FreeBSD/Linux Kernel Cross Reference
sys/geom/raid/g_raid.c
1 /*-
2 * Copyright (c) 2010 Alexander Motin <mav@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: releng/10.3/sys/geom/raid/g_raid.c 281346 2015-04-10 00:43:24Z mav $");
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/kernel.h>
33 #include <sys/module.h>
34 #include <sys/limits.h>
35 #include <sys/lock.h>
36 #include <sys/mutex.h>
37 #include <sys/bio.h>
38 #include <sys/sbuf.h>
39 #include <sys/sysctl.h>
40 #include <sys/malloc.h>
41 #include <sys/eventhandler.h>
42 #include <vm/uma.h>
43 #include <geom/geom.h>
44 #include <sys/proc.h>
45 #include <sys/kthread.h>
46 #include <sys/sched.h>
47 #include <geom/raid/g_raid.h>
48 #include "g_raid_md_if.h"
49 #include "g_raid_tr_if.h"
50
51 static MALLOC_DEFINE(M_RAID, "raid_data", "GEOM_RAID Data");
52
53 SYSCTL_DECL(_kern_geom);
54 SYSCTL_NODE(_kern_geom, OID_AUTO, raid, CTLFLAG_RW, 0, "GEOM_RAID stuff");
55 int g_raid_enable = 1;
56 TUNABLE_INT("kern.geom.raid.enable", &g_raid_enable);
57 SYSCTL_INT(_kern_geom_raid, OID_AUTO, enable, CTLFLAG_RW,
58 &g_raid_enable, 0, "Enable on-disk metadata taste");
59 u_int g_raid_aggressive_spare = 0;
60 TUNABLE_INT("kern.geom.raid.aggressive_spare", &g_raid_aggressive_spare);
61 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, aggressive_spare, CTLFLAG_RW,
62 &g_raid_aggressive_spare, 0, "Use disks without metadata as spare");
63 u_int g_raid_debug = 0;
64 TUNABLE_INT("kern.geom.raid.debug", &g_raid_debug);
65 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, debug, CTLFLAG_RW, &g_raid_debug, 0,
66 "Debug level");
67 int g_raid_read_err_thresh = 10;
68 TUNABLE_INT("kern.geom.raid.read_err_thresh", &g_raid_read_err_thresh);
69 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, read_err_thresh, CTLFLAG_RW,
70 &g_raid_read_err_thresh, 0,
71 "Number of read errors equated to disk failure");
72 u_int g_raid_start_timeout = 30;
73 TUNABLE_INT("kern.geom.raid.start_timeout", &g_raid_start_timeout);
74 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, start_timeout, CTLFLAG_RW,
75 &g_raid_start_timeout, 0,
76 "Time to wait for all array components");
77 static u_int g_raid_clean_time = 5;
78 TUNABLE_INT("kern.geom.raid.clean_time", &g_raid_clean_time);
79 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, clean_time, CTLFLAG_RW,
80 &g_raid_clean_time, 0, "Mark volume as clean when idling");
81 static u_int g_raid_disconnect_on_failure = 1;
82 TUNABLE_INT("kern.geom.raid.disconnect_on_failure",
83 &g_raid_disconnect_on_failure);
84 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, disconnect_on_failure, CTLFLAG_RW,
85 &g_raid_disconnect_on_failure, 0, "Disconnect component on I/O failure.");
86 static u_int g_raid_name_format = 0;
87 TUNABLE_INT("kern.geom.raid.name_format", &g_raid_name_format);
88 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, name_format, CTLFLAG_RW,
89 &g_raid_name_format, 0, "Providers name format.");
90 static u_int g_raid_idle_threshold = 1000000;
91 TUNABLE_INT("kern.geom.raid.idle_threshold", &g_raid_idle_threshold);
92 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, idle_threshold, CTLFLAG_RW,
93 &g_raid_idle_threshold, 1000000,
94 "Time in microseconds to consider a volume idle.");
95 static u_int ar_legacy_aliases = 1;
96 SYSCTL_INT(_kern_geom_raid, OID_AUTO, legacy_aliases, CTLFLAG_RW,
97 &ar_legacy_aliases, 0, "Create aliases named as the legacy ataraid style.");
98 TUNABLE_INT("kern.geom_raid.legacy_aliases", &ar_legacy_aliases);
99
100
101 #define MSLEEP(rv, ident, mtx, priority, wmesg, timeout) do { \
102 G_RAID_DEBUG(4, "%s: Sleeping %p.", __func__, (ident)); \
103 rv = msleep((ident), (mtx), (priority), (wmesg), (timeout)); \
104 G_RAID_DEBUG(4, "%s: Woken up %p.", __func__, (ident)); \
105 } while (0)
106
107 LIST_HEAD(, g_raid_md_class) g_raid_md_classes =
108 LIST_HEAD_INITIALIZER(g_raid_md_classes);
109
110 LIST_HEAD(, g_raid_tr_class) g_raid_tr_classes =
111 LIST_HEAD_INITIALIZER(g_raid_tr_classes);
112
113 LIST_HEAD(, g_raid_volume) g_raid_volumes =
114 LIST_HEAD_INITIALIZER(g_raid_volumes);
115
116 static eventhandler_tag g_raid_post_sync = NULL;
117 static int g_raid_started = 0;
118 static int g_raid_shutdown = 0;
119
120 static int g_raid_destroy_geom(struct gctl_req *req, struct g_class *mp,
121 struct g_geom *gp);
122 static g_taste_t g_raid_taste;
123 static void g_raid_init(struct g_class *mp);
124 static void g_raid_fini(struct g_class *mp);
125
126 struct g_class g_raid_class = {
127 .name = G_RAID_CLASS_NAME,
128 .version = G_VERSION,
129 .ctlreq = g_raid_ctl,
130 .taste = g_raid_taste,
131 .destroy_geom = g_raid_destroy_geom,
132 .init = g_raid_init,
133 .fini = g_raid_fini
134 };
135
136 static void g_raid_destroy_provider(struct g_raid_volume *vol);
137 static int g_raid_update_disk(struct g_raid_disk *disk, u_int event);
138 static int g_raid_update_subdisk(struct g_raid_subdisk *subdisk, u_int event);
139 static int g_raid_update_volume(struct g_raid_volume *vol, u_int event);
140 static int g_raid_update_node(struct g_raid_softc *sc, u_int event);
141 static void g_raid_dumpconf(struct sbuf *sb, const char *indent,
142 struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp);
143 static void g_raid_start(struct bio *bp);
144 static void g_raid_start_request(struct bio *bp);
145 static void g_raid_disk_done(struct bio *bp);
146 static void g_raid_poll(struct g_raid_softc *sc);
147
148 static const char *
149 g_raid_node_event2str(int event)
150 {
151
152 switch (event) {
153 case G_RAID_NODE_E_WAKE:
154 return ("WAKE");
155 case G_RAID_NODE_E_START:
156 return ("START");
157 default:
158 return ("INVALID");
159 }
160 }
161
162 const char *
163 g_raid_disk_state2str(int state)
164 {
165
166 switch (state) {
167 case G_RAID_DISK_S_NONE:
168 return ("NONE");
169 case G_RAID_DISK_S_OFFLINE:
170 return ("OFFLINE");
171 case G_RAID_DISK_S_DISABLED:
172 return ("DISABLED");
173 case G_RAID_DISK_S_FAILED:
174 return ("FAILED");
175 case G_RAID_DISK_S_STALE_FAILED:
176 return ("STALE_FAILED");
177 case G_RAID_DISK_S_SPARE:
178 return ("SPARE");
179 case G_RAID_DISK_S_STALE:
180 return ("STALE");
181 case G_RAID_DISK_S_ACTIVE:
182 return ("ACTIVE");
183 default:
184 return ("INVALID");
185 }
186 }
187
188 static const char *
189 g_raid_disk_event2str(int event)
190 {
191
192 switch (event) {
193 case G_RAID_DISK_E_DISCONNECTED:
194 return ("DISCONNECTED");
195 default:
196 return ("INVALID");
197 }
198 }
199
200 const char *
201 g_raid_subdisk_state2str(int state)
202 {
203
204 switch (state) {
205 case G_RAID_SUBDISK_S_NONE:
206 return ("NONE");
207 case G_RAID_SUBDISK_S_FAILED:
208 return ("FAILED");
209 case G_RAID_SUBDISK_S_NEW:
210 return ("NEW");
211 case G_RAID_SUBDISK_S_REBUILD:
212 return ("REBUILD");
213 case G_RAID_SUBDISK_S_UNINITIALIZED:
214 return ("UNINITIALIZED");
215 case G_RAID_SUBDISK_S_STALE:
216 return ("STALE");
217 case G_RAID_SUBDISK_S_RESYNC:
218 return ("RESYNC");
219 case G_RAID_SUBDISK_S_ACTIVE:
220 return ("ACTIVE");
221 default:
222 return ("INVALID");
223 }
224 }
225
226 static const char *
227 g_raid_subdisk_event2str(int event)
228 {
229
230 switch (event) {
231 case G_RAID_SUBDISK_E_NEW:
232 return ("NEW");
233 case G_RAID_SUBDISK_E_FAILED:
234 return ("FAILED");
235 case G_RAID_SUBDISK_E_DISCONNECTED:
236 return ("DISCONNECTED");
237 default:
238 return ("INVALID");
239 }
240 }
241
242 const char *
243 g_raid_volume_state2str(int state)
244 {
245
246 switch (state) {
247 case G_RAID_VOLUME_S_STARTING:
248 return ("STARTING");
249 case G_RAID_VOLUME_S_BROKEN:
250 return ("BROKEN");
251 case G_RAID_VOLUME_S_DEGRADED:
252 return ("DEGRADED");
253 case G_RAID_VOLUME_S_SUBOPTIMAL:
254 return ("SUBOPTIMAL");
255 case G_RAID_VOLUME_S_OPTIMAL:
256 return ("OPTIMAL");
257 case G_RAID_VOLUME_S_UNSUPPORTED:
258 return ("UNSUPPORTED");
259 case G_RAID_VOLUME_S_STOPPED:
260 return ("STOPPED");
261 default:
262 return ("INVALID");
263 }
264 }
265
266 static const char *
267 g_raid_volume_event2str(int event)
268 {
269
270 switch (event) {
271 case G_RAID_VOLUME_E_UP:
272 return ("UP");
273 case G_RAID_VOLUME_E_DOWN:
274 return ("DOWN");
275 case G_RAID_VOLUME_E_START:
276 return ("START");
277 case G_RAID_VOLUME_E_STARTMD:
278 return ("STARTMD");
279 default:
280 return ("INVALID");
281 }
282 }
283
284 const char *
285 g_raid_volume_level2str(int level, int qual)
286 {
287
288 switch (level) {
289 case G_RAID_VOLUME_RL_RAID0:
290 return ("RAID0");
291 case G_RAID_VOLUME_RL_RAID1:
292 return ("RAID1");
293 case G_RAID_VOLUME_RL_RAID3:
294 if (qual == G_RAID_VOLUME_RLQ_R3P0)
295 return ("RAID3-P0");
296 if (qual == G_RAID_VOLUME_RLQ_R3PN)
297 return ("RAID3-PN");
298 return ("RAID3");
299 case G_RAID_VOLUME_RL_RAID4:
300 if (qual == G_RAID_VOLUME_RLQ_R4P0)
301 return ("RAID4-P0");
302 if (qual == G_RAID_VOLUME_RLQ_R4PN)
303 return ("RAID4-PN");
304 return ("RAID4");
305 case G_RAID_VOLUME_RL_RAID5:
306 if (qual == G_RAID_VOLUME_RLQ_R5RA)
307 return ("RAID5-RA");
308 if (qual == G_RAID_VOLUME_RLQ_R5RS)
309 return ("RAID5-RS");
310 if (qual == G_RAID_VOLUME_RLQ_R5LA)
311 return ("RAID5-LA");
312 if (qual == G_RAID_VOLUME_RLQ_R5LS)
313 return ("RAID5-LS");
314 return ("RAID5");
315 case G_RAID_VOLUME_RL_RAID6:
316 if (qual == G_RAID_VOLUME_RLQ_R6RA)
317 return ("RAID6-RA");
318 if (qual == G_RAID_VOLUME_RLQ_R6RS)
319 return ("RAID6-RS");
320 if (qual == G_RAID_VOLUME_RLQ_R6LA)
321 return ("RAID6-LA");
322 if (qual == G_RAID_VOLUME_RLQ_R6LS)
323 return ("RAID6-LS");
324 return ("RAID6");
325 case G_RAID_VOLUME_RL_RAIDMDF:
326 if (qual == G_RAID_VOLUME_RLQ_RMDFRA)
327 return ("RAIDMDF-RA");
328 if (qual == G_RAID_VOLUME_RLQ_RMDFRS)
