Commit | Line | Data |
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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) 2003, 2010, Oracle and/or its affiliates. All rights reserved. | |
28 | * Use is subject to license terms. | |
29 | * | |
30 | * Copyright (c) 2011, 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/socklnd/socklnd.c | |
37 | * | |
38 | * Author: Zach Brown <zab@zabbo.net> | |
39 | * Author: Peter J. Braam <braam@clusterfs.com> | |
40 | * Author: Phil Schwan <phil@clusterfs.com> | |
41 | * Author: Eric Barton <eric@bartonsoftware.com> | |
42 | */ | |
43 | ||
44 | #include "socklnd.h" | |
45 | ||
0b913529 JS |
46 | static lnd_t the_ksocklnd; |
47 | ksock_nal_data_t ksocknal_data; | |
d7e09d03 | 48 | |
0b913529 | 49 | static ksock_interface_t * |
d7e09d03 PT |
50 | ksocknal_ip2iface(lnet_ni_t *ni, __u32 ip) |
51 | { | |
52 | ksock_net_t *net = ni->ni_data; | |
53 | int i; | |
54 | ksock_interface_t *iface; | |
55 | ||
56 | for (i = 0; i < net->ksnn_ninterfaces; i++) { | |
57 | LASSERT(i < LNET_MAX_INTERFACES); | |
58 | iface = &net->ksnn_interfaces[i]; | |
59 | ||
60 | if (iface->ksni_ipaddr == ip) | |
a1f659d4 | 61 | return iface; |
d7e09d03 PT |
62 | } |
63 | ||
a1f659d4 | 64 | return NULL; |
d7e09d03 PT |
65 | } |
66 | ||
0b913529 | 67 | static ksock_route_t * |
d7e09d03 PT |
68 | ksocknal_create_route (__u32 ipaddr, int port) |
69 | { | |
70 | ksock_route_t *route; | |
71 | ||
72 | LIBCFS_ALLOC (route, sizeof (*route)); | |
73 | if (route == NULL) | |
a1f659d4 | 74 | return NULL; |
d7e09d03 PT |
75 | |
76 | atomic_set (&route->ksnr_refcount, 1); | |
77 | route->ksnr_peer = NULL; | |
78 | route->ksnr_retry_interval = 0; /* OK to connect at any time */ | |
79 | route->ksnr_ipaddr = ipaddr; | |
80 | route->ksnr_port = port; | |
81 | route->ksnr_scheduled = 0; | |
82 | route->ksnr_connecting = 0; | |
83 | route->ksnr_connected = 0; | |
84 | route->ksnr_deleted = 0; | |
85 | route->ksnr_conn_count = 0; | |
86 | route->ksnr_share_count = 0; | |
87 | ||
a1f659d4 | 88 | return route; |
d7e09d03 PT |
89 | } |
90 | ||
91 | void | |
92 | ksocknal_destroy_route (ksock_route_t *route) | |
93 | { | |
94 | LASSERT (atomic_read(&route->ksnr_refcount) == 0); | |
95 | ||
96 | if (route->ksnr_peer != NULL) | |
97 | ksocknal_peer_decref(route->ksnr_peer); | |
98 | ||
99 | LIBCFS_FREE (route, sizeof (*route)); | |
100 | } | |
101 | ||
0b913529 | 102 | static int |
d7e09d03 PT |
103 | ksocknal_create_peer (ksock_peer_t **peerp, lnet_ni_t *ni, lnet_process_id_t id) |
104 | { | |
105 | ksock_net_t *net = ni->ni_data; | |
106 | ksock_peer_t *peer; | |
107 | ||
108 | LASSERT (id.nid != LNET_NID_ANY); | |
109 | LASSERT (id.pid != LNET_PID_ANY); | |
110 | LASSERT (!in_interrupt()); | |
111 | ||
112 | LIBCFS_ALLOC (peer, sizeof (*peer)); | |
113 | if (peer == NULL) | |
114 | return -ENOMEM; | |
115 | ||
d7e09d03 PT |
116 | peer->ksnp_ni = ni; |
117 | peer->ksnp_id = id; | |
118 | atomic_set (&peer->ksnp_refcount, 1); /* 1 ref for caller */ | |
119 | peer->ksnp_closing = 0; | |
120 | peer->ksnp_accepting = 0; | |
121 | peer->ksnp_proto = NULL; | |
122 | peer->ksnp_last_alive = 0; | |
123 | peer->ksnp_zc_next_cookie = SOCKNAL_KEEPALIVE_PING + 1; | |
124 | ||
125 | INIT_LIST_HEAD (&peer->ksnp_conns); | |
126 | INIT_LIST_HEAD (&peer->ksnp_routes); | |
127 | INIT_LIST_HEAD (&peer->ksnp_tx_queue); | |
128 | INIT_LIST_HEAD (&peer->ksnp_zc_req_list); | |
129 | spin_lock_init(&peer->ksnp_lock); | |
130 | ||
131 | spin_lock_bh(&net->ksnn_lock); | |
132 | ||
133 | if (net->ksnn_shutdown) { | |
134 | spin_unlock_bh(&net->ksnn_lock); | |
135 | ||
136 | LIBCFS_FREE(peer, sizeof(*peer)); | |
137 | CERROR("Can't create peer: network shutdown\n"); | |
138 | return -ESHUTDOWN; | |
139 | } | |
140 | ||
141 | net->ksnn_npeers++; | |
142 | ||
143 | spin_unlock_bh(&net->ksnn_lock); | |
144 | ||
145 | *peerp = peer; | |
146 | return 0; | |
147 | } | |
148 | ||
149 | void | |
150 | ksocknal_destroy_peer (ksock_peer_t *peer) | |
151 | { | |
152 | ksock_net_t *net = peer->ksnp_ni->ni_data; | |
153 | ||
154 | CDEBUG (D_NET, "peer %s %p deleted\n", | |
155 | libcfs_id2str(peer->ksnp_id), peer); | |
156 | ||
157 | LASSERT (atomic_read (&peer->ksnp_refcount) == 0); | |
158 | LASSERT (peer->ksnp_accepting == 0); | |
159 | LASSERT (list_empty (&peer->ksnp_conns)); | |
160 | LASSERT (list_empty (&peer->ksnp_routes)); | |
161 | LASSERT (list_empty (&peer->ksnp_tx_queue)); | |
162 | LASSERT (list_empty (&peer->ksnp_zc_req_list)); | |
163 | ||
164 | LIBCFS_FREE (peer, sizeof (*peer)); | |
165 | ||
166 | /* NB a peer's connections and routes keep a reference on their peer | |
167 | * until they are destroyed, so we can be assured that _all_ state to | |
168 | * do with this peer has been cleaned up when its refcount drops to | |
169 | * zero. */ | |
170 | spin_lock_bh(&net->ksnn_lock); | |
171 | net->ksnn_npeers--; | |
172 | spin_unlock_bh(&net->ksnn_lock); | |
173 | } | |
174 | ||
175 | ksock_peer_t * | |
176 | ksocknal_find_peer_locked (lnet_ni_t *ni, lnet_process_id_t id) | |
177 | { | |
178 | struct list_head *peer_list = ksocknal_nid2peerlist(id.nid); | |
179 | struct list_head *tmp; | |
180 | ksock_peer_t *peer; | |
181 | ||
182 | list_for_each (tmp, peer_list) { | |
183 | ||
184 | peer = list_entry (tmp, ksock_peer_t, ksnp_list); | |
185 | ||
186 | LASSERT (!peer->ksnp_closing); | |
187 | ||
188 | if (peer->ksnp_ni != ni) | |
189 | continue; | |
190 | ||
191 | if (peer->ksnp_id.nid != id.nid || | |
192 | peer->ksnp_id.pid != id.pid) | |
193 | continue; | |
194 | ||
195 | CDEBUG(D_NET, "got peer [%p] -> %s (%d)\n", | |
196 | peer, libcfs_id2str(id), | |
197 | atomic_read(&peer->ksnp_refcount)); | |
a1f659d4 | 198 | return peer; |
d7e09d03 | 199 | } |
a1f659d4 | 200 | return NULL; |
d7e09d03 PT |
201 | } |
202 | ||
203 | ksock_peer_t * | |
204 | ksocknal_find_peer (lnet_ni_t *ni, lnet_process_id_t id) | |
205 | { | |
206 | ksock_peer_t *peer; | |
207 | ||
208 | read_lock(&ksocknal_data.ksnd_global_lock); | |
209 | peer = ksocknal_find_peer_locked(ni, id); | |
210 | if (peer != NULL) /* +1 ref for caller? */ | |
211 | ksocknal_peer_addref(peer); | |
212 | read_unlock(&ksocknal_data.ksnd_global_lock); | |
213 | ||
a1f659d4 | 214 | return peer; |
d7e09d03 PT |
215 | } |
216 | ||
0b913529 | 217 | static void |
d7e09d03 PT |
218 | ksocknal_unlink_peer_locked (ksock_peer_t *peer) |
219 | { | |
220 | int i; | |
221 | __u32 ip; | |
222 | ksock_interface_t *iface; | |
223 | ||
224 | for (i = 0; i < peer->ksnp_n_passive_ips; i++) { | |
225 | LASSERT (i < LNET_MAX_INTERFACES); | |
226 | ip = peer->ksnp_passive_ips[i]; | |
227 | ||
228 | iface = ksocknal_ip2iface(peer->ksnp_ni, ip); | |
229 | /* All IPs in peer->ksnp_passive_ips[] come from the | |
230 | * interface list, therefore the call must succeed. */ | |
231 | LASSERT (iface != NULL); | |
232 | ||
233 | CDEBUG(D_NET, "peer=%p iface=%p ksni_nroutes=%d\n", | |
234 | peer, iface, iface->ksni_nroutes); | |
235 | iface->ksni_npeers--; | |
236 | } | |
237 | ||
238 | LASSERT (list_empty(&peer->ksnp_conns)); | |
239 | LASSERT (list_empty(&peer->ksnp_routes)); | |
240 | LASSERT (!peer->ksnp_closing); | |
241 | peer->ksnp_closing = 1; | |
242 | list_del (&peer->ksnp_list); | |
243 | /* lose peerlist's ref */ | |
244 | ksocknal_peer_decref(peer); | |
245 | } | |
246 | ||
0b913529 | 247 | static int |
d7e09d03 PT |
248 | ksocknal_get_peer_info (lnet_ni_t *ni, int index, |
249 | lnet_process_id_t *id, __u32 *myip, __u32 *peer_ip, | |
250 | int *port, int *conn_count, int *share_count) | |
251 | { | |
252 | ksock_peer_t *peer; | |
253 | struct list_head *ptmp; | |
254 | ksock_route_t *route; | |
255 | struct list_head *rtmp; | |
256 | int i; | |
257 | int j; | |
258 | int rc = -ENOENT; | |
259 | ||
260 | read_lock(&ksocknal_data.ksnd_global_lock); | |
261 | ||
262 | for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) { | |
263 | ||
264 | list_for_each (ptmp, &ksocknal_data.ksnd_peers[i]) { | |
265 | peer = list_entry (ptmp, ksock_peer_t, ksnp_list); | |
266 | ||
267 | if (peer->ksnp_ni != ni) | |
268 | continue; | |
269 | ||
270 | if (peer->ksnp_n_passive_ips == 0 && | |
271 | list_empty(&peer->ksnp_routes)) { | |
272 | if (index-- > 0) | |
273 | continue; | |
274 | ||
275 | *id = peer->ksnp_id; | |
276 | *myip = 0; | |
277 | *peer_ip = 0; | |
278 | *port = 0; | |
279 | *conn_count = 0; | |
280 | *share_count = 0; | |
281 | rc = 0; | |
282 | goto out; | |
283 | } | |
284 | ||
285 | for (j = 0; j < peer->ksnp_n_passive_ips; j++) { | |
286 | if (index-- > 0) | |
287 | continue; | |
288 | ||
289 | *id = peer->ksnp_id; | |
290 | *myip = peer->ksnp_passive_ips[j]; | |
291 | *peer_ip = 0; | |
292 | *port = 0; | |
293 | *conn_count = 0; | |
294 | *share_count = 0; | |
295 | rc = 0; | |
296 | goto out; | |
297 | } | |
298 | ||
299 | list_for_each (rtmp, &peer->ksnp_routes) { | |
300 | if (index-- > 0) | |
301 | continue; | |
302 | ||
303 | route = list_entry(rtmp, ksock_route_t, | |
304 | ksnr_list); | |
305 | ||
306 | *id = peer->ksnp_id; | |
307 | *myip = route->ksnr_myipaddr; | |
308 | *peer_ip = route->ksnr_ipaddr; | |
309 | *port = route->ksnr_port; | |
310 | *conn_count = route->ksnr_conn_count; | |
311 | *share_count = route->ksnr_share_count; | |
312 | rc = 0; | |
313 | goto out; | |
314 | } | |
315 | } | |
316 | } | |
317 | out: | |
318 | read_unlock(&ksocknal_data.ksnd_global_lock); | |
a1f659d4 | 319 | return rc; |
d7e09d03 PT |
320 | } |
321 | ||
0b913529 | 322 | static void |
d7e09d03 PT |
323 | ksocknal_associate_route_conn_locked(ksock_route_t *route, ksock_conn_t *conn) |
324 | { | |
325 | ksock_peer_t *peer = route->ksnr_peer; | |
326 | int type = conn->ksnc_type; | |
327 | ksock_interface_t *iface; | |
328 | ||
329 | conn->ksnc_route = route; | |
330 | ksocknal_route_addref(route); | |
331 | ||
332 | if (route->ksnr_myipaddr != conn->ksnc_myipaddr) { | |
333 | if (route->ksnr_myipaddr == 0) { | |
334 | /* route wasn't bound locally yet (the initial route) */ | |
5e8f6920 | 335 | CDEBUG(D_NET, "Binding %s %pI4h to %pI4h\n", |
d7e09d03 | 336 | libcfs_id2str(peer->ksnp_id), |
5e8f6920 PT |
337 | &route->ksnr_ipaddr, |
338 | &conn->ksnc_myipaddr); | |
d7e09d03 | 339 | } else { |
5e8f6920 PT |
340 | CDEBUG(D_NET, "Rebinding %s %pI4h from " |
341 | "%pI4h to %pI4h\n", | |
d7e09d03 | 342 | libcfs_id2str(peer->ksnp_id), |
5e8f6920 PT |
343 | &route->ksnr_ipaddr, |
344 | &route->ksnr_myipaddr, | |
345 | &conn->ksnc_myipaddr); | |
d7e09d03 PT |
346 | |
347 | iface = ksocknal_ip2iface(route->ksnr_peer->ksnp_ni, | |
348 | route->ksnr_myipaddr); | |
349 | if (iface != NULL) | |
350 | iface->ksni_nroutes--; | |
351 | } | |
352 | route->ksnr_myipaddr = conn->ksnc_myipaddr; | |
353 | iface = ksocknal_ip2iface(route->ksnr_peer->ksnp_ni, | |
354 | route->ksnr_myipaddr); | |
355 | if (iface != NULL) | |
356 | iface->ksni_nroutes++; | |
357 | } | |
358 | ||
359 | route->ksnr_connected |= (1<<type); | |
360 | route->ksnr_conn_count++; | |
361 | ||
362 | /* Successful connection => further attempts can | |
363 | * proceed immediately */ | |
364 | route->ksnr_retry_interval = 0; | |
365 | } | |
366 | ||
0b913529 | 367 | static void |
d7e09d03 PT |
368 | ksocknal_add_route_locked (ksock_peer_t *peer, ksock_route_t *route) |
369 | { | |
370 | struct list_head *tmp; | |
371 | ksock_conn_t *conn; | |
372 | ksock_route_t *route2; | |
373 | ||
374 | LASSERT (!peer->ksnp_closing); | |
375 | LASSERT (route->ksnr_peer == NULL); | |
376 | LASSERT (!route->ksnr_scheduled); | |
377 | LASSERT (!route->ksnr_connecting); | |
378 | LASSERT (route->ksnr_connected == 0); | |
379 | ||
380 | /* LASSERT(unique) */ | |
381 | list_for_each(tmp, &peer->ksnp_routes) { | |
382 | route2 = list_entry(tmp, ksock_route_t, ksnr_list); | |
383 | ||
384 | if (route2->ksnr_ipaddr == route->ksnr_ipaddr) { | |
5e8f6920 | 385 | CERROR("Duplicate route %s %pI4h\n", |
d7e09d03 | 386 | libcfs_id2str(peer->ksnp_id), |
5e8f6920 | 387 | &route->ksnr_ipaddr); |
d7e09d03 PT |
388 | LBUG(); |
389 | } | |
390 | } | |
391 | ||
392 | route->ksnr_peer = peer; | |
393 | ksocknal_peer_addref(peer); | |
394 | /* peer's routelist takes over my ref on 'route' */ | |
395 | list_add_tail(&route->ksnr_list, &peer->ksnp_routes); | |
