd.next,
911 list_del(&tx->tx_list);
912 list_add_tail(&tx->tx_list, &conn->ibc_tx_queue);
913 conn->ibc_reserved_credits--;
916 if (list_empty(&conn->ibc_tx_queue) &&
917 list_empty(&conn->ibc_tx_queue_nocred) &&
918 (conn->ibc_outstanding_credits >= IBNAL_CREDIT_HIGHWATER ||
919 kibnal_send_keepalive(conn))) {
920 spin_unlock(&conn->ibc_lock);
922 tx = kibnal_get_idle_tx();
924 kibnal_init_tx_msg(tx, IBNAL_MSG_NOOP, 0);
926 spin_lock(&conn->ibc_lock);
929 kibnal_queue_tx_locked(tx, conn);
933 if (!list_empty(&conn->ibc_tx_queue_nocred)) {
934 LASSERT (conn->ibc_version !=
935 IBNAL_MSG_VERSION_RDMAREPLYNOTRSRVD);
936 tx = list_entry (conn->ibc_tx_queue_nocred.next,
939 } else if (!list_empty (&conn->ibc_tx_queue)) {
940 tx = list_entry (conn->ibc_tx_queue.next,
944 /* nothing waiting */
948 LASSERT (tx->tx_queued);
949 /* We rely on this for QP sizing */
950 LASSERT (tx->tx_nwrq > 0 && tx->tx_nwrq <= 1 + IBNAL_MAX_RDMA_FRAGS);
952 LASSERT (conn->ibc_outstanding_credits >= 0);
953 LASSERT (conn->ibc_outstanding_credits <= IBNAL_MSG_QUEUE_SIZE);
954 LASSERT (conn->ibc_credits >= 0);
955 LASSERT (conn->ibc_credits <= IBNAL_MSG_QUEUE_SIZE);
957 if (conn->ibc_nsends_posted ==
958 *kibnal_tunables.kib_concurrent_sends) {
959 /* We've got some tx completions outstanding... */
960 CDEBUG(D_NET, "%s: posted enough\n",
961 libcfs_nid2str(conn->ibc_peer->ibp_nid));
966 if (conn->ibc_credits == 0) { /* no credits */
967 CDEBUG(D_NET, "%s: no credits\n",
968 libcfs_nid2str(conn->ibc_peer->ibp_nid));
972 if (conn->ibc_credits == 1 && /* last credit reserved for */
973 conn->ibc_outstanding_credits == 0) { /* giving back credits */
974 CDEBUG(D_NET, "%s: not using last credit\n",
975 libcfs_nid2str(conn->ibc_peer->ibp_nid));
980 list_del (&tx->tx_list);
983 /* NB don't drop ibc_lock before bumping tx_sending */
985 if (tx->tx_msg->ibm_type == IBNAL_MSG_NOOP &&
986 (!list_empty(&conn->ibc_tx_queue) ||
987 !list_empty(&conn->ibc_tx_queue_nocred) ||
988 (conn->ibc_outstanding_credits < IBNAL_CREDIT_HIGHWATER &&
989 !kibnal_send_keepalive(conn)))) {
991 spin_unlock(&conn->ibc_lock);
993 spin_lock(&conn->ibc_lock);
994 CDEBUG(D_NET, "%s: redundant noop\n",
995 libcfs_nid2str(conn->ibc_peer->ibp_nid));
999 kibnal_pack_msg(tx->tx_msg, conn->ibc_version,
1000 conn->ibc_outstanding_credits,
1001 conn->ibc_peer->ibp_nid, conn->ibc_incarnation,
1005 conn->ibc_outstanding_credits = 0;
1006 conn->ibc_nsends_posted++;
1008 conn->ibc_credits--;
1010 /* CAVEAT EMPTOR! This tx could be the PUT_DONE of an RDMA
1011 * PUT. If so, it was first queued here as a PUT_REQ, sent and
1012 * stashed on ibc_active_txs, matched by an incoming PUT_ACK,
1013 * and then re-queued here. It's (just) possible that
1014 * tx_sending is non-zero if we've not done the tx_complete() from
1015 * the first send; hence the ++ rather than = below. */
1018 list_add (&tx->tx_list, &conn->ibc_active_txs);
1020 /* Keep holding ibc_lock while posting sends on this
1021 * connection; vv_post_send() isn't re-entrant on the same
1024 LASSERT (tx->tx_nwrq > 0);
1026 if (tx->tx_wrq[0].wr_type == vv_wr_rdma_write)
1027 CDEBUG(D_NET, "WORK[0]: RDMA gl %p for %d k %x -> "LPX64" k %x\n",
1028 tx->tx_wrq[0].scatgat_list->v_address,
1029 tx->tx_wrq[0].scatgat_list->length,
1030 tx->tx_wrq[0].scatgat_list->l_key,
1031 tx->tx_wrq[0].type.send.send_qp_type.rc_type.r_addr,
1032 tx->tx_wrq[0].type.send.send_qp_type.rc_type.r_r_key);
1034 CDEBUG(D_NET, "WORK[0]: %s gl %p for %d k %x\n",
1035 tx->tx_wrq[0].wr_type == vv_wr_send ? "SEND" : "????",
1036 tx->tx_wrq[0].scatgat_list->v_address,
1037 tx->tx_wrq[0].scatgat_list->length,
1038 tx->tx_wrq[0].scatgat_list->l_key);
1040 if (tx->tx_nwrq > 1) {
1041 if (tx->tx_wrq[1].wr_type == vv_wr_rdma_write)
1042 CDEBUG(D_NET, "WORK[1]: RDMA gl %p for %d k %x -> "LPX64" k %x\n",
1043 tx->tx_wrq[1].scatgat_list->v_address,
1044 tx->tx_wrq[1].scatgat_list->length,
1045 tx->tx_wrq[1].scatgat_list->l_key,
1046 tx->tx_wrq[1].type.send.send_qp_type.rc_type.r_addr,
1047 tx->tx_wrq[1].type.send.send_qp_type.rc_type.r_r_key);
1049 CDEBUG(D_NET, "WORK[1]: %s gl %p for %d k %x\n",
1050 tx->tx_wrq[1].wr_type == vv_wr_send ? "SEND" : "????",
1051 tx->tx_wrq[1].scatgat_list->v_address,
1052 tx->tx_wrq[1].scatgat_list->length,
1053 tx->tx_wrq[1].scatgat_list->l_key);
1057 vvrc = vv_return_ok;
1058 if (conn->ibc_state == IBNAL_CONN_ESTABLISHED) {
1060 vvrc = vv_post_send_list(kibnal_data.kib_hca,
1064 vv_operation_type_send_rc);
1065 rc = (vvrc == vv_return_ok) ? 0 : -EIO;
1068 conn->ibc_last_send = jiffies;
1071 /* NB credits are transferred in the actual
1072 * message, which can only be the last work item */
1073 conn->ibc_outstanding_credits += tx->tx_msg->ibm_credits;
1075 conn->ibc_credits++;
1076 conn->ibc_nsends_posted--;
1082 done = (tx->tx_sending == 0);
1084 list_del (&tx->tx_list);
1086 spin_unlock(&conn->ibc_lock);
1088 if (conn->ibc_state == IBNAL_CONN_ESTABLISHED)
1089 CERROR ("Error %d posting transmit to %s\n",
1090 vvrc, libcfs_nid2str(conn->ibc_peer->ibp_nid));
1092 CDEBUG (D_NET, "Error %d posting transmit to %s\n",
1093 rc, libcfs_nid2str(conn->ibc_peer->ibp_nid));
1095 kibnal_close_conn (conn, rc);
1098 kibnal_tx_done (tx);
1103 spin_unlock(&conn->ibc_lock);
1107 kibnal_tx_complete (kib_tx_t *tx, vv_comp_status_t vvrc)
1109 kib_conn_t *conn = tx->tx_conn;
1110 int failed = (vvrc != vv_comp_status_success);
1113 CDEBUG(D_NET, "tx %p conn %p sending %d nwrq %d vvrc %d\n",
1114 tx, conn, tx->tx_sending, tx->tx_nwrq, vvrc);
1116 LASSERT (tx->tx_sending > 0);
1119 tx->tx_status == 0 &&
1120 conn->ibc_state == IBNAL_CONN_ESTABLISHED)
1121 CDEBUG(D_NETERROR, "tx -> %s type %x cookie "LPX64
1122 "sending %d waiting %d: failed %d\n",
1123 libcfs_nid2str(conn->ibc_peer->ibp_nid),
1124 tx->tx_msg->ibm_type, tx->tx_cookie,
1125 tx->tx_sending, tx->tx_waiting, vvrc);
1127 spin_lock(&conn->ibc_lock);
1129 /* I could be racing with rdma completion. Whoever makes 'tx' idle
1130 * gets to free it, which also drops its ref on 'conn'. */
1133 conn->ibc_nsends_posted--;
1137 tx->tx_status = -EIO;
1140 idle = (tx->tx_sending == 0) && /* This is the final callback */
1141 !tx->tx_waiting && /* Not waiting for peer */
1142 !tx->tx_queued; /* Not re-queued (PUT_DONE) */
1144 list_del(&tx->tx_list);
1146 kibnal_conn_addref(conn); /* 1 ref for me.... */
1148 spin_unlock(&conn->ibc_lock);
1151 kibnal_tx_done (tx);
1154 kibnal_close_conn (conn, -EIO);
1156 kibnal_peer_alive(conn->ibc_peer);
1157 kibnal_check_sends(conn);
1160 kibnal_conn_decref(conn); /* ...until here */
1164 kibnal_init_tx_msg (kib_tx_t *tx, int type, int body_nob)
1166 vv_scatgat_t *gl = &tx->tx_gl[tx->tx_nwrq];
1167 vv_wr_t *wrq = &tx->tx_wrq[tx->tx_nwrq];
1168 int nob = offsetof (kib_msg_t, ibm_u) + body_nob;
1169 __u64 addr = (__u64)((unsigned long)((tx)->tx_msg));
1171 LASSERT (tx->tx_nwrq >= 0 &&
1172 tx->tx_nwrq < (1 + IBNAL_MAX_RDMA_FRAGS));
1173 LASSERT (nob <= IBNAL_MSG_SIZE);
1175 kibnal_init_msg(tx->tx_msg, type, body_nob);
1177 *gl = (vv_scatgat_t) {
1178 .v_address = KIBNAL_ADDR2SG(addr),
1179 .l_key = tx->tx_lkey,
1183 memset(wrq, 0, sizeof(*wrq));
1185 wrq->wr_id = kibnal_ptr2wreqid(tx, IBNAL_WID_TX);
1186 wrq->wr_type = vv_wr_send;
1187 wrq->scatgat_list = gl;
1188 wrq->num_of_data_segments = 1;
1189 wrq->completion_notification = 1;
1190 wrq->type.send.solicited_event = 1;
1191 wrq->type.send.immidiate_data_indicator = 0;
1192 wrq->type.send.send_qp_type.rc_type.fance_indicator = 0;
1198 kibnal_init_rdma (kib_tx_t *tx, int type, int nob,
1199 kib_rdma_desc_t *dstrd, __u64 dstcookie)
1201 kib_msg_t *ibmsg = tx->tx_msg;
1202 kib_rdma_desc_t *srcrd = tx->tx_rd;
1208 LASSERT (tx->tx_nwrq == 0);
1212 gl->v_address = KIBNAL_ADDR2SG(srcrd->rd_addr);
1213 gl->l_key = srcrd->rd_key;
1215 wrq = &tx->tx_wrq[0];
1217 wrq->wr_id = kibnal_ptr2wreqid(tx, IBNAL_WID_RDMA);
1218 wrq->completion_notification = 0;
1219 wrq->scatgat_list = gl;
1220 wrq->num_of_data_segments = 1;
1221 wrq->wr_type = vv_wr_rdma_write;
1222 wrq->type.send.solicited_event = 0;
1223 wrq->type.send.send_qp_type.rc_type.fance_indicator = 0;
1224 wrq->type.send.send_qp_type.rc_type.r_addr = dstrd->rd_addr;
1225 wrq->type.send.send_qp_type.rc_type.r_r_key = dstrd->rd_key;
1230 /* CAVEAT EMPTOR: this 'consumes' the frags in 'dstrd' */
1232 kib_rdma_frag_t *srcfrag;
1234 kib_rdma_frag_t *dstfrag;
1238 /* Called by scheduler */
1239 LASSERT (!in_interrupt());
1241 LASSERT (type == IBNAL_MSG_GET_DONE ||
1242 type == IBNAL_MSG_PUT_DONE);
1244 srcidx = dstidx = 0;
1245 srcfrag = &srcrd->rd_frags[0];
1246 dstfrag = &dstrd->rd_frags[0];
1250 if (srcidx >= srcrd->rd_nfrag) {
1251 CERROR("Src buffer exhausted: %d frags\n", srcidx);
1256 if (dstidx == dstrd->rd_nfrag) {
1257 CERROR("Dst buffer exhausted: %d frags\n", dstidx);
1262 if (tx->tx_nwrq == IBNAL_MAX_RDMA_FRAGS) {
1263 CERROR("RDMA too fragmented: %d/%d src %d/%d dst frags\n",
1264 srcidx, srcrd->rd_nfrag,
1265 dstidx, dstrd->rd_nfrag);
1270 wrknob = MIN(MIN(srcfrag->rf_nob, dstfrag->rf_nob), resid);
1272 gl = &tx->tx_gl[tx->tx_nwrq];
1273 gl->v_address = KIBNAL_ADDR2SG(kibnal_rf_addr(srcfrag));
