Commit | Line | Data |
---|---|---|
9d09e663 N |
1 | /* |
2 | * Copyright (C) 2010-2011 Neil Brown | |
5380c05b | 3 | * Copyright (C) 2010-2018 Red Hat, Inc. All rights reserved. |
9d09e663 N |
4 | * |
5 | * This file is released under the GPL. | |
6 | */ | |
7 | ||
8 | #include <linux/slab.h> | |
056075c7 | 9 | #include <linux/module.h> |
9d09e663 N |
10 | |
11 | #include "md.h" | |
32737279 | 12 | #include "raid1.h" |
9d09e663 | 13 | #include "raid5.h" |
63f33b8d | 14 | #include "raid10.h" |
935fe098 | 15 | #include "md-bitmap.h" |
9d09e663 | 16 | |
3e8dbb7f AK |
17 | #include <linux/device-mapper.h> |
18 | ||
9d09e663 | 19 | #define DM_MSG_PREFIX "raid" |
92c83d79 | 20 | #define MAX_RAID_DEVICES 253 /* md-raid kernel limit */ |
9d09e663 | 21 | |
40ba37e5 HM |
22 | /* |
23 | * Minimum sectors of free reshape space per raid device | |
24 | */ | |
25 | #define MIN_FREE_RESHAPE_SPACE to_sector(4*4096) | |
26 | ||
63c32ed4 HM |
27 | /* |
28 | * Minimum journal space 4 MiB in sectors. | |
29 | */ | |
30 | #define MIN_RAID456_JOURNAL_SPACE (4*2048) | |
31 | ||
48cf06bc HM |
32 | static bool devices_handle_discard_safely = false; |
33 | ||
9d09e663 | 34 | /* |
b12d437b JB |
35 | * The following flags are used by dm-raid.c to set up the array state. |
36 | * They must be cleared before md_run is called. | |
9d09e663 | 37 | */ |
43157840 | 38 | #define FirstUse 10 /* rdev flag */ |
9d09e663 N |
39 | |
40 | struct raid_dev { | |
41 | /* | |
42 | * Two DM devices, one to hold metadata and one to hold the | |
43157840 | 43 | * actual data/parity. The reason for this is to not confuse |
9d09e663 N |
44 | * ti->len and give more flexibility in altering size and |
45 | * characteristics. | |
46 | * | |
47 | * While it is possible for this device to be associated | |
48 | * with a different physical device than the data_dev, it | |
49 | * is intended for it to be the same. | |
50 | * |--------- Physical Device ---------| | |
51 | * |- meta_dev -|------ data_dev ------| | |
52 | */ | |
53 | struct dm_dev *meta_dev; | |
54 | struct dm_dev *data_dev; | |
3cb03002 | 55 | struct md_rdev rdev; |
9d09e663 N |
56 | }; |
57 | ||
58 | /* | |
4286325b | 59 | * Bits for establishing rs->ctr_flags |
702108d1 HM |
60 | * |
61 | * 1 = no flag value | |
62 | * 2 = flag with value | |
9d09e663 | 63 | */ |
4286325b MS |
64 | #define __CTR_FLAG_SYNC 0 /* 1 */ /* Not with raid0! */ |
65 | #define __CTR_FLAG_NOSYNC 1 /* 1 */ /* Not with raid0! */ | |
66 | #define __CTR_FLAG_REBUILD 2 /* 2 */ /* Not with raid0! */ | |
67 | #define __CTR_FLAG_DAEMON_SLEEP 3 /* 2 */ /* Not with raid0! */ | |
68 | #define __CTR_FLAG_MIN_RECOVERY_RATE 4 /* 2 */ /* Not with raid0! */ | |
69 | #define __CTR_FLAG_MAX_RECOVERY_RATE 5 /* 2 */ /* Not with raid0! */ | |
70 | #define __CTR_FLAG_MAX_WRITE_BEHIND 6 /* 2 */ /* Only with raid1! */ | |
71 | #define __CTR_FLAG_WRITE_MOSTLY 7 /* 2 */ /* Only with raid1! */ | |
72 | #define __CTR_FLAG_STRIPE_CACHE 8 /* 2 */ /* Only with raid4/5/6! */ | |
73 | #define __CTR_FLAG_REGION_SIZE 9 /* 2 */ /* Not with raid0! */ | |
74 | #define __CTR_FLAG_RAID10_COPIES 10 /* 2 */ /* Only with raid10 */ | |
75 | #define __CTR_FLAG_RAID10_FORMAT 11 /* 2 */ /* Only with raid10 */ | |
9b6e5423 | 76 | /* New for v1.9.0 */ |
d7ccc2e2 | 77 | #define __CTR_FLAG_DELTA_DISKS 12 /* 2 */ /* Only with reshapable raid1/4/5/6/10! */ |
4286325b MS |
78 | #define __CTR_FLAG_DATA_OFFSET 13 /* 2 */ /* Only with reshapable raid4/5/6/10! */ |
79 | #define __CTR_FLAG_RAID10_USE_NEAR_SETS 14 /* 2 */ /* Only with raid10! */ | |
80 | ||
63c32ed4 | 81 | /* New for v1.10.0 */ |
6e53636f HM |
82 | #define __CTR_FLAG_JOURNAL_DEV 15 /* 2 */ /* Only with raid4/5/6 (journal device)! */ |
83 | ||
84 | /* New for v1.11.1 */ | |
85 | #define __CTR_FLAG_JOURNAL_MODE 16 /* 2 */ /* Only with raid4/5/6 (journal mode)! */ | |
63c32ed4 | 86 | |
4286325b MS |
87 | /* |
88 | * Flags for rs->ctr_flags field. | |
89 | */ | |
90 | #define CTR_FLAG_SYNC (1 << __CTR_FLAG_SYNC) | |
91 | #define CTR_FLAG_NOSYNC (1 << __CTR_FLAG_NOSYNC) | |
92 | #define CTR_FLAG_REBUILD (1 << __CTR_FLAG_REBUILD) | |
93 | #define CTR_FLAG_DAEMON_SLEEP (1 << __CTR_FLAG_DAEMON_SLEEP) | |
94 | #define CTR_FLAG_MIN_RECOVERY_RATE (1 << __CTR_FLAG_MIN_RECOVERY_RATE) | |
95 | #define CTR_FLAG_MAX_RECOVERY_RATE (1 << __CTR_FLAG_MAX_RECOVERY_RATE) | |
96 | #define CTR_FLAG_MAX_WRITE_BEHIND (1 << __CTR_FLAG_MAX_WRITE_BEHIND) | |
97 | #define CTR_FLAG_WRITE_MOSTLY (1 << __CTR_FLAG_WRITE_MOSTLY) | |
98 | #define CTR_FLAG_STRIPE_CACHE (1 << __CTR_FLAG_STRIPE_CACHE) | |
99 | #define CTR_FLAG_REGION_SIZE (1 << __CTR_FLAG_REGION_SIZE) | |
100 | #define CTR_FLAG_RAID10_COPIES (1 << __CTR_FLAG_RAID10_COPIES) | |
101 | #define CTR_FLAG_RAID10_FORMAT (1 << __CTR_FLAG_RAID10_FORMAT) | |
102 | #define CTR_FLAG_DELTA_DISKS (1 << __CTR_FLAG_DELTA_DISKS) | |
103 | #define CTR_FLAG_DATA_OFFSET (1 << __CTR_FLAG_DATA_OFFSET) | |
104 | #define CTR_FLAG_RAID10_USE_NEAR_SETS (1 << __CTR_FLAG_RAID10_USE_NEAR_SETS) | |
63c32ed4 | 105 | #define CTR_FLAG_JOURNAL_DEV (1 << __CTR_FLAG_JOURNAL_DEV) |
6e53636f | 106 | #define CTR_FLAG_JOURNAL_MODE (1 << __CTR_FLAG_JOURNAL_MODE) |
63f33b8d | 107 | |
f090279e HM |
108 | /* |
109 | * Definitions of various constructor flags to | |
110 | * be used in checks of valid / invalid flags | |
111 | * per raid level. | |
112 | */ | |
113 | /* Define all any sync flags */ | |
114 | #define CTR_FLAGS_ANY_SYNC (CTR_FLAG_SYNC | CTR_FLAG_NOSYNC) | |
115 | ||
116 | /* Define flags for options without argument (e.g. 'nosync') */ | |
33e53f06 HM |
117 | #define CTR_FLAG_OPTIONS_NO_ARGS (CTR_FLAGS_ANY_SYNC | \ |
118 | CTR_FLAG_RAID10_USE_NEAR_SETS) | |
f090279e HM |
119 | |
120 | /* Define flags for options with one argument (e.g. 'delta_disks +2') */ | |
121 | #define CTR_FLAG_OPTIONS_ONE_ARG (CTR_FLAG_REBUILD | \ | |
122 | CTR_FLAG_WRITE_MOSTLY | \ | |
123 | CTR_FLAG_DAEMON_SLEEP | \ | |
124 | CTR_FLAG_MIN_RECOVERY_RATE | \ | |
125 | CTR_FLAG_MAX_RECOVERY_RATE | \ | |
126 | CTR_FLAG_MAX_WRITE_BEHIND | \ | |
127 | CTR_FLAG_STRIPE_CACHE | \ | |
128 | CTR_FLAG_REGION_SIZE | \ | |
129 | CTR_FLAG_RAID10_COPIES | \ | |
33e53f06 HM |
130 | CTR_FLAG_RAID10_FORMAT | \ |
131 | CTR_FLAG_DELTA_DISKS | \ | |
43f3952a HM |
132 | CTR_FLAG_DATA_OFFSET | \ |
133 | CTR_FLAG_JOURNAL_DEV | \ | |
134 | CTR_FLAG_JOURNAL_MODE) | |
f090279e | 135 | |
a30cbc0d HM |
136 | /* Valid options definitions per raid level... */ |
137 | ||
138 | /* "raid0" does only accept data offset */ | |
139 | #define RAID0_VALID_FLAGS (CTR_FLAG_DATA_OFFSET) | |
140 | ||
141 | /* "raid1" does not accept stripe cache, data offset, delta_disks or any raid10 options */ | |
142 | #define RAID1_VALID_FLAGS (CTR_FLAGS_ANY_SYNC | \ | |
143 | CTR_FLAG_REBUILD | \ | |
144 | CTR_FLAG_WRITE_MOSTLY | \ | |
145 | CTR_FLAG_DAEMON_SLEEP | \ | |
146 | CTR_FLAG_MIN_RECOVERY_RATE | \ | |
147 | CTR_FLAG_MAX_RECOVERY_RATE | \ | |
148 | CTR_FLAG_MAX_WRITE_BEHIND | \ | |
149 | CTR_FLAG_REGION_SIZE | \ | |
7a7c330f | 150 | CTR_FLAG_DELTA_DISKS | \ |
a30cbc0d | 151 | CTR_FLAG_DATA_OFFSET) |
f090279e | 152 | |
a30cbc0d HM |
153 | /* "raid10" does not accept any raid1 or stripe cache options */ |
154 | #define RAID10_VALID_FLAGS (CTR_FLAGS_ANY_SYNC | \ | |
155 | CTR_FLAG_REBUILD | \ | |
156 | CTR_FLAG_DAEMON_SLEEP | \ | |
157 | CTR_FLAG_MIN_RECOVERY_RATE | \ | |
158 | CTR_FLAG_MAX_RECOVERY_RATE | \ | |
159 | CTR_FLAG_REGION_SIZE | \ | |
f090279e | 160 | CTR_FLAG_RAID10_COPIES | \ |
33e53f06 HM |
161 | CTR_FLAG_RAID10_FORMAT | \ |
162 | CTR_FLAG_DELTA_DISKS | \ | |
a30cbc0d HM |
163 | CTR_FLAG_DATA_OFFSET | \ |
164 | CTR_FLAG_RAID10_USE_NEAR_SETS) | |
f090279e | 165 | |
f090279e HM |
166 | /* |
167 | * "raid4/5/6" do not accept any raid1 or raid10 specific options | |
168 | * | |
169 | * "raid6" does not accept "nosync", because it is not guaranteed | |
170 | * that both parity and q-syndrome are being written properly with | |
171 | * any writes | |
172 | */ | |
a30cbc0d HM |
173 | #define RAID45_VALID_FLAGS (CTR_FLAGS_ANY_SYNC | \ |
174 | CTR_FLAG_REBUILD | \ | |
175 | CTR_FLAG_DAEMON_SLEEP | \ | |
176 | CTR_FLAG_MIN_RECOVERY_RATE | \ | |
177 | CTR_FLAG_MAX_RECOVERY_RATE | \ | |
a30cbc0d HM |
178 | CTR_FLAG_STRIPE_CACHE | \ |
179 | CTR_FLAG_REGION_SIZE | \ | |
180 | CTR_FLAG_DELTA_DISKS | \ | |
63c32ed4 | 181 | CTR_FLAG_DATA_OFFSET | \ |
6e53636f HM |
182 | CTR_FLAG_JOURNAL_DEV | \ |
183 | CTR_FLAG_JOURNAL_MODE) | |
a30cbc0d HM |
184 | |
185 | #define RAID6_VALID_FLAGS (CTR_FLAG_SYNC | \ | |
186 | CTR_FLAG_REBUILD | \ | |
187 | CTR_FLAG_DAEMON_SLEEP | \ | |
188 | CTR_FLAG_MIN_RECOVERY_RATE | \ | |
189 | CTR_FLAG_MAX_RECOVERY_RATE | \ | |
a30cbc0d HM |
190 | CTR_FLAG_STRIPE_CACHE | \ |
191 | CTR_FLAG_REGION_SIZE | \ | |
192 | CTR_FLAG_DELTA_DISKS | \ | |
63c32ed4 | 193 | CTR_FLAG_DATA_OFFSET | \ |
6e53636f HM |
194 | CTR_FLAG_JOURNAL_DEV | \ |
195 | CTR_FLAG_JOURNAL_MODE) | |
a30cbc0d | 196 | /* ...valid options definitions per raid level */ |
f090279e | 197 | |
ecbfb9f1 HM |
198 | /* |
199 | * Flags for rs->runtime_flags field | |
200 | * (RT_FLAG prefix meaning "runtime flag") | |
201 | * | |
202 | * These are all internal and used to define runtime state, | |
203 | * e.g. to prevent another resume from preresume processing | |
204 | * the raid set all over again. | |
205 | */ | |
40ba37e5 HM |
206 | #define RT_FLAG_RS_PRERESUMED 0 |
207 | #define RT_FLAG_RS_RESUMED 1 | |
208 | #define RT_FLAG_RS_BITMAP_LOADED 2 | |
209 | #define RT_FLAG_UPDATE_SBS 3 | |
9dbd1aa3 | 210 | #define RT_FLAG_RESHAPE_RS 4 |
0cf352e5 | 211 | #define RT_FLAG_RS_SUSPENDED 5 |
242ea5ad | 212 | #define RT_FLAG_RS_IN_SYNC 6 |
4102d9de | 213 | #define RT_FLAG_RS_RESYNCING 7 |
99273d9e | 214 | #define RT_FLAG_RS_GROW 8 |
ecbfb9f1 | 215 | |
d7ccc2e2 | 216 | /* Array elements of 64 bit needed for rebuild/failed disk bits */ |
33e53f06 HM |
217 | #define DISKS_ARRAY_ELEMS ((MAX_RAID_DEVICES + (sizeof(uint64_t) * 8 - 1)) / sizeof(uint64_t) / 8) |
218 | ||
ecbfb9f1 HM |
219 | /* |
220 | * raid set level, layout and chunk sectors backup/restore | |
221 | */ | |
222 | struct rs_layout { | |
223 | int new_level; | |
224 | int new_layout; | |
225 | int new_chunk_sectors; | |
226 | }; | |
227 | ||
9d09e663 N |
228 | struct raid_set { |
229 | struct dm_target *ti; | |
230 | ||
9dbd1aa3 | 231 | uint32_t stripe_cache_entries; |
4286325b MS |
232 | unsigned long ctr_flags; |
233 | unsigned long runtime_flags; | |
ecbfb9f1 HM |
234 | |
235 | uint64_t rebuild_disks[DISKS_ARRAY_ELEMS]; | |
9d09e663 | 236 | |
33e53f06 HM |
237 | int raid_disks; |
238 | int delta_disks; | |
4763e543 | 239 | int data_offset; |
33e53f06 | 240 | int raid10_copies; |
4257e085 | 241 | int requested_bitmap_chunk_sectors; |
33e53f06 | 242 | |
fd01b88c | 243 | struct mddev md; |
9d09e663 N |
244 | struct raid_type *raid_type; |
245 | struct dm_target_callbacks callbacks; | |
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 | ||
b18ae8dd | 257 | struct raid_dev dev[]; |
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[] = { | |
366 | { R5C_JOURNAL_MODE_WRITE_THROUGH , "writethrough" }, | |
367 | { R5C_JOURNAL_MODE_WRITE_BACK , "writeback" } | |
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 | ||
704 | set_capacity(gendisk, rs->md.array_sectors); | |
0095dbc9 | 705 | revalidate_disk(gendisk); |
9dbd1aa3 HM |
706 | } |
707 | ||
3a1c1ef2 HM |
708 | /* |
709 | * Set the mddev properties in @rs to the current | |
710 | * ones retrieved from the freshest superblock | |
711 | */ | |
712 | static void rs_set_cur(struct raid_set *rs) | |
713 | { | |
714 | struct mddev *mddev = &rs->md; | |
715 | ||
716 | mddev->new_level = mddev->level; | |
717 | mddev->new_layout = mddev->layout; | |
718 | mddev->new_chunk_sectors = mddev->chunk_sectors; | |
719 | } | |
720 | ||
33e53f06 HM |
721 | /* |
722 | * Set the mddev properties in @rs to the new | |
723 | * ones requested by the ctr | |
724 | */ | |
725 | static void rs_set_new(struct raid_set *rs) | |
726 | { | |
727 | struct mddev *mddev = &rs->md; | |
728 | ||
729 | mddev->level = mddev->new_level; | |
730 | mddev->layout = mddev->new_layout; | |
731 | mddev->chunk_sectors = mddev->new_chunk_sectors; | |
3a1c1ef2 | 732 | mddev->raid_disks = rs->raid_disks; |
33e53f06 HM |
733 | mddev->delta_disks = 0; |
734 | } | |
735 | ||
bfcee0e3 | 736 | static struct raid_set *raid_set_alloc(struct dm_target *ti, struct raid_type *raid_type, |
094f394d | 737 | unsigned int raid_devs) |
9d09e663 | 738 | { |
094f394d | 739 | unsigned int i; |
9d09e663 | 740 | struct raid_set *rs; |
9d09e663 | 741 | |
bd83a4c4 MS |
742 | if (raid_devs <= raid_type->parity_devs) { |
743 | ti->error = "Insufficient number of devices"; | |
744 | return ERR_PTR(-EINVAL); | |
745 | } | |
9d09e663 | 746 | |
acafe7e3 | 747 | rs = kzalloc(struct_size(rs, dev, raid_devs), GFP_KERNEL); |
bd83a4c4 MS |
748 | if (!rs) { |
749 | ti->error = "Cannot allocate raid context"; | |
750 | return ERR_PTR(-ENOMEM); | |
751 | } | |
9d09e663 N |
752 | |
753 | mddev_init(&rs->md); | |
754 | ||
33e53f06 HM |
755 | rs->raid_disks = raid_devs; |
756 | rs->delta_disks = 0; | |
757 | ||
9d09e663 N |
758 | rs->ti = ti; |
759 | rs->raid_type = raid_type; | |
9dbd1aa3 | 760 | rs->stripe_cache_entries = 256; |
9d09e663 N |
761 | rs->md.raid_disks = raid_devs; |
762 | rs->md.level = raid_type->level; | |
763 | rs->md.new_level = rs->md.level; | |
9d09e663 N |
764 | rs->md.layout = raid_type->algorithm; |
765 | rs->md.new_layout = rs->md.layout; | |
766 | rs->md.delta_disks = 0; | |
4dff2f1e | 767 | rs->md.recovery_cp = MaxSector; |
9d09e663 N |
768 | |
769 | for (i = 0; i < raid_devs; i++) | |
770 | md_rdev_init(&rs->dev[i].rdev); | |
771 | ||
772 | /* | |
773 | * Remaining items to be initialized by further RAID params: | |
774 | * rs->md.persistent | |
775 | * rs->md.external | |
776 | * rs->md.chunk_sectors | |
777 | * rs->md.new_chunk_sectors | |
c039c332 | 778 | * rs->md.dev_sectors |
9d09e663 N |
779 | */ |
780 | ||
781 | return rs; | |
782 | } | |
783 | ||
38b0bd0c | 784 | /* Free all @rs allocations */ |
bfcee0e3 | 785 | static void raid_set_free(struct raid_set *rs) |
9d09e663 N |
786 | { |
787 | int i; | |
788 | ||
63c32ed4 HM |
789 | if (rs->journal_dev.dev) { |
790 | md_rdev_clear(&rs->journal_dev.rdev); | |
791 | dm_put_device(rs->ti, rs->journal_dev.dev); | |
792 | } | |
793 | ||
ffeeac75 | 794 | for (i = 0; i < rs->raid_disks; i++) { |
b12d437b JB |
795 | if (rs->dev[i].meta_dev) |
796 | dm_put_device(rs->ti, rs->dev[i].meta_dev); | |
545c8795 | 797 | md_rdev_clear(&rs->dev[i].rdev); |
9d09e663 N |
798 | if (rs->dev[i].data_dev) |
799 | dm_put_device(rs->ti, rs->dev[i].data_dev); | |
b12d437b | 800 | } |
9d09e663 N |
801 | |
802 | kfree(rs); | |
803 | } | |
804 | ||
805 | /* | |
806 | * For every device we have two words | |
807 | * <meta_dev>: meta device name or '-' if missing | |
808 | * <data_dev>: data device name or '-' if missing | |
809 | * | |
b12d437b JB |
810 | * The following are permitted: |
811 | * - - | |
812 | * - <data_dev> | |
813 | * <meta_dev> <data_dev> | |
814 | * | |
815 | * The following is not allowed: | |
816 | * <meta_dev> - | |
817 | * | |
818 | * This code parses those words. If there is a failure, | |
bfcee0e3 | 819 | * the caller must use raid_set_free() to unwind the operations. |
9d09e663 | 820 | */ |
702108d1 | 821 | static int parse_dev_params(struct raid_set *rs, struct dm_arg_set *as) |
9d09e663 N |
822 | { |
823 | int i; | |
824 | int rebuild = 0; | |
825 | int metadata_available = 0; | |
73c6f239 | 826 | int r = 0; |
92c83d79 | 827 | const char *arg; |
9d09e663 | 828 | |
92c83d79 HM |
829 | /* Put off the number of raid devices argument to get to dev pairs */ |
830 | arg = dm_shift_arg(as); | |
831 | if (!arg) | |
832 | return -EINVAL; | |
833 | ||
ffeeac75 | 834 | for (i = 0; i < rs->raid_disks; i++) { |
9d09e663 N |
835 | rs->dev[i].rdev.raid_disk = i; |
836 | ||
837 | rs->dev[i].meta_dev = NULL; | |
838 | rs->dev[i].data_dev = NULL; | |
839 | ||
840 | /* | |
63c32ed4 HM |
841 | * There are no offsets initially. |
842 | * Out of place reshape will set them accordingly. | |
