1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2010 Alexander Motin <mav@FreeBSD.org>
5 * All rights reserved.
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 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 #include <sys/param.h>
31 #include <sys/bio.h>
32 #include <sys/endian.h>
33 #include <sys/kernel.h>
34 #include <sys/kobj.h>
35 #include <sys/lock.h>
36 #include <sys/malloc.h>
37 #include <sys/mutex.h>
38 #include <sys/systm.h>
39 #include <geom/geom.h>
40 #include <geom/geom_dbg.h>
41 #include "geom/raid/g_raid.h"
42 #include "g_raid_tr_if.h"
43
44 static MALLOC_DEFINE(M_TR_CONCAT, "tr_concat_data", "GEOM_RAID CONCAT data");
45
46 struct g_raid_tr_concat_object {
47 struct g_raid_tr_object trso_base;
48 int trso_starting;
49 int trso_stopped;
50 };
51
52 static g_raid_tr_taste_t g_raid_tr_taste_concat;
53 static g_raid_tr_event_t g_raid_tr_event_concat;
54 static g_raid_tr_start_t g_raid_tr_start_concat;
55 static g_raid_tr_stop_t g_raid_tr_stop_concat;
56 static g_raid_tr_iostart_t g_raid_tr_iostart_concat;
57 static g_raid_tr_iodone_t g_raid_tr_iodone_concat;
58 static g_raid_tr_kerneldump_t g_raid_tr_kerneldump_concat;
59 static g_raid_tr_free_t g_raid_tr_free_concat;
60
61 static kobj_method_t g_raid_tr_concat_methods[] = {
62 KOBJMETHOD(g_raid_tr_taste, g_raid_tr_taste_concat),
63 KOBJMETHOD(g_raid_tr_event, g_raid_tr_event_concat),
64 KOBJMETHOD(g_raid_tr_start, g_raid_tr_start_concat),
65 KOBJMETHOD(g_raid_tr_stop, g_raid_tr_stop_concat),
66 KOBJMETHOD(g_raid_tr_iostart, g_raid_tr_iostart_concat),
67 KOBJMETHOD(g_raid_tr_iodone, g_raid_tr_iodone_concat),
68 KOBJMETHOD(g_raid_tr_kerneldump, g_raid_tr_kerneldump_concat),
69 KOBJMETHOD(g_raid_tr_free, g_raid_tr_free_concat),
70 { 0, 0 }
71 };
72
73 static struct g_raid_tr_class g_raid_tr_concat_class = {
74 "CONCAT",
75 g_raid_tr_concat_methods,
76 sizeof(struct g_raid_tr_concat_object),
77 .trc_enable = 1,
78 .trc_priority = 50,
79 .trc_accept_unmapped = 1
80 };
81
82 static int
g_raid_tr_taste_concat(struct g_raid_tr_object * tr,struct g_raid_volume * volume)83 g_raid_tr_taste_concat(struct g_raid_tr_object *tr, struct g_raid_volume *volume)
84 {
85 struct g_raid_tr_concat_object *trs;
86
87 trs = (struct g_raid_tr_concat_object *)tr;
88 if (tr->tro_volume->v_raid_level != G_RAID_VOLUME_RL_SINGLE &&
89 tr->tro_volume->v_raid_level != G_RAID_VOLUME_RL_CONCAT &&
90 !(tr->tro_volume->v_disks_count == 1 &&
91 tr->tro_volume->v_raid_level != G_RAID_VOLUME_RL_UNKNOWN))
92 return (G_RAID_TR_TASTE_FAIL);
93 trs->trso_starting = 1;
94 return (G_RAID_TR_TASTE_SUCCEED);
95 }
96
97 static int
g_raid_tr_update_state_concat(struct g_raid_volume * vol)98 g_raid_tr_update_state_concat(struct g_raid_volume *vol)
99 {
100 struct g_raid_tr_concat_object *trs;
101 struct g_raid_softc *sc;
102 off_t size;
103 u_int s;
104 int i, n, f;
105
106 sc = vol->v_softc;
107 trs = (struct g_raid_tr_concat_object *)vol->v_tr;
108 if (trs->trso_stopped)
109 s = G_RAID_VOLUME_S_STOPPED;
110 else if (trs->trso_starting)
111 s = G_RAID_VOLUME_S_STARTING;
112 else {
113 n = g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_ACTIVE);
114 f = g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_FAILED);
115 if (n + f == vol->v_disks_count) {
116 if (f == 0)
117 s = G_RAID_VOLUME_S_OPTIMAL;
118 else
119 s = G_RAID_VOLUME_S_SUBOPTIMAL;
120 } else
121 s = G_RAID_VOLUME_S_BROKEN;
122 }
123 if (s != vol->v_state) {
124 /*
125 * Some metadata modules may not know CONCAT volume
126 * mediasize until all disks connected. Recalculate.
