hammer2 - Add peer_type field to LNK_CONN and LNK_SPAN
[dragonfly.git] / sbin / hammer2 / msg_lnk.c
CommitLineData
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1/*
2 * Copyright (c) 2012 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@dragonflybsd.org>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34/*
35 * LNK_SPAN PROTOCOL SUPPORT FUNCTIONS
36 *
37 * This code supports the LNK_SPAN protocol. Essentially all PFS's
38 * clients and services rendezvous with the userland hammer2 service and
39 * open LNK_SPAN transactions using a message header linkid of 0,
40 * registering any PFS's they have connectivity to with us.
41 *
42 * --
43 *
44 * Each registration maintains its own open LNK_SPAN message transaction.
45 * The SPANs are collected, aggregated, and retransmitted over available
46 * connections through the maintainance of additional LNK_SPAN message
47 * transactions on each link.
48 *
49 * The msgid for each active LNK_SPAN transaction we receive allows us to
50 * send a message to the target PFS (which might be one of many belonging
51 * to the same cluster), by specifying that msgid as the linkid in any
52 * message we send to the target PFS.
53 *
54 * Similarly the msgid we allocate for any LNK_SPAN transaction we transmit
55 * (and remember we will maintain multiple open LNK_SPAN transactions on
56 * each connection representing the topology span, so every node sees every
57 * other node as a separate open transaction). So, similarly the msgid for
58 * these active transactions which we initiated can be used by the other
59 * end to route messages through us to another node, ultimately winding up
60 * at the identified hammer2 PFS. We have to adjust the spanid in the message
61 * header at each hop to be representative of the outgoing LNK_SPAN we
62 * are forwarding the message through.
63 *
64 * --
65 *
66 * If we were to retransmit every LNK_SPAN transaction we receive it would
67 * create a huge mess, so we have to aggregate all received LNK_SPAN
68 * transactions, sort them by the fsid (the cluster) and sub-sort them by
69 * the pfs_fsid (individual nodes in the cluster), and only retransmit
7dc0f844 70 * (create outgoing transactions) for a subset of the nearest distance-hops
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71 * for each individual node.
72 *
73 * The higher level protocols can then issue transactions to the nodes making
74 * up a cluster to perform all actions required.
75 *
76 * --
77 *
78 * Since this is a large topology and a spanning tree protocol, links can
79 * go up and down all the time. Any time a link goes down its transaction
80 * is closed. The transaction has to be closed on both ends before we can
81 * delete (and potentially reuse) the related spanid. The LNK_SPAN being
82 * closed may have been propagated out to other connections and those related
83 * LNK_SPANs are also closed. Ultimately all routes via the lost LNK_SPAN
84 * go away, ultimately reaching all sources and all targets.
85 *
86 * Any messages in-transit using a route that goes away will be thrown away.
87 * Open transactions are only tracked at the two end-points. When a link
88 * failure propagates to an end-point the related open transactions lose
89 * their spanid and are automatically aborted.
90 *
91 * It is important to note that internal route nodes cannot just associate
92 * a lost LNK_SPAN transaction with another route to the same destination.
93 * Message transactions MUST be serialized and MUST be ordered. All messages
94 * for a transaction must run over the same route. So if the route used by
95 * an active transaction is lost, the related messages will be fully aborted
96 * and the higher protocol levels will retry as appropriate.
97 *
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98 * FULLY ABORTING A ROUTED MESSAGE is handled via link-failure propagation
99 * back to the originator. Only the originator keeps tracks of a message.
100 * Routers just pass it through. If a route is lost during transit the
101 * message is simply thrown away.
102 *
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103 * It is also important to note that several paths to the same PFS can be
104 * propagated along the same link, which allows concurrency and even
105 * redundancy over several network interfaces or via different routes through
106 * the topology. Any given transaction will use only a single route but busy
107 * servers will often have hundreds of transactions active simultaniously,
108 * so having multiple active paths through the network topology for A<->B
109 * will improve performance.
110 *
111 * --
112 *
113 * Most protocols consolidate operations rather than simply relaying them.
114 * This is particularly true of LEAF protocols (such as strict HAMMER2
115 * clients), of which there can be millions connecting into the cluster at
116 * various points. The SPAN protocol is not used for these LEAF elements.
117 *
118 * Instead the primary service they connect to implements a proxy for the
119 * client protocols so the core topology only has to propagate a couple of
120 * LNK_SPANs and not millions. LNK_SPANs are meant to be used only for
121 * core master nodes and satellite slaves and cache nodes.
122 */
123
124#include "hammer2.h"
125
126/*
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127 * Maximum spanning tree distance. This has the practical effect of
128 * stopping tail-chasing closed loops when a feeder span is lost.
129 */
130#define HAMMER2_SPAN_MAXDIST 16
131
132/*
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133 * RED-BLACK TREE DEFINITIONS
134 *
7dc0f844 135 * We need to track:
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136 *
137 * (1) shared fsid's (a cluster).
138 * (2) unique fsid's (a node in a cluster) <--- LNK_SPAN transactions.
139 *
140 * We need to aggegate all active LNK_SPANs, aggregate, and create our own
141 * outgoing LNK_SPAN transactions on each of our connections representing
142 * the aggregated state.
143 *
2063f4d7 144 * h2span_conn - list of iocom connections who wish to receive SPAN
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145 * propagation from other connections. Might contain
146 * a filter string. Only iocom's with an open
147 * LNK_CONN transactions are applicable for SPAN
148 * propagation.
149 *
150 * h2span_relay - List of links relayed (via SPAN). Essentially
151 * each relay structure represents a LNK_SPAN
152 * transaction that we initiated, verses h2span_link
153 * which is a LNK_SPAN transaction that we received.
154 *
155 * --
156 *
157 * h2span_cluster - Organizes the shared fsid's. One structure for
158 * each cluster.
159 *
160 * h2span_node - Organizes the nodes in a cluster. One structure
161 * for each unique {cluster,node}, aka {fsid, pfs_fsid}.
162 *
163 * h2span_link - Organizes all incoming and outgoing LNK_SPAN message
164 * transactions related to a node.
165 *
166 * One h2span_link structure for each incoming LNK_SPAN
167 * transaction. Links selected for propagation back
168 * out are also where the outgoing LNK_SPAN messages
169 * are indexed into (so we can propagate changes).