329 return ("RAIDMDF-RS");
330 if (qual == G_RAID_VOLUME_RLQ_RMDFLA)
331 return ("RAIDMDF-LA");
332 if (qual == G_RAID_VOLUME_RLQ_RMDFLS)
333 return ("RAIDMDF-LS");
334 return ("RAIDMDF");
335 case G_RAID_VOLUME_RL_RAID1E:
336 if (qual == G_RAID_VOLUME_RLQ_R1EA)
337 return ("RAID1E-A");
338 if (qual == G_RAID_VOLUME_RLQ_R1EO)
339 return ("RAID1E-O");
340 return ("RAID1E");
341 case G_RAID_VOLUME_RL_SINGLE:
342 return ("SINGLE");
343 case G_RAID_VOLUME_RL_CONCAT:
344 return ("CONCAT");
345 case G_RAID_VOLUME_RL_RAID5E:
346 if (qual == G_RAID_VOLUME_RLQ_R5ERA)
347 return ("RAID5E-RA");
348 if (qual == G_RAID_VOLUME_RLQ_R5ERS)
349 return ("RAID5E-RS");
350 if (qual == G_RAID_VOLUME_RLQ_R5ELA)
351 return ("RAID5E-LA");
352 if (qual == G_RAID_VOLUME_RLQ_R5ELS)
353 return ("RAID5E-LS");
354 return ("RAID5E");
355 case G_RAID_VOLUME_RL_RAID5EE:
356 if (qual == G_RAID_VOLUME_RLQ_R5EERA)
357 return ("RAID5EE-RA");
358 if (qual == G_RAID_VOLUME_RLQ_R5EERS)
359 return ("RAID5EE-RS");
360 if (qual == G_RAID_VOLUME_RLQ_R5EELA)
361 return ("RAID5EE-LA");
362 if (qual == G_RAID_VOLUME_RLQ_R5EELS)
363 return ("RAID5EE-LS");
364 return ("RAID5EE");
365 case G_RAID_VOLUME_RL_RAID5R:
366 if (qual == G_RAID_VOLUME_RLQ_R5RRA)
367 return ("RAID5R-RA");
368 if (qual == G_RAID_VOLUME_RLQ_R5RRS)
369 return ("RAID5R-RS");
370 if (qual == G_RAID_VOLUME_RLQ_R5RLA)
371 return ("RAID5R-LA");
372 if (qual == G_RAID_VOLUME_RLQ_R5RLS)
373 return ("RAID5R-LS");
374 return ("RAID5E");
375 default:
376 return ("UNKNOWN");
377 }
378 }
379
380 int
381 g_raid_volume_str2level(const char *str, int *level, int *qual)
382 {
383
384 *level = G_RAID_VOLUME_RL_UNKNOWN;
385 *qual = G_RAID_VOLUME_RLQ_NONE;
386 if (strcasecmp(str, "RAID0") == 0)
387 *level = G_RAID_VOLUME_RL_RAID0;
388 else if (strcasecmp(str, "RAID1") == 0)
389 *level = G_RAID_VOLUME_RL_RAID1;
390 else if (strcasecmp(str, "RAID3-P0") == 0) {
391 *level = G_RAID_VOLUME_RL_RAID3;
392 *qual = G_RAID_VOLUME_RLQ_R3P0;
393 } else if (strcasecmp(str, "RAID3-PN") == 0 ||
394 strcasecmp(str, "RAID3") == 0) {
395 *level = G_RAID_VOLUME_RL_RAID3;
396 *qual = G_RAID_VOLUME_RLQ_R3PN;
397 } else if (strcasecmp(str, "RAID4-P0") == 0) {
398 *level = G_RAID_VOLUME_RL_RAID4;
399 *qual = G_RAID_VOLUME_RLQ_R4P0;
400 } else if (strcasecmp(str, "RAID4-PN") == 0 ||
401 strcasecmp(str, "RAID4") == 0) {
402 *level = G_RAID_VOLUME_RL_RAID4;
403 *qual = G_RAID_VOLUME_RLQ_R4PN;
404 } else if (strcasecmp(str, "RAID5-RA") == 0) {
405 *level = G_RAID_VOLUME_RL_RAID5;
406 *qual = G_RAID_VOLUME_RLQ_R5RA;
407 } else if (strcasecmp(str, "RAID5-RS") == 0) {
408 *level = G_RAID_VOLUME_RL_RAID5;
409 *qual = G_RAID_VOLUME_RLQ_R5RS;
410 } else if (strcasecmp(str, "RAID5") == 0 ||
411 strcasecmp(str, "RAID5-LA") == 0) {
412 *level = G_RAID_VOLUME_RL_RAID5;
413 *qual = G_RAID_VOLUME_RLQ_R5LA;
414 } else if (strcasecmp(str, "RAID5-LS") == 0) {
415 *level = G_RAID_VOLUME_RL_RAID5;
416 *qual = G_RAID_VOLUME_RLQ_R5LS;
417 } else if (strcasecmp(str, "RAID6-RA") == 0) {
418 *level = G_RAID_VOLUME_RL_RAID6;
419 *qual = G_RAID_VOLUME_RLQ_R6RA;
420 } else if (strcasecmp(str, "RAID6-RS") == 0) {
421 *level = G_RAID_VOLUME_RL_RAID6;
422 *qual = G_RAID_VOLUME_RLQ_R6RS;
423 } else if (strcasecmp(str, "RAID6") == 0 ||
424 strcasecmp(str, "RAID6-LA") == 0) {
425 *level = G_RAID_VOLUME_RL_RAID6;
426 *qual = G_RAID_VOLUME_RLQ_R6LA;
427 } else if (strcasecmp(str, "RAID6-LS") == 0) {
428 *level = G_RAID_VOLUME_RL_RAID6;
429 *qual = G_RAID_VOLUME_RLQ_R6LS;
430 } else if (strcasecmp(str, "RAIDMDF-RA") == 0) {
431 *level = G_RAID_VOLUME_RL_RAIDMDF;
432 *qual = G_RAID_VOLUME_RLQ_RMDFRA;
433 } else if (strcasecmp(str, "RAIDMDF-RS") == 0) {
434 *level = G_RAID_VOLUME_RL_RAIDMDF;
435 *qual = G_RAID_VOLUME_RLQ_RMDFRS;
436 } else if (strcasecmp(str, "RAIDMDF") == 0 ||
437 strcasecmp(str, "RAIDMDF-LA") == 0) {
438 *level = G_RAID_VOLUME_RL_RAIDMDF;
439 *qual = G_RAID_VOLUME_RLQ_RMDFLA;
440 } else if (strcasecmp(str, "RAIDMDF-LS") == 0) {
441 *level = G_RAID_VOLUME_RL_RAIDMDF;
442 *qual = G_RAID_VOLUME_RLQ_RMDFLS;
443 } else if (strcasecmp(str, "RAID10") == 0 ||
444 strcasecmp(str, "RAID1E") == 0 ||
445 strcasecmp(str, "RAID1E-A") == 0) {
446 *level = G_RAID_VOLUME_RL_RAID1E;
447 *qual = G_RAID_VOLUME_RLQ_R1EA;
448 } else if (strcasecmp(str, "RAID1E-O") == 0) {
449 *level = G_RAID_VOLUME_RL_RAID1E;
450 *qual = G_RAID_VOLUME_RLQ_R1EO;
451 } else if (strcasecmp(str, "SINGLE") == 0)
452 *level = G_RAID_VOLUME_RL_SINGLE;
453 else if (strcasecmp(str, "CONCAT") == 0)
454 *level = G_RAID_VOLUME_RL_CONCAT;
455 else if (strcasecmp(str, "RAID5E-RA") == 0) {
456 *level = G_RAID_VOLUME_RL_RAID5E;
457 *qual = G_RAID_VOLUME_RLQ_R5ERA;
458 } else if (strcasecmp(str, "RAID5E-RS") == 0) {
459 *level = G_RAID_VOLUME_RL_RAID5E;
460 *qual = G_RAID_VOLUME_RLQ_R5ERS;
461 } else if (strcasecmp(str, "RAID5E") == 0 ||
462 strcasecmp(str, "RAID5E-LA") == 0) {
463 *level = G_RAID_VOLUME_RL_RAID5E;
464 *qual = G_RAID_VOLUME_RLQ_R5ELA;
465 } else if (strcasecmp(str, "RAID5E-LS") == 0) {
466 *level = G_RAID_VOLUME_RL_RAID5E;
467 *qual = G_RAID_VOLUME_RLQ_R5ELS;
468 } else if (strcasecmp(str, "RAID5EE-RA") == 0) {
469 *level = G_RAID_VOLUME_RL_RAID5EE;
470 *qual = G_RAID_VOLUME_RLQ_R5EERA;
471 } else if (strcasecmp(str, "RAID5EE-RS") == 0) {
472 *level = G_RAID_VOLUME_RL_RAID5EE;
473 *qual = G_RAID_VOLUME_RLQ_R5EERS;
474 } else if (strcasecmp(str, "RAID5EE") == 0 ||
475 strcasecmp(str, "RAID5EE-LA") == 0) {
476 *level = G_RAID_VOLUME_RL_RAID5EE;
477 *qual = G_RAID_VOLUME_RLQ_R5EELA;
478 } else if (strcasecmp(str, "RAID5EE-LS") == 0) {
479 *level = G_RAID_VOLUME_RL_RAID5EE;
480 *qual = G_RAID_VOLUME_RLQ_R5EELS;
481 } else if (strcasecmp(str, "RAID5R-RA") == 0) {
482 *level = G_RAID_VOLUME_RL_RAID5R;
483 *qual = G_RAID_VOLUME_RLQ_R5RRA;
484 } else if (strcasecmp(str, "RAID5R-RS") == 0) {
485 *level = G_RAID_VOLUME_RL_RAID5R;
486 *qual = G_RAID_VOLUME_RLQ_R5RRS;
487 } else if (strcasecmp(str, "RAID5R") == 0 ||
488 strcasecmp(str, "RAID5R-LA") == 0) {
489 *level = G_RAID_VOLUME_RL_RAID5R;
490 *qual = G_RAID_VOLUME_RLQ_R5RLA;
491 } else if (strcasecmp(str, "RAID5R-LS") == 0) {
492 *level = G_RAID_VOLUME_RL_RAID5R;
493 *qual = G_RAID_VOLUME_RLQ_R5RLS;
494 } else
495 return (-1);
496 return (0);
497 }
498
499 const char *
500 g_raid_get_diskname(struct g_raid_disk *disk)
501 {
502
503 if (disk->d_consumer == NULL || disk->d_consumer->provider == NULL)
504 return ("[unknown]");
505 return (disk->d_consumer->provider->name);
506 }
507
508 void
509 g_raid_get_disk_info(struct g_raid_disk *disk)
510 {
511 struct g_consumer *cp = disk->d_consumer;
512 int error, len;
513
514 /* Read kernel dumping information. */
515 disk->d_kd.offset = 0;
516 disk->d_kd.length = OFF_MAX;
517 len = sizeof(disk->d_kd);
518 error = g_io_getattr("GEOM::kerneldump", cp, &len, &disk->d_kd);
519 if (error)
520 disk->d_kd.di.dumper = NULL;
521 if (disk->d_kd.di.dumper == NULL)
522 G_RAID_DEBUG1(2, disk->d_softc,
523 "Dumping not supported by %s: %d.",
524 cp->provider->name, error);
525
526 /* Read BIO_DELETE support. */
527 error = g_getattr("GEOM::candelete", cp, &disk->d_candelete);
528 if (error)
529 disk->d_candelete = 0;
530 if (!disk->d_candelete)
531 G_RAID_DEBUG1(2, disk->d_softc,
532 "BIO_DELETE not supported by %s: %d.",
533 cp->provider->name, error);
534 }
535
536 void
537 g_raid_report_disk_state(struct g_raid_disk *disk)
538 {
539 struct g_raid_subdisk *sd;
540 int len, state;
541 uint32_t s;
542
543 if (disk->d_consumer == NULL)
544 return;
545 if (disk->d_state == G_RAID_DISK_S_DISABLED) {
546 s = G_STATE_ACTIVE; /* XXX */
547 } else if (disk->d_state == G_RAID_DISK_S_FAILED ||
548 disk->d_state == G_RAID_DISK_S_STALE_FAILED) {
549 s = G_STATE_FAILED;
550 } else {
551 state = G_RAID_SUBDISK_S_ACTIVE;
552 TAILQ_FOREACH(sd, &disk->d_subdisks, sd_next) {
553 if (sd->sd_state < state)
554 state = sd->sd_state;
555 }
556 if (state == G_RAID_SUBDISK_S_FAILED)
557 s = G_STATE_FAILED;
558 else if (state == G_RAID_SUBDISK_S_NEW ||
559 state == G_RAID_SUBDISK_S_REBUILD)
560 s = G_STATE_REBUILD;
561 else if (state == G_RAID_SUBDISK_S_STALE ||
562 state == G_RAID_SUBDISK_S_RESYNC)
563 s = G_STATE_RESYNC;
564 else
565 s = G_STATE_ACTIVE;
566 }
567 len = sizeof(s);
568 g_io_getattr("GEOM::setstate", disk->d_consumer, &len, &s);
569 G_RAID_DEBUG1(2, disk->d_softc, "Disk %s state reported as %d.",
570 g_raid_get_diskname(disk), s);
571 }
572
573 void
574 g_raid_change_disk_state(struct g_raid_disk *disk, int state)
575 {
576
577 G_RAID_DEBUG1(0, disk->d_softc, "Disk %s state changed from %s to %s.",
578 g_raid_get_diskname(disk),
579 g_raid_disk_state2str(disk->d_state),
580 g_raid_disk_state2str(state));
581 disk->d_state = state;
582 g_raid_report_disk_state(disk);
583 }
584
585 void
586 g_raid_change_subdisk_state(struct g_raid_subdisk *sd, int state)
587 {
588
589 G_RAID_DEBUG1(0, sd->sd_softc,
590 "Subdisk %s:%d-%s state changed from %s to %s.",
591 sd->sd_volume->v_name, sd->sd_pos,
592 sd->sd_disk ? g_raid_get_diskname(sd->sd_disk) : "[none]",
593 g_raid_subdisk_state2str(sd->sd_state),
594 g_raid_subdisk_state2str(state));
595 sd->sd_state = state;
596 if (sd->sd_disk)
597 g_raid_report_disk_state(sd->sd_disk);
598 }
599
600 void
601 g_raid_change_volume_state(struct g_raid_volume *vol, int state)
602 {
603
604 G_RAID_DEBUG1(0, vol->v_softc,
605 "Volume %s state changed from %s to %s.",
606 vol->v_name,
607 g_raid_volume_state2str(vol->v_state),
608 g_raid_volume_state2str(state));
609 vol->v_state = state;
610 }
611
612 /*
613 * --- Events handling functions ---
614 * Events in geom_raid are used to maintain subdisks and volumes status
615 * from one thread to simplify locking.
