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d7e09d03 PT |
1 | /* |
2 | * GPL HEADER START | |
3 | * | |
4 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
5 | * | |
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. | |
9 | * | |
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). | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * version 2 along with this program; If not, see | |
18 | * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf | |
19 | * | |
20 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
21 | * CA 95054 USA or visit www.sun.com if you need additional information or | |
22 | * have any questions. | |
23 | * | |
24 | * GPL HEADER END | |
25 | */ | |
26 | /* | |
27 | * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. | |
28 | * Use is subject to license terms. | |
29 | * | |
30 | * Copyright (c) 2012, Intel Corporation. | |
31 | */ | |
32 | /* | |
33 | * This file is part of Lustre, http://www.lustre.org/ | |
34 | * Lustre is a trademark of Sun Microsystems, Inc. | |
35 | * | |
36 | * lnet/klnds/o2iblnd/o2iblnd_cb.c | |
37 | * | |
38 | * Author: Eric Barton <eric@bartonsoftware.com> | |
39 | */ | |
40 | ||
41 | #include "o2iblnd.h" | |
42 | ||
43 | void | |
44 | kiblnd_tx_done (lnet_ni_t *ni, kib_tx_t *tx) | |
45 | { | |
46 | lnet_msg_t *lntmsg[2]; | |
47 | kib_net_t *net = ni->ni_data; | |
48 | int rc; | |
49 | int i; | |
50 | ||
51 | LASSERT (net != NULL); | |
52 | LASSERT (!in_interrupt()); | |
53 | LASSERT (!tx->tx_queued); /* mustn't be queued for sending */ | |
54 | LASSERT (tx->tx_sending == 0); /* mustn't be awaiting sent callback */ | |
55 | LASSERT (!tx->tx_waiting); /* mustn't be awaiting peer response */ | |
56 | LASSERT (tx->tx_pool != NULL); | |
57 | ||
58 | kiblnd_unmap_tx(ni, tx); | |
59 | ||
60 | /* tx may have up to 2 lnet msgs to finalise */ | |
61 | lntmsg[0] = tx->tx_lntmsg[0]; tx->tx_lntmsg[0] = NULL; | |
62 | lntmsg[1] = tx->tx_lntmsg[1]; tx->tx_lntmsg[1] = NULL; | |
63 | rc = tx->tx_status; | |
64 | ||
65 | if (tx->tx_conn != NULL) { | |
66 | LASSERT (ni == tx->tx_conn->ibc_peer->ibp_ni); | |
67 | ||
68 | kiblnd_conn_decref(tx->tx_conn); | |
69 | tx->tx_conn = NULL; | |
70 | } | |
71 | ||
72 | tx->tx_nwrq = 0; | |
73 | tx->tx_status = 0; | |
74 | ||
75 | kiblnd_pool_free_node(&tx->tx_pool->tpo_pool, &tx->tx_list); | |
76 | ||
77 | /* delay finalize until my descs have been freed */ | |
78 | for (i = 0; i < 2; i++) { | |
79 | if (lntmsg[i] == NULL) | |
80 | continue; | |
81 | ||
82 | lnet_finalize(ni, lntmsg[i], rc); | |
83 | } | |
84 | } | |
85 | ||
86 | void | |
87 | kiblnd_txlist_done (lnet_ni_t *ni, struct list_head *txlist, int status) | |
88 | { | |
89 | kib_tx_t *tx; | |
90 | ||
91 | while (!list_empty (txlist)) { | |
92 | tx = list_entry (txlist->next, kib_tx_t, tx_list); | |
93 | ||
94 | list_del(&tx->tx_list); | |
95 | /* complete now */ | |
96 | tx->tx_waiting = 0; | |
97 | tx->tx_status = status; | |
98 | kiblnd_tx_done(ni, tx); | |
99 | } | |
100 | } | |
101 | ||
102 | kib_tx_t * | |
103 | kiblnd_get_idle_tx(lnet_ni_t *ni, lnet_nid_t target) | |
104 | { | |
105 | kib_net_t *net = (kib_net_t *)ni->ni_data; | |
106 | struct list_head *node; | |
107 | kib_tx_t *tx; | |
108 | kib_tx_poolset_t *tps; | |
109 | ||
110 | tps = net->ibn_tx_ps[lnet_cpt_of_nid(target)]; | |
111 | node = kiblnd_pool_alloc_node(&tps->tps_poolset); | |
112 | if (node == NULL) | |
113 | return NULL; | |
114 | tx = container_of(node, kib_tx_t, tx_list); | |
115 | ||
116 | LASSERT (tx->tx_nwrq == 0); | |
117 | LASSERT (!tx->tx_queued); | |
118 | LASSERT (tx->tx_sending == 0); | |
119 | LASSERT (!tx->tx_waiting); | |
120 | LASSERT (tx->tx_status == 0); | |
121 | LASSERT (tx->tx_conn == NULL); | |
122 | LASSERT (tx->tx_lntmsg[0] == NULL); | |
123 | LASSERT (tx->tx_lntmsg[1] == NULL); | |
124 | LASSERT (tx->tx_u.pmr == NULL); | |
125 | LASSERT (tx->tx_nfrags == 0); | |
126 | ||
127 | return tx; | |
128 | } | |
129 | ||
130 | void | |
131 | kiblnd_drop_rx(kib_rx_t *rx) | |
132 | { | |
133 | kib_conn_t *conn = rx->rx_conn; | |
134 | struct kib_sched_info *sched = conn->ibc_sched; | |
135 | unsigned long flags; | |
136 | ||
137 | spin_lock_irqsave(&sched->ibs_lock, flags); | |
138 | LASSERT(conn->ibc_nrx > 0); | |
139 | conn->ibc_nrx--; | |
140 | spin_unlock_irqrestore(&sched->ibs_lock, flags); | |
141 | ||
142 | kiblnd_conn_decref(conn); | |
143 | } | |
144 | ||
145 | int | |
146 | kiblnd_post_rx (kib_rx_t *rx, int credit) | |
147 | { | |
148 | kib_conn_t *conn = rx->rx_conn; | |
149 | kib_net_t *net = conn->ibc_peer->ibp_ni->ni_data; | |
150 | struct ib_recv_wr *bad_wrq = NULL; | |
151 | struct ib_mr *mr; | |
152 | int rc; | |
153 | ||
154 | LASSERT (net != NULL); | |
155 | LASSERT (!in_interrupt()); | |
156 | LASSERT (credit == IBLND_POSTRX_NO_CREDIT || | |
157 | credit == IBLND_POSTRX_PEER_CREDIT || | |
158 | credit == IBLND_POSTRX_RSRVD_CREDIT); | |
159 | ||
160 | mr = kiblnd_find_dma_mr(conn->ibc_hdev, rx->rx_msgaddr, IBLND_MSG_SIZE); | |
161 | LASSERT (mr != NULL); | |
162 | ||
163 | rx->rx_sge.lkey = mr->lkey; | |
164 | rx->rx_sge.addr = rx->rx_msgaddr; | |
165 | rx->rx_sge.length = IBLND_MSG_SIZE; | |
166 | ||
167 | rx->rx_wrq.next = NULL; | |
168 | rx->rx_wrq.sg_list = &rx->rx_sge; | |
169 | rx->rx_wrq.num_sge = 1; | |
170 | rx->rx_wrq.wr_id = kiblnd_ptr2wreqid(rx, IBLND_WID_RX); | |
171 | ||
172 | LASSERT (conn->ibc_state >= IBLND_CONN_INIT); | |
173 | LASSERT (rx->rx_nob >= 0); /* not posted */ | |
174 | ||
175 | if (conn->ibc_state > IBLND_CONN_ESTABLISHED) { | |
176 | kiblnd_drop_rx(rx); /* No more posts for this rx */ | |
177 | return 0; | |
178 | } | |
179 | ||
180 | rx->rx_nob = -1; /* flag posted */ | |
181 | ||
182 | rc = ib_post_recv(conn->ibc_cmid->qp, &rx->rx_wrq, &bad_wrq); | |
183 | if (rc != 0) { | |
184 | CERROR("Can't post rx for %s: %d, bad_wrq: %p\n", | |
185 | libcfs_nid2str(conn->ibc_peer->ibp_nid), rc, bad_wrq); | |
186 | rx->rx_nob = 0; | |
187 | } | |
188 | ||
189 | if (conn->ibc_state < IBLND_CONN_ESTABLISHED) /* Initial post */ | |
190 | return rc; | |
191 | ||
192 | if (rc != 0) { | |
193 | kiblnd_close_conn(conn, rc); | |
194 | kiblnd_drop_rx(rx); /* No more posts for this rx */ | |
195 | return rc; | |
196 | } | |
197 | ||
198 | if (credit == IBLND_POSTRX_NO_CREDIT) | |
199 | return 0; | |
200 | ||
201 | spin_lock(&conn->ibc_lock); | |
202 | if (credit == IBLND_POSTRX_PEER_CREDIT) | |
203 | conn->ibc_outstanding_credits++; | |
204 | else | |
205 | conn->ibc_reserved_credits++; | |
206 | spin_unlock(&conn->ibc_lock); | |
207 | ||
208 | kiblnd_check_sends(conn); | |
209 | return 0; | |
210 | } | |
211 | ||
212 | kib_tx_t * | |
213 | kiblnd_find_waiting_tx_locked(kib_conn_t *conn, int txtype, __u64 cookie) | |
214 | { | |
215 | struct list_head *tmp; | |
216 | ||
217 | list_for_each(tmp, &conn->ibc_active_txs) { | |
218 | kib_tx_t *tx = list_entry(tmp, kib_tx_t, tx_list); | |
219 | ||
220 | LASSERT (!tx->tx_queued); | |
221 | LASSERT (tx->tx_sending != 0 || tx->tx_waiting); | |
222 | ||
223 | if (tx->tx_cookie != cookie) | |
224 | continue; | |
225 | ||
226 | if (tx->tx_waiting && | |
227 | tx->tx_msg->ibm_type == txtype) | |
228 | return tx; | |
229 | ||
230 | CWARN("Bad completion: %swaiting, type %x (wanted %x)\n", | |
231 | tx->tx_waiting ? "" : "NOT ", | |
232 | tx->tx_msg->ibm_type, txtype); | |
233 | } | |
234 | return NULL; | |
235 | } | |
236 | ||
237 | void | |
238 | kiblnd_handle_completion(kib_conn_t *conn, int txtype, int status, __u64 cookie) | |
239 | { | |
240 | kib_tx_t *tx; | |
241 | lnet_ni_t *ni = conn->ibc_peer->ibp_ni; | |
242 | int idle; | |
243 | ||
244 | spin_lock(&conn->ibc_lock); | |
245 | ||
246 | tx = kiblnd_find_waiting_tx_locked(conn, txtype, cookie); | |
247 | if (tx == NULL) { | |
248 | spin_unlock(&conn->ibc_lock); | |
249 | ||
250 | CWARN("Unmatched completion type %x cookie "LPX64" from %s\n", | |
251 | txtype, cookie, libcfs_nid2str(conn->ibc_peer->ibp_nid)); | |
252 | kiblnd_close_conn(conn, -EPROTO); | |
253 | return; | |
254 | } | |
255 | ||
256 | if (tx->tx_status == 0) { /* success so far */ | |
257 | if (status < 0) { /* failed? */ | |
258 | tx->tx_status = status; | |
259 | } else if (txtype == IBLND_MSG_GET_REQ) { | |
260 | lnet_set_reply_msg_len(ni, tx->tx_lntmsg[1], status); | |
261 | } | |
262 | } | |
263 | ||
264 | tx->tx_waiting = 0; | |
265 | ||
266 | idle = !tx->tx_queued && (tx->tx_sending == 0); | |
267 | if (idle) | |
268 | list_del(&tx->tx_list); | |
269 | ||
270 | spin_unlock(&conn->ibc_lock); | |
271 | ||
272 | if (idle) | |
273 | kiblnd_tx_done(ni, tx); | |
274 | } | |
275 | ||
276 | void | |
277 | kiblnd_send_completion(kib_conn_t *conn, int type, int status, __u64 cookie) | |
278 | { | |
279 | lnet_ni_t *ni = conn->ibc_peer->ibp_ni; | |
280 | kib_tx_t *tx = kiblnd_get_idle_tx(ni, conn->ibc_peer->ibp_nid); | |
281 | ||
282 | if (tx == NULL) { | |
283 | CERROR("Can't get tx for completion %x for %s\n", | |
284 | type, libcfs_nid2str(conn->ibc_peer->ibp_nid)); | |
285 | return; | |
286 | } | |
287 | ||
288 | tx->tx_msg->ibm_u.completion.ibcm_status = status; | |
289 | tx->tx_msg->ibm_u.completion.ibcm_cookie = cookie; | |
290 | kiblnd_init_tx_msg(ni, tx, type, sizeof(kib_completion_msg_t)); | |
291 | ||
292 | kiblnd_queue_tx(tx, conn); | |
293 | } | |
294 | ||
295 | void | |
296 | kiblnd_handle_rx (kib_rx_t *rx) | |
297 | { | |
298 | kib_msg_t *msg = rx->rx_msg; | |
299 | kib_conn_t *conn = rx->rx_conn; | |
300 | lnet_ni_t *ni = conn->ibc_peer->ibp_ni; | |
301 | int credits = msg->ibm_credits; | |
302 | kib_tx_t *tx; | |
303 | int rc = 0; | |
304 | int rc2; | |
305 | int post_credit; | |
306 | ||
307 | LASSERT (conn->ibc_state >= IBLND_CONN_ESTABLISHED); | |
308 | ||
309 | CDEBUG (D_NET, "Received %x[%d] from %s\n", | |
310 | msg->ibm_type, credits, | |
311 | libcfs_nid2str(conn->ibc_peer->ibp_nid)); | |
312 | ||
313 | if (credits != 0) { | |
314 | /* Have I received credits that will let me send? */ | |
315 | spin_lock(&conn->ibc_lock); | |
316 | ||
317 | if (conn->ibc_credits + credits > | |
318 | IBLND_MSG_QUEUE_SIZE(conn->ibc_version)) { | |
319 | rc2 = conn->ibc_credits; | |
320 | spin_unlock(&conn->ibc_lock); | |
321 | ||
322 | CERROR("Bad credits from %s: %d + %d > %d\n", | |
323 | libcfs_nid2str(conn->ibc_peer->ibp_nid), | |
324 | rc2, credits, | |
325 | IBLND_MSG_QUEUE_SIZE(conn->ibc_version)); | |
326 | ||
327 | kiblnd_close_conn(conn, -EPROTO); | |
328 | kiblnd_post_rx(rx, IBLND_POSTRX_NO_CREDIT); | |
329 | return; | |
330 | } | |
331 | ||
332 | conn->ibc_credits += credits; | |
333 | ||
334 | /* This ensures the credit taken by NOOP can be returned */ | |
335 | if (msg->ibm_type == IBLND_MSG_NOOP && | |
336 | !IBLND_OOB_CAPABLE(conn->ibc_version)) /* v1 only */ | |
337 | conn->ibc_outstanding_credits++; | |
338 | ||
339 | spin_unlock(&conn->ibc_lock); | |
340 | kiblnd_check_sends(conn); | |
341 | } | |
342 | ||
343 | switch (msg->ibm_type) { | |
344 | default: | |
345 | CERROR("Bad IBLND message type %x from %s\n", | |
346 | msg->ibm_type, libcfs_nid2str(conn->ibc_peer->ibp_nid)); | |
347 | post_credit = IBLND_POSTRX_NO_CREDIT; | |
348 | rc = -EPROTO; | |
349 | break; | |
350 | ||
351 | case IBLND_MSG_NOOP: | |
352 | if (IBLND_OOB_CAPABLE(conn->ibc_version)) { | |
353 | post_credit = IBLND_POSTRX_NO_CREDIT; | |
354 | break; | |
355 | } | |
356 | ||
357 | if (credits != 0) /* credit already posted */ | |
358 | post_credit = IBLND_POSTRX_NO_CREDIT; | |
359 | else /* a keepalive NOOP */ | |
360 | post_credit = IBLND_POSTRX_PEER_CREDIT; | |
361 | break; | |
362 | ||
363 | case IBLND_MSG_IMMEDIATE: | |
364 | post_credit = IBLND_POSTRX_DONT_POST; | |
365 | rc = lnet_parse(ni, &msg->ibm_u.immediate.ibim_hdr, | |
366 | msg->ibm_srcnid, rx, 0); | |
367 | if (rc < 0) /* repost on error */ | |
368 | post_credit = IBLND_POSTRX_PEER_CREDIT; | |
369 | break; | |
370 | ||
371 | case IBLND_MSG_PUT_REQ: | |
372 | post_credit = IBLND_POSTRX_DONT_POST; | |
373 | rc = lnet_parse(ni, &msg->ibm_u.putreq.ibprm_hdr, | |
374 | msg->ibm_srcnid, rx, 1); | |
375 | if (rc < 0) /* repost on error */ | |
376 | post_credit = IBLND_POSTRX_PEER_CREDIT; | |
377 | break; | |
378 | ||
379 | case IBLND_MSG_PUT_NAK: | |
380 | CWARN ("PUT_NACK from %s\n", | |
381 | libcfs_nid2str(conn->ibc_peer->ibp_nid)); | |
382 | post_credit = IBLND_POSTRX_RSRVD_CREDIT; | |
383 | kiblnd_handle_completion(conn, IBLND_MSG_PUT_REQ, | |
384 | msg->ibm_u.completion.ibcm_status, | |
385 | msg->ibm_u.completion.ibcm_cookie); | |
386 | break; | |
387 | ||
388 | case IBLND_MSG_PUT_ACK: | |
389 | post_credit = IBLND_POSTRX_RSRVD_CREDIT; | |
390 | ||
391 | spin_lock(&conn->ibc_lock); | |
392 | tx = kiblnd_find_waiting_tx_locked(conn, IBLND_MSG_PUT_REQ, | |
393 | msg->ibm_u.putack.ibpam_src_cookie); | |
394 | if (tx != NULL) | |
395 | list_del(&tx->tx_list); | |
396 | spin_unlock(&conn->ibc_lock); | |
397 | ||
398 | if (tx == NULL) { | |
399 | CERROR("Unmatched PUT_ACK from %s\n", | |
400 | libcfs_nid2str(conn->ibc_peer->ibp_nid)); | |
401 | rc = -EPROTO; | |
402 | break; | |
403 | } | |
404 | ||
405 | LASSERT (tx->tx_waiting); | |
406 | /* CAVEAT EMPTOR: I could be racing with tx_complete, but... | |
407 | * (a) I can overwrite tx_msg since my peer has received it! | |
408 | * (b) tx_waiting set tells tx_complete() it's not done. */ | |
409 | ||
410 | tx->tx_nwrq = 0; /* overwrite PUT_REQ */ | |
411 | ||
412 | rc2 = kiblnd_init_rdma(conn, tx, IBLND_MSG_PUT_DONE, | |
413 | kiblnd_rd_size(&msg->ibm_u.putack.ibpam_rd), | |
414 | &msg->ibm_u.putack.ibpam_rd, | |
415 | msg->ibm_u.putack.ibpam_dst_cookie); | |
416 | if (rc2 < 0) | |
417 | CERROR("Can't setup rdma for PUT to %s: %d\n", | |
418 | libcfs_nid2str(conn->ibc_peer->ibp_nid), rc2); | |
419 | ||
420 | spin_lock(&conn->ibc_lock); | |
421 | tx->tx_waiting = 0; /* clear waiting and queue atomically */ | |
422 | kiblnd_queue_tx_locked(tx, conn); | |
423 | spin_unlock(&conn->ibc_lock); | |
424 | break; | |
425 | ||
426 | case IBLND_MSG_PUT_DONE: | |
427 | post_credit = IBLND_POSTRX_PEER_CREDIT; | |
428 | kiblnd_handle_completion(conn, IBLND_MSG_PUT_ACK, | |
429 | msg->ibm_u.completion.ibcm_status, | |
430 | msg->ibm_u.completion.ibcm_cookie); | |
431 | break; | |
432 | ||
433 | case IBLND_MSG_GET_REQ: | |
434 | post_credit = IBLND_POSTRX_DONT_POST; | |
435 | rc = lnet_parse(ni, &msg->ibm_u.get.ibgm_hdr, | |
436 | msg->ibm_srcnid, rx, 1); | |
437 | if (rc < 0) /* repost on error */ | |
438 | post_credit = IBLND_POSTRX_PEER_CREDIT; | |
439 | break; | |
440 | ||
441 | case IBLND_MSG_GET_DONE: | |
442 | post_credit = IBLND_POSTRX_RSRVD_CREDIT; | |
443 | kiblnd_handle_completion(conn, IBLND_MSG_GET_REQ, | |
444 | msg->ibm_u.completion.ibcm_status, | |
445 | msg->ibm_u.completion.ibcm_cookie); | |
446 | break; | |
447 | } | |
448 | ||
449 | if (rc < 0) /* protocol error */ | |
450 | kiblnd_close_conn(conn, rc); | |
451 | ||
452 | if (post_credit != IBLND_POSTRX_DONT_POST) | |
453 | kiblnd_post_rx(rx, post_credit); | |
454 | } | |
455 | ||
456 | void | |
457 | kiblnd_rx_complete (kib_rx_t *rx, int status, int nob) | |
458 | { | |
459 | kib_msg_t *msg = rx->rx_msg; | |
460 | kib_conn_t *conn = rx->rx_conn; | |
461 | lnet_ni_t *ni = conn->ibc_peer->ibp_ni; | |
462 | kib_net_t *net = ni->ni_data; | |
463 | int rc; | |
464 | int err = -EIO; | |
465 | ||
466 | LASSERT (net != NULL); | |
467 | LASSERT (rx->rx_nob < 0); /* was posted */ | |
