Commit | Line | Data |
---|---|---|
d7e09d03 PT |
1 | /* |
2 | * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. | |
3 | * | |
1dc563a6 | 4 | * Copyright (c) 2011, 2015, Intel Corporation. |
d7e09d03 PT |
5 | * |
6 | * This file is part of Portals | |
7 | * http://sourceforge.net/projects/sandiaportals/ | |
8 | * | |
9 | * Portals is free software; you can redistribute it and/or | |
10 | * modify it under the terms of version 2 of the GNU General Public | |
11 | * License as published by the Free Software Foundation. | |
12 | * | |
13 | * Portals is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
d7e09d03 PT |
18 | */ |
19 | ||
20 | #define DEBUG_SUBSYSTEM S_LNET | |
9fdaf8c0 | 21 | #include "../../include/linux/lnet/lib-lnet.h" |
d7e09d03 | 22 | |
d7e09d03 PT |
23 | #define LNET_NRB_TINY_MIN 512 /* min value for each CPT */ |
24 | #define LNET_NRB_TINY (LNET_NRB_TINY_MIN * 4) | |
25 | #define LNET_NRB_SMALL_MIN 4096 /* min value for each CPT */ | |
26 | #define LNET_NRB_SMALL (LNET_NRB_SMALL_MIN * 4) | |
86ef6250 | 27 | #define LNET_NRB_SMALL_PAGES 1 |
d7e09d03 PT |
28 | #define LNET_NRB_LARGE_MIN 256 /* min value for each CPT */ |
29 | #define LNET_NRB_LARGE (LNET_NRB_LARGE_MIN * 4) | |
86ef6250 AS |
30 | #define LNET_NRB_LARGE_PAGES ((LNET_MTU + PAGE_CACHE_SIZE - 1) >> \ |
31 | PAGE_CACHE_SHIFT) | |
d7e09d03 PT |
32 | |
33 | static char *forwarding = ""; | |
8cc7b4b9 PT |
34 | module_param(forwarding, charp, 0444); |
35 | MODULE_PARM_DESC(forwarding, "Explicitly enable/disable forwarding between networks"); | |
d7e09d03 PT |
36 | |
37 | static int tiny_router_buffers; | |
8cc7b4b9 PT |
38 | module_param(tiny_router_buffers, int, 0444); |
39 | MODULE_PARM_DESC(tiny_router_buffers, "# of 0 payload messages to buffer in the router"); | |
d7e09d03 | 40 | static int small_router_buffers; |
8cc7b4b9 PT |
41 | module_param(small_router_buffers, int, 0444); |
42 | MODULE_PARM_DESC(small_router_buffers, "# of small (1 page) messages to buffer in the router"); | |
d7e09d03 | 43 | static int large_router_buffers; |
8cc7b4b9 PT |
44 | module_param(large_router_buffers, int, 0444); |
45 | MODULE_PARM_DESC(large_router_buffers, "# of large messages to buffer in the router"); | |
f96d1d7e | 46 | static int peer_buffer_credits; |
8cc7b4b9 PT |
47 | module_param(peer_buffer_credits, int, 0444); |
48 | MODULE_PARM_DESC(peer_buffer_credits, "# router buffer credits per peer"); | |
d7e09d03 PT |
49 | |
50 | static int auto_down = 1; | |
8cc7b4b9 PT |
51 | module_param(auto_down, int, 0444); |
52 | MODULE_PARM_DESC(auto_down, "Automatically mark peers down on comms error"); | |
d7e09d03 PT |
53 | |
54 | int | |
55 | lnet_peer_buffer_credits(lnet_ni_t *ni) | |
56 | { | |
57 | /* NI option overrides LNet default */ | |
58 | if (ni->ni_peerrtrcredits > 0) | |
59 | return ni->ni_peerrtrcredits; | |
60 | if (peer_buffer_credits > 0) | |
61 | return peer_buffer_credits; | |
62 | ||
4420cfd3 JS |
63 | /* |
64 | * As an approximation, allow this peer the same number of router | |
65 | * buffers as it is allowed outstanding sends | |
66 | */ | |
d7e09d03 PT |
67 | return ni->ni_peertxcredits; |
68 | } | |
69 | ||
70 | /* forward ref's */ | |
71 | static int lnet_router_checker(void *); | |
d7e09d03 | 72 | |
f96d1d7e | 73 | static int check_routers_before_use; |
8cc7b4b9 PT |
74 | module_param(check_routers_before_use, int, 0444); |
75 | MODULE_PARM_DESC(check_routers_before_use, "Assume routers are down and ping them before use"); | |
d7e09d03 | 76 | |
af3fa7c7 | 77 | int avoid_asym_router_failure = 1; |
8cc7b4b9 PT |
78 | module_param(avoid_asym_router_failure, int, 0644); |
79 | MODULE_PARM_DESC(avoid_asym_router_failure, "Avoid asymmetrical router failures (0 to disable)"); | |
d7e09d03 PT |
80 | |
81 | static int dead_router_check_interval = 60; | |
8cc7b4b9 PT |
82 | module_param(dead_router_check_interval, int, 0644); |
83 | MODULE_PARM_DESC(dead_router_check_interval, "Seconds between dead router health checks (<= 0 to disable)"); | |
d7e09d03 PT |
84 | |
85 | static int live_router_check_interval = 60; | |
8cc7b4b9 PT |
86 | module_param(live_router_check_interval, int, 0644); |
87 | MODULE_PARM_DESC(live_router_check_interval, "Seconds between live router health checks (<= 0 to disable)"); | |
d7e09d03 PT |
88 | |
89 | static int router_ping_timeout = 50; | |
8cc7b4b9 PT |
90 | module_param(router_ping_timeout, int, 0644); |
91 | MODULE_PARM_DESC(router_ping_timeout, "Seconds to wait for the reply to a router health query"); | |
d7e09d03 PT |
92 | |
93 | int | |
94 | lnet_peers_start_down(void) | |
95 | { | |
96 | return check_routers_before_use; | |
97 | } | |
98 | ||
99 | void | |
e6157b1b RG |
100 | lnet_notify_locked(lnet_peer_t *lp, int notifylnd, int alive, |
101 | unsigned long when) | |
d7e09d03 | 102 | { |
699503bc | 103 | if (time_before(when, lp->lp_timestamp)) { /* out of date information */ |
d7e09d03 PT |
104 | CDEBUG(D_NET, "Out of date\n"); |
105 | return; | |
106 | } | |
107 | ||
108 | lp->lp_timestamp = when; /* update timestamp */ | |
109 | lp->lp_ping_deadline = 0; /* disable ping timeout */ | |
110 | ||
5fd88337 | 111 | if (lp->lp_alive_count && /* got old news */ |
d7e09d03 PT |
112 | (!lp->lp_alive) == (!alive)) { /* new date for old news */ |
113 | CDEBUG(D_NET, "Old news\n"); | |
114 | return; | |
115 | } | |
116 | ||
117 | /* Flag that notification is outstanding */ | |
118 | ||
119 | lp->lp_alive_count++; | |
120 | lp->lp_alive = !(!alive); /* 1 bit! */ | |
121 | lp->lp_notify = 1; | |
122 | lp->lp_notifylnd |= notifylnd; | |
123 | if (lp->lp_alive) | |
124 | lp->lp_ping_feats = LNET_PING_FEAT_INVAL; /* reset */ | |
125 | ||
126 | CDEBUG(D_NET, "set %s %d\n", libcfs_nid2str(lp->lp_nid), alive); | |
127 | } | |
128 | ||
24008203 | 129 | static void |
d7e09d03 PT |
130 | lnet_ni_notify_locked(lnet_ni_t *ni, lnet_peer_t *lp) |
131 | { | |
7e7ab095 MS |
132 | int alive; |
133 | int notifylnd; | |
d7e09d03 | 134 | |
4420cfd3 JS |
135 | /* |
136 | * Notify only in 1 thread at any time to ensure ordered notification. | |
d7e09d03 | 137 | * NB individual events can be missed; the only guarantee is that you |
4420cfd3 JS |
138 | * always get the most recent news |
139 | */ | |
06ace26e | 140 | if (lp->lp_notifying || !ni) |
d7e09d03 PT |
141 | return; |
142 | ||
143 | lp->lp_notifying = 1; | |
144 | ||
145 | while (lp->lp_notify) { | |
7e7ab095 | 146 | alive = lp->lp_alive; |
d7e09d03 PT |
147 | notifylnd = lp->lp_notifylnd; |
148 | ||
149 | lp->lp_notifylnd = 0; | |
150 | lp->lp_notify = 0; | |
151 | ||
06ace26e | 152 | if (notifylnd && ni->ni_lnd->lnd_notify) { |
d7e09d03 PT |
153 | lnet_net_unlock(lp->lp_cpt); |
154 | ||
4420cfd3 JS |
155 | /* |
156 | * A new notification could happen now; I'll handle it | |
157 | * when control returns to me | |
158 | */ | |
0eee6778 | 159 | ni->ni_lnd->lnd_notify(ni, lp->lp_nid, alive); |
d7e09d03 PT |
160 | |
161 | lnet_net_lock(lp->lp_cpt); | |
162 | } | |
163 | } | |
164 | ||
165 | lp->lp_notifying = 0; | |
166 | } | |
167 | ||
d7e09d03 PT |
168 | static void |
169 | lnet_rtr_addref_locked(lnet_peer_t *lp) | |
170 | { | |
171 | LASSERT(lp->lp_refcount > 0); | |
172 | LASSERT(lp->lp_rtr_refcount >= 0); | |
173 | ||
174 | /* lnet_net_lock must be exclusively locked */ | |
175 | lp->lp_rtr_refcount++; | |
176 | if (lp->lp_rtr_refcount == 1) { | |
177 | struct list_head *pos; | |
178 | ||
179 | /* a simple insertion sort */ | |
180 | list_for_each_prev(pos, &the_lnet.ln_routers) { | |
181 | lnet_peer_t *rtr = list_entry(pos, lnet_peer_t, | |
c314c319 | 182 | lp_rtr_list); |
d7e09d03 PT |
183 | |