616 */
617 static void
618 g_raid_event_free(struct g_raid_event *ep)
619 {
620
621 free(ep, M_RAID);
622 }
623
624 int
625 g_raid_event_send(void *arg, int event, int flags)
626 {
627 struct g_raid_softc *sc;
628 struct g_raid_event *ep;
629 int error;
630
631 if ((flags & G_RAID_EVENT_VOLUME) != 0) {
632 sc = ((struct g_raid_volume *)arg)->v_softc;
633 } else if ((flags & G_RAID_EVENT_DISK) != 0) {
634 sc = ((struct g_raid_disk *)arg)->d_softc;
635 } else if ((flags & G_RAID_EVENT_SUBDISK) != 0) {
636 sc = ((struct g_raid_subdisk *)arg)->sd_softc;
637 } else {
638 sc = arg;
639 }
640 ep = malloc(sizeof(*ep), M_RAID,
641 sx_xlocked(&sc->sc_lock) ? M_WAITOK : M_NOWAIT);
642 if (ep == NULL)
643 return (ENOMEM);
644 ep->e_tgt = arg;
645 ep->e_event = event;
646 ep->e_flags = flags;
647 ep->e_error = 0;
648 G_RAID_DEBUG1(4, sc, "Sending event %p. Waking up %p.", ep, sc);
649 mtx_lock(&sc->sc_queue_mtx);
650 TAILQ_INSERT_TAIL(&sc->sc_events, ep, e_next);
651 mtx_unlock(&sc->sc_queue_mtx);
652 wakeup(sc);
653
654 if ((flags & G_RAID_EVENT_WAIT) == 0)
655 return (0);
656
657 sx_assert(&sc->sc_lock, SX_XLOCKED);
658 G_RAID_DEBUG1(4, sc, "Sleeping on %p.", ep);
659 sx_xunlock(&sc->sc_lock);
660 while ((ep->e_flags & G_RAID_EVENT_DONE) == 0) {
661 mtx_lock(&sc->sc_queue_mtx);
662 MSLEEP(error, ep, &sc->sc_queue_mtx, PRIBIO | PDROP, "m:event",
663 hz * 5);
664 }
665 error = ep->e_error;
666 g_raid_event_free(ep);
667 sx_xlock(&sc->sc_lock);
668 return (error);
669 }
670
671 static void
672 g_raid_event_cancel(struct g_raid_softc *sc, void *tgt)
673 {
674 struct g_raid_event *ep, *tmpep;
675
676 sx_assert(&sc->sc_lock, SX_XLOCKED);
677
678 mtx_lock(&sc->sc_queue_mtx);
679 TAILQ_FOREACH_SAFE(ep, &sc->sc_events, e_next, tmpep) {
680 if (ep->e_tgt != tgt)
681 continue;
682 TAILQ_REMOVE(&sc->sc_events, ep, e_next);
683 if ((ep->e_flags & G_RAID_EVENT_WAIT) == 0)
684 g_raid_event_free(ep);
685 else {
686 ep->e_error = ECANCELED;
687 wakeup(ep);
688 }
689 }
690 mtx_unlock(&sc->sc_queue_mtx);
691 }
692
693 static int
694 g_raid_event_check(struct g_raid_softc *sc, void *tgt)
695 {
696 struct g_raid_event *ep;
697 int res = 0;
698
699 sx_assert(&sc->sc_lock, SX_XLOCKED);
700
701 mtx_lock(&sc->sc_queue_mtx);
702 TAILQ_FOREACH(ep, &sc->sc_events, e_next) {
703 if (ep->e_tgt != tgt)
704 continue;
705 res = 1;
706 break;
707 }
708 mtx_unlock(&sc->sc_queue_mtx);
709 return (res);
710 }
711
712 /*
713 * Return the number of disks in given state.
714 * If state is equal to -1, count all connected disks.
715 */
716 u_int
717 g_raid_ndisks(struct g_raid_softc *sc, int state)
718 {
719 struct g_raid_disk *disk;
720 u_int n;
721
722 sx_assert(&sc->sc_lock, SX_LOCKED);
723
724 n = 0;
725 TAILQ_FOREACH(disk, &sc->sc_disks, d_next) {
726 if (disk->d_state == state || state == -1)
727 n++;
728 }
729 return (n);
730 }
731
732 /*
733 * Return the number of subdisks in given state.
734 * If state is equal to -1, count all connected disks.
735 */
736 u_int
737 g_raid_nsubdisks(struct g_raid_volume *vol, int state)
738 {
739 struct g_raid_subdisk *subdisk;
740 struct g_raid_softc *sc;
741 u_int i, n ;
742
743 sc = vol->v_softc;
744 sx_assert(&sc->sc_lock, SX_LOCKED);
745
746 n = 0;
747 for (i = 0; i < vol->v_disks_count; i++) {
748 subdisk = &vol->v_subdisks[i];
749 if ((state == -1 &&
750 subdisk->sd_state != G_RAID_SUBDISK_S_NONE) ||
751 subdisk->sd_state == state)
752 n++;
753 }
754 return (n);
755 }
756
757 /*
758 * Return the first subdisk in given state.
759 * If state is equal to -1, then the first connected disks.
760 */
761 struct g_raid_subdisk *
762 g_raid_get_subdisk(struct g_raid_volume *vol, int state)
763 {
764 struct g_raid_subdisk *sd;
765 struct g_raid_softc *sc;
766 u_int i;
767
768 sc = vol->v_softc;
769 sx_assert(&sc->sc_lock, SX_LOCKED);
770
771 for (i = 0; i < vol->v_disks_count; i++) {
772 sd = &vol->v_subdisks[i];
773 if ((state == -1 &&
774 sd->sd_state != G_RAID_SUBDISK_S_NONE) ||
775 sd->sd_state == state)
776 return (sd);
777 }
778 return (NULL);
779 }
780
781 struct g_consumer *
782 g_raid_open_consumer(struct g_raid_softc *sc, const char *name)
783 {
784 struct g_consumer *cp;
785 struct g_provider *pp;
786
787 g_topology_assert();
788
789 if (strncmp(name, "/dev/", 5) == 0)
790 name += 5;
791 pp = g_provider_by_name(name);
792 if (pp == NULL)
793 return (NULL);
794 cp = g_new_consumer(sc->sc_geom);
795 cp->flags |= G_CF_DIRECT_RECEIVE;
796 if (g_attach(cp, pp) != 0) {
797 g_destroy_consumer(cp);
798 return (NULL);
799 }
800 if (g_access(cp, 1, 1, 1) != 0) {
801 g_detach(cp);
802 g_destroy_consumer(cp);
803 return (NULL);
804 }
805 return (cp);
806 }
807
808 static u_int
809 g_raid_nrequests(struct g_raid_softc *sc, struct g_consumer *cp)
810 {
811 struct bio *bp;
812 u_int nreqs = 0;
813
814 mtx_lock(&sc->sc_queue_mtx);
815 TAILQ_FOREACH(bp, &sc->sc_queue.queue, bio_queue) {
816 if (bp->bio_from == cp)
817 nreqs++;
818 }
819 mtx_unlock(&sc->sc_queue_mtx);
820 return (nreqs);
821 }
822
823 u_int
824 g_raid_nopens(struct g_raid_softc *sc)
825 {
826 struct g_raid_volume *vol;
827 u_int opens;
828
829 opens = 0;
830 TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) {
831 if (vol->v_provider_open != 0)
832 opens++;
833 }
834 return (opens);
835 }
836
837 static int
838 g_raid_consumer_is_busy(struct g_raid_softc *sc, struct g_consumer *cp)
839 {
840
841 if (cp->index > 0) {
842 G_RAID_DEBUG1(2, sc,
843 "I/O requests for %s exist, can't destroy it now.",
844 cp->provider->name);
845 return (1);
846 }
847 if (g_raid_nrequests(sc, cp) > 0) {
848 G_RAID_DEBUG1(2, sc,
849 "I/O requests for %s in queue, can't destroy it now.",
850 cp->provider->name);
851 return (1);
852 }
853 return (0);
854 }
855
856 static void
857 g_raid_destroy_consumer(void *arg, int flags __unused)
858 {
859 struct g_consumer *cp;
860
861 g_topology_assert();
862
863 cp = arg;
864 G_RAID_DEBUG(1, "Consumer %s destroyed.", cp->provider->name);
865 g_detach(cp);
866 g_destroy_consumer(cp);
867 }
868
869 void
870 g_raid_kill_consumer(struct g_raid_softc *sc, struct g_consumer *cp)
871 {
872 struct g_provider *pp;
873 int retaste_wait;
874
875 g_topology_assert_not();
876
877 g_topology_lock();
878 cp->private = NULL;
879 if (g_raid_consumer_is_busy(sc, cp))
880 goto out;
881 pp = cp->provider;
882 retaste_wait = 0;
883 if (cp->acw == 1) {
884 if ((pp->geom->flags & G_GEOM_WITHER) == 0)
885 retaste_wait = 1;
886 }
887 if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0)
888 g_access(cp, -cp->acr, -cp->acw, -cp->ace);
889 if (retaste_wait) {
890 /*
891 * After retaste event was send (inside g_access()), we can send
892 * event to detach and destroy consumer.
893 * A class, which has consumer to the given provider connected
894 * will not receive retaste event for the provider.
895 * This is the way how I ignore retaste events when I close
896 * consumers opened for write: I detach and destroy consumer
897 * after retaste event is sent.
898 */
899 g_post_event(g_raid_destroy_consumer, cp, M_WAITOK, NULL);
900 goto out;
901 }
902 G_RAID_DEBUG(1, "Consumer %s destroyed.", pp->name);
903 g_detach(cp);
904 g_destroy_consumer(cp);
905 out:
906 g_topology_unlock();
907 }
908
909 static void
910 g_raid_orphan(struct g_consumer *cp)
911 {
912 struct g_raid_disk *disk;
913
914 g_topology_assert();
915
916 disk = cp->private;
917 if (disk == NULL)
918 return;
919 g_raid_event_send(disk, G_RAID_DISK_E_DISCONNECTED,
920 G_RAID_EVENT_DISK);
921 }
922
923 static void
924 g_raid_clean(struct g_raid_volume *vol, int acw)
925 {
926 struct g_raid_softc *sc;
927 int timeout;
928
929 sc = vol->v_softc;
930 g_topology_assert_not();
931 sx_assert(&sc->sc_lock, SX_XLOCKED);
932
933 // if ((sc->sc_flags & G_RAID_DEVICE_FLAG_NOFAILSYNC) != 0)
934 // return;
935 if (!vol->v_dirty)
936 return;
937 if (vol->v_writes > 0)
938 return;
939 if (acw > 0 || (acw == -1 &&
940 vol->v_provider != NULL && vol->v_provider->acw > 0)) {
941 timeout = g_raid_clean_time - (time_uptime - vol->v_last_write);
942 if (!g_raid_shutdown && timeout > 0)
943 return;
944 }
945 vol->v_dirty = 0;
946 G_RAID_DEBUG1(1, sc, "Volume %s marked as clean.",
947 vol->v_name);
948 g_raid_write_metadata(sc, vol, NULL, NULL);
949 }
950
951 static void
952 g_raid_dirty(struct g_raid_volume *vol)
953 {
954 struct g_raid_softc *sc;
955
956 sc = vol->v_softc;
957 g_topology_assert_not();
958 sx_assert(&sc->sc_lock, SX_XLOCKED);
959
960 // if ((sc->sc_flags & G_RAID_DEVICE_FLAG_NOFAILSYNC) != 0)
961 // return;
962 vol->v_dirty = 1;
963 G_RAID_DEBUG1(1, sc, "Volume %s marked as dirty.",
964 vol->v_name);
965 g_raid_write_metadata(sc, vol, NULL, NULL);
966 }
967
968 void
969 g_raid_tr_flush_common(struct g_raid_tr_object *tr, struct bio *bp)
970 {
971 struct g_raid_softc *sc;
972 struct g_raid_volume *vol;
973 struct g_raid_subdisk *sd;
974 struct bio_queue_head queue;
975 struct bio *cbp;
976 int i;
977
978 vol = tr->tro_volume;
979 sc = vol->v_softc;
980
981 /*
982 * Allocate all bios before sending any request, so we can return
983 * ENOMEM in nice and clean way.
