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/param.h>
30 #include <sys/bio.h>
31 #include <sys/endian.h>
32 #include <sys/kernel.h>
33 #include <sys/kobj.h>
34 #include <sys/lock.h>
35 #include <sys/malloc.h>
36 #include <sys/mutex.h>
37 #include <sys/systm.h>
38 #include <geom/geom.h>
39 #include <geom/geom_dbg.h>
40 #include "geom/raid/g_raid.h"
41 #include "g_raid_tr_if.h"
42
43 static MALLOC_DEFINE(M_TR_CONCAT, "tr_concat_data", "GEOM_RAID CONCAT data");
44
45 struct g_raid_tr_concat_object {
46 struct g_raid_tr_object trso_base;
47 int trso_starting;
48 int trso_stopped;
49 };
50
51 static g_raid_tr_taste_t g_raid_tr_taste_concat;
52 static g_raid_tr_event_t g_raid_tr_event_concat;
53 static g_raid_tr_start_t g_raid_tr_start_concat;
54 static g_raid_tr_stop_t g_raid_tr_stop_concat;
55 static g_raid_tr_iostart_t g_raid_tr_iostart_concat;
56 static g_raid_tr_iodone_t g_raid_tr_iodone_concat;
57 static g_raid_tr_kerneldump_t g_raid_tr_kerneldump_concat;
58 static g_raid_tr_free_t g_raid_tr_free_concat;
59
60 static kobj_method_t g_raid_tr_concat_methods[] = {
61 KOBJMETHOD(g_raid_tr_taste, g_raid_tr_taste_concat),
62 KOBJMETHOD(g_raid_tr_event, g_raid_tr_event_concat),
63 KOBJMETHOD(g_raid_tr_start, g_raid_tr_start_concat),
64 KOBJMETHOD(g_raid_tr_stop, g_raid_tr_stop_concat),
65 KOBJMETHOD(g_raid_tr_iostart, g_raid_tr_iostart_concat),
66 KOBJMETHOD(g_raid_tr_iodone, g_raid_tr_iodone_concat),
67 KOBJMETHOD(g_raid_tr_kerneldump, g_raid_tr_kerneldump_concat),
68 KOBJMETHOD(g_raid_tr_free, g_raid_tr_free_concat),
69 { 0, 0 }
70 };
71
72 static struct g_raid_tr_class g_raid_tr_concat_class = {
73 "CONCAT",
74 g_raid_tr_concat_methods,
75 sizeof(struct g_raid_tr_concat_object),
76 .trc_enable = 1,
77 .trc_priority = 50,
78 .trc_accept_unmapped = 1
79 };
80
81 static int
g_raid_tr_taste_concat(struct g_raid_tr_object * tr,struct g_raid_volume * volume)82 g_raid_tr_taste_concat(struct g_raid_tr_object *tr, struct g_raid_volume *volume)
83 {
84 struct g_raid_tr_concat_object *trs;
85
86 trs = (struct g_raid_tr_concat_object *)tr;
87 if (tr->tro_volume->v_raid_level != G_RAID_VOLUME_RL_SINGLE &&
88 tr->tro_volume->v_raid_level != G_RAID_VOLUME_RL_CONCAT &&
89 !(tr->tro_volume->v_disks_count == 1 &&
90 tr->tro_volume->v_raid_level != G_RAID_VOLUME_RL_UNKNOWN))
91 return (G_RAID_TR_TASTE_FAIL);
92 trs->trso_starting = 1;
93 return (G_RAID_TR_TASTE_SUCCEED);
94 }
95
96 static int
g_raid_tr_update_state_concat(struct g_raid_volume * vol)97 g_raid_tr_update_state_concat(struct g_raid_volume *vol)
98 {
99 struct g_raid_tr_concat_object *trs;
100 struct g_raid_softc *sc;
101 off_t size;
102 u_int s;
103 int i, n, f;
104
105 sc = vol->v_softc;
106 trs = (struct g_raid_tr_concat_object *)vol->v_tr;
107 if (trs->trso_stopped)
108 s = G_RAID_VOLUME_S_STOPPED;
109 else if (trs->trso_starting)
110 s = G_RAID_VOLUME_S_STARTING;
111 else {
112 n = g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_ACTIVE);
113 f = g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_FAILED);
114 if (n + f == vol->v_disks_count) {
115 if (f == 0)
116 s = G_RAID_VOLUME_S_OPTIMAL;
117 else
118 s = G_RAID_VOLUME_S_SUBOPTIMAL;
119 } else
120 s = G_RAID_VOLUME_S_BROKEN;
121 }
122 if (s != vol->v_state) {
123 /*
124 * Some metadata modules may not know CONCAT volume
125 * mediasize until all disks connected. Recalculate.