1274 gl->length = wrknob;
1275 gl->l_key = srcrd->rd_key;
1277 wrq = &tx->tx_wrq[tx->tx_nwrq];
1279 wrq->wr_id = kibnal_ptr2wreqid(tx, IBNAL_WID_RDMA);
1280 wrq->completion_notification = 0;
1281 wrq->scatgat_list = gl;
1282 wrq->num_of_data_segments = 1;
1283 wrq->wr_type = vv_wr_rdma_write;
1284 wrq->type.send.solicited_event = 0;
1285 wrq->type.send.send_qp_type.rc_type.fance_indicator = 0;
1286 wrq->type.send.send_qp_type.rc_type.r_addr = kibnal_rf_addr(dstfrag);
1287 wrq->type.send.send_qp_type.rc_type.r_r_key = dstrd->rd_key;
1290 if (wrknob < srcfrag->rf_nob) {
1291 kibnal_rf_set(srcfrag,
1292 kibnal_rf_addr(srcfrag) + wrknob,
1293 srcfrag->rf_nob - wrknob);
1299 if (wrknob < dstfrag->rf_nob) {
1300 kibnal_rf_set(dstfrag,
1301 kibnal_rf_addr(dstfrag) + wrknob,
1302 dstfrag->rf_nob - wrknob);
1311 if (rc < 0) /* no RDMA if completing with failure */
1315 ibmsg->ibm_u.completion.ibcm_status = rc;
1316 ibmsg->ibm_u.completion.ibcm_cookie = dstcookie;
1317 kibnal_init_tx_msg(tx, type, sizeof (kib_completion_msg_t));
1323 kibnal_queue_tx (kib_tx_t *tx, kib_conn_t *conn)
1325 spin_lock(&conn->ibc_lock);
1326 kibnal_queue_tx_locked (tx, conn);
1327 spin_unlock(&conn->ibc_lock);
1329 kibnal_check_sends(conn);
1333 kibnal_schedule_peer_arp (kib_peer_t *peer)
1335 unsigned long flags;
1337 LASSERT (peer->ibp_connecting != 0);
1338 LASSERT (peer->ibp_arp_count > 0);
1340 kibnal_peer_addref(peer); /* extra ref for connd */
1342 spin_lock_irqsave(&kibnal_data.kib_connd_lock, flags);
1344 list_add_tail (&peer->ibp_connd_list, &kibnal_data.kib_connd_peers);
1345 wake_up (&kibnal_data.kib_connd_waitq);
1347 spin_unlock_irqrestore(&kibnal_data.kib_connd_lock, flags);
1351 kibnal_launch_tx (kib_tx_t *tx, lnet_nid_t nid)
1355 unsigned long flags;
1356 rwlock_t *g_lock = &kibnal_data.kib_global_lock;
1360 /* If I get here, I've committed to send, so I complete the tx with
1361 * failure on any problems */
1363 LASSERT (tx->tx_conn == NULL); /* only set when assigned a conn */
1364 LASSERT (tx->tx_nwrq > 0); /* work items have been set up */
1366 for (retry = 0; ; retry = 1) {
1367 read_lock_irqsave(g_lock, flags);
1369 peer = kibnal_find_peer_locked (nid);
1371 conn = kibnal_find_conn_locked (peer);
1373 kibnal_conn_addref(conn); /* 1 ref for me... */
1374 read_unlock_irqrestore(g_lock, flags);
1376 kibnal_queue_tx (tx, conn);
1377 kibnal_conn_decref(conn); /* ...to here */
1382 /* Making one or more connections; I'll need a write lock... */
1383 read_unlock(g_lock);
1386 peer = kibnal_find_peer_locked (nid);
1390 write_unlock_irqrestore(g_lock, flags);
1393 CERROR("Can't find peer %s\n", libcfs_nid2str(nid));
1395 tx->tx_status = -EHOSTUNREACH;
1397 kibnal_tx_done (tx);
1401 rc = kibnal_add_persistent_peer(nid, LNET_NIDADDR(nid));
1403 CERROR("Can't add peer %s: %d\n",
1404 libcfs_nid2str(nid), rc);
1406 tx->tx_status = -EHOSTUNREACH;
1408 kibnal_tx_done (tx);
1413 conn = kibnal_find_conn_locked (peer);
1415 /* Connection exists; queue message on it */
1416 kibnal_conn_addref(conn); /* 1 ref for me... */
1417 write_unlock_irqrestore(g_lock, flags);
1419 kibnal_queue_tx (tx, conn);
1420 kibnal_conn_decref(conn); /* ...until here */
1424 if (peer->ibp_connecting == 0 &&
1425 peer->ibp_accepting == 0) {
1426 if (!(peer->ibp_reconnect_interval == 0 || /* first attempt */
1427 time_after_eq(jiffies, peer->ibp_reconnect_time))) {
1428 write_unlock_irqrestore(g_lock, flags);
1429 tx->tx_status = -EHOSTUNREACH;
1431 kibnal_tx_done (tx);
1435 peer->ibp_connecting = 1;
1436 peer->ibp_arp_count = 1 + *kibnal_tunables.kib_arp_retries;
1437 kibnal_schedule_peer_arp(peer);
1440 /* A connection is being established; queue the message... */
1441 list_add_tail (&tx->tx_list, &peer->ibp_tx_queue);
1443 write_unlock_irqrestore(g_lock, flags);
1447 kibnal_send(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg)
1449 lnet_hdr_t *hdr = &lntmsg->msg_hdr;
1450 int type = lntmsg->msg_type;
1451 lnet_process_id_t target = lntmsg->msg_target;
1452 int target_is_router = lntmsg->msg_target_is_router;
1453 int routing = lntmsg->msg_routing;
1454 unsigned int payload_niov = lntmsg->msg_niov;
1455 struct iovec *payload_iov = lntmsg->msg_iov;
1456 lnet_kiov_t *payload_kiov = lntmsg->msg_kiov;
1457 unsigned int payload_offset = lntmsg->msg_offset;
1458 unsigned int payload_nob = lntmsg->msg_len;
1464 /* NB 'private' is different depending on what we're sending.... */
1466 CDEBUG(D_NET, "sending %d bytes in %d frags to %s\n",
1467 payload_nob, payload_niov, libcfs_id2str(target));
1469 LASSERT (payload_nob == 0 || payload_niov > 0);
1470 LASSERT (payload_niov <= LNET_MAX_IOV);
1472 /* Thread context */
1473 LASSERT (!in_interrupt());
1474 /* payload is either all vaddrs or all pages */
1475 LASSERT (!(payload_kiov != NULL && payload_iov != NULL));
1483 LASSERT (payload_nob == 0);
1487 if (routing || target_is_router)
1488 break; /* send IMMEDIATE */
1490 /* is the REPLY message too small for RDMA? */
1491 nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[lntmsg->msg_md->md_length]);
1492 if (nob <= IBNAL_MSG_SIZE)
1493 break; /* send IMMEDIATE */
1495 tx = kibnal_get_idle_tx();
1497 CERROR("Can allocate txd for GET to %s: \n",
1498 libcfs_nid2str(target.nid));
1503 ibmsg->ibm_u.get.ibgm_hdr = *hdr;
1504 ibmsg->ibm_u.get.ibgm_cookie = tx->tx_cookie;
1506 if ((lntmsg->msg_md->md_options & LNET_MD_KIOV) == 0)
1507 rc = kibnal_setup_rd_iov(tx, &ibmsg->ibm_u.get.ibgm_rd,
1509 lntmsg->msg_md->md_niov,
1510 lntmsg->msg_md->md_iov.iov,
1511 0, lntmsg->msg_md->md_length);
1513 rc = kibnal_setup_rd_kiov(tx, &ibmsg->ibm_u.get.ibgm_rd,
1515 lntmsg->msg_md->md_niov,
1516 lntmsg->msg_md->md_iov.kiov,
1517 0, lntmsg->msg_md->md_length);
1519 CERROR("Can't setup GET sink for %s: %d\n",
1520 libcfs_nid2str(target.nid), rc);
1526 nob = sizeof(kib_get_msg_t);
1529 int n = ibmsg->ibm_u.get.ibgm_rd.rd_nfrag;
1531 nob = offsetof(kib_get_msg_t, ibgm_rd.rd_frags[n]);
1534 kibnal_init_tx_msg(tx, IBNAL_MSG_GET_REQ, nob);
1536 tx->tx_lntmsg[1] = lnet_create_reply_msg(kibnal_data.kib_ni,
1538 if (tx->tx_lntmsg[1] == NULL) {
1539 CERROR("Can't create reply for GET -> %s\n",
1540 libcfs_nid2str(target.nid));
1545 tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg[0,1] on completion */
1546 tx->tx_waiting = 1; /* waiting for GET_DONE */
1547 kibnal_launch_tx(tx, target.nid);
1550 case LNET_MSG_REPLY:
1552 /* Is the payload small enough not to need RDMA? */
1553 nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[payload_nob]);
1554 if (nob <= IBNAL_MSG_SIZE)
1555 break; /* send IMMEDIATE */
1557 tx = kibnal_get_idle_tx();
1559 CERROR("Can't allocate %s txd for %s\n",
1560 type == LNET_MSG_PUT ? "PUT" : "REPLY",
1561 libcfs_nid2str(target.nid));
1565 if (payload_kiov == NULL)
1566 rc = kibnal_setup_rd_iov(tx, tx->tx_rd, 0,
1567 payload_niov, payload_iov,
1568 payload_offset, payload_nob);
1570 rc = kibnal_setup_rd_kiov(tx, tx->tx_rd, 0,
1571 payload_niov, payload_kiov,
1572 payload_offset, payload_nob);
1574 CERROR("Can't setup PUT src for %s: %d\n",
1575 libcfs_nid2str(target.nid), rc);
1581 ibmsg->ibm_u.putreq.ibprm_hdr = *hdr;
1582 ibmsg->ibm_u.putreq.ibprm_cookie = tx->tx_cookie;
1583 kibnal_init_tx_msg(tx, IBNAL_MSG_PUT_REQ, sizeof(kib_putreq_msg_t));
1585 tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */
1586 tx->tx_waiting = 1; /* waiting for PUT_{ACK,NAK} */
1587 kibnal_launch_tx(tx, target.nid);
1591 /* send IMMEDIATE */
1593 LASSERT (offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[payload_nob])
1596 tx = kibnal_get_idle_tx();
1598 CERROR ("Can't send %d to %s: tx descs exhausted\n",
1599 type, libcfs_nid2str(target.nid));
1604 ibmsg->ibm_u.immediate.ibim_hdr = *hdr;
1606 if (payload_kiov != NULL)
1607 lnet_copy_kiov2flat(IBNAL_MSG_SIZE, ibmsg,
1608 offsetof(kib_msg_t, ibm_u.immediate.ibim_payload),
1609 payload_niov, payload_kiov,
1610 payload_offset, payload_nob);
1612 lnet_copy_iov2flat(IBNAL_MSG_SIZE, ibmsg,
1613 offsetof(kib_msg_t, ibm_u.immediate.ibim_payload),
1614 payload_niov, payload_iov,
1615 payload_offset, payload_nob);
1617 nob = offsetof(kib_immediate_msg_t, ibim_payload[payload_nob]);
1618 kibnal_init_tx_msg (tx, IBNAL_MSG_IMMEDIATE, nob);
1620 tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */
1621 kibnal_launch_tx(tx, target.nid);
1626 kibnal_reply (lnet_ni_t *ni, kib_rx_t *rx, lnet_msg_t *lntmsg)
1628 lnet_process_id_t target = lntmsg->msg_target;
1629 unsigned int niov = lntmsg->msg_niov;
1630 struct iovec *iov = lntmsg->msg_iov;
1631 lnet_kiov_t *kiov = lntmsg->msg_kiov;
1632 unsigned int offset = lntmsg->msg_offset;
1633 unsigned int nob = lntmsg->msg_len;
1637 tx = kibnal_get_idle_tx();
1639 CERROR("Can't get tx for REPLY to %s\n",
1640 libcfs_nid2str(target.nid));
1646 else if (kiov == NULL)
1647 rc = kibnal_setup_rd_iov(tx, tx->tx_rd, 0,
1648 niov, iov, offset, nob);
1650 rc = kibnal_setup_rd_kiov(tx, tx->tx_rd, 0,
1651 niov, kiov, offset, nob);
1654 CERROR("Can't setup GET src for %s: %d\n",
1655 libcfs_nid2str(target.nid), rc);
1659 rc = kibnal_init_rdma(tx, IBNAL_MSG_GET_DONE, nob,
1660 &rx->rx_msg->ibm_u.get.ibgm_rd,