984 */
985 bioq_init(&queue);
986 for (i = 0; i < vol->v_disks_count; i++) {
987 sd = &vol->v_subdisks[i];
988 if (sd->sd_state == G_RAID_SUBDISK_S_NONE ||
989 sd->sd_state == G_RAID_SUBDISK_S_FAILED)
990 continue;
991 cbp = g_clone_bio(bp);
992 if (cbp == NULL)
993 goto failure;
994 cbp->bio_caller1 = sd;
995 bioq_insert_tail(&queue, cbp);
996 }
997 while ((cbp = bioq_takefirst(&queue)) != NULL) {
998 sd = cbp->bio_caller1;
999 cbp->bio_caller1 = NULL;
1000 g_raid_subdisk_iostart(sd, cbp);
1001 }
1002 return;
1003 failure:
1004 while ((cbp = bioq_takefirst(&queue)) != NULL)
1005 g_destroy_bio(cbp);
1006 if (bp->bio_error == 0)
1007 bp->bio_error = ENOMEM;
1008 g_raid_iodone(bp, bp->bio_error);
1009 }
1010
1011 static void
1012 g_raid_tr_kerneldump_common_done(struct bio *bp)
1013 {
1014
1015 bp->bio_flags |= BIO_DONE;
1016 }
1017
1018 int
1019 g_raid_tr_kerneldump_common(struct g_raid_tr_object *tr,
1020 void *virtual, vm_offset_t physical, off_t offset, size_t length)
1021 {
1022 struct g_raid_softc *sc;
1023 struct g_raid_volume *vol;
1024 struct bio bp;
1025
1026 vol = tr->tro_volume;
1027 sc = vol->v_softc;
1028
1029 bzero(&bp, sizeof(bp));
1030 bp.bio_cmd = BIO_WRITE;
1031 bp.bio_done = g_raid_tr_kerneldump_common_done;
1032 bp.bio_attribute = NULL;
1033 bp.bio_offset = offset;
1034 bp.bio_length = length;
1035 bp.bio_data = virtual;
1036 bp.bio_to = vol->v_provider;
1037
1038 g_raid_start(&bp);
1039 while (!(bp.bio_flags & BIO_DONE)) {
1040 G_RAID_DEBUG1(4, sc, "Poll...");
1041 g_raid_poll(sc);
1042 DELAY(10);
1043 }
1044
1045 return (bp.bio_error != 0 ? EIO : 0);
1046 }
1047
1048 static int
1049 g_raid_dump(void *arg,
1050 void *virtual, vm_offset_t physical, off_t offset, size_t length)
1051 {
1052 struct g_raid_volume *vol;
1053 int error;
1054
1055 vol = (struct g_raid_volume *)arg;
1056 G_RAID_DEBUG1(3, vol->v_softc, "Dumping at off %llu len %llu.",
1057 (long long unsigned)offset, (long long unsigned)length);
1058
1059 error = G_RAID_TR_KERNELDUMP(vol->v_tr,
1060 virtual, physical, offset, length);
1061 return (error);
1062 }
1063
1064 static void
1065 g_raid_kerneldump(struct g_raid_softc *sc, struct bio *bp)
1066 {
1067 struct g_kerneldump *gkd;
1068 struct g_provider *pp;
1069 struct g_raid_volume *vol;
1070
1071 gkd = (struct g_kerneldump*)bp->bio_data;
1072 pp = bp->bio_to;
1073 vol = pp->private;
1074 g_trace(G_T_TOPOLOGY, "g_raid_kerneldump(%s, %jd, %jd)",
1075 pp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length);
1076 gkd->di.dumper = g_raid_dump;
1077 gkd->di.priv = vol;
1078 gkd->di.blocksize = vol->v_sectorsize;
1079 gkd->di.maxiosize = DFLTPHYS;
1080 gkd->di.mediaoffset = gkd->offset;
1081 if ((gkd->offset + gkd->length) > vol->v_mediasize)
1082 gkd->length = vol->v_mediasize - gkd->offset;
1083 gkd->di.mediasize = gkd->length;
1084 g_io_deliver(bp, 0);
1085 }
1086
1087 static void
1088 g_raid_candelete(struct g_raid_softc *sc, struct bio *bp)
1089 {
1090 struct g_provider *pp;
1091 struct g_raid_volume *vol;
1092 struct g_raid_subdisk *sd;
1093 int *val;
1094 int i;
1095
1096 val = (int *)bp->bio_data;
1097 pp = bp->bio_to;
1098 vol = pp->private;
1099 *val = 0;
1100 for (i = 0; i < vol->v_disks_count; i++) {
1101 sd = &vol->v_subdisks[i];
1102 if (sd->sd_state == G_RAID_SUBDISK_S_NONE)
1103 continue;
1104 if (sd->sd_disk->d_candelete) {
1105 *val = 1;
1106 break;
1107 }
1108 }
1109 g_io_deliver(bp, 0);
1110 }
1111
1112 static void
1113 g_raid_start(struct bio *bp)
1114 {
1115 struct g_raid_softc *sc;
1116
1117 sc = bp->bio_to->geom->softc;
1118 /*
1119 * If sc == NULL or there are no valid disks, provider's error
1120 * should be set and g_raid_start() should not be called at all.
1121 */
1122 // KASSERT(sc != NULL && sc->sc_state == G_RAID_VOLUME_S_RUNNING,
1123 // ("Provider's error should be set (error=%d)(mirror=%s).",
1124 // bp->bio_to->error, bp->bio_to->name));
1125 G_RAID_LOGREQ(3, bp, "Request received.");
1126
1127 switch (bp->bio_cmd) {
1128 case BIO_READ:
1129 case BIO_WRITE:
1130 case BIO_DELETE:
1131 case BIO_FLUSH:
1132 break;
1133 case BIO_GETATTR:
1134 if (!strcmp(bp->bio_attribute, "GEOM::candelete"))
1135 g_raid_candelete(sc, bp);
1136 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
1137 g_raid_kerneldump(sc, bp);
1138 else
1139 g_io_deliver(bp, EOPNOTSUPP);
1140 return;
1141 default:
1142 g_io_deliver(bp, EOPNOTSUPP);
1143 return;
1144 }
1145 mtx_lock(&sc->sc_queue_mtx);
1146 bioq_insert_tail(&sc->sc_queue, bp);
1147 mtx_unlock(&sc->sc_queue_mtx);
1148 if (!dumping) {
1149 G_RAID_DEBUG1(4, sc, "Waking up %p.", sc);
1150 wakeup(sc);
1151 }
1152 }
1153
1154 static int
1155 g_raid_bio_overlaps(const struct bio *bp, off_t lstart, off_t len)
1156 {
1157 /*
1158 * 5 cases:
1159 * (1) bp entirely below NO
1160 * (2) bp entirely above NO
1161 * (3) bp start below, but end in range YES
1162 * (4) bp entirely within YES
1163 * (5) bp starts within, ends above YES
1164 *
1165 * lock range 10-19 (offset 10 length 10)
1166 * (1) 1-5: first if kicks it out
1167 * (2) 30-35: second if kicks it out
1168 * (3) 5-15: passes both ifs
1169 * (4) 12-14: passes both ifs
1170 * (5) 19-20: passes both
1171 */
1172 off_t lend = lstart + len - 1;
1173 off_t bstart = bp->bio_offset;
1174 off_t bend = bp->bio_offset + bp->bio_length - 1;
1175
1176 if (bend < lstart)
1177 return (0);
1178 if (lend < bstart)
1179 return (0);
1180 return (1);
1181 }
1182
1183 static int
1184 g_raid_is_in_locked_range(struct g_raid_volume *vol, const struct bio *bp)
1185 {
1186 struct g_raid_lock *lp;
1187
1188 sx_assert(&vol->v_softc->sc_lock, SX_LOCKED);
1189
1190 LIST_FOREACH(lp, &vol->v_locks, l_next) {
1191 if (g_raid_bio_overlaps(bp, lp->l_offset, lp->l_length))
1192 return (1);
1193 }
1194 return (0);
1195 }
1196
1197 static void
1198 g_raid_start_request(struct bio *bp)
1199 {
1200 struct g_raid_softc *sc;
1201 struct g_raid_volume *vol;
1202
1203 sc = bp->bio_to->geom->softc;
1204 sx_assert(&sc->sc_lock, SX_LOCKED);
1205 vol = bp->bio_to->private;
1206
1207 /*
1208 * Check to see if this item is in a locked range. If so,
1209 * queue it to our locked queue and return. We'll requeue
1210 * it when the range is unlocked. Internal I/O for the
1211 * rebuild/rescan/recovery process is excluded from this
1212 * check so we can actually do the recovery.
1213 */
1214 if (!(bp->bio_cflags & G_RAID_BIO_FLAG_SPECIAL) &&
1215 g_raid_is_in_locked_range(vol, bp)) {
1216 G_RAID_LOGREQ(3, bp, "Defer request.");
1217 bioq_insert_tail(&vol->v_locked, bp);
1218 return;
1219 }
1220
1221 /*
1222 * If we're actually going to do the write/delete, then
1223 * update the idle stats for the volume.
1224 */
1225 if (bp->bio_cmd == BIO_WRITE || bp->bio_cmd == BIO_DELETE) {
1226 if (!vol->v_dirty)
1227 g_raid_dirty(vol);
1228 vol->v_writes++;
1229 }
1230
1231 /*
1232 * Put request onto inflight queue, so we can check if new
1233 * synchronization requests don't collide with it. Then tell
1234 * the transformation layer to start the I/O.
1235 */
1236 bioq_insert_tail(&vol->v_inflight, bp);
1237 G_RAID_LOGREQ(4, bp, "Request started");
1238 G_RAID_TR_IOSTART(vol->v_tr, bp);
1239 }
1240
1241 static void
1242 g_raid_finish_with_locked_ranges(struct g_raid_volume *vol, struct bio *bp)
1243 {
1244 off_t off, len;
1245 struct bio *nbp;
1246 struct g_raid_lock *lp;
1247
1248 vol->v_pending_lock = 0;
1249 LIST_FOREACH(lp, &vol->v_locks, l_next) {
1250 if (lp->l_pending) {
1251 off = lp->l_offset;
1252 len = lp->l_length;
1253 lp->l_pending = 0;
1254 TAILQ_FOREACH(nbp, &vol->v_inflight.queue, bio_queue) {
1255 if (g_raid_bio_overlaps(nbp, off, len))
1256 lp->l_pending++;
1257 }
1258 if (lp->l_pending) {
1259 vol->v_pending_lock = 1;
1260 G_RAID_DEBUG1(4, vol->v_softc,
1261 "Deferred lock(%jd, %jd) has %d pending",
1262 (intmax_t)off, (intmax_t)(off + len),
1263 lp->l_pending);
1264 continue;
1265 }
1266 G_RAID_DEBUG1(4, vol->v_softc,
1267 "Deferred lock of %jd to %jd completed",
1268 (intmax_t)off, (intmax_t)(off + len));
1269 G_RAID_TR_LOCKED(vol->v_tr, lp->l_callback_arg);
1270 }
1271 }
1272 }
1273
1274 void
1275 g_raid_iodone(struct bio *bp, int error)
1276 {
1277 struct g_raid_softc *sc;
1278 struct g_raid_volume *vol;
1279
1280 sc = bp->bio_to->geom->softc;
1281 sx_assert(&sc->sc_lock, SX_LOCKED);
1282 vol = bp->bio_to->private;
1283 G_RAID_LOGREQ(3, bp, "Request done: %d.", error);
1284
1285 /* Update stats if we done write/delete. */
1286 if (bp->bio_cmd == BIO_WRITE || bp->bio_cmd == BIO_DELETE) {
1287 vol->v_writes--;
1288 vol->v_last_write = time_uptime;
1289 }
1290
1291 bioq_remove(&vol->v_inflight, bp);
1292 if (vol->v_pending_lock && g_raid_is_in_locked_range(vol, bp))
1293 g_raid_finish_with_locked_ranges(vol, bp);
1294 getmicrouptime(&vol->v_last_done);
1295 g_io_deliver(bp, error);
1296 }
1297
1298 int
1299 g_raid_lock_range(struct g_raid_volume *vol, off_t off, off_t len,
1300 struct bio *ignore, void *argp)
1301 {
1302 struct g_raid_softc *sc;
1303 struct g_raid_lock *lp;
1304 struct bio *bp;
1305
1306 sc = vol->v_softc;
1307 lp = malloc(sizeof(*lp), M_RAID, M_WAITOK | M_ZERO);
1308 LIST_INSERT_HEAD(&vol->v_locks, lp, l_next);
1309 lp->l_offset = off;
1310 lp->l_length = len;
1311 lp->l_callback_arg = argp;
1312
1313 lp->l_pending = 0;
1314 TAILQ_FOREACH(bp, &vol->v_inflight.queue, bio_queue) {
1315 if (bp != ignore && g_raid_bio_overlaps(bp, off, len))
1316 lp->l_pending++;
1317 }
1318
1319 /*
1320 * If there are any writes that are pending, we return EBUSY. All
1321 * callers will have to wait until all pending writes clear.
