NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010-2011 Neil Brown |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 3 | * Copyright (C) 2010-2016 Red Hat, Inc. All rights reserved. |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 4 | * |
| 5 | * This file is released under the GPL. |
| 6 | */ |
| 7 | |
| 8 | #include <linux/slab.h> |
Paul Gortmaker | 056075c | 2011-07-03 13:58:33 -0400 | [diff] [blame] | 9 | #include <linux/module.h> |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 10 | |
| 11 | #include "md.h" |
Jonathan Brassow | 3273727 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 12 | #include "raid1.h" |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 13 | #include "raid5.h" |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 14 | #include "raid10.h" |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 15 | #include "bitmap.h" |
| 16 | |
Alasdair G Kergon | 3e8dbb7 | 2011-08-02 12:32:03 +0100 | [diff] [blame] | 17 | #include <linux/device-mapper.h> |
| 18 | |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 19 | #define DM_MSG_PREFIX "raid" |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 20 | #define MAX_RAID_DEVICES 253 /* md-raid kernel limit */ |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 21 | |
Heinz Mauelshagen | 48cf06b | 2014-09-24 17:47:19 +0200 | [diff] [blame] | 22 | static bool devices_handle_discard_safely = false; |
| 23 | |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 24 | /* |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 25 | * The following flags are used by dm-raid.c to set up the array state. |
| 26 | * They must be cleared before md_run is called. |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 27 | */ |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 28 | #define FirstUse 10 /* rdev flag */ |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 29 | |
| 30 | struct raid_dev { |
| 31 | /* |
| 32 | * Two DM devices, one to hold metadata and one to hold the |
| 33 | * actual data/parity. The reason for this is to not confuse |
| 34 | * ti->len and give more flexibility in altering size and |
| 35 | * characteristics. |
| 36 | * |
| 37 | * While it is possible for this device to be associated |
| 38 | * with a different physical device than the data_dev, it |
| 39 | * is intended for it to be the same. |
| 40 | * |--------- Physical Device ---------| |
| 41 | * |- meta_dev -|------ data_dev ------| |
| 42 | */ |
| 43 | struct dm_dev *meta_dev; |
| 44 | struct dm_dev *data_dev; |
NeilBrown | 3cb0300 | 2011-10-11 16:45:26 +1100 | [diff] [blame] | 45 | struct md_rdev rdev; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 46 | }; |
| 47 | |
| 48 | /* |
Heinz Mauelshagen | c76d53f | 2015-04-29 14:03:00 +0200 | [diff] [blame] | 49 | * Flags for rs->ctr_flags field. |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 50 | * |
| 51 | * 1 = no flag value |
| 52 | * 2 = flag with value |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 53 | */ |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 54 | #define CTR_FLAG_SYNC 0x1 /* 1 */ /* Not with raid0! */ |
| 55 | #define CTR_FLAG_NOSYNC 0x2 /* 1 */ /* Not with raid0! */ |
| 56 | #define CTR_FLAG_REBUILD 0x4 /* 2 */ /* Not with raid0! */ |
| 57 | #define CTR_FLAG_DAEMON_SLEEP 0x8 /* 2 */ /* Not with raid0! */ |
| 58 | #define CTR_FLAG_MIN_RECOVERY_RATE 0x10 /* 2 */ /* Not with raid0! */ |
| 59 | #define CTR_FLAG_MAX_RECOVERY_RATE 0x20 /* 2 */ /* Not with raid0! */ |
| 60 | #define CTR_FLAG_MAX_WRITE_BEHIND 0x40 /* 2 */ /* Only with raid1! */ |
| 61 | #define CTR_FLAG_WRITE_MOSTLY 0x80 /* 2 */ /* Only with raid1! */ |
| 62 | #define CTR_FLAG_STRIPE_CACHE 0x100 /* 2 */ /* Only with raid4/5/6! */ |
| 63 | #define CTR_FLAG_REGION_SIZE 0x200 /* 2 */ /* Not with raid0! */ |
| 64 | #define CTR_FLAG_RAID10_COPIES 0x400 /* 2 */ /* Only with raid10 */ |
| 65 | #define CTR_FLAG_RAID10_FORMAT 0x800 /* 2 */ /* Only with raid10 */ |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 66 | |
Heinz Mauelshagen | f090279 | 2016-05-19 18:49:27 +0200 | [diff] [blame] | 67 | /* |
| 68 | * Definitions of various constructor flags to |
| 69 | * be used in checks of valid / invalid flags |
| 70 | * per raid level. |
| 71 | */ |
| 72 | /* Define all any sync flags */ |
| 73 | #define CTR_FLAGS_ANY_SYNC (CTR_FLAG_SYNC | CTR_FLAG_NOSYNC) |
| 74 | |
| 75 | /* Define flags for options without argument (e.g. 'nosync') */ |
| 76 | #define CTR_FLAG_OPTIONS_NO_ARGS CTR_FLAGS_ANY_SYNC |
| 77 | |
| 78 | /* Define flags for options with one argument (e.g. 'delta_disks +2') */ |
| 79 | #define CTR_FLAG_OPTIONS_ONE_ARG (CTR_FLAG_REBUILD | \ |
| 80 | CTR_FLAG_WRITE_MOSTLY | \ |
| 81 | CTR_FLAG_DAEMON_SLEEP | \ |
| 82 | CTR_FLAG_MIN_RECOVERY_RATE | \ |
| 83 | CTR_FLAG_MAX_RECOVERY_RATE | \ |
| 84 | CTR_FLAG_MAX_WRITE_BEHIND | \ |
| 85 | CTR_FLAG_STRIPE_CACHE | \ |
| 86 | CTR_FLAG_REGION_SIZE | \ |
| 87 | CTR_FLAG_RAID10_COPIES | \ |
| 88 | CTR_FLAG_RAID10_FORMAT) |
| 89 | |
| 90 | /* All ctr optional arguments */ |
| 91 | #define ALL_CTR_FLAGS (CTR_FLAG_OPTIONS_NO_ARGS | \ |
| 92 | CTR_FLAG_OPTIONS_ONE_ARG) |
| 93 | |
| 94 | /* Invalid options definitions per raid level... */ |
| 95 | |
| 96 | /* "raid0" does not accept any options */ |
| 97 | #define RAID0_INVALID_FLAGS ALL_CTR_FLAGS |
| 98 | |
| 99 | /* "raid1" does not accept stripe cache or any raid10 options */ |
| 100 | #define RAID1_INVALID_FLAGS (CTR_FLAG_STRIPE_CACHE | \ |
| 101 | CTR_FLAG_RAID10_COPIES | \ |
| 102 | CTR_FLAG_RAID10_FORMAT) |
| 103 | |
| 104 | /* "raid10" does not accept any raid1 or stripe cache options */ |
| 105 | #define RAID10_INVALID_FLAGS (CTR_FLAG_WRITE_MOSTLY | \ |
| 106 | CTR_FLAG_MAX_WRITE_BEHIND | \ |
| 107 | CTR_FLAG_STRIPE_CACHE) |
| 108 | /* |
| 109 | * "raid4/5/6" do not accept any raid1 or raid10 specific options |
| 110 | * |
| 111 | * "raid6" does not accept "nosync", because it is not guaranteed |
| 112 | * that both parity and q-syndrome are being written properly with |
| 113 | * any writes |
| 114 | */ |
| 115 | #define RAID45_INVALID_FLAGS (CTR_FLAG_WRITE_MOSTLY | \ |
| 116 | CTR_FLAG_MAX_WRITE_BEHIND | \ |
| 117 | CTR_FLAG_RAID10_FORMAT | \ |
| 118 | CTR_FLAG_RAID10_COPIES) |
| 119 | #define RAID6_INVALID_FLAGS (CTR_FLAG_NOSYNC | RAID45_INVALID_FLAGS) |
| 120 | /* ...invalid options definitions per raid level */ |
| 121 | |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 122 | struct raid_set { |
| 123 | struct dm_target *ti; |
| 124 | |
Jonathan Brassow | 34f8ac6d | 2012-01-27 14:53:53 -0600 | [diff] [blame] | 125 | uint32_t bitmap_loaded; |
Heinz Mauelshagen | c76d53f | 2015-04-29 14:03:00 +0200 | [diff] [blame] | 126 | uint32_t ctr_flags; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 127 | |
NeilBrown | fd01b88 | 2011-10-11 16:47:53 +1100 | [diff] [blame] | 128 | struct mddev md; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 129 | struct raid_type *raid_type; |
