source: mainline/uspace/srv/bd/hr/raid1.c@ d092d2c

Last change on this file since d092d2c was 13ce552, checked in by Miroslav Cimerman <mc@…>, 11 months ago

hr: add DEGRADED volume state

Use it for weakened mirror as well.
  • Property mode set to 100644
File size: 7.6 KB
Line 
1/*
2 * Copyright (c) 2024 Miroslav Cimerman
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 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup hr
30 * @{
31 */
32/**
33 * @file
34 */
35
36#include <bd_srv.h>
37#include <block.h>
38#include <errno.h>
39#include <hr.h>
40#include <io/log.h>
41#include <ipc/hr.h>
42#include <ipc/services.h>
43#include <loc.h>
44#include <task.h>
45#include <stdio.h>
46#include <stdlib.h>
47#include <str_error.h>
48
49#include "superblock.h"
50#include "util.h"
51#include "var.h"
52
53extern loc_srv_t *hr_srv;
54
55static errno_t hr_raid1_bd_open(bd_srvs_t *, bd_srv_t *);
56static errno_t hr_raid1_bd_close(bd_srv_t *);
57static errno_t hr_raid1_bd_read_blocks(bd_srv_t *, aoff64_t, size_t, void *,
58 size_t);
59static errno_t hr_raid1_bd_sync_cache(bd_srv_t *, aoff64_t, size_t);
60static errno_t hr_raid1_bd_write_blocks(bd_srv_t *, aoff64_t, size_t,
61 const void *, size_t);
62static errno_t hr_raid1_bd_get_block_size(bd_srv_t *, size_t *);
63static errno_t hr_raid1_bd_get_num_blocks(bd_srv_t *, aoff64_t *);
64
65static bd_ops_t hr_raid1_bd_ops = {
66 .open = hr_raid1_bd_open,
67 .close = hr_raid1_bd_close,
68 .sync_cache = hr_raid1_bd_sync_cache,
69 .read_blocks = hr_raid1_bd_read_blocks,
70 .write_blocks = hr_raid1_bd_write_blocks,
71 .get_block_size = hr_raid1_bd_get_block_size,
72 .get_num_blocks = hr_raid1_bd_get_num_blocks
73};
74
75static errno_t hr_raid1_check_vol_status(hr_volume_t *vol)
76{
77 if (vol->status == HR_VOL_ONLINE ||
78 vol->status == HR_VOL_DEGRADED)
79 return EOK;
80 return EINVAL;
81}
82
83/*
84 * Update vol->status and return EOK if volume
85 * is usable
86 */
87static errno_t hr_raid1_update_vol_status(hr_volume_t *vol)
88{
89 hr_vol_status_t old_state = vol->status;
90 size_t healthy = 0;
91 for (size_t i = 0; i < vol->dev_no; i++)
92 if (vol->extents[i].status == HR_EXT_ONLINE)
93 healthy++;
94
95 if (healthy == 0) {
96 if (old_state != HR_VOL_FAULTY) {
97 log_msg(LOG_DEFAULT, LVL_ERROR,
98 "RAID 1 needs at least 1 extent to be ONLINE, "
99 "marking \"%s\" (%lu) as FAULTY",
100 vol->devname, vol->svc_id);
101 vol->status = HR_VOL_FAULTY;
102 }
103 return EINVAL;
104 } else if (healthy < vol->dev_no) {
105 if (old_state != HR_VOL_DEGRADED) {
106 log_msg(LOG_DEFAULT, LVL_ERROR,
107 "RAID 1 array \"%s\" (%lu) has some inactive "
108 "extents, marking as DEGRADED",
109 vol->devname, vol->svc_id);
110 vol->status = HR_VOL_DEGRADED;
111 }
112 return EOK;
113 } else {
114 if (old_state != HR_VOL_ONLINE) {
115 log_msg(LOG_DEFAULT, LVL_ERROR,
116 "RAID 1 array \"%s\" (%lu) has all extents active, "
117 "marking as ONLINE",
118 vol->devname, vol->svc_id);
119 vol->status = HR_VOL_ONLINE;
120 }
121 return EOK;
122 }
123}
124
125static errno_t hr_raid1_bd_open(bd_srvs_t *bds, bd_srv_t *bd)
126{
127 log_msg(LOG_DEFAULT, LVL_NOTE, "hr_bd_open()");
128 return EOK;
129}
130
131static errno_t hr_raid1_bd_close(bd_srv_t *bd)
132{
133 log_msg(LOG_DEFAULT, LVL_NOTE, "hr_bd_close()");
134 return EOK;
135}
136
137static void handle_extent_error(hr_volume_t *vol, size_t extent,
138 errno_t rc)
139{
140 if (rc == ENOENT)
141 hr_update_ext_status(vol, extent, HR_EXT_MISSING);
142 else if (rc != EOK)
143 hr_update_ext_status(vol, extent, HR_EXT_FAILED);
144}
145
146static errno_t hr_raid1_bd_op(hr_bd_op_type_t type, bd_srv_t *bd, aoff64_t ba,
