4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2015, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lnet/klnds/o2iblnd/o2iblnd_cb.c
34 * Author: Eric Barton <eric@bartonsoftware.com>
39 #define MAX_CONN_RACES_BEFORE_ABORT 20
41 static void kiblnd_peer_alive(struct kib_peer
*peer
);
42 static void kiblnd_peer_connect_failed(struct kib_peer
*peer
, int active
, int error
);
43 static void kiblnd_init_tx_msg(struct lnet_ni
*ni
, struct kib_tx
*tx
,
44 int type
, int body_nob
);
45 static int kiblnd_init_rdma(struct kib_conn
*conn
, struct kib_tx
*tx
, int type
,
46 int resid
, struct kib_rdma_desc
*dstrd
,
48 static void kiblnd_queue_tx_locked(struct kib_tx
*tx
, struct kib_conn
*conn
);
49 static void kiblnd_queue_tx(struct kib_tx
*tx
, struct kib_conn
*conn
);
50 static void kiblnd_unmap_tx(struct lnet_ni
*ni
, struct kib_tx
*tx
);
51 static void kiblnd_check_sends_locked(struct kib_conn
*conn
);
54 kiblnd_tx_done(struct lnet_ni
*ni
, struct kib_tx
*tx
)
56 struct lnet_msg
*lntmsg
[2];
57 struct kib_net
*net
= ni
->ni_data
;
62 LASSERT(!in_interrupt());
63 LASSERT(!tx
->tx_queued
); /* mustn't be queued for sending */
64 LASSERT(!tx
->tx_sending
); /* mustn't be awaiting sent callback */
65 LASSERT(!tx
->tx_waiting
); /* mustn't be awaiting peer response */
68 kiblnd_unmap_tx(ni
, tx
);
70 /* tx may have up to 2 lnet msgs to finalise */
71 lntmsg
[0] = tx
->tx_lntmsg
[0]; tx
->tx_lntmsg
[0] = NULL
;
72 lntmsg
[1] = tx
->tx_lntmsg
[1]; tx
->tx_lntmsg
[1] = NULL
;
76 LASSERT(ni
== tx
->tx_conn
->ibc_peer
->ibp_ni
);
78 kiblnd_conn_decref(tx
->tx_conn
);
85 kiblnd_pool_free_node(&tx
->tx_pool
->tpo_pool
, &tx
->tx_list
);
87 /* delay finalize until my descs have been freed */
88 for (i
= 0; i
< 2; i
++) {
92 lnet_finalize(ni
, lntmsg
[i
], rc
);
97 kiblnd_txlist_done(struct lnet_ni
*ni
, struct list_head
*txlist
, int status
)
101 while (!list_empty(txlist
)) {
102 tx
= list_entry(txlist
->next
, struct kib_tx
, tx_list
);
104 list_del(&tx
->tx_list
);
107 tx
->tx_status
= status
;
108 kiblnd_tx_done(ni
, tx
);
112 static struct kib_tx
*
113 kiblnd_get_idle_tx(struct lnet_ni
*ni
, lnet_nid_t target
)
115 struct kib_net
*net
= (struct kib_net
*)ni
->ni_data
;
116 struct list_head
*node
;
118 struct kib_tx_poolset
*tps
;
120 tps
= net
->ibn_tx_ps
[lnet_cpt_of_nid(target
)];
121 node
= kiblnd_pool_alloc_node(&tps
->tps_poolset
);
124 tx
= list_entry(node
, struct kib_tx
, tx_list
);
126 LASSERT(!tx
->tx_nwrq
);
127 LASSERT(!tx
->tx_queued
);
128 LASSERT(!tx
->tx_sending
);
129 LASSERT(!tx
->tx_waiting
);
130 LASSERT(!tx
->tx_status
);
131 LASSERT(!tx
->tx_conn
);
132 LASSERT(!tx
->tx_lntmsg
[0]);
133 LASSERT(!tx
->tx_lntmsg
[1]);
134 LASSERT(!tx
->tx_nfrags
);
140 kiblnd_drop_rx(struct kib_rx
*rx
)
142 struct kib_conn
*conn
= rx
->rx_conn
;
143 struct kib_sched_info
*sched
= conn
->ibc_sched
;
146 spin_lock_irqsave(&sched
->ibs_lock
, flags
);
147 LASSERT(conn
->ibc_nrx
> 0);
149 spin_unlock_irqrestore(&sched
->ibs_lock
, flags
);
151 kiblnd_conn_decref(conn
);
155 kiblnd_post_rx(struct kib_rx
*rx
, int credit
)
157 struct kib_conn
*conn
= rx
->rx_conn
;
158 struct kib_net
*net
= conn
->ibc_peer
->ibp_ni
->ni_data
;
159 struct ib_recv_wr
*bad_wrq
= NULL
;
163 LASSERT(!in_interrupt());
164 LASSERT(credit
== IBLND_POSTRX_NO_CREDIT
||
165 credit
== IBLND_POSTRX_PEER_CREDIT
||
166 credit
== IBLND_POSTRX_RSRVD_CREDIT
);
168 rx
->rx_sge
.lkey
= conn
->ibc_hdev
->ibh_pd
->local_dma_lkey
;
169 rx
->rx_sge
.addr
= rx
->rx_msgaddr
;
170 rx
->rx_sge
.length
= IBLND_MSG_SIZE
;
172 rx
->rx_wrq
.next
= NULL
;
173 rx
->rx_wrq
.sg_list
= &rx
->rx_sge
;
174 rx
->rx_wrq
.num_sge
= 1;
175 rx
->rx_wrq
.wr_id
= kiblnd_ptr2wreqid(rx
, IBLND_WID_RX
);
177 LASSERT(conn
->ibc_state
>= IBLND_CONN_INIT
);
178 LASSERT(rx
->rx_nob
>= 0); /* not posted */
180 if (conn
->ibc_state
> IBLND_CONN_ESTABLISHED
) {
181 kiblnd_drop_rx(rx
); /* No more posts for this rx */
185 rx
->rx_nob
= -1; /* flag posted */
187 /* NB: need an extra reference after ib_post_recv because we don't
188 * own this rx (and rx::rx_conn) anymore, LU-5678.
190 kiblnd_conn_addref(conn
);
191 rc
= ib_post_recv(conn
->ibc_cmid
->qp
, &rx
->rx_wrq
, &bad_wrq
);
193 CERROR("Can't post rx for %s: %d, bad_wrq: %p\n",
194 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
), rc
, bad_wrq
);
198 if (conn
->ibc_state
< IBLND_CONN_ESTABLISHED
) /* Initial post */
202 kiblnd_close_conn(conn
, rc
);
203 kiblnd_drop_rx(rx
); /* No more posts for this rx */
207 if (credit
== IBLND_POSTRX_NO_CREDIT
)
210 spin_lock(&conn
->ibc_lock
);
211 if (credit
== IBLND_POSTRX_PEER_CREDIT
)
212 conn
->ibc_outstanding_credits
++;
214 conn
->ibc_reserved_credits
++;
215 kiblnd_check_sends_locked(conn
);
216 spin_unlock(&conn
->ibc_lock
);
219 kiblnd_conn_decref(conn
);
223 static struct kib_tx
*
224 kiblnd_find_waiting_tx_locked(struct kib_conn
*conn
, int txtype
, __u64 cookie
)
226 struct list_head
*tmp
;
228 list_for_each(tmp
, &conn
->ibc_active_txs
) {
229 struct kib_tx
*tx
= list_entry(tmp
, struct kib_tx
, tx_list
);
231 LASSERT(!tx
->tx_queued
);
232 LASSERT(tx
->tx_sending
|| tx
->tx_waiting
);
234 if (tx
->tx_cookie
!= cookie
)
237 if (tx
->tx_waiting
&&
238 tx
->tx_msg
->ibm_type
== txtype
)
241 CWARN("Bad completion: %swaiting, type %x (wanted %x)\n",
242 tx
->tx_waiting
? "" : "NOT ",
243 tx
->tx_msg
->ibm_type
, txtype
);
249 kiblnd_handle_completion(struct kib_conn
*conn
, int txtype
, int status
, __u64 cookie
)
252 struct lnet_ni
*ni
= conn
->ibc_peer
->ibp_ni
;
255 spin_lock(&conn
->ibc_lock
);
257 tx
= kiblnd_find_waiting_tx_locked(conn
, txtype
, cookie
);
259 spin_unlock(&conn
->ibc_lock
);
261 CWARN("Unmatched completion type %x cookie %#llx from %s\n",
262 txtype
, cookie
, libcfs_nid2str(conn
->ibc_peer
->ibp_nid
));
263 kiblnd_close_conn(conn
, -EPROTO
);
267 if (!tx
->tx_status
) { /* success so far */
268 if (status
< 0) /* failed? */
269 tx
->tx_status
= status
;
270 else if (txtype
== IBLND_MSG_GET_REQ
)
271 lnet_set_reply_msg_len(ni
, tx
->tx_lntmsg
[1], status
);
276 idle
= !tx
->tx_queued
&& !tx
->tx_sending
;
278 list_del(&tx
->tx_list
);
280 spin_unlock(&conn
->ibc_lock
);
283 kiblnd_tx_done(ni
, tx
);
287 kiblnd_send_completion(struct kib_conn
*conn
, int type
, int status
, __u64 cookie
)
289 struct lnet_ni
*ni
= conn
->ibc_peer
->ibp_ni
;
290 struct kib_tx
*tx
= kiblnd_get_idle_tx(ni
, conn
->ibc_peer
->ibp_nid
);
293 CERROR("Can't get tx for completion %x for %s\n",
294 type
, libcfs_nid2str(conn
->ibc_peer
->ibp_nid
));
298 tx
->tx_msg
->ibm_u
.completion
.ibcm_status
= status
;
299 tx
->tx_msg
->ibm_u
.completion
.ibcm_cookie
= cookie
;
300 kiblnd_init_tx_msg(ni
, tx
, type
, sizeof(struct kib_completion_msg
));
302 kiblnd_queue_tx(tx
, conn
);
306 kiblnd_handle_rx(struct kib_rx
*rx
)
308 struct kib_msg
*msg
= rx
->rx_msg
;
309 struct kib_conn
*conn
= rx
->rx_conn
;
310 struct lnet_ni
*ni
= conn
->ibc_peer
->ibp_ni
;
311 int credits
= msg
->ibm_credits
;
317 LASSERT(conn
->ibc_state
>= IBLND_CONN_ESTABLISHED
);
319 CDEBUG(D_NET
, "Received %x[%d] from %s\n",
320 msg
->ibm_type
, credits
,
321 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
));
324 /* Have I received credits that will let me send? */
325 spin_lock(&conn
->ibc_lock
);
327 if (conn
->ibc_credits
+ credits
>
328 conn
->ibc_queue_depth
) {
329 rc2
= conn
->ibc_credits
;
330 spin_unlock(&conn
->ibc_lock
);
332 CERROR("Bad credits from %s: %d + %d > %d\n",
333 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
),
334 rc2
, credits
, conn
->ibc_queue_depth
);
336 kiblnd_close_conn(conn
, -EPROTO
);
337 kiblnd_post_rx(rx
, IBLND_POSTRX_NO_CREDIT
);
341 conn
->ibc_credits
+= credits
;
343 /* This ensures the credit taken by NOOP can be returned */
344 if (msg
->ibm_type
== IBLND_MSG_NOOP
&&
345 !IBLND_OOB_CAPABLE(conn
->ibc_version
)) /* v1 only */
346 conn
->ibc_outstanding_credits
++;
348 kiblnd_check_sends_locked(conn
);
349 spin_unlock(&conn
->ibc_lock
);
352 switch (msg
->ibm_type
) {
354 CERROR("Bad IBLND message type %x from %s\n",
355 msg
->ibm_type
, libcfs_nid2str(conn
->ibc_peer
->ibp_nid
));
356 post_credit
= IBLND_POSTRX_NO_CREDIT
;
361 if (IBLND_OOB_CAPABLE(conn
->ibc_version
)) {
362 post_credit
= IBLND_POSTRX_NO_CREDIT
;
366 if (credits
) /* credit already posted */
367 post_credit
= IBLND_POSTRX_NO_CREDIT
;
368 else /* a keepalive NOOP */
369 post_credit
= IBLND_POSTRX_PEER_CREDIT
;
372 case IBLND_MSG_IMMEDIATE
:
373 post_credit
= IBLND_POSTRX_DONT_POST
;
374 rc
= lnet_parse(ni
, &msg
->ibm_u
.immediate
.ibim_hdr
,
375 msg
->ibm_srcnid
, rx
, 0);
376 if (rc
< 0) /* repost on error */
377 post_credit
= IBLND_POSTRX_PEER_CREDIT
;
380 case IBLND_MSG_PUT_REQ
:
381 post_credit
= IBLND_POSTRX_DONT_POST
;
382 rc
= lnet_parse(ni
, &msg
->ibm_u
.putreq
.ibprm_hdr
,
383 msg
->ibm_srcnid
, rx
, 1);
384 if (rc
< 0) /* repost on error */
385 post_credit
= IBLND_POSTRX_PEER_CREDIT
;
388 case IBLND_MSG_PUT_NAK
:
389 CWARN("PUT_NACK from %s\n",
390 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
));
391 post_credit
= IBLND_POSTRX_RSRVD_CREDIT
;
392 kiblnd_handle_completion(conn
, IBLND_MSG_PUT_REQ
,
393 msg
->ibm_u
.completion
.ibcm_status
,
394 msg
->ibm_u
.completion
.ibcm_cookie
);
397 case IBLND_MSG_PUT_ACK
:
398 post_credit
= IBLND_POSTRX_RSRVD_CREDIT
;
400 spin_lock(&conn
->ibc_lock
);
401 tx
= kiblnd_find_waiting_tx_locked(conn
, IBLND_MSG_PUT_REQ
,
402 msg
->ibm_u
.putack
.ibpam_src_cookie
);
404 list_del(&tx
->tx_list
);
405 spin_unlock(&conn
->ibc_lock
);
408 CERROR("Unmatched PUT_ACK from %s\n",
409 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
));
414 LASSERT(tx
->tx_waiting
);
416 * CAVEAT EMPTOR: I could be racing with tx_complete, but...
417 * (a) I can overwrite tx_msg since my peer has received it!
418 * (b) tx_waiting set tells tx_complete() it's not done.