468 | rx->rx_nob = 0; /* isn't now */ | |
469 | ||
470 | if (conn->ibc_state > IBLND_CONN_ESTABLISHED) | |
471 | goto ignore; | |
472 | ||
473 | if (status != IB_WC_SUCCESS) { | |
474 | CNETERR("Rx from %s failed: %d\n", | |
475 | libcfs_nid2str(conn->ibc_peer->ibp_nid), status); | |
476 | goto failed; | |
477 | } | |
478 | ||
479 | LASSERT (nob >= 0); | |
480 | rx->rx_nob = nob; | |
481 | ||
482 | rc = kiblnd_unpack_msg(msg, rx->rx_nob); | |
483 | if (rc != 0) { | |
484 | CERROR ("Error %d unpacking rx from %s\n", | |
485 | rc, libcfs_nid2str(conn->ibc_peer->ibp_nid)); | |
486 | goto failed; | |
487 | } | |
488 | ||
489 | if (msg->ibm_srcnid != conn->ibc_peer->ibp_nid || | |
490 | msg->ibm_dstnid != ni->ni_nid || | |
491 | msg->ibm_srcstamp != conn->ibc_incarnation || | |
492 | msg->ibm_dststamp != net->ibn_incarnation) { | |
493 | CERROR ("Stale rx from %s\n", | |
494 | libcfs_nid2str(conn->ibc_peer->ibp_nid)); | |
495 | err = -ESTALE; | |
496 | goto failed; | |
497 | } | |
498 | ||
499 | /* set time last known alive */ | |
500 | kiblnd_peer_alive(conn->ibc_peer); | |
501 | ||
502 | /* racing with connection establishment/teardown! */ | |
503 | ||
504 | if (conn->ibc_state < IBLND_CONN_ESTABLISHED) { | |
505 | rwlock_t *g_lock = &kiblnd_data.kib_global_lock; | |
506 | unsigned long flags; | |
507 | ||
508 | write_lock_irqsave(g_lock, flags); | |
509 | /* must check holding global lock to eliminate race */ | |
510 | if (conn->ibc_state < IBLND_CONN_ESTABLISHED) { | |
511 | list_add_tail(&rx->rx_list, &conn->ibc_early_rxs); | |
512 | write_unlock_irqrestore(g_lock, flags); | |
513 | return; | |
514 | } | |
515 | write_unlock_irqrestore(g_lock, flags); | |
516 | } | |
517 | kiblnd_handle_rx(rx); | |
518 | return; | |
519 | ||
520 | failed: | |
521 | CDEBUG(D_NET, "rx %p conn %p\n", rx, conn); | |
522 | kiblnd_close_conn(conn, err); | |
523 | ignore: | |
524 | kiblnd_drop_rx(rx); /* Don't re-post rx. */ | |
525 | } | |
526 | ||
527 | struct page * | |
528 | kiblnd_kvaddr_to_page (unsigned long vaddr) | |
529 | { | |
530 | struct page *page; | |
531 | ||
175f5475 | 532 | if (is_vmalloc_addr(vaddr)) { |
d7e09d03 PT |
533 | page = vmalloc_to_page ((void *)vaddr); |
534 | LASSERT (page != NULL); | |
535 | return page; | |
536 | } | |
537 | #ifdef CONFIG_HIGHMEM | |
538 | if (vaddr >= PKMAP_BASE && | |
539 | vaddr < (PKMAP_BASE + LAST_PKMAP * PAGE_SIZE)) { | |
540 | /* No highmem pages only used for bulk (kiov) I/O */ | |
541 | CERROR("find page for address in highmem\n"); | |
542 | LBUG(); | |
543 | } | |
544 | #endif | |
545 | page = virt_to_page (vaddr); | |
546 | LASSERT (page != NULL); | |
547 | return page; | |
548 | } | |
549 | ||
550 | static int | |
551 | kiblnd_fmr_map_tx(kib_net_t *net, kib_tx_t *tx, kib_rdma_desc_t *rd, int nob) | |
552 | { | |
553 | kib_hca_dev_t *hdev; | |
554 | __u64 *pages = tx->tx_pages; | |
555 | kib_fmr_poolset_t *fps; | |
556 | int npages; | |
557 | int size; | |
558 | int cpt; | |
559 | int rc; | |
560 | int i; | |
561 | ||
562 | LASSERT(tx->tx_pool != NULL); | |
563 | LASSERT(tx->tx_pool->tpo_pool.po_owner != NULL); | |
564 | ||
565 | hdev = tx->tx_pool->tpo_hdev; | |
566 | ||
567 | for (i = 0, npages = 0; i < rd->rd_nfrags; i++) { | |
568 | for (size = 0; size < rd->rd_frags[i].rf_nob; | |
569 | size += hdev->ibh_page_size) { | |
570 | pages[npages ++] = (rd->rd_frags[i].rf_addr & | |
571 | hdev->ibh_page_mask) + size; | |
572 | } | |
573 | } | |
574 | ||
575 | cpt = tx->tx_pool->tpo_pool.po_owner->ps_cpt; | |
576 | ||
577 | fps = net->ibn_fmr_ps[cpt]; | |
578 | rc = kiblnd_fmr_pool_map(fps, pages, npages, 0, &tx->tx_u.fmr); | |
579 | if (rc != 0) { | |
580 | CERROR ("Can't map %d pages: %d\n", npages, rc); | |
581 | return rc; | |
582 | } | |
583 | ||
584 | /* If rd is not tx_rd, it's going to get sent to a peer, who will need | |
585 | * the rkey */ | |
586 | rd->rd_key = (rd != tx->tx_rd) ? tx->tx_u.fmr.fmr_pfmr->fmr->rkey : | |
587 | tx->tx_u.fmr.fmr_pfmr->fmr->lkey; | |
588 | rd->rd_frags[0].rf_addr &= ~hdev->ibh_page_mask; | |
589 | rd->rd_frags[0].rf_nob = nob; | |
590 | rd->rd_nfrags = 1; | |
591 | ||
592 | return 0; | |
593 | } | |
594 | ||
595 | static int | |
596 | kiblnd_pmr_map_tx(kib_net_t *net, kib_tx_t *tx, kib_rdma_desc_t *rd, int nob) | |
597 | { | |
598 | kib_hca_dev_t *hdev; | |
599 | kib_pmr_poolset_t *pps; | |
600 | __u64 iova; | |
601 | int cpt; | |
602 | int rc; | |
603 | ||
604 | LASSERT(tx->tx_pool != NULL); | |
605 | LASSERT(tx->tx_pool->tpo_pool.po_owner != NULL); | |
606 | ||
607 | hdev = tx->tx_pool->tpo_hdev; | |
608 | ||
609 | iova = rd->rd_frags[0].rf_addr & ~hdev->ibh_page_mask; | |
610 | ||
611 | cpt = tx->tx_pool->tpo_pool.po_owner->ps_cpt; | |
612 | ||
613 | pps = net->ibn_pmr_ps[cpt]; | |
614 | rc = kiblnd_pmr_pool_map(pps, hdev, rd, &iova, &tx->tx_u.pmr); | |
615 | if (rc != 0) { | |
616 | CERROR("Failed to create MR by phybuf: %d\n", rc); | |
617 | return rc; | |
618 | } | |
619 | ||
620 | /* If rd is not tx_rd, it's going to get sent to a peer, who will need | |
621 | * the rkey */ | |
622 | rd->rd_key = (rd != tx->tx_rd) ? tx->tx_u.pmr->pmr_mr->rkey : | |
623 | tx->tx_u.pmr->pmr_mr->lkey; | |
624 | rd->rd_nfrags = 1; | |
625 | rd->rd_frags[0].rf_addr = iova; | |
626 | rd->rd_frags[0].rf_nob = nob; | |
627 | ||
628 | return 0; | |
629 | } | |
630 | ||
631 | void | |
632 | kiblnd_unmap_tx(lnet_ni_t *ni, kib_tx_t *tx) | |
633 | { | |
634 | kib_net_t *net = ni->ni_data; | |
635 | ||
636 | LASSERT(net != NULL); | |
637 | ||
638 | if (net->ibn_fmr_ps != NULL && tx->tx_u.fmr.fmr_pfmr != NULL) { | |
639 | kiblnd_fmr_pool_unmap(&tx->tx_u.fmr, tx->tx_status); | |
640 | tx->tx_u.fmr.fmr_pfmr = NULL; | |
641 | ||
642 | } else if (net->ibn_pmr_ps != NULL && tx->tx_u.pmr != NULL) { | |
643 | kiblnd_pmr_pool_unmap(tx->tx_u.pmr); | |
644 | tx->tx_u.pmr = NULL; | |
645 | } | |
646 | ||
647 | if (tx->tx_nfrags != 0) { | |
648 | kiblnd_dma_unmap_sg(tx->tx_pool->tpo_hdev->ibh_ibdev, | |
649 | tx->tx_frags, tx->tx_nfrags, tx->tx_dmadir); | |
650 | tx->tx_nfrags = 0; | |
651 | } | |
652 | } | |
653 | ||
654 | int | |
655 | kiblnd_map_tx(lnet_ni_t *ni, kib_tx_t *tx, | |
656 | kib_rdma_desc_t *rd, int nfrags) | |
657 | { | |
658 | kib_hca_dev_t *hdev = tx->tx_pool->tpo_hdev; | |
659 | kib_net_t *net = ni->ni_data; | |
660 | struct ib_mr *mr = NULL; | |
661 | __u32 nob; | |
662 | int i; | |
663 | ||
664 | /* If rd is not tx_rd, it's going to get sent to a peer and I'm the | |
665 | * RDMA sink */ | |
666 | tx->tx_dmadir = (rd != tx->tx_rd) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; | |
667 | tx->tx_nfrags = nfrags; | |
668 | ||
669 | rd->rd_nfrags = | |
670 | kiblnd_dma_map_sg(hdev->ibh_ibdev, | |
671 | tx->tx_frags, tx->tx_nfrags, tx->tx_dmadir); | |
672 | ||
673 | for (i = 0, nob = 0; i < rd->rd_nfrags; i++) { | |
674 | rd->rd_frags[i].rf_nob = kiblnd_sg_dma_len( | |
675 | hdev->ibh_ibdev, &tx->tx_frags[i]); | |
676 | rd->rd_frags[i].rf_addr = kiblnd_sg_dma_address( | |
677 | hdev->ibh_ibdev, &tx->tx_frags[i]); | |
678 | nob += rd->rd_frags[i].rf_nob; | |
679 | } | |
680 | ||
681 | /* looking for pre-mapping MR */ | |
682 | mr = kiblnd_find_rd_dma_mr(hdev, rd); | |
683 | if (mr != NULL) { | |
684 | /* found pre-mapping MR */ | |
685 | rd->rd_key = (rd != tx->tx_rd) ? mr->rkey : mr->lkey; | |
686 | return 0; | |
687 | } | |
688 | ||
689 | if (net->ibn_fmr_ps != NULL) | |
690 | return kiblnd_fmr_map_tx(net, tx, rd, nob); | |
691 | else if (net->ibn_pmr_ps != NULL) | |
692 | return kiblnd_pmr_map_tx(net, tx, rd, nob); | |
693 | ||
694 | return -EINVAL; | |
695 | } | |
696 | ||
697 | ||
698 | int | |
699 | kiblnd_setup_rd_iov(lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd, | |
700 | unsigned int niov, struct iovec *iov, int offset, int nob) | |
701 | { | |
702 | kib_net_t *net = ni->ni_data; | |
703 | struct page *page; | |
704 | struct scatterlist *sg; | |
705 | unsigned long vaddr; | |
706 | int fragnob; | |
707 | int page_offset; | |
708 | ||
709 | LASSERT (nob > 0); | |
710 | LASSERT (niov > 0); | |
711 | LASSERT (net != NULL); | |
712 | ||
713 | while (offset >= iov->iov_len) { | |
714 | offset -= iov->iov_len; | |
715 | niov--; | |
716 | iov++; | |
717 | LASSERT (niov > 0); | |
718 | } | |
719 | ||
720 | sg = tx->tx_frags; | |
721 | do { | |
722 | LASSERT (niov > 0); | |
723 | ||
724 | vaddr = ((unsigned long)iov->iov_base) + offset; | |
725 | page_offset = vaddr & (PAGE_SIZE - 1); | |
726 | page = kiblnd_kvaddr_to_page(vaddr); | |
727 | if (page == NULL) { | |
728 | CERROR ("Can't find page\n"); | |
729 | return -EFAULT; | |
730 | } | |
731 | ||
732 | fragnob = min((int)(iov->iov_len - offset), nob); | |
733 | fragnob = min(fragnob, (int)PAGE_SIZE - page_offset); | |
734 | ||
735 | sg_set_page(sg, page, fragnob, page_offset); | |
736 | sg++; | |
737 | ||
738 | if (offset + fragnob < iov->iov_len) { | |
739 | offset += fragnob; | |
740 | } else { | |
741 | offset = 0; | |
742 | iov++; | |
743 | niov--; | |
744 | } | |
745 | nob -= fragnob; | |
746 | } while (nob > 0); | |
747 | ||
748 | return kiblnd_map_tx(ni, tx, rd, sg - tx->tx_frags); | |
749 | } | |
750 | ||
751 | int | |
752 | kiblnd_setup_rd_kiov (lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd, | |
753 | int nkiov, lnet_kiov_t *kiov, int offset, int nob) | |
754 | { | |
755 | kib_net_t *net = ni->ni_data; | |
756 | struct scatterlist *sg; | |
757 | int fragnob; | |
758 | ||
759 | CDEBUG(D_NET, "niov %d offset %d nob %d\n", nkiov, offset, nob); | |
760 | ||
761 | LASSERT (nob > 0); | |
762 | LASSERT (nkiov > 0); | |
763 | LASSERT (net != NULL); | |
764 | ||
765 | while (offset >= kiov->kiov_len) { | |
766 | offset -= kiov->kiov_len; | |
767 | nkiov--; | |
768 | kiov++; | |
769 | LASSERT (nkiov > 0); | |
770 | } | |
771 | ||
772 | sg = tx->tx_frags; | |
773 | do { | |
774 | LASSERT (nkiov > 0); | |
775 | ||
776 | fragnob = min((int)(kiov->kiov_len - offset), nob); | |
777 | ||
778 | sg_set_page(sg, kiov->kiov_page, fragnob, | |
779 | kiov->kiov_offset + offset); | |
780 | sg++; | |
781 | ||
782 | offset = 0; | |
783 | kiov++; | |
784 | nkiov--; | |
785 | nob -= fragnob; | |
786 | } while (nob > 0); | |
787 | ||
788 | return kiblnd_map_tx(ni, tx, rd, sg - tx->tx_frags); | |
789 | } | |
790 | ||
791 | int | |
792 | kiblnd_post_tx_locked (kib_conn_t *conn, kib_tx_t *tx, int credit) | |
793 | { | |
794 | kib_msg_t *msg = tx->tx_msg; | |
795 | kib_peer_t *peer = conn->ibc_peer; | |
796 | int ver = conn->ibc_version; | |
797 | int rc; | |
798 | int done; | |
799 | struct ib_send_wr *bad_wrq; | |
800 | ||
801 | LASSERT (tx->tx_queued); | |
802 | /* We rely on this for QP sizing */ | |
803 | LASSERT (tx->tx_nwrq > 0); | |
804 | LASSERT (tx->tx_nwrq <= 1 + IBLND_RDMA_FRAGS(ver)); | |
805 | ||
806 | LASSERT (credit == 0 || credit == 1); | |
807 | LASSERT (conn->ibc_outstanding_credits >= 0); | |
808 | LASSERT (conn->ibc_outstanding_credits <= IBLND_MSG_QUEUE_SIZE(ver)); | |
809 | LASSERT (conn->ibc_credits >= 0); | |
810 | LASSERT (conn->ibc_credits <= IBLND_MSG_QUEUE_SIZE(ver)); | |
811 | ||
812 | if (conn->ibc_nsends_posted == IBLND_CONCURRENT_SENDS(ver)) { | |
813 | /* tx completions outstanding... */ | |
814 | CDEBUG(D_NET, "%s: posted enough\n", | |
815 | libcfs_nid2str(peer->ibp_nid)); | |
816 | return -EAGAIN; | |
817 | } | |
818 | ||
819 | if (credit != 0 && conn->ibc_credits == 0) { /* no credits */ | |
820 | CDEBUG(D_NET, "%s: no credits\n", | |
821 | libcfs_nid2str(peer->ibp_nid)); | |
822 | return -EAGAIN; | |
823 | } | |
824 | ||
825 | if (credit != 0 && !IBLND_OOB_CAPABLE(ver) && | |
826 | conn->ibc_credits == 1 && /* last credit reserved */ | |
827 | msg->ibm_type != IBLND_MSG_NOOP) { /* for NOOP */ | |
828 | CDEBUG(D_NET, "%s: not using last credit\n", | |
829 | libcfs_nid2str(peer->ibp_nid)); | |
830 | return -EAGAIN; | |
831 | } | |
832 | ||
833 | /* NB don't drop ibc_lock before bumping tx_sending */ | |
834 | list_del(&tx->tx_list); | |
835 | tx->tx_queued = 0; | |
836 | ||
837 | if (msg->ibm_type == IBLND_MSG_NOOP && | |
838 | (!kiblnd_need_noop(conn) || /* redundant NOOP */ | |
839 | (IBLND_OOB_CAPABLE(ver) && /* posted enough NOOP */ | |
840 | conn->ibc_noops_posted == IBLND_OOB_MSGS(ver)))) { | |
841 | /* OK to drop when posted enough NOOPs, since | |
842 | * kiblnd_check_sends will queue NOOP again when | |
843 | * posted NOOPs complete */ | |
844 | spin_unlock(&conn->ibc_lock); | |
845 | kiblnd_tx_done(peer->ibp_ni, tx); | |
846 | spin_lock(&conn->ibc_lock); | |
847 | CDEBUG(D_NET, "%s(%d): redundant or enough NOOP\n", | |
848 | libcfs_nid2str(peer->ibp_nid), | |
849 | conn->ibc_noops_posted); | |
850 | return 0; | |
851 | } | |
852 | ||
853 | kiblnd_pack_msg(peer->ibp_ni, msg, ver, conn->ibc_outstanding_credits, | |
854 | peer->ibp_nid, conn->ibc_incarnation); | |
855 | ||
856 | conn->ibc_credits -= credit; | |
857 | conn->ibc_outstanding_credits = 0; | |
858 | conn->ibc_nsends_posted++; | |
859 | if (msg->ibm_type == IBLND_MSG_NOOP) | |
860 | conn->ibc_noops_posted++; | |
861 | ||
862 | /* CAVEAT EMPTOR! This tx could be the PUT_DONE of an RDMA | |
863 | * PUT. If so, it was first queued here as a PUT_REQ, sent and | |
864 | * stashed on ibc_active_txs, matched by an incoming PUT_ACK, | |
865 | * and then re-queued here. It's (just) possible that | |
866 | * tx_sending is non-zero if we've not done the tx_complete() | |
867 | * from the first send; hence the ++ rather than = below. */ | |
868 | tx->tx_sending++; | |
869 | list_add(&tx->tx_list, &conn->ibc_active_txs); | |
870 | ||
871 | /* I'm still holding ibc_lock! */ | |
872 | if (conn->ibc_state != IBLND_CONN_ESTABLISHED) { | |
873 | rc = -ECONNABORTED; | |
874 | } else if (tx->tx_pool->tpo_pool.po_failed || | |
875 | conn->ibc_hdev != tx->tx_pool->tpo_hdev) { | |
876 | /* close_conn will launch failover */ | |
877 | rc = -ENETDOWN; | |
878 | } else { | |
879 | rc = ib_post_send(conn->ibc_cmid->qp, | |
880 | tx->tx_wrq, &bad_wrq); | |
881 | } | |
882 | ||
883 | conn->ibc_last_send = jiffies; | |
884 | ||
885 | if (rc == 0) | |
886 | return 0; | |
887 | ||
888 | /* NB credits are transferred in the actual | |
889 | * message, which can only be the last work item */ | |
890 | conn->ibc_credits += credit; | |
891 | conn->ibc_outstanding_credits += msg->ibm_credits; | |
892 | conn->ibc_nsends_posted--; | |
893 | if (msg->ibm_type == IBLND_MSG_NOOP) | |
894 | conn->ibc_noops_posted--; | |
895 | ||
896 | tx->tx_status = rc; | |
897 | tx->tx_waiting = 0; | |
898 | tx->tx_sending--; | |
899 | ||
900 | done = (tx->tx_sending == 0); | |
901 | if (done) | |
902 | list_del(&tx->tx_list); | |
903 | ||
904 | spin_unlock(&conn->ibc_lock); | |
905 | ||
906 | if (conn->ibc_state == IBLND_CONN_ESTABLISHED) | |
907 | CERROR("Error %d posting transmit to %s\n", | |
908 | rc, libcfs_nid2str(peer->ibp_nid)); | |
909 | else | |
910 | CDEBUG(D_NET, "Error %d posting transmit to %s\n", | |
911 | rc, libcfs_nid2str(peer->ibp_nid)); | |
912 | ||
913 | kiblnd_close_conn(conn, rc); | |
914 | ||
915 | if (done) | |
916 | kiblnd_tx_done(peer->ibp_ni, tx); | |
917 | ||
918 | spin_lock(&conn->ibc_lock); | |
919 | ||
920 | return -EIO; | |
921 | } | |
922 | ||
923 | void | |
924 | kiblnd_check_sends (kib_conn_t *conn) | |
925 | { | |
926 | int ver = conn->ibc_version; | |
927 | lnet_ni_t *ni = conn->ibc_peer->ibp_ni; | |
928 | kib_tx_t *tx; | |
929 | ||