9d09e663 N |
843 | */ |
844 | rs->dev[i].rdev.data_offset = 0; | |
63c32ed4 | 845 | rs->dev[i].rdev.new_data_offset = 0; |
9d09e663 N |
846 | rs->dev[i].rdev.mddev = &rs->md; |
847 | ||
92c83d79 HM |
848 | arg = dm_shift_arg(as); |
849 | if (!arg) | |
850 | return -EINVAL; | |
851 | ||
852 | if (strcmp(arg, "-")) { | |
bd83a4c4 MS |
853 | r = dm_get_device(rs->ti, arg, dm_table_get_mode(rs->ti->table), |
854 | &rs->dev[i].meta_dev); | |
855 | if (r) { | |
856 | rs->ti->error = "RAID metadata device lookup failure"; | |
857 | return r; | |
858 | } | |
b12d437b JB |
859 | |
860 | rs->dev[i].rdev.sb_page = alloc_page(GFP_KERNEL); | |
bd83a4c4 MS |
861 | if (!rs->dev[i].rdev.sb_page) { |
862 | rs->ti->error = "Failed to allocate superblock page"; | |
863 | return -ENOMEM; | |
864 | } | |
9d09e663 N |
865 | } |
866 | ||
92c83d79 HM |
867 | arg = dm_shift_arg(as); |
868 | if (!arg) | |
869 | return -EINVAL; | |
870 | ||
871 | if (!strcmp(arg, "-")) { | |
9d09e663 | 872 | if (!test_bit(In_sync, &rs->dev[i].rdev.flags) && |
bd83a4c4 MS |
873 | (!rs->dev[i].rdev.recovery_offset)) { |
874 | rs->ti->error = "Drive designated for rebuild not specified"; | |
875 | return -EINVAL; | |
876 | } | |
9d09e663 | 877 | |
bd83a4c4 MS |
878 | if (rs->dev[i].meta_dev) { |
879 | rs->ti->error = "No data device supplied with metadata device"; | |
880 | return -EINVAL; | |
881 | } | |
b12d437b | 882 | |
9d09e663 N |
883 | continue; |
884 | } | |
885 | ||
bd83a4c4 MS |
886 | r = dm_get_device(rs->ti, arg, dm_table_get_mode(rs->ti->table), |
887 | &rs->dev[i].data_dev); | |
888 | if (r) { | |
889 | rs->ti->error = "RAID device lookup failure"; | |
890 | return r; | |
891 | } | |
9d09e663 | 892 | |
b12d437b JB |
893 | if (rs->dev[i].meta_dev) { |
894 | metadata_available = 1; | |
895 | rs->dev[i].rdev.meta_bdev = rs->dev[i].meta_dev->bdev; | |
896 | } | |
9d09e663 | 897 | rs->dev[i].rdev.bdev = rs->dev[i].data_dev->bdev; |
3a1c1ef2 | 898 | list_add_tail(&rs->dev[i].rdev.same_set, &rs->md.disks); |
9d09e663 N |
899 | if (!test_bit(In_sync, &rs->dev[i].rdev.flags)) |
900 | rebuild++; | |
901 | } | |
902 | ||
63c32ed4 HM |
903 | if (rs->journal_dev.dev) |
904 | list_add_tail(&rs->journal_dev.rdev.same_set, &rs->md.disks); | |
905 | ||
9d09e663 N |
906 | if (metadata_available) { |
907 | rs->md.external = 0; | |
908 | rs->md.persistent = 1; | |
909 | rs->md.major_version = 2; | |
910 | } else if (rebuild && !rs->md.recovery_cp) { | |
911 | /* | |
912 | * Without metadata, we will not be able to tell if the array | |
913 | * is in-sync or not - we must assume it is not. Therefore, | |
914 | * it is impossible to rebuild a drive. | |
915 | * | |
916 | * Even if there is metadata, the on-disk information may | |
917 | * indicate that the array is not in-sync and it will then | |
918 | * fail at that time. | |
919 | * | |
920 | * User could specify 'nosync' option if desperate. | |
921 | */ | |
bd83a4c4 MS |
922 | rs->ti->error = "Unable to rebuild drive while array is not in-sync"; |
923 | return -EINVAL; | |
9d09e663 N |
924 | } |
925 | ||
926 | return 0; | |
927 | } | |
928 | ||
c1084561 JB |
929 | /* |
930 | * validate_region_size | |
931 | * @rs | |
932 | * @region_size: region size in sectors. If 0, pick a size (4MiB default). | |
933 | * | |
934 | * Set rs->md.bitmap_info.chunksize (which really refers to 'region size'). | |
935 | * Ensure that (ti->len/region_size < 2^21) - required by MD bitmap. | |
936 | * | |
937 | * Returns: 0 on success, -EINVAL on failure. | |
938 | */ | |
939 | static int validate_region_size(struct raid_set *rs, unsigned long region_size) | |
940 | { | |
941 | unsigned long min_region_size = rs->ti->len / (1 << 21); | |
942 | ||
9e7d9367 HM |
943 | if (rs_is_raid0(rs)) |
944 | return 0; | |
945 | ||
c1084561 JB |
946 | if (!region_size) { |
947 | /* | |
43157840 | 948 | * Choose a reasonable default. All figures in sectors. |
c1084561 JB |
949 | */ |
950 | if (min_region_size > (1 << 13)) { | |
3a0f9aae | 951 | /* If not a power of 2, make it the next power of 2 */ |
042745ee | 952 | region_size = roundup_pow_of_two(min_region_size); |
c1084561 JB |
953 | DMINFO("Choosing default region size of %lu sectors", |
954 | region_size); | |
c1084561 JB |
955 | } else { |
956 | DMINFO("Choosing default region size of 4MiB"); | |
957 | region_size = 1 << 13; /* sectors */ | |
958 | } | |
959 | } else { | |
960 | /* | |
961 | * Validate user-supplied value. | |
962 | */ | |
bd83a4c4 MS |
963 | if (region_size > rs->ti->len) { |
964 | rs->ti->error = "Supplied region size is too large"; | |
965 | return -EINVAL; | |
966 | } | |
c1084561 JB |
967 | |
968 | if (region_size < min_region_size) { | |
969 | DMERR("Supplied region_size (%lu sectors) below minimum (%lu)", | |
970 | region_size, min_region_size); | |
bd83a4c4 MS |
971 | rs->ti->error = "Supplied region size is too small"; |
972 | return -EINVAL; | |
c1084561 JB |
973 | } |
974 | ||
bd83a4c4 MS |
975 | if (!is_power_of_2(region_size)) { |
976 | rs->ti->error = "Region size is not a power of 2"; | |
977 | return -EINVAL; | |
978 | } | |
c1084561 | 979 | |
bd83a4c4 MS |
980 | if (region_size < rs->md.chunk_sectors) { |
981 | rs->ti->error = "Region size is smaller than the chunk size"; | |
982 | return -EINVAL; | |
983 | } | |
c1084561 JB |
984 | } |
985 | ||
986 | /* | |
987 | * Convert sectors to bytes. | |
988 | */ | |
89d3d9a1 | 989 | rs->md.bitmap_info.chunksize = to_bytes(region_size); |
c1084561 JB |
990 | |
991 | return 0; | |
992 | } | |
993 | ||
eb649123 | 994 | /* |
55ebbb59 | 995 | * validate_raid_redundancy |
eb649123 JB |
996 | * @rs |
997 | * | |
55ebbb59 JB |
998 | * Determine if there are enough devices in the array that haven't |
999 | * failed (or are being rebuilt) to form a usable array. | |
eb649123 JB |
1000 | * |
1001 | * Returns: 0 on success, -EINVAL on failure. | |
1002 | */ | |
55ebbb59 | 1003 | static int validate_raid_redundancy(struct raid_set *rs) |
eb649123 | 1004 | { |
094f394d HM |
1005 | unsigned int i, rebuild_cnt = 0; |
1006 | unsigned int rebuilds_per_group = 0, copies; | |
1007 | unsigned int group_size, last_group_start; | |
eb649123 | 1008 | |
eb649123 | 1009 | for (i = 0; i < rs->md.raid_disks; i++) |
55ebbb59 JB |
1010 | if (!test_bit(In_sync, &rs->dev[i].rdev.flags) || |
1011 | !rs->dev[i].rdev.sb_page) | |
eb649123 JB |
1012 | rebuild_cnt++; |
1013 | ||
53bf5384 | 1014 | switch (rs->md.level) { |
9e7d9367 HM |
1015 | case 0: |
1016 | break; | |
eb649123 JB |
1017 | case 1: |
1018 | if (rebuild_cnt >= rs->md.raid_disks) | |
1019 | goto too_many; | |
1020 | break; | |
1021 | case 4: | |
1022 | case 5: | |
1023 | case 6: | |
1024 | if (rebuild_cnt > rs->raid_type->parity_devs) | |
1025 | goto too_many; | |
1026 | break; | |
1027 | case 10: | |
9dbd1aa3 | 1028 | copies = raid10_md_layout_to_copies(rs->md.new_layout); |
53bf5384 HM |
1029 | if (copies < 2) { |
1030 | DMERR("Bogus raid10 data copies < 2!"); | |
1031 | return -EINVAL; | |
1032 | } | |
1033 | ||
4ec1e369 JB |
1034 | if (rebuild_cnt < copies) |
1035 | break; | |
1036 | ||
1037 | /* | |
1038 | * It is possible to have a higher rebuild count for RAID10, | |
1039 | * as long as the failed devices occur in different mirror | |
1040 | * groups (i.e. different stripes). | |
1041 | * | |
4ec1e369 JB |
1042 | * When checking "near" format, make sure no adjacent devices |
1043 | * have failed beyond what can be handled. In addition to the | |
1044 | * simple case where the number of devices is a multiple of the | |
1045 | * number of copies, we must also handle cases where the number | |
1046 | * of devices is not a multiple of the number of copies. | |
43157840 MS |
1047 | * E.g. dev1 dev2 dev3 dev4 dev5 |
1048 | * A A B B C | |
1049 | * C D D E E | |
4ec1e369 | 1050 | */ |
9dbd1aa3 | 1051 | if (__is_raid10_near(rs->md.new_layout)) { |
ffeeac75 | 1052 | for (i = 0; i < rs->md.raid_disks; i++) { |
fe5d2f4a JB |
1053 | if (!(i % copies)) |
1054 | rebuilds_per_group = 0; | |
9dbd1aa3 | 1055 | if ((!rs->dev[i].rdev.sb_page || |
40ba37e5 | 1056 | !test_bit(In_sync, &rs->dev[i].rdev.flags)) && |
fe5d2f4a JB |
1057 | (++rebuilds_per_group >= copies)) |
1058 | goto too_many; | |
1059 | } | |
1060 | break; | |
1061 | } | |
1062 | ||
1063 | /* | |
1064 | * When checking "far" and "offset" formats, we need to ensure | |
1065 | * that the device that holds its copy is not also dead or | |
1066 | * being rebuilt. (Note that "far" and "offset" formats only | |
1067 | * support two copies right now. These formats also only ever | |
1068 | * use the 'use_far_sets' variant.) | |
1069 | * | |
1070 | * This check is somewhat complicated by the need to account | |
43157840 | 1071 | * for arrays that are not a multiple of (far) copies. This |
fe5d2f4a JB |
1072 | * results in the need to treat the last (potentially larger) |
1073 | * set differently. | |
1074 | */ | |
1075 | group_size = (rs->md.raid_disks / copies); | |
1076 | last_group_start = (rs->md.raid_disks / group_size) - 1; | |
1077 | last_group_start *= group_size; | |
1078 | for (i = 0; i < rs->md.raid_disks; i++) { | |
1079 | if (!(i % copies) && !(i > last_group_start)) | |
55ebbb59 | 1080 | rebuilds_per_group = 0; |
fe5d2f4a JB |
1081 | if ((!rs->dev[i].rdev.sb_page || |
1082 | !test_bit(In_sync, &rs->dev[i].rdev.flags)) && | |
4ec1e369 | 1083 | (++rebuilds_per_group >= copies)) |
fe5d2f4a | 1084 | goto too_many; |
4ec1e369 JB |
1085 | } |
1086 | break; | |
eb649123 | 1087 | default: |
55ebbb59 JB |
1088 | if (rebuild_cnt) |
1089 | return -EINVAL; | |
eb649123 JB |
1090 | } |
1091 | ||
1092 | return 0; | |
1093 | ||
1094 | too_many: | |
eb649123 JB |
1095 | return -EINVAL; |
1096 | } | |
1097 | ||
9d09e663 N |
1098 | /* |
1099 | * Possible arguments are... | |
9d09e663 N |
1100 | * <chunk_size> [optional_args] |
1101 | * | |
32737279 JB |
1102 | * Argument definitions |
1103 | * <chunk_size> The number of sectors per disk that | |
43157840 | 1104 | * will form the "stripe" |
32737279 | 1105 | * [[no]sync] Force or prevent recovery of the |
43157840 | 1106 | * entire array |
9d09e663 | 1107 | * [rebuild <idx>] Rebuild the drive indicated by the index |
32737279 | 1108 | * [daemon_sleep <ms>] Time between bitmap daemon work to |
43157840 | 1109 | * clear bits |
9d09e663 N |
1110 | * [min_recovery_rate <kB/sec/disk>] Throttle RAID initialization |
1111 | * [max_recovery_rate <kB/sec/disk>] Throttle RAID initialization | |
46bed2b5 | 1112 | * [write_mostly <idx>] Indicate a write mostly drive via index |
9d09e663 N |
1113 | * [max_write_behind <sectors>] See '-write-behind=' (man mdadm) |
1114 | * [stripe_cache <sectors>] Stripe cache size for higher RAIDs | |
43157840 | 1115 | * [region_size <sectors>] Defines granularity of bitmap |
63c32ed4 HM |
1116 | * [journal_dev <dev>] raid4/5/6 journaling deviice |
1117 | * (i.e. write hole closing log) | |
63f33b8d JB |
1118 | * |
1119 | * RAID10-only options: | |
43157840 | 1120 | * [raid10_copies <# copies>] Number of copies. (Default: 2) |
fe5d2f4a | 1121 | * [raid10_format <near|far|offset>] Layout algorithm. (Default: near) |
9d09e663 | 1122 | */ |
92c83d79 | 1123 | static int parse_raid_params(struct raid_set *rs, struct dm_arg_set *as, |
094f394d | 1124 | unsigned int num_raid_params) |
9d09e663 | 1125 | { |
9dbd1aa3 | 1126 | int value, raid10_format = ALGORITHM_RAID10_DEFAULT; |
094f394d HM |
1127 | unsigned int raid10_copies = 2; |
1128 | unsigned int i, write_mostly = 0; | |
1129 | unsigned int region_size = 0; | |
542f9038 | 1130 | sector_t max_io_len; |
92c83d79 | 1131 | const char *arg, *key; |
702108d1 | 1132 | struct raid_dev *rd; |
33e53f06 | 1133 | struct raid_type *rt = rs->raid_type; |
92c83d79 HM |
1134 | |
1135 | arg = dm_shift_arg(as); | |
1136 | num_raid_params--; /* Account for chunk_size argument */ | |
1137 | ||
9dbd1aa3 | 1138 | if (kstrtoint(arg, 10, &value) < 0) { |
bd83a4c4 MS |
1139 | rs->ti->error = "Bad numerical argument given for chunk_size"; |
1140 | return -EINVAL; | |
1141 | } | |
9d09e663 N |
1142 | |
1143 | /* | |
1144 | * First, parse the in-order required arguments | |
32737279 | 1145 | * "chunk_size" is the only argument of this type. |
9d09e663 | 1146 | */ |
33e53f06 | 1147 | if (rt_is_raid1(rt)) { |
32737279 JB |
1148 | if (value) |
1149 | DMERR("Ignoring chunk size parameter for RAID 1"); | |
1150 | value = 0; | |
bd83a4c4 MS |
1151 | } else if (!is_power_of_2(value)) { |
1152 | rs->ti->error = "Chunk size must be a power of 2"; | |
1153 | return -EINVAL; | |
1154 | } else if (value < 8) { | |
1155 | rs->ti->error = "Chunk size value is too small"; | |
1156 | return -EINVAL; | |
1157 | } | |
9d09e663 N |
1158 | |
1159 | rs->md.new_chunk_sectors = rs->md.chunk_sectors = value; | |
9d09e663 N |
1160 | |
1161 | /* | |
b12d437b JB |
1162 | * We set each individual device as In_sync with a completed |
1163 | * 'recovery_offset'. If there has been a device failure or | |
1164 | * replacement then one of the following cases applies: | |
1165 | * | |
1166 | * 1) User specifies 'rebuild'. | |
43157840 | 1167 | * - Device is reset when param is read. |
b12d437b | 1168 | * 2) A new device is supplied. |
43157840 | 1169 | * - No matching superblock found, resets device. |
b12d437b | 1170 | * 3) Device failure was transient and returns on reload. |
43157840 | 1171 | * - Failure noticed, resets device for bitmap replay. |
b12d437b | 1172 | * 4) Device hadn't completed recovery after previous failure. |
43157840 | 1173 | * - Superblock is read and overrides recovery_offset. |
b12d437b JB |
1174 | * |
1175 | * What is found in the superblocks of the devices is always | |
1176 | * authoritative, unless 'rebuild' or '[no]sync' was specified. | |
9d09e663 | 1177 | */ |
ffeeac75 | 1178 | for (i = 0; i < rs->raid_disks; i++) { |
9d09e663 | 1179 | set_bit(In_sync, &rs->dev[i].rdev.flags); |
b12d437b JB |
1180 | rs->dev[i].rdev.recovery_offset = MaxSector; |
1181 | } | |
9d09e663 | 1182 | |
b12d437b JB |
1183 | /* |
1184 | * Second, parse the unordered optional arguments | |
1185 | */ | |
9d09e663 | 1186 | for (i = 0; i < num_raid_params; i++) { |
4763e543 | 1187 | key = dm_shift_arg(as); |
bd83a4c4 MS |
1188 | if (!key) { |
1189 | rs->ti->error = "Not enough raid parameters given"; | |
1190 | return -EINVAL; | |
1191 | } | |
92c83d79 | 1192 | |
3fa6cf38 | 1193 | if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_NOSYNC))) { |
4286325b | 1194 | if (test_and_set_bit(__CTR_FLAG_NOSYNC, &rs->ctr_flags)) { |
bd83a4c4 MS |
1195 | rs->ti->error = "Only one 'nosync' argument allowed"; |
1196 | return -EINVAL; | |
1197 | } | |
9d09e663 N |
1198 | continue; |
1199 | } | |
3fa6cf38 | 1200 | if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_SYNC))) { |
4286325b | 1201 | if (test_and_set_bit(__CTR_FLAG_SYNC, &rs->ctr_flags)) { |
bd83a4c4 MS |
1202 | rs->ti->error = "Only one 'sync' argument allowed"; |
1203 | return -EINVAL; | |
1204 | } | |
4763e543 HM |
1205 | continue; |
1206 | } | |
3fa6cf38 | 1207 | if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_RAID10_USE_NEAR_SETS))) { |
4286325b | 1208 | if (test_and_set_bit(__CTR_FLAG_RAID10_USE_NEAR_SETS, &rs->ctr_flags)) { |
bd83a4c4 MS |
1209 | rs->ti->error = "Only one 'raid10_use_new_sets' argument allowed"; |
1210 | return -EINVAL; | |
1211 | } | |
9d09e663 N |
1212 | continue; |
1213 | } | |
1214 | ||
92c83d79 HM |
1215 | arg = dm_shift_arg(as); |
1216 | i++; /* Account for the argument pairs */ | |
bd83a4c4 MS |
1217 | if (!arg) { |
1218 | rs->ti->error = "Wrong number of raid parameters given"; | |
1219 | return -EINVAL; | |
1220 | } | |
63f33b8d | 1221 | |
702108d1 HM |
1222 | /* |
1223 | * Parameters that take a string value are checked here. | |
1224 | */ | |
63c32ed4 | 1225 | /* "raid10_format {near|offset|far} */ |
3fa6cf38 | 1226 | if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_RAID10_FORMAT))) { |
4286325b | 1227 | if (test_and_set_bit(__CTR_FLAG_RAID10_FORMAT, &rs->ctr_flags)) { |
bd83a4c4 MS |
1228 | rs->ti->error = "Only one 'raid10_format' argument pair allowed"; |
1229 | return -EINVAL; | |
1230 | } | |
1231 | if (!rt_is_raid10(rt)) { | |