| 130 | struct dm_target_callbacks callbacks; |
| 131 | |
| 132 | struct raid_dev dev[0]; |
| 133 | }; |
| 134 | |
| 135 | /* Supported raid types and properties. */ |
| 136 | static struct raid_type { |
| 137 | const char *name; /* RAID algorithm. */ |
| 138 | const char *descr; /* Descriptor text for logging. */ |
| 139 | const unsigned parity_devs; /* # of parity devices. */ |
| 140 | const unsigned minimal_devs; /* minimal # of devices in set. */ |
| 141 | const unsigned level; /* RAID level. */ |
| 142 | const unsigned algorithm; /* RAID algorithm. */ |
| 143 | } raid_types[] = { |
Heinz Mauelshagen | 0cf4503 | 2015-04-29 14:03:04 +0200 | [diff] [blame] | 144 | {"raid0", "RAID0 (striping)", 0, 2, 0, 0 /* NONE */}, |
Jonathan Brassow | 3273727 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 145 | {"raid1", "RAID1 (mirroring)", 0, 2, 1, 0 /* NONE */}, |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 146 | {"raid10", "RAID10 (striped mirrors)", 0, 2, 10, UINT_MAX /* Varies */}, |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 147 | {"raid4", "RAID4 (dedicated parity disk)", 1, 2, 5, ALGORITHM_PARITY_0}, |
| 148 | {"raid5_la", "RAID5 (left asymmetric)", 1, 2, 5, ALGORITHM_LEFT_ASYMMETRIC}, |
| 149 | {"raid5_ra", "RAID5 (right asymmetric)", 1, 2, 5, ALGORITHM_RIGHT_ASYMMETRIC}, |
| 150 | {"raid5_ls", "RAID5 (left symmetric)", 1, 2, 5, ALGORITHM_LEFT_SYMMETRIC}, |
| 151 | {"raid5_rs", "RAID5 (right symmetric)", 1, 2, 5, ALGORITHM_RIGHT_SYMMETRIC}, |
| 152 | {"raid6_zr", "RAID6 (zero restart)", 2, 4, 6, ALGORITHM_ROTATING_ZERO_RESTART}, |
| 153 | {"raid6_nr", "RAID6 (N restart)", 2, 4, 6, ALGORITHM_ROTATING_N_RESTART}, |
| 154 | {"raid6_nc", "RAID6 (N continue)", 2, 4, 6, ALGORITHM_ROTATING_N_CONTINUE} |
| 155 | }; |
| 156 | |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 157 | /* True, if @v is in inclusive range [@min, @max] */ |
| 158 | static bool _in_range(long v, long min, long max) |
| 159 | { |
| 160 | return v >= min && v <= max; |
| 161 | } |
| 162 | |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 163 | /* ctr flag bit manipulation... */ |
| 164 | /* Set single @flag in @flags */ |
| 165 | static void _set_flag(uint32_t flag, uint32_t *flags) |
| 166 | { |
| 167 | WARN_ON_ONCE(hweight32(flag) != 1); |
| 168 | *flags |= flag; |
| 169 | } |
| 170 | |
| 171 | /* Test single @flag in @flags */ |
| 172 | static bool _test_flag(uint32_t flag, uint32_t flags) |
| 173 | { |
| 174 | WARN_ON_ONCE(hweight32(flag) != 1); |
| 175 | return (flag & flags) ? true : false; |
| 176 | } |
| 177 | |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 178 | /* Test multiple @flags in @all_flags */ |
| 179 | static bool _test_flags(uint32_t flags, uint32_t all_flags) |
| 180 | { |
| 181 | return (flags & all_flags) ? true : false; |
| 182 | } |
| 183 | |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 184 | /* Return true if single @flag is set in @*flags, else set it and return false */ |
| 185 | static bool _test_and_set_flag(uint32_t flag, uint32_t *flags) |
| 186 | { |
| 187 | if (_test_flag(flag, *flags)) |
| 188 | return true; |
| 189 | |
| 190 | _set_flag(flag, flags); |
| 191 | return false; |
| 192 | } |
| 193 | /* ...ctr and runtime flag bit manipulation */ |
| 194 | |
| 195 | /* All table line arguments are defined here */ |
| 196 | static struct arg_name_flag { |
| 197 | const uint32_t flag; |
| 198 | const char *name; |
| 199 | } _arg_name_flags[] = { |
| 200 | { CTR_FLAG_SYNC, "sync"}, |
| 201 | { CTR_FLAG_NOSYNC, "nosync"}, |
| 202 | { CTR_FLAG_REBUILD, "rebuild"}, |
| 203 | { CTR_FLAG_DAEMON_SLEEP, "daemon_sleep"}, |
| 204 | { CTR_FLAG_MIN_RECOVERY_RATE, "min_recovery_rate"}, |
| 205 | { CTR_FLAG_MAX_RECOVERY_RATE, "max_recovery_rate"}, |
| 206 | { CTR_FLAG_MAX_WRITE_BEHIND, "max_write_behind"}, |
| 207 | { CTR_FLAG_WRITE_MOSTLY, "writemostly"}, |
| 208 | { CTR_FLAG_STRIPE_CACHE, "stripe_cache"}, |
| 209 | { CTR_FLAG_REGION_SIZE, "region_size"}, |
| 210 | { CTR_FLAG_RAID10_COPIES, "raid10_copies"}, |
| 211 | { CTR_FLAG_RAID10_FORMAT, "raid10_format"}, |
| 212 | }; |
| 213 | |
| 214 | /* Return argument name string for given @flag */ |
| 215 | static const char *_argname_by_flag(const uint32_t flag) |
| 216 | { |
| 217 | if (hweight32(flag) == 1) { |
| 218 | struct arg_name_flag *anf = _arg_name_flags + ARRAY_SIZE(_arg_name_flags); |
| 219 | |
| 220 | while (anf-- > _arg_name_flags) |
| 221 | if (_test_flag(flag, anf->flag)) |
| 222 | return anf->name; |
| 223 | |
| 224 | } else |
| 225 | DMERR("%s called with more than one flag!", __func__); |
| 226 | |
| 227 | return NULL; |
| 228 | } |
| 229 | |
| 230 | /* |
Heinz Mauelshagen | f090279 | 2016-05-19 18:49:27 +0200 | [diff] [blame] | 231 | * bool helpers to test for various raid levels of a raid type |
| 232 | */ |
| 233 | |
| 234 | /* Return true, if raid type in @rt is raid0 */ |
| 235 | static bool rt_is_raid0(struct raid_type *rt) |
| 236 | { |
| 237 | return !rt->level; |
| 238 | } |
| 239 | |
| 240 | /* Return true, if raid type in @rt is raid1 */ |
| 241 | static bool rt_is_raid1(struct raid_type *rt) |
| 242 | { |
| 243 | return rt->level == 1; |
| 244 | } |
| 245 | |
| 246 | /* Return true, if raid type in @rt is raid10 */ |
| 247 | static bool rt_is_raid10(struct raid_type *rt) |
| 248 | { |
| 249 | return rt->level == 10; |
| 250 | } |
| 251 | |
| 252 | /* Return true, if raid type in @rt is raid4/5 */ |
| 253 | static bool rt_is_raid45(struct raid_type *rt) |
| 254 | { |
| 255 | return _in_range(rt->level, 4, 5); |
| 256 | } |
| 257 | |
| 258 | /* Return true, if raid type in @rt is raid6 */ |
| 259 | static bool rt_is_raid6(struct raid_type *rt) |
| 260 | { |
| 261 | return rt->level == 6; |
| 262 | } |
Heinz Mauelshagen | 676fa5a | 2016-05-19 18:49:29 +0200 | [diff] [blame^] | 263 | |
| 264 | /* Return true, if raid type in @rt is raid4/5/6 */ |
| 265 | static bool rt_is_raid456(struct raid_type *rt) |
| 266 | { |
| 267 | return _in_range(rt->level, 4, 6); |
| 268 | } |
Heinz Mauelshagen | f090279 | 2016-05-19 18:49:27 +0200 | [diff] [blame] | 269 | /* END: raid level bools */ |
| 270 | |
| 271 | /* |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 272 | * Convenience functions to set ti->error to @errmsg and |
| 273 | * return @r in order to shorten code in a lot of places |
| 274 | */ |
| 275 | static int ti_error_ret(struct dm_target *ti, const char *errmsg, int r) |
| 276 | { |
| 277 | ti->error = (char *) errmsg; |
| 278 | return r; |
| 279 | } |
| 280 | |
| 281 | static int ti_error_einval(struct dm_target *ti, const char *errmsg) |
| 282 | { |
| 283 | return ti_error_ret(ti, errmsg, -EINVAL); |
| 284 | } |
| 285 | /* END: convenience functions to set ti->error to @errmsg... */ |
| 286 | |
Heinz Mauelshagen | f090279 | 2016-05-19 18:49:27 +0200 | [diff] [blame] | 287 | /* Return invalid ctr flags for the raid level of @rs */ |