170 *
171 * The h2span_link's use a red-black tree to sort the
7dc0f844 172 * distance hop metric for the incoming LNK_SPAN. We
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173 * then select the top N for outgoing. When the
174 * topology changes the top N may also change and cause
175 * new outgoing LNK_SPAN transactions to be opened
176 * and less desireable ones to be closed, causing
177 * transactional aborts within the message flow in
178 * the process.
179 *
180 * Also note - All outgoing LNK_SPAN message transactions are also
181 * entered into a red-black tree for use by the routing
182 * function. This is handled by msg.c in the state
183 * code, not here.
184 */
185
186struct h2span_link;
187struct h2span_relay;
1a34728c 188TAILQ_HEAD(h2span_media_queue, h2span_media);
2063f4d7 189TAILQ_HEAD(h2span_conn_queue, h2span_conn);
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190TAILQ_HEAD(h2span_relay_queue, h2span_relay);
191
192RB_HEAD(h2span_cluster_tree, h2span_cluster);
193RB_HEAD(h2span_node_tree, h2span_node);
194RB_HEAD(h2span_link_tree, h2span_link);
195RB_HEAD(h2span_relay_tree, h2span_relay);
196
197/*
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198 * This represents a media
199 */
200struct h2span_media {
201 TAILQ_ENTRY(h2span_media) entry;
202 uuid_t mediaid;
203 int refs;
204 struct h2span_media_config {
205 hammer2_copy_data_t copy_run;
206 hammer2_copy_data_t copy_pend;
207 pthread_t thread;
208 pthread_cond_t cond;
209 int ctl;
210 int fd;
211 hammer2_iocom_t iocom;
212 pthread_t iocom_thread;
213 enum { H2MC_STOPPED, H2MC_CONNECT, H2MC_RUNNING } state;
214 } config[HAMMER2_COPYID_COUNT];
215};
216
217typedef struct h2span_media_config h2span_media_config_t;
218
219#define H2CONFCTL_STOP 0x00000001
220#define H2CONFCTL_UPDATE 0x00000002
221
222/*
8c280d5d 223 * Received LNK_CONN transaction enables SPAN protocol over connection.
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224 * (may contain filter). Typically one for each mount and several may
225 * share the same media.
8c280d5d 226 */
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227struct h2span_conn {
228 TAILQ_ENTRY(h2span_conn) entry;
8c280d5d 229 struct h2span_relay_tree tree;
1a34728c 230 struct h2span_media *media;
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231 hammer2_state_t *state;
232};
233
234/*
235 * All received LNK_SPANs are organized by cluster (pfs_clid),
236 * node (pfs_fsid), and link (received LNK_SPAN transaction).
237 */
238struct h2span_cluster {
239 RB_ENTRY(h2span_cluster) rbnode;
240 struct h2span_node_tree tree;
241 uuid_t pfs_clid; /* shared fsid */
90e8cd1d 242 int refs; /* prevents destruction */
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243};
244
7dc0f844 245struct h2span_node {
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246 RB_ENTRY(h2span_node) rbnode;
247 struct h2span_link_tree tree;
248 struct h2span_cluster *cls;
249 uuid_t pfs_fsid; /* unique fsid */
81666e1b 250 char label[64];
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251};
252
253struct h2span_link {
254 RB_ENTRY(h2span_link) rbnode;
255 hammer2_state_t *state; /* state<->link */
256 struct h2span_node *node; /* related node */
7dc0f844 257 int32_t dist;
8c280d5d 258 struct h2span_relay_queue relayq; /* relay out */
90e8cd1d 259 struct hammer2_router *router; /* route out this link */
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260};
261
262/*
263 * Any LNK_SPAN transactions we receive which are relayed out other
264 * connections utilize this structure to track the LNK_SPAN transaction
265 * we initiate on the other connections, if selected for relay.
266 *
267 * In many respects this is the core of the protocol... actually figuring
268 * out what LNK_SPANs to relay. The spanid used for relaying is the
269 * address of the 'state' structure, which is why h2span_relay has to
2063f4d7 270 * be entered into a RB-TREE based at h2span_conn (so we can look
8c280d5d 271 * up the spanid to validate it).
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272 *
273 * NOTE: Messages can be received via the LNK_SPAN transaction the
274 * relay maintains, and can be replied via relay->router, but
275 * messages are NOT initiated via a relay. Messages are initiated
276 * via incoming links (h2span_link's).
277 *
278 * relay->link represents the link being relayed, NOT the LNK_SPAN
279 * transaction the relay is holding open.
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280 */
281struct h2span_relay {
2063f4d7 282 RB_ENTRY(h2span_relay) rbnode; /* from h2span_conn */
8c280d5d 283 TAILQ_ENTRY(h2span_relay) entry; /* from link */
2063f4d7 284 struct h2span_conn *conn;
8c280d5d 285 hammer2_state_t *state; /* transmitted LNK_SPAN */
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286 struct h2span_link *link; /* LNK_SPAN being relayed */
287 struct hammer2_router *router;/* route out this relay */
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288};
289
290
1a34728c 291typedef struct h2span_media h2span_media_t;
2063f4d7 292typedef struct h2span_conn h2span_conn_t;
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293typedef struct h2span_cluster h2span_cluster_t;
294typedef struct h2span_node h2span_node_t;
295typedef struct h2span_link h2span_link_t;
296typedef struct h2span_relay h2span_relay_t;
297
298static
299int
300h2span_cluster_cmp(h2span_cluster_t *cls1, h2span_cluster_t *cls2)
301{
302 return(uuid_compare(&cls1->pfs_clid, &cls2->pfs_clid, NULL));
303}
304
305static
306int
307h2span_node_cmp(h2span_node_t *node1, h2span_node_t *node2)
308{
309 return(uuid_compare(&node1->pfs_fsid, &node2->pfs_fsid, NULL));
310}
311
cf715800 312/*
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313 * Sort/subsort must match h2span_relay_cmp() under any given node
314 * to make the aggregation algorithm easier, so the best links are
315 * in the same sorted order as the best relays.