1232 | rs->ti->error = "'raid10_format' is an invalid parameter for this RAID type"; | |
1233 | return -EINVAL; | |
1234 | } | |
33e53f06 | 1235 | raid10_format = raid10_name_to_format(arg); |
bd83a4c4 MS |
1236 | if (raid10_format < 0) { |
1237 | rs->ti->error = "Invalid 'raid10_format' value given"; | |
1238 | return raid10_format; | |
1239 | } | |
63f33b8d JB |
1240 | continue; |
1241 | } | |
1242 | ||
6e53636f | 1243 | /* "journal_dev <dev>" */ |
63c32ed4 HM |
1244 | if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_JOURNAL_DEV))) { |
1245 | int r; | |
1246 | struct md_rdev *jdev; | |
1247 | ||
1248 | if (test_and_set_bit(__CTR_FLAG_JOURNAL_DEV, &rs->ctr_flags)) { | |
1249 | rs->ti->error = "Only one raid4/5/6 set journaling device allowed"; | |
1250 | return -EINVAL; | |
1251 | } | |
1252 | if (!rt_is_raid456(rt)) { | |
1253 | rs->ti->error = "'journal_dev' is an invalid parameter for this RAID type"; | |
1254 | return -EINVAL; | |
1255 | } | |
1256 | r = dm_get_device(rs->ti, arg, dm_table_get_mode(rs->ti->table), | |
1257 | &rs->journal_dev.dev); | |
1258 | if (r) { | |
1259 | rs->ti->error = "raid4/5/6 journal device lookup failure"; | |
1260 | return r; | |
1261 | } | |
1262 | jdev = &rs->journal_dev.rdev; | |
1263 | md_rdev_init(jdev); | |
1264 | jdev->mddev = &rs->md; | |
1265 | jdev->bdev = rs->journal_dev.dev->bdev; | |
1266 | jdev->sectors = to_sector(i_size_read(jdev->bdev->bd_inode)); | |
1267 | if (jdev->sectors < MIN_RAID456_JOURNAL_SPACE) { | |
1268 | rs->ti->error = "No space for raid4/5/6 journal"; | |
1269 | return -ENOSPC; | |
1270 | } | |
6e53636f | 1271 | rs->journal_dev.mode = R5C_JOURNAL_MODE_WRITE_THROUGH; |
63c32ed4 HM |
1272 | set_bit(Journal, &jdev->flags); |
1273 | continue; | |
1274 | } | |
1275 | ||
6e53636f HM |
1276 | /* "journal_mode <mode>" ("journal_dev" mandatory!) */ |
1277 | if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_JOURNAL_MODE))) { | |
1278 | int r; | |
1279 | ||
1280 | if (!test_bit(__CTR_FLAG_JOURNAL_DEV, &rs->ctr_flags)) { | |
1281 | rs->ti->error = "raid4/5/6 'journal_mode' is invalid without 'journal_dev'"; | |
1282 | return -EINVAL; | |
1283 | } | |
1284 | if (test_and_set_bit(__CTR_FLAG_JOURNAL_MODE, &rs->ctr_flags)) { | |
1285 | rs->ti->error = "Only one raid4/5/6 'journal_mode' argument allowed"; | |
1286 | return -EINVAL; | |
1287 | } | |
1288 | r = dm_raid_journal_mode_to_md(arg); | |
1289 | if (r < 0) { | |
1290 | rs->ti->error = "Invalid 'journal_mode' argument"; | |
1291 | return r; | |
1292 | } | |
1293 | rs->journal_dev.mode = r; | |
1294 | continue; | |
1295 | } | |
1296 | ||
63c32ed4 HM |
1297 | /* |
1298 | * Parameters with number values from here on. | |
1299 | */ | |
9dbd1aa3 | 1300 | if (kstrtoint(arg, 10, &value) < 0) { |
bd83a4c4 MS |
1301 | rs->ti->error = "Bad numerical argument given in raid params"; |
1302 | return -EINVAL; | |
1303 | } | |
702108d1 | 1304 | |
3fa6cf38 | 1305 | if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_REBUILD))) { |
702108d1 HM |
1306 | /* |
1307 | * "rebuild" is being passed in by userspace to provide | |
1308 | * indexes of replaced devices and to set up additional | |
1309 | * devices on raid level takeover. | |
43157840 | 1310 | */ |
bb91a63f | 1311 | if (!__within_range(value, 0, rs->raid_disks - 1)) { |
bd83a4c4 MS |
1312 | rs->ti->error = "Invalid rebuild index given"; |
1313 | return -EINVAL; | |
1314 | } | |
702108d1 | 1315 | |
bd83a4c4 MS |
1316 | if (test_and_set_bit(value, (void *) rs->rebuild_disks)) { |
1317 | rs->ti->error = "rebuild for this index already given"; | |
1318 | return -EINVAL; | |
1319 | } | |
ecbfb9f1 | 1320 | |
702108d1 HM |
1321 | rd = rs->dev + value; |
1322 | clear_bit(In_sync, &rd->rdev.flags); | |
1323 | clear_bit(Faulty, &rd->rdev.flags); | |
1324 | rd->rdev.recovery_offset = 0; | |
4286325b | 1325 | set_bit(__CTR_FLAG_REBUILD, &rs->ctr_flags); |
3fa6cf38 | 1326 | } else if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_WRITE_MOSTLY))) { |
bd83a4c4 MS |
1327 | if (!rt_is_raid1(rt)) { |
1328 | rs->ti->error = "write_mostly option is only valid for RAID1"; | |
1329 | return -EINVAL; | |
1330 | } | |
702108d1 | 1331 | |
bb91a63f | 1332 | if (!__within_range(value, 0, rs->md.raid_disks - 1)) { |
bd83a4c4 MS |
1333 | rs->ti->error = "Invalid write_mostly index given"; |
1334 | return -EINVAL; | |
1335 | } | |
9d09e663 | 1336 | |
5fa146b2 | 1337 | write_mostly++; |
46bed2b5 | 1338 | set_bit(WriteMostly, &rs->dev[value].rdev.flags); |
4286325b | 1339 | set_bit(__CTR_FLAG_WRITE_MOSTLY, &rs->ctr_flags); |
3fa6cf38 | 1340 | } else if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_MAX_WRITE_BEHIND))) { |
bd83a4c4 MS |
1341 | if (!rt_is_raid1(rt)) { |
1342 | rs->ti->error = "max_write_behind option is only valid for RAID1"; | |
1343 | return -EINVAL; | |
1344 | } | |
702108d1 | 1345 | |
4286325b | 1346 | if (test_and_set_bit(__CTR_FLAG_MAX_WRITE_BEHIND, &rs->ctr_flags)) { |
bd83a4c4 MS |
1347 | rs->ti->error = "Only one max_write_behind argument pair allowed"; |
1348 | return -EINVAL; | |
1349 | } | |
9d09e663 N |
1350 | |
1351 | /* | |
1352 | * In device-mapper, we specify things in sectors, but | |
1353 | * MD records this value in kB | |
1354 | */ | |
13bc62d4 | 1355 | if (value < 0 || value / 2 > COUNTER_MAX) { |
bd83a4c4 MS |
1356 | rs->ti->error = "Max write-behind limit out of range"; |
1357 | return -EINVAL; | |
1358 | } | |
702108d1 | 1359 | |
13bc62d4 | 1360 | rs->md.bitmap_info.max_write_behind = value / 2; |
3fa6cf38 | 1361 | } else if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_DAEMON_SLEEP))) { |
4286325b | 1362 | if (test_and_set_bit(__CTR_FLAG_DAEMON_SLEEP, &rs->ctr_flags)) { |
bd83a4c4 MS |
1363 | rs->ti->error = "Only one daemon_sleep argument pair allowed"; |
1364 | return -EINVAL; | |
1365 | } | |
13bc62d4 | 1366 | if (value < 0) { |
bd83a4c4 MS |
1367 | rs->ti->error = "daemon sleep period out of range"; |
1368 | return -EINVAL; | |
1369 | } | |
9d09e663 | 1370 | rs->md.bitmap_info.daemon_sleep = value; |
3fa6cf38 | 1371 | } else if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_DATA_OFFSET))) { |
4763e543 | 1372 | /* Userspace passes new data_offset after having extended the the data image LV */ |
4286325b | 1373 | if (test_and_set_bit(__CTR_FLAG_DATA_OFFSET, &rs->ctr_flags)) { |
bd83a4c4 MS |
1374 | rs->ti->error = "Only one data_offset argument pair allowed"; |
1375 | return -EINVAL; | |
1376 | } | |
4763e543 | 1377 | /* Ensure sensible data offset */ |
75dd3b9e HM |
1378 | if (value < 0 || |
1379 | (value && (value < MIN_FREE_RESHAPE_SPACE || value % to_sector(PAGE_SIZE)))) { | |
bd83a4c4 MS |
1380 | rs->ti->error = "Bogus data_offset value"; |
1381 | return -EINVAL; | |
1382 | } | |
4763e543 | 1383 | rs->data_offset = value; |
3fa6cf38 | 1384 | } else if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_DELTA_DISKS))) { |
4763e543 | 1385 | /* Define the +/-# of disks to add to/remove from the given raid set */ |
4286325b | 1386 | if (test_and_set_bit(__CTR_FLAG_DELTA_DISKS, &rs->ctr_flags)) { |
bd83a4c4 MS |
1387 | rs->ti->error = "Only one delta_disks argument pair allowed"; |
1388 | return -EINVAL; | |
1389 | } | |
4763e543 | 1390 | /* Ensure MAX_RAID_DEVICES and raid type minimal_devs! */ |
bb91a63f | 1391 | if (!__within_range(abs(value), 1, MAX_RAID_DEVICES - rt->minimal_devs)) { |
bd83a4c4 MS |
1392 | rs->ti->error = "Too many delta_disk requested"; |
1393 | return -EINVAL; | |
1394 | } | |
4763e543 HM |
1395 | |
1396 | rs->delta_disks = value; | |
3fa6cf38 | 1397 | } else if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_STRIPE_CACHE))) { |
4286325b | 1398 | if (test_and_set_bit(__CTR_FLAG_STRIPE_CACHE, &rs->ctr_flags)) { |
bd83a4c4 MS |
1399 | rs->ti->error = "Only one stripe_cache argument pair allowed"; |
1400 | return -EINVAL; | |
1401 | } | |
1402 | ||
bd83a4c4 MS |
1403 | if (!rt_is_raid456(rt)) { |
1404 | rs->ti->error = "Inappropriate argument: stripe_cache"; | |
1405 | return -EINVAL; | |
1406 | } | |
702108d1 | 1407 | |
13bc62d4 HM |
1408 | if (value < 0) { |
1409 | rs->ti->error = "Bogus stripe cache entries value"; | |
1410 | return -EINVAL; | |
1411 | } | |
9dbd1aa3 | 1412 | rs->stripe_cache_entries = value; |
3fa6cf38 | 1413 | } else if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_MIN_RECOVERY_RATE))) { |
4286325b | 1414 | if (test_and_set_bit(__CTR_FLAG_MIN_RECOVERY_RATE, &rs->ctr_flags)) { |
bd83a4c4 MS |
1415 | rs->ti->error = "Only one min_recovery_rate argument pair allowed"; |
1416 | return -EINVAL; | |
1417 | } | |
13bc62d4 HM |
1418 | |
1419 | if (value < 0) { | |
bd83a4c4 MS |
1420 | rs->ti->error = "min_recovery_rate out of range"; |
1421 | return -EINVAL; | |
1422 | } | |
13bc62d4 | 1423 | rs->md.sync_speed_min = value; |
3fa6cf38 | 1424 | } else if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_MAX_RECOVERY_RATE))) { |
f15f64d6 | 1425 | if (test_and_set_bit(__CTR_FLAG_MAX_RECOVERY_RATE, &rs->ctr_flags)) { |
bd83a4c4 MS |
1426 | rs->ti->error = "Only one max_recovery_rate argument pair allowed"; |
1427 | return -EINVAL; | |
1428 | } | |
13bc62d4 HM |
1429 | |
1430 | if (value < 0) { | |
bd83a4c4 MS |
1431 | rs->ti->error = "max_recovery_rate out of range"; |
1432 | return -EINVAL; | |
1433 | } | |
13bc62d4 | 1434 | rs->md.sync_speed_max = value; |
3fa6cf38 | 1435 | } else if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_REGION_SIZE))) { |
4286325b | 1436 | if (test_and_set_bit(__CTR_FLAG_REGION_SIZE, &rs->ctr_flags)) { |
bd83a4c4 MS |
1437 | rs->ti->error = "Only one region_size argument pair allowed"; |
1438 | return -EINVAL; | |
1439 | } | |
702108d1 | 1440 | |
c1084561 | 1441 | region_size = value; |
4257e085 | 1442 | rs->requested_bitmap_chunk_sectors = value; |
3fa6cf38 | 1443 | } else if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_RAID10_COPIES))) { |
4286325b | 1444 | if (test_and_set_bit(__CTR_FLAG_RAID10_COPIES, &rs->ctr_flags)) { |
bd83a4c4 MS |
1445 | rs->ti->error = "Only one raid10_copies argument pair allowed"; |
1446 | return -EINVAL; | |
1447 | } | |
702108d1 | 1448 | |
bb91a63f | 1449 | if (!__within_range(value, 2, rs->md.raid_disks)) { |
bd83a4c4 MS |
1450 | rs->ti->error = "Bad value for 'raid10_copies'"; |
1451 | return -EINVAL; | |
1452 | } | |
702108d1 | 1453 | |
63f33b8d | 1454 | raid10_copies = value; |
9d09e663 N |
1455 | } else { |
1456 | DMERR("Unable to parse RAID parameter: %s", key); | |
bd83a4c4 MS |
1457 | rs->ti->error = "Unable to parse RAID parameter"; |
1458 | return -EINVAL; | |
9d09e663 N |
1459 | } |
1460 | } | |
1461 | ||
0d851d14 HM |
1462 | if (test_bit(__CTR_FLAG_SYNC, &rs->ctr_flags) && |
1463 | test_bit(__CTR_FLAG_NOSYNC, &rs->ctr_flags)) { | |
1464 | rs->ti->error = "sync and nosync are mutually exclusive"; | |
1465 | return -EINVAL; | |
1466 | } | |
1467 | ||
37f10be1 HM |
1468 | if (test_bit(__CTR_FLAG_REBUILD, &rs->ctr_flags) && |
1469 | (test_bit(__CTR_FLAG_SYNC, &rs->ctr_flags) || | |
1470 | test_bit(__CTR_FLAG_NOSYNC, &rs->ctr_flags))) { | |
1471 | rs->ti->error = "sync/nosync and rebuild are mutually exclusive"; | |
1472 | return -EINVAL; | |
1473 | } | |
1474 | ||
5fa146b2 HM |
1475 | if (write_mostly >= rs->md.raid_disks) { |
1476 | rs->ti->error = "Can't set all raid1 devices to write_mostly"; | |
1477 | return -EINVAL; | |
1478 | } | |
1479 | ||
13bc62d4 HM |
1480 | if (rs->md.sync_speed_max && |
1481 | rs->md.sync_speed_min > rs->md.sync_speed_max) { | |
1482 | rs->ti->error = "Bogus recovery rates"; | |
1483 | return -EINVAL; | |
1484 | } | |
1485 | ||
c1084561 JB |
1486 | if (validate_region_size(rs, region_size)) |
1487 | return -EINVAL; | |
1488 | ||
1489 | if (rs->md.chunk_sectors) | |
542f9038 | 1490 | max_io_len = rs->md.chunk_sectors; |
c1084561 | 1491 | else |
542f9038 | 1492 | max_io_len = region_size; |
c1084561 | 1493 | |
542f9038 MS |
1494 | if (dm_set_target_max_io_len(rs->ti, max_io_len)) |
1495 | return -EINVAL; | |
32737279 | 1496 | |
33e53f06 | 1497 | if (rt_is_raid10(rt)) { |
bd83a4c4 MS |
1498 | if (raid10_copies > rs->md.raid_disks) { |
1499 | rs->ti->error = "Not enough devices to satisfy specification"; | |
1500 | return -EINVAL; | |
1501 | } | |
63f33b8d | 1502 | |
33e53f06 | 1503 | rs->md.new_layout = raid10_format_to_md_layout(rs, raid10_format, raid10_copies); |
bd83a4c4 MS |
1504 | if (rs->md.new_layout < 0) { |
1505 | rs->ti->error = "Error getting raid10 format"; | |
1506 | return rs->md.new_layout; | |
1507 | } | |
33e53f06 HM |
1508 | |
1509 | rt = get_raid_type_by_ll(10, rs->md.new_layout); | |
bd83a4c4 MS |
1510 | if (!rt) { |
1511 | rs->ti->error = "Failed to recognize new raid10 layout"; | |
1512 | return -EINVAL; | |
1513 | } | |
33e53f06 HM |
1514 | |
1515 | if ((rt->algorithm == ALGORITHM_RAID10_DEFAULT || | |
1516 | rt->algorithm == ALGORITHM_RAID10_NEAR) && | |
4286325b | 1517 | test_bit(__CTR_FLAG_RAID10_USE_NEAR_SETS, &rs->ctr_flags)) { |
bd83a4c4 MS |
1518 | rs->ti->error = "RAID10 format 'near' and 'raid10_use_near_sets' are incompatible"; |
1519 | return -EINVAL; | |
1520 | } | |
bd83a4c4 | 1521 | } |
702108d1 | 1522 | |
33e53f06 | 1523 | rs->raid10_copies = raid10_copies; |
c039c332 | 1524 | |
9d09e663 N |
1525 | /* Assume there are no metadata devices until the drives are parsed */ |
1526 | rs->md.persistent = 0; | |
1527 | rs->md.external = 1; | |
1528 | ||
f090279e | 1529 | /* Check, if any invalid ctr arguments have been passed in for the raid level */ |
a30cbc0d | 1530 | return rs_check_for_valid_flags(rs); |
9d09e663 N |
1531 | } |
1532 | ||
9dbd1aa3 HM |
1533 | /* Set raid4/5/6 cache size */ |
1534 | static int rs_set_raid456_stripe_cache(struct raid_set *rs) | |
1535 | { | |
1536 | int r; | |
1537 | struct r5conf *conf; | |
1538 | struct mddev *mddev = &rs->md; | |
1539 | uint32_t min_stripes = max(mddev->chunk_sectors, mddev->new_chunk_sectors) / 2; | |
1540 | uint32_t nr_stripes = rs->stripe_cache_entries; | |
1541 | ||
1542 | if (!rt_is_raid456(rs->raid_type)) { | |
1543 | rs->ti->error = "Inappropriate raid level; cannot change stripe_cache size"; | |
1544 | return -EINVAL; | |
1545 | } | |
1546 | ||
1547 | if (nr_stripes < min_stripes) { | |
1548 | DMINFO("Adjusting requested %u stripe cache entries to %u to suit stripe size", | |
1549 | nr_stripes, min_stripes); | |
1550 | nr_stripes = min_stripes; | |
1551 | } | |
1552 | ||
1553 | conf = mddev->private; | |
1554 | if (!conf) { | |
1555 | rs->ti->error = "Cannot change stripe_cache size on inactive RAID set"; | |
1556 | return -EINVAL; | |
1557 | } | |
1558 | ||
1559 | /* Try setting number of stripes in raid456 stripe cache */ | |
1560 | if (conf->min_nr_stripes != nr_stripes) { | |
1561 | r = raid5_set_cache_size(mddev, nr_stripes); | |
1562 | if (r) { | |
1563 | rs->ti->error = "Failed to set raid4/5/6 stripe cache size"; | |
1564 | return r; | |
1565 | } | |
1566 | ||
1567 | DMINFO("%u stripe cache entries", nr_stripes); | |
1568 | } | |
1569 | ||
1570 | return 0; | |
1571 | } | |
1572 | ||
3a1c1ef2 HM |
1573 | /* Return # of data stripes as kept in mddev as of @rs (i.e. as of superblock) */ |
1574 | static unsigned int mddev_data_stripes(struct raid_set *rs) | |
1575 | { | |
1576 | return rs->md.raid_disks - rs->raid_type->parity_devs; | |
1577 | } | |
1578 | ||
40ba37e5 HM |
1579 | /* Return # of data stripes of @rs (i.e. as of ctr) */ |
1580 | static unsigned int rs_data_stripes(struct raid_set *rs) | |
1581 | { | |
1582 | return rs->raid_disks - rs->raid_type->parity_devs; | |
1583 | } | |
1584 | ||
50c4feb9 HM |
1585 | /* |
1586 | * Retrieve rdev->sectors from any valid raid device of @rs | |
1587 | * to allow userpace to pass in arbitray "- -" device tupples. | |
1588 | */ | |
1589 | static sector_t __rdev_sectors(struct raid_set *rs) | |
1590 | { | |
1591 | int i; | |
1592 | ||
1593 | for (i = 0; i < rs->md.raid_disks; i++) { | |
1594 | struct md_rdev *rdev = &rs->dev[i].rdev; | |
1595 | ||
63c32ed4 HM |
1596 | if (!test_bit(Journal, &rdev->flags) && |
1597 | rdev->bdev && rdev->sectors) | |
50c4feb9 HM |
1598 | return rdev->sectors; |
1599 | } | |
1600 | ||
4d49f1b4 | 1601 | return 0; |
50c4feb9 HM |