127 */
128 if (vol->v_raid_level == G_RAID_VOLUME_RL_CONCAT &&
129 G_RAID_VOLUME_S_ALIVE(s) &&
130 !G_RAID_VOLUME_S_ALIVE(vol->v_state)) {
131 size = 0;
132 for (i = 0; i < vol->v_disks_count; i++) {
133 if (vol->v_subdisks[i].sd_state !=
134 G_RAID_SUBDISK_S_NONE)
135 size += vol->v_subdisks[i].sd_size;
136 }
137 vol->v_mediasize = size;
138 }
139
140 g_raid_event_send(vol, G_RAID_VOLUME_S_ALIVE(s) ?
141 G_RAID_VOLUME_E_UP : G_RAID_VOLUME_E_DOWN,
142 G_RAID_EVENT_VOLUME);
143 g_raid_change_volume_state(vol, s);
144 if (!trs->trso_starting && !trs->trso_stopped)
145 g_raid_write_metadata(sc, vol, NULL, NULL);
146 }
147 return (0);
148 }
149
150 static int
g_raid_tr_event_concat(struct g_raid_tr_object * tr,struct g_raid_subdisk * sd,u_int event)151 g_raid_tr_event_concat(struct g_raid_tr_object *tr,
152 struct g_raid_subdisk *sd, u_int event)
153 {
154 struct g_raid_tr_concat_object *trs;
155 struct g_raid_softc *sc;
156 struct g_raid_volume *vol;
157 int state;
158
159 trs = (struct g_raid_tr_concat_object *)tr;
160 vol = tr->tro_volume;
161 sc = vol->v_softc;
162
163 state = sd->sd_state;
164 if (state != G_RAID_SUBDISK_S_NONE &&
165 state != G_RAID_SUBDISK_S_FAILED &&
166 state != G_RAID_SUBDISK_S_ACTIVE) {
167 G_RAID_DEBUG1(1, sc,
168 "Promote subdisk %s:%d from %s to ACTIVE.",
169 vol->v_name, sd->sd_pos,
170 g_raid_subdisk_state2str(sd->sd_state));
171 g_raid_change_subdisk_state(sd, G_RAID_SUBDISK_S_ACTIVE);
172 }
173 if (state != sd->sd_state &&
174 !trs->trso_starting && !trs->trso_stopped)
175 g_raid_write_metadata(sc, vol, sd, NULL);
176 g_raid_tr_update_state_concat(vol);
177 return (0);
178 }
179
180 static int
g_raid_tr_start_concat(struct g_raid_tr_object * tr)181 g_raid_tr_start_concat(struct g_raid_tr_object *tr)
182 {
183 struct g_raid_tr_concat_object *trs;
184 struct g_raid_volume *vol;
185
186 trs = (struct g_raid_tr_concat_object *)tr;
187 vol = tr->tro_volume;
188 trs->trso_starting = 0;
189 g_raid_tr_update_state_concat(vol);
190 return (0);
191 }
192
193 static int
g_raid_tr_stop_concat(struct g_raid_tr_object * tr)194 g_raid_tr_stop_concat(struct g_raid_tr_object *tr)
195 {
196 struct g_raid_tr_concat_object *trs;
197 struct g_raid_volume *vol;
198
199 trs = (struct g_raid_tr_concat_object *)tr;
200 vol = tr->tro_volume;
201 trs->trso_starting = 0;
202 trs->trso_stopped = 1;
203 g_raid_tr_update_state_concat(vol);
204 return (0);
205 }
206
207 static void
g_raid_tr_iostart_concat(struct g_raid_tr_object * tr,struct bio * bp)208 g_raid_tr_iostart_concat(struct g_raid_tr_object *tr, struct bio *bp)
209 {
210 struct g_raid_volume *vol;
211 struct g_raid_subdisk *sd;
212 struct bio_queue_head queue;
213 struct bio *cbp;
214 char *addr;
215 off_t offset, length, remain;
216 u_int no;
217
218 vol = tr->tro_volume;
219 if (vol->v_state != G_RAID_VOLUME_S_OPTIMAL &&
220 vol->v_state != G_RAID_VOLUME_S_SUBOPTIMAL) {
221 g_raid_iodone(bp, EIO);
222 return;
223 }
224 if (bp->bio_cmd == BIO_FLUSH || bp->bio_cmd == BIO_SPEEDUP) {
225 g_raid_tr_flush_common(tr, bp);
226 return;
227 }
228
229 offset = bp->bio_offset;
230 remain = bp->bio_length;
231 if ((bp->bio_flags & BIO_UNMAPPED) != 0)
232 addr = NULL;
233 else
234 addr = bp->bio_data;
235 no = 0;