184 | if (rtr->lp_nid < lp->lp_nid) | |
185 | break; | |
186 | } | |
187 | ||
188 | list_add(&lp->lp_rtr_list, pos); | |
189 | /* addref for the_lnet.ln_routers */ | |
190 | lnet_peer_addref_locked(lp); | |
191 | the_lnet.ln_routers_version++; | |
192 | } | |
193 | } | |
194 | ||
195 | static void | |
196 | lnet_rtr_decref_locked(lnet_peer_t *lp) | |
197 | { | |
198 | LASSERT(lp->lp_refcount > 0); | |
199 | LASSERT(lp->lp_rtr_refcount > 0); | |
200 | ||
201 | /* lnet_net_lock must be exclusively locked */ | |
202 | lp->lp_rtr_refcount--; | |
5fd88337 | 203 | if (!lp->lp_rtr_refcount) { |
d7e09d03 PT |
204 | LASSERT(list_empty(&lp->lp_routes)); |
205 | ||
06ace26e | 206 | if (lp->lp_rcd) { |
d7e09d03 | 207 | list_add(&lp->lp_rcd->rcd_list, |
c314c319 | 208 | &the_lnet.ln_rcd_deathrow); |
d7e09d03 PT |
209 | lp->lp_rcd = NULL; |
210 | } | |
211 | ||
212 | list_del(&lp->lp_rtr_list); | |
213 | /* decref for the_lnet.ln_routers */ | |
214 | lnet_peer_decref_locked(lp); | |
215 | the_lnet.ln_routers_version++; | |
216 | } | |
217 | } | |
218 | ||
219 | lnet_remotenet_t * | |
939af333 | 220 | lnet_find_net_locked(__u32 net) |
d7e09d03 | 221 | { |
7e7ab095 MS |
222 | lnet_remotenet_t *rnet; |
223 | struct list_head *tmp; | |
224 | struct list_head *rn_list; | |
d7e09d03 PT |
225 | |
226 | LASSERT(!the_lnet.ln_shutdown); | |
227 | ||
228 | rn_list = lnet_net2rnethash(net); | |
229 | list_for_each(tmp, rn_list) { | |
230 | rnet = list_entry(tmp, lnet_remotenet_t, lrn_list); | |
231 | ||
232 | if (rnet->lrn_net == net) | |
233 | return rnet; | |
234 | } | |
235 | return NULL; | |
236 | } | |
237 | ||
238 | static void lnet_shuffle_seed(void) | |
239 | { | |
f96d1d7e | 240 | static int seeded; |
80feb1ef | 241 | __u32 lnd_type, seed[2]; |
1f4fc343 | 242 | struct timespec64 ts; |
d7e09d03 PT |
243 | lnet_ni_t *ni; |
244 | struct list_head *tmp; | |
245 | ||
246 | if (seeded) | |
247 | return; | |
248 | ||
249 | cfs_get_random_bytes(seed, sizeof(seed)); | |
250 | ||
4420cfd3 JS |
251 | /* |
252 | * Nodes with small feet have little entropy | |
253 | * the NID for this node gives the most entropy in the low bits | |
254 | */ | |
d7e09d03 PT |
255 | list_for_each(tmp, &the_lnet.ln_nis) { |
256 | ni = list_entry(tmp, lnet_ni_t, ni_list); | |
257 | lnd_type = LNET_NETTYP(LNET_NIDNET(ni->ni_nid)); | |
258 | ||
259 | if (lnd_type != LOLND) | |
260 | seed[0] ^= (LNET_NIDADDR(ni->ni_nid) | lnd_type); | |
261 | } | |
262 | ||
1f4fc343 AB |
263 | ktime_get_ts64(&ts); |
264 | cfs_srand(ts.tv_sec ^ seed[0], ts.tv_nsec ^ seed[1]); | |
d7e09d03 | 265 | seeded = 1; |
d7e09d03 PT |
266 | } |
267 | ||
268 | /* NB expects LNET_LOCK held */ | |
24008203 | 269 | static void |
939af333 | 270 | lnet_add_route_to_rnet(lnet_remotenet_t *rnet, lnet_route_t *route) |
d7e09d03 | 271 | { |
7e7ab095 MS |
272 | unsigned int len = 0; |
273 | unsigned int offset = 0; | |
274 | struct list_head *e; | |
d7e09d03 PT |
275 | |
276 | lnet_shuffle_seed(); | |
277 | ||
939af333 | 278 | list_for_each(e, &rnet->lrn_routes) { |
d7e09d03 PT |
279 | len++; |
280 | } | |
281 | ||
282 | /* len+1 positions to add a new entry, also prevents division by 0 */ | |
283 | offset = cfs_rand() % (len + 1); | |
939af333 | 284 | list_for_each(e, &rnet->lrn_routes) { |
5fd88337 | 285 | if (!offset) |
d7e09d03 PT |
286 | break; |
287 | offset--; | |
288 | } | |
289 | list_add(&route->lr_list, e); | |
290 | list_add(&route->lr_gwlist, &route->lr_gateway->lp_routes); | |
291 | ||
292 | the_lnet.ln_remote_nets_version++; | |
293 | lnet_rtr_addref_locked(route->lr_gateway); | |
294 | } | |
295 | ||
296 | int | |
e75fb87f DO |
297 | lnet_add_route(__u32 net, unsigned int hops, lnet_nid_t gateway, |
298 | unsigned int priority) | |
d7e09d03 | 299 | { |
7e7ab095 MS |
300 | struct list_head *e; |
301 | lnet_remotenet_t *rnet; | |
302 | lnet_remotenet_t *rnet2; | |
303 | lnet_route_t *route; | |
304 | lnet_ni_t *ni; | |
305 | int add_route; | |
306 | int rc; | |
d7e09d03 | 307 | |
e75fb87f DO |
308 | CDEBUG(D_NET, "Add route: net %s hops %u priority %u gw %s\n", |
309 | libcfs_net2str(net), hops, priority, libcfs_nid2str(gateway)); | |
d7e09d03 PT |
310 | |
311 | if (gateway == LNET_NID_ANY || | |
312 | LNET_NETTYP(LNET_NIDNET(gateway)) == LOLND || | |
313 | net == LNET_NIDNET(LNET_NID_ANY) || | |
314 | LNET_NETTYP(net) == LOLND || | |
315 | LNET_NIDNET(gateway) == net || | |
316 | hops < 1 || hops > 255) | |
fbe7c6c7 | 317 | return -EINVAL; |
d7e09d03 PT |
318 | |
319 | if (lnet_islocalnet(net)) /* it's a local network */ | |
320 | return 0; /* ignore the route entry */ | |
321 | ||
322 | /* Assume net, route, all new */ | |
323 | LIBCFS_ALLOC(route, sizeof(*route)); | |
324 | LIBCFS_ALLOC(rnet, sizeof(*rnet)); | |
06ace26e | 325 | if (!route || !rnet) { |
d7e09d03 PT |
326 | CERROR("Out of memory creating route %s %d %s\n", |
327 | libcfs_net2str(net), hops, libcfs_nid2str(gateway)); | |
06ace26e | 328 | if (route) |
d7e09d03 | 329 | LIBCFS_FREE(route, sizeof(*route)); |
06ace26e | 330 | if (rnet) |
d7e09d03 PT |
331 | LIBCFS_FREE(rnet, sizeof(*rnet)); |
332 | return -ENOMEM; | |
333 | } | |
334 | ||
335 | INIT_LIST_HEAD(&rnet->lrn_routes); | |
336 | rnet->lrn_net = net; | |
337 | route->lr_hops = hops; | |
338 | route->lr_net = net; | |
e75fb87f | 339 | route->lr_priority = priority; |
d7e09d03 PT |
340 | |
341 | lnet_net_lock(LNET_LOCK_EX); | |
342 | ||
343 | rc = lnet_nid2peer_locked(&route->lr_gateway, gateway, LNET_LOCK_EX); | |
5fd88337 | 344 | if (rc) { |
d7e09d03 PT |
345 | lnet_net_unlock(LNET_LOCK_EX); |
346 | ||
347 | LIBCFS_FREE(route, sizeof(*route)); | |
348 | LIBCFS_FREE(rnet, sizeof(*rnet)); | |
349 | ||
ec523735 | 350 | if (rc == -EHOSTUNREACH) /* gateway is not on a local net */ |
d7e09d03 | 351 | return 0; /* ignore the route entry */ |
ec523735 RG |
352 | CERROR("Error %d creating route %s %d %s\n", rc, |
353 | libcfs_net2str(net), hops, | |
354 | libcfs_nid2str(gateway)); | |
d7e09d03 PT |
355 | return rc; |
356 | } | |
357 | ||
939af333 | 358 | LASSERT(!the_lnet.ln_shutdown); |
d7e09d03 PT |
359 | |
360 | rnet2 = lnet_find_net_locked(net); | |
06ace26e | 361 | if (!rnet2) { |
d7e09d03 PT |
362 | /* new network */ |
363 | list_add_tail(&rnet->lrn_list, lnet_net2rnethash(net)); | |
364 | rnet2 = rnet; | |
365 | } | |
366 | ||
367 | /* Search for a duplicate route (it's a NOOP if it is) */ | |
368 | add_route = 1; | |
939af333 | 369 | list_for_each(e, &rnet2->lrn_routes) { |
d7e09d03 PT |
370 | lnet_route_t *route2 = list_entry(e, lnet_route_t, lr_list); |
371 | ||
372 | if (route2->lr_gateway == route->lr_gateway) { | |
373 | add_route = 0; | |
374 | break; | |
375 | } | |
376 | ||
377 | /* our lookups must be true */ | |
939af333 | 378 | LASSERT(route2->lr_gateway->lp_nid != gateway); |
d7e09d03 PT |
379 | } |
380 | ||
381 | if (add_route) { | |
382 | lnet_peer_addref_locked(route->lr_gateway); /* +1 for notify */ | |
383 | lnet_add_route_to_rnet(rnet2, route); | |
384 | ||
385 | ni = route->lr_gateway->lp_ni; | |
386 | lnet_net_unlock(LNET_LOCK_EX); | |
387 | ||
388 | /* XXX Assume alive */ | |
06ace26e | 389 | if (ni->ni_lnd->lnd_notify) |
0eee6778 | 390 | ni->ni_lnd->lnd_notify(ni, gateway, 1); |
d7e09d03 PT |
391 | |
392 | lnet_net_lock(LNET_LOCK_EX); | |
393 | } | |
394 | ||
395 | /* -1 for notify or !add_route */ | |
396 | lnet_peer_decref_locked(route->lr_gateway); | |
397 | lnet_net_unlock(LNET_LOCK_EX); | |
398 | ||
399 | if (!add_route) | |
400 | LIBCFS_FREE(route, sizeof(*route)); | |
401 | ||
402 | if (rnet != rnet2) | |
403 | LIBCFS_FREE(rnet, sizeof(*rnet)); | |
404 | ||
405 | return 0; | |