1602 | } |
1603 | ||
188a212d HM |
1604 | /* Check that calculated dev_sectors fits all component devices. */ |
1605 | static int _check_data_dev_sectors(struct raid_set *rs) | |
1606 | { | |
1607 | sector_t ds = ~0; | |
1608 | struct md_rdev *rdev; | |
1609 | ||
1610 | rdev_for_each(rdev, &rs->md) | |
1611 | if (!test_bit(Journal, &rdev->flags) && rdev->bdev) { | |
1612 | ds = min(ds, to_sector(i_size_read(rdev->bdev->bd_inode))); | |
1613 | if (ds < rs->md.dev_sectors) { | |
1614 | rs->ti->error = "Component device(s) too small"; | |
1615 | return -EINVAL; | |
1616 | } | |
1617 | } | |
1618 | ||
1619 | return 0; | |
1620 | } | |
1621 | ||
40ba37e5 | 1622 | /* Calculate the sectors per device and per array used for @rs */ |
22c992e1 | 1623 | static int rs_set_dev_and_array_sectors(struct raid_set *rs, sector_t sectors, bool use_mddev) |
40ba37e5 HM |
1624 | { |
1625 | int delta_disks; | |
1626 | unsigned int data_stripes; | |
22c992e1 | 1627 | sector_t array_sectors = sectors, dev_sectors = sectors; |
40ba37e5 | 1628 | struct mddev *mddev = &rs->md; |
40ba37e5 HM |
1629 | |
1630 | if (use_mddev) { | |
1631 | delta_disks = mddev->delta_disks; | |
1632 | data_stripes = mddev_data_stripes(rs); | |
1633 | } else { | |
1634 | delta_disks = rs->delta_disks; | |
1635 | data_stripes = rs_data_stripes(rs); | |
1636 | } | |
1637 | ||
1638 | /* Special raid1 case w/o delta_disks support (yet) */ | |
1639 | if (rt_is_raid1(rs->raid_type)) | |
1640 | ; | |
1641 | else if (rt_is_raid10(rs->raid_type)) { | |
1642 | if (rs->raid10_copies < 2 || | |
1643 | delta_disks < 0) { | |
1644 | rs->ti->error = "Bogus raid10 data copies or delta disks"; | |
094f394d | 1645 | return -EINVAL; |
40ba37e5 HM |
1646 | } |
1647 | ||
1648 | dev_sectors *= rs->raid10_copies; | |
1649 | if (sector_div(dev_sectors, data_stripes)) | |
1650 | goto bad; | |
1651 | ||
1652 | array_sectors = (data_stripes + delta_disks) * dev_sectors; | |
1653 | if (sector_div(array_sectors, rs->raid10_copies)) | |
1654 | goto bad; | |
1655 | ||
1656 | } else if (sector_div(dev_sectors, data_stripes)) | |
1657 | goto bad; | |
1658 | ||
1659 | else | |
1660 | /* Striped layouts */ | |
1661 | array_sectors = (data_stripes + delta_disks) * dev_sectors; | |
1662 | ||
40ba37e5 HM |
1663 | mddev->array_sectors = array_sectors; |
1664 | mddev->dev_sectors = dev_sectors; | |
22c992e1 | 1665 | rs_set_rdev_sectors(rs); |
40ba37e5 | 1666 | |
188a212d | 1667 | return _check_data_dev_sectors(rs); |
40ba37e5 HM |
1668 | bad: |
1669 | rs->ti->error = "Target length not divisible by number of data devices"; | |
094f394d | 1670 | return -EINVAL; |
40ba37e5 HM |
1671 | } |
1672 | ||
4dff2f1e | 1673 | /* Setup recovery on @rs */ |
f9f3ee91 | 1674 | static void rs_setup_recovery(struct raid_set *rs, sector_t dev_sectors) |
4dff2f1e HM |
1675 | { |
1676 | /* raid0 does not recover */ | |
1677 | if (rs_is_raid0(rs)) | |
1678 | rs->md.recovery_cp = MaxSector; | |
1679 | /* | |
1680 | * A raid6 set has to be recovered either | |
1681 | * completely or for the grown part to | |
1682 | * ensure proper parity and Q-Syndrome | |
1683 | */ | |
1684 | else if (rs_is_raid6(rs)) | |
1685 | rs->md.recovery_cp = dev_sectors; | |
1686 | /* | |
1687 | * Other raid set types may skip recovery | |
1688 | * depending on the 'nosync' flag. | |
1689 | */ | |
1690 | else | |
1691 | rs->md.recovery_cp = test_bit(__CTR_FLAG_NOSYNC, &rs->ctr_flags) | |
1692 | ? MaxSector : dev_sectors; | |
1693 | } | |
1694 | ||
9d09e663 N |
1695 | static void do_table_event(struct work_struct *ws) |
1696 | { | |
1697 | struct raid_set *rs = container_of(ws, struct raid_set, md.event_work); | |
1698 | ||
9d9d939c | 1699 | smp_rmb(); /* Make sure we access most actual mddev properties */ |
61e06e2c HM |
1700 | if (!rs_is_reshaping(rs)) { |
1701 | if (rs_is_raid10(rs)) | |
1702 | rs_set_rdev_sectors(rs); | |
9d9d939c | 1703 | rs_set_capacity(rs); |
61e06e2c | 1704 | } |
9d09e663 N |
1705 | dm_table_event(rs->ti->table); |
1706 | } | |
1707 | ||
1708 | static int raid_is_congested(struct dm_target_callbacks *cb, int bits) | |
1709 | { | |
1710 | struct raid_set *rs = container_of(cb, struct raid_set, callbacks); | |
1711 | ||
5c675f83 | 1712 | return mddev_congested(&rs->md, bits); |
9d09e663 N |
1713 | } |
1714 | ||
ecbfb9f1 HM |
1715 | /* |
1716 | * Make sure a valid takover (level switch) is being requested on @rs | |
1717 | * | |
1718 | * Conversions of raid sets from one MD personality to another | |
1719 | * have to conform to restrictions which are enforced here. | |
ecbfb9f1 HM |
1720 | */ |
1721 | static int rs_check_takeover(struct raid_set *rs) | |
1722 | { | |
1723 | struct mddev *mddev = &rs->md; | |
1724 | unsigned int near_copies; | |
1725 | ||
9dbd1aa3 HM |
1726 | if (rs->md.degraded) { |
1727 | rs->ti->error = "Can't takeover degraded raid set"; | |
1728 | return -EPERM; | |
1729 | } | |
1730 | ||
1731 | if (rs_is_reshaping(rs)) { | |
1732 | rs->ti->error = "Can't takeover reshaping raid set"; | |
1733 | return -EPERM; | |
1734 | } | |
1735 | ||
ecbfb9f1 HM |
1736 | switch (mddev->level) { |
1737 | case 0: | |
1738 | /* raid0 -> raid1/5 with one disk */ | |
1739 | if ((mddev->new_level == 1 || mddev->new_level == 5) && | |
1740 | mddev->raid_disks == 1) | |
1741 | return 0; | |
1742 | ||
1743 | /* raid0 -> raid10 */ | |
1744 | if (mddev->new_level == 10 && | |
9dbd1aa3 | 1745 | !(rs->raid_disks % mddev->raid_disks)) |
ecbfb9f1 HM |
1746 | return 0; |
1747 | ||
1748 | /* raid0 with multiple disks -> raid4/5/6 */ | |
bb91a63f | 1749 | if (__within_range(mddev->new_level, 4, 6) && |
ecbfb9f1 HM |
1750 | mddev->new_layout == ALGORITHM_PARITY_N && |
1751 | mddev->raid_disks > 1) | |
1752 | return 0; | |
1753 | ||
1754 | break; | |
1755 | ||
1756 | case 10: | |
1757 | /* Can't takeover raid10_offset! */ | |
e6ca5e1a | 1758 | if (__is_raid10_offset(mddev->layout)) |
ecbfb9f1 HM |
1759 | break; |
1760 | ||
e6ca5e1a | 1761 | near_copies = __raid10_near_copies(mddev->layout); |
ecbfb9f1 HM |
1762 | |
1763 | /* raid10* -> raid0 */ | |
1764 | if (mddev->new_level == 0) { | |
1765 | /* Can takeover raid10_near with raid disks divisable by data copies! */ | |
1766 | if (near_copies > 1 && | |
1767 | !(mddev->raid_disks % near_copies)) { | |
1768 | mddev->raid_disks /= near_copies; | |
1769 | mddev->delta_disks = mddev->raid_disks; | |
1770 | return 0; | |
1771 | } | |
1772 | ||
1773 | /* Can takeover raid10_far */ | |
1774 | if (near_copies == 1 && | |
e6ca5e1a | 1775 | __raid10_far_copies(mddev->layout) > 1) |
ecbfb9f1 HM |
1776 | return 0; |
1777 | ||
1778 | break; | |
1779 | } | |
1780 | ||
1781 | /* raid10_{near,far} -> raid1 */ | |
1782 | if (mddev->new_level == 1 && | |
e6ca5e1a | 1783 | max(near_copies, __raid10_far_copies(mddev->layout)) == mddev->raid_disks) |
ecbfb9f1 HM |
1784 | return 0; |
1785 | ||
1786 | /* raid10_{near,far} with 2 disks -> raid4/5 */ | |
bb91a63f | 1787 | if (__within_range(mddev->new_level, 4, 5) && |
ecbfb9f1 HM |
1788 | mddev->raid_disks == 2) |
1789 | return 0; | |
1790 | break; | |
1791 | ||
1792 | case 1: | |
1793 | /* raid1 with 2 disks -> raid4/5 */ | |
bb91a63f | 1794 | if (__within_range(mddev->new_level, 4, 5) && |
ecbfb9f1 HM |
1795 | mddev->raid_disks == 2) { |
1796 | mddev->degraded = 1; | |
1797 | return 0; | |
1798 | } | |
1799 | ||
1800 | /* raid1 -> raid0 */ | |
1801 | if (mddev->new_level == 0 && | |
1802 | mddev->raid_disks == 1) | |
1803 | return 0; | |
1804 | ||
1805 | /* raid1 -> raid10 */ | |
1806 | if (mddev->new_level == 10) | |
1807 | return 0; | |
ecbfb9f1 HM |
1808 | break; |
1809 | ||
1810 | case 4: | |
1811 | /* raid4 -> raid0 */ | |
1812 | if (mddev->new_level == 0) | |
1813 | return 0; | |
1814 | ||
1815 | /* raid4 -> raid1/5 with 2 disks */ | |
1816 | if ((mddev->new_level == 1 || mddev->new_level == 5) && | |
1817 | mddev->raid_disks == 2) | |
1818 | return 0; | |
1819 | ||
1820 | /* raid4 -> raid5/6 with parity N */ | |
bb91a63f | 1821 | if (__within_range(mddev->new_level, 5, 6) && |
ecbfb9f1 HM |
1822 | mddev->layout == ALGORITHM_PARITY_N) |
1823 | return 0; | |
1824 | break; | |
1825 | ||
1826 | case 5: | |
1827 | /* raid5 with parity N -> raid0 */ | |
1828 | if (mddev->new_level == 0 && | |
1829 | mddev->layout == ALGORITHM_PARITY_N) | |
1830 | return 0; | |
1831 | ||
1832 | /* raid5 with parity N -> raid4 */ | |
1833 | if (mddev->new_level == 4 && | |
1834 | mddev->layout == ALGORITHM_PARITY_N) | |
1835 | return 0; | |
1836 | ||
1837 | /* raid5 with 2 disks -> raid1/4/10 */ | |
1838 | if ((mddev->new_level == 1 || mddev->new_level == 4 || mddev->new_level == 10) && | |
1839 | mddev->raid_disks == 2) | |
1840 | return 0; | |
1841 | ||
6ee0bae9 | 1842 | /* raid5_* -> raid6_*_6 with Q-Syndrome N (e.g. raid5_ra -> raid6_ra_6 */ |
ecbfb9f1 HM |
1843 | if (mddev->new_level == 6 && |
1844 | ((mddev->layout == ALGORITHM_PARITY_N && mddev->new_layout == ALGORITHM_PARITY_N) || | |
bb91a63f | 1845 | __within_range(mddev->new_layout, ALGORITHM_LEFT_ASYMMETRIC_6, ALGORITHM_RIGHT_SYMMETRIC_6))) |
ecbfb9f1 HM |
1846 | return 0; |
1847 | break; | |
1848 | ||
1849 | case 6: | |
1850 | /* raid6 with parity N -> raid0 */ | |
1851 | if (mddev->new_level == 0 && | |
1852 | mddev->layout == ALGORITHM_PARITY_N) | |
1853 | return 0; | |
1854 | ||
1855 | /* raid6 with parity N -> raid4 */ | |
1856 | if (mddev->new_level == 4 && | |
1857 | mddev->layout == ALGORITHM_PARITY_N) | |
1858 | return 0; | |
1859 | ||
6ee0bae9 | 1860 | /* raid6_*_n with Q-Syndrome N -> raid5_* */ |
ecbfb9f1 HM |
1861 | if (mddev->new_level == 5 && |
1862 | ((mddev->layout == ALGORITHM_PARITY_N && mddev->new_layout == ALGORITHM_PARITY_N) || | |
bb91a63f | 1863 | __within_range(mddev->new_layout, ALGORITHM_LEFT_ASYMMETRIC, ALGORITHM_RIGHT_SYMMETRIC))) |
ecbfb9f1 HM |
1864 | return 0; |
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 | ||
40ba37e5 HM |
1880 | /* True if @rs is requested to reshape by ctr */ |
1881 | static bool rs_reshape_requested(struct raid_set *rs) | |
1882 | { | |
469b304b | 1883 | bool change; |
40ba37e5 HM |
1884 | struct mddev *mddev = &rs->md; |
1885 | ||
469b304b HM |
1886 | if (rs_takeover_requested(rs)) |
1887 | return false; | |
1888 | ||
552aa679 | 1889 | if (rs_is_raid0(rs)) |
40ba37e5 HM |
1890 | return false; |
1891 | ||
469b304b HM |
1892 | change = mddev->new_layout != mddev->layout || |
1893 | mddev->new_chunk_sectors != mddev->chunk_sectors || | |
1894 | rs->delta_disks; | |
1895 | ||
1896 | /* Historical case to support raid1 reshape without delta disks */ | |
552aa679 | 1897 | if (rs_is_raid1(rs)) { |
7a7c330f HM |
1898 | if (rs->delta_disks) |
1899 | return !!rs->delta_disks; | |
1900 | ||
469b304b HM |
1901 | return !change && |
1902 | mddev->raid_disks != rs->raid_disks; | |
7a7c330f | 1903 | } |
469b304b | 1904 | |
552aa679 | 1905 | if (rs_is_raid10(rs)) |
469b304b HM |
1906 | return change && |
1907 | !__is_raid10_far(mddev->new_layout) && | |
1908 | rs->delta_disks >= 0; | |
1909 | ||
1910 | return change; | |
40ba37e5 HM |
1911 | } |
1912 | ||
33e53f06 | 1913 | /* Features */ |
9b6e5423 | 1914 | #define FEATURE_FLAG_SUPPORTS_V190 0x1 /* Supports extended superblock */ |
33e53f06 HM |
1915 | |
1916 | /* State flags for sb->flags */ | |
1917 | #define SB_FLAG_RESHAPE_ACTIVE 0x1 | |
1918 | #define SB_FLAG_RESHAPE_BACKWARDS 0x2 | |
1919 | ||
b12d437b JB |
1920 | /* |
1921 | * This structure is never routinely used by userspace, unlike md superblocks. | |
1922 | * Devices with this superblock should only ever be accessed via device-mapper. | |
1923 | */ | |
1924 | #define DM_RAID_MAGIC 0x64526D44 | |
1925 | struct dm_raid_superblock { | |
1926 | __le32 magic; /* "DmRd" */ | |
9b6e5423 | 1927 | __le32 compat_features; /* Used to indicate compatible features (like 1.9.0 ondisk metadata extension) */ |
b12d437b | 1928 | |
33e53f06 HM |
1929 | __le32 num_devices; /* Number of devices in this raid set. (Max 64) */ |
1930 | __le32 array_position; /* The position of this drive in the raid set */ | |
b12d437b JB |
1931 | |
1932 | __le64 events; /* Incremented by md when superblock updated */ | |
9b6e5423 | 1933 | __le64 failed_devices; /* Pre 1.9.0 part of bit field of devices to */ |
33e53f06 | 1934 | /* indicate failures (see extension below) */ |
b12d437b JB |
1935 | |
1936 | /* | |
1937 | * This offset tracks the progress of the repair or replacement of | |
1938 | * an individual drive. | |
1939 | */ | |
1940 | __le64 disk_recovery_offset; | |
1941 | ||
1942 | /* | |
33e53f06 | 1943 | * This offset tracks the progress of the initial raid set |
b12d437b JB |
1944 | * synchronisation/parity calculation. |
1945 | */ | |
1946 | __le64 array_resync_offset; | |
1947 | ||
1948 | /* | |
33e53f06 | 1949 | * raid characteristics |
b12d437b JB |
1950 | */ |
1951 | __le32 level; | |
1952 | __le32 layout; | |
1953 | __le32 stripe_sectors; | |
1954 | ||
33e53f06 | 1955 | /******************************************************************** |
9b6e5423 | 1956 | * BELOW FOLLOW V1.9.0 EXTENSIONS TO THE PRISTINE SUPERBLOCK FORMAT!!! |
33e53f06 | 1957 | * |
c4d097d1 | 1958 | * FEATURE_FLAG_SUPPORTS_V190 in the compat_features member indicates that those exist |
33e53f06 HM |
1959 | */ |
1960 | ||
1961 | __le32 flags; /* Flags defining array states for reshaping */ | |
1962 | ||
1963 | /* | |
1964 | * This offset tracks the progress of a raid | |
1965 | * set reshape in order to be able to restart it | |
1966 | */ | |
1967 | __le64 reshape_position; | |
1968 | ||
1969 | /* | |
1970 | * These define the properties of the array in case of an interrupted reshape | |
1971 | */ | |
1972 | __le32 new_level; | |
1973 | __le32 new_layout; | |
1974 | __le32 new_stripe_sectors; | |
1975 | __le32 delta_disks; | |
1976 | ||
1977 | __le64 array_sectors; /* Array size in sectors */ | |
1978 | ||
1979 | /* | |
1980 | * Sector offsets to data on devices (reshaping). | |
1981 | * Needed to support out of place reshaping, thus | |
1982 | * not writing over any stripes whilst converting | |
1983 | * them from old to new layout | |
1984 | */ | |
1985 | __le64 data_offset; | |
1986 | __le64 new_data_offset; | |
1987 | ||
1988 | __le64 sectors; /* Used device size in sectors */ | |
1989 | ||
1990 | /* | |
1991 | * Additonal Bit field of devices indicating failures to support | |
9b6e5423 | 1992 | * up to 256 devices with the 1.9.0 on-disk metadata format |
33e53f06 HM |
1993 | */ |
1994 | __le64 extended_failed_devices[DISKS_ARRAY_ELEMS - 1]; | |
1995 | ||
1996 | __le32 incompat_features; /* Used to indicate any incompatible features */ | |
1997 | ||
1998 | /* Always set rest up to logical block size to 0 when writing (see get_metadata_device() below). */ | |
b12d437b JB |
1999 | } __packed; |
2000 | ||
9dbd1aa3 HM |
2001 | /* |
2002 | * Check for reshape constraints on raid set @rs: | |
2003 | * | |
2004 | * - reshape function non-existent | |
2005 | * - degraded set | |
2006 | * - ongoing recovery | |
2007 | * - ongoing reshape | |
2008 | * | |
2009 | * Returns 0 if none or -EPERM if given constraint | |
2010 | * and error message reference in @errmsg | |
2011 | */ | |
2012 | static int rs_check_reshape(struct raid_set *rs) | |
2013 | { | |
2014 | struct mddev *mddev = &rs->md; | |
2015 | ||
9dbd1aa3 HM |
2016 | if (!mddev->pers || !mddev->pers->check_reshape) |
2017 | rs->ti->error = "Reshape not supported"; | |
2018 | else if (mddev->degraded) | |
2019 | rs->ti->error = "Can't reshape degraded raid set"; | |
2020 | else if (rs_is_recovering(rs)) | |
2021 | rs->ti->error = "Convert request on recovering raid set prohibited"; | |
469b304b | 2022 | else if (rs_is_reshaping(rs)) |
9dbd1aa3 | 2023 | rs->ti->error = "raid set already reshaping!"; |
7a7c330f HM |
2024 | else if (!(rs_is_raid1(rs) || rs_is_raid10(rs) || rs_is_raid456(rs))) |
2025 | rs->ti->error = "Reshaping only supported for raid1/4/5/6/10"; | |
9dbd1aa3 HM |
2026 | else |
2027 | return 0; | |
2028 | ||
2029 | return -EPERM; | |
2030 | } | |
2031 | ||
e2568465 | 2032 | static int read_disk_sb(struct md_rdev *rdev, int size, bool force_reload) |
b12d437b JB |
2033 | { |