396 | ||
397 | list_for_each(tmp, &peer->ksnp_conns) { | |
398 | conn = list_entry(tmp, ksock_conn_t, ksnc_list); | |
399 | ||
400 | if (conn->ksnc_ipaddr != route->ksnr_ipaddr) | |
401 | continue; | |
402 | ||
403 | ksocknal_associate_route_conn_locked(route, conn); | |
404 | /* keep going (typed routes) */ | |
405 | } | |
406 | } | |
407 | ||
0b913529 | 408 | static void |
d7e09d03 PT |
409 | ksocknal_del_route_locked (ksock_route_t *route) |
410 | { | |
411 | ksock_peer_t *peer = route->ksnr_peer; | |
412 | ksock_interface_t *iface; | |
413 | ksock_conn_t *conn; | |
414 | struct list_head *ctmp; | |
415 | struct list_head *cnxt; | |
416 | ||
417 | LASSERT (!route->ksnr_deleted); | |
418 | ||
419 | /* Close associated conns */ | |
420 | list_for_each_safe (ctmp, cnxt, &peer->ksnp_conns) { | |
421 | conn = list_entry(ctmp, ksock_conn_t, ksnc_list); | |
422 | ||
423 | if (conn->ksnc_route != route) | |
424 | continue; | |
425 | ||
426 | ksocknal_close_conn_locked (conn, 0); | |
427 | } | |
428 | ||
429 | if (route->ksnr_myipaddr != 0) { | |
430 | iface = ksocknal_ip2iface(route->ksnr_peer->ksnp_ni, | |
431 | route->ksnr_myipaddr); | |
432 | if (iface != NULL) | |
433 | iface->ksni_nroutes--; | |
434 | } | |
435 | ||
436 | route->ksnr_deleted = 1; | |
437 | list_del (&route->ksnr_list); | |
438 | ksocknal_route_decref(route); /* drop peer's ref */ | |
439 | ||
440 | if (list_empty (&peer->ksnp_routes) && | |
441 | list_empty (&peer->ksnp_conns)) { | |
442 | /* I've just removed the last route to a peer with no active | |
443 | * connections */ | |
444 | ksocknal_unlink_peer_locked (peer); | |
445 | } | |
446 | } | |
447 | ||
448 | int | |
449 | ksocknal_add_peer (lnet_ni_t *ni, lnet_process_id_t id, __u32 ipaddr, int port) | |
450 | { | |
451 | struct list_head *tmp; | |
452 | ksock_peer_t *peer; | |
453 | ksock_peer_t *peer2; | |
454 | ksock_route_t *route; | |
455 | ksock_route_t *route2; | |
456 | int rc; | |
457 | ||
458 | if (id.nid == LNET_NID_ANY || | |
459 | id.pid == LNET_PID_ANY) | |
71397095 | 460 | return -EINVAL; |
d7e09d03 PT |
461 | |
462 | /* Have a brand new peer ready... */ | |
463 | rc = ksocknal_create_peer(&peer, ni, id); | |
464 | if (rc != 0) | |
465 | return rc; | |
466 | ||
467 | route = ksocknal_create_route (ipaddr, port); | |
468 | if (route == NULL) { | |
469 | ksocknal_peer_decref(peer); | |
71397095 | 470 | return -ENOMEM; |
d7e09d03 PT |
471 | } |
472 | ||
473 | write_lock_bh(&ksocknal_data.ksnd_global_lock); | |
474 | ||
475 | /* always called with a ref on ni, so shutdown can't have started */ | |
476 | LASSERT (((ksock_net_t *) ni->ni_data)->ksnn_shutdown == 0); | |
477 | ||
478 | peer2 = ksocknal_find_peer_locked (ni, id); | |
479 | if (peer2 != NULL) { | |
480 | ksocknal_peer_decref(peer); | |
481 | peer = peer2; | |
482 | } else { | |
483 | /* peer table takes my ref on peer */ | |
484 | list_add_tail (&peer->ksnp_list, | |
485 | ksocknal_nid2peerlist (id.nid)); | |
486 | } | |
487 | ||
488 | route2 = NULL; | |
489 | list_for_each (tmp, &peer->ksnp_routes) { | |
490 | route2 = list_entry(tmp, ksock_route_t, ksnr_list); | |
491 | ||
492 | if (route2->ksnr_ipaddr == ipaddr) | |
493 | break; | |
494 | ||
495 | route2 = NULL; | |
496 | } | |
497 | if (route2 == NULL) { | |
498 | ksocknal_add_route_locked(peer, route); | |
499 | route->ksnr_share_count++; | |
500 | } else { | |
501 | ksocknal_route_decref(route); | |
502 | route2->ksnr_share_count++; | |
503 | } | |
504 | ||
505 | write_unlock_bh(&ksocknal_data.ksnd_global_lock); | |
506 | ||
a1f659d4 | 507 | return 0; |
d7e09d03 PT |
508 | } |
509 | ||
0b913529 | 510 | static void |
d7e09d03 PT |
511 | ksocknal_del_peer_locked (ksock_peer_t *peer, __u32 ip) |
512 | { | |
513 | ksock_conn_t *conn; | |
514 | ksock_route_t *route; | |
515 | struct list_head *tmp; | |
516 | struct list_head *nxt; | |
517 | int nshared; | |
518 | ||
519 | LASSERT (!peer->ksnp_closing); | |
520 | ||
521 | /* Extra ref prevents peer disappearing until I'm done with it */ | |
522 | ksocknal_peer_addref(peer); | |
523 | ||
524 | list_for_each_safe (tmp, nxt, &peer->ksnp_routes) { | |
525 | route = list_entry(tmp, ksock_route_t, ksnr_list); | |
526 | ||
527 | /* no match */ | |
528 | if (!(ip == 0 || route->ksnr_ipaddr == ip)) | |
529 | continue; | |
530 | ||
531 | route->ksnr_share_count = 0; | |
532 | /* This deletes associated conns too */ | |
533 | ksocknal_del_route_locked (route); | |
534 | } | |
535 | ||
536 | nshared = 0; | |
537 | list_for_each_safe (tmp, nxt, &peer->ksnp_routes) { | |
538 | route = list_entry(tmp, ksock_route_t, ksnr_list); | |
539 | nshared += route->ksnr_share_count; | |
540 | } | |
541 | ||
542 | if (nshared == 0) { | |
543 | /* remove everything else if there are no explicit entries | |
544 | * left */ | |
545 | ||
546 | list_for_each_safe (tmp, nxt, &peer->ksnp_routes) { | |
547 | route = list_entry(tmp, ksock_route_t, ksnr_list); | |
548 | ||
549 | /* we should only be removing auto-entries */ | |
550 | LASSERT(route->ksnr_share_count == 0); | |
551 | ksocknal_del_route_locked (route); | |
552 | } | |
553 | ||
554 | list_for_each_safe (tmp, nxt, &peer->ksnp_conns) { | |
555 | conn = list_entry(tmp, ksock_conn_t, ksnc_list); | |
556 | ||
557 | ksocknal_close_conn_locked(conn, 0); | |
558 | } | |
559 | } | |
560 | ||
561 | ksocknal_peer_decref(peer); | |
562 | /* NB peer unlinks itself when last conn/route is removed */ | |
563 | } | |
564 | ||
0b913529 | 565 | static int |
d7e09d03 PT |
566 | ksocknal_del_peer (lnet_ni_t *ni, lnet_process_id_t id, __u32 ip) |
567 | { | |
568 | LIST_HEAD (zombies); | |
569 | struct list_head *ptmp; | |
570 | struct list_head *pnxt; | |
571 | ksock_peer_t *peer; | |
572 | int lo; | |
573 | int hi; | |
574 | int i; | |
575 | int rc = -ENOENT; | |
576 | ||
577 | write_lock_bh(&ksocknal_data.ksnd_global_lock); | |
578 | ||
579 | if (id.nid != LNET_NID_ANY) | |
580 | lo = hi = (int)(ksocknal_nid2peerlist(id.nid) - ksocknal_data.ksnd_peers); | |
581 | else { | |
582 | lo = 0; | |
583 | hi = ksocknal_data.ksnd_peer_hash_size - 1; | |
584 | } | |
585 | ||
586 | for (i = lo; i <= hi; i++) { | |
587 | list_for_each_safe (ptmp, pnxt, | |
588 | &ksocknal_data.ksnd_peers[i]) { | |
589 | peer = list_entry (ptmp, ksock_peer_t, ksnp_list); | |
590 | ||
591 | if (peer->ksnp_ni != ni) | |
592 | continue; | |
593 | ||
594 | if (!((id.nid == LNET_NID_ANY || peer->ksnp_id.nid == id.nid) && | |
595 | (id.pid == LNET_PID_ANY || peer->ksnp_id.pid == id.pid))) | |
596 | continue; | |
597 | ||
598 | ksocknal_peer_addref(peer); /* a ref for me... */ | |
599 | ||
600 | ksocknal_del_peer_locked (peer, ip); | |
601 | ||
602 | if (peer->ksnp_closing && | |
603 | !list_empty(&peer->ksnp_tx_queue)) { | |
604 | LASSERT (list_empty(&peer->ksnp_conns)); | |
605 | LASSERT (list_empty(&peer->ksnp_routes)); | |
606 | ||
607 | list_splice_init(&peer->ksnp_tx_queue, | |
608 | &zombies); | |
609 | } | |
610 | ||
611 | ksocknal_peer_decref(peer); /* ...till here */ | |
612 | ||
613 | rc = 0; /* matched! */ | |
614 | } | |
615 | } | |
616 | ||
617 | write_unlock_bh(&ksocknal_data.ksnd_global_lock); | |
618 | ||
619 | ksocknal_txlist_done(ni, &zombies, 1); | |
620 | ||
a1f659d4 | 621 | return rc; |
d7e09d03 PT |
622 | } |
623 | ||
0b913529 | 624 | static ksock_conn_t * |
d7e09d03 PT |
625 | ksocknal_get_conn_by_idx (lnet_ni_t *ni, int index) |
626 | { | |
627 | ksock_peer_t *peer; | |
628 | struct list_head *ptmp; | |
629 | ksock_conn_t *conn; | |
630 | struct list_head *ctmp; | |
631 | int i; | |
632 | ||
633 | read_lock(&ksocknal_data.ksnd_global_lock); | |
634 | ||
635 | for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) { | |
636 | list_for_each (ptmp, &ksocknal_data.ksnd_peers[i]) { | |
637 | peer = list_entry (ptmp, ksock_peer_t, ksnp_list); | |
638 | ||
639 | LASSERT (!peer->ksnp_closing); | |
640 | ||
641 | if (peer->ksnp_ni != ni) | |
642 | continue; | |
643 | ||
644 | list_for_each (ctmp, &peer->ksnp_conns) { | |
645 | if (index-- > 0) | |
646 | continue; | |
647 | ||
648 | conn = list_entry (ctmp, ksock_conn_t, | |
649 | ksnc_list); | |
650 | ksocknal_conn_addref(conn); | |
4b18c358 | 651 | read_unlock(&ksocknal_data.ksnd_global_lock); |
a1f659d4 | 652 | return conn; |
d7e09d03 PT |
653 | } |
654 | } | |
655 | } | |
656 | ||
657 | read_unlock(&ksocknal_data.ksnd_global_lock); | |
a1f659d4 | 658 | return NULL; |
d7e09d03 PT |
659 | } |
660 | ||
0b913529 | 661 | static ksock_sched_t * |
d7e09d03 PT |
662 | ksocknal_choose_scheduler_locked(unsigned int cpt) |
663 | { | |
664 | struct ksock_sched_info *info = ksocknal_data.ksnd_sched_info[cpt]; | |
665 | ksock_sched_t *sched; | |
666 | int i; | |
667 | ||
668 | LASSERT(info->ksi_nthreads > 0); | |
669 | ||
670 | sched = &info->ksi_scheds[0]; | |
671 | /* | |
672 | * NB: it's safe so far, but info->ksi_nthreads could be changed | |
673 | * at runtime when we have dynamic LNet configuration, then we | |
674 | * need to take care of this. | |
675 | */ | |
676 | for (i = 1; i < info->ksi_nthreads; i++) { | |
677 | if (sched->kss_nconns > info->ksi_scheds[i].kss_nconns) | |
678 | sched = &info->ksi_scheds[i]; | |
679 | } | |
680 | ||
681 | return sched; | |
682 | } | |
683 | ||
0b913529 | 684 | static int |
d7e09d03 PT |
685 | ksocknal_local_ipvec (lnet_ni_t *ni, __u32 *ipaddrs) |
686 | { | |
687 | ksock_net_t *net = ni->ni_data; | |
688 | int i; | |
689 | int nip; | |
690 | ||
691 | read_lock(&ksocknal_data.ksnd_global_lock); | |
692 | ||
693 | nip = net->ksnn_ninterfaces; | |
694 | LASSERT (nip <= LNET_MAX_INTERFACES); | |
695 | ||
696 | /* Only offer interfaces for additional connections if I have | |
697 | * more than one. */ | |
698 | if (nip < 2) { | |
699 | read_unlock(&ksocknal_data.ksnd_global_lock); | |
700 | return 0; | |
701 | } | |
702 | ||
703 | for (i = 0; i < nip; i++) { | |
704 | ipaddrs[i] = net->ksnn_interfaces[i].ksni_ipaddr; | |
705 | LASSERT (ipaddrs[i] != 0); | |
706 | } | |
707 | ||
708 | read_unlock(&ksocknal_data.ksnd_global_lock); | |
a1f659d4 | 709 | return nip; |
d7e09d03 PT |
710 | } |
711 | ||
0b913529 | 712 | static int |
d7e09d03 PT |
713 | ksocknal_match_peerip (ksock_interface_t *iface, __u32 *ips, int nips) |
714 | { | |
715 | int best_netmatch = 0; | |
716 | int best_xor = 0; | |
717 | int best = -1; | |
718 | int this_xor; | |
719 | int this_netmatch; | |
720 | int i; | |
721 | ||
722 | for (i = 0; i < nips; i++) { | |
723 | if (ips[i] == 0) | |
724 | continue; | |
725 | ||
726 | this_xor = (ips[i] ^ iface->ksni_ipaddr); | |
727 | this_netmatch = ((this_xor & iface->ksni_netmask) == 0) ? 1 : 0; | |
728 | ||
729 | if (!(best < 0 || | |
730 | best_netmatch < this_netmatch || | |
731 | (best_netmatch == this_netmatch && | |
732 | best_xor > this_xor))) | |
733 | continue; | |
734 | ||
735 | best = i; | |
736 | best_netmatch = this_netmatch; | |
737 | best_xor = this_xor; | |
738 | } | |
739 | ||
740 | LASSERT (best >= 0); | |
a1f659d4 | 741 | return best; |
d7e09d03 PT |
742 | } |
743 | ||
0b913529 | 744 | static int |
d7e09d03 PT |
745 | ksocknal_select_ips(ksock_peer_t *peer, __u32 *peerips, int n_peerips) |
746 | { | |
747 | rwlock_t *global_lock = &ksocknal_data.ksnd_global_lock; | |
748 | ksock_net_t *net = peer->ksnp_ni->ni_data; | |
749 | ksock_interface_t *iface; | |
750 | ksock_interface_t *best_iface; | |
751 | int n_ips; | |
752 | int i; | |
753 | int j; | |
754 | int k; | |
755 | __u32 ip; | |
756 | __u32 xor; | |
757 | int this_netmatch; | |
758 | int best_netmatch; | |
759 | int best_npeers; | |
760 | ||
761 | /* CAVEAT EMPTOR: We do all our interface matching with an | |
762 | * exclusive hold of global lock at IRQ priority. We're only | |
763 | * expecting to be dealing with small numbers of interfaces, so the | |
764 | * O(n**3)-ness shouldn't matter */ | |
765 | ||
766 | /* Also note that I'm not going to return more than n_peerips | |
767 | * interfaces, even if I have more myself */ | |
768 | ||
769 | write_lock_bh(global_lock); | |
770 | ||
771 | LASSERT (n_peerips <= LNET_MAX_INTERFACES); | |
772 | LASSERT (net->ksnn_ninterfaces <= LNET_MAX_INTERFACES); | |
773 | ||
774 | /* Only match interfaces for additional connections | |