1322 */
1323 if (lp->l_pending > 0) {
1324 vol->v_pending_lock = 1;
1325 G_RAID_DEBUG1(4, sc, "Locking range %jd to %jd deferred %d pend",
1326 (intmax_t)off, (intmax_t)(off+len), lp->l_pending);
1327 return (EBUSY);
1328 }
1329 G_RAID_DEBUG1(4, sc, "Locking range %jd to %jd",
1330 (intmax_t)off, (intmax_t)(off+len));
1331 G_RAID_TR_LOCKED(vol->v_tr, lp->l_callback_arg);
1332 return (0);
1333 }
1334
1335 int
1336 g_raid_unlock_range(struct g_raid_volume *vol, off_t off, off_t len)
1337 {
1338 struct g_raid_lock *lp;
1339 struct g_raid_softc *sc;
1340 struct bio *bp;
1341
1342 sc = vol->v_softc;
1343 LIST_FOREACH(lp, &vol->v_locks, l_next) {
1344 if (lp->l_offset == off && lp->l_length == len) {
1345 LIST_REMOVE(lp, l_next);
1346 /* XXX
1347 * Right now we just put them all back on the queue
1348 * and hope for the best. We hope this because any
1349 * locked ranges will go right back on this list
1350 * when the worker thread runs.
1351 * XXX
1352 */
1353 G_RAID_DEBUG1(4, sc, "Unlocked %jd to %jd",
1354 (intmax_t)lp->l_offset,
1355 (intmax_t)(lp->l_offset+lp->l_length));
1356 mtx_lock(&sc->sc_queue_mtx);
1357 while ((bp = bioq_takefirst(&vol->v_locked)) != NULL)
1358 bioq_insert_tail(&sc->sc_queue, bp);
1359 mtx_unlock(&sc->sc_queue_mtx);
1360 free(lp, M_RAID);
1361 return (0);
1362 }
1363 }
1364 return (EINVAL);
1365 }
1366
1367 void
1368 g_raid_subdisk_iostart(struct g_raid_subdisk *sd, struct bio *bp)
1369 {
1370 struct g_consumer *cp;
1371 struct g_raid_disk *disk, *tdisk;
1372
1373 bp->bio_caller1 = sd;
1374
1375 /*
1376 * Make sure that the disk is present. Generally it is a task of
1377 * transformation layers to not send requests to absent disks, but
1378 * it is better to be safe and report situation then sorry.
1379 */
1380 if (sd->sd_disk == NULL) {
1381 G_RAID_LOGREQ(0, bp, "Warning! I/O request to an absent disk!");
1382 nodisk:
1383 bp->bio_from = NULL;
1384 bp->bio_to = NULL;
1385 bp->bio_error = ENXIO;
1386 g_raid_disk_done(bp);
1387 return;
1388 }
1389 disk = sd->sd_disk;
1390 if (disk->d_state != G_RAID_DISK_S_ACTIVE &&
1391 disk->d_state != G_RAID_DISK_S_FAILED) {
1392 G_RAID_LOGREQ(0, bp, "Warning! I/O request to a disk in a "
1393 "wrong state (%s)!", g_raid_disk_state2str(disk->d_state));
1394 goto nodisk;
1395 }
1396
1397 cp = disk->d_consumer;
1398 bp->bio_from = cp;
1399 bp->bio_to = cp->provider;
1400 cp->index++;
1401
1402 /* Update average disks load. */
1403 TAILQ_FOREACH(tdisk, &sd->sd_softc->sc_disks, d_next) {
1404 if (tdisk->d_consumer == NULL)
1405 tdisk->d_load = 0;
1406 else
1407 tdisk->d_load = (tdisk->d_consumer->index *
1408 G_RAID_SUBDISK_LOAD_SCALE + tdisk->d_load * 7) / 8;
1409 }
1410
1411 disk->d_last_offset = bp->bio_offset + bp->bio_length;
1412 if (dumping) {
1413 G_RAID_LOGREQ(3, bp, "Sending dumping request.");
1414 if (bp->bio_cmd == BIO_WRITE) {
1415 bp->bio_error = g_raid_subdisk_kerneldump(sd,
1416 bp->bio_data, 0, bp->bio_offset, bp->bio_length);
1417 } else
1418 bp->bio_error = EOPNOTSUPP;
1419 g_raid_disk_done(bp);
1420 } else {
1421 bp->bio_done = g_raid_disk_done;
1422 bp->bio_offset += sd->sd_offset;
1423 G_RAID_LOGREQ(3, bp, "Sending request.");
1424 g_io_request(bp, cp);
1425 }
1426 }
1427
1428 int
1429 g_raid_subdisk_kerneldump(struct g_raid_subdisk *sd,
1430 void *virtual, vm_offset_t physical, off_t offset, size_t length)
1431 {
1432
1433 if (sd->sd_disk == NULL)
1434 return (ENXIO);
1435 if (sd->sd_disk->d_kd.di.dumper == NULL)
1436 return (EOPNOTSUPP);
1437 return (dump_write(&sd->sd_disk->d_kd.di,
1438 virtual, physical,
1439 sd->sd_disk->d_kd.di.mediaoffset + sd->sd_offset + offset,
1440 length));
1441 }
1442
1443 static void
1444 g_raid_disk_done(struct bio *bp)
1445 {
1446 struct g_raid_softc *sc;
1447 struct g_raid_subdisk *sd;
1448
1449 sd = bp->bio_caller1;
1450 sc = sd->sd_softc;
1451 mtx_lock(&sc->sc_queue_mtx);
1452 bioq_insert_tail(&sc->sc_queue, bp);
1453 mtx_unlock(&sc->sc_queue_mtx);
1454 if (!dumping)
1455 wakeup(sc);
1456 }
1457
1458 static void
1459 g_raid_disk_done_request(struct bio *bp)
1460 {
1461 struct g_raid_softc *sc;
1462 struct g_raid_disk *disk;
1463 struct g_raid_subdisk *sd;
1464 struct g_raid_volume *vol;
1465
1466 g_topology_assert_not();
1467
1468 G_RAID_LOGREQ(3, bp, "Disk request done: %d.", bp->bio_error);
1469 sd = bp->bio_caller1;
1470 sc = sd->sd_softc;
1471 vol = sd->sd_volume;
1472 if (bp->bio_from != NULL) {
1473 bp->bio_from->index--;
1474 disk = bp->bio_from->private;
1475 if (disk == NULL)
1476 g_raid_kill_consumer(sc, bp->bio_from);
1477 }
1478 bp->bio_offset -= sd->sd_offset;
1479
1480 G_RAID_TR_IODONE(vol->v_tr, sd, bp);
1481 }
1482
1483 static void
1484 g_raid_handle_event(struct g_raid_softc *sc, struct g_raid_event *ep)
1485 {
1486
1487 if ((ep->e_flags & G_RAID_EVENT_VOLUME) != 0)
1488 ep->e_error = g_raid_update_volume(ep->e_tgt, ep->e_event);
1489 else if ((ep->e_flags & G_RAID_EVENT_DISK) != 0)
1490 ep->e_error = g_raid_update_disk(ep->e_tgt, ep->e_event);
1491 else if ((ep->e_flags & G_RAID_EVENT_SUBDISK) != 0)
1492 ep->e_error = g_raid_update_subdisk(ep->e_tgt, ep->e_event);
1493 else
1494 ep->e_error = g_raid_update_node(ep->e_tgt, ep->e_event);
1495 if ((ep->e_flags & G_RAID_EVENT_WAIT) == 0) {
1496 KASSERT(ep->e_error == 0,
1497 ("Error cannot be handled."));
1498 g_raid_event_free(ep);
1499 } else {
1500 ep->e_flags |= G_RAID_EVENT_DONE;
1501 G_RAID_DEBUG1(4, sc, "Waking up %p.", ep);
1502 mtx_lock(&sc->sc_queue_mtx);
1503 wakeup(ep);
1504 mtx_unlock(&sc->sc_queue_mtx);
1505 }
1506 }
1507
1508 /*
1509 * Worker thread.
1510 */
1511 static void
1512 g_raid_worker(void *arg)
1513 {
1514 struct g_raid_softc *sc;
1515 struct g_raid_event *ep;
1516 struct g_raid_volume *vol;
1517 struct bio *bp;
1518 struct timeval now, t;
1519 int timeout, rv;
1520
1521 sc = arg;
1522 thread_lock(curthread);
1523 sched_prio(curthread, PRIBIO);
1524 thread_unlock(curthread);
1525
1526 sx_xlock(&sc->sc_lock);
1527 for (;;) {
1528 mtx_lock(&sc->sc_queue_mtx);
1529 /*
1530 * First take a look at events.
1531 * This is important to handle events before any I/O requests.
1532 */
1533 bp = NULL;
1534 vol = NULL;
1535 rv = 0;
1536 ep = TAILQ_FIRST(&sc->sc_events);
1537 if (ep != NULL)
1538 TAILQ_REMOVE(&sc->sc_events, ep, e_next);
1539 else if ((bp = bioq_takefirst(&sc->sc_queue)) != NULL)
1540 ;
1541 else {
1542 getmicrouptime(&now);
1543 t = now;
1544 TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) {
1545 if (bioq_first(&vol->v_inflight) == NULL &&
1546 vol->v_tr &&
1547 timevalcmp(&vol->v_last_done, &t, < ))
1548 t = vol->v_last_done;
1549 }
1550 timevalsub(&t, &now);
1551 timeout = g_raid_idle_threshold +
1552 t.tv_sec * 1000000 + t.tv_usec;
1553 if (timeout > 0) {
1554 /*
1555 * Two steps to avoid overflows at HZ=1000
1556 * and idle timeouts > 2.1s. Some rounding
1557 * errors can occur, but they are < 1tick,
1558 * which is deemed to be close enough for
1559 * this purpose.
1560 */
1561 int micpertic = 1000000 / hz;
1562 timeout = (timeout + micpertic - 1) / micpertic;
1563 sx_xunlock(&sc->sc_lock);
1564 MSLEEP(rv, sc, &sc->sc_queue_mtx,
1565 PRIBIO | PDROP, "-", timeout);
1566 sx_xlock(&sc->sc_lock);
1567 goto process;
1568 } else
1569 rv = EWOULDBLOCK;
1570 }
1571 mtx_unlock(&sc->sc_queue_mtx);
1572 process:
1573 if (ep != NULL) {
1574 g_raid_handle_event(sc, ep);
1575 } else if (bp != NULL) {
1576 if (bp->bio_to != NULL &&
1577 bp->bio_to->geom == sc->sc_geom)
1578 g_raid_start_request(bp);
1579 else
1580 g_raid_disk_done_request(bp);
1581 } else if (rv == EWOULDBLOCK) {
1582 TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) {
1583 g_raid_clean(vol, -1);
1584 if (bioq_first(&vol->v_inflight) == NULL &&
1585 vol->v_tr) {
1586 t.tv_sec = g_raid_idle_threshold / 1000000;
1587 t.tv_usec = g_raid_idle_threshold % 1000000;
1588 timevaladd(&t, &vol->v_last_done);
1589 getmicrouptime(&now);
1590 if (timevalcmp(&t, &now, <= )) {
1591 G_RAID_TR_IDLE(vol->v_tr);
1592 vol->v_last_done = now;
1593 }
1594 }
1595 }
1596 }
1597 if (sc->sc_stopping == G_RAID_DESTROY_HARD)
1598 g_raid_destroy_node(sc, 1); /* May not return. */
1599 }
1600 }
1601
1602 static void
1603 g_raid_poll(struct g_raid_softc *sc)
1604 {
1605 struct g_raid_event *ep;
1606 struct bio *bp;
1607
1608 sx_xlock(&sc->sc_lock);
1609 mtx_lock(&sc->sc_queue_mtx);
1610 /*
1611 * First take a look at events.
1612 * This is important to handle events before any I/O requests.
1613 */
1614 ep = TAILQ_FIRST(&sc->sc_events);
1615 if (ep != NULL) {
1616 TAILQ_REMOVE(&sc->sc_events, ep, e_next);
1617 mtx_unlock(&sc->sc_queue_mtx);
1618 g_raid_handle_event(sc, ep);
1619 goto out;
1620 }
1621 bp = bioq_takefirst(&sc->sc_queue);
1622 if (bp != NULL) {
1623 mtx_unlock(&sc->sc_queue_mtx);
1624 if (bp->bio_from == NULL ||
1625 bp->bio_from->geom != sc->sc_geom)
1626 g_raid_start_request(bp);
1627 else
1628 g_raid_disk_done_request(bp);
1629 }
1630 out:
1631 sx_xunlock(&sc->sc_lock);
1632 }
1633
1634 static void
1635 g_raid_launch_provider(struct g_raid_volume *vol)
1636 {
1637 struct g_raid_disk *disk;
1638 struct g_raid_subdisk *sd;
1639 struct g_raid_softc *sc;
1640 struct g_provider *pp;
1641 char name[G_RAID_MAX_VOLUMENAME];
1642 char announce_buf[80], buf1[32];
1643 off_t off;
1644 int i;
1645
1646 sc = vol->v_softc;
1647 sx_assert(&sc->sc_lock, SX_LOCKED);
1648
1649 g_topology_lock();
1650 /* Try to name provider with volume name. */
1651 snprintf(name, sizeof(name), "raid/%s", vol->v_name);
1652 if (g_raid_name_format == 0 || vol->v_name[0] == 0 ||
1653 g_provider_by_name(name) != NULL) {
1654 /* Otherwise use sequential volume number. */
1655 snprintf(name, sizeof(name), "raid/r%d", vol->v_global_id);
1656 }
1657
1658 /*
1659 * Create a /dev/ar%d that the old ataraid(4) stack once
1660 * created as an alias for /dev/raid/r%d if requested.