1661 rx->rx_msg->ibm_u.get.ibgm_cookie);
1663 CERROR("Can't setup rdma for GET from %s: %d\n",
1664 libcfs_nid2str(target.nid), rc);
1669 /* No RDMA: local completion may happen now! */
1670 lnet_finalize(ni, lntmsg, 0);
1672 /* RDMA: lnet_finalize(lntmsg) when it
1674 tx->tx_lntmsg[0] = lntmsg;
1677 kibnal_queue_tx(tx, rx->rx_conn);
1683 lnet_finalize(ni, lntmsg, -EIO);
1687 kibnal_eager_recv (lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg,
1690 kib_rx_t *rx = private;
1691 kib_conn_t *conn = rx->rx_conn;
1693 if (conn->ibc_version == IBNAL_MSG_VERSION_RDMAREPLYNOTRSRVD) {
1694 /* Can't block if RDMA completions need normal credits */
1695 LCONSOLE_ERROR_MSG(0x129, "Dropping message from %s: no buffers"
1696 " free. %s is running an old version of LNET "
1697 "that may deadlock if messages wait for"
1699 libcfs_nid2str(conn->ibc_peer->ibp_nid),
1700 libcfs_nid2str(conn->ibc_peer->ibp_nid));
1704 *new_private = private;
1709 kibnal_recv (lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg, int delayed,
1710 unsigned int niov, struct iovec *iov, lnet_kiov_t *kiov,
1711 unsigned int offset, unsigned int mlen, unsigned int rlen)
1713 kib_rx_t *rx = private;
1714 kib_msg_t *rxmsg = rx->rx_msg;
1715 kib_conn_t *conn = rx->rx_conn;
1722 LASSERT (mlen <= rlen);
1723 LASSERT (!in_interrupt());
1724 /* Either all pages or all vaddrs */
1725 LASSERT (!(kiov != NULL && iov != NULL));
1727 switch (rxmsg->ibm_type) {
1731 case IBNAL_MSG_IMMEDIATE:
1732 nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[rlen]);
1733 if (nob > rx->rx_nob) {
1734 CERROR ("Immediate message from %s too big: %d(%d)\n",
1735 libcfs_nid2str(rxmsg->ibm_u.immediate.ibim_hdr.src_nid),
1742 lnet_copy_flat2kiov(niov, kiov, offset,
1743 IBNAL_MSG_SIZE, rxmsg,
1744 offsetof(kib_msg_t, ibm_u.immediate.ibim_payload),
1747 lnet_copy_flat2iov(niov, iov, offset,
1748 IBNAL_MSG_SIZE, rxmsg,
1749 offsetof(kib_msg_t, ibm_u.immediate.ibim_payload),
1751 lnet_finalize (ni, lntmsg, 0);
1754 case IBNAL_MSG_PUT_REQ:
1756 lnet_finalize(ni, lntmsg, 0);
1757 kibnal_send_completion(conn, IBNAL_MSG_PUT_NAK, 0,
1758 rxmsg->ibm_u.putreq.ibprm_cookie);
1762 tx = kibnal_get_idle_tx();
1764 CERROR("Can't allocate tx for %s\n",
1765 libcfs_nid2str(conn->ibc_peer->ibp_nid));
1766 /* Not replying will break the connection */
1773 rc = kibnal_setup_rd_iov(tx,
1774 &txmsg->ibm_u.putack.ibpam_rd,
1776 niov, iov, offset, mlen);
1778 rc = kibnal_setup_rd_kiov(tx,
1779 &txmsg->ibm_u.putack.ibpam_rd,
1781 niov, kiov, offset, mlen);
1783 CERROR("Can't setup PUT sink for %s: %d\n",
1784 libcfs_nid2str(conn->ibc_peer->ibp_nid), rc);
1786 /* tell peer it's over */
1787 kibnal_send_completion(conn, IBNAL_MSG_PUT_NAK, rc,
1788 rxmsg->ibm_u.putreq.ibprm_cookie);
1792 txmsg->ibm_u.putack.ibpam_src_cookie = rxmsg->ibm_u.putreq.ibprm_cookie;
1793 txmsg->ibm_u.putack.ibpam_dst_cookie = tx->tx_cookie;
1795 nob = sizeof(kib_putack_msg_t);
1798 int n = tx->tx_msg->ibm_u.putack.ibpam_rd.rd_nfrag;
1800 nob = offsetof(kib_putack_msg_t, ibpam_rd.rd_frags[n]);
1803 kibnal_init_tx_msg(tx, IBNAL_MSG_PUT_ACK, nob);
1805 tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */
1806 tx->tx_waiting = 1; /* waiting for PUT_DONE */
1807 kibnal_queue_tx(tx, conn);
1809 if (conn->ibc_version != IBNAL_MSG_VERSION_RDMAREPLYNOTRSRVD)
1810 post_cred = 0; /* peer still owns 'rx' for sending PUT_DONE */
1813 case IBNAL_MSG_GET_REQ:
1814 if (lntmsg != NULL) {
1815 /* Optimized GET; RDMA lntmsg's payload */
1816 kibnal_reply(ni, rx, lntmsg);
1818 /* GET didn't match anything */
1819 kibnal_send_completion(conn, IBNAL_MSG_GET_DONE, -ENODATA,
1820 rxmsg->ibm_u.get.ibgm_cookie);
1825 kibnal_post_rx(rx, post_cred, 0);
1830 kibnal_thread_start (int (*fn)(void *arg), void *arg)
1832 long pid = kernel_thread (fn, arg, 0);
1837 atomic_inc (&kibnal_data.kib_nthreads);
1842 kibnal_thread_fini (void)
1844 atomic_dec (&kibnal_data.kib_nthreads);
1848 kibnal_peer_alive (kib_peer_t *peer)
1850 /* This is racy, but everyone's only writing cfs_time_current() */
1851 peer->ibp_last_alive = cfs_time_current();
1856 kibnal_peer_notify (kib_peer_t *peer)
1858 time_t last_alive = 0;
1860 unsigned long flags;
1862 read_lock_irqsave(&kibnal_data.kib_global_lock, flags);
1864 if (list_empty(&peer->ibp_conns) &&
1865 peer->ibp_accepting == 0 &&
1866 peer->ibp_connecting == 0 &&
1867 peer->ibp_error != 0) {
1868 error = peer->ibp_error;
1869 peer->ibp_error = 0;
1871 last_alive = cfs_time_current_sec() -
1872 cfs_duration_sec(cfs_time_current() -
1873 peer->ibp_last_alive);
1876 read_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
1879 lnet_notify(kibnal_data.kib_ni, peer->ibp_nid, 0, last_alive);
1883 kibnal_schedule_conn (kib_conn_t *conn)
1885 unsigned long flags;
1887 kibnal_conn_addref(conn); /* ++ref for connd */
1889 spin_lock_irqsave(&kibnal_data.kib_connd_lock, flags);
1891 list_add_tail (&conn->ibc_list, &kibnal_data.kib_connd_conns);
1892 wake_up (&kibnal_data.kib_connd_waitq);
1894 spin_unlock_irqrestore(&kibnal_data.kib_connd_lock, flags);
1898 kibnal_close_conn_locked (kib_conn_t *conn, int error)
1900 /* This just does the immediate housekeeping. 'error' is zero for a
1901 * normal shutdown which can happen only after the connection has been
1902 * established. If the connection is established, schedule the
1903 * connection to be finished off by the connd. Otherwise the connd is
1904 * already dealing with it (either to set it up or tear it down).
1905 * Caller holds kib_global_lock exclusively in irq context */
1906 kib_peer_t *peer = conn->ibc_peer;
1908 LASSERT (error != 0 || conn->ibc_state >= IBNAL_CONN_ESTABLISHED);
1910 if (error != 0 && conn->ibc_comms_error == 0)
1911 conn->ibc_comms_error = error;
1913 if (conn->ibc_state != IBNAL_CONN_ESTABLISHED)
1914 return; /* already being handled */
1916 /* NB Can't take ibc_lock here (could be in IRQ context), without
1917 * risking deadlock, so access to ibc_{tx_queue,active_txs} is racey */
1920 list_empty(&conn->ibc_tx_queue) &&
1921 list_empty(&conn->ibc_tx_queue_rsrvd) &&
1922 list_empty(&conn->ibc_tx_queue_nocred) &&
1923 list_empty(&conn->ibc_active_txs)) {
1924 CDEBUG(D_NET, "closing conn to %s"
1925 " rx# "LPD64" tx# "LPD64"\n",
1926 libcfs_nid2str(peer->ibp_nid),
1927 conn->ibc_txseq, conn->ibc_rxseq);
1929 CDEBUG(D_NETERROR, "Closing conn to %s: error %d%s%s%s%s"
1930 " rx# "LPD64" tx# "LPD64"\n",
1931 libcfs_nid2str(peer->ibp_nid), error,
1932 list_empty(&conn->ibc_tx_queue) ? "" : "(sending)",
1933 list_empty(&conn->ibc_tx_queue_rsrvd) ? "" : "(sending_rsrvd)",
1934 list_empty(&conn->ibc_tx_queue_nocred) ? "" : "(sending_nocred)",
1935 list_empty(&conn->ibc_active_txs) ? "" : "(waiting)",
1936 conn->ibc_txseq, conn->ibc_rxseq);
1939 list_del (&conn->ibc_list);
1941 if (list_empty (&peer->ibp_conns)) { /* no more conns */
1942 if (peer->ibp_persistence == 0 && /* non-persistent peer */
1943 kibnal_peer_active(peer)) /* still in peer table */
1944 kibnal_unlink_peer_locked (peer);
1946 /* set/clear error on last conn */
1947 peer->ibp_error = conn->ibc_comms_error;
1950 kibnal_set_conn_state(conn, IBNAL_CONN_DISCONNECT1);
1952 kibnal_schedule_conn(conn);
1953 kibnal_conn_decref(conn); /* lose ibc_list's ref */
1957 kibnal_close_conn (kib_conn_t *conn, int error)
1959 unsigned long flags;
1961 write_lock_irqsave(&kibnal_data.kib_global_lock, flags);
1963 kibnal_close_conn_locked (conn, error);
1965 write_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
1969 kibnal_handle_early_rxs(kib_conn_t *conn)
1971 unsigned long flags;
1974 LASSERT (!in_interrupt());
1975 LASSERT (conn->ibc_state >= IBNAL_CONN_ESTABLISHED);
1977 write_lock_irqsave(&kibnal_data.kib_global_lock, flags);
1978 while (!list_empty(&conn->ibc_early_rxs)) {
1979 rx = list_entry(conn->ibc_early_rxs.next,
1981 list_del(&rx->rx_list);
1982 write_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
1984 kibnal_handle_rx(rx);
1986 write_lock_irqsave(&kibnal_data.kib_global_lock, flags);
1988 write_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
1992 kibnal_abort_txs(kib_conn_t *conn, struct list_head *txs)
1994 LIST_HEAD (zombies);
1995 struct list_head *tmp;
1996 struct list_head *nxt;
1999 spin_lock(&conn->ibc_lock);
2001 list_for_each_safe (tmp, nxt, txs) {
2002 tx = list_entry (tmp, kib_tx_t, tx_list);
2004 if (txs == &conn->ibc_active_txs) {
2005 LASSERT (!tx->tx_queued);
2006 LASSERT (tx->tx_waiting || tx->tx_sending != 0);
2008 LASSERT (tx->tx_queued);
2011 tx->tx_status = -ECONNABORTED;
2015 if (tx->tx_sending == 0) {
2016 list_del (&tx->tx_list);
2017 list_add (&tx->tx_list, &zombies);
2021 spin_unlock(&conn->ibc_lock);
2023 kibnal_txlist_done(&zombies, -ECONNABORTED);
2027 kibnal_conn_disconnected(kib_conn_t *conn)
2030 LASSERT (!in_interrupt());
2031 LASSERT (current == kibnal_data.kib_connd);
2032 LASSERT (conn->ibc_state >= IBNAL_CONN_INIT);
2034 kibnal_set_conn_state(conn, IBNAL_CONN_DISCONNECTED);
2036 /* move QP to error state to make posted work items complete */
2037 kibnal_set_qp_state(conn, vv_qp_state_error);
2039 /* Complete all tx descs not waiting for sends to complete.