| 288 | static uint32_t _invalid_flags(struct raid_set *rs) |
| 289 | { |
| 290 | if (rt_is_raid0(rs->raid_type)) |
| 291 | return RAID0_INVALID_FLAGS; |
| 292 | else if (rt_is_raid1(rs->raid_type)) |
| 293 | return RAID1_INVALID_FLAGS; |
| 294 | else if (rt_is_raid10(rs->raid_type)) |
| 295 | return RAID10_INVALID_FLAGS; |
| 296 | else if (rt_is_raid45(rs->raid_type)) |
| 297 | return RAID45_INVALID_FLAGS; |
| 298 | else if (rt_is_raid6(rs->raid_type)) |
| 299 | return RAID6_INVALID_FLAGS; |
| 300 | |
| 301 | return ~0; |
| 302 | } |
| 303 | |
| 304 | /* |
| 305 | * Check for any invalid flags set on @rs defined by bitset @invalid_flags |
| 306 | * |
| 307 | * Has to be called after parsing of the ctr flags! |
| 308 | */ |
| 309 | static int rs_check_for_invalid_flags(struct raid_set *rs) |
| 310 | { |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 311 | if (_test_flags(rs->ctr_flags, _invalid_flags(rs))) |
| 312 | return ti_error_einval(rs->ti, "Invalid flag combined"); |
Heinz Mauelshagen | f090279 | 2016-05-19 18:49:27 +0200 | [diff] [blame] | 313 | |
| 314 | return 0; |
| 315 | } |
| 316 | |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 317 | static char *raid10_md_layout_to_format(int layout) |
| 318 | { |
| 319 | /* |
| 320 | * Bit 16 and 17 stand for "offset" and "use_far_sets" |
| 321 | * Refer to MD's raid10.c for details |
| 322 | */ |
| 323 | if ((layout & 0x10000) && (layout & 0x20000)) |
| 324 | return "offset"; |
| 325 | |
| 326 | if ((layout & 0xFF) > 1) |
| 327 | return "near"; |
| 328 | |
| 329 | return "far"; |
| 330 | } |
| 331 | |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 332 | static unsigned raid10_md_layout_to_copies(int layout) |
| 333 | { |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 334 | if ((layout & 0xFF) > 1) |
| 335 | return layout & 0xFF; |
| 336 | return (layout >> 8) & 0xFF; |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 337 | } |
| 338 | |
| 339 | static int raid10_format_to_md_layout(char *format, unsigned copies) |
| 340 | { |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 341 | unsigned n = 1, f = 1; |
| 342 | |
Heinz Mauelshagen | c76d53f | 2015-04-29 14:03:00 +0200 | [diff] [blame] | 343 | if (!strcasecmp("near", format)) |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 344 | n = copies; |
| 345 | else |
| 346 | f = copies; |
| 347 | |
Heinz Mauelshagen | c76d53f | 2015-04-29 14:03:00 +0200 | [diff] [blame] | 348 | if (!strcasecmp("offset", format)) |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 349 | return 0x30000 | (f << 8) | n; |
| 350 | |
Heinz Mauelshagen | c76d53f | 2015-04-29 14:03:00 +0200 | [diff] [blame] | 351 | if (!strcasecmp("far", format)) |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 352 | return 0x20000 | (f << 8) | n; |
| 353 | |
| 354 | return (f << 8) | n; |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 355 | } |
| 356 | |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 357 | static struct raid_type *get_raid_type(const char *name) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 358 | { |
| 359 | int i; |
| 360 | |
| 361 | for (i = 0; i < ARRAY_SIZE(raid_types); i++) |
| 362 | if (!strcmp(raid_types[i].name, name)) |
| 363 | return &raid_types[i]; |
| 364 | |
| 365 | return NULL; |
| 366 | } |
| 367 | |
| 368 | static struct raid_set *context_alloc(struct dm_target *ti, struct raid_type *raid_type, unsigned raid_devs) |
| 369 | { |
| 370 | unsigned i; |
| 371 | struct raid_set *rs; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 372 | |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 373 | if (raid_devs <= raid_type->parity_devs) |
| 374 | return ERR_PTR(ti_error_einval(ti, "Insufficient number of devices")); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 375 | |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 376 | rs = kzalloc(sizeof(*rs) + raid_devs * sizeof(rs->dev[0]), GFP_KERNEL); |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 377 | if (!rs) |
| 378 | return ERR_PTR(ti_error_ret(ti, "Cannot allocate raid context", -ENOMEM)); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 379 | |
| 380 | mddev_init(&rs->md); |
| 381 | |
| 382 | rs->ti = ti; |
| 383 | rs->raid_type = raid_type; |
| 384 | rs->md.raid_disks = raid_devs; |
| 385 | rs->md.level = raid_type->level; |
| 386 | rs->md.new_level = rs->md.level; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 387 | rs->md.layout = raid_type->algorithm; |
| 388 | rs->md.new_layout = rs->md.layout; |
| 389 | rs->md.delta_disks = 0; |
| 390 | rs->md.recovery_cp = 0; |
| 391 | |
| 392 | for (i = 0; i < raid_devs; i++) |
| 393 | md_rdev_init(&rs->dev[i].rdev); |
| 394 | |
| 395 | /* |
| 396 | * Remaining items to be initialized by further RAID params: |
| 397 | * rs->md.persistent |
| 398 | * rs->md.external |
| 399 | * rs->md.chunk_sectors |
| 400 | * rs->md.new_chunk_sectors |
Jonathan E Brassow | c039c33 | 2012-07-27 15:08:04 +0100 | [diff] [blame] | 401 | * rs->md.dev_sectors |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 402 | */ |
| 403 | |
| 404 | return rs; |
| 405 | } |
| 406 | |
| 407 | static void context_free(struct raid_set *rs) |
| 408 | { |
| 409 | int i; |
| 410 | |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 411 | for (i = 0; i < rs->md.raid_disks; i++) { |
| 412 | if (rs->dev[i].meta_dev) |
| 413 | dm_put_device(rs->ti, rs->dev[i].meta_dev); |
NeilBrown | 545c879 | 2012-05-22 13:54:30 +1000 | [diff] [blame] | 414 | md_rdev_clear(&rs->dev[i].rdev); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 415 | if (rs->dev[i].data_dev) |
| 416 | dm_put_device(rs->ti, rs->dev[i].data_dev); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 417 | } |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 418 | |
| 419 | kfree(rs); |
| 420 | } |
| 421 | |
| 422 | /* |
| 423 | * For every device we have two words |
| 424 | * <meta_dev>: meta device name or '-' if missing |
| 425 | * <data_dev>: data device name or '-' if missing |
| 426 | * |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 427 | * The following are permitted: |
| 428 | * - - |
| 429 | * - <data_dev> |
| 430 | * <meta_dev> <data_dev> |
| 431 | * |
| 432 | * The following is not allowed: |
| 433 | * <meta_dev> - |
| 434 | * |
| 435 | * This code parses those words. If there is a failure, |
| 436 | * the caller must use context_free to unwind the operations. |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 437 | */ |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 438 | static int parse_dev_params(struct raid_set *rs, struct dm_arg_set *as) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 439 | { |
| 440 | int i; |
| 441 | int rebuild = 0; |