236 while (no < vol->v_disks_count &&
237 offset >= vol->v_subdisks[no].sd_size) {
238 offset -= vol->v_subdisks[no].sd_size;
239 no++;
240 }
241 if (no >= vol->v_disks_count) {
242 g_raid_iodone(bp, EIO);
243 return;
244 }
245 bioq_init(&queue);
246 do {
247 sd = &vol->v_subdisks[no];
248 length = MIN(sd->sd_size - offset, remain);
249 cbp = g_clone_bio(bp);
250 if (cbp == NULL)
251 goto failure;
252 cbp->bio_offset = offset;
253 cbp->bio_length = length;
254 if ((bp->bio_flags & BIO_UNMAPPED) != 0 &&
255 bp->bio_cmd != BIO_DELETE) {
256 cbp->bio_ma_offset += (uintptr_t)addr;
257 cbp->bio_ma += cbp->bio_ma_offset / PAGE_SIZE;
258 cbp->bio_ma_offset %= PAGE_SIZE;
259 cbp->bio_ma_n = round_page(cbp->bio_ma_offset +
260 cbp->bio_length) / PAGE_SIZE;
261 } else
262 cbp->bio_data = addr;
263 cbp->bio_caller1 = sd;
264 bioq_insert_tail(&queue, cbp);
265 remain -= length;
266 if (bp->bio_cmd != BIO_DELETE)
267 addr += length;
268 offset = 0;
269 no++;
270 } while (remain > 0 && no < vol->v_disks_count);
271 bp->bio_completed = bp->bio_length - remain;
272 while ((cbp = bioq_takefirst(&queue)) != NULL) {
273 sd = cbp->bio_caller1;
274 cbp->bio_caller1 = NULL;
275 g_raid_subdisk_iostart(sd, cbp);
276 }
277 return;
278 failure:
279 while ((cbp = bioq_takefirst(&queue)) != NULL)
280 g_destroy_bio(cbp);
281 if (bp->bio_error == 0)
282 bp->bio_error = ENOMEM;
283 g_raid_iodone(bp, bp->bio_error);
284 }
285
286 static int
g_raid_tr_kerneldump_concat(struct g_raid_tr_object * tr,void * virtual,off_t boffset,size_t blength)287 g_raid_tr_kerneldump_concat(struct g_raid_tr_object *tr, void *virtual,
288 off_t boffset, size_t blength)
289 {
290 struct g_raid_volume *vol;
291 struct g_raid_subdisk *sd;
292 char *addr;
293 off_t offset, length, remain;
294 int error, no;
295
296 vol = tr->tro_volume;
297 if (vol->v_state != G_RAID_VOLUME_S_OPTIMAL)
298 return (ENXIO);
299
300 offset = boffset;
301 remain = blength;
302 addr = virtual;
303 no = 0;
304 while (no < vol->v_disks_count &&
305 offset >= vol->v_subdisks[no].sd_size) {
306 offset -= vol->v_subdisks[no].sd_size;
307 no++;
308 }
309 if (no >= vol->v_disks_count)
310 return (EIO);
311 do {
312 sd = &vol->v_subdisks[no];
313 length = MIN(sd->sd_size - offset, remain);
314 error = g_raid_subdisk_kerneldump(&vol->v_subdisks[no],
315 addr, offset, length);
316 if (error != 0)
317 return (error);
318 remain -= length;
319 addr += length;
320 offset = 0;
321 no++;
322 } while (remain > 0 && no < vol->v_disks_count);
323 if (remain > 0)
324 return (EIO);
325 return (0);
326 }
327
328 static void
g_raid_tr_iodone_concat(struct g_raid_tr_object * tr,struct g_raid_subdisk * sd,struct bio * bp)329 g_raid_tr_iodone_concat(struct g_raid_tr_object *tr,
330 struct g_raid_subdisk *sd,struct bio *bp)
331 {
332 struct bio *pbp;
333
334 pbp = bp->bio_parent;
335 if (pbp->bio_error == 0)
336 pbp->bio_error = bp->bio_error;
337 g_destroy_bio(bp);
338 pbp->bio_inbed++;
339 if (pbp->bio_children == pbp->bio_inbed) {
340 g_raid_iodone(pbp, pbp->bio_error);
341 }
342 }
343
344 static int
g_raid_tr_free_concat(struct g_raid_tr_object * tr)345 g_raid_tr_free_concat(struct g_raid_tr_object *tr)
346 {
347
348 return (0);
349 }
350
351 G_RAID_TR_DECLARE(concat, "CONCAT");
352