2040 * NB we should be safe from RDMA now that the QP has changed state */
2042 kibnal_abort_txs(conn, &conn->ibc_tx_queue);
2043 kibnal_abort_txs(conn, &conn->ibc_tx_queue_rsrvd);
2044 kibnal_abort_txs(conn, &conn->ibc_tx_queue_nocred);
2045 kibnal_abort_txs(conn, &conn->ibc_active_txs);
2047 kibnal_handle_early_rxs(conn);
2049 kibnal_peer_notify(conn->ibc_peer);
2053 kibnal_peer_connect_failed (kib_peer_t *peer, int active, int error)
2055 LIST_HEAD (zombies);
2056 unsigned long flags;
2058 /* Only the connd creates conns => single threaded */
2059 LASSERT (error != 0);
2060 LASSERT (!in_interrupt());
2061 LASSERT (current == kibnal_data.kib_connd);
2063 write_lock_irqsave(&kibnal_data.kib_global_lock, flags);
2066 LASSERT (peer->ibp_connecting != 0);
2067 peer->ibp_connecting--;
2069 LASSERT (peer->ibp_accepting != 0);
2070 peer->ibp_accepting--;
2073 if (peer->ibp_connecting != 0 ||
2074 peer->ibp_accepting != 0) {
2075 /* another connection attempt under way (loopback?)... */
2076 write_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
2080 if (list_empty(&peer->ibp_conns)) {
2081 /* Say when active connection can be re-attempted */
2082 peer->ibp_reconnect_interval *= 2;
2083 peer->ibp_reconnect_interval =
2084 MAX(peer->ibp_reconnect_interval,
2085 *kibnal_tunables.kib_min_reconnect_interval);
2086 peer->ibp_reconnect_interval =
2087 MIN(peer->ibp_reconnect_interval,
2088 *kibnal_tunables.kib_max_reconnect_interval);
2090 peer->ibp_reconnect_time = jiffies +
2091 peer->ibp_reconnect_interval * HZ;
2093 /* Take peer's blocked transmits to complete with error */
2094 list_add(&zombies, &peer->ibp_tx_queue);
2095 list_del_init(&peer->ibp_tx_queue);
2097 if (kibnal_peer_active(peer) &&
2098 (peer->ibp_persistence == 0)) {
2099 /* failed connection attempt on non-persistent peer */
2100 kibnal_unlink_peer_locked (peer);
2103 peer->ibp_error = error;
2105 /* Can't have blocked transmits if there are connections */
2106 LASSERT (list_empty(&peer->ibp_tx_queue));
2109 write_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
2111 kibnal_peer_notify(peer);
2113 if (list_empty (&zombies))
2116 CDEBUG (D_NETERROR, "Deleting messages for %s: connection failed\n",
2117 libcfs_nid2str(peer->ibp_nid));
2119 kibnal_txlist_done(&zombies, -EHOSTUNREACH);
2123 kibnal_reject(cm_cep_handle_t cep, int why)
2125 static cm_reject_data_t rejs[3];
2126 cm_reject_data_t *rej = &rejs[why];
2128 LASSERT (why >= 0 && why < sizeof(rejs)/sizeof(rejs[0]));
2130 /* If I wasn't so lazy, I'd initialise this only once; it's effective
2132 rej->reason = cm_rej_code_usr_rej;
2133 rej->priv_data[0] = (IBNAL_MSG_MAGIC) & 0xff;
2134 rej->priv_data[1] = (IBNAL_MSG_MAGIC >> 8) & 0xff;
2135 rej->priv_data[2] = (IBNAL_MSG_MAGIC >> 16) & 0xff;
2136 rej->priv_data[3] = (IBNAL_MSG_MAGIC >> 24) & 0xff;
2137 rej->priv_data[4] = (IBNAL_MSG_VERSION) & 0xff;
2138 rej->priv_data[5] = (IBNAL_MSG_VERSION >> 8) & 0xff;
2139 rej->priv_data[6] = why;
2141 cm_reject(cep, rej);
2145 kibnal_connreq_done(kib_conn_t *conn, int active, int status)
2147 struct list_head txs;
2148 kib_peer_t *peer = conn->ibc_peer;
2149 unsigned long flags;
2152 CDEBUG(D_NET,"%d\n", status);
2154 /* Only the connd creates conns => single threaded */
2155 LASSERT (!in_interrupt());
2156 LASSERT (current == kibnal_data.kib_connd);
2157 LASSERT (conn->ibc_state < IBNAL_CONN_ESTABLISHED);
2160 LASSERT (peer->ibp_connecting > 0);
2162 LASSERT (peer->ibp_accepting > 0);
2165 LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars));
2166 conn->ibc_connvars = NULL;
2169 /* failed to establish connection */
2170 switch (conn->ibc_state) {
2174 case IBNAL_CONN_ACTIVE_CHECK_REPLY:
2175 /* got a connection reply but failed checks */
2177 kibnal_reject(conn->ibc_cep, IBNAL_REJECT_FATAL);
2180 case IBNAL_CONN_ACTIVE_CONNECT:
2182 cm_cancel(conn->ibc_cep);
2183 cfs_pause(cfs_time_seconds(1)/10);
2184 /* cm_connect() failed immediately or
2185 * callback returned failure */
2188 case IBNAL_CONN_ACTIVE_ARP:
2190 /* ibat_get_ib_data() failed immediately
2191 * or callback returned failure */
2194 case IBNAL_CONN_INIT:
2197 case IBNAL_CONN_PASSIVE_WAIT:
2199 /* cm_accept callback returned failure */
2203 kibnal_peer_connect_failed(peer, active, status);
2204 kibnal_conn_disconnected(conn);
2208 /* connection established */
2209 write_lock_irqsave(&kibnal_data.kib_global_lock, flags);
2212 LASSERT(conn->ibc_state == IBNAL_CONN_ACTIVE_RTU);
2214 LASSERT(conn->ibc_state == IBNAL_CONN_PASSIVE_WAIT);
2217 conn->ibc_last_send = jiffies;
2218 kibnal_set_conn_state(conn, IBNAL_CONN_ESTABLISHED);
2219 kibnal_peer_alive(peer);
2221 /* Add conn to peer's list and nuke any dangling conns from a different
2222 * peer instance... */
2223 kibnal_conn_addref(conn); /* +1 ref for ibc_list */
2224 list_add(&conn->ibc_list, &peer->ibp_conns);
2225 kibnal_close_stale_conns_locked (peer, conn->ibc_incarnation);
2227 if (!kibnal_peer_active(peer) || /* peer has been deleted */
2228 conn->ibc_comms_error != 0 || /* comms error */
2229 conn->ibc_disconnect) { /* need to disconnect */
2231 /* start to shut down connection */
2232 kibnal_close_conn_locked(conn, -ECONNABORTED);
2234 write_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
2235 kibnal_peer_connect_failed(peer, active, -ECONNABORTED);
2240 peer->ibp_connecting--;
2242 peer->ibp_accepting--;
2244 /* grab pending txs while I have the lock */
2245 list_add(&txs, &peer->ibp_tx_queue);
2246 list_del_init(&peer->ibp_tx_queue);
2248 peer->ibp_reconnect_interval = 0; /* OK to reconnect at any time */
2250 write_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
2252 /* Schedule blocked txs */
2253 spin_lock (&conn->ibc_lock);
2254 while (!list_empty (&txs)) {
2255 tx = list_entry (txs.next, kib_tx_t, tx_list);
2256 list_del (&tx->tx_list);
2258 kibnal_queue_tx_locked (tx, conn);
2260 spin_unlock (&conn->ibc_lock);
2261 kibnal_check_sends (conn);
2263 /* schedule blocked rxs */
2264 kibnal_handle_early_rxs(conn);
2268 kibnal_cm_callback(cm_cep_handle_t cep, cm_conn_data_t *cmdata, void *arg)
2270 static cm_dreply_data_t drep; /* just zeroed space */
2272 kib_conn_t *conn = (kib_conn_t *)arg;
2273 unsigned long flags;
2275 /* CAVEAT EMPTOR: tasklet context */
2277 switch (cmdata->status) {
2281 case cm_event_disconn_request:
2282 /* IBNAL_CONN_ACTIVE_RTU: gets closed in kibnal_connreq_done
2283 * IBNAL_CONN_ESTABLISHED: I start it closing
2284 * otherwise: it's closing anyway */
2285 cm_disconnect(conn->ibc_cep, NULL, &drep);
2286 cm_cancel(conn->ibc_cep);
2288 write_lock_irqsave(&kibnal_data.kib_global_lock, flags);
2289 LASSERT (!conn->ibc_disconnect);
2290 conn->ibc_disconnect = 1;
2292 switch (conn->ibc_state) {
2296 case IBNAL_CONN_ACTIVE_RTU:
2297 /* kibnal_connreq_done is getting there; It'll see
2298 * ibc_disconnect set... */
2301 case IBNAL_CONN_ESTABLISHED:
2302 /* kibnal_connreq_done got there already; get
2303 * disconnect going... */
2304 kibnal_close_conn_locked(conn, 0);
2307 case IBNAL_CONN_DISCONNECT1:
2308 /* kibnal_disconnect_conn is getting there; It'll see
2309 * ibc_disconnect set... */
2312 case IBNAL_CONN_DISCONNECT2:
2313 /* kibnal_disconnect_conn got there already; complete
2314 * the disconnect. */
2315 kibnal_schedule_conn(conn);
2318 write_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
2321 case cm_event_disconn_timeout:
2322 case cm_event_disconn_reply:
2323 write_lock_irqsave(&kibnal_data.kib_global_lock, flags);
2324 LASSERT (conn->ibc_state == IBNAL_CONN_DISCONNECT2);
2325 LASSERT (!conn->ibc_disconnect);
2326 conn->ibc_disconnect = 1;
2328 /* kibnal_disconnect_conn sent the disconnect request. */
2329 kibnal_schedule_conn(conn);
2331 write_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
2334 case cm_event_connected:
2335 case cm_event_conn_timeout:
2336 case cm_event_conn_reject:
2337 LASSERT (conn->ibc_state == IBNAL_CONN_PASSIVE_WAIT);
2338 conn->ibc_connvars->cv_conndata = *cmdata;
