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3bd94003 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
9d09e663 N |
2 | /* |
3 | * Copyright (C) 2010-2011 Neil Brown | |
5380c05b | 4 | * Copyright (C) 2010-2018 Red Hat, Inc. All rights reserved. |
9d09e663 N |
5 | * |
6 | * This file is released under the GPL. | |
7 | */ | |
8 | ||
9 | #include <linux/slab.h> | |
056075c7 | 10 | #include <linux/module.h> |
9d09e663 N |
11 | |
12 | #include "md.h" | |
32737279 | 13 | #include "raid1.h" |
9d09e663 | 14 | #include "raid5.h" |
63f33b8d | 15 | #include "raid10.h" |
935fe098 | 16 | #include "md-bitmap.h" |
9d09e663 | 17 | |
3e8dbb7f AK |
18 | #include <linux/device-mapper.h> |
19 | ||
9d09e663 | 20 | #define DM_MSG_PREFIX "raid" |
92c83d79 | 21 | #define MAX_RAID_DEVICES 253 /* md-raid kernel limit */ |
9d09e663 | 22 | |
40ba37e5 HM |
23 | /* |
24 | * Minimum sectors of free reshape space per raid device | |
25 | */ | |
26 | #define MIN_FREE_RESHAPE_SPACE to_sector(4*4096) | |
27 | ||
63c32ed4 HM |
28 | /* |
29 | * Minimum journal space 4 MiB in sectors. | |
30 | */ | |
31 | #define MIN_RAID456_JOURNAL_SPACE (4*2048) | |
32 | ||
2f06cd12 | 33 | static bool devices_handle_discard_safely; |
48cf06bc | 34 | |
9d09e663 | 35 | /* |
b30f1607 | 36 | * The following flags are used by dm-raid to set up the array state. |
b12d437b | 37 | * They must be cleared before md_run is called. |
9d09e663 | 38 | */ |
43157840 | 39 | #define FirstUse 10 /* rdev flag */ |
9d09e663 N |
40 | |
41 | struct raid_dev { | |
42 | /* | |
43 | * Two DM devices, one to hold metadata and one to hold the | |
43157840 | 44 | * actual data/parity. The reason for this is to not confuse |
9d09e663 N |
45 | * ti->len and give more flexibility in altering size and |
46 | * characteristics. | |
47 | * | |
48 | * While it is possible for this device to be associated | |
49 | * with a different physical device than the data_dev, it | |
50 | * is intended for it to be the same. | |
51 | * |--------- Physical Device ---------| | |
52 | * |- meta_dev -|------ data_dev ------| | |
53 | */ | |
54 | struct dm_dev *meta_dev; | |
55 | struct dm_dev *data_dev; | |
3cb03002 | 56 | struct md_rdev rdev; |
9d09e663 N |
57 | }; |
58 | ||
59 | /* | |
4286325b | 60 | * Bits for establishing rs->ctr_flags |
702108d1 HM |
61 | * |
62 | * 1 = no flag value | |
63 | * 2 = flag with value | |
9d09e663 | 64 | */ |
4286325b MS |
65 | #define __CTR_FLAG_SYNC 0 /* 1 */ /* Not with raid0! */ |
66 | #define __CTR_FLAG_NOSYNC 1 /* 1 */ /* Not with raid0! */ | |
67 | #define __CTR_FLAG_REBUILD 2 /* 2 */ /* Not with raid0! */ | |
68 | #define __CTR_FLAG_DAEMON_SLEEP 3 /* 2 */ /* Not with raid0! */ | |
69 | #define __CTR_FLAG_MIN_RECOVERY_RATE 4 /* 2 */ /* Not with raid0! */ | |
70 | #define __CTR_FLAG_MAX_RECOVERY_RATE 5 /* 2 */ /* Not with raid0! */ | |
71 | #define __CTR_FLAG_MAX_WRITE_BEHIND 6 /* 2 */ /* Only with raid1! */ | |
72 | #define __CTR_FLAG_WRITE_MOSTLY 7 /* 2 */ /* Only with raid1! */ | |
73 | #define __CTR_FLAG_STRIPE_CACHE 8 /* 2 */ /* Only with raid4/5/6! */ | |
74 | #define __CTR_FLAG_REGION_SIZE 9 /* 2 */ /* Not with raid0! */ | |
75 | #define __CTR_FLAG_RAID10_COPIES 10 /* 2 */ /* Only with raid10 */ | |
76 | #define __CTR_FLAG_RAID10_FORMAT 11 /* 2 */ /* Only with raid10 */ | |
9b6e5423 | 77 | /* New for v1.9.0 */ |
d7ccc2e2 | 78 | #define __CTR_FLAG_DELTA_DISKS 12 /* 2 */ /* Only with reshapable raid1/4/5/6/10! */ |
4286325b MS |
79 | #define __CTR_FLAG_DATA_OFFSET 13 /* 2 */ /* Only with reshapable raid4/5/6/10! */ |
80 | #define __CTR_FLAG_RAID10_USE_NEAR_SETS 14 /* 2 */ /* Only with raid10! */ | |
81 | ||
63c32ed4 | 82 | /* New for v1.10.0 */ |
6e53636f HM |
83 | #define __CTR_FLAG_JOURNAL_DEV 15 /* 2 */ /* Only with raid4/5/6 (journal device)! */ |
84 | ||
85 | /* New for v1.11.1 */ | |
86 | #define __CTR_FLAG_JOURNAL_MODE 16 /* 2 */ /* Only with raid4/5/6 (journal mode)! */ | |
63c32ed4 | 87 | |
4286325b MS |
88 | /* |
89 | * Flags for rs->ctr_flags field. | |
90 | */ | |
91 | #define CTR_FLAG_SYNC (1 << __CTR_FLAG_SYNC) | |
92 | #define CTR_FLAG_NOSYNC (1 << __CTR_FLAG_NOSYNC) | |
93 | #define CTR_FLAG_REBUILD (1 << __CTR_FLAG_REBUILD) | |
94 | #define CTR_FLAG_DAEMON_SLEEP (1 << __CTR_FLAG_DAEMON_SLEEP) | |
95 | #define CTR_FLAG_MIN_RECOVERY_RATE (1 << __CTR_FLAG_MIN_RECOVERY_RATE) | |
96 | #define CTR_FLAG_MAX_RECOVERY_RATE (1 << __CTR_FLAG_MAX_RECOVERY_RATE) | |
97 | #define CTR_FLAG_MAX_WRITE_BEHIND (1 << __CTR_FLAG_MAX_WRITE_BEHIND) | |
98 | #define CTR_FLAG_WRITE_MOSTLY (1 << __CTR_FLAG_WRITE_MOSTLY) | |
99 | #define CTR_FLAG_STRIPE_CACHE (1 << __CTR_FLAG_STRIPE_CACHE) | |
100 | #define CTR_FLAG_REGION_SIZE (1 << __CTR_FLAG_REGION_SIZE) | |
101 | #define CTR_FLAG_RAID10_COPIES (1 << __CTR_FLAG_RAID10_COPIES) | |
102 | #define CTR_FLAG_RAID10_FORMAT (1 << __CTR_FLAG_RAID10_FORMAT) | |
103 | #define CTR_FLAG_DELTA_DISKS (1 << __CTR_FLAG_DELTA_DISKS) | |
104 | #define CTR_FLAG_DATA_OFFSET (1 << __CTR_FLAG_DATA_OFFSET) | |
105 | #define CTR_FLAG_RAID10_USE_NEAR_SETS (1 << __CTR_FLAG_RAID10_USE_NEAR_SETS) | |
63c32ed4 | 106 | #define CTR_FLAG_JOURNAL_DEV (1 << __CTR_FLAG_JOURNAL_DEV) |
6e53636f | 107 | #define CTR_FLAG_JOURNAL_MODE (1 << __CTR_FLAG_JOURNAL_MODE) |
63f33b8d | 108 | |
f090279e HM |
109 | /* |
110 | * Definitions of various constructor flags to | |
111 | * be used in checks of valid / invalid flags | |
112 | * per raid level. | |
113 | */ | |
114 | /* Define all any sync flags */ | |
115 | #define CTR_FLAGS_ANY_SYNC (CTR_FLAG_SYNC | CTR_FLAG_NOSYNC) | |
116 | ||
117 | /* Define flags for options without argument (e.g. 'nosync') */ | |
33e53f06 HM |
118 | #define CTR_FLAG_OPTIONS_NO_ARGS (CTR_FLAGS_ANY_SYNC | \ |
119 | CTR_FLAG_RAID10_USE_NEAR_SETS) | |
f090279e HM |
120 | |
121 | /* Define flags for options with one argument (e.g. 'delta_disks +2') */ | |
122 | #define CTR_FLAG_OPTIONS_ONE_ARG (CTR_FLAG_REBUILD | \ | |
123 | CTR_FLAG_WRITE_MOSTLY | \ | |
124 | CTR_FLAG_DAEMON_SLEEP | \ | |
125 | CTR_FLAG_MIN_RECOVERY_RATE | \ | |
126 | CTR_FLAG_MAX_RECOVERY_RATE | \ | |
127 | CTR_FLAG_MAX_WRITE_BEHIND | \ | |
128 | CTR_FLAG_STRIPE_CACHE | \ | |
129 | CTR_FLAG_REGION_SIZE | \ | |
130 | CTR_FLAG_RAID10_COPIES | \ | |
33e53f06 HM |
131 | CTR_FLAG_RAID10_FORMAT | \ |
132 | CTR_FLAG_DELTA_DISKS | \ | |
43f3952a HM |
133 | CTR_FLAG_DATA_OFFSET | \ |
134 | CTR_FLAG_JOURNAL_DEV | \ | |
135 | CTR_FLAG_JOURNAL_MODE) | |
f090279e | 136 | |
a30cbc0d HM |
137 | /* Valid options definitions per raid level... */ |
138 | ||
139 | /* "raid0" does only accept data offset */ | |
140 | #define RAID0_VALID_FLAGS (CTR_FLAG_DATA_OFFSET) | |
141 | ||
142 | /* "raid1" does not accept stripe cache, data offset, delta_disks or any raid10 options */ | |
143 | #define RAID1_VALID_FLAGS (CTR_FLAGS_ANY_SYNC | \ | |
144 | CTR_FLAG_REBUILD | \ | |
145 | CTR_FLAG_WRITE_MOSTLY | \ | |
146 | CTR_FLAG_DAEMON_SLEEP | \ | |
147 | CTR_FLAG_MIN_RECOVERY_RATE | \ | |
148 | CTR_FLAG_MAX_RECOVERY_RATE | \ | |
149 | CTR_FLAG_MAX_WRITE_BEHIND | \ | |
150 | CTR_FLAG_REGION_SIZE | \ | |
7a7c330f | 151 | CTR_FLAG_DELTA_DISKS | \ |
a30cbc0d | 152 | CTR_FLAG_DATA_OFFSET) |
f090279e | 153 | |
a30cbc0d HM |
154 | /* "raid10" does not accept any raid1 or stripe cache options */ |
155 | #define RAID10_VALID_FLAGS (CTR_FLAGS_ANY_SYNC | \ | |
156 | CTR_FLAG_REBUILD | \ | |
157 | CTR_FLAG_DAEMON_SLEEP | \ | |
158 | CTR_FLAG_MIN_RECOVERY_RATE | \ | |
159 | CTR_FLAG_MAX_RECOVERY_RATE | \ | |
160 | CTR_FLAG_REGION_SIZE | \ | |
f090279e | 161 | CTR_FLAG_RAID10_COPIES | \ |
33e53f06 HM |
162 | CTR_FLAG_RAID10_FORMAT | \ |
163 | CTR_FLAG_DELTA_DISKS | \ | |
a30cbc0d HM |
164 | CTR_FLAG_DATA_OFFSET | \ |
165 | CTR_FLAG_RAID10_USE_NEAR_SETS) | |
f090279e | 166 | |
f090279e HM |
167 | /* |
168 | * "raid4/5/6" do not accept any raid1 or raid10 specific options | |
169 | * | |
170 | * "raid6" does not accept "nosync", because it is not guaranteed | |
171 | * that both parity and q-syndrome are being written properly with | |
172 | * any writes | |
173 | */ | |
a30cbc0d HM |
174 | #define RAID45_VALID_FLAGS (CTR_FLAGS_ANY_SYNC | \ |
175 | CTR_FLAG_REBUILD | \ | |
176 | CTR_FLAG_DAEMON_SLEEP | \ | |
177 | CTR_FLAG_MIN_RECOVERY_RATE | \ | |
178 | CTR_FLAG_MAX_RECOVERY_RATE | \ | |
a30cbc0d HM |
179 | CTR_FLAG_STRIPE_CACHE | \ |
180 | CTR_FLAG_REGION_SIZE | \ | |
181 | CTR_FLAG_DELTA_DISKS | \ | |
63c32ed4 | 182 | CTR_FLAG_DATA_OFFSET | \ |
6e53636f HM |
183 | CTR_FLAG_JOURNAL_DEV | \ |
184 | CTR_FLAG_JOURNAL_MODE) | |
a30cbc0d HM |
185 | |
186 | #define RAID6_VALID_FLAGS (CTR_FLAG_SYNC | \ | |
187 | CTR_FLAG_REBUILD | \ | |
188 | CTR_FLAG_DAEMON_SLEEP | \ | |
189 | CTR_FLAG_MIN_RECOVERY_RATE | \ | |
190 | CTR_FLAG_MAX_RECOVERY_RATE | \ | |
a30cbc0d HM |
191 | CTR_FLAG_STRIPE_CACHE | \ |
192 | CTR_FLAG_REGION_SIZE | \ | |
193 | CTR_FLAG_DELTA_DISKS | \ | |
63c32ed4 | 194 | CTR_FLAG_DATA_OFFSET | \ |
6e53636f HM |
195 | CTR_FLAG_JOURNAL_DEV | \ |
196 | CTR_FLAG_JOURNAL_MODE) | |
a30cbc0d | 197 | /* ...valid options definitions per raid level */ |
f090279e | 198 | |
ecbfb9f1 HM |
199 | /* |
200 | * Flags for rs->runtime_flags field | |
201 | * (RT_FLAG prefix meaning "runtime flag") | |
202 | * | |
203 | * These are all internal and used to define runtime state, | |
204 | * e.g. to prevent another resume from preresume processing | |
205 | * the raid set all over again. | |
206 | */ | |
40ba37e5 HM |
207 | #define RT_FLAG_RS_PRERESUMED 0 |
208 | #define RT_FLAG_RS_RESUMED 1 | |
209 | #define RT_FLAG_RS_BITMAP_LOADED 2 | |
210 | #define RT_FLAG_UPDATE_SBS 3 | |
9dbd1aa3 | 211 | #define RT_FLAG_RESHAPE_RS 4 |
0cf352e5 | 212 | #define RT_FLAG_RS_SUSPENDED 5 |
242ea5ad | 213 | #define RT_FLAG_RS_IN_SYNC 6 |
4102d9de | 214 | #define RT_FLAG_RS_RESYNCING 7 |
99273d9e | 215 | #define RT_FLAG_RS_GROW 8 |
ecbfb9f1 | 216 | |
d7ccc2e2 | 217 | /* Array elements of 64 bit needed for rebuild/failed disk bits */ |
33e53f06 HM |
218 | #define DISKS_ARRAY_ELEMS ((MAX_RAID_DEVICES + (sizeof(uint64_t) * 8 - 1)) / sizeof(uint64_t) / 8) |
219 | ||
ecbfb9f1 HM |
220 | /* |
221 | * raid set level, layout and chunk sectors backup/restore | |
222 | */ | |
223 | struct rs_layout { | |
224 | int new_level; | |
225 | int new_layout; | |
226 | int new_chunk_sectors; | |
227 | }; | |
228 | ||
9d09e663 N |
229 | struct raid_set { |
230 | struct dm_target *ti; | |
231 | ||
9dbd1aa3 | 232 | uint32_t stripe_cache_entries; |
4286325b MS |
233 | unsigned long ctr_flags; |
234 | unsigned long runtime_flags; | |
ecbfb9f1 HM |
235 | |
236 | uint64_t rebuild_disks[DISKS_ARRAY_ELEMS]; | |
9d09e663 | 237 | |
33e53f06 HM |
238 | int raid_disks; |
239 | int delta_disks; | |
4763e543 | 240 | int data_offset; |
33e53f06 | 241 | int raid10_copies; |
4257e085 | 242 | int requested_bitmap_chunk_sectors; |
33e53f06 | 243 | |
fd01b88c | 244 | struct mddev md; |
9d09e663 | 245 | struct raid_type *raid_type; |
9d09e663 | 246 | |
99273d9e HM |
247 | sector_t array_sectors; |
248 | sector_t dev_sectors; | |
249 | ||
63c32ed4 HM |
250 | /* Optional raid4/5/6 journal device */ |
251 | struct journal_dev { | |
252 | struct dm_dev *dev; | |
253 | struct md_rdev rdev; | |
6e53636f | 254 | int mode; |
63c32ed4 HM |
255 | } journal_dev; |
256 | ||
e3260d90 | 257 | struct raid_dev dev[] __counted_by(raid_disks); |
9d09e663 N |
258 | }; |
259 | ||
9dbd1aa3 | 260 | static void rs_config_backup(struct raid_set *rs, struct rs_layout *l) |
ecbfb9f1 HM |
261 | { |
262 | struct mddev *mddev = &rs->md; | |
263 | ||
264 | l->new_level = mddev->new_level; | |
265 | l->new_layout = mddev->new_layout; | |
266 | l->new_chunk_sectors = mddev->new_chunk_sectors; | |
267 | } | |
268 | ||
9dbd1aa3 | 269 | static void rs_config_restore(struct raid_set *rs, struct rs_layout *l) |
ecbfb9f1 HM |
270 | { |
271 | struct mddev *mddev = &rs->md; | |
272 | ||
273 | mddev->new_level = l->new_level; | |
274 | mddev->new_layout = l->new_layout; | |
275 | mddev->new_chunk_sectors = l->new_chunk_sectors; | |
276 | } | |
277 | ||
33e53f06 HM |
278 | /* raid10 algorithms (i.e. formats) */ |
279 | #define ALGORITHM_RAID10_DEFAULT 0 | |
280 | #define ALGORITHM_RAID10_NEAR 1 | |
281 | #define ALGORITHM_RAID10_OFFSET 2 | |
282 | #define ALGORITHM_RAID10_FAR 3 | |
283 | ||
9d09e663 N |
284 | /* Supported raid types and properties. */ |
285 | static struct raid_type { | |
286 | const char *name; /* RAID algorithm. */ | |
287 | const char *descr; /* Descriptor text for logging. */ | |
094f394d HM |
288 | const unsigned int parity_devs; /* # of parity devices. */ |
289 | const unsigned int minimal_devs;/* minimal # of devices in set. */ | |
290 | const unsigned int level; /* RAID level. */ | |
291 | const unsigned int algorithm; /* RAID algorithm. */ | |
9d09e663 | 292 | } raid_types[] = { |
43157840 MS |
293 | {"raid0", "raid0 (striping)", 0, 2, 0, 0 /* NONE */}, |
294 | {"raid1", "raid1 (mirroring)", 0, 2, 1, 0 /* NONE */}, | |
295 | {"raid10_far", "raid10 far (striped mirrors)", 0, 2, 10, ALGORITHM_RAID10_FAR}, | |
33e53f06 | 296 | {"raid10_offset", "raid10 offset (striped mirrors)", 0, 2, 10, ALGORITHM_RAID10_OFFSET}, |
43157840 MS |
297 | {"raid10_near", "raid10 near (striped mirrors)", 0, 2, 10, ALGORITHM_RAID10_NEAR}, |
298 | {"raid10", "raid10 (striped mirrors)", 0, 2, 10, ALGORITHM_RAID10_DEFAULT}, | |
b052b07c | 299 | {"raid4", "raid4 (dedicated first parity disk)", 1, 2, 5, ALGORITHM_PARITY_0}, /* raid4 layout = raid5_0 */ |
43157840 MS |
300 | {"raid5_n", "raid5 (dedicated last parity disk)", 1, 2, 5, ALGORITHM_PARITY_N}, |
301 | {"raid5_ls", "raid5 (left symmetric)", 1, 2, 5, ALGORITHM_LEFT_SYMMETRIC}, | |
302 | {"raid5_rs", "raid5 (right symmetric)", 1, 2, 5, ALGORITHM_RIGHT_SYMMETRIC}, | |
303 | {"raid5_la", "raid5 (left asymmetric)", 1, 2, 5, ALGORITHM_LEFT_ASYMMETRIC}, | |
304 | {"raid5_ra", "raid5 (right asymmetric)", 1, 2, 5, ALGORITHM_RIGHT_ASYMMETRIC}, | |
305 | {"raid6_zr", "raid6 (zero restart)", 2, 4, 6, ALGORITHM_ROTATING_ZERO_RESTART}, | |
306 | {"raid6_nr", "raid6 (N restart)", 2, 4, 6, ALGORITHM_ROTATING_N_RESTART}, | |
307 | {"raid6_nc", "raid6 (N continue)", 2, 4, 6, ALGORITHM_ROTATING_N_CONTINUE}, | |
308 | {"raid6_n_6", "raid6 (dedicated parity/Q n/6)", 2, 4, 6, ALGORITHM_PARITY_N_6}, | |
309 | {"raid6_ls_6", "raid6 (left symmetric dedicated Q 6)", 2, 4, 6, ALGORITHM_LEFT_SYMMETRIC_6}, | |
310 | {"raid6_rs_6", "raid6 (right symmetric dedicated Q 6)", 2, 4, 6, ALGORITHM_RIGHT_SYMMETRIC_6}, | |
311 | {"raid6_la_6", "raid6 (left asymmetric dedicated Q 6)", 2, 4, 6, ALGORITHM_LEFT_ASYMMETRIC_6}, | |
312 | {"raid6_ra_6", "raid6 (right asymmetric dedicated Q 6)", 2, 4, 6, ALGORITHM_RIGHT_ASYMMETRIC_6} | |
9d09e663 N |
313 | }; |
314 | ||
92c83d79 | 315 | /* True, if @v is in inclusive range [@min, @max] */ |
bb91a63f | 316 | static bool __within_range(long v, long min, long max) |
92c83d79 HM |
317 | { |
318 | return v >= min && v <= max; | |
319 | } | |
320 | ||
702108d1 HM |
321 | /* All table line arguments are defined here */ |
322 | static struct arg_name_flag { | |
4286325b | 323 | const unsigned long flag; |
702108d1 | 324 | const char *name; |
e6ca5e1a | 325 | } __arg_name_flags[] = { |
702108d1 HM |
326 | { CTR_FLAG_SYNC, "sync"}, |
327 | { CTR_FLAG_NOSYNC, "nosync"}, | |
328 | { CTR_FLAG_REBUILD, "rebuild"}, | |
329 | { CTR_FLAG_DAEMON_SLEEP, "daemon_sleep"}, | |
330 | { CTR_FLAG_MIN_RECOVERY_RATE, "min_recovery_rate"}, | |
331 | { CTR_FLAG_MAX_RECOVERY_RATE, "max_recovery_rate"}, | |
332 | { CTR_FLAG_MAX_WRITE_BEHIND, "max_write_behind"}, | |
65359ee6 | 333 | { CTR_FLAG_WRITE_MOSTLY, "write_mostly"}, |
702108d1 HM |
334 | { CTR_FLAG_STRIPE_CACHE, "stripe_cache"}, |
335 | { CTR_FLAG_REGION_SIZE, "region_size"}, | |
336 | { CTR_FLAG_RAID10_COPIES, "raid10_copies"}, | |
337 | { CTR_FLAG_RAID10_FORMAT, "raid10_format"}, | |
4763e543 HM |
338 | { CTR_FLAG_DATA_OFFSET, "data_offset"}, |
339 | { CTR_FLAG_DELTA_DISKS, "delta_disks"}, | |
340 | { CTR_FLAG_RAID10_USE_NEAR_SETS, "raid10_use_near_sets"}, | |
63c32ed4 | 341 | { CTR_FLAG_JOURNAL_DEV, "journal_dev" }, |
6e53636f | 342 | { CTR_FLAG_JOURNAL_MODE, "journal_mode" }, |
702108d1 HM |
343 | }; |
344 | ||
345 | /* Return argument name string for given @flag */ | |
3fa6cf38 | 346 | static const char *dm_raid_arg_name_by_flag(const uint32_t flag) |
702108d1 HM |
347 | { |
348 | if (hweight32(flag) == 1) { | |
e6ca5e1a | 349 | struct arg_name_flag *anf = __arg_name_flags + ARRAY_SIZE(__arg_name_flags); |
702108d1 | 350 | |
e6ca5e1a | 351 | while (anf-- > __arg_name_flags) |
4286325b | 352 | if (flag & anf->flag) |
702108d1 HM |
353 | return anf->name; |
354 | ||
355 | } else | |
356 | DMERR("%s called with more than one flag!", __func__); | |
357 | ||
358 | return NULL; | |
359 | } | |
360 | ||
6e53636f HM |
361 | /* Define correlation of raid456 journal cache modes and dm-raid target line parameters */ |
362 | static struct { | |
363 | const int mode; | |
364 | const char *param; | |
365 | } _raid456_journal_mode[] = { | |
255e2646 HM |
366 | { R5C_JOURNAL_MODE_WRITE_THROUGH, "writethrough" }, |
367 | { R5C_JOURNAL_MODE_WRITE_BACK, "writeback" } | |
6e53636f HM |
368 | }; |
369 | ||
370 | /* Return MD raid4/5/6 journal mode for dm @journal_mode one */ | |
371 | static int dm_raid_journal_mode_to_md(const char *mode) | |
372 | { | |
373 | int m = ARRAY_SIZE(_raid456_journal_mode); | |
374 | ||
375 | while (m--) | |
376 | if (!strcasecmp(mode, _raid456_journal_mode[m].param)) | |
377 | return _raid456_journal_mode[m].mode; | |
378 | ||
379 | return -EINVAL; | |
380 | } | |
381 | ||
382 | /* Return dm-raid raid4/5/6 journal mode string for @mode */ | |
383 | static const char *md_journal_mode_to_dm_raid(const int mode) | |
384 | { | |
385 | int m = ARRAY_SIZE(_raid456_journal_mode); | |
386 | ||
387 | while (m--) | |
388 | if (mode == _raid456_journal_mode[m].mode) | |
389 | return _raid456_journal_mode[m].param; | |
390 | ||
391 | return "unknown"; | |
392 | } | |
393 | ||
33e53f06 | 394 | /* |
d7ccc2e2 HM |
395 | * Bool helpers to test for various raid levels of a raid set. |
396 | * It's level as reported by the superblock rather than | |
33e53f06 HM |
397 | * the requested raid_type passed to the constructor. |
398 | */ | |
399 | /* Return true, if raid set in @rs is raid0 */ | |
400 | static bool rs_is_raid0(struct raid_set *rs) | |
401 | { | |
402 | return !rs->md.level; | |
403 | } | |
404 | ||
9dbd1aa3 HM |
405 | /* Return true, if raid set in @rs is raid1 */ |
406 | static bool rs_is_raid1(struct raid_set *rs) | |
407 | { | |
408 | return rs->md.level == 1; | |
409 | } | |
410 | ||
33e53f06 HM |
411 | /* Return true, if raid set in @rs is raid10 */ |
412 | static bool rs_is_raid10(struct raid_set *rs) | |
413 | { | |
414 | return rs->md.level == 10; | |
415 | } | |
416 | ||
4dff2f1e HM |
417 | /* Return true, if raid set in @rs is level 6 */ |
418 | static bool rs_is_raid6(struct raid_set *rs) | |
419 | { | |
420 | return rs->md.level == 6; | |
421 | } | |
422 | ||
40ba37e5 HM |
423 | /* Return true, if raid set in @rs is level 4, 5 or 6 */ |
424 | static bool rs_is_raid456(struct raid_set *rs) | |
425 | { | |
426 | return __within_range(rs->md.level, 4, 6); | |
427 | } | |
428 | ||
429 | /* Return true, if raid set in @rs is reshapable */ | |
d7ccc2e2 | 430 | static bool __is_raid10_far(int layout); |
40ba37e5 HM |
431 | static bool rs_is_reshapable(struct raid_set *rs) |
432 | { | |
433 | return rs_is_raid456(rs) || | |
434 | (rs_is_raid10(rs) && !__is_raid10_far(rs->md.new_layout)); | |
435 | } | |
436 | ||
9dbd1aa3 HM |
437 | /* Return true, if raid set in @rs is recovering */ |
438 | static bool rs_is_recovering(struct raid_set *rs) | |
439 | { | |
50c4feb9 | 440 | return rs->md.recovery_cp < rs->md.dev_sectors; |
9dbd1aa3 HM |
441 | } |
442 | ||
443 | /* Return true, if raid set in @rs is reshaping */ | |
444 | static bool rs_is_reshaping(struct raid_set *rs) | |
445 | { | |
9dbd1aa3 HM |
446 | return rs->md.reshape_position != MaxSector; |
447 | } | |
448 | ||
f090279e | 449 | /* |
d7ccc2e2 | 450 | * bool helpers to test for various raid levels of a raid type @rt |
f090279e HM |
451 | */ |
452 | ||
453 | /* Return true, if raid type in @rt is raid0 */ | |
454 | static bool rt_is_raid0(struct raid_type *rt) | |
455 | { | |
456 | return !rt->level; | |
457 | } | |
458 | ||
459 | /* Return true, if raid type in @rt is raid1 */ | |
460 | static bool rt_is_raid1(struct raid_type *rt) | |
461 | { | |
462 | return rt->level == 1; | |
463 | } | |
464 | ||
465 | /* Return true, if raid type in @rt is raid10 */ | |
466 | static bool rt_is_raid10(struct raid_type *rt) | |
467 | { | |
468 | return rt->level == 10; | |
469 | } | |
470 | ||
471 | /* Return true, if raid type in @rt is raid4/5 */ | |
472 | static bool rt_is_raid45(struct raid_type *rt) | |
473 | { | |
bb91a63f | 474 | return __within_range(rt->level, 4, 5); |
f090279e HM |
475 | } |
476 | ||
477 | /* Return true, if raid type in @rt is raid6 */ | |
478 | static bool rt_is_raid6(struct raid_type *rt) | |
479 | { | |
480 | return rt->level == 6; | |
481 | } | |
676fa5ad HM |
482 | |
483 | /* Return true, if raid type in @rt is raid4/5/6 */ | |
484 | static bool rt_is_raid456(struct raid_type *rt) | |
485 | { | |
bb91a63f | 486 | return __within_range(rt->level, 4, 6); |
676fa5ad | 487 | } |
f090279e HM |
488 | /* END: raid level bools */ |
489 | ||
a30cbc0d HM |
490 | /* Return valid ctr flags for the raid level of @rs */ |
491 | static unsigned long __valid_flags(struct raid_set *rs) | |
f090279e HM |
492 | { |