316 *
317 * NOTE: We cannot use link*->state->msgid because this msgid is created
318 * by each remote host and thus might wind up being the same.
cf715800 319 */
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320static
321int
322h2span_link_cmp(h2span_link_t *link1, h2span_link_t *link2)
323{
7dc0f844 324 if (link1->dist < link2->dist)
8c280d5d 325 return(-1);
7dc0f844 326 if (link1->dist > link2->dist)
8c280d5d 327 return(1);
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328#if 1
329 if ((uintptr_t)link1->state < (uintptr_t)link2->state)
330 return(-1);
331 if ((uintptr_t)link1->state > (uintptr_t)link2->state)
332 return(1);
333#else
29ead430 334 if (link1->state->msgid < link2->state->msgid)
8c280d5d 335 return(-1);
29ead430 336 if (link1->state->msgid > link2->state->msgid)
8c280d5d 337 return(1);
10c86c4e 338#endif
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339 return(0);
340}
341
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342/*
343 * Relay entries are sorted by node, subsorted by distance and link
344 * address (so we can match up the conn->tree relay topology with
345 * a node's link topology).
346 */
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347static
348int
349h2span_relay_cmp(h2span_relay_t *relay1, h2span_relay_t *relay2)
350{
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351 h2span_link_t *link1 = relay1->link;
352 h2span_link_t *link2 = relay2->link;
353
354 if ((intptr_t)link1->node < (intptr_t)link2->node)
7dc0f844 355 return(-1);
29ead430 356 if ((intptr_t)link1->node > (intptr_t)link2->node)
7dc0f844 357 return(1);
29ead430 358 if (link1->dist < link2->dist)
8c280d5d 359 return(-1);
29ead430 360 if (link1->dist > link2->dist)
7dc0f844 361 return(1);
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362#if 1
363 if ((uintptr_t)link1->state < (uintptr_t)link2->state)
364 return(-1);
365 if ((uintptr_t)link1->state > (uintptr_t)link2->state)
366 return(1);
367#else
29ead430 368 if (link1->state->msgid < link2->state->msgid)
7dc0f844 369 return(-1);
29ead430 370 if (link1->state->msgid > link2->state->msgid)
8c280d5d 371 return(1);
10c86c4e 372#endif
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373 return(0);
374}
375
376RB_PROTOTYPE_STATIC(h2span_cluster_tree, h2span_cluster,
377 rbnode, h2span_cluster_cmp);
378RB_PROTOTYPE_STATIC(h2span_node_tree, h2span_node,
379 rbnode, h2span_node_cmp);
380RB_PROTOTYPE_STATIC(h2span_link_tree, h2span_link,
381 rbnode, h2span_link_cmp);
382RB_PROTOTYPE_STATIC(h2span_relay_tree, h2span_relay,
383 rbnode, h2span_relay_cmp);
384
385RB_GENERATE_STATIC(h2span_cluster_tree, h2span_cluster,
386 rbnode, h2span_cluster_cmp);
387RB_GENERATE_STATIC(h2span_node_tree, h2span_node,
388 rbnode, h2span_node_cmp);
389RB_GENERATE_STATIC(h2span_link_tree, h2span_link,
390 rbnode, h2span_link_cmp);
391RB_GENERATE_STATIC(h2span_relay_tree, h2span_relay,
392 rbnode, h2span_relay_cmp);
393
394/*
1a34728c 395 * Global mutex protects cluster_tree lookups, connq, mediaq.
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396 */
397static pthread_mutex_t cluster_mtx;
398static struct h2span_cluster_tree cluster_tree = RB_INITIALIZER(cluster_tree);
2063f4d7 399static struct h2span_conn_queue connq = TAILQ_HEAD_INITIALIZER(connq);
1a34728c 400static struct h2span_media_queue mediaq = TAILQ_HEAD_INITIALIZER(mediaq);
8c280d5d 401
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402static void hammer2_lnk_span(hammer2_msg_t *msg);
403static void hammer2_lnk_conn(hammer2_msg_t *msg);
404static void hammer2_lnk_relay(hammer2_msg_t *msg);
2063f4d7 405static void hammer2_relay_scan(h2span_conn_t *conn, h2span_node_t *node);
7dc0f844 406static void hammer2_relay_delete(h2span_relay_t *relay);
8c280d5d 407
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408static void *hammer2_volconf_thread(void *info);
409static void hammer2_volconf_stop(h2span_media_config_t *conf);
410static void hammer2_volconf_start(h2span_media_config_t *conf,
411 const char *hostname);
412
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413void
414hammer2_msg_lnk_signal(hammer2_router_t *router __unused)
415{
416 pthread_mutex_lock(&cluster_mtx);
417 hammer2_relay_scan(NULL, NULL);
418 pthread_mutex_unlock(&cluster_mtx);
419}
420
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421/*
422 * Receive a HAMMER2_MSG_PROTO_LNK message. This only called for
423 * one-way and opening-transactions since state->func will be assigned
424 * in all other cases.
425 */
426void
29ead430 427hammer2_msg_lnk(hammer2_msg_t *msg)
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428{
429 switch(msg->any.head.cmd & HAMMER2_MSGF_BASECMDMASK) {
430 case HAMMER2_LNK_CONN:
29ead430 431 hammer2_lnk_conn(msg);
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432 break;
433 case HAMMER2_LNK_SPAN:
29ead430 434 hammer2_lnk_span(msg);
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435 break;
436 default:
437 fprintf(stderr,
438 "MSG_PROTO_LNK: Unknown msg %08x\n", msg->any.head.cmd);
29ead430 439 hammer2_msg_reply(msg, HAMMER2_MSG_ERR_NOSUPP);
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440 /* state invalid after reply */
441 break;
442 }
443}
444
445void
29ead430 446hammer2_lnk_conn(hammer2_msg_t *msg)
8c280d5d 447{
29ead430 448 hammer2_state_t *state = msg->state;
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449 h2span_media_t *media;
450 h2span_media_config_t *conf;
2063f4d7 451 h2span_conn_t *conn;
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452 h2span_relay_t *relay;
453 char *alloc = NULL;
1a34728c 454 int i;
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455
456 pthread_mutex_lock(&cluster_mtx);
457
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458 switch(msg->any.head.cmd & HAMMER2_MSGF_TRANSMASK) {
459 case HAMMER2_LNK_CONN | HAMMER2_MSGF_CREATE:
460 case HAMMER2_LNK_CONN | HAMMER2_MSGF_CREATE | HAMMER2_MSGF_DELETE:
461 /*
2063f4d7 462 * On transaction start we allocate a new h2span_conn and
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463 * acknowledge the request, leaving the transaction open.