2340 kibnal_schedule_conn(conn);
2344 kibnal_conn_decref(conn); /* lose my ref */
2348 kibnal_check_passive_wait(kib_conn_t *conn)
2352 switch (conn->ibc_connvars->cv_conndata.status) {
2356 case cm_event_connected:
2357 kibnal_conn_addref(conn); /* ++ ref for CM callback */
2358 rc = kibnal_set_qp_state(conn, vv_qp_state_rts);
2360 conn->ibc_comms_error = rc;
2361 /* connection _has_ been established; it's just that we've had
2362 * an error immediately... */
2363 kibnal_connreq_done(conn, 0, 0);
2366 case cm_event_conn_timeout:
2367 kibnal_connreq_done(conn, 0, -ETIMEDOUT);
2370 case cm_event_conn_reject:
2371 kibnal_connreq_done(conn, 0, -ECONNRESET);
2377 kibnal_recv_connreq(cm_cep_handle_t *cep, cm_request_data_t *cmreq)
2379 static kib_msg_t txmsg;
2380 static kib_msg_t rxmsg;
2381 static cm_reply_data_t reply;
2383 kib_conn_t *conn = NULL;
2387 rwlock_t *g_lock = &kibnal_data.kib_global_lock;
2390 unsigned long flags;
2395 /* I'm the connd executing in thread context
2396 * No concurrency problems with static data! */
2397 LASSERT (!in_interrupt());
2398 LASSERT (current == kibnal_data.kib_connd);
2400 if (cmreq->sid != (__u64)(*kibnal_tunables.kib_service_number)) {
2401 CERROR(LPX64" != IBNAL_SERVICE_NUMBER("LPX64")\n",
2402 cmreq->sid, (__u64)(*kibnal_tunables.kib_service_number));
2403 reason = IBNAL_REJECT_FATAL;
2407 /* copy into rxmsg to avoid alignment issues */
2408 rxmsgnob = MIN(cm_REQ_priv_data_len, sizeof(rxmsg));
2409 memcpy(&rxmsg, cmreq->priv_data, rxmsgnob);
2411 rc = kibnal_unpack_msg(&rxmsg, 0, rxmsgnob);
2413 /* SILENT! kibnal_unpack_msg() complains if required */
2414 reason = IBNAL_REJECT_FATAL;
2418 if (rxmsg.ibm_version != IBNAL_MSG_VERSION)
2419 CWARN("Connection from %s: old protocol version 0x%x\n",
2420 libcfs_nid2str(rxmsg.ibm_srcnid), rxmsg.ibm_version);
2422 if (rxmsg.ibm_type != IBNAL_MSG_CONNREQ) {
2423 CERROR("Unexpected connreq msg type: %x from %s\n",
2424 rxmsg.ibm_type, libcfs_nid2str(rxmsg.ibm_srcnid));
2425 reason = IBNAL_REJECT_FATAL;
2429 if (kibnal_data.kib_ni->ni_nid != rxmsg.ibm_dstnid) {
2430 CERROR("Can't accept %s: bad dst nid %s\n",
2431 libcfs_nid2str(rxmsg.ibm_srcnid),
2432 libcfs_nid2str(rxmsg.ibm_dstnid));
2433 reason = IBNAL_REJECT_FATAL;
2437 if (rxmsg.ibm_u.connparams.ibcp_queue_depth != IBNAL_MSG_QUEUE_SIZE) {
2438 CERROR("Can't accept %s: incompatible queue depth %d (%d wanted)\n",
2439 libcfs_nid2str(rxmsg.ibm_srcnid),
2440 rxmsg.ibm_u.connparams.ibcp_queue_depth,
2441 IBNAL_MSG_QUEUE_SIZE);
2442 reason = IBNAL_REJECT_FATAL;
2446 if (rxmsg.ibm_u.connparams.ibcp_max_msg_size > IBNAL_MSG_SIZE) {
2447 CERROR("Can't accept %s: message size %d too big (%d max)\n",
2448 libcfs_nid2str(rxmsg.ibm_srcnid),
2449 rxmsg.ibm_u.connparams.ibcp_max_msg_size,
2451 reason = IBNAL_REJECT_FATAL;
2455 if (rxmsg.ibm_u.connparams.ibcp_max_frags > IBNAL_MAX_RDMA_FRAGS) {
2456 CERROR("Can't accept %s: max frags %d too big (%d max)\n",
2457 libcfs_nid2str(rxmsg.ibm_srcnid),
2458 rxmsg.ibm_u.connparams.ibcp_max_frags,
2459 IBNAL_MAX_RDMA_FRAGS);
2460 reason = IBNAL_REJECT_FATAL;
2464 /* assume 'rxmsg.ibm_srcnid' is a new peer; create */
2465 rc = kibnal_create_peer (&peer, rxmsg.ibm_srcnid);
2467 CERROR("Can't create peer for %s\n",
2468 libcfs_nid2str(rxmsg.ibm_srcnid));
2469 reason = IBNAL_REJECT_NO_RESOURCES;
2473 write_lock_irqsave(g_lock, flags);
2475 if (kibnal_data.kib_listen_handle == NULL) {
2476 write_unlock_irqrestore(g_lock, flags);
2478 CWARN ("Shutdown has started, rejecting connreq from %s\n",
2479 libcfs_nid2str(rxmsg.ibm_srcnid));
2480 kibnal_peer_decref(peer);
2481 reason = IBNAL_REJECT_FATAL;
2485 peer2 = kibnal_find_peer_locked(rxmsg.ibm_srcnid);
2486 if (peer2 != NULL) {
2487 /* tie-break connection race in favour of the higher NID */
2488 if (peer2->ibp_connecting != 0 &&
2489 rxmsg.ibm_srcnid < kibnal_data.kib_ni->ni_nid) {
2490 write_unlock_irqrestore(g_lock, flags);
2492 CWARN("Conn race %s\n",
2493 libcfs_nid2str(rxmsg.ibm_srcnid));
2495 kibnal_peer_decref(peer);
2496 reason = IBNAL_REJECT_CONN_RACE;
2500 peer2->ibp_accepting++;
2501 kibnal_peer_addref(peer2);
2503 write_unlock_irqrestore(g_lock, flags);
2504 kibnal_peer_decref(peer);
2507 /* Brand new peer */
2508 LASSERT (peer->ibp_accepting == 0);
2509 peer->ibp_accepting = 1;
2511 kibnal_peer_addref(peer);
2512 list_add_tail(&peer->ibp_list, kibnal_nid2peerlist(rxmsg.ibm_srcnid));
2514 write_unlock_irqrestore(g_lock, flags);
2517 conn = kibnal_create_conn(cep);
2519 CERROR("Can't create conn for %s\n",
2520 libcfs_nid2str(rxmsg.ibm_srcnid));
2521 kibnal_peer_connect_failed(peer, 0, -ENOMEM);
2522 kibnal_peer_decref(peer);
2523 reason = IBNAL_REJECT_NO_RESOURCES;
2527 conn->ibc_version = rxmsg.ibm_version;
2529 conn->ibc_peer = peer; /* conn takes over my ref */
2530 conn->ibc_incarnation = rxmsg.ibm_srcstamp;
2531 conn->ibc_credits = IBNAL_MSG_QUEUE_SIZE;
2532 conn->ibc_reserved_credits = IBNAL_MSG_QUEUE_SIZE;
2533 LASSERT (conn->ibc_credits + conn->ibc_reserved_credits
2536 cv = conn->ibc_connvars;
2538 cv->cv_txpsn = cmreq->cep_data.start_psn;
2539 cv->cv_remote_qpn = cmreq->cep_data.qpn;
2540 cv->cv_path = cmreq->path_data.path;
2541 cv->cv_rnr_count = cmreq->cep_data.rtr_retry_cnt;
2542 // XXX cmreq->cep_data.retry_cnt;
2543 cv->cv_port = cmreq->cep_data.local_port_num;
2545 vvrc = gid2gid_index(kibnal_data.kib_hca, cv->cv_port,
2546 &cv->cv_path.sgid, &cv->cv_sgid_index);
2547 if (vvrc != vv_return_ok) {
2548 CERROR("gid2gid_index failed for %s: %d\n",
2549 libcfs_nid2str(rxmsg.ibm_srcnid), vvrc);
2551 reason = IBNAL_REJECT_FATAL;
2555 vvrc = pkey2pkey_index(kibnal_data.kib_hca, cv->cv_port,
2556 cv->cv_path.pkey, &cv->cv_pkey_index);
2557 if (vvrc != vv_return_ok) {
2558 CERROR("pkey2pkey_index failed for %s: %d\n",
2559 libcfs_nid2str(rxmsg.ibm_srcnid), vvrc);
2561 reason = IBNAL_REJECT_FATAL;
2565 rc = kibnal_set_qp_state(conn, vv_qp_state_init);
2567 reason = IBNAL_REJECT_FATAL;
2571 rc = kibnal_post_receives(conn);
2573 CERROR("Can't post receives for %s\n",
2574 libcfs_nid2str(rxmsg.ibm_srcnid));
2575 reason = IBNAL_REJECT_FATAL;
2579 rc = kibnal_set_qp_state(conn, vv_qp_state_rtr);
2581 reason = IBNAL_REJECT_FATAL;
2585 memset(&reply, 0, sizeof(reply));
2586 reply.qpn = cv->cv_local_qpn;
2587 reply.qkey = IBNAL_QKEY;
2588 reply.start_psn = cv->cv_rxpsn;
2589 reply.arb_initiator_depth = IBNAL_ARB_INITIATOR_DEPTH;
2590 reply.arb_resp_res = IBNAL_ARB_RESP_RES;
2591 reply.failover_accepted = IBNAL_FAILOVER_ACCEPTED;
2592 reply.rnr_retry_count = cv->cv_rnr_count;
2593 reply.targ_ack_delay = kibnal_data.kib_hca_attrs.ack_delay;
2595 /* setup txmsg... */
2596 memset(&txmsg, 0, sizeof(txmsg));
2597 kibnal_init_msg(&txmsg, IBNAL_MSG_CONNACK,
2598 sizeof(txmsg.ibm_u.connparams));
2599 LASSERT (txmsg.ibm_nob <= cm_REP_priv_data_len);
2600 txmsg.ibm_u.connparams.ibcp_queue_depth = IBNAL_MSG_QUEUE_SIZE;
2601 txmsg.ibm_u.connparams.ibcp_max_msg_size = IBNAL_MSG_SIZE;
2602 txmsg.ibm_u.connparams.ibcp_max_frags = IBNAL_MAX_RDMA_FRAGS;
2603 kibnal_pack_msg(&txmsg, conn->ibc_version,
2604 0, rxmsg.ibm_srcnid, rxmsg.ibm_srcstamp, 0);
2606 /* ...and copy into reply to avoid alignment issues */
2607 memcpy(&reply.priv_data, &txmsg, txmsg.ibm_nob);
2609 kibnal_set_conn_state(conn, IBNAL_CONN_PASSIVE_WAIT);
2611 cmrc = cm_accept(conn->ibc_cep, &reply, NULL,
2612 kibnal_cm_callback, conn);
2614 if (cmrc == cm_stat_success)
2615 return; /* callback has got my ref on conn */
2617 /* back out state change (no callback happening) */
2618 kibnal_set_conn_state(conn, IBNAL_CONN_INIT);
2620 reason = IBNAL_REJECT_FATAL;
2623 CDEBUG(D_NET, "Rejecting connreq from %s\n",
2624 libcfs_nid2str(rxmsg.ibm_srcnid));
2626 kibnal_reject(cep, reason);
2630 kibnal_connreq_done(conn, 0, rc);
2631 kibnal_conn_decref(conn);
2633 cm_destroy_cep(cep);
2638 kibnal_listen_callback(cm_cep_handle_t cep, cm_conn_data_t *data, void *arg)
2640 cm_request_data_t *cmreq = &data->data.request;