493 | if (rt_is_raid0(rs->raid_type)) | |
a30cbc0d | 494 | return RAID0_VALID_FLAGS; |
f090279e | 495 | else if (rt_is_raid1(rs->raid_type)) |
a30cbc0d | 496 | return RAID1_VALID_FLAGS; |
f090279e | 497 | else if (rt_is_raid10(rs->raid_type)) |
a30cbc0d | 498 | return RAID10_VALID_FLAGS; |
f090279e | 499 | else if (rt_is_raid45(rs->raid_type)) |
a30cbc0d | 500 | return RAID45_VALID_FLAGS; |
f090279e | 501 | else if (rt_is_raid6(rs->raid_type)) |
a30cbc0d | 502 | return RAID6_VALID_FLAGS; |
f090279e | 503 | |
d7ccc2e2 | 504 | return 0; |
f090279e HM |
505 | } |
506 | ||
507 | /* | |
a30cbc0d | 508 | * Check for valid flags set on @rs |
f090279e HM |
509 | * |
510 | * Has to be called after parsing of the ctr flags! | |
511 | */ | |
a30cbc0d | 512 | static int rs_check_for_valid_flags(struct raid_set *rs) |
f090279e | 513 | { |
a30cbc0d | 514 | if (rs->ctr_flags & ~__valid_flags(rs)) { |
4286325b | 515 | rs->ti->error = "Invalid flags combination"; |
bd83a4c4 MS |
516 | return -EINVAL; |
517 | } | |
f090279e HM |
518 | |
519 | return 0; | |
520 | } | |
521 | ||
33e53f06 HM |
522 | /* MD raid10 bit definitions and helpers */ |
523 | #define RAID10_OFFSET (1 << 16) /* stripes with data copies area adjacent on devices */ | |
524 | #define RAID10_BROCKEN_USE_FAR_SETS (1 << 17) /* Broken in raid10.c: use sets instead of whole stripe rotation */ | |
525 | #define RAID10_USE_FAR_SETS (1 << 18) /* Use sets instead of whole stripe rotation */ | |
526 | #define RAID10_FAR_COPIES_SHIFT 8 /* raid10 # far copies shift (2nd byte of layout) */ | |
527 | ||
528 | /* Return md raid10 near copies for @layout */ | |
e6ca5e1a | 529 | static unsigned int __raid10_near_copies(int layout) |
33e53f06 HM |
530 | { |
531 | return layout & 0xFF; | |
532 | } | |
533 | ||
534 | /* Return md raid10 far copies for @layout */ | |
e6ca5e1a | 535 | static unsigned int __raid10_far_copies(int layout) |
33e53f06 | 536 | { |
e6ca5e1a | 537 | return __raid10_near_copies(layout >> RAID10_FAR_COPIES_SHIFT); |
33e53f06 HM |
538 | } |
539 | ||
540 | /* Return true if md raid10 offset for @layout */ | |
d7ccc2e2 | 541 | static bool __is_raid10_offset(int layout) |
33e53f06 | 542 | { |
d7ccc2e2 | 543 | return !!(layout & RAID10_OFFSET); |
33e53f06 HM |
544 | } |
545 | ||
546 | /* Return true if md raid10 near for @layout */ | |
d7ccc2e2 | 547 | static bool __is_raid10_near(int layout) |
33e53f06 | 548 | { |
e6ca5e1a | 549 | return !__is_raid10_offset(layout) && __raid10_near_copies(layout) > 1; |
33e53f06 HM |
550 | } |
551 | ||
552 | /* Return true if md raid10 far for @layout */ | |
d7ccc2e2 | 553 | static bool __is_raid10_far(int layout) |
33e53f06 | 554 | { |
e6ca5e1a | 555 | return !__is_raid10_offset(layout) && __raid10_far_copies(layout) > 1; |
33e53f06 HM |
556 | } |
557 | ||
558 | /* Return md raid10 layout string for @layout */ | |
559 | static const char *raid10_md_layout_to_format(int layout) | |
fe5d2f4a JB |
560 | { |
561 | /* | |
33e53f06 HM |
562 | * Bit 16 stands for "offset" |
563 | * (i.e. adjacent stripes hold copies) | |
564 | * | |
fe5d2f4a JB |
565 | * Refer to MD's raid10.c for details |
566 | */ | |
e6ca5e1a | 567 | if (__is_raid10_offset(layout)) |
fe5d2f4a JB |
568 | return "offset"; |
569 | ||
e6ca5e1a | 570 | if (__raid10_near_copies(layout) > 1) |
fe5d2f4a JB |
571 | return "near"; |
572 | ||
bbac1e06 HM |
573 | if (__raid10_far_copies(layout) > 1) |
574 | return "far"; | |
33e53f06 | 575 | |
bbac1e06 | 576 | return "unknown"; |
fe5d2f4a JB |
577 | } |
578 | ||
33e53f06 | 579 | /* Return md raid10 algorithm for @name */ |
f2ccaa59 | 580 | static int raid10_name_to_format(const char *name) |
33e53f06 HM |
581 | { |
582 | if (!strcasecmp(name, "near")) | |
583 | return ALGORITHM_RAID10_NEAR; | |
584 | else if (!strcasecmp(name, "offset")) | |
585 | return ALGORITHM_RAID10_OFFSET; | |
586 | else if (!strcasecmp(name, "far")) | |
587 | return ALGORITHM_RAID10_FAR; | |
588 | ||
589 | return -EINVAL; | |
590 | } | |
591 | ||
33e53f06 HM |
592 | /* Return md raid10 copies for @layout */ |
593 | static unsigned int raid10_md_layout_to_copies(int layout) | |
63f33b8d | 594 | { |
d7ccc2e2 | 595 | return max(__raid10_near_copies(layout), __raid10_far_copies(layout)); |
63f33b8d JB |
596 | } |
597 | ||
33e53f06 HM |
598 | /* Return md raid10 format id for @format string */ |
599 | static int raid10_format_to_md_layout(struct raid_set *rs, | |
600 | unsigned int algorithm, | |
601 | unsigned int copies) | |
63f33b8d | 602 | { |
33e53f06 | 603 | unsigned int n = 1, f = 1, r = 0; |
fe5d2f4a | 604 | |
33e53f06 HM |
605 | /* |
606 | * MD resilienece flaw: | |
607 | * | |
608 | * enabling use_far_sets for far/offset formats causes copies | |
609 | * to be colocated on the same devs together with their origins! | |
610 | * | |
611 | * -> disable it for now in the definition above | |
612 | */ | |
613 | if (algorithm == ALGORITHM_RAID10_DEFAULT || | |
614 | algorithm == ALGORITHM_RAID10_NEAR) | |
fe5d2f4a | 615 | n = copies; |
33e53f06 HM |
616 | |
617 | else if (algorithm == ALGORITHM_RAID10_OFFSET) { | |
618 | f = copies; | |
619 | r = RAID10_OFFSET; | |
4286325b | 620 | if (!test_bit(__CTR_FLAG_RAID10_USE_NEAR_SETS, &rs->ctr_flags)) |
33e53f06 HM |
621 | r |= RAID10_USE_FAR_SETS; |
622 | ||
623 | } else if (algorithm == ALGORITHM_RAID10_FAR) { | |
fe5d2f4a | 624 | f = copies; |
4286325b | 625 | if (!test_bit(__CTR_FLAG_RAID10_USE_NEAR_SETS, &rs->ctr_flags)) |
33e53f06 | 626 | r |= RAID10_USE_FAR_SETS; |
fe5d2f4a | 627 | |
33e53f06 HM |
628 | } else |
629 | return -EINVAL; | |
630 | ||
631 | return r | (f << RAID10_FAR_COPIES_SHIFT) | n; | |
632 | } | |
633 | /* END: MD raid10 bit definitions and helpers */ | |
fe5d2f4a | 634 | |
33e53f06 | 635 | /* Check for any of the raid10 algorithms */ |
d7ccc2e2 | 636 | static bool __got_raid10(struct raid_type *rtp, const int layout) |
33e53f06 HM |
637 | { |
638 | if (rtp->level == 10) { | |
639 | switch (rtp->algorithm) { | |
640 | case ALGORITHM_RAID10_DEFAULT: | |
641 | case ALGORITHM_RAID10_NEAR: | |
e6ca5e1a | 642 | return __is_raid10_near(layout); |
33e53f06 | 643 | case ALGORITHM_RAID10_OFFSET: |
e6ca5e1a | 644 | return __is_raid10_offset(layout); |
33e53f06 | 645 | case ALGORITHM_RAID10_FAR: |
e6ca5e1a | 646 | return __is_raid10_far(layout); |
33e53f06 HM |
647 | default: |
648 | break; | |
649 | } | |
650 | } | |
fe5d2f4a | 651 | |
d7ccc2e2 | 652 | return false; |
63f33b8d JB |
653 | } |
654 | ||
33e53f06 | 655 | /* Return raid_type for @name */ |
92c83d79 | 656 | static struct raid_type *get_raid_type(const char *name) |
9d09e663 | 657 | { |
33e53f06 | 658 | struct raid_type *rtp = raid_types + ARRAY_SIZE(raid_types); |
9d09e663 | 659 | |
33e53f06 HM |
660 | while (rtp-- > raid_types) |
661 | if (!strcasecmp(rtp->name, name)) | |
662 | return rtp; | |
9d09e663 N |
663 | |
664 | return NULL; | |
665 | } | |
666 | ||
33e53f06 HM |
667 | /* Return raid_type for @name based derived from @level and @layout */ |
668 | static struct raid_type *get_raid_type_by_ll(const int level, const int layout) | |
669 | { | |
670 | struct raid_type *rtp = raid_types + ARRAY_SIZE(raid_types); | |
671 | ||
672 | while (rtp-- > raid_types) { | |
673 | /* RAID10 special checks based on @layout flags/properties */ | |
674 | if (rtp->level == level && | |
e6ca5e1a | 675 | (__got_raid10(rtp, layout) || rtp->algorithm == layout)) |
33e53f06 HM |
676 | return rtp; |
677 | } | |
678 | ||
679 | return NULL; | |
680 | } | |
681 | ||
61e06e2c HM |
682 | /* Adjust rdev sectors */ |
683 | static void rs_set_rdev_sectors(struct raid_set *rs) | |
9dbd1aa3 HM |
684 | { |
685 | struct mddev *mddev = &rs->md; | |
fbe6365b | 686 | struct md_rdev *rdev; |
9dbd1aa3 | 687 | |
fbe6365b HM |
688 | /* |
689 | * raid10 sets rdev->sector to the device size, which | |
690 | * is unintended in case of out-of-place reshaping | |
691 | */ | |
692 | rdev_for_each(rdev, mddev) | |
63c32ed4 HM |
693 | if (!test_bit(Journal, &rdev->flags)) |
694 | rdev->sectors = mddev->dev_sectors; | |
61e06e2c | 695 | } |
fbe6365b | 696 | |
61e06e2c HM |
697 | /* |
698 | * Change bdev capacity of @rs in case of a disk add/remove reshape | |
699 | */ | |
700 | static void rs_set_capacity(struct raid_set *rs) | |
701 | { | |
702 | struct gendisk *gendisk = dm_disk(dm_table_get_md(rs->ti->table)); | |
703 | ||
dc2985a8 | 704 | set_capacity_and_notify(gendisk, rs->md.array_sectors); |
9dbd1aa3 HM |
705 | } |
706 | ||
3a1c1ef2 HM |
707 | /* |
708 | * Set the mddev properties in @rs to the current | |
709 | * ones retrieved from the freshest superblock | |
710 | */ | |
711 | static void rs_set_cur(struct raid_set *rs) | |
712 | { | |
713 | struct mddev *mddev = &rs->md; | |
714 | ||
715 | mddev->new_level = mddev->level; | |
716 | mddev->new_layout = mddev->layout; | |
717 | mddev->new_chunk_sectors = mddev->chunk_sectors; | |
718 | } | |
719 | ||
33e53f06 HM |
720 | /* |
721 | * Set the mddev properties in @rs to the new | |
722 | * ones requested by the ctr | |
723 | */ | |
724 | static void rs_set_new(struct raid_set *rs) | |
725 | { | |
726 | struct mddev *mddev = &rs->md; | |
727 | ||
728 | mddev->level = mddev->new_level; | |
729 | mddev->layout = mddev->new_layout; | |
730 | mddev->chunk_sectors = mddev->new_chunk_sectors; | |
3a1c1ef2 | 731 | mddev->raid_disks = rs->raid_disks; |
33e53f06 HM |
732 | mddev->delta_disks = 0; |
733 | } | |
734 | ||
bfcee0e3 | 735 | static struct raid_set *raid_set_alloc(struct dm_target *ti, struct raid_type *raid_type, |
094f394d | 736 | unsigned int raid_devs) |
9d09e663 | 737 | { |
094f394d | 738 | unsigned int i; |
9d09e663 | 739 | struct raid_set *rs; |
9d09e663 | 740 | |
bd83a4c4 MS |
741 | if (raid_devs <= raid_type->parity_devs) { |
742 | ti->error = "Insufficient number of devices"; | |
743 | return ERR_PTR(-EINVAL); | |
744 | } | |
9d09e663 | 745 | |
acafe7e3 | 746 | rs = kzalloc(struct_size(rs, dev, raid_devs), GFP_KERNEL); |
bd83a4c4 MS |
747 | if (!rs) { |
748 | ti->error = "Cannot allocate raid context"; | |
749 | return ERR_PTR(-ENOMEM); | |
750 | } | |
9d09e663 | 751 | |
d58eff83 YK |
752 | if (mddev_init(&rs->md)) { |
753 | kfree(rs); | |
754 | ti->error = "Cannot initialize raid context"; | |
755 | return ERR_PTR(-ENOMEM); | |
756 | } | |
9d09e663 | 757 | |
33e53f06 HM |
758 | rs->raid_disks = raid_devs; |
759 | rs->delta_disks = 0; | |
760 | ||
9d09e663 N |
761 | rs->ti = ti; |
762 | rs->raid_type = raid_type; | |
9dbd1aa3 | 763 | rs->stripe_cache_entries = 256; |
9d09e663 N |
764 | rs->md.raid_disks = raid_devs; |
765 | rs->md.level = raid_type->level; | |
766 | rs->md.new_level = rs->md.level; | |
9d09e663 N |
767 | rs->md.layout = raid_type->algorithm; |
768 | rs->md.new_layout = rs->md.layout; | |
769 | rs->md.delta_disks = 0; | |
4dff2f1e | 770 | rs->md.recovery_cp = MaxSector; |
9d09e663 N |
771 | |
772 | for (i = 0; i < raid_devs; i++) | |
773 | md_rdev_init(&rs->dev[i].rdev); | |
774 | ||
775 | /* | |
776 | * Remaining items to be initialized by further RAID params: | |
777 | * rs->md.persistent | |
778 | * rs->md.external | |
779 | * rs->md.chunk_sectors | |
780 | * rs->md.new_chunk_sectors | |
c039c332 | 781 | * rs->md.dev_sectors |
9d09e663 N |
782 | */ |
783 | ||
784 | return rs; | |
785 | } | |
786 | ||
38b0bd0c | 787 | /* Free all @rs allocations */ |
bfcee0e3 | 788 | static void raid_set_free(struct raid_set *rs) |
9d09e663 N |
789 | { |
790 | int i; | |
791 | ||
63c32ed4 HM |
792 | if (rs->journal_dev.dev) { |
793 | md_rdev_clear(&rs->journal_dev.rdev); | |
794 | dm_put_device(rs->ti, rs->journal_dev.dev); | |
795 | } | |
796 | ||
ffeeac75 | 797 | for (i = 0; i < rs->raid_disks; i++) { |
b12d437b JB |
798 | if (rs->dev[i].meta_dev) |
799 | dm_put_device(rs->ti, rs->dev[i].meta_dev); | |
545c8795 | 800 | md_rdev_clear(&rs->dev[i].rdev); |
9d09e663 N |
801 | if (rs->dev[i].data_dev) |
802 | dm_put_device(rs->ti, rs->dev[i].data_dev); | |
b12d437b | 803 | } |
9d09e663 | 804 | |
d58eff83 | 805 | mddev_destroy(&rs->md); |
9d09e663 N |
806 | kfree(rs); |
807 | } | |
808 | ||
809 | /* | |
810 | * For every device we have two words | |
811 | * <meta_dev>: meta device name or '-' if missing | |
812 | * <data_dev>: data device name or '-' if missing | |
813 | * | |
b12d437b JB |
814 | * The following are permitted: |
815 | * - - | |
816 | * - <data_dev> | |
817 | * <meta_dev> <data_dev> | |
818 | * | |
819 | * The following is not allowed: | |
820 | * <meta_dev> - | |
821 | * | |
822 | * This code parses those words. If there is a failure, | |
bfcee0e3 | 823 | * the caller must use raid_set_free() to unwind the operations. |
9d09e663 | 824 | */ |
702108d1 | 825 | static int parse_dev_params(struct raid_set *rs, struct dm_arg_set *as) |
9d09e663 N |
826 | { |
827 | int i; | |
828 | int rebuild = 0; | |
829 | int metadata_available = 0; | |
73c6f239 | 830 | int r = 0; |
92c83d79 | 831 | const char *arg; |
9d09e663 | 832 | |
92c83d79 HM |
833 | /* Put off the number of raid devices argument to get to dev pairs */ |
834 | arg = dm_shift_arg(as); | |
835 | if (!arg) | |
836 | return -EINVAL; | |
837 | ||
ffeeac75 | 838 | for (i = 0; i < rs->raid_disks; i++) { |
9d09e663 N |
839 | rs->dev[i].rdev.raid_disk = i; |
840 | ||
841 | rs->dev[i].meta_dev = NULL; | |
842 | rs->dev[i].data_dev = NULL; | |
843 | ||
844 | /* | |
63c32ed4 HM |
845 | * There are no offsets initially. |
846 | * Out of place reshape will set them accordingly. | |
9d09e663 N |
847 | */ |
848 | rs->dev[i].rdev.data_offset = 0; | |
63c32ed4 | 849 | rs->dev[i].rdev.new_data_offset = 0; |
9d09e663 N |
850 | rs->dev[i].rdev.mddev = &rs->md; |
851 | ||
92c83d79 HM |
852 | arg = dm_shift_arg(as); |
853 | if (!arg) | |
854 | return -EINVAL; | |
855 | ||
856 | if (strcmp(arg, "-")) { | |
bd83a4c4 MS |
857 | r = dm_get_device(rs->ti, arg, dm_table_get_mode(rs->ti->table), |
858 | &rs->dev[i].meta_dev); | |
859 | if (r) { | |
860 | rs->ti->error = "RAID metadata device lookup failure"; | |
861 | return r; | |
862 | } | |
b12d437b JB |
863 | |
864 | rs->dev[i].rdev.sb_page = alloc_page(GFP_KERNEL); | |
bd83a4c4 MS |
865 | if (!rs->dev[i].rdev.sb_page) { |
866 | rs->ti->error = "Failed to allocate superblock page"; | |
867 | return -ENOMEM; | |
868 | } | |
9d09e663 N |
869 | } |
870 | ||
92c83d79 HM |
871 | arg = dm_shift_arg(as); |
872 | if (!arg) | |
873 | return -EINVAL; | |
874 | ||
875 | if (!strcmp(arg, "-")) { | |
9d09e663 | 876 | if (!test_bit(In_sync, &rs->dev[i].rdev.flags) && |
bd83a4c4 MS |
877 | (!rs->dev[i].rdev.recovery_offset)) { |
878 | rs->ti->error = "Drive designated for rebuild not specified"; | |
879 | return -EINVAL; | |
880 | } | |
9d09e663 | 881 | |
bd83a4c4 MS |
882 | if (rs->dev[i].meta_dev) { |
883 | rs->ti->error = "No data device supplied with metadata device"; | |
884 | return -EINVAL; | |
885 | } | |
b12d437b | 886 | |
9d09e663 N |
887 | continue; |
888 | } | |
889 | ||
bd83a4c4 MS |
890 | r = dm_get_device(rs->ti, arg, dm_table_get_mode(rs->ti->table), |
891 | &rs->dev[i].data_dev); | |
892 | if (r) { | |
893 | rs->ti->error = "RAID device lookup failure"; | |
894 | return r; | |
895 | } | |
9d09e663 | 896 | |
b12d437b JB |
897 | if (rs->dev[i].meta_dev) { |
898 | metadata_available = 1; | |
899 | rs->dev[i].rdev.meta_bdev = rs->dev[i].meta_dev->bdev; | |
900 | } | |
9d09e663 | 901 | rs->dev[i].rdev.bdev = rs->dev[i].data_dev->bdev; |
3a1c1ef2 | 902 | list_add_tail(&rs->dev[i].rdev.same_set, &rs->md.disks); |
9d09e663 N |
903 | if (!test_bit(In_sync, &rs->dev[i].rdev.flags)) |
904 | rebuild++; | |
905 | } | |
906 | ||
63c32ed4 HM |
907 | if (rs->journal_dev.dev) |
908 | list_add_tail(&rs->journal_dev.rdev.same_set, &rs->md.disks); | |
909 | ||
9d09e663 N |
910 | if (metadata_available) { |
911 | rs->md.external = 0; | |
912 | rs->md.persistent = 1; | |
913 | rs->md.major_version = 2; | |
914 | } else if (rebuild && !rs->md.recovery_cp) { | |
915 | /* | |
916 | * Without metadata, we will not be able to tell if the array | |
917 | * is in-sync or not - we must assume it is not. Therefore, | |
918 | * it is impossible to rebuild a drive. | |
919 | * | |
920 | * Even if there is metadata, the on-disk information may | |
921 | * indicate that the array is not in-sync and it will then | |
922 | * fail at that time. | |
923 | * | |
924 | * User could specify 'nosync' option if desperate. | |
925 | */ | |
bd83a4c4 MS |
926 | rs->ti->error = "Unable to rebuild drive while array is not in-sync"; |
927 | return -EINVAL; | |
9d09e663 N |
928 | } |
929 | ||
930 | return 0; | |
931 | } | |
932 | ||
c1084561 JB |
933 | /* |
934 | * validate_region_size | |
935 | * @rs | |
936 | * @region_size: region size in sectors. If 0, pick a size (4MiB default). | |
937 | * | |
938 | * Set rs->md.bitmap_info.chunksize (which really refers to 'region size'). | |
939 | * Ensure that (ti->len/region_size < 2^21) - required by MD bitmap. | |
940 | * | |
941 | * Returns: 0 on success, -EINVAL on failure. | |
942 | */ | |
943 | static int validate_region_size(struct raid_set *rs, unsigned long region_size) | |
944 | { | |
945 | unsigned long min_region_size = rs->ti->len / (1 << 21); | |
946 | ||
9e7d9367 HM |
947 | if (rs_is_raid0(rs)) |
948 | return 0; | |
949 | ||
c1084561 JB |
950 | if (!region_size) { |
951 | /* | |
43157840 | 952 | * Choose a reasonable default. All figures in sectors. |
c1084561 JB |
953 | */ |
954 | if (min_region_size > (1 << 13)) { | |
3a0f9aae | 955 | /* If not a power of 2, make it the next power of 2 */ |
042745ee | 956 | region_size = roundup_pow_of_two(min_region_size); |
c1084561 JB |
957 | DMINFO("Choosing default region size of %lu sectors", |
958 | region_size); | |
c1084561 JB |
959 | } else { |
960 | DMINFO("Choosing default region size of 4MiB"); | |
961 | region_size = 1 << 13; /* sectors */ | |
962 | } | |
963 | } else { | |
964 | /* | |
965 | * Validate user-supplied value. | |
966 | */ | |
bd83a4c4 MS |
967 | if (region_size > rs->ti->len) { |
968 | rs->ti->error = "Supplied region size is too large"; | |
969 | return -EINVAL; | |
970 | } | |
c1084561 JB |
971 | |
972 | if (region_size < min_region_size) { | |
973 | DMERR("Supplied region_size (%lu sectors) below minimum (%lu)", | |
974 | region_size, min_region_size); | |
bd83a4c4 MS |
975 | rs->ti->error = "Supplied region size is too small"; |
976 | return -EINVAL; | |
c1084561 JB |
977 | } |
978 | ||
bd83a4c4 MS |
979 | if (!is_power_of_2(region_size)) { |
980 | rs->ti->error = "Region size is not a power of 2"; | |
981 | return -EINVAL; | |
982 | } | |
c1084561 | 983 | |
bd83a4c4 MS |
984 | if (region_size < rs->md.chunk_sectors) { |
985 | rs->ti->error = "Region size is smaller than the chunk size"; | |
986 | return -EINVAL; | |
987 | } | |
c1084561 JB |
988 | } |
989 | ||
990 | /* | |
991 | * Convert sectors to bytes. | |
992 | */ | |
89d3d9a1 | 993 | rs->md.bitmap_info.chunksize = to_bytes(region_size); |
c1084561 JB |
994 | |
995 | return 0; | |
996 | } | |
997 | ||
eb649123 | 998 | /* |
55ebbb59 | 999 | * validate_raid_redundancy |
eb649123 JB |
1000 | * @rs |
1001 | * | |
55ebbb59 JB |
1002 | * Determine if there are enough devices in the array that haven't |
1003 | * failed (or are being rebuilt) to form a usable array. | |
eb649123 JB |
1004 | * |
1005 | * Returns: 0 on success, -EINVAL on failure. | |
1006 | */ | |
55ebbb59 | 1007 | static int validate_raid_redundancy(struct raid_set *rs) |
eb649123 | 1008 | { |
094f394d | 1009 | unsigned int i, rebuild_cnt = 0; |
332bd077 | 1010 | unsigned int rebuilds_per_group = 0, copies, raid_disks; |
094f394d | 1011 | unsigned int group_size, last_group_start; |
eb649123 | 1012 | |
332bd077 HM |
1013 | for (i = 0; i < rs->raid_disks; i++) |
1014 | if (!test_bit(FirstUse, &rs->dev[i].rdev.flags) && | |
1015 | ((!test_bit(In_sync, &rs->dev[i].rdev.flags) || | |
1016 | !rs->dev[i].rdev.sb_page))) | |
eb649123 JB |
1017 | rebuild_cnt++; |
1018 | ||
53bf5384 | 1019 | switch (rs->md.level) { |
9e7d9367 HM |
1020 | case 0: |
1021 | break; | |
eb649123 JB |
1022 | case 1: |
1023 | if (rebuild_cnt >= rs->md.raid_disks) | |
1024 | goto too_many; | |
1025 | break; | |
1026 | case 4: | |
1027 | case 5: | |
1028 | case 6: | |
1029 | if (rebuild_cnt > rs->raid_type->parity_devs) | |
1030 | goto too_many; | |
1031 | break; | |
1032 | case 10: | |
9dbd1aa3 | 1033 | copies = raid10_md_layout_to_copies(rs->md.new_layout); |
53bf5384 HM |
1034 | if (copies < 2) { |
1035 | DMERR("Bogus raid10 data copies < 2!"); | |
1036 | return -EINVAL; | |
1037 | } | |
1038 | ||
4ec1e369 JB |
1039 | if (rebuild_cnt < copies) |
1040 | break; | |
1041 | ||
1042 | /* | |
1043 | * It is possible to have a higher rebuild count for RAID10, | |
1044 | * as long as the failed devices occur in different mirror | |
1045 | * groups (i.e. different stripes). | |
1046 | * | |
4ec1e369 JB |
1047 | * When checking "near" format, make sure no adjacent devices |
1048 | * have failed beyond what can be handled. In addition to the | |
1049 | * simple case where the number of devices is a multiple of the | |
1050 | * number of copies, we must also handle cases where the number | |
1051 | * of devices is not a multiple of the number of copies. | |
43157840 MS |
1052 | * E.g. dev1 dev2 dev3 dev4 dev5 |
1053 | * A A B B C | |
1054 | * C D D E E | |
4ec1e369 | 1055 | */ |
332bd077 | 1056 | raid_disks = min(rs->raid_disks, rs->md.raid_disks); |
9dbd1aa3 | 1057 | if (__is_raid10_near(rs->md.new_layout)) { |
332bd077 | 1058 | for (i = 0; i < raid_disks; i++) { |
fe5d2f4a JB |
1059 | if (!(i % copies)) |
1060 | rebuilds_per_group = 0; | |