464 * We then relay priority-selected SPANs.
465 */
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466 fprintf(stderr, "LNK_CONN(%08x): %s/%s\n",
467 (uint32_t)msg->any.head.msgid,
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468 hammer2_uuid_to_str(&msg->any.lnk_conn.pfs_clid,
469 &alloc),
470 msg->any.lnk_conn.label);
471 free(alloc);
472
473 conn = hammer2_alloc(sizeof(*conn));
474
475 RB_INIT(&conn->tree);
476 conn->state = state;
1a34728c 477 state->func = hammer2_lnk_conn;
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478 state->any.conn = conn;
479 TAILQ_INSERT_TAIL(&connq, conn, entry);
480
02454b3e 481 /*
1a34728c 482 * Set up media
02454b3e 483 */
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484 TAILQ_FOREACH(media, &mediaq, entry) {
485 if (uuid_compare(&msg->any.lnk_conn.mediaid,
486 &media->mediaid, NULL) == 0) {
487 break;
488 }
489 }
490 if (media == NULL) {
491 media = hammer2_alloc(sizeof(*media));
492 media->mediaid = msg->any.lnk_conn.mediaid;
493 TAILQ_INSERT_TAIL(&mediaq, media, entry);
494 }
495 conn->media = media;
496 ++media->refs;
8c280d5d 497
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498 if ((msg->any.head.cmd & HAMMER2_MSGF_DELETE) == 0) {
499 hammer2_msg_result(msg, 0);
500 hammer2_router_signal(msg->router);
501 break;
502 }
503 /* FALL THROUGH */
504 case HAMMER2_LNK_CONN | HAMMER2_MSGF_DELETE:
505 case HAMMER2_LNK_ERROR | HAMMER2_MSGF_DELETE:
506deleteconn:
507 /*
2063f4d7 508 * On transaction terminate we clean out our h2span_conn
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509 * and acknowledge the request, closing the transaction.
510 */
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511 fprintf(stderr, "LNK_CONN: Terminated\n");
512 conn = state->any.conn;
513 assert(conn);
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514
515 /*
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516 * Clean out the media structure. If refs drops to zero we
517 * also clean out the media config threads. These threads
518 * maintain span connections to other hammer2 service daemons.
519 */
520 media = conn->media;
521 if (--media->refs == 0) {
522 fprintf(stderr, "Shutting down media spans\n");
523 for (i = 0; i < HAMMER2_COPYID_COUNT; ++i) {
524 conf = &media->config[i];
525
526 if (conf->thread == NULL)
527 continue;
528 conf->ctl = H2CONFCTL_STOP;
529 pthread_cond_signal(&conf->cond);
530 }
531 for (i = 0; i < HAMMER2_COPYID_COUNT; ++i) {
532 conf = &media->config[i];
533
534 if (conf->thread == NULL)
535 continue;
536 pthread_mutex_unlock(&cluster_mtx);
537 pthread_join(conf->thread, NULL);
538 pthread_mutex_lock(&cluster_mtx);
539 conf->thread = NULL;
540 pthread_cond_destroy(&conf->cond);
541 }
542 fprintf(stderr, "Media shutdown complete\n");
543 TAILQ_REMOVE(&mediaq, media, entry);
544 hammer2_free(media);
545 }
546
547 /*
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548 * Clean out all relays. This requires terminating each
549 * relay transaction.
550 */
8c280d5d 551 while ((relay = RB_ROOT(&conn->tree)) != NULL) {
7dc0f844 552 hammer2_relay_delete(relay);
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553 }
554
555 /*
556 * Clean out conn
557 */
1a34728c 558 conn->media = NULL;
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559 conn->state = NULL;
560 msg->state->any.conn = NULL;
561 TAILQ_REMOVE(&connq, conn, entry);
562 hammer2_free(conn);
563
29ead430 564 hammer2_msg_reply(msg, 0);
8c280d5d 565 /* state invalid after reply */
1a34728c
MD
566 break;
567 case HAMMER2_LNK_VOLCONF:
568 /*
569 * One-way volume-configuration message is transmitted
570 * over the open LNK_CONN transaction.
571 */
572 fprintf(stderr, "RECEIVED VOLCONF\n");
573 if (msg->any.lnk_volconf.index < 0 ||
574 msg->any.lnk_volconf.index >= HAMMER2_COPYID_COUNT) {
575 fprintf(stderr, "VOLCONF: ILLEGAL INDEX %d\n",
576 msg->any.lnk_volconf.index);
577 break;
578 }
579 if (msg->any.lnk_volconf.copy.path[sizeof(msg->any.lnk_volconf.copy.path) - 1] != 0 ||
580 msg->any.lnk_volconf.copy.path[0] == 0) {
581 fprintf(stderr, "VOLCONF: ILLEGAL PATH %d\n",
582 msg->any.lnk_volconf.index);
583 break;
584 }
585 conn = msg->state->any.conn;
586 if (conn == NULL) {
587 fprintf(stderr, "VOLCONF: LNK_CONN is missing\n");
588 break;
589 }
590 conf = &conn->media->config[msg->any.lnk_volconf.index];
591 conf->copy_pend = msg->any.lnk_volconf.copy;
592 conf->ctl |= H2CONFCTL_UPDATE;
593 if (conf->thread == NULL) {
594 fprintf(stderr, "VOLCONF THREAD STARTED\n");
595 pthread_cond_init(&conf->cond, NULL);
596 pthread_create(&conf->thread, NULL,
597 hammer2_volconf_thread, (void *)conf);
598 }
599 pthread_cond_signal(&conf->cond);
600 break;
601 default:
602 /*
603 * Failsafe
604 */
605 if (msg->any.head.cmd & HAMMER2_MSGF_DELETE)
606 goto deleteconn;
607 hammer2_msg_reply(msg, HAMMER2_MSG_ERR_NOSUPP);
608 break;
8c280d5d
MD
609 }
610 pthread_mutex_unlock(&cluster_mtx);
611}
612
613void
29ead430 614hammer2_lnk_span(hammer2_msg_t *msg)