420 tx
->tx_nwrq
= 0; /* overwrite PUT_REQ */
422 rc2
= kiblnd_init_rdma(conn
, tx
, IBLND_MSG_PUT_DONE
,
423 kiblnd_rd_size(&msg
->ibm_u
.putack
.ibpam_rd
),
424 &msg
->ibm_u
.putack
.ibpam_rd
,
425 msg
->ibm_u
.putack
.ibpam_dst_cookie
);
427 CERROR("Can't setup rdma for PUT to %s: %d\n",
428 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
), rc2
);
430 spin_lock(&conn
->ibc_lock
);
431 tx
->tx_waiting
= 0; /* clear waiting and queue atomically */
432 kiblnd_queue_tx_locked(tx
, conn
);
433 spin_unlock(&conn
->ibc_lock
);
436 case IBLND_MSG_PUT_DONE
:
437 post_credit
= IBLND_POSTRX_PEER_CREDIT
;
438 kiblnd_handle_completion(conn
, IBLND_MSG_PUT_ACK
,
439 msg
->ibm_u
.completion
.ibcm_status
,
440 msg
->ibm_u
.completion
.ibcm_cookie
);
443 case IBLND_MSG_GET_REQ
:
444 post_credit
= IBLND_POSTRX_DONT_POST
;
445 rc
= lnet_parse(ni
, &msg
->ibm_u
.get
.ibgm_hdr
,
446 msg
->ibm_srcnid
, rx
, 1);
447 if (rc
< 0) /* repost on error */
448 post_credit
= IBLND_POSTRX_PEER_CREDIT
;
451 case IBLND_MSG_GET_DONE
:
452 post_credit
= IBLND_POSTRX_RSRVD_CREDIT
;
453 kiblnd_handle_completion(conn
, IBLND_MSG_GET_REQ
,
454 msg
->ibm_u
.completion
.ibcm_status
,
455 msg
->ibm_u
.completion
.ibcm_cookie
);
459 if (rc
< 0) /* protocol error */
460 kiblnd_close_conn(conn
, rc
);
462 if (post_credit
!= IBLND_POSTRX_DONT_POST
)
463 kiblnd_post_rx(rx
, post_credit
);
467 kiblnd_rx_complete(struct kib_rx
*rx
, int status
, int nob
)
469 struct kib_msg
*msg
= rx
->rx_msg
;
470 struct kib_conn
*conn
= rx
->rx_conn
;
471 struct lnet_ni
*ni
= conn
->ibc_peer
->ibp_ni
;
472 struct kib_net
*net
= ni
->ni_data
;
477 LASSERT(rx
->rx_nob
< 0); /* was posted */
478 rx
->rx_nob
= 0; /* isn't now */
480 if (conn
->ibc_state
> IBLND_CONN_ESTABLISHED
)
483 if (status
!= IB_WC_SUCCESS
) {
484 CNETERR("Rx from %s failed: %d\n",
485 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
), status
);
492 rc
= kiblnd_unpack_msg(msg
, rx
->rx_nob
);
494 CERROR("Error %d unpacking rx from %s\n",
495 rc
, libcfs_nid2str(conn
->ibc_peer
->ibp_nid
));
499 if (msg
->ibm_srcnid
!= conn
->ibc_peer
->ibp_nid
||
500 msg
->ibm_dstnid
!= ni
->ni_nid
||
501 msg
->ibm_srcstamp
!= conn
->ibc_incarnation
||
502 msg
->ibm_dststamp
!= net
->ibn_incarnation
) {
503 CERROR("Stale rx from %s\n",
504 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
));
509 /* set time last known alive */
510 kiblnd_peer_alive(conn
->ibc_peer
);
512 /* racing with connection establishment/teardown! */
514 if (conn
->ibc_state
< IBLND_CONN_ESTABLISHED
) {
515 rwlock_t
*g_lock
= &kiblnd_data
.kib_global_lock
;
518 write_lock_irqsave(g_lock
, flags
);
519 /* must check holding global lock to eliminate race */
520 if (conn
->ibc_state
< IBLND_CONN_ESTABLISHED
) {
521 list_add_tail(&rx
->rx_list
, &conn
->ibc_early_rxs
);
522 write_unlock_irqrestore(g_lock
, flags
);
525 write_unlock_irqrestore(g_lock
, flags
);
527 kiblnd_handle_rx(rx
);
531 CDEBUG(D_NET
, "rx %p conn %p\n", rx
, conn
);
532 kiblnd_close_conn(conn
, err
);
534 kiblnd_drop_rx(rx
); /* Don't re-post rx. */
538 kiblnd_kvaddr_to_page(unsigned long vaddr
)
542 if (is_vmalloc_addr((void *)vaddr
)) {
543 page
= vmalloc_to_page((void *)vaddr
);
547 #ifdef CONFIG_HIGHMEM
548 if (vaddr
>= PKMAP_BASE
&&
549 vaddr
< (PKMAP_BASE
+ LAST_PKMAP
* PAGE_SIZE
)) {
550 /* No highmem pages only used for bulk (kiov) I/O */
551 CERROR("find page for address in highmem\n");
555 page
= virt_to_page(vaddr
);
561 kiblnd_fmr_map_tx(struct kib_net
*net
, struct kib_tx
*tx
, struct kib_rdma_desc
*rd
, __u32 nob
)
563 struct kib_hca_dev
*hdev
;
564 struct kib_fmr_poolset
*fps
;
568 LASSERT(tx
->tx_pool
);
569 LASSERT(tx
->tx_pool
->tpo_pool
.po_owner
);
571 hdev
= tx
->tx_pool
->tpo_hdev
;
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
, tx
, rd
, nob
, 0, &tx
->fmr
);
577 CERROR("Can't map %u bytes: %d\n", nob
, rc
);
582 * If rd is not tx_rd, it's going to get sent to a peer, who will need
585 rd
->rd_key
= tx
->fmr
.fmr_key
;
586 rd
->rd_frags
[0].rf_addr
&= ~hdev
->ibh_page_mask
;
587 rd
->rd_frags
[0].rf_nob
= nob
;
593 static void kiblnd_unmap_tx(struct lnet_ni
*ni
, struct kib_tx
*tx
)
595 struct kib_net
*net
= ni
->ni_data
;
600 kiblnd_fmr_pool_unmap(&tx
->fmr
, tx
->tx_status
);
603 kiblnd_dma_unmap_sg(tx
->tx_pool
->tpo_hdev
->ibh_ibdev
,
604 tx
->tx_frags
, tx
->tx_nfrags
, tx
->tx_dmadir
);
609 static int kiblnd_map_tx(struct lnet_ni
*ni
, struct kib_tx
*tx
,
610 struct kib_rdma_desc
*rd
, int nfrags
)
612 struct kib_net
*net
= ni
->ni_data
;
613 struct kib_hca_dev
*hdev
= net
->ibn_dev
->ibd_hdev
;
618 * If rd is not tx_rd, it's going to get sent to a peer and I'm the
621 tx
->tx_dmadir
= (rd
!= tx
->tx_rd
) ? DMA_FROM_DEVICE
: DMA_TO_DEVICE
;
622 tx
->tx_nfrags
= nfrags
;
624 rd
->rd_nfrags
= kiblnd_dma_map_sg(hdev
->ibh_ibdev
, tx
->tx_frags
,
625 tx
->tx_nfrags
, tx
->tx_dmadir
);
627 for (i
= 0, nob
= 0; i
< rd
->rd_nfrags
; i
++) {
628 rd
->rd_frags
[i
].rf_nob
= kiblnd_sg_dma_len(
629 hdev
->ibh_ibdev
, &tx
->tx_frags
[i
]);
630 rd
->rd_frags
[i
].rf_addr
= kiblnd_sg_dma_address(
631 hdev
->ibh_ibdev
, &tx
->tx_frags
[i
]);
632 nob
+= rd
->rd_frags
[i
].rf_nob
;
636 return kiblnd_fmr_map_tx(net
, tx
, rd
, nob
);
642 kiblnd_setup_rd_iov(struct lnet_ni
*ni
, struct kib_tx
*tx
,
643 struct kib_rdma_desc
*rd
, unsigned int niov
,
644 const struct kvec
*iov
, int offset
, int nob
)
646 struct kib_net
*net
= ni
->ni_data
;
648 struct scatterlist
*sg
;
657 while (offset
>= iov
->iov_len
) {
658 offset
-= iov
->iov_len
;
668 vaddr
= ((unsigned long)iov
->iov_base
) + offset
;
669 page_offset
= vaddr
& (PAGE_SIZE
- 1);
670 page
= kiblnd_kvaddr_to_page(vaddr
);
672 CERROR("Can't find page\n");
676 fragnob
= min((int)(iov
->iov_len
- offset
), nob
);
677 fragnob
= min(fragnob
, (int)PAGE_SIZE
- page_offset
);
679 sg_set_page(sg
, page
, fragnob
, page_offset
);
682 CERROR("lacking enough sg entries to map tx\n");
686 if (offset
+ fragnob
< iov
->iov_len
) {
696 return kiblnd_map_tx(ni
, tx
, rd
, sg
- tx
->tx_frags
);
700 kiblnd_setup_rd_kiov(struct lnet_ni
*ni
, struct kib_tx
*tx
,
701 struct kib_rdma_desc
*rd
, int nkiov
,
702 const struct bio_vec
*kiov
, int offset
, int nob
)
704 struct kib_net
*net
= ni
->ni_data
;
705 struct scatterlist
*sg
;
708 CDEBUG(D_NET
, "niov %d offset %d nob %d\n", nkiov
, offset
, nob
);
714 while (offset
>= kiov
->bv_len
) {
715 offset
-= kiov
->bv_len
;
725 fragnob
= min((int)(kiov
->bv_len
- offset
), nob
);
727 sg_set_page(sg
, kiov
->bv_page
, fragnob
,
728 kiov
->bv_offset
+ offset
);
731 CERROR("lacking enough sg entries to map tx\n");
741 return kiblnd_map_tx(ni
, tx
, rd
, sg
- tx
->tx_frags
);
745 kiblnd_post_tx_locked(struct kib_conn
*conn
, struct kib_tx
*tx
, int credit
)
746 __must_hold(&conn
->ibc_lock
)
748 struct kib_msg
*msg
= tx
->tx_msg
;
749 struct kib_peer
*peer
= conn
->ibc_peer
;
750 struct lnet_ni
*ni
= peer
->ibp_ni
;
751 int ver
= conn
->ibc_version
;
755 LASSERT(tx
->tx_queued
);
756 /* We rely on this for QP sizing */
757 LASSERT(tx
->tx_nwrq
> 0);
759 LASSERT(!credit
|| credit
== 1);
760 LASSERT(conn
->ibc_outstanding_credits
>= 0);
761 LASSERT(conn
->ibc_outstanding_credits
<= conn
->ibc_queue_depth
);
762 LASSERT(conn
->ibc_credits
>= 0);
763 LASSERT(conn
->ibc_credits
<= conn
->ibc_queue_depth
);
765 if (conn
->ibc_nsends_posted
== kiblnd_concurrent_sends(ver
, ni
)) {
766 /* tx completions outstanding... */
767 CDEBUG(D_NET
, "%s: posted enough\n",
768 libcfs_nid2str(peer
->ibp_nid
));
772 if (credit
&& !conn
->ibc_credits
) { /* no credits */
773 CDEBUG(D_NET
, "%s: no credits\n",
774 libcfs_nid2str(peer
->ibp_nid
));
778 if (credit
&& !IBLND_OOB_CAPABLE(ver
) &&
779 conn
->ibc_credits
== 1 && /* last credit reserved */
780 msg
->ibm_type
!= IBLND_MSG_NOOP
) { /* for NOOP */
781 CDEBUG(D_NET
, "%s: not using last credit\n",
782 libcfs_nid2str(peer
->ibp_nid
));
786 /* NB don't drop ibc_lock before bumping tx_sending */
787 list_del(&tx
->tx_list
);
790 if (msg
->ibm_type
== IBLND_MSG_NOOP
&&
791 (!kiblnd_need_noop(conn
) || /* redundant NOOP */
792 (IBLND_OOB_CAPABLE(ver
) && /* posted enough NOOP */
793 conn
->ibc_noops_posted
== IBLND_OOB_MSGS(ver
)))) {
795 * OK to drop when posted enough NOOPs, since
796 * kiblnd_check_sends_locked will queue NOOP again when
797 * posted NOOPs complete
799 spin_unlock(&conn
->ibc_lock
);
800 kiblnd_tx_done(peer
->ibp_ni
, tx
);
801 spin_lock(&conn
->ibc_lock
);
802 CDEBUG(D_NET
, "%s(%d): redundant or enough NOOP\n",
803 libcfs_nid2str(peer
->ibp_nid
),
804 conn
->ibc_noops_posted
);
808 kiblnd_pack_msg(peer
->ibp_ni
, msg
, ver
, conn
->ibc_outstanding_credits
,
809 peer
->ibp_nid
, conn
->ibc_incarnation
);
811 conn
->ibc_credits
-= credit
;
812 conn
->ibc_outstanding_credits
= 0;
813 conn
->ibc_nsends_posted
++;
814 if (msg
->ibm_type
== IBLND_MSG_NOOP
)
815 conn
->ibc_noops_posted
++;
818 * CAVEAT EMPTOR! This tx could be the PUT_DONE of an RDMA
819 * PUT. If so, it was first queued here as a PUT_REQ, sent and
820 * stashed on ibc_active_txs, matched by an incoming PUT_ACK,
821 * and then re-queued here. It's (just) possible that
822 * tx_sending is non-zero if we've not done the tx_complete()
823 * from the first send; hence the ++ rather than = below.
826 list_add(&tx
->tx_list
, &conn
->ibc_active_txs
);
828 /* I'm still holding ibc_lock! */
829 if (conn
->ibc_state
!= IBLND_CONN_ESTABLISHED
) {
831 } else if (tx
->tx_pool
->tpo_pool
.po_failed
||
832 conn
->ibc_hdev
!= tx
->tx_pool
->tpo_hdev
) {
833 /* close_conn will launch failover */
836 struct kib_fast_reg_descriptor
*frd
= tx
->fmr
.fmr_frd
;
837 struct ib_send_wr
*bad
= &tx
->tx_wrq
[tx
->tx_nwrq
- 1].wr
;
838 struct ib_send_wr
*wrq
= &tx
->tx_wrq
[0].wr
;
841 if (!frd
->frd_valid
) {
842 wrq
= &frd
->frd_inv_wr
;
843 wrq
->next
= &frd
->frd_fastreg_wr
.wr
;
845 wrq
= &frd
->frd_fastreg_wr
.wr
;
847 frd
->frd_fastreg_wr
.wr
.next
= &tx
->tx_wrq
[0].wr
;
850 LASSERTF(bad
->wr_id
== kiblnd_ptr2wreqid(tx
, IBLND_WID_TX
),
851 "bad wr_id %llx, opc %d, flags %d, peer: %s\n",
852 bad
->wr_id
, bad
->opcode
, bad
->send_flags
,
853 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
));
855 rc
= ib_post_send(conn
->ibc_cmid
->qp
, wrq
, &bad
);
858 conn
->ibc_last_send
= jiffies
;
864 * NB credits are transferred in the actual
865 * message, which can only be the last work item
867 conn
->ibc_credits
+= credit
;
868 conn
->ibc_outstanding_credits
+= msg
->ibm_credits
;
869 conn
->ibc_nsends_posted
--;
870 if (msg
->ibm_type
== IBLND_MSG_NOOP
)
871 conn
->ibc_noops_posted
--;
877 done
= !tx
->tx_sending
;
879 list_del(&tx
->tx_list
);
881 spin_unlock(&conn
->ibc_lock
);
883 if (conn
->ibc_state
== IBLND_CONN_ESTABLISHED
)
884 CERROR("Error %d posting transmit to %s\n",
885 rc
, libcfs_nid2str(peer
->ibp_nid
));
887 CDEBUG(D_NET
, "Error %d posting transmit to %s\n",
888 rc
, libcfs_nid2str(peer
->ibp_nid
));
890 kiblnd_close_conn(conn
, rc
);
893 kiblnd_tx_done(peer
->ibp_ni
, tx
);
895 spin_lock(&conn
->ibc_lock
);
901 kiblnd_check_sends_locked(struct kib_conn
*conn
)
903 int ver
= conn
->ibc_version
;
904 struct lnet_ni
*ni
= conn
->ibc_peer
->ibp_ni
;
907 /* Don't send anything until after the connection is established */
908 if (conn
->ibc_state
< IBLND_CONN_ESTABLISHED
) {
909 CDEBUG(D_NET
, "%s too soon\n",
910 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
));
914 LASSERT(conn
->ibc_nsends_posted
<= kiblnd_concurrent_sends(ver
, ni
));
915 LASSERT(!IBLND_OOB_CAPABLE(ver
) ||
916 conn
->ibc_noops_posted
<= IBLND_OOB_MSGS(ver
));
917 LASSERT(conn
->ibc_reserved_credits
>= 0);
919 while (conn
->ibc_reserved_credits
> 0 &&
920 !list_empty(&conn
->ibc_tx_queue_rsrvd
)) {
921 tx
= list_entry(conn
->ibc_tx_queue_rsrvd
.next
,
922 struct kib_tx
, tx_list
);
923 list_del(&tx
->tx_list
);
924 list_add_tail(&tx
->tx_list
, &conn
->ibc_tx_queue
);
925 conn
->ibc_reserved_credits
--;
928 if (kiblnd_need_noop(conn
)) {
929 spin_unlock(&conn
->ibc_lock
);
931 tx
= kiblnd_get_idle_tx(ni
, conn
->ibc_peer
->ibp_nid
);
933 kiblnd_init_tx_msg(ni
, tx
, IBLND_MSG_NOOP
, 0);
935 spin_lock(&conn
->ibc_lock
);
937 kiblnd_queue_tx_locked(tx
, conn
);
943 if (!list_empty(&conn
->ibc_tx_queue_nocred
)) {
945 tx
= list_entry(conn
->ibc_tx_queue_nocred
.next
,
946 struct kib_tx
, tx_list
);
947 } else if (!list_empty(&conn
->ibc_tx_noops
)) {
948 LASSERT(!IBLND_OOB_CAPABLE(ver
));
950 tx
= list_entry(conn
->ibc_tx_noops
.next
,
951 struct kib_tx
, tx_list
);
952 } else if (!list_empty(&conn
->ibc_tx_queue
)) {
954 tx
= list_entry(conn
->ibc_tx_queue
.next
,
955 struct kib_tx
, tx_list
);
960 if (kiblnd_post_tx_locked(conn
, tx
, credit
))
966 kiblnd_tx_complete(struct kib_tx
*tx
, int status
)
968 int failed
= (status
!= IB_WC_SUCCESS
);
969 struct kib_conn
*conn
= tx
->tx_conn
;
972 LASSERT(tx
->tx_sending
> 0);
975 if (conn
->ibc_state
== IBLND_CONN_ESTABLISHED
)
976 CNETERR("Tx -> %s cookie %#llx sending %d waiting %d: failed %d\n",
977 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
),
978 tx
->tx_cookie
, tx
->tx_sending
, tx
->tx_waiting
,
981 kiblnd_close_conn(conn
, -EIO
);
983 kiblnd_peer_alive(conn
->ibc_peer
);
986 spin_lock(&conn
->ibc_lock
);
989 * I could be racing with rdma completion. Whoever makes 'tx' idle
990 * gets to free it, which also drops its ref on 'conn'.