1661 * This helps going from stable/7 ataraid devices to newer
1662 * FreeBSD releases. sbruno 07 MAY 2013
1663 */
1664
1665 if (ar_legacy_aliases) {
1666 snprintf(announce_buf, sizeof(announce_buf),
1667 "kern.devalias.%s", name);
1668 snprintf(buf1, sizeof(buf1),
1669 "ar%d", vol->v_global_id);
1670 setenv(announce_buf, buf1);
1671 }
1672
1673 pp = g_new_providerf(sc->sc_geom, "%s", name);
1674 pp->flags |= G_PF_DIRECT_RECEIVE;
1675 if (vol->v_tr->tro_class->trc_accept_unmapped) {
1676 pp->flags |= G_PF_ACCEPT_UNMAPPED;
1677 for (i = 0; i < vol->v_disks_count; i++) {
1678 sd = &vol->v_subdisks[i];
1679 if (sd->sd_state == G_RAID_SUBDISK_S_NONE)
1680 continue;
1681 if ((sd->sd_disk->d_consumer->provider->flags &
1682 G_PF_ACCEPT_UNMAPPED) == 0)
1683 pp->flags &= ~G_PF_ACCEPT_UNMAPPED;
1684 }
1685 }
1686 pp->private = vol;
1687 pp->mediasize = vol->v_mediasize;
1688 pp->sectorsize = vol->v_sectorsize;
1689 pp->stripesize = 0;
1690 pp->stripeoffset = 0;
1691 if (vol->v_raid_level == G_RAID_VOLUME_RL_RAID1 ||
1692 vol->v_raid_level == G_RAID_VOLUME_RL_RAID3 ||
1693 vol->v_raid_level == G_RAID_VOLUME_RL_SINGLE ||
1694 vol->v_raid_level == G_RAID_VOLUME_RL_CONCAT) {
1695 if ((disk = vol->v_subdisks[0].sd_disk) != NULL &&
1696 disk->d_consumer != NULL &&
1697 disk->d_consumer->provider != NULL) {
1698 pp->stripesize = disk->d_consumer->provider->stripesize;
1699 off = disk->d_consumer->provider->stripeoffset;
1700 pp->stripeoffset = off + vol->v_subdisks[0].sd_offset;
1701 if (off > 0)
1702 pp->stripeoffset %= off;
1703 }
1704 if (vol->v_raid_level == G_RAID_VOLUME_RL_RAID3) {
1705 pp->stripesize *= (vol->v_disks_count - 1);
1706 pp->stripeoffset *= (vol->v_disks_count - 1);
1707 }
1708 } else
1709 pp->stripesize = vol->v_strip_size;
1710 vol->v_provider = pp;
1711 g_error_provider(pp, 0);
1712 g_topology_unlock();
1713 G_RAID_DEBUG1(0, sc, "Provider %s for volume %s created.",
1714 pp->name, vol->v_name);
1715 }
1716
1717 static void
1718 g_raid_destroy_provider(struct g_raid_volume *vol)
1719 {
1720 struct g_raid_softc *sc;
1721 struct g_provider *pp;
1722 struct bio *bp, *tmp;
1723
1724 g_topology_assert_not();
1725 sc = vol->v_softc;
1726 pp = vol->v_provider;
1727 KASSERT(pp != NULL, ("NULL provider (volume=%s).", vol->v_name));
1728
1729 g_topology_lock();
1730 g_error_provider(pp, ENXIO);
1731 mtx_lock(&sc->sc_queue_mtx);
1732 TAILQ_FOREACH_SAFE(bp, &sc->sc_queue.queue, bio_queue, tmp) {
1733 if (bp->bio_to != pp)
1734 continue;
1735 bioq_remove(&sc->sc_queue, bp);
1736 g_io_deliver(bp, ENXIO);
1737 }
1738 mtx_unlock(&sc->sc_queue_mtx);
1739 G_RAID_DEBUG1(0, sc, "Provider %s for volume %s destroyed.",
1740 pp->name, vol->v_name);
1741 g_wither_provider(pp, ENXIO);
1742 g_topology_unlock();
1743 vol->v_provider = NULL;
1744 }
1745
1746 /*
1747 * Update device state.
1748 */
1749 static int
1750 g_raid_update_volume(struct g_raid_volume *vol, u_int event)
1751 {
1752 struct g_raid_softc *sc;
1753
1754 sc = vol->v_softc;
1755 sx_assert(&sc->sc_lock, SX_XLOCKED);
1756
1757 G_RAID_DEBUG1(2, sc, "Event %s for volume %s.",
1758 g_raid_volume_event2str(event),
1759 vol->v_name);
1760 switch (event) {
1761 case G_RAID_VOLUME_E_DOWN:
1762 if (vol->v_provider != NULL)
1763 g_raid_destroy_provider(vol);
1764 break;
1765 case G_RAID_VOLUME_E_UP:
1766 if (vol->v_provider == NULL)
1767 g_raid_launch_provider(vol);
1768 break;
1769 case G_RAID_VOLUME_E_START:
1770 if (vol->v_tr)
1771 G_RAID_TR_START(vol->v_tr);
1772 return (0);
1773 default:
1774 if (sc->sc_md)
1775 G_RAID_MD_VOLUME_EVENT(sc->sc_md, vol, event);
1776 return (0);
1777 }
1778
1779 /* Manage root mount release. */
1780 if (vol->v_starting) {
1781 vol->v_starting = 0;
1782 G_RAID_DEBUG1(1, sc, "root_mount_rel %p", vol->v_rootmount);
1783 root_mount_rel(vol->v_rootmount);
1784 vol->v_rootmount = NULL;
1785 }
1786 if (vol->v_stopping && vol->v_provider_open == 0)
1787 g_raid_destroy_volume(vol);
1788 return (0);
1789 }
1790
1791 /*
1792 * Update subdisk state.
1793 */
1794 static int
1795 g_raid_update_subdisk(struct g_raid_subdisk *sd, u_int event)
1796 {
1797 struct g_raid_softc *sc;
1798 struct g_raid_volume *vol;
1799
1800 sc = sd->sd_softc;
1801 vol = sd->sd_volume;
1802 sx_assert(&sc->sc_lock, SX_XLOCKED);
1803
1804 G_RAID_DEBUG1(2, sc, "Event %s for subdisk %s:%d-%s.",
1805 g_raid_subdisk_event2str(event),
1806 vol->v_name, sd->sd_pos,
1807 sd->sd_disk ? g_raid_get_diskname(sd->sd_disk) : "[none]");
1808 if (vol->v_tr)
1809 G_RAID_TR_EVENT(vol->v_tr, sd, event);
1810
1811 return (0);
1812 }
1813
1814 /*
1815 * Update disk state.
1816 */
1817 static int
1818 g_raid_update_disk(struct g_raid_disk *disk, u_int event)
1819 {
1820 struct g_raid_softc *sc;
1821
1822 sc = disk->d_softc;
1823 sx_assert(&sc->sc_lock, SX_XLOCKED);
1824
1825 G_RAID_DEBUG1(2, sc, "Event %s for disk %s.",
1826 g_raid_disk_event2str(event),
1827 g_raid_get_diskname(disk));
1828
1829 if (sc->sc_md)
1830 G_RAID_MD_EVENT(sc->sc_md, disk, event);
1831 return (0);
1832 }
1833
1834 /*
1835 * Node event.
1836 */
1837 static int
1838 g_raid_update_node(struct g_raid_softc *sc, u_int event)
1839 {
1840 sx_assert(&sc->sc_lock, SX_XLOCKED);
1841
1842 G_RAID_DEBUG1(2, sc, "Event %s for the array.",
1843 g_raid_node_event2str(event));
1844
1845 if (event == G_RAID_NODE_E_WAKE)
1846 return (0);
1847 if (sc->sc_md)
1848 G_RAID_MD_EVENT(sc->sc_md, NULL, event);
1849 return (0);
1850 }
1851
1852 static int
1853 g_raid_access(struct g_provider *pp, int acr, int acw, int ace)
1854 {
1855 struct g_raid_volume *vol;
1856 struct g_raid_softc *sc;
1857 int dcw, opens, error = 0;
1858
1859 g_topology_assert();
1860 sc = pp->geom->softc;
1861 vol = pp->private;
1862 KASSERT(sc != NULL, ("NULL softc (provider=%s).", pp->name));
1863 KASSERT(vol != NULL, ("NULL volume (provider=%s).", pp->name));
1864
1865 G_RAID_DEBUG1(2, sc, "Access request for %s: r%dw%de%d.", pp->name,
1866 acr, acw, ace);
1867 dcw = pp->acw + acw;
1868
1869 g_topology_unlock();
1870 sx_xlock(&sc->sc_lock);
1871 /* Deny new opens while dying. */
1872 if (sc->sc_stopping != 0 && (acr > 0 || acw > 0 || ace > 0)) {
1873 error = ENXIO;
1874 goto out;
1875 }
1876 /* Deny write opens for read-only volumes. */
1877 if (vol->v_read_only && acw > 0) {
1878 error = EROFS;
1879 goto out;
1880 }
1881 if (dcw == 0)
1882 g_raid_clean(vol, dcw);
1883 vol->v_provider_open += acr + acw + ace;
1884 /* Handle delayed node destruction. */
1885 if (sc->sc_stopping == G_RAID_DESTROY_DELAYED &&
1886 vol->v_provider_open == 0) {
1887 /* Count open volumes. */
1888 opens = g_raid_nopens(sc);
1889 if (opens == 0) {
1890 sc->sc_stopping = G_RAID_DESTROY_HARD;
1891 /* Wake up worker to make it selfdestruct. */
1892 g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0);
1893 }
1894 }
1895 /* Handle open volume destruction. */
1896 if (vol->v_stopping && vol->v_provider_open == 0)
1897 g_raid_destroy_volume(vol);
1898 out:
1899 sx_xunlock(&sc->sc_lock);
1900 g_topology_lock();
1901 return (error);
1902 }
1903
1904 struct g_raid_softc *
1905 g_raid_create_node(struct g_class *mp,
1906 const char *name, struct g_raid_md_object *md)
1907 {
1908 struct g_raid_softc *sc;
1909 struct g_geom *gp;
1910 int error;
1911
1912 g_topology_assert();
1913 G_RAID_DEBUG(1, "Creating array %s.", name);
1914
1915 gp = g_new_geomf(mp, "%s", name);
1916 sc = malloc(sizeof(*sc), M_RAID, M_WAITOK | M_ZERO);
1917 gp->start = g_raid_start;
1918 gp->orphan = g_raid_orphan;
1919 gp->access = g_raid_access;
1920 gp->dumpconf = g_raid_dumpconf;
1921
1922 sc->sc_md = md;
1923 sc->sc_geom = gp;
1924 sc->sc_flags = 0;
1925 TAILQ_INIT(&sc->sc_volumes);
1926 TAILQ_INIT(&sc->sc_disks);
1927 sx_init(&sc->sc_lock, "graid:lock");
1928 mtx_init(&sc->sc_queue_mtx, "graid:queue", NULL, MTX_DEF);
1929 TAILQ_INIT(&sc->sc_events);
1930 bioq_init(&sc->sc_queue);
1931 gp->softc = sc;
1932 error = kproc_create(g_raid_worker, sc, &sc->sc_worker, 0, 0,
1933 "g_raid %s", name);
1934 if (error != 0) {
1935 G_RAID_DEBUG(0, "Cannot create kernel thread for %s.", name);
1936 mtx_destroy(&sc->sc_queue_mtx);
1937 sx_destroy(&sc->sc_lock);
1938 g_destroy_geom(sc->sc_geom);
1939 free(sc, M_RAID);
1940 return (NULL);
1941 }
1942
1943 G_RAID_DEBUG1(0, sc, "Array %s created.", name);
1944 return (sc);
1945 }
1946
1947 struct g_raid_volume *
1948 g_raid_create_volume(struct g_raid_softc *sc, const char *name, int id)
1949 {
1950 struct g_raid_volume *vol, *vol1;
1951 int i;
1952
1953 G_RAID_DEBUG1(1, sc, "Creating volume %s.", name);
1954 vol = malloc(sizeof(*vol), M_RAID, M_WAITOK | M_ZERO);
1955 vol->v_softc = sc;
1956 strlcpy(vol->v_name, name, G_RAID_MAX_VOLUMENAME);
1957 vol->v_state = G_RAID_VOLUME_S_STARTING;
1958 vol->v_raid_level = G_RAID_VOLUME_RL_UNKNOWN;