8c280d5d 615{
29ead430 616 hammer2_state_t *state = msg->state;
8c280d5d
MD
617 h2span_cluster_t dummy_cls;
618 h2span_node_t dummy_node;
619 h2span_cluster_t *cls;
620 h2span_node_t *node;
621 h2span_link_t *slink;
622 h2span_relay_t *relay;
623 char *alloc = NULL;
624
29ead430
MD
625 assert((msg->any.head.cmd & HAMMER2_MSGF_REPLY) == 0);
626
8c280d5d
MD
627 pthread_mutex_lock(&cluster_mtx);
628
629 /*
630 * On transaction start we initialize the tracking infrastructure
631 */
632 if (msg->any.head.cmd & HAMMER2_MSGF_CREATE) {
29ead430 633 assert(state->func == NULL);
8c280d5d
MD
634 state->func = hammer2_lnk_span;
635
81666e1b
MD
636 msg->any.lnk_span.label[sizeof(msg->any.lnk_span.label)-1] = 0;
637
8c280d5d
MD
638 /*
639 * Find the cluster
640 */
641 dummy_cls.pfs_clid = msg->any.lnk_span.pfs_clid;
642 cls = RB_FIND(h2span_cluster_tree, &cluster_tree, &dummy_cls);
643 if (cls == NULL) {
644 cls = hammer2_alloc(sizeof(*cls));
645 cls->pfs_clid = msg->any.lnk_span.pfs_clid;
646 RB_INIT(&cls->tree);
647 RB_INSERT(h2span_cluster_tree, &cluster_tree, cls);
648 }
649
650 /*
651 * Find the node
652 */
653 dummy_node.pfs_fsid = msg->any.lnk_span.pfs_fsid;
654 node = RB_FIND(h2span_node_tree, &cls->tree, &dummy_node);
655 if (node == NULL) {
656 node = hammer2_alloc(sizeof(*node));
657 node->pfs_fsid = msg->any.lnk_span.pfs_fsid;
658 node->cls = cls;
659 RB_INIT(&node->tree);
660 RB_INSERT(h2span_node_tree, &cls->tree, node);
81666e1b
MD
661 snprintf(node->label, sizeof(node->label),
662 "%s", msg->any.lnk_span.label);
8c280d5d
MD
663 }
664
665 /*
666 * Create the link
667 */
668 assert(state->any.link == NULL);
669 slink = hammer2_alloc(sizeof(*slink));
7dc0f844 670 TAILQ_INIT(&slink->relayq);
8c280d5d 671 slink->node = node;
7dc0f844 672 slink->dist = msg->any.lnk_span.dist;
8c280d5d
MD
673 slink->state = state;
674 state->any.link = slink;
29ead430
MD
675
676 /*
677 * Embedded router structure in link for message forwarding.
90e8cd1d
MD
678 *
679 * The spanning id for the router is the message id of
680 * the SPAN link it is embedded in, allowing messages to
681 * be routed via &slink->router.
29ead430 682 */
90e8cd1d
MD
683 slink->router = hammer2_router_alloc();
684 slink->router->iocom = state->iocom;
685 slink->router->link = slink;
10c86c4e 686 slink->router->target = state->msgid;
90e8cd1d 687 hammer2_router_connect(slink->router);
29ead430 688
8c280d5d
MD
689 RB_INSERT(h2span_link_tree, &node->tree, slink);
690
29ead430
MD
691 fprintf(stderr, "LNK_SPAN(thr %p): %p %s/%s dist=%d\n",
692 msg->router->iocom,
693 slink,
694 hammer2_uuid_to_str(&msg->any.lnk_span.pfs_clid,
695 &alloc),
696 msg->any.lnk_span.label,
697 msg->any.lnk_span.dist);
698 free(alloc);
29ead430 699#if 0
02454b3e 700 hammer2_relay_scan(NULL, node);
29ead430
MD
701#endif
702 hammer2_router_signal(msg->router);
8c280d5d
MD
703 }
704
705 /*
706 * On transaction terminate we remove the tracking infrastructure.
707 */
708 if (msg->any.head.cmd & HAMMER2_MSGF_DELETE) {
709 slink = state->any.link;
710 assert(slink != NULL);
711 node = slink->node;
712 cls = node->cls;
713
29ead430
MD
714 fprintf(stderr, "LNK_DELE(thr %p): %p %s/%s dist=%d\n",
715 msg->router->iocom,
716 slink,
717 hammer2_uuid_to_str(&cls->pfs_clid, &alloc),
718 state->msg->any.lnk_span.label,
719 state->msg->any.lnk_span.dist);
720 free(alloc);
721
8c280d5d 722 /*
90e8cd1d
MD
723 * Remove the router from consideration
724 */
725 hammer2_router_disconnect(&slink->router);
726
727 /*
7dc0f844
MD
728 * Clean out all relays. This requires terminating each
729 * relay transaction.
8c280d5d
MD
730 */
731 while ((relay = TAILQ_FIRST(&slink->relayq)) != NULL) {
7dc0f844 732 hammer2_relay_delete(relay);
8c280d5d
MD
733 }
734
735 /*
736 * Clean out the topology
737 */
738 RB_REMOVE(h2span_link_tree, &node->tree, slink);
739 if (RB_EMPTY(&node->tree)) {
740 RB_REMOVE(h2span_node_tree, &cls->tree, node);
90e8cd1d 741 if (RB_EMPTY(&cls->tree) && cls->refs == 0) {
8c280d5d
MD
742 RB_REMOVE(h2span_cluster_tree,
743 &cluster_tree, cls);
744 hammer2_free(cls);
745 }
746 node->cls = NULL;
747 hammer2_free(node);
7dc0f844 748 node = NULL;
8c280d5d
MD
749 }
750 state->any.link = NULL;
751 slink->state = NULL;
752 slink->node = NULL;
753 hammer2_free(slink);
7dc0f844
MD
754
755 /*
756 * We have to terminate the transaction
757 */
758 hammer2_state_reply(state, 0);
759 /* state invalid after reply */
760
761 /*
762 * If the node still exists issue any required updates. If
763 * it doesn't then all related relays have already been
764 * removed and there's nothing left to do.
765 */
29ead430 766#if 0
7dc0f844 767 if (node)
02454b3e 768 hammer2_relay_scan(NULL, node);
29ead430
MD
769#endif
770 if (node)
771 hammer2_router_signal(msg->router);
8c280d5d
MD
772 }
773
774 pthread_mutex_unlock(&cluster_mtx);
775}
776
777/*
7dc0f844
MD
778 * Messages received on relay SPANs. These are open transactions so it is
779 * in fact possible for the other end to close the transaction.