993 conn
->ibc_nsends_posted
--;
994 if (tx
->tx_msg
->ibm_type
== IBLND_MSG_NOOP
)
995 conn
->ibc_noops_posted
--;
998 tx
->tx_waiting
= 0; /* don't wait for peer */
999 tx
->tx_status
= -EIO
;
1002 idle
= !tx
->tx_sending
&& /* This is the final callback */
1003 !tx
->tx_waiting
&& /* Not waiting for peer */
1004 !tx
->tx_queued
; /* Not re-queued (PUT_DONE) */
1006 list_del(&tx
->tx_list
);
1008 kiblnd_check_sends_locked(conn
);
1009 spin_unlock(&conn
->ibc_lock
);
1012 kiblnd_tx_done(conn
->ibc_peer
->ibp_ni
, tx
);
1016 kiblnd_init_tx_msg(struct lnet_ni
*ni
, struct kib_tx
*tx
, int type
,
1019 struct kib_hca_dev
*hdev
= tx
->tx_pool
->tpo_hdev
;
1020 struct ib_sge
*sge
= &tx
->tx_sge
[tx
->tx_nwrq
];
1021 struct ib_rdma_wr
*wrq
= &tx
->tx_wrq
[tx
->tx_nwrq
];
1022 int nob
= offsetof(struct kib_msg
, ibm_u
) + body_nob
;
1024 LASSERT(tx
->tx_nwrq
>= 0);
1025 LASSERT(tx
->tx_nwrq
< IBLND_MAX_RDMA_FRAGS
+ 1);
1026 LASSERT(nob
<= IBLND_MSG_SIZE
);
1028 kiblnd_init_msg(tx
->tx_msg
, type
, body_nob
);
1030 sge
->lkey
= hdev
->ibh_pd
->local_dma_lkey
;
1031 sge
->addr
= tx
->tx_msgaddr
;
1034 memset(wrq
, 0, sizeof(*wrq
));
1036 wrq
->wr
.next
= NULL
;
1037 wrq
->wr
.wr_id
= kiblnd_ptr2wreqid(tx
, IBLND_WID_TX
);
1038 wrq
->wr
.sg_list
= sge
;
1039 wrq
->wr
.num_sge
= 1;
1040 wrq
->wr
.opcode
= IB_WR_SEND
;
1041 wrq
->wr
.send_flags
= IB_SEND_SIGNALED
;
1047 kiblnd_init_rdma(struct kib_conn
*conn
, struct kib_tx
*tx
, int type
,
1048 int resid
, struct kib_rdma_desc
*dstrd
, __u64 dstcookie
)
1050 struct kib_msg
*ibmsg
= tx
->tx_msg
;
1051 struct kib_rdma_desc
*srcrd
= tx
->tx_rd
;
1052 struct ib_sge
*sge
= &tx
->tx_sge
[0];
1053 struct ib_rdma_wr
*wrq
, *next
;
1059 LASSERT(!in_interrupt());
1060 LASSERT(!tx
->tx_nwrq
);
1061 LASSERT(type
== IBLND_MSG_GET_DONE
||
1062 type
== IBLND_MSG_PUT_DONE
);
1064 if (kiblnd_rd_size(srcrd
) > conn
->ibc_max_frags
<< PAGE_SHIFT
) {
1065 CERROR("RDMA is too large for peer %s (%d), src size: %d dst size: %d\n",
1066 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
),
1067 conn
->ibc_max_frags
<< PAGE_SHIFT
,
1068 kiblnd_rd_size(srcrd
), kiblnd_rd_size(dstrd
));
1074 if (srcidx
>= srcrd
->rd_nfrags
) {
1075 CERROR("Src buffer exhausted: %d frags\n", srcidx
);
1080 if (dstidx
== dstrd
->rd_nfrags
) {
1081 CERROR("Dst buffer exhausted: %d frags\n", dstidx
);
1086 if (tx
->tx_nwrq
>= IBLND_MAX_RDMA_FRAGS
) {
1087 CERROR("RDMA has too many fragments for peer %s (%d), src idx/frags: %d/%d dst idx/frags: %d/%d\n",
1088 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
),
1089 IBLND_MAX_RDMA_FRAGS
,
1090 srcidx
, srcrd
->rd_nfrags
,
1091 dstidx
, dstrd
->rd_nfrags
);
1096 wrknob
= min3(kiblnd_rd_frag_size(srcrd
, srcidx
),
1097 kiblnd_rd_frag_size(dstrd
, dstidx
),
1100 sge
= &tx
->tx_sge
[tx
->tx_nwrq
];
1101 sge
->addr
= kiblnd_rd_frag_addr(srcrd
, srcidx
);
1102 sge
->lkey
= kiblnd_rd_frag_key(srcrd
, srcidx
);
1103 sge
->length
= wrknob
;
1105 wrq
= &tx
->tx_wrq
[tx
->tx_nwrq
];
1108 wrq
->wr
.next
= &next
->wr
;
1109 wrq
->wr
.wr_id
= kiblnd_ptr2wreqid(tx
, IBLND_WID_RDMA
);
1110 wrq
->wr
.sg_list
= sge
;
1111 wrq
->wr
.num_sge
= 1;
1112 wrq
->wr
.opcode
= IB_WR_RDMA_WRITE
;
1113 wrq
->wr
.send_flags
= 0;
1115 wrq
->remote_addr
= kiblnd_rd_frag_addr(dstrd
, dstidx
);
1116 wrq
->rkey
= kiblnd_rd_frag_key(dstrd
, dstidx
);
1118 srcidx
= kiblnd_rd_consume_frag(srcrd
, srcidx
, wrknob
);
1119 dstidx
= kiblnd_rd_consume_frag(dstrd
, dstidx
, wrknob
);
1128 if (rc
< 0) /* no RDMA if completing with failure */
1131 ibmsg
->ibm_u
.completion
.ibcm_status
= rc
;
1132 ibmsg
->ibm_u
.completion
.ibcm_cookie
= dstcookie
;
1133 kiblnd_init_tx_msg(conn
->ibc_peer
->ibp_ni
, tx
,
1134 type
, sizeof(struct kib_completion_msg
));
1140 kiblnd_queue_tx_locked(struct kib_tx
*tx
, struct kib_conn
*conn
)
1142 struct list_head
*q
;
1144 LASSERT(tx
->tx_nwrq
> 0); /* work items set up */
1145 LASSERT(!tx
->tx_queued
); /* not queued for sending already */
1146 LASSERT(conn
->ibc_state
>= IBLND_CONN_ESTABLISHED
);
1149 tx
->tx_deadline
= jiffies
+
1150 msecs_to_jiffies(*kiblnd_tunables
.kib_timeout
*
1154 kiblnd_conn_addref(conn
);
1156 LASSERT(tx
->tx_msg
->ibm_type
!= IBLND_MSG_PUT_DONE
);
1158 /* PUT_DONE first attached to conn as a PUT_REQ */
1159 LASSERT(tx
->tx_conn
== conn
);
1160 LASSERT(tx
->tx_msg
->ibm_type
== IBLND_MSG_PUT_DONE
);
1163 switch (tx
->tx_msg
->ibm_type
) {
1167 case IBLND_MSG_PUT_REQ
:
1168 case IBLND_MSG_GET_REQ
:
1169 q
= &conn
->ibc_tx_queue_rsrvd
;
1172 case IBLND_MSG_PUT_NAK
:
1173 case IBLND_MSG_PUT_ACK
:
1174 case IBLND_MSG_PUT_DONE
:
1175 case IBLND_MSG_GET_DONE
:
1176 q
= &conn
->ibc_tx_queue_nocred
;
1179 case IBLND_MSG_NOOP
:
1180 if (IBLND_OOB_CAPABLE(conn
->ibc_version
))
1181 q
= &conn
->ibc_tx_queue_nocred
;
1183 q
= &conn
->ibc_tx_noops
;
1186 case IBLND_MSG_IMMEDIATE
:
1187 q
= &conn
->ibc_tx_queue
;
1191 list_add_tail(&tx
->tx_list
, q
);
1195 kiblnd_queue_tx(struct kib_tx
*tx
, struct kib_conn
*conn
)
1197 spin_lock(&conn
->ibc_lock
);
1198 kiblnd_queue_tx_locked(tx
, conn
);
1199 kiblnd_check_sends_locked(conn
);
1200 spin_unlock(&conn
->ibc_lock
);
1203 static int kiblnd_resolve_addr(struct rdma_cm_id
*cmid
,
1204 struct sockaddr_in
*srcaddr
,
1205 struct sockaddr_in
*dstaddr
,
1208 unsigned short port
;
1211 /* allow the port to be reused */
1212 rc
= rdma_set_reuseaddr(cmid
, 1);
1214 CERROR("Unable to set reuse on cmid: %d\n", rc
);
1218 /* look for a free privileged port */
1219 for (port
= PROT_SOCK
- 1; port
> 0; port
--) {
1220 srcaddr
->sin_port
= htons(port
);
1221 rc
= rdma_resolve_addr(cmid
,
1222 (struct sockaddr
*)srcaddr
,
1223 (struct sockaddr
*)dstaddr
,
1226 CDEBUG(D_NET
, "bound to port %hu\n", port
);
1228 } else if (rc
== -EADDRINUSE
|| rc
== -EADDRNOTAVAIL
) {
1229 CDEBUG(D_NET
, "bind to port %hu failed: %d\n",
1236 CERROR("Failed to bind to a free privileged port\n");
1241 kiblnd_connect_peer(struct kib_peer
*peer
)
1243 struct rdma_cm_id
*cmid
;
1244 struct kib_dev
*dev
;
1245 struct kib_net
*net
= peer
->ibp_ni
->ni_data
;
1246 struct sockaddr_in srcaddr
;
1247 struct sockaddr_in dstaddr
;
1251 LASSERT(peer
->ibp_connecting
> 0);
1252 LASSERT(!peer
->ibp_reconnecting
);
1254 cmid
= kiblnd_rdma_create_id(kiblnd_cm_callback
, peer
, RDMA_PS_TCP
,
1258 CERROR("Can't create CMID for %s: %ld\n",
1259 libcfs_nid2str(peer
->ibp_nid
), PTR_ERR(cmid
));
1265 memset(&srcaddr
, 0, sizeof(srcaddr
));
1266 srcaddr
.sin_family
= AF_INET
;
1267 srcaddr
.sin_addr
.s_addr
= htonl(dev
->ibd_ifip
);
1269 memset(&dstaddr
, 0, sizeof(dstaddr
));
1270 dstaddr
.sin_family
= AF_INET
;
1271 dstaddr
.sin_port
= htons(*kiblnd_tunables
.kib_service
);
1272 dstaddr
.sin_addr
.s_addr
= htonl(LNET_NIDADDR(peer
->ibp_nid
));
1274 kiblnd_peer_addref(peer
); /* cmid's ref */
1276 if (*kiblnd_tunables
.kib_use_priv_port
) {
1277 rc
= kiblnd_resolve_addr(cmid
, &srcaddr
, &dstaddr
,
1278 *kiblnd_tunables
.kib_timeout
* 1000);
1280 rc
= rdma_resolve_addr(cmid
,
1281 (struct sockaddr
*)&srcaddr
,
1282 (struct sockaddr
*)&dstaddr
,
1283 *kiblnd_tunables
.kib_timeout
* 1000);
1286 /* Can't initiate address resolution: */
1287 CERROR("Can't resolve addr for %s: %d\n",
1288 libcfs_nid2str(peer
->ibp_nid
), rc
);
1292 LASSERT(cmid
->device
);
1293 CDEBUG(D_NET
, "%s: connection bound to %s:%pI4h:%s\n",
1294 libcfs_nid2str(peer
->ibp_nid
), dev
->ibd_ifname
,
1295 &dev
->ibd_ifip
, cmid
->device
->name
);
1300 kiblnd_peer_connect_failed(peer
, 1, rc
);
1301 kiblnd_peer_decref(peer
); /* cmid's ref */
1302 rdma_destroy_id(cmid
);
1305 kiblnd_peer_connect_failed(peer
, 1, rc
);
1309 kiblnd_reconnect_peer(struct kib_peer
*peer
)
1311 rwlock_t
*glock
= &kiblnd_data
.kib_global_lock
;
1312 char *reason
= NULL
;
1313 struct list_head txs
;
1314 unsigned long flags
;
1316 INIT_LIST_HEAD(&txs
);
1318 write_lock_irqsave(glock
, flags
);
1319 if (!peer
->ibp_reconnecting
) {
1320 if (peer
->ibp_accepting
)
1321 reason
= "accepting";
1322 else if (peer
->ibp_connecting
)
1323 reason
= "connecting";
1324 else if (!list_empty(&peer
->ibp_conns
))
1325 reason
= "connected";
1326 else /* connected then closed */
1332 LASSERT(!peer
->ibp_accepting
&& !peer
->ibp_connecting
&&
1333 list_empty(&peer
->ibp_conns
));
1334 peer
->ibp_reconnecting
= 0;
1336 if (!kiblnd_peer_active(peer
)) {
1337 list_splice_init(&peer
->ibp_tx_queue
, &txs
);
1338 reason
= "unlinked";
1342 peer
->ibp_connecting
++;
1343 peer
->ibp_reconnected
++;
1344 write_unlock_irqrestore(glock
, flags
);
1346 kiblnd_connect_peer(peer
);
1350 write_unlock_irqrestore(glock
, flags
);
1352 CWARN("Abort reconnection of %s: %s\n",
1353 libcfs_nid2str(peer
->ibp_nid
), reason
);
1354 kiblnd_txlist_done(peer
->ibp_ni
, &txs
, -ECONNABORTED
);
1359 kiblnd_launch_tx(struct lnet_ni
*ni
, struct kib_tx
*tx
, lnet_nid_t nid
)
1361 struct kib_peer
*peer
;
1362 struct kib_peer
*peer2
;
1363 struct kib_conn
*conn
;
1364 rwlock_t
*g_lock
= &kiblnd_data
.kib_global_lock
;
1365 unsigned long flags
;
1369 * If I get here, I've committed to send, so I complete the tx with
1370 * failure on any problems
1372 LASSERT(!tx
|| !tx
->tx_conn
); /* only set when assigned a conn */
1373 LASSERT(!tx
|| tx
->tx_nwrq
> 0); /* work items have been set up */
1376 * First time, just use a read lock since I expect to find my peer
1379 read_lock_irqsave(g_lock
, flags
);
1381 peer
= kiblnd_find_peer_locked(nid
);
1382 if (peer
&& !list_empty(&peer
->ibp_conns
)) {
1383 /* Found a peer with an established connection */
1384 conn
= kiblnd_get_conn_locked(peer
);
1385 kiblnd_conn_addref(conn
); /* 1 ref for me... */
1387 read_unlock_irqrestore(g_lock
, flags
);
1390 kiblnd_queue_tx(tx
, conn
);
1391 kiblnd_conn_decref(conn
); /* ...to here */
1395 read_unlock(g_lock
);
1396 /* Re-try with a write lock */
1399 peer
= kiblnd_find_peer_locked(nid
);
1401 if (list_empty(&peer
->ibp_conns
)) {
1402 /* found a peer, but it's still connecting... */
1403 LASSERT(kiblnd_peer_connecting(peer
));
1405 list_add_tail(&tx
->tx_list
,
1406 &peer
->ibp_tx_queue
);
1407 write_unlock_irqrestore(g_lock
, flags
);
1409 conn
= kiblnd_get_conn_locked(peer
);
1410 kiblnd_conn_addref(conn
); /* 1 ref for me... */
1412 write_unlock_irqrestore(g_lock
, flags
);
1415 kiblnd_queue_tx(tx
, conn
);
1416 kiblnd_conn_decref(conn
); /* ...to here */
1421 write_unlock_irqrestore(g_lock
, flags
);
1423 /* Allocate a peer ready to add to the peer table and retry */
1424 rc
= kiblnd_create_peer(ni
, &peer
, nid
);
1426 CERROR("Can't create peer %s\n", libcfs_nid2str(nid
));
1428 tx
->tx_status
= -EHOSTUNREACH
;
1430 kiblnd_tx_done(ni
, tx
);
1435 write_lock_irqsave(g_lock
, flags
);
1437 peer2
= kiblnd_find_peer_locked(nid
);
1439 if (list_empty(&peer2
->ibp_conns
)) {
1440 /* found a peer, but it's still connecting... */
1441 LASSERT(kiblnd_peer_connecting(peer2
));
1443 list_add_tail(&tx
->tx_list
,
1444 &peer2
->ibp_tx_queue
);
1445 write_unlock_irqrestore(g_lock
, flags
);
1447 conn
= kiblnd_get_conn_locked(peer2
);
1448 kiblnd_conn_addref(conn
); /* 1 ref for me... */
1450 write_unlock_irqrestore(g_lock