406 | } | |
407 | ||
408 | int | |
409 | lnet_check_routes(void) | |
410 | { | |
7e7ab095 MS |
411 | lnet_remotenet_t *rnet; |
412 | lnet_route_t *route; | |
413 | lnet_route_t *route2; | |
414 | struct list_head *e1; | |
415 | struct list_head *e2; | |
416 | int cpt; | |
417 | struct list_head *rn_list; | |
418 | int i; | |
d7e09d03 PT |
419 | |
420 | cpt = lnet_net_lock_current(); | |
421 | ||
422 | for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++) { | |
423 | rn_list = &the_lnet.ln_remote_nets_hash[i]; | |
424 | list_for_each(e1, rn_list) { | |
425 | rnet = list_entry(e1, lnet_remotenet_t, lrn_list); | |
426 | ||
427 | route2 = NULL; | |
428 | list_for_each(e2, &rnet->lrn_routes) { | |
7e7ab095 MS |
429 | lnet_nid_t nid1; |
430 | lnet_nid_t nid2; | |
431 | int net; | |
d7e09d03 | 432 | |
c314c319 | 433 | route = list_entry(e2, lnet_route_t, lr_list); |
d7e09d03 | 434 | |
06ace26e | 435 | if (!route2) { |
d7e09d03 PT |
436 | route2 = route; |
437 | continue; | |
438 | } | |
439 | ||
440 | if (route->lr_gateway->lp_ni == | |
441 | route2->lr_gateway->lp_ni) | |
442 | continue; | |
443 | ||
444 | nid1 = route->lr_gateway->lp_nid; | |
445 | nid2 = route2->lr_gateway->lp_nid; | |
446 | net = rnet->lrn_net; | |
447 | ||
448 | lnet_net_unlock(cpt); | |
449 | ||
2d00bd17 | 450 | CERROR("Routes to %s via %s and %s not supported\n", |
d7e09d03 PT |
451 | libcfs_net2str(net), |
452 | libcfs_nid2str(nid1), | |
453 | libcfs_nid2str(nid2)); | |
454 | return -EINVAL; | |
455 | } | |
456 | } | |
457 | } | |
458 | ||
459 | lnet_net_unlock(cpt); | |
460 | return 0; | |
461 | } | |
462 | ||
463 | int | |
464 | lnet_del_route(__u32 net, lnet_nid_t gw_nid) | |
465 | { | |
7e7ab095 MS |
466 | struct lnet_peer *gateway; |
467 | lnet_remotenet_t *rnet; | |
468 | lnet_route_t *route; | |
469 | struct list_head *e1; | |
470 | struct list_head *e2; | |
471 | int rc = -ENOENT; | |
472 | struct list_head *rn_list; | |
473 | int idx = 0; | |
d7e09d03 PT |
474 | |
475 | CDEBUG(D_NET, "Del route: net %s : gw %s\n", | |
476 | libcfs_net2str(net), libcfs_nid2str(gw_nid)); | |
477 | ||
4420cfd3 JS |
478 | /* |
479 | * NB Caller may specify either all routes via the given gateway | |
480 | * or a specific route entry actual NIDs) | |
481 | */ | |
d7e09d03 PT |
482 | lnet_net_lock(LNET_LOCK_EX); |
483 | if (net == LNET_NIDNET(LNET_NID_ANY)) | |
484 | rn_list = &the_lnet.ln_remote_nets_hash[0]; | |
485 | else | |
486 | rn_list = lnet_net2rnethash(net); | |
487 | ||
488 | again: | |
489 | list_for_each(e1, rn_list) { | |
490 | rnet = list_entry(e1, lnet_remotenet_t, lrn_list); | |
491 | ||
492 | if (!(net == LNET_NIDNET(LNET_NID_ANY) || | |
c314c319 | 493 | net == rnet->lrn_net)) |
d7e09d03 PT |
494 | continue; |
495 | ||
496 | list_for_each(e2, &rnet->lrn_routes) { | |
497 | route = list_entry(e2, lnet_route_t, lr_list); | |
498 | ||
499 | gateway = route->lr_gateway; | |
500 | if (!(gw_nid == LNET_NID_ANY || | |
501 | gw_nid == gateway->lp_nid)) | |
502 | continue; | |
503 | ||
504 | list_del(&route->lr_list); | |
505 | list_del(&route->lr_gwlist); | |
506 | the_lnet.ln_remote_nets_version++; | |
507 | ||
508 | if (list_empty(&rnet->lrn_routes)) | |
509 | list_del(&rnet->lrn_list); | |
510 | else | |
511 | rnet = NULL; | |
512 | ||
513 | lnet_rtr_decref_locked(gateway); | |
514 | lnet_peer_decref_locked(gateway); | |
515 | ||
516 | lnet_net_unlock(LNET_LOCK_EX); | |
517 | ||
518 | LIBCFS_FREE(route, sizeof(*route)); | |
519 | ||
06ace26e | 520 | if (rnet) |
d7e09d03 PT |
521 | LIBCFS_FREE(rnet, sizeof(*rnet)); |
522 | ||
523 | rc = 0; | |
524 | lnet_net_lock(LNET_LOCK_EX); | |
525 | goto again; | |
526 | } | |
527 | } | |
528 | ||
529 | if (net == LNET_NIDNET(LNET_NID_ANY) && | |
530 | ++idx < LNET_REMOTE_NETS_HASH_SIZE) { | |
531 | rn_list = &the_lnet.ln_remote_nets_hash[idx]; | |
532 | goto again; | |
533 | } | |
534 | lnet_net_unlock(LNET_LOCK_EX); | |
535 | ||
536 | return rc; | |
537 | } | |
538 | ||
539 | void | |
939af333 | 540 | lnet_destroy_routes(void) |
d7e09d03 PT |
541 | { |
542 | lnet_del_route(LNET_NIDNET(LNET_NID_ANY), LNET_NID_ANY); | |
543 | } | |
544 | ||
edeb5d8c AS |
545 | int lnet_get_rtr_pool_cfg(int idx, struct lnet_ioctl_pool_cfg *pool_cfg) |
546 | { | |
547 | int i, rc = -ENOENT, j; | |
548 | ||
549 | if (!the_lnet.ln_rtrpools) | |
550 | return rc; | |
551 | ||
552 | for (i = 0; i < LNET_NRBPOOLS; i++) { | |
553 | lnet_rtrbufpool_t *rbp; | |
554 | ||
555 | lnet_net_lock(LNET_LOCK_EX); | |
556 | cfs_percpt_for_each(rbp, j, the_lnet.ln_rtrpools) { | |
557 | if (i++ != idx) | |
558 | continue; | |
559 | ||
560 | pool_cfg->pl_pools[i].pl_npages = rbp[i].rbp_npages; | |
561 | pool_cfg->pl_pools[i].pl_nbuffers = rbp[i].rbp_nbuffers; | |
562 | pool_cfg->pl_pools[i].pl_credits = rbp[i].rbp_credits; | |
563 | pool_cfg->pl_pools[i].pl_mincredits = rbp[i].rbp_mincredits; | |
564 | rc = 0; | |
565 | break; | |
566 | } | |
567 | lnet_net_unlock(LNET_LOCK_EX); | |
568 | } | |
569 | ||
570 | lnet_net_lock(LNET_LOCK_EX); | |
571 | pool_cfg->pl_routing = the_lnet.ln_routing; | |
572 | lnet_net_unlock(LNET_LOCK_EX); | |
573 | ||
574 | return rc; | |
575 | } | |
576 | ||
d7e09d03 PT |
577 | int |
578 | lnet_get_route(int idx, __u32 *net, __u32 *hops, | |
e75fb87f | 579 | lnet_nid_t *gateway, __u32 *alive, __u32 *priority) |
d7e09d03 | 580 | { |
7e7ab095 MS |
581 | struct list_head *e1; |
582 | struct list_head *e2; | |
583 | lnet_remotenet_t *rnet; | |
584 | lnet_route_t *route; | |
585 | int cpt; | |
586 | int i; | |
587 | struct list_head *rn_list; | |
d7e09d03 PT |
588 | |
589 | cpt = lnet_net_lock_current(); | |
590 | ||
591 | for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++) { | |
592 | rn_list = &the_lnet.ln_remote_nets_hash[i]; | |
593 | list_for_each(e1, rn_list) { | |
594 | rnet = list_entry(e1, lnet_remotenet_t, lrn_list); | |
595 | ||
596 | list_for_each(e2, &rnet->lrn_routes) { | |
c314c319 | 597 | route = list_entry(e2, lnet_route_t, lr_list); |
d7e09d03 | 598 | |
5fd88337 | 599 | if (!idx--) { |
7e7ab095 MS |
600 | *net = rnet->lrn_net; |
601 | *hops = route->lr_hops; | |
e75fb87f DO |
602 | *priority = route->lr_priority; |
603 | *gateway = route->lr_gateway->lp_nid; | |
86ef6250 AS |
604 | *alive = route->lr_gateway->lp_alive && |
605 | !route->lr_downis; | |
d7e09d03 PT |
606 | lnet_net_unlock(cpt); |
607 | return 0; | |
608 | } | |
609 | } | |
610 | } | |
611 | } | |
612 | ||
613 | lnet_net_unlock(cpt); | |
614 | return -ENOENT; | |
615 | } | |
616 | ||
617 | void | |
618 | lnet_swap_pinginfo(lnet_ping_info_t *info) | |
619 | { | |
7e7ab095 | 620 | int i; |
d7e09d03 PT |
621 | lnet_ni_status_t *stat; |
622 | ||
623 | __swab32s(&info->pi_magic); | |
624 | __swab32s(&info->pi_features); | |
625 | __swab32s(&info->pi_pid); | |
626 | __swab32s(&info->pi_nnis); | |
627 | for (i = 0; i < info->pi_nnis && i < LNET_MAX_RTR_NIS; i++) { | |
628 | stat = &info->pi_ni[i]; | |
629 | __swab64s(&stat->ns_nid); | |
630 | __swab32s(&stat->ns_status); | |
631 | } | |
d7e09d03 PT |
632 | } |
633 | ||
634 | /** | |
635 | * parse router-checker pinginfo, record number of down NIs for remote | |
636 | * networks on that router. | |
637 | */ | |
638 | static void | |
639 | lnet_parse_rc_info(lnet_rc_data_t *rcd) | |
640 | { | |
7e7ab095 MS |
641 | lnet_ping_info_t *info = rcd->rcd_pinginfo; |
642 | struct lnet_peer *gw = rcd->rcd_gateway; | |
86ef6250 | 643 | lnet_route_t *rte; |
d7e09d03 PT |
644 | |
645 | if (!gw->lp_alive) | |
646 | return; | |
647 | ||
648 | if (info->pi_magic == __swab32(LNET_PROTO_PING_MAGIC)) | |
649 | lnet_swap_pinginfo(info); | |