126 */
127 if (vol->v_raid_level == G_RAID_VOLUME_RL_CONCAT &&
128 G_RAID_VOLUME_S_ALIVE(s) &&
129 !G_RAID_VOLUME_S_ALIVE(vol->v_state)) {
130 size = 0;
131 for (i = 0; i < vol->v_disks_count; i++) {
132 if (vol->v_subdisks[i].sd_state !=
133 G_RAID_SUBDISK_S_NONE)
134 size += vol->v_subdisks[i].sd_size;
135 }
136 vol->v_mediasize = size;
137 }
138
139 g_raid_event_send(vol, G_RAID_VOLUME_S_ALIVE(s) ?
140 G_RAID_VOLUME_E_UP : G_RAID_VOLUME_E_DOWN,
141 G_RAID_EVENT_VOLUME);
142 g_raid_change_volume_state(vol, s);
143 if (!trs->trso_starting && !trs->trso_stopped)
144 g_raid_write_metadata(sc, vol, NULL, NULL);
145 }
146 return (0);
147 }
148
149 static int
g_raid_tr_event_concat(struct g_raid_tr_object * tr,struct g_raid_subdisk * sd,u_int event)150 g_raid_tr_event_concat(struct g_raid_tr_object *tr,
151 struct g_raid_subdisk *sd, u_int event)
152 {
153 struct g_raid_tr_concat_object *trs;
154 struct g_raid_softc *sc;
155 struct g_raid_volume *vol;
156 int state;
157
158 trs = (struct g_raid_tr_concat_object *)tr;
159 vol = tr->tro_volume;
160 sc = vol->v_softc;
161
162 state = sd->sd_state;
163 if (state != G_RAID_SUBDISK_S_NONE &&
164 state != G_RAID_SUBDISK_S_FAILED &&
165 state != G_RAID_SUBDISK_S_ACTIVE) {
166 G_RAID_DEBUG1(1, sc,
167 "Promote subdisk %s:%d from %s to ACTIVE.",
168 vol->v_name, sd->sd_pos,
169 g_raid_subdisk_state2str(sd->sd_state));
170 g_raid_change_subdisk_state(sd, G_RAID_SUBDISK_S_ACTIVE);
171 }
172 if (state != sd->sd_state &&
173 !trs->trso_starting && !trs->trso_stopped)
174 g_raid_write_metadata(sc, vol, sd, NULL);
175 g_raid_tr_update_state_concat(vol);
176 return (0);
177 }
178
179 static int
g_raid_tr_start_concat(struct g_raid_tr_object * tr)180 g_raid_tr_start_concat(struct g_raid_tr_object *tr)
181 {
182 struct g_raid_tr_concat_object *trs;
183 struct g_raid_volume *vol;
184
185 trs = (struct g_raid_tr_concat_object *)tr;
186 vol = tr->tro_volume;
187 trs->trso_starting = 0;
188 g_raid_tr_update_state_concat(vol);
189 return (0);
190 }
191
192 static int
g_raid_tr_stop_concat(struct g_raid_tr_object * tr)193 g_raid_tr_stop_concat(struct g_raid_tr_object *tr)
194 {
195 struct g_raid_tr_concat_object *trs;
196 struct g_raid_volume *vol;
197
198 trs = (struct g_raid_tr_concat_object *)tr;
199 vol = tr->tro_volume;
200 trs->trso_starting = 0;
201 trs->trso_stopped = 1;
202 g_raid_tr_update_state_concat(vol);
203 return (0);
204 }
205
206 static void
g_raid_tr_iostart_concat(struct g_raid_tr_object * tr,struct bio * bp)207 g_raid_tr_iostart_concat(struct g_raid_tr_object *tr, struct bio *bp)
208 {
209 struct g_raid_volume *vol;
210 struct g_raid_subdisk *sd;
211 struct bio_queue_head queue;
212 struct bio *cbp;
213 char *addr;
214 off_t offset, length, remain;
215 u_int no;
216
217 vol = tr->tro_volume;
218 if (vol->v_state != G_RAID_VOLUME_S_OPTIMAL &&
219 vol->v_state != G_RAID_VOLUME_S_SUBOPTIMAL) {
220 g_raid_iodone(bp, EIO);
221 return;
222 }
223 if (bp->bio_cmd == BIO_FLUSH || bp->bio_cmd == BIO_SPEEDUP) {
224 g_raid_tr_flush_common(tr, bp);
225 return;
226 }
227
228 offset = bp->bio_offset;
229 remain = bp->bio_length;
230 if ((bp->bio_flags & BIO_UNMAPPED) != 0)
231 addr = NULL;
232 else
233 addr = bp->bio_data;
234 no = 0;