9dbd1aa3 | 1061 | if ((!rs->dev[i].rdev.sb_page || |
40ba37e5 | 1062 | !test_bit(In_sync, &rs->dev[i].rdev.flags)) && |
fe5d2f4a JB |
1063 | (++rebuilds_per_group >= copies)) |
1064 | goto too_many; | |
1065 | } | |
1066 | break; | |
1067 | } | |
1068 | ||
1069 | /* | |
1070 | * When checking "far" and "offset" formats, we need to ensure | |
1071 | * that the device that holds its copy is not also dead or | |
1072 | * being rebuilt. (Note that "far" and "offset" formats only | |
1073 | * support two copies right now. These formats also only ever | |
1074 | * use the 'use_far_sets' variant.) | |
1075 | * | |
1076 | * This check is somewhat complicated by the need to account | |
43157840 | 1077 | * for arrays that are not a multiple of (far) copies. This |
fe5d2f4a JB |
1078 | * results in the need to treat the last (potentially larger) |
1079 | * set differently. | |
1080 | */ | |
332bd077 HM |
1081 | group_size = (raid_disks / copies); |
1082 | last_group_start = (raid_disks / group_size) - 1; | |
fe5d2f4a | 1083 | last_group_start *= group_size; |
332bd077 | 1084 | for (i = 0; i < raid_disks; i++) { |
fe5d2f4a | 1085 | if (!(i % copies) && !(i > last_group_start)) |
55ebbb59 | 1086 | rebuilds_per_group = 0; |
fe5d2f4a JB |
1087 | if ((!rs->dev[i].rdev.sb_page || |
1088 | !test_bit(In_sync, &rs->dev[i].rdev.flags)) && | |
4ec1e369 | 1089 | (++rebuilds_per_group >= copies)) |
23fda2ef | 1090 | goto too_many; |
4ec1e369 JB |
1091 | } |
1092 | break; | |
eb649123 | 1093 | default: |
55ebbb59 JB |
1094 | if (rebuild_cnt) |
1095 | return -EINVAL; | |
eb649123 JB |
1096 | } |
1097 | ||
1098 | return 0; | |
1099 | ||
1100 | too_many: | |
eb649123 JB |
1101 | return -EINVAL; |
1102 | } | |
1103 | ||
9d09e663 N |
1104 | /* |
1105 | * Possible arguments are... | |
9d09e663 N |
1106 | * <chunk_size> [optional_args] |
1107 | * | |
32737279 JB |
1108 | * Argument definitions |
1109 | * <chunk_size> The number of sectors per disk that | |
43157840 | 1110 | * will form the "stripe" |
32737279 | 1111 | * [[no]sync] Force or prevent recovery of the |
43157840 | 1112 | * entire array |
9d09e663 | 1113 | * [rebuild <idx>] Rebuild the drive indicated by the index |
32737279 | 1114 | * [daemon_sleep <ms>] Time between bitmap daemon work to |
43157840 | 1115 | * clear bits |
9d09e663 N |
1116 | * [min_recovery_rate <kB/sec/disk>] Throttle RAID initialization |
1117 | * [max_recovery_rate <kB/sec/disk>] Throttle RAID initialization | |
46bed2b5 | 1118 | * [write_mostly <idx>] Indicate a write mostly drive via index |
9d09e663 N |
1119 | * [max_write_behind <sectors>] See '-write-behind=' (man mdadm) |
1120 | * [stripe_cache <sectors>] Stripe cache size for higher RAIDs | |
43157840 | 1121 | * [region_size <sectors>] Defines granularity of bitmap |
63c32ed4 | 1122 | * [journal_dev <dev>] raid4/5/6 journaling deviice |
255e2646 | 1123 | * (i.e. write hole closing log) |
63f33b8d JB |
1124 | * |
1125 | * RAID10-only options: | |
43157840 | 1126 | * [raid10_copies <# copies>] Number of copies. (Default: 2) |
fe5d2f4a | 1127 | * [raid10_format <near|far|offset>] Layout algorithm. (Default: near) |
9d09e663 | 1128 | */ |
92c83d79 | 1129 | static int parse_raid_params(struct raid_set *rs, struct dm_arg_set *as, |
094f394d | 1130 | unsigned int num_raid_params) |
9d09e663 | 1131 | { |
9dbd1aa3 | 1132 | int value, raid10_format = ALGORITHM_RAID10_DEFAULT; |
094f394d HM |
1133 | unsigned int raid10_copies = 2; |
1134 | unsigned int i, write_mostly = 0; | |
1135 | unsigned int region_size = 0; | |
542f9038 | 1136 | sector_t max_io_len; |
92c83d79 | 1137 | const char *arg, *key; |
702108d1 | 1138 | struct raid_dev *rd; |
33e53f06 | 1139 | struct raid_type *rt = rs->raid_type; |
92c83d79 HM |
1140 | |
1141 | arg = dm_shift_arg(as); | |
1142 | num_raid_params--; /* Account for chunk_size argument */ | |
1143 | ||
9dbd1aa3 | 1144 | if (kstrtoint(arg, 10, &value) < 0) { |
bd83a4c4 MS |
1145 | rs->ti->error = "Bad numerical argument given for chunk_size"; |
1146 | return -EINVAL; | |
1147 | } | |
9d09e663 N |
1148 | |
1149 | /* | |
1150 | * First, parse the in-order required arguments | |
32737279 | 1151 | * "chunk_size" is the only argument of this type. |
9d09e663 | 1152 | */ |
33e53f06 | 1153 | if (rt_is_raid1(rt)) { |
32737279 JB |
1154 | if (value) |
1155 | DMERR("Ignoring chunk size parameter for RAID 1"); | |
1156 | value = 0; | |
bd83a4c4 MS |
1157 | } else if (!is_power_of_2(value)) { |
1158 | rs->ti->error = "Chunk size must be a power of 2"; | |
1159 | return -EINVAL; | |
1160 | } else if (value < 8) { | |
1161 | rs->ti->error = "Chunk size value is too small"; | |
1162 | return -EINVAL; | |
1163 | } | |
9d09e663 N |
1164 | |
1165 | rs->md.new_chunk_sectors = rs->md.chunk_sectors = value; | |
9d09e663 N |
1166 | |
1167 | /* | |
b12d437b JB |
1168 | * We set each individual device as In_sync with a completed |
1169 | * 'recovery_offset'. If there has been a device failure or | |
1170 | * replacement then one of the following cases applies: | |
1171 | * | |
1172 | * 1) User specifies 'rebuild'. | |
43157840 | 1173 | * - Device is reset when param is read. |
b12d437b | 1174 | * 2) A new device is supplied. |
43157840 | 1175 | * - No matching superblock found, resets device. |
b12d437b | 1176 | * 3) Device failure was transient and returns on reload. |
43157840 | 1177 | * - Failure noticed, resets device for bitmap replay. |
b12d437b | 1178 | * 4) Device hadn't completed recovery after previous failure. |
43157840 | 1179 | * - Superblock is read and overrides recovery_offset. |
b12d437b JB |
1180 | * |
1181 | * What is found in the superblocks of the devices is always | |
1182 | * authoritative, unless 'rebuild' or '[no]sync' was specified. | |
9d09e663 | 1183 | */ |
ffeeac75 | 1184 | for (i = 0; i < rs->raid_disks; i++) { |
9d09e663 | 1185 | set_bit(In_sync, &rs->dev[i].rdev.flags); |
b12d437b JB |
1186 | rs->dev[i].rdev.recovery_offset = MaxSector; |
1187 | } | |
9d09e663 | 1188 | |
b12d437b JB |
1189 | /* |
1190 | * Second, parse the unordered optional arguments | |
1191 | */ | |
9d09e663 | 1192 | for (i = 0; i < num_raid_params; i++) { |
4763e543 | 1193 | key = dm_shift_arg(as); |
bd83a4c4 MS |
1194 | if (!key) { |
1195 | rs->ti->error = "Not enough raid parameters given"; | |
1196 | return -EINVAL; | |
1197 | } | |
92c83d79 | 1198 | |
3fa6cf38 | 1199 | if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_NOSYNC))) { |
4286325b | 1200 | if (test_and_set_bit(__CTR_FLAG_NOSYNC, &rs->ctr_flags)) { |
bd83a4c4 MS |
1201 | rs->ti->error = "Only one 'nosync' argument allowed"; |
1202 | return -EINVAL; | |
1203 | } | |
9d09e663 N |
1204 | continue; |
1205 | } | |
3fa6cf38 | 1206 | if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_SYNC))) { |
4286325b | 1207 | if (test_and_set_bit(__CTR_FLAG_SYNC, &rs->ctr_flags)) { |
bd83a4c4 MS |
1208 | rs->ti->error = "Only one 'sync' argument allowed"; |
1209 | return -EINVAL; | |
1210 | } | |
4763e543 HM |
1211 | continue; |
1212 | } | |
3fa6cf38 | 1213 | if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_RAID10_USE_NEAR_SETS))) { |
4286325b | 1214 | if (test_and_set_bit(__CTR_FLAG_RAID10_USE_NEAR_SETS, &rs->ctr_flags)) { |
bd83a4c4 MS |
1215 | rs->ti->error = "Only one 'raid10_use_new_sets' argument allowed"; |
1216 | return -EINVAL; | |
1217 | } | |
9d09e663 N |
1218 | continue; |
1219 | } | |
1220 | ||
92c83d79 HM |
1221 | arg = dm_shift_arg(as); |
1222 | i++; /* Account for the argument pairs */ | |
bd83a4c4 MS |
1223 | if (!arg) { |
1224 | rs->ti->error = "Wrong number of raid parameters given"; | |
1225 | return -EINVAL; | |
1226 | } | |
63f33b8d | 1227 | |
702108d1 HM |
1228 | /* |
1229 | * Parameters that take a string value are checked here. | |
1230 | */ | |
63c32ed4 | 1231 | /* "raid10_format {near|offset|far} */ |
3fa6cf38 | 1232 | if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_RAID10_FORMAT))) { |
4286325b | 1233 | if (test_and_set_bit(__CTR_FLAG_RAID10_FORMAT, &rs->ctr_flags)) { |
bd83a4c4 MS |
1234 | rs->ti->error = "Only one 'raid10_format' argument pair allowed"; |
1235 | return -EINVAL; | |
1236 | } | |
1237 | if (!rt_is_raid10(rt)) { | |
1238 | rs->ti->error = "'raid10_format' is an invalid parameter for this RAID type"; | |
1239 | return -EINVAL; | |
1240 | } | |
33e53f06 | 1241 | raid10_format = raid10_name_to_format(arg); |
bd83a4c4 MS |
1242 | if (raid10_format < 0) { |
1243 | rs->ti->error = "Invalid 'raid10_format' value given"; | |
1244 | return raid10_format; | |
1245 | } | |
63f33b8d JB |
1246 | continue; |
1247 | } | |
1248 | ||
6e53636f | 1249 | /* "journal_dev <dev>" */ |
63c32ed4 HM |
1250 | if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_JOURNAL_DEV))) { |
1251 | int r; | |
1252 | struct md_rdev *jdev; | |
1253 | ||
1254 | if (test_and_set_bit(__CTR_FLAG_JOURNAL_DEV, &rs->ctr_flags)) { | |
1255 | rs->ti->error = "Only one raid4/5/6 set journaling device allowed"; | |
1256 | return -EINVAL; | |
1257 | } | |
1258 | if (!rt_is_raid456(rt)) { | |
1259 | rs->ti->error = "'journal_dev' is an invalid parameter for this RAID type"; | |
1260 | return -EINVAL; | |
1261 | } | |
1262 | r = dm_get_device(rs->ti, arg, dm_table_get_mode(rs->ti->table), | |
1263 | &rs->journal_dev.dev); | |
1264 | if (r) { | |
1265 | rs->ti->error = "raid4/5/6 journal device lookup failure"; | |
1266 | return r; | |
1267 | } | |
1268 | jdev = &rs->journal_dev.rdev; | |
1269 | md_rdev_init(jdev); | |
1270 | jdev->mddev = &rs->md; | |
1271 | jdev->bdev = rs->journal_dev.dev->bdev; | |
6dcbb52c | 1272 | jdev->sectors = bdev_nr_sectors(jdev->bdev); |
63c32ed4 HM |
1273 | if (jdev->sectors < MIN_RAID456_JOURNAL_SPACE) { |
1274 | rs->ti->error = "No space for raid4/5/6 journal"; | |
1275 | return -ENOSPC; | |
1276 | } | |
6e53636f | 1277 | rs->journal_dev.mode = R5C_JOURNAL_MODE_WRITE_THROUGH; |
63c32ed4 HM |
1278 | set_bit(Journal, &jdev->flags); |
1279 | continue; | |
1280 | } | |
1281 | ||
6e53636f HM |
1282 | /* "journal_mode <mode>" ("journal_dev" mandatory!) */ |
1283 | if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_JOURNAL_MODE))) { | |
1284 | int r; | |
1285 | ||
1286 | if (!test_bit(__CTR_FLAG_JOURNAL_DEV, &rs->ctr_flags)) { | |
1287 | rs->ti->error = "raid4/5/6 'journal_mode' is invalid without 'journal_dev'"; | |
1288 | return -EINVAL; | |
1289 | } | |
1290 | if (test_and_set_bit(__CTR_FLAG_JOURNAL_MODE, &rs->ctr_flags)) { | |
1291 | rs->ti->error = "Only one raid4/5/6 'journal_mode' argument allowed"; | |
1292 | return -EINVAL; | |
1293 | } | |
1294 | r = dm_raid_journal_mode_to_md(arg); | |
1295 | if (r < 0) { | |
1296 | rs->ti->error = "Invalid 'journal_mode' argument"; | |
1297 | return r; | |
1298 | } | |
1299 | rs->journal_dev.mode = r; | |
1300 | continue; | |
1301 | } | |
1302 | ||
63c32ed4 HM |
1303 | /* |
1304 | * Parameters with number values from here on. | |
1305 | */ | |
9dbd1aa3 | 1306 | if (kstrtoint(arg, 10, &value) < 0) { |
bd83a4c4 MS |
1307 | rs->ti->error = "Bad numerical argument given in raid params"; |
1308 | return -EINVAL; | |
1309 | } | |
702108d1 | 1310 | |
3fa6cf38 | 1311 | if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_REBUILD))) { |
702108d1 HM |
1312 | /* |
1313 | * "rebuild" is being passed in by userspace to provide | |
1314 | * indexes of replaced devices and to set up additional | |
1315 | * devices on raid level takeover. | |
43157840 | 1316 | */ |
bb91a63f | 1317 | if (!__within_range(value, 0, rs->raid_disks - 1)) { |
bd83a4c4 MS |
1318 | rs->ti->error = "Invalid rebuild index given"; |
1319 | return -EINVAL; | |
1320 | } | |
702108d1 | 1321 | |
bd83a4c4 MS |
1322 | if (test_and_set_bit(value, (void *) rs->rebuild_disks)) { |
1323 | rs->ti->error = "rebuild for this index already given"; | |
1324 | return -EINVAL; | |
1325 | } | |
ecbfb9f1 | 1326 | |
702108d1 HM |
1327 | rd = rs->dev + value; |
1328 | clear_bit(In_sync, &rd->rdev.flags); | |
1329 | clear_bit(Faulty, &rd->rdev.flags); | |
1330 | rd->rdev.recovery_offset = 0; | |
4286325b | 1331 | set_bit(__CTR_FLAG_REBUILD, &rs->ctr_flags); |
3fa6cf38 | 1332 | } else if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_WRITE_MOSTLY))) { |
bd83a4c4 MS |
1333 | if (!rt_is_raid1(rt)) { |
1334 | rs->ti->error = "write_mostly option is only valid for RAID1"; | |
1335 | return -EINVAL; | |
1336 | } | |
702108d1 | 1337 | |
bb91a63f | 1338 | if (!__within_range(value, 0, rs->md.raid_disks - 1)) { |
bd83a4c4 MS |
1339 | rs->ti->error = "Invalid write_mostly index given"; |
1340 | return -EINVAL; | |
1341 | } | |
9d09e663 | 1342 | |
5fa146b2 | 1343 | write_mostly++; |
46bed2b5 | 1344 | set_bit(WriteMostly, &rs->dev[value].rdev.flags); |
4286325b | 1345 | set_bit(__CTR_FLAG_WRITE_MOSTLY, &rs->ctr_flags); |
3fa6cf38 | 1346 | } else if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_MAX_WRITE_BEHIND))) { |
bd83a4c4 MS |
1347 | if (!rt_is_raid1(rt)) { |
1348 | rs->ti->error = "max_write_behind option is only valid for RAID1"; | |
1349 | return -EINVAL; | |
1350 | } | |
702108d1 | 1351 | |
4286325b | 1352 | if (test_and_set_bit(__CTR_FLAG_MAX_WRITE_BEHIND, &rs->ctr_flags)) { |
bd83a4c4 MS |
1353 | rs->ti->error = "Only one max_write_behind argument pair allowed"; |
1354 | return -EINVAL; | |
1355 | } | |
9d09e663 N |
1356 | |
1357 | /* | |
1358 | * In device-mapper, we specify things in sectors, but | |
1359 | * MD records this value in kB | |
1360 | */ | |
13bc62d4 | 1361 | if (value < 0 || value / 2 > COUNTER_MAX) { |
bd83a4c4 MS |
1362 | rs->ti->error = "Max write-behind limit out of range"; |
1363 | return -EINVAL; | |
1364 | } | |
702108d1 | 1365 | |
13bc62d4 | 1366 | rs->md.bitmap_info.max_write_behind = value / 2; |
3fa6cf38 | 1367 | } else if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_DAEMON_SLEEP))) { |
4286325b | 1368 | if (test_and_set_bit(__CTR_FLAG_DAEMON_SLEEP, &rs->ctr_flags)) { |
bd83a4c4 MS |
1369 | rs->ti->error = "Only one daemon_sleep argument pair allowed"; |
1370 | return -EINVAL; | |
1371 | } | |
13bc62d4 | 1372 | if (value < 0) { |
bd83a4c4 MS |
1373 | rs->ti->error = "daemon sleep period out of range"; |
1374 | return -EINVAL; | |
1375 | } | |
9d09e663 | 1376 | rs->md.bitmap_info.daemon_sleep = value; |
3fa6cf38 | 1377 | } else if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_DATA_OFFSET))) { |
ce92fc4b | 1378 | /* Userspace passes new data_offset after having extended the data image LV */ |
4286325b | 1379 | if (test_and_set_bit(__CTR_FLAG_DATA_OFFSET, &rs->ctr_flags)) { |
bd83a4c4 MS |
1380 | rs->ti->error = "Only one data_offset argument pair allowed"; |
1381 | return -EINVAL; | |
1382 | } | |
4763e543 | 1383 | /* Ensure sensible data offset */ |
75dd3b9e HM |
1384 | if (value < 0 || |
1385 | (value && (value < MIN_FREE_RESHAPE_SPACE || value % to_sector(PAGE_SIZE)))) { | |
bd83a4c4 MS |
1386 | rs->ti->error = "Bogus data_offset value"; |
1387 | return -EINVAL; | |
1388 | } | |
4763e543 | 1389 | rs->data_offset = value; |
3fa6cf38 | 1390 | } else if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_DELTA_DISKS))) { |
4763e543 | 1391 | /* Define the +/-# of disks to add to/remove from the given raid set */ |
4286325b | 1392 | if (test_and_set_bit(__CTR_FLAG_DELTA_DISKS, &rs->ctr_flags)) { |
bd83a4c4 MS |
1393 | rs->ti->error = "Only one delta_disks argument pair allowed"; |
1394 | return -EINVAL; | |
1395 | } | |
4763e543 | 1396 | /* Ensure MAX_RAID_DEVICES and raid type minimal_devs! */ |
bb91a63f | 1397 | if (!__within_range(abs(value), 1, MAX_RAID_DEVICES - rt->minimal_devs)) { |
bd83a4c4 MS |
1398 | rs->ti->error = "Too many delta_disk requested"; |
1399 | return -EINVAL; | |
1400 | } | |
4763e543 HM |
1401 | |
1402 | rs->delta_disks = value; | |
3fa6cf38 | 1403 | } else if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_STRIPE_CACHE))) { |
4286325b | 1404 | if (test_and_set_bit(__CTR_FLAG_STRIPE_CACHE, &rs->ctr_flags)) { |
bd83a4c4 MS |
1405 | rs->ti->error = "Only one stripe_cache argument pair allowed"; |
1406 | return -EINVAL; | |
1407 | } | |
1408 | ||
bd83a4c4 MS |
1409 | if (!rt_is_raid456(rt)) { |
1410 | rs->ti->error = "Inappropriate argument: stripe_cache"; | |
1411 | return -EINVAL; | |
1412 | } | |
702108d1 | 1413 | |
13bc62d4 HM |
1414 | if (value < 0) { |
1415 | rs->ti->error = "Bogus stripe cache entries value"; | |
1416 | return -EINVAL; | |
1417 | } | |
9dbd1aa3 | 1418 | rs->stripe_cache_entries = value; |
3fa6cf38 | 1419 | } else if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_MIN_RECOVERY_RATE))) { |
4286325b | 1420 | if (test_and_set_bit(__CTR_FLAG_MIN_RECOVERY_RATE, &rs->ctr_flags)) { |
bd83a4c4 MS |
1421 | rs->ti->error = "Only one min_recovery_rate argument pair allowed"; |
1422 | return -EINVAL; | |
1423 | } | |
13bc62d4 HM |
1424 | |
1425 | if (value < 0) { | |
bd83a4c4 MS |
1426 | rs->ti->error = "min_recovery_rate out of range"; |
1427 | return -EINVAL; | |
1428 | } | |
13bc62d4 | 1429 | rs->md.sync_speed_min = value; |
3fa6cf38 | 1430 | } else if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_MAX_RECOVERY_RATE))) { |
f15f64d6 | 1431 | if (test_and_set_bit(__CTR_FLAG_MAX_RECOVERY_RATE, &rs->ctr_flags)) { |
bd83a4c4 MS |
1432 | rs->ti->error = "Only one max_recovery_rate argument pair allowed"; |
1433 | return -EINVAL; | |
1434 | } | |
13bc62d4 HM |
1435 | |
1436 | if (value < 0) { | |
bd83a4c4 MS |
1437 | rs->ti->error = "max_recovery_rate out of range"; |
1438 | return -EINVAL; | |
1439 | } | |
13bc62d4 | 1440 | rs->md.sync_speed_max = value; |
3fa6cf38 | 1441 | } else if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_REGION_SIZE))) { |
4286325b | 1442 | if (test_and_set_bit(__CTR_FLAG_REGION_SIZE, &rs->ctr_flags)) { |
bd83a4c4 MS |
1443 | rs->ti->error = "Only one region_size argument pair allowed"; |
1444 | return -EINVAL; | |
1445 | } | |
702108d1 | 1446 | |
c1084561 | 1447 | region_size = value; |
4257e085 | 1448 | rs->requested_bitmap_chunk_sectors = value; |
3fa6cf38 | 1449 | } else if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_RAID10_COPIES))) { |
4286325b | 1450 | if (test_and_set_bit(__CTR_FLAG_RAID10_COPIES, &rs->ctr_flags)) { |
bd83a4c4 MS |
1451 | rs->ti->error = "Only one raid10_copies argument pair allowed"; |
1452 | return -EINVAL; | |
1453 | } | |
702108d1 | 1454 | |
bb91a63f | 1455 | if (!__within_range(value, 2, rs->md.raid_disks)) { |
bd83a4c4 MS |
1456 | rs->ti->error = "Bad value for 'raid10_copies'"; |
1457 | return -EINVAL; | |
1458 | } | |
702108d1 | 1459 | |
63f33b8d | 1460 | raid10_copies = value; |
9d09e663 N |
1461 | } else { |
1462 | DMERR("Unable to parse RAID parameter: %s", key); | |
bd83a4c4 MS |
1463 | rs->ti->error = "Unable to parse RAID parameter"; |
1464 | return -EINVAL; | |
9d09e663 N |
1465 | } |
1466 | } | |
1467 | ||
0d851d14 HM |
1468 | if (test_bit(__CTR_FLAG_SYNC, &rs->ctr_flags) && |
1469 | test_bit(__CTR_FLAG_NOSYNC, &rs->ctr_flags)) { | |
1470 | rs->ti->error = "sync and nosync are mutually exclusive"; | |
1471 | return -EINVAL; | |
1472 | } | |
1473 | ||
37f10be1 HM |
1474 | if (test_bit(__CTR_FLAG_REBUILD, &rs->ctr_flags) && |
1475 | (test_bit(__CTR_FLAG_SYNC, &rs->ctr_flags) || | |
1476 | test_bit(__CTR_FLAG_NOSYNC, &rs->ctr_flags))) { | |
1477 | rs->ti->error = "sync/nosync and rebuild are mutually exclusive"; | |
1478 | return -EINVAL; | |
1479 | } | |
1480 | ||
5fa146b2 HM |
1481 | if (write_mostly >= rs->md.raid_disks) { |
1482 | rs->ti->error = "Can't set all raid1 devices to write_mostly"; | |
1483 | return -EINVAL; | |
1484 | } | |
1485 | ||
13bc62d4 HM |
1486 | if (rs->md.sync_speed_max && |
1487 | rs->md.sync_speed_min > rs->md.sync_speed_max) { | |
1488 | rs->ti->error = "Bogus recovery rates"; | |
1489 | return -EINVAL; | |
1490 | } | |
1491 | ||
c1084561 JB |
1492 | if (validate_region_size(rs, region_size)) |
1493 | return -EINVAL; | |
1494 | ||
1495 | if (rs->md.chunk_sectors) | |
542f9038 | 1496 | max_io_len = rs->md.chunk_sectors; |
c1084561 | 1497 | else |
542f9038 | 1498 | max_io_len = region_size; |
c1084561 | 1499 | |
542f9038 MS |
1500 | if (dm_set_target_max_io_len(rs->ti, max_io_len)) |
1501 | return -EINVAL; | |
32737279 | 1502 | |
33e53f06 | 1503 | if (rt_is_raid10(rt)) { |
bd83a4c4 MS |
1504 | if (raid10_copies > rs->md.raid_disks) { |
1505 | rs->ti->error = "Not enough devices to satisfy specification"; | |
1506 | return -EINVAL; | |
1507 | } | |
63f33b8d | 1508 | |
33e53f06 | 1509 | rs->md.new_layout = raid10_format_to_md_layout(rs, raid10_format, raid10_copies); |
bd83a4c4 MS |
1510 | if (rs->md.new_layout < 0) { |
1511 | rs->ti->error = "Error getting raid10 format"; | |
1512 | return rs->md.new_layout; | |
1513 | } | |
33e53f06 HM |
1514 | |
1515 | rt = get_raid_type_by_ll(10, rs->md.new_layout); | |
bd83a4c4 MS |
1516 | if (!rt) { |
1517 | rs->ti->error = "Failed to recognize new raid10 layout"; | |
1518 | return -EINVAL; | |
1519 | } | |
33e53f06 HM |
1520 | |
1521 | if ((rt->algorithm == ALGORITHM_RAID10_DEFAULT || | |
1522 | rt->algorithm == ALGORITHM_RAID10_NEAR) && | |
4286325b | 1523 | test_bit(__CTR_FLAG_RAID10_USE_NEAR_SETS, &rs->ctr_flags)) { |
bd83a4c4 MS |
1524 | rs->ti->error = "RAID10 format 'near' and 'raid10_use_near_sets' are incompatible"; |
1525 | return -EINVAL; | |
1526 | } | |
bd83a4c4 | 1527 | } |
702108d1 | 1528 | |
33e53f06 | 1529 | rs->raid10_copies = raid10_copies; |
c039c332 | 1530 | |
9d09e663 N |
1531 | /* Assume there are no metadata devices until the drives are parsed */ |
1532 | rs->md.persistent = 0; | |
1533 | rs->md.external = 1; | |
1534 | ||