650 | ||
651 | /* NB always racing with network! */ | |
652 | if (info->pi_magic != LNET_PROTO_PING_MAGIC) { | |
653 | CDEBUG(D_NET, "%s: Unexpected magic %08x\n", | |
654 | libcfs_nid2str(gw->lp_nid), info->pi_magic); | |
655 | gw->lp_ping_feats = LNET_PING_FEAT_INVAL; | |
656 | return; | |
657 | } | |
658 | ||
659 | gw->lp_ping_feats = info->pi_features; | |
5fd88337 | 660 | if (!(gw->lp_ping_feats & LNET_PING_FEAT_MASK)) { |
d7e09d03 PT |
661 | CDEBUG(D_NET, "%s: Unexpected features 0x%x\n", |
662 | libcfs_nid2str(gw->lp_nid), gw->lp_ping_feats); | |
663 | return; /* nothing I can understand */ | |
664 | } | |
665 | ||
5fd88337 | 666 | if (!(gw->lp_ping_feats & LNET_PING_FEAT_NI_STATUS)) |
d7e09d03 PT |
667 | return; /* can't carry NI status info */ |
668 | ||
86ef6250 | 669 | list_for_each_entry(rte, &gw->lp_routes, lr_gwlist) { |
7e7ab095 MS |
670 | int down = 0; |
671 | int up = 0; | |
672 | int i; | |
d7e09d03 | 673 | |
86ef6250 AS |
674 | if (gw->lp_ping_feats & LNET_PING_FEAT_RTE_DISABLED) { |
675 | rte->lr_downis = 1; | |
676 | continue; | |
677 | } | |
678 | ||
d7e09d03 PT |
679 | for (i = 0; i < info->pi_nnis && i < LNET_MAX_RTR_NIS; i++) { |
680 | lnet_ni_status_t *stat = &info->pi_ni[i]; | |
7e7ab095 | 681 | lnet_nid_t nid = stat->ns_nid; |
d7e09d03 PT |
682 | |
683 | if (nid == LNET_NID_ANY) { | |
684 | CDEBUG(D_NET, "%s: unexpected LNET_NID_ANY\n", | |
685 | libcfs_nid2str(gw->lp_nid)); | |
686 | gw->lp_ping_feats = LNET_PING_FEAT_INVAL; | |
687 | return; | |
688 | } | |
689 | ||
690 | if (LNET_NETTYP(LNET_NIDNET(nid)) == LOLND) | |
691 | continue; | |
692 | ||
693 | if (stat->ns_status == LNET_NI_STATUS_DOWN) { | |
764d2e9a | 694 | down++; |
d7e09d03 PT |
695 | continue; |
696 | } | |
697 | ||
698 | if (stat->ns_status == LNET_NI_STATUS_UP) { | |
86ef6250 | 699 | if (LNET_NIDNET(nid) == rte->lr_net) { |
d7e09d03 PT |
700 | up = 1; |
701 | break; | |
702 | } | |
d7e09d03 PT |
703 | continue; |
704 | } | |
705 | ||
706 | CDEBUG(D_NET, "%s: Unexpected status 0x%x\n", | |
707 | libcfs_nid2str(gw->lp_nid), stat->ns_status); | |
708 | gw->lp_ping_feats = LNET_PING_FEAT_INVAL; | |
709 | return; | |
710 | } | |
711 | ||
712 | if (up) { /* ignore downed NIs if NI for dest network is up */ | |
86ef6250 | 713 | rte->lr_downis = 0; |
d7e09d03 PT |
714 | continue; |
715 | } | |
86ef6250 | 716 | rte->lr_downis = down; |
d7e09d03 PT |
717 | } |
718 | } | |
719 | ||
720 | static void | |
721 | lnet_router_checker_event(lnet_event_t *event) | |
722 | { | |
7e7ab095 MS |
723 | lnet_rc_data_t *rcd = event->md.user_ptr; |
724 | struct lnet_peer *lp; | |
d7e09d03 | 725 | |
06ace26e | 726 | LASSERT(rcd); |
d7e09d03 PT |
727 | |
728 | if (event->unlinked) { | |
729 | LNetInvalidateHandle(&rcd->rcd_mdh); | |
730 | return; | |
731 | } | |
732 | ||
733 | LASSERT(event->type == LNET_EVENT_SEND || | |
734 | event->type == LNET_EVENT_REPLY); | |
735 | ||
736 | lp = rcd->rcd_gateway; | |
06ace26e | 737 | LASSERT(lp); |
d7e09d03 | 738 | |
4420cfd3 JS |
739 | /* |
740 | * NB: it's called with holding lnet_res_lock, we have a few | |
741 | * places need to hold both locks at the same time, please take | |
742 | * care of lock ordering | |
743 | */ | |
d7e09d03 PT |
744 | lnet_net_lock(lp->lp_cpt); |
745 | if (!lnet_isrouter(lp) || lp->lp_rcd != rcd) { | |
746 | /* ignore if no longer a router or rcd is replaced */ | |
747 | goto out; | |
748 | } | |
749 | ||
750 | if (event->type == LNET_EVENT_SEND) { | |
751 | lp->lp_ping_notsent = 0; | |
5fd88337 | 752 | if (!event->status) |
d7e09d03 PT |
753 | goto out; |
754 | } | |
755 | ||
756 | /* LNET_EVENT_REPLY */ | |
4420cfd3 JS |
757 | /* |
758 | * A successful REPLY means the router is up. If _any_ comms | |
d7e09d03 PT |
759 | * to the router fail I assume it's down (this will happen if |
760 | * we ping alive routers to try to detect router death before | |
4420cfd3 JS |
761 | * apps get burned). |
762 | */ | |
5fd88337 | 763 | lnet_notify_locked(lp, 1, !event->status, cfs_time_current()); |
4420cfd3 JS |
764 | |
765 | /* | |
766 | * The router checker will wake up very shortly and do the | |
d7e09d03 PT |
767 | * actual notification. |
768 | * XXX If 'lp' stops being a router before then, it will still | |
4420cfd3 JS |
769 | * have the notification pending!!! |
770 | */ | |
5fd88337 | 771 | if (avoid_asym_router_failure && !event->status) |
d7e09d03 PT |
772 | lnet_parse_rc_info(rcd); |
773 | ||
774 | out: | |
775 | lnet_net_unlock(lp->lp_cpt); | |
776 | } | |
777 | ||
2595fa36 | 778 | static void |
d7e09d03 PT |
779 | lnet_wait_known_routerstate(void) |
780 | { | |
7e7ab095 MS |
781 | lnet_peer_t *rtr; |
782 | struct list_head *entry; | |
783 | int all_known; | |
d7e09d03 | 784 | |
939af333 | 785 | LASSERT(the_lnet.ln_rc_state == LNET_RC_STATE_RUNNING); |
d7e09d03 PT |
786 | |
787 | for (;;) { | |
7e7ab095 | 788 | int cpt = lnet_net_lock_current(); |
d7e09d03 PT |
789 | |
790 | all_known = 1; | |
939af333 | 791 | list_for_each(entry, &the_lnet.ln_routers) { |
d7e09d03 PT |
792 | rtr = list_entry(entry, lnet_peer_t, lp_rtr_list); |
793 | ||
5fd88337 | 794 | if (!rtr->lp_alive_count) { |
d7e09d03 PT |
795 | all_known = 0; |
796 | break; | |
797 | } | |
798 | } | |
799 | ||
800 | lnet_net_unlock(cpt); | |
801 | ||
802 | if (all_known) | |
803 | return; | |
804 | ||
d3caf4d5 PT |
805 | set_current_state(TASK_UNINTERRUPTIBLE); |
806 | schedule_timeout(cfs_time_seconds(1)); | |
d7e09d03 PT |
807 | } |
808 | } | |
809 | ||
af3fa7c7 LZ |
810 | void |
811 | lnet_router_ni_update_locked(lnet_peer_t *gw, __u32 net) | |
812 | { | |
813 | lnet_route_t *rte; | |
814 | ||
5fd88337 | 815 | if ((gw->lp_ping_feats & LNET_PING_FEAT_NI_STATUS)) { |
af3fa7c7 LZ |
816 | list_for_each_entry(rte, &gw->lp_routes, lr_gwlist) { |
817 | if (rte->lr_net == net) { | |
818 | rte->lr_downis = 0; | |
819 | break; | |
820 | } | |
821 | } | |
822 | } | |
823 | } | |
824 | ||
2595fa36 | 825 | static void |
d7e09d03 PT |
826 | lnet_update_ni_status_locked(void) |
827 | { | |
7e7ab095 | 828 | lnet_ni_t *ni; |
ec0067d1 | 829 | time64_t now; |
7e7ab095 | 830 | int timeout; |
d7e09d03 PT |
831 | |
832 | LASSERT(the_lnet.ln_routing); | |
833 | ||
834 | timeout = router_ping_timeout + | |
0c575417 | 835 | max(live_router_check_interval, dead_router_check_interval); |
d7e09d03 | 836 | |
ec0067d1 | 837 | now = ktime_get_real_seconds(); |
d7e09d03 PT |
838 | list_for_each_entry(ni, &the_lnet.ln_nis, ni_list) { |
839 | if (ni->ni_lnd->lnd_type == LOLND) | |
840 | continue; | |
841 | ||
842 | if (now < ni->ni_last_alive + timeout) | |
843 | continue; | |
844 | ||
845 | lnet_ni_lock(ni); | |
846 | /* re-check with lock */ | |
847 | if (now < ni->ni_last_alive + timeout) { | |
848 | lnet_ni_unlock(ni); | |
849 | continue; | |
850 | } | |
851 | ||
06ace26e | 852 | LASSERT(ni->ni_status); |
d7e09d03 PT |
853 | |
854 | if (ni->ni_status->ns_status != LNET_NI_STATUS_DOWN) { | |
855 | CDEBUG(D_NET, "NI(%s:%d) status changed to down\n", | |
856 | libcfs_nid2str(ni->ni_nid), timeout); | |
4420cfd3 JS |
857 | /* |
858 | * NB: so far, this is the only place to set | |
859 | * NI status to "down" | |
860 | */ | |
d7e09d03 PT |
861 | ni->ni_status->ns_status = LNET_NI_STATUS_DOWN; |
862 | } | |
863 | lnet_ni_unlock(ni); | |
864 | } | |
865 | } | |
866 | ||
2595fa36 | 867 | static void |
d7e09d03 PT |
868 | lnet_destroy_rc_data(lnet_rc_data_t *rcd) |
869 | { | |
870 | LASSERT(list_empty(&rcd->rcd_list)); | |
871 | /* detached from network */ | |
872 | LASSERT(LNetHandleIsInvalid(rcd->rcd_mdh)); | |
873 | ||
06ace26e | 874 | if (rcd->rcd_gateway) { |
d7e09d03 PT |