1959 vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_UNKNOWN;
1960 vol->v_rotate_parity = 1;
1961 bioq_init(&vol->v_inflight);
1962 bioq_init(&vol->v_locked);
1963 LIST_INIT(&vol->v_locks);
1964 for (i = 0; i < G_RAID_MAX_SUBDISKS; i++) {
1965 vol->v_subdisks[i].sd_softc = sc;
1966 vol->v_subdisks[i].sd_volume = vol;
1967 vol->v_subdisks[i].sd_pos = i;
1968 vol->v_subdisks[i].sd_state = G_RAID_DISK_S_NONE;
1969 }
1970
1971 /* Find free ID for this volume. */
1972 g_topology_lock();
1973 vol1 = vol;
1974 if (id >= 0) {
1975 LIST_FOREACH(vol1, &g_raid_volumes, v_global_next) {
1976 if (vol1->v_global_id == id)
1977 break;
1978 }
1979 }
1980 if (vol1 != NULL) {
1981 for (id = 0; ; id++) {
1982 LIST_FOREACH(vol1, &g_raid_volumes, v_global_next) {
1983 if (vol1->v_global_id == id)
1984 break;
1985 }
1986 if (vol1 == NULL)
1987 break;
1988 }
1989 }
1990 vol->v_global_id = id;
1991 LIST_INSERT_HEAD(&g_raid_volumes, vol, v_global_next);
1992 g_topology_unlock();
1993
1994 /* Delay root mounting. */
1995 vol->v_rootmount = root_mount_hold("GRAID");
1996 G_RAID_DEBUG1(1, sc, "root_mount_hold %p", vol->v_rootmount);
1997 vol->v_starting = 1;
1998 TAILQ_INSERT_TAIL(&sc->sc_volumes, vol, v_next);
1999 return (vol);
2000 }
2001
2002 struct g_raid_disk *
2003 g_raid_create_disk(struct g_raid_softc *sc)
2004 {
2005 struct g_raid_disk *disk;
2006
2007 G_RAID_DEBUG1(1, sc, "Creating disk.");
2008 disk = malloc(sizeof(*disk), M_RAID, M_WAITOK | M_ZERO);
2009 disk->d_softc = sc;
2010 disk->d_state = G_RAID_DISK_S_NONE;
2011 TAILQ_INIT(&disk->d_subdisks);
2012 TAILQ_INSERT_TAIL(&sc->sc_disks, disk, d_next);
2013 return (disk);
2014 }
2015
2016 int g_raid_start_volume(struct g_raid_volume *vol)
2017 {
2018 struct g_raid_tr_class *class;
2019 struct g_raid_tr_object *obj;
2020 int status;
2021
2022 G_RAID_DEBUG1(2, vol->v_softc, "Starting volume %s.", vol->v_name);
2023 LIST_FOREACH(class, &g_raid_tr_classes, trc_list) {
2024 if (!class->trc_enable)
2025 continue;
2026 G_RAID_DEBUG1(2, vol->v_softc,
2027 "Tasting volume %s for %s transformation.",
2028 vol->v_name, class->name);
2029 obj = (void *)kobj_create((kobj_class_t)class, M_RAID,
2030 M_WAITOK);
2031 obj->tro_class = class;
2032 obj->tro_volume = vol;
2033 status = G_RAID_TR_TASTE(obj, vol);
2034 if (status != G_RAID_TR_TASTE_FAIL)
2035 break;
2036 kobj_delete((kobj_t)obj, M_RAID);
2037 }
2038 if (class == NULL) {
2039 G_RAID_DEBUG1(0, vol->v_softc,
2040 "No transformation module found for %s.",
2041 vol->v_name);
2042 vol->v_tr = NULL;
2043 g_raid_change_volume_state(vol, G_RAID_VOLUME_S_UNSUPPORTED);
2044 g_raid_event_send(vol, G_RAID_VOLUME_E_DOWN,
2045 G_RAID_EVENT_VOLUME);
2046 return (-1);
2047 }
2048 G_RAID_DEBUG1(2, vol->v_softc,
2049 "Transformation module %s chosen for %s.",
2050 class->name, vol->v_name);
2051 vol->v_tr = obj;
2052 return (0);
2053 }
2054
2055 int
2056 g_raid_destroy_node(struct g_raid_softc *sc, int worker)
2057 {
2058 struct g_raid_volume *vol, *tmpv;
2059 struct g_raid_disk *disk, *tmpd;
2060 int error = 0;
2061
2062 sc->sc_stopping = G_RAID_DESTROY_HARD;
2063 TAILQ_FOREACH_SAFE(vol, &sc->sc_volumes, v_next, tmpv) {
2064 if (g_raid_destroy_volume(vol))
2065 error = EBUSY;
2066 }
2067 if (error)
2068 return (error);
2069 TAILQ_FOREACH_SAFE(disk, &sc->sc_disks, d_next, tmpd) {
2070 if (g_raid_destroy_disk(disk))
2071 error = EBUSY;
2072 }
2073 if (error)
2074 return (error);
2075 if (sc->sc_md) {
2076 G_RAID_MD_FREE(sc->sc_md);
2077 kobj_delete((kobj_t)sc->sc_md, M_RAID);
2078 sc->sc_md = NULL;
2079 }
2080 if (sc->sc_geom != NULL) {
2081 G_RAID_DEBUG1(0, sc, "Array %s destroyed.", sc->sc_name);
2082 g_topology_lock();
2083 sc->sc_geom->softc = NULL;
2084 g_wither_geom(sc->sc_geom, ENXIO);
2085 g_topology_unlock();
2086 sc->sc_geom = NULL;
2087 } else
2088 G_RAID_DEBUG(1, "Array destroyed.");
2089 if (worker) {
2090 g_raid_event_cancel(sc, sc);
2091 mtx_destroy(&sc->sc_queue_mtx);
2092 sx_xunlock(&sc->sc_lock);
2093 sx_destroy(&sc->sc_lock);
2094 wakeup(&sc->sc_stopping);
2095 free(sc, M_RAID);
2096 curthread->td_pflags &= ~TDP_GEOM;
2097 G_RAID_DEBUG(1, "Thread exiting.");
2098 kproc_exit(0);
2099 } else {
2100 /* Wake up worker to make it selfdestruct. */
2101 g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0);
2102 }
2103 return (0);
2104 }
2105
2106 int
2107 g_raid_destroy_volume(struct g_raid_volume *vol)
2108 {
2109 struct g_raid_softc *sc;
2110 struct g_raid_disk *disk;
2111 int i;
2112
2113 sc = vol->v_softc;
2114 G_RAID_DEBUG1(2, sc, "Destroying volume %s.", vol->v_name);
2115 vol->v_stopping = 1;
2116 if (vol->v_state != G_RAID_VOLUME_S_STOPPED) {
2117 if (vol->v_tr) {
2118 G_RAID_TR_STOP(vol->v_tr);
2119 return (EBUSY);
2120 } else
2121 vol->v_state = G_RAID_VOLUME_S_STOPPED;
2122 }
2123 if (g_raid_event_check(sc, vol) != 0)
2124 return (EBUSY);
2125 if (vol->v_provider != NULL)
2126 return (EBUSY);
2127 if (vol->v_provider_open != 0)
2128 return (EBUSY);
2129 if (vol->v_tr) {
2130 G_RAID_TR_FREE(vol->v_tr);
2131 kobj_delete((kobj_t)vol->v_tr, M_RAID);
2132 vol->v_tr = NULL;
2133 }
2134 if (vol->v_rootmount)
2135 root_mount_rel(vol->v_rootmount);
2136 g_topology_lock();
2137 LIST_REMOVE(vol, v_global_next);
2138 g_topology_unlock();
2139 TAILQ_REMOVE(&sc->sc_volumes, vol, v_next);
2140 for (i = 0; i < G_RAID_MAX_SUBDISKS; i++) {
2141 g_raid_event_cancel(sc, &vol->v_subdisks[i]);
2142 disk = vol->v_subdisks[i].sd_disk;
2143 if (disk == NULL)
2144 continue;
2145 TAILQ_REMOVE(&disk->d_subdisks, &vol->v_subdisks[i], sd_next);
2146 }
2147 G_RAID_DEBUG1(2, sc, "Volume %s destroyed.", vol->v_name);
2148 if (sc->sc_md)
2149 G_RAID_MD_FREE_VOLUME(sc->sc_md, vol);
2150 g_raid_event_cancel(sc, vol);
2151 free(vol, M_RAID);
2152 if (sc->sc_stopping == G_RAID_DESTROY_HARD) {
2153 /* Wake up worker to let it selfdestruct. */
2154 g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0);
2155 }
2156 return (0);
2157 }
2158
2159 int
2160 g_raid_destroy_disk(struct g_raid_disk *disk)
2161 {
2162 struct g_raid_softc *sc;
2163 struct g_raid_subdisk *sd, *tmp;
2164
2165 sc = disk->d_softc;
2166 G_RAID_DEBUG1(2, sc, "Destroying disk.");
2167 if (disk->d_consumer) {
2168 g_raid_kill_consumer(sc, disk->d_consumer);
2169 disk->d_consumer = NULL;
2170 }
2171 TAILQ_FOREACH_SAFE(sd, &disk->d_subdisks, sd_next, tmp) {
2172 g_raid_change_subdisk_state(sd, G_RAID_SUBDISK_S_NONE);
2173 g_raid_event_send(sd, G_RAID_SUBDISK_E_DISCONNECTED,
2174 G_RAID_EVENT_SUBDISK);
2175 TAILQ_REMOVE(&disk->d_subdisks, sd, sd_next);
2176 sd->sd_disk = NULL;
2177 }
2178 TAILQ_REMOVE(&sc->sc_disks, disk, d_next);
2179 if (sc->sc_md)
2180 G_RAID_MD_FREE_DISK(sc->sc_md, disk);
2181 g_raid_event_cancel(sc, disk);
2182 free(disk, M_RAID);
2183 return (0);
2184 }
2185
2186 int
2187 g_raid_destroy(struct g_raid_softc *sc, int how)
2188 {
2189 int error, opens;
2190
2191 g_topology_assert_not();
2192 if (sc == NULL)
2193 return (ENXIO);
2194 sx_assert(&sc->sc_lock, SX_XLOCKED);
2195
2196 /* Count open volumes. */
2197 opens = g_raid_nopens(sc);
2198
2199 /* React on some opened volumes. */
2200 if (opens > 0) {
2201 switch (how) {
2202 case G_RAID_DESTROY_SOFT:
2203 G_RAID_DEBUG1(1, sc,
2204 "%d volumes are still open.",
2205 opens);
2206 sx_xunlock(&sc->sc_lock);
2207 return (EBUSY);
2208 case G_RAID_DESTROY_DELAYED:
2209 G_RAID_DEBUG1(1, sc,
2210 "Array will be destroyed on last close.");
2211 sc->sc_stopping = G_RAID_DESTROY_DELAYED;
2212 sx_xunlock(&sc->sc_lock);
2213 return (EBUSY);
2214 case G_RAID_DESTROY_HARD:
2215 G_RAID_DEBUG1(1, sc,
2216 "%d volumes are still open.",
2217 opens);
2218 }
2219 }
2220
2221 /* Mark node for destruction. */
2222 sc->sc_stopping = G_RAID_DESTROY_HARD;
2223 /* Wake up worker to let it selfdestruct. */
2224 g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0);
2225 /* Sleep until node destroyed. */
2226 error = sx_sleep(&sc->sc_stopping, &sc->sc_lock,
2227 PRIBIO | PDROP, "r:destroy", hz * 3);
2228 return (error == EWOULDBLOCK ? EBUSY : 0);
2229 }
2230
2231 static void
2232 g_raid_taste_orphan(struct g_consumer *cp)
2233 {
2234
2235 KASSERT(1 == 0, ("%s called while tasting %s.", __func__,
2236 cp->provider->name));
2237 }
2238
2239 static struct g_geom *
2240 g_raid_taste(struct g_class *mp, struct g_provider *pp, int flags __unused)
2241 {
2242 struct g_consumer *cp;
2243 struct g_geom *gp, *geom;
2244 struct g_raid_md_class *class;
2245 struct g_raid_md_object *obj;
2246 int status;
2247
2248 g_topology_assert();
2249 g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name);
2250 if (!g_raid_enable)
2251 return (NULL);
2252 G_RAID_DEBUG(2, "Tasting provider %s.", pp->name);
2253
2254 geom = NULL;
2255 status = G_RAID_MD_TASTE_FAIL;
2256 gp = g_new_geomf(mp, "raid:taste");
2257 /*
2258 * This orphan function should be never called.