, flags
);
1453 kiblnd_queue_tx(tx
, conn
);
1454 kiblnd_conn_decref(conn
); /* ...to here */
1457 kiblnd_peer_decref(peer
);
1461 /* Brand new peer */
1462 LASSERT(!peer
->ibp_connecting
);
1463 peer
->ibp_connecting
= 1;
1465 /* always called with a ref on ni, which prevents ni being shutdown */
1466 LASSERT(!((struct kib_net
*)ni
->ni_data
)->ibn_shutdown
);
1469 list_add_tail(&tx
->tx_list
, &peer
->ibp_tx_queue
);
1471 kiblnd_peer_addref(peer
);
1472 list_add_tail(&peer
->ibp_list
, kiblnd_nid2peerlist(nid
));
1474 write_unlock_irqrestore(g_lock
, flags
);
1476 kiblnd_connect_peer(peer
);
1477 kiblnd_peer_decref(peer
);
1481 kiblnd_send(struct lnet_ni
*ni
, void *private, struct lnet_msg
*lntmsg
)
1483 struct lnet_hdr
*hdr
= &lntmsg
->msg_hdr
;
1484 int type
= lntmsg
->msg_type
;
1485 struct lnet_process_id target
= lntmsg
->msg_target
;
1486 int target_is_router
= lntmsg
->msg_target_is_router
;
1487 int routing
= lntmsg
->msg_routing
;
1488 unsigned int payload_niov
= lntmsg
->msg_niov
;
1489 struct kvec
*payload_iov
= lntmsg
->msg_iov
;
1490 struct bio_vec
*payload_kiov
= lntmsg
->msg_kiov
;
1491 unsigned int payload_offset
= lntmsg
->msg_offset
;
1492 unsigned int payload_nob
= lntmsg
->msg_len
;
1493 struct iov_iter from
;
1494 struct kib_msg
*ibmsg
;
1495 struct kib_rdma_desc
*rd
;
1500 /* NB 'private' is different depending on what we're sending.... */
1502 CDEBUG(D_NET
, "sending %d bytes in %d frags to %s\n",
1503 payload_nob
, payload_niov
, libcfs_id2str(target
));
1505 LASSERT(!payload_nob
|| payload_niov
> 0);
1506 LASSERT(payload_niov
<= LNET_MAX_IOV
);
1508 /* Thread context */
1509 LASSERT(!in_interrupt());
1510 /* payload is either all vaddrs or all pages */
1511 LASSERT(!(payload_kiov
&& payload_iov
));
1514 iov_iter_bvec(&from
, ITER_BVEC
| WRITE
,
1515 payload_kiov
, payload_niov
,
1516 payload_nob
+ payload_offset
);
1518 iov_iter_kvec(&from
, ITER_KVEC
| WRITE
,
1519 payload_iov
, payload_niov
,
1520 payload_nob
+ payload_offset
);
1522 iov_iter_advance(&from
, payload_offset
);
1530 LASSERT(!payload_nob
);
1534 if (routing
|| target_is_router
)
1535 break; /* send IMMEDIATE */
1537 /* is the REPLY message too small for RDMA? */
1538 nob
= offsetof(struct kib_msg
, ibm_u
.immediate
.ibim_payload
[lntmsg
->msg_md
->md_length
]);
1539 if (nob
<= IBLND_MSG_SIZE
)
1540 break; /* send IMMEDIATE */
1542 tx
= kiblnd_get_idle_tx(ni
, target
.nid
);
1544 CERROR("Can't allocate txd for GET to %s\n",
1545 libcfs_nid2str(target
.nid
));
1550 rd
= &ibmsg
->ibm_u
.get
.ibgm_rd
;
1551 if (!(lntmsg
->msg_md
->md_options
& LNET_MD_KIOV
))
1552 rc
= kiblnd_setup_rd_iov(ni
, tx
, rd
,
1553 lntmsg
->msg_md
->md_niov
,
1554 lntmsg
->msg_md
->md_iov
.iov
,
1555 0, lntmsg
->msg_md
->md_length
);
1557 rc
= kiblnd_setup_rd_kiov(ni
, tx
, rd
,
1558 lntmsg
->msg_md
->md_niov
,
1559 lntmsg
->msg_md
->md_iov
.kiov
,
1560 0, lntmsg
->msg_md
->md_length
);
1562 CERROR("Can't setup GET sink for %s: %d\n",
1563 libcfs_nid2str(target
.nid
), rc
);
1564 kiblnd_tx_done(ni
, tx
);
1568 nob
= offsetof(struct kib_get_msg
, ibgm_rd
.rd_frags
[rd
->rd_nfrags
]);
1569 ibmsg
->ibm_u
.get
.ibgm_cookie
= tx
->tx_cookie
;
1570 ibmsg
->ibm_u
.get
.ibgm_hdr
= *hdr
;
1572 kiblnd_init_tx_msg(ni
, tx
, IBLND_MSG_GET_REQ
, nob
);
1574 tx
->tx_lntmsg
[1] = lnet_create_reply_msg(ni
, lntmsg
);
1575 if (!tx
->tx_lntmsg
[1]) {
1576 CERROR("Can't create reply for GET -> %s\n",
1577 libcfs_nid2str(target
.nid
));
1578 kiblnd_tx_done(ni
, tx
);
1582 tx
->tx_lntmsg
[0] = lntmsg
; /* finalise lntmsg[0,1] on completion */
1583 tx
->tx_waiting
= 1; /* waiting for GET_DONE */
1584 kiblnd_launch_tx(ni
, tx
, target
.nid
);
1587 case LNET_MSG_REPLY
:
1589 /* Is the payload small enough not to need RDMA? */
1590 nob
= offsetof(struct kib_msg
, ibm_u
.immediate
.ibim_payload
[payload_nob
]);
1591 if (nob
<= IBLND_MSG_SIZE
)
1592 break; /* send IMMEDIATE */
1594 tx
= kiblnd_get_idle_tx(ni
, target
.nid
);
1596 CERROR("Can't allocate %s txd for %s\n",
1597 type
== LNET_MSG_PUT
? "PUT" : "REPLY",
1598 libcfs_nid2str(target
.nid
));
1603 rc
= kiblnd_setup_rd_iov(ni
, tx
, tx
->tx_rd
,
1604 payload_niov
, payload_iov
,
1605 payload_offset
, payload_nob
);
1607 rc
= kiblnd_setup_rd_kiov(ni
, tx
, tx
->tx_rd
,
1608 payload_niov
, payload_kiov
,
1609 payload_offset
, payload_nob
);
1611 CERROR("Can't setup PUT src for %s: %d\n",
1612 libcfs_nid2str(target
.nid
), rc
);
1613 kiblnd_tx_done(ni
, tx
);
1618 ibmsg
->ibm_u
.putreq
.ibprm_hdr
= *hdr
;
1619 ibmsg
->ibm_u
.putreq
.ibprm_cookie
= tx
->tx_cookie
;
1620 kiblnd_init_tx_msg(ni
, tx
, IBLND_MSG_PUT_REQ
, sizeof(struct kib_putreq_msg
));
1622 tx
->tx_lntmsg
[0] = lntmsg
; /* finalise lntmsg on completion */
1623 tx
->tx_waiting
= 1; /* waiting for PUT_{ACK,NAK} */
1624 kiblnd_launch_tx(ni
, tx
, target
.nid
);
1628 /* send IMMEDIATE */
1630 LASSERT(offsetof(struct kib_msg
, ibm_u
.immediate
.ibim_payload
[payload_nob
])
1633 tx
= kiblnd_get_idle_tx(ni
, target
.nid
);
1635 CERROR("Can't send %d to %s: tx descs exhausted\n",
1636 type
, libcfs_nid2str(target
.nid
));
1641 ibmsg
->ibm_u
.immediate
.ibim_hdr
= *hdr
;
1643 rc
= copy_from_iter(&ibmsg
->ibm_u
.immediate
.ibim_payload
, payload_nob
,
1645 if (rc
!= payload_nob
) {
1646 kiblnd_pool_free_node(&tx
->tx_pool
->tpo_pool
, &tx
->tx_list
);
1650 nob
= offsetof(struct kib_immediate_msg
, ibim_payload
[payload_nob
]);
1651 kiblnd_init_tx_msg(ni
, tx
, IBLND_MSG_IMMEDIATE
, nob
);
1653 tx
->tx_lntmsg
[0] = lntmsg
; /* finalise lntmsg on completion */
1654 kiblnd_launch_tx(ni
, tx
, target
.nid
);
1659 kiblnd_reply(struct lnet_ni
*ni
, struct kib_rx
*rx
, struct lnet_msg
*lntmsg
)
1661 struct lnet_process_id target
= lntmsg
->msg_target
;
1662 unsigned int niov
= lntmsg
->msg_niov
;
1663 struct kvec
*iov
= lntmsg
->msg_iov
;
1664 struct bio_vec
*kiov
= lntmsg
->msg_kiov
;
1665 unsigned int offset
= lntmsg
->msg_offset
;
1666 unsigned int nob
= lntmsg
->msg_len
;
1670 tx
= kiblnd_get_idle_tx(ni
, rx
->rx_conn
->ibc_peer
->ibp_nid
);
1672 CERROR("Can't get tx for REPLY to %s\n",
1673 libcfs_nid2str(target
.nid
));
1680 rc
= kiblnd_setup_rd_iov(ni
, tx
, tx
->tx_rd
,
1681 niov
, iov
, offset
, nob
);
1683 rc
= kiblnd_setup_rd_kiov(ni
, tx
, tx
->tx_rd
,
1684 niov
, kiov
, offset
, nob
);
1687 CERROR("Can't setup GET src for %s: %d\n",
1688 libcfs_nid2str(target
.nid
), rc
);
1692 rc
= kiblnd_init_rdma(rx
->rx_conn
, tx
,
1693 IBLND_MSG_GET_DONE
, nob
,
1694 &rx
->rx_msg
->ibm_u
.get
.ibgm_rd
,
1695 rx
->rx_msg
->ibm_u
.get
.ibgm_cookie
);
1697 CERROR("Can't setup rdma for GET from %s: %d\n",
1698 libcfs_nid2str(target
.nid
), rc
);
1703 /* No RDMA: local completion may happen now! */
1704 lnet_finalize(ni
, lntmsg
, 0);
1706 /* RDMA: lnet_finalize(lntmsg) when it completes */
1707 tx
->tx_lntmsg
[0] = lntmsg
;
1710 kiblnd_queue_tx(tx
, rx
->rx_conn
);
1714 kiblnd_tx_done(ni
, tx
);
1716 lnet_finalize(ni
, lntmsg
, -EIO
);
1720 kiblnd_recv(struct lnet_ni
*ni
, void *private, struct lnet_msg
*lntmsg
,
1721 int delayed
, struct iov_iter
*to
, unsigned int rlen
)
1723 struct kib_rx
*rx
= private;
1724 struct kib_msg
*rxmsg
= rx
->rx_msg
;
1725 struct kib_conn
*conn
= rx
->rx_conn
;
1728 int post_credit
= IBLND_POSTRX_PEER_CREDIT
;
1731 LASSERT(iov_iter_count(to
) <= rlen
);
1732 LASSERT(!in_interrupt());
1733 /* Either all pages or all vaddrs */
1735 switch (rxmsg
->ibm_type
) {
1739 case IBLND_MSG_IMMEDIATE
:
1740 nob
= offsetof(struct kib_msg
, ibm_u
.immediate
.ibim_payload
[rlen
]);
1741 if (nob
> rx
->rx_nob
) {
1742 CERROR("Immediate message from %s too big: %d(%d)\n",
1743 libcfs_nid2str(rxmsg
->ibm_u
.immediate
.ibim_hdr
.src_nid
),
1749 rc
= copy_to_iter(&rxmsg
->ibm_u
.immediate
.ibim_payload
, rlen
,
1757 lnet_finalize(ni
, lntmsg
, 0);
1760 case IBLND_MSG_PUT_REQ
: {
1761 struct kib_msg
*txmsg
;
1762 struct kib_rdma_desc
*rd
;
1764 if (!iov_iter_count(to
)) {
1765 lnet_finalize(ni
, lntmsg
, 0);
1766 kiblnd_send_completion(rx
->rx_conn
, IBLND_MSG_PUT_NAK
, 0,
1767 rxmsg
->ibm_u
.putreq
.ibprm_cookie
);
1771 tx
= kiblnd_get_idle_tx(ni
, conn
->ibc_peer
->ibp_nid
);
1773 CERROR("Can't allocate tx for %s\n",
1774 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
));
1775 /* Not replying will break the connection */
1781 rd
= &txmsg
->ibm_u
.putack
.ibpam_rd
;
1782 if (!(to
->type
& ITER_BVEC
))
1783 rc
= kiblnd_setup_rd_iov(ni
, tx
, rd
,
1784 to
->nr_segs
, to
->kvec
,
1786 iov_iter_count(to
));
1788 rc
= kiblnd_setup_rd_kiov(ni
, tx
, rd
,
1789 to
->nr_segs
, to
->bvec
,
1791 iov_iter_count(to
));
1793 CERROR("Can't setup PUT sink for %s: %d\n",
1794 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
), rc
);
1795 kiblnd_tx_done(ni
, tx
);
1796 /* tell peer it's over */
1797 kiblnd_send_completion(rx
->rx_conn
, IBLND_MSG_PUT_NAK
, rc
,
1798 rxmsg
->ibm_u
.putreq
.ibprm_cookie
);
1802 nob
= offsetof(struct kib_putack_msg
, ibpam_rd
.rd_frags
[rd
->rd_nfrags
]);
1803 txmsg
->ibm_u
.putack
.ibpam_src_cookie
= rxmsg
->ibm_u
.putreq
.ibprm_cookie
;
1804 txmsg
->ibm_u
.putack
.ibpam_dst_cookie
= tx
->tx_cookie
;
1806 kiblnd_init_tx_msg(ni
, tx
, IBLND_MSG_PUT_ACK
, nob
);
1808 tx
->tx_lntmsg
[0] = lntmsg
; /* finalise lntmsg on completion */
1809 tx
->tx_waiting
= 1; /* waiting for PUT_DONE */
1810 kiblnd_queue_tx(tx
, conn
);
1812 /* reposted buffer reserved for PUT_DONE */
1813 post_credit
= IBLND_POSTRX_NO_CREDIT
;
1817 case IBLND_MSG_GET_REQ
:
1819 /* Optimized GET; RDMA lntmsg's payload */
1820 kiblnd_reply(ni
, rx
, lntmsg
);
1822 /* GET didn't match anything */
1823 kiblnd_send_completion(rx
->rx_conn
, IBLND_MSG_GET_DONE
,
1825 rxmsg
->ibm_u
.get
.ibgm_cookie
);
1830 kiblnd_post_rx(rx
, post_credit
);
1835 kiblnd_thread_start(int (*fn
)(void *arg
), void *arg
, char *name
)
1837 struct task_struct
*task
= kthread_run(fn
, arg
, "%s", name
);
1840 return PTR_ERR(task
);
1842 atomic_inc(&kiblnd_data
.kib_nthreads
);
1847 kiblnd_thread_fini(void)
1849 atomic_dec(&kiblnd_data
.kib_nthreads
);
1853 kiblnd_peer_alive(struct kib_peer
*peer
)
1855 /* This is racy, but everyone's only writing cfs_time_current() */
1856 peer
->ibp_last_alive
= cfs_time_current();
1861 kiblnd_peer_notify(struct kib_peer
*peer
)
1864 unsigned long last_alive
= 0;
1865 unsigned long flags
;
1867 read_lock_irqsave(&kiblnd_data
.kib_global_lock
, flags
);
1869 if (kiblnd_peer_idle(peer
) && peer
->ibp_error
) {
1870 error
= peer
->ibp_error
;
1871 peer
->ibp_error
= 0;
1873 last_alive
= peer
->ibp_last_alive
;
1876 read_unlock_irqrestore(&kiblnd_data
.kib_global_lock
, flags
);
1879 lnet_notify(peer
->ibp_ni
,
1880 peer
->ibp_nid
, 0, last_alive
);
1884 kiblnd_close_conn_locked(struct kib_conn
*conn
, int error
)
1887 * This just does the immediate housekeeping. 'error' is zero for a
1888 * normal shutdown which can happen only after the connection has been
1889 * established. If the connection is established, schedule the
1890 * connection to be finished off by the connd. Otherwise the connd is
1891 * already dealing with it (either to set it up or tear it down).