875 | int cpt = rcd->rcd_gateway->lp_cpt; |
876 | ||
877 | lnet_net_lock(cpt); | |
878 | lnet_peer_decref_locked(rcd->rcd_gateway); | |
879 | lnet_net_unlock(cpt); | |
880 | } | |
881 | ||
06ace26e | 882 | if (rcd->rcd_pinginfo) |
d7e09d03 PT |
883 | LIBCFS_FREE(rcd->rcd_pinginfo, LNET_PINGINFO_SIZE); |
884 | ||
885 | LIBCFS_FREE(rcd, sizeof(*rcd)); | |
886 | } | |
887 | ||
2595fa36 | 888 | static lnet_rc_data_t * |
d7e09d03 PT |
889 | lnet_create_rc_data_locked(lnet_peer_t *gateway) |
890 | { | |
7e7ab095 MS |
891 | lnet_rc_data_t *rcd = NULL; |
892 | lnet_ping_info_t *pi; | |
893 | int rc; | |
894 | int i; | |
d7e09d03 PT |
895 | |
896 | lnet_net_unlock(gateway->lp_cpt); | |
897 | ||
898 | LIBCFS_ALLOC(rcd, sizeof(*rcd)); | |
06ace26e | 899 | if (!rcd) |
d7e09d03 PT |
900 | goto out; |
901 | ||
902 | LNetInvalidateHandle(&rcd->rcd_mdh); | |
903 | INIT_LIST_HEAD(&rcd->rcd_list); | |
904 | ||
905 | LIBCFS_ALLOC(pi, LNET_PINGINFO_SIZE); | |
06ace26e | 906 | if (!pi) |
d7e09d03 PT |
907 | goto out; |
908 | ||
d7e09d03 PT |
909 | for (i = 0; i < LNET_MAX_RTR_NIS; i++) { |
910 | pi->pi_ni[i].ns_nid = LNET_NID_ANY; | |
911 | pi->pi_ni[i].ns_status = LNET_NI_STATUS_INVALID; | |
912 | } | |
913 | rcd->rcd_pinginfo = pi; | |
914 | ||
939af333 | 915 | LASSERT(!LNetHandleIsInvalid(the_lnet.ln_rc_eqh)); |
d7e09d03 PT |
916 | rc = LNetMDBind((lnet_md_t){.start = pi, |
917 | .user_ptr = rcd, | |
918 | .length = LNET_PINGINFO_SIZE, | |
919 | .threshold = LNET_MD_THRESH_INF, | |
920 | .options = LNET_MD_TRUNCATE, | |
921 | .eq_handle = the_lnet.ln_rc_eqh}, | |
922 | LNET_UNLINK, | |
923 | &rcd->rcd_mdh); | |
924 | if (rc < 0) { | |
925 | CERROR("Can't bind MD: %d\n", rc); | |
926 | goto out; | |
927 | } | |
5fd88337 | 928 | LASSERT(!rc); |
d7e09d03 PT |
929 | |
930 | lnet_net_lock(gateway->lp_cpt); | |
931 | /* router table changed or someone has created rcd for this gateway */ | |
06ace26e | 932 | if (!lnet_isrouter(gateway) || gateway->lp_rcd) { |
d7e09d03 PT |
933 | lnet_net_unlock(gateway->lp_cpt); |
934 | goto out; | |
935 | } | |
936 | ||
937 | lnet_peer_addref_locked(gateway); | |
938 | rcd->rcd_gateway = gateway; | |
939 | gateway->lp_rcd = rcd; | |
940 | gateway->lp_ping_notsent = 0; | |
941 | ||
942 | return rcd; | |
943 | ||
944 | out: | |
06ace26e | 945 | if (rcd) { |
d7e09d03 PT |
946 | if (!LNetHandleIsInvalid(rcd->rcd_mdh)) { |
947 | rc = LNetMDUnlink(rcd->rcd_mdh); | |
5fd88337 | 948 | LASSERT(!rc); |
d7e09d03 PT |
949 | } |
950 | lnet_destroy_rc_data(rcd); | |
951 | } | |
952 | ||
953 | lnet_net_lock(gateway->lp_cpt); | |
954 | return gateway->lp_rcd; | |
955 | } | |
956 | ||
957 | static int | |
939af333 | 958 | lnet_router_check_interval(lnet_peer_t *rtr) |
d7e09d03 PT |
959 | { |
960 | int secs; | |
961 | ||
962 | secs = rtr->lp_alive ? live_router_check_interval : | |
963 | dead_router_check_interval; | |
964 | if (secs < 0) | |
965 | secs = 0; | |
966 | ||
967 | return secs; | |
968 | } | |
969 | ||
970 | static void | |
939af333 | 971 | lnet_ping_router_locked(lnet_peer_t *rtr) |
d7e09d03 PT |
972 | { |
973 | lnet_rc_data_t *rcd = NULL; | |
7e7ab095 MS |
974 | unsigned long now = cfs_time_current(); |
975 | int secs; | |
d7e09d03 PT |
976 | |
977 | lnet_peer_addref_locked(rtr); | |
978 | ||
5fd88337 | 979 | if (rtr->lp_ping_deadline && /* ping timed out? */ |
d7e09d03 PT |
980 | cfs_time_after(now, rtr->lp_ping_deadline)) |
981 | lnet_notify_locked(rtr, 1, 0, now); | |
982 | ||
983 | /* Run any outstanding notifications */ | |
984 | lnet_ni_notify_locked(rtr->lp_ni, rtr); | |
985 | ||
986 | if (!lnet_isrouter(rtr) || | |
987 | the_lnet.ln_rc_state != LNET_RC_STATE_RUNNING) { | |
988 | /* router table changed or router checker is shutting down */ | |
989 | lnet_peer_decref_locked(rtr); | |
990 | return; | |
991 | } | |
992 | ||
06ace26e | 993 | rcd = rtr->lp_rcd ? |
d7e09d03 PT |
994 | rtr->lp_rcd : lnet_create_rc_data_locked(rtr); |
995 | ||
06ace26e | 996 | if (!rcd) |
d7e09d03 PT |
997 | return; |
998 | ||
999 | secs = lnet_router_check_interval(rtr); | |
1000 | ||
1001 | CDEBUG(D_NET, | |
2d00bd17 | 1002 | "rtr %s %d: deadline %lu ping_notsent %d alive %d alive_count %d lp_ping_timestamp %lu\n", |
d7e09d03 PT |
1003 | libcfs_nid2str(rtr->lp_nid), secs, |
1004 | rtr->lp_ping_deadline, rtr->lp_ping_notsent, | |
1005 | rtr->lp_alive, rtr->lp_alive_count, rtr->lp_ping_timestamp); | |
1006 | ||
5fd88337 | 1007 | if (secs && !rtr->lp_ping_notsent && |
d7e09d03 PT |
1008 | cfs_time_after(now, cfs_time_add(rtr->lp_ping_timestamp, |
1009 | cfs_time_seconds(secs)))) { | |
7e7ab095 | 1010 | int rc; |
d7e09d03 | 1011 | lnet_process_id_t id; |
7e7ab095 | 1012 | lnet_handle_md_t mdh; |
d7e09d03 PT |
1013 | |
1014 | id.nid = rtr->lp_nid; | |
1015 | id.pid = LUSTRE_SRV_LNET_PID; | |
1016 | CDEBUG(D_NET, "Check: %s\n", libcfs_id2str(id)); | |
1017 | ||
1018 | rtr->lp_ping_notsent = 1; | |
1019 | rtr->lp_ping_timestamp = now; | |
1020 | ||
1021 | mdh = rcd->rcd_mdh; | |
1022 | ||
5fd88337 | 1023 | if (!rtr->lp_ping_deadline) { |
d7e09d03 PT |
1024 | rtr->lp_ping_deadline = |
1025 | cfs_time_shift(router_ping_timeout); | |
1026 | } | |
1027 | ||
1028 | lnet_net_unlock(rtr->lp_cpt); | |
1029 | ||
1030 | rc = LNetGet(LNET_NID_ANY, mdh, id, LNET_RESERVED_PORTAL, | |
1031 | LNET_PROTO_PING_MATCHBITS, 0); | |
1032 | ||
1033 | lnet_net_lock(rtr->lp_cpt); | |
5fd88337 | 1034 | if (rc) |
d7e09d03 PT |
1035 | rtr->lp_ping_notsent = 0; /* no event pending */ |
1036 | } | |
1037 | ||
1038 | lnet_peer_decref_locked(rtr); | |
d7e09d03 PT |
1039 | } |
1040 | ||
1041 | int | |
1042 | lnet_router_checker_start(void) | |
1043 | { | |
060c2820 | 1044 | struct task_struct *task; |
7e7ab095 MS |
1045 | int rc; |
1046 | int eqsz; | |
d7e09d03 | 1047 | |
939af333 | 1048 | LASSERT(the_lnet.ln_rc_state == LNET_RC_STATE_SHUTDOWN); |
d7e09d03 PT |
1049 | |
1050 | if (check_routers_before_use && | |
1051 | dead_router_check_interval <= 0) { | |
2d00bd17 | 1052 | LCONSOLE_ERROR_MSG(0x10a, "'dead_router_check_interval' must be set if 'check_routers_before_use' is set\n"); |
d7e09d03 PT |
1053 | return -EINVAL; |
1054 | } | |
1055 | ||
1056 | if (!the_lnet.ln_routing && | |
1057 | live_router_check_interval <= 0 && | |
1058 | dead_router_check_interval <= 0) | |
1059 | return 0; | |
1060 | ||
1061 | sema_init(&the_lnet.ln_rc_signal, 0); | |
4420cfd3 JS |
1062 | /* |
1063 | * EQ size doesn't matter; the callback is guaranteed to get every | |
1064 | * event | |
1065 | */ | |
d7e09d03 PT |
1066 | eqsz = 0; |
1067 | rc = LNetEQAlloc(eqsz, lnet_router_checker_event, | |
1068 | &the_lnet.ln_rc_eqh); | |
5fd88337 | 1069 | if (rc) { |
d7e09d03 PT |
1070 | CERROR("Can't allocate EQ(%d): %d\n", eqsz, rc); |
1071 | return -ENOMEM; | |
1072 | } | |
1073 | ||
1074 | the_lnet.ln_rc_state = LNET_RC_STATE_RUNNING; | |
060c2820 JH |
1075 | task = kthread_run(lnet_router_checker, NULL, "router_checker"); |
1076 | if (IS_ERR(task)) { | |
1077 | rc = PTR_ERR(task); | |
d7e09d03 PT |
1078 | CERROR("Can't start router checker thread: %d\n", rc); |
1079 | /* block until event callback signals exit */ | |
1080 | down(&the_lnet.ln_rc_signal); | |
1081 | rc = LNetEQFree(the_lnet.ln_rc_eqh); | |
5fd88337 | 1082 | LASSERT(!rc); |
d7e09d03 PT |
1083 | the_lnet.ln_rc_state = LNET_RC_STATE_SHUTDOWN; |
1084 | return -ENOMEM; | |
1085 | } | |
1086 | ||
1087 | if (check_routers_before_use) { | |
4420cfd3 JS |
1088 | /* |
1089 | * Note that a helpful side-effect of pinging all known routers | |
d7e09d03 | 1090 | * at startup is that it makes them drop stale connections they |
4420cfd3 JS |
1091 | * may have to a previous instance of me. |