f090279e | 1535 | /* Check, if any invalid ctr arguments have been passed in for the raid level */ |
a30cbc0d | 1536 | return rs_check_for_valid_flags(rs); |
9d09e663 N |
1537 | } |
1538 | ||
9dbd1aa3 HM |
1539 | /* Set raid4/5/6 cache size */ |
1540 | static int rs_set_raid456_stripe_cache(struct raid_set *rs) | |
1541 | { | |
1542 | int r; | |
1543 | struct r5conf *conf; | |
1544 | struct mddev *mddev = &rs->md; | |
1545 | uint32_t min_stripes = max(mddev->chunk_sectors, mddev->new_chunk_sectors) / 2; | |
1546 | uint32_t nr_stripes = rs->stripe_cache_entries; | |
1547 | ||
1548 | if (!rt_is_raid456(rs->raid_type)) { | |
1549 | rs->ti->error = "Inappropriate raid level; cannot change stripe_cache size"; | |
1550 | return -EINVAL; | |
1551 | } | |
1552 | ||
1553 | if (nr_stripes < min_stripes) { | |
1554 | DMINFO("Adjusting requested %u stripe cache entries to %u to suit stripe size", | |
1555 | nr_stripes, min_stripes); | |
1556 | nr_stripes = min_stripes; | |
1557 | } | |
1558 | ||
1559 | conf = mddev->private; | |
1560 | if (!conf) { | |
1561 | rs->ti->error = "Cannot change stripe_cache size on inactive RAID set"; | |
1562 | return -EINVAL; | |
1563 | } | |
1564 | ||
1565 | /* Try setting number of stripes in raid456 stripe cache */ | |
1566 | if (conf->min_nr_stripes != nr_stripes) { | |
1567 | r = raid5_set_cache_size(mddev, nr_stripes); | |
1568 | if (r) { | |
1569 | rs->ti->error = "Failed to set raid4/5/6 stripe cache size"; | |
1570 | return r; | |
1571 | } | |
1572 | ||
1573 | DMINFO("%u stripe cache entries", nr_stripes); | |
1574 | } | |
1575 | ||
1576 | return 0; | |
1577 | } | |
1578 | ||
3a1c1ef2 HM |
1579 | /* Return # of data stripes as kept in mddev as of @rs (i.e. as of superblock) */ |
1580 | static unsigned int mddev_data_stripes(struct raid_set *rs) | |
1581 | { | |
1582 | return rs->md.raid_disks - rs->raid_type->parity_devs; | |
1583 | } | |
1584 | ||
40ba37e5 HM |
1585 | /* Return # of data stripes of @rs (i.e. as of ctr) */ |
1586 | static unsigned int rs_data_stripes(struct raid_set *rs) | |
1587 | { | |
1588 | return rs->raid_disks - rs->raid_type->parity_devs; | |
1589 | } | |
1590 | ||
50c4feb9 HM |
1591 | /* |
1592 | * Retrieve rdev->sectors from any valid raid device of @rs | |
1593 | * to allow userpace to pass in arbitray "- -" device tupples. | |
1594 | */ | |
1595 | static sector_t __rdev_sectors(struct raid_set *rs) | |
1596 | { | |
1597 | int i; | |
1598 | ||
332bd077 | 1599 | for (i = 0; i < rs->raid_disks; i++) { |
50c4feb9 HM |
1600 | struct md_rdev *rdev = &rs->dev[i].rdev; |
1601 | ||
63c32ed4 HM |
1602 | if (!test_bit(Journal, &rdev->flags) && |
1603 | rdev->bdev && rdev->sectors) | |
50c4feb9 HM |
1604 | return rdev->sectors; |
1605 | } | |
1606 | ||
4d49f1b4 | 1607 | return 0; |
50c4feb9 HM |
1608 | } |
1609 | ||
188a212d HM |
1610 | /* Check that calculated dev_sectors fits all component devices. */ |
1611 | static int _check_data_dev_sectors(struct raid_set *rs) | |
1612 | { | |
1613 | sector_t ds = ~0; | |
1614 | struct md_rdev *rdev; | |
1615 | ||
1616 | rdev_for_each(rdev, &rs->md) | |
1617 | if (!test_bit(Journal, &rdev->flags) && rdev->bdev) { | |
6dcbb52c | 1618 | ds = min(ds, bdev_nr_sectors(rdev->bdev)); |
188a212d HM |
1619 | if (ds < rs->md.dev_sectors) { |
1620 | rs->ti->error = "Component device(s) too small"; | |
1621 | return -EINVAL; | |
1622 | } | |
1623 | } | |
1624 | ||
1625 | return 0; | |
1626 | } | |
1627 | ||
40ba37e5 | 1628 | /* Calculate the sectors per device and per array used for @rs */ |
22c992e1 | 1629 | static int rs_set_dev_and_array_sectors(struct raid_set *rs, sector_t sectors, bool use_mddev) |
40ba37e5 HM |
1630 | { |
1631 | int delta_disks; | |
1632 | unsigned int data_stripes; | |
22c992e1 | 1633 | sector_t array_sectors = sectors, dev_sectors = sectors; |
40ba37e5 | 1634 | struct mddev *mddev = &rs->md; |
40ba37e5 HM |
1635 | |
1636 | if (use_mddev) { | |
1637 | delta_disks = mddev->delta_disks; | |
1638 | data_stripes = mddev_data_stripes(rs); | |
1639 | } else { | |
1640 | delta_disks = rs->delta_disks; | |
1641 | data_stripes = rs_data_stripes(rs); | |
1642 | } | |
1643 | ||
1644 | /* Special raid1 case w/o delta_disks support (yet) */ | |
1645 | if (rt_is_raid1(rs->raid_type)) | |
1646 | ; | |
1647 | else if (rt_is_raid10(rs->raid_type)) { | |
1648 | if (rs->raid10_copies < 2 || | |
1649 | delta_disks < 0) { | |
1650 | rs->ti->error = "Bogus raid10 data copies or delta disks"; | |
094f394d | 1651 | return -EINVAL; |
40ba37e5 HM |
1652 | } |
1653 | ||
1654 | dev_sectors *= rs->raid10_copies; | |
1655 | if (sector_div(dev_sectors, data_stripes)) | |
1656 | goto bad; | |
1657 | ||
1658 | array_sectors = (data_stripes + delta_disks) * dev_sectors; | |
1659 | if (sector_div(array_sectors, rs->raid10_copies)) | |
1660 | goto bad; | |
1661 | ||
1662 | } else if (sector_div(dev_sectors, data_stripes)) | |
1663 | goto bad; | |
1664 | ||
1665 | else | |
1666 | /* Striped layouts */ | |
1667 | array_sectors = (data_stripes + delta_disks) * dev_sectors; | |
1668 | ||
40ba37e5 HM |
1669 | mddev->array_sectors = array_sectors; |
1670 | mddev->dev_sectors = dev_sectors; | |
22c992e1 | 1671 | rs_set_rdev_sectors(rs); |
40ba37e5 | 1672 | |
188a212d | 1673 | return _check_data_dev_sectors(rs); |
40ba37e5 HM |
1674 | bad: |
1675 | rs->ti->error = "Target length not divisible by number of data devices"; | |
094f394d | 1676 | return -EINVAL; |
40ba37e5 HM |
1677 | } |
1678 | ||
4dff2f1e | 1679 | /* Setup recovery on @rs */ |
f9f3ee91 | 1680 | static void rs_setup_recovery(struct raid_set *rs, sector_t dev_sectors) |
4dff2f1e HM |
1681 | { |
1682 | /* raid0 does not recover */ | |
1683 | if (rs_is_raid0(rs)) | |
1684 | rs->md.recovery_cp = MaxSector; | |
1685 | /* | |
1686 | * A raid6 set has to be recovered either | |
1687 | * completely or for the grown part to | |
1688 | * ensure proper parity and Q-Syndrome | |
1689 | */ | |
1690 | else if (rs_is_raid6(rs)) | |
1691 | rs->md.recovery_cp = dev_sectors; | |
1692 | /* | |
1693 | * Other raid set types may skip recovery | |
1694 | * depending on the 'nosync' flag. | |
1695 | */ | |
1696 | else | |
1697 | rs->md.recovery_cp = test_bit(__CTR_FLAG_NOSYNC, &rs->ctr_flags) | |
1698 | ? MaxSector : dev_sectors; | |
1699 | } | |
1700 | ||
9d09e663 N |
1701 | static void do_table_event(struct work_struct *ws) |
1702 | { | |
1703 | struct raid_set *rs = container_of(ws, struct raid_set, md.event_work); | |
1704 | ||
9d9d939c | 1705 | smp_rmb(); /* Make sure we access most actual mddev properties */ |
61e06e2c HM |
1706 | if (!rs_is_reshaping(rs)) { |
1707 | if (rs_is_raid10(rs)) | |
1708 | rs_set_rdev_sectors(rs); | |
9d9d939c | 1709 | rs_set_capacity(rs); |
61e06e2c | 1710 | } |
9d09e663 N |
1711 | dm_table_event(rs->ti->table); |
1712 | } | |
1713 | ||
ecbfb9f1 HM |
1714 | /* |
1715 | * Make sure a valid takover (level switch) is being requested on @rs | |
1716 | * | |
1717 | * Conversions of raid sets from one MD personality to another | |
1718 | * have to conform to restrictions which are enforced here. | |
ecbfb9f1 HM |
1719 | */ |
1720 | static int rs_check_takeover(struct raid_set *rs) | |
1721 | { | |
1722 | struct mddev *mddev = &rs->md; | |
1723 | unsigned int near_copies; | |
1724 | ||
9dbd1aa3 HM |
1725 | if (rs->md.degraded) { |
1726 | rs->ti->error = "Can't takeover degraded raid set"; | |
1727 | return -EPERM; | |
1728 | } | |
1729 | ||
1730 | if (rs_is_reshaping(rs)) { | |
1731 | rs->ti->error = "Can't takeover reshaping raid set"; | |
1732 | return -EPERM; | |
1733 | } | |
1734 | ||
ecbfb9f1 HM |
1735 | switch (mddev->level) { |
1736 | case 0: | |
1737 | /* raid0 -> raid1/5 with one disk */ | |
1738 | if ((mddev->new_level == 1 || mddev->new_level == 5) && | |
1739 | mddev->raid_disks == 1) | |
1740 | return 0; | |
1741 | ||
1742 | /* raid0 -> raid10 */ | |
1743 | if (mddev->new_level == 10 && | |
9dbd1aa3 | 1744 | !(rs->raid_disks % mddev->raid_disks)) |
ecbfb9f1 HM |
1745 | return 0; |
1746 | ||
1747 | /* raid0 with multiple disks -> raid4/5/6 */ | |
bb91a63f | 1748 | if (__within_range(mddev->new_level, 4, 6) && |
ecbfb9f1 HM |
1749 | mddev->new_layout == ALGORITHM_PARITY_N && |
1750 | mddev->raid_disks > 1) | |
1751 | return 0; | |
1752 | ||
1753 | break; | |
1754 | ||
1755 | case 10: | |
1756 | /* Can't takeover raid10_offset! */ | |
e6ca5e1a | 1757 | if (__is_raid10_offset(mddev->layout)) |
ecbfb9f1 HM |
1758 | break; |
1759 | ||
e6ca5e1a | 1760 | near_copies = __raid10_near_copies(mddev->layout); |
ecbfb9f1 HM |
1761 | |
1762 | /* raid10* -> raid0 */ | |
1763 | if (mddev->new_level == 0) { | |
1764 | /* Can takeover raid10_near with raid disks divisable by data copies! */ | |
1765 | if (near_copies > 1 && | |
1766 | !(mddev->raid_disks % near_copies)) { | |
1767 | mddev->raid_disks /= near_copies; | |
1768 | mddev->delta_disks = mddev->raid_disks; | |
1769 | return 0; | |
1770 | } | |
1771 | ||
1772 | /* Can takeover raid10_far */ | |
1773 | if (near_copies == 1 && | |
e6ca5e1a | 1774 | __raid10_far_copies(mddev->layout) > 1) |
ecbfb9f1 HM |
1775 | return 0; |
1776 | ||
1777 | break; | |
1778 | } | |
1779 | ||
1780 | /* raid10_{near,far} -> raid1 */ | |
1781 | if (mddev->new_level == 1 && | |
e6ca5e1a | 1782 | max(near_copies, __raid10_far_copies(mddev->layout)) == mddev->raid_disks) |
ecbfb9f1 HM |
1783 | return 0; |
1784 | ||
1785 | /* raid10_{near,far} with 2 disks -> raid4/5 */ | |
bb91a63f | 1786 | if (__within_range(mddev->new_level, 4, 5) && |
ecbfb9f1 HM |
1787 | mddev->raid_disks == 2) |
1788 | return 0; | |
1789 | break; | |
1790 | ||
1791 | case 1: | |
1792 | /* raid1 with 2 disks -> raid4/5 */ | |
bb91a63f | 1793 | if (__within_range(mddev->new_level, 4, 5) && |
ecbfb9f1 HM |
1794 | mddev->raid_disks == 2) { |
1795 | mddev->degraded = 1; | |
1796 | return 0; | |
1797 | } | |
1798 | ||
1799 | /* raid1 -> raid0 */ | |
1800 | if (mddev->new_level == 0 && | |
1801 | mddev->raid_disks == 1) | |
1802 | return 0; | |
1803 | ||
1804 | /* raid1 -> raid10 */ | |
1805 | if (mddev->new_level == 10) | |
1806 | return 0; | |
ecbfb9f1 HM |
1807 | break; |
1808 | ||
1809 | case 4: | |
1810 | /* raid4 -> raid0 */ | |
1811 | if (mddev->new_level == 0) | |
1812 | return 0; | |
1813 | ||
1814 | /* raid4 -> raid1/5 with 2 disks */ | |
1815 | if ((mddev->new_level == 1 || mddev->new_level == 5) && | |
1816 | mddev->raid_disks == 2) | |
1817 | return 0; | |
1818 | ||
1819 | /* raid4 -> raid5/6 with parity N */ | |
bb91a63f | 1820 | if (__within_range(mddev->new_level, 5, 6) && |
ecbfb9f1 HM |
1821 | mddev->layout == ALGORITHM_PARITY_N) |
1822 | return 0; | |
1823 | break; | |
1824 | ||
1825 | case 5: | |
1826 | /* raid5 with parity N -> raid0 */ | |
1827 | if (mddev->new_level == 0 && | |
1828 | mddev->layout == ALGORITHM_PARITY_N) | |
1829 | return 0; | |
1830 | ||
1831 | /* raid5 with parity N -> raid4 */ | |
1832 | if (mddev->new_level == 4 && | |
1833 | mddev->layout == ALGORITHM_PARITY_N) | |
1834 | return 0; | |
1835 | ||
1836 | /* raid5 with 2 disks -> raid1/4/10 */ | |
1837 | if ((mddev->new_level == 1 || mddev->new_level == 4 || mddev->new_level == 10) && | |
1838 | mddev->raid_disks == 2) | |
1839 | return 0; | |
1840 | ||
6ee0bae9 | 1841 | /* raid5_* -> raid6_*_6 with Q-Syndrome N (e.g. raid5_ra -> raid6_ra_6 */ |
ecbfb9f1 HM |
1842 | if (mddev->new_level == 6 && |
1843 | ((mddev->layout == ALGORITHM_PARITY_N && mddev->new_layout == ALGORITHM_PARITY_N) || | |
bb91a63f | 1844 | __within_range(mddev->new_layout, ALGORITHM_LEFT_ASYMMETRIC_6, ALGORITHM_RIGHT_SYMMETRIC_6))) |
ecbfb9f1 HM |
1845 | return 0; |
1846 | break; | |
1847 | ||
1848 | case 6: | |
1849 | /* raid6 with parity N -> raid0 */ | |
1850 | if (mddev->new_level == 0 && | |
1851 | mddev->layout == ALGORITHM_PARITY_N) | |
1852 | return 0; | |
1853 | ||
1854 | /* raid6 with parity N -> raid4 */ | |
1855 | if (mddev->new_level == 4 && | |
1856 | mddev->layout == ALGORITHM_PARITY_N) | |
1857 | return 0; | |
1858 | ||
6ee0bae9 | 1859 | /* raid6_*_n with Q-Syndrome N -> raid5_* */ |
ecbfb9f1 HM |
1860 | if (mddev->new_level == 5 && |
1861 | ((mddev->layout == ALGORITHM_PARITY_N && mddev->new_layout == ALGORITHM_PARITY_N) || | |
bb91a63f | 1862 | __within_range(mddev->new_layout, ALGORITHM_LEFT_ASYMMETRIC, ALGORITHM_RIGHT_SYMMETRIC))) |
ecbfb9f1 | 1863 | return 0; |
be962b2f | 1864 | break; |
ecbfb9f1 HM |
1865 | |
1866 | default: | |
1867 | break; | |
1868 | } | |
1869 | ||
bd83a4c4 MS |
1870 | rs->ti->error = "takeover not possible"; |
1871 | return -EINVAL; | |
ecbfb9f1 HM |
1872 | } |
1873 | ||
1874 | /* True if @rs requested to be taken over */ | |
1875 | static bool rs_takeover_requested(struct raid_set *rs) | |
1876 | { | |
1877 | return rs->md.new_level != rs->md.level; | |
1878 | } | |
1879 | ||
f99a8e43 HM |
1880 | /* True if layout is set to reshape. */ |
1881 | static bool rs_is_layout_change(struct raid_set *rs, bool use_mddev) | |
1882 | { | |
1883 | return (use_mddev ? rs->md.delta_disks : rs->delta_disks) || | |
1884 | rs->md.new_layout != rs->md.layout || | |
1885 | rs->md.new_chunk_sectors != rs->md.chunk_sectors; | |
1886 | } | |
1887 | ||
40ba37e5 HM |
1888 | /* True if @rs is requested to reshape by ctr */ |
1889 | static bool rs_reshape_requested(struct raid_set *rs) | |
1890 | { | |
469b304b | 1891 | bool change; |
40ba37e5 HM |
1892 | struct mddev *mddev = &rs->md; |
1893 | ||
469b304b HM |
1894 | if (rs_takeover_requested(rs)) |
1895 | return false; | |
1896 | ||
552aa679 | 1897 | if (rs_is_raid0(rs)) |
40ba37e5 HM |
1898 | return false; |
1899 | ||
f99a8e43 | 1900 | change = rs_is_layout_change(rs, false); |
469b304b HM |
1901 | |
1902 | /* Historical case to support raid1 reshape without delta disks */ | |
552aa679 | 1903 | if (rs_is_raid1(rs)) { |
7a7c330f HM |
1904 | if (rs->delta_disks) |
1905 | return !!rs->delta_disks; | |
1906 | ||
469b304b HM |
1907 | return !change && |
1908 | mddev->raid_disks != rs->raid_disks; | |
7a7c330f | 1909 | } |
469b304b | 1910 | |
552aa679 | 1911 | if (rs_is_raid10(rs)) |
469b304b HM |
1912 | return change && |
1913 | !__is_raid10_far(mddev->new_layout) && | |
1914 | rs->delta_disks >= 0; | |
1915 | ||
1916 | return change; | |
40ba37e5 HM |
1917 | } |
1918 | ||
33e53f06 | 1919 | /* Features */ |
9b6e5423 | 1920 | #define FEATURE_FLAG_SUPPORTS_V190 0x1 /* Supports extended superblock */ |
33e53f06 HM |
1921 | |
1922 | /* State flags for sb->flags */ | |
1923 | #define SB_FLAG_RESHAPE_ACTIVE 0x1 | |
1924 | #define SB_FLAG_RESHAPE_BACKWARDS 0x2 | |
1925 | ||
b12d437b JB |
1926 | /* |
1927 | * This structure is never routinely used by userspace, unlike md superblocks. | |
1928 | * Devices with this superblock should only ever be accessed via device-mapper. | |
1929 | */ | |
1930 | #define DM_RAID_MAGIC 0x64526D44 | |
1931 | struct dm_raid_superblock { | |
1932 | __le32 magic; /* "DmRd" */ | |
9b6e5423 | 1933 | __le32 compat_features; /* Used to indicate compatible features (like 1.9.0 ondisk metadata extension) */ |
b12d437b | 1934 | |
33e53f06 HM |
1935 | __le32 num_devices; /* Number of devices in this raid set. (Max 64) */ |
1936 | __le32 array_position; /* The position of this drive in the raid set */ | |
b12d437b JB |
1937 | |
1938 | __le64 events; /* Incremented by md when superblock updated */ | |
9b6e5423 | 1939 | __le64 failed_devices; /* Pre 1.9.0 part of bit field of devices to */ |
33e53f06 | 1940 | /* indicate failures (see extension below) */ |
b12d437b JB |
1941 | |
1942 | /* | |
1943 | * This offset tracks the progress of the repair or replacement of | |
1944 | * an individual drive. | |
1945 | */ | |
1946 | __le64 disk_recovery_offset; | |
1947 | ||
1948 | /* | |
33e53f06 | 1949 | * This offset tracks the progress of the initial raid set |
b12d437b JB |
1950 | * synchronisation/parity calculation. |
1951 | */ | |
1952 | __le64 array_resync_offset; | |
1953 | ||
1954 | /* | |
33e53f06 | 1955 | * raid characteristics |
b12d437b JB |
1956 | */ |
1957 | __le32 level; | |
1958 | __le32 layout; | |
1959 | __le32 stripe_sectors; | |
1960 | ||
33e53f06 | 1961 | /******************************************************************** |
9b6e5423 | 1962 | * BELOW FOLLOW V1.9.0 EXTENSIONS TO THE PRISTINE SUPERBLOCK FORMAT!!! |
33e53f06 | 1963 | * |
c4d097d1 | 1964 | * FEATURE_FLAG_SUPPORTS_V190 in the compat_features member indicates that those exist |
33e53f06 HM |
1965 | */ |
1966 | ||
1967 | __le32 flags; /* Flags defining array states for reshaping */ | |
1968 | ||
1969 | /* | |
1970 | * This offset tracks the progress of a raid | |
1971 | * set reshape in order to be able to restart it | |
1972 | */ | |
1973 | __le64 reshape_position; | |
1974 | ||
1975 | /* | |
1976 | * These define the properties of the array in case of an interrupted reshape | |
1977 | */ | |
1978 | __le32 new_level; | |
1979 | __le32 new_layout; | |
1980 | __le32 new_stripe_sectors; | |
1981 | __le32 delta_disks; | |
1982 | ||
1983 | __le64 array_sectors; /* Array size in sectors */ | |
1984 | ||
1985 | /* | |
1986 | * Sector offsets to data on devices (reshaping). | |
1987 | * Needed to support out of place reshaping, thus | |
1988 | * not writing over any stripes whilst converting | |
1989 | * them from old to new layout | |
1990 | */ | |
1991 | __le64 data_offset; | |
1992 | __le64 new_data_offset; | |
1993 | ||
1994 | __le64 sectors; /* Used device size in sectors */ | |
1995 | ||
1996 | /* | |
efdd3c33 | 1997 | * Additional Bit field of devices indicating failures to support |
9b6e5423 | 1998 | * up to 256 devices with the 1.9.0 on-disk metadata format |
33e53f06 HM |
1999 | */ |
2000 | __le64 extended_failed_devices[DISKS_ARRAY_ELEMS - 1]; | |
2001 | ||
2002 | __le32 incompat_features; /* Used to indicate any incompatible features */ | |
2003 | ||
2004 | /* Always set rest up to logical block size to 0 when writing (see get_metadata_device() below). */ | |
b12d437b JB |
2005 | } __packed; |
2006 | ||
9dbd1aa3 HM |
2007 | /* |
2008 | * Check for reshape constraints on raid set @rs: | |
2009 | * | |
2010 | * - reshape function non-existent | |
2011 | * - degraded set | |
2012 | * - ongoing recovery | |
2013 | * - ongoing reshape | |
2014 | * | |
2015 | * Returns 0 if none or -EPERM if given constraint | |
2016 | * and error message reference in @errmsg | |
2017 | */ | |
2018 | static int rs_check_reshape(struct raid_set *rs) | |
2019 | { | |
2020 | struct mddev *mddev = &rs->md; | |
2021 | ||
9dbd1aa3 HM |
2022 | if (!mddev->pers || !mddev->pers->check_reshape) |
2023 | rs->ti->error = "Reshape not supported"; | |
2024 | else if (mddev->degraded) | |
2025 | rs->ti->error = "Can't reshape degraded raid set"; | |
2026 | else if (rs_is_recovering(rs)) | |
2027 | rs->ti->error = "Convert request on recovering raid set prohibited"; | |
469b304b | 2028 | else if (rs_is_reshaping(rs)) |
9dbd1aa3 | 2029 | rs->ti->error = "raid set already reshaping!"; |
7a7c330f HM |
2030 | else if (!(rs_is_raid1(rs) || rs_is_raid10(rs) || rs_is_raid456(rs))) |
2031 | rs->ti->error = "Reshaping only supported for raid1/4/5/6/10"; | |
9dbd1aa3 HM |
2032 | else |
2033 | return 0; | |
2034 | ||
2035 | return -EPERM; | |
2036 | } | |
2037 | ||
e2568465 | 2038 | static int read_disk_sb(struct md_rdev *rdev, int size, bool force_reload) |
b12d437b JB |
2039 | { |
2040 | BUG_ON(!rdev->sb_page); | |
2041 | ||
e2568465 | 2042 | if (rdev->sb_loaded && !force_reload) |
b12d437b JB |
2043 | return 0; |
2044 | ||
e2568465 HM |
2045 | rdev->sb_loaded = 0; |
2046 | ||
4ce4c73f | 2047 | if (!sync_page_io(rdev, 0, size, rdev->sb_page, REQ_OP_READ, true)) { |
0447568f JB |
2048 | DMERR("Failed to read superblock of device at position %d", |
2049 | rdev->raid_disk); | |
c32fb9e7 | 2050 | md_error(rdev->mddev, rdev); |
e2568465 HM |
2051 | set_bit(Faulty, &rdev->flags); |
2052 | return -EIO; | |
b12d437b JB |
2053 | } |
2054 | ||
2055 | rdev->sb_loaded = 1; | |
2056 | ||
2057 | return 0; | |
2058 | } | |
2059 | ||
33e53f06 HM |
2060 | static void sb_retrieve_failed_devices(struct dm_raid_superblock *sb, uint64_t *failed_devices) |
2061 | { | |
2062 | failed_devices[0] = le64_to_cpu(sb->failed_devices); | |
2063 | memset(failed_devices + 1, 0, sizeof(sb->extended_failed_devices)); | |
2064 | ||
4286325b | 2065 | if (le32_to_cpu(sb->compat_features) & FEATURE_FLAG_SUPPORTS_V190) { |
33e53f06 HM |
2066 | int i = ARRAY_SIZE(sb->extended_failed_devices); |
2067 | ||
2068 | while (i--) | |
2069 | failed_devices[i+1] = le64_to_cpu(sb->extended_failed_devices[i]); | |
2070 | } | |
2071 | } | |
2072 | ||
7b34df74 HM |
2073 | static void sb_update_failed_devices(struct dm_raid_superblock *sb, uint64_t *failed_devices) |
2074 | { | |
2075 | int i = ARRAY_SIZE(sb->extended_failed_devices); | |
2076 | ||
2077 | sb->failed_devices = cpu_to_le64(failed_devices[0]); | |
2078 | while (i--) | |
2079 | sb->extended_failed_devices[i] = cpu_to_le64(failed_devices[i+1]); | |
2080 | } | |
2081 | ||
2082 | /* | |
2083 | * Synchronize the superblock members with the raid set properties | |
2084 | * | |
2085 | * All superblock data is little endian. | |
2086 | */ | |
fd01b88c | 2087 | static void super_sync(struct mddev *mddev, struct md_rdev *rdev) |
b12d437b | 2088 | { |
7b34df74 HM |
2089 | bool update_failed_devices = false; |
2090 | unsigned int i; | |
2091 | uint64_t failed_devices[DISKS_ARRAY_ELEMS]; | |
b12d437b | 2092 | struct dm_raid_superblock *sb; |
81f382f9 | 2093 | struct raid_set *rs = container_of(mddev, struct raid_set, md); |
b12d437b | 2094 | |
7b34df74 HM |
2095 | /* No metadata device, no superblock */ |
2096 | if (!rdev->meta_bdev) | |