2034 | BUG_ON(!rdev->sb_page); | |
2035 | ||
e2568465 | 2036 | if (rdev->sb_loaded && !force_reload) |
b12d437b JB |
2037 | return 0; |
2038 | ||
e2568465 HM |
2039 | rdev->sb_loaded = 0; |
2040 | ||
0a7b8188 | 2041 | if (!sync_page_io(rdev, 0, size, rdev->sb_page, REQ_OP_READ, 0, true)) { |
0447568f JB |
2042 | DMERR("Failed to read superblock of device at position %d", |
2043 | rdev->raid_disk); | |
c32fb9e7 | 2044 | md_error(rdev->mddev, rdev); |
e2568465 HM |
2045 | set_bit(Faulty, &rdev->flags); |
2046 | return -EIO; | |
b12d437b JB |
2047 | } |
2048 | ||
2049 | rdev->sb_loaded = 1; | |
2050 | ||
2051 | return 0; | |
2052 | } | |
2053 | ||
33e53f06 HM |
2054 | static void sb_retrieve_failed_devices(struct dm_raid_superblock *sb, uint64_t *failed_devices) |
2055 | { | |
2056 | failed_devices[0] = le64_to_cpu(sb->failed_devices); | |
2057 | memset(failed_devices + 1, 0, sizeof(sb->extended_failed_devices)); | |
2058 | ||
4286325b | 2059 | if (le32_to_cpu(sb->compat_features) & FEATURE_FLAG_SUPPORTS_V190) { |
33e53f06 HM |
2060 | int i = ARRAY_SIZE(sb->extended_failed_devices); |
2061 | ||
2062 | while (i--) | |
2063 | failed_devices[i+1] = le64_to_cpu(sb->extended_failed_devices[i]); | |
2064 | } | |
2065 | } | |
2066 | ||
7b34df74 HM |
2067 | static void sb_update_failed_devices(struct dm_raid_superblock *sb, uint64_t *failed_devices) |
2068 | { | |
2069 | int i = ARRAY_SIZE(sb->extended_failed_devices); | |
2070 | ||
2071 | sb->failed_devices = cpu_to_le64(failed_devices[0]); | |
2072 | while (i--) | |
2073 | sb->extended_failed_devices[i] = cpu_to_le64(failed_devices[i+1]); | |
2074 | } | |
2075 | ||
2076 | /* | |
2077 | * Synchronize the superblock members with the raid set properties | |
2078 | * | |
2079 | * All superblock data is little endian. | |
2080 | */ | |
fd01b88c | 2081 | static void super_sync(struct mddev *mddev, struct md_rdev *rdev) |
b12d437b | 2082 | { |
7b34df74 HM |
2083 | bool update_failed_devices = false; |
2084 | unsigned int i; | |
2085 | uint64_t failed_devices[DISKS_ARRAY_ELEMS]; | |
b12d437b | 2086 | struct dm_raid_superblock *sb; |
81f382f9 | 2087 | struct raid_set *rs = container_of(mddev, struct raid_set, md); |
b12d437b | 2088 | |
7b34df74 HM |
2089 | /* No metadata device, no superblock */ |
2090 | if (!rdev->meta_bdev) | |
2091 | return; | |
2092 | ||
2093 | BUG_ON(!rdev->sb_page); | |
2094 | ||
b12d437b | 2095 | sb = page_address(rdev->sb_page); |
b12d437b | 2096 | |
7b34df74 | 2097 | sb_retrieve_failed_devices(sb, failed_devices); |
b12d437b | 2098 | |
7b34df74 HM |
2099 | for (i = 0; i < rs->raid_disks; i++) |
2100 | if (!rs->dev[i].data_dev || test_bit(Faulty, &rs->dev[i].rdev.flags)) { | |
2101 | update_failed_devices = true; | |
2102 | set_bit(i, (void *) failed_devices); | |
2103 | } | |
2104 | ||
2105 | if (update_failed_devices) | |
2106 | sb_update_failed_devices(sb, failed_devices); | |
b12d437b JB |
2107 | |
2108 | sb->magic = cpu_to_le32(DM_RAID_MAGIC); | |
9b6e5423 | 2109 | sb->compat_features = cpu_to_le32(FEATURE_FLAG_SUPPORTS_V190); |
b12d437b JB |
2110 | |
2111 | sb->num_devices = cpu_to_le32(mddev->raid_disks); | |
2112 | sb->array_position = cpu_to_le32(rdev->raid_disk); | |
2113 | ||
2114 | sb->events = cpu_to_le64(mddev->events); | |
b12d437b JB |
2115 | |
2116 | sb->disk_recovery_offset = cpu_to_le64(rdev->recovery_offset); | |
2117 | sb->array_resync_offset = cpu_to_le64(mddev->recovery_cp); | |
2118 | ||
2119 | sb->level = cpu_to_le32(mddev->level); | |
2120 | sb->layout = cpu_to_le32(mddev->layout); | |
2121 | sb->stripe_sectors = cpu_to_le32(mddev->chunk_sectors); | |
7b34df74 | 2122 | |
c4d097d1 HM |
2123 | /******************************************************************** |
2124 | * BELOW FOLLOW V1.9.0 EXTENSIONS TO THE PRISTINE SUPERBLOCK FORMAT!!! | |
2125 | * | |
2126 | * FEATURE_FLAG_SUPPORTS_V190 in the compat_features member indicates that those exist | |
2127 | */ | |
7b34df74 HM |
2128 | sb->new_level = cpu_to_le32(mddev->new_level); |
2129 | sb->new_layout = cpu_to_le32(mddev->new_layout); | |
2130 | sb->new_stripe_sectors = cpu_to_le32(mddev->new_chunk_sectors); | |
2131 | ||
2132 | sb->delta_disks = cpu_to_le32(mddev->delta_disks); | |
2133 | ||
2134 | smp_rmb(); /* Make sure we access most recent reshape position */ | |
2135 | sb->reshape_position = cpu_to_le64(mddev->reshape_position); | |
2136 | if (le64_to_cpu(sb->reshape_position) != MaxSector) { | |
2137 | /* Flag ongoing reshape */ | |
2138 | sb->flags |= cpu_to_le32(SB_FLAG_RESHAPE_ACTIVE); | |
2139 | ||
2140 | if (mddev->delta_disks < 0 || mddev->reshape_backwards) | |
2141 | sb->flags |= cpu_to_le32(SB_FLAG_RESHAPE_BACKWARDS); | |
4286325b MS |
2142 | } else { |
2143 | /* Clear reshape flags */ | |
2144 | sb->flags &= ~(cpu_to_le32(SB_FLAG_RESHAPE_ACTIVE|SB_FLAG_RESHAPE_BACKWARDS)); | |
2145 | } | |
7b34df74 HM |
2146 | |
2147 | sb->array_sectors = cpu_to_le64(mddev->array_sectors); | |
2148 | sb->data_offset = cpu_to_le64(rdev->data_offset); | |
2149 | sb->new_data_offset = cpu_to_le64(rdev->new_data_offset); | |
2150 | sb->sectors = cpu_to_le64(rdev->sectors); | |
b2a4872a | 2151 | sb->incompat_features = cpu_to_le32(0); |
7b34df74 HM |
2152 | |
2153 | /* Zero out the rest of the payload after the size of the superblock */ | |
2154 | memset(sb + 1, 0, rdev->sb_size - sizeof(*sb)); | |
b12d437b JB |
2155 | } |
2156 | ||
2157 | /* | |
2158 | * super_load | |
2159 | * | |
2160 | * This function creates a superblock if one is not found on the device | |
2161 | * and will decide which superblock to use if there's a choice. | |
2162 | * | |
2163 | * Return: 1 if use rdev, 0 if use refdev, -Exxx otherwise | |
2164 | */ | |
3cb03002 | 2165 | static int super_load(struct md_rdev *rdev, struct md_rdev *refdev) |
b12d437b | 2166 | { |
73c6f239 | 2167 | int r; |
b12d437b JB |
2168 | struct dm_raid_superblock *sb; |
2169 | struct dm_raid_superblock *refsb; | |
2170 | uint64_t events_sb, events_refsb; | |
2171 | ||
e2568465 | 2172 | r = read_disk_sb(rdev, rdev->sb_size, false); |
73c6f239 HM |
2173 | if (r) |
2174 | return r; | |
b12d437b JB |
2175 | |
2176 | sb = page_address(rdev->sb_page); | |
3aa3b2b2 JB |
2177 | |
2178 | /* | |
2179 | * Two cases that we want to write new superblocks and rebuild: | |
2180 | * 1) New device (no matching magic number) | |
2181 | * 2) Device specified for rebuild (!In_sync w/ offset == 0) | |
2182 | */ | |
2183 | if ((sb->magic != cpu_to_le32(DM_RAID_MAGIC)) || | |
2184 | (!test_bit(In_sync, &rdev->flags) && !rdev->recovery_offset)) { | |
b12d437b JB |
2185 | super_sync(rdev->mddev, rdev); |
2186 | ||
2187 | set_bit(FirstUse, &rdev->flags); | |
9b6e5423 | 2188 | sb->compat_features = cpu_to_le32(FEATURE_FLAG_SUPPORTS_V190); |
b12d437b JB |
2189 | |
2190 | /* Force writing of superblocks to disk */ | |
2953079c | 2191 | set_bit(MD_SB_CHANGE_DEVS, &rdev->mddev->sb_flags); |
b12d437b JB |
2192 | |
2193 | /* Any superblock is better than none, choose that if given */ | |
2194 | return refdev ? 0 : 1; | |
2195 | } | |
2196 | ||
2197 | if (!refdev) | |
2198 | return 1; | |
2199 | ||
2200 | events_sb = le64_to_cpu(sb->events); | |
2201 | ||
2202 | refsb = page_address(refdev->sb_page); | |
2203 | events_refsb = le64_to_cpu(refsb->events); | |
2204 | ||
2205 | return (events_sb > events_refsb) ? 1 : 0; | |
2206 | } | |
2207 | ||
33e53f06 | 2208 | static int super_init_validation(struct raid_set *rs, struct md_rdev *rdev) |
b12d437b JB |
2209 | { |
2210 | int role; | |
33e53f06 HM |
2211 | unsigned int d; |
2212 | struct mddev *mddev = &rs->md; | |
b12d437b | 2213 | uint64_t events_sb; |
33e53f06 | 2214 | uint64_t failed_devices[DISKS_ARRAY_ELEMS]; |
b12d437b | 2215 | struct dm_raid_superblock *sb; |
33e53f06 | 2216 | uint32_t new_devs = 0, rebuild_and_new = 0, rebuilds = 0; |
dafb20fa | 2217 | struct md_rdev *r; |
b12d437b JB |
2218 | struct dm_raid_superblock *sb2; |
2219 | ||
2220 | sb = page_address(rdev->sb_page); | |
2221 | events_sb = le64_to_cpu(sb->events); | |
b12d437b JB |
2222 | |
2223 | /* | |
2224 | * Initialise to 1 if this is a new superblock. | |
2225 | */ | |
2226 | mddev->events = events_sb ? : 1; | |
2227 | ||
33e53f06 HM |
2228 | mddev->reshape_position = MaxSector; |
2229 | ||
453c2a89 HM |
2230 | mddev->raid_disks = le32_to_cpu(sb->num_devices); |
2231 | mddev->level = le32_to_cpu(sb->level); | |
2232 | mddev->layout = le32_to_cpu(sb->layout); | |
2233 | mddev->chunk_sectors = le32_to_cpu(sb->stripe_sectors); | |
2234 | ||
b12d437b | 2235 | /* |
33e53f06 HM |
2236 | * Reshaping is supported, e.g. reshape_position is valid |
2237 | * in superblock and superblock content is authoritative. | |
b12d437b | 2238 | */ |
4286325b | 2239 | if (le32_to_cpu(sb->compat_features) & FEATURE_FLAG_SUPPORTS_V190) { |
33e53f06 | 2240 | /* Superblock is authoritative wrt given raid set layout! */ |
33e53f06 HM |
2241 | mddev->new_level = le32_to_cpu(sb->new_level); |
2242 | mddev->new_layout = le32_to_cpu(sb->new_layout); | |
2243 | mddev->new_chunk_sectors = le32_to_cpu(sb->new_stripe_sectors); | |
2244 | mddev->delta_disks = le32_to_cpu(sb->delta_disks); | |
2245 | mddev->array_sectors = le64_to_cpu(sb->array_sectors); | |
2246 | ||
2247 | /* raid was reshaping and got interrupted */ | |
4286325b MS |
2248 | if (le32_to_cpu(sb->flags) & SB_FLAG_RESHAPE_ACTIVE) { |
2249 | if (test_bit(__CTR_FLAG_DELTA_DISKS, &rs->ctr_flags)) { | |
33e53f06 HM |
2250 | DMERR("Reshape requested but raid set is still reshaping"); |
2251 | return -EINVAL; | |
2252 | } | |
b12d437b | 2253 | |
33e53f06 | 2254 | if (mddev->delta_disks < 0 || |
4286325b | 2255 | (!mddev->delta_disks && (le32_to_cpu(sb->flags) & SB_FLAG_RESHAPE_BACKWARDS))) |
33e53f06 HM |
2256 | mddev->reshape_backwards = 1; |
2257 | else | |
2258 | mddev->reshape_backwards = 0; | |
2259 | ||
2260 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); | |
2261 | rs->raid_type = get_raid_type_by_ll(mddev->level, mddev->layout); | |
2262 | } | |
2263 | ||
2264 | } else { | |
2265 | /* | |
9b6e5423 | 2266 | * No takeover/reshaping, because we don't have the extended v1.9.0 metadata |
33e53f06 | 2267 | */ |
453c2a89 HM |
2268 | struct raid_type *rt_cur = get_raid_type_by_ll(mddev->level, mddev->layout); |
2269 | struct raid_type *rt_new = get_raid_type_by_ll(mddev->new_level, mddev->new_layout); | |
33e53f06 | 2270 | |
453c2a89 HM |
2271 | if (rs_takeover_requested(rs)) { |
2272 | if (rt_cur && rt_new) | |
2273 | DMERR("Takeover raid sets from %s to %s not yet supported by metadata. (raid level change)", | |
2274 | rt_cur->name, rt_new->name); | |
2275 | else | |
2276 | DMERR("Takeover raid sets not yet supported by metadata. (raid level change)"); | |
2277 | return -EINVAL; | |
2278 | } else if (rs_reshape_requested(rs)) { | |
2279 | DMERR("Reshaping raid sets not yet supported by metadata. (raid layout change keeping level)"); | |
2280 | if (mddev->layout != mddev->new_layout) { | |
2281 | if (rt_cur && rt_new) | |
2282 | DMERR(" current layout %s vs new layout %s", | |
2283 | rt_cur->name, rt_new->name); | |
2284 | else | |
2285 | DMERR(" current layout 0x%X vs new layout 0x%X", | |
2286 | le32_to_cpu(sb->layout), mddev->new_layout); | |
2287 | } | |
2288 | if (mddev->chunk_sectors != mddev->new_chunk_sectors) | |
2289 | DMERR(" current stripe sectors %u vs new stripe sectors %u", | |
2290 | mddev->chunk_sectors, mddev->new_chunk_sectors); | |
2291 | if (rs->delta_disks) | |
2292 | DMERR(" current %u disks vs new %u disks", | |
2293 | mddev->raid_disks, mddev->raid_disks + rs->delta_disks); | |
2294 | if (rs_is_raid10(rs)) { | |
2295 | DMERR(" Old layout: %s w/ %u copies", | |
2296 | raid10_md_layout_to_format(mddev->layout), | |
2297 | raid10_md_layout_to_copies(mddev->layout)); | |
2298 | DMERR(" New layout: %s w/ %u copies", | |
2299 | raid10_md_layout_to_format(mddev->new_layout), | |
2300 | raid10_md_layout_to_copies(mddev->new_layout)); | |
2301 | } | |
33e53f06 HM |
2302 | return -EINVAL; |
2303 | } | |
2304 | ||
b052b07c | 2305 | DMINFO("Discovered old metadata format; upgrading to extended metadata format"); |
b12d437b JB |
2306 | } |
2307 | ||
4286325b | 2308 | if (!test_bit(__CTR_FLAG_NOSYNC, &rs->ctr_flags)) |
b12d437b JB |
2309 | mddev->recovery_cp = le64_to_cpu(sb->array_resync_offset); |
2310 | ||
2311 | /* | |
2312 | * During load, we set FirstUse if a new superblock was written. | |
2313 | * There are two reasons we might not have a superblock: | |
33e53f06 | 2314 | * 1) The raid set is brand new - in which case, all of the |
43157840 | 2315 | * devices must have their In_sync bit set. Also, |
b12d437b | 2316 | * recovery_cp must be 0, unless forced. |
33e53f06 | 2317 | * 2) This is a new device being added to an old raid set |
b12d437b JB |
2318 | * and the new device needs to be rebuilt - in which |
2319 | * case the In_sync bit will /not/ be set and | |
2320 | * recovery_cp must be MaxSector. | |
9dbd1aa3 HM |
2321 | * 3) This is/are a new device(s) being added to an old |
2322 | * raid set during takeover to a higher raid level | |
2323 | * to provide capacity for redundancy or during reshape | |
2324 | * to add capacity to grow the raid set. | |
b12d437b | 2325 | */ |
33e53f06 | 2326 | d = 0; |
dafb20fa | 2327 | rdev_for_each(r, mddev) { |
63c32ed4 HM |
2328 | if (test_bit(Journal, &rdev->flags)) |
2329 | continue; | |
2330 | ||
33e53f06 HM |
2331 | if (test_bit(FirstUse, &r->flags)) |
2332 | new_devs++; | |
2333 | ||
b12d437b | 2334 | if (!test_bit(In_sync, &r->flags)) { |
33e53f06 HM |
2335 | DMINFO("Device %d specified for rebuild; clearing superblock", |
2336 | r->raid_disk); | |
b12d437b | 2337 | rebuilds++; |
33e53f06 HM |
2338 | |
2339 | if (test_bit(FirstUse, &r->flags)) | |
2340 | rebuild_and_new++; | |
2341 | } | |
2342 | ||
2343 | d++; | |
b12d437b JB |
2344 | } |
2345 | ||
33e53f06 HM |
2346 | if (new_devs == rs->raid_disks || !rebuilds) { |
2347 | /* Replace a broken device */ | |
2348 | if (new_devs == 1 && !rs->delta_disks) | |
2349 | ; | |
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 HM |
2533 | * With reshaping capability added, we must ensure that |
2534 | * that 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 | |
2595 | * for out of place reshaping if requested by contructor | |
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 && | |
052b2b1e | 2669 | to_sector(i_size_read(rdev->bdev->bd_inode)) - 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 HM |
2830 | /* |
2831 | * | |
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 HM |
2859 | * to grow after the disk adding reshape, |
2860 | * which'll hapen in the event handler; | |
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 | ||
75b8e04b | 2940 | /* |
48cf06bc HM |
2941 | * Enable/disable discard support on RAID set depending on |
2942 | * RAID level and discard properties of underlying RAID members. | |
75b8e04b | 2943 | */ |
ecbfb9f1 | 2944 | static void configure_discard_support(struct raid_set *rs) |
75b8e04b | 2945 | { |
48cf06bc HM |
2946 | int i; |
2947 | bool raid456; | |
ecbfb9f1 | 2948 | struct dm_target *ti = rs->ti; |
48cf06bc | 2949 | |
48920ff2 CH |
2950 | /* |
2951 | * XXX: RAID level 4,5,6 require zeroing for safety. | |
2952 | */ | |
552aa679 | 2953 | raid456 = rs_is_raid456(rs); |
75b8e04b | 2954 | |
ffeeac75 | 2955 | for (i = 0; i < rs->raid_disks; i++) { |
d20c4b08 | 2956 | struct request_queue *q; |
48cf06bc | 2957 | |
d20c4b08 HM |
2958 | if (!rs->dev[i].rdev.bdev) |
2959 | continue; | |
2960 | ||
2961 | q = bdev_get_queue(rs->dev[i].rdev.bdev); | |
48cf06bc HM |
2962 | if (!q || !blk_queue_discard(q)) |
2963 | return; | |
2964 | ||
2965 | if (raid456) { | |
48cf06bc HM |
2966 | if (!devices_handle_discard_safely) { |
2967 | DMERR("raid456 discard support disabled due to discard_zeroes_data uncertainty."); | |
2968 | DMERR("Set dm-raid.devices_handle_discard_safely=Y to override."); | |
2969 | return; | |
2970 | } | |
2971 | } | |
2972 | } | |
2973 | ||
75b8e04b HM |
2974 | ti->num_discard_bios = 1; |
2975 | } | |
2976 | ||
9d09e663 | 2977 | /* |
73c6f239 | 2978 | * Construct a RAID0/1/10/4/5/6 mapping: |
9d09e663 | 2979 | * Args: |