1092 | */ | |
d7e09d03 PT |
1093 | lnet_wait_known_routerstate(); |
1094 | } | |
1095 | ||
1096 | return 0; | |
1097 | } | |
1098 | ||
1099 | void | |
939af333 | 1100 | lnet_router_checker_stop(void) |
d7e09d03 PT |
1101 | { |
1102 | int rc; | |
1103 | ||
1104 | if (the_lnet.ln_rc_state == LNET_RC_STATE_SHUTDOWN) | |
1105 | return; | |
1106 | ||
939af333 | 1107 | LASSERT(the_lnet.ln_rc_state == LNET_RC_STATE_RUNNING); |
d7e09d03 PT |
1108 | the_lnet.ln_rc_state = LNET_RC_STATE_STOPPING; |
1109 | ||
1110 | /* block until event callback signals exit */ | |
1111 | down(&the_lnet.ln_rc_signal); | |
1112 | LASSERT(the_lnet.ln_rc_state == LNET_RC_STATE_SHUTDOWN); | |
1113 | ||
1114 | rc = LNetEQFree(the_lnet.ln_rc_eqh); | |
5fd88337 | 1115 | LASSERT(!rc); |
d7e09d03 PT |
1116 | } |
1117 | ||
1118 | static void | |
1119 | lnet_prune_rc_data(int wait_unlink) | |
1120 | { | |
7e7ab095 MS |
1121 | lnet_rc_data_t *rcd; |
1122 | lnet_rc_data_t *tmp; | |
1123 | lnet_peer_t *lp; | |
1124 | struct list_head head; | |
1125 | int i = 2; | |
d7e09d03 PT |
1126 | |
1127 | if (likely(the_lnet.ln_rc_state == LNET_RC_STATE_RUNNING && | |
1128 | list_empty(&the_lnet.ln_rcd_deathrow) && | |
1129 | list_empty(&the_lnet.ln_rcd_zombie))) | |
1130 | return; | |
1131 | ||
1132 | INIT_LIST_HEAD(&head); | |
1133 | ||
1134 | lnet_net_lock(LNET_LOCK_EX); | |
1135 | ||
1136 | if (the_lnet.ln_rc_state != LNET_RC_STATE_RUNNING) { | |
1137 | /* router checker is stopping, prune all */ | |
1138 | list_for_each_entry(lp, &the_lnet.ln_routers, | |
c314c319 | 1139 | lp_rtr_list) { |
06ace26e | 1140 | if (!lp->lp_rcd) |
d7e09d03 PT |
1141 | continue; |
1142 | ||
1143 | LASSERT(list_empty(&lp->lp_rcd->rcd_list)); | |
1144 | list_add(&lp->lp_rcd->rcd_list, | |
c314c319 | 1145 | &the_lnet.ln_rcd_deathrow); |
d7e09d03 PT |
1146 | lp->lp_rcd = NULL; |
1147 | } | |
1148 | } | |
1149 | ||
1150 | /* unlink all RCDs on deathrow list */ | |
1151 | list_splice_init(&the_lnet.ln_rcd_deathrow, &head); | |
1152 | ||
1153 | if (!list_empty(&head)) { | |
1154 | lnet_net_unlock(LNET_LOCK_EX); | |
1155 | ||
1156 | list_for_each_entry(rcd, &head, rcd_list) | |
1157 | LNetMDUnlink(rcd->rcd_mdh); | |
1158 | ||
1159 | lnet_net_lock(LNET_LOCK_EX); | |
1160 | } | |
1161 | ||
1162 | list_splice_init(&head, &the_lnet.ln_rcd_zombie); | |
1163 | ||
1164 | /* release all zombie RCDs */ | |
1165 | while (!list_empty(&the_lnet.ln_rcd_zombie)) { | |
1166 | list_for_each_entry_safe(rcd, tmp, &the_lnet.ln_rcd_zombie, | |
c314c319 | 1167 | rcd_list) { |
d7e09d03 PT |
1168 | if (LNetHandleIsInvalid(rcd->rcd_mdh)) |
1169 | list_move(&rcd->rcd_list, &head); | |
1170 | } | |
1171 | ||
1172 | wait_unlink = wait_unlink && | |
1173 | !list_empty(&the_lnet.ln_rcd_zombie); | |
1174 | ||
1175 | lnet_net_unlock(LNET_LOCK_EX); | |
1176 | ||
1177 | while (!list_empty(&head)) { | |
1178 | rcd = list_entry(head.next, | |
c314c319 | 1179 | lnet_rc_data_t, rcd_list); |
d7e09d03 PT |
1180 | list_del_init(&rcd->rcd_list); |
1181 | lnet_destroy_rc_data(rcd); | |
1182 | } | |
1183 | ||
1184 | if (!wait_unlink) | |
1185 | return; | |
1186 | ||
1187 | i++; | |
1188 | CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, | |
1189 | "Waiting for rc buffers to unlink\n"); | |
d3caf4d5 PT |
1190 | set_current_state(TASK_UNINTERRUPTIBLE); |
1191 | schedule_timeout(cfs_time_seconds(1) / 4); | |
d7e09d03 PT |
1192 | |
1193 | lnet_net_lock(LNET_LOCK_EX); | |
1194 | } | |
1195 | ||
1196 | lnet_net_unlock(LNET_LOCK_EX); | |
1197 | } | |
1198 | ||
d7e09d03 PT |
1199 | static int |
1200 | lnet_router_checker(void *arg) | |
1201 | { | |
7e7ab095 MS |
1202 | lnet_peer_t *rtr; |
1203 | struct list_head *entry; | |
d7e09d03 PT |
1204 | |
1205 | cfs_block_allsigs(); | |
1206 | ||
939af333 | 1207 | LASSERT(the_lnet.ln_rc_state == LNET_RC_STATE_RUNNING); |
d7e09d03 PT |
1208 | |
1209 | while (the_lnet.ln_rc_state == LNET_RC_STATE_RUNNING) { | |
7e7ab095 MS |
1210 | __u64 version; |
1211 | int cpt; | |
1212 | int cpt2; | |
d7e09d03 PT |
1213 | |
1214 | cpt = lnet_net_lock_current(); | |
1215 | rescan: | |
1216 | version = the_lnet.ln_routers_version; | |
1217 | ||
1218 | list_for_each(entry, &the_lnet.ln_routers) { | |
1219 | rtr = list_entry(entry, lnet_peer_t, lp_rtr_list); | |
1220 | ||
1221 | cpt2 = lnet_cpt_of_nid_locked(rtr->lp_nid); | |
1222 | if (cpt != cpt2) { | |
1223 | lnet_net_unlock(cpt); | |
1224 | cpt = cpt2; | |
1225 | lnet_net_lock(cpt); | |
1226 | /* the routers list has changed */ | |
1227 | if (version != the_lnet.ln_routers_version) | |
1228 | goto rescan; | |
1229 | } | |
1230 | ||
1231 | lnet_ping_router_locked(rtr); | |
1232 | ||
1233 | /* NB dropped lock */ | |
1234 | if (version != the_lnet.ln_routers_version) { | |
1235 | /* the routers list has changed */ | |
1236 | goto rescan; | |
1237 | } | |
1238 | } | |
1239 | ||
1240 | if (the_lnet.ln_routing) | |
1241 | lnet_update_ni_status_locked(); | |
1242 | ||
1243 | lnet_net_unlock(cpt); | |
1244 | ||
1245 | lnet_prune_rc_data(0); /* don't wait for UNLINK */ | |
1246 | ||
4420cfd3 JS |
1247 | /* |
1248 | * Call schedule_timeout() here always adds 1 to load average | |
d7e09d03 | 1249 | * because kernel counts # active tasks as nr_running |
4420cfd3 JS |
1250 | * + nr_uninterruptible. |
1251 | */ | |
18fd5baa PT |
1252 | set_current_state(TASK_INTERRUPTIBLE); |
1253 | schedule_timeout(cfs_time_seconds(1)); | |
d7e09d03 PT |
1254 | } |
1255 | ||
1256 | LASSERT(the_lnet.ln_rc_state == LNET_RC_STATE_STOPPING); | |
1257 | ||
1258 | lnet_prune_rc_data(1); /* wait for UNLINK */ | |
1259 | ||
1260 | the_lnet.ln_rc_state = LNET_RC_STATE_SHUTDOWN; | |
1261 | up(&the_lnet.ln_rc_signal); | |
1262 | /* The unlink event callback will signal final completion */ | |
1263 | return 0; | |
1264 | } | |
1265 | ||
86ef6250 | 1266 | void |
d7e09d03 PT |
1267 | lnet_destroy_rtrbuf(lnet_rtrbuf_t *rb, int npages) |
1268 | { | |
1269 | int sz = offsetof(lnet_rtrbuf_t, rb_kiov[npages]); | |
1270 | ||
1271 | while (--npages >= 0) | |
1272 | __free_page(rb->rb_kiov[npages].kiov_page); | |
1273 | ||
1274 | LIBCFS_FREE(rb, sz); | |
1275 | } | |
1276 | ||
2595fa36 | 1277 | static lnet_rtrbuf_t * |
d7e09d03 PT |
1278 | lnet_new_rtrbuf(lnet_rtrbufpool_t *rbp, int cpt) |
1279 | { | |
7e7ab095 MS |
1280 | int npages = rbp->rbp_npages; |
1281 | int sz = offsetof(lnet_rtrbuf_t, rb_kiov[npages]); | |
1282 | struct page *page; | |
d7e09d03 | 1283 | lnet_rtrbuf_t *rb; |
7e7ab095 | 1284 | int i; |
d7e09d03 PT |
1285 | |
1286 | LIBCFS_CPT_ALLOC(rb, lnet_cpt_table(), cpt, sz); | |
06ace26e | 1287 | if (!rb) |
d7e09d03 PT |
1288 | return NULL; |
1289 | ||
1290 | rb->rb_pool = rbp; | |
1291 | ||
1292 | for (i = 0; i < npages; i++) { | |
49c02a75 PT |
1293 | page = alloc_pages_node( |
1294 | cfs_cpt_spread_node(lnet_cpt_table(), cpt), | |
40113370 | 1295 | GFP_KERNEL | __GFP_ZERO, 0); |
06ace26e | 1296 | if (!page) { |
d7e09d03 PT |
1297 | while (--i >= 0) |
1298 | __free_page(rb->rb_kiov[i].kiov_page); | |
1299 | ||
1300 | LIBCFS_FREE(rb, sz); | |
1301 | return NULL; | |
1302 | } | |
1303 | ||
1304 | rb->rb_kiov[i].kiov_len = PAGE_CACHE_SIZE; | |
1305 | rb->rb_kiov[i].kiov_offset = 0; | |
1306 | rb->rb_kiov[i].kiov_page = page; | |
1307 | } | |
1308 | ||
1309 | return rb; | |
1310 | } | |
1311 | ||
2595fa36 | 1312 | static void |
86ef6250 | 1313 | lnet_rtrpool_free_bufs(lnet_rtrbufpool_t *rbp, int cpt) |
d7e09d03 | 1314 | { |
7e7ab095 | 1315 | int npages = rbp->rbp_npages; |
86ef6250 | 1316 | struct list_head tmp; |
7e7ab095 | 1317 | lnet_rtrbuf_t *rb; |
d7e09d03 | 1318 | |