780 *
781 * XXX MPRACE on state structure
782 */
783static void
29ead430 784hammer2_lnk_relay(hammer2_msg_t *msg)
7dc0f844 785{
29ead430 786 hammer2_state_t *state = msg->state;
7dc0f844
MD
787 h2span_relay_t *relay;
788
29ead430
MD
789 assert(msg->any.head.cmd & HAMMER2_MSGF_REPLY);
790
7dc0f844
MD
791 if (msg->any.head.cmd & HAMMER2_MSGF_DELETE) {
792 pthread_mutex_lock(&cluster_mtx);
793 if ((relay = state->any.relay) != NULL) {
794 hammer2_relay_delete(relay);
795 } else {
796 hammer2_state_reply(state, 0);
797 }
798 pthread_mutex_unlock(&cluster_mtx);
799 }
800}
801
802/*
803 * Update relay transactions for SPANs.
804 *
805 * Called with cluster_mtx held.
806 */
02454b3e 807static void hammer2_relay_scan_specific(h2span_node_t *node,
2063f4d7 808 h2span_conn_t *conn);
7dc0f844
MD
809
810static void
2063f4d7 811hammer2_relay_scan(h2span_conn_t *conn, h2span_node_t *node)
7dc0f844
MD
812{
813 h2span_cluster_t *cls;
7dc0f844
MD
814
815 if (node) {
816 /*
817 * Iterate specific node
818 */
819 TAILQ_FOREACH(conn, &connq, entry)
02454b3e 820 hammer2_relay_scan_specific(node, conn);
7dc0f844
MD
821 } else {
822 /*
02454b3e 823 * Full iteration.
7dc0f844 824 *
02454b3e
MD
825 * Iterate cluster ids, nodes, and either a specific connection
826 * or all connections.
7dc0f844 827 */
7dc0f844
MD
828 RB_FOREACH(cls, h2span_cluster_tree, &cluster_tree) {
829 /*
830 * Iterate node ids
831 */
832 RB_FOREACH(node, h2span_node_tree, &cls->tree) {
833 /*
834 * Synchronize the node's link (received SPANs)
835 * with each connection's relays.
836 */
02454b3e
MD
837 if (conn) {
838 hammer2_relay_scan_specific(node, conn);
839 } else {
840 TAILQ_FOREACH(conn, &connq, entry) {
841 hammer2_relay_scan_specific(node,
842 conn);
843 }
844 assert(conn == NULL);
845 }
7dc0f844
MD
846 }
847 }
848 }
849}
850
851/*
852 * Update the relay'd SPANs for this (node, conn).
853 *
854 * Iterate links and adjust relays to match. We only propagate the top link
855 * for now (XXX we want to propagate the top two).
856 *
857 * The hammer2_relay_scan_cmp() function locates the first relay element
858 * for any given node. The relay elements will be sub-sorted by dist.
8c280d5d 859 */
7dc0f844
MD
860struct relay_scan_info {
861 h2span_node_t *node;
862 h2span_relay_t *relay;
863};
864
865static int
866hammer2_relay_scan_cmp(h2span_relay_t *relay, void *arg)
867{
868 struct relay_scan_info *info = arg;
869
870 if ((intptr_t)relay->link->node < (intptr_t)info->node)
871 return(-1);
872 if ((intptr_t)relay->link->node > (intptr_t)info->node)
873 return(1);
874 return(0);
875}
876
877static int
878hammer2_relay_scan_callback(h2span_relay_t *relay, void *arg)
879{
880 struct relay_scan_info *info = arg;
881
882 info->relay = relay;
883 return(-1);
884}
885
8c280d5d 886static void
2063f4d7 887hammer2_relay_scan_specific(h2span_node_t *node, h2span_conn_t *conn)
8c280d5d 888{
7dc0f844
MD
889 struct relay_scan_info info;
890 h2span_relay_t *relay;
891 h2span_relay_t *next_relay;
892 h2span_link_t *slink;
2063f4d7
MD
893 hammer2_lnk_conn_t *lconn;
894 hammer2_msg_t *msg;
7dc0f844 895 int count = 2;
2063f4d7 896 uint8_t peer_type;
7dc0f844
MD
897
898 info.node = node;
899 info.relay = NULL;
900
901 /*
29ead430
MD
902 * Locate the first related relay for the node on this connection.
903 * relay will be NULL if there were none.
7dc0f844
MD
904 */
905 RB_SCAN(h2span_relay_tree, &conn->tree,
906 hammer2_relay_scan_cmp, hammer2_relay_scan_callback, &info);
907 relay = info.relay;
cf715800
MD
908 info.relay = NULL;
909 if (relay)
910 assert(relay->link->node == node);
7dc0f844 911
81666e1b
MD
912 if (DebugOpt > 8)
913 fprintf(stderr, "relay scan for connection %p\n", conn);
7dc0f844
MD
914
915 /*
916 * Iterate the node's links (received SPANs) in distance order,
917 * lowest (best) dist first.
2063f4d7
MD
918 *
919 * PROPAGATE THE BEST LINKS OVER THE SPECIFIED CONNECTION.
920 *
921 * Track relays while iterating the best links and construct
922 * missing relays when necessary.
923 *
924 * (If some prior better link was removed it would have also
925 * removed the relay, so the relay can only match exactly or
926 * be worse).
7dc0f844
MD
927 */
928 RB_FOREACH(slink, h2span_link_tree, &node->tree) {
929 /*
2063f4d7
MD
930 * Match, relay already in-place, get the next
931 * relay to match against the next slink.
7dc0f844 932 */
cf715800 933 if (relay && relay->link == slink) {
cf715800
MD
934 relay = RB_NEXT(h2span_relay_tree, &conn->tree, relay);
935 if (--count == 0)
936 break;
2063f4d7
MD
937 continue;
938 }
939
940 /*
941 * We might want this SLINK, if it passes our filters.
942 *
943 * The spanning tree can cause closed loops so we have
944 * to limit slink->dist.
945 */
946 if (slink->dist > HAMMER2_SPAN_MAXDIST)
29ead430 947 break;
2063f4d7
MD
948
949 /*
950 * Don't bother transmitting a LNK_SPAN out the same
951 * connection it came in on. Trivial optimization.