775 | * if I have > 1 interface */ | |
776 | n_ips = (net->ksnn_ninterfaces < 2) ? 0 : | |
777 | MIN(n_peerips, net->ksnn_ninterfaces); | |
778 | ||
779 | for (i = 0; peer->ksnp_n_passive_ips < n_ips; i++) { | |
780 | /* ^ yes really... */ | |
781 | ||
782 | /* If we have any new interfaces, first tick off all the | |
783 | * peer IPs that match old interfaces, then choose new | |
784 | * interfaces to match the remaining peer IPS. | |
785 | * We don't forget interfaces we've stopped using; we might | |
786 | * start using them again... */ | |
787 | ||
788 | if (i < peer->ksnp_n_passive_ips) { | |
789 | /* Old interface. */ | |
790 | ip = peer->ksnp_passive_ips[i]; | |
791 | best_iface = ksocknal_ip2iface(peer->ksnp_ni, ip); | |
792 | ||
d7e09d03 PT |
793 | } else { |
794 | /* choose a new interface */ | |
795 | LASSERT (i == peer->ksnp_n_passive_ips); | |
796 | ||
797 | best_iface = NULL; | |
798 | best_netmatch = 0; | |
799 | best_npeers = 0; | |
800 | ||
801 | for (j = 0; j < net->ksnn_ninterfaces; j++) { | |
802 | iface = &net->ksnn_interfaces[j]; | |
803 | ip = iface->ksni_ipaddr; | |
804 | ||
805 | for (k = 0; k < peer->ksnp_n_passive_ips; k++) | |
806 | if (peer->ksnp_passive_ips[k] == ip) | |
807 | break; | |
808 | ||
809 | if (k < peer->ksnp_n_passive_ips) /* using it already */ | |
810 | continue; | |
811 | ||
812 | k = ksocknal_match_peerip(iface, peerips, n_peerips); | |
813 | xor = (ip ^ peerips[k]); | |
814 | this_netmatch = ((xor & iface->ksni_netmask) == 0) ? 1 : 0; | |
815 | ||
816 | if (!(best_iface == NULL || | |
817 | best_netmatch < this_netmatch || | |
818 | (best_netmatch == this_netmatch && | |
819 | best_npeers > iface->ksni_npeers))) | |
820 | continue; | |
821 | ||
822 | best_iface = iface; | |
823 | best_netmatch = this_netmatch; | |
824 | best_npeers = iface->ksni_npeers; | |
825 | } | |
826 | ||
827 | best_iface->ksni_npeers++; | |
828 | ip = best_iface->ksni_ipaddr; | |
829 | peer->ksnp_passive_ips[i] = ip; | |
830 | peer->ksnp_n_passive_ips = i+1; | |
831 | } | |
832 | ||
d7e09d03 PT |
833 | /* mark the best matching peer IP used */ |
834 | j = ksocknal_match_peerip(best_iface, peerips, n_peerips); | |
835 | peerips[j] = 0; | |
836 | } | |
837 | ||
838 | /* Overwrite input peer IP addresses */ | |
839 | memcpy(peerips, peer->ksnp_passive_ips, n_ips * sizeof(*peerips)); | |
840 | ||
841 | write_unlock_bh(global_lock); | |
842 | ||
a1f659d4 | 843 | return n_ips; |
d7e09d03 PT |
844 | } |
845 | ||
0b913529 | 846 | static void |
d7e09d03 PT |
847 | ksocknal_create_routes(ksock_peer_t *peer, int port, |
848 | __u32 *peer_ipaddrs, int npeer_ipaddrs) | |
849 | { | |
850 | ksock_route_t *newroute = NULL; | |
851 | rwlock_t *global_lock = &ksocknal_data.ksnd_global_lock; | |
852 | lnet_ni_t *ni = peer->ksnp_ni; | |
853 | ksock_net_t *net = ni->ni_data; | |
854 | struct list_head *rtmp; | |
855 | ksock_route_t *route; | |
856 | ksock_interface_t *iface; | |
857 | ksock_interface_t *best_iface; | |
858 | int best_netmatch; | |
859 | int this_netmatch; | |
860 | int best_nroutes; | |
861 | int i; | |
862 | int j; | |
863 | ||
864 | /* CAVEAT EMPTOR: We do all our interface matching with an | |
865 | * exclusive hold of global lock at IRQ priority. We're only | |
866 | * expecting to be dealing with small numbers of interfaces, so the | |
867 | * O(n**3)-ness here shouldn't matter */ | |
868 | ||
869 | write_lock_bh(global_lock); | |
870 | ||
871 | if (net->ksnn_ninterfaces < 2) { | |
872 | /* Only create additional connections | |
873 | * if I have > 1 interface */ | |
874 | write_unlock_bh(global_lock); | |
875 | return; | |
876 | } | |
877 | ||
878 | LASSERT (npeer_ipaddrs <= LNET_MAX_INTERFACES); | |
879 | ||
880 | for (i = 0; i < npeer_ipaddrs; i++) { | |
881 | if (newroute != NULL) { | |
882 | newroute->ksnr_ipaddr = peer_ipaddrs[i]; | |
883 | } else { | |
884 | write_unlock_bh(global_lock); | |
885 | ||
886 | newroute = ksocknal_create_route(peer_ipaddrs[i], port); | |
887 | if (newroute == NULL) | |
888 | return; | |
889 | ||
890 | write_lock_bh(global_lock); | |
891 | } | |
892 | ||
893 | if (peer->ksnp_closing) { | |
894 | /* peer got closed under me */ | |
895 | break; | |
896 | } | |
897 | ||
898 | /* Already got a route? */ | |
899 | route = NULL; | |
900 | list_for_each(rtmp, &peer->ksnp_routes) { | |
901 | route = list_entry(rtmp, ksock_route_t, ksnr_list); | |
902 | ||
903 | if (route->ksnr_ipaddr == newroute->ksnr_ipaddr) | |
904 | break; | |
905 | ||
906 | route = NULL; | |
907 | } | |
908 | if (route != NULL) | |
909 | continue; | |
910 | ||
911 | best_iface = NULL; | |
912 | best_nroutes = 0; | |
913 | best_netmatch = 0; | |
914 | ||
915 | LASSERT (net->ksnn_ninterfaces <= LNET_MAX_INTERFACES); | |
916 | ||
917 | /* Select interface to connect from */ | |
918 | for (j = 0; j < net->ksnn_ninterfaces; j++) { | |
919 | iface = &net->ksnn_interfaces[j]; | |
920 | ||
921 | /* Using this interface already? */ | |
922 | list_for_each(rtmp, &peer->ksnp_routes) { | |
923 | route = list_entry(rtmp, ksock_route_t, | |
924 | ksnr_list); | |
925 | ||
926 | if (route->ksnr_myipaddr == iface->ksni_ipaddr) | |
927 | break; | |
928 | ||
929 | route = NULL; | |
930 | } | |
931 | if (route != NULL) | |
932 | continue; | |
933 | ||
934 | this_netmatch = (((iface->ksni_ipaddr ^ | |
935 | newroute->ksnr_ipaddr) & | |
936 | iface->ksni_netmask) == 0) ? 1 : 0; | |
937 | ||
938 | if (!(best_iface == NULL || | |
939 | best_netmatch < this_netmatch || | |
940 | (best_netmatch == this_netmatch && | |
941 | best_nroutes > iface->ksni_nroutes))) | |
942 | continue; | |
943 | ||
944 | best_iface = iface; | |
945 | best_netmatch = this_netmatch; | |
946 | best_nroutes = iface->ksni_nroutes; | |
947 | } | |
948 | ||
949 | if (best_iface == NULL) | |
950 | continue; | |
951 | ||
952 | newroute->ksnr_myipaddr = best_iface->ksni_ipaddr; | |
953 | best_iface->ksni_nroutes++; | |
954 | ||
955 | ksocknal_add_route_locked(peer, newroute); | |
956 | newroute = NULL; | |
957 | } | |
958 | ||
959 | write_unlock_bh(global_lock); | |
960 | if (newroute != NULL) | |
961 | ksocknal_route_decref(newroute); | |
962 | } | |
963 | ||
964 | int | |
e327dc88 | 965 | ksocknal_accept (lnet_ni_t *ni, struct socket *sock) |
d7e09d03 PT |
966 | { |
967 | ksock_connreq_t *cr; | |
968 | int rc; | |
969 | __u32 peer_ip; | |
970 | int peer_port; | |
971 | ||
972 | rc = libcfs_sock_getaddr(sock, 1, &peer_ip, &peer_port); | |
973 | LASSERT (rc == 0); /* we succeeded before */ | |
974 | ||
975 | LIBCFS_ALLOC(cr, sizeof(*cr)); | |
976 | if (cr == NULL) { | |
977 | LCONSOLE_ERROR_MSG(0x12f, "Dropping connection request from " | |
5e8f6920 PT |
978 | "%pI4h: memory exhausted\n", |
979 | &peer_ip); | |
d7e09d03 PT |
980 | return -ENOMEM; |
981 | } | |
982 | ||
983 | lnet_ni_addref(ni); | |
984 | cr->ksncr_ni = ni; | |
985 | cr->ksncr_sock = sock; | |
986 | ||
987 | spin_lock_bh(&ksocknal_data.ksnd_connd_lock); | |
988 | ||
989 | list_add_tail(&cr->ksncr_list, &ksocknal_data.ksnd_connd_connreqs); | |
990 | wake_up(&ksocknal_data.ksnd_connd_waitq); | |
991 | ||
992 | spin_unlock_bh(&ksocknal_data.ksnd_connd_lock); | |
993 | return 0; | |
994 | } | |
995 | ||
0b913529 | 996 | static int |
d7e09d03 PT |
997 | ksocknal_connecting (ksock_peer_t *peer, __u32 ipaddr) |
998 | { | |
999 | ksock_route_t *route; | |
1000 | ||
1001 | list_for_each_entry (route, &peer->ksnp_routes, ksnr_list) { | |
1002 | ||
1003 | if (route->ksnr_ipaddr == ipaddr) | |
1004 | return route->ksnr_connecting; | |
1005 | } | |
1006 | return 0; | |
1007 | } | |
1008 | ||
1009 | int | |
1010 | ksocknal_create_conn (lnet_ni_t *ni, ksock_route_t *route, | |
e327dc88 | 1011 | struct socket *sock, int type) |
d7e09d03 PT |
1012 | { |
1013 | rwlock_t *global_lock = &ksocknal_data.ksnd_global_lock; | |
1014 | LIST_HEAD (zombies); | |
1015 | lnet_process_id_t peerid; | |
1016 | struct list_head *tmp; | |
1017 | __u64 incarnation; | |
1018 | ksock_conn_t *conn; | |
1019 | ksock_conn_t *conn2; | |
1020 | ksock_peer_t *peer = NULL; | |
1021 | ksock_peer_t *peer2; | |
1022 | ksock_sched_t *sched; | |
1023 | ksock_hello_msg_t *hello; | |
1024 | int cpt; | |
1025 | ksock_tx_t *tx; | |
1026 | ksock_tx_t *txtmp; | |
1027 | int rc; | |
1028 | int active; | |
1029 | char *warn = NULL; | |
1030 | ||
1031 | active = (route != NULL); | |
1032 | ||
1033 | LASSERT (active == (type != SOCKLND_CONN_NONE)); | |
1034 | ||
1035 | LIBCFS_ALLOC(conn, sizeof(*conn)); | |
1036 | if (conn == NULL) { | |
1037 | rc = -ENOMEM; | |
1038 | goto failed_0; | |
1039 | } | |
1040 | ||
d7e09d03 PT |
1041 | conn->ksnc_peer = NULL; |
1042 | conn->ksnc_route = NULL; | |
1043 | conn->ksnc_sock = sock; | |
1044 | /* 2 ref, 1 for conn, another extra ref prevents socket | |
1045 | * being closed before establishment of connection */ | |
1046 | atomic_set (&conn->ksnc_sock_refcount, 2); | |
1047 | conn->ksnc_type = type; | |
1048 | ksocknal_lib_save_callback(sock, conn); | |
1049 | atomic_set (&conn->ksnc_conn_refcount, 1); /* 1 ref for me */ | |
1050 | ||
1051 | conn->ksnc_rx_ready = 0; | |
1052 | conn->ksnc_rx_scheduled = 0; | |
1053 | ||
1054 | INIT_LIST_HEAD (&conn->ksnc_tx_queue); | |
1055 | conn->ksnc_tx_ready = 0; | |
1056 | conn->ksnc_tx_scheduled = 0; | |
1057 | conn->ksnc_tx_carrier = NULL; | |
1058 | atomic_set (&conn->ksnc_tx_nob, 0); | |
1059 | ||
1060 | LIBCFS_ALLOC(hello, offsetof(ksock_hello_msg_t, | |
1061 | kshm_ips[LNET_MAX_INTERFACES])); | |
1062 | if (hello == NULL) { | |
1063 | rc = -ENOMEM; | |
1064 | goto failed_1; | |
1065 | } | |
1066 | ||
1067 | /* stash conn's local and remote addrs */ | |
1068 | rc = ksocknal_lib_get_conn_addrs (conn); | |
1069 | if (rc != 0) | |
1070 | goto failed_1; | |
1071 | ||
1072 | /* Find out/confirm peer's NID and connection type and get the | |
1073 | * vector of interfaces she's willing to let me connect to. | |
1074 | * Passive connections use the listener timeout since the peer sends | |
1075 | * eagerly */ | |
1076 | ||
1077 | if (active) { | |
1078 | peer = route->ksnr_peer; | |
1079 | LASSERT(ni == peer->ksnp_ni); | |
1080 | ||
1081 | /* Active connection sends HELLO eagerly */ | |
1082 | hello->kshm_nips = ksocknal_local_ipvec(ni, hello->kshm_ips); | |
1083 | peerid = peer->ksnp_id; | |
1084 | ||
1085 | write_lock_bh(global_lock); | |
1086 | conn->ksnc_proto = peer->ksnp_proto; | |
1087 | write_unlock_bh(global_lock); | |
1088 | ||
1089 | if (conn->ksnc_proto == NULL) { | |
1090 | conn->ksnc_proto = &ksocknal_protocol_v3x; | |
1091 | #if SOCKNAL_VERSION_DEBUG | |
1092 | if (*ksocknal_tunables.ksnd_protocol == 2) | |
1093 | conn->ksnc_proto = &ksocknal_protocol_v2x; | |
1094 | else if (*ksocknal_tunables.ksnd_protocol == 1) | |
1095 | conn->ksnc_proto = &ksocknal_protocol_v1x; | |
1096 | #endif | |
1097 | } | |
1098 | ||
1099 | rc = ksocknal_send_hello (ni, conn, peerid.nid, hello); | |
1100 | if (rc != 0) | |
1101 | goto failed_1; | |
1102 | } else { | |
1103 | peerid.nid = LNET_NID_ANY; | |
1104 | peerid.pid = LNET_PID_ANY; | |
1105 | ||
1106 | /* Passive, get protocol from peer */ | |
1107 | conn->ksnc_proto = NULL; | |
1108 | } | |
1109 | ||
1110 | rc = ksocknal_recv_hello (ni, conn, hello, &peerid, &incarnation); | |
1111 | if (rc < 0) | |
1112 | goto failed_1; | |
1113 | ||
1114 | LASSERT (rc == 0 || active); | |
1115 | LASSERT (conn->ksnc_proto != NULL); | |
1116 | LASSERT (peerid.nid != LNET_NID_ANY); | |
1117 | ||
1118 | cpt = lnet_cpt_of_nid(peerid.nid); | |
1119 | ||
1120 | if (active) { | |
1121 | ksocknal_peer_addref(peer); | |
1122 | write_lock_bh(global_lock); | |
1123 | } else { | |
1124 | rc = ksocknal_create_peer(&peer, ni, peerid); | |
1125 | if (rc != 0) | |
1126 | goto failed_1; | |
1127 | ||
1128 | write_lock_bh(global_lock); | |
1129 | ||
1130 | /* called with a ref on ni, so shutdown can't have started */ | |
1131 | LASSERT (((ksock_net_t *) ni->ni_data)->ksnn_shutdown == 0); | |
1132 | ||
1133 | peer2 = ksocknal_find_peer_locked(ni, peerid); | |
1134 | if (peer2 == NULL) { | |
1135 | /* NB this puts an "empty" peer in the peer | |
1136 | * table (which takes my ref) */ | |
1137 | list_add_tail(&peer->ksnp_list, | |
1138 | ksocknal_nid2peerlist(peerid.nid)); | |
1139 | } else { | |