2642 unsigned long flags;
2644 LASSERT (arg == NULL);
2646 if (data->status != cm_event_conn_request) {
2647 CERROR("status %d is not cm_event_conn_request\n",
2652 LIBCFS_ALLOC_ATOMIC(pcr, sizeof(*pcr));
2654 CERROR("Can't allocate passive connreq\n");
2656 kibnal_reject(cep, IBNAL_REJECT_NO_RESOURCES);
2657 cm_destroy_cep(cep);
2662 pcr->pcr_cmreq = *cmreq;
2664 spin_lock_irqsave(&kibnal_data.kib_connd_lock, flags);
2666 list_add_tail(&pcr->pcr_list, &kibnal_data.kib_connd_pcreqs);
2667 wake_up(&kibnal_data.kib_connd_waitq);
2668 spin_unlock_irqrestore(&kibnal_data.kib_connd_lock, flags);
2673 kibnal_active_connect_callback (cm_cep_handle_t cep, cm_conn_data_t *cd,
2676 /* CAVEAT EMPTOR: tasklet context */
2677 kib_conn_t *conn = (kib_conn_t *)arg;
2678 kib_connvars_t *cv = conn->ibc_connvars;
2680 LASSERT (conn->ibc_state == IBNAL_CONN_ACTIVE_CONNECT);
2681 cv->cv_conndata = *cd;
2683 kibnal_schedule_conn(conn);
2684 kibnal_conn_decref(conn);
2688 kibnal_connect_conn (kib_conn_t *conn)
2690 static cm_request_data_t cmreq;
2691 static kib_msg_t msg;
2693 kib_connvars_t *cv = conn->ibc_connvars;
2694 kib_peer_t *peer = conn->ibc_peer;
2697 /* Only called by connd => statics OK */
2698 LASSERT (!in_interrupt());
2699 LASSERT (current == kibnal_data.kib_connd);
2700 LASSERT (conn->ibc_state == IBNAL_CONN_ACTIVE_ARP);
2702 memset(&cmreq, 0, sizeof(cmreq));
2704 cmreq.sid = (__u64)(*kibnal_tunables.kib_service_number);
2706 cmreq.cep_data.ca_guid = kibnal_data.kib_hca_attrs.guid;
2707 cmreq.cep_data.qpn = cv->cv_local_qpn;
2708 cmreq.cep_data.retry_cnt = *kibnal_tunables.kib_retry_cnt;
2709 cmreq.cep_data.rtr_retry_cnt = *kibnal_tunables.kib_rnr_cnt;
2710 cmreq.cep_data.start_psn = cv->cv_rxpsn;
2711 cmreq.cep_data.end_to_end_flow_ctrl = IBNAL_EE_FLOW_CNT;
2714 // offered_initiator_depth
2716 cmreq.path_data.subn_local = IBNAL_LOCAL_SUB;
2717 cmreq.path_data.path = cv->cv_path;
2720 memset(&msg, 0, sizeof(msg));
2721 kibnal_init_msg(&msg, IBNAL_MSG_CONNREQ, sizeof(msg.ibm_u.connparams));
2722 LASSERT(msg.ibm_nob <= cm_REQ_priv_data_len);
2723 msg.ibm_u.connparams.ibcp_queue_depth = IBNAL_MSG_QUEUE_SIZE;
2724 msg.ibm_u.connparams.ibcp_max_msg_size = IBNAL_MSG_SIZE;
2725 msg.ibm_u.connparams.ibcp_max_frags = IBNAL_MAX_RDMA_FRAGS;
2726 kibnal_pack_msg(&msg, conn->ibc_version, 0, peer->ibp_nid, 0, 0);
2728 if (the_lnet.ln_testprotocompat != 0) {
2729 /* single-shot proto check */
2731 if ((the_lnet.ln_testprotocompat & 1) != 0) {
2733 the_lnet.ln_testprotocompat &= ~1;
2735 if ((the_lnet.ln_testprotocompat & 2) != 0) {
2736 msg.ibm_magic = LNET_PROTO_MAGIC;
2737 the_lnet.ln_testprotocompat &= ~2;
2742 /* ...and copy into cmreq to avoid alignment issues */
2743 memcpy(&cmreq.priv_data, &msg, msg.ibm_nob);
2745 CDEBUG(D_NET, "Connecting %p to %s\n", conn,
2746 libcfs_nid2str(peer->ibp_nid));
2748 kibnal_conn_addref(conn); /* ++ref for CM callback */
2749 kibnal_set_conn_state(conn, IBNAL_CONN_ACTIVE_CONNECT);
2751 cmrc = cm_connect(conn->ibc_cep, &cmreq,
2752 kibnal_active_connect_callback, conn);
2753 if (cmrc == cm_stat_success) {
2754 CDEBUG(D_NET, "connection REQ sent to %s\n",
2755 libcfs_nid2str(peer->ibp_nid));
2759 CERROR ("Connect %s failed: %d\n", libcfs_nid2str(peer->ibp_nid), cmrc);
2760 kibnal_conn_decref(conn); /* drop callback's ref */
2761 kibnal_connreq_done(conn, 1, -EHOSTUNREACH);
2765 kibnal_reconnect (kib_conn_t *conn, int why)
2767 kib_peer_t *peer = conn->ibc_peer;
2769 unsigned long flags;
2771 cm_cep_handle_t cep;
2773 LASSERT (conn->ibc_state == IBNAL_CONN_ACTIVE_CONNECT);
2775 read_lock_irqsave(&kibnal_data.kib_global_lock, flags);
2777 LASSERT (peer->ibp_connecting > 0); /* 'conn' at least */
2779 /* retry connection if it's still needed and no other connection
2780 * attempts (active or passive) are in progress.
2781 * Immediate reconnect is required, so I don't even look at the
2782 * reconnection timeout etc */
2784 retry = (!list_empty(&peer->ibp_tx_queue) &&
2785 peer->ibp_connecting == 1 &&
2786 peer->ibp_accepting == 0);
2788 read_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
2791 kibnal_connreq_done(conn, 1, why);
2795 cep = cm_create_cep(cm_cep_transp_rc);
2797 CERROR("Can't create new CEP\n");
2798 kibnal_connreq_done(conn, 1, -ENOMEM);
2802 cmrc = cm_cancel(conn->ibc_cep);
2803 LASSERT (cmrc == cm_stat_success);
2804 cmrc = cm_destroy_cep(conn->ibc_cep);
2805 LASSERT (cmrc == cm_stat_success);
2807 conn->ibc_cep = cep;
2809 /* reuse conn; no need to peer->ibp_connecting++ */
2810 kibnal_set_conn_state(conn, IBNAL_CONN_ACTIVE_ARP);
2811 kibnal_connect_conn(conn);
2815 kibnal_check_connreply (kib_conn_t *conn)
2817 static cm_rtu_data_t rtu;
2818 static kib_msg_t msg;
2820 kib_connvars_t *cv = conn->ibc_connvars;
2821 cm_reply_data_t *reply = &cv->cv_conndata.data.reply;
2822 kib_peer_t *peer = conn->ibc_peer;
2825 unsigned long flags;
2828 /* Only called by connd => statics OK */
2829 LASSERT (!in_interrupt());
2830 LASSERT (current == kibnal_data.kib_connd);
2831 LASSERT (conn->ibc_state == IBNAL_CONN_ACTIVE_CONNECT);
2833 if (cv->cv_conndata.status == cm_event_conn_reply) {
2834 cv->cv_remote_qpn = reply->qpn;
2835 cv->cv_txpsn = reply->start_psn;
2836 // XXX reply->targ_ack_delay;
2837 cv->cv_rnr_count = reply->rnr_retry_count;
2839 kibnal_set_conn_state(conn, IBNAL_CONN_ACTIVE_CHECK_REPLY);
2841 /* copy into msg to avoid alignment issues */
2842 msgnob = MIN(cm_REP_priv_data_len, sizeof(msg));
2843 memcpy(&msg, &reply->priv_data, msgnob);
2845 rc = kibnal_unpack_msg(&msg, conn->ibc_version, msgnob);
2847 CERROR("Can't unpack reply from %s\n",
2848 libcfs_nid2str(peer->ibp_nid));
2849 kibnal_connreq_done(conn, 1, rc);
2853 if (msg.ibm_type != IBNAL_MSG_CONNACK ) {
2854 CERROR("Unexpected message type %d from %s\n",
2855 msg.ibm_type, libcfs_nid2str(peer->ibp_nid));
2856 kibnal_connreq_done(conn, 1, -EPROTO);
2860 if (msg.ibm_u.connparams.ibcp_queue_depth != IBNAL_MSG_QUEUE_SIZE) {
2861 CERROR("%s has incompatible queue depth %d(%d wanted)\n",
2862 libcfs_nid2str(peer->ibp_nid),
2863 msg.ibm_u.connparams.ibcp_queue_depth,
2864 IBNAL_MSG_QUEUE_SIZE);
2865 kibnal_connreq_done(conn, 1, -EPROTO);
2869 if (msg.ibm_u.connparams.ibcp_max_msg_size > IBNAL_MSG_SIZE) {
2870 CERROR("%s max message size %d too big (%d max)\n",
2871 libcfs_nid2str(peer->ibp_nid),
2872 msg.ibm_u.connparams.ibcp_max_msg_size,
2874 kibnal_connreq_done(conn, 1, -EPROTO);
2878 if (msg.ibm_u.connparams.ibcp_max_frags > IBNAL_MAX_RDMA_FRAGS) {
2879 CERROR("%s max frags %d too big (%d max)\n",
2880 libcfs_nid2str(peer->ibp_nid),
2881 msg.ibm_u.connparams.ibcp_max_frags,
2882 IBNAL_MAX_RDMA_FRAGS);
2883 kibnal_connreq_done(conn, 1, -EPROTO);
2887 read_lock_irqsave(&kibnal_data.kib_global_lock, flags);
2888 if (kibnal_data.kib_ni->ni_nid == msg.ibm_dstnid &&
2889 msg.ibm_dststamp == kibnal_data.kib_incarnation)
2893 read_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
2895 CERROR("Stale connection reply from %s\n",
2896 libcfs_nid2str(peer->ibp_nid));
2897 kibnal_connreq_done(conn, 1, rc);
2901 conn->ibc_incarnation = msg.ibm_srcstamp;
2902 conn->ibc_credits = IBNAL_MSG_QUEUE_SIZE;
2903 conn->ibc_reserved_credits = IBNAL_MSG_QUEUE_SIZE;
2904 LASSERT (conn->ibc_credits + conn->ibc_reserved_credits
2907 rc = kibnal_post_receives(conn);
2909 CERROR("Can't post receives for %s\n",
2910 libcfs_nid2str(peer->ibp_nid));
2911 kibnal_connreq_done(conn, 1, rc);
2915 rc = kibnal_set_qp_state(conn, vv_qp_state_rtr);
2917 kibnal_connreq_done(conn, 1, rc);
2921 rc = kibnal_set_qp_state(conn, vv_qp_state_rts);
2923 kibnal_connreq_done(conn, 1, rc);
2927 kibnal_set_conn_state(conn, IBNAL_CONN_ACTIVE_RTU);
2928 kibnal_conn_addref(conn); /* ++for CM callback */
2930 memset(&rtu, 0, sizeof(rtu));
2931 cmrc = cm_accept(conn->ibc_cep, NULL, &rtu,
2932 kibnal_cm_callback, conn);
2933 if (cmrc == cm_stat_success) {
2934 /* Now I'm racing with disconnect signalled by
2935 * kibnal_cm_callback */