2097 | return; | |
2098 | ||
2099 | BUG_ON(!rdev->sb_page); | |
2100 | ||
b12d437b | 2101 | sb = page_address(rdev->sb_page); |
b12d437b | 2102 | |
7b34df74 | 2103 | sb_retrieve_failed_devices(sb, failed_devices); |
b12d437b | 2104 | |
7b34df74 HM |
2105 | for (i = 0; i < rs->raid_disks; i++) |
2106 | if (!rs->dev[i].data_dev || test_bit(Faulty, &rs->dev[i].rdev.flags)) { | |
2107 | update_failed_devices = true; | |
2108 | set_bit(i, (void *) failed_devices); | |
2109 | } | |
2110 | ||
2111 | if (update_failed_devices) | |
2112 | sb_update_failed_devices(sb, failed_devices); | |
b12d437b JB |
2113 | |
2114 | sb->magic = cpu_to_le32(DM_RAID_MAGIC); | |
9b6e5423 | 2115 | sb->compat_features = cpu_to_le32(FEATURE_FLAG_SUPPORTS_V190); |
b12d437b JB |
2116 | |
2117 | sb->num_devices = cpu_to_le32(mddev->raid_disks); | |
2118 | sb->array_position = cpu_to_le32(rdev->raid_disk); | |
2119 | ||
2120 | sb->events = cpu_to_le64(mddev->events); | |
b12d437b JB |
2121 | |
2122 | sb->disk_recovery_offset = cpu_to_le64(rdev->recovery_offset); | |
2123 | sb->array_resync_offset = cpu_to_le64(mddev->recovery_cp); | |
2124 | ||
2125 | sb->level = cpu_to_le32(mddev->level); | |
2126 | sb->layout = cpu_to_le32(mddev->layout); | |
2127 | sb->stripe_sectors = cpu_to_le32(mddev->chunk_sectors); | |
7b34df74 | 2128 | |
c4d097d1 HM |
2129 | /******************************************************************** |
2130 | * BELOW FOLLOW V1.9.0 EXTENSIONS TO THE PRISTINE SUPERBLOCK FORMAT!!! | |
2131 | * | |
2132 | * FEATURE_FLAG_SUPPORTS_V190 in the compat_features member indicates that those exist | |
2133 | */ | |
7b34df74 HM |
2134 | sb->new_level = cpu_to_le32(mddev->new_level); |
2135 | sb->new_layout = cpu_to_le32(mddev->new_layout); | |
2136 | sb->new_stripe_sectors = cpu_to_le32(mddev->new_chunk_sectors); | |
2137 | ||
2138 | sb->delta_disks = cpu_to_le32(mddev->delta_disks); | |
2139 | ||
2140 | smp_rmb(); /* Make sure we access most recent reshape position */ | |
2141 | sb->reshape_position = cpu_to_le64(mddev->reshape_position); | |
2142 | if (le64_to_cpu(sb->reshape_position) != MaxSector) { | |
2143 | /* Flag ongoing reshape */ | |
2144 | sb->flags |= cpu_to_le32(SB_FLAG_RESHAPE_ACTIVE); | |
2145 | ||
2146 | if (mddev->delta_disks < 0 || mddev->reshape_backwards) | |
2147 | sb->flags |= cpu_to_le32(SB_FLAG_RESHAPE_BACKWARDS); | |
4286325b MS |
2148 | } else { |
2149 | /* Clear reshape flags */ | |
2150 | sb->flags &= ~(cpu_to_le32(SB_FLAG_RESHAPE_ACTIVE|SB_FLAG_RESHAPE_BACKWARDS)); | |
2151 | } | |
7b34df74 HM |
2152 | |
2153 | sb->array_sectors = cpu_to_le64(mddev->array_sectors); | |
2154 | sb->data_offset = cpu_to_le64(rdev->data_offset); | |
2155 | sb->new_data_offset = cpu_to_le64(rdev->new_data_offset); | |
2156 | sb->sectors = cpu_to_le64(rdev->sectors); | |
b2a4872a | 2157 | sb->incompat_features = cpu_to_le32(0); |
7b34df74 HM |
2158 | |
2159 | /* Zero out the rest of the payload after the size of the superblock */ | |
2160 | memset(sb + 1, 0, rdev->sb_size - sizeof(*sb)); | |
b12d437b JB |
2161 | } |
2162 | ||
2163 | /* | |
2164 | * super_load | |
2165 | * | |
2166 | * This function creates a superblock if one is not found on the device | |
2167 | * and will decide which superblock to use if there's a choice. | |
2168 | * | |
2169 | * Return: 1 if use rdev, 0 if use refdev, -Exxx otherwise | |
2170 | */ | |
3cb03002 | 2171 | static int super_load(struct md_rdev *rdev, struct md_rdev *refdev) |
b12d437b | 2172 | { |
73c6f239 | 2173 | int r; |
b12d437b JB |
2174 | struct dm_raid_superblock *sb; |
2175 | struct dm_raid_superblock *refsb; | |
2176 | uint64_t events_sb, events_refsb; | |
2177 | ||
e2568465 | 2178 | r = read_disk_sb(rdev, rdev->sb_size, false); |
73c6f239 HM |
2179 | if (r) |
2180 | return r; | |
b12d437b JB |
2181 | |
2182 | sb = page_address(rdev->sb_page); | |
3aa3b2b2 JB |
2183 | |
2184 | /* | |
2185 | * Two cases that we want to write new superblocks and rebuild: | |
2186 | * 1) New device (no matching magic number) | |
2187 | * 2) Device specified for rebuild (!In_sync w/ offset == 0) | |
2188 | */ | |
2189 | if ((sb->magic != cpu_to_le32(DM_RAID_MAGIC)) || | |
2190 | (!test_bit(In_sync, &rdev->flags) && !rdev->recovery_offset)) { | |
b12d437b JB |
2191 | super_sync(rdev->mddev, rdev); |
2192 | ||
2193 | set_bit(FirstUse, &rdev->flags); | |
9b6e5423 | 2194 | sb->compat_features = cpu_to_le32(FEATURE_FLAG_SUPPORTS_V190); |
b12d437b JB |
2195 | |
2196 | /* Force writing of superblocks to disk */ | |
2953079c | 2197 | set_bit(MD_SB_CHANGE_DEVS, &rdev->mddev->sb_flags); |
b12d437b JB |
2198 | |
2199 | /* Any superblock is better than none, choose that if given */ | |
2200 | return refdev ? 0 : 1; | |
2201 | } | |
2202 | ||
2203 | if (!refdev) | |
2204 | return 1; | |
2205 | ||
2206 | events_sb = le64_to_cpu(sb->events); | |
2207 | ||
2208 | refsb = page_address(refdev->sb_page); | |
2209 | events_refsb = le64_to_cpu(refsb->events); | |
2210 | ||
2211 | return (events_sb > events_refsb) ? 1 : 0; | |
2212 | } | |
2213 | ||
33e53f06 | 2214 | static int super_init_validation(struct raid_set *rs, struct md_rdev *rdev) |
b12d437b JB |
2215 | { |
2216 | int role; | |
33e53f06 | 2217 | struct mddev *mddev = &rs->md; |
b12d437b | 2218 | uint64_t events_sb; |
33e53f06 | 2219 | uint64_t failed_devices[DISKS_ARRAY_ELEMS]; |
b12d437b | 2220 | struct dm_raid_superblock *sb; |
33e53f06 | 2221 | uint32_t new_devs = 0, rebuild_and_new = 0, rebuilds = 0; |
dafb20fa | 2222 | struct md_rdev *r; |
b12d437b JB |
2223 | struct dm_raid_superblock *sb2; |
2224 | ||
2225 | sb = page_address(rdev->sb_page); | |
2226 | events_sb = le64_to_cpu(sb->events); | |
b12d437b JB |
2227 | |
2228 | /* | |
2229 | * Initialise to 1 if this is a new superblock. | |
2230 | */ | |
2231 | mddev->events = events_sb ? : 1; | |
2232 | ||
33e53f06 HM |
2233 | mddev->reshape_position = MaxSector; |
2234 | ||
453c2a89 HM |
2235 | mddev->raid_disks = le32_to_cpu(sb->num_devices); |
2236 | mddev->level = le32_to_cpu(sb->level); | |
2237 | mddev->layout = le32_to_cpu(sb->layout); | |
2238 | mddev->chunk_sectors = le32_to_cpu(sb->stripe_sectors); | |
2239 | ||
b12d437b | 2240 | /* |
33e53f06 HM |
2241 | * Reshaping is supported, e.g. reshape_position is valid |
2242 | * in superblock and superblock content is authoritative. | |
b12d437b | 2243 | */ |
4286325b | 2244 | if (le32_to_cpu(sb->compat_features) & FEATURE_FLAG_SUPPORTS_V190) { |
33e53f06 | 2245 | /* Superblock is authoritative wrt given raid set layout! */ |
33e53f06 HM |
2246 | mddev->new_level = le32_to_cpu(sb->new_level); |
2247 | mddev->new_layout = le32_to_cpu(sb->new_layout); | |
2248 | mddev->new_chunk_sectors = le32_to_cpu(sb->new_stripe_sectors); | |
2249 | mddev->delta_disks = le32_to_cpu(sb->delta_disks); | |
2250 | mddev->array_sectors = le64_to_cpu(sb->array_sectors); | |
2251 | ||
2252 | /* raid was reshaping and got interrupted */ | |
4286325b MS |
2253 | if (le32_to_cpu(sb->flags) & SB_FLAG_RESHAPE_ACTIVE) { |
2254 | if (test_bit(__CTR_FLAG_DELTA_DISKS, &rs->ctr_flags)) { | |
33e53f06 HM |
2255 | DMERR("Reshape requested but raid set is still reshaping"); |
2256 | return -EINVAL; | |
2257 | } | |
b12d437b | 2258 | |
33e53f06 | 2259 | if (mddev->delta_disks < 0 || |
4286325b | 2260 | (!mddev->delta_disks && (le32_to_cpu(sb->flags) & SB_FLAG_RESHAPE_BACKWARDS))) |
33e53f06 HM |
2261 | mddev->reshape_backwards = 1; |
2262 | else | |
2263 | mddev->reshape_backwards = 0; | |
2264 | ||
2265 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); | |
2266 | rs->raid_type = get_raid_type_by_ll(mddev->level, mddev->layout); | |
2267 | } | |
2268 | ||
2269 | } else { | |
2270 | /* | |
9b6e5423 | 2271 | * No takeover/reshaping, because we don't have the extended v1.9.0 metadata |
33e53f06 | 2272 | */ |
453c2a89 HM |
2273 | struct raid_type *rt_cur = get_raid_type_by_ll(mddev->level, mddev->layout); |
2274 | struct raid_type *rt_new = get_raid_type_by_ll(mddev->new_level, mddev->new_layout); | |
33e53f06 | 2275 | |
453c2a89 HM |
2276 | if (rs_takeover_requested(rs)) { |
2277 | if (rt_cur && rt_new) | |
2278 | DMERR("Takeover raid sets from %s to %s not yet supported by metadata. (raid level change)", | |
2279 | rt_cur->name, rt_new->name); | |
2280 | else | |
2281 | DMERR("Takeover raid sets not yet supported by metadata. (raid level change)"); | |
2282 | return -EINVAL; | |
2283 | } else if (rs_reshape_requested(rs)) { | |
2284 | DMERR("Reshaping raid sets not yet supported by metadata. (raid layout change keeping level)"); | |
2285 | if (mddev->layout != mddev->new_layout) { | |
2286 | if (rt_cur && rt_new) | |
2287 | DMERR(" current layout %s vs new layout %s", | |
2288 | rt_cur->name, rt_new->name); | |
2289 | else | |
2290 | DMERR(" current layout 0x%X vs new layout 0x%X", | |
2291 | le32_to_cpu(sb->layout), mddev->new_layout); | |
2292 | } | |
2293 | if (mddev->chunk_sectors != mddev->new_chunk_sectors) | |
2294 | DMERR(" current stripe sectors %u vs new stripe sectors %u", | |
2295 | mddev->chunk_sectors, mddev->new_chunk_sectors); | |
2296 | if (rs->delta_disks) | |
2297 | DMERR(" current %u disks vs new %u disks", | |
2298 | mddev->raid_disks, mddev->raid_disks + rs->delta_disks); | |
2299 | if (rs_is_raid10(rs)) { | |
2300 | DMERR(" Old layout: %s w/ %u copies", | |
2301 | raid10_md_layout_to_format(mddev->layout), | |
2302 | raid10_md_layout_to_copies(mddev->layout)); | |
2303 | DMERR(" New layout: %s w/ %u copies", | |
2304 | raid10_md_layout_to_format(mddev->new_layout), | |
2305 | raid10_md_layout_to_copies(mddev->new_layout)); | |
2306 | } | |
33e53f06 HM |
2307 | return -EINVAL; |
2308 | } | |
2309 | ||
b052b07c | 2310 | DMINFO("Discovered old metadata format; upgrading to extended metadata format"); |
b12d437b JB |
2311 | } |
2312 | ||
4286325b | 2313 | if (!test_bit(__CTR_FLAG_NOSYNC, &rs->ctr_flags)) |
b12d437b JB |
2314 | mddev->recovery_cp = le64_to_cpu(sb->array_resync_offset); |
2315 | ||
2316 | /* | |
2317 | * During load, we set FirstUse if a new superblock was written. | |
2318 | * There are two reasons we might not have a superblock: | |
33e53f06 | 2319 | * 1) The raid set is brand new - in which case, all of the |
43157840 | 2320 | * devices must have their In_sync bit set. Also, |
b12d437b | 2321 | * recovery_cp must be 0, unless forced. |
33e53f06 | 2322 | * 2) This is a new device being added to an old raid set |
b12d437b JB |
2323 | * and the new device needs to be rebuilt - in which |
2324 | * case the In_sync bit will /not/ be set and | |
2325 | * recovery_cp must be MaxSector. | |
9dbd1aa3 HM |
2326 | * 3) This is/are a new device(s) being added to an old |
2327 | * raid set during takeover to a higher raid level | |
2328 | * to provide capacity for redundancy or during reshape | |
2329 | * to add capacity to grow the raid set. | |
b12d437b | 2330 | */ |
dafb20fa | 2331 | rdev_for_each(r, mddev) { |
63c32ed4 HM |
2332 | if (test_bit(Journal, &rdev->flags)) |
2333 | continue; | |
2334 | ||
33e53f06 HM |
2335 | if (test_bit(FirstUse, &r->flags)) |
2336 | new_devs++; | |
2337 | ||
b12d437b | 2338 | if (!test_bit(In_sync, &r->flags)) { |
33e53f06 HM |
2339 | DMINFO("Device %d specified for rebuild; clearing superblock", |
2340 | r->raid_disk); | |
b12d437b | 2341 | rebuilds++; |
33e53f06 HM |
2342 | |
2343 | if (test_bit(FirstUse, &r->flags)) | |
2344 | rebuild_and_new++; | |
2345 | } | |
b12d437b JB |
2346 | } |
2347 | ||
33e53f06 HM |
2348 | if (new_devs == rs->raid_disks || !rebuilds) { |
2349 | /* Replace a broken device */ | |
33e53f06 HM |
2350 | if (new_devs == rs->raid_disks) { |
2351 | DMINFO("Superblocks created for new raid set"); | |
b12d437b | 2352 | set_bit(MD_ARRAY_FIRST_USE, &mddev->flags); |
9dbd1aa3 HM |
2353 | } else if (new_devs != rebuilds && |
2354 | new_devs != rs->delta_disks) { | |
33e53f06 HM |
2355 | DMERR("New device injected into existing raid set without " |
2356 | "'delta_disks' or 'rebuild' parameter specified"); | |
b12d437b JB |
2357 | return -EINVAL; |
2358 | } | |
33e53f06 HM |
2359 | } else if (new_devs && new_devs != rebuilds) { |
2360 | DMERR("%u 'rebuild' devices cannot be injected into" | |
2361 | " a raid set with %u other first-time devices", | |
2362 | rebuilds, new_devs); | |
b12d437b | 2363 | return -EINVAL; |
33e53f06 HM |
2364 | } else if (rebuilds) { |
2365 | if (rebuild_and_new && rebuilds != rebuild_and_new) { | |
2366 | DMERR("new device%s provided without 'rebuild'", | |
2367 | new_devs > 1 ? "s" : ""); | |
2368 | return -EINVAL; | |
11e47232 | 2369 | } else if (!test_bit(__CTR_FLAG_REBUILD, &rs->ctr_flags) && rs_is_recovering(rs)) { |
33e53f06 HM |
2370 | DMERR("'rebuild' specified while raid set is not in-sync (recovery_cp=%llu)", |
2371 | (unsigned long long) mddev->recovery_cp); | |
2372 | return -EINVAL; | |
9dbd1aa3 HM |
2373 | } else if (rs_is_reshaping(rs)) { |
2374 | DMERR("'rebuild' specified while raid set is being reshaped (reshape_position=%llu)", | |
2375 | (unsigned long long) mddev->reshape_position); | |
33e53f06 HM |
2376 | return -EINVAL; |
2377 | } | |
b12d437b JB |
2378 | } |
2379 | ||
2380 | /* | |
2381 | * Now we set the Faulty bit for those devices that are | |
2382 | * recorded in the superblock as failed. | |
2383 | */ | |
33e53f06 | 2384 | sb_retrieve_failed_devices(sb, failed_devices); |
dafb20fa | 2385 | rdev_for_each(r, mddev) { |
63c32ed4 HM |
2386 | if (test_bit(Journal, &rdev->flags) || |
2387 | !r->sb_page) | |
b12d437b JB |
2388 | continue; |
2389 | sb2 = page_address(r->sb_page); | |
2390 | sb2->failed_devices = 0; | |
33e53f06 | 2391 | memset(sb2->extended_failed_devices, 0, sizeof(sb2->extended_failed_devices)); |
b12d437b JB |
2392 | |
2393 | /* | |
2394 | * Check for any device re-ordering. | |
2395 | */ | |
2396 | if (!test_bit(FirstUse, &r->flags) && (r->raid_disk >= 0)) { | |
2397 | role = le32_to_cpu(sb2->array_position); | |
33e53f06 HM |
2398 | if (role < 0) |
2399 | continue; | |
2400 | ||
b12d437b | 2401 | if (role != r->raid_disk) { |
453c2a89 | 2402 | if (rs_is_raid10(rs) && __is_raid10_near(mddev->layout)) { |
e6ca5e1a | 2403 | if (mddev->raid_disks % __raid10_near_copies(mddev->layout) || |
bd83a4c4 MS |
2404 | rs->raid_disks % rs->raid10_copies) { |
2405 | rs->ti->error = | |
2406 | "Cannot change raid10 near set to odd # of devices!"; | |
2407 | return -EINVAL; | |
2408 | } | |
33e53f06 HM |
2409 | |
2410 | sb2->array_position = cpu_to_le32(r->raid_disk); | |
2411 | ||
2412 | } else if (!(rs_is_raid10(rs) && rt_is_raid0(rs->raid_type)) && | |
bd83a4c4 MS |
2413 | !(rs_is_raid0(rs) && rt_is_raid10(rs->raid_type)) && |
2414 | !rt_is_raid1(rs->raid_type)) { | |
2415 | rs->ti->error = "Cannot change device positions in raid set"; | |
2416 | return -EINVAL; | |
2417 | } | |
33e53f06 | 2418 | |
bd83a4c4 | 2419 | DMINFO("raid device #%d now at position #%d", role, r->raid_disk); |
b12d437b JB |
2420 | } |
2421 | ||
2422 | /* | |
2423 | * Partial recovery is performed on | |
2424 | * returning failed devices. | |
2425 | */ | |
33e53f06 | 2426 | if (test_bit(role, (void *) failed_devices)) |
b12d437b JB |
2427 | set_bit(Faulty, &r->flags); |
2428 | } | |
2429 | } | |
2430 | ||
2431 | return 0; | |
2432 | } | |
2433 | ||
0cf45031 | 2434 | static int super_validate(struct raid_set *rs, struct md_rdev *rdev) |
b12d437b | 2435 | { |
0cf45031 | 2436 | struct mddev *mddev = &rs->md; |
33e53f06 HM |
2437 | struct dm_raid_superblock *sb; |
2438 | ||
c63ede3b | 2439 | if (rs_is_raid0(rs) || !rdev->sb_page || rdev->raid_disk < 0) |
33e53f06 HM |
2440 | return 0; |
2441 | ||
2442 | sb = page_address(rdev->sb_page); | |
b12d437b JB |
2443 | |
2444 | /* | |
2445 | * If mddev->events is not set, we know we have not yet initialized | |
2446 | * the array. | |
2447 | */ | |
33e53f06 | 2448 | if (!mddev->events && super_init_validation(rs, rdev)) |
b12d437b JB |
2449 | return -EINVAL; |
2450 | ||
5c33677c AW |
2451 | if (le32_to_cpu(sb->compat_features) && |
2452 | le32_to_cpu(sb->compat_features) != FEATURE_FLAG_SUPPORTS_V190) { | |
9b6e5423 MS |
2453 | rs->ti->error = "Unable to assemble array: Unknown flag(s) in compatible feature flags"; |
2454 | return -EINVAL; | |
2455 | } | |
2456 | ||
2457 | if (sb->incompat_features) { | |
ecbfb9f1 | 2458 | rs->ti->error = "Unable to assemble array: No incompatible feature flags supported yet"; |
4c9971ca HM |
2459 | return -EINVAL; |
2460 | } | |
2461 | ||
f9f3ee91 | 2462 | /* Enable bitmap creation on @rs unless no metadevs or raid0 or journaled raid4/5/6 set. */ |
d857ad75 | 2463 | mddev->bitmap_info.offset = (rt_is_raid0(rs->raid_type) || rs->journal_dev.dev) ? 0 : to_sector(4096); |
977f1a0a | 2464 | mddev->bitmap_info.default_offset = mddev->bitmap_info.offset; |
0cf45031 | 2465 | |
33e53f06 | 2466 | if (!test_and_clear_bit(FirstUse, &rdev->flags)) { |
c4d097d1 HM |
2467 | /* |
2468 | * Retrieve rdev size stored in superblock to be prepared for shrink. | |
2469 | * Check extended superblock members are present otherwise the size | |
2470 | * will not be set! | |
2471 | */ | |
2472 | if (le32_to_cpu(sb->compat_features) & FEATURE_FLAG_SUPPORTS_V190) | |
2473 | rdev->sectors = le64_to_cpu(sb->sectors); | |
2474 | ||
b12d437b | 2475 | rdev->recovery_offset = le64_to_cpu(sb->disk_recovery_offset); |
33e53f06 HM |
2476 | if (rdev->recovery_offset == MaxSector) |
2477 | set_bit(In_sync, &rdev->flags); | |
2478 | /* | |
2479 | * If no reshape in progress -> we're recovering single | |
2480 | * disk(s) and have to set the device(s) to out-of-sync | |
2481 | */ | |
9dbd1aa3 | 2482 | else if (!rs_is_reshaping(rs)) |
33e53f06 | 2483 | clear_bit(In_sync, &rdev->flags); /* Mandatory for recovery */ |
b12d437b JB |
2484 | } |
2485 | ||
2486 | /* | |
2487 | * If a device comes back, set it as not In_sync and no longer faulty. | |
2488 | */ | |
33e53f06 HM |
2489 | if (test_and_clear_bit(Faulty, &rdev->flags)) { |
2490 | rdev->recovery_offset = 0; | |
b12d437b JB |
2491 | clear_bit(In_sync, &rdev->flags); |
2492 | rdev->saved_raid_disk = rdev->raid_disk; | |
b12d437b JB |
2493 | } |
2494 | ||
33e53f06 HM |
2495 | /* Reshape support -> restore repective data offsets */ |
2496 | rdev->data_offset = le64_to_cpu(sb->data_offset); | |
2497 | rdev->new_data_offset = le64_to_cpu(sb->new_data_offset); | |
b12d437b JB |
2498 | |
2499 | return 0; | |
2500 | } | |
2501 | ||
2502 | /* | |
2503 | * Analyse superblocks and select the freshest. | |
2504 | */ | |
2505 | static int analyse_superblocks(struct dm_target *ti, struct raid_set *rs) | |
2506 | { | |
73c6f239 | 2507 | int r; |
c63ede3b | 2508 | struct md_rdev *rdev, *freshest; |
fd01b88c | 2509 | struct mddev *mddev = &rs->md; |
b12d437b JB |
2510 | |
2511 | freshest = NULL; | |
c63ede3b | 2512 | rdev_for_each(rdev, mddev) { |
63c32ed4 HM |
2513 | if (test_bit(Journal, &rdev->flags)) |
2514 | continue; | |
2515 | ||
23397844 HM |
2516 | if (!rdev->meta_bdev) |
2517 | continue; | |
2518 | ||
2519 | /* Set superblock offset/size for metadata device. */ | |
2520 | rdev->sb_start = 0; | |
2521 | rdev->sb_size = bdev_logical_block_size(rdev->meta_bdev); | |
2522 | if (rdev->sb_size < sizeof(struct dm_raid_superblock) || rdev->sb_size > PAGE_SIZE) { | |
2523 | DMERR("superblock size of a logical block is no longer valid"); | |
2524 | return -EINVAL; | |
2525 | } | |
2526 | ||
761becff | 2527 | /* |
c76d53f4 | 2528 | * Skipping super_load due to CTR_FLAG_SYNC will cause |
761becff | 2529 | * the array to undergo initialization again as |
43157840 | 2530 | * though it were new. This is the intended effect |
761becff JB |
2531 | * of the "sync" directive. |
2532 | * | |
c63ede3b | 2533 | * With reshaping capability added, we must ensure that |
cea44663 | 2534 | * the "sync" directive is disallowed during the reshape. |
761becff | 2535 | */ |
4286325b | 2536 | if (test_bit(__CTR_FLAG_SYNC, &rs->ctr_flags)) |
761becff JB |
2537 | continue; |
2538 | ||
73c6f239 | 2539 | r = super_load(rdev, freshest); |
b12d437b | 2540 | |
73c6f239 | 2541 | switch (r) { |
b12d437b JB |
2542 | case 1: |
2543 | freshest = rdev; | |
2544 | break; | |
2545 | case 0: | |
2546 | break; | |
2547 | default: | |
c63ede3b | 2548 | /* This is a failure to read the superblock from the metadata device. */ |
9e7d9367 HM |
2549 | /* |
2550 | * We have to keep any raid0 data/metadata device pairs or | |
2551 | * the MD raid0 personality will fail to start the array. | |
2552 | */ | |
2553 | if (rs_is_raid0(rs)) | |
2554 | continue; | |
2555 | ||
55ebbb59 | 2556 | /* |
c63ede3b HM |
2557 | * We keep the dm_devs to be able to emit the device tuple |
2558 | * properly on the table line in raid_status() (rather than | |
2559 | * mistakenly acting as if '- -' got passed into the constructor). | |
2560 | * | |
2561 | * The rdev has to stay on the same_set list to allow for | |
2562 | * the attempt to restore faulty devices on second resume. | |
55ebbb59 | 2563 | */ |
c63ede3b HM |
2564 | rdev->raid_disk = rdev->saved_raid_disk = -1; |
2565 | break; | |
b12d437b JB |
2566 | } |
2567 | } | |
2568 | ||
2569 | if (!freshest) | |
2570 | return 0; | |
2571 | ||
2572 | /* | |
2573 | * Validation of the freshest device provides the source of | |
2574 | * validation for the remaining devices. | |
2575 | */ | |
9dbd1aa3 HM |
2576 | rs->ti->error = "Unable to assemble array: Invalid superblocks"; |
2577 | if (super_validate(rs, freshest)) | |
bd83a4c4 | 2578 | return -EINVAL; |
b12d437b | 2579 | |
f4af3f82 HM |
2580 | if (validate_raid_redundancy(rs)) { |
2581 | rs->ti->error = "Insufficient redundancy to activate array"; | |