1140 | ksocknal_peer_decref(peer); | |
1141 | peer = peer2; | |
1142 | } | |
1143 | ||
1144 | /* +1 ref for me */ | |
1145 | ksocknal_peer_addref(peer); | |
1146 | peer->ksnp_accepting++; | |
1147 | ||
1148 | /* Am I already connecting to this guy? Resolve in | |
1149 | * favour of higher NID... */ | |
1150 | if (peerid.nid < ni->ni_nid && | |
1151 | ksocknal_connecting(peer, conn->ksnc_ipaddr)) { | |
1152 | rc = EALREADY; | |
1153 | warn = "connection race resolution"; | |
1154 | goto failed_2; | |
1155 | } | |
1156 | } | |
1157 | ||
1158 | if (peer->ksnp_closing || | |
1159 | (active && route->ksnr_deleted)) { | |
1160 | /* peer/route got closed under me */ | |
1161 | rc = -ESTALE; | |
1162 | warn = "peer/route removed"; | |
1163 | goto failed_2; | |
1164 | } | |
1165 | ||
1166 | if (peer->ksnp_proto == NULL) { | |
1167 | /* Never connected before. | |
1168 | * NB recv_hello may have returned EPROTO to signal my peer | |
1169 | * wants a different protocol than the one I asked for. | |
1170 | */ | |
1171 | LASSERT (list_empty(&peer->ksnp_conns)); | |
1172 | ||
1173 | peer->ksnp_proto = conn->ksnc_proto; | |
1174 | peer->ksnp_incarnation = incarnation; | |
1175 | } | |
1176 | ||
1177 | if (peer->ksnp_proto != conn->ksnc_proto || | |
1178 | peer->ksnp_incarnation != incarnation) { | |
1179 | /* Peer rebooted or I've got the wrong protocol version */ | |
1180 | ksocknal_close_peer_conns_locked(peer, 0, 0); | |
1181 | ||
1182 | peer->ksnp_proto = NULL; | |
1183 | rc = ESTALE; | |
1184 | warn = peer->ksnp_incarnation != incarnation ? | |
1185 | "peer rebooted" : | |
1186 | "wrong proto version"; | |
1187 | goto failed_2; | |
1188 | } | |
1189 | ||
1190 | switch (rc) { | |
1191 | default: | |
1192 | LBUG(); | |
1193 | case 0: | |
1194 | break; | |
1195 | case EALREADY: | |
1196 | warn = "lost conn race"; | |
1197 | goto failed_2; | |
1198 | case EPROTO: | |
1199 | warn = "retry with different protocol version"; | |
1200 | goto failed_2; | |
1201 | } | |
1202 | ||
1203 | /* Refuse to duplicate an existing connection, unless this is a | |
1204 | * loopback connection */ | |
1205 | if (conn->ksnc_ipaddr != conn->ksnc_myipaddr) { | |
1206 | list_for_each(tmp, &peer->ksnp_conns) { | |
1207 | conn2 = list_entry(tmp, ksock_conn_t, ksnc_list); | |
1208 | ||
1209 | if (conn2->ksnc_ipaddr != conn->ksnc_ipaddr || | |
1210 | conn2->ksnc_myipaddr != conn->ksnc_myipaddr || | |
1211 | conn2->ksnc_type != conn->ksnc_type) | |
1212 | continue; | |
1213 | ||
1214 | /* Reply on a passive connection attempt so the peer | |
1215 | * realises we're connected. */ | |
1216 | LASSERT (rc == 0); | |
1217 | if (!active) | |
1218 | rc = EALREADY; | |
1219 | ||
1220 | warn = "duplicate"; | |
1221 | goto failed_2; | |
1222 | } | |
1223 | } | |
1224 | ||
1225 | /* If the connection created by this route didn't bind to the IP | |
1226 | * address the route connected to, the connection/route matching | |
1227 | * code below probably isn't going to work. */ | |
1228 | if (active && | |
1229 | route->ksnr_ipaddr != conn->ksnc_ipaddr) { | |
5e8f6920 | 1230 | CERROR("Route %s %pI4h connected to %pI4h\n", |
d7e09d03 | 1231 | libcfs_id2str(peer->ksnp_id), |
5e8f6920 PT |
1232 | &route->ksnr_ipaddr, |
1233 | &conn->ksnc_ipaddr); | |
d7e09d03 PT |
1234 | } |
1235 | ||
1236 | /* Search for a route corresponding to the new connection and | |
1237 | * create an association. This allows incoming connections created | |
1238 | * by routes in my peer to match my own route entries so I don't | |
1239 | * continually create duplicate routes. */ | |
1240 | list_for_each (tmp, &peer->ksnp_routes) { | |
1241 | route = list_entry(tmp, ksock_route_t, ksnr_list); | |
1242 | ||
1243 | if (route->ksnr_ipaddr != conn->ksnc_ipaddr) | |
1244 | continue; | |
1245 | ||
1246 | ksocknal_associate_route_conn_locked(route, conn); | |
1247 | break; | |
1248 | } | |
1249 | ||
1250 | conn->ksnc_peer = peer; /* conn takes my ref on peer */ | |
1251 | peer->ksnp_last_alive = cfs_time_current(); | |
1252 | peer->ksnp_send_keepalive = 0; | |
1253 | peer->ksnp_error = 0; | |
1254 | ||
1255 | sched = ksocknal_choose_scheduler_locked(cpt); | |
1256 | sched->kss_nconns++; | |
1257 | conn->ksnc_scheduler = sched; | |
1258 | ||
1259 | conn->ksnc_tx_last_post = cfs_time_current(); | |
1260 | /* Set the deadline for the outgoing HELLO to drain */ | |
fb4a1539 | 1261 | conn->ksnc_tx_bufnob = sock->sk->sk_wmem_queued; |
d7e09d03 PT |
1262 | conn->ksnc_tx_deadline = cfs_time_shift(*ksocknal_tunables.ksnd_timeout); |
1263 | mb(); /* order with adding to peer's conn list */ | |
1264 | ||
1265 | list_add (&conn->ksnc_list, &peer->ksnp_conns); | |
1266 | ksocknal_conn_addref(conn); | |
1267 | ||
1268 | ksocknal_new_packet(conn, 0); | |
1269 | ||
1270 | conn->ksnc_zc_capable = ksocknal_lib_zc_capable(conn); | |
1271 | ||
1272 | /* Take packets blocking for this connection. */ | |
1273 | list_for_each_entry_safe(tx, txtmp, &peer->ksnp_tx_queue, tx_list) { | |
1274 | if (conn->ksnc_proto->pro_match_tx(conn, tx, tx->tx_nonblk) == SOCKNAL_MATCH_NO) | |
1275 | continue; | |
1276 | ||
1277 | list_del (&tx->tx_list); | |
1278 | ksocknal_queue_tx_locked (tx, conn); | |
1279 | } | |
1280 | ||
1281 | write_unlock_bh(global_lock); | |
1282 | ||
1283 | /* We've now got a new connection. Any errors from here on are just | |
1284 | * like "normal" comms errors and we close the connection normally. | |
1285 | * NB (a) we still have to send the reply HELLO for passive | |
1286 | * connections, | |
1287 | * (b) normal I/O on the conn is blocked until I setup and call the | |
1288 | * socket callbacks. | |
1289 | */ | |
1290 | ||
5e8f6920 | 1291 | CDEBUG(D_NET, "New conn %s p %d.x %pI4h -> %pI4h/%d" |
f537dd2c | 1292 | " incarnation:%lld sched[%d:%d]\n", |
d7e09d03 | 1293 | libcfs_id2str(peerid), conn->ksnc_proto->pro_version, |
5e8f6920 | 1294 | &conn->ksnc_myipaddr, &conn->ksnc_ipaddr, |
d7e09d03 PT |
1295 | conn->ksnc_port, incarnation, cpt, |
1296 | (int)(sched - &sched->kss_info->ksi_scheds[0])); | |
1297 | ||
1298 | if (active) { | |
1299 | /* additional routes after interface exchange? */ | |
1300 | ksocknal_create_routes(peer, conn->ksnc_port, | |
1301 | hello->kshm_ips, hello->kshm_nips); | |
1302 | } else { | |
1303 | hello->kshm_nips = ksocknal_select_ips(peer, hello->kshm_ips, | |
1304 | hello->kshm_nips); | |
1305 | rc = ksocknal_send_hello(ni, conn, peerid.nid, hello); | |
1306 | } | |
1307 | ||
1308 | LIBCFS_FREE(hello, offsetof(ksock_hello_msg_t, | |
1309 | kshm_ips[LNET_MAX_INTERFACES])); | |
1310 | ||
1311 | /* setup the socket AFTER I've received hello (it disables | |
1312 | * SO_LINGER). I might call back to the acceptor who may want | |
1313 | * to send a protocol version response and then close the | |
1314 | * socket; this ensures the socket only tears down after the | |
1315 | * response has been sent. */ | |
1316 | if (rc == 0) | |
1317 | rc = ksocknal_lib_setup_sock(sock); | |
1318 | ||
1319 | write_lock_bh(global_lock); | |
1320 | ||
1321 | /* NB my callbacks block while I hold ksnd_global_lock */ | |
1322 | ksocknal_lib_set_callback(sock, conn); | |
1323 | ||
1324 | if (!active) | |
1325 | peer->ksnp_accepting--; | |
1326 | ||
1327 | write_unlock_bh(global_lock); | |
1328 | ||
1329 | if (rc != 0) { | |
1330 | write_lock_bh(global_lock); | |
1331 | if (!conn->ksnc_closing) { | |
1332 | /* could be closed by another thread */ | |
1333 | ksocknal_close_conn_locked(conn, rc); | |
1334 | } | |
1335 | write_unlock_bh(global_lock); | |
1336 | } else if (ksocknal_connsock_addref(conn) == 0) { | |
1337 | /* Allow I/O to proceed. */ | |
1338 | ksocknal_read_callback(conn); | |
1339 | ksocknal_write_callback(conn); | |
1340 | ksocknal_connsock_decref(conn); | |
1341 | } | |
1342 | ||
1343 | ksocknal_connsock_decref(conn); | |
1344 | ksocknal_conn_decref(conn); | |
1345 | return rc; | |
1346 | ||
1347 | failed_2: | |
1348 | if (!peer->ksnp_closing && | |
1349 | list_empty (&peer->ksnp_conns) && | |
1350 | list_empty (&peer->ksnp_routes)) { | |
1351 | list_add(&zombies, &peer->ksnp_tx_queue); | |
1352 | list_del_init(&peer->ksnp_tx_queue); | |
1353 | ksocknal_unlink_peer_locked(peer); | |
1354 | } | |
1355 | ||
1356 | write_unlock_bh(global_lock); | |
1357 | ||
1358 | if (warn != NULL) { | |
1359 | if (rc < 0) | |
1360 | CERROR("Not creating conn %s type %d: %s\n", | |
1361 | libcfs_id2str(peerid), conn->ksnc_type, warn); | |
1362 | else | |
1363 | CDEBUG(D_NET, "Not creating conn %s type %d: %s\n", | |
1364 | libcfs_id2str(peerid), conn->ksnc_type, warn); | |
1365 | } | |
1366 | ||
1367 | if (!active) { | |
1368 | if (rc > 0) { | |
1369 | /* Request retry by replying with CONN_NONE | |
1370 | * ksnc_proto has been set already */ | |
1371 | conn->ksnc_type = SOCKLND_CONN_NONE; | |
1372 | hello->kshm_nips = 0; | |
1373 | ksocknal_send_hello(ni, conn, peerid.nid, hello); | |
1374 | } | |
1375 | ||
1376 | write_lock_bh(global_lock); | |
1377 | peer->ksnp_accepting--; | |
1378 | write_unlock_bh(global_lock); | |
1379 | } | |
1380 | ||
1381 | ksocknal_txlist_done(ni, &zombies, 1); | |
1382 | ksocknal_peer_decref(peer); | |
1383 | ||
1384 | failed_1: | |
1385 | if (hello != NULL) | |
1386 | LIBCFS_FREE(hello, offsetof(ksock_hello_msg_t, | |
1387 | kshm_ips[LNET_MAX_INTERFACES])); | |
1388 | ||
1389 | LIBCFS_FREE (conn, sizeof(*conn)); | |
1390 | ||
1391 | failed_0: | |
1392 | libcfs_sock_release(sock); | |
1393 | return rc; | |
1394 | } | |
1395 | ||
1396 | void | |
1397 | ksocknal_close_conn_locked (ksock_conn_t *conn, int error) | |
1398 | { | |
1399 | /* This just does the immmediate housekeeping, and queues the | |
1400 | * connection for the reaper to terminate. | |
1401 | * Caller holds ksnd_global_lock exclusively in irq context */ | |
1402 | ksock_peer_t *peer = conn->ksnc_peer; | |
1403 | ksock_route_t *route; | |
1404 | ksock_conn_t *conn2; | |
1405 | struct list_head *tmp; | |
1406 | ||
1407 | LASSERT (peer->ksnp_error == 0); | |
1408 | LASSERT (!conn->ksnc_closing); | |
1409 | conn->ksnc_closing = 1; | |
1410 | ||
1411 | /* ksnd_deathrow_conns takes over peer's ref */ | |
1412 | list_del (&conn->ksnc_list); | |
1413 | ||
1414 | route = conn->ksnc_route; | |
1415 | if (route != NULL) { | |
1416 | /* dissociate conn from route... */ | |
1417 | LASSERT (!route->ksnr_deleted); | |
1418 | LASSERT ((route->ksnr_connected & (1 << conn->ksnc_type)) != 0); | |
1419 | ||
1420 | conn2 = NULL; | |
1421 | list_for_each(tmp, &peer->ksnp_conns) { | |
1422 | conn2 = list_entry(tmp, ksock_conn_t, ksnc_list); | |
1423 | ||
1424 | if (conn2->ksnc_route == route && | |
1425 | conn2->ksnc_type == conn->ksnc_type) | |
1426 | break; | |
1427 | ||
1428 | conn2 = NULL; | |
1429 | } | |
1430 | if (conn2 == NULL) | |
1431 | route->ksnr_connected &= ~(1 << conn->ksnc_type); | |
1432 | ||
1433 | conn->ksnc_route = NULL; | |
1434 | ||
2b284326 | 1435 | #if 0 /* irrelevant with only eager routes */ |
d7e09d03 PT |
1436 | /* make route least favourite */ |
1437 | list_del (&route->ksnr_list); | |
1438 | list_add_tail (&route->ksnr_list, &peer->ksnp_routes); | |
1439 | #endif | |
1440 | ksocknal_route_decref(route); /* drop conn's ref on route */ | |
1441 | } | |
1442 | ||
1443 | if (list_empty (&peer->ksnp_conns)) { | |
1444 | /* No more connections to this peer */ | |
1445 | ||
1446 | if (!list_empty(&peer->ksnp_tx_queue)) { | |
1447 | ksock_tx_t *tx; | |
1448 | ||
1449 | LASSERT (conn->ksnc_proto == &ksocknal_protocol_v3x); | |
1450 | ||
1451 | /* throw them to the last connection..., | |
1452 | * these TXs will be send to /dev/null by scheduler */ | |
1453 | list_for_each_entry(tx, &peer->ksnp_tx_queue, | |
1454 | tx_list) | |
1455 | ksocknal_tx_prep(conn, tx); | |
1456 | ||
1457 | spin_lock_bh(&conn->ksnc_scheduler->kss_lock); | |
1458 | list_splice_init(&peer->ksnp_tx_queue, | |
1459 | &conn->ksnc_tx_queue); | |
1460 | spin_unlock_bh(&conn->ksnc_scheduler->kss_lock); | |
1461 | } | |
1462 | ||
1463 | peer->ksnp_proto = NULL; /* renegotiate protocol version */ | |
1464 | peer->ksnp_error = error; /* stash last conn close reason */ | |
1465 | ||
1466 | if (list_empty (&peer->ksnp_routes)) { | |
1467 | /* I've just closed last conn belonging to a | |