930 | /* Don't send anything until after the connection is established */ | |
931 | if (conn->ibc_state < IBLND_CONN_ESTABLISHED) { | |
932 | CDEBUG(D_NET, "%s too soon\n", | |
933 | libcfs_nid2str(conn->ibc_peer->ibp_nid)); | |
934 | return; | |
935 | } | |
936 | ||
937 | spin_lock(&conn->ibc_lock); | |
938 | ||
939 | LASSERT (conn->ibc_nsends_posted <= IBLND_CONCURRENT_SENDS(ver)); | |
940 | LASSERT (!IBLND_OOB_CAPABLE(ver) || | |
941 | conn->ibc_noops_posted <= IBLND_OOB_MSGS(ver)); | |
942 | LASSERT (conn->ibc_reserved_credits >= 0); | |
943 | ||
944 | while (conn->ibc_reserved_credits > 0 && | |
945 | !list_empty(&conn->ibc_tx_queue_rsrvd)) { | |
946 | tx = list_entry(conn->ibc_tx_queue_rsrvd.next, | |
947 | kib_tx_t, tx_list); | |
948 | list_del(&tx->tx_list); | |
949 | list_add_tail(&tx->tx_list, &conn->ibc_tx_queue); | |
950 | conn->ibc_reserved_credits--; | |
951 | } | |
952 | ||
953 | if (kiblnd_need_noop(conn)) { | |
954 | spin_unlock(&conn->ibc_lock); | |
955 | ||
956 | tx = kiblnd_get_idle_tx(ni, conn->ibc_peer->ibp_nid); | |
957 | if (tx != NULL) | |
958 | kiblnd_init_tx_msg(ni, tx, IBLND_MSG_NOOP, 0); | |
959 | ||
960 | spin_lock(&conn->ibc_lock); | |
961 | if (tx != NULL) | |
962 | kiblnd_queue_tx_locked(tx, conn); | |
963 | } | |
964 | ||
965 | kiblnd_conn_addref(conn); /* 1 ref for me.... (see b21911) */ | |
966 | ||
967 | for (;;) { | |
968 | int credit; | |
969 | ||
970 | if (!list_empty(&conn->ibc_tx_queue_nocred)) { | |
971 | credit = 0; | |
972 | tx = list_entry(conn->ibc_tx_queue_nocred.next, | |
973 | kib_tx_t, tx_list); | |
974 | } else if (!list_empty(&conn->ibc_tx_noops)) { | |
975 | LASSERT (!IBLND_OOB_CAPABLE(ver)); | |
976 | credit = 1; | |
977 | tx = list_entry(conn->ibc_tx_noops.next, | |
978 | kib_tx_t, tx_list); | |
979 | } else if (!list_empty(&conn->ibc_tx_queue)) { | |
980 | credit = 1; | |
981 | tx = list_entry(conn->ibc_tx_queue.next, | |
982 | kib_tx_t, tx_list); | |
983 | } else | |
984 | break; | |
985 | ||
986 | if (kiblnd_post_tx_locked(conn, tx, credit) != 0) | |
987 | break; | |
988 | } | |
989 | ||
990 | spin_unlock(&conn->ibc_lock); | |
991 | ||
992 | kiblnd_conn_decref(conn); /* ...until here */ | |
993 | } | |
994 | ||
995 | void | |
996 | kiblnd_tx_complete (kib_tx_t *tx, int status) | |
997 | { | |
998 | int failed = (status != IB_WC_SUCCESS); | |
999 | kib_conn_t *conn = tx->tx_conn; | |
1000 | int idle; | |
1001 | ||
1002 | LASSERT (tx->tx_sending > 0); | |
1003 | ||
1004 | if (failed) { | |
1005 | if (conn->ibc_state == IBLND_CONN_ESTABLISHED) | |
1006 | CNETERR("Tx -> %s cookie "LPX64 | |
1007 | " sending %d waiting %d: failed %d\n", | |
1008 | libcfs_nid2str(conn->ibc_peer->ibp_nid), | |
1009 | tx->tx_cookie, tx->tx_sending, tx->tx_waiting, | |
1010 | status); | |
1011 | ||
1012 | kiblnd_close_conn(conn, -EIO); | |
1013 | } else { | |
1014 | kiblnd_peer_alive(conn->ibc_peer); | |
1015 | } | |
1016 | ||
1017 | spin_lock(&conn->ibc_lock); | |
1018 | ||
1019 | /* I could be racing with rdma completion. Whoever makes 'tx' idle | |
1020 | * gets to free it, which also drops its ref on 'conn'. */ | |
1021 | ||
1022 | tx->tx_sending--; | |
1023 | conn->ibc_nsends_posted--; | |
1024 | if (tx->tx_msg->ibm_type == IBLND_MSG_NOOP) | |
1025 | conn->ibc_noops_posted--; | |
1026 | ||
1027 | if (failed) { | |
1028 | tx->tx_waiting = 0; /* don't wait for peer */ | |
1029 | tx->tx_status = -EIO; | |
1030 | } | |
1031 | ||
1032 | idle = (tx->tx_sending == 0) && /* This is the final callback */ | |
1033 | !tx->tx_waiting && /* Not waiting for peer */ | |
1034 | !tx->tx_queued; /* Not re-queued (PUT_DONE) */ | |
1035 | if (idle) | |
1036 | list_del(&tx->tx_list); | |
1037 | ||
1038 | kiblnd_conn_addref(conn); /* 1 ref for me.... */ | |
1039 | ||
1040 | spin_unlock(&conn->ibc_lock); | |
1041 | ||
1042 | if (idle) | |
1043 | kiblnd_tx_done(conn->ibc_peer->ibp_ni, tx); | |
1044 | ||
1045 | kiblnd_check_sends(conn); | |
1046 | ||
1047 | kiblnd_conn_decref(conn); /* ...until here */ | |
1048 | } | |
1049 | ||
1050 | void | |
1051 | kiblnd_init_tx_msg (lnet_ni_t *ni, kib_tx_t *tx, int type, int body_nob) | |
1052 | { | |
1053 | kib_hca_dev_t *hdev = tx->tx_pool->tpo_hdev; | |
1054 | struct ib_sge *sge = &tx->tx_sge[tx->tx_nwrq]; | |
1055 | struct ib_send_wr *wrq = &tx->tx_wrq[tx->tx_nwrq]; | |
1056 | int nob = offsetof (kib_msg_t, ibm_u) + body_nob; | |
1057 | struct ib_mr *mr; | |
1058 | ||
1059 | LASSERT (tx->tx_nwrq >= 0); | |
1060 | LASSERT (tx->tx_nwrq < IBLND_MAX_RDMA_FRAGS + 1); | |
1061 | LASSERT (nob <= IBLND_MSG_SIZE); | |
1062 | ||
1063 | kiblnd_init_msg(tx->tx_msg, type, body_nob); | |
1064 | ||
1065 | mr = kiblnd_find_dma_mr(hdev, tx->tx_msgaddr, nob); | |
1066 | LASSERT (mr != NULL); | |
1067 | ||
1068 | sge->lkey = mr->lkey; | |
1069 | sge->addr = tx->tx_msgaddr; | |
1070 | sge->length = nob; | |
1071 | ||
1072 | memset(wrq, 0, sizeof(*wrq)); | |
1073 | ||
1074 | wrq->next = NULL; | |
1075 | wrq->wr_id = kiblnd_ptr2wreqid(tx, IBLND_WID_TX); | |
1076 | wrq->sg_list = sge; | |
1077 | wrq->num_sge = 1; | |
1078 | wrq->opcode = IB_WR_SEND; | |
1079 | wrq->send_flags = IB_SEND_SIGNALED; | |
1080 | ||
1081 | tx->tx_nwrq++; | |
1082 | } | |
1083 | ||
1084 | int | |
1085 | kiblnd_init_rdma (kib_conn_t *conn, kib_tx_t *tx, int type, | |
1086 | int resid, kib_rdma_desc_t *dstrd, __u64 dstcookie) | |
1087 | { | |
1088 | kib_msg_t *ibmsg = tx->tx_msg; | |
1089 | kib_rdma_desc_t *srcrd = tx->tx_rd; | |
1090 | struct ib_sge *sge = &tx->tx_sge[0]; | |
1091 | struct ib_send_wr *wrq = &tx->tx_wrq[0]; | |
1092 | int rc = resid; | |
1093 | int srcidx; | |
1094 | int dstidx; | |
1095 | int wrknob; | |
1096 | ||
1097 | LASSERT (!in_interrupt()); | |
1098 | LASSERT (tx->tx_nwrq == 0); | |
1099 | LASSERT (type == IBLND_MSG_GET_DONE || | |
1100 | type == IBLND_MSG_PUT_DONE); | |
1101 | ||
1102 | srcidx = dstidx = 0; | |
1103 | ||
1104 | while (resid > 0) { | |
1105 | if (srcidx >= srcrd->rd_nfrags) { | |
1106 | CERROR("Src buffer exhausted: %d frags\n", srcidx); | |
1107 | rc = -EPROTO; | |
1108 | break; | |
1109 | } | |
1110 | ||
1111 | if (dstidx == dstrd->rd_nfrags) { | |
1112 | CERROR("Dst buffer exhausted: %d frags\n", dstidx); | |
1113 | rc = -EPROTO; | |
1114 | break; | |
1115 | } | |
1116 | ||
1117 | if (tx->tx_nwrq == IBLND_RDMA_FRAGS(conn->ibc_version)) { | |
1118 | CERROR("RDMA too fragmented for %s (%d): " | |
1119 | "%d/%d src %d/%d dst frags\n", | |
1120 | libcfs_nid2str(conn->ibc_peer->ibp_nid), | |
1121 | IBLND_RDMA_FRAGS(conn->ibc_version), | |
1122 | srcidx, srcrd->rd_nfrags, | |
1123 | dstidx, dstrd->rd_nfrags); | |
1124 | rc = -EMSGSIZE; | |
1125 | break; | |
1126 | } | |
1127 | ||
1128 | wrknob = MIN(MIN(kiblnd_rd_frag_size(srcrd, srcidx), | |
1129 | kiblnd_rd_frag_size(dstrd, dstidx)), resid); | |
1130 | ||
1131 | sge = &tx->tx_sge[tx->tx_nwrq]; | |
1132 | sge->addr = kiblnd_rd_frag_addr(srcrd, srcidx); | |
1133 | sge->lkey = kiblnd_rd_frag_key(srcrd, srcidx); | |
1134 | sge->length = wrknob; | |
1135 | ||
1136 | wrq = &tx->tx_wrq[tx->tx_nwrq]; | |
1137 | ||
1138 | wrq->next = wrq + 1; | |
1139 | wrq->wr_id = kiblnd_ptr2wreqid(tx, IBLND_WID_RDMA); | |
1140 | wrq->sg_list = sge; | |
1141 | wrq->num_sge = 1; | |
1142 | wrq->opcode = IB_WR_RDMA_WRITE; | |
1143 | wrq->send_flags = 0; | |
1144 | ||
1145 | wrq->wr.rdma.remote_addr = kiblnd_rd_frag_addr(dstrd, dstidx); | |
1146 | wrq->wr.rdma.rkey = kiblnd_rd_frag_key(dstrd, dstidx); | |
1147 | ||
1148 | srcidx = kiblnd_rd_consume_frag(srcrd, srcidx, wrknob); | |
1149 | dstidx = kiblnd_rd_consume_frag(dstrd, dstidx, wrknob); | |
1150 | ||
1151 | resid -= wrknob; | |
1152 | ||
1153 | tx->tx_nwrq++; | |
1154 | wrq++; | |
1155 | sge++; | |
1156 | } | |
1157 | ||
1158 | if (rc < 0) /* no RDMA if completing with failure */ | |
1159 | tx->tx_nwrq = 0; | |
1160 | ||
1161 | ibmsg->ibm_u.completion.ibcm_status = rc; | |
1162 | ibmsg->ibm_u.completion.ibcm_cookie = dstcookie; | |
1163 | kiblnd_init_tx_msg(conn->ibc_peer->ibp_ni, tx, | |
1164 | type, sizeof (kib_completion_msg_t)); | |
1165 | ||
1166 | return rc; | |
1167 | } | |
1168 | ||
1169 | void | |
1170 | kiblnd_queue_tx_locked (kib_tx_t *tx, kib_conn_t *conn) | |
1171 | { | |
1172 | struct list_head *q; | |
1173 | ||
1174 | LASSERT (tx->tx_nwrq > 0); /* work items set up */ | |
1175 | LASSERT (!tx->tx_queued); /* not queued for sending already */ | |
1176 | LASSERT (conn->ibc_state >= IBLND_CONN_ESTABLISHED); | |
1177 | ||
1178 | tx->tx_queued = 1; | |
1179 | tx->tx_deadline = jiffies + (*kiblnd_tunables.kib_timeout * HZ); | |
1180 | ||
1181 | if (tx->tx_conn == NULL) { | |
1182 | kiblnd_conn_addref(conn); | |
1183 | tx->tx_conn = conn; | |
1184 | LASSERT (tx->tx_msg->ibm_type != IBLND_MSG_PUT_DONE); | |
1185 | } else { | |
1186 | /* PUT_DONE first attached to conn as a PUT_REQ */ | |
1187 | LASSERT (tx->tx_conn == conn); | |
1188 | LASSERT (tx->tx_msg->ibm_type == IBLND_MSG_PUT_DONE); | |
1189 | } | |
1190 | ||
1191 | switch (tx->tx_msg->ibm_type) { | |
1192 | default: | |
1193 | LBUG(); | |
1194 | ||
1195 | case IBLND_MSG_PUT_REQ: | |
1196 | case IBLND_MSG_GET_REQ: | |
1197 | q = &conn->ibc_tx_queue_rsrvd; | |
1198 | break; | |
1199 | ||
1200 | case IBLND_MSG_PUT_NAK: | |
1201 | case IBLND_MSG_PUT_ACK: | |
1202 | case IBLND_MSG_PUT_DONE: | |
1203 | case IBLND_MSG_GET_DONE: | |
1204 | q = &conn->ibc_tx_queue_nocred; | |
1205 | break; | |
1206 | ||
1207 | case IBLND_MSG_NOOP: | |
1208 | if (IBLND_OOB_CAPABLE(conn->ibc_version)) | |
1209 | q = &conn->ibc_tx_queue_nocred; | |
1210 | else | |
1211 | q = &conn->ibc_tx_noops; | |
1212 | break; | |
1213 | ||
1214 | case IBLND_MSG_IMMEDIATE: | |
1215 | q = &conn->ibc_tx_queue; | |
1216 | break; | |
1217 | } | |
1218 | ||
1219 | list_add_tail(&tx->tx_list, q); | |
1220 | } | |
1221 | ||
1222 | void | |
1223 | kiblnd_queue_tx (kib_tx_t *tx, kib_conn_t *conn) | |
1224 | { | |
1225 | spin_lock(&conn->ibc_lock); | |
1226 | kiblnd_queue_tx_locked(tx, conn); | |
1227 | spin_unlock(&conn->ibc_lock); | |
1228 | ||
1229 | kiblnd_check_sends(conn); | |
1230 | } | |
1231 | ||
1232 | static int kiblnd_resolve_addr(struct rdma_cm_id *cmid, | |
1233 | struct sockaddr_in *srcaddr, | |
1234 | struct sockaddr_in *dstaddr, | |
1235 | int timeout_ms) | |
1236 | { | |
1237 | unsigned short port; | |
1238 | int rc; | |
1239 | ||
1240 | /* allow the port to be reused */ | |
1241 | rc = rdma_set_reuseaddr(cmid, 1); | |
1242 | if (rc != 0) { | |
1243 | CERROR("Unable to set reuse on cmid: %d\n", rc); | |
1244 | return rc; | |
1245 | } | |
1246 | ||
1247 | /* look for a free privileged port */ | |
1248 | for (port = PROT_SOCK-1; port > 0; port--) { | |
1249 | srcaddr->sin_port = htons(port); | |
1250 | rc = rdma_resolve_addr(cmid, | |
1251 | (struct sockaddr *)srcaddr, | |
1252 | (struct sockaddr *)dstaddr, | |
1253 | timeout_ms); | |
1254 | if (rc == 0) { | |
1255 | CDEBUG(D_NET, "bound to port %hu\n", port); | |
1256 | return 0; | |
1257 | } else if (rc == -EADDRINUSE || rc == -EADDRNOTAVAIL) { | |
1258 | CDEBUG(D_NET, "bind to port %hu failed: %d\n", | |
1259 | port, rc); | |
1260 | } else { | |
1261 | return rc; | |
1262 | } | |
1263 | } | |
1264 | ||
1265 | CERROR("Failed to bind to a free privileged port\n"); | |
1266 | return rc; | |
1267 | } | |
1268 | ||
1269 | void | |
1270 | kiblnd_connect_peer (kib_peer_t *peer) | |
1271 | { | |
1272 | struct rdma_cm_id *cmid; | |
1273 | kib_dev_t *dev; | |
1274 | kib_net_t *net = peer->ibp_ni->ni_data; | |
1275 | struct sockaddr_in srcaddr; | |
1276 | struct sockaddr_in dstaddr; | |
1277 | int rc; | |
1278 | ||
1279 | LASSERT (net != NULL); | |
1280 | LASSERT (peer->ibp_connecting > 0); | |
1281 | ||
1282 | cmid = kiblnd_rdma_create_id(kiblnd_cm_callback, peer, RDMA_PS_TCP, | |
1283 | IB_QPT_RC); | |
1284 | ||
1285 | if (IS_ERR(cmid)) { | |
1286 | CERROR("Can't create CMID for %s: %ld\n", | |
1287 | libcfs_nid2str(peer->ibp_nid), PTR_ERR(cmid)); | |
1288 | rc = PTR_ERR(cmid); | |
1289 | goto failed; | |
1290 | } | |
1291 | ||
1292 | dev = net->ibn_dev; | |
1293 | memset(&srcaddr, 0, sizeof(srcaddr)); | |
1294 | srcaddr.sin_family = AF_INET; | |
1295 | srcaddr.sin_addr.s_addr = htonl(dev->ibd_ifip); | |
1296 | ||
1297 | memset(&dstaddr, 0, sizeof(dstaddr)); | |
1298 | dstaddr.sin_family = AF_INET; | |
1299 | dstaddr.sin_port = htons(*kiblnd_tunables.kib_service); | |
1300 | dstaddr.sin_addr.s_addr = htonl(LNET_NIDADDR(peer->ibp_nid)); | |
1301 | ||
1302 | kiblnd_peer_addref(peer); /* cmid's ref */ | |
1303 | ||
1304 | if (*kiblnd_tunables.kib_use_priv_port) { | |
1305 | rc = kiblnd_resolve_addr(cmid, &srcaddr, &dstaddr, | |
1306 | *kiblnd_tunables.kib_timeout * 1000); | |
1307 | } else { | |
1308 | rc = rdma_resolve_addr(cmid, | |
1309 | (struct sockaddr *)&srcaddr, | |
1310 | (struct sockaddr *)&dstaddr, | |
1311 | *kiblnd_tunables.kib_timeout * 1000); | |
1312 | } | |
1313 | if (rc != 0) { | |
1314 | /* Can't initiate address resolution: */ | |
1315 | CERROR("Can't resolve addr for %s: %d\n", | |
1316 | libcfs_nid2str(peer->ibp_nid), rc); | |
1317 | goto failed2; | |
1318 | } | |
1319 | ||
1320 | LASSERT (cmid->device != NULL); | |
5e8f6920 | 1321 | CDEBUG(D_NET, "%s: connection bound to %s:%pI4h:%s\n", |
d7e09d03 | 1322 | libcfs_nid2str(peer->ibp_nid), dev->ibd_ifname, |
5e8f6920 | 1323 | &dev->ibd_ifip, cmid->device->name); |
d7e09d03 PT |
1324 | |
1325 | return; | |
1326 | ||
1327 | failed2: | |
1328 | kiblnd_peer_decref(peer); /* cmid's ref */ | |
1329 | rdma_destroy_id(cmid); | |
1330 | failed: | |
1331 | kiblnd_peer_connect_failed(peer, 1, rc); | |
1332 | } | |
1333 | ||
1334 | void | |
1335 | kiblnd_launch_tx (lnet_ni_t *ni, kib_tx_t *tx, lnet_nid_t nid) | |
1336 | { | |
1337 | kib_peer_t *peer; | |
1338 | kib_peer_t *peer2; | |
1339 | kib_conn_t *conn; | |
1340 | rwlock_t *g_lock = &kiblnd_data.kib_global_lock; | |
1341 | unsigned long flags; | |
1342 | int rc; | |
1343 | ||
1344 | /* If I get here, I've committed to send, so I complete the tx with | |
1345 | * failure on any problems */ | |
1346 | ||
1347 | LASSERT (tx == NULL || tx->tx_conn == NULL); /* only set when assigned a conn */ | |
1348 | LASSERT (tx == NULL || tx->tx_nwrq > 0); /* work items have been set up */ | |
1349 | ||
1350 | /* First time, just use a read lock since I expect to find my peer | |
1351 | * connected */ | |
1352 | read_lock_irqsave(g_lock, flags); | |
1353 | ||
1354 | peer = kiblnd_find_peer_locked(nid); | |
1355 | if (peer != NULL && !list_empty(&peer->ibp_conns)) { | |
1356 | /* Found a peer with an established connection */ | |
1357 | conn = kiblnd_get_conn_locked(peer); | |
1358 | kiblnd_conn_addref(conn); /* 1 ref for me... */ | |
1359 | ||
1360 | read_unlock_irqrestore(g_lock, flags); | |
1361 | ||
1362 | if (tx != NULL) | |
1363 | kiblnd_queue_tx(tx, conn); | |
1364 | kiblnd_conn_decref(conn); /* ...to here */ | |
1365 | return; | |
1366 | } | |
1367 | ||
1368 | read_unlock(g_lock); | |
1369 | /* Re-try with a write lock */ | |
1370 | write_lock(g_lock); | |
1371 | ||
1372 | peer = kiblnd_find_peer_locked(nid); | |
1373 | if (peer != NULL) { | |
1374 | if (list_empty(&peer->ibp_conns)) { | |
1375 | /* found a peer, but it's still connecting... */ | |
1376 | LASSERT (peer->ibp_connecting != 0 || | |
1377 | peer->ibp_accepting != 0); | |
1378 | if (tx != NULL) | |
1379 | list_add_tail(&tx->tx_list, | |
1380 | &peer->ibp_tx_queue); | |
1381 | write_unlock_irqrestore(g_lock, flags); | |
1382 | } else { | |