1892 * Caller holds kib_global_lock exclusively in irq context
1894 struct kib_peer
*peer
= conn
->ibc_peer
;
1895 struct kib_dev
*dev
;
1896 unsigned long flags
;
1898 LASSERT(error
|| conn
->ibc_state
>= IBLND_CONN_ESTABLISHED
);
1900 if (error
&& !conn
->ibc_comms_error
)
1901 conn
->ibc_comms_error
= error
;
1903 if (conn
->ibc_state
!= IBLND_CONN_ESTABLISHED
)
1904 return; /* already being handled */
1907 list_empty(&conn
->ibc_tx_noops
) &&
1908 list_empty(&conn
->ibc_tx_queue
) &&
1909 list_empty(&conn
->ibc_tx_queue_rsrvd
) &&
1910 list_empty(&conn
->ibc_tx_queue_nocred
) &&
1911 list_empty(&conn
->ibc_active_txs
)) {
1912 CDEBUG(D_NET
, "closing conn to %s\n",
1913 libcfs_nid2str(peer
->ibp_nid
));
1915 CNETERR("Closing conn to %s: error %d%s%s%s%s%s\n",
1916 libcfs_nid2str(peer
->ibp_nid
), error
,
1917 list_empty(&conn
->ibc_tx_queue
) ? "" : "(sending)",
1918 list_empty(&conn
->ibc_tx_noops
) ? "" : "(sending_noops)",
1919 list_empty(&conn
->ibc_tx_queue_rsrvd
) ? "" : "(sending_rsrvd)",
1920 list_empty(&conn
->ibc_tx_queue_nocred
) ? "" : "(sending_nocred)",
1921 list_empty(&conn
->ibc_active_txs
) ? "" : "(waiting)");
1924 dev
= ((struct kib_net
*)peer
->ibp_ni
->ni_data
)->ibn_dev
;
1925 list_del(&conn
->ibc_list
);
1926 /* connd (see below) takes over ibc_list's ref */
1928 if (list_empty(&peer
->ibp_conns
) && /* no more conns */
1929 kiblnd_peer_active(peer
)) { /* still in peer table */
1930 kiblnd_unlink_peer_locked(peer
);
1932 /* set/clear error on last conn */
1933 peer
->ibp_error
= conn
->ibc_comms_error
;
1936 kiblnd_set_conn_state(conn
, IBLND_CONN_CLOSING
);
1939 kiblnd_dev_can_failover(dev
)) {
1940 list_add_tail(&dev
->ibd_fail_list
,
1941 &kiblnd_data
.kib_failed_devs
);
1942 wake_up(&kiblnd_data
.kib_failover_waitq
);
1945 spin_lock_irqsave(&kiblnd_data
.kib_connd_lock
, flags
);
1947 list_add_tail(&conn
->ibc_list
, &kiblnd_data
.kib_connd_conns
);
1948 wake_up(&kiblnd_data
.kib_connd_waitq
);
1950 spin_unlock_irqrestore(&kiblnd_data
.kib_connd_lock
, flags
);
1954 kiblnd_close_conn(struct kib_conn
*conn
, int error
)
1956 unsigned long flags
;
1958 write_lock_irqsave(&kiblnd_data
.kib_global_lock
, flags
);
1960 kiblnd_close_conn_locked(conn
, error
);
1962 write_unlock_irqrestore(&kiblnd_data
.kib_global_lock
, flags
);
1966 kiblnd_handle_early_rxs(struct kib_conn
*conn
)
1968 unsigned long flags
;
1972 LASSERT(!in_interrupt());
1973 LASSERT(conn
->ibc_state
>= IBLND_CONN_ESTABLISHED
);
1975 write_lock_irqsave(&kiblnd_data
.kib_global_lock
, flags
);
1976 list_for_each_entry_safe(rx
, tmp
, &conn
->ibc_early_rxs
, rx_list
) {
1977 list_del(&rx
->rx_list
);
1978 write_unlock_irqrestore(&kiblnd_data
.kib_global_lock
, flags
);
1980 kiblnd_handle_rx(rx
);
1982 write_lock_irqsave(&kiblnd_data
.kib_global_lock
, flags
);
1984 write_unlock_irqrestore(&kiblnd_data
.kib_global_lock
, flags
);
1988 kiblnd_abort_txs(struct kib_conn
*conn
, struct list_head
*txs
)
1991 struct list_head
*tmp
;
1992 struct list_head
*nxt
;
1995 spin_lock(&conn
->ibc_lock
);
1997 list_for_each_safe(tmp
, nxt
, txs
) {
1998 tx
= list_entry(tmp
, struct kib_tx
, tx_list
);
2000 if (txs
== &conn
->ibc_active_txs
) {
2001 LASSERT(!tx
->tx_queued
);
2002 LASSERT(tx
->tx_waiting
|| tx
->tx_sending
);
2004 LASSERT(tx
->tx_queued
);
2007 tx
->tx_status
= -ECONNABORTED
;
2010 if (!tx
->tx_sending
) {
2012 list_del(&tx
->tx_list
);
2013 list_add(&tx
->tx_list
, &zombies
);
2017 spin_unlock(&conn
->ibc_lock
);
2019 kiblnd_txlist_done(conn
->ibc_peer
->ibp_ni
, &zombies
, -ECONNABORTED
);
2023 kiblnd_finalise_conn(struct kib_conn
*conn
)
2025 LASSERT(!in_interrupt());
2026 LASSERT(conn
->ibc_state
> IBLND_CONN_INIT
);
2028 kiblnd_set_conn_state(conn
, IBLND_CONN_DISCONNECTED
);
2031 * abort_receives moves QP state to IB_QPS_ERR. This is only required
2032 * for connections that didn't get as far as being connected, because
2033 * rdma_disconnect() does this for free.
2035 kiblnd_abort_receives(conn
);
2038 * Complete all tx descs not waiting for sends to complete.
2039 * NB we should be safe from RDMA now that the QP has changed state
2041 kiblnd_abort_txs(conn
, &conn
->ibc_tx_noops
);
2042 kiblnd_abort_txs(conn
, &conn
->ibc_tx_queue
);
2043 kiblnd_abort_txs(conn
, &conn
->ibc_tx_queue_rsrvd
);
2044 kiblnd_abort_txs(conn
, &conn
->ibc_tx_queue_nocred
);
2045 kiblnd_abort_txs(conn
, &conn
->ibc_active_txs
);
2047 kiblnd_handle_early_rxs(conn
);
2051 kiblnd_peer_connect_failed(struct kib_peer
*peer
, int active
, int error
)
2054 unsigned long flags
;
2057 LASSERT(!in_interrupt());
2059 write_lock_irqsave(&kiblnd_data
.kib_global_lock
, flags
);
2062 LASSERT(peer
->ibp_connecting
> 0);
2063 peer
->ibp_connecting
--;
2065 LASSERT(peer
->ibp_accepting
> 0);
2066 peer
->ibp_accepting
--;
2069 if (kiblnd_peer_connecting(peer
)) {
2070 /* another connection attempt under way... */
2071 write_unlock_irqrestore(&kiblnd_data
.kib_global_lock
,
2076 peer
->ibp_reconnected
= 0;
2077 if (list_empty(&peer
->ibp_conns
)) {
2078 /* Take peer's blocked transmits to complete with error */
2079 list_add(&zombies
, &peer
->ibp_tx_queue
);
2080 list_del_init(&peer
->ibp_tx_queue
);
2082 if (kiblnd_peer_active(peer
))
2083 kiblnd_unlink_peer_locked(peer
);
2085 peer
->ibp_error
= error
;
2087 /* Can't have blocked transmits if there are connections */
2088 LASSERT(list_empty(&peer
->ibp_tx_queue
));
2091 write_unlock_irqrestore(&kiblnd_data
.kib_global_lock
, flags
);
2093 kiblnd_peer_notify(peer
);
2095 if (list_empty(&zombies
))
2098 CNETERR("Deleting messages for %s: connection failed\n",
2099 libcfs_nid2str(peer
->ibp_nid
));
2101 kiblnd_txlist_done(peer
->ibp_ni
, &zombies
, -EHOSTUNREACH
);
2105 kiblnd_connreq_done(struct kib_conn
*conn
, int status
)
2107 struct kib_peer
*peer
= conn
->ibc_peer
;
2110 struct list_head txs
;
2111 unsigned long flags
;
2114 active
= (conn
->ibc_state
== IBLND_CONN_ACTIVE_CONNECT
);
2116 CDEBUG(D_NET
, "%s: active(%d), version(%x), status(%d)\n",
2117 libcfs_nid2str(peer
->ibp_nid
), active
,
2118 conn
->ibc_version
, status
);
2120 LASSERT(!in_interrupt());
2121 LASSERT((conn
->ibc_state
== IBLND_CONN_ACTIVE_CONNECT
&&
2122 peer
->ibp_connecting
> 0) ||
2123 (conn
->ibc_state
== IBLND_CONN_PASSIVE_WAIT
&&
2124 peer
->ibp_accepting
> 0));
2126 LIBCFS_FREE(conn
->ibc_connvars
, sizeof(*conn
->ibc_connvars
));
2127 conn
->ibc_connvars
= NULL
;
2130 /* failed to establish connection */
2131 kiblnd_peer_connect_failed(peer
, active
, status
);
2132 kiblnd_finalise_conn(conn
);
2136 /* connection established */
2137 write_lock_irqsave(&kiblnd_data
.kib_global_lock
, flags
);
2139 conn
->ibc_last_send
= jiffies
;
2140 kiblnd_set_conn_state(conn
, IBLND_CONN_ESTABLISHED
);
2141 kiblnd_peer_alive(peer
);
2144 * Add conn to peer's list and nuke any dangling conns from a different
2147 kiblnd_conn_addref(conn
); /* +1 ref for ibc_list */
2148 list_add(&conn
->ibc_list
, &peer
->ibp_conns
);
2149 peer
->ibp_reconnected
= 0;
2151 peer
->ibp_connecting
--;
2153 peer
->ibp_accepting
--;
2155 if (!peer
->ibp_version
) {
2156 peer
->ibp_version
= conn
->ibc_version
;
2157 peer
->ibp_incarnation
= conn
->ibc_incarnation
;
2160 if (peer
->ibp_version
!= conn
->ibc_version
||
2161 peer
->ibp_incarnation
!= conn
->ibc_incarnation
) {
2162 kiblnd_close_stale_conns_locked(peer
, conn
->ibc_version
,
2163 conn
->ibc_incarnation
);
2164 peer
->ibp_version
= conn
->ibc_version
;
2165 peer
->ibp_incarnation
= conn
->ibc_incarnation
;
2168 /* grab pending txs while I have the lock */
2169 list_add(&txs
, &peer
->ibp_tx_queue
);
2170 list_del_init(&peer
->ibp_tx_queue
);
2172 if (!kiblnd_peer_active(peer
) || /* peer has been deleted */
2173 conn
->ibc_comms_error
) { /* error has happened already */
2174 struct lnet_ni
*ni
= peer
->ibp_ni
;
2176 /* start to shut down connection */
2177 kiblnd_close_conn_locked(conn
, -ECONNABORTED
);
2178 write_unlock_irqrestore(&kiblnd_data
.kib_global_lock
, flags
);
2180 kiblnd_txlist_done(ni
, &txs
, -ECONNABORTED
);
2186 * +1 ref for myself, this connection is visible to other threads
2187 * now, refcount of peer:ibp_conns can be released by connection
2188 * close from either a different thread, or the calling of
2189 * kiblnd_check_sends_locked() below. See bz21911 for details.
2191 kiblnd_conn_addref(conn
);
2192 write_unlock_irqrestore(&kiblnd_data
.kib_global_lock
, flags
);
2194 /* Schedule blocked txs */
2195 spin_lock(&conn
->ibc_lock
);
2196 list_for_each_entry_safe(tx
, tmp
, &txs
, tx_list
) {
2197 list_del(&tx
->tx_list
);
2199 kiblnd_queue_tx_locked(tx
, conn
);
2201 kiblnd_check_sends_locked(conn
);
2202 spin_unlock(&conn
->ibc_lock
);
2204 /* schedule blocked rxs */
2205 kiblnd_handle_early_rxs(conn
);
2207 kiblnd_conn_decref(conn
);
2211 kiblnd_reject(struct rdma_cm_id
*cmid
, struct kib_rej
*rej
)
2215 rc
= rdma_reject(cmid
, rej
, sizeof(*rej
));
2218 CWARN("Error %d sending reject\n", rc
);
2222 kiblnd_passive_connect(struct rdma_cm_id
*cmid
, void *priv
, int priv_nob
)
2224 rwlock_t
*g_lock
= &kiblnd_data
.kib_global_lock
;
2225 struct kib_msg
*reqmsg
= priv
;
2226 struct kib_msg
*ackmsg
;
2227 struct kib_dev
*ibdev
;
2228 struct kib_peer
*peer
;
2229 struct kib_peer
*peer2
;
2230 struct kib_conn
*conn
;
2231 struct lnet_ni
*ni
= NULL
;
2232 struct kib_net
*net
= NULL
;
2234 struct rdma_conn_param cp
;
2236 int version
= IBLND_MSG_VERSION
;
2237 unsigned long flags
;
2240 struct sockaddr_in
*peer_addr
;
2242 LASSERT(!in_interrupt());
2244 /* cmid inherits 'context' from the corresponding listener id */
2245 ibdev
= (struct kib_dev
*)cmid
->context
;
2248 memset(&rej
, 0, sizeof(rej
));
2249 rej
.ibr_magic
= IBLND_MSG_MAGIC
;
2250 rej
.ibr_why
= IBLND_REJECT_FATAL
;
2251 rej
.ibr_cp
.ibcp_max_msg_size
= IBLND_MSG_SIZE
;
2253 peer_addr
= (struct sockaddr_in
*)&cmid
->route
.addr
.dst_addr
;
2254 if (*kiblnd_tunables
.kib_require_priv_port
&&
2255 ntohs(peer_addr
->sin_port
) >= PROT_SOCK
) {
2256 __u32 ip
= ntohl(peer_addr
->sin_addr
.s_addr
);
2258 CERROR("Peer's port (%pI4h:%hu) is not privileged\n",
2259 &ip
, ntohs(peer_addr
->sin_port
));
2263 if (priv_nob
< offsetof(struct kib_msg
, ibm_type
)) {
2264 CERROR("Short connection request\n");
2269 * Future protocol version compatibility support! If the
2270 * o2iblnd-specific protocol changes, or when LNET unifies
2271 * protocols over all LNDs, the initial connection will
2272 * negotiate a protocol version. I trap this here to avoid
2273 * console errors; the reject tells the peer which protocol I
2276 if (reqmsg
->ibm_magic
== LNET_PROTO_MAGIC
||
2277 reqmsg
->ibm_magic
== __swab32(LNET_PROTO_MAGIC
))
2279 if (reqmsg
->ibm_magic
== IBLND_MSG_MAGIC
&&
2280 reqmsg
->ibm_version
!= IBLND_MSG_VERSION
&&
2281 reqmsg
->ibm_version
!= IBLND_MSG_VERSION_1
)
2283 if (reqmsg
->ibm_magic
== __swab32(IBLND_MSG_MAGIC
) &&
2284 reqmsg
->ibm_version
!= __swab16(IBLND_MSG_VERSION
) &&
2285 reqmsg
->ibm_version
!= __swab16(IBLND_MSG_VERSION_1
))
2288 rc
= kiblnd_unpack_msg(reqmsg
, priv_nob
);
2290 CERROR("Can't parse connection request: %d\n", rc
);
2294 nid
= reqmsg
->ibm_srcnid
;
2295 ni
= lnet_net2ni(LNET_NIDNET(reqmsg
->ibm_dstnid
));
2298 net
= (struct kib_net
*)ni
->ni_data
;
2299 rej
.ibr_incarnation
= net
->ibn_incarnation
;
2302 if (!ni
|| /* no matching net */
2303 ni
->ni_nid
!= reqmsg
->ibm_dstnid
|| /* right NET, wrong NID! */
2304 net
->ibn_dev
!= ibdev
) { /* wrong device */
2305 CERROR("Can't accept conn from %s on %s (%s:%d:%pI4h): bad dst nid %s\n",
2306 libcfs_nid2str(nid
),
2307 !ni
? "NA" : libcfs_nid2str(ni
->ni_nid
),
2308 ibdev
->ibd_ifname
, ibdev
->ibd_nnets
,
2310 libcfs_nid2str(reqmsg
->ibm_dstnid
));
2315 /* check time stamp as soon as possible */
2316 if (reqmsg
->ibm_dststamp
&&
2317 reqmsg
->ibm_dststamp
!= net
->ibn_incarnation
) {
2318 CWARN("Stale connection request\n");
2319 rej
.ibr_why
= IBLND_REJECT_CONN_STALE
;
2323 /* I can accept peer's version */
2324 version
= reqmsg
->ibm_version
;
2326 if (reqmsg
->ibm_type
!= IBLND_MSG_CONNREQ
) {
2327 CERROR("Unexpected connreq msg type: %x from %s\n",
2328 reqmsg
->ibm_type
, libcfs_nid2str(nid
));
2332 if (reqmsg
->ibm_u
.connparams
.ibcp_queue_depth
>
2333 kiblnd_msg_queue_size(version
, ni
)) {
2334 CERROR("Can't accept conn from %s, queue depth too large: %d (<=%d wanted)\n",
2335 libcfs_nid2str(nid
),
2336 reqmsg
->ibm_u
.connparams
.ibcp_queue_depth
,
2337 kiblnd_msg_queue_size(version
, ni
));
2339 if (version
== IBLND_MSG_VERSION
)
2340 rej
.ibr_why
= IBLND_REJECT_MSG_QUEUE_SIZE
;
2345 max_frags
= reqmsg
->ibm_u
.connparams
.ibcp_max_frags
>> IBLND_FRAG_SHIFT
;
2346 if (max_frags
> kiblnd_rdma_frags(version
, ni
)) {
2347 CWARN("Can't accept conn from %s (version %x): max message size %d is too large (%d wanted)\n",
2348 libcfs_nid2str(nid
), version
, max_frags
,
2349 kiblnd_rdma_frags(version
, ni
));
2351 if (version
>= IBLND_MSG_VERSION
)
2352 rej
.ibr_why
= IBLND_REJECT_RDMA_FRAGS
;
2355 } else if (max_frags
< kiblnd_rdma_frags(version
, ni
) &&
2357 CWARN("Can't accept conn from %s (version %x): max message size %d incompatible without FMR pool (%d wanted)\n",
2358 libcfs_nid2str(nid
), version
, max_frags
,
2359 kiblnd_rdma_frags(version
, ni
));
2361 if (version
== IBLND_MSG_VERSION
)
2362 rej
.ibr_why
= IBLND_REJECT_RDMA_FRAGS
;
2367 if (reqmsg
->ibm_u
.connparams
.ibcp_max_msg_size
> IBLND_MSG_SIZE
) {
2368 CERROR("Can't accept %s: message size %d too big (%d max)\n",
2369 libcfs_nid2str(nid
),
2370 reqmsg
->ibm_u
.connparams
.ibcp_max_msg_size
,
2375 /* assume 'nid' is a new peer; create */
2376 rc
= kiblnd_create_peer(ni
, &peer
, nid
);
2378 CERROR("Can't create peer for %s\n", libcfs_nid2str(nid
));
2379 rej
.ibr_why
= IBLND_REJECT_NO_RESOURCES
;
2383 /* We have validated the peer's parameters so use those */
2384 peer
->ibp_max_frags
= max_frags
;
2385 peer
->ibp_queue_depth
= reqmsg
->ibm_u
.connparams
.ibcp_queue_depth
;
2387 write_lock_irqsave(g_lock
, flags
);
2389 peer2
= kiblnd_find_peer_locked(nid
);
2391 if (!peer2
->ibp_version
) {
2392 peer2
->ibp_version
= version
;
2393 peer2
->ibp_incarnation
= reqmsg
->ibm_srcstamp
;
2396 /* not the guy I've talked with */
2397 if (peer2
->ibp_incarnation
!= reqmsg
->ibm_srcstamp
||
2398 peer2
->ibp_version
!= version
) {
2399 kiblnd_close_peer_conns_locked(peer2
, -ESTALE
);
2401 if (kiblnd_peer_active(peer2
)) {
2402 peer2
->ibp_incarnation
= reqmsg
->ibm_srcstamp
;
2403 peer2
->ibp_version
= version
;
2405 write_unlock_irqrestore(g_lock
, flags
);
2407 CWARN("Conn stale %s version %x/%x incarnation %llu/%llu\n",
2408 libcfs_nid2str(nid
), peer2
->ibp_version
, version
,
2409 peer2
->ibp_incarnation
, reqmsg
->ibm_srcstamp
);
2411 kiblnd_peer_decref(peer
);
2412 rej
.ibr_why
= IBLND_REJECT_CONN_STALE
;
2417 * Tie-break connection race in favour of the higher NID.