952 */
953 if (slink->state->iocom == conn->state->iocom)
c1963fb2 954 break;
7dc0f844 955
2063f4d7
MD
956 /*
957 * NOTE ON FILTERS: The protocol spec allows non-requested
958 * SPANs to be transmitted, the other end is expected to
959 * leave their transactions open but otherwise ignore them.
960 *
961 * Don't bother transmitting if the remote connection
962 * is not accepting this SPAN's peer_type.
963 */
964 peer_type = slink->state->msg->any.lnk_span.peer_type;
965 lconn = &conn->state->msg->any.lnk_conn;
966 if (((1LLU << peer_type) & lconn->peer_mask) == 0)
967 break;
968
969 /*
970 * Filter based on pfs_clid or label (XXX). This typically
971 * reduces the amount of SPAN traffic that a mount end-point
972 * sees by only passing along SPANs related to the cluster id
973 * (that is, it will see all PFS's associated with the
974 * particular cluster it represents).
975 */
976 if (peer_type == lconn->peer_type &&
977 peer_type == HAMMER2_PEER_HAMMER2) {
978 if (!uuid_is_nil(&slink->node->cls->pfs_clid, NULL) &&
979 uuid_compare(&slink->node->cls->pfs_clid,
980 &lconn->pfs_clid, NULL) != 0) {
cf715800 981 break;
2063f4d7 982 }
7dc0f844 983 }
2063f4d7
MD
984
985 /*
986 * Ok, we've accepted this SPAN for relaying.
987 */
988 assert(relay == NULL ||
989 relay->link->node != slink->node ||
990 relay->link->dist >= slink->dist);
991 relay = hammer2_alloc(sizeof(*relay));
992 relay->conn = conn;
993 relay->link = slink;
994
995 msg = hammer2_msg_alloc(conn->state->iocom->router, 0,
996 HAMMER2_LNK_SPAN |
997 HAMMER2_MSGF_CREATE,
998 hammer2_lnk_relay, relay);
999 relay->state = msg->state;
1000 relay->router = hammer2_router_alloc();
1001 relay->router->iocom = relay->state->iocom;
1002 relay->router->relay = relay;
1003 relay->router->target = relay->state->msgid;
1004
1005 msg->any.lnk_span = slink->state->msg->any.lnk_span;
1006 msg->any.lnk_span.dist = slink->dist + 1;
1007
1008 hammer2_router_connect(relay->router);
1009
1010 RB_INSERT(h2span_relay_tree, &conn->tree, relay);
1011 TAILQ_INSERT_TAIL(&slink->relayq, relay, entry);
1012
1013 hammer2_msg_write(msg);
1014
1015 fprintf(stderr,
1016 "RELAY SPAN %p RELAY %p ON CLS=%p NODE=%p DIST=%d "
1017 "FD %d state %p\n",
1018 slink,
1019 relay,
1020 node->cls, node, slink->dist,
1021 conn->state->iocom->sock_fd, relay->state);
1022
1023 /*
1024 * Match (created new relay), get the next relay to
1025 * match against the next slink.
1026 */
1027 relay = RB_NEXT(h2span_relay_tree, &conn->tree, relay);
1028 if (--count == 0)
1029 break;
7dc0f844
MD
1030 }
1031
1032 /*
1033 * Any remaining relay's belonging to this connection which match
1034 * the node are in excess of the current aggregate spanning state
1035 * and should be removed.
1036 */
1037 while (relay && relay->link->node == node) {
1038 next_relay = RB_NEXT(h2span_relay_tree, &conn->tree, relay);
1039 hammer2_relay_delete(relay);
1040 relay = next_relay;
1041 }
1042}
1043
1044static
1045void
1046hammer2_relay_delete(h2span_relay_t *relay)
1047{
81666e1b 1048 fprintf(stderr,
29ead430
MD
1049 "RELAY DELETE %p RELAY %p ON CLS=%p NODE=%p DIST=%d FD %d STATE %p\n",
1050 relay->link,
1051 relay,
7dc0f844 1052 relay->link->node->cls, relay->link->node,
cf715800 1053 relay->link->dist,
7dc0f844 1054 relay->conn->state->iocom->sock_fd, relay->state);
7dc0f844 1055
90e8cd1d
MD
1056 hammer2_router_disconnect(&relay->router);
1057
7dc0f844
MD
1058 RB_REMOVE(h2span_relay_tree, &relay->conn->tree, relay);
1059 TAILQ_REMOVE(&relay->link->relayq, relay, entry);
1060
1061 if (relay->state) {
1062 relay->state->any.relay = NULL;
1063 hammer2_state_reply(relay->state, 0);
1064 /* state invalid after reply */
1065 relay->state = NULL;
1066 }
1067 relay->conn = NULL;
1068 relay->link = NULL;
1069 hammer2_free(relay);
8c280d5d 1070}
81666e1b 1071
1a34728c
MD
1072static void *
1073hammer2_volconf_thread(void *info)
1074{
1075 h2span_media_config_t *conf = info;
1076
1077 pthread_mutex_lock(&cluster_mtx);
1078 while ((conf->ctl & H2CONFCTL_STOP) == 0) {
1079 if (conf->ctl & H2CONFCTL_UPDATE) {
1080 fprintf(stderr, "VOLCONF UPDATE\n");
1081 conf->ctl &= ~H2CONFCTL_UPDATE;
1082 if (bcmp(&conf->copy_run, &conf->copy_pend,
1083 sizeof(conf->copy_run)) == 0) {
1084 fprintf(stderr, "VOLCONF: no changes\n");
1085 continue;
1086 }
1087 /*
1088 * XXX TODO - auto reconnect on lookup failure or
1089 * connect failure or stream failure.