2582 | return -EINVAL; | |
2583 | } | |
2584 | ||
dafb20fa | 2585 | rdev_for_each(rdev, mddev) |
63c32ed4 HM |
2586 | if (!test_bit(Journal, &rdev->flags) && |
2587 | rdev != freshest && | |
2588 | super_validate(rs, rdev)) | |
b12d437b | 2589 | return -EINVAL; |
b12d437b JB |
2590 | return 0; |
2591 | } | |
2592 | ||
40ba37e5 HM |
2593 | /* |
2594 | * Adjust data_offset and new_data_offset on all disk members of @rs | |
96fccdce | 2595 | * for out of place reshaping if requested by constructor |
40ba37e5 HM |
2596 | * |
2597 | * We need free space at the beginning of each raid disk for forward | |
2598 | * and at the end for backward reshapes which userspace has to provide | |
2599 | * via remapping/reordering of space. | |
2600 | */ | |
2601 | static int rs_adjust_data_offsets(struct raid_set *rs) | |
2602 | { | |
2603 | sector_t data_offset = 0, new_data_offset = 0; | |
2604 | struct md_rdev *rdev; | |
2605 | ||
2606 | /* Constructor did not request data offset change */ | |
2607 | if (!test_bit(__CTR_FLAG_DATA_OFFSET, &rs->ctr_flags)) { | |
2608 | if (!rs_is_reshapable(rs)) | |
2609 | goto out; | |
2610 | ||
2611 | return 0; | |
2612 | } | |
2613 | ||
5380c05b | 2614 | /* HM FIXME: get In_Sync raid_dev? */ |
40ba37e5 HM |
2615 | rdev = &rs->dev[0].rdev; |
2616 | ||
2617 | if (rs->delta_disks < 0) { | |
2618 | /* | |
2619 | * Removing disks (reshaping backwards): | |
2620 | * | |
2621 | * - before reshape: data is at offset 0 and free space | |
2622 | * is at end of each component LV | |
2623 | * | |
2624 | * - after reshape: data is at offset rs->data_offset != 0 on each component LV | |
2625 | */ | |
2626 | data_offset = 0; | |
2627 | new_data_offset = rs->data_offset; | |
2628 | ||
2629 | } else if (rs->delta_disks > 0) { | |
2630 | /* | |
2631 | * Adding disks (reshaping forwards): | |
2632 | * | |
2633 | * - before reshape: data is at offset rs->data_offset != 0 and | |
2634 | * free space is at begin of each component LV | |
2635 | * | |
2636 | * - after reshape: data is at offset 0 on each component LV | |
2637 | */ | |
2638 | data_offset = rs->data_offset; | |
2639 | new_data_offset = 0; | |
2640 | ||
2641 | } else { | |
2642 | /* | |
2643 | * User space passes in 0 for data offset after having removed reshape space | |
2644 | * | |
2645 | * - or - (data offset != 0) | |
2646 | * | |
2647 | * Changing RAID layout or chunk size -> toggle offsets | |
2648 | * | |
2649 | * - before reshape: data is at offset rs->data_offset 0 and | |
2650 | * free space is at end of each component LV | |
2651 | * -or- | |
2652 | * data is at offset rs->data_offset != 0 and | |
2653 | * free space is at begin of each component LV | |
2654 | * | |
2527b56e HM |
2655 | * - after reshape: data is at offset 0 if it was at offset != 0 |
2656 | * or at offset != 0 if it was at offset 0 | |
40ba37e5 HM |
2657 | * on each component LV |
2658 | * | |
2659 | */ | |
2660 | data_offset = rs->data_offset ? rdev->data_offset : 0; | |
2661 | new_data_offset = data_offset ? 0 : rs->data_offset; | |
2662 | set_bit(RT_FLAG_UPDATE_SBS, &rs->runtime_flags); | |
2663 | } | |
2664 | ||
2665 | /* | |
2666 | * Make sure we got a minimum amount of free sectors per device | |
2667 | */ | |
2668 | if (rs->data_offset && | |
6dcbb52c | 2669 | bdev_nr_sectors(rdev->bdev) - rs->md.dev_sectors < MIN_FREE_RESHAPE_SPACE) { |
40ba37e5 HM |
2670 | rs->ti->error = data_offset ? "No space for forward reshape" : |
2671 | "No space for backward reshape"; | |
2672 | return -ENOSPC; | |
2673 | } | |
2674 | out: | |
052b2b1e HM |
2675 | /* |
2676 | * Raise recovery_cp in case data_offset != 0 to | |
2677 | * avoid false recovery positives in the constructor. | |
2678 | */ | |
2679 | if (rs->md.recovery_cp < rs->md.dev_sectors) | |
2680 | rs->md.recovery_cp += rs->dev[0].rdev.data_offset; | |
2681 | ||
63c32ed4 | 2682 | /* Adjust data offsets on all rdevs but on any raid4/5/6 journal device */ |
40ba37e5 | 2683 | rdev_for_each(rdev, &rs->md) { |
63c32ed4 HM |
2684 | if (!test_bit(Journal, &rdev->flags)) { |
2685 | rdev->data_offset = data_offset; | |
2686 | rdev->new_data_offset = new_data_offset; | |
2687 | } | |
40ba37e5 HM |
2688 | } |
2689 | ||
2690 | return 0; | |
2691 | } | |
2692 | ||
ecbfb9f1 | 2693 | /* Userpace reordered disks -> adjust raid_disk indexes in @rs */ |
e6ca5e1a | 2694 | static void __reorder_raid_disk_indexes(struct raid_set *rs) |
ecbfb9f1 HM |
2695 | { |
2696 | int i = 0; | |
2697 | struct md_rdev *rdev; | |
2698 | ||
2699 | rdev_for_each(rdev, &rs->md) { | |
63c32ed4 HM |
2700 | if (!test_bit(Journal, &rdev->flags)) { |
2701 | rdev->raid_disk = i++; | |
2702 | rdev->saved_raid_disk = rdev->new_raid_disk = -1; | |
2703 | } | |
ecbfb9f1 HM |
2704 | } |
2705 | } | |
2706 | ||
2707 | /* | |
2708 | * Setup @rs for takeover by a different raid level | |
2709 | */ | |
2710 | static int rs_setup_takeover(struct raid_set *rs) | |
2711 | { | |
2712 | struct mddev *mddev = &rs->md; | |
2713 | struct md_rdev *rdev; | |
2714 | unsigned int d = mddev->raid_disks = rs->raid_disks; | |
2715 | sector_t new_data_offset = rs->dev[0].rdev.data_offset ? 0 : rs->data_offset; | |
2716 | ||
2717 | if (rt_is_raid10(rs->raid_type)) { | |
552aa679 | 2718 | if (rs_is_raid0(rs)) { |
ecbfb9f1 | 2719 | /* Userpace reordered disks -> adjust raid_disk indexes */ |
e6ca5e1a | 2720 | __reorder_raid_disk_indexes(rs); |
ecbfb9f1 HM |
2721 | |
2722 | /* raid0 -> raid10_far layout */ | |
2723 | mddev->layout = raid10_format_to_md_layout(rs, ALGORITHM_RAID10_FAR, | |
2724 | rs->raid10_copies); | |
552aa679 | 2725 | } else if (rs_is_raid1(rs)) |
ecbfb9f1 HM |
2726 | /* raid1 -> raid10_near layout */ |
2727 | mddev->layout = raid10_format_to_md_layout(rs, ALGORITHM_RAID10_NEAR, | |
2728 | rs->raid_disks); | |
094f394d | 2729 | else |
ecbfb9f1 HM |
2730 | return -EINVAL; |
2731 | ||
2732 | } | |
2733 | ||
2734 | clear_bit(MD_ARRAY_FIRST_USE, &mddev->flags); | |
2735 | mddev->recovery_cp = MaxSector; | |
2736 | ||
2737 | while (d--) { | |
2738 | rdev = &rs->dev[d].rdev; | |
2739 | ||
2740 | if (test_bit(d, (void *) rs->rebuild_disks)) { | |
2741 | clear_bit(In_sync, &rdev->flags); | |
2742 | clear_bit(Faulty, &rdev->flags); | |
2743 | mddev->recovery_cp = rdev->recovery_offset = 0; | |
2744 | /* Bitmap has to be created when we do an "up" takeover */ | |
2745 | set_bit(MD_ARRAY_FIRST_USE, &mddev->flags); | |
2746 | } | |
2747 | ||
2748 | rdev->new_data_offset = new_data_offset; | |
2749 | } | |
2750 | ||
ecbfb9f1 HM |
2751 | return 0; |
2752 | } | |
2753 | ||
469b304b HM |
2754 | /* Prepare @rs for reshape */ |
2755 | static int rs_prepare_reshape(struct raid_set *rs) | |
2756 | { | |
2757 | bool reshape; | |
2758 | struct mddev *mddev = &rs->md; | |
2759 | ||
2760 | if (rs_is_raid10(rs)) { | |
2761 | if (rs->raid_disks != mddev->raid_disks && | |
2762 | __is_raid10_near(mddev->layout) && | |
2763 | rs->raid10_copies && | |
2764 | rs->raid10_copies != __raid10_near_copies(mddev->layout)) { | |
2765 | /* | |
2766 | * raid disk have to be multiple of data copies to allow this conversion, | |
2767 | * | |
2768 | * This is actually not a reshape it is a | |
2769 | * rebuild of any additional mirrors per group | |
2770 | */ | |
2771 | if (rs->raid_disks % rs->raid10_copies) { | |
2772 | rs->ti->error = "Can't reshape raid10 mirror groups"; | |
2773 | return -EINVAL; | |
2774 | } | |
2775 | ||
2776 | /* Userpace reordered disks to add/remove mirrors -> adjust raid_disk indexes */ | |
2777 | __reorder_raid_disk_indexes(rs); | |
2778 | mddev->layout = raid10_format_to_md_layout(rs, ALGORITHM_RAID10_NEAR, | |
2779 | rs->raid10_copies); | |
2780 | mddev->new_layout = mddev->layout; | |
2781 | reshape = false; | |
2782 | } else | |
2783 | reshape = true; | |
2784 | ||
2785 | } else if (rs_is_raid456(rs)) | |
2786 | reshape = true; | |
2787 | ||
469b304b | 2788 | else if (rs_is_raid1(rs)) { |
7a7c330f HM |
2789 | if (rs->delta_disks) { |
2790 | /* Process raid1 via delta_disks */ | |
2791 | mddev->degraded = rs->delta_disks < 0 ? -rs->delta_disks : rs->delta_disks; | |
2792 | reshape = true; | |
2793 | } else { | |
2794 | /* Process raid1 without delta_disks */ | |
2795 | mddev->raid_disks = rs->raid_disks; | |
7a7c330f HM |
2796 | reshape = false; |
2797 | } | |
469b304b HM |
2798 | } else { |
2799 | rs->ti->error = "Called with bogus raid type"; | |
2800 | return -EINVAL; | |
2801 | } | |
2802 | ||
2803 | if (reshape) { | |
2804 | set_bit(RT_FLAG_RESHAPE_RS, &rs->runtime_flags); | |
2805 | set_bit(RT_FLAG_UPDATE_SBS, &rs->runtime_flags); | |
7a7c330f HM |
2806 | } else if (mddev->raid_disks < rs->raid_disks) |
2807 | /* Create new superblocks and bitmaps, if any new disks */ | |
469b304b | 2808 | set_bit(RT_FLAG_UPDATE_SBS, &rs->runtime_flags); |
469b304b HM |
2809 | |
2810 | return 0; | |
2811 | } | |
2812 | ||
052b2b1e HM |
2813 | /* Get reshape sectors from data_offsets or raid set */ |
2814 | static sector_t _get_reshape_sectors(struct raid_set *rs) | |
2815 | { | |
2816 | struct md_rdev *rdev; | |
2817 | sector_t reshape_sectors = 0; | |
2818 | ||
2819 | rdev_for_each(rdev, &rs->md) | |
2820 | if (!test_bit(Journal, &rdev->flags)) { | |
2821 | reshape_sectors = (rdev->data_offset > rdev->new_data_offset) ? | |
2822 | rdev->data_offset - rdev->new_data_offset : | |
2823 | rdev->new_data_offset - rdev->data_offset; | |
2824 | break; | |
2825 | } | |
2826 | ||
2827 | return max(reshape_sectors, (sector_t) rs->data_offset); | |
2828 | } | |
2829 | ||
9dbd1aa3 | 2830 | /* |
f99a8e43 | 2831 | * Reshape: |
9dbd1aa3 HM |
2832 | * - change raid layout |
2833 | * - change chunk size | |
2834 | * - add disks | |
2835 | * - remove disks | |
2836 | */ | |
2837 | static int rs_setup_reshape(struct raid_set *rs) | |
2838 | { | |
2839 | int r = 0; | |
2840 | unsigned int cur_raid_devs, d; | |
052b2b1e | 2841 | sector_t reshape_sectors = _get_reshape_sectors(rs); |
9dbd1aa3 HM |
2842 | struct mddev *mddev = &rs->md; |
2843 | struct md_rdev *rdev; | |
2844 | ||
2845 | mddev->delta_disks = rs->delta_disks; | |
2846 | cur_raid_devs = mddev->raid_disks; | |
2847 | ||
2848 | /* Ignore impossible layout change whilst adding/removing disks */ | |
2849 | if (mddev->delta_disks && | |
2850 | mddev->layout != mddev->new_layout) { | |
2851 | DMINFO("Ignoring invalid layout change with delta_disks=%d", rs->delta_disks); | |
2852 | mddev->new_layout = mddev->layout; | |
2853 | } | |
2854 | ||
2855 | /* | |
2856 | * Adjust array size: | |
2857 | * | |
052b2b1e | 2858 | * - in case of adding disk(s), array size has |
9dbd1aa3 | 2859 | * to grow after the disk adding reshape, |
efdd3c33 | 2860 | * which'll happen in the event handler; |
9dbd1aa3 HM |
2861 | * reshape will happen forward, so space has to |
2862 | * be available at the beginning of each disk | |
2863 | * | |
052b2b1e | 2864 | * - in case of removing disk(s), array size |
9dbd1aa3 HM |
2865 | * has to shrink before starting the reshape, |
2866 | * which'll happen here; | |
2867 | * reshape will happen backward, so space has to | |
2868 | * be available at the end of each disk | |
2869 | * | |
2870 | * - data_offset and new_data_offset are | |
ae3c6cff | 2871 | * adjusted for aforementioned out of place |
9dbd1aa3 HM |
2872 | * reshaping based on userspace passing in |
2873 | * the "data_offset <sectors>" key/value | |
ae3c6cff | 2874 | * pair via the constructor |
9dbd1aa3 HM |
2875 | */ |
2876 | ||
2877 | /* Add disk(s) */ | |
2878 | if (rs->delta_disks > 0) { | |
2879 | /* Prepare disks for check in raid4/5/6/10 {check|start}_reshape */ | |
2880 | for (d = cur_raid_devs; d < rs->raid_disks; d++) { | |
2881 | rdev = &rs->dev[d].rdev; | |
2882 | clear_bit(In_sync, &rdev->flags); | |
2883 | ||
2884 | /* | |
2885 | * save_raid_disk needs to be -1, or recovery_offset will be set to 0 | |
2886 | * by md, which'll store that erroneously in the superblock on reshape | |
2887 | */ | |
2888 | rdev->saved_raid_disk = -1; | |
2889 | rdev->raid_disk = d; | |
2890 | ||
2891 | rdev->sectors = mddev->dev_sectors; | |
7a7c330f | 2892 | rdev->recovery_offset = rs_is_raid1(rs) ? 0 : MaxSector; |
9dbd1aa3 HM |
2893 | } |
2894 | ||
052b2b1e | 2895 | mddev->reshape_backwards = 0; /* adding disk(s) -> forward reshape */ |
9dbd1aa3 HM |
2896 | |
2897 | /* Remove disk(s) */ | |
2898 | } else if (rs->delta_disks < 0) { | |
22c992e1 | 2899 | r = rs_set_dev_and_array_sectors(rs, rs->ti->len, true); |
9dbd1aa3 HM |
2900 | mddev->reshape_backwards = 1; /* removing disk(s) -> backward reshape */ |
2901 | ||
2902 | /* Change layout and/or chunk size */ | |
2903 | } else { | |
2904 | /* | |
2905 | * Reshape layout (e.g. raid5_ls -> raid5_n) and/or chunk size: | |
2906 | * | |
2907 | * keeping number of disks and do layout change -> | |
2908 | * | |
2909 | * toggle reshape_backward depending on data_offset: | |
2910 | * | |
2911 | * - free space upfront -> reshape forward | |
2912 | * | |
2913 | * - free space at the end -> reshape backward | |
2914 | * | |
2915 | * | |
2916 | * This utilizes free reshape space avoiding the need | |
2917 | * for userspace to move (parts of) LV segments in | |
2918 | * case of layout/chunksize change (for disk | |
2919 | * adding/removing reshape space has to be at | |
2920 | * the proper address (see above with delta_disks): | |
2921 | * | |
2922 | * add disk(s) -> begin | |
2923 | * remove disk(s)-> end | |
2924 | */ | |
2925 | mddev->reshape_backwards = rs->dev[0].rdev.data_offset ? 0 : 1; | |
2926 | } | |
2927 | ||
052b2b1e HM |
2928 | /* |
2929 | * Adjust device size for forward reshape | |
2930 | * because md_finish_reshape() reduces it. | |
2931 | */ | |
2932 | if (!mddev->reshape_backwards) | |
2933 | rdev_for_each(rdev, &rs->md) | |
2934 | if (!test_bit(Journal, &rdev->flags)) | |
2935 | rdev->sectors += reshape_sectors; | |
2936 | ||
9dbd1aa3 HM |
2937 | return r; |
2938 | } | |
2939 | ||
f99a8e43 HM |
2940 | /* |
2941 | * If the md resync thread has updated superblock with max reshape position | |
2942 | * at the end of a reshape but not (yet) reset the layout configuration | |
2943 | * changes -> reset the latter. | |
2944 | */ | |
2945 | static void rs_reset_inconclusive_reshape(struct raid_set *rs) | |
2946 | { | |
2947 | if (!rs_is_reshaping(rs) && rs_is_layout_change(rs, true)) { | |
2948 | rs_set_cur(rs); | |
2949 | rs->md.delta_disks = 0; | |
2950 | rs->md.reshape_backwards = 0; | |
2951 | } | |
2952 | } | |
2953 | ||
75b8e04b | 2954 | /* |
48cf06bc HM |
2955 | * Enable/disable discard support on RAID set depending on |
2956 | * RAID level and discard properties of underlying RAID members. | |
75b8e04b | 2957 | */ |
ecbfb9f1 | 2958 | static void configure_discard_support(struct raid_set *rs) |
75b8e04b | 2959 | { |
48cf06bc HM |
2960 | int i; |
2961 | bool raid456; | |
ecbfb9f1 | 2962 | struct dm_target *ti = rs->ti; |
48cf06bc | 2963 | |
48920ff2 CH |
2964 | /* |
2965 | * XXX: RAID level 4,5,6 require zeroing for safety. | |
2966 | */ | |
552aa679 | 2967 | raid456 = rs_is_raid456(rs); |
75b8e04b | 2968 | |
ffeeac75 | 2969 | for (i = 0; i < rs->raid_disks; i++) { |
70200574 CH |
2970 | if (!rs->dev[i].rdev.bdev || |
2971 | !bdev_max_discard_sectors(rs->dev[i].rdev.bdev)) | |
48cf06bc HM |
2972 | return; |
2973 | ||
2974 | if (raid456) { | |
48cf06bc HM |
2975 | if (!devices_handle_discard_safely) { |
2976 | DMERR("raid456 discard support disabled due to discard_zeroes_data uncertainty."); | |
2977 | DMERR("Set dm-raid.devices_handle_discard_safely=Y to override."); | |
2978 | return; | |
2979 | } | |
2980 | } | |
2981 | } | |
2982 | ||
75b8e04b HM |
2983 | ti->num_discard_bios = 1; |
2984 | } | |
2985 | ||
9d09e663 | 2986 | /* |
73c6f239 | 2987 | * Construct a RAID0/1/10/4/5/6 mapping: |
9d09e663 | 2988 | * Args: |
43157840 MS |
2989 | * <raid_type> <#raid_params> <raid_params>{0,} \ |
2990 | * <#raid_devs> [<meta_dev1> <dev1>]{1,} | |
9d09e663 | 2991 | * |
43157840 | 2992 | * <raid_params> varies by <raid_type>. See 'parse_raid_params' for |
9d09e663 | 2993 | * details on possible <raid_params>. |
73c6f239 HM |
2994 | * |
2995 | * Userspace is free to initialize the metadata devices, hence the superblocks to | |
2996 | * enforce recreation based on the passed in table parameters. | |
2997 | * | |
9d09e663 | 2998 | */ |
094f394d | 2999 | static int raid_ctr(struct dm_target *ti, unsigned int argc, char **argv) |
9d09e663 | 3000 | { |
73c6f239 | 3001 | int r; |
7501537e | 3002 | bool resize = false; |
9d09e663 | 3003 | struct raid_type *rt; |
094f394d | 3004 | unsigned int num_raid_params, num_raid_devs; |
99273d9e | 3005 | sector_t sb_array_sectors, rdev_sectors, reshape_sectors; |
9d09e663 | 3006 | struct raid_set *rs = NULL; |
92c83d79 | 3007 | const char *arg; |
9dbd1aa3 | 3008 | struct rs_layout rs_layout; |
92c83d79 HM |
3009 | struct dm_arg_set as = { argc, argv }, as_nrd; |
3010 | struct dm_arg _args[] = { | |
3011 | { 0, as.argc, "Cannot understand number of raid parameters" }, | |
3012 | { 1, 254, "Cannot understand number of raid devices parameters" } | |
3013 | }; | |
3014 | ||
92c83d79 | 3015 | arg = dm_shift_arg(&as); |
bd83a4c4 MS |
3016 | if (!arg) { |
3017 | ti->error = "No arguments"; | |
3018 | return -EINVAL; | |
3019 | } | |
9d09e663 | 3020 | |
92c83d79 | 3021 | rt = get_raid_type(arg); |
bd83a4c4 MS |
3022 | if (!rt) { |
3023 | ti->error = "Unrecognised raid_type"; | |
3024 | return -EINVAL; | |
3025 | } | |
9d09e663 | 3026 | |
92c83d79 HM |
3027 | /* Must have <#raid_params> */ |
3028 | if (dm_read_arg_group(_args, &as, &num_raid_params, &ti->error)) | |
43157840 | 3029 | return -EINVAL; |
9d09e663 | 3030 | |
92c83d79 HM |
3031 | /* number of raid device tupples <meta_dev data_dev> */ |
3032 | as_nrd = as; | |
3033 | dm_consume_args(&as_nrd, num_raid_params); | |
3034 | _args[1].max = (as_nrd.argc - 1) / 2; | |
3035 | if (dm_read_arg(_args + 1, &as_nrd, &num_raid_devs, &ti->error)) | |
43157840 | 3036 | return -EINVAL; |
9d09e663 | 3037 | |
bb91a63f | 3038 | if (!__within_range(num_raid_devs, 1, MAX_RAID_DEVICES)) { |
bd83a4c4 MS |
3039 | ti->error = "Invalid number of supplied raid devices"; |
3040 | return -EINVAL; | |
3041 | } | |
3ca5a21a | 3042 | |
bfcee0e3 | 3043 | rs = raid_set_alloc(ti, rt, num_raid_devs); |
9d09e663 N |
3044 | if (IS_ERR(rs)) |
3045 | return PTR_ERR(rs); | |
3046 | ||
92c83d79 | 3047 | r = parse_raid_params(rs, &as, num_raid_params); |
73c6f239 | 3048 | if (r) |
9d09e663 N |
3049 | goto bad; |
3050 | ||
702108d1 | 3051 | r = parse_dev_params(rs, &as); |
73c6f239 | 3052 | if (r) |
9d09e663 N |
3053 | goto bad; |
3054 | ||
b12d437b | 3055 | rs->md.sync_super = super_sync; |
ecbfb9f1 | 3056 | |
2527b56e HM |
3057 | /* |
3058 | * Calculate ctr requested array and device sizes to allow | |
3059 | * for superblock analysis needing device sizes defined. | |
3060 | * | |
3061 | * Any existing superblock will overwrite the array and device sizes | |
3062 | */ | |
22c992e1 | 3063 | r = rs_set_dev_and_array_sectors(rs, rs->ti->len, false); |
40ba37e5 | 3064 | if (r) |
b1956dc4 | 3065 | goto bad; |
40ba37e5 | 3066 | |
99273d9e HM |
3067 | /* Memorize just calculated, potentially larger sizes to grow the raid set in preresume */ |
3068 | rs->array_sectors = rs->md.array_sectors; | |
3069 | rs->dev_sectors = rs->md.dev_sectors; | |
4dff2f1e | 3070 | |
ecbfb9f1 HM |
3071 | /* |
3072 | * Backup any new raid set level, layout, ... | |
3073 | * requested to be able to compare to superblock | |
3074 | * members for conversion decisions. | |
3075 | */ | |
9dbd1aa3 | 3076 | rs_config_backup(rs, &rs_layout); |
ecbfb9f1 | 3077 | |
73c6f239 HM |
3078 | r = analyse_superblocks(ti, rs); |
3079 | if (r) | |
b12d437b JB |
3080 | goto bad; |
3081 | ||
99273d9e HM |
3082 | /* All in-core metadata now as of current superblocks after calling analyse_superblocks() */ |
3083 | sb_array_sectors = rs->md.array_sectors; | |
4d49f1b4 HM |
3084 | rdev_sectors = __rdev_sectors(rs); |
3085 | if (!rdev_sectors) { | |
3086 | ti->error = "Invalid rdev size"; | |
3087 | r = -EINVAL; | |
3088 | goto bad; | |
3089 | } | |
3090 | ||
7501537e HM |
3091 | |
3092 | reshape_sectors = _get_reshape_sectors(rs); | |
99273d9e HM |
3093 | if (rs->dev_sectors != rdev_sectors) { |
3094 | resize = (rs->dev_sectors != rdev_sectors - reshape_sectors); | |
3095 | if (rs->dev_sectors > rdev_sectors - reshape_sectors) | |
3096 | set_bit(RT_FLAG_RS_GROW, &rs->runtime_flags); | |
3097 | } | |
4dff2f1e | 3098 | |
9d09e663 | 3099 | INIT_WORK(&rs->md.event_work, do_table_event); |
9d09e663 | 3100 | ti->private = rs; |
55a62eef | 3101 | ti->num_flush_bios = 1; |
9dd1cd32 | 3102 | ti->needs_bio_set_dev = true; |
9d09e663 | 3103 | |
ecbfb9f1 | 3104 | /* Restore any requested new layout for conversion decision */ |
9dbd1aa3 | 3105 | rs_config_restore(rs, &rs_layout); |
ecbfb9f1 | 3106 | |
469b304b HM |
3107 | /* |
3108 | * Now that we have any superblock metadata available, | |
3109 | * check for new, recovering, reshaping, to be taken over, | |
3110 | * to be reshaped or an existing, unchanged raid set to | |
3111 | * run in sequence. | |
3112 | */ | |
9dbd1aa3 | 3113 | if (test_bit(MD_ARRAY_FIRST_USE, &rs->md.flags)) { |
2d92a3c2 HM |
3114 | /* A new raid6 set has to be recovered to ensure proper parity and Q-Syndrome */ |
3115 | if (rs_is_raid6(rs) && | |
3116 | test_bit(__CTR_FLAG_NOSYNC, &rs->ctr_flags)) { | |
3117 | ti->error = "'nosync' not allowed for new raid6 set"; | |
b1956dc4 HM |
3118 | r = -EINVAL; |
3119 | goto bad; | |
2d92a3c2 HM |
3120 | } |
3121 | rs_setup_recovery(rs, 0); | |