| 442 | int metadata_available = 0; |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 443 | int r = 0; |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 444 | const char *arg; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 445 | |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 446 | /* Put off the number of raid devices argument to get to dev pairs */ |
| 447 | arg = dm_shift_arg(as); |
| 448 | if (!arg) |
| 449 | return -EINVAL; |
| 450 | |
| 451 | for (i = 0; i < rs->md.raid_disks; i++) { |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 452 | rs->dev[i].rdev.raid_disk = i; |
| 453 | |
| 454 | rs->dev[i].meta_dev = NULL; |
| 455 | rs->dev[i].data_dev = NULL; |
| 456 | |
| 457 | /* |
| 458 | * There are no offsets, since there is a separate device |
| 459 | * for data and metadata. |
| 460 | */ |
| 461 | rs->dev[i].rdev.data_offset = 0; |
| 462 | rs->dev[i].rdev.mddev = &rs->md; |
| 463 | |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 464 | arg = dm_shift_arg(as); |
| 465 | if (!arg) |
| 466 | return -EINVAL; |
| 467 | |
| 468 | if (strcmp(arg, "-")) { |
| 469 | r = dm_get_device(rs->ti, arg, |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 470 | dm_table_get_mode(rs->ti->table), |
| 471 | &rs->dev[i].meta_dev); |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 472 | if (r) |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 473 | return ti_error_ret(rs->ti, "RAID metadata device lookup failure", r); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 474 | |
| 475 | rs->dev[i].rdev.sb_page = alloc_page(GFP_KERNEL); |
| 476 | if (!rs->dev[i].rdev.sb_page) |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 477 | return ti_error_ret(rs->ti, "Failed to allocate superblock page", -ENOMEM); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 478 | } |
| 479 | |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 480 | arg = dm_shift_arg(as); |
| 481 | if (!arg) |
| 482 | return -EINVAL; |
| 483 | |
| 484 | if (!strcmp(arg, "-")) { |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 485 | if (!test_bit(In_sync, &rs->dev[i].rdev.flags) && |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 486 | (!rs->dev[i].rdev.recovery_offset)) |
| 487 | return ti_error_einval(rs->ti, "Drive designated for rebuild not specified"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 488 | |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 489 | if (rs->dev[i].meta_dev) |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 490 | return ti_error_einval(rs->ti, "No data device supplied with metadata device"); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 491 | |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 492 | continue; |
| 493 | } |
| 494 | |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 495 | r = dm_get_device(rs->ti, arg, |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 496 | dm_table_get_mode(rs->ti->table), |
| 497 | &rs->dev[i].data_dev); |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 498 | if (r) |
| 499 | return ti_error_ret(rs->ti, "RAID device lookup failure", r); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 500 | |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 501 | if (rs->dev[i].meta_dev) { |
| 502 | metadata_available = 1; |
| 503 | rs->dev[i].rdev.meta_bdev = rs->dev[i].meta_dev->bdev; |
| 504 | } |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 505 | rs->dev[i].rdev.bdev = rs->dev[i].data_dev->bdev; |
| 506 | list_add(&rs->dev[i].rdev.same_set, &rs->md.disks); |
| 507 | if (!test_bit(In_sync, &rs->dev[i].rdev.flags)) |
| 508 | rebuild++; |
| 509 | } |
| 510 | |
| 511 | if (metadata_available) { |
| 512 | rs->md.external = 0; |
| 513 | rs->md.persistent = 1; |
| 514 | rs->md.major_version = 2; |
| 515 | } else if (rebuild && !rs->md.recovery_cp) { |
| 516 | /* |
| 517 | * Without metadata, we will not be able to tell if the array |
| 518 | * is in-sync or not - we must assume it is not. Therefore, |
| 519 | * it is impossible to rebuild a drive. |
| 520 | * |
| 521 | * Even if there is metadata, the on-disk information may |
| 522 | * indicate that the array is not in-sync and it will then |
| 523 | * fail at that time. |
| 524 | * |
| 525 | * User could specify 'nosync' option if desperate. |
| 526 | */ |
| 527 | DMERR("Unable to rebuild drive while array is not in-sync"); |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 528 | return ti_error_einval(rs->ti, "Unable to rebuild drive while array is not in-sync"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 529 | } |
| 530 | |
| 531 | return 0; |
| 532 | } |
| 533 | |
| 534 | /* |
Jonathan Brassow | c108456 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 535 | * validate_region_size |
| 536 | * @rs |
| 537 | * @region_size: region size in sectors. If 0, pick a size (4MiB default). |
| 538 | * |
| 539 | * Set rs->md.bitmap_info.chunksize (which really refers to 'region size'). |
| 540 | * Ensure that (ti->len/region_size < 2^21) - required by MD bitmap. |
| 541 | * |
| 542 | * Returns: 0 on success, -EINVAL on failure. |
| 543 | */ |
| 544 | static int validate_region_size(struct raid_set *rs, unsigned long region_size) |
| 545 | { |
| 546 | unsigned long min_region_size = rs->ti->len / (1 << 21); |
| 547 | |
| 548 | if (!region_size) { |
| 549 | /* |
| 550 | * Choose a reasonable default. All figures in sectors. |
| 551 | */ |
| 552 | if (min_region_size > (1 << 13)) { |
Jonathan Brassow | 3a0f9aa | 2012-12-21 20:23:33 +0000 | [diff] [blame] | 553 | /* If not a power of 2, make it the next power of 2 */ |
Mikulas Patocka | 042745e | 2015-10-02 11:17:37 -0400 | [diff] [blame] | 554 | region_size = roundup_pow_of_two(min_region_size); |
Jonathan Brassow | c108456 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 555 | DMINFO("Choosing default region size of %lu sectors", |
| 556 | region_size); |
Jonathan Brassow | c108456 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 557 | } else { |
| 558 | DMINFO("Choosing default region size of 4MiB"); |
| 559 | region_size = 1 << 13; /* sectors */ |
| 560 | } |
| 561 | } else { |
| 562 | /* |
| 563 | * Validate user-supplied value. |
| 564 | */ |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 565 | if (region_size > rs->ti->len) |
| 566 | return ti_error_einval(rs->ti, "Supplied region size is too large"); |
Jonathan Brassow | c108456 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 567 | |
| 568 | if (region_size < min_region_size) { |
| 569 | DMERR("Supplied region_size (%lu sectors) below minimum (%lu)", |
| 570 | region_size, min_region_size); |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 571 | return ti_error_einval(rs->ti, "Supplied region size is too small"); |
Jonathan Brassow | c108456 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 572 | } |
| 573 | |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 574 | if (!is_power_of_2(region_size)) |
| 575 | return ti_error_einval(rs->ti, "Region size is not a power of 2"); |