1383 | conn = kiblnd_get_conn_locked(peer); | |
1384 | kiblnd_conn_addref(conn); /* 1 ref for me... */ | |
1385 | ||
1386 | write_unlock_irqrestore(g_lock, flags); | |
1387 | ||
1388 | if (tx != NULL) | |
1389 | kiblnd_queue_tx(tx, conn); | |
1390 | kiblnd_conn_decref(conn); /* ...to here */ | |
1391 | } | |
1392 | return; | |
1393 | } | |
1394 | ||
1395 | write_unlock_irqrestore(g_lock, flags); | |
1396 | ||
1397 | /* Allocate a peer ready to add to the peer table and retry */ | |
1398 | rc = kiblnd_create_peer(ni, &peer, nid); | |
1399 | if (rc != 0) { | |
1400 | CERROR("Can't create peer %s\n", libcfs_nid2str(nid)); | |
1401 | if (tx != NULL) { | |
1402 | tx->tx_status = -EHOSTUNREACH; | |
1403 | tx->tx_waiting = 0; | |
1404 | kiblnd_tx_done(ni, tx); | |
1405 | } | |
1406 | return; | |
1407 | } | |
1408 | ||
1409 | write_lock_irqsave(g_lock, flags); | |
1410 | ||
1411 | peer2 = kiblnd_find_peer_locked(nid); | |
1412 | if (peer2 != NULL) { | |
1413 | if (list_empty(&peer2->ibp_conns)) { | |
1414 | /* found a peer, but it's still connecting... */ | |
1415 | LASSERT (peer2->ibp_connecting != 0 || | |
1416 | peer2->ibp_accepting != 0); | |
1417 | if (tx != NULL) | |
1418 | list_add_tail(&tx->tx_list, | |
1419 | &peer2->ibp_tx_queue); | |
1420 | write_unlock_irqrestore(g_lock, flags); | |
1421 | } else { | |
1422 | conn = kiblnd_get_conn_locked(peer2); | |
1423 | kiblnd_conn_addref(conn); /* 1 ref for me... */ | |
1424 | ||
1425 | write_unlock_irqrestore(g_lock, flags); | |
1426 | ||
1427 | if (tx != NULL) | |
1428 | kiblnd_queue_tx(tx, conn); | |
1429 | kiblnd_conn_decref(conn); /* ...to here */ | |
1430 | } | |
1431 | ||
1432 | kiblnd_peer_decref(peer); | |
1433 | return; | |
1434 | } | |
1435 | ||
1436 | /* Brand new peer */ | |
1437 | LASSERT (peer->ibp_connecting == 0); | |
1438 | peer->ibp_connecting = 1; | |
1439 | ||
1440 | /* always called with a ref on ni, which prevents ni being shutdown */ | |
1441 | LASSERT (((kib_net_t *)ni->ni_data)->ibn_shutdown == 0); | |
1442 | ||
1443 | if (tx != NULL) | |
1444 | list_add_tail(&tx->tx_list, &peer->ibp_tx_queue); | |
1445 | ||
1446 | kiblnd_peer_addref(peer); | |
1447 | list_add_tail(&peer->ibp_list, kiblnd_nid2peerlist(nid)); | |
1448 | ||
1449 | write_unlock_irqrestore(g_lock, flags); | |
1450 | ||
1451 | kiblnd_connect_peer(peer); | |
1452 | kiblnd_peer_decref(peer); | |
1453 | } | |
1454 | ||
1455 | int | |
1456 | kiblnd_send (lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg) | |
1457 | { | |
1458 | lnet_hdr_t *hdr = &lntmsg->msg_hdr; | |
1459 | int type = lntmsg->msg_type; | |
1460 | lnet_process_id_t target = lntmsg->msg_target; | |
1461 | int target_is_router = lntmsg->msg_target_is_router; | |
1462 | int routing = lntmsg->msg_routing; | |
1463 | unsigned int payload_niov = lntmsg->msg_niov; | |
1464 | struct iovec *payload_iov = lntmsg->msg_iov; | |
1465 | lnet_kiov_t *payload_kiov = lntmsg->msg_kiov; | |
1466 | unsigned int payload_offset = lntmsg->msg_offset; | |
1467 | unsigned int payload_nob = lntmsg->msg_len; | |
1468 | kib_msg_t *ibmsg; | |
1469 | kib_tx_t *tx; | |
1470 | int nob; | |
1471 | int rc; | |
1472 | ||
1473 | /* NB 'private' is different depending on what we're sending.... */ | |
1474 | ||
1475 | CDEBUG(D_NET, "sending %d bytes in %d frags to %s\n", | |
1476 | payload_nob, payload_niov, libcfs_id2str(target)); | |
1477 | ||
1478 | LASSERT (payload_nob == 0 || payload_niov > 0); | |
1479 | LASSERT (payload_niov <= LNET_MAX_IOV); | |
1480 | ||
1481 | /* Thread context */ | |
1482 | LASSERT (!in_interrupt()); | |
1483 | /* payload is either all vaddrs or all pages */ | |
1484 | LASSERT (!(payload_kiov != NULL && payload_iov != NULL)); | |
1485 | ||
1486 | switch (type) { | |
1487 | default: | |
1488 | LBUG(); | |
1489 | return (-EIO); | |
1490 | ||
1491 | case LNET_MSG_ACK: | |
1492 | LASSERT (payload_nob == 0); | |
1493 | break; | |
1494 | ||
1495 | case LNET_MSG_GET: | |
1496 | if (routing || target_is_router) | |
1497 | break; /* send IMMEDIATE */ | |
1498 | ||
1499 | /* is the REPLY message too small for RDMA? */ | |
1500 | nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[lntmsg->msg_md->md_length]); | |
1501 | if (nob <= IBLND_MSG_SIZE) | |
1502 | break; /* send IMMEDIATE */ | |
1503 | ||
1504 | tx = kiblnd_get_idle_tx(ni, target.nid); | |
1505 | if (tx == NULL) { | |
1506 | CERROR("Can't allocate txd for GET to %s\n", | |
1507 | libcfs_nid2str(target.nid)); | |
1508 | return -ENOMEM; | |
1509 | } | |
1510 | ||
1511 | ibmsg = tx->tx_msg; | |
1512 | ||
1513 | if ((lntmsg->msg_md->md_options & LNET_MD_KIOV) == 0) | |
1514 | rc = kiblnd_setup_rd_iov(ni, tx, | |
1515 | &ibmsg->ibm_u.get.ibgm_rd, | |
1516 | lntmsg->msg_md->md_niov, | |
1517 | lntmsg->msg_md->md_iov.iov, | |
1518 | 0, lntmsg->msg_md->md_length); | |
1519 | else | |
1520 | rc = kiblnd_setup_rd_kiov(ni, tx, | |
1521 | &ibmsg->ibm_u.get.ibgm_rd, | |
1522 | lntmsg->msg_md->md_niov, | |
1523 | lntmsg->msg_md->md_iov.kiov, | |
1524 | 0, lntmsg->msg_md->md_length); | |
1525 | if (rc != 0) { | |
1526 | CERROR("Can't setup GET sink for %s: %d\n", | |
1527 | libcfs_nid2str(target.nid), rc); | |
1528 | kiblnd_tx_done(ni, tx); | |
1529 | return -EIO; | |
1530 | } | |
1531 | ||
1532 | nob = offsetof(kib_get_msg_t, ibgm_rd.rd_frags[tx->tx_nfrags]); | |
1533 | ibmsg->ibm_u.get.ibgm_cookie = tx->tx_cookie; | |
1534 | ibmsg->ibm_u.get.ibgm_hdr = *hdr; | |
1535 | ||
1536 | kiblnd_init_tx_msg(ni, tx, IBLND_MSG_GET_REQ, nob); | |
1537 | ||
1538 | tx->tx_lntmsg[1] = lnet_create_reply_msg(ni, lntmsg); | |
1539 | if (tx->tx_lntmsg[1] == NULL) { | |
1540 | CERROR("Can't create reply for GET -> %s\n", | |
1541 | libcfs_nid2str(target.nid)); | |
1542 | kiblnd_tx_done(ni, tx); | |
1543 | return -EIO; | |
1544 | } | |
1545 | ||
1546 | tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg[0,1] on completion */ | |
1547 | tx->tx_waiting = 1; /* waiting for GET_DONE */ | |
1548 | kiblnd_launch_tx(ni, tx, target.nid); | |
1549 | return 0; | |
1550 | ||
1551 | case LNET_MSG_REPLY: | |
1552 | case LNET_MSG_PUT: | |
1553 | /* Is the payload small enough not to need RDMA? */ | |
1554 | nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[payload_nob]); | |
1555 | if (nob <= IBLND_MSG_SIZE) | |
1556 | break; /* send IMMEDIATE */ | |
1557 | ||
1558 | tx = kiblnd_get_idle_tx(ni, target.nid); | |
1559 | if (tx == NULL) { | |
1560 | CERROR("Can't allocate %s txd for %s\n", | |
1561 | type == LNET_MSG_PUT ? "PUT" : "REPLY", | |
1562 | libcfs_nid2str(target.nid)); | |
1563 | return -ENOMEM; | |
1564 | } | |
1565 | ||
1566 | if (payload_kiov == NULL) | |
1567 | rc = kiblnd_setup_rd_iov(ni, tx, tx->tx_rd, | |
1568 | payload_niov, payload_iov, | |
1569 | payload_offset, payload_nob); | |
1570 | else | |
1571 | rc = kiblnd_setup_rd_kiov(ni, tx, tx->tx_rd, | |
1572 | payload_niov, payload_kiov, | |
1573 | payload_offset, payload_nob); | |
1574 | if (rc != 0) { | |
1575 | CERROR("Can't setup PUT src for %s: %d\n", | |
1576 | libcfs_nid2str(target.nid), rc); | |
1577 | kiblnd_tx_done(ni, tx); | |
1578 | return -EIO; | |
1579 | } | |
1580 | ||
1581 | ibmsg = tx->tx_msg; | |
1582 | ibmsg->ibm_u.putreq.ibprm_hdr = *hdr; | |
1583 | ibmsg->ibm_u.putreq.ibprm_cookie = tx->tx_cookie; | |
1584 | kiblnd_init_tx_msg(ni, tx, IBLND_MSG_PUT_REQ, sizeof(kib_putreq_msg_t)); | |
1585 | ||
1586 | tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */ | |
1587 | tx->tx_waiting = 1; /* waiting for PUT_{ACK,NAK} */ | |
1588 | kiblnd_launch_tx(ni, tx, target.nid); | |
1589 | return 0; | |
1590 | } | |
1591 | ||
1592 | /* send IMMEDIATE */ | |
1593 | ||
1594 | LASSERT (offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[payload_nob]) | |
1595 | <= IBLND_MSG_SIZE); | |
1596 | ||
1597 | tx = kiblnd_get_idle_tx(ni, target.nid); | |
1598 | if (tx == NULL) { | |
1599 | CERROR ("Can't send %d to %s: tx descs exhausted\n", | |
1600 | type, libcfs_nid2str(target.nid)); | |
1601 | return -ENOMEM; | |
1602 | } | |
1603 | ||
1604 | ibmsg = tx->tx_msg; | |
1605 | ibmsg->ibm_u.immediate.ibim_hdr = *hdr; | |
1606 | ||
1607 | if (payload_kiov != NULL) | |
1608 | lnet_copy_kiov2flat(IBLND_MSG_SIZE, ibmsg, | |
1609 | offsetof(kib_msg_t, ibm_u.immediate.ibim_payload), | |
1610 | payload_niov, payload_kiov, | |
1611 | payload_offset, payload_nob); | |
1612 | else | |
1613 | lnet_copy_iov2flat(IBLND_MSG_SIZE, ibmsg, | |
1614 | offsetof(kib_msg_t, ibm_u.immediate.ibim_payload), | |
1615 | payload_niov, payload_iov, | |
1616 | payload_offset, payload_nob); | |
1617 | ||
1618 | nob = offsetof(kib_immediate_msg_t, ibim_payload[payload_nob]); | |
1619 | kiblnd_init_tx_msg(ni, tx, IBLND_MSG_IMMEDIATE, nob); | |
1620 | ||
1621 | tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */ | |
1622 | kiblnd_launch_tx(ni, tx, target.nid); | |
1623 | return 0; | |
1624 | } | |
1625 | ||
1626 | void | |
1627 | kiblnd_reply (lnet_ni_t *ni, kib_rx_t *rx, lnet_msg_t *lntmsg) | |
1628 | { | |
1629 | lnet_process_id_t target = lntmsg->msg_target; | |
1630 | unsigned int niov = lntmsg->msg_niov; | |
1631 | struct iovec *iov = lntmsg->msg_iov; | |
1632 | lnet_kiov_t *kiov = lntmsg->msg_kiov; | |
1633 | unsigned int offset = lntmsg->msg_offset; | |
1634 | unsigned int nob = lntmsg->msg_len; | |
1635 | kib_tx_t *tx; | |
1636 | int rc; | |
1637 | ||
1638 | tx = kiblnd_get_idle_tx(ni, rx->rx_conn->ibc_peer->ibp_nid); | |
1639 | if (tx == NULL) { | |
1640 | CERROR("Can't get tx for REPLY to %s\n", | |
1641 | libcfs_nid2str(target.nid)); | |
1642 | goto failed_0; | |
1643 | } | |
1644 | ||
1645 | if (nob == 0) | |
1646 | rc = 0; | |
1647 | else if (kiov == NULL) | |
1648 | rc = kiblnd_setup_rd_iov(ni, tx, tx->tx_rd, | |
1649 | niov, iov, offset, nob); | |
1650 | else | |
1651 | rc = kiblnd_setup_rd_kiov(ni, tx, tx->tx_rd, | |
1652 | niov, kiov, offset, nob); | |
1653 | ||
1654 | if (rc != 0) { | |
1655 | CERROR("Can't setup GET src for %s: %d\n", | |
1656 | libcfs_nid2str(target.nid), rc); | |
1657 | goto failed_1; | |
1658 | } | |
1659 | ||
1660 | rc = kiblnd_init_rdma(rx->rx_conn, tx, | |
1661 | IBLND_MSG_GET_DONE, nob, | |
1662 | &rx->rx_msg->ibm_u.get.ibgm_rd, | |
1663 | rx->rx_msg->ibm_u.get.ibgm_cookie); | |
1664 | if (rc < 0) { | |
1665 | CERROR("Can't setup rdma for GET from %s: %d\n", | |
1666 | libcfs_nid2str(target.nid), rc); | |
1667 | goto failed_1; | |
1668 | } | |
1669 | ||
1670 | if (nob == 0) { | |
1671 | /* No RDMA: local completion may happen now! */ | |
1672 | lnet_finalize(ni, lntmsg, 0); | |
1673 | } else { | |
1674 | /* RDMA: lnet_finalize(lntmsg) when it | |
1675 | * completes */ | |
1676 | tx->tx_lntmsg[0] = lntmsg; | |
1677 | } | |
1678 | ||
1679 | kiblnd_queue_tx(tx, rx->rx_conn); | |
1680 | return; | |
1681 | ||
1682 | failed_1: | |
1683 | kiblnd_tx_done(ni, tx); | |
1684 | failed_0: | |
1685 | lnet_finalize(ni, lntmsg, -EIO); | |
1686 | } | |
1687 | ||
1688 | int | |
1689 | kiblnd_recv (lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg, int delayed, | |
1690 | unsigned int niov, struct iovec *iov, lnet_kiov_t *kiov, | |
1691 | unsigned int offset, unsigned int mlen, unsigned int rlen) | |
1692 | { | |
1693 | kib_rx_t *rx = private; | |
1694 | kib_msg_t *rxmsg = rx->rx_msg; | |
1695 | kib_conn_t *conn = rx->rx_conn; | |
1696 | kib_tx_t *tx; | |
1697 | kib_msg_t *txmsg; | |
1698 | int nob; | |
1699 | int post_credit = IBLND_POSTRX_PEER_CREDIT; | |
1700 | int rc = 0; | |
1701 | ||
1702 | LASSERT (mlen <= rlen); | |
1703 | LASSERT (!in_interrupt()); | |
1704 | /* Either all pages or all vaddrs */ | |
1705 | LASSERT (!(kiov != NULL && iov != NULL)); | |
1706 | ||
1707 | switch (rxmsg->ibm_type) { | |
1708 | default: | |
1709 | LBUG(); | |
1710 | ||
1711 | case IBLND_MSG_IMMEDIATE: | |
1712 | nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[rlen]); | |
1713 | if (nob > rx->rx_nob) { | |
1714 | CERROR ("Immediate message from %s too big: %d(%d)\n", | |
1715 | libcfs_nid2str(rxmsg->ibm_u.immediate.ibim_hdr.src_nid), | |
1716 | nob, rx->rx_nob); | |
1717 | rc = -EPROTO; | |
1718 | break; | |
1719 | } | |
1720 | ||
1721 | if (kiov != NULL) | |
1722 | lnet_copy_flat2kiov(niov, kiov, offset, | |
1723 | IBLND_MSG_SIZE, rxmsg, | |
1724 | offsetof(kib_msg_t, ibm_u.immediate.ibim_payload), | |
1725 | mlen); | |
1726 | else | |
1727 | lnet_copy_flat2iov(niov, iov, offset, | |
1728 | IBLND_MSG_SIZE, rxmsg, | |
1729 | offsetof(kib_msg_t, ibm_u.immediate.ibim_payload), | |
1730 | mlen); | |
1731 | lnet_finalize (ni, lntmsg, 0); | |
1732 | break; | |
1733 | ||
1734 | case IBLND_MSG_PUT_REQ: | |
1735 | if (mlen == 0) { | |
1736 | lnet_finalize(ni, lntmsg, 0); | |
1737 | kiblnd_send_completion(rx->rx_conn, IBLND_MSG_PUT_NAK, 0, | |
1738 | rxmsg->ibm_u.putreq.ibprm_cookie); | |
1739 | break; | |
1740 | } | |
1741 | ||
1742 | tx = kiblnd_get_idle_tx(ni, conn->ibc_peer->ibp_nid); | |
1743 | if (tx == NULL) { | |
1744 | CERROR("Can't allocate tx for %s\n", | |
1745 | libcfs_nid2str(conn->ibc_peer->ibp_nid)); | |
1746 | /* Not replying will break the connection */ | |
1747 | rc = -ENOMEM; | |
1748 | break; | |
1749 | } | |
1750 | ||
1751 | txmsg = tx->tx_msg; | |
1752 | if (kiov == NULL) | |
1753 | rc = kiblnd_setup_rd_iov(ni, tx, | |
1754 | &txmsg->ibm_u.putack.ibpam_rd, | |
1755 | niov, iov, offset, mlen); | |
1756 | else | |
1757 | rc = kiblnd_setup_rd_kiov(ni, tx, | |
1758 | &txmsg->ibm_u.putack.ibpam_rd, | |
1759 | niov, kiov, offset, mlen); | |
1760 | if (rc != 0) { | |
1761 | CERROR("Can't setup PUT sink for %s: %d\n", | |
1762 | libcfs_nid2str(conn->ibc_peer->ibp_nid), rc); | |
1763 | kiblnd_tx_done(ni, tx); | |
1764 | /* tell peer it's over */ | |
1765 | kiblnd_send_completion(rx->rx_conn, IBLND_MSG_PUT_NAK, rc, | |
1766 | rxmsg->ibm_u.putreq.ibprm_cookie); | |
1767 | break; | |
1768 | } | |
1769 | ||
1770 | nob = offsetof(kib_putack_msg_t, ibpam_rd.rd_frags[tx->tx_nfrags]); | |
1771 | txmsg->ibm_u.putack.ibpam_src_cookie = rxmsg->ibm_u.putreq.ibprm_cookie; | |
1772 | txmsg->ibm_u.putack.ibpam_dst_cookie = tx->tx_cookie; | |
1773 | ||
1774 | kiblnd_init_tx_msg(ni, tx, IBLND_MSG_PUT_ACK, nob); | |
1775 | ||
1776 | tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */ | |
1777 | tx->tx_waiting = 1; /* waiting for PUT_DONE */ | |
1778 | kiblnd_queue_tx(tx, conn); | |
1779 | ||
1780 | /* reposted buffer reserved for PUT_DONE */ | |
1781 | post_credit = IBLND_POSTRX_NO_CREDIT; | |
1782 | break; | |
1783 | ||
1784 | case IBLND_MSG_GET_REQ: | |
1785 | if (lntmsg != NULL) { | |
1786 | /* Optimized GET; RDMA lntmsg's payload */ | |
1787 | kiblnd_reply(ni, rx, lntmsg); | |
1788 | } else { | |
1789 | /* GET didn't match anything */ | |
1790 | kiblnd_send_completion(rx->rx_conn, IBLND_MSG_GET_DONE, | |
1791 | -ENODATA, | |
1792 | rxmsg->ibm_u.get.ibgm_cookie); | |
1793 | } | |
1794 | break; | |
1795 | } | |
1796 | ||
1797 | kiblnd_post_rx(rx, post_credit); | |
1798 | return rc; | |
1799 | } | |
1800 | ||
1801 | int | |
1802 | kiblnd_thread_start(int (*fn)(void *arg), void *arg, char *name) | |
1803 | { | |
9edf0f67 | 1804 | struct task_struct *task = kthread_run(fn, arg, "%s", name); |
d7e09d03 PT |
1805 | |
1806 | if (IS_ERR(task)) | |
1807 | return PTR_ERR(task); | |
1808 | ||
1809 | atomic_inc(&kiblnd_data.kib_nthreads); | |
1810 | return 0; | |
1811 | } | |
1812 | ||
1813 | void | |
1814 | kiblnd_thread_fini (void) | |
1815 | { | |
1816 | atomic_dec (&kiblnd_data.kib_nthreads); | |
1817 | } | |
1818 | ||