1468 | * peer with no routes to it */ | |
1469 | ksocknal_unlink_peer_locked (peer); | |
1470 | } | |
1471 | } | |
1472 | ||
1473 | spin_lock_bh(&ksocknal_data.ksnd_reaper_lock); | |
1474 | ||
1475 | list_add_tail(&conn->ksnc_list, | |
1476 | &ksocknal_data.ksnd_deathrow_conns); | |
1477 | wake_up(&ksocknal_data.ksnd_reaper_waitq); | |
1478 | ||
1479 | spin_unlock_bh(&ksocknal_data.ksnd_reaper_lock); | |
1480 | } | |
1481 | ||
1482 | void | |
1483 | ksocknal_peer_failed (ksock_peer_t *peer) | |
1484 | { | |
1485 | int notify = 0; | |
a649ad1d | 1486 | unsigned long last_alive = 0; |
d7e09d03 PT |
1487 | |
1488 | /* There has been a connection failure or comms error; but I'll only | |
1489 | * tell LNET I think the peer is dead if it's to another kernel and | |
2b284326 | 1490 | * there are no connections or connection attempts in existence. */ |
d7e09d03 PT |
1491 | |
1492 | read_lock(&ksocknal_data.ksnd_global_lock); | |
1493 | ||
1494 | if ((peer->ksnp_id.pid & LNET_PID_USERFLAG) == 0 && | |
1495 | list_empty(&peer->ksnp_conns) && | |
1496 | peer->ksnp_accepting == 0 && | |
1497 | ksocknal_find_connecting_route_locked(peer) == NULL) { | |
1498 | notify = 1; | |
1499 | last_alive = peer->ksnp_last_alive; | |
1500 | } | |
1501 | ||
1502 | read_unlock(&ksocknal_data.ksnd_global_lock); | |
1503 | ||
1504 | if (notify) | |
1505 | lnet_notify (peer->ksnp_ni, peer->ksnp_id.nid, 0, | |
1506 | last_alive); | |
1507 | } | |
1508 | ||
1509 | void | |
1510 | ksocknal_finalize_zcreq(ksock_conn_t *conn) | |
1511 | { | |
1512 | ksock_peer_t *peer = conn->ksnc_peer; | |
1513 | ksock_tx_t *tx; | |
1514 | ksock_tx_t *tmp; | |
1515 | LIST_HEAD (zlist); | |
1516 | ||
1517 | /* NB safe to finalize TXs because closing of socket will | |
1518 | * abort all buffered data */ | |
1519 | LASSERT (conn->ksnc_sock == NULL); | |
1520 | ||
1521 | spin_lock(&peer->ksnp_lock); | |
1522 | ||
1523 | list_for_each_entry_safe(tx, tmp, &peer->ksnp_zc_req_list, tx_zc_list) { | |
1524 | if (tx->tx_conn != conn) | |
1525 | continue; | |
1526 | ||
1527 | LASSERT (tx->tx_msg.ksm_zc_cookies[0] != 0); | |
1528 | ||
1529 | tx->tx_msg.ksm_zc_cookies[0] = 0; | |
1530 | tx->tx_zc_aborted = 1; /* mark it as not-acked */ | |
1531 | list_del(&tx->tx_zc_list); | |
1532 | list_add(&tx->tx_zc_list, &zlist); | |
1533 | } | |
1534 | ||
1535 | spin_unlock(&peer->ksnp_lock); | |
1536 | ||
1537 | while (!list_empty(&zlist)) { | |
1538 | tx = list_entry(zlist.next, ksock_tx_t, tx_zc_list); | |
1539 | ||
1540 | list_del(&tx->tx_zc_list); | |
1541 | ksocknal_tx_decref(tx); | |
1542 | } | |
1543 | } | |
1544 | ||
1545 | void | |
1546 | ksocknal_terminate_conn (ksock_conn_t *conn) | |
1547 | { | |
1548 | /* This gets called by the reaper (guaranteed thread context) to | |
1549 | * disengage the socket from its callbacks and close it. | |
1550 | * ksnc_refcount will eventually hit zero, and then the reaper will | |
1551 | * destroy it. */ | |
1552 | ksock_peer_t *peer = conn->ksnc_peer; | |
1553 | ksock_sched_t *sched = conn->ksnc_scheduler; | |
1554 | int failed = 0; | |
1555 | ||
1556 | LASSERT(conn->ksnc_closing); | |
1557 | ||
1558 | /* wake up the scheduler to "send" all remaining packets to /dev/null */ | |
1559 | spin_lock_bh(&sched->kss_lock); | |
1560 | ||
1561 | /* a closing conn is always ready to tx */ | |
1562 | conn->ksnc_tx_ready = 1; | |
1563 | ||
1564 | if (!conn->ksnc_tx_scheduled && | |
991cc8d6 | 1565 | !list_empty(&conn->ksnc_tx_queue)) { |
d7e09d03 PT |
1566 | list_add_tail (&conn->ksnc_tx_list, |
1567 | &sched->kss_tx_conns); | |
1568 | conn->ksnc_tx_scheduled = 1; | |
1569 | /* extra ref for scheduler */ | |
1570 | ksocknal_conn_addref(conn); | |
1571 | ||
1572 | wake_up (&sched->kss_waitq); | |
1573 | } | |
1574 | ||
1575 | spin_unlock_bh(&sched->kss_lock); | |
1576 | ||
1577 | /* serialise with callbacks */ | |
1578 | write_lock_bh(&ksocknal_data.ksnd_global_lock); | |
1579 | ||
1580 | ksocknal_lib_reset_callback(conn->ksnc_sock, conn); | |
1581 | ||
1582 | /* OK, so this conn may not be completely disengaged from its | |
1583 | * scheduler yet, but it _has_ committed to terminate... */ | |
1584 | conn->ksnc_scheduler->kss_nconns--; | |
1585 | ||
1586 | if (peer->ksnp_error != 0) { | |
1587 | /* peer's last conn closed in error */ | |
1588 | LASSERT (list_empty (&peer->ksnp_conns)); | |
1589 | failed = 1; | |
1590 | peer->ksnp_error = 0; /* avoid multiple notifications */ | |
1591 | } | |
1592 | ||
1593 | write_unlock_bh(&ksocknal_data.ksnd_global_lock); | |
1594 | ||
1595 | if (failed) | |
1596 | ksocknal_peer_failed(peer); | |
1597 | ||
1598 | /* The socket is closed on the final put; either here, or in | |
1599 | * ksocknal_{send,recv}msg(). Since we set up the linger2 option | |
1600 | * when the connection was established, this will close the socket | |
1601 | * immediately, aborting anything buffered in it. Any hung | |
1602 | * zero-copy transmits will therefore complete in finite time. */ | |
1603 | ksocknal_connsock_decref(conn); | |
1604 | } | |
1605 | ||
1606 | void | |
1607 | ksocknal_queue_zombie_conn (ksock_conn_t *conn) | |
1608 | { | |
1609 | /* Queue the conn for the reaper to destroy */ | |
1610 | ||
1611 | LASSERT(atomic_read(&conn->ksnc_conn_refcount) == 0); | |
1612 | spin_lock_bh(&ksocknal_data.ksnd_reaper_lock); | |
1613 | ||
1614 | list_add_tail(&conn->ksnc_list, &ksocknal_data.ksnd_zombie_conns); | |
1615 | wake_up(&ksocknal_data.ksnd_reaper_waitq); | |
1616 | ||
1617 | spin_unlock_bh(&ksocknal_data.ksnd_reaper_lock); | |
1618 | } | |
1619 | ||
1620 | void | |
1621 | ksocknal_destroy_conn (ksock_conn_t *conn) | |
1622 | { | |
a649ad1d | 1623 | unsigned long last_rcv; |
d7e09d03 PT |
1624 | |
1625 | /* Final coup-de-grace of the reaper */ | |
1626 | CDEBUG (D_NET, "connection %p\n", conn); | |
1627 | ||
1628 | LASSERT (atomic_read (&conn->ksnc_conn_refcount) == 0); | |
1629 | LASSERT (atomic_read (&conn->ksnc_sock_refcount) == 0); | |
1630 | LASSERT (conn->ksnc_sock == NULL); | |
1631 | LASSERT (conn->ksnc_route == NULL); | |
1632 | LASSERT (!conn->ksnc_tx_scheduled); | |
1633 | LASSERT (!conn->ksnc_rx_scheduled); | |
1634 | LASSERT (list_empty(&conn->ksnc_tx_queue)); | |
1635 | ||
1636 | /* complete current receive if any */ | |
1637 | switch (conn->ksnc_rx_state) { | |
1638 | case SOCKNAL_RX_LNET_PAYLOAD: | |
1639 | last_rcv = conn->ksnc_rx_deadline - | |
1640 | cfs_time_seconds(*ksocknal_tunables.ksnd_timeout); | |
1641 | CERROR("Completing partial receive from %s[%d]" | |
5e8f6920 | 1642 | ", ip %pI4h:%d, with error, wanted: %d, left: %d, " |
d7e09d03 PT |
1643 | "last alive is %ld secs ago\n", |
1644 | libcfs_id2str(conn->ksnc_peer->ksnp_id), conn->ksnc_type, | |
5e8f6920 | 1645 | &conn->ksnc_ipaddr, conn->ksnc_port, |
d7e09d03 PT |
1646 | conn->ksnc_rx_nob_wanted, conn->ksnc_rx_nob_left, |
1647 | cfs_duration_sec(cfs_time_sub(cfs_time_current(), | |
1648 | last_rcv))); | |
1649 | lnet_finalize (conn->ksnc_peer->ksnp_ni, | |
1650 | conn->ksnc_cookie, -EIO); | |
1651 | break; | |
1652 | case SOCKNAL_RX_LNET_HEADER: | |
1653 | if (conn->ksnc_rx_started) | |
1654 | CERROR("Incomplete receive of lnet header from %s" | |
5e8f6920 | 1655 | ", ip %pI4h:%d, with error, protocol: %d.x.\n", |
d7e09d03 | 1656 | libcfs_id2str(conn->ksnc_peer->ksnp_id), |
5e8f6920 | 1657 | &conn->ksnc_ipaddr, conn->ksnc_port, |
d7e09d03 PT |
1658 | conn->ksnc_proto->pro_version); |
1659 | break; | |
1660 | case SOCKNAL_RX_KSM_HEADER: | |
1661 | if (conn->ksnc_rx_started) | |
1662 | CERROR("Incomplete receive of ksock message from %s" | |
5e8f6920 | 1663 | ", ip %pI4h:%d, with error, protocol: %d.x.\n", |
d7e09d03 | 1664 | libcfs_id2str(conn->ksnc_peer->ksnp_id), |
5e8f6920 | 1665 | &conn->ksnc_ipaddr, conn->ksnc_port, |
d7e09d03 PT |
1666 | conn->ksnc_proto->pro_version); |
1667 | break; | |
1668 | case SOCKNAL_RX_SLOP: | |
1669 | if (conn->ksnc_rx_started) | |
1670 | CERROR("Incomplete receive of slops from %s" | |
5e8f6920 | 1671 | ", ip %pI4h:%d, with error\n", |
d7e09d03 | 1672 | libcfs_id2str(conn->ksnc_peer->ksnp_id), |
5e8f6920 | 1673 | &conn->ksnc_ipaddr, conn->ksnc_port); |
d7e09d03 PT |
1674 | break; |
1675 | default: | |
1676 | LBUG (); | |
1677 | break; | |
1678 | } | |
1679 | ||
1680 | ksocknal_peer_decref(conn->ksnc_peer); | |
1681 | ||
1682 | LIBCFS_FREE (conn, sizeof (*conn)); | |
1683 | } | |
1684 | ||
1685 | int | |
1686 | ksocknal_close_peer_conns_locked (ksock_peer_t *peer, __u32 ipaddr, int why) | |
1687 | { | |
1688 | ksock_conn_t *conn; | |
1689 | struct list_head *ctmp; | |
1690 | struct list_head *cnxt; | |
1691 | int count = 0; | |
1692 | ||
1693 | list_for_each_safe (ctmp, cnxt, &peer->ksnp_conns) { | |
1694 | conn = list_entry (ctmp, ksock_conn_t, ksnc_list); | |
1695 | ||
1696 | if (ipaddr == 0 || | |
1697 | conn->ksnc_ipaddr == ipaddr) { | |
1698 | count++; | |
1699 | ksocknal_close_conn_locked (conn, why); | |
1700 | } | |
1701 | } | |
1702 | ||
a1f659d4 | 1703 | return count; |
d7e09d03 PT |
1704 | } |
1705 | ||
1706 | int | |
1707 | ksocknal_close_conn_and_siblings (ksock_conn_t *conn, int why) | |
1708 | { | |
1709 | ksock_peer_t *peer = conn->ksnc_peer; | |
1710 | __u32 ipaddr = conn->ksnc_ipaddr; | |
1711 | int count; | |
1712 | ||
1713 | write_lock_bh(&ksocknal_data.ksnd_global_lock); | |
1714 | ||
1715 | count = ksocknal_close_peer_conns_locked (peer, ipaddr, why); | |
1716 | ||
1717 | write_unlock_bh(&ksocknal_data.ksnd_global_lock); | |
1718 | ||
a1f659d4 | 1719 | return count; |
d7e09d03 PT |
1720 | } |
1721 | ||
1722 | int | |
1723 | ksocknal_close_matching_conns (lnet_process_id_t id, __u32 ipaddr) | |
1724 | { | |
1725 | ksock_peer_t *peer; | |
1726 | struct list_head *ptmp; | |
1727 | struct list_head *pnxt; | |
1728 | int lo; | |
1729 | int hi; | |
1730 | int i; | |
1731 | int count = 0; | |
1732 | ||
1733 | write_lock_bh(&ksocknal_data.ksnd_global_lock); | |
1734 | ||
1735 | if (id.nid != LNET_NID_ANY) | |
1736 | lo = hi = (int)(ksocknal_nid2peerlist(id.nid) - ksocknal_data.ksnd_peers); | |
1737 | else { | |
1738 | lo = 0; | |
1739 | hi = ksocknal_data.ksnd_peer_hash_size - 1; | |
1740 | } | |
1741 | ||
1742 | for (i = lo; i <= hi; i++) { | |
1743 | list_for_each_safe (ptmp, pnxt, | |
1744 | &ksocknal_data.ksnd_peers[i]) { | |
1745 | ||
1746 | peer = list_entry (ptmp, ksock_peer_t, ksnp_list); | |
1747 | ||
1748 | if (!((id.nid == LNET_NID_ANY || id.nid == peer->ksnp_id.nid) && | |
1749 | (id.pid == LNET_PID_ANY || id.pid == peer->ksnp_id.pid))) | |
1750 | continue; | |
1751 | ||
1752 | count += ksocknal_close_peer_conns_locked (peer, ipaddr, 0); | |
1753 | } | |
1754 | } | |
1755 | ||
1756 | write_unlock_bh(&ksocknal_data.ksnd_global_lock); | |
1757 | ||
1758 | /* wildcards always succeed */ | |
1759 | if (id.nid == LNET_NID_ANY || id.pid == LNET_PID_ANY || ipaddr == 0) | |
a1f659d4 | 1760 | return 0; |
d7e09d03 | 1761 | |
6a123705 LN |
1762 | if (count == 0) |
1763 | return -ENOENT; | |
1764 | else | |
1765 | return 0; | |
d7e09d03 PT |
1766 | } |
1767 | ||
1768 | void | |
1769 | ksocknal_notify (lnet_ni_t *ni, lnet_nid_t gw_nid, int alive) | |
1770 | { | |
1771 | /* The router is telling me she's been notified of a change in | |
1772 | * gateway state.... */ | |
1773 | lnet_process_id_t id = {0}; | |
1774 | ||
1775 | id.nid = gw_nid; | |
1776 | id.pid = LNET_PID_ANY; | |
1777 | ||
1778 | CDEBUG (D_NET, "gw %s %s\n", libcfs_nid2str(gw_nid), | |
1779 | alive ? "up" : "down"); | |
1780 | ||
1781 | if (!alive) { | |
1782 | /* If the gateway crashed, close all open connections... */ | |
1783 | ksocknal_close_matching_conns (id, 0); | |
1784 | return; | |
1785 | } | |
1786 | ||
1787 | /* ...otherwise do nothing. We can only establish new connections | |
1788 | * if we have autroutes, and these connect on demand. */ | |
1789 | } | |
1790 | ||
1791 | void | |
a649ad1d | 1792 | ksocknal_query (lnet_ni_t *ni, lnet_nid_t nid, unsigned long *when) |
d7e09d03 PT |
1793 | { |
1794 | int connect = 1; | |
a649ad1d GKH |
1795 | unsigned long last_alive = 0; |
1796 | unsigned long now = cfs_time_current(); | |
d7e09d03 PT |
1797 | ksock_peer_t *peer = NULL; |
1798 | rwlock_t *glock = &ksocknal_data.ksnd_global_lock; | |