5fd88337 | 1319 | if (!rbp->rbp_nbuffers) /* not initialized or already freed */ |
d7e09d03 PT |
1320 | return; |
1321 | ||
86ef6250 | 1322 | INIT_LIST_HEAD(&tmp); |
d7e09d03 | 1323 | |
86ef6250 AS |
1324 | lnet_net_lock(cpt); |
1325 | lnet_drop_routed_msgs_locked(&rbp->rbp_msgs, cpt); | |
1326 | list_splice_init(&rbp->rbp_bufs, &tmp); | |
1327 | rbp->rbp_nbuffers = 0; | |
1328 | rbp->rbp_credits = 0; | |
1329 | rbp->rbp_mincredits = 0; | |
1330 | lnet_net_unlock(cpt); | |
d7e09d03 | 1331 | |
86ef6250 AS |
1332 | /* Free buffers on the free list. */ |
1333 | while (!list_empty(&tmp)) { | |
1334 | rb = list_entry(tmp.next, lnet_rtrbuf_t, rb_list); | |
d7e09d03 PT |
1335 | list_del(&rb->rb_list); |
1336 | lnet_destroy_rtrbuf(rb, npages); | |
d7e09d03 | 1337 | } |
d7e09d03 PT |
1338 | } |
1339 | ||
2595fa36 | 1340 | static int |
86ef6250 | 1341 | lnet_rtrpool_adjust_bufs(lnet_rtrbufpool_t *rbp, int nbufs, int cpt) |
d7e09d03 | 1342 | { |
86ef6250 | 1343 | struct list_head rb_list; |
d7e09d03 | 1344 | lnet_rtrbuf_t *rb; |
86ef6250 AS |
1345 | int num_rb; |
1346 | int num_buffers = 0; | |
1347 | int npages = rbp->rbp_npages; | |
d7e09d03 | 1348 | |
86ef6250 AS |
1349 | /* |
1350 | * If we are called for less buffers than already in the pool, we | |
1351 | * just lower the nbuffers number and excess buffers will be | |
1352 | * thrown away as they are returned to the free list. Credits | |
1353 | * then get adjusted as well. | |
1354 | */ | |
1355 | if (nbufs <= rbp->rbp_nbuffers) { | |
1356 | lnet_net_lock(cpt); | |
1357 | rbp->rbp_nbuffers = nbufs; | |
1358 | lnet_net_unlock(cpt); | |
d7e09d03 PT |
1359 | return 0; |
1360 | } | |
1361 | ||
86ef6250 | 1362 | INIT_LIST_HEAD(&rb_list); |
d7e09d03 | 1363 | |
86ef6250 AS |
1364 | /* |
1365 | * allocate the buffers on a local list first. If all buffers are | |
1366 | * allocated successfully then join this list to the rbp buffer | |
1367 | * list. If not then free all allocated buffers. | |
1368 | */ | |
1369 | num_rb = rbp->rbp_nbuffers; | |
1370 | ||
1371 | while (num_rb < nbufs) { | |
1372 | rb = lnet_new_rtrbuf(rbp, cpt); | |
06ace26e | 1373 | if (!rb) { |
86ef6250 AS |
1374 | CERROR("Failed to allocate %d route bufs of %d pages\n", |
1375 | nbufs, npages); | |
1376 | goto failed; | |
d7e09d03 PT |
1377 | } |
1378 | ||
86ef6250 AS |
1379 | list_add(&rb->rb_list, &rb_list); |
1380 | num_buffers++; | |
1381 | num_rb++; | |
d7e09d03 PT |
1382 | } |
1383 | ||
86ef6250 AS |
1384 | lnet_net_lock(cpt); |
1385 | ||
1386 | list_splice_tail(&rb_list, &rbp->rbp_bufs); | |
1387 | rbp->rbp_nbuffers += num_buffers; | |
1388 | rbp->rbp_credits += num_buffers; | |
1389 | rbp->rbp_mincredits = rbp->rbp_credits; | |
1390 | /* | |
1391 | * We need to schedule blocked msg using the newly | |
1392 | * added buffers. | |
1393 | */ | |
1394 | while (!list_empty(&rbp->rbp_bufs) && | |
1395 | !list_empty(&rbp->rbp_msgs)) | |
1396 | lnet_schedule_blocked_locked(rbp); | |
1397 | ||
1398 | lnet_net_unlock(cpt); | |
1399 | ||
d7e09d03 | 1400 | return 0; |
86ef6250 AS |
1401 | |
1402 | failed: | |
1403 | while (!list_empty(&rb_list)) { | |
1404 | rb = list_entry(rb_list.next, lnet_rtrbuf_t, rb_list); | |
1405 | list_del(&rb->rb_list); | |
1406 | lnet_destroy_rtrbuf(rb, npages); | |
1407 | } | |
1408 | ||
1409 | return -ENOMEM; | |
d7e09d03 PT |
1410 | } |
1411 | ||
2595fa36 | 1412 | static void |
d7e09d03 PT |
1413 | lnet_rtrpool_init(lnet_rtrbufpool_t *rbp, int npages) |
1414 | { | |
1415 | INIT_LIST_HEAD(&rbp->rbp_msgs); | |
1416 | INIT_LIST_HEAD(&rbp->rbp_bufs); | |
1417 | ||
1418 | rbp->rbp_npages = npages; | |
1419 | rbp->rbp_credits = 0; | |
1420 | rbp->rbp_mincredits = 0; | |
1421 | } | |
1422 | ||
1423 | void | |
86ef6250 | 1424 | lnet_rtrpools_free(int keep_pools) |
d7e09d03 PT |
1425 | { |
1426 | lnet_rtrbufpool_t *rtrp; | |
7e7ab095 | 1427 | int i; |
d7e09d03 | 1428 | |
06ace26e | 1429 | if (!the_lnet.ln_rtrpools) /* uninitialized or freed */ |
d7e09d03 PT |
1430 | return; |
1431 | ||
1432 | cfs_percpt_for_each(rtrp, i, the_lnet.ln_rtrpools) { | |
86ef6250 AS |
1433 | lnet_rtrpool_free_bufs(&rtrp[LNET_TINY_BUF_IDX], i); |
1434 | lnet_rtrpool_free_bufs(&rtrp[LNET_SMALL_BUF_IDX], i); | |
1435 | lnet_rtrpool_free_bufs(&rtrp[LNET_LARGE_BUF_IDX], i); | |
d7e09d03 PT |
1436 | } |
1437 | ||
86ef6250 AS |
1438 | if (!keep_pools) { |
1439 | cfs_percpt_free(the_lnet.ln_rtrpools); | |
1440 | the_lnet.ln_rtrpools = NULL; | |
1441 | } | |
d7e09d03 PT |
1442 | } |
1443 | ||
1444 | static int | |
86ef6250 | 1445 | lnet_nrb_tiny_calculate(void) |
d7e09d03 | 1446 | { |
7e7ab095 | 1447 | int nrbs = LNET_NRB_TINY; |
d7e09d03 PT |
1448 | |
1449 | if (tiny_router_buffers < 0) { | |
1450 | LCONSOLE_ERROR_MSG(0x10c, | |
2d00bd17 JP |
1451 | "tiny_router_buffers=%d invalid when routing enabled\n", |
1452 | tiny_router_buffers); | |
d7e09d03 PT |
1453 | return -1; |
1454 | } | |
1455 | ||
1456 | if (tiny_router_buffers > 0) | |
1457 | nrbs = tiny_router_buffers; | |
1458 | ||
1459 | nrbs /= LNET_CPT_NUMBER; | |
1460 | return max(nrbs, LNET_NRB_TINY_MIN); | |
1461 | } | |
1462 | ||
1463 | static int | |
86ef6250 | 1464 | lnet_nrb_small_calculate(void) |
d7e09d03 | 1465 | { |
7e7ab095 | 1466 | int nrbs = LNET_NRB_SMALL; |
d7e09d03 PT |
1467 | |
1468 | if (small_router_buffers < 0) { | |
1469 | LCONSOLE_ERROR_MSG(0x10c, | |
2d00bd17 JP |
1470 | "small_router_buffers=%d invalid when routing enabled\n", |
1471 | small_router_buffers); | |
d7e09d03 PT |
1472 | return -1; |
1473 | } | |
1474 | ||
1475 | if (small_router_buffers > 0) | |
1476 | nrbs = small_router_buffers; | |
1477 | ||
1478 | nrbs /= LNET_CPT_NUMBER; | |
1479 | return max(nrbs, LNET_NRB_SMALL_MIN); | |
1480 | } | |
1481 | ||
1482 | static int | |
86ef6250 | 1483 | lnet_nrb_large_calculate(void) |
d7e09d03 | 1484 | { |
7e7ab095 | 1485 | int nrbs = LNET_NRB_LARGE; |
d7e09d03 PT |
1486 | |
1487 | if (large_router_buffers < 0) { | |
1488 | LCONSOLE_ERROR_MSG(0x10c, | |
2d00bd17 JP |
1489 | "large_router_buffers=%d invalid when routing enabled\n", |
1490 | large_router_buffers); | |
d7e09d03 PT |
1491 | return -1; |
1492 | } | |
1493 | ||
1494 | if (large_router_buffers > 0) | |
1495 | nrbs = large_router_buffers; | |
1496 | ||
1497 | nrbs /= LNET_CPT_NUMBER; | |
1498 | return max(nrbs, LNET_NRB_LARGE_MIN); | |
1499 | } | |
1500 | ||
1501 | int | |
1502 | lnet_rtrpools_alloc(int im_a_router) | |
1503 | { | |
1504 | lnet_rtrbufpool_t *rtrp; | |
7e7ab095 MS |
1505 | int nrb_tiny; |
1506 | int nrb_small; | |
1507 | int nrb_large; | |
1508 | int rc; | |
1509 | int i; | |
d7e09d03 PT |
1510 | |
1511 | if (!strcmp(forwarding, "")) { | |
1512 | /* not set either way */ | |
1513 | if (!im_a_router) | |
1514 | return 0; | |
1515 | } else if (!strcmp(forwarding, "disabled")) { | |
1516 | /* explicitly disabled */ | |
1517 | return 0; | |
1518 | } else if (!strcmp(forwarding, "enabled")) { | |
1519 | /* explicitly enabled */ | |
1520 | } else { | |
2d00bd17 | 1521 | LCONSOLE_ERROR_MSG(0x10b, "'forwarding' not set to either 'enabled' or 'disabled'\n"); |
d7e09d03 PT |
1522 | return -EINVAL; |
1523 | } | |
1524 | ||
86ef6250 | 1525 | nrb_tiny = lnet_nrb_tiny_calculate(); |
d7e09d03 PT |
1526 | if (nrb_tiny < 0) |
1527 | return -EINVAL; | |
1528 | ||
86ef6250 | 1529 | nrb_small = lnet_nrb_small_calculate(); |
d7e09d03 PT |
1530 | if (nrb_small < 0) |
1531 | return -EINVAL; | |
1532 | ||
86ef6250 | 1533 | nrb_large = lnet_nrb_large_calculate(); |
d7e09d03 PT |
1534 | if (nrb_large < 0) |
1535 | return -EINVAL; | |
1536 | ||
1537 | the_lnet.ln_rtrpools = cfs_percpt_alloc(lnet_cpt_table(), | |
1538 | LNET_NRBPOOLS * | |
1539 | sizeof(lnet_rtrbufpool_t)); | |