Jonathan Brassow | c108456 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 576 | |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 577 | if (region_size < rs->md.chunk_sectors) |
| 578 | return ti_error_einval(rs->ti, "Region size is smaller than the chunk size"); |
Jonathan Brassow | c108456 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 579 | } |
| 580 | |
| 581 | /* |
| 582 | * Convert sectors to bytes. |
| 583 | */ |
| 584 | rs->md.bitmap_info.chunksize = (region_size << 9); |
| 585 | |
| 586 | return 0; |
| 587 | } |
| 588 | |
| 589 | /* |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 590 | * validate_raid_redundancy |
Jonathan Brassow | eb64912 | 2012-10-11 13:40:09 +1100 | [diff] [blame] | 591 | * @rs |
| 592 | * |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 593 | * Determine if there are enough devices in the array that haven't |
| 594 | * failed (or are being rebuilt) to form a usable array. |
Jonathan Brassow | eb64912 | 2012-10-11 13:40:09 +1100 | [diff] [blame] | 595 | * |
| 596 | * Returns: 0 on success, -EINVAL on failure. |
| 597 | */ |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 598 | static int validate_raid_redundancy(struct raid_set *rs) |
Jonathan Brassow | eb64912 | 2012-10-11 13:40:09 +1100 | [diff] [blame] | 599 | { |
| 600 | unsigned i, rebuild_cnt = 0; |
NeilBrown | 3f6bbd3 | 2013-05-09 10:27:49 +1000 | [diff] [blame] | 601 | unsigned rebuilds_per_group = 0, copies, d; |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 602 | unsigned group_size, last_group_start; |
Jonathan Brassow | eb64912 | 2012-10-11 13:40:09 +1100 | [diff] [blame] | 603 | |
Jonathan Brassow | eb64912 | 2012-10-11 13:40:09 +1100 | [diff] [blame] | 604 | for (i = 0; i < rs->md.raid_disks; i++) |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 605 | if (!test_bit(In_sync, &rs->dev[i].rdev.flags) || |
| 606 | !rs->dev[i].rdev.sb_page) |
Jonathan Brassow | eb64912 | 2012-10-11 13:40:09 +1100 | [diff] [blame] | 607 | rebuild_cnt++; |
| 608 | |
| 609 | switch (rs->raid_type->level) { |
| 610 | case 1: |
| 611 | if (rebuild_cnt >= rs->md.raid_disks) |
| 612 | goto too_many; |
| 613 | break; |
| 614 | case 4: |
| 615 | case 5: |
| 616 | case 6: |
| 617 | if (rebuild_cnt > rs->raid_type->parity_devs) |
| 618 | goto too_many; |
| 619 | break; |
| 620 | case 10: |
Jonathan Brassow | 4ec1e36 | 2012-10-11 13:40:24 +1100 | [diff] [blame] | 621 | copies = raid10_md_layout_to_copies(rs->md.layout); |
| 622 | if (rebuild_cnt < copies) |
| 623 | break; |
| 624 | |
| 625 | /* |
| 626 | * It is possible to have a higher rebuild count for RAID10, |
| 627 | * as long as the failed devices occur in different mirror |
| 628 | * groups (i.e. different stripes). |
| 629 | * |
Jonathan Brassow | 4ec1e36 | 2012-10-11 13:40:24 +1100 | [diff] [blame] | 630 | * When checking "near" format, make sure no adjacent devices |
| 631 | * have failed beyond what can be handled. In addition to the |
| 632 | * simple case where the number of devices is a multiple of the |
| 633 | * number of copies, we must also handle cases where the number |
| 634 | * of devices is not a multiple of the number of copies. |
| 635 | * E.g. dev1 dev2 dev3 dev4 dev5 |
| 636 | * A A B B C |
| 637 | * C D D E E |
| 638 | */ |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 639 | if (!strcmp("near", raid10_md_layout_to_format(rs->md.layout))) { |
| 640 | for (i = 0; i < rs->md.raid_disks * copies; i++) { |
| 641 | if (!(i % copies)) |
| 642 | rebuilds_per_group = 0; |
| 643 | d = i % rs->md.raid_disks; |
| 644 | if ((!rs->dev[d].rdev.sb_page || |
| 645 | !test_bit(In_sync, &rs->dev[d].rdev.flags)) && |
| 646 | (++rebuilds_per_group >= copies)) |
| 647 | goto too_many; |
| 648 | } |
| 649 | break; |
| 650 | } |
| 651 | |
| 652 | /* |
| 653 | * When checking "far" and "offset" formats, we need to ensure |
| 654 | * that the device that holds its copy is not also dead or |
| 655 | * being rebuilt. (Note that "far" and "offset" formats only |
| 656 | * support two copies right now. These formats also only ever |
| 657 | * use the 'use_far_sets' variant.) |
| 658 | * |
| 659 | * This check is somewhat complicated by the need to account |
| 660 | * for arrays that are not a multiple of (far) copies. This |
| 661 | * results in the need to treat the last (potentially larger) |
| 662 | * set differently. |
| 663 | */ |
| 664 | group_size = (rs->md.raid_disks / copies); |
| 665 | last_group_start = (rs->md.raid_disks / group_size) - 1; |
| 666 | last_group_start *= group_size; |
| 667 | for (i = 0; i < rs->md.raid_disks; i++) { |
| 668 | if (!(i % copies) && !(i > last_group_start)) |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 669 | rebuilds_per_group = 0; |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 670 | if ((!rs->dev[i].rdev.sb_page || |
| 671 | !test_bit(In_sync, &rs->dev[i].rdev.flags)) && |
Jonathan Brassow | 4ec1e36 | 2012-10-11 13:40:24 +1100 | [diff] [blame] | 672 | (++rebuilds_per_group >= copies)) |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 673 | goto too_many; |
Jonathan Brassow | 4ec1e36 | 2012-10-11 13:40:24 +1100 | [diff] [blame] | 674 | } |
| 675 | break; |
Jonathan Brassow | eb64912 | 2012-10-11 13:40:09 +1100 | [diff] [blame] | 676 | default: |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 677 | if (rebuild_cnt) |
| 678 | return -EINVAL; |
Jonathan Brassow | eb64912 | 2012-10-11 13:40:09 +1100 | [diff] [blame] | 679 | } |
| 680 | |
| 681 | return 0; |
| 682 | |
| 683 | too_many: |
Jonathan Brassow | eb64912 | 2012-10-11 13:40:09 +1100 | [diff] [blame] | 684 | return -EINVAL; |
| 685 | } |
| 686 | |
| 687 | /* |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 688 | * Possible arguments are... |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 689 | * <chunk_size> [optional_args] |
| 690 | * |
Jonathan Brassow | 3273727 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 691 | * Argument definitions |
| 692 | * <chunk_size> The number of sectors per disk that |
| 693 | * will form the "stripe" |
| 694 | * [[no]sync] Force or prevent recovery of the |
| 695 | * entire array |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 696 | * [rebuild <idx>] Rebuild the drive indicated by the index |
Jonathan Brassow | 3273727 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 697 | * [daemon_sleep <ms>] Time between bitmap daemon work to |
| 698 | * clear bits |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 699 | * [min_recovery_rate <kB/sec/disk>] Throttle RAID initialization |
| 700 | * [max_recovery_rate <kB/sec/disk>] Throttle RAID initialization |
Jonathan Brassow | 46bed2b | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 701 | * [write_mostly <idx>] Indicate a write mostly drive via index |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 702 | * [max_write_behind <sectors>] See '-write-behind=' (man mdadm) |