1799 | lnet_process_id_t id = {.nid = nid, .pid = LUSTRE_SRV_LNET_PID}; | |
1800 | ||
1801 | read_lock(glock); | |
1802 | ||
1803 | peer = ksocknal_find_peer_locked(ni, id); | |
1804 | if (peer != NULL) { | |
1805 | struct list_head *tmp; | |
1806 | ksock_conn_t *conn; | |
1807 | int bufnob; | |
1808 | ||
1809 | list_for_each (tmp, &peer->ksnp_conns) { | |
1810 | conn = list_entry(tmp, ksock_conn_t, ksnc_list); | |
fb4a1539 | 1811 | bufnob = conn->ksnc_sock->sk->sk_wmem_queued; |
d7e09d03 PT |
1812 | |
1813 | if (bufnob < conn->ksnc_tx_bufnob) { | |
1814 | /* something got ACKed */ | |
1815 | conn->ksnc_tx_deadline = | |
1816 | cfs_time_shift(*ksocknal_tunables.ksnd_timeout); | |
1817 | peer->ksnp_last_alive = now; | |
1818 | conn->ksnc_tx_bufnob = bufnob; | |
1819 | } | |
1820 | } | |
1821 | ||
1822 | last_alive = peer->ksnp_last_alive; | |
1823 | if (ksocknal_find_connectable_route_locked(peer) == NULL) | |
1824 | connect = 0; | |
1825 | } | |
1826 | ||
1827 | read_unlock(glock); | |
1828 | ||
1829 | if (last_alive != 0) | |
1830 | *when = last_alive; | |
1831 | ||
1832 | CDEBUG(D_NET, "Peer %s %p, alive %ld secs ago, connect %d\n", | |
1833 | libcfs_nid2str(nid), peer, | |
1834 | last_alive ? cfs_duration_sec(now - last_alive) : -1, | |
1835 | connect); | |
1836 | ||
1837 | if (!connect) | |
1838 | return; | |
1839 | ||
1840 | ksocknal_add_peer(ni, id, LNET_NIDADDR(nid), lnet_acceptor_port()); | |
1841 | ||
1842 | write_lock_bh(glock); | |
1843 | ||
1844 | peer = ksocknal_find_peer_locked(ni, id); | |
1845 | if (peer != NULL) | |
1846 | ksocknal_launch_all_connections_locked(peer); | |
1847 | ||
1848 | write_unlock_bh(glock); | |
1849 | return; | |
1850 | } | |
1851 | ||
0b913529 | 1852 | static void |
d7e09d03 PT |
1853 | ksocknal_push_peer (ksock_peer_t *peer) |
1854 | { | |
1855 | int index; | |
1856 | int i; | |
1857 | struct list_head *tmp; | |
1858 | ksock_conn_t *conn; | |
1859 | ||
1860 | for (index = 0; ; index++) { | |
1861 | read_lock(&ksocknal_data.ksnd_global_lock); | |
1862 | ||
1863 | i = 0; | |
1864 | conn = NULL; | |
1865 | ||
1866 | list_for_each (tmp, &peer->ksnp_conns) { | |
1867 | if (i++ == index) { | |
1868 | conn = list_entry (tmp, ksock_conn_t, | |
1869 | ksnc_list); | |
1870 | ksocknal_conn_addref(conn); | |
1871 | break; | |
1872 | } | |
1873 | } | |
1874 | ||
1875 | read_unlock(&ksocknal_data.ksnd_global_lock); | |
1876 | ||
1877 | if (conn == NULL) | |
1878 | break; | |
1879 | ||
1880 | ksocknal_lib_push_conn (conn); | |
1881 | ksocknal_conn_decref(conn); | |
1882 | } | |
1883 | } | |
1884 | ||
0b913529 | 1885 | static int |
d7e09d03 PT |
1886 | ksocknal_push (lnet_ni_t *ni, lnet_process_id_t id) |
1887 | { | |
1888 | ksock_peer_t *peer; | |
1889 | struct list_head *tmp; | |
1890 | int index; | |
1891 | int i; | |
1892 | int j; | |
1893 | int rc = -ENOENT; | |
1894 | ||
1895 | for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) { | |
1896 | for (j = 0; ; j++) { | |
1897 | read_lock(&ksocknal_data.ksnd_global_lock); | |
1898 | ||
1899 | index = 0; | |
1900 | peer = NULL; | |
1901 | ||
1902 | list_for_each (tmp, &ksocknal_data.ksnd_peers[i]) { | |
1903 | peer = list_entry(tmp, ksock_peer_t, | |
1904 | ksnp_list); | |
1905 | ||
1906 | if (!((id.nid == LNET_NID_ANY || | |
1907 | id.nid == peer->ksnp_id.nid) && | |
1908 | (id.pid == LNET_PID_ANY || | |
1909 | id.pid == peer->ksnp_id.pid))) { | |
1910 | peer = NULL; | |
1911 | continue; | |
1912 | } | |
1913 | ||
1914 | if (index++ == j) { | |
1915 | ksocknal_peer_addref(peer); | |
1916 | break; | |
1917 | } | |
1918 | } | |
1919 | ||
1920 | read_unlock(&ksocknal_data.ksnd_global_lock); | |
1921 | ||
1922 | if (peer != NULL) { | |
1923 | rc = 0; | |
1924 | ksocknal_push_peer (peer); | |
1925 | ksocknal_peer_decref(peer); | |
1926 | } | |
1927 | } | |
1928 | ||
1929 | } | |
1930 | ||
a1f659d4 | 1931 | return rc; |
d7e09d03 PT |
1932 | } |
1933 | ||
0b913529 | 1934 | static int |
d7e09d03 PT |
1935 | ksocknal_add_interface(lnet_ni_t *ni, __u32 ipaddress, __u32 netmask) |
1936 | { | |
1937 | ksock_net_t *net = ni->ni_data; | |
1938 | ksock_interface_t *iface; | |
1939 | int rc; | |
1940 | int i; | |
1941 | int j; | |
1942 | struct list_head *ptmp; | |
1943 | ksock_peer_t *peer; | |
1944 | struct list_head *rtmp; | |
1945 | ksock_route_t *route; | |
1946 | ||
1947 | if (ipaddress == 0 || | |
1948 | netmask == 0) | |
71397095 | 1949 | return -EINVAL; |
d7e09d03 PT |
1950 | |
1951 | write_lock_bh(&ksocknal_data.ksnd_global_lock); | |
1952 | ||
1953 | iface = ksocknal_ip2iface(ni, ipaddress); | |
1954 | if (iface != NULL) { | |
1955 | /* silently ignore dups */ | |
1956 | rc = 0; | |
1957 | } else if (net->ksnn_ninterfaces == LNET_MAX_INTERFACES) { | |
1958 | rc = -ENOSPC; | |
1959 | } else { | |
1960 | iface = &net->ksnn_interfaces[net->ksnn_ninterfaces++]; | |
1961 | ||
1962 | iface->ksni_ipaddr = ipaddress; | |
1963 | iface->ksni_netmask = netmask; | |
1964 | iface->ksni_nroutes = 0; | |
1965 | iface->ksni_npeers = 0; | |
1966 | ||
1967 | for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) { | |
1968 | list_for_each(ptmp, &ksocknal_data.ksnd_peers[i]) { | |
1969 | peer = list_entry(ptmp, ksock_peer_t, | |
1970 | ksnp_list); | |
1971 | ||
1972 | for (j = 0; j < peer->ksnp_n_passive_ips; j++) | |
1973 | if (peer->ksnp_passive_ips[j] == ipaddress) | |
1974 | iface->ksni_npeers++; | |
1975 | ||
1976 | list_for_each(rtmp, &peer->ksnp_routes) { | |
1977 | route = list_entry(rtmp, | |
1978 | ksock_route_t, | |
1979 | ksnr_list); | |
1980 | ||
1981 | if (route->ksnr_myipaddr == ipaddress) | |
1982 | iface->ksni_nroutes++; | |
1983 | } | |
1984 | } | |
1985 | } | |
1986 | ||
1987 | rc = 0; | |
1988 | /* NB only new connections will pay attention to the new interface! */ | |
1989 | } | |
1990 | ||
1991 | write_unlock_bh(&ksocknal_data.ksnd_global_lock); | |
1992 | ||
a1f659d4 | 1993 | return rc; |
d7e09d03 PT |
1994 | } |
1995 | ||
0b913529 | 1996 | static void |
d7e09d03 PT |
1997 | ksocknal_peer_del_interface_locked(ksock_peer_t *peer, __u32 ipaddr) |
1998 | { | |
1999 | struct list_head *tmp; | |
2000 | struct list_head *nxt; | |
2001 | ksock_route_t *route; | |
2002 | ksock_conn_t *conn; | |
2003 | int i; | |
2004 | int j; | |
2005 | ||
2006 | for (i = 0; i < peer->ksnp_n_passive_ips; i++) | |
2007 | if (peer->ksnp_passive_ips[i] == ipaddr) { | |
2008 | for (j = i+1; j < peer->ksnp_n_passive_ips; j++) | |
2009 | peer->ksnp_passive_ips[j-1] = | |
2010 | peer->ksnp_passive_ips[j]; | |
2011 | peer->ksnp_n_passive_ips--; | |
2012 | break; | |
2013 | } | |
2014 | ||
2015 | list_for_each_safe(tmp, nxt, &peer->ksnp_routes) { | |
2016 | route = list_entry (tmp, ksock_route_t, ksnr_list); | |
2017 | ||
2018 | if (route->ksnr_myipaddr != ipaddr) | |
2019 | continue; | |
2020 | ||
2021 | if (route->ksnr_share_count != 0) { | |
2022 | /* Manually created; keep, but unbind */ | |
2023 | route->ksnr_myipaddr = 0; | |
2024 | } else { | |
2025 | ksocknal_del_route_locked(route); | |
2026 | } | |
2027 | } | |
2028 | ||
2029 | list_for_each_safe(tmp, nxt, &peer->ksnp_conns) { | |
2030 | conn = list_entry(tmp, ksock_conn_t, ksnc_list); | |
2031 | ||
2032 | if (conn->ksnc_myipaddr == ipaddr) | |
2033 | ksocknal_close_conn_locked (conn, 0); | |
2034 | } | |
2035 | } | |
2036 | ||
0b913529 | 2037 | static int |
d7e09d03 PT |
2038 | ksocknal_del_interface(lnet_ni_t *ni, __u32 ipaddress) |
2039 | { | |
2040 | ksock_net_t *net = ni->ni_data; | |
2041 | int rc = -ENOENT; | |
2042 | struct list_head *tmp; | |
2043 | struct list_head *nxt; | |
2044 | ksock_peer_t *peer; | |
2045 | __u32 this_ip; | |
2046 | int i; | |
2047 | int j; | |
2048 | ||
2049 | write_lock_bh(&ksocknal_data.ksnd_global_lock); | |
2050 | ||
2051 | for (i = 0; i < net->ksnn_ninterfaces; i++) { | |
2052 | this_ip = net->ksnn_interfaces[i].ksni_ipaddr; | |
2053 | ||
2054 | if (!(ipaddress == 0 || | |
2055 | ipaddress == this_ip)) | |
2056 | continue; | |
2057 | ||
2058 | rc = 0; | |
2059 | ||
2060 | for (j = i+1; j < net->ksnn_ninterfaces; j++) | |
2061 | net->ksnn_interfaces[j-1] = | |
2062 | net->ksnn_interfaces[j]; | |
2063 | ||
2064 | net->ksnn_ninterfaces--; | |
2065 | ||
2066 | for (j = 0; j < ksocknal_data.ksnd_peer_hash_size; j++) { | |
2067 | list_for_each_safe(tmp, nxt, | |
2068 | &ksocknal_data.ksnd_peers[j]) { | |
2069 | peer = list_entry(tmp, ksock_peer_t, | |
2070 | ksnp_list); | |
2071 | ||
2072 | if (peer->ksnp_ni != ni) | |
2073 | continue; | |
2074 | ||
2075 | ksocknal_peer_del_interface_locked(peer, this_ip); | |
2076 | } | |
2077 | } | |
2078 | } | |
2079 | ||
2080 | write_unlock_bh(&ksocknal_data.ksnd_global_lock); | |
2081 | ||
a1f659d4 | 2082 | return rc; |
d7e09d03 PT |
2083 | } |
2084 | ||
2085 | int | |
2086 | ksocknal_ctl(lnet_ni_t *ni, unsigned int cmd, void *arg) | |
2087 | { | |
2088 | lnet_process_id_t id = {0}; | |
2089 | struct libcfs_ioctl_data *data = arg; | |
2090 | int rc; | |
2091 | ||
991cc8d6 | 2092 | switch (cmd) { |
d7e09d03 PT |
2093 | case IOC_LIBCFS_GET_INTERFACE: { |
2094 | ksock_net_t *net = ni->ni_data; | |
2095 | ksock_interface_t *iface; | |
2096 | ||
2097 | read_lock(&ksocknal_data.ksnd_global_lock); | |
2098 | ||
2099 | if (data->ioc_count >= (__u32)net->ksnn_ninterfaces) { | |
2100 | rc = -ENOENT; | |
2101 | } else { | |
2102 | rc = 0; | |
2103 | iface = &net->ksnn_interfaces[data->ioc_count]; | |
2104 | ||
2105 | data->ioc_u32[0] = iface->ksni_ipaddr; | |
2106 | data->ioc_u32[1] = iface->ksni_netmask; | |
2107 | data->ioc_u32[2] = iface->ksni_npeers; | |
2108 | data->ioc_u32[3] = iface->ksni_nroutes; | |
2109 | } | |
2110 | ||
2111 | read_unlock(&ksocknal_data.ksnd_global_lock); | |
2112 | return rc; | |
2113 | } | |
2114 | ||
2115 | case IOC_LIBCFS_ADD_INTERFACE: | |
2116 | return ksocknal_add_interface(ni, | |
2117 | data->ioc_u32[0], /* IP address */ | |
2118 | data->ioc_u32[1]); /* net mask */ | |
2119 | ||
2120 | case IOC_LIBCFS_DEL_INTERFACE: | |
2121 | return ksocknal_del_interface(ni, | |
2122 | data->ioc_u32[0]); /* IP address */ | |
2123 | ||
2124 | case IOC_LIBCFS_GET_PEER: { | |
2125 | __u32 myip = 0; | |
2126 | __u32 ip = 0; | |
2127 | int port = 0; | |
2128 | int conn_count = 0; | |
2129 | int share_count = 0; | |
2130 | ||
2131 | rc = ksocknal_get_peer_info(ni, data->ioc_count, | |
2132 | &id, &myip, &ip, &port, | |
2133 | &conn_count, &share_count); | |
2134 | if (rc != 0) | |
2135 | return rc; | |
2136 | ||
2137 | data->ioc_nid = id.nid; | |
2138 | data->ioc_count = share_count; | |
2139 | data->ioc_u32[0] = ip; | |
2140 | data->ioc_u32[1] = port; | |
2141 | data->ioc_u32[2] = myip; | |
2142 | data->ioc_u32[3] = conn_count; | |
2143 | data->ioc_u32[4] = id.pid; | |
2144 | return 0; | |
2145 | } | |
2146 | ||
2147 | case IOC_LIBCFS_ADD_PEER: | |
2148 | id.nid = data->ioc_nid; | |
2149 | id.pid = LUSTRE_SRV_LNET_PID; | |
2150 | return ksocknal_add_peer (ni, id, | |
2151 | data->ioc_u32[0], /* IP */ | |
2152 | data->ioc_u32[1]); /* port */ | |
2153 | ||
2154 | case IOC_LIBCFS_DEL_PEER: | |
2155 | id.nid = data->ioc_nid; | |
2156 | id.pid = LNET_PID_ANY; | |
2157 | return ksocknal_del_peer (ni, id, | |
2158 | data->ioc_u32[0]); /* IP */ | |
2159 | ||
2160 | case IOC_LIBCFS_GET_CONN: { | |
2161 | int txmem; | |
2162 | int rxmem; | |
2163 | int nagle; | |
2164 | ksock_conn_t *conn = ksocknal_get_conn_by_idx (ni, data->ioc_count); | |
2165 | ||
2166 | if (conn == NULL) | |
2167 | return -ENOENT; | |
2168 | ||
2169 | ksocknal_lib_get_conn_tunables(conn, &txmem, &rxmem, &nagle); | |
2170 | ||
2171 | data->ioc_count = txmem; | |
2172 | data->ioc_nid = conn->ksnc_peer->ksnp_id.nid; | |
2173 | data->ioc_flags = nagle; | |
2174 | data->ioc_u32[0] = conn->ksnc_ipaddr; | |
2175 | data->ioc_u32[1] = conn->ksnc_port; | |
2176 | data->ioc_u32[2] = conn->ksnc_myipaddr; | |
2177 | data->ioc_u32[3] = conn->ksnc_type; | |
2178 | data->ioc_u32[4] = conn->ksnc_scheduler->kss_info->ksi_cpt; | |
2179 | data->ioc_u32[5] = rxmem; | |
2180 | data->ioc_u32[6] = conn->ksnc_peer->ksnp_id.pid; | |
2181 | ksocknal_conn_decref(conn); | |
2182 | return 0; | |
2183 | } | |
2184 | ||
2185 | case IOC_LIBCFS_CLOSE_CONNECTION: | |
2186 | id.nid = data->ioc_nid; | |
2187 | id.pid = LNET_PID_ANY; | |
2188 | return ksocknal_close_matching_conns (id, | |