43157840 MS |
2980 | * <raid_type> <#raid_params> <raid_params>{0,} \ |
2981 | * <#raid_devs> [<meta_dev1> <dev1>]{1,} | |
9d09e663 | 2982 | * |
43157840 | 2983 | * <raid_params> varies by <raid_type>. See 'parse_raid_params' for |
9d09e663 | 2984 | * details on possible <raid_params>. |
73c6f239 HM |
2985 | * |
2986 | * Userspace is free to initialize the metadata devices, hence the superblocks to | |
2987 | * enforce recreation based on the passed in table parameters. | |
2988 | * | |
9d09e663 | 2989 | */ |
094f394d | 2990 | static int raid_ctr(struct dm_target *ti, unsigned int argc, char **argv) |
9d09e663 | 2991 | { |
73c6f239 | 2992 | int r; |
7501537e | 2993 | bool resize = false; |
9d09e663 | 2994 | struct raid_type *rt; |
094f394d | 2995 | unsigned int num_raid_params, num_raid_devs; |
99273d9e | 2996 | sector_t sb_array_sectors, rdev_sectors, reshape_sectors; |
9d09e663 | 2997 | struct raid_set *rs = NULL; |
92c83d79 | 2998 | const char *arg; |
9dbd1aa3 | 2999 | struct rs_layout rs_layout; |
92c83d79 HM |
3000 | struct dm_arg_set as = { argc, argv }, as_nrd; |
3001 | struct dm_arg _args[] = { | |
3002 | { 0, as.argc, "Cannot understand number of raid parameters" }, | |
3003 | { 1, 254, "Cannot understand number of raid devices parameters" } | |
3004 | }; | |
3005 | ||
92c83d79 | 3006 | arg = dm_shift_arg(&as); |
bd83a4c4 MS |
3007 | if (!arg) { |
3008 | ti->error = "No arguments"; | |
3009 | return -EINVAL; | |
3010 | } | |
9d09e663 | 3011 | |
92c83d79 | 3012 | rt = get_raid_type(arg); |
bd83a4c4 MS |
3013 | if (!rt) { |
3014 | ti->error = "Unrecognised raid_type"; | |
3015 | return -EINVAL; | |
3016 | } | |
9d09e663 | 3017 | |
92c83d79 HM |
3018 | /* Must have <#raid_params> */ |
3019 | if (dm_read_arg_group(_args, &as, &num_raid_params, &ti->error)) | |
43157840 | 3020 | return -EINVAL; |
9d09e663 | 3021 | |
92c83d79 HM |
3022 | /* number of raid device tupples <meta_dev data_dev> */ |
3023 | as_nrd = as; | |
3024 | dm_consume_args(&as_nrd, num_raid_params); | |
3025 | _args[1].max = (as_nrd.argc - 1) / 2; | |
3026 | if (dm_read_arg(_args + 1, &as_nrd, &num_raid_devs, &ti->error)) | |
43157840 | 3027 | return -EINVAL; |
9d09e663 | 3028 | |
bb91a63f | 3029 | if (!__within_range(num_raid_devs, 1, MAX_RAID_DEVICES)) { |
bd83a4c4 MS |
3030 | ti->error = "Invalid number of supplied raid devices"; |
3031 | return -EINVAL; | |
3032 | } | |
3ca5a21a | 3033 | |
bfcee0e3 | 3034 | rs = raid_set_alloc(ti, rt, num_raid_devs); |
9d09e663 N |
3035 | if (IS_ERR(rs)) |
3036 | return PTR_ERR(rs); | |
3037 | ||
92c83d79 | 3038 | r = parse_raid_params(rs, &as, num_raid_params); |
73c6f239 | 3039 | if (r) |
9d09e663 N |
3040 | goto bad; |
3041 | ||
702108d1 | 3042 | r = parse_dev_params(rs, &as); |
73c6f239 | 3043 | if (r) |
9d09e663 N |
3044 | goto bad; |
3045 | ||
b12d437b | 3046 | rs->md.sync_super = super_sync; |
ecbfb9f1 | 3047 | |
2527b56e HM |
3048 | /* |
3049 | * Calculate ctr requested array and device sizes to allow | |
3050 | * for superblock analysis needing device sizes defined. | |
3051 | * | |
3052 | * Any existing superblock will overwrite the array and device sizes | |
3053 | */ | |
22c992e1 | 3054 | r = rs_set_dev_and_array_sectors(rs, rs->ti->len, false); |
40ba37e5 | 3055 | if (r) |
b1956dc4 | 3056 | goto bad; |
40ba37e5 | 3057 | |
99273d9e HM |
3058 | /* Memorize just calculated, potentially larger sizes to grow the raid set in preresume */ |
3059 | rs->array_sectors = rs->md.array_sectors; | |
3060 | rs->dev_sectors = rs->md.dev_sectors; | |
4dff2f1e | 3061 | |
ecbfb9f1 HM |
3062 | /* |
3063 | * Backup any new raid set level, layout, ... | |
3064 | * requested to be able to compare to superblock | |
3065 | * members for conversion decisions. | |
3066 | */ | |
9dbd1aa3 | 3067 | rs_config_backup(rs, &rs_layout); |
ecbfb9f1 | 3068 | |
73c6f239 HM |
3069 | r = analyse_superblocks(ti, rs); |
3070 | if (r) | |
b12d437b JB |
3071 | goto bad; |
3072 | ||
99273d9e HM |
3073 | /* All in-core metadata now as of current superblocks after calling analyse_superblocks() */ |
3074 | sb_array_sectors = rs->md.array_sectors; | |
4d49f1b4 HM |
3075 | rdev_sectors = __rdev_sectors(rs); |
3076 | if (!rdev_sectors) { | |
3077 | ti->error = "Invalid rdev size"; | |
3078 | r = -EINVAL; | |
3079 | goto bad; | |
3080 | } | |
3081 | ||
7501537e HM |
3082 | |
3083 | reshape_sectors = _get_reshape_sectors(rs); | |
99273d9e HM |
3084 | if (rs->dev_sectors != rdev_sectors) { |
3085 | resize = (rs->dev_sectors != rdev_sectors - reshape_sectors); | |
3086 | if (rs->dev_sectors > rdev_sectors - reshape_sectors) | |
3087 | set_bit(RT_FLAG_RS_GROW, &rs->runtime_flags); | |
3088 | } | |
4dff2f1e | 3089 | |
9d09e663 | 3090 | INIT_WORK(&rs->md.event_work, do_table_event); |
9d09e663 | 3091 | ti->private = rs; |
55a62eef | 3092 | ti->num_flush_bios = 1; |
9d09e663 | 3093 | |
ecbfb9f1 | 3094 | /* Restore any requested new layout for conversion decision */ |
9dbd1aa3 | 3095 | rs_config_restore(rs, &rs_layout); |
ecbfb9f1 | 3096 | |
469b304b HM |
3097 | /* |
3098 | * Now that we have any superblock metadata available, | |
3099 | * check for new, recovering, reshaping, to be taken over, | |
3100 | * to be reshaped or an existing, unchanged raid set to | |
3101 | * run in sequence. | |
3102 | */ | |
9dbd1aa3 | 3103 | if (test_bit(MD_ARRAY_FIRST_USE, &rs->md.flags)) { |
2d92a3c2 HM |
3104 | /* A new raid6 set has to be recovered to ensure proper parity and Q-Syndrome */ |
3105 | if (rs_is_raid6(rs) && | |
3106 | test_bit(__CTR_FLAG_NOSYNC, &rs->ctr_flags)) { | |
3107 | ti->error = "'nosync' not allowed for new raid6 set"; | |
b1956dc4 HM |
3108 | r = -EINVAL; |
3109 | goto bad; | |
2d92a3c2 HM |
3110 | } |
3111 | rs_setup_recovery(rs, 0); | |
2a5556c2 HM |
3112 | set_bit(RT_FLAG_UPDATE_SBS, &rs->runtime_flags); |
3113 | rs_set_new(rs); | |
3114 | } else if (rs_is_recovering(rs)) { | |
469b304b | 3115 | /* A recovering raid set may be resized */ |
99273d9e | 3116 | goto size_check; |
2a5556c2 HM |
3117 | } else if (rs_is_reshaping(rs)) { |
3118 | /* Have to reject size change request during reshape */ | |
3119 | if (resize) { | |
3120 | ti->error = "Can't resize a reshaping raid set"; | |
b1956dc4 HM |
3121 | r = -EPERM; |
3122 | goto bad; | |
2d92a3c2 | 3123 | } |
469b304b | 3124 | /* skip setup rs */ |
2d92a3c2 | 3125 | } else if (rs_takeover_requested(rs)) { |
9dbd1aa3 HM |
3126 | if (rs_is_reshaping(rs)) { |
3127 | ti->error = "Can't takeover a reshaping raid set"; | |
b1956dc4 HM |
3128 | r = -EPERM; |
3129 | goto bad; | |
9dbd1aa3 HM |
3130 | } |
3131 | ||
63c32ed4 HM |
3132 | /* We can't takeover a journaled raid4/5/6 */ |
3133 | if (test_bit(__CTR_FLAG_JOURNAL_DEV, &rs->ctr_flags)) { | |
3134 | ti->error = "Can't takeover a journaled raid4/5/6 set"; | |
3135 | r = -EPERM; | |
3136 | goto bad; | |
3137 | } | |
3138 | ||
9dbd1aa3 | 3139 | /* |
2527b56e | 3140 | * If a takeover is needed, userspace sets any additional |
469b304b HM |
3141 | * devices to rebuild and we can check for a valid request here. |
3142 | * | |
3143 | * If acceptible, set the level to the new requested | |
2a5556c2 HM |
3144 | * one, prohibit requesting recovery, allow the raid |
3145 | * set to run and store superblocks during resume. | |
9dbd1aa3 | 3146 | */ |
ecbfb9f1 HM |
3147 | r = rs_check_takeover(rs); |
3148 | if (r) | |
b1956dc4 | 3149 | goto bad; |
ecbfb9f1 HM |
3150 | |
3151 | r = rs_setup_takeover(rs); | |
3152 | if (r) | |
b1956dc4 | 3153 | goto bad; |
ecbfb9f1 | 3154 | |
4286325b | 3155 | set_bit(RT_FLAG_UPDATE_SBS, &rs->runtime_flags); |
469b304b | 3156 | /* Takeover ain't recovery, so disable recovery */ |
2a5556c2 | 3157 | rs_setup_recovery(rs, MaxSector); |
3a1c1ef2 | 3158 | rs_set_new(rs); |
40ba37e5 | 3159 | } else if (rs_reshape_requested(rs)) { |
f9f3ee91 | 3160 | /* Only request grow on raid set size extensions, not on reshapes. */ |
99273d9e HM |
3161 | clear_bit(RT_FLAG_RS_GROW, &rs->runtime_flags); |
3162 | ||
63c32ed4 HM |
3163 | /* |
3164 | * No need to check for 'ongoing' takeover here, because takeover | |
3165 | * is an instant operation as oposed to an ongoing reshape. | |
3166 | */ | |
3167 | ||
3168 | /* We can't reshape a journaled raid4/5/6 */ | |
3169 | if (test_bit(__CTR_FLAG_JOURNAL_DEV, &rs->ctr_flags)) { | |
3170 | ti->error = "Can't reshape a journaled raid4/5/6 set"; | |
3171 | r = -EPERM; | |
3172 | goto bad; | |
3173 | } | |
3174 | ||
11e47232 HM |
3175 | /* Out-of-place space has to be available to allow for a reshape unless raid1! */ |
3176 | if (reshape_sectors || rs_is_raid1(rs)) { | |
3177 | /* | |
3178 | * We can only prepare for a reshape here, because the | |
3179 | * raid set needs to run to provide the repective reshape | |
3180 | * check functions via its MD personality instance. | |
3181 | * | |
3182 | * So do the reshape check after md_run() succeeded. | |
3183 | */ | |
3184 | r = rs_prepare_reshape(rs); | |
3185 | if (r) | |
dc1a3e8e | 3186 | goto bad; |
9dbd1aa3 | 3187 | |
11e47232 HM |
3188 | /* Reshaping ain't recovery, so disable recovery */ |
3189 | rs_setup_recovery(rs, MaxSector); | |
3190 | } | |
3a1c1ef2 | 3191 | rs_set_cur(rs); |
2a5556c2 | 3192 | } else { |
99273d9e | 3193 | size_check: |
2a5556c2 | 3194 | /* May not set recovery when a device rebuild is requested */ |
37f10be1 | 3195 | if (test_bit(__CTR_FLAG_REBUILD, &rs->ctr_flags)) { |
99273d9e | 3196 | clear_bit(RT_FLAG_RS_GROW, &rs->runtime_flags); |
37f10be1 | 3197 | set_bit(RT_FLAG_UPDATE_SBS, &rs->runtime_flags); |
f9f3ee91 | 3198 | rs_setup_recovery(rs, MaxSector); |
99273d9e HM |
3199 | } else if (test_bit(RT_FLAG_RS_GROW, &rs->runtime_flags)) { |
3200 | /* | |
f9f3ee91 HM |
3201 | * Set raid set to current size, i.e. size as of |
3202 | * superblocks to grow to larger size in preresume. | |
99273d9e HM |
3203 | */ |
3204 | r = rs_set_dev_and_array_sectors(rs, sb_array_sectors, false); | |
3205 | if (r) | |
3206 | goto bad; | |
3207 | ||
3208 | rs_setup_recovery(rs, rs->md.recovery_cp < rs->md.dev_sectors ? rs->md.recovery_cp : rs->md.dev_sectors); | |
3209 | } else { | |
3210 | /* This is no size change or it is shrinking, update size and record in superblocks */ | |
3211 | r = rs_set_dev_and_array_sectors(rs, rs->ti->len, false); | |
3212 | if (r) | |
3213 | goto bad; | |
3214 | ||
3215 | if (sb_array_sectors > rs->array_sectors) | |
3216 | set_bit(RT_FLAG_UPDATE_SBS, &rs->runtime_flags); | |
3217 | } | |
2a5556c2 | 3218 | rs_set_cur(rs); |
4dff2f1e | 3219 | } |
ecbfb9f1 | 3220 | |
40ba37e5 HM |
3221 | /* If constructor requested it, change data and new_data offsets */ |
3222 | r = rs_adjust_data_offsets(rs); | |
3223 | if (r) | |
b1956dc4 | 3224 | goto bad; |
40ba37e5 | 3225 | |
ecbfb9f1 HM |
3226 | /* Start raid set read-only and assumed clean to change in raid_resume() */ |
3227 | rs->md.ro = 1; | |
3228 | rs->md.in_sync = 1; | |
5380c05b HM |
3229 | |
3230 | /* Keep array frozen */ | |
ecbfb9f1 | 3231 | set_bit(MD_RECOVERY_FROZEN, &rs->md.recovery); |
75b8e04b | 3232 | |
0cf45031 HM |
3233 | /* Has to be held on running the array */ |
3234 | mddev_lock_nointr(&rs->md); | |
73c6f239 | 3235 | r = md_run(&rs->md); |
9d09e663 | 3236 | rs->md.in_sync = 0; /* Assume already marked dirty */ |
73c6f239 | 3237 | if (r) { |
9dbd1aa3 HM |
3238 | ti->error = "Failed to run raid array"; |
3239 | mddev_unlock(&rs->md); | |
9d09e663 N |
3240 | goto bad; |
3241 | } | |
3242 | ||
d5d885fd SL |
3243 | r = md_start(&rs->md); |
3244 | ||
3245 | if (r) { | |
3246 | ti->error = "Failed to start raid array"; | |
3247 | mddev_unlock(&rs->md); | |
3248 | goto bad_md_start; | |
3249 | } | |
3250 | ||
9d09e663 | 3251 | rs->callbacks.congested_fn = raid_is_congested; |
9d09e663 N |
3252 | dm_table_add_target_callbacks(ti->table, &rs->callbacks); |
3253 | ||
5380c05b | 3254 | /* If raid4/5/6 journal mode explicitly requested (only possible with journal dev) -> set it */ |
6e53636f HM |
3255 | if (test_bit(__CTR_FLAG_JOURNAL_MODE, &rs->ctr_flags)) { |
3256 | r = r5c_journal_mode_set(&rs->md, rs->journal_dev.mode); | |
3257 | if (r) { | |
3258 | ti->error = "Failed to set raid4/5/6 journal mode"; | |
3259 | mddev_unlock(&rs->md); | |
3260 | goto bad_journal_mode_set; | |
3261 | } | |
3262 | } | |
3263 | ||
32737279 | 3264 | mddev_suspend(&rs->md); |
0cf352e5 | 3265 | set_bit(RT_FLAG_RS_SUSPENDED, &rs->runtime_flags); |
9dbd1aa3 HM |
3266 | |
3267 | /* Try to adjust the raid4/5/6 stripe cache size to the stripe size */ | |
3268 | if (rs_is_raid456(rs)) { | |
3269 | r = rs_set_raid456_stripe_cache(rs); | |
3270 | if (r) | |
3271 | goto bad_stripe_cache; | |
3272 | } | |
3273 | ||
3274 | /* Now do an early reshape check */ | |
3275 | if (test_bit(RT_FLAG_RESHAPE_RS, &rs->runtime_flags)) { | |
3276 | r = rs_check_reshape(rs); | |
3277 | if (r) | |
b1956dc4 | 3278 | goto bad_check_reshape; |
9dbd1aa3 HM |
3279 | |
3280 | /* Restore new, ctr requested layout to perform check */ | |
3281 | rs_config_restore(rs, &rs_layout); | |
3282 | ||
7a7c330f HM |
3283 | if (rs->md.pers->start_reshape) { |
3284 | r = rs->md.pers->check_reshape(&rs->md); | |
3285 | if (r) { | |
3286 | ti->error = "Reshape check failed"; | |
3287 | goto bad_check_reshape; | |
3288 | } | |
9dbd1aa3 HM |
3289 | } |
3290 | } | |
3291 | ||
11e29684 HM |
3292 | /* Disable/enable discard support on raid set. */ |
3293 | configure_discard_support(rs); | |
3294 | ||
9dbd1aa3 | 3295 | mddev_unlock(&rs->md); |
9d09e663 N |
3296 | return 0; |
3297 | ||
d5d885fd | 3298 | bad_md_start: |
6e53636f | 3299 | bad_journal_mode_set: |
9dbd1aa3 HM |
3300 | bad_stripe_cache: |
3301 | bad_check_reshape: | |
63f33b8d | 3302 | md_stop(&rs->md); |
9d09e663 | 3303 | bad: |
bfcee0e3 | 3304 | raid_set_free(rs); |
9d09e663 | 3305 | |
73c6f239 | 3306 | return r; |
9d09e663 N |
3307 | } |
3308 | ||
3309 | static void raid_dtr(struct dm_target *ti) | |
3310 | { | |
3311 | struct raid_set *rs = ti->private; | |
3312 | ||
3313 | list_del_init(&rs->callbacks.list); | |
3314 | md_stop(&rs->md); | |
bfcee0e3 | 3315 | raid_set_free(rs); |
9d09e663 N |
3316 | } |
3317 | ||
7de3ee57 | 3318 | static int raid_map(struct dm_target *ti, struct bio *bio) |
9d09e663 N |
3319 | { |
3320 | struct raid_set *rs = ti->private; | |
fd01b88c | 3321 | struct mddev *mddev = &rs->md; |
9d09e663 | 3322 | |
9dbd1aa3 HM |
3323 | /* |
3324 | * If we're reshaping to add disk(s)), ti->len and | |
3325 | * mddev->array_sectors will differ during the process | |
3326 | * (ti->len > mddev->array_sectors), so we have to requeue | |
3327 | * bios with addresses > mddev->array_sectors here or | |
2527b56e | 3328 | * there will occur accesses past EOD of the component |
9dbd1aa3 HM |
3329 | * data images thus erroring the raid set. |
3330 | */ | |
3331 | if (unlikely(bio_end_sector(bio) > mddev->array_sectors)) | |
3332 | return DM_MAPIO_REQUEUE; | |
3333 | ||
c4d6a1b8 | 3334 | md_handle_request(mddev, bio); |
9d09e663 N |
3335 | |
3336 | return DM_MAPIO_SUBMITTED; | |
3337 | } | |
3338 | ||
36a240a7 HM |
3339 | /* Return sync state string for @state */ |
3340 | enum sync_state { st_frozen, st_reshape, st_resync, st_check, st_repair, st_recover, st_idle }; | |
3341 | static const char *sync_str(enum sync_state state) | |
3342 | { | |
3343 | /* Has to be in above sync_state order! */ | |
3344 | static const char *sync_strs[] = { | |
3345 | "frozen", | |
3346 | "reshape", | |
3347 | "resync", | |
3348 | "check", | |
3349 | "repair", | |
3350 | "recover", | |
3351 | "idle" | |
3352 | }; | |
3353 | ||
3354 | return __within_range(state, 0, ARRAY_SIZE(sync_strs) - 1) ? sync_strs[state] : "undef"; | |
3355 | }; | |
3356 | ||
3357 | /* Return enum sync_state for @mddev derived from @recovery flags */ | |
0328ba90 | 3358 | static enum sync_state decipher_sync_action(struct mddev *mddev, unsigned long recovery) |
be83651f | 3359 | { |
67143510 | 3360 | if (test_bit(MD_RECOVERY_FROZEN, &recovery)) |
36a240a7 | 3361 | return st_frozen; |
be83651f | 3362 | |
36a240a7 | 3363 | /* The MD sync thread can be done with io or be interrupted but still be running */ |
4102d9de HM |
3364 | if (!test_bit(MD_RECOVERY_DONE, &recovery) && |