1819 | void | |
1820 | kiblnd_peer_alive (kib_peer_t *peer) | |
1821 | { | |
1822 | /* This is racy, but everyone's only writing cfs_time_current() */ | |
1823 | peer->ibp_last_alive = cfs_time_current(); | |
1824 | mb(); | |
1825 | } | |
1826 | ||
1827 | void | |
1828 | kiblnd_peer_notify (kib_peer_t *peer) | |
1829 | { | |
1830 | int error = 0; | |
1831 | cfs_time_t last_alive = 0; | |
1832 | unsigned long flags; | |
1833 | ||
1834 | read_lock_irqsave(&kiblnd_data.kib_global_lock, flags); | |
1835 | ||
1836 | if (list_empty(&peer->ibp_conns) && | |
1837 | peer->ibp_accepting == 0 && | |
1838 | peer->ibp_connecting == 0 && | |
1839 | peer->ibp_error != 0) { | |
1840 | error = peer->ibp_error; | |
1841 | peer->ibp_error = 0; | |
1842 | ||
1843 | last_alive = peer->ibp_last_alive; | |
1844 | } | |
1845 | ||
1846 | read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); | |
1847 | ||
1848 | if (error != 0) | |
1849 | lnet_notify(peer->ibp_ni, | |
1850 | peer->ibp_nid, 0, last_alive); | |
1851 | } | |
1852 | ||
1853 | void | |
1854 | kiblnd_close_conn_locked (kib_conn_t *conn, int error) | |
1855 | { | |
1856 | /* This just does the immediate housekeeping. 'error' is zero for a | |
1857 | * normal shutdown which can happen only after the connection has been | |
1858 | * established. If the connection is established, schedule the | |
1859 | * connection to be finished off by the connd. Otherwise the connd is | |
1860 | * already dealing with it (either to set it up or tear it down). | |
1861 | * Caller holds kib_global_lock exclusively in irq context */ | |
1862 | kib_peer_t *peer = conn->ibc_peer; | |
1863 | kib_dev_t *dev; | |
1864 | unsigned long flags; | |
1865 | ||
1866 | LASSERT (error != 0 || conn->ibc_state >= IBLND_CONN_ESTABLISHED); | |
1867 | ||
1868 | if (error != 0 && conn->ibc_comms_error == 0) | |
1869 | conn->ibc_comms_error = error; | |
1870 | ||
1871 | if (conn->ibc_state != IBLND_CONN_ESTABLISHED) | |
1872 | return; /* already being handled */ | |
1873 | ||
1874 | if (error == 0 && | |
1875 | list_empty(&conn->ibc_tx_noops) && | |
1876 | list_empty(&conn->ibc_tx_queue) && | |
1877 | list_empty(&conn->ibc_tx_queue_rsrvd) && | |
1878 | list_empty(&conn->ibc_tx_queue_nocred) && | |
1879 | list_empty(&conn->ibc_active_txs)) { | |
1880 | CDEBUG(D_NET, "closing conn to %s\n", | |
1881 | libcfs_nid2str(peer->ibp_nid)); | |
1882 | } else { | |
1883 | CNETERR("Closing conn to %s: error %d%s%s%s%s%s\n", | |
1884 | libcfs_nid2str(peer->ibp_nid), error, | |
1885 | list_empty(&conn->ibc_tx_queue) ? "" : "(sending)", | |
1886 | list_empty(&conn->ibc_tx_noops) ? "" : "(sending_noops)", | |
1887 | list_empty(&conn->ibc_tx_queue_rsrvd) ? "" : "(sending_rsrvd)", | |
1888 | list_empty(&conn->ibc_tx_queue_nocred) ? "" : "(sending_nocred)", | |
1889 | list_empty(&conn->ibc_active_txs) ? "" : "(waiting)"); | |
1890 | } | |
1891 | ||
1892 | dev = ((kib_net_t *)peer->ibp_ni->ni_data)->ibn_dev; | |
1893 | list_del(&conn->ibc_list); | |
1894 | /* connd (see below) takes over ibc_list's ref */ | |
1895 | ||
1896 | if (list_empty (&peer->ibp_conns) && /* no more conns */ | |
1897 | kiblnd_peer_active(peer)) { /* still in peer table */ | |
1898 | kiblnd_unlink_peer_locked(peer); | |
1899 | ||
1900 | /* set/clear error on last conn */ | |
1901 | peer->ibp_error = conn->ibc_comms_error; | |
1902 | } | |
1903 | ||
1904 | kiblnd_set_conn_state(conn, IBLND_CONN_CLOSING); | |
1905 | ||
1906 | if (error != 0 && | |
1907 | kiblnd_dev_can_failover(dev)) { | |
1908 | list_add_tail(&dev->ibd_fail_list, | |
1909 | &kiblnd_data.kib_failed_devs); | |
1910 | wake_up(&kiblnd_data.kib_failover_waitq); | |
1911 | } | |
1912 | ||
1913 | spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags); | |
1914 | ||
1915 | list_add_tail(&conn->ibc_list, &kiblnd_data.kib_connd_conns); | |
1916 | wake_up(&kiblnd_data.kib_connd_waitq); | |
1917 | ||
1918 | spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags); | |
1919 | } | |
1920 | ||
1921 | void | |
1922 | kiblnd_close_conn(kib_conn_t *conn, int error) | |
1923 | { | |
1924 | unsigned long flags; | |
1925 | ||
1926 | write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); | |
1927 | ||
1928 | kiblnd_close_conn_locked(conn, error); | |
1929 | ||
1930 | write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); | |
1931 | } | |
1932 | ||
1933 | void | |
1934 | kiblnd_handle_early_rxs(kib_conn_t *conn) | |
1935 | { | |
1936 | unsigned long flags; | |
1937 | kib_rx_t *rx; | |
1938 | ||
1939 | LASSERT(!in_interrupt()); | |
1940 | LASSERT(conn->ibc_state >= IBLND_CONN_ESTABLISHED); | |
1941 | ||
1942 | write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); | |
1943 | while (!list_empty(&conn->ibc_early_rxs)) { | |
1944 | rx = list_entry(conn->ibc_early_rxs.next, | |
1945 | kib_rx_t, rx_list); | |
1946 | list_del(&rx->rx_list); | |
1947 | write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); | |
1948 | ||
1949 | kiblnd_handle_rx(rx); | |
1950 | ||
1951 | write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); | |
1952 | } | |
1953 | write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); | |
1954 | } | |
1955 | ||
1956 | void | |
1957 | kiblnd_abort_txs(kib_conn_t *conn, struct list_head *txs) | |
1958 | { | |
1959 | LIST_HEAD (zombies); | |
1960 | struct list_head *tmp; | |
1961 | struct list_head *nxt; | |
1962 | kib_tx_t *tx; | |
1963 | ||
1964 | spin_lock(&conn->ibc_lock); | |
1965 | ||
1966 | list_for_each_safe (tmp, nxt, txs) { | |
1967 | tx = list_entry (tmp, kib_tx_t, tx_list); | |
1968 | ||
1969 | if (txs == &conn->ibc_active_txs) { | |
1970 | LASSERT (!tx->tx_queued); | |
1971 | LASSERT (tx->tx_waiting || | |
1972 | tx->tx_sending != 0); | |
1973 | } else { | |
1974 | LASSERT (tx->tx_queued); | |
1975 | } | |
1976 | ||
1977 | tx->tx_status = -ECONNABORTED; | |
1978 | tx->tx_waiting = 0; | |
1979 | ||
1980 | if (tx->tx_sending == 0) { | |
1981 | tx->tx_queued = 0; | |
1982 | list_del (&tx->tx_list); | |
1983 | list_add (&tx->tx_list, &zombies); | |
1984 | } | |
1985 | } | |
1986 | ||
1987 | spin_unlock(&conn->ibc_lock); | |
1988 | ||
1989 | kiblnd_txlist_done(conn->ibc_peer->ibp_ni, &zombies, -ECONNABORTED); | |
1990 | } | |
1991 | ||
1992 | void | |
1993 | kiblnd_finalise_conn (kib_conn_t *conn) | |
1994 | { | |
1995 | LASSERT (!in_interrupt()); | |
1996 | LASSERT (conn->ibc_state > IBLND_CONN_INIT); | |
1997 | ||
1998 | kiblnd_set_conn_state(conn, IBLND_CONN_DISCONNECTED); | |
1999 | ||
2000 | /* abort_receives moves QP state to IB_QPS_ERR. This is only required | |
2001 | * for connections that didn't get as far as being connected, because | |
2002 | * rdma_disconnect() does this for free. */ | |
2003 | kiblnd_abort_receives(conn); | |
2004 | ||
2005 | /* Complete all tx descs not waiting for sends to complete. | |
2006 | * NB we should be safe from RDMA now that the QP has changed state */ | |
2007 | ||
2008 | kiblnd_abort_txs(conn, &conn->ibc_tx_noops); | |
2009 | kiblnd_abort_txs(conn, &conn->ibc_tx_queue); | |
2010 | kiblnd_abort_txs(conn, &conn->ibc_tx_queue_rsrvd); | |
2011 | kiblnd_abort_txs(conn, &conn->ibc_tx_queue_nocred); | |
2012 | kiblnd_abort_txs(conn, &conn->ibc_active_txs); | |
2013 | ||
2014 | kiblnd_handle_early_rxs(conn); | |
2015 | } | |
2016 | ||
2017 | void | |
2018 | kiblnd_peer_connect_failed (kib_peer_t *peer, int active, int error) | |
2019 | { | |
2020 | LIST_HEAD (zombies); | |
2021 | unsigned long flags; | |
2022 | ||
2023 | LASSERT (error != 0); | |
2024 | LASSERT (!in_interrupt()); | |
2025 | ||
2026 | write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); | |
2027 | ||
2028 | if (active) { | |
2029 | LASSERT (peer->ibp_connecting > 0); | |
2030 | peer->ibp_connecting--; | |
2031 | } else { | |
2032 | LASSERT (peer->ibp_accepting > 0); | |
2033 | peer->ibp_accepting--; | |
2034 | } | |
2035 | ||
2036 | if (peer->ibp_connecting != 0 || | |
2037 | peer->ibp_accepting != 0) { | |
2038 | /* another connection attempt under way... */ | |
2039 | write_unlock_irqrestore(&kiblnd_data.kib_global_lock, | |
2040 | flags); | |
2041 | return; | |
2042 | } | |
2043 | ||
2044 | if (list_empty(&peer->ibp_conns)) { | |
2045 | /* Take peer's blocked transmits to complete with error */ | |
2046 | list_add(&zombies, &peer->ibp_tx_queue); | |
2047 | list_del_init(&peer->ibp_tx_queue); | |
2048 | ||
2049 | if (kiblnd_peer_active(peer)) | |
2050 | kiblnd_unlink_peer_locked(peer); | |
2051 | ||
2052 | peer->ibp_error = error; | |
2053 | } else { | |
2054 | /* Can't have blocked transmits if there are connections */ | |
2055 | LASSERT (list_empty(&peer->ibp_tx_queue)); | |
2056 | } | |
2057 | ||
2058 | write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); | |
2059 | ||
2060 | kiblnd_peer_notify(peer); | |
2061 | ||
2062 | if (list_empty (&zombies)) | |
2063 | return; | |
2064 | ||
2065 | CNETERR("Deleting messages for %s: connection failed\n", | |
2066 | libcfs_nid2str(peer->ibp_nid)); | |
2067 | ||
2068 | kiblnd_txlist_done(peer->ibp_ni, &zombies, -EHOSTUNREACH); | |
2069 | } | |
2070 | ||
2071 | void | |
2072 | kiblnd_connreq_done(kib_conn_t *conn, int status) | |
2073 | { | |
2074 | kib_peer_t *peer = conn->ibc_peer; | |
2075 | kib_tx_t *tx; | |
2076 | struct list_head txs; | |
2077 | unsigned long flags; | |
2078 | int active; | |
2079 | ||
2080 | active = (conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT); | |
2081 | ||
2082 | CDEBUG(D_NET,"%s: active(%d), version(%x), status(%d)\n", | |
2083 | libcfs_nid2str(peer->ibp_nid), active, | |
2084 | conn->ibc_version, status); | |
2085 | ||
2086 | LASSERT (!in_interrupt()); | |
2087 | LASSERT ((conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT && | |
2088 | peer->ibp_connecting > 0) || | |
2089 | (conn->ibc_state == IBLND_CONN_PASSIVE_WAIT && | |
2090 | peer->ibp_accepting > 0)); | |
2091 | ||
2092 | LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars)); | |
2093 | conn->ibc_connvars = NULL; | |
2094 | ||
2095 | if (status != 0) { | |
2096 | /* failed to establish connection */ | |
2097 | kiblnd_peer_connect_failed(peer, active, status); | |
2098 | kiblnd_finalise_conn(conn); | |
2099 | return; | |
2100 | } | |
2101 | ||
2102 | /* connection established */ | |
2103 | write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); | |
2104 | ||
2105 | conn->ibc_last_send = jiffies; | |
2106 | kiblnd_set_conn_state(conn, IBLND_CONN_ESTABLISHED); | |
2107 | kiblnd_peer_alive(peer); | |
2108 | ||
2109 | /* Add conn to peer's list and nuke any dangling conns from a different | |
2110 | * peer instance... */ | |
2111 | kiblnd_conn_addref(conn); /* +1 ref for ibc_list */ | |
2112 | list_add(&conn->ibc_list, &peer->ibp_conns); | |
2113 | if (active) | |
2114 | peer->ibp_connecting--; | |
2115 | else | |
2116 | peer->ibp_accepting--; | |
2117 | ||
2118 | if (peer->ibp_version == 0) { | |
2119 | peer->ibp_version = conn->ibc_version; | |
2120 | peer->ibp_incarnation = conn->ibc_incarnation; | |
2121 | } | |
2122 | ||
2123 | if (peer->ibp_version != conn->ibc_version || | |
2124 | peer->ibp_incarnation != conn->ibc_incarnation) { | |
2125 | kiblnd_close_stale_conns_locked(peer, conn->ibc_version, | |
2126 | conn->ibc_incarnation); | |
2127 | peer->ibp_version = conn->ibc_version; | |
2128 | peer->ibp_incarnation = conn->ibc_incarnation; | |
2129 | } | |
2130 | ||
2131 | /* grab pending txs while I have the lock */ | |
2132 | list_add(&txs, &peer->ibp_tx_queue); | |
2133 | list_del_init(&peer->ibp_tx_queue); | |
2134 | ||
2135 | if (!kiblnd_peer_active(peer) || /* peer has been deleted */ | |
2136 | conn->ibc_comms_error != 0) { /* error has happened already */ | |
2137 | lnet_ni_t *ni = peer->ibp_ni; | |
2138 | ||
2139 | /* start to shut down connection */ | |
2140 | kiblnd_close_conn_locked(conn, -ECONNABORTED); | |
2141 | write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); | |
2142 | ||
2143 | kiblnd_txlist_done(ni, &txs, -ECONNABORTED); | |
2144 | ||
2145 | return; | |
2146 | } | |
2147 | ||
2148 | write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); | |
2149 | ||
2150 | /* Schedule blocked txs */ | |
2151 | spin_lock(&conn->ibc_lock); | |
2152 | while (!list_empty(&txs)) { | |
2153 | tx = list_entry(txs.next, kib_tx_t, tx_list); | |
2154 | list_del(&tx->tx_list); | |
2155 | ||
2156 | kiblnd_queue_tx_locked(tx, conn); | |
2157 | } | |
2158 | spin_unlock(&conn->ibc_lock); | |
2159 | ||
2160 | kiblnd_check_sends(conn); | |
2161 | ||
2162 | /* schedule blocked rxs */ | |
2163 | kiblnd_handle_early_rxs(conn); | |
2164 | } | |
2165 | ||
2166 | void | |
2167 | kiblnd_reject(struct rdma_cm_id *cmid, kib_rej_t *rej) | |
2168 | { | |
2169 | int rc; | |
2170 | ||
2171 | rc = rdma_reject(cmid, rej, sizeof(*rej)); | |
2172 | ||
2173 | if (rc != 0) | |
2174 | CWARN("Error %d sending reject\n", rc); | |
2175 | } | |
2176 | ||
2177 | int | |
2178 | kiblnd_passive_connect (struct rdma_cm_id *cmid, void *priv, int priv_nob) | |
2179 | { | |
2180 | rwlock_t *g_lock = &kiblnd_data.kib_global_lock; | |
2181 | kib_msg_t *reqmsg = priv; | |
2182 | kib_msg_t *ackmsg; | |
2183 | kib_dev_t *ibdev; | |
2184 | kib_peer_t *peer; | |
2185 | kib_peer_t *peer2; | |
2186 | kib_conn_t *conn; | |
2187 | lnet_ni_t *ni = NULL; | |
2188 | kib_net_t *net = NULL; | |
2189 | lnet_nid_t nid; | |
2190 | struct rdma_conn_param cp; | |
2191 | kib_rej_t rej; | |
2192 | int version = IBLND_MSG_VERSION; | |
2193 | unsigned long flags; | |
2194 | int rc; | |
2195 | struct sockaddr_in *peer_addr; | |
2196 | LASSERT (!in_interrupt()); | |
2197 | ||
2198 | /* cmid inherits 'context' from the corresponding listener id */ | |
2199 | ibdev = (kib_dev_t *)cmid->context; | |
2200 | LASSERT (ibdev != NULL); | |
2201 | ||
2202 | memset(&rej, 0, sizeof(rej)); | |
2203 | rej.ibr_magic = IBLND_MSG_MAGIC; | |
2204 | rej.ibr_why = IBLND_REJECT_FATAL; | |
2205 | rej.ibr_cp.ibcp_max_msg_size = IBLND_MSG_SIZE; | |
2206 | ||
2207 | peer_addr = (struct sockaddr_in *)&(cmid->route.addr.dst_addr); | |
2208 | if (*kiblnd_tunables.kib_require_priv_port && | |
2209 | ntohs(peer_addr->sin_port) >= PROT_SOCK) { | |
2210 | __u32 ip = ntohl(peer_addr->sin_addr.s_addr); | |
5e8f6920 PT |
2211 | CERROR("Peer's port (%pI4h:%hu) is not privileged\n", |
2212 | &ip, ntohs(peer_addr->sin_port)); | |
d7e09d03 PT |
2213 | goto failed; |
2214 | } | |
2215 | ||
2216 | if (priv_nob < offsetof(kib_msg_t, ibm_type)) { | |
2217 | CERROR("Short connection request\n"); | |
2218 | goto failed; | |
2219 | } | |
2220 | ||
2221 | /* Future protocol version compatibility support! If the | |
2222 | * o2iblnd-specific protocol changes, or when LNET unifies | |
2223 | * protocols over all LNDs, the initial connection will | |
2224 | * negotiate a protocol version. I trap this here to avoid | |
2225 | * console errors; the reject tells the peer which protocol I | |
2226 | * speak. */ | |
2227 | if (reqmsg->ibm_magic == LNET_PROTO_MAGIC || | |
2228 | reqmsg->ibm_magic == __swab32(LNET_PROTO_MAGIC)) | |
2229 | goto failed; | |
2230 | if (reqmsg->ibm_magic == IBLND_MSG_MAGIC && | |
2231 | reqmsg->ibm_version != IBLND_MSG_VERSION && | |
2232 | reqmsg->ibm_version != IBLND_MSG_VERSION_1) | |
2233 | goto failed; | |
2234 | if (reqmsg->ibm_magic == __swab32(IBLND_MSG_MAGIC) && | |
2235 | reqmsg->ibm_version != __swab16(IBLND_MSG_VERSION) && | |
2236 | reqmsg->ibm_version != __swab16(IBLND_MSG_VERSION_1)) | |