2189 | data->ioc_u32[0]); | |
2190 | ||
2191 | case IOC_LIBCFS_REGISTER_MYNID: | |
2192 | /* Ignore if this is a noop */ | |
2193 | if (data->ioc_nid == ni->ni_nid) | |
2194 | return 0; | |
2195 | ||
2196 | CERROR("obsolete IOC_LIBCFS_REGISTER_MYNID: %s(%s)\n", | |
2197 | libcfs_nid2str(data->ioc_nid), | |
2198 | libcfs_nid2str(ni->ni_nid)); | |
2199 | return -EINVAL; | |
2200 | ||
2201 | case IOC_LIBCFS_PUSH_CONNECTION: | |
2202 | id.nid = data->ioc_nid; | |
2203 | id.pid = LNET_PID_ANY; | |
2204 | return ksocknal_push(ni, id); | |
2205 | ||
2206 | default: | |
2207 | return -EINVAL; | |
2208 | } | |
2209 | /* not reached */ | |
2210 | } | |
2211 | ||
0b913529 | 2212 | static void |
d7e09d03 PT |
2213 | ksocknal_free_buffers (void) |
2214 | { | |
2215 | LASSERT (atomic_read(&ksocknal_data.ksnd_nactive_txs) == 0); | |
2216 | ||
2217 | if (ksocknal_data.ksnd_sched_info != NULL) { | |
2218 | struct ksock_sched_info *info; | |
2219 | int i; | |
2220 | ||
2221 | cfs_percpt_for_each(info, i, ksocknal_data.ksnd_sched_info) { | |
2222 | if (info->ksi_scheds != NULL) { | |
2223 | LIBCFS_FREE(info->ksi_scheds, | |
2224 | info->ksi_nthreads_max * | |
2225 | sizeof(info->ksi_scheds[0])); | |
2226 | } | |
2227 | } | |
2228 | cfs_percpt_free(ksocknal_data.ksnd_sched_info); | |
2229 | } | |
2230 | ||
2231 | LIBCFS_FREE (ksocknal_data.ksnd_peers, | |
2232 | sizeof (struct list_head) * | |
2233 | ksocknal_data.ksnd_peer_hash_size); | |
2234 | ||
2235 | spin_lock(&ksocknal_data.ksnd_tx_lock); | |
2236 | ||
2237 | if (!list_empty(&ksocknal_data.ksnd_idle_noop_txs)) { | |
2238 | struct list_head zlist; | |
2239 | ksock_tx_t *tx; | |
2240 | ||
2241 | list_add(&zlist, &ksocknal_data.ksnd_idle_noop_txs); | |
2242 | list_del_init(&ksocknal_data.ksnd_idle_noop_txs); | |
2243 | spin_unlock(&ksocknal_data.ksnd_tx_lock); | |
2244 | ||
2245 | while (!list_empty(&zlist)) { | |
2246 | tx = list_entry(zlist.next, ksock_tx_t, tx_list); | |
2247 | list_del(&tx->tx_list); | |
2248 | LIBCFS_FREE(tx, tx->tx_desc_size); | |
2249 | } | |
2250 | } else { | |
2251 | spin_unlock(&ksocknal_data.ksnd_tx_lock); | |
2252 | } | |
2253 | } | |
2254 | ||
0b913529 | 2255 | static void |
d7e09d03 PT |
2256 | ksocknal_base_shutdown(void) |
2257 | { | |
2258 | struct ksock_sched_info *info; | |
2259 | ksock_sched_t *sched; | |
2260 | int i; | |
2261 | int j; | |
2262 | ||
2263 | CDEBUG(D_MALLOC, "before NAL cleanup: kmem %d\n", | |
2264 | atomic_read (&libcfs_kmemory)); | |
2265 | LASSERT (ksocknal_data.ksnd_nnets == 0); | |
2266 | ||
2267 | switch (ksocknal_data.ksnd_init) { | |
2268 | default: | |
2269 | LASSERT (0); | |
2270 | ||
2271 | case SOCKNAL_INIT_ALL: | |
2272 | case SOCKNAL_INIT_DATA: | |
2273 | LASSERT (ksocknal_data.ksnd_peers != NULL); | |
2274 | for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) { | |
2275 | LASSERT (list_empty (&ksocknal_data.ksnd_peers[i])); | |
2276 | } | |
2277 | ||
2278 | LASSERT(list_empty(&ksocknal_data.ksnd_nets)); | |
2279 | LASSERT (list_empty (&ksocknal_data.ksnd_enomem_conns)); | |
2280 | LASSERT (list_empty (&ksocknal_data.ksnd_zombie_conns)); | |
2281 | LASSERT (list_empty (&ksocknal_data.ksnd_connd_connreqs)); | |
2282 | LASSERT (list_empty (&ksocknal_data.ksnd_connd_routes)); | |
2283 | ||
2284 | if (ksocknal_data.ksnd_sched_info != NULL) { | |
2285 | cfs_percpt_for_each(info, i, | |
2286 | ksocknal_data.ksnd_sched_info) { | |
2287 | if (info->ksi_scheds == NULL) | |
2288 | continue; | |
2289 | ||
2290 | for (j = 0; j < info->ksi_nthreads_max; j++) { | |
2291 | ||
2292 | sched = &info->ksi_scheds[j]; | |
4b18c358 MN |
2293 | LASSERT(list_empty( |
2294 | &sched->kss_tx_conns)); | |
2295 | LASSERT(list_empty( | |
2296 | &sched->kss_rx_conns)); | |
2297 | LASSERT(list_empty( | |
2298 | &sched->kss_zombie_noop_txs)); | |
d7e09d03 PT |
2299 | LASSERT(sched->kss_nconns == 0); |
2300 | } | |
2301 | } | |
2302 | } | |
2303 | ||
2304 | /* flag threads to terminate; wake and wait for them to die */ | |
2305 | ksocknal_data.ksnd_shuttingdown = 1; | |
2306 | wake_up_all(&ksocknal_data.ksnd_connd_waitq); | |
2307 | wake_up_all(&ksocknal_data.ksnd_reaper_waitq); | |
2308 | ||
2309 | if (ksocknal_data.ksnd_sched_info != NULL) { | |
2310 | cfs_percpt_for_each(info, i, | |
2311 | ksocknal_data.ksnd_sched_info) { | |
2312 | if (info->ksi_scheds == NULL) | |
2313 | continue; | |
2314 | ||
2315 | for (j = 0; j < info->ksi_nthreads_max; j++) { | |
2316 | sched = &info->ksi_scheds[j]; | |
2317 | wake_up_all(&sched->kss_waitq); | |
2318 | } | |
2319 | } | |
2320 | } | |
2321 | ||
2322 | i = 4; | |
2323 | read_lock(&ksocknal_data.ksnd_global_lock); | |
2324 | while (ksocknal_data.ksnd_nthreads != 0) { | |
2325 | i++; | |
2326 | CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */ | |
2327 | "waiting for %d threads to terminate\n", | |
2328 | ksocknal_data.ksnd_nthreads); | |
2329 | read_unlock(&ksocknal_data.ksnd_global_lock); | |
d3caf4d5 PT |
2330 | set_current_state(TASK_UNINTERRUPTIBLE); |
2331 | schedule_timeout(cfs_time_seconds(1)); | |
d7e09d03 PT |
2332 | read_lock(&ksocknal_data.ksnd_global_lock); |
2333 | } | |
2334 | read_unlock(&ksocknal_data.ksnd_global_lock); | |
2335 | ||
2336 | ksocknal_free_buffers(); | |
2337 | ||
2338 | ksocknal_data.ksnd_init = SOCKNAL_INIT_NOTHING; | |
2339 | break; | |
2340 | } | |
2341 | ||
2342 | CDEBUG(D_MALLOC, "after NAL cleanup: kmem %d\n", | |
2343 | atomic_read (&libcfs_kmemory)); | |
2344 | ||
2345 | module_put(THIS_MODULE); | |
2346 | } | |
2347 | ||
0b913529 | 2348 | static __u64 |
d7e09d03 PT |
2349 | ksocknal_new_incarnation (void) |
2350 | { | |
d7e09d03 PT |
2351 | |
2352 | /* The incarnation number is the time this module loaded and it | |
11dd2a97 TR |
2353 | * identifies this particular instance of the socknal. |
2354 | */ | |
2355 | return ktime_get_ns(); | |
d7e09d03 PT |
2356 | } |
2357 | ||
0b913529 | 2358 | static int |
d7e09d03 PT |
2359 | ksocknal_base_startup(void) |
2360 | { | |
2361 | struct ksock_sched_info *info; | |
2362 | int rc; | |
2363 | int i; | |
2364 | ||
2365 | LASSERT (ksocknal_data.ksnd_init == SOCKNAL_INIT_NOTHING); | |
2366 | LASSERT (ksocknal_data.ksnd_nnets == 0); | |
2367 | ||
2368 | memset (&ksocknal_data, 0, sizeof (ksocknal_data)); /* zero pointers */ | |
2369 | ||
2370 | ksocknal_data.ksnd_peer_hash_size = SOCKNAL_PEER_HASH_SIZE; | |
2371 | LIBCFS_ALLOC (ksocknal_data.ksnd_peers, | |
2372 | sizeof (struct list_head) * | |
2373 | ksocknal_data.ksnd_peer_hash_size); | |
2374 | if (ksocknal_data.ksnd_peers == NULL) | |
2375 | return -ENOMEM; | |
2376 | ||
2377 | for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) | |
2378 | INIT_LIST_HEAD(&ksocknal_data.ksnd_peers[i]); | |
2379 | ||
2380 | rwlock_init(&ksocknal_data.ksnd_global_lock); | |
2381 | INIT_LIST_HEAD(&ksocknal_data.ksnd_nets); | |
2382 | ||
2383 | spin_lock_init(&ksocknal_data.ksnd_reaper_lock); | |
2384 | INIT_LIST_HEAD (&ksocknal_data.ksnd_enomem_conns); | |
2385 | INIT_LIST_HEAD (&ksocknal_data.ksnd_zombie_conns); | |
2386 | INIT_LIST_HEAD (&ksocknal_data.ksnd_deathrow_conns); | |
2387 | init_waitqueue_head(&ksocknal_data.ksnd_reaper_waitq); | |
2388 | ||
2389 | spin_lock_init(&ksocknal_data.ksnd_connd_lock); | |
2390 | INIT_LIST_HEAD (&ksocknal_data.ksnd_connd_connreqs); | |
2391 | INIT_LIST_HEAD (&ksocknal_data.ksnd_connd_routes); | |
2392 | init_waitqueue_head(&ksocknal_data.ksnd_connd_waitq); | |
2393 | ||
2394 | spin_lock_init(&ksocknal_data.ksnd_tx_lock); | |
2395 | INIT_LIST_HEAD (&ksocknal_data.ksnd_idle_noop_txs); | |
2396 | ||
2397 | /* NB memset above zeros whole of ksocknal_data */ | |
2398 | ||
2399 | /* flag lists/ptrs/locks initialised */ | |
2400 | ksocknal_data.ksnd_init = SOCKNAL_INIT_DATA; | |
2401 | try_module_get(THIS_MODULE); | |
2402 | ||
2403 | ksocknal_data.ksnd_sched_info = cfs_percpt_alloc(lnet_cpt_table(), | |
2404 | sizeof(*info)); | |
2405 | if (ksocknal_data.ksnd_sched_info == NULL) | |
2406 | goto failed; | |
2407 | ||
2408 | cfs_percpt_for_each(info, i, ksocknal_data.ksnd_sched_info) { | |
2409 | ksock_sched_t *sched; | |
2410 | int nthrs; | |
2411 | ||
2412 | nthrs = cfs_cpt_weight(lnet_cpt_table(), i); | |
2413 | if (*ksocknal_tunables.ksnd_nscheds > 0) { | |
2414 | nthrs = min(nthrs, *ksocknal_tunables.ksnd_nscheds); | |
2415 | } else { | |
2416 | /* max to half of CPUs, assume another half should be | |
2417 | * reserved for upper layer modules */ | |
2418 | nthrs = min(max(SOCKNAL_NSCHEDS, nthrs >> 1), nthrs); | |
2419 | } | |
2420 | ||
2421 | info->ksi_nthreads_max = nthrs; | |
2422 | info->ksi_cpt = i; | |
2423 | ||
2424 | LIBCFS_CPT_ALLOC(info->ksi_scheds, lnet_cpt_table(), i, | |
2425 | info->ksi_nthreads_max * sizeof(*sched)); | |
2426 | if (info->ksi_scheds == NULL) | |
2427 | goto failed; | |
2428 | ||
2429 | for (; nthrs > 0; nthrs--) { | |
2430 | sched = &info->ksi_scheds[nthrs - 1]; | |
2431 | ||
2432 | sched->kss_info = info; | |
2433 | spin_lock_init(&sched->kss_lock); | |
2434 | INIT_LIST_HEAD(&sched->kss_rx_conns); | |
2435 | INIT_LIST_HEAD(&sched->kss_tx_conns); | |
2436 | INIT_LIST_HEAD(&sched->kss_zombie_noop_txs); | |
2437 | init_waitqueue_head(&sched->kss_waitq); | |
2438 | } | |
2439 | } | |
2440 | ||
2441 | ksocknal_data.ksnd_connd_starting = 0; | |
2442 | ksocknal_data.ksnd_connd_failed_stamp = 0; | |
7264b8a5 | 2443 | ksocknal_data.ksnd_connd_starting_stamp = get_seconds(); |
d7e09d03 PT |
2444 | /* must have at least 2 connds to remain responsive to accepts while |
2445 | * connecting */ | |
2446 | if (*ksocknal_tunables.ksnd_nconnds < SOCKNAL_CONND_RESV + 1) | |
2447 | *ksocknal_tunables.ksnd_nconnds = SOCKNAL_CONND_RESV + 1; | |
2448 | ||
2449 | if (*ksocknal_tunables.ksnd_nconnds_max < | |
2450 | *ksocknal_tunables.ksnd_nconnds) { | |
2451 | ksocknal_tunables.ksnd_nconnds_max = | |
2452 | ksocknal_tunables.ksnd_nconnds; | |
2453 | } | |
2454 | ||
2455 | for (i = 0; i < *ksocknal_tunables.ksnd_nconnds; i++) { | |
2456 | char name[16]; | |
2457 | spin_lock_bh(&ksocknal_data.ksnd_connd_lock); | |
2458 | ksocknal_data.ksnd_connd_starting++; | |
2459 | spin_unlock_bh(&ksocknal_data.ksnd_connd_lock); | |
2460 | ||
2461 | ||
2462 | snprintf(name, sizeof(name), "socknal_cd%02d", i); | |
2463 | rc = ksocknal_thread_start(ksocknal_connd, | |
2464 | (void *)((ulong_ptr_t)i), name); | |
2465 | if (rc != 0) { | |
2466 | spin_lock_bh(&ksocknal_data.ksnd_connd_lock); | |
2467 | ksocknal_data.ksnd_connd_starting--; | |
2468 | spin_unlock_bh(&ksocknal_data.ksnd_connd_lock); | |
2469 | CERROR("Can't spawn socknal connd: %d\n", rc); | |
2470 | goto failed; | |
2471 | } | |
2472 | } | |
2473 | ||
2474 | rc = ksocknal_thread_start(ksocknal_reaper, NULL, "socknal_reaper"); | |
2475 | if (rc != 0) { | |
2476 | CERROR ("Can't spawn socknal reaper: %d\n", rc); | |
2477 | goto failed; | |
2478 | } | |
2479 | ||
2480 | /* flag everything initialised */ | |
2481 | ksocknal_data.ksnd_init = SOCKNAL_INIT_ALL; | |
2482 | ||
2483 | return 0; | |
2484 | ||
2485 | failed: | |
2486 | ksocknal_base_shutdown(); | |
2487 | return -ENETDOWN; | |
2488 | } | |
2489 | ||
0b913529 | 2490 | static void |
d7e09d03 PT |
2491 | ksocknal_debug_peerhash (lnet_ni_t *ni) |
2492 | { | |
2493 | ksock_peer_t *peer = NULL; | |
2494 | struct list_head *tmp; | |
2495 | int i; | |
2496 | ||
2497 | read_lock(&ksocknal_data.ksnd_global_lock); | |
2498 | ||
2499 | for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) { | |
2500 | list_for_each (tmp, &ksocknal_data.ksnd_peers[i]) { | |
2501 | peer = list_entry (tmp, ksock_peer_t, ksnp_list); | |
2502 | ||
a10f33e9 MN |
2503 | if (peer->ksnp_ni == ni) |
2504 | break; | |
d7e09d03 PT |
2505 | |
2506 | peer = NULL; | |
2507 | } | |
2508 | } | |
2509 | ||
2510 | if (peer != NULL) { | |
2511 | ksock_route_t *route; | |
2512 | ksock_conn_t *conn; | |
2513 | ||
2514 | CWARN ("Active peer on shutdown: %s, ref %d, scnt %d, " | |
b0f5aad5 | 2515 | "closing %d, accepting %d, err %d, zcookie %llu, " |
d7e09d03 PT |
2516 | "txq %d, zc_req %d\n", libcfs_id2str(peer->ksnp_id), |
2517 | atomic_read(&peer->ksnp_refcount), | |
2518 | peer->ksnp_sharecount, peer->ksnp_closing, | |
2519 | peer->ksnp_accepting, peer->ksnp_error, | |