2a5556c2 HM |
3122 | set_bit(RT_FLAG_UPDATE_SBS, &rs->runtime_flags); |
3123 | rs_set_new(rs); | |
3124 | } else if (rs_is_recovering(rs)) { | |
469b304b | 3125 | /* A recovering raid set may be resized */ |
99273d9e | 3126 | goto size_check; |
2a5556c2 HM |
3127 | } else if (rs_is_reshaping(rs)) { |
3128 | /* Have to reject size change request during reshape */ | |
3129 | if (resize) { | |
3130 | ti->error = "Can't resize a reshaping raid set"; | |
b1956dc4 HM |
3131 | r = -EPERM; |
3132 | goto bad; | |
2d92a3c2 | 3133 | } |
469b304b | 3134 | /* skip setup rs */ |
2d92a3c2 | 3135 | } else if (rs_takeover_requested(rs)) { |
9dbd1aa3 HM |
3136 | if (rs_is_reshaping(rs)) { |
3137 | ti->error = "Can't takeover a reshaping raid set"; | |
b1956dc4 HM |
3138 | r = -EPERM; |
3139 | goto bad; | |
9dbd1aa3 HM |
3140 | } |
3141 | ||
63c32ed4 HM |
3142 | /* We can't takeover a journaled raid4/5/6 */ |
3143 | if (test_bit(__CTR_FLAG_JOURNAL_DEV, &rs->ctr_flags)) { | |
3144 | ti->error = "Can't takeover a journaled raid4/5/6 set"; | |
3145 | r = -EPERM; | |
3146 | goto bad; | |
3147 | } | |
3148 | ||
9dbd1aa3 | 3149 | /* |
2527b56e | 3150 | * If a takeover is needed, userspace sets any additional |
469b304b HM |
3151 | * devices to rebuild and we can check for a valid request here. |
3152 | * | |
efdd3c33 | 3153 | * If acceptable, set the level to the new requested |
2a5556c2 HM |
3154 | * one, prohibit requesting recovery, allow the raid |
3155 | * set to run and store superblocks during resume. | |
9dbd1aa3 | 3156 | */ |
ecbfb9f1 HM |
3157 | r = rs_check_takeover(rs); |
3158 | if (r) | |
b1956dc4 | 3159 | goto bad; |
ecbfb9f1 HM |
3160 | |
3161 | r = rs_setup_takeover(rs); | |
3162 | if (r) | |
b1956dc4 | 3163 | goto bad; |
ecbfb9f1 | 3164 | |
4286325b | 3165 | set_bit(RT_FLAG_UPDATE_SBS, &rs->runtime_flags); |
469b304b | 3166 | /* Takeover ain't recovery, so disable recovery */ |
2a5556c2 | 3167 | rs_setup_recovery(rs, MaxSector); |
3a1c1ef2 | 3168 | rs_set_new(rs); |
40ba37e5 | 3169 | } else if (rs_reshape_requested(rs)) { |
f9f3ee91 | 3170 | /* Only request grow on raid set size extensions, not on reshapes. */ |
99273d9e HM |
3171 | clear_bit(RT_FLAG_RS_GROW, &rs->runtime_flags); |
3172 | ||
63c32ed4 HM |
3173 | /* |
3174 | * No need to check for 'ongoing' takeover here, because takeover | |
3175 | * is an instant operation as oposed to an ongoing reshape. | |
3176 | */ | |
3177 | ||
3178 | /* We can't reshape a journaled raid4/5/6 */ | |
3179 | if (test_bit(__CTR_FLAG_JOURNAL_DEV, &rs->ctr_flags)) { | |
3180 | ti->error = "Can't reshape a journaled raid4/5/6 set"; | |
3181 | r = -EPERM; | |
3182 | goto bad; | |
3183 | } | |
3184 | ||
11e47232 HM |
3185 | /* Out-of-place space has to be available to allow for a reshape unless raid1! */ |
3186 | if (reshape_sectors || rs_is_raid1(rs)) { | |
3187 | /* | |
a4a82ce3 HM |
3188 | * We can only prepare for a reshape here, because the |
3189 | * raid set needs to run to provide the repective reshape | |
3190 | * check functions via its MD personality instance. | |
3191 | * | |
3192 | * So do the reshape check after md_run() succeeded. | |
3193 | */ | |
11e47232 HM |
3194 | r = rs_prepare_reshape(rs); |
3195 | if (r) | |
dc1a3e8e | 3196 | goto bad; |
9dbd1aa3 | 3197 | |
11e47232 HM |
3198 | /* Reshaping ain't recovery, so disable recovery */ |
3199 | rs_setup_recovery(rs, MaxSector); | |
3200 | } | |
3a1c1ef2 | 3201 | rs_set_cur(rs); |
2a5556c2 | 3202 | } else { |
99273d9e | 3203 | size_check: |
2a5556c2 | 3204 | /* May not set recovery when a device rebuild is requested */ |
37f10be1 | 3205 | if (test_bit(__CTR_FLAG_REBUILD, &rs->ctr_flags)) { |
99273d9e | 3206 | clear_bit(RT_FLAG_RS_GROW, &rs->runtime_flags); |
37f10be1 | 3207 | set_bit(RT_FLAG_UPDATE_SBS, &rs->runtime_flags); |
f9f3ee91 | 3208 | rs_setup_recovery(rs, MaxSector); |
99273d9e HM |
3209 | } else if (test_bit(RT_FLAG_RS_GROW, &rs->runtime_flags)) { |
3210 | /* | |
f9f3ee91 HM |
3211 | * Set raid set to current size, i.e. size as of |
3212 | * superblocks to grow to larger size in preresume. | |
99273d9e HM |
3213 | */ |
3214 | r = rs_set_dev_and_array_sectors(rs, sb_array_sectors, false); | |
3215 | if (r) | |
3216 | goto bad; | |
3217 | ||
3218 | rs_setup_recovery(rs, rs->md.recovery_cp < rs->md.dev_sectors ? rs->md.recovery_cp : rs->md.dev_sectors); | |
3219 | } else { | |
3220 | /* This is no size change or it is shrinking, update size and record in superblocks */ | |
3221 | r = rs_set_dev_and_array_sectors(rs, rs->ti->len, false); | |
3222 | if (r) | |
3223 | goto bad; | |
3224 | ||
3225 | if (sb_array_sectors > rs->array_sectors) | |
3226 | set_bit(RT_FLAG_UPDATE_SBS, &rs->runtime_flags); | |
3227 | } | |
2a5556c2 | 3228 | rs_set_cur(rs); |
4dff2f1e | 3229 | } |
ecbfb9f1 | 3230 | |
40ba37e5 HM |
3231 | /* If constructor requested it, change data and new_data offsets */ |
3232 | r = rs_adjust_data_offsets(rs); | |
3233 | if (r) | |
b1956dc4 | 3234 | goto bad; |
40ba37e5 | 3235 | |
f99a8e43 HM |
3236 | /* Catch any inconclusive reshape superblock content. */ |
3237 | rs_reset_inconclusive_reshape(rs); | |
3238 | ||
ecbfb9f1 HM |
3239 | /* Start raid set read-only and assumed clean to change in raid_resume() */ |
3240 | rs->md.ro = 1; | |
3241 | rs->md.in_sync = 1; | |
5380c05b | 3242 | |
f99a8e43 | 3243 | /* Keep array frozen until resume. */ |
ecbfb9f1 | 3244 | set_bit(MD_RECOVERY_FROZEN, &rs->md.recovery); |
75b8e04b | 3245 | |
0cf45031 | 3246 | /* Has to be held on running the array */ |
4eb3327a | 3247 | mddev_suspend_and_lock_nointr(&rs->md); |
73c6f239 | 3248 | r = md_run(&rs->md); |
9d09e663 | 3249 | rs->md.in_sync = 0; /* Assume already marked dirty */ |
73c6f239 | 3250 | if (r) { |
9dbd1aa3 HM |
3251 | ti->error = "Failed to run raid array"; |
3252 | mddev_unlock(&rs->md); | |
9d09e663 N |
3253 | goto bad; |
3254 | } | |
3255 | ||
d5d885fd | 3256 | r = md_start(&rs->md); |
d5d885fd SL |
3257 | if (r) { |
3258 | ti->error = "Failed to start raid array"; | |
e74c874e | 3259 | goto bad_unlock; |
d5d885fd SL |
3260 | } |
3261 | ||
5380c05b | 3262 | /* If raid4/5/6 journal mode explicitly requested (only possible with journal dev) -> set it */ |
6e53636f HM |
3263 | if (test_bit(__CTR_FLAG_JOURNAL_MODE, &rs->ctr_flags)) { |
3264 | r = r5c_journal_mode_set(&rs->md, rs->journal_dev.mode); | |
3265 | if (r) { | |
3266 | ti->error = "Failed to set raid4/5/6 journal mode"; | |
e74c874e | 3267 | goto bad_unlock; |
6e53636f HM |
3268 | } |
3269 | } | |
3270 | ||
0cf352e5 | 3271 | set_bit(RT_FLAG_RS_SUSPENDED, &rs->runtime_flags); |
9dbd1aa3 HM |
3272 | |
3273 | /* Try to adjust the raid4/5/6 stripe cache size to the stripe size */ | |
3274 | if (rs_is_raid456(rs)) { | |
3275 | r = rs_set_raid456_stripe_cache(rs); | |
e74c874e YK |
3276 | if (r) |
3277 | goto bad_unlock; | |
9dbd1aa3 HM |
3278 | } |
3279 | ||
3280 | /* Now do an early reshape check */ | |
3281 | if (test_bit(RT_FLAG_RESHAPE_RS, &rs->runtime_flags)) { | |
3282 | r = rs_check_reshape(rs); | |
e74c874e YK |
3283 | if (r) |
3284 | goto bad_unlock; | |
9dbd1aa3 HM |
3285 | |
3286 | /* Restore new, ctr requested layout to perform check */ | |
3287 | rs_config_restore(rs, &rs_layout); | |
3288 | ||
7a7c330f HM |
3289 | if (rs->md.pers->start_reshape) { |
3290 | r = rs->md.pers->check_reshape(&rs->md); | |
3291 | if (r) { | |
3292 | ti->error = "Reshape check failed"; | |
e74c874e | 3293 | goto bad_unlock; |
7a7c330f | 3294 | } |
9dbd1aa3 HM |
3295 | } |
3296 | } | |
3297 | ||
11e29684 HM |
3298 | /* Disable/enable discard support on raid set. */ |
3299 | configure_discard_support(rs); | |
3300 | ||
9dbd1aa3 | 3301 | mddev_unlock(&rs->md); |
9d09e663 N |
3302 | return 0; |
3303 | ||
e74c874e | 3304 | bad_unlock: |
63f33b8d | 3305 | md_stop(&rs->md); |
7d5fff89 | 3306 | mddev_unlock(&rs->md); |
9d09e663 | 3307 | bad: |
bfcee0e3 | 3308 | raid_set_free(rs); |
9d09e663 | 3309 | |
73c6f239 | 3310 | return r; |
9d09e663 N |
3311 | } |
3312 | ||
3313 | static void raid_dtr(struct dm_target *ti) | |
3314 | { | |
3315 | struct raid_set *rs = ti->private; | |
3316 | ||
7d5fff89 | 3317 | mddev_lock_nointr(&rs->md); |
9d09e663 | 3318 | md_stop(&rs->md); |
7d5fff89 | 3319 | mddev_unlock(&rs->md); |
db29d79b YK |
3320 | |
3321 | if (work_pending(&rs->md.event_work)) | |
3322 | flush_work(&rs->md.event_work); | |
bfcee0e3 | 3323 | raid_set_free(rs); |
9d09e663 N |
3324 | } |
3325 | ||
7de3ee57 | 3326 | static int raid_map(struct dm_target *ti, struct bio *bio) |
9d09e663 N |
3327 | { |
3328 | struct raid_set *rs = ti->private; | |
fd01b88c | 3329 | struct mddev *mddev = &rs->md; |
9d09e663 | 3330 | |
9dbd1aa3 HM |
3331 | /* |
3332 | * If we're reshaping to add disk(s)), ti->len and | |
3333 | * mddev->array_sectors will differ during the process | |
3334 | * (ti->len > mddev->array_sectors), so we have to requeue | |
3335 | * bios with addresses > mddev->array_sectors here or | |
2527b56e | 3336 | * there will occur accesses past EOD of the component |
9dbd1aa3 HM |
3337 | * data images thus erroring the raid set. |
3338 | */ | |
3339 | if (unlikely(bio_end_sector(bio) > mddev->array_sectors)) | |
3340 | return DM_MAPIO_REQUEUE; | |
3341 | ||
c4d6a1b8 | 3342 | md_handle_request(mddev, bio); |
9d09e663 N |
3343 | |
3344 | return DM_MAPIO_SUBMITTED; | |
3345 | } | |
3346 | ||
36a240a7 HM |
3347 | /* Return sync state string for @state */ |
3348 | enum sync_state { st_frozen, st_reshape, st_resync, st_check, st_repair, st_recover, st_idle }; | |
3349 | static const char *sync_str(enum sync_state state) | |
3350 | { | |
3351 | /* Has to be in above sync_state order! */ | |
3352 | static const char *sync_strs[] = { | |
3353 | "frozen", | |
3354 | "reshape", | |
3355 | "resync", | |
3356 | "check", | |
3357 | "repair", | |
3358 | "recover", | |
3359 | "idle" | |
3360 | }; | |
3361 | ||
3362 | return __within_range(state, 0, ARRAY_SIZE(sync_strs) - 1) ? sync_strs[state] : "undef"; | |
3363 | }; | |
3364 | ||
3365 | /* Return enum sync_state for @mddev derived from @recovery flags */ | |
0328ba90 | 3366 | static enum sync_state decipher_sync_action(struct mddev *mddev, unsigned long recovery) |
be83651f | 3367 | { |
67143510 | 3368 | if (test_bit(MD_RECOVERY_FROZEN, &recovery)) |
36a240a7 | 3369 | return st_frozen; |
be83651f | 3370 | |
36a240a7 | 3371 | /* The MD sync thread can be done with io or be interrupted but still be running */ |
4102d9de HM |
3372 | if (!test_bit(MD_RECOVERY_DONE, &recovery) && |
3373 | (test_bit(MD_RECOVERY_RUNNING, &recovery) || | |
3374 | (!mddev->ro && test_bit(MD_RECOVERY_NEEDED, &recovery)))) { | |
67143510 | 3375 | if (test_bit(MD_RECOVERY_RESHAPE, &recovery)) |
36a240a7 | 3376 | return st_reshape; |
be83651f | 3377 | |
67143510 HM |
3378 | if (test_bit(MD_RECOVERY_SYNC, &recovery)) { |
3379 | if (!test_bit(MD_RECOVERY_REQUESTED, &recovery)) | |
36a240a7 HM |
3380 | return st_resync; |
3381 | if (test_bit(MD_RECOVERY_CHECK, &recovery)) | |
3382 | return st_check; | |
3383 | return st_repair; | |
be83651f JB |
3384 | } |
3385 | ||
67143510 | 3386 | if (test_bit(MD_RECOVERY_RECOVER, &recovery)) |
36a240a7 HM |
3387 | return st_recover; |
3388 | ||
3389 | if (mddev->reshape_position != MaxSector) | |
3390 | return st_reshape; | |
be83651f JB |
3391 | } |
3392 | ||
36a240a7 | 3393 | return st_idle; |
be83651f JB |
3394 | } |
3395 | ||
3a1c1ef2 | 3396 | /* |
63c32ed4 | 3397 | * Return status string for @rdev |
3a1c1ef2 HM |
3398 | * |
3399 | * Status characters: | |
3400 | * | |
63c32ed4 | 3401 | * 'D' = Dead/Failed raid set component or raid4/5/6 journal device |
6e53636f HM |
3402 | * 'a' = Alive but not in-sync raid set component _or_ alive raid4/5/6 'write_back' journal device |
3403 | * 'A' = Alive and in-sync raid set component _or_ alive raid4/5/6 'write_through' journal device | |
c63ede3b | 3404 | * '-' = Non-existing device (i.e. uspace passed '- -' into the ctr) |
3a1c1ef2 | 3405 | */ |
242ea5ad | 3406 | static const char *__raid_dev_status(struct raid_set *rs, struct md_rdev *rdev) |
9d09e663 | 3407 | { |
c63ede3b HM |
3408 | if (!rdev->bdev) |
3409 | return "-"; | |
3410 | else if (test_bit(Faulty, &rdev->flags)) | |
3a1c1ef2 | 3411 | return "D"; |
63c32ed4 | 3412 | else if (test_bit(Journal, &rdev->flags)) |
6e53636f | 3413 | return (rs->journal_dev.mode == R5C_JOURNAL_MODE_WRITE_THROUGH) ? "A" : "a"; |
4102d9de HM |
3414 | else if (test_bit(RT_FLAG_RS_RESYNCING, &rs->runtime_flags) || |
3415 | (!test_bit(RT_FLAG_RS_IN_SYNC, &rs->runtime_flags) && | |
3416 | !test_bit(In_sync, &rdev->flags))) | |
3a1c1ef2 HM |
3417 | return "a"; |
3418 | else | |
3419 | return "A"; | |
3420 | } | |
9d09e663 | 3421 | |
242ea5ad | 3422 | /* Helper to return resync/reshape progress for @rs and runtime flags for raid set in sync / resynching */ |
67143510 | 3423 | static sector_t rs_get_progress(struct raid_set *rs, unsigned long recovery, |
53be73a5 | 3424 | enum sync_state state, sector_t resync_max_sectors) |
3a1c1ef2 | 3425 | { |
4102d9de | 3426 | sector_t r; |
3a1c1ef2 | 3427 | struct mddev *mddev = &rs->md; |
9d09e663 | 3428 | |
242ea5ad | 3429 | clear_bit(RT_FLAG_RS_IN_SYNC, &rs->runtime_flags); |
4102d9de | 3430 | clear_bit(RT_FLAG_RS_RESYNCING, &rs->runtime_flags); |
3a1c1ef2 HM |
3431 | |
3432 | if (rs_is_raid0(rs)) { | |
3433 | r = resync_max_sectors; | |
242ea5ad | 3434 | set_bit(RT_FLAG_RS_IN_SYNC, &rs->runtime_flags); |
3a1c1ef2 HM |
3435 | |
3436 | } else { | |
36a240a7 | 3437 | if (state == st_idle && !test_bit(MD_RECOVERY_INTR, &recovery)) |
41dcf197 | 3438 | r = mddev->recovery_cp; |
36a240a7 HM |
3439 | else |
3440 | r = mddev->curr_resync_completed; | |
3a1c1ef2 | 3441 | |
36a240a7 | 3442 | if (state == st_idle && r >= resync_max_sectors) { |
3a1c1ef2 HM |
3443 | /* |
3444 | * Sync complete. | |
3445 | */ | |
4102d9de HM |
3446 | /* In case we have finished recovering, the array is in sync. */ |
3447 | if (test_bit(MD_RECOVERY_RECOVER, &recovery)) | |
3448 | set_bit(RT_FLAG_RS_IN_SYNC, &rs->runtime_flags); | |
3449 | ||
36a240a7 | 3450 | } else if (state == st_recover) |
4102d9de HM |
3451 | /* |
3452 | * In case we are recovering, the array is not in sync | |
3453 | * and health chars should show the recovering legs. | |
53be73a5 HM |
3454 | * |
3455 | * Already retrieved recovery offset from curr_resync_completed above. | |
4102d9de HM |
3456 | */ |
3457 | ; | |
53be73a5 HM |
3458 | |
3459 | else if (state == st_resync || state == st_reshape) | |
dc15b943 | 3460 | /* |
53be73a5 | 3461 | * If "resync/reshape" is occurring, the raid set |
dc15b943 HM |
3462 | * is or may be out of sync hence the health |
3463 | * characters shall be 'a'. | |
3464 | */ | |
3465 | set_bit(RT_FLAG_RS_RESYNCING, &rs->runtime_flags); | |
3466 | ||
36a240a7 | 3467 | else if (state == st_check || state == st_repair) |
3a1c1ef2 HM |
3468 | /* |
3469 | * If "check" or "repair" is occurring, the raid set has | |
3470 | * undergone an initial sync and the health characters | |
3471 | * should not be 'a' anymore. | |
3472 | */ | |
242ea5ad | 3473 | set_bit(RT_FLAG_RS_IN_SYNC, &rs->runtime_flags); |
4102d9de | 3474 | |
53be73a5 | 3475 | else if (test_bit(MD_RECOVERY_NEEDED, &recovery)) |
4102d9de HM |
3476 | /* |
3477 | * We are idle and recovery is needed, prevent 'A' chars race | |
36a240a7 | 3478 | * caused by components still set to in-sync by constructor. |
4102d9de | 3479 | */ |
53be73a5 | 3480 | set_bit(RT_FLAG_RS_RESYNCING, &rs->runtime_flags); |
4102d9de | 3481 | |
53be73a5 | 3482 | else { |
3a1c1ef2 | 3483 | /* |
53be73a5 HM |
3484 | * We are idle and the raid set may be doing an initial |
3485 | * sync, or it may be rebuilding individual components. | |
3486 | * If all the devices are In_sync, then it is the raid set | |
3487 | * that is being initialized. | |
3a1c1ef2 | 3488 | */ |
53be73a5 HM |
3489 | struct md_rdev *rdev; |
3490 | ||
4102d9de | 3491 | set_bit(RT_FLAG_RS_IN_SYNC, &rs->runtime_flags); |
3a1c1ef2 | 3492 | rdev_for_each(rdev, mddev) |
63c32ed4 | 3493 | if (!test_bit(Journal, &rdev->flags) && |
4102d9de HM |
3494 | !test_bit(In_sync, &rdev->flags)) { |
3495 | clear_bit(RT_FLAG_RS_IN_SYNC, &rs->runtime_flags); | |
3496 | break; | |
3497 | } | |
2e727c3c | 3498 | } |
3a1c1ef2 HM |
3499 | } |
3500 | ||
4102d9de | 3501 | return min(r, resync_max_sectors); |
3a1c1ef2 HM |
3502 | } |
3503 | ||
3504 | /* Helper to return @dev name or "-" if !@dev */ | |
e6ca5e1a | 3505 | static const char *__get_dev_name(struct dm_dev *dev) |
3a1c1ef2 HM |
3506 | { |
3507 | return dev ? dev->name : "-"; | |
3508 | } | |
3509 | ||
3510 | static void raid_status(struct dm_target *ti, status_type_t type, | |
3511 | unsigned int status_flags, char *result, unsigned int maxlen) | |
3512 | { | |
3513 | struct raid_set *rs = ti->private; | |
3514 | struct mddev *mddev = &rs->md; | |
1fbeea21 | 3515 | struct r5conf *conf = rs_is_raid456(rs) ? mddev->private : NULL; |
7a7c330f | 3516 | int i, max_nr_stripes = conf ? conf->max_nr_stripes : 0; |
67143510 | 3517 | unsigned long recovery; |
3a1c1ef2 HM |
3518 | unsigned int raid_param_cnt = 1; /* at least 1 for chunksize */ |
3519 | unsigned int sz = 0; | |
43f3952a | 3520 | unsigned int rebuild_writemostly_count = 0; |
3a1c1ef2 | 3521 | sector_t progress, resync_max_sectors, resync_mismatches; |
53be73a5 | 3522 | enum sync_state state; |
3a1c1ef2 | 3523 | struct raid_type *rt; |
3a1c1ef2 HM |
3524 | |
3525 | switch (type) { | |
3526 | case STATUSTYPE_INFO: | |
3527 | /* *Should* always succeed */ | |
3528 | rt = get_raid_type_by_ll(mddev->new_level, mddev->new_layout); | |
3529 | if (!rt) | |
3530 | return; | |
3531 | ||
9dbd1aa3 | 3532 | DMEMIT("%s %d ", rt->name, mddev->raid_disks); |
3a1c1ef2 HM |
3533 | |
3534 | /* Access most recent mddev properties for status output */ | |
3535 | smp_rmb(); | |
3536 | /* Get sensible max sectors even if raid set not yet started */ | |
4286325b | 3537 | resync_max_sectors = test_bit(RT_FLAG_RS_PRERESUMED, &rs->runtime_flags) ? |
3a1c1ef2 | 3538 | mddev->resync_max_sectors : mddev->dev_sectors; |
53be73a5 HM |
3539 | recovery = rs->md.recovery; |
3540 | state = decipher_sync_action(mddev, recovery); | |
3541 | progress = rs_get_progress(rs, recovery, state, resync_max_sectors); | |
3a1c1ef2 | 3542 | resync_mismatches = (mddev->last_sync_action && !strcasecmp(mddev->last_sync_action, "check")) ? |
9dbd1aa3 | 3543 | atomic64_read(&mddev->resync_mismatches) : 0; |
3a1c1ef2 | 3544 | |
c63ede3b HM |
3545 | /* HM FIXME: do we want another state char for raid0? It shows 'D'/'A'/'-' now */ |
3546 | for (i = 0; i < rs->raid_disks; i++) | |
242ea5ad | 3547 | DMEMIT(__raid_dev_status(rs, &rs->dev[i].rdev)); |
9d09e663 | 3548 | |
2e727c3c | 3549 | /* |
3a1c1ef2 | 3550 | * In-sync/Reshape ratio: |
2e727c3c | 3551 | * The in-sync ratio shows the progress of: |
3a1c1ef2 HM |
3552 | * - Initializing the raid set |
3553 | * - Rebuilding a subset of devices of the raid set | |
2e727c3c JB |
3554 | * The user can distinguish between the two by referring |
3555 | * to the status characters. | |
3a1c1ef2 HM |
3556 | * |
3557 | * The reshape ratio shows the progress of | |
3558 | * changing the raid layout or the number of | |
3559 | * disks of a raid set | |
2e727c3c | 3560 | */ |
3a1c1ef2 HM |
3561 | DMEMIT(" %llu/%llu", (unsigned long long) progress, |
3562 | (unsigned long long) resync_max_sectors); | |
9d09e663 | 3563 | |
be83651f | 3564 | /* |
3a1c1ef2 HM |
3565 | * v1.5.0+: |
3566 | * | |
be83651f | 3567 | * Sync action: |
6cf2a73c | 3568 | * See Documentation/admin-guide/device-mapper/dm-raid.rst for |
be83651f JB |
3569 | * information on each of these states. |
3570 | */ | |
53be73a5 | 3571 | DMEMIT(" %s", sync_str(state)); |
be83651f JB |
3572 | |
3573 | /* | |
3a1c1ef2 HM |
3574 | * v1.5.0+: |
3575 | * | |
be83651f JB |
3576 | * resync_mismatches/mismatch_cnt |
3577 | * This field shows the number of discrepancies found when | |
3a1c1ef2 | 3578 | * performing a "check" of the raid set. |
be83651f | 3579 | */ |
3a1c1ef2 | 3580 | DMEMIT(" %llu", (unsigned long long) resync_mismatches); |
9d09e663 | 3581 | |
3a1c1ef2 | 3582 | /* |
9b6e5423 | 3583 | * v1.9.0+: |
3a1c1ef2 HM |
3584 | * |
3585 | * data_offset (needed for out of space reshaping) | |
3586 | * This field shows the data offset into the data | |
3587 | * image LV where the first stripes data starts. | |
3588 | * | |
3589 | * We keep data_offset equal on all raid disks of the set, | |
3590 | * so retrieving it from the first raid disk is sufficient. | |
3591 | */ | |
3592 | DMEMIT(" %llu", (unsigned long long) rs->dev[0].rdev.data_offset); | |
63c32ed4 HM |
3593 | |
3594 | /* | |
3595 | * v1.10.0+: | |
3596 | */ | |
3597 | DMEMIT(" %s", test_bit(__CTR_FLAG_JOURNAL_DEV, &rs->ctr_flags) ? | |
242ea5ad | 3598 | __raid_dev_status(rs, &rs->journal_dev.rdev) : "-"); |
3a1c1ef2 | 3599 | break; |
9d09e663 | 3600 | |
3a1c1ef2 HM |
3601 | case STATUSTYPE_TABLE: |
3602 | /* Report the table line string you would use to construct this raid set */ | |
3603 | ||
43f3952a HM |
3604 | /* |
3605 | * Count any rebuild or writemostly argument pairs and subtract the | |
3606 | * hweight count being added below of any rebuild and writemostly ctr flags. | |
3607 | */ | |
3608 | for (i = 0; i < rs->raid_disks; i++) { | |
3609 | rebuild_writemostly_count += (test_bit(i, (void *) rs->rebuild_disks) ? 2 : 0) + | |
3610 | (test_bit(WriteMostly, &rs->dev[i].rdev.flags) ? 2 : 0); | |
3611 | } | |
3612 | rebuild_writemostly_count -= (test_bit(__CTR_FLAG_REBUILD, &rs->ctr_flags) ? 2 : 0) + | |