147 size_t cnt, void *data_read, const void *data_write, size_t size)
148{
149 hr_volume_t *vol = bd->srvs->sarg;
150 errno_t rc;
151 size_t i;
152
153 if (type == HR_BD_READ || type == HR_BD_WRITE)
154 if (size < cnt * vol->bsize)
155 return EINVAL;
156
157 rc = hr_check_ba_range(vol, cnt, ba);
158 if (rc != EOK)
159 return rc;
160
161 hr_add_ba_offset(vol, &ba);
162
163 fibril_mutex_lock(&vol->lock);
164
165 rc = hr_raid1_check_vol_status(vol);
166 if (rc != EOK) {
167 fibril_mutex_unlock(&vol->lock);
168 return EIO;
169 }
170
171 size_t successful = 0;
172 switch (type) {
173 case HR_BD_SYNC:
174 for (i = 0; i < vol->dev_no; i++) {
175 if (vol->extents[i].status != HR_EXT_ONLINE)
176 continue;
177 rc = block_sync_cache(vol->extents[i].svc_id, ba, cnt);
178 if (rc != EOK && rc != ENOTSUP)
179 handle_extent_error(vol, i, rc);
180 else
181 successful++;
182 }
183 break;
184 case HR_BD_READ:
185 for (i = 0; i < vol->dev_no; i++) {
186 if (vol->extents[i].status != HR_EXT_ONLINE)
187 continue;
188 rc = block_read_direct(vol->extents[i].svc_id, ba, cnt,
189 data_read);
190 if (rc != EOK)
191 handle_extent_error(vol, i, rc);
192 else
193 successful++;
194 }
195 break;
196 case HR_BD_WRITE:
197 for (i = 0; i < vol->dev_no; i++) {
198 if (vol->extents[i].status != HR_EXT_ONLINE)
199 continue;
200 rc = block_write_direct(vol->extents[i].svc_id, ba, cnt,
201 data_write);
202 if (rc != EOK)
203 handle_extent_error(vol, i, rc);
204 else
205 successful++;
206 }
207 break;
208 default:
209 rc = EINVAL;
210 }
211
212 if (successful > 0)
213 rc = EOK;
214 else
215 rc = EIO;
216
217 (void) hr_raid1_update_vol_status(vol);
218 fibril_mutex_unlock(&vol->lock);
219 return rc;
220}
221
222static errno_t hr_raid1_bd_sync_cache(bd_srv_t *bd, aoff64_t ba, size_t cnt)
223{
224 return hr_raid1_bd_op(HR_BD_SYNC, bd, ba, cnt, NULL, NULL, 0);
225}
226
227static errno_t hr_raid1_bd_read_blocks(bd_srv_t *bd, aoff64_t ba, size_t cnt,
228 void *buf, size_t size)
229{
230 return hr_raid1_bd_op(HR_BD_READ, bd, ba, cnt, buf, NULL, size);
231}
232
233static errno_t hr_raid1_bd_write_blocks(bd_srv_t *bd, aoff64_t ba, size_t cnt,
234 const void *data, size_t size)
235{
236 return hr_raid1_bd_op(HR_BD_WRITE, bd, ba, cnt, NULL, data, size);
237}
238
239static errno_t hr_raid1_bd_get_block_size(bd_srv_t *bd, size_t *rsize)
240{
241 hr_volume_t *vol = bd->srvs->sarg;
242
243 *rsize = vol->bsize;
244 return EOK;
245}
246
247static errno_t hr_raid1_bd_get_num_blocks(bd_srv_t *bd, aoff64_t *rnb)
248{
249 hr_volume_t *vol = bd->srvs->sarg;
250
251 *rnb = vol->data_blkno;
252 return EOK;
253}
254
255errno_t hr_raid1_create(hr_volume_t *new_volume)
256{
257 errno_t rc;
258
259 assert(new_volume->level == HR_LVL_1);
260
261 if (new_volume->dev_no < 2) {
262 log_msg(LOG_DEFAULT, LVL_ERROR,
263 "RAID 1 array needs at least 2 devices");
264 return EINVAL;
265 }
266
267 rc = hr_raid1_update_vol_status(new_volume);
268 if (rc != EOK)
269 return rc;
270
271 bd_srvs_init(&new_volume->hr_bds);
272 new_volume->hr_bds.ops = &hr_raid1_bd_ops;
273 new_volume->hr_bds.sarg = new_volume;
274
275 rc = hr_register_volume(new_volume);
276
277 return rc;
278}
279
280errno_t hr_raid1_init(hr_volume_t *vol)
281{
282 errno_t rc;
283 size_t bsize;
284 uint64_t total_blkno;
285
286 assert(vol->level == HR_LVL_1);
287
288 rc = hr_check_devs(vol, &total_blkno, &bsize);
289 if (rc != EOK)
290 return rc;
291
292 vol->nblocks = total_blkno / vol->dev_no;
293 vol->bsize = bsize;
294 vol->data_offset = HR_DATA_OFF;
295 vol->data_blkno = vol->nblocks - vol->data_offset;
296 vol->strip_size = 0;
297
298 return EOK;
299}
300
301/** @}
302 */
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