2259 */
2260 gp->orphan = g_raid_taste_orphan;
2261 cp = g_new_consumer(gp);
2262 cp->flags |= G_CF_DIRECT_RECEIVE;
2263 g_attach(cp, pp);
2264 if (g_access(cp, 1, 0, 0) != 0)
2265 goto ofail;
2266
2267 LIST_FOREACH(class, &g_raid_md_classes, mdc_list) {
2268 if (!class->mdc_enable)
2269 continue;
2270 G_RAID_DEBUG(2, "Tasting provider %s for %s metadata.",
2271 pp->name, class->name);
2272 obj = (void *)kobj_create((kobj_class_t)class, M_RAID,
2273 M_WAITOK);
2274 obj->mdo_class = class;
2275 status = G_RAID_MD_TASTE(obj, mp, cp, &geom);
2276 if (status != G_RAID_MD_TASTE_NEW)
2277 kobj_delete((kobj_t)obj, M_RAID);
2278 if (status != G_RAID_MD_TASTE_FAIL)
2279 break;
2280 }
2281
2282 if (status == G_RAID_MD_TASTE_FAIL)
2283 (void)g_access(cp, -1, 0, 0);
2284 ofail:
2285 g_detach(cp);
2286 g_destroy_consumer(cp);
2287 g_destroy_geom(gp);
2288 G_RAID_DEBUG(2, "Tasting provider %s done.", pp->name);
2289 return (geom);
2290 }
2291
2292 int
2293 g_raid_create_node_format(const char *format, struct gctl_req *req,
2294 struct g_geom **gp)
2295 {
2296 struct g_raid_md_class *class;
2297 struct g_raid_md_object *obj;
2298 int status;
2299
2300 G_RAID_DEBUG(2, "Creating array for %s metadata.", format);
2301 LIST_FOREACH(class, &g_raid_md_classes, mdc_list) {
2302 if (strcasecmp(class->name, format) == 0)
2303 break;
2304 }
2305 if (class == NULL) {
2306 G_RAID_DEBUG(1, "No support for %s metadata.", format);
2307 return (G_RAID_MD_TASTE_FAIL);
2308 }
2309 obj = (void *)kobj_create((kobj_class_t)class, M_RAID,
2310 M_WAITOK);
2311 obj->mdo_class = class;
2312 status = G_RAID_MD_CREATE_REQ(obj, &g_raid_class, req, gp);
2313 if (status != G_RAID_MD_TASTE_NEW)
2314 kobj_delete((kobj_t)obj, M_RAID);
2315 return (status);
2316 }
2317
2318 static int
2319 g_raid_destroy_geom(struct gctl_req *req __unused,
2320 struct g_class *mp __unused, struct g_geom *gp)
2321 {
2322 struct g_raid_softc *sc;
2323 int error;
2324
2325 g_topology_unlock();
2326 sc = gp->softc;
2327 sx_xlock(&sc->sc_lock);
2328 g_cancel_event(sc);
2329 error = g_raid_destroy(gp->softc, G_RAID_DESTROY_SOFT);
2330 g_topology_lock();
2331 return (error);
2332 }
2333
2334 void g_raid_write_metadata(struct g_raid_softc *sc, struct g_raid_volume *vol,
2335 struct g_raid_subdisk *sd, struct g_raid_disk *disk)
2336 {
2337
2338 if (sc->sc_stopping == G_RAID_DESTROY_HARD)
2339 return;
2340 if (sc->sc_md)
2341 G_RAID_MD_WRITE(sc->sc_md, vol, sd, disk);
2342 }
2343
2344 void g_raid_fail_disk(struct g_raid_softc *sc,
2345 struct g_raid_subdisk *sd, struct g_raid_disk *disk)
2346 {
2347
2348 if (disk == NULL)
2349 disk = sd->sd_disk;
2350 if (disk == NULL) {
2351 G_RAID_DEBUG1(0, sc, "Warning! Fail request to an absent disk!");
2352 return;
2353 }
2354 if (disk->d_state != G_RAID_DISK_S_ACTIVE) {
2355 G_RAID_DEBUG1(0, sc, "Warning! Fail request to a disk in a "
2356 "wrong state (%s)!", g_raid_disk_state2str(disk->d_state));
2357 return;
2358 }
2359 if (sc->sc_md)
2360 G_RAID_MD_FAIL_DISK(sc->sc_md, sd, disk);
2361 }
2362
2363 static void
2364 g_raid_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp,
2365 struct g_consumer *cp, struct g_provider *pp)
2366 {
2367 struct g_raid_softc *sc;
2368 struct g_raid_volume *vol;
2369 struct g_raid_subdisk *sd;
2370 struct g_raid_disk *disk;
2371 int i, s;
2372
2373 g_topology_assert();
2374
2375 sc = gp->softc;
2376 if (sc == NULL)
2377 return;
2378 if (pp != NULL) {
2379 vol = pp->private;
2380 g_topology_unlock();
2381 sx_xlock(&sc->sc_lock);
2382 sbuf_printf(sb, "%s<descr>%s %s volume</descr>\n", indent,
2383 sc->sc_md->mdo_class->name,
2384 g_raid_volume_level2str(vol->v_raid_level,
2385 vol->v_raid_level_qualifier));
2386 sbuf_printf(sb, "%s<Label>%s</Label>\n", indent,
2387 vol->v_name);
2388 sbuf_printf(sb, "%s<RAIDLevel>%s</RAIDLevel>\n", indent,
2389 g_raid_volume_level2str(vol->v_raid_level,
2390 vol->v_raid_level_qualifier));
2391 sbuf_printf(sb,
2392 "%s<Transformation>%s</Transformation>\n", indent,
2393 vol->v_tr ? vol->v_tr->tro_class->name : "NONE");
2394 sbuf_printf(sb, "%s<Components>%u</Components>\n", indent,
2395 vol->v_disks_count);
2396 sbuf_printf(sb, "%s<Strip>%u</Strip>\n", indent,
2397 vol->v_strip_size);
2398 sbuf_printf(sb, "%s<State>%s</State>\n", indent,
2399 g_raid_volume_state2str(vol->v_state));
2400 sbuf_printf(sb, "%s<Dirty>%s</Dirty>\n", indent,
2401 vol->v_dirty ? "Yes" : "No");
2402 sbuf_printf(sb, "%s<Subdisks>", indent);
2403 for (i = 0; i < vol->v_disks_count; i++) {
2404 sd = &vol->v_subdisks[i];
2405 if (sd->sd_disk != NULL &&
2406 sd->sd_disk->d_consumer != NULL) {
2407 sbuf_printf(sb, "%s ",
2408 g_raid_get_diskname(sd->sd_disk));
2409 } else {
2410 sbuf_printf(sb, "NONE ");
2411 }
2412 sbuf_printf(sb, "(%s",
2413 g_raid_subdisk_state2str(sd->sd_state));
2414 if (sd->sd_state == G_RAID_SUBDISK_S_REBUILD ||
2415 sd->sd_state == G_RAID_SUBDISK_S_RESYNC) {
2416 sbuf_printf(sb, " %d%%",
2417 (int)(sd->sd_rebuild_pos * 100 /
2418 sd->sd_size));
2419 }
2420 sbuf_printf(sb, ")");
2421 if (i + 1 < vol->v_disks_count)
2422 sbuf_printf(sb, ", ");
2423 }
2424 sbuf_printf(sb, "</Subdisks>\n");
2425 sx_xunlock(&sc->sc_lock);
2426 g_topology_lock();
2427 } else if (cp != NULL) {
2428 disk = cp->private;
2429 if (disk == NULL)
2430 return;
2431 g_topology_unlock();
2432 sx_xlock(&sc->sc_lock);
2433 sbuf_printf(sb, "%s<State>%s", indent,
2434 g_raid_disk_state2str(disk->d_state));
2435 if (!TAILQ_EMPTY(&disk->d_subdisks)) {
2436 sbuf_printf(sb, " (");
2437 TAILQ_FOREACH(sd, &disk->d_subdisks, sd_next) {
2438 sbuf_printf(sb, "%s",
2439 g_raid_subdisk_state2str(sd->sd_state));
2440 if (sd->sd_state == G_RAID_SUBDISK_S_REBUILD ||
2441 sd->sd_state == G_RAID_SUBDISK_S_RESYNC) {
2442 sbuf_printf(sb, " %d%%",
2443 (int)(sd->sd_rebuild_pos * 100 /
2444 sd->sd_size));
2445 }
2446 if (TAILQ_NEXT(sd, sd_next))
2447 sbuf_printf(sb, ", ");
2448 }
2449 sbuf_printf(sb, ")");
2450 }
2451 sbuf_printf(sb, "</State>\n");
2452 sbuf_printf(sb, "%s<Subdisks>", indent);
2453 TAILQ_FOREACH(sd, &disk->d_subdisks, sd_next) {
2454 sbuf_printf(sb, "r%d(%s):%d@%ju",
2455 sd->sd_volume->v_global_id,
2456 sd->sd_volume->v_name,
2457 sd->sd_pos, sd->sd_offset);
2458 if (TAILQ_NEXT(sd, sd_next))
2459 sbuf_printf(sb, ", ");
2460 }
2461 sbuf_printf(sb, "</Subdisks>\n");
2462 sbuf_printf(sb, "%s<ReadErrors>%d</ReadErrors>\n", indent,
2463 disk->d_read_errs);
2464 sx_xunlock(&sc->sc_lock);
2465 g_topology_lock();
2466 } else {
2467 g_topology_unlock();
2468 sx_xlock(&sc->sc_lock);
2469 if (sc->sc_md) {
2470 sbuf_printf(sb, "%s<Metadata>%s</Metadata>\n", indent,
2471 sc->sc_md->mdo_class->name);
2472 }
2473 if (!TAILQ_EMPTY(&sc->sc_volumes)) {
2474 s = 0xff;
2475 TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) {
2476 if (vol->v_state < s)
2477 s = vol->v_state;
2478 }
2479 sbuf_printf(sb, "%s<State>%s</State>\n", indent,
2480 g_raid_volume_state2str(s));
2481 }
2482 sx_xunlock(&sc->sc_lock);
2483 g_topology_lock();
2484 }
2485 }
2486
2487 static void
2488 g_raid_shutdown_post_sync(void *arg, int howto)
2489 {
2490 struct g_class *mp;
2491 struct g_geom *gp, *gp2;
2492 struct g_raid_softc *sc;
2493 struct g_raid_volume *vol;
2494
2495 mp = arg;
2496 DROP_GIANT();
2497 g_topology_lock();
2498 g_raid_shutdown = 1;
2499 LIST_FOREACH_SAFE(gp, &mp->geom, geom, gp2) {
2500 if ((sc = gp->softc) == NULL)
2501 continue;
2502 g_topology_unlock();
2503 sx_xlock(&sc->sc_lock);
2504 TAILQ_FOREACH(vol, &sc->sc_volumes, v_next)
2505 g_raid_clean(vol, -1);
2506 g_cancel_event(sc);
2507 g_raid_destroy(sc, G_RAID_DESTROY_DELAYED);
2508 g_topology_lock();
2509 }
2510 g_topology_unlock();
2511 PICKUP_GIANT();
2512 }
2513
2514 static void
2515 g_raid_init(struct g_class *mp)
2516 {
2517
2518 g_raid_post_sync = EVENTHANDLER_REGISTER(shutdown_post_sync,
2519 g_raid_shutdown_post_sync, mp, SHUTDOWN_PRI_FIRST);
2520 if (g_raid_post_sync == NULL)
2521 G_RAID_DEBUG(0, "Warning! Cannot register shutdown event.");
2522 g_raid_started = 1;
2523 }
2524
2525 static void
2526 g_raid_fini(struct g_class *mp)
2527 {
2528
2529 if (g_raid_post_sync != NULL)
2530 EVENTHANDLER_DEREGISTER(shutdown_post_sync, g_raid_post_sync);
2531 g_raid_started = 0;
2532 }
2533
2534 int
2535 g_raid_md_modevent(module_t mod, int type, void *arg)
2536 {
2537 struct g_raid_md_class *class, *c, *nc;
2538 int error;
2539
2540 error = 0;
2541 class = arg;
2542 switch (type) {
2543 case MOD_LOAD:
2544 c = LIST_FIRST(&g_raid_md_classes);
2545 if (c == NULL || c->mdc_priority > class->mdc_priority)
2546 LIST_INSERT_HEAD(&g_raid_md_classes, class, mdc_list);
2547 else {
2548 while ((nc = LIST_NEXT(c, mdc_list)) != NULL &&
2549 nc->mdc_priority < class->mdc_priority)
2550 c = nc;
2551 LIST_INSERT_AFTER(c, class, mdc_list);
2552 }
2553 if (g_raid_started)
2554 g_retaste(&g_raid_class);
2555 break;
2556 case MOD_UNLOAD:
2557 LIST_REMOVE(class, mdc_list);
2558 break;
2559 default:
2560 error = EOPNOTSUPP;
2561 break;
2562 }
2563
2564 return (error);
2565 }
2566
2567 int
2568 g_raid_tr_modevent(module_t mod, int type, void *arg)
2569 {
2570 struct g_raid_tr_class *class, *c, *nc;
2571 int error;
2572
2573 error = 0;
2574 class = arg;
2575 switch (type) {
2576 case MOD_LOAD:
2577 c = LIST_FIRST(&g_raid_tr_classes);
2578 if (c == NULL || c->trc_priority > class->trc_priority)
2579 LIST_INSERT_HEAD(&g_raid_tr_classes, class, trc_list);
2580 else {
2581 while ((nc = LIST_NEXT(c, trc_list)) != NULL &&
2582 nc->trc_priority < class->trc_priority)
2583 c = nc;
2584 LIST_INSERT_AFTER(c, class, trc_list);
2585 }
2586 break;
2587 case MOD_UNLOAD:
2588 LIST_REMOVE(class, trc_list);
2589 break;
2590 default:
2591 error = EOPNOTSUPP;
2592 break;
2593 }
2594
2595 return (error);
2596 }
2597
2598 /*
2599 * Use local implementation of DECLARE_GEOM_CLASS(g_raid_class, g_raid)
2600 * to reduce module priority, allowing submodules to register them first.
2601 */
2602 static moduledata_t g_raid_mod = {
2603 "g_raid",
2604 g_modevent,
2605 &g_raid_class
2606 };
2607 DECLARE_MODULE(g_raid, g_raid_mod, SI_SUB_DRIVERS, SI_ORDER_THIRD);
2608 MODULE_VERSION(geom_raid, 0);
Cache object: a6227017a85482035dcc940b4144a246
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