2237 | goto failed; | |
2238 | ||
2239 | rc = kiblnd_unpack_msg(reqmsg, priv_nob); | |
2240 | if (rc != 0) { | |
2241 | CERROR("Can't parse connection request: %d\n", rc); | |
2242 | goto failed; | |
2243 | } | |
2244 | ||
2245 | nid = reqmsg->ibm_srcnid; | |
2246 | ni = lnet_net2ni(LNET_NIDNET(reqmsg->ibm_dstnid)); | |
2247 | ||
2248 | if (ni != NULL) { | |
2249 | net = (kib_net_t *)ni->ni_data; | |
2250 | rej.ibr_incarnation = net->ibn_incarnation; | |
2251 | } | |
2252 | ||
2253 | if (ni == NULL || /* no matching net */ | |
2254 | ni->ni_nid != reqmsg->ibm_dstnid || /* right NET, wrong NID! */ | |
2255 | net->ibn_dev != ibdev) { /* wrong device */ | |
5e8f6920 | 2256 | CERROR("Can't accept %s on %s (%s:%d:%pI4h): " |
d7e09d03 PT |
2257 | "bad dst nid %s\n", libcfs_nid2str(nid), |
2258 | ni == NULL ? "NA" : libcfs_nid2str(ni->ni_nid), | |
2259 | ibdev->ibd_ifname, ibdev->ibd_nnets, | |
5e8f6920 | 2260 | &ibdev->ibd_ifip, |
d7e09d03 PT |
2261 | libcfs_nid2str(reqmsg->ibm_dstnid)); |
2262 | ||
2263 | goto failed; | |
2264 | } | |
2265 | ||
2266 | /* check time stamp as soon as possible */ | |
2267 | if (reqmsg->ibm_dststamp != 0 && | |
2268 | reqmsg->ibm_dststamp != net->ibn_incarnation) { | |
2269 | CWARN("Stale connection request\n"); | |
2270 | rej.ibr_why = IBLND_REJECT_CONN_STALE; | |
2271 | goto failed; | |
2272 | } | |
2273 | ||
2274 | /* I can accept peer's version */ | |
2275 | version = reqmsg->ibm_version; | |
2276 | ||
2277 | if (reqmsg->ibm_type != IBLND_MSG_CONNREQ) { | |
2278 | CERROR("Unexpected connreq msg type: %x from %s\n", | |
2279 | reqmsg->ibm_type, libcfs_nid2str(nid)); | |
2280 | goto failed; | |
2281 | } | |
2282 | ||
2283 | if (reqmsg->ibm_u.connparams.ibcp_queue_depth != | |
2284 | IBLND_MSG_QUEUE_SIZE(version)) { | |
2285 | CERROR("Can't accept %s: incompatible queue depth %d (%d wanted)\n", | |
2286 | libcfs_nid2str(nid), reqmsg->ibm_u.connparams.ibcp_queue_depth, | |
2287 | IBLND_MSG_QUEUE_SIZE(version)); | |
2288 | ||
2289 | if (version == IBLND_MSG_VERSION) | |
2290 | rej.ibr_why = IBLND_REJECT_MSG_QUEUE_SIZE; | |
2291 | ||
2292 | goto failed; | |
2293 | } | |
2294 | ||
2295 | if (reqmsg->ibm_u.connparams.ibcp_max_frags != | |
2296 | IBLND_RDMA_FRAGS(version)) { | |
2297 | CERROR("Can't accept %s(version %x): " | |
2298 | "incompatible max_frags %d (%d wanted)\n", | |
2299 | libcfs_nid2str(nid), version, | |
2300 | reqmsg->ibm_u.connparams.ibcp_max_frags, | |
2301 | IBLND_RDMA_FRAGS(version)); | |
2302 | ||
2303 | if (version == IBLND_MSG_VERSION) | |
2304 | rej.ibr_why = IBLND_REJECT_RDMA_FRAGS; | |
2305 | ||
2306 | goto failed; | |
2307 | ||
2308 | } | |
2309 | ||
2310 | if (reqmsg->ibm_u.connparams.ibcp_max_msg_size > IBLND_MSG_SIZE) { | |
2311 | CERROR("Can't accept %s: message size %d too big (%d max)\n", | |
2312 | libcfs_nid2str(nid), | |
2313 | reqmsg->ibm_u.connparams.ibcp_max_msg_size, | |
2314 | IBLND_MSG_SIZE); | |
2315 | goto failed; | |
2316 | } | |
2317 | ||
2318 | /* assume 'nid' is a new peer; create */ | |
2319 | rc = kiblnd_create_peer(ni, &peer, nid); | |
2320 | if (rc != 0) { | |
2321 | CERROR("Can't create peer for %s\n", libcfs_nid2str(nid)); | |
2322 | rej.ibr_why = IBLND_REJECT_NO_RESOURCES; | |
2323 | goto failed; | |
2324 | } | |
2325 | ||
2326 | write_lock_irqsave(g_lock, flags); | |
2327 | ||
2328 | peer2 = kiblnd_find_peer_locked(nid); | |
2329 | if (peer2 != NULL) { | |
2330 | if (peer2->ibp_version == 0) { | |
2331 | peer2->ibp_version = version; | |
2332 | peer2->ibp_incarnation = reqmsg->ibm_srcstamp; | |
2333 | } | |
2334 | ||
2335 | /* not the guy I've talked with */ | |
2336 | if (peer2->ibp_incarnation != reqmsg->ibm_srcstamp || | |
2337 | peer2->ibp_version != version) { | |
2338 | kiblnd_close_peer_conns_locked(peer2, -ESTALE); | |
2339 | write_unlock_irqrestore(g_lock, flags); | |
2340 | ||
2341 | CWARN("Conn stale %s [old ver: %x, new ver: %x]\n", | |
2342 | libcfs_nid2str(nid), peer2->ibp_version, version); | |
2343 | ||
2344 | kiblnd_peer_decref(peer); | |
2345 | rej.ibr_why = IBLND_REJECT_CONN_STALE; | |
2346 | goto failed; | |
2347 | } | |
2348 | ||
2349 | /* tie-break connection race in favour of the higher NID */ | |
2350 | if (peer2->ibp_connecting != 0 && | |
2351 | nid < ni->ni_nid) { | |
2352 | write_unlock_irqrestore(g_lock, flags); | |
2353 | ||
2354 | CWARN("Conn race %s\n", libcfs_nid2str(peer2->ibp_nid)); | |
2355 | ||
2356 | kiblnd_peer_decref(peer); | |
2357 | rej.ibr_why = IBLND_REJECT_CONN_RACE; | |
2358 | goto failed; | |
2359 | } | |
2360 | ||
2361 | peer2->ibp_accepting++; | |
2362 | kiblnd_peer_addref(peer2); | |
2363 | ||
2364 | write_unlock_irqrestore(g_lock, flags); | |
2365 | kiblnd_peer_decref(peer); | |
2366 | peer = peer2; | |
2367 | } else { | |
2368 | /* Brand new peer */ | |
2369 | LASSERT (peer->ibp_accepting == 0); | |
2370 | LASSERT (peer->ibp_version == 0 && | |
2371 | peer->ibp_incarnation == 0); | |
2372 | ||
2373 | peer->ibp_accepting = 1; | |
2374 | peer->ibp_version = version; | |
2375 | peer->ibp_incarnation = reqmsg->ibm_srcstamp; | |
2376 | ||
2377 | /* I have a ref on ni that prevents it being shutdown */ | |
2378 | LASSERT (net->ibn_shutdown == 0); | |
2379 | ||
2380 | kiblnd_peer_addref(peer); | |
2381 | list_add_tail(&peer->ibp_list, kiblnd_nid2peerlist(nid)); | |
2382 | ||
2383 | write_unlock_irqrestore(g_lock, flags); | |
2384 | } | |
2385 | ||
2386 | conn = kiblnd_create_conn(peer, cmid, IBLND_CONN_PASSIVE_WAIT, version); | |
2387 | if (conn == NULL) { | |
2388 | kiblnd_peer_connect_failed(peer, 0, -ENOMEM); | |
2389 | kiblnd_peer_decref(peer); | |
2390 | rej.ibr_why = IBLND_REJECT_NO_RESOURCES; | |
2391 | goto failed; | |
2392 | } | |
2393 | ||
2394 | /* conn now "owns" cmid, so I return success from here on to ensure the | |
2395 | * CM callback doesn't destroy cmid. */ | |
2396 | ||
2397 | conn->ibc_incarnation = reqmsg->ibm_srcstamp; | |
2398 | conn->ibc_credits = IBLND_MSG_QUEUE_SIZE(version); | |
2399 | conn->ibc_reserved_credits = IBLND_MSG_QUEUE_SIZE(version); | |
2400 | LASSERT (conn->ibc_credits + conn->ibc_reserved_credits + IBLND_OOB_MSGS(version) | |
2401 | <= IBLND_RX_MSGS(version)); | |
2402 | ||
2403 | ackmsg = &conn->ibc_connvars->cv_msg; | |
2404 | memset(ackmsg, 0, sizeof(*ackmsg)); | |
2405 | ||
2406 | kiblnd_init_msg(ackmsg, IBLND_MSG_CONNACK, | |
2407 | sizeof(ackmsg->ibm_u.connparams)); | |
2408 | ackmsg->ibm_u.connparams.ibcp_queue_depth = IBLND_MSG_QUEUE_SIZE(version); | |
2409 | ackmsg->ibm_u.connparams.ibcp_max_msg_size = IBLND_MSG_SIZE; | |
2410 | ackmsg->ibm_u.connparams.ibcp_max_frags = IBLND_RDMA_FRAGS(version); | |
2411 | ||
2412 | kiblnd_pack_msg(ni, ackmsg, version, 0, nid, reqmsg->ibm_srcstamp); | |
2413 | ||
2414 | memset(&cp, 0, sizeof(cp)); | |
2415 | cp.private_data = ackmsg; | |
2416 | cp.private_data_len = ackmsg->ibm_nob; | |
2417 | cp.responder_resources = 0; /* No atomic ops or RDMA reads */ | |
2418 | cp.initiator_depth = 0; | |
2419 | cp.flow_control = 1; | |
2420 | cp.retry_count = *kiblnd_tunables.kib_retry_count; | |
2421 | cp.rnr_retry_count = *kiblnd_tunables.kib_rnr_retry_count; | |
2422 | ||
2423 | CDEBUG(D_NET, "Accept %s\n", libcfs_nid2str(nid)); | |
2424 | ||
2425 | rc = rdma_accept(cmid, &cp); | |
2426 | if (rc != 0) { | |
2427 | CERROR("Can't accept %s: %d\n", libcfs_nid2str(nid), rc); | |
2428 | rej.ibr_version = version; | |
2429 | rej.ibr_why = IBLND_REJECT_FATAL; | |
2430 | ||
2431 | kiblnd_reject(cmid, &rej); | |
2432 | kiblnd_connreq_done(conn, rc); | |
2433 | kiblnd_conn_decref(conn); | |
2434 | } | |
2435 | ||
2436 | lnet_ni_decref(ni); | |
2437 | return 0; | |
2438 | ||
2439 | failed: | |
2440 | if (ni != NULL) | |
2441 | lnet_ni_decref(ni); | |
2442 | ||
2443 | rej.ibr_version = version; | |
2444 | rej.ibr_cp.ibcp_queue_depth = IBLND_MSG_QUEUE_SIZE(version); | |
2445 | rej.ibr_cp.ibcp_max_frags = IBLND_RDMA_FRAGS(version); | |
2446 | kiblnd_reject(cmid, &rej); | |
2447 | ||
2448 | return -ECONNREFUSED; | |
2449 | } | |
2450 | ||
2451 | void | |
2452 | kiblnd_reconnect (kib_conn_t *conn, int version, | |
2453 | __u64 incarnation, int why, kib_connparams_t *cp) | |
2454 | { | |
2455 | kib_peer_t *peer = conn->ibc_peer; | |
2456 | char *reason; | |
2457 | int retry = 0; | |
2458 | unsigned long flags; | |
2459 | ||
2460 | LASSERT (conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT); | |
2461 | LASSERT (peer->ibp_connecting > 0); /* 'conn' at least */ | |
2462 | ||
2463 | write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); | |
2464 | ||
2465 | /* retry connection if it's still needed and no other connection | |
2466 | * attempts (active or passive) are in progress | |
2467 | * NB: reconnect is still needed even when ibp_tx_queue is | |
2468 | * empty if ibp_version != version because reconnect may be | |
2469 | * initiated by kiblnd_query() */ | |
2470 | if ((!list_empty(&peer->ibp_tx_queue) || | |
2471 | peer->ibp_version != version) && | |
2472 | peer->ibp_connecting == 1 && | |
2473 | peer->ibp_accepting == 0) { | |
2474 | retry = 1; | |
2475 | peer->ibp_connecting++; | |
2476 | ||
2477 | peer->ibp_version = version; | |
2478 | peer->ibp_incarnation = incarnation; | |
2479 | } | |
2480 | ||
2481 | write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); | |
2482 | ||
2483 | if (!retry) | |
2484 | return; | |
2485 | ||
2486 | switch (why) { | |
2487 | default: | |
2488 | reason = "Unknown"; | |
2489 | break; | |
2490 | ||
2491 | case IBLND_REJECT_CONN_STALE: | |
2492 | reason = "stale"; | |
2493 | break; | |
2494 | ||
2495 | case IBLND_REJECT_CONN_RACE: | |
2496 | reason = "conn race"; | |
2497 | break; | |
2498 | ||
2499 | case IBLND_REJECT_CONN_UNCOMPAT: | |
2500 | reason = "version negotiation"; | |
2501 | break; | |
2502 | } | |
2503 | ||
2504 | CNETERR("%s: retrying (%s), %x, %x, " | |
2505 | "queue_dep: %d, max_frag: %d, msg_size: %d\n", | |
2506 | libcfs_nid2str(peer->ibp_nid), | |
2507 | reason, IBLND_MSG_VERSION, version, | |
2508 | cp != NULL? cp->ibcp_queue_depth :IBLND_MSG_QUEUE_SIZE(version), | |
2509 | cp != NULL? cp->ibcp_max_frags : IBLND_RDMA_FRAGS(version), | |
2510 | cp != NULL? cp->ibcp_max_msg_size: IBLND_MSG_SIZE); | |
2511 | ||
2512 | kiblnd_connect_peer(peer); | |
2513 | } | |
2514 | ||
2515 | void | |
2516 | kiblnd_rejected (kib_conn_t *conn, int reason, void *priv, int priv_nob) | |
2517 | { | |
2518 | kib_peer_t *peer = conn->ibc_peer; | |
2519 | ||
2520 | LASSERT (!in_interrupt()); | |
2521 | LASSERT (conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT); | |
2522 | ||
2523 | switch (reason) { | |
2524 | case IB_CM_REJ_STALE_CONN: | |
2525 | kiblnd_reconnect(conn, IBLND_MSG_VERSION, 0, | |
2526 | IBLND_REJECT_CONN_STALE, NULL); | |
2527 | break; | |
2528 | ||
2529 | case IB_CM_REJ_INVALID_SERVICE_ID: | |
2530 | CNETERR("%s rejected: no listener at %d\n", | |
2531 | libcfs_nid2str(peer->ibp_nid), | |
2532 | *kiblnd_tunables.kib_service); | |
2533 | break; | |
2534 | ||
2535 | case IB_CM_REJ_CONSUMER_DEFINED: | |
2536 | if (priv_nob >= offsetof(kib_rej_t, ibr_padding)) { | |
2537 | kib_rej_t *rej = priv; | |
2538 | kib_connparams_t *cp = NULL; | |
2539 | int flip = 0; | |
2540 | __u64 incarnation = -1; | |
2541 | ||
2542 | /* NB. default incarnation is -1 because: | |
2543 | * a) V1 will ignore dst incarnation in connreq. | |
2544 | * b) V2 will provide incarnation while rejecting me, | |
2545 | * -1 will be overwrote. | |
2546 | * | |
2547 | * if I try to connect to a V1 peer with V2 protocol, | |
2548 | * it rejected me then upgrade to V2, I have no idea | |
2549 | * about the upgrading and try to reconnect with V1, | |
2550 | * in this case upgraded V2 can find out I'm trying to | |
2551 | * talk to the old guy and reject me(incarnation is -1). | |
2552 | */ | |
2553 | ||
2554 | if (rej->ibr_magic == __swab32(IBLND_MSG_MAGIC) || | |
2555 | rej->ibr_magic == __swab32(LNET_PROTO_MAGIC)) { | |
2556 | __swab32s(&rej->ibr_magic); | |
2557 | __swab16s(&rej->ibr_version); | |
2558 | flip = 1; | |
2559 | } | |
2560 | ||
2561 | if (priv_nob >= sizeof(kib_rej_t) && | |
2562 | rej->ibr_version > IBLND_MSG_VERSION_1) { | |
2563 | /* priv_nob is always 148 in current version | |
2564 | * of OFED, so we still need to check version. | |
2565 | * (define of IB_CM_REJ_PRIVATE_DATA_SIZE) */ | |
2566 | cp = &rej->ibr_cp; | |
2567 | ||
2568 | if (flip) { | |
2569 | __swab64s(&rej->ibr_incarnation); | |
2570 | __swab16s(&cp->ibcp_queue_depth); | |
2571 | __swab16s(&cp->ibcp_max_frags); | |
2572 | __swab32s(&cp->ibcp_max_msg_size); | |
2573 | } | |
2574 | ||
2575 | incarnation = rej->ibr_incarnation; | |
2576 | } | |
2577 | ||
2578 | if (rej->ibr_magic != IBLND_MSG_MAGIC && | |
2579 | rej->ibr_magic != LNET_PROTO_MAGIC) { | |
2580 | CERROR("%s rejected: consumer defined fatal error\n", | |
2581 | libcfs_nid2str(peer->ibp_nid)); | |
2582 | break; | |
2583 | } | |
2584 | ||
2585 | if (rej->ibr_version != IBLND_MSG_VERSION && | |
2586 | rej->ibr_version != IBLND_MSG_VERSION_1) { | |
2587 | CERROR("%s rejected: o2iblnd version %x error\n", | |
2588 | libcfs_nid2str(peer->ibp_nid), | |
2589 | rej->ibr_version); | |
2590 | break; | |
2591 | } | |
2592 | ||
2593 | if (rej->ibr_why == IBLND_REJECT_FATAL && | |
2594 | rej->ibr_version == IBLND_MSG_VERSION_1) { | |
2595 | CDEBUG(D_NET, "rejected by old version peer %s: %x\n", | |
2596 | libcfs_nid2str(peer->ibp_nid), rej->ibr_version); | |
2597 | ||
2598 | if (conn->ibc_version != IBLND_MSG_VERSION_1) | |
2599 | rej->ibr_why = IBLND_REJECT_CONN_UNCOMPAT; | |
2600 | } | |
2601 | ||
2602 | switch (rej->ibr_why) { | |
2603 | case IBLND_REJECT_CONN_RACE: | |
2604 | case IBLND_REJECT_CONN_STALE: | |
2605 | case IBLND_REJECT_CONN_UNCOMPAT: | |
2606 | kiblnd_reconnect(conn, rej->ibr_version, | |
2607 | incarnation, rej->ibr_why, cp); | |
2608 | break; | |
2609 | ||
2610 | case IBLND_REJECT_MSG_QUEUE_SIZE: | |
2611 | CERROR("%s rejected: incompatible message queue depth %d, %d\n", | |
2612 | libcfs_nid2str(peer->ibp_nid), cp->ibcp_queue_depth, | |
2613 | IBLND_MSG_QUEUE_SIZE(conn->ibc_version)); | |
2614 | break; | |
2615 | ||
2616 | case IBLND_REJECT_RDMA_FRAGS: | |
2617 | CERROR("%s rejected: incompatible # of RDMA fragments %d, %d\n", | |
2618 | libcfs_nid2str(peer->ibp_nid), cp->ibcp_max_frags, | |
2619 | IBLND_RDMA_FRAGS(conn->ibc_version)); | |
2620 | break; | |
2621 | ||
2622 | case IBLND_REJECT_NO_RESOURCES: | |
2623 | CERROR("%s rejected: o2iblnd no resources\n", | |
2624 | libcfs_nid2str(peer->ibp_nid)); | |
2625 | break; | |
2626 | ||
2627 | case IBLND_REJECT_FATAL: | |
2628 | CERROR("%s rejected: o2iblnd fatal error\n", | |
2629 | libcfs_nid2str(peer->ibp_nid)); | |
2630 | break; | |
2631 | ||
2632 | default: | |
2633 | CERROR("%s rejected: o2iblnd reason %d\n", | |
2634 | libcfs_nid2str(peer->ibp_nid), | |
2635 | rej->ibr_why); | |
2636 | break; | |
2637 | } | |
2638 | break; | |
2639 | } | |
2640 | /* fall through */ | |
2641 | default: | |
2642 | CNETERR("%s rejected: reason %d, size %d\n", | |
2643 | libcfs_nid2str(peer->ibp_nid), reason, priv_nob); | |
2644 | break; | |
2645 | } | |
2646 | ||
2647 | kiblnd_connreq_done(conn, -ECONNREFUSED); | |
2648 | } | |
2649 | ||
2650 | void | |
2651 | kiblnd_check_connreply (kib_conn_t *conn, void *priv, int priv_nob) | |
2652 | { | |
2653 | kib_peer_t *peer = conn->ibc_peer; | |
2654 | lnet_ni_t *ni = peer->ibp_ni; | |
2655 | kib_net_t *net = ni->ni_data; | |