2936 kibnal_connreq_done(conn, 1, 0);
2940 CERROR("cm_accept %s failed: %d\n",
2941 libcfs_nid2str(peer->ibp_nid), cmrc);
2942 /* Back out of RTU: no callback coming */
2943 kibnal_set_conn_state(conn, IBNAL_CONN_ACTIVE_CHECK_REPLY);
2944 kibnal_conn_decref(conn);
2945 kibnal_connreq_done(conn, 1, -EIO);
2949 if (cv->cv_conndata.status == cm_event_conn_reject) {
2951 if (cv->cv_conndata.data.reject.reason == cm_rej_code_usr_rej) {
2952 unsigned char *bytes =
2953 cv->cv_conndata.data.reject.priv_data;
2954 int magic = (bytes[0]) |
2958 int version = (bytes[4]) |
2960 int why = (bytes[6]);
2962 /* Expected proto/version: she just doesn't like me (or
2963 * ran out of resources) */
2964 if (magic == IBNAL_MSG_MAGIC &&
2965 version == conn->ibc_version) {
2966 CERROR("conn -> %s rejected: fatal error %d\n",
2967 libcfs_nid2str(peer->ibp_nid), why);
2969 if (why == IBNAL_REJECT_CONN_RACE)
2970 kibnal_reconnect(conn, -EALREADY);
2972 kibnal_connreq_done(conn, 1, -ECONNREFUSED);
2976 /* Fail unless it's worth retrying with an old proto
2978 if (!(magic == IBNAL_MSG_MAGIC &&
2979 version == IBNAL_MSG_VERSION_RDMAREPLYNOTRSRVD &&
2980 conn->ibc_version == IBNAL_MSG_VERSION)) {
2981 CERROR("conn -> %s rejected: bad protocol "
2982 "magic/ver %08x/%x why %d\n",
2983 libcfs_nid2str(peer->ibp_nid),
2984 magic, version, why);
2986 kibnal_connreq_done(conn, 1, -ECONNREFUSED);
2990 conn->ibc_version = version;
2991 CWARN ("Connection to %s refused: "
2992 "retrying with old protocol version 0x%x\n",
2993 libcfs_nid2str(peer->ibp_nid), version);
2995 kibnal_reconnect(conn, -ECONNREFUSED);
2997 } else if (cv->cv_conndata.data.reject.reason ==
2998 cm_rej_code_stale_conn) {
3000 CWARN ("conn -> %s stale: retrying\n",
3001 libcfs_nid2str(peer->ibp_nid));
3003 kibnal_reconnect(conn, -ESTALE);
3006 CDEBUG(D_NETERROR, "conn -> %s rejected: reason %d\n",
3007 libcfs_nid2str(peer->ibp_nid),
3008 cv->cv_conndata.data.reject.reason);
3009 kibnal_connreq_done(conn, 1, -ECONNREFUSED);
3015 CDEBUG(D_NETERROR, "conn -> %s failed: %d\n",
3016 libcfs_nid2str(peer->ibp_nid), cv->cv_conndata.status);
3017 kibnal_connreq_done(conn, 1, -ECONNABORTED);
3021 kibnal_arp_done (kib_conn_t *conn)
3023 kib_peer_t *peer = conn->ibc_peer;
3024 kib_connvars_t *cv = conn->ibc_connvars;
3025 ibat_arp_data_t *arp = &cv->cv_arp;
3026 ib_path_record_v2_t *path = &cv->cv_path;
3029 unsigned long flags;
3031 LASSERT (!in_interrupt());
3032 LASSERT (current == kibnal_data.kib_connd);
3033 LASSERT (conn->ibc_state == IBNAL_CONN_ACTIVE_ARP);
3034 LASSERT (peer->ibp_arp_count > 0);
3036 if (cv->cv_arprc != ibat_stat_ok) {
3037 CDEBUG(D_NETERROR, "Arp %s @ %u.%u.%u.%u failed: %d\n",
3038 libcfs_nid2str(peer->ibp_nid), HIPQUAD(peer->ibp_ip),
3043 if ((arp->mask & IBAT_PRI_PATH_VALID) != 0) {
3044 CDEBUG(D_NET, "Got valid path for %s\n",
3045 libcfs_nid2str(peer->ibp_nid));
3047 *path = *arp->primary_path;
3049 vvrc = base_gid2port_num(kibnal_data.kib_hca, &path->sgid,
3051 if (vvrc != vv_return_ok) {
3052 CWARN("base_gid2port_num failed for %s @ %u.%u.%u.%u: %d\n",
3053 libcfs_nid2str(peer->ibp_nid),
3054 HIPQUAD(peer->ibp_ip), vvrc);
3058 vvrc = gid2gid_index(kibnal_data.kib_hca, cv->cv_port,
3059 &path->sgid, &cv->cv_sgid_index);
3060 if (vvrc != vv_return_ok) {
3061 CWARN("gid2gid_index failed for %s @ %u.%u.%u.%u: %d\n",
3062 libcfs_nid2str(peer->ibp_nid),
3063 HIPQUAD(peer->ibp_ip), vvrc);
3067 vvrc = pkey2pkey_index(kibnal_data.kib_hca, cv->cv_port,
3068 path->pkey, &cv->cv_pkey_index);
3069 if (vvrc != vv_return_ok) {
3070 CWARN("pkey2pkey_index failed for %s @ %u.%u.%u.%u: %d\n",
3071 libcfs_nid2str(peer->ibp_nid),
3072 HIPQUAD(peer->ibp_ip), vvrc);
3076 path->mtu = IBNAL_IB_MTU;
3078 } else if ((arp->mask & IBAT_LID_VALID) != 0) {
3079 CWARN("Creating new path record for %s @ %u.%u.%u.%u\n",
3080 libcfs_nid2str(peer->ibp_nid), HIPQUAD(peer->ibp_ip));
3082 cv->cv_pkey_index = IBNAL_PKEY_IDX;
3083 cv->cv_sgid_index = IBNAL_SGID_IDX;
3084 cv->cv_port = arp->local_port_num;
3086 memset(path, 0, sizeof(*path));
3088 vvrc = port_num2base_gid(kibnal_data.kib_hca, cv->cv_port,
3090 if (vvrc != vv_return_ok) {
3091 CWARN("port_num2base_gid failed for %s @ %u.%u.%u.%u: %d\n",
3092 libcfs_nid2str(peer->ibp_ip),
3093 HIPQUAD(peer->ibp_ip), vvrc);
3097 vvrc = port_num2base_lid(kibnal_data.kib_hca, cv->cv_port,
3099 if (vvrc != vv_return_ok) {
3100 CWARN("port_num2base_lid failed for %s @ %u.%u.%u.%u: %d\n",
3101 libcfs_nid2str(peer->ibp_ip),
3102 HIPQUAD(peer->ibp_ip), vvrc);
3106 path->dgid = arp->gid;
3107 path->sl = IBNAL_SERVICE_LEVEL;
3108 path->dlid = arp->lid;
3109 path->mtu = IBNAL_IB_MTU;
3110 path->rate = IBNAL_STATIC_RATE;
3111 path->pkt_life_time = IBNAL_PKT_LIFETIME;
3112 path->pkey = IBNAL_PKEY;
3113 path->traffic_class = IBNAL_TRAFFIC_CLASS;
3115 CWARN("Arp for %s @ %u.%u.%u.%u returned neither PATH nor LID\n",
3116 libcfs_nid2str(peer->ibp_nid), HIPQUAD(peer->ibp_ip));
3120 rc = kibnal_set_qp_state(conn, vv_qp_state_init);
3122 kibnal_connreq_done(conn, 1, rc);
3125 /* do the actual connection request */
3126 kibnal_connect_conn(conn);
3130 write_lock_irqsave(&kibnal_data.kib_global_lock, flags);
3131 peer->ibp_arp_count--;
3132 if (peer->ibp_arp_count == 0) {
3133 /* final ARP attempt failed */
3134 write_unlock_irqrestore(&kibnal_data.kib_global_lock,
3136 CDEBUG(D_NETERROR, "Arp %s @ %u.%u.%u.%u failed (final attempt)\n",
3137 libcfs_nid2str(peer->ibp_nid), HIPQUAD(peer->ibp_ip));
3139 /* Retry ARP: ibp_connecting++ so terminating conn
3140 * doesn't end peer's connection attempt */
3141 peer->ibp_connecting++;
3142 write_unlock_irqrestore(&kibnal_data.kib_global_lock,
3144 CDEBUG(D_NETERROR, "Arp %s @ %u.%u.%u.%u failed (%d attempts left)\n",
3145 libcfs_nid2str(peer->ibp_nid), HIPQUAD(peer->ibp_ip),
3146 peer->ibp_arp_count);
3148 kibnal_schedule_peer_arp(peer);
3150 kibnal_connreq_done(conn, 1, -ENETUNREACH);
3154 kibnal_arp_callback (ibat_stat_t arprc, ibat_arp_data_t *arp_data, void *arg)
3156 /* CAVEAT EMPTOR: tasklet context */
3158 kib_conn_t *conn = (kib_conn_t *)arg;
3160 LASSERT (conn != NULL);
3161 LASSERT (conn->ibc_state == IBNAL_CONN_ACTIVE_ARP);
3163 peer = conn->ibc_peer;
3165 if (arprc != ibat_stat_ok)
3166 CDEBUG(D_NETERROR, "Arp %s at %u.%u.%u.%u failed: %d\n",
3167 libcfs_nid2str(peer->ibp_nid), HIPQUAD(peer->ibp_ip), arprc);
3169 CDEBUG(D_NET, "Arp %s at %u.%u.%u.%u OK: LID %s PATH %s\n",
3170 libcfs_nid2str(peer->ibp_nid), HIPQUAD(peer->ibp_ip),
3171 (arp_data->mask & IBAT_LID_VALID) == 0 ? "invalid" : "valid",
3172 (arp_data->mask & IBAT_PRI_PATH_VALID) == 0 ? "invalid" : "valid");
3174 conn->ibc_connvars->cv_arprc = arprc;
3175 if (arprc == ibat_stat_ok)
3176 conn->ibc_connvars->cv_arp = *arp_data;
3178 kibnal_schedule_conn(conn);
3179 kibnal_conn_decref(conn);
3183 kibnal_arp_peer (kib_peer_t *peer)
3185 cm_cep_handle_t cep;
3189 /* Only the connd does this (i.e. single threaded) */
3190 LASSERT (current == kibnal_data.kib_connd);
3191 LASSERT (peer->ibp_connecting != 0);
3192 LASSERT (peer->ibp_arp_count > 0);
3194 cep = cm_create_cep(cm_cep_transp_rc);
3196 CERROR ("Can't create cep for conn->%s\n",
3197 libcfs_nid2str(peer->ibp_nid));
3198 kibnal_peer_connect_failed(peer, 1, -ENOMEM);
3202 conn = kibnal_create_conn(cep);
3204 CERROR ("Can't allocate conn->%s\n",
3205 libcfs_nid2str(peer->ibp_nid));
3206 cm_destroy_cep(cep);
3207 kibnal_peer_connect_failed(peer, 1, -ENOMEM);
3211 conn->ibc_peer = peer;
3212 kibnal_peer_addref(peer);
3214 kibnal_set_conn_state(conn, IBNAL_CONN_ACTIVE_ARP);
3216 ibatrc = ibat_get_ib_data(htonl(peer->ibp_ip), INADDR_ANY,
3218 &conn->ibc_connvars->cv_arp,
3219 kibnal_arp_callback, conn, 0);
3220 CDEBUG(D_NET,"ibatrc %d\n", ibatrc);
3225 case ibat_stat_pending:
3226 /* NB callback has my ref on conn */
3230 case ibat_stat_error:
3231 case ibat_stat_timeout:
3232 case ibat_stat_not_found:
3233 /* Immediate return (ARP cache hit or failure) == no callback.