3365 | (test_bit(MD_RECOVERY_RUNNING, &recovery) || | |
3366 | (!mddev->ro && test_bit(MD_RECOVERY_NEEDED, &recovery)))) { | |
67143510 | 3367 | if (test_bit(MD_RECOVERY_RESHAPE, &recovery)) |
36a240a7 | 3368 | return st_reshape; |
be83651f | 3369 | |
67143510 HM |
3370 | if (test_bit(MD_RECOVERY_SYNC, &recovery)) { |
3371 | if (!test_bit(MD_RECOVERY_REQUESTED, &recovery)) | |
36a240a7 HM |
3372 | return st_resync; |
3373 | if (test_bit(MD_RECOVERY_CHECK, &recovery)) | |
3374 | return st_check; | |
3375 | return st_repair; | |
be83651f JB |
3376 | } |
3377 | ||
67143510 | 3378 | if (test_bit(MD_RECOVERY_RECOVER, &recovery)) |
36a240a7 HM |
3379 | return st_recover; |
3380 | ||
3381 | if (mddev->reshape_position != MaxSector) | |
3382 | return st_reshape; | |
be83651f JB |
3383 | } |
3384 | ||
36a240a7 | 3385 | return st_idle; |
be83651f JB |
3386 | } |
3387 | ||
3a1c1ef2 | 3388 | /* |
63c32ed4 | 3389 | * Return status string for @rdev |
3a1c1ef2 HM |
3390 | * |
3391 | * Status characters: | |
3392 | * | |
63c32ed4 | 3393 | * 'D' = Dead/Failed raid set component or raid4/5/6 journal device |
6e53636f HM |
3394 | * 'a' = Alive but not in-sync raid set component _or_ alive raid4/5/6 'write_back' journal device |
3395 | * 'A' = Alive and in-sync raid set component _or_ alive raid4/5/6 'write_through' journal device | |
c63ede3b | 3396 | * '-' = Non-existing device (i.e. uspace passed '- -' into the ctr) |
3a1c1ef2 | 3397 | */ |
242ea5ad | 3398 | static const char *__raid_dev_status(struct raid_set *rs, struct md_rdev *rdev) |
9d09e663 | 3399 | { |
c63ede3b HM |
3400 | if (!rdev->bdev) |
3401 | return "-"; | |
3402 | else if (test_bit(Faulty, &rdev->flags)) | |
3a1c1ef2 | 3403 | return "D"; |
63c32ed4 | 3404 | else if (test_bit(Journal, &rdev->flags)) |
6e53636f | 3405 | return (rs->journal_dev.mode == R5C_JOURNAL_MODE_WRITE_THROUGH) ? "A" : "a"; |
4102d9de HM |
3406 | else if (test_bit(RT_FLAG_RS_RESYNCING, &rs->runtime_flags) || |
3407 | (!test_bit(RT_FLAG_RS_IN_SYNC, &rs->runtime_flags) && | |
3408 | !test_bit(In_sync, &rdev->flags))) | |
3a1c1ef2 HM |
3409 | return "a"; |
3410 | else | |
3411 | return "A"; | |
3412 | } | |
9d09e663 | 3413 | |
242ea5ad | 3414 | /* Helper to return resync/reshape progress for @rs and runtime flags for raid set in sync / resynching */ |
67143510 | 3415 | static sector_t rs_get_progress(struct raid_set *rs, unsigned long recovery, |
53be73a5 | 3416 | enum sync_state state, sector_t resync_max_sectors) |
3a1c1ef2 | 3417 | { |
4102d9de | 3418 | sector_t r; |
3a1c1ef2 | 3419 | struct mddev *mddev = &rs->md; |
9d09e663 | 3420 | |
242ea5ad | 3421 | clear_bit(RT_FLAG_RS_IN_SYNC, &rs->runtime_flags); |
4102d9de | 3422 | clear_bit(RT_FLAG_RS_RESYNCING, &rs->runtime_flags); |
3a1c1ef2 HM |
3423 | |
3424 | if (rs_is_raid0(rs)) { | |
3425 | r = resync_max_sectors; | |
242ea5ad | 3426 | set_bit(RT_FLAG_RS_IN_SYNC, &rs->runtime_flags); |
3a1c1ef2 HM |
3427 | |
3428 | } else { | |
36a240a7 | 3429 | if (state == st_idle && !test_bit(MD_RECOVERY_INTR, &recovery)) |
41dcf197 | 3430 | r = mddev->recovery_cp; |
36a240a7 HM |
3431 | else |
3432 | r = mddev->curr_resync_completed; | |
3a1c1ef2 | 3433 | |
36a240a7 | 3434 | if (state == st_idle && r >= resync_max_sectors) { |
3a1c1ef2 HM |
3435 | /* |
3436 | * Sync complete. | |
3437 | */ | |
4102d9de HM |
3438 | /* In case we have finished recovering, the array is in sync. */ |
3439 | if (test_bit(MD_RECOVERY_RECOVER, &recovery)) | |
3440 | set_bit(RT_FLAG_RS_IN_SYNC, &rs->runtime_flags); | |
3441 | ||
36a240a7 | 3442 | } else if (state == st_recover) |
4102d9de HM |
3443 | /* |
3444 | * In case we are recovering, the array is not in sync | |
3445 | * and health chars should show the recovering legs. | |
53be73a5 HM |
3446 | * |
3447 | * Already retrieved recovery offset from curr_resync_completed above. | |
4102d9de HM |
3448 | */ |
3449 | ; | |
53be73a5 HM |
3450 | |
3451 | else if (state == st_resync || state == st_reshape) | |
dc15b943 | 3452 | /* |
53be73a5 | 3453 | * If "resync/reshape" is occurring, the raid set |
dc15b943 HM |
3454 | * is or may be out of sync hence the health |
3455 | * characters shall be 'a'. | |
3456 | */ | |
3457 | set_bit(RT_FLAG_RS_RESYNCING, &rs->runtime_flags); | |
3458 | ||
36a240a7 | 3459 | else if (state == st_check || state == st_repair) |
3a1c1ef2 HM |
3460 | /* |
3461 | * If "check" or "repair" is occurring, the raid set has | |
3462 | * undergone an initial sync and the health characters | |
3463 | * should not be 'a' anymore. | |
3464 | */ | |
242ea5ad | 3465 | set_bit(RT_FLAG_RS_IN_SYNC, &rs->runtime_flags); |
4102d9de | 3466 | |
53be73a5 | 3467 | else if (test_bit(MD_RECOVERY_NEEDED, &recovery)) |
4102d9de HM |
3468 | /* |
3469 | * We are idle and recovery is needed, prevent 'A' chars race | |
36a240a7 | 3470 | * caused by components still set to in-sync by constructor. |
4102d9de | 3471 | */ |
53be73a5 | 3472 | set_bit(RT_FLAG_RS_RESYNCING, &rs->runtime_flags); |
4102d9de | 3473 | |
53be73a5 | 3474 | else { |
3a1c1ef2 | 3475 | /* |
53be73a5 HM |
3476 | * We are idle and the raid set may be doing an initial |
3477 | * sync, or it may be rebuilding individual components. | |
3478 | * If all the devices are In_sync, then it is the raid set | |
3479 | * that is being initialized. | |
3a1c1ef2 | 3480 | */ |
53be73a5 HM |
3481 | struct md_rdev *rdev; |
3482 | ||
4102d9de | 3483 | set_bit(RT_FLAG_RS_IN_SYNC, &rs->runtime_flags); |
3a1c1ef2 | 3484 | rdev_for_each(rdev, mddev) |
63c32ed4 | 3485 | if (!test_bit(Journal, &rdev->flags) && |
4102d9de HM |
3486 | !test_bit(In_sync, &rdev->flags)) { |
3487 | clear_bit(RT_FLAG_RS_IN_SYNC, &rs->runtime_flags); | |
3488 | break; | |
3489 | } | |
2e727c3c | 3490 | } |
3a1c1ef2 HM |
3491 | } |
3492 | ||
4102d9de | 3493 | return min(r, resync_max_sectors); |
3a1c1ef2 HM |
3494 | } |
3495 | ||
3496 | /* Helper to return @dev name or "-" if !@dev */ | |
e6ca5e1a | 3497 | static const char *__get_dev_name(struct dm_dev *dev) |
3a1c1ef2 HM |
3498 | { |
3499 | return dev ? dev->name : "-"; | |
3500 | } | |
3501 | ||
3502 | static void raid_status(struct dm_target *ti, status_type_t type, | |
3503 | unsigned int status_flags, char *result, unsigned int maxlen) | |
3504 | { | |
3505 | struct raid_set *rs = ti->private; | |
3506 | struct mddev *mddev = &rs->md; | |
3507 | struct r5conf *conf = mddev->private; | |
7a7c330f | 3508 | int i, max_nr_stripes = conf ? conf->max_nr_stripes : 0; |
67143510 | 3509 | unsigned long recovery; |
3a1c1ef2 HM |
3510 | unsigned int raid_param_cnt = 1; /* at least 1 for chunksize */ |
3511 | unsigned int sz = 0; | |
43f3952a | 3512 | unsigned int rebuild_writemostly_count = 0; |
3a1c1ef2 | 3513 | sector_t progress, resync_max_sectors, resync_mismatches; |
53be73a5 | 3514 | enum sync_state state; |
3a1c1ef2 | 3515 | struct raid_type *rt; |
3a1c1ef2 HM |
3516 | |
3517 | switch (type) { | |
3518 | case STATUSTYPE_INFO: | |
3519 | /* *Should* always succeed */ | |
3520 | rt = get_raid_type_by_ll(mddev->new_level, mddev->new_layout); | |
3521 | if (!rt) | |
3522 | return; | |
3523 | ||
9dbd1aa3 | 3524 | DMEMIT("%s %d ", rt->name, mddev->raid_disks); |
3a1c1ef2 HM |
3525 | |
3526 | /* Access most recent mddev properties for status output */ | |
3527 | smp_rmb(); | |
3528 | /* Get sensible max sectors even if raid set not yet started */ | |
4286325b | 3529 | resync_max_sectors = test_bit(RT_FLAG_RS_PRERESUMED, &rs->runtime_flags) ? |
3a1c1ef2 | 3530 | mddev->resync_max_sectors : mddev->dev_sectors; |
53be73a5 HM |
3531 | recovery = rs->md.recovery; |
3532 | state = decipher_sync_action(mddev, recovery); | |
3533 | progress = rs_get_progress(rs, recovery, state, resync_max_sectors); | |
3a1c1ef2 | 3534 | resync_mismatches = (mddev->last_sync_action && !strcasecmp(mddev->last_sync_action, "check")) ? |
9dbd1aa3 | 3535 | atomic64_read(&mddev->resync_mismatches) : 0; |
3a1c1ef2 | 3536 | |
c63ede3b HM |
3537 | /* HM FIXME: do we want another state char for raid0? It shows 'D'/'A'/'-' now */ |
3538 | for (i = 0; i < rs->raid_disks; i++) | |
242ea5ad | 3539 | DMEMIT(__raid_dev_status(rs, &rs->dev[i].rdev)); |
9d09e663 | 3540 | |
2e727c3c | 3541 | /* |
3a1c1ef2 | 3542 | * In-sync/Reshape ratio: |
2e727c3c | 3543 | * The in-sync ratio shows the progress of: |
3a1c1ef2 HM |
3544 | * - Initializing the raid set |
3545 | * - Rebuilding a subset of devices of the raid set | |
2e727c3c JB |
3546 | * The user can distinguish between the two by referring |
3547 | * to the status characters. | |
3a1c1ef2 HM |
3548 | * |
3549 | * The reshape ratio shows the progress of | |
3550 | * changing the raid layout or the number of | |
3551 | * disks of a raid set | |
2e727c3c | 3552 | */ |
3a1c1ef2 HM |
3553 | DMEMIT(" %llu/%llu", (unsigned long long) progress, |
3554 | (unsigned long long) resync_max_sectors); | |
9d09e663 | 3555 | |
be83651f | 3556 | /* |
3a1c1ef2 HM |
3557 | * v1.5.0+: |
3558 | * | |
be83651f | 3559 | * Sync action: |
6cf2a73c | 3560 | * See Documentation/admin-guide/device-mapper/dm-raid.rst for |
be83651f JB |
3561 | * information on each of these states. |
3562 | */ | |
53be73a5 | 3563 | DMEMIT(" %s", sync_str(state)); |
be83651f JB |
3564 | |
3565 | /* | |
3a1c1ef2 HM |
3566 | * v1.5.0+: |
3567 | * | |
be83651f JB |
3568 | * resync_mismatches/mismatch_cnt |
3569 | * This field shows the number of discrepancies found when | |
3a1c1ef2 | 3570 | * performing a "check" of the raid set. |
be83651f | 3571 | */ |
3a1c1ef2 | 3572 | DMEMIT(" %llu", (unsigned long long) resync_mismatches); |
9d09e663 | 3573 | |
3a1c1ef2 | 3574 | /* |
9b6e5423 | 3575 | * v1.9.0+: |
3a1c1ef2 HM |
3576 | * |
3577 | * data_offset (needed for out of space reshaping) | |
3578 | * This field shows the data offset into the data | |
3579 | * image LV where the first stripes data starts. | |
3580 | * | |
3581 | * We keep data_offset equal on all raid disks of the set, | |
3582 | * so retrieving it from the first raid disk is sufficient. | |
3583 | */ | |
3584 | DMEMIT(" %llu", (unsigned long long) rs->dev[0].rdev.data_offset); | |
63c32ed4 HM |
3585 | |
3586 | /* | |
3587 | * v1.10.0+: | |
3588 | */ | |
3589 | DMEMIT(" %s", test_bit(__CTR_FLAG_JOURNAL_DEV, &rs->ctr_flags) ? | |
242ea5ad | 3590 | __raid_dev_status(rs, &rs->journal_dev.rdev) : "-"); |
3a1c1ef2 | 3591 | break; |
9d09e663 | 3592 | |
3a1c1ef2 HM |
3593 | case STATUSTYPE_TABLE: |
3594 | /* Report the table line string you would use to construct this raid set */ | |
3595 | ||
43f3952a HM |
3596 | /* |
3597 | * Count any rebuild or writemostly argument pairs and subtract the | |
3598 | * hweight count being added below of any rebuild and writemostly ctr flags. | |
3599 | */ | |
3600 | for (i = 0; i < rs->raid_disks; i++) { | |
3601 | rebuild_writemostly_count += (test_bit(i, (void *) rs->rebuild_disks) ? 2 : 0) + | |
3602 | (test_bit(WriteMostly, &rs->dev[i].rdev.flags) ? 2 : 0); | |
3603 | } | |
3604 | rebuild_writemostly_count -= (test_bit(__CTR_FLAG_REBUILD, &rs->ctr_flags) ? 2 : 0) + | |
3605 | (test_bit(__CTR_FLAG_WRITE_MOSTLY, &rs->ctr_flags) ? 2 : 0); | |
3606 | /* Calculate raid parameter count based on ^ rebuild/writemostly argument counts and ctr flags set. */ | |
3607 | raid_param_cnt += rebuild_writemostly_count + | |
3a1c1ef2 | 3608 | hweight32(rs->ctr_flags & CTR_FLAG_OPTIONS_NO_ARGS) + |
43f3952a | 3609 | hweight32(rs->ctr_flags & CTR_FLAG_OPTIONS_ONE_ARG) * 2; |
3a1c1ef2 | 3610 | /* Emit table line */ |
4464e36e | 3611 | /* This has to be in the documented order for userspace! */ |
3a1c1ef2 | 3612 | DMEMIT("%s %u %u", rs->raid_type->name, raid_param_cnt, mddev->new_chunk_sectors); |
4286325b | 3613 | if (test_bit(__CTR_FLAG_SYNC, &rs->ctr_flags)) |
3fa6cf38 | 3614 | DMEMIT(" %s", dm_raid_arg_name_by_flag(CTR_FLAG_SYNC)); |
4464e36e HM |
3615 | if (test_bit(__CTR_FLAG_NOSYNC, &rs->ctr_flags)) |
3616 | DMEMIT(" %s", dm_raid_arg_name_by_flag(CTR_FLAG_NOSYNC)); | |
43f3952a | 3617 | if (test_bit(__CTR_FLAG_REBUILD, &rs->ctr_flags)) |
7a7c330f | 3618 | for (i = 0; i < rs->raid_disks; i++) |
43f3952a HM |
3619 | if (test_bit(i, (void *) rs->rebuild_disks)) |
3620 | DMEMIT(" %s %u", dm_raid_arg_name_by_flag(CTR_FLAG_REBUILD), i); | |
4464e36e HM |
3621 | if (test_bit(__CTR_FLAG_DAEMON_SLEEP, &rs->ctr_flags)) |
3622 | DMEMIT(" %s %lu", dm_raid_arg_name_by_flag(CTR_FLAG_DAEMON_SLEEP), | |
3623 | mddev->bitmap_info.daemon_sleep); | |
3624 | if (test_bit(__CTR_FLAG_MIN_RECOVERY_RATE, &rs->ctr_flags)) | |
3625 | DMEMIT(" %s %d", dm_raid_arg_name_by_flag(CTR_FLAG_MIN_RECOVERY_RATE), | |
3626 | mddev->sync_speed_min); | |
3627 | if (test_bit(__CTR_FLAG_MAX_RECOVERY_RATE, &rs->ctr_flags)) | |
3628 | DMEMIT(" %s %d", dm_raid_arg_name_by_flag(CTR_FLAG_MAX_RECOVERY_RATE), | |
3629 | mddev->sync_speed_max); | |
43f3952a | 3630 | if (test_bit(__CTR_FLAG_WRITE_MOSTLY, &rs->ctr_flags)) |
7a7c330f HM |
3631 | for (i = 0; i < rs->raid_disks; i++) |
3632 | if (test_bit(WriteMostly, &rs->dev[i].rdev.flags)) | |
3633 | DMEMIT(" %s %d", dm_raid_arg_name_by_flag(CTR_FLAG_WRITE_MOSTLY), | |
3634 | rs->dev[i].rdev.raid_disk); | |
4286325b | 3635 | if (test_bit(__CTR_FLAG_MAX_WRITE_BEHIND, &rs->ctr_flags)) |
3fa6cf38 | 3636 | DMEMIT(" %s %lu", dm_raid_arg_name_by_flag(CTR_FLAG_MAX_WRITE_BEHIND), |
3a1c1ef2 | 3637 | mddev->bitmap_info.max_write_behind); |
4464e36e HM |
3638 | if (test_bit(__CTR_FLAG_STRIPE_CACHE, &rs->ctr_flags)) |
3639 | DMEMIT(" %s %d", dm_raid_arg_name_by_flag(CTR_FLAG_STRIPE_CACHE), | |
3640 | max_nr_stripes); | |
3641 | if (test_bit(__CTR_FLAG_REGION_SIZE, &rs->ctr_flags)) | |
3642 | DMEMIT(" %s %llu", dm_raid_arg_name_by_flag(CTR_FLAG_REGION_SIZE), | |
3643 | (unsigned long long) to_sector(mddev->bitmap_info.chunksize)); | |
3644 | if (test_bit(__CTR_FLAG_RAID10_COPIES, &rs->ctr_flags)) | |
3645 | DMEMIT(" %s %d", dm_raid_arg_name_by_flag(CTR_FLAG_RAID10_COPIES), | |
3646 | raid10_md_layout_to_copies(mddev->layout)); | |
3647 | if (test_bit(__CTR_FLAG_RAID10_FORMAT, &rs->ctr_flags)) | |
3648 | DMEMIT(" %s %s", dm_raid_arg_name_by_flag(CTR_FLAG_RAID10_FORMAT), | |
3649 | raid10_md_layout_to_format(mddev->layout)); | |
3650 | if (test_bit(__CTR_FLAG_DELTA_DISKS, &rs->ctr_flags)) | |
3651 | DMEMIT(" %s %d", dm_raid_arg_name_by_flag(CTR_FLAG_DELTA_DISKS), | |
3652 | max(rs->delta_disks, mddev->delta_disks)); | |
3653 | if (test_bit(__CTR_FLAG_DATA_OFFSET, &rs->ctr_flags)) | |
3654 | DMEMIT(" %s %llu", dm_raid_arg_name_by_flag(CTR_FLAG_DATA_OFFSET), | |
3655 | (unsigned long long) rs->data_offset); | |
63c32ed4 HM |
3656 | if (test_bit(__CTR_FLAG_JOURNAL_DEV, &rs->ctr_flags)) |
3657 | DMEMIT(" %s %s", dm_raid_arg_name_by_flag(CTR_FLAG_JOURNAL_DEV), | |
3658 | __get_dev_name(rs->journal_dev.dev)); | |
6e53636f HM |
3659 | if (test_bit(__CTR_FLAG_JOURNAL_MODE, &rs->ctr_flags)) |
3660 | DMEMIT(" %s %s", dm_raid_arg_name_by_flag(CTR_FLAG_JOURNAL_MODE), | |
3661 | md_journal_mode_to_dm_raid(rs->journal_dev.mode)); | |
3a1c1ef2 | 3662 | DMEMIT(" %d", rs->raid_disks); |
7a7c330f HM |
3663 | for (i = 0; i < rs->raid_disks; i++) |
3664 | DMEMIT(" %s %s", __get_dev_name(rs->dev[i].meta_dev), | |
3665 | __get_dev_name(rs->dev[i].data_dev)); | |
9d09e663 | 3666 | } |
9d09e663 N |
3667 | } |
3668 | ||
1eb5fa84 MS |
3669 | static int raid_message(struct dm_target *ti, unsigned int argc, char **argv, |
3670 | char *result, unsigned maxlen) | |
be83651f JB |
3671 | { |
3672 | struct raid_set *rs = ti->private; | |
3673 | struct mddev *mddev = &rs->md; | |
3674 | ||
be83651f JB |
3675 | if (!mddev->pers || !mddev->pers->sync_request) |
3676 | return -EINVAL; | |
3677 | ||
3678 | if (!strcasecmp(argv[0], "frozen")) | |
3679 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
3680 | else | |
3681 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
3682 | ||
3683 | if (!strcasecmp(argv[0], "idle") || !strcasecmp(argv[0], "frozen")) { | |
3684 | if (mddev->sync_thread) { | |
3685 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
3686 | md_reap_sync_thread(mddev); | |
3687 | } | |
74694bcb | 3688 | } else if (decipher_sync_action(mddev, mddev->recovery) != st_idle) |
be83651f JB |