2656 | kib_msg_t *msg = priv; | |
2657 | int ver = conn->ibc_version; | |
2658 | int rc = kiblnd_unpack_msg(msg, priv_nob); | |
2659 | unsigned long flags; | |
2660 | ||
2661 | LASSERT (net != NULL); | |
2662 | ||
2663 | if (rc != 0) { | |
2664 | CERROR("Can't unpack connack from %s: %d\n", | |
2665 | libcfs_nid2str(peer->ibp_nid), rc); | |
2666 | goto failed; | |
2667 | } | |
2668 | ||
2669 | if (msg->ibm_type != IBLND_MSG_CONNACK) { | |
2670 | CERROR("Unexpected message %d from %s\n", | |
2671 | msg->ibm_type, libcfs_nid2str(peer->ibp_nid)); | |
2672 | rc = -EPROTO; | |
2673 | goto failed; | |
2674 | } | |
2675 | ||
2676 | if (ver != msg->ibm_version) { | |
2677 | CERROR("%s replied version %x is different with " | |
2678 | "requested version %x\n", | |
2679 | libcfs_nid2str(peer->ibp_nid), msg->ibm_version, ver); | |
2680 | rc = -EPROTO; | |
2681 | goto failed; | |
2682 | } | |
2683 | ||
2684 | if (msg->ibm_u.connparams.ibcp_queue_depth != | |
2685 | IBLND_MSG_QUEUE_SIZE(ver)) { | |
2686 | CERROR("%s has incompatible queue depth %d(%d wanted)\n", | |
2687 | libcfs_nid2str(peer->ibp_nid), | |
2688 | msg->ibm_u.connparams.ibcp_queue_depth, | |
2689 | IBLND_MSG_QUEUE_SIZE(ver)); | |
2690 | rc = -EPROTO; | |
2691 | goto failed; | |
2692 | } | |
2693 | ||
2694 | if (msg->ibm_u.connparams.ibcp_max_frags != | |
2695 | IBLND_RDMA_FRAGS(ver)) { | |
2696 | CERROR("%s has incompatible max_frags %d (%d wanted)\n", | |
2697 | libcfs_nid2str(peer->ibp_nid), | |
2698 | msg->ibm_u.connparams.ibcp_max_frags, | |
2699 | IBLND_RDMA_FRAGS(ver)); | |
2700 | rc = -EPROTO; | |
2701 | goto failed; | |
2702 | } | |
2703 | ||
2704 | if (msg->ibm_u.connparams.ibcp_max_msg_size > IBLND_MSG_SIZE) { | |
2705 | CERROR("%s max message size %d too big (%d max)\n", | |
2706 | libcfs_nid2str(peer->ibp_nid), | |
2707 | msg->ibm_u.connparams.ibcp_max_msg_size, | |
2708 | IBLND_MSG_SIZE); | |
2709 | rc = -EPROTO; | |
2710 | goto failed; | |
2711 | } | |
2712 | ||
2713 | read_lock_irqsave(&kiblnd_data.kib_global_lock, flags); | |
2714 | if (msg->ibm_dstnid == ni->ni_nid && | |
2715 | msg->ibm_dststamp == net->ibn_incarnation) | |
2716 | rc = 0; | |
2717 | else | |
2718 | rc = -ESTALE; | |
2719 | read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); | |
2720 | ||
2721 | if (rc != 0) { | |
2722 | CERROR("Bad connection reply from %s, rc = %d, " | |
2723 | "version: %x max_frags: %d\n", | |
2724 | libcfs_nid2str(peer->ibp_nid), rc, | |
2725 | msg->ibm_version, msg->ibm_u.connparams.ibcp_max_frags); | |
2726 | goto failed; | |
2727 | } | |
2728 | ||
2729 | conn->ibc_incarnation = msg->ibm_srcstamp; | |
2730 | conn->ibc_credits = | |
2731 | conn->ibc_reserved_credits = IBLND_MSG_QUEUE_SIZE(ver); | |
2732 | LASSERT (conn->ibc_credits + conn->ibc_reserved_credits + IBLND_OOB_MSGS(ver) | |
2733 | <= IBLND_RX_MSGS(ver)); | |
2734 | ||
2735 | kiblnd_connreq_done(conn, 0); | |
2736 | return; | |
2737 | ||
2738 | failed: | |
2739 | /* NB My QP has already established itself, so I handle anything going | |
2740 | * wrong here by setting ibc_comms_error. | |
2741 | * kiblnd_connreq_done(0) moves the conn state to ESTABLISHED, but then | |
2742 | * immediately tears it down. */ | |
2743 | ||
2744 | LASSERT (rc != 0); | |
2745 | conn->ibc_comms_error = rc; | |
2746 | kiblnd_connreq_done(conn, 0); | |
2747 | } | |
2748 | ||
2749 | int | |
2750 | kiblnd_active_connect (struct rdma_cm_id *cmid) | |
2751 | { | |
2752 | kib_peer_t *peer = (kib_peer_t *)cmid->context; | |
2753 | kib_conn_t *conn; | |
2754 | kib_msg_t *msg; | |
2755 | struct rdma_conn_param cp; | |
2756 | int version; | |
2757 | __u64 incarnation; | |
2758 | unsigned long flags; | |
2759 | int rc; | |
2760 | ||
2761 | read_lock_irqsave(&kiblnd_data.kib_global_lock, flags); | |
2762 | ||
2763 | incarnation = peer->ibp_incarnation; | |
2764 | version = (peer->ibp_version == 0) ? IBLND_MSG_VERSION : | |
2765 | peer->ibp_version; | |
2766 | ||
2767 | read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); | |
2768 | ||
2769 | conn = kiblnd_create_conn(peer, cmid, IBLND_CONN_ACTIVE_CONNECT, version); | |
2770 | if (conn == NULL) { | |
2771 | kiblnd_peer_connect_failed(peer, 1, -ENOMEM); | |
2772 | kiblnd_peer_decref(peer); /* lose cmid's ref */ | |
2773 | return -ENOMEM; | |
2774 | } | |
2775 | ||
2776 | /* conn "owns" cmid now, so I return success from here on to ensure the | |
2777 | * CM callback doesn't destroy cmid. conn also takes over cmid's ref | |
2778 | * on peer */ | |
2779 | ||
2780 | msg = &conn->ibc_connvars->cv_msg; | |
2781 | ||
2782 | memset(msg, 0, sizeof(*msg)); | |
2783 | kiblnd_init_msg(msg, IBLND_MSG_CONNREQ, sizeof(msg->ibm_u.connparams)); | |
2784 | msg->ibm_u.connparams.ibcp_queue_depth = IBLND_MSG_QUEUE_SIZE(version); | |
2785 | msg->ibm_u.connparams.ibcp_max_frags = IBLND_RDMA_FRAGS(version); | |
2786 | msg->ibm_u.connparams.ibcp_max_msg_size = IBLND_MSG_SIZE; | |
2787 | ||
2788 | kiblnd_pack_msg(peer->ibp_ni, msg, version, | |
2789 | 0, peer->ibp_nid, incarnation); | |
2790 | ||
2791 | memset(&cp, 0, sizeof(cp)); | |
2792 | cp.private_data = msg; | |
2793 | cp.private_data_len = msg->ibm_nob; | |
2794 | cp.responder_resources = 0; /* No atomic ops or RDMA reads */ | |
2795 | cp.initiator_depth = 0; | |
2796 | cp.flow_control = 1; | |
2797 | cp.retry_count = *kiblnd_tunables.kib_retry_count; | |
2798 | cp.rnr_retry_count = *kiblnd_tunables.kib_rnr_retry_count; | |
2799 | ||
2800 | LASSERT(cmid->context == (void *)conn); | |
2801 | LASSERT(conn->ibc_cmid == cmid); | |
2802 | ||
2803 | rc = rdma_connect(cmid, &cp); | |
2804 | if (rc != 0) { | |
2805 | CERROR("Can't connect to %s: %d\n", | |
2806 | libcfs_nid2str(peer->ibp_nid), rc); | |
2807 | kiblnd_connreq_done(conn, rc); | |
2808 | kiblnd_conn_decref(conn); | |
2809 | } | |
2810 | ||
2811 | return 0; | |
2812 | } | |
2813 | ||
2814 | int | |
2815 | kiblnd_cm_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event) | |
2816 | { | |
2817 | kib_peer_t *peer; | |
2818 | kib_conn_t *conn; | |
2819 | int rc; | |
2820 | ||
2821 | switch (event->event) { | |
2822 | default: | |
2823 | CERROR("Unexpected event: %d, status: %d\n", | |
2824 | event->event, event->status); | |
2825 | LBUG(); | |
2826 | ||
2827 | case RDMA_CM_EVENT_CONNECT_REQUEST: | |
2828 | /* destroy cmid on failure */ | |
2829 | rc = kiblnd_passive_connect(cmid, | |
2830 | (void *)KIBLND_CONN_PARAM(event), | |
2831 | KIBLND_CONN_PARAM_LEN(event)); | |
2832 | CDEBUG(D_NET, "connreq: %d\n", rc); | |
2833 | return rc; | |
2834 | ||
2835 | case RDMA_CM_EVENT_ADDR_ERROR: | |
2836 | peer = (kib_peer_t *)cmid->context; | |
2837 | CNETERR("%s: ADDR ERROR %d\n", | |
2838 | libcfs_nid2str(peer->ibp_nid), event->status); | |
2839 | kiblnd_peer_connect_failed(peer, 1, -EHOSTUNREACH); | |
2840 | kiblnd_peer_decref(peer); | |
2841 | return -EHOSTUNREACH; /* rc != 0 destroys cmid */ | |
2842 | ||
2843 | case RDMA_CM_EVENT_ADDR_RESOLVED: | |
2844 | peer = (kib_peer_t *)cmid->context; | |
2845 | ||
2846 | CDEBUG(D_NET,"%s Addr resolved: %d\n", | |
2847 | libcfs_nid2str(peer->ibp_nid), event->status); | |
2848 | ||
2849 | if (event->status != 0) { | |
2850 | CNETERR("Can't resolve address for %s: %d\n", | |
2851 | libcfs_nid2str(peer->ibp_nid), event->status); | |
2852 | rc = event->status; | |
2853 | } else { | |
2854 | rc = rdma_resolve_route( | |
2855 | cmid, *kiblnd_tunables.kib_timeout * 1000); | |
2856 | if (rc == 0) | |
2857 | return 0; | |
2858 | /* Can't initiate route resolution */ | |
2859 | CERROR("Can't resolve route for %s: %d\n", | |
2860 | libcfs_nid2str(peer->ibp_nid), rc); | |
2861 | } | |
2862 | kiblnd_peer_connect_failed(peer, 1, rc); | |
2863 | kiblnd_peer_decref(peer); | |
2864 | return rc; /* rc != 0 destroys cmid */ | |
2865 | ||
2866 | case RDMA_CM_EVENT_ROUTE_ERROR: | |
2867 | peer = (kib_peer_t *)cmid->context; | |
2868 | CNETERR("%s: ROUTE ERROR %d\n", | |
2869 | libcfs_nid2str(peer->ibp_nid), event->status); | |
2870 | kiblnd_peer_connect_failed(peer, 1, -EHOSTUNREACH); | |
2871 | kiblnd_peer_decref(peer); | |
2872 | return -EHOSTUNREACH; /* rc != 0 destroys cmid */ | |
2873 | ||
2874 | case RDMA_CM_EVENT_ROUTE_RESOLVED: | |
2875 | peer = (kib_peer_t *)cmid->context; | |
2876 | CDEBUG(D_NET,"%s Route resolved: %d\n", | |
2877 | libcfs_nid2str(peer->ibp_nid), event->status); | |
2878 | ||
2879 | if (event->status == 0) | |
2880 | return kiblnd_active_connect(cmid); | |
2881 | ||
2882 | CNETERR("Can't resolve route for %s: %d\n", | |
2883 | libcfs_nid2str(peer->ibp_nid), event->status); | |
2884 | kiblnd_peer_connect_failed(peer, 1, event->status); | |
2885 | kiblnd_peer_decref(peer); | |
2886 | return event->status; /* rc != 0 destroys cmid */ | |
2887 | ||
2888 | case RDMA_CM_EVENT_UNREACHABLE: | |
2889 | conn = (kib_conn_t *)cmid->context; | |
2890 | LASSERT(conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT || | |
2891 | conn->ibc_state == IBLND_CONN_PASSIVE_WAIT); | |
2892 | CNETERR("%s: UNREACHABLE %d\n", | |
2893 | libcfs_nid2str(conn->ibc_peer->ibp_nid), event->status); | |
2894 | kiblnd_connreq_done(conn, -ENETDOWN); | |
2895 | kiblnd_conn_decref(conn); | |
2896 | return 0; | |
2897 | ||
2898 | case RDMA_CM_EVENT_CONNECT_ERROR: | |
2899 | conn = (kib_conn_t *)cmid->context; | |
2900 | LASSERT(conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT || | |
2901 | conn->ibc_state == IBLND_CONN_PASSIVE_WAIT); | |
2902 | CNETERR("%s: CONNECT ERROR %d\n", | |
2903 | libcfs_nid2str(conn->ibc_peer->ibp_nid), event->status); | |
2904 | kiblnd_connreq_done(conn, -ENOTCONN); | |
2905 | kiblnd_conn_decref(conn); | |
2906 | return 0; | |
2907 | ||
2908 | case RDMA_CM_EVENT_REJECTED: | |
2909 | conn = (kib_conn_t *)cmid->context; | |
2910 | switch (conn->ibc_state) { | |
2911 | default: | |
2912 | LBUG(); | |
2913 | ||
2914 | case IBLND_CONN_PASSIVE_WAIT: | |
2915 | CERROR ("%s: REJECTED %d\n", | |
2916 | libcfs_nid2str(conn->ibc_peer->ibp_nid), | |
2917 | event->status); | |
2918 | kiblnd_connreq_done(conn, -ECONNRESET); | |
2919 | break; | |
2920 | ||
2921 | case IBLND_CONN_ACTIVE_CONNECT: | |
2922 | kiblnd_rejected(conn, event->status, | |
2923 | (void *)KIBLND_CONN_PARAM(event), | |
2924 | KIBLND_CONN_PARAM_LEN(event)); | |
2925 | break; | |
2926 | } | |
2927 | kiblnd_conn_decref(conn); | |
2928 | return 0; | |
2929 | ||
2930 | case RDMA_CM_EVENT_ESTABLISHED: | |
2931 | conn = (kib_conn_t *)cmid->context; | |
2932 | switch (conn->ibc_state) { | |
2933 | default: | |
2934 | LBUG(); | |
2935 | ||
2936 | case IBLND_CONN_PASSIVE_WAIT: | |
2937 | CDEBUG(D_NET, "ESTABLISHED (passive): %s\n", | |
2938 | libcfs_nid2str(conn->ibc_peer->ibp_nid)); | |
2939 | kiblnd_connreq_done(conn, 0); | |
2940 | break; | |
2941 | ||
2942 | case IBLND_CONN_ACTIVE_CONNECT: | |
2943 | CDEBUG(D_NET, "ESTABLISHED(active): %s\n", | |
2944 | libcfs_nid2str(conn->ibc_peer->ibp_nid)); | |
2945 | kiblnd_check_connreply(conn, | |
2946 | (void *)KIBLND_CONN_PARAM(event), | |
2947 | KIBLND_CONN_PARAM_LEN(event)); | |
2948 | break; | |
2949 | } | |
2950 | /* net keeps its ref on conn! */ | |
2951 | return 0; | |
2952 | ||
2953 | case RDMA_CM_EVENT_TIMEWAIT_EXIT: | |
2954 | CDEBUG(D_NET, "Ignore TIMEWAIT_EXIT event\n"); | |
2955 | return 0; | |
2956 | case RDMA_CM_EVENT_DISCONNECTED: | |
2957 | conn = (kib_conn_t *)cmid->context; | |
2958 | if (conn->ibc_state < IBLND_CONN_ESTABLISHED) { | |
2959 | CERROR("%s DISCONNECTED\n", | |
2960 | libcfs_nid2str(conn->ibc_peer->ibp_nid)); | |
2961 | kiblnd_connreq_done(conn, -ECONNRESET); | |
2962 | } else { | |
2963 | kiblnd_close_conn(conn, 0); | |
2964 | } | |
2965 | kiblnd_conn_decref(conn); | |
2966 | cmid->context = NULL; | |
2967 | return 0; | |
2968 | ||
2969 | case RDMA_CM_EVENT_DEVICE_REMOVAL: | |
2970 | LCONSOLE_ERROR_MSG(0x131, | |
2971 | "Received notification of device removal\n" | |
2972 | "Please shutdown LNET to allow this to proceed\n"); | |
2973 | /* Can't remove network from underneath LNET for now, so I have | |
2974 | * to ignore this */ | |
2975 | return 0; | |
2976 | ||
2977 | case RDMA_CM_EVENT_ADDR_CHANGE: | |
2978 | LCONSOLE_INFO("Physical link changed (eg hca/port)\n"); | |
2979 | return 0; | |
2980 | } | |
2981 | } | |
2982 | ||
2983 | static int | |
2984 | kiblnd_check_txs_locked(kib_conn_t *conn, struct list_head *txs) | |
2985 | { | |
2986 | kib_tx_t *tx; | |
2987 | struct list_head *ttmp; | |
2988 | ||
2989 | list_for_each (ttmp, txs) { | |
2990 | tx = list_entry (ttmp, kib_tx_t, tx_list); | |
2991 | ||
2992 | if (txs != &conn->ibc_active_txs) { | |
2993 | LASSERT (tx->tx_queued); | |
2994 | } else { | |
2995 | LASSERT (!tx->tx_queued); | |
2996 | LASSERT (tx->tx_waiting || tx->tx_sending != 0); | |
2997 | } | |
2998 | ||
2999 | if (cfs_time_aftereq (jiffies, tx->tx_deadline)) { | |
3000 | CERROR("Timed out tx: %s, %lu seconds\n", | |
3001 | kiblnd_queue2str(conn, txs), | |
3002 | cfs_duration_sec(jiffies - tx->tx_deadline)); | |
3003 | return 1; | |
3004 | } | |
3005 | } | |
3006 | ||
3007 | return 0; | |
3008 | } | |
3009 | ||
3010 | static int | |
3011 | kiblnd_conn_timed_out_locked(kib_conn_t *conn) | |
3012 | { | |
3013 | return kiblnd_check_txs_locked(conn, &conn->ibc_tx_queue) || | |
3014 | kiblnd_check_txs_locked(conn, &conn->ibc_tx_noops) || | |
3015 | kiblnd_check_txs_locked(conn, &conn->ibc_tx_queue_rsrvd) || | |
3016 | kiblnd_check_txs_locked(conn, &conn->ibc_tx_queue_nocred) || | |
3017 | kiblnd_check_txs_locked(conn, &conn->ibc_active_txs); | |
3018 | } | |
3019 | ||
3020 | void | |
3021 | kiblnd_check_conns (int idx) | |
3022 | { | |
3023 | LIST_HEAD (closes); | |
3024 | LIST_HEAD (checksends); | |
3025 | struct list_head *peers = &kiblnd_data.kib_peers[idx]; | |
3026 | struct list_head *ptmp; | |
3027 | kib_peer_t *peer; | |
3028 | kib_conn_t *conn; | |
3029 | struct list_head *ctmp; | |
3030 | unsigned long flags; | |
3031 | ||
3032 | /* NB. We expect to have a look at all the peers and not find any | |
3033 | * RDMAs to time out, so we just use a shared lock while we | |
3034 | * take a look... */ | |
3035 | read_lock_irqsave(&kiblnd_data.kib_global_lock, flags); | |
3036 | ||
3037 | list_for_each (ptmp, peers) { | |
3038 | peer = list_entry (ptmp, kib_peer_t, ibp_list); | |
3039 | ||
3040 | list_for_each (ctmp, &peer->ibp_conns) { | |
3041 | int timedout; | |
3042 | int sendnoop; | |
3043 | ||
3044 | conn = list_entry(ctmp, kib_conn_t, ibc_list); | |
3045 | ||
3046 | LASSERT (conn->ibc_state == IBLND_CONN_ESTABLISHED); | |
3047 | ||
3048 | spin_lock(&conn->ibc_lock); | |
3049 | ||
3050 | sendnoop = kiblnd_need_noop(conn); | |
3051 | timedout = kiblnd_conn_timed_out_locked(conn); | |
3052 | if (!sendnoop && !timedout) { | |
3053 | spin_unlock(&conn->ibc_lock); | |
3054 | continue; | |
3055 | } | |
3056 | ||
3057 | if (timedout) { | |
3058 | CERROR("Timed out RDMA with %s (%lu): " | |
3059 | "c: %u, oc: %u, rc: %u\n", | |
3060 | libcfs_nid2str(peer->ibp_nid), | |
3061 | cfs_duration_sec(cfs_time_current() - | |
3062 | peer->ibp_last_alive), | |
3063 | conn->ibc_credits, | |
3064 | conn->ibc_outstanding_credits, | |
3065 | conn->ibc_reserved_credits); | |
3066 | list_add(&conn->ibc_connd_list, &closes); | |
3067 | } else { | |
3068 | list_add(&conn->ibc_connd_list, | |
3069 | &checksends); | |
3070 | } | |
3071 | /* +ref for 'closes' or 'checksends' */ | |
3072 | kiblnd_conn_addref(conn); | |
3073 | ||
3074 | spin_unlock(&conn->ibc_lock); | |
3075 | } | |