2520 | peer->ksnp_zc_next_cookie, | |
2521 | !list_empty(&peer->ksnp_tx_queue), | |
2522 | !list_empty(&peer->ksnp_zc_req_list)); | |
2523 | ||
2524 | list_for_each (tmp, &peer->ksnp_routes) { | |
2525 | route = list_entry(tmp, ksock_route_t, ksnr_list); | |
2526 | CWARN ("Route: ref %d, schd %d, conn %d, cnted %d, " | |
2527 | "del %d\n", atomic_read(&route->ksnr_refcount), | |
2528 | route->ksnr_scheduled, route->ksnr_connecting, | |
2529 | route->ksnr_connected, route->ksnr_deleted); | |
2530 | } | |
2531 | ||
2532 | list_for_each (tmp, &peer->ksnp_conns) { | |
2533 | conn = list_entry(tmp, ksock_conn_t, ksnc_list); | |
2534 | CWARN ("Conn: ref %d, sref %d, t %d, c %d\n", | |
2535 | atomic_read(&conn->ksnc_conn_refcount), | |
2536 | atomic_read(&conn->ksnc_sock_refcount), | |
2537 | conn->ksnc_type, conn->ksnc_closing); | |
2538 | } | |
2539 | } | |
2540 | ||
2541 | read_unlock(&ksocknal_data.ksnd_global_lock); | |
2542 | return; | |
2543 | } | |
2544 | ||
2545 | void | |
2546 | ksocknal_shutdown (lnet_ni_t *ni) | |
2547 | { | |
2548 | ksock_net_t *net = ni->ni_data; | |
2549 | int i; | |
2550 | lnet_process_id_t anyid = {0}; | |
2551 | ||
2552 | anyid.nid = LNET_NID_ANY; | |
2553 | anyid.pid = LNET_PID_ANY; | |
2554 | ||
2555 | LASSERT(ksocknal_data.ksnd_init == SOCKNAL_INIT_ALL); | |
2556 | LASSERT(ksocknal_data.ksnd_nnets > 0); | |
2557 | ||
2558 | spin_lock_bh(&net->ksnn_lock); | |
2559 | net->ksnn_shutdown = 1; /* prevent new peers */ | |
2560 | spin_unlock_bh(&net->ksnn_lock); | |
2561 | ||
2562 | /* Delete all peers */ | |
2563 | ksocknal_del_peer(ni, anyid, 0); | |
2564 | ||
2565 | /* Wait for all peer state to clean up */ | |
2566 | i = 2; | |
2567 | spin_lock_bh(&net->ksnn_lock); | |
2568 | while (net->ksnn_npeers != 0) { | |
2569 | spin_unlock_bh(&net->ksnn_lock); | |
2570 | ||
2571 | i++; | |
2572 | CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */ | |
2573 | "waiting for %d peers to disconnect\n", | |
2574 | net->ksnn_npeers); | |
d3caf4d5 PT |
2575 | set_current_state(TASK_UNINTERRUPTIBLE); |
2576 | schedule_timeout(cfs_time_seconds(1)); | |
d7e09d03 PT |
2577 | |
2578 | ksocknal_debug_peerhash(ni); | |
2579 | ||
2580 | spin_lock_bh(&net->ksnn_lock); | |
2581 | } | |
2582 | spin_unlock_bh(&net->ksnn_lock); | |
2583 | ||
2584 | for (i = 0; i < net->ksnn_ninterfaces; i++) { | |
2585 | LASSERT (net->ksnn_interfaces[i].ksni_npeers == 0); | |
2586 | LASSERT (net->ksnn_interfaces[i].ksni_nroutes == 0); | |
2587 | } | |
2588 | ||
2589 | list_del(&net->ksnn_list); | |
2590 | LIBCFS_FREE(net, sizeof(*net)); | |
2591 | ||
2592 | ksocknal_data.ksnd_nnets--; | |
2593 | if (ksocknal_data.ksnd_nnets == 0) | |
2594 | ksocknal_base_shutdown(); | |
2595 | } | |
2596 | ||
0b913529 | 2597 | static int |
d7e09d03 PT |
2598 | ksocknal_enumerate_interfaces(ksock_net_t *net) |
2599 | { | |
2600 | char **names; | |
2601 | int i; | |
2602 | int j; | |
2603 | int rc; | |
2604 | int n; | |
2605 | ||
2606 | n = libcfs_ipif_enumerate(&names); | |
2607 | if (n <= 0) { | |
2608 | CERROR("Can't enumerate interfaces: %d\n", n); | |
2609 | return n; | |
2610 | } | |
2611 | ||
2612 | for (i = j = 0; i < n; i++) { | |
2613 | int up; | |
2614 | __u32 ip; | |
2615 | __u32 mask; | |
2616 | ||
2617 | if (!strcmp(names[i], "lo")) /* skip the loopback IF */ | |
2618 | continue; | |
2619 | ||
2620 | rc = libcfs_ipif_query(names[i], &up, &ip, &mask); | |
2621 | if (rc != 0) { | |
2622 | CWARN("Can't get interface %s info: %d\n", | |
2623 | names[i], rc); | |
2624 | continue; | |
2625 | } | |
2626 | ||
2627 | if (!up) { | |
2628 | CWARN("Ignoring interface %s (down)\n", | |
2629 | names[i]); | |
2630 | continue; | |
2631 | } | |
2632 | ||
2633 | if (j == LNET_MAX_INTERFACES) { | |
2634 | CWARN("Ignoring interface %s (too many interfaces)\n", | |
2635 | names[i]); | |
2636 | continue; | |
2637 | } | |
2638 | ||
2639 | net->ksnn_interfaces[j].ksni_ipaddr = ip; | |
2640 | net->ksnn_interfaces[j].ksni_netmask = mask; | |
2641 | strncpy(&net->ksnn_interfaces[j].ksni_name[0], | |
2642 | names[i], IFNAMSIZ); | |
2643 | j++; | |
2644 | } | |
2645 | ||
2646 | libcfs_ipif_free_enumeration(names, n); | |
2647 | ||
2648 | if (j == 0) | |
2649 | CERROR("Can't find any usable interfaces\n"); | |
2650 | ||
2651 | return j; | |
2652 | } | |
2653 | ||
0b913529 | 2654 | static int |
d7e09d03 PT |
2655 | ksocknal_search_new_ipif(ksock_net_t *net) |
2656 | { | |
2657 | int new_ipif = 0; | |
2658 | int i; | |
2659 | ||
2660 | for (i = 0; i < net->ksnn_ninterfaces; i++) { | |
2661 | char *ifnam = &net->ksnn_interfaces[i].ksni_name[0]; | |
2662 | char *colon = strchr(ifnam, ':'); | |
2663 | int found = 0; | |
2664 | ksock_net_t *tmp; | |
2665 | int j; | |
2666 | ||
2667 | if (colon != NULL) /* ignore alias device */ | |
2668 | *colon = 0; | |
2669 | ||
2670 | list_for_each_entry(tmp, &ksocknal_data.ksnd_nets, | |
2671 | ksnn_list) { | |
2672 | for (j = 0; !found && j < tmp->ksnn_ninterfaces; j++) { | |
4b18c358 MN |
2673 | char *ifnam2 = |
2674 | &tmp->ksnn_interfaces[j].ksni_name[0]; | |
d7e09d03 PT |
2675 | char *colon2 = strchr(ifnam2, ':'); |
2676 | ||
2677 | if (colon2 != NULL) | |
2678 | *colon2 = 0; | |
2679 | ||
2680 | found = strcmp(ifnam, ifnam2) == 0; | |
2681 | if (colon2 != NULL) | |
2682 | *colon2 = ':'; | |
2683 | } | |
2684 | if (found) | |
2685 | break; | |
2686 | } | |
2687 | ||
2688 | new_ipif += !found; | |
2689 | if (colon != NULL) | |
2690 | *colon = ':'; | |
2691 | } | |
2692 | ||
2693 | return new_ipif; | |
2694 | } | |
2695 | ||
0b913529 | 2696 | static int |
d7e09d03 PT |
2697 | ksocknal_start_schedulers(struct ksock_sched_info *info) |
2698 | { | |
2699 | int nthrs; | |
2700 | int rc = 0; | |
2701 | int i; | |
2702 | ||
2703 | if (info->ksi_nthreads == 0) { | |
2704 | if (*ksocknal_tunables.ksnd_nscheds > 0) { | |
2705 | nthrs = info->ksi_nthreads_max; | |
2706 | } else { | |
2707 | nthrs = cfs_cpt_weight(lnet_cpt_table(), | |
2708 | info->ksi_cpt); | |
2709 | nthrs = min(max(SOCKNAL_NSCHEDS, nthrs >> 1), nthrs); | |
2710 | nthrs = min(SOCKNAL_NSCHEDS_HIGH, nthrs); | |
2711 | } | |
2712 | nthrs = min(nthrs, info->ksi_nthreads_max); | |
2713 | } else { | |
2714 | LASSERT(info->ksi_nthreads <= info->ksi_nthreads_max); | |
2715 | /* increase two threads if there is new interface */ | |
2716 | nthrs = min(2, info->ksi_nthreads_max - info->ksi_nthreads); | |
2717 | } | |
2718 | ||
2719 | for (i = 0; i < nthrs; i++) { | |
2720 | long id; | |
2721 | char name[20]; | |
2722 | ksock_sched_t *sched; | |
2723 | id = KSOCK_THREAD_ID(info->ksi_cpt, info->ksi_nthreads + i); | |
2724 | sched = &info->ksi_scheds[KSOCK_THREAD_SID(id)]; | |
2725 | snprintf(name, sizeof(name), "socknal_sd%02d_%02d", | |
2726 | info->ksi_cpt, (int)(sched - &info->ksi_scheds[0])); | |
2727 | ||
2728 | rc = ksocknal_thread_start(ksocknal_scheduler, | |
2729 | (void *)id, name); | |
2730 | if (rc == 0) | |
2731 | continue; | |
2732 | ||
2733 | CERROR("Can't spawn thread %d for scheduler[%d]: %d\n", | |
2734 | info->ksi_cpt, info->ksi_nthreads + i, rc); | |
2735 | break; | |
2736 | } | |
2737 | ||
2738 | info->ksi_nthreads += i; | |
2739 | return rc; | |
2740 | } | |
2741 | ||
0b913529 | 2742 | static int |
d7e09d03 PT |
2743 | ksocknal_net_start_threads(ksock_net_t *net, __u32 *cpts, int ncpts) |
2744 | { | |
2745 | int newif = ksocknal_search_new_ipif(net); | |
2746 | int rc; | |
2747 | int i; | |
2748 | ||
2749 | LASSERT(ncpts > 0 && ncpts <= cfs_cpt_number(lnet_cpt_table())); | |
2750 | ||
2751 | for (i = 0; i < ncpts; i++) { | |
2752 | struct ksock_sched_info *info; | |
2753 | int cpt = (cpts == NULL) ? i : cpts[i]; | |
2754 | ||
2755 | LASSERT(cpt < cfs_cpt_number(lnet_cpt_table())); | |
2756 | info = ksocknal_data.ksnd_sched_info[cpt]; | |
2757 | ||
2758 | if (!newif && info->ksi_nthreads > 0) | |
2759 | continue; | |
2760 | ||
2761 | rc = ksocknal_start_schedulers(info); | |
2762 | if (rc != 0) | |
2763 | return rc; | |
2764 | } | |
2765 | return 0; | |
2766 | } | |
2767 | ||
2768 | int | |
2769 | ksocknal_startup (lnet_ni_t *ni) | |
2770 | { | |
2771 | ksock_net_t *net; | |
2772 | int rc; | |
2773 | int i; | |
2774 | ||
2775 | LASSERT (ni->ni_lnd == &the_ksocklnd); | |
2776 | ||
2777 | if (ksocknal_data.ksnd_init == SOCKNAL_INIT_NOTHING) { | |
2778 | rc = ksocknal_base_startup(); | |
2779 | if (rc != 0) | |
2780 | return rc; | |
2781 | } | |
2782 | ||
2783 | LIBCFS_ALLOC(net, sizeof(*net)); | |
2784 | if (net == NULL) | |
2785 | goto fail_0; | |
2786 | ||
2787 | spin_lock_init(&net->ksnn_lock); | |
2788 | net->ksnn_incarnation = ksocknal_new_incarnation(); | |
2789 | ni->ni_data = net; | |
2790 | ni->ni_peertimeout = *ksocknal_tunables.ksnd_peertimeout; | |
2791 | ni->ni_maxtxcredits = *ksocknal_tunables.ksnd_credits; | |
2792 | ni->ni_peertxcredits = *ksocknal_tunables.ksnd_peertxcredits; | |
2793 | ni->ni_peerrtrcredits = *ksocknal_tunables.ksnd_peerrtrcredits; | |
2794 | ||
2795 | if (ni->ni_interfaces[0] == NULL) { | |
2796 | rc = ksocknal_enumerate_interfaces(net); | |
2797 | if (rc <= 0) | |
2798 | goto fail_1; | |
2799 | ||
2800 | net->ksnn_ninterfaces = 1; | |
2801 | } else { | |
2802 | for (i = 0; i < LNET_MAX_INTERFACES; i++) { | |
2803 | int up; | |
2804 | ||
2805 | if (ni->ni_interfaces[i] == NULL) | |
2806 | break; | |
2807 | ||
2808 | rc = libcfs_ipif_query( | |
2809 | ni->ni_interfaces[i], &up, | |
2810 | &net->ksnn_interfaces[i].ksni_ipaddr, | |
2811 | &net->ksnn_interfaces[i].ksni_netmask); | |
2812 | ||
2813 | if (rc != 0) { | |
2814 | CERROR("Can't get interface %s info: %d\n", | |
2815 | ni->ni_interfaces[i], rc); | |
2816 | goto fail_1; | |
2817 | } | |
2818 | ||
2819 | if (!up) { | |
2820 | CERROR("Interface %s is down\n", | |
2821 | ni->ni_interfaces[i]); | |
2822 | goto fail_1; | |
2823 | } | |
2824 | ||
2825 | strncpy(&net->ksnn_interfaces[i].ksni_name[0], | |
2826 | ni->ni_interfaces[i], IFNAMSIZ); | |
2827 | } | |
2828 | net->ksnn_ninterfaces = i; | |
2829 | } | |
2830 | ||
2831 | /* call it before add it to ksocknal_data.ksnd_nets */ | |
2832 | rc = ksocknal_net_start_threads(net, ni->ni_cpts, ni->ni_ncpts); | |
2833 | if (rc != 0) | |
2834 | goto fail_1; | |
2835 | ||
2836 | ni->ni_nid = LNET_MKNID(LNET_NIDNET(ni->ni_nid), | |
2837 | net->ksnn_interfaces[0].ksni_ipaddr); | |
2838 | list_add(&net->ksnn_list, &ksocknal_data.ksnd_nets); | |
2839 | ||
2840 | ksocknal_data.ksnd_nnets++; | |
2841 | ||
2842 | return 0; | |
2843 | ||
2844 | fail_1: | |
2845 | LIBCFS_FREE(net, sizeof(*net)); | |
2846 | fail_0: | |
2847 | if (ksocknal_data.ksnd_nnets == 0) | |
2848 | ksocknal_base_shutdown(); | |
2849 | ||
2850 | return -ENETDOWN; | |
2851 | } | |
2852 | ||
2853 | ||
0b913529 | 2854 | static void __exit |
d7e09d03 PT |
2855 | ksocknal_module_fini (void) |
2856 | { | |
2857 | lnet_unregister_lnd(&the_ksocklnd); | |
d7e09d03 PT |
2858 | } |
2859 | ||
0b913529 | 2860 | static int __init |
d7e09d03 PT |
2861 | ksocknal_module_init (void) |
2862 | { | |
2863 | int rc; | |
2864 | ||
2865 | /* check ksnr_connected/connecting field large enough */ | |
2866 | CLASSERT (SOCKLND_CONN_NTYPES <= 4); | |
2867 | CLASSERT (SOCKLND_CONN_ACK == SOCKLND_CONN_BULK_IN); | |
2868 | ||
2869 | /* initialize the_ksocklnd */ | |
2870 | the_ksocklnd.lnd_type = SOCKLND; | |
2871 | the_ksocklnd.lnd_startup = ksocknal_startup; | |
2872 | the_ksocklnd.lnd_shutdown = ksocknal_shutdown; | |
2873 | the_ksocklnd.lnd_ctl = ksocknal_ctl; | |
2874 | the_ksocklnd.lnd_send = ksocknal_send; | |
2875 | the_ksocklnd.lnd_recv = ksocknal_recv; | |
2876 | the_ksocklnd.lnd_notify = ksocknal_notify; | |
2877 | the_ksocklnd.lnd_query = ksocknal_query; | |
2878 | the_ksocklnd.lnd_accept = ksocknal_accept; | |
2879 | ||
2880 | rc = ksocknal_tunables_init(); | |
2881 | if (rc != 0) | |
2882 | return rc; | |
2883 | ||
2884 | lnet_register_lnd(&the_ksocklnd); | |
2885 | ||
2886 | return 0; | |
2887 | } | |
2888 | ||
2889 | MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>"); | |
2890 | MODULE_DESCRIPTION("Kernel TCP Socket LND v3.0.0"); | |
2891 | MODULE_LICENSE("GPL"); | |
6960736c | 2892 | MODULE_VERSION("3.0.0"); |
d7e09d03 | 2893 | |
6960736c GKH |
2894 | module_init(ksocknal_module_init); |
2895 | module_exit(ksocknal_module_fini); |