1090 */
1091
1092 pthread_mutex_unlock(&cluster_mtx);
1093 hammer2_volconf_stop(conf);
1094 conf->copy_run = conf->copy_pend;
1095 if (conf->copy_run.copyid != 0 &&
1096 strncmp(conf->copy_run.path, "span:", 5) == 0) {
1097 hammer2_volconf_start(conf,
1098 conf->copy_run.path + 5);
1099 }
1100 pthread_mutex_lock(&cluster_mtx);
1101 fprintf(stderr, "VOLCONF UPDATE DONE state %d\n", conf->state);
1102 }
1103 if (conf->state == H2MC_CONNECT) {
1104 hammer2_volconf_start(conf, conf->copy_run.path + 5);
1105 pthread_mutex_unlock(&cluster_mtx);
1106 sleep(5);
1107 pthread_mutex_lock(&cluster_mtx);
1108 } else {
1109 pthread_cond_wait(&conf->cond, &cluster_mtx);
1110 }
1111 }
1112 pthread_mutex_unlock(&cluster_mtx);
1113 hammer2_volconf_stop(conf);
1114 return(NULL);
1115}
1116
1117static
1118void
1119hammer2_volconf_stop(h2span_media_config_t *conf)
1120{
1121 switch(conf->state) {
1122 case H2MC_STOPPED:
1123 break;
1124 case H2MC_CONNECT:
1125 conf->state = H2MC_STOPPED;
1126 break;
1127 case H2MC_RUNNING:
1128 shutdown(conf->fd, SHUT_WR);
1129 pthread_join(conf->iocom_thread, NULL);
1130 conf->iocom_thread = NULL;
1131 break;
1132 }
1133}
1134
1135static
1136void
1137hammer2_volconf_start(h2span_media_config_t *conf, const char *hostname)
1138{
e1648a68
MD
1139 hammer2_master_service_info_t *info;
1140
1a34728c
MD
1141 switch(conf->state) {
1142 case H2MC_STOPPED:
1143 case H2MC_CONNECT:
1144 conf->fd = hammer2_connect(hostname);
1145 if (conf->fd < 0) {
1146 fprintf(stderr, "Unable to connect to %s\n", hostname);
1147 conf->state = H2MC_CONNECT;
1148 } else {
e1648a68
MD
1149 info = malloc(sizeof(*info));
1150 bzero(info, sizeof(*info));
1151 info->fd = conf->fd;
1152 info->detachme = 0;
1a34728c 1153 conf->state = H2MC_RUNNING;
e1648a68
MD
1154 pthread_create(&conf->iocom_thread, NULL,
1155 master_service, info);
1a34728c
MD
1156 }
1157 break;
1158 case H2MC_RUNNING:
1159 break;
1160 }
1161}
1162
29ead430 1163/************************************************************************
90e8cd1d 1164 * ROUTER AND MESSAGING HANDLES *
29ead430
MD
1165 ************************************************************************
1166 *
90e8cd1d
MD
1167 * Basically the idea here is to provide a stable data structure which
1168 * can be localized to the caller for higher level protocols to work with.
1169 * Depends on the context, these hammer2_handle's can be pooled by use-case
1170 * and remain persistent through a client (or mount point's) life.
1171 */
1172
1173#if 0
1174/*
1175 * Obtain a stable handle on a cluster given its uuid. This ties directly
1176 * into the global cluster topology, creating the structure if necessary
1177 * (even if the uuid does not exist or does not exist yet), and preventing
1178 * the structure from getting ripped out from under us while we hold a
1179 * pointer to it.
1180 */
1181h2span_cluster_t *
1182hammer2_cluster_get(uuid_t *pfs_clid)
1183{
1184 h2span_cluster_t dummy_cls;
1185 h2span_cluster_t *cls;
1186
1187 dummy_cls.pfs_clid = *pfs_clid;
1188 pthread_mutex_lock(&cluster_mtx);
1189 cls = RB_FIND(h2span_cluster_tree, &cluster_tree, &dummy_cls);
1190 if (cls)
1191 ++cls->refs;
1192 pthread_mutex_unlock(&cluster_mtx);
1193 return (cls);
1194}
1195
1196void
1197hammer2_cluster_put(h2span_cluster_t *cls)
1198{
1199 pthread_mutex_lock(&cluster_mtx);
1200 assert(cls->refs > 0);
1201 --cls->refs;
1202 if (RB_EMPTY(&cls->tree) && cls->refs == 0) {
1203 RB_REMOVE(h2span_cluster_tree,
1204 &cluster_tree, cls);
1205 hammer2_free(cls);
1206 }
1207 pthread_mutex_unlock(&cluster_mtx);
1208}
1209
1210/*
1211 * Obtain a stable handle to a specific cluster node given its uuid.
1212 * This handle does NOT lock in the route to the node and is typically
1213 * used as part of the hammer2_handle_*() API to obtain a set of
1214 * stable nodes.
29ead430 1215 */
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1216h2span_node_t *
1217hammer2_node_get(h2span_cluster_t *cls, uuid_t *pfs_fsid)
1218{
1219}
1220
1221#endif
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1222
1223#if 0
1224/*
1225 * Acquire a persistent router structure given the cluster and node ids.
1226 * Messages can be transacted via this structure while held. If the route
1227 * is lost messages will return failure.
1228 */
1229hammer2_router_t *
1230hammer2_router_get(uuid_t *pfs_clid, uuid_t *pfs_fsid)
1231{
1232}
1233
1234/*
1235 * Release previously acquired router.
1236 */
1237void
1238hammer2_router_put(hammer2_router_t *router)
1239{
1240}
1241#endif
1242
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1243/************************************************************************
1244 * DEBUGGER *
1245 ************************************************************************/
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1246/*
1247 * Dumps the spanning tree
1248 */
1249void
29ead430 1250shell_tree(hammer2_router_t *router, char *cmdbuf __unused)
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1251{
1252 h2span_cluster_t *cls;
1253 h2span_node_t *node;
1254 h2span_link_t *slink;
1255 char *uustr = NULL;
1256
1257 pthread_mutex_lock(&cluster_mtx);
1258 RB_FOREACH(cls, h2span_cluster_tree, &cluster_tree) {
29ead430 1259 router_printf(router, "Cluster %s\n",
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1260 hammer2_uuid_to_str(&cls->pfs_clid, &uustr));
1261 RB_FOREACH(node, h2span_node_tree, &cls->tree) {
29ead430 1262 router_printf(router, " Node %s (%s)\n",
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1263 hammer2_uuid_to_str(&node->pfs_fsid, &uustr),
1264 node->label);
1265 RB_FOREACH(slink, h2span_link_tree, &node->tree) {
29ead430 1266 router_printf(router, "\tLink dist=%d via %d\n",
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1267 slink->dist,
1268 slink->state->iocom->sock_fd);
1269 }
1270 }
1271 }
1272 pthread_mutex_unlock(&cluster_mtx);
1273 if (uustr)
1274 free(uustr);
1275#if 0
1276 TAILQ_FOREACH(conn, &connq, entry) {
1277 }
1278#endif
1279}