3076 | } | |
3077 | ||
3078 | read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); | |
3079 | ||
3080 | /* Handle timeout by closing the whole | |
3081 | * connection. We can only be sure RDMA activity | |
3082 | * has ceased once the QP has been modified. */ | |
3083 | while (!list_empty(&closes)) { | |
3084 | conn = list_entry(closes.next, | |
3085 | kib_conn_t, ibc_connd_list); | |
3086 | list_del(&conn->ibc_connd_list); | |
3087 | kiblnd_close_conn(conn, -ETIMEDOUT); | |
3088 | kiblnd_conn_decref(conn); | |
3089 | } | |
3090 | ||
3091 | /* In case we have enough credits to return via a | |
3092 | * NOOP, but there were no non-blocking tx descs | |
3093 | * free to do it last time... */ | |
3094 | while (!list_empty(&checksends)) { | |
3095 | conn = list_entry(checksends.next, | |
3096 | kib_conn_t, ibc_connd_list); | |
3097 | list_del(&conn->ibc_connd_list); | |
3098 | kiblnd_check_sends(conn); | |
3099 | kiblnd_conn_decref(conn); | |
3100 | } | |
3101 | } | |
3102 | ||
3103 | void | |
3104 | kiblnd_disconnect_conn (kib_conn_t *conn) | |
3105 | { | |
3106 | LASSERT (!in_interrupt()); | |
3107 | LASSERT (current == kiblnd_data.kib_connd); | |
3108 | LASSERT (conn->ibc_state == IBLND_CONN_CLOSING); | |
3109 | ||
3110 | rdma_disconnect(conn->ibc_cmid); | |
3111 | kiblnd_finalise_conn(conn); | |
3112 | ||
3113 | kiblnd_peer_notify(conn->ibc_peer); | |
3114 | } | |
3115 | ||
3116 | int | |
3117 | kiblnd_connd (void *arg) | |
3118 | { | |
3119 | wait_queue_t wait; | |
3120 | unsigned long flags; | |
3121 | kib_conn_t *conn; | |
3122 | int timeout; | |
3123 | int i; | |
3124 | int dropped_lock; | |
3125 | int peer_index = 0; | |
3126 | unsigned long deadline = jiffies; | |
3127 | ||
3128 | cfs_block_allsigs (); | |
3129 | ||
3130 | init_waitqueue_entry_current (&wait); | |
3131 | kiblnd_data.kib_connd = current; | |
3132 | ||
3133 | spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags); | |
3134 | ||
3135 | while (!kiblnd_data.kib_shutdown) { | |
3136 | ||
3137 | dropped_lock = 0; | |
3138 | ||
3139 | if (!list_empty (&kiblnd_data.kib_connd_zombies)) { | |
3140 | conn = list_entry(kiblnd_data. \ | |
3141 | kib_connd_zombies.next, | |
3142 | kib_conn_t, ibc_list); | |
3143 | list_del(&conn->ibc_list); | |
3144 | ||
3145 | spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, | |
3146 | flags); | |
3147 | dropped_lock = 1; | |
3148 | ||
3149 | kiblnd_destroy_conn(conn); | |
3150 | ||
3151 | spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags); | |
3152 | } | |
3153 | ||
3154 | if (!list_empty(&kiblnd_data.kib_connd_conns)) { | |
3155 | conn = list_entry(kiblnd_data.kib_connd_conns.next, | |
3156 | kib_conn_t, ibc_list); | |
3157 | list_del(&conn->ibc_list); | |
3158 | ||
3159 | spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, | |
3160 | flags); | |
3161 | dropped_lock = 1; | |
3162 | ||
3163 | kiblnd_disconnect_conn(conn); | |
3164 | kiblnd_conn_decref(conn); | |
3165 | ||
3166 | spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags); | |
3167 | } | |
3168 | ||
3169 | /* careful with the jiffy wrap... */ | |
3170 | timeout = (int)(deadline - jiffies); | |
3171 | if (timeout <= 0) { | |
3172 | const int n = 4; | |
3173 | const int p = 1; | |
3174 | int chunk = kiblnd_data.kib_peer_hash_size; | |
3175 | ||
3176 | spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags); | |
3177 | dropped_lock = 1; | |
3178 | ||
3179 | /* Time to check for RDMA timeouts on a few more | |
3180 | * peers: I do checks every 'p' seconds on a | |
3181 | * proportion of the peer table and I need to check | |
3182 | * every connection 'n' times within a timeout | |
3183 | * interval, to ensure I detect a timeout on any | |
3184 | * connection within (n+1)/n times the timeout | |
3185 | * interval. */ | |
3186 | ||
3187 | if (*kiblnd_tunables.kib_timeout > n * p) | |
3188 | chunk = (chunk * n * p) / | |
3189 | *kiblnd_tunables.kib_timeout; | |
3190 | if (chunk == 0) | |
3191 | chunk = 1; | |
3192 | ||
3193 | for (i = 0; i < chunk; i++) { | |
3194 | kiblnd_check_conns(peer_index); | |
3195 | peer_index = (peer_index + 1) % | |
3196 | kiblnd_data.kib_peer_hash_size; | |
3197 | } | |
3198 | ||
3199 | deadline += p * HZ; | |
3200 | spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags); | |
3201 | } | |
3202 | ||
3203 | if (dropped_lock) | |
3204 | continue; | |
3205 | ||
3206 | /* Nothing to do for 'timeout' */ | |
3207 | set_current_state(TASK_INTERRUPTIBLE); | |
3208 | add_wait_queue(&kiblnd_data.kib_connd_waitq, &wait); | |
3209 | spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags); | |
3210 | ||
3211 | waitq_timedwait(&wait, TASK_INTERRUPTIBLE, timeout); | |
3212 | ||
3213 | set_current_state(TASK_RUNNING); | |
3214 | remove_wait_queue(&kiblnd_data.kib_connd_waitq, &wait); | |
3215 | spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags); | |
3216 | } | |
3217 | ||
3218 | spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags); | |
3219 | ||
3220 | kiblnd_thread_fini(); | |
3221 | return 0; | |
3222 | } | |
3223 | ||
3224 | void | |
3225 | kiblnd_qp_event(struct ib_event *event, void *arg) | |
3226 | { | |
3227 | kib_conn_t *conn = arg; | |
3228 | ||
3229 | switch (event->event) { | |
3230 | case IB_EVENT_COMM_EST: | |
3231 | CDEBUG(D_NET, "%s established\n", | |
3232 | libcfs_nid2str(conn->ibc_peer->ibp_nid)); | |
3233 | return; | |
3234 | ||
3235 | default: | |
3236 | CERROR("%s: Async QP event type %d\n", | |
3237 | libcfs_nid2str(conn->ibc_peer->ibp_nid), event->event); | |
3238 | return; | |
3239 | } | |
3240 | } | |
3241 | ||
3242 | void | |
3243 | kiblnd_complete (struct ib_wc *wc) | |
3244 | { | |
3245 | switch (kiblnd_wreqid2type(wc->wr_id)) { | |
3246 | default: | |
3247 | LBUG(); | |
3248 | ||
3249 | case IBLND_WID_RDMA: | |
3250 | /* We only get RDMA completion notification if it fails. All | |
3251 | * subsequent work items, including the final SEND will fail | |
3252 | * too. However we can't print out any more info about the | |
3253 | * failing RDMA because 'tx' might be back on the idle list or | |
3254 | * even reused already if we didn't manage to post all our work | |
3255 | * items */ | |
3256 | CNETERR("RDMA (tx: %p) failed: %d\n", | |
3257 | kiblnd_wreqid2ptr(wc->wr_id), wc->status); | |
3258 | return; | |
3259 | ||
3260 | case IBLND_WID_TX: | |
3261 | kiblnd_tx_complete(kiblnd_wreqid2ptr(wc->wr_id), wc->status); | |
3262 | return; | |
3263 | ||
3264 | case IBLND_WID_RX: | |
3265 | kiblnd_rx_complete(kiblnd_wreqid2ptr(wc->wr_id), wc->status, | |
3266 | wc->byte_len); | |
3267 | return; | |
3268 | } | |
3269 | } | |
3270 | ||
3271 | void | |
3272 | kiblnd_cq_completion(struct ib_cq *cq, void *arg) | |
3273 | { | |
3274 | /* NB I'm not allowed to schedule this conn once its refcount has | |
3275 | * reached 0. Since fundamentally I'm racing with scheduler threads | |
3276 | * consuming my CQ I could be called after all completions have | |
3277 | * occurred. But in this case, ibc_nrx == 0 && ibc_nsends_posted == 0 | |
3278 | * and this CQ is about to be destroyed so I NOOP. */ | |
3279 | kib_conn_t *conn = (kib_conn_t *)arg; | |
3280 | struct kib_sched_info *sched = conn->ibc_sched; | |
3281 | unsigned long flags; | |
3282 | ||
3283 | LASSERT(cq == conn->ibc_cq); | |
3284 | ||
3285 | spin_lock_irqsave(&sched->ibs_lock, flags); | |
3286 | ||
3287 | conn->ibc_ready = 1; | |
3288 | ||
3289 | if (!conn->ibc_scheduled && | |
3290 | (conn->ibc_nrx > 0 || | |
3291 | conn->ibc_nsends_posted > 0)) { | |
3292 | kiblnd_conn_addref(conn); /* +1 ref for sched_conns */ | |
3293 | conn->ibc_scheduled = 1; | |
3294 | list_add_tail(&conn->ibc_sched_list, &sched->ibs_conns); | |
3295 | ||
3296 | if (waitqueue_active(&sched->ibs_waitq)) | |
3297 | wake_up(&sched->ibs_waitq); | |
3298 | } | |
3299 | ||
3300 | spin_unlock_irqrestore(&sched->ibs_lock, flags); | |
3301 | } | |
3302 | ||
3303 | void | |
3304 | kiblnd_cq_event(struct ib_event *event, void *arg) | |
3305 | { | |
3306 | kib_conn_t *conn = arg; | |
3307 | ||
3308 | CERROR("%s: async CQ event type %d\n", | |
3309 | libcfs_nid2str(conn->ibc_peer->ibp_nid), event->event); | |
3310 | } | |
3311 | ||
3312 | int | |
3313 | kiblnd_scheduler(void *arg) | |
3314 | { | |
3315 | long id = (long)arg; | |
3316 | struct kib_sched_info *sched; | |
3317 | kib_conn_t *conn; | |
3318 | wait_queue_t wait; | |
3319 | unsigned long flags; | |
3320 | struct ib_wc wc; | |
3321 | int did_something; | |
3322 | int busy_loops = 0; | |
3323 | int rc; | |
3324 | ||
3325 | cfs_block_allsigs(); | |
3326 | ||
3327 | init_waitqueue_entry_current(&wait); | |
3328 | ||
3329 | sched = kiblnd_data.kib_scheds[KIB_THREAD_CPT(id)]; | |
3330 | ||
3331 | rc = cfs_cpt_bind(lnet_cpt_table(), sched->ibs_cpt); | |
3332 | if (rc != 0) { | |
3333 | CWARN("Failed to bind on CPT %d, please verify whether " | |
3334 | "all CPUs are healthy and reload modules if necessary, " | |
3335 | "otherwise your system might under risk of low " | |
3336 | "performance\n", sched->ibs_cpt); | |
3337 | } | |
3338 | ||
3339 | spin_lock_irqsave(&sched->ibs_lock, flags); | |
3340 | ||
3341 | while (!kiblnd_data.kib_shutdown) { | |
3342 | if (busy_loops++ >= IBLND_RESCHED) { | |
3343 | spin_unlock_irqrestore(&sched->ibs_lock, flags); | |
3344 | ||
3345 | cond_resched(); | |
3346 | busy_loops = 0; | |
3347 | ||
3348 | spin_lock_irqsave(&sched->ibs_lock, flags); | |
3349 | } | |
3350 | ||
3351 | did_something = 0; | |
3352 | ||
3353 | if (!list_empty(&sched->ibs_conns)) { | |
3354 | conn = list_entry(sched->ibs_conns.next, | |
3355 | kib_conn_t, ibc_sched_list); | |
3356 | /* take over kib_sched_conns' ref on conn... */ | |
3357 | LASSERT(conn->ibc_scheduled); | |
3358 | list_del(&conn->ibc_sched_list); | |
3359 | conn->ibc_ready = 0; | |
3360 | ||
3361 | spin_unlock_irqrestore(&sched->ibs_lock, flags); | |
3362 | ||
3363 | rc = ib_poll_cq(conn->ibc_cq, 1, &wc); | |
3364 | if (rc == 0) { | |
3365 | rc = ib_req_notify_cq(conn->ibc_cq, | |
3366 | IB_CQ_NEXT_COMP); | |
3367 | if (rc < 0) { | |
3368 | CWARN("%s: ib_req_notify_cq failed: %d, " | |
3369 | "closing connection\n", | |
3370 | libcfs_nid2str(conn->ibc_peer->ibp_nid), rc); | |
3371 | kiblnd_close_conn(conn, -EIO); | |
3372 | kiblnd_conn_decref(conn); | |
3373 | spin_lock_irqsave(&sched->ibs_lock, | |
3374 | flags); | |
3375 | continue; | |
3376 | } | |
3377 | ||
3378 | rc = ib_poll_cq(conn->ibc_cq, 1, &wc); | |
3379 | } | |
3380 | ||
3381 | if (rc < 0) { | |
3382 | CWARN("%s: ib_poll_cq failed: %d, " | |
3383 | "closing connection\n", | |
3384 | libcfs_nid2str(conn->ibc_peer->ibp_nid), | |
3385 | rc); | |
3386 | kiblnd_close_conn(conn, -EIO); | |
3387 | kiblnd_conn_decref(conn); | |
3388 | spin_lock_irqsave(&sched->ibs_lock, flags); | |
3389 | continue; | |
3390 | } | |
3391 | ||
3392 | spin_lock_irqsave(&sched->ibs_lock, flags); | |
3393 | ||
3394 | if (rc != 0 || conn->ibc_ready) { | |
3395 | /* There may be another completion waiting; get | |
3396 | * another scheduler to check while I handle | |
3397 | * this one... */ | |
3398 | /* +1 ref for sched_conns */ | |
3399 | kiblnd_conn_addref(conn); | |
3400 | list_add_tail(&conn->ibc_sched_list, | |
3401 | &sched->ibs_conns); | |
3402 | if (waitqueue_active(&sched->ibs_waitq)) | |
3403 | wake_up(&sched->ibs_waitq); | |
3404 | } else { | |
3405 | conn->ibc_scheduled = 0; | |
3406 | } | |
3407 | ||
3408 | if (rc != 0) { | |
3409 | spin_unlock_irqrestore(&sched->ibs_lock, flags); | |
3410 | kiblnd_complete(&wc); | |
3411 | ||
3412 | spin_lock_irqsave(&sched->ibs_lock, flags); | |
3413 | } | |
3414 | ||
3415 | kiblnd_conn_decref(conn); /* ...drop my ref from above */ | |
3416 | did_something = 1; | |
3417 | } | |
3418 | ||
3419 | if (did_something) | |
3420 | continue; | |
3421 | ||
3422 | set_current_state(TASK_INTERRUPTIBLE); | |
3423 | add_wait_queue_exclusive(&sched->ibs_waitq, &wait); | |
3424 | spin_unlock_irqrestore(&sched->ibs_lock, flags); | |
3425 | ||
3426 | waitq_wait(&wait, TASK_INTERRUPTIBLE); | |
3427 | busy_loops = 0; | |
3428 | ||
3429 | remove_wait_queue(&sched->ibs_waitq, &wait); | |
3430 | set_current_state(TASK_RUNNING); | |
3431 | spin_lock_irqsave(&sched->ibs_lock, flags); | |
3432 | } | |
3433 | ||
3434 | spin_unlock_irqrestore(&sched->ibs_lock, flags); | |
3435 | ||
3436 | kiblnd_thread_fini(); | |
3437 | return 0; | |
3438 | } | |
3439 | ||
3440 | int | |
3441 | kiblnd_failover_thread(void *arg) | |
3442 | { | |
3443 | rwlock_t *glock = &kiblnd_data.kib_global_lock; | |
3444 | kib_dev_t *dev; | |
3445 | wait_queue_t wait; | |
3446 | unsigned long flags; | |
3447 | int rc; | |
3448 | ||
3449 | LASSERT (*kiblnd_tunables.kib_dev_failover != 0); | |
3450 | ||
3451 | cfs_block_allsigs (); | |
3452 | ||
3453 | init_waitqueue_entry_current(&wait); | |
3454 | write_lock_irqsave(glock, flags); | |
3455 | ||
3456 | while (!kiblnd_data.kib_shutdown) { | |
3457 | int do_failover = 0; | |
3458 | int long_sleep; | |
3459 | ||
3460 | list_for_each_entry(dev, &kiblnd_data.kib_failed_devs, | |
3461 | ibd_fail_list) { | |
3462 | if (cfs_time_before(cfs_time_current(), | |
3463 | dev->ibd_next_failover)) | |
3464 | continue; | |
3465 | do_failover = 1; | |
3466 | break; | |
3467 | } | |
3468 | ||
3469 | if (do_failover) { | |
3470 | list_del_init(&dev->ibd_fail_list); | |
3471 | dev->ibd_failover = 1; | |
3472 | write_unlock_irqrestore(glock, flags); | |
3473 | ||
3474 | rc = kiblnd_dev_failover(dev); | |
3475 | ||
3476 | write_lock_irqsave(glock, flags); | |
3477 | ||
3478 | LASSERT (dev->ibd_failover); | |
3479 | dev->ibd_failover = 0; | |
3480 | if (rc >= 0) { /* Device is OK or failover succeed */ | |
3481 | dev->ibd_next_failover = cfs_time_shift(3); | |
3482 | continue; | |
3483 | } | |
3484 | ||
3485 | /* failed to failover, retry later */ | |
3486 | dev->ibd_next_failover = | |
3487 | cfs_time_shift(min(dev->ibd_failed_failover, 10)); | |
3488 | if (kiblnd_dev_can_failover(dev)) { | |
3489 | list_add_tail(&dev->ibd_fail_list, | |
3490 | &kiblnd_data.kib_failed_devs); | |
3491 | } | |
3492 | ||
3493 | continue; | |
3494 | } | |
3495 | ||
3496 | /* long sleep if no more pending failover */ | |
3497 | long_sleep = list_empty(&kiblnd_data.kib_failed_devs); | |
3498 | ||
3499 | set_current_state(TASK_INTERRUPTIBLE); | |
3500 | add_wait_queue(&kiblnd_data.kib_failover_waitq, &wait); | |
3501 | write_unlock_irqrestore(glock, flags); | |
3502 | ||
3503 | rc = schedule_timeout(long_sleep ? cfs_time_seconds(10) : | |
3504 | cfs_time_seconds(1)); | |
3505 | set_current_state(TASK_RUNNING); | |
3506 | remove_wait_queue(&kiblnd_data.kib_failover_waitq, &wait); | |
3507 | write_lock_irqsave(glock, flags); | |
3508 | ||
3509 | if (!long_sleep || rc != 0) | |
3510 | continue; | |
3511 | ||
3512 | /* have a long sleep, routine check all active devices, | |
3513 | * we need checking like this because if there is not active | |
3514 | * connection on the dev and no SEND from local, we may listen | |
3515 | * on wrong HCA for ever while there is a bonding failover */ | |
3516 | list_for_each_entry(dev, &kiblnd_data.kib_devs, ibd_list) { | |
3517 | if (kiblnd_dev_can_failover(dev)) { | |
3518 | list_add_tail(&dev->ibd_fail_list, | |
3519 | &kiblnd_data.kib_failed_devs); | |
3520 | } | |
3521 | } | |
3522 | } | |
3523 | ||
3524 | write_unlock_irqrestore(glock, flags); | |
3525 | ||
3526 | kiblnd_thread_fini(); | |
3527 | return 0; | |
3528 | } |