2418 * If we keep running into a race condition multiple times,
2419 * we have to assume that the connection attempt with the
2420 * higher NID is stuck in a connecting state and will never
2421 * recover. As such, we pass through this if-block and let
2422 * the lower NID connection win so we can move forward.
2424 if (peer2
->ibp_connecting
&&
2425 nid
< ni
->ni_nid
&& peer2
->ibp_races
<
2426 MAX_CONN_RACES_BEFORE_ABORT
) {
2428 write_unlock_irqrestore(g_lock
, flags
);
2430 CDEBUG(D_NET
, "Conn race %s\n",
2431 libcfs_nid2str(peer2
->ibp_nid
));
2433 kiblnd_peer_decref(peer
);
2434 rej
.ibr_why
= IBLND_REJECT_CONN_RACE
;
2437 if (peer2
->ibp_races
>= MAX_CONN_RACES_BEFORE_ABORT
)
2438 CNETERR("Conn race %s: unresolved after %d attempts, letting lower NID win\n",
2439 libcfs_nid2str(peer2
->ibp_nid
),
2440 MAX_CONN_RACES_BEFORE_ABORT
);
2442 * passive connection is allowed even this peer is waiting for
2445 peer2
->ibp_reconnecting
= 0;
2446 peer2
->ibp_races
= 0;
2447 peer2
->ibp_accepting
++;
2448 kiblnd_peer_addref(peer2
);
2451 * Race with kiblnd_launch_tx (active connect) to create peer
2452 * so copy validated parameters since we now know what the
2455 peer2
->ibp_max_frags
= peer
->ibp_max_frags
;
2456 peer2
->ibp_queue_depth
= peer
->ibp_queue_depth
;
2458 write_unlock_irqrestore(g_lock
, flags
);
2459 kiblnd_peer_decref(peer
);
2462 /* Brand new peer */
2463 LASSERT(!peer
->ibp_accepting
);
2464 LASSERT(!peer
->ibp_version
&&
2465 !peer
->ibp_incarnation
);
2467 peer
->ibp_accepting
= 1;
2468 peer
->ibp_version
= version
;
2469 peer
->ibp_incarnation
= reqmsg
->ibm_srcstamp
;
2471 /* I have a ref on ni that prevents it being shutdown */
2472 LASSERT(!net
->ibn_shutdown
);
2474 kiblnd_peer_addref(peer
);
2475 list_add_tail(&peer
->ibp_list
, kiblnd_nid2peerlist(nid
));
2477 write_unlock_irqrestore(g_lock
, flags
);
2480 conn
= kiblnd_create_conn(peer
, cmid
, IBLND_CONN_PASSIVE_WAIT
,
2483 kiblnd_peer_connect_failed(peer
, 0, -ENOMEM
);
2484 kiblnd_peer_decref(peer
);
2485 rej
.ibr_why
= IBLND_REJECT_NO_RESOURCES
;
2490 * conn now "owns" cmid, so I return success from here on to ensure the
2491 * CM callback doesn't destroy cmid.
2493 conn
->ibc_incarnation
= reqmsg
->ibm_srcstamp
;
2494 conn
->ibc_credits
= conn
->ibc_queue_depth
;
2495 conn
->ibc_reserved_credits
= conn
->ibc_queue_depth
;
2496 LASSERT(conn
->ibc_credits
+ conn
->ibc_reserved_credits
+
2497 IBLND_OOB_MSGS(version
) <= IBLND_RX_MSGS(conn
));
2499 ackmsg
= &conn
->ibc_connvars
->cv_msg
;
2500 memset(ackmsg
, 0, sizeof(*ackmsg
));
2502 kiblnd_init_msg(ackmsg
, IBLND_MSG_CONNACK
,
2503 sizeof(ackmsg
->ibm_u
.connparams
));
2504 ackmsg
->ibm_u
.connparams
.ibcp_queue_depth
= conn
->ibc_queue_depth
;
2505 ackmsg
->ibm_u
.connparams
.ibcp_max_frags
= conn
->ibc_max_frags
<< IBLND_FRAG_SHIFT
;
2506 ackmsg
->ibm_u
.connparams
.ibcp_max_msg_size
= IBLND_MSG_SIZE
;
2508 kiblnd_pack_msg(ni
, ackmsg
, version
, 0, nid
, reqmsg
->ibm_srcstamp
);
2510 memset(&cp
, 0, sizeof(cp
));
2511 cp
.private_data
= ackmsg
;
2512 cp
.private_data_len
= ackmsg
->ibm_nob
;
2513 cp
.responder_resources
= 0; /* No atomic ops or RDMA reads */
2514 cp
.initiator_depth
= 0;
2515 cp
.flow_control
= 1;
2516 cp
.retry_count
= *kiblnd_tunables
.kib_retry_count
;
2517 cp
.rnr_retry_count
= *kiblnd_tunables
.kib_rnr_retry_count
;
2519 CDEBUG(D_NET
, "Accept %s\n", libcfs_nid2str(nid
));
2521 rc
= rdma_accept(cmid
, &cp
);
2523 CERROR("Can't accept %s: %d\n", libcfs_nid2str(nid
), rc
);
2524 rej
.ibr_version
= version
;
2525 rej
.ibr_why
= IBLND_REJECT_FATAL
;
2527 kiblnd_reject(cmid
, &rej
);
2528 kiblnd_connreq_done(conn
, rc
);
2529 kiblnd_conn_decref(conn
);
2537 rej
.ibr_cp
.ibcp_queue_depth
= kiblnd_msg_queue_size(version
, ni
);
2538 rej
.ibr_cp
.ibcp_max_frags
= kiblnd_rdma_frags(version
, ni
);
2542 rej
.ibr_version
= version
;
2543 kiblnd_reject(cmid
, &rej
);
2545 return -ECONNREFUSED
;
2549 kiblnd_check_reconnect(struct kib_conn
*conn
, int version
,
2550 __u64 incarnation
, int why
, struct kib_connparams
*cp
)
2552 rwlock_t
*glock
= &kiblnd_data
.kib_global_lock
;
2553 struct kib_peer
*peer
= conn
->ibc_peer
;
2555 int msg_size
= IBLND_MSG_SIZE
;
2559 unsigned long flags
;
2561 LASSERT(conn
->ibc_state
== IBLND_CONN_ACTIVE_CONNECT
);
2562 LASSERT(peer
->ibp_connecting
> 0); /* 'conn' at least */
2563 LASSERT(!peer
->ibp_reconnecting
);
2566 msg_size
= cp
->ibcp_max_msg_size
;
2567 frag_num
= cp
->ibcp_max_frags
<< IBLND_FRAG_SHIFT
;
2568 queue_dep
= cp
->ibcp_queue_depth
;
2571 write_lock_irqsave(glock
, flags
);
2573 * retry connection if it's still needed and no other connection
2574 * attempts (active or passive) are in progress
2575 * NB: reconnect is still needed even when ibp_tx_queue is
2576 * empty if ibp_version != version because reconnect may be
2577 * initiated by kiblnd_query()
2579 reconnect
= (!list_empty(&peer
->ibp_tx_queue
) ||
2580 peer
->ibp_version
!= version
) &&
2581 peer
->ibp_connecting
== 1 &&
2582 !peer
->ibp_accepting
;
2593 case IBLND_REJECT_RDMA_FRAGS
: {
2594 struct lnet_ioctl_config_lnd_tunables
*tunables
;
2597 reason
= "can't negotiate max frags";
2600 tunables
= peer
->ibp_ni
->ni_lnd_tunables
;
2601 if (!tunables
->lt_tun_u
.lt_o2ib
.lnd_map_on_demand
) {
2602 reason
= "map_on_demand must be enabled";
2605 if (conn
->ibc_max_frags
<= frag_num
) {
2606 reason
= "unsupported max frags";
2610 peer
->ibp_max_frags
= frag_num
;
2611 reason
= "rdma fragments";
2614 case IBLND_REJECT_MSG_QUEUE_SIZE
:
2616 reason
= "can't negotiate queue depth";
2619 if (conn
->ibc_queue_depth
<= queue_dep
) {
2620 reason
= "unsupported queue depth";
2624 peer
->ibp_queue_depth
= queue_dep
;
2625 reason
= "queue depth";
2628 case IBLND_REJECT_CONN_STALE
:
2632 case IBLND_REJECT_CONN_RACE
:
2633 reason
= "conn race";
2636 case IBLND_REJECT_CONN_UNCOMPAT
:
2637 reason
= "version negotiation";
2641 conn
->ibc_reconnect
= 1;
2642 peer
->ibp_reconnecting
= 1;
2643 peer
->ibp_version
= version
;
2645 peer
->ibp_incarnation
= incarnation
;
2647 write_unlock_irqrestore(glock
, flags
);
2649 CNETERR("%s: %s (%s), %x, %x, msg_size: %d, queue_depth: %d/%d, max_frags: %d/%d\n",
2650 libcfs_nid2str(peer
->ibp_nid
),
2651 reconnect
? "reconnect" : "don't reconnect",
2652 reason
, IBLND_MSG_VERSION
, version
, msg_size
,
2653 conn
->ibc_queue_depth
, queue_dep
,
2654 conn
->ibc_max_frags
, frag_num
);
2656 * if conn::ibc_reconnect is TRUE, connd will reconnect to the peer
2657 * while destroying the zombie
2662 kiblnd_rejected(struct kib_conn
*conn
, int reason
, void *priv
, int priv_nob
)
2664 struct kib_peer
*peer
= conn
->ibc_peer
;
2666 LASSERT(!in_interrupt());
2667 LASSERT(conn
->ibc_state
== IBLND_CONN_ACTIVE_CONNECT
);
2670 case IB_CM_REJ_STALE_CONN
:
2671 kiblnd_check_reconnect(conn
, IBLND_MSG_VERSION
, 0,
2672 IBLND_REJECT_CONN_STALE
, NULL
);
2675 case IB_CM_REJ_INVALID_SERVICE_ID
:
2676 CNETERR("%s rejected: no listener at %d\n",
2677 libcfs_nid2str(peer
->ibp_nid
),
2678 *kiblnd_tunables
.kib_service
);
2681 case IB_CM_REJ_CONSUMER_DEFINED
:
2682 if (priv_nob
>= offsetof(struct kib_rej
, ibr_padding
)) {
2683 struct kib_rej
*rej
= priv
;
2684 struct kib_connparams
*cp
= NULL
;
2686 __u64 incarnation
= -1;
2688 /* NB. default incarnation is -1 because:
2689 * a) V1 will ignore dst incarnation in connreq.
2690 * b) V2 will provide incarnation while rejecting me,
2691 * -1 will be overwrote.
2693 * if I try to connect to a V1 peer with V2 protocol,
2694 * it rejected me then upgrade to V2, I have no idea
2695 * about the upgrading and try to reconnect with V1,
2696 * in this case upgraded V2 can find out I'm trying to
2697 * talk to the old guy and reject me(incarnation is -1).
2700 if (rej
->ibr_magic
== __swab32(IBLND_MSG_MAGIC
) ||
2701 rej
->ibr_magic
== __swab32(LNET_PROTO_MAGIC
)) {
2702 __swab32s(&rej
->ibr_magic
);
2703 __swab16s(&rej
->ibr_version
);
2707 if (priv_nob
>= sizeof(struct kib_rej
) &&
2708 rej
->ibr_version
> IBLND_MSG_VERSION_1
) {
2710 * priv_nob is always 148 in current version
2711 * of OFED, so we still need to check version.