| 703 | * [stripe_cache <sectors>] Stripe cache size for higher RAIDs |
Jonathan Brassow | c108456 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 704 | * [region_size <sectors>] Defines granularity of bitmap |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 705 | * |
| 706 | * RAID10-only options: |
| 707 | * [raid10_copies <# copies>] Number of copies. (Default: 2) |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 708 | * [raid10_format <near|far|offset>] Layout algorithm. (Default: near) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 709 | */ |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 710 | static int parse_raid_params(struct raid_set *rs, struct dm_arg_set *as, |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 711 | unsigned num_raid_params) |
| 712 | { |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 713 | char *raid10_format = "near"; |
| 714 | unsigned raid10_copies = 2; |
Jonathan Brassow | eb64912 | 2012-10-11 13:40:09 +1100 | [diff] [blame] | 715 | unsigned i; |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 716 | unsigned value, region_size = 0; |
Jonathan E Brassow | c039c33 | 2012-07-27 15:08:04 +0100 | [diff] [blame] | 717 | sector_t sectors_per_dev = rs->ti->len; |
Mike Snitzer | 542f903 | 2012-07-27 15:08:00 +0100 | [diff] [blame] | 718 | sector_t max_io_len; |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 719 | const char *arg, *key; |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 720 | struct raid_dev *rd; |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 721 | |
| 722 | arg = dm_shift_arg(as); |
| 723 | num_raid_params--; /* Account for chunk_size argument */ |
| 724 | |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 725 | if (kstrtouint(arg, 10, &value) < 0) |
| 726 | return ti_error_einval(rs->ti, "Bad numerical argument given for chunk_size"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 727 | |
| 728 | /* |
| 729 | * First, parse the in-order required arguments |
Jonathan Brassow | 3273727 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 730 | * "chunk_size" is the only argument of this type. |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 731 | */ |
Heinz Mauelshagen | 676fa5a | 2016-05-19 18:49:29 +0200 | [diff] [blame^] | 732 | if (rt_is_raid1(rs->raid_type)) { |
Jonathan Brassow | 3273727 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 733 | if (value) |
| 734 | DMERR("Ignoring chunk size parameter for RAID 1"); |
| 735 | value = 0; |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 736 | } else if (!is_power_of_2(value)) |
| 737 | return ti_error_einval(rs->ti, "Chunk size must be a power of 2"); |
| 738 | else if (value < 8) |
| 739 | return ti_error_einval(rs->ti, "Chunk size value is too small"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 740 | |
| 741 | rs->md.new_chunk_sectors = rs->md.chunk_sectors = value; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 742 | |
| 743 | /* |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 744 | * We set each individual device as In_sync with a completed |
| 745 | * 'recovery_offset'. If there has been a device failure or |
| 746 | * replacement then one of the following cases applies: |
| 747 | * |
| 748 | * 1) User specifies 'rebuild'. |
| 749 | * - Device is reset when param is read. |
| 750 | * 2) A new device is supplied. |
| 751 | * - No matching superblock found, resets device. |
| 752 | * 3) Device failure was transient and returns on reload. |
| 753 | * - Failure noticed, resets device for bitmap replay. |
| 754 | * 4) Device hadn't completed recovery after previous failure. |
| 755 | * - Superblock is read and overrides recovery_offset. |
| 756 | * |
| 757 | * What is found in the superblocks of the devices is always |
| 758 | * authoritative, unless 'rebuild' or '[no]sync' was specified. |
| 759 | */ |
| 760 | for (i = 0; i < rs->md.raid_disks; i++) { |
| 761 | set_bit(In_sync, &rs->dev[i].rdev.flags); |
| 762 | rs->dev[i].rdev.recovery_offset = MaxSector; |
| 763 | } |
| 764 | |
| 765 | /* |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 766 | * Second, parse the unordered optional arguments |
| 767 | */ |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 768 | for (i = 0; i < num_raid_params; i++) { |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 769 | arg = dm_shift_arg(as); |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 770 | if (!arg) |
| 771 | return ti_error_einval(rs->ti, "Not enough raid parameters given"); |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 772 | |
| 773 | if (!strcasecmp(arg, "nosync")) { |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 774 | rs->md.recovery_cp = MaxSector; |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 775 | _set_flag(CTR_FLAG_NOSYNC, &rs->ctr_flags); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 776 | continue; |
| 777 | } |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 778 | if (!strcasecmp(arg, "sync")) { |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 779 | rs->md.recovery_cp = 0; |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 780 | _set_flag(CTR_FLAG_SYNC, &rs->ctr_flags); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 781 | continue; |
| 782 | } |
| 783 | |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 784 | key = arg; |
| 785 | arg = dm_shift_arg(as); |
| 786 | i++; /* Account for the argument pairs */ |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 787 | if (!arg) |
| 788 | return ti_error_einval(rs->ti, "Wrong number of raid parameters given"); |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 789 | |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 790 | /* |
| 791 | * Parameters that take a string value are checked here. |
| 792 | */ |
| 793 | |
| 794 | if (!strcasecmp(key, _argname_by_flag(CTR_FLAG_RAID10_FORMAT))) { |
| 795 | if (_test_and_set_flag(CTR_FLAG_RAID10_FORMAT, &rs->ctr_flags)) |
| 796 | return ti_error_einval(rs->ti, "Only one raid10_format argument pair allowed"); |
Heinz Mauelshagen | 676fa5a | 2016-05-19 18:49:29 +0200 | [diff] [blame^] | 797 | if (!rt_is_raid10(rs->raid_type)) |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 798 | return ti_error_einval(rs->ti, "'raid10_format' is an invalid parameter for this RAID type"); |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 799 | if (strcmp("near", arg) && |
| 800 | strcmp("far", arg) && |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 801 | strcmp("offset", arg)) |
| 802 | return ti_error_einval(rs->ti, "Invalid 'raid10_format' value given"); |
| 803 | |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 804 | raid10_format = (char *) arg; |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 805 | continue; |
| 806 | } |
| 807 | |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 808 | if (kstrtouint(arg, 10, &value) < 0) |
| 809 | return ti_error_einval(rs->ti, "Bad numerical argument given in raid params"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 810 | |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 811 | if (!strcasecmp(key, _argname_by_flag(CTR_FLAG_REBUILD))) { |
| 812 | /* |
| 813 | * "rebuild" is being passed in by userspace to provide |
| 814 | * indexes of replaced devices and to set up additional |
| 815 | * devices on raid level takeover. |
| 816 | */ |
| 817 | if (!_in_range(value, 0, rs->md.raid_disks - 1)) |
| 818 | return ti_error_einval(rs->ti, "Invalid rebuild index given"); |
| 819 | |
| 820 | rd = rs->dev + value; |
| 821 | clear_bit(In_sync, &rd->rdev.flags); |
| 822 | clear_bit(Faulty, &rd->rdev.flags); |
| 823 | rd->rdev.recovery_offset = 0; |
| 824 | _set_flag(CTR_FLAG_REBUILD, &rs->ctr_flags); |
| 825 | } else if (!strcasecmp(key, _argname_by_flag(CTR_FLAG_WRITE_MOSTLY))) { |
Heinz Mauelshagen | 676fa5a | 2016-05-19 18:49:29 +0200 | [diff] [blame^] | 826 | if (!rt_is_raid1(rs->raid_type)) |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 827 | return ti_error_einval(rs->ti, "write_mostly option is only valid for RAID1"); |
| 828 | |
| 829 | if (!_in_range(value, 0, rs->md.raid_disks - 1)) |
| 830 | return ti_error_einval(rs->ti, "Invalid write_mostly index given"); |
| 831 | |
Jonathan Brassow | 46bed2b | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 832 | set_bit(WriteMostly, &rs->dev[value].rdev.flags); |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 833 | _set_flag(CTR_FLAG_WRITE_MOSTLY, &rs->ctr_flags); |
| 834 | } else if (!strcasecmp(key, _argname_by_flag(CTR_FLAG_MAX_WRITE_BEHIND))) { |
Heinz Mauelshagen | 676fa5a | 2016-05-19 18:49:29 +0200 | [diff] [blame^] | 835 | if (!rt_is_raid1(rs->raid_type)) |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 836 | return ti_error_einval(rs->ti, "max_write_behind option is only valid for RAID1"); |
| 837 | |
| 838 | if (_test_and_set_flag(CTR_FLAG_MAX_WRITE_BEHIND, &rs->ctr_flags)) |
| 839 | return ti_error_einval(rs->ti, "Only one max_write_behind argument pair allowed"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 840 | |
| 841 | /* |
| 842 | * In device-mapper, we specify things in sectors, but |
| 843 | * MD records this value in kB |
| 844 | */ |
| 845 | value /= 2; |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 846 | if (value > COUNTER_MAX) |
| 847 | return ti_error_einval(rs->ti, "Max write-behind limit out of range"); |
| 848 | |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 849 | rs->md.bitmap_info.max_write_behind = value; |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 850 | } else if (!strcasecmp(key, _argname_by_flag(CTR_FLAG_DAEMON_SLEEP))) { |
| 851 | if (_test_and_set_flag(CTR_FLAG_DAEMON_SLEEP, &rs->ctr_flags)) |
| 852 | return ti_error_einval(rs->ti, "Only one daemon_sleep argument pair allowed"); |
| 853 | if (!value || (value > MAX_SCHEDULE_TIMEOUT)) |
| 854 | return ti_error_einval(rs->ti, "daemon sleep period out of range"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 855 | rs->md.bitmap_info.daemon_sleep = value; |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 856 | } else if (!strcasecmp(key, _argname_by_flag(CTR_FLAG_STRIPE_CACHE))) { |
| 857 | if (_test_and_set_flag(CTR_FLAG_STRIPE_CACHE, &rs->ctr_flags)) |
| 858 | return ti_error_einval(rs->ti, "Only one stripe_cache argument pair allowed"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 859 | /* |
| 860 | * In device-mapper, we specify things in sectors, but |
| 861 | * MD records this value in kB |
| 862 | */ |
| 863 | value /= 2; |
| 864 | |
Heinz Mauelshagen | 676fa5a | 2016-05-19 18:49:29 +0200 | [diff] [blame^] | 865 | if (!rt_is_raid456(rs->raid_type)) |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 866 | return ti_error_einval(rs->ti, "Inappropriate argument: stripe_cache"); |
| 867 | if (raid5_set_cache_size(&rs->md, (int)value)) |
| 868 | return ti_error_einval(rs->ti, "Bad stripe_cache size"); |
| 869 | |
| 870 | } else if (!strcasecmp(key, _argname_by_flag(CTR_FLAG_MIN_RECOVERY_RATE))) { |
| 871 | if (_test_and_set_flag(CTR_FLAG_MIN_RECOVERY_RATE, &rs->ctr_flags)) |
| 872 | return ti_error_einval(rs->ti, "Only one min_recovery_rate argument pair allowed"); |
| 873 | if (value > INT_MAX) |
| 874 | return ti_error_einval(rs->ti, "min_recovery_rate out of range"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 875 | rs->md.sync_speed_min = (int)value; |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 876 | } else if (!strcasecmp(key, _argname_by_flag(CTR_FLAG_MAX_RECOVERY_RATE))) { |
| 877 | if (_test_and_set_flag(CTR_FLAG_MIN_RECOVERY_RATE, &rs->ctr_flags)) |
| 878 | return ti_error_einval(rs->ti, "Only one max_recovery_rate argument pair allowed"); |
| 879 | if (value > INT_MAX) |
| 880 | return ti_error_einval(rs->ti, "max_recovery_rate out of range"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 881 | rs->md.sync_speed_max = (int)value; |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 882 | } else if (!strcasecmp(key, _argname_by_flag(CTR_FLAG_REGION_SIZE))) { |
| 883 | if (_test_and_set_flag(CTR_FLAG_REGION_SIZE, &rs->ctr_flags)) |
| 884 | return ti_error_einval(rs->ti, "Only one region_size argument pair allowed"); |
| 885 | |
Jonathan Brassow | c108456 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 886 | region_size = value; |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 887 | } else if (!strcasecmp(key, _argname_by_flag(CTR_FLAG_RAID10_COPIES))) { |
| 888 | if (_test_and_set_flag(CTR_FLAG_RAID10_COPIES, &rs->ctr_flags)) |
| 889 | return ti_error_einval(rs->ti, "Only one raid10_copies argument pair allowed"); |
| 890 | |
| 891 | if (!_in_range(value, 2, rs->md.raid_disks)) |
| 892 | return ti_error_einval(rs->ti, "Bad value for 'raid10_copies'"); |
| 893 | |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 894 | raid10_copies = value; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 895 | } else { |
| 896 | DMERR("Unable to parse RAID parameter: %s", key); |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 897 | return ti_error_einval(rs->ti, "Unable to parse RAID parameters"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 898 | } |
| 899 | } |
| 900 | |
Jonathan Brassow | c108456 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 901 | if (validate_region_size(rs, region_size)) |
| 902 | return -EINVAL; |
| 903 | |
| 904 | if (rs->md.chunk_sectors) |
Mike Snitzer | 542f903 | 2012-07-27 15:08:00 +0100 | [diff] [blame] | 905 | max_io_len = rs->md.chunk_sectors; |
Jonathan Brassow | c108456 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 906 | else |
Mike Snitzer | 542f903 | 2012-07-27 15:08:00 +0100 | [diff] [blame] | 907 | max_io_len = region_size; |
Jonathan Brassow | c108456 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 908 | |
Mike Snitzer | 542f903 | 2012-07-27 15:08:00 +0100 | [diff] [blame] | 909 | if (dm_set_target_max_io_len(rs->ti, max_io_len)) |
| 910 | return -EINVAL; |
Jonathan Brassow | 3273727 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 911 | |
Heinz Mauelshagen | 676fa5a | 2016-05-19 18:49:29 +0200 | [diff] [blame^] | 912 | if (rt_is_raid10(rs->raid_type)) { |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 913 | if (raid10_copies > rs->md.raid_disks) |
| 914 | return ti_error_einval(rs->ti, "Not enough devices to satisfy specification"); |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 915 | |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 916 | /* |
| 917 | * If the format is not "near", we only support |
| 918 | * two copies at the moment. |
| 919 | */ |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 920 | if (strcmp("near", raid10_format) && (raid10_copies > 2)) |
| 921 | return ti_error_einval(rs->ti, "Too many copies for given RAID10 format."); |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 922 | |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 923 | /* (Len * #mirrors) / #devices */ |
| 924 | sectors_per_dev = rs->ti->len * raid10_copies; |
| 925 | sector_div(sectors_per_dev, rs->md.raid_disks); |
| 926 | |
| 927 | rs->md.layout = raid10_format_to_md_layout(raid10_format, |
| 928 | raid10_copies); |
| 929 | rs->md.new_layout = rs->md.layout; |
Heinz Mauelshagen | 676fa5a | 2016-05-19 18:49:29 +0200 | [diff] [blame^] | 930 | } else if (!rt_is_raid1(rs->raid_type) && |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 931 | sector_div(sectors_per_dev, |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 932 | (rs->md.raid_disks - rs->raid_type->parity_devs))) |
| 933 | return ti_error_einval(rs->ti, "Target length not divisible by number of data devices"); |
| 934 | |
Jonathan E Brassow | c039c33 | 2012-07-27 15:08:04 +0100 | [diff] [blame] | 935 | rs->md.dev_sectors = sectors_per_dev; |
| 936 | |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 937 | /* Assume there are no metadata devices until the drives are parsed */ |
| 938 | rs->md.persistent = 0; |
| 939 | rs->md.external = 1; |
| 940 | |
Heinz Mauelshagen | f090279 | 2016-05-19 18:49:27 +0200 | [diff] [blame] | 941 | /* Check, if any invalid ctr arguments have been passed in for the raid level */ |
| 942 | return rs_check_for_invalid_flags(rs); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 943 | } |
| 944 | |
| 945 | static void do_table_event(struct work_struct *ws) |
| 946 | { |
| 947 | struct raid_set *rs = container_of(ws, struct raid_set, md.event_work); |
| 948 | |
| 949 | dm_table_event(rs->ti->table); |
| 950 | } |
| 951 | |
| 952 | static int raid_is_congested(struct dm_target_callbacks *cb, int bits) |
| 953 | { |
| 954 | struct raid_set *rs = container_of(cb, struct raid_set, callbacks); |
| 955 | |
NeilBrown | 5c675f8 | 2014-12-15 12:56:56 +1100 | [diff] [blame] | 956 | return mddev_congested(&rs->md, bits); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 957 | } |
| 958 | |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 959 | /* |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 960 | * This structure is never routinely used by userspace, unlike md superblocks. |
| 961 | * Devices with this superblock should only ever be accessed via device-mapper. |
| 962 | */ |
| 963 | #define DM_RAID_MAGIC 0x64526D44 |
| 964 | struct dm_raid_superblock { |
| 965 | __le32 magic; /* "DmRd" */ |
| 966 | __le32 features; /* Used to indicate possible future changes */ |
| 967 | |
| 968 | __le32 num_devices; /* Number of devices in this array. (Max 64) */ |
| 969 | __le32 array_position; /* The position of this drive in the array */ |
| 970 | |
| 971 | __le64 events; /* Incremented by md when superblock updated */ |
| 972 | __le64 failed_devices; /* Bit field of devices to indicate failures */ |
| 973 | |
| 974 | /* |
| 975 | * This offset tracks the progress of the repair or replacement of |
| 976 | * an individual drive. |
| 977 | */ |
| 978 | __le64 disk_recovery_offset; |
| 979 | |
| 980 | /* |
| 981 | * This offset tracks the progress of the initial array |
| 982 | * synchronisation/parity calculation. |
| 983 | */ |
| 984 | __le64 array_resync_offset; |
| 985 | |
| 986 | /* |
| 987 | * RAID characteristics |
| 988 | */ |
| 989 | __le32 level; |
| 990 | __le32 layout; |
| 991 | __le32 stripe_sectors; |
| 992 | |
Heinz Mauelshagen | 40d43c4 | 2014-10-17 13:38:50 +0200 | [diff] [blame] | 993 | /* Remainder of a logical block is zero-filled when writing (see super_sync()). */ |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 994 | } __packed; |
| 995 | |
NeilBrown | 3cb0300 | 2011-10-11 16:45:26 +1100 | [diff] [blame] | 996 | static int read_disk_sb(struct md_rdev *rdev, int size) |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 997 | { |
| 998 | BUG_ON(!rdev->sb_page); |
| 999 | |
| 1000 | if (rdev->sb_loaded) |
| 1001 | return 0; |
| 1002 | |
Mike Christie | 796a5cf | 2016-06-05 14:32:07 -0500 | [diff] [blame] | 1003 | if (!sync_page_io(rdev, 0, size, rdev->sb_page, REQ_OP_READ, 0, 1)) { |
Jonathan E Brassow | 0447568 | 2012-03-28 18:41:26 +0100 | [diff] [blame] | 1004 | DMERR("Failed to read superblock of device at position %d", |
| 1005 | rdev->raid_disk); |
Jonathan Brassow | c32fb9e | 2012-05-22 13:55:31 +1000 | [diff] [blame] | 1006 | md_error(rdev->mddev, rdev); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1007 | return -EINVAL; |
| 1008 | } |
| 1009 | |
| 1010 | rdev->sb_loaded = 1; |
| 1011 | |
| 1012 | return 0; |
| 1013 | } |
| 1014 | |
NeilBrown | fd01b88 | 2011-10-11 16:47:53 +1100 | [diff] [blame] | 1015 | static void super_sync(struct mddev *mddev, struct md_rdev *rdev) |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1016 | { |
Jonathan Brassow | 81f382f | 2012-05-22 13:55:30 +1000 | [diff] [blame] | 1017 | int i; |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1018 | uint64_t failed_devices; |
| 1019 | struct dm_raid_superblock *sb; |
Jonathan Brassow | 81f382f | 2012-05-22 13:55:30 +1000 | [diff] [blame] | 1020 | struct raid_set *rs = container_of(mddev, struct raid_set, md); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1021 | |
| 1022 | sb = page_address(rdev->sb_page); |
| 1023 | failed_devices = le64_to_cpu(sb->failed_devices); |
| 1024 | |
Jonathan Brassow | 81f382f | 2012-05-22 13:55:30 +1000 | [diff] [blame] | 1025 | for (i = 0; i < mddev->raid_disks; i++) |
| 1026 | if (!rs->dev[i].data_dev || |
| 1027 | test_bit(Faulty, &(rs->dev[i].rdev.flags))) |
| 1028 | failed_devices |= (1ULL << i); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1029 | |
Heinz Mauelshagen | 40d43c4 | 2014-10-17 13:38:50 +0200 | [diff] [blame] | 1030 | memset(sb + 1, 0, rdev->sb_size - sizeof(*sb)); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1031 | |
| 1032 | sb->magic = cpu_to_