235 while (no < vol->v_disks_count &&
236 offset >= vol->v_subdisks[no].sd_size) {
237 offset -= vol->v_subdisks[no].sd_size;
238 no++;
239 }
240 if (no >= vol->v_disks_count) {
241 g_raid_iodone(bp, EIO);
242 return;
243 }
244 bioq_init(&queue);
245 do {
246 sd = &vol->v_subdisks[no];
247 length = MIN(sd->sd_size - offset, remain);
248 cbp = g_clone_bio(bp);
249 if (cbp == NULL)
250 goto failure;
251 cbp->bio_offset = offset;
252 cbp->bio_length = length;
253 if ((bp->bio_flags & BIO_UNMAPPED) != 0 &&
254 bp->bio_cmd != BIO_DELETE) {
255 cbp->bio_ma_offset += (uintptr_t)addr;
256 cbp->bio_ma += cbp->bio_ma_offset / PAGE_SIZE;
257 cbp->bio_ma_offset %= PAGE_SIZE;
258 cbp->bio_ma_n = round_page(cbp->bio_ma_offset +
259 cbp->bio_length) / PAGE_SIZE;
260 } else
261 cbp->bio_data = addr;
262 cbp->bio_caller1 = sd;
263 bioq_insert_tail(&queue, cbp);
264 remain -= length;
265 if (bp->bio_cmd != BIO_DELETE)
266 addr += length;
267 offset = 0;
268 no++;
269 } while (remain > 0 && no < vol->v_disks_count);
270 bp->bio_completed = bp->bio_length - remain;
271 while ((cbp = bioq_takefirst(&queue)) != NULL) {
272 sd = cbp->bio_caller1;
273 cbp->bio_caller1 = NULL;
274 g_raid_subdisk_iostart(sd, cbp);
275 }
276 return;
277 failure:
278 while ((cbp = bioq_takefirst(&queue)) != NULL)
279 g_destroy_bio(cbp);
280 if (bp->bio_error == 0)
281 bp->bio_error = ENOMEM;
282 g_raid_iodone(bp, bp->bio_error);
283 }
284
285 static int
g_raid_tr_kerneldump_concat(struct g_raid_tr_object * tr,void * virtual,off_t boffset,size_t blength)286 g_raid_tr_kerneldump_concat(struct g_raid_tr_object *tr, void *virtual,
287 off_t boffset, size_t blength)
288 {
289 struct g_raid_volume *vol;
290 struct g_raid_subdisk *sd;
291 char *addr;
292 off_t offset, length, remain;
293 int error, no;
294
295 vol = tr->tro_volume;
296 if (vol->v_state != G_RAID_VOLUME_S_OPTIMAL)
297 return (ENXIO);
298
299 offset = boffset;
300 remain = blength;
301 addr = virtual;
302 no = 0;
303 while (no < vol->v_disks_count &&
304 offset >= vol->v_subdisks[no].sd_size) {
305 offset -= vol->v_subdisks[no].sd_size;
306 no++;
307 }
308 if (no >= vol->v_disks_count)
309 return (EIO);
310 do {
311 sd = &vol->v_subdisks[no];
312 length = MIN(sd->sd_size - offset, remain);
313 error = g_raid_subdisk_kerneldump(&vol->v_subdisks[no],
314 addr, offset, length);
315 if (error != 0)
316 return (error);
317 remain -= length;
318 addr += length;
319 offset = 0;
320 no++;
321 } while (remain > 0 && no < vol->v_disks_count);
322 if (remain > 0)
323 return (EIO);
324 return (0);
325 }
326
327 static void
g_raid_tr_iodone_concat(struct g_raid_tr_object * tr,struct g_raid_subdisk * sd,struct bio * bp)328 g_raid_tr_iodone_concat(struct g_raid_tr_object *tr,
329 struct g_raid_subdisk *sd,struct bio *bp)
330 {
331 struct bio *pbp;
332
333 pbp = bp->bio_parent;
334 if (pbp->bio_error == 0)
335 pbp->bio_error = bp->bio_error;
336 g_destroy_bio(bp);
337 pbp->bio_inbed++;
338 if (pbp->bio_children == pbp->bio_inbed) {
339 g_raid_iodone(pbp, pbp->bio_error);
340 }
341 }
342
343 static int
g_raid_tr_free_concat(struct g_raid_tr_object * tr)344 g_raid_tr_free_concat(struct g_raid_tr_object *tr)
345 {
346
347 return (0);
348 }
349
350 G_RAID_TR_DECLARE(concat, "CONCAT");
351