2712 * (define of IB_CM_REJ_PRIVATE_DATA_SIZE)
2717 __swab64s(&rej
->ibr_incarnation
);
2718 __swab16s(&cp
->ibcp_queue_depth
);
2719 __swab16s(&cp
->ibcp_max_frags
);
2720 __swab32s(&cp
->ibcp_max_msg_size
);
2723 incarnation
= rej
->ibr_incarnation
;
2726 if (rej
->ibr_magic
!= IBLND_MSG_MAGIC
&&
2727 rej
->ibr_magic
!= LNET_PROTO_MAGIC
) {
2728 CERROR("%s rejected: consumer defined fatal error\n",
2729 libcfs_nid2str(peer
->ibp_nid
));
2733 if (rej
->ibr_version
!= IBLND_MSG_VERSION
&&
2734 rej
->ibr_version
!= IBLND_MSG_VERSION_1
) {
2735 CERROR("%s rejected: o2iblnd version %x error\n",
2736 libcfs_nid2str(peer
->ibp_nid
),
2741 if (rej
->ibr_why
== IBLND_REJECT_FATAL
&&
2742 rej
->ibr_version
== IBLND_MSG_VERSION_1
) {
2743 CDEBUG(D_NET
, "rejected by old version peer %s: %x\n",
2744 libcfs_nid2str(peer
->ibp_nid
), rej
->ibr_version
);
2746 if (conn
->ibc_version
!= IBLND_MSG_VERSION_1
)
2747 rej
->ibr_why
= IBLND_REJECT_CONN_UNCOMPAT
;
2750 switch (rej
->ibr_why
) {
2751 case IBLND_REJECT_CONN_RACE
:
2752 case IBLND_REJECT_CONN_STALE
:
2753 case IBLND_REJECT_CONN_UNCOMPAT
:
2754 case IBLND_REJECT_MSG_QUEUE_SIZE
:
2755 case IBLND_REJECT_RDMA_FRAGS
:
2756 kiblnd_check_reconnect(conn
, rej
->ibr_version
,
2761 case IBLND_REJECT_NO_RESOURCES
:
2762 CERROR("%s rejected: o2iblnd no resources\n",
2763 libcfs_nid2str(peer
->ibp_nid
));
2766 case IBLND_REJECT_FATAL
:
2767 CERROR("%s rejected: o2iblnd fatal error\n",
2768 libcfs_nid2str(peer
->ibp_nid
));
2772 CERROR("%s rejected: o2iblnd reason %d\n",
2773 libcfs_nid2str(peer
->ibp_nid
),
2781 CNETERR("%s rejected: reason %d, size %d\n",
2782 libcfs_nid2str(peer
->ibp_nid
), reason
, priv_nob
);
2786 kiblnd_connreq_done(conn
, -ECONNREFUSED
);
2790 kiblnd_check_connreply(struct kib_conn
*conn
, void *priv
, int priv_nob
)
2792 struct kib_peer
*peer
= conn
->ibc_peer
;
2793 struct lnet_ni
*ni
= peer
->ibp_ni
;
2794 struct kib_net
*net
= ni
->ni_data
;
2795 struct kib_msg
*msg
= priv
;
2796 int ver
= conn
->ibc_version
;
2797 int rc
= kiblnd_unpack_msg(msg
, priv_nob
);
2798 unsigned long flags
;
2803 CERROR("Can't unpack connack from %s: %d\n",
2804 libcfs_nid2str(peer
->ibp_nid
), rc
);
2808 if (msg
->ibm_type
!= IBLND_MSG_CONNACK
) {
2809 CERROR("Unexpected message %d from %s\n",
2810 msg
->ibm_type
, libcfs_nid2str(peer
->ibp_nid
));
2815 if (ver
!= msg
->ibm_version
) {
2816 CERROR("%s replied version %x is different with requested version %x\n",
2817 libcfs_nid2str(peer
->ibp_nid
), msg
->ibm_version
, ver
);
2822 if (msg
->ibm_u
.connparams
.ibcp_queue_depth
>
2823 conn
->ibc_queue_depth
) {
2824 CERROR("%s has incompatible queue depth %d (<=%d wanted)\n",
2825 libcfs_nid2str(peer
->ibp_nid
),
2826 msg
->ibm_u
.connparams
.ibcp_queue_depth
,
2827 conn
->ibc_queue_depth
);
2832 if ((msg
->ibm_u
.connparams
.ibcp_max_frags
>> IBLND_FRAG_SHIFT
) >
2833 conn
->ibc_max_frags
) {
2834 CERROR("%s has incompatible max_frags %d (<=%d wanted)\n",
2835 libcfs_nid2str(peer
->ibp_nid
),
2836 msg
->ibm_u
.connparams
.ibcp_max_frags
>> IBLND_FRAG_SHIFT
,
2837 conn
->ibc_max_frags
);
2842 if (msg
->ibm_u
.connparams
.ibcp_max_msg_size
> IBLND_MSG_SIZE
) {
2843 CERROR("%s max message size %d too big (%d max)\n",
2844 libcfs_nid2str(peer
->ibp_nid
),
2845 msg
->ibm_u
.connparams
.ibcp_max_msg_size
,
2851 read_lock_irqsave(&kiblnd_data
.kib_global_lock
, flags
);
2852 if (msg
->ibm_dstnid
== ni
->ni_nid
&&
2853 msg
->ibm_dststamp
== net
->ibn_incarnation
)
2857 read_unlock_irqrestore(&kiblnd_data
.kib_global_lock
, flags
);
2860 CERROR("Bad connection reply from %s, rc = %d, version: %x max_frags: %d\n",
2861 libcfs_nid2str(peer
->ibp_nid
), rc
,
2862 msg
->ibm_version
, msg
->ibm_u
.connparams
.ibcp_max_frags
);
2866 conn
->ibc_incarnation
= msg
->ibm_srcstamp
;
2867 conn
->ibc_credits
= msg
->ibm_u
.connparams
.ibcp_queue_depth
;
2868 conn
->ibc_reserved_credits
= msg
->ibm_u
.connparams
.ibcp_queue_depth
;
2869 conn
->ibc_queue_depth
= msg
->ibm_u
.connparams
.ibcp_queue_depth
;
2870 conn
->ibc_max_frags
= msg
->ibm_u
.connparams
.ibcp_max_frags
>> IBLND_FRAG_SHIFT
;
2871 LASSERT(conn
->ibc_credits
+ conn
->ibc_reserved_credits
+
2872 IBLND_OOB_MSGS(ver
) <= IBLND_RX_MSGS(conn
));
2874 kiblnd_connreq_done(conn
, 0);
2879 * NB My QP has already established itself, so I handle anything going
2880 * wrong here by setting ibc_comms_error.
2881 * kiblnd_connreq_done(0) moves the conn state to ESTABLISHED, but then
2882 * immediately tears it down.
2885 conn
->ibc_comms_error
= rc
;
2886 kiblnd_connreq_done(conn
, 0);
2890 kiblnd_active_connect(struct rdma_cm_id
*cmid
)
2892 struct kib_peer
*peer
= (struct kib_peer
*)cmid
->context
;
2893 struct kib_conn
*conn
;
2894 struct kib_msg
*msg
;
2895 struct rdma_conn_param cp
;
2898 unsigned long flags
;
2901 read_lock_irqsave(&kiblnd_data
.kib_global_lock
, flags
);
2903 incarnation
= peer
->ibp_incarnation
;
2904 version
= !peer
->ibp_version
? IBLND_MSG_VERSION
:
2907 read_unlock_irqrestore(&kiblnd_data
.kib_global_lock
, flags
);
2909 conn
= kiblnd_create_conn(peer
, cmid
, IBLND_CONN_ACTIVE_CONNECT
,
2912 kiblnd_peer_connect_failed(peer
, 1, -ENOMEM
);
2913 kiblnd_peer_decref(peer
); /* lose cmid's ref */
2918 * conn "owns" cmid now, so I return success from here on to ensure the
2919 * CM callback doesn't destroy cmid. conn also takes over cmid's ref
2922 msg
= &conn
->ibc_connvars
->cv_msg
;
2924 memset(msg
, 0, sizeof(*msg
));
2925 kiblnd_init_msg(msg
, IBLND_MSG_CONNREQ
, sizeof(msg
->ibm_u
.connparams
));
2926 msg
->ibm_u
.connparams
.ibcp_queue_depth
= conn
->ibc_queue_depth
;
2927 msg
->ibm_u
.connparams
.ibcp_max_frags
= conn
->ibc_max_frags
<< IBLND_FRAG_SHIFT
;
2928 msg
->ibm_u
.connparams
.ibcp_max_msg_size
= IBLND_MSG_SIZE
;
2930 kiblnd_pack_msg(peer
->ibp_ni
, msg
, version
,
2931 0, peer
->ibp_nid
, incarnation
);
2933 memset(&cp
, 0, sizeof(cp
));
2934 cp
.private_data
= msg
;
2935 cp
.private_data_len
= msg
->ibm_nob
;
2936 cp
.responder_resources
= 0; /* No atomic ops or RDMA reads */
2937 cp
.initiator_depth
= 0;
2938 cp
.flow_control
= 1;
2939 cp
.retry_count
= *kiblnd_tunables
.kib_retry_count
;
2940 cp
.rnr_retry_count
= *kiblnd_tunables
.kib_rnr_retry_count
;
2942 LASSERT(cmid
->context
== (void *)conn
);
2943 LASSERT(conn
->ibc_cmid
== cmid
);
2945 rc
= rdma_connect(cmid
, &cp
);
2947 CERROR("Can't connect to %s: %d\n",
2948 libcfs_nid2str(peer
->ibp_nid
), rc
);
2949 kiblnd_connreq_done(conn
, rc
);
2950 kiblnd_conn_decref(conn
);
2957 kiblnd_cm_callback(struct rdma_cm_id
*cmid
, struct rdma_cm_event
*event
)
2959 struct kib_peer
*peer
;
2960 struct kib_conn
*conn
;
2963 switch (event
->event
) {
2965 CERROR("Unexpected event: %d, status: %d\n",
2966 event
->event
, event
->status
);
2969 case RDMA_CM_EVENT_CONNECT_REQUEST
:
2970 /* destroy cmid on failure */
2971 rc
= kiblnd_passive_connect(cmid
,
2972 (void *)KIBLND_CONN_PARAM(event
),
2973 KIBLND_CONN_PARAM_LEN(event
));
2974 CDEBUG(D_NET
, "connreq: %d\n", rc
);
2977 case RDMA_CM_EVENT_ADDR_ERROR
:
2978 peer
= (struct kib_peer
*)cmid
->context
;
2979 CNETERR("%s: ADDR ERROR %d\n",
2980 libcfs_nid2str(peer
->ibp_nid
), event
->status
);
2981 kiblnd_peer_connect_failed(peer
, 1, -EHOSTUNREACH
);
2982 kiblnd_peer_decref(peer
);
2983 return -EHOSTUNREACH
; /* rc destroys cmid */
2985 case RDMA_CM_EVENT_ADDR_RESOLVED
:
2986 peer
= (struct kib_peer
*)cmid
->context
;
2988 CDEBUG(D_NET
, "%s Addr resolved: %d\n",
2989 libcfs_nid2str(peer
->ibp_nid
), event
->status
);
2991 if (event
->status
) {
2992 CNETERR("Can't resolve address for %s: %d\n",
2993 libcfs_nid2str(peer
->ibp_nid
), event
->status
);
2996 rc
= rdma_resolve_route(
2997 cmid
, *kiblnd_tunables
.kib_timeout
* 1000);
3000 /* Can't initiate route resolution */
3001 CERROR("Can't resolve route for %s: %d\n",
3002 libcfs_nid2str(peer
->ibp_nid
), rc
);
3004 kiblnd_peer_connect_failed(peer
, 1, rc
);
3005 kiblnd_peer_decref(peer
);
3006 return rc
; /* rc destroys cmid */
3008 case RDMA_CM_EVENT_ROUTE_ERROR
:
3009 peer
= (struct kib_peer
*)cmid
->context
;
3010 CNETERR("%s: ROUTE ERROR %d\n",
3011 libcfs_nid2str(peer
->ibp_nid
), event
->status
);
3012 kiblnd_peer_connect_failed(peer
, 1, -EHOSTUNREACH
);
3013 kiblnd_peer_decref(peer
);
3014 return -EHOSTUNREACH
; /* rc destroys cmid */
3016 case RDMA_CM_EVENT_ROUTE_RESOLVED
:
3017 peer
= (struct kib_peer
*)cmid
->context
;
3018 CDEBUG(D_NET
, "%s Route resolved: %d\n",
3019 libcfs_nid2str(peer
->ibp_nid
), event
->status
);
3022 return kiblnd_active_connect(cmid
);
3024 CNETERR("Can't resolve route for %s: %d\n",
3025 libcfs_nid2str(peer
->ibp_nid
), event
->status
);
3026 kiblnd_peer_connect_failed(peer
, 1, event
->status
);
3027 kiblnd_peer_decref(peer
);
3028 return event
->status
; /* rc destroys cmid */
3030 case RDMA_CM_EVENT_UNREACHABLE
:
3031 conn
= (struct kib_conn
*)cmid
->context
;
3032 LASSERT(conn
->ibc_state
== IBLND_CONN_ACTIVE_CONNECT
||
3033 conn
->ibc_state
== IBLND_CONN_PASSIVE_WAIT
);
3034 CNETERR("%s: UNREACHABLE %d\n",
3035 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
), event
->status
);
3036 kiblnd_connreq_done(conn
, -ENETDOWN
);
3037 kiblnd_conn_decref(conn
);
3040 case RDMA_CM_EVENT_CONNECT_ERROR
:
3041 conn
= (struct kib_conn
*)cmid
->context
;
3042 LASSERT(conn
->ibc_state
== IBLND_CONN_ACTIVE_CONNECT
||
3043 conn
->ibc_state
== IBLND_CONN_PASSIVE_WAIT
);
3044 CNETERR("%s: CONNECT ERROR %d\n",
3045 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
), event
->status
);
3046 kiblnd_connreq_done(conn
, -ENOTCONN
);
3047 kiblnd_conn_decref(conn
);
3050 case RDMA_CM_EVENT_REJECTED
:
3051 conn
= (struct kib_conn
*)cmid
->context
;
3052 switch (conn
->ibc_state
) {
3056 case IBLND_CONN_PASSIVE_WAIT
:
3057 CERROR("%s: REJECTED %d\n",
3058 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
),
3060 kiblnd_connreq_done(conn
, -ECONNRESET
);
3063 case IBLND_CONN_ACTIVE_CONNECT
:
3064 kiblnd_rejected(conn
, event
->status
,
3065 (void *)KIBLND_CONN_PARAM(event
),
3066 KIBLND_CONN_PARAM_LEN(event
));
3069 kiblnd_conn_decref(conn
);
3072 case RDMA_CM_EVENT_ESTABLISHED
:
3073 conn
= (struct kib_conn
*)cmid
->context
;
3074 switch (conn
->ibc_state
) {
3078 case IBLND_CONN_PASSIVE_WAIT
:
3079 CDEBUG(D_NET
, "ESTABLISHED (passive): %s\n",
3080 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
));
3081 kiblnd_connreq_done(conn
, 0);
3084 case IBLND_CONN_ACTIVE_CONNECT
:
3085 CDEBUG(D_NET
, "ESTABLISHED(active): %s\n",
3086 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
));
3087 kiblnd_check_connreply(conn
,
3088 (void *)KIBLND_CONN_PARAM(event
),
3089 KIBLND_CONN_PARAM_LEN(event
));
3092 /* net keeps its ref on conn! */
3095 case RDMA_CM_EVENT_TIMEWAIT_EXIT
:
3096 CDEBUG(D_NET
, "Ignore TIMEWAIT_EXIT event\n");
3098 case RDMA_CM_EVENT_DISCONNECTED
:
3099 conn
= (struct kib_conn
*)cmid
->context
;
3100 if (conn
->ibc_state
< IBLND_CONN_ESTABLISHED
) {
3101 CERROR("%s DISCONNECTED\n",
3102 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
));
3103 kiblnd_connreq_done(conn
, -ECONNRESET
);
3105 kiblnd_close_conn(conn
, 0);
3107 kiblnd_conn_decref(conn
);
3108 cmid
->context
= NULL
;
3111 case RDMA_CM_EVENT_DEVICE_REMOVAL
:
3112 LCONSOLE_ERROR_MSG(0x131,
3113 "Received notification of device removal\n"
3114 "Please shutdown LNET to allow this to proceed\n");
3116 * Can't remove network from underneath LNET for now, so I have
3121 case RDMA_CM_EVENT_ADDR_CHANGE
:
3122 LCONSOLE_INFO("Physical link changed (eg hca/port)\n");
3128 kiblnd_check_txs_locked(struct kib_conn
*conn
, struct list_head
*txs
)
3131 struct list_head
*ttmp
;
3133 list_for_each(ttmp
, txs
) {
3134 tx
= list_entry(ttmp
, struct kib_tx
, tx_list
);
3136 if (txs
!= &conn
->ibc_active_txs
) {
3137 LASSERT(tx
->tx_queued
);
3139 LASSERT(!tx
->tx_queued
);
3140 LASSERT(tx
->tx_waiting
|| tx
->tx_sending
);
3143 if (cfs_time_aftereq(jiffies
, tx
->tx_deadline
)) {
3144 CERROR("Timed out tx: %s, %lu seconds\n",
3145 kiblnd_queue2str(conn
, txs
),
3146 cfs_duration_sec(jiffies
- tx
->tx_deadline
));
3155 kiblnd_conn_timed_out_locked(struct kib_conn
*conn
)
3157 return kiblnd_check_txs_locked(conn
, &conn
->ibc_tx_queue
) ||
3158 kiblnd_check_txs_locked(conn
, &conn
->ibc_tx_noops
) ||
3159 kiblnd_check_txs_locked(conn
, &conn
->ibc_tx_queue_rsrvd
) ||
3160 kiblnd_check_txs_locked(conn
, &conn
->ibc_tx_queue_nocred
) ||
3161 kiblnd_check_txs_locked(conn
, &conn
->ibc_active_txs
);
3165 kiblnd_check_conns(int idx
)
3168 LIST_HEAD(checksends
);
3169 struct list_head
*peers
= &kiblnd_data
.kib_peers
[idx
];
3170 struct list_head
*ptmp
;
3171 struct kib_peer
*peer
;
3172 struct kib_conn
*conn
;
3173 struct kib_conn
*temp
;
3174 struct kib_conn
*tmp
;
3175 struct list_head
*ctmp
;
3176 unsigned long flags
;
3179 * NB. We expect to have a look at all the peers and not find any
3180 * RDMAs to time out, so we just use a shared lock while we
3183 read_lock_irqsave(&kiblnd_data
.kib_global_lock
, flags
);
3185 list_for_each(ptmp
, peers
) {
3186 peer
= list_entry(ptmp
, struct kib_peer
, ibp_list
);
3188 list_for_each(ctmp
, &peer
->ibp_conns
) {
3192 conn
= list_entry(ctmp
, struct kib_conn
, ibc_list
);
3194 LASSERT(conn
->ibc_state
== IBLND_CONN_ESTABLISHED
);
3196 spin_lock(&conn
->ibc_lock
);
3198 sendnoop
= kiblnd_need_noop(conn
);
3199 timedout
= kiblnd_conn_timed_out_locked(conn
);
3200 if (!sendnoop
&& !timedout
) {
3201 spin_unlock(&conn
->ibc_lock
);
3206 CERROR("Timed out RDMA with %s (%lu): c: %u, oc: %u, rc: %u\n",
3207 libcfs_nid2str(peer
->ibp_nid
),
3208 cfs_duration_sec(cfs_time_current() -
3209 peer
->ibp_last_alive
),
3211 conn
->ibc_outstanding_credits
,
3212 conn
->ibc_reserved_credits
);
3213 list_add(&conn
->ibc_connd_list
, &closes
);
3215 list_add(&conn
->ibc_connd_list
, &checksends
);
3217 /* +ref for 'closes' or 'checksends' */
3218 kiblnd_conn_addref(conn
);
3220 spin_unlock(&conn
->ibc_lock
);
3224 read_unlock_irqrestore(&kiblnd_data
.kib_global_lock
, flags
);
3227 * Handle timeout by closing the whole
3228 * connection. We can only be sure RDMA activity
3229 * has ceased once the QP has been modified.