3613 | (test_bit(__CTR_FLAG_WRITE_MOSTLY, &rs->ctr_flags) ? 2 : 0); | |
3614 | /* Calculate raid parameter count based on ^ rebuild/writemostly argument counts and ctr flags set. */ | |
3615 | raid_param_cnt += rebuild_writemostly_count + | |
3a1c1ef2 | 3616 | hweight32(rs->ctr_flags & CTR_FLAG_OPTIONS_NO_ARGS) + |
43f3952a | 3617 | hweight32(rs->ctr_flags & CTR_FLAG_OPTIONS_ONE_ARG) * 2; |
3a1c1ef2 | 3618 | /* Emit table line */ |
4464e36e | 3619 | /* This has to be in the documented order for userspace! */ |
3a1c1ef2 | 3620 | DMEMIT("%s %u %u", rs->raid_type->name, raid_param_cnt, mddev->new_chunk_sectors); |
4286325b | 3621 | if (test_bit(__CTR_FLAG_SYNC, &rs->ctr_flags)) |
3fa6cf38 | 3622 | DMEMIT(" %s", dm_raid_arg_name_by_flag(CTR_FLAG_SYNC)); |
4464e36e HM |
3623 | if (test_bit(__CTR_FLAG_NOSYNC, &rs->ctr_flags)) |
3624 | DMEMIT(" %s", dm_raid_arg_name_by_flag(CTR_FLAG_NOSYNC)); | |
43f3952a | 3625 | if (test_bit(__CTR_FLAG_REBUILD, &rs->ctr_flags)) |
7a7c330f | 3626 | for (i = 0; i < rs->raid_disks; i++) |
43f3952a HM |
3627 | if (test_bit(i, (void *) rs->rebuild_disks)) |
3628 | DMEMIT(" %s %u", dm_raid_arg_name_by_flag(CTR_FLAG_REBUILD), i); | |
4464e36e HM |
3629 | if (test_bit(__CTR_FLAG_DAEMON_SLEEP, &rs->ctr_flags)) |
3630 | DMEMIT(" %s %lu", dm_raid_arg_name_by_flag(CTR_FLAG_DAEMON_SLEEP), | |
3631 | mddev->bitmap_info.daemon_sleep); | |
3632 | if (test_bit(__CTR_FLAG_MIN_RECOVERY_RATE, &rs->ctr_flags)) | |
3633 | DMEMIT(" %s %d", dm_raid_arg_name_by_flag(CTR_FLAG_MIN_RECOVERY_RATE), | |
3634 | mddev->sync_speed_min); | |
3635 | if (test_bit(__CTR_FLAG_MAX_RECOVERY_RATE, &rs->ctr_flags)) | |
3636 | DMEMIT(" %s %d", dm_raid_arg_name_by_flag(CTR_FLAG_MAX_RECOVERY_RATE), | |
3637 | mddev->sync_speed_max); | |
43f3952a | 3638 | if (test_bit(__CTR_FLAG_WRITE_MOSTLY, &rs->ctr_flags)) |
7a7c330f HM |
3639 | for (i = 0; i < rs->raid_disks; i++) |
3640 | if (test_bit(WriteMostly, &rs->dev[i].rdev.flags)) | |
3641 | DMEMIT(" %s %d", dm_raid_arg_name_by_flag(CTR_FLAG_WRITE_MOSTLY), | |
3642 | rs->dev[i].rdev.raid_disk); | |
4286325b | 3643 | if (test_bit(__CTR_FLAG_MAX_WRITE_BEHIND, &rs->ctr_flags)) |
3fa6cf38 | 3644 | DMEMIT(" %s %lu", dm_raid_arg_name_by_flag(CTR_FLAG_MAX_WRITE_BEHIND), |
3a1c1ef2 | 3645 | mddev->bitmap_info.max_write_behind); |
4464e36e HM |
3646 | if (test_bit(__CTR_FLAG_STRIPE_CACHE, &rs->ctr_flags)) |
3647 | DMEMIT(" %s %d", dm_raid_arg_name_by_flag(CTR_FLAG_STRIPE_CACHE), | |
3648 | max_nr_stripes); | |
3649 | if (test_bit(__CTR_FLAG_REGION_SIZE, &rs->ctr_flags)) | |
3650 | DMEMIT(" %s %llu", dm_raid_arg_name_by_flag(CTR_FLAG_REGION_SIZE), | |
3651 | (unsigned long long) to_sector(mddev->bitmap_info.chunksize)); | |
3652 | if (test_bit(__CTR_FLAG_RAID10_COPIES, &rs->ctr_flags)) | |
3653 | DMEMIT(" %s %d", dm_raid_arg_name_by_flag(CTR_FLAG_RAID10_COPIES), | |
3654 | raid10_md_layout_to_copies(mddev->layout)); | |
3655 | if (test_bit(__CTR_FLAG_RAID10_FORMAT, &rs->ctr_flags)) | |
3656 | DMEMIT(" %s %s", dm_raid_arg_name_by_flag(CTR_FLAG_RAID10_FORMAT), | |
3657 | raid10_md_layout_to_format(mddev->layout)); | |
3658 | if (test_bit(__CTR_FLAG_DELTA_DISKS, &rs->ctr_flags)) | |
3659 | DMEMIT(" %s %d", dm_raid_arg_name_by_flag(CTR_FLAG_DELTA_DISKS), | |
3660 | max(rs->delta_disks, mddev->delta_disks)); | |
3661 | if (test_bit(__CTR_FLAG_DATA_OFFSET, &rs->ctr_flags)) | |
3662 | DMEMIT(" %s %llu", dm_raid_arg_name_by_flag(CTR_FLAG_DATA_OFFSET), | |
3663 | (unsigned long long) rs->data_offset); | |
63c32ed4 HM |
3664 | if (test_bit(__CTR_FLAG_JOURNAL_DEV, &rs->ctr_flags)) |
3665 | DMEMIT(" %s %s", dm_raid_arg_name_by_flag(CTR_FLAG_JOURNAL_DEV), | |
3666 | __get_dev_name(rs->journal_dev.dev)); | |
6e53636f HM |
3667 | if (test_bit(__CTR_FLAG_JOURNAL_MODE, &rs->ctr_flags)) |
3668 | DMEMIT(" %s %s", dm_raid_arg_name_by_flag(CTR_FLAG_JOURNAL_MODE), | |
3669 | md_journal_mode_to_dm_raid(rs->journal_dev.mode)); | |
3a1c1ef2 | 3670 | DMEMIT(" %d", rs->raid_disks); |
7a7c330f HM |
3671 | for (i = 0; i < rs->raid_disks; i++) |
3672 | DMEMIT(" %s %s", __get_dev_name(rs->dev[i].meta_dev), | |
3673 | __get_dev_name(rs->dev[i].data_dev)); | |
8ec45662 TS |
3674 | break; |
3675 | ||
3676 | case STATUSTYPE_IMA: | |
3677 | rt = get_raid_type_by_ll(mddev->new_level, mddev->new_layout); | |
3678 | if (!rt) | |
3679 | return; | |
3680 | ||
3681 | DMEMIT_TARGET_NAME_VERSION(ti->type); | |
3682 | DMEMIT(",raid_type=%s,raid_disks=%d", rt->name, mddev->raid_disks); | |
3683 | ||
3684 | /* Access most recent mddev properties for status output */ | |
3685 | smp_rmb(); | |
3686 | recovery = rs->md.recovery; | |
3687 | state = decipher_sync_action(mddev, recovery); | |
3688 | DMEMIT(",raid_state=%s", sync_str(state)); | |
3689 | ||
3690 | for (i = 0; i < rs->raid_disks; i++) { | |
3691 | DMEMIT(",raid_device_%d_status=", i); | |
3692 | DMEMIT(__raid_dev_status(rs, &rs->dev[i].rdev)); | |
3693 | } | |
3694 | ||
3695 | if (rt_is_raid456(rt)) { | |
3696 | DMEMIT(",journal_dev_mode="); | |
3697 | switch (rs->journal_dev.mode) { | |
3698 | case R5C_JOURNAL_MODE_WRITE_THROUGH: | |
3699 | DMEMIT("%s", | |
3700 | _raid456_journal_mode[R5C_JOURNAL_MODE_WRITE_THROUGH].param); | |
3701 | break; | |
3702 | case R5C_JOURNAL_MODE_WRITE_BACK: | |
3703 | DMEMIT("%s", | |
3704 | _raid456_journal_mode[R5C_JOURNAL_MODE_WRITE_BACK].param); | |
3705 | break; | |
3706 | default: | |
3707 | DMEMIT("invalid"); | |
3708 | break; | |
3709 | } | |
3710 | } | |
3711 | DMEMIT(";"); | |
3712 | break; | |
9d09e663 | 3713 | } |
9d09e663 N |
3714 | } |
3715 | ||
1eb5fa84 | 3716 | static int raid_message(struct dm_target *ti, unsigned int argc, char **argv, |
86a3238c | 3717 | char *result, unsigned int maxlen) |
be83651f JB |
3718 | { |
3719 | struct raid_set *rs = ti->private; | |
3720 | struct mddev *mddev = &rs->md; | |
3721 | ||
be83651f JB |
3722 | if (!mddev->pers || !mddev->pers->sync_request) |
3723 | return -EINVAL; | |
3724 | ||
3725 | if (!strcasecmp(argv[0], "frozen")) | |
3726 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
3727 | else | |
3728 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
3729 | ||
3730 | if (!strcasecmp(argv[0], "idle") || !strcasecmp(argv[0], "frozen")) { | |
3731 | if (mddev->sync_thread) { | |
3732 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
d0a18034 | 3733 | md_reap_sync_thread(mddev); |
be83651f | 3734 | } |
74694bcb | 3735 | } else if (decipher_sync_action(mddev, mddev->recovery) != st_idle) |
be83651f JB |
3736 | return -EBUSY; |
3737 | else if (!strcasecmp(argv[0], "resync")) | |
3a1c1ef2 HM |
3738 | ; /* MD_RECOVERY_NEEDED set below */ |
3739 | else if (!strcasecmp(argv[0], "recover")) | |
be83651f | 3740 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
3a1c1ef2 | 3741 | else { |
ad470472 | 3742 | if (!strcasecmp(argv[0], "check")) { |
be83651f | 3743 | set_bit(MD_RECOVERY_CHECK, &mddev->recovery); |
ad470472 MS |
3744 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
3745 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
3746 | } else if (!strcasecmp(argv[0], "repair")) { | |
105db599 MS |
3747 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
3748 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
3749 | } else | |
be83651f | 3750 | return -EINVAL; |
be83651f JB |
3751 | } |
3752 | if (mddev->ro == 2) { | |
3753 | /* A write to sync_action is enough to justify | |
3754 | * canceling read-auto mode | |
3755 | */ | |
3756 | mddev->ro = 0; | |
955a257d | 3757 | if (!mddev->suspended) |
be83651f JB |
3758 | md_wakeup_thread(mddev->sync_thread); |
3759 | } | |
3760 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
955a257d | 3761 | if (!mddev->suspended) |
be83651f JB |
3762 | md_wakeup_thread(mddev->thread); |
3763 | ||
3764 | return 0; | |
3765 | } | |
3766 | ||
3767 | static int raid_iterate_devices(struct dm_target *ti, | |
3768 | iterate_devices_callout_fn fn, void *data) | |
9d09e663 N |
3769 | { |
3770 | struct raid_set *rs = ti->private; | |
094f394d | 3771 | unsigned int i; |
73c6f239 | 3772 | int r = 0; |
9d09e663 | 3773 | |
332bd077 HM |
3774 | for (i = 0; !r && i < rs->raid_disks; i++) { |
3775 | if (rs->dev[i].data_dev) { | |
3776 | r = fn(ti, rs->dev[i].data_dev, | |
3777 | 0, /* No offset on data devs */ | |
3778 | rs->md.dev_sectors, data); | |
3779 | } | |
3780 | } | |
9d09e663 | 3781 | |
73c6f239 | 3782 | return r; |
9d09e663 N |
3783 | } |
3784 | ||
3785 | static void raid_io_hints(struct dm_target *ti, struct queue_limits *limits) | |
3786 | { | |
3787 | struct raid_set *rs = ti->private; | |
c8156fc7 | 3788 | unsigned int chunk_size_bytes = to_bytes(rs->md.chunk_sectors); |
9d09e663 | 3789 | |
c8156fc7 ML |
3790 | blk_limits_io_min(limits, chunk_size_bytes); |
3791 | blk_limits_io_opt(limits, chunk_size_bytes * mddev_data_stripes(rs)); | |
9d09e663 N |
3792 | } |
3793 | ||
9d09e663 N |
3794 | static void raid_postsuspend(struct dm_target *ti) |
3795 | { | |
3796 | struct raid_set *rs = ti->private; | |
3797 | ||
4d5324f7 | 3798 | if (!test_and_set_bit(RT_FLAG_RS_SUSPENDED, &rs->runtime_flags)) { |
1af2048a HM |
3799 | /* Writes have to be stopped before suspending to avoid deadlocks. */ |
3800 | if (!test_bit(MD_RECOVERY_FROZEN, &rs->md.recovery)) | |
3801 | md_stop_writes(&rs->md); | |
3802 | ||
2b16a525 | 3803 | mddev_suspend(&rs->md, false); |
4d5324f7 | 3804 | } |
9d09e663 N |
3805 | } |
3806 | ||
f381e71b | 3807 | static void attempt_restore_of_faulty_devices(struct raid_set *rs) |
9d09e663 | 3808 | { |
9092c02d | 3809 | int i; |
a3c06a38 | 3810 | uint64_t cleared_failed_devices[DISKS_ARRAY_ELEMS]; |
9092c02d | 3811 | unsigned long flags; |
a3c06a38 | 3812 | bool cleared = false; |
9092c02d | 3813 | struct dm_raid_superblock *sb; |
a3c06a38 | 3814 | struct mddev *mddev = &rs->md; |
9092c02d | 3815 | struct md_rdev *r; |
9d09e663 | 3816 | |
a3c06a38 HM |
3817 | /* RAID personalities have to provide hot add/remove methods or we need to bail out. */ |
3818 | if (!mddev->pers || !mddev->pers->hot_add_disk || !mddev->pers->hot_remove_disk) | |
3819 | return; | |
3820 | ||
3821 | memset(cleared_failed_devices, 0, sizeof(cleared_failed_devices)); | |
3822 | ||
7dad24db | 3823 | for (i = 0; i < rs->raid_disks; i++) { |
f381e71b | 3824 | r = &rs->dev[i].rdev; |
63c32ed4 HM |
3825 | /* HM FIXME: enhance journal device recovery processing */ |
3826 | if (test_bit(Journal, &r->flags)) | |
3827 | continue; | |
3828 | ||
e2568465 HM |
3829 | if (test_bit(Faulty, &r->flags) && |
3830 | r->meta_bdev && !read_disk_sb(r, r->sb_size, true)) { | |
f381e71b JB |
3831 | DMINFO("Faulty %s device #%d has readable super block." |
3832 | " Attempting to revive it.", | |
3833 | rs->raid_type->name, i); | |
a4dc163a JB |
3834 | |
3835 | /* | |
3836 | * Faulty bit may be set, but sometimes the array can | |
3837 | * be suspended before the personalities can respond | |
3838 | * by removing the device from the array (i.e. calling | |
43157840 | 3839 | * 'hot_remove_disk'). If they haven't yet removed |
a4dc163a JB |
3840 | * the failed device, its 'raid_disk' number will be |
3841 | * '>= 0' - meaning we must call this function | |
3842 | * ourselves. | |
3843 | */ | |
f381e71b | 3844 | flags = r->flags; |
c63ede3b HM |
3845 | clear_bit(In_sync, &r->flags); /* Mandatory for hot remove. */ |
3846 | if (r->raid_disk >= 0) { | |
3847 | if (mddev->pers->hot_remove_disk(mddev, r)) { | |
3848 | /* Failed to revive this device, try next */ | |
3849 | r->flags = flags; | |
3850 | continue; | |
3851 | } | |
3852 | } else | |
3853 | r->raid_disk = r->saved_raid_disk = i; | |
3854 | ||
f381e71b JB |
3855 | clear_bit(Faulty, &r->flags); |
3856 | clear_bit(WriteErrorSeen, &r->flags); | |
c63ede3b | 3857 | |
a3c06a38 | 3858 | if (mddev->pers->hot_add_disk(mddev, r)) { |
c63ede3b HM |
3859 | /* Failed to revive this device, try next */ |
3860 | r->raid_disk = r->saved_raid_disk = -1; | |
f381e71b JB |
3861 | r->flags = flags; |
3862 | } else { | |
c63ede3b | 3863 | clear_bit(In_sync, &r->flags); |
f381e71b | 3864 | r->recovery_offset = 0; |
a3c06a38 HM |
3865 | set_bit(i, (void *) cleared_failed_devices); |
3866 | cleared = true; | |
f381e71b JB |
3867 | } |
3868 | } | |
3869 | } | |
a3c06a38 HM |
3870 | |
3871 | /* If any failed devices could be cleared, update all sbs failed_devices bits */ | |
3872 | if (cleared) { | |
3873 | uint64_t failed_devices[DISKS_ARRAY_ELEMS]; | |
3874 | ||
f381e71b | 3875 | rdev_for_each(r, &rs->md) { |
63c32ed4 HM |
3876 | if (test_bit(Journal, &r->flags)) |
3877 | continue; | |
3878 | ||
f381e71b | 3879 | sb = page_address(r->sb_page); |
a3c06a38 HM |
3880 | sb_retrieve_failed_devices(sb, failed_devices); |
3881 | ||
3882 | for (i = 0; i < DISKS_ARRAY_ELEMS; i++) | |
3883 | failed_devices[i] &= ~cleared_failed_devices[i]; | |
3884 | ||
3885 | sb_update_failed_devices(sb, failed_devices); | |
f381e71b JB |
3886 | } |
3887 | } | |
3888 | } | |
3889 | ||
e6ca5e1a | 3890 | static int __load_dirty_region_bitmap(struct raid_set *rs) |
ecbfb9f1 HM |
3891 | { |
3892 | int r = 0; | |
3893 | ||
3894 | /* Try loading the bitmap unless "raid0", which does not have one */ | |
3895 | if (!rs_is_raid0(rs) && | |
4286325b | 3896 | !test_and_set_bit(RT_FLAG_RS_BITMAP_LOADED, &rs->runtime_flags)) { |
e64e4018 | 3897 | r = md_bitmap_load(&rs->md); |
ecbfb9f1 HM |
3898 | if (r) |
3899 | DMERR("Failed to load bitmap"); | |
3900 | } | |
3901 | ||
3902 | return r; | |
3903 | } | |
3904 | ||
6e20902e HM |
3905 | /* Enforce updating all superblocks */ |
3906 | static void rs_update_sbs(struct raid_set *rs) | |
3907 | { | |
3908 | struct mddev *mddev = &rs->md; | |
3909 | int ro = mddev->ro; | |
3910 | ||
2953079c | 3911 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
6e20902e HM |
3912 | mddev->ro = 0; |
3913 | md_update_sb(mddev, 1); | |
3914 | mddev->ro = ro; | |
3915 | } | |
3916 | ||
9dbd1aa3 HM |
3917 | /* |
3918 | * Reshape changes raid algorithm of @rs to new one within personality | |
3919 | * (e.g. raid6_zr -> raid6_nc), changes stripe size, adds/removes | |
3920 | * disks from a raid set thus growing/shrinking it or resizes the set | |
3921 | * | |
3922 | * Call mddev_lock_nointr() before! | |
3923 | */ | |
3924 | static int rs_start_reshape(struct raid_set *rs) | |
3925 | { | |
3926 | int r; | |
3927 | struct mddev *mddev = &rs->md; | |
3928 | struct md_personality *pers = mddev->pers; | |
3929 | ||
644e2537 HM |
3930 | /* Don't allow the sync thread to work until the table gets reloaded. */ |
3931 | set_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
3932 | ||
9dbd1aa3 HM |
3933 | r = rs_setup_reshape(rs); |
3934 | if (r) | |
3935 | return r; | |
3936 | ||
9dbd1aa3 HM |
3937 | /* |
3938 | * Check any reshape constraints enforced by the personalility | |
3939 | * | |
3940 | * May as well already kick the reshape off so that * pers->start_reshape() becomes optional. | |
3941 | */ | |
3942 | r = pers->check_reshape(mddev); | |
3943 | if (r) { | |
3944 | rs->ti->error = "pers->check_reshape() failed"; | |
3945 | return r; | |
3946 | } | |
3947 | ||
3948 | /* | |
3949 | * Personality may not provide start reshape method in which | |
3950 | * case check_reshape above has already covered everything | |
3951 | */ | |
3952 | if (pers->start_reshape) { | |
3953 | r = pers->start_reshape(mddev); | |
3954 | if (r) { | |
3955 | rs->ti->error = "pers->start_reshape() failed"; | |
3956 | return r; | |
3957 | } | |
3958 | } | |
3959 | ||
6e20902e HM |
3960 | /* |
3961 | * Now reshape got set up, update superblocks to | |
3962 | * reflect the fact so that a table reload will | |
3963 | * access proper superblock content in the ctr. | |
3964 | */ | |
3965 | rs_update_sbs(rs); | |
9dbd1aa3 HM |
3966 | |
3967 | return 0; | |
3968 | } | |
3969 | ||
ecbfb9f1 HM |
3970 | static int raid_preresume(struct dm_target *ti) |
3971 | { | |
9dbd1aa3 | 3972 | int r; |
ecbfb9f1 HM |
3973 | struct raid_set *rs = ti->private; |
3974 | struct mddev *mddev = &rs->md; | |
3975 | ||
11e47232 | 3976 | /* This is a resume after a suspend of the set -> it's already started. */ |
4286325b | 3977 | if (test_and_set_bit(RT_FLAG_RS_PRERESUMED, &rs->runtime_flags)) |
ecbfb9f1 HM |
3978 | return 0; |
3979 | ||
3980 | /* | |
3981 | * The superblocks need to be updated on disk if the | |
6e20902e HM |
3982 | * array is new or new devices got added (thus zeroed |
3983 | * out by userspace) or __load_dirty_region_bitmap | |
3984 | * will overwrite them in core with old data or fail. | |
ecbfb9f1 | 3985 | */ |
6e20902e HM |
3986 | if (test_bit(RT_FLAG_UPDATE_SBS, &rs->runtime_flags)) |
3987 | rs_update_sbs(rs); | |
ecbfb9f1 | 3988 | |
ecbfb9f1 | 3989 | /* Load the bitmap from disk unless raid0 */ |
9dbd1aa3 HM |
3990 | r = __load_dirty_region_bitmap(rs); |
3991 | if (r) | |
3992 | return r; | |
3993 | ||
99273d9e HM |
3994 | /* We are extending the raid set size, adjust mddev/md_rdev sizes and set capacity. */ |
3995 | if (test_bit(RT_FLAG_RS_GROW, &rs->runtime_flags)) { | |
3996 | mddev->array_sectors = rs->array_sectors; | |
3997 | mddev->dev_sectors = rs->dev_sectors; | |
3998 | rs_set_rdev_sectors(rs); | |
3999 | rs_set_capacity(rs); | |
4000 | } | |
4001 | ||
4002 | /* Resize bitmap to adjust to changed region size (aka MD bitmap chunksize) or grown device size */ | |
255e2646 | 4003 | if (test_bit(RT_FLAG_RS_BITMAP_LOADED, &rs->runtime_flags) && mddev->bitmap && |
99273d9e HM |
4004 | (test_bit(RT_FLAG_RS_GROW, &rs->runtime_flags) || |
4005 | (rs->requested_bitmap_chunk_sectors && | |
4006 | mddev->bitmap_info.chunksize != to_bytes(rs->requested_bitmap_chunk_sectors)))) { | |
4007 | int chunksize = to_bytes(rs->requested_bitmap_chunk_sectors) ?: mddev->bitmap_info.chunksize; | |
4008 | ||
4009 | r = md_bitmap_resize(mddev->bitmap, mddev->dev_sectors, chunksize, 0); | |
4257e085 HM |
4010 | if (r) |
4011 | DMERR("Failed to resize bitmap"); | |
4012 | } | |
4013 | ||
9dbd1aa3 HM |
4014 | /* Check for any resize/reshape on @rs and adjust/initiate */ |
4015 | /* Be prepared for mddev_resume() in raid_resume() */ | |
4016 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4017 | if (mddev->recovery_cp && mddev->recovery_cp < MaxSector) { | |
99273d9e | 4018 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
9dbd1aa3 | 4019 | mddev->resync_min = mddev->recovery_cp; |
99273d9e HM |
4020 | if (test_bit(RT_FLAG_RS_GROW, &rs->runtime_flags)) |
4021 | mddev->resync_max_sectors = mddev->dev_sectors; | |
9dbd1aa3 HM |
4022 | } |
4023 | ||
345a6cdc | 4024 | /* Check for any reshape request unless new raid set */ |
d39f0010 | 4025 | if (test_bit(RT_FLAG_RESHAPE_RS, &rs->runtime_flags)) { |
9dbd1aa3 | 4026 | /* Initiate a reshape. */ |
61e06e2c | 4027 | rs_set_rdev_sectors(rs); |
9dbd1aa3 HM |
4028 | mddev_lock_nointr(mddev); |
4029 | r = rs_start_reshape(rs); | |
4030 | mddev_unlock(mddev); | |
4031 | if (r) | |
4032 | DMWARN("Failed to check/start reshape, continuing without change"); | |
4033 | r = 0; | |
4034 | } | |
4035 | ||
4036 | return r; | |
ecbfb9f1 HM |
4037 | } |
4038 | ||
f381e71b JB |
4039 | static void raid_resume(struct dm_target *ti) |
4040 | { | |
4041 | struct raid_set *rs = ti->private; | |
ecbfb9f1 | 4042 | struct mddev *mddev = &rs->md; |
f381e71b | 4043 | |
4286325b | 4044 | if (test_and_set_bit(RT_FLAG_RS_RESUMED, &rs->runtime_flags)) { |
ecbfb9f1 HM |
4045 | /* |
4046 | * A secondary resume while the device is active. | |
4047 | * Take this opportunity to check whether any failed | |
4048 | * devices are reachable again. | |
4049 | */ | |
4050 | attempt_restore_of_faulty_devices(rs); | |
31e10a41 | 4051 | } |
34f8ac6d | 4052 | |
4d5324f7 | 4053 | if (test_and_clear_bit(RT_FLAG_RS_SUSPENDED, &rs->runtime_flags)) { |
11e47232 HM |
4054 | /* Only reduce raid set size before running a disk removing reshape. */ |
4055 | if (mddev->delta_disks < 0) | |
4056 | rs_set_capacity(rs); | |
4057 | ||
4d5324f7 | 4058 | mddev_lock_nointr(mddev); |
11e47232 | 4059 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
78a75d10 HM |
4060 | mddev->ro = 0; |
4061 | mddev->in_sync = 0; | |
4eb3327a | 4062 | mddev_unlock_and_resume(mddev); |
4d5324f7 | 4063 | } |
9d09e663 N |
4064 | } |
4065 | ||
4066 | static struct target_type raid_target = { | |
4067 | .name = "raid", | |
43f3952a | 4068 | .version = {1, 15, 1}, |
9d09e663 N |
4069 | .module = THIS_MODULE, |
4070 | .ctr = raid_ctr, | |
4071 | .dtr = raid_dtr, | |
4072 | .map = raid_map, | |
4073 | .status = raid_status, | |
be83651f | 4074 | .message = raid_message, |
9d09e663 N |
4075 | .iterate_devices = raid_iterate_devices, |
4076 | .io_hints = raid_io_hints, | |
9d09e663 | 4077 | .postsuspend = raid_postsuspend, |
ecbfb9f1 | 4078 | .preresume = raid_preresume, |
9d09e663 N |
4079 | .resume = raid_resume, |
4080 | }; | |
3664ff82 | 4081 | module_dm(raid); |
9d09e663 | 4082 | |
48cf06bc HM |
4083 | module_param(devices_handle_discard_safely, bool, 0644); |
4084 | MODULE_PARM_DESC(devices_handle_discard_safely, | |
4085 | "Set to Y if all devices in each array reliably return zeroes on reads from discarded regions"); | |
4086 | ||
ef9b85a6 MS |
4087 | MODULE_DESCRIPTION(DM_NAME " raid0/1/10/4/5/6 target"); |
4088 | MODULE_ALIAS("dm-raid0"); | |
63f33b8d JB |
4089 | MODULE_ALIAS("dm-raid1"); |
4090 | MODULE_ALIAS("dm-raid10"); | |
9d09e663 N |
4091 | MODULE_ALIAS("dm-raid4"); |
4092 | MODULE_ALIAS("dm-raid5"); | |
4093 | MODULE_ALIAS("dm-raid6"); | |
4094 | MODULE_AUTHOR("Neil Brown <dm-devel@redhat.com>"); | |
3a1c1ef2 | 4095 | MODULE_AUTHOR("Heinz Mauelshagen <dm-devel@redhat.com>"); |
9d09e663 | 4096 | MODULE_LICENSE("GPL"); |