06ace26e | 1540 | if (!the_lnet.ln_rtrpools) { |
d7e09d03 PT |
1541 | LCONSOLE_ERROR_MSG(0x10c, |
1542 | "Failed to initialize router buffe pool\n"); | |
1543 | return -ENOMEM; | |
1544 | } | |
1545 | ||
1546 | cfs_percpt_for_each(rtrp, i, the_lnet.ln_rtrpools) { | |
86ef6250 AS |
1547 | lnet_rtrpool_init(&rtrp[LNET_TINY_BUF_IDX], 0); |
1548 | rc = lnet_rtrpool_adjust_bufs(&rtrp[LNET_TINY_BUF_IDX], | |
1549 | nrb_tiny, i); | |
5fd88337 | 1550 | if (rc) |
d7e09d03 PT |
1551 | goto failed; |
1552 | ||
86ef6250 AS |
1553 | lnet_rtrpool_init(&rtrp[LNET_SMALL_BUF_IDX], |
1554 | LNET_NRB_SMALL_PAGES); | |
1555 | rc = lnet_rtrpool_adjust_bufs(&rtrp[LNET_SMALL_BUF_IDX], | |
1556 | nrb_small, i); | |
5fd88337 | 1557 | if (rc) |
d7e09d03 PT |
1558 | goto failed; |
1559 | ||
86ef6250 AS |
1560 | lnet_rtrpool_init(&rtrp[LNET_LARGE_BUF_IDX], |
1561 | LNET_NRB_LARGE_PAGES); | |
1562 | rc = lnet_rtrpool_adjust_bufs(&rtrp[LNET_LARGE_BUF_IDX], | |
1563 | nrb_large, i); | |
5fd88337 | 1564 | if (rc) |
d7e09d03 PT |
1565 | goto failed; |
1566 | } | |
1567 | ||
1568 | lnet_net_lock(LNET_LOCK_EX); | |
1569 | the_lnet.ln_routing = 1; | |
1570 | lnet_net_unlock(LNET_LOCK_EX); | |
1571 | ||
1572 | return 0; | |
1573 | ||
1574 | failed: | |
86ef6250 | 1575 | lnet_rtrpools_free(0); |
d7e09d03 PT |
1576 | return rc; |
1577 | } | |
1578 | ||
edeb5d8c AS |
1579 | static int |
1580 | lnet_rtrpools_adjust_helper(int tiny, int small, int large) | |
86ef6250 AS |
1581 | { |
1582 | int nrb = 0; | |
1583 | int rc = 0; | |
1584 | int i; | |
1585 | lnet_rtrbufpool_t *rtrp; | |
1586 | ||
86ef6250 AS |
1587 | /* |
1588 | * If the provided values for each buffer pool are different than the | |
1589 | * configured values, we need to take action. | |
1590 | */ | |
edeb5d8c | 1591 | if (tiny >= 0) { |
86ef6250 AS |
1592 | tiny_router_buffers = tiny; |
1593 | nrb = lnet_nrb_tiny_calculate(); | |
1594 | cfs_percpt_for_each(rtrp, i, the_lnet.ln_rtrpools) { | |
1595 | rc = lnet_rtrpool_adjust_bufs(&rtrp[LNET_TINY_BUF_IDX], | |
1596 | nrb, i); | |
1597 | if (rc) | |
1598 | return rc; | |
1599 | } | |
1600 | } | |
edeb5d8c | 1601 | if (small >= 0) { |
86ef6250 AS |
1602 | small_router_buffers = small; |
1603 | nrb = lnet_nrb_small_calculate(); | |
1604 | cfs_percpt_for_each(rtrp, i, the_lnet.ln_rtrpools) { | |
1605 | rc = lnet_rtrpool_adjust_bufs(&rtrp[LNET_SMALL_BUF_IDX], | |
1606 | nrb, i); | |
1607 | if (rc) | |
1608 | return rc; | |
1609 | } | |
1610 | } | |
edeb5d8c | 1611 | if (large >= 0) { |
86ef6250 AS |
1612 | large_router_buffers = large; |
1613 | nrb = lnet_nrb_large_calculate(); | |
1614 | cfs_percpt_for_each(rtrp, i, the_lnet.ln_rtrpools) { | |
1615 | rc = lnet_rtrpool_adjust_bufs(&rtrp[LNET_LARGE_BUF_IDX], | |
1616 | nrb, i); | |
1617 | if (rc) | |
1618 | return rc; | |
1619 | } | |
1620 | } | |
1621 | ||
1622 | return 0; | |
1623 | } | |
1624 | ||
edeb5d8c AS |
1625 | int |
1626 | lnet_rtrpools_adjust(int tiny, int small, int large) | |
1627 | { | |
1628 | /* | |
1629 | * this function doesn't revert the changes if adding new buffers | |
1630 | * failed. It's up to the user space caller to revert the | |
1631 | * changes. | |
1632 | */ | |
1633 | if (!the_lnet.ln_routing) | |
1634 | return 0; | |
1635 | ||
1636 | return lnet_rtrpools_adjust_helper(tiny, small, large); | |
1637 | } | |
1638 | ||
86ef6250 AS |
1639 | int |
1640 | lnet_rtrpools_enable(void) | |
1641 | { | |
1642 | int rc; | |
1643 | ||
1644 | if (the_lnet.ln_routing) | |
1645 | return 0; | |
1646 | ||
1647 | if (!the_lnet.ln_rtrpools) | |
1648 | /* | |
1649 | * If routing is turned off, and we have never | |
1650 | * initialized the pools before, just call the | |
1651 | * standard buffer pool allocation routine as | |
1652 | * if we are just configuring this for the first | |
1653 | * time. | |
1654 | */ | |
1655 | return lnet_rtrpools_alloc(1); | |
1656 | ||
edeb5d8c | 1657 | rc = lnet_rtrpools_adjust_helper(0, 0, 0); |
86ef6250 AS |
1658 | if (rc) |
1659 | return rc; | |
1660 | ||
1661 | lnet_net_lock(LNET_LOCK_EX); | |
1662 | the_lnet.ln_routing = 1; | |
1663 | ||
1664 | the_lnet.ln_ping_info->pi_features &= ~LNET_PING_FEAT_RTE_DISABLED; | |
1665 | lnet_net_unlock(LNET_LOCK_EX); | |
1666 | ||
1667 | return 0; | |
1668 | } | |
1669 | ||
1670 | void | |
1671 | lnet_rtrpools_disable(void) | |
1672 | { | |
1673 | if (!the_lnet.ln_routing) | |
1674 | return; | |
1675 | ||
1676 | lnet_net_lock(LNET_LOCK_EX); | |
1677 | the_lnet.ln_routing = 0; | |
1678 | the_lnet.ln_ping_info->pi_features |= LNET_PING_FEAT_RTE_DISABLED; | |
1679 | ||
1680 | tiny_router_buffers = 0; | |
1681 | small_router_buffers = 0; | |
1682 | large_router_buffers = 0; | |
1683 | lnet_net_unlock(LNET_LOCK_EX); | |
1684 | lnet_rtrpools_free(1); | |
1685 | } | |
1686 | ||
d7e09d03 | 1687 | int |
a649ad1d | 1688 | lnet_notify(lnet_ni_t *ni, lnet_nid_t nid, int alive, unsigned long when) |
d7e09d03 | 1689 | { |
7e7ab095 MS |
1690 | struct lnet_peer *lp = NULL; |
1691 | unsigned long now = cfs_time_current(); | |
1692 | int cpt = lnet_cpt_of_nid(nid); | |
d7e09d03 | 1693 | |
59cfb96f | 1694 | LASSERT(!in_interrupt()); |
d7e09d03 | 1695 | |
939af333 | 1696 | CDEBUG(D_NET, "%s notifying %s: %s\n", |
06ace26e | 1697 | !ni ? "userspace" : libcfs_nid2str(ni->ni_nid), |
c314c319 JS |
1698 | libcfs_nid2str(nid), |
1699 | alive ? "up" : "down"); | |
d7e09d03 | 1700 | |
06ace26e | 1701 | if (ni && |
d7e09d03 | 1702 | LNET_NIDNET(ni->ni_nid) != LNET_NIDNET(nid)) { |
939af333 | 1703 | CWARN("Ignoring notification of %s %s by %s (different net)\n", |
c314c319 JS |
1704 | libcfs_nid2str(nid), alive ? "birth" : "death", |
1705 | libcfs_nid2str(ni->ni_nid)); | |
d7e09d03 PT |
1706 | return -EINVAL; |
1707 | } | |
1708 | ||
1709 | /* can't do predictions... */ | |
1710 | if (cfs_time_after(when, now)) { | |
2d00bd17 | 1711 | CWARN("Ignoring prediction from %s of %s %s %ld seconds in the future\n", |
06ace26e | 1712 | !ni ? "userspace" : libcfs_nid2str(ni->ni_nid), |
2d00bd17 JP |
1713 | libcfs_nid2str(nid), alive ? "up" : "down", |
1714 | cfs_duration_sec(cfs_time_sub(when, now))); | |
d7e09d03 PT |
1715 | return -EINVAL; |
1716 | } | |
1717 | ||
06ace26e | 1718 | if (ni && !alive && /* LND telling me she's down */ |
d7e09d03 PT |
1719 | !auto_down) { /* auto-down disabled */ |
1720 | CDEBUG(D_NET, "Auto-down disabled\n"); | |
1721 | return 0; | |
1722 | } | |
1723 | ||
1724 | lnet_net_lock(cpt); | |
1725 | ||
1726 | if (the_lnet.ln_shutdown) { | |
1727 | lnet_net_unlock(cpt); | |
1728 | return -ESHUTDOWN; | |
1729 | } | |
1730 | ||
1731 | lp = lnet_find_peer_locked(the_lnet.ln_peer_tables[cpt], nid); | |
06ace26e | 1732 | if (!lp) { |
d7e09d03 PT |
1733 | /* nid not found */ |
1734 | lnet_net_unlock(cpt); | |
1735 | CDEBUG(D_NET, "%s not found\n", libcfs_nid2str(nid)); | |
1736 | return 0; | |
1737 | } | |
1738 | ||
4420cfd3 JS |
1739 | /* |
1740 | * We can't fully trust LND on reporting exact peer last_alive | |
d7e09d03 PT |
1741 | * if he notifies us about dead peer. For example ksocklnd can |
1742 | * call us with when == _time_when_the_node_was_booted_ if | |
4420cfd3 JS |
1743 | * no connections were successfully established |
1744 | */ | |
06ace26e | 1745 | if (ni && !alive && when < lp->lp_last_alive) |
d7e09d03 PT |
1746 | when = lp->lp_last_alive; |
1747 | ||
06ace26e | 1748 | lnet_notify_locked(lp, !ni, alive, when); |
d7e09d03 PT |
1749 | |
1750 | lnet_ni_notify_locked(ni, lp); | |
1751 | ||
1752 | lnet_peer_decref_locked(lp); | |
1753 | ||
1754 | lnet_net_unlock(cpt); | |
1755 | return 0; | |
1756 | } | |
1757 | EXPORT_SYMBOL(lnet_notify); |