3231 list_for_each_entry_safe(conn
, tmp
, &closes
, ibc_connd_list
) {
3232 list_del(&conn
->ibc_connd_list
);
3233 kiblnd_close_conn(conn
, -ETIMEDOUT
);
3234 kiblnd_conn_decref(conn
);
3238 * In case we have enough credits to return via a
3239 * NOOP, but there were no non-blocking tx descs
3240 * free to do it last time...
3242 list_for_each_entry_safe(conn
, temp
, &checksends
, ibc_connd_list
) {
3243 list_del(&conn
->ibc_connd_list
);
3245 spin_lock(&conn
->ibc_lock
);
3246 kiblnd_check_sends_locked(conn
);
3247 spin_unlock(&conn
->ibc_lock
);
3249 kiblnd_conn_decref(conn
);
3254 kiblnd_disconnect_conn(struct kib_conn
*conn
)
3256 LASSERT(!in_interrupt());
3257 LASSERT(current
== kiblnd_data
.kib_connd
);
3258 LASSERT(conn
->ibc_state
== IBLND_CONN_CLOSING
);
3260 rdma_disconnect(conn
->ibc_cmid
);
3261 kiblnd_finalise_conn(conn
);
3263 kiblnd_peer_notify(conn
->ibc_peer
);
3267 * High-water for reconnection to the same peer, reconnection attempt should
3268 * be delayed after trying more than KIB_RECONN_HIGH_RACE.
3270 #define KIB_RECONN_HIGH_RACE 10
3272 * Allow connd to take a break and handle other things after consecutive
3273 * reconnection attempts.
3275 #define KIB_RECONN_BREAK 100
3278 kiblnd_connd(void *arg
)
3280 spinlock_t
*lock
= &kiblnd_data
.kib_connd_lock
;
3281 wait_queue_entry_t wait
;
3282 unsigned long flags
;
3283 struct kib_conn
*conn
;
3288 unsigned long deadline
= jiffies
;
3290 cfs_block_allsigs();
3292 init_waitqueue_entry(&wait
, current
);
3293 kiblnd_data
.kib_connd
= current
;
3295 spin_lock_irqsave(lock
, flags
);
3297 while (!kiblnd_data
.kib_shutdown
) {
3302 if (!list_empty(&kiblnd_data
.kib_connd_zombies
)) {
3303 struct kib_peer
*peer
= NULL
;
3305 conn
= list_entry(kiblnd_data
.kib_connd_zombies
.next
,
3306 struct kib_conn
, ibc_list
);
3307 list_del(&conn
->ibc_list
);
3308 if (conn
->ibc_reconnect
) {
3309 peer
= conn
->ibc_peer
;
3310 kiblnd_peer_addref(peer
);
3313 spin_unlock_irqrestore(lock
, flags
);
3316 kiblnd_destroy_conn(conn
, !peer
);
3318 spin_lock_irqsave(lock
, flags
);
3322 conn
->ibc_peer
= peer
;
3323 if (peer
->ibp_reconnected
< KIB_RECONN_HIGH_RACE
)
3324 list_add_tail(&conn
->ibc_list
,
3325 &kiblnd_data
.kib_reconn_list
);
3327 list_add_tail(&conn
->ibc_list
,
3328 &kiblnd_data
.kib_reconn_wait
);
3331 if (!list_empty(&kiblnd_data
.kib_connd_conns
)) {
3332 conn
= list_entry(kiblnd_data
.kib_connd_conns
.next
,
3333 struct kib_conn
, ibc_list
);
3334 list_del(&conn
->ibc_list
);
3336 spin_unlock_irqrestore(lock
, flags
);
3339 kiblnd_disconnect_conn(conn
);
3340 kiblnd_conn_decref(conn
);
3342 spin_lock_irqsave(lock
, flags
);
3345 while (reconn
< KIB_RECONN_BREAK
) {
3346 if (kiblnd_data
.kib_reconn_sec
!=
3347 ktime_get_real_seconds()) {
3348 kiblnd_data
.kib_reconn_sec
= ktime_get_real_seconds();
3349 list_splice_init(&kiblnd_data
.kib_reconn_wait
,
3350 &kiblnd_data
.kib_reconn_list
);
3353 if (list_empty(&kiblnd_data
.kib_reconn_list
))
3356 conn
= list_entry(kiblnd_data
.kib_reconn_list
.next
,
3357 struct kib_conn
, ibc_list
);
3358 list_del(&conn
->ibc_list
);
3360 spin_unlock_irqrestore(lock
, flags
);
3363 reconn
+= kiblnd_reconnect_peer(conn
->ibc_peer
);
3364 kiblnd_peer_decref(conn
->ibc_peer
);
3365 LIBCFS_FREE(conn
, sizeof(*conn
));
3367 spin_lock_irqsave(lock
, flags
);
3370 /* careful with the jiffy wrap... */
3371 timeout
= (int)(deadline
- jiffies
);
3375 int chunk
= kiblnd_data
.kib_peer_hash_size
;
3377 spin_unlock_irqrestore(lock
, flags
);
3381 * Time to check for RDMA timeouts on a few more
3382 * peers: I do checks every 'p' seconds on a
3383 * proportion of the peer table and I need to check
3384 * every connection 'n' times within a timeout
3385 * interval, to ensure I detect a timeout on any
3386 * connection within (n+1)/n times the timeout
3389 if (*kiblnd_tunables
.kib_timeout
> n
* p
)
3390 chunk
= (chunk
* n
* p
) /
3391 *kiblnd_tunables
.kib_timeout
;
3395 for (i
= 0; i
< chunk
; i
++) {
3396 kiblnd_check_conns(peer_index
);
3397 peer_index
= (peer_index
+ 1) %
3398 kiblnd_data
.kib_peer_hash_size
;
3401 deadline
+= msecs_to_jiffies(p
* MSEC_PER_SEC
);
3402 spin_lock_irqsave(lock
, flags
);
3408 /* Nothing to do for 'timeout' */
3409 set_current_state(TASK_INTERRUPTIBLE
);
3410 add_wait_queue(&kiblnd_data
.kib_connd_waitq
, &wait
);
3411 spin_unlock_irqrestore(lock
, flags
);
3413 schedule_timeout(timeout
);
3415 remove_wait_queue(&kiblnd_data
.kib_connd_waitq
, &wait
);
3416 spin_lock_irqsave(lock
, flags
);
3419 spin_unlock_irqrestore(lock
, flags
);
3421 kiblnd_thread_fini();
3426 kiblnd_qp_event(struct ib_event
*event
, void *arg
)
3428 struct kib_conn
*conn
= arg
;
3430 switch (event
->event
) {
3431 case IB_EVENT_COMM_EST
:
3432 CDEBUG(D_NET
, "%s established\n",
3433 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
));
3435 * We received a packet but connection isn't established
3436 * probably handshake packet was lost, so free to
3437 * force make connection established
3439 rdma_notify(conn
->ibc_cmid
, IB_EVENT_COMM_EST
);
3443 CERROR("%s: Async QP event type %d\n",
3444 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
), event
->event
);
3450 kiblnd_complete(struct ib_wc
*wc
)
3452 switch (kiblnd_wreqid2type(wc
->wr_id
)) {
3457 if (wc
->status
!= IB_WC_SUCCESS
&&
3458 wc
->status
!= IB_WC_WR_FLUSH_ERR
)
3459 CNETERR("FastReg failed: %d\n", wc
->status
);
3462 case IBLND_WID_RDMA
:
3464 * We only get RDMA completion notification if it fails. All
3465 * subsequent work items, including the final SEND will fail
3466 * too. However we can't print out any more info about the
3467 * failing RDMA because 'tx' might be back on the idle list or
3468 * even reused already if we didn't manage to post all our work
3471 CNETERR("RDMA (tx: %p) failed: %d\n",
3472 kiblnd_wreqid2ptr(wc
->wr_id
), wc
->status
);
3476 kiblnd_tx_complete(kiblnd_wreqid2ptr(wc
->wr_id
), wc
->status
);
3480 kiblnd_rx_complete(kiblnd_wreqid2ptr(wc
->wr_id
), wc
->status
,
3487 kiblnd_cq_completion(struct ib_cq
*cq
, void *arg
)
3490 * NB I'm not allowed to schedule this conn once its refcount has
3491 * reached 0. Since fundamentally I'm racing with scheduler threads
3492 * consuming my CQ I could be called after all completions have
3493 * occurred. But in this case, !ibc_nrx && !ibc_nsends_posted
3494 * and this CQ is about to be destroyed so I NOOP.
3496 struct kib_conn
*conn
= arg
;
3497 struct kib_sched_info
*sched
= conn
->ibc_sched
;
3498 unsigned long flags
;
3500 LASSERT(cq
== conn
->ibc_cq
);
3502 spin_lock_irqsave(&sched
->ibs_lock
, flags
);
3504 conn
->ibc_ready
= 1;
3506 if (!conn
->ibc_scheduled
&&
3507 (conn
->ibc_nrx
> 0 ||
3508 conn
->ibc_nsends_posted
> 0)) {
3509 kiblnd_conn_addref(conn
); /* +1 ref for sched_conns */
3510 conn
->ibc_scheduled
= 1;
3511 list_add_tail(&conn
->ibc_sched_list
, &sched
->ibs_conns
);
3513 if (waitqueue_active(&sched
->ibs_waitq
))
3514 wake_up(&sched
->ibs_waitq
);
3517 spin_unlock_irqrestore(&sched
->ibs_lock
, flags
);
3521 kiblnd_cq_event(struct ib_event
*event
, void *arg
)
3523 struct kib_conn
*conn
= arg
;
3525 CERROR("%s: async CQ event type %d\n",
3526 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
), event
->event
);
3530 kiblnd_scheduler(void *arg
)
3532 long id
= (long)arg
;
3533 struct kib_sched_info
*sched
;
3534 struct kib_conn
*conn
;
3535 wait_queue_entry_t wait
;
3536 unsigned long flags
;
3542 cfs_block_allsigs();
3544 init_waitqueue_entry(&wait
, current
);
3546 sched
= kiblnd_data
.kib_scheds
[KIB_THREAD_CPT(id
)];
3548 rc
= cfs_cpt_bind(lnet_cpt_table(), sched
->ibs_cpt
);
3550 CWARN("Unable to bind on CPU partition %d, please verify whether all CPUs are healthy and reload modules if necessary, otherwise your system might under risk of low performance\n",
3554 spin_lock_irqsave(&sched
->ibs_lock
, flags
);
3556 while (!kiblnd_data
.kib_shutdown
) {
3557 if (busy_loops
++ >= IBLND_RESCHED
) {
3558 spin_unlock_irqrestore(&sched
->ibs_lock
, flags
);
3563 spin_lock_irqsave(&sched
->ibs_lock
, flags
);
3568 if (!list_empty(&sched
->ibs_conns
)) {
3569 conn
= list_entry(sched
->ibs_conns
.next
, struct kib_conn
,
3571 /* take over kib_sched_conns' ref on conn... */
3572 LASSERT(conn
->ibc_scheduled
);
3573 list_del(&conn
->ibc_sched_list
);
3574 conn
->ibc_ready
= 0;
3576 spin_unlock_irqrestore(&sched
->ibs_lock
, flags
);
3578 wc
.wr_id
= IBLND_WID_INVAL
;
3580 rc
= ib_poll_cq(conn
->ibc_cq
, 1, &wc
);
3582 rc
= ib_req_notify_cq(conn
->ibc_cq
,
3585 CWARN("%s: ib_req_notify_cq failed: %d, closing connection\n",
3586 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
), rc
);
3587 kiblnd_close_conn(conn
, -EIO
);
3588 kiblnd_conn_decref(conn
);
3589 spin_lock_irqsave(&sched
->ibs_lock
,
3594 rc
= ib_poll_cq(conn
->ibc_cq
, 1, &wc
);
3597 if (unlikely(rc
> 0 && wc
.wr_id
== IBLND_WID_INVAL
)) {
3598 LCONSOLE_ERROR("ib_poll_cq (rc: %d) returned invalid wr_id, opcode %d, status: %d, vendor_err: %d, conn: %s status: %d\nplease upgrade firmware and OFED or contact vendor.\n",
3599 rc
, wc
.opcode
, wc
.status
,
3601 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
),
3607 CWARN("%s: ib_poll_cq failed: %d, closing connection\n",
3608 libcfs_nid2str(conn
->ibc_peer
->ibp_nid
),
3610 kiblnd_close_conn(conn
, -EIO
);
3611 kiblnd_conn_decref(conn
);
3612 spin_lock_irqsave(&sched
->ibs_lock
, flags
);
3616 spin_lock_irqsave(&sched
->ibs_lock
, flags
);
3618 if (rc
|| conn
->ibc_ready
) {
3620 * There may be another completion waiting; get
3621 * another scheduler to check while I handle
3624 /* +1 ref for sched_conns */
3625 kiblnd_conn_addref(conn
);
3626 list_add_tail(&conn
->ibc_sched_list
,
3628 if (waitqueue_active(&sched
->ibs_waitq
))
3629 wake_up(&sched
->ibs_waitq
);
3631 conn
->ibc_scheduled
= 0;
3635 spin_unlock_irqrestore(&sched
->ibs_lock
, flags
);
3636 kiblnd_complete(&wc
);
3638 spin_lock_irqsave(&sched
->ibs_lock
, flags
);
3641 kiblnd_conn_decref(conn
); /* ...drop my ref from above */
3648 set_current_state(TASK_INTERRUPTIBLE
);
3649 add_wait_queue_exclusive(&sched
->ibs_waitq
, &wait
);
3650 spin_unlock_irqrestore(&sched
->ibs_lock
, flags
);
3655 remove_wait_queue(&sched
->ibs_waitq
, &wait
);
3656 spin_lock_irqsave(&sched
->ibs_lock
, flags
);
3659 spin_unlock_irqrestore(&sched
->ibs_lock
, flags
);
3661 kiblnd_thread_fini();
3666 kiblnd_failover_thread(void *arg
)
3668 rwlock_t
*glock
= &kiblnd_data
.kib_global_lock
;
3669 struct kib_dev
*dev
;
3670 wait_queue_entry_t wait
;
3671 unsigned long flags
;
3674 LASSERT(*kiblnd_tunables
.kib_dev_failover
);
3676 cfs_block_allsigs();
3678 init_waitqueue_entry(&wait
, current
);
3679 write_lock_irqsave(glock
, flags
);
3681 while (!kiblnd_data
.kib_shutdown
) {
3682 int do_failover
= 0;
3685 list_for_each_entry(dev
, &kiblnd_data
.kib_failed_devs
,
3687 if (time_before(cfs_time_current(),
3688 dev
->ibd_next_failover
))
3695 list_del_init(&dev
->ibd_fail_list
);
3696 dev
->ibd_failover
= 1;
3697 write_unlock_irqrestore(glock
, flags
);
3699 rc
= kiblnd_dev_failover(dev
);
3701 write_lock_irqsave(glock
, flags
);
3703 LASSERT(dev
->ibd_failover
);
3704 dev
->ibd_failover
= 0;
3705 if (rc
>= 0) { /* Device is OK or failover succeed */
3706 dev
->ibd_next_failover
= cfs_time_shift(3);
3710 /* failed to failover, retry later */
3711 dev
->ibd_next_failover
=
3712 cfs_time_shift(min(dev
->ibd_failed_failover
, 10));
3713 if (kiblnd_dev_can_failover(dev
)) {
3714 list_add_tail(&dev
->ibd_fail_list
,
3715 &kiblnd_data
.kib_failed_devs
);
3721 /* long sleep if no more pending failover */
3722 long_sleep
= list_empty(&kiblnd_data
.kib_failed_devs
);
3724 set_current_state(TASK_INTERRUPTIBLE
);
3725 add_wait_queue(&kiblnd_data
.kib_failover_waitq
, &wait
);
3726 write_unlock_irqrestore(glock
, flags
);
3728 rc
= schedule_timeout(long_sleep
? cfs_time_seconds(10) :
3729 cfs_time_seconds(1));
3730 remove_wait_queue(&kiblnd_data
.kib_failover_waitq
, &wait
);
3731 write_lock_irqsave(glock
, flags
);
3733 if (!long_sleep
|| rc
)
3737 * have a long sleep, routine check all active devices,
3738 * we need checking like this because if there is not active
3739 * connection on the dev and no SEND from local, we may listen
3740 * on wrong HCA for ever while there is a bonding failover
3742 list_for_each_entry(dev
, &kiblnd_data
.kib_devs
, ibd_list
) {
3743 if (kiblnd_dev_can_failover(dev
)) {
3744 list_add_tail(&dev
->ibd_fail_list
,
3745 &kiblnd_data
.kib_failed_devs
);
3750 write_unlock_irqrestore(glock
, flags
);
3752 kiblnd_thread_fini();