3689 | return -EBUSY; |
3690 | else if (!strcasecmp(argv[0], "resync")) | |
3a1c1ef2 HM |
3691 | ; /* MD_RECOVERY_NEEDED set below */ |
3692 | else if (!strcasecmp(argv[0], "recover")) | |
be83651f | 3693 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
3a1c1ef2 | 3694 | else { |
ad470472 | 3695 | if (!strcasecmp(argv[0], "check")) { |
be83651f | 3696 | set_bit(MD_RECOVERY_CHECK, &mddev->recovery); |
ad470472 MS |
3697 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
3698 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
3699 | } else if (!strcasecmp(argv[0], "repair")) { | |
105db599 MS |
3700 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
3701 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
3702 | } else | |
be83651f | 3703 | return -EINVAL; |
be83651f JB |
3704 | } |
3705 | if (mddev->ro == 2) { | |
3706 | /* A write to sync_action is enough to justify | |
3707 | * canceling read-auto mode | |
3708 | */ | |
3709 | mddev->ro = 0; | |
3a1c1ef2 | 3710 | if (!mddev->suspended && mddev->sync_thread) |
be83651f JB |
3711 | md_wakeup_thread(mddev->sync_thread); |
3712 | } | |
3713 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
3a1c1ef2 | 3714 | if (!mddev->suspended && mddev->thread) |
be83651f JB |
3715 | md_wakeup_thread(mddev->thread); |
3716 | ||
3717 | return 0; | |
3718 | } | |
3719 | ||
3720 | static int raid_iterate_devices(struct dm_target *ti, | |
3721 | iterate_devices_callout_fn fn, void *data) | |
9d09e663 N |
3722 | { |
3723 | struct raid_set *rs = ti->private; | |
094f394d | 3724 | unsigned int i; |
73c6f239 | 3725 | int r = 0; |
9d09e663 | 3726 | |
73c6f239 | 3727 | for (i = 0; !r && i < rs->md.raid_disks; i++) |
9d09e663 | 3728 | if (rs->dev[i].data_dev) |
73c6f239 | 3729 | r = fn(ti, |
9d09e663 N |
3730 | rs->dev[i].data_dev, |
3731 | 0, /* No offset on data devs */ | |
3732 | rs->md.dev_sectors, | |
3733 | data); | |
3734 | ||
73c6f239 | 3735 | return r; |
9d09e663 N |
3736 | } |
3737 | ||
3738 | static void raid_io_hints(struct dm_target *ti, struct queue_limits *limits) | |
3739 | { | |
3740 | struct raid_set *rs = ti->private; | |
c8156fc7 | 3741 | unsigned int chunk_size_bytes = to_bytes(rs->md.chunk_sectors); |
9d09e663 | 3742 | |
c8156fc7 ML |
3743 | blk_limits_io_min(limits, chunk_size_bytes); |
3744 | blk_limits_io_opt(limits, chunk_size_bytes * mddev_data_stripes(rs)); | |
61697a6a MS |
3745 | |
3746 | /* | |
3747 | * RAID1 and RAID10 personalities require bio splitting, | |
3748 | * RAID0/4/5/6 don't and process large discard bios properly. | |
3749 | */ | |
3750 | if (rs_is_raid1(rs) || rs_is_raid10(rs)) { | |
c8156fc7 ML |
3751 | limits->discard_granularity = chunk_size_bytes; |
3752 | limits->max_discard_sectors = rs->md.chunk_sectors; | |
61697a6a | 3753 | } |
9d09e663 N |
3754 | } |
3755 | ||
9d09e663 N |
3756 | static void raid_postsuspend(struct dm_target *ti) |
3757 | { | |
3758 | struct raid_set *rs = ti->private; | |
3759 | ||
4d5324f7 | 3760 | if (!test_and_set_bit(RT_FLAG_RS_SUSPENDED, &rs->runtime_flags)) { |
1af2048a HM |
3761 | /* Writes have to be stopped before suspending to avoid deadlocks. */ |
3762 | if (!test_bit(MD_RECOVERY_FROZEN, &rs->md.recovery)) | |
3763 | md_stop_writes(&rs->md); | |
3764 | ||
4d5324f7 | 3765 | mddev_lock_nointr(&rs->md); |
31e10a41 | 3766 | mddev_suspend(&rs->md); |
4d5324f7 N |
3767 | mddev_unlock(&rs->md); |
3768 | } | |
9d09e663 N |
3769 | } |
3770 | ||
f381e71b | 3771 | static void attempt_restore_of_faulty_devices(struct raid_set *rs) |
9d09e663 | 3772 | { |
9092c02d | 3773 | int i; |
a3c06a38 | 3774 | uint64_t cleared_failed_devices[DISKS_ARRAY_ELEMS]; |
9092c02d | 3775 | unsigned long flags; |
a3c06a38 | 3776 | bool cleared = false; |
9092c02d | 3777 | struct dm_raid_superblock *sb; |
a3c06a38 | 3778 | struct mddev *mddev = &rs->md; |
9092c02d | 3779 | struct md_rdev *r; |
9d09e663 | 3780 | |
a3c06a38 HM |
3781 | /* RAID personalities have to provide hot add/remove methods or we need to bail out. */ |
3782 | if (!mddev->pers || !mddev->pers->hot_add_disk || !mddev->pers->hot_remove_disk) | |
3783 | return; | |
3784 | ||
3785 | memset(cleared_failed_devices, 0, sizeof(cleared_failed_devices)); | |
3786 | ||
c63ede3b | 3787 | for (i = 0; i < mddev->raid_disks; i++) { |
f381e71b | 3788 | r = &rs->dev[i].rdev; |
63c32ed4 HM |
3789 | /* HM FIXME: enhance journal device recovery processing */ |
3790 | if (test_bit(Journal, &r->flags)) | |
3791 | continue; | |
3792 | ||
e2568465 HM |
3793 | if (test_bit(Faulty, &r->flags) && |
3794 | r->meta_bdev && !read_disk_sb(r, r->sb_size, true)) { | |
f381e71b JB |
3795 | DMINFO("Faulty %s device #%d has readable super block." |
3796 | " Attempting to revive it.", | |
3797 | rs->raid_type->name, i); | |
a4dc163a JB |
3798 | |
3799 | /* | |
3800 | * Faulty bit may be set, but sometimes the array can | |
3801 | * be suspended before the personalities can respond | |
3802 | * by removing the device from the array (i.e. calling | |
43157840 | 3803 | * 'hot_remove_disk'). If they haven't yet removed |
a4dc163a JB |
3804 | * the failed device, its 'raid_disk' number will be |
3805 | * '>= 0' - meaning we must call this function | |
3806 | * ourselves. | |
3807 | */ | |
f381e71b | 3808 | flags = r->flags; |
c63ede3b HM |
3809 | clear_bit(In_sync, &r->flags); /* Mandatory for hot remove. */ |
3810 | if (r->raid_disk >= 0) { | |
3811 | if (mddev->pers->hot_remove_disk(mddev, r)) { | |
3812 | /* Failed to revive this device, try next */ | |
3813 | r->flags = flags; | |
3814 | continue; | |
3815 | } | |
3816 | } else | |
3817 | r->raid_disk = r->saved_raid_disk = i; | |
3818 | ||
f381e71b JB |
3819 | clear_bit(Faulty, &r->flags); |
3820 | clear_bit(WriteErrorSeen, &r->flags); | |
c63ede3b | 3821 | |
a3c06a38 | 3822 | if (mddev->pers->hot_add_disk(mddev, r)) { |
c63ede3b HM |
3823 | /* Failed to revive this device, try next */ |
3824 | r->raid_disk = r->saved_raid_disk = -1; | |
f381e71b JB |
3825 | r->flags = flags; |
3826 | } else { | |
c63ede3b | 3827 | clear_bit(In_sync, &r->flags); |
f381e71b | 3828 | r->recovery_offset = 0; |
a3c06a38 HM |
3829 | set_bit(i, (void *) cleared_failed_devices); |
3830 | cleared = true; | |
f381e71b JB |
3831 | } |
3832 | } | |
3833 | } | |
a3c06a38 HM |
3834 | |
3835 | /* If any failed devices could be cleared, update all sbs failed_devices bits */ | |
3836 | if (cleared) { | |
3837 | uint64_t failed_devices[DISKS_ARRAY_ELEMS]; | |
3838 | ||
f381e71b | 3839 | rdev_for_each(r, &rs->md) { |
63c32ed4 HM |
3840 | if (test_bit(Journal, &r->flags)) |
3841 | continue; | |
3842 | ||
f381e71b | 3843 | sb = page_address(r->sb_page); |
a3c06a38 HM |
3844 | sb_retrieve_failed_devices(sb, failed_devices); |
3845 | ||
3846 | for (i = 0; i < DISKS_ARRAY_ELEMS; i++) | |
3847 | failed_devices[i] &= ~cleared_failed_devices[i]; | |
3848 | ||
3849 | sb_update_failed_devices(sb, failed_devices); | |
f381e71b JB |
3850 | } |
3851 | } | |
3852 | } | |
3853 | ||
e6ca5e1a | 3854 | static int __load_dirty_region_bitmap(struct raid_set *rs) |
ecbfb9f1 HM |
3855 | { |
3856 | int r = 0; | |
3857 | ||
3858 | /* Try loading the bitmap unless "raid0", which does not have one */ | |
3859 | if (!rs_is_raid0(rs) && | |
4286325b | 3860 | !test_and_set_bit(RT_FLAG_RS_BITMAP_LOADED, &rs->runtime_flags)) { |
e64e4018 | 3861 | r = md_bitmap_load(&rs->md); |
ecbfb9f1 HM |
3862 | if (r) |
3863 | DMERR("Failed to load bitmap"); | |
3864 | } | |
3865 | ||
3866 | return r; | |
3867 | } | |
3868 | ||
6e20902e HM |
3869 | /* Enforce updating all superblocks */ |
3870 | static void rs_update_sbs(struct raid_set *rs) | |
3871 | { | |
3872 | struct mddev *mddev = &rs->md; | |
3873 | int ro = mddev->ro; | |
3874 | ||
2953079c | 3875 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
6e20902e HM |
3876 | mddev->ro = 0; |
3877 | md_update_sb(mddev, 1); | |
3878 | mddev->ro = ro; | |
3879 | } | |
3880 | ||
9dbd1aa3 HM |
3881 | /* |
3882 | * Reshape changes raid algorithm of @rs to new one within personality | |
3883 | * (e.g. raid6_zr -> raid6_nc), changes stripe size, adds/removes | |
3884 | * disks from a raid set thus growing/shrinking it or resizes the set | |
3885 | * | |
3886 | * Call mddev_lock_nointr() before! | |
3887 | */ | |
3888 | static int rs_start_reshape(struct raid_set *rs) | |
3889 | { | |
3890 | int r; | |
3891 | struct mddev *mddev = &rs->md; | |
3892 | struct md_personality *pers = mddev->pers; | |
3893 | ||
644e2537 HM |
3894 | /* Don't allow the sync thread to work until the table gets reloaded. */ |
3895 | set_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
3896 | ||
9dbd1aa3 HM |
3897 | r = rs_setup_reshape(rs); |
3898 | if (r) | |
3899 | return r; | |
3900 | ||
9dbd1aa3 HM |
3901 | /* |
3902 | * Check any reshape constraints enforced by the personalility | |
3903 | * | |
3904 | * May as well already kick the reshape off so that * pers->start_reshape() becomes optional. | |
3905 | */ | |
3906 | r = pers->check_reshape(mddev); | |
3907 | if (r) { | |
3908 | rs->ti->error = "pers->check_reshape() failed"; | |
3909 | return r; | |
3910 | } | |
3911 | ||
3912 | /* | |
3913 | * Personality may not provide start reshape method in which | |
3914 | * case check_reshape above has already covered everything | |
3915 | */ | |
3916 | if (pers->start_reshape) { | |
3917 | r = pers->start_reshape(mddev); | |
3918 | if (r) { | |
3919 | rs->ti->error = "pers->start_reshape() failed"; | |
3920 | return r; | |
3921 | } | |
3922 | } | |
3923 | ||
6e20902e HM |
3924 | /* |
3925 | * Now reshape got set up, update superblocks to | |
3926 | * reflect the fact so that a table reload will | |
3927 | * access proper superblock content in the ctr. | |
3928 | */ | |
3929 | rs_update_sbs(rs); | |
9dbd1aa3 HM |
3930 | |
3931 | return 0; | |
3932 | } | |
3933 | ||
ecbfb9f1 HM |
3934 | static int raid_preresume(struct dm_target *ti) |
3935 | { | |
9dbd1aa3 | 3936 | int r; |
ecbfb9f1 HM |
3937 | struct raid_set *rs = ti->private; |
3938 | struct mddev *mddev = &rs->md; | |
3939 | ||
11e47232 | 3940 | /* This is a resume after a suspend of the set -> it's already started. */ |
4286325b | 3941 | if (test_and_set_bit(RT_FLAG_RS_PRERESUMED, &rs->runtime_flags)) |
ecbfb9f1 HM |
3942 | return 0; |
3943 | ||
3944 | /* | |
3945 | * The superblocks need to be updated on disk if the | |
6e20902e HM |
3946 | * array is new or new devices got added (thus zeroed |
3947 | * out by userspace) or __load_dirty_region_bitmap | |
3948 | * will overwrite them in core with old data or fail. | |
ecbfb9f1 | 3949 | */ |
6e20902e HM |
3950 | if (test_bit(RT_FLAG_UPDATE_SBS, &rs->runtime_flags)) |
3951 | rs_update_sbs(rs); | |
ecbfb9f1 | 3952 | |
ecbfb9f1 | 3953 | /* Load the bitmap from disk unless raid0 */ |
9dbd1aa3 HM |
3954 | r = __load_dirty_region_bitmap(rs); |
3955 | if (r) | |
3956 | return r; | |
3957 | ||
99273d9e HM |
3958 | /* We are extending the raid set size, adjust mddev/md_rdev sizes and set capacity. */ |
3959 | if (test_bit(RT_FLAG_RS_GROW, &rs->runtime_flags)) { | |
3960 | mddev->array_sectors = rs->array_sectors; | |
3961 | mddev->dev_sectors = rs->dev_sectors; | |
3962 | rs_set_rdev_sectors(rs); | |
3963 | rs_set_capacity(rs); | |
3964 | } | |
3965 | ||
3966 | /* Resize bitmap to adjust to changed region size (aka MD bitmap chunksize) or grown device size */ | |
3967 | if (test_bit(RT_FLAG_RS_BITMAP_LOADED, &rs->runtime_flags) && mddev->bitmap && | |
3968 | (test_bit(RT_FLAG_RS_GROW, &rs->runtime_flags) || | |
3969 | (rs->requested_bitmap_chunk_sectors && | |
3970 | mddev->bitmap_info.chunksize != to_bytes(rs->requested_bitmap_chunk_sectors)))) { | |
3971 | int chunksize = to_bytes(rs->requested_bitmap_chunk_sectors) ?: mddev->bitmap_info.chunksize; | |
3972 | ||
3973 | r = md_bitmap_resize(mddev->bitmap, mddev->dev_sectors, chunksize, 0); | |
4257e085 HM |
3974 | if (r) |
3975 | DMERR("Failed to resize bitmap"); | |
3976 | } | |
3977 | ||
9dbd1aa3 HM |
3978 | /* Check for any resize/reshape on @rs and adjust/initiate */ |
3979 | /* Be prepared for mddev_resume() in raid_resume() */ | |
3980 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
3981 | if (mddev->recovery_cp && mddev->recovery_cp < MaxSector) { | |
99273d9e | 3982 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
9dbd1aa3 | 3983 | mddev->resync_min = mddev->recovery_cp; |
99273d9e HM |
3984 | if (test_bit(RT_FLAG_RS_GROW, &rs->runtime_flags)) |
3985 | mddev->resync_max_sectors = mddev->dev_sectors; | |
9dbd1aa3 HM |
3986 | } |
3987 | ||
345a6cdc | 3988 | /* Check for any reshape request unless new raid set */ |
d39f0010 | 3989 | if (test_bit(RT_FLAG_RESHAPE_RS, &rs->runtime_flags)) { |
9dbd1aa3 | 3990 | /* Initiate a reshape. */ |
61e06e2c | 3991 | rs_set_rdev_sectors(rs); |
9dbd1aa3 HM |
3992 | mddev_lock_nointr(mddev); |
3993 | r = rs_start_reshape(rs); | |
3994 | mddev_unlock(mddev); | |
3995 | if (r) | |
3996 | DMWARN("Failed to check/start reshape, continuing without change"); | |
3997 | r = 0; | |
3998 | } | |
3999 | ||
4000 | return r; | |
ecbfb9f1 HM |
4001 | } |
4002 | ||
f381e71b JB |
4003 | static void raid_resume(struct dm_target *ti) |
4004 | { | |
4005 | struct raid_set *rs = ti->private; | |
ecbfb9f1 | 4006 | struct mddev *mddev = &rs->md; |
f381e71b | 4007 | |
4286325b | 4008 | if (test_and_set_bit(RT_FLAG_RS_RESUMED, &rs->runtime_flags)) { |
ecbfb9f1 HM |
4009 | /* |
4010 | * A secondary resume while the device is active. | |
4011 | * Take this opportunity to check whether any failed | |
4012 | * devices are reachable again. | |
4013 | */ | |
4014 | attempt_restore_of_faulty_devices(rs); | |
31e10a41 | 4015 | } |
34f8ac6d | 4016 | |
4d5324f7 | 4017 | if (test_and_clear_bit(RT_FLAG_RS_SUSPENDED, &rs->runtime_flags)) { |
11e47232 HM |
4018 | /* Only reduce raid set size before running a disk removing reshape. */ |
4019 | if (mddev->delta_disks < 0) | |
4020 | rs_set_capacity(rs); | |
4021 | ||
4d5324f7 | 4022 | mddev_lock_nointr(mddev); |
11e47232 | 4023 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
78a75d10 HM |
4024 | mddev->ro = 0; |
4025 | mddev->in_sync = 0; | |
31e10a41 | 4026 | mddev_resume(mddev); |
4d5324f7 N |
4027 | mddev_unlock(mddev); |
4028 | } | |
9d09e663 N |
4029 | } |
4030 | ||
4031 | static struct target_type raid_target = { | |
4032 | .name = "raid", | |
43f3952a | 4033 | .version = {1, 15, 1}, |
9d09e663 N |
4034 | .module = THIS_MODULE, |
4035 | .ctr = raid_ctr, | |
4036 | .dtr = raid_dtr, | |
4037 | .map = raid_map, | |
4038 | .status = raid_status, | |
be83651f | 4039 | .message = raid_message, |
9d09e663 N |
4040 | .iterate_devices = raid_iterate_devices, |
4041 | .io_hints = raid_io_hints, | |
9d09e663 | 4042 | .postsuspend = raid_postsuspend, |
ecbfb9f1 | 4043 | .preresume = raid_preresume, |
9d09e663 N |
4044 | .resume = raid_resume, |
4045 | }; | |
4046 | ||
4047 | static int __init dm_raid_init(void) | |
4048 | { | |
fe5d2f4a JB |
4049 | DMINFO("Loading target version %u.%u.%u", |
4050 | raid_target.version[0], | |
4051 | raid_target.version[1], | |
4052 | raid_target.version[2]); | |
9d09e663 N |
4053 | return dm_register_target(&raid_target); |
4054 | } | |
4055 | ||
4056 | static void __exit dm_raid_exit(void) | |
4057 | { | |
4058 | dm_unregister_target(&raid_target); | |
4059 | } | |
4060 | ||
4061 | module_init(dm_raid_init); | |
4062 | module_exit(dm_raid_exit); | |
4063 | ||
48cf06bc HM |
4064 | module_param(devices_handle_discard_safely, bool, 0644); |
4065 | MODULE_PARM_DESC(devices_handle_discard_safely, | |
4066 | "Set to Y if all devices in each array reliably return zeroes on reads from discarded regions"); | |
4067 | ||
ef9b85a6 MS |
4068 | MODULE_DESCRIPTION(DM_NAME " raid0/1/10/4/5/6 target"); |
4069 | MODULE_ALIAS("dm-raid0"); | |
63f33b8d JB |
4070 | MODULE_ALIAS("dm-raid1"); |
4071 | MODULE_ALIAS("dm-raid10"); | |
9d09e663 N |
4072 | MODULE_ALIAS("dm-raid4"); |
4073 | MODULE_ALIAS("dm-raid5"); | |
4074 | MODULE_ALIAS("dm-raid6"); | |
4075 | MODULE_AUTHOR("Neil Brown <dm-devel@redhat.com>"); | |
3a1c1ef2 | 4076 | MODULE_AUTHOR("Heinz Mauelshagen <dm-devel@redhat.com>"); |
9d09e663 | 4077 | MODULE_LICENSE("GPL"); |