3234 * Do the next stage directly... */
3235 conn->ibc_connvars->cv_arprc = ibatrc;
3236 kibnal_arp_done(conn);
3237 kibnal_conn_decref(conn);
3243 kibnal_check_txs (kib_conn_t *conn, struct list_head *txs)
3246 struct list_head *ttmp;
3249 spin_lock(&conn->ibc_lock);
3251 list_for_each (ttmp, txs) {
3252 tx = list_entry (ttmp, kib_tx_t, tx_list);
3254 if (txs == &conn->ibc_active_txs) {
3255 LASSERT (!tx->tx_queued);
3256 LASSERT (tx->tx_waiting || tx->tx_sending != 0);
3258 LASSERT (tx->tx_queued);
3261 if (time_after_eq (jiffies, tx->tx_deadline)) {
3267 spin_unlock(&conn->ibc_lock);
3272 kibnal_conn_timed_out (kib_conn_t *conn)
3274 return kibnal_check_txs(conn, &conn->ibc_tx_queue) ||
3275 kibnal_check_txs(conn, &conn->ibc_tx_queue_rsrvd) ||
3276 kibnal_check_txs(conn, &conn->ibc_tx_queue_nocred) ||
3277 kibnal_check_txs(conn, &conn->ibc_active_txs);
3281 kibnal_check_conns (int idx)
3283 struct list_head *peers = &kibnal_data.kib_peers[idx];
3284 struct list_head *ptmp;
3287 struct list_head *ctmp;
3288 unsigned long flags;
3291 /* NB. We expect to have a look at all the peers and not find any
3292 * rdmas to time out, so we just use a shared lock while we
3294 read_lock_irqsave(&kibnal_data.kib_global_lock, flags);
3296 list_for_each (ptmp, peers) {
3297 peer = list_entry (ptmp, kib_peer_t, ibp_list);
3299 list_for_each (ctmp, &peer->ibp_conns) {
3300 conn = list_entry (ctmp, kib_conn_t, ibc_list);
3302 LASSERT (conn->ibc_state == IBNAL_CONN_ESTABLISHED);
3304 /* In case we have enough credits to return via a
3305 * NOOP, but there were no non-blocking tx descs
3306 * free to do it last time... */
3307 kibnal_check_sends(conn);
3309 if (!kibnal_conn_timed_out(conn))
3312 /* Handle timeout by closing the whole connection. We
3313 * can only be sure RDMA activity has ceased once the
3314 * QP has been modified. */
3316 kibnal_conn_addref(conn); /* 1 ref for me... */
3318 read_unlock_irqrestore(&kibnal_data.kib_global_lock,
3321 CERROR("Timed out RDMA with %s\n",
3322 libcfs_nid2str(peer->ibp_nid));
3324 kibnal_close_conn (conn, -ETIMEDOUT);
3325 kibnal_conn_decref(conn); /* ...until here */
3327 /* start again now I've dropped the lock */
3332 read_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
3336 kibnal_disconnect_conn (kib_conn_t *conn)
3338 static cm_drequest_data_t dreq; /* just for the space */
3341 unsigned long flags;
3343 LASSERT (!in_interrupt());
3344 LASSERT (current == kibnal_data.kib_connd);
3346 write_lock_irqsave(&kibnal_data.kib_global_lock, flags);
3348 if (conn->ibc_disconnect) {
3349 /* Had the CM callback already */
3350 write_unlock_irqrestore(&kibnal_data.kib_global_lock,
3352 kibnal_conn_disconnected(conn);
3356 LASSERT (conn->ibc_state == IBNAL_CONN_DISCONNECT1);
3358 /* active disconnect */
3359 cmrc = cm_disconnect(conn->ibc_cep, &dreq, NULL);
3360 if (cmrc == cm_stat_success) {
3361 /* waiting for CM */
3362 conn->ibc_state = IBNAL_CONN_DISCONNECT2;
3363 write_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
3367 write_unlock_irqrestore(&kibnal_data.kib_global_lock, flags);
3369 cm_cancel(conn->ibc_cep);
3370 cfs_pause(cfs_time_seconds(1)/10);
3372 if (!conn->ibc_disconnect) /* CM callback will never happen now */
3373 kibnal_conn_decref(conn);
3375 LASSERT (atomic_read(&conn->ibc_refcount) > 0);
3376 LASSERT (conn->ibc_state == IBNAL_CONN_DISCONNECT1);
3378 kibnal_conn_disconnected(conn);
3382 kibnal_connd (void *arg)
3385 unsigned long flags;
3393 unsigned long deadline = jiffies;
3395 cfs_daemonize ("kibnal_connd");
3396 cfs_block_allsigs ();
3398 init_waitqueue_entry (&wait, current);
3399 kibnal_data.kib_connd = current;
3401 spin_lock_irqsave(&kibnal_data.kib_connd_lock, flags);
3403 while (!kibnal_data.kib_shutdown) {
3407 if (!list_empty (&kibnal_data.kib_connd_zombies)) {
3408 conn = list_entry (kibnal_data.kib_connd_zombies.next,
3409 kib_conn_t, ibc_list);
3410 list_del (&conn->ibc_list);
3412 spin_unlock_irqrestore (&kibnal_data.kib_connd_lock, flags);
3415 kibnal_destroy_conn(conn);
3417 spin_lock_irqsave (&kibnal_data.kib_connd_lock, flags);
3420 if (!list_empty (&kibnal_data.kib_connd_pcreqs)) {
3421 pcr = list_entry(kibnal_data.kib_connd_pcreqs.next,
3422 kib_pcreq_t, pcr_list);
3423 list_del(&pcr->pcr_list);
3425 spin_unlock_irqrestore(&kibnal_data.kib_connd_lock, flags);
3428 kibnal_recv_connreq(pcr->pcr_cep, &pcr->pcr_cmreq);
3429 LIBCFS_FREE(pcr, sizeof(*pcr));
3431 spin_lock_irqsave(&kibnal_data.kib_connd_lock, flags);
3434 if (!list_empty (&kibnal_data.kib_connd_peers)) {
3435 peer = list_entry (kibnal_data.kib_connd_peers.next,
3436 kib_peer_t, ibp_connd_list);
3438 list_del_init (&peer->ibp_connd_list);
3439 spin_unlock_irqrestore (&kibnal_data.kib_connd_lock, flags);
3442 kibnal_arp_peer (peer);
3443 kibnal_peer_decref (peer);
3445 spin_lock_irqsave (&kibnal_data.kib_connd_lock, flags);
3448 if (!list_empty (&kibnal_data.kib_connd_conns)) {
3449 conn = list_entry (kibnal_data.kib_connd_conns.next,
3450 kib_conn_t, ibc_list);
3451 list_del (&conn->ibc_list);
3453 spin_unlock_irqrestore (&kibnal_data.kib_connd_lock, flags);
3456 switch (conn->ibc_state) {
3460 case IBNAL_CONN_ACTIVE_ARP:
3461 kibnal_arp_done(conn);
3464 case IBNAL_CONN_ACTIVE_CONNECT:
3465 kibnal_check_connreply(conn);
3468 case IBNAL_CONN_PASSIVE_WAIT:
3469 kibnal_check_passive_wait(conn);
3472 case IBNAL_CONN_DISCONNECT1:
3473 case IBNAL_CONN_DISCONNECT2:
3474 kibnal_disconnect_conn(conn);
3477 kibnal_conn_decref(conn);
3479 spin_lock_irqsave (&kibnal_data.kib_connd_lock, flags);
3482 /* careful with the jiffy wrap... */
3483 timeout = (int)(deadline - jiffies);
3487 int chunk = kibnal_data.kib_peer_hash_size;
3489 spin_unlock_irqrestore(&kibnal_data.kib_connd_lock, flags);
3492 /* Time to check for RDMA timeouts on a few more
3493 * peers: I do checks every 'p' seconds on a
3494 * proportion of the peer table and I need to check
3495 * every connection 'n' times within a timeout
3496 * interval, to ensure I detect a timeout on any
3497 * connection within (n+1)/n times the timeout
3500 if (*kibnal_tunables.kib_timeout > n * p)
3501 chunk = (chunk * n * p) /
3502 *kibnal_tunables.kib_timeout;
3506 for (i = 0; i < chunk; i++) {
3507 kibnal_check_conns (peer_index);
3508 peer_index = (peer_index + 1) %
3509 kibnal_data.kib_peer_hash_size;
3513 spin_lock_irqsave(&kibnal_data.kib_connd_lock, flags);
3519 /* Nothing to do for 'timeout' */
3520 set_current_state (TASK_INTERRUPTIBLE);
3521 add_wait_queue (&kibnal_data.kib_connd_waitq, &wait);
3522 spin_unlock_irqrestore (&kibnal_data.kib_connd_lock, flags);
3524 schedule_timeout (timeout);
3526 set_current_state (TASK_RUNNING);
3527 remove_wait_queue (&kibnal_data.kib_connd_waitq, &wait);
3528 spin_lock_irqsave (&kibnal_data.kib_connd_lock, flags);
3531 spin_unlock_irqrestore (&kibnal_data.kib_connd_lock, flags);
3533 kibnal_thread_fini ();
3538 kibnal_async_callback(vv_event_record_t ev)
3540 CERROR("type: %d, port: %d, data: "LPX64"\n",
3541 ev.event_type, ev.port_num, ev.type.data);
3545 kibnal_cq_callback (unsigned long unused_context)
3547 unsigned long flags;
3549 spin_lock_irqsave(&kibnal_data.kib_sched_lock, flags);
3550 kibnal_data.kib_ready = 1;
3551 wake_up(&kibnal_data.kib_sched_waitq);
3552 spin_unlock_irqrestore(&kibnal_data.kib_sched_lock, flags);
3556 kibnal_scheduler(void *arg)
3558 long id = (long)arg;
3564 unsigned long flags;
3569 snprintf(name, sizeof(name), "kibnal_sd_%02ld", id);
3570 cfs_daemonize(name);
3571 cfs_block_allsigs();
3573 init_waitqueue_entry(&wait, current);
3575 spin_lock_irqsave(&kibnal_data.kib_sched_lock, flags);
3577 while (!kibnal_data.kib_shutdown) {
3578 if (busy_loops++ >= IBNAL_RESCHED) {
3579 spin_unlock_irqrestore(&kibnal_data.kib_sched_lock,
3585 spin_lock_irqsave(&kibnal_data.kib_sched_lock, flags);
3588 if (kibnal_data.kib_ready &&
3589 !kibnal_data.kib_checking_cq) {
3590 /* take ownership of completion polling */
3591 kibnal_data.kib_checking_cq = 1;
3592 /* Assume I'll exhaust the CQ */
3593 kibnal_data.kib_ready = 0;
3594 spin_unlock_irqrestore(&kibnal_data.kib_sched_lock,
3597 vvrc = vv_poll_for_completion(kibnal_data.kib_hca,
3598 kibnal_data.kib_cq, &wc);
3599 if (vvrc == vv_return_err_cq_empty) {
3600 vvrc2 = vv_request_completion_notification(
3601 kibnal_data.kib_hca,
3603 vv_next_solicit_unsolicit_event);
3604 LASSERT (vvrc2 == vv_return_ok);
3607 if (vvrc == vv_return_ok &&
3608 kibnal_wreqid2type(wc.wr_id) == IBNAL_WID_RX) {
3609 rx = (kib_rx_t *)kibnal_wreqid2ptr(wc.wr_id);
3611 /* Grab the RX sequence number NOW before
3612 * anyone else can get an RX completion */
3613 rxseq = rx->rx_conn->ibc_rxseq++;
3616 spin_lock_irqsave(&kibnal_data.kib_sched_lock, flags);
3617 /* give up ownership of completion polling */
3618 kibnal_data.kib_checking_cq = 0;
3620 if (vvrc == vv_return_err_cq_empty)
3623 LASSERT (vvrc == vv_return_ok);
3624 /* Assume there's more: get another scheduler to check
3625 * while I handle this completion... */
3627 kibnal_data.kib_ready = 1;
3628 wake_up(&kibnal_data.kib_sched_waitq);
3630 spin_unlock_irqrestore(&kibnal_data.kib_sched_lock,
3633 switch (kibnal_wreqid2type(wc.wr_id)) {
3636 (kib_rx_t *)kibnal_wreqid2ptr(wc.wr_id),
3637 wc.completion_status,
3638 wc.num_bytes_transfered,
3644 (kib_tx_t *)kibnal_wreqid2ptr(wc.wr_id),
3645 wc.completion_status);
3648 case IBNAL_WID_RDMA:
3649 /* We only get RDMA completion notification if
3650 * it fails. So we just ignore them completely
3653 * 1) If an RDMA fails, all subsequent work
3654 * items, including the final SEND will fail
3655 * too, so I'm still guaranteed to notice that
3656 * this connection is hosed.
3658 * 2) It's positively dangerous to look inside
3659 * the tx descriptor obtained from an RDMA work
3660 * item. As soon as I drop the kib_sched_lock,
3661 * I give a scheduler on another CPU a chance
3662 * to get the final SEND completion, so the tx
3663 * descriptor can get freed as I inspect it. */
3664 CDEBUG(D_NETERROR, "RDMA failed: %d\n",
3665 wc.completion_status);
3672 spin_lock_irqsave(&kibnal_data.kib_sched_lock, flags);
3676 /* Nothing to do; sleep... */
3678 set_current_state(TASK_INTERRUPTIBLE);
3679 add_wait_queue_exclusive(&kibnal_data.kib_sched_waitq, &wait);
3680 spin_unlock_irqrestore(&kibnal_data.kib_sched_lock,
3685 remove_wait_queue(&kibnal_data.kib_sched_waitq, &wait);
3686 set_current_state(TASK_RUNNING);
3687 spin_lock_irqsave(&kibnal_data.kib_sched_lock, flags);
3690 spin_unlock_irqrestore(&kibnal_data.kib_sched_lock, flags);
3692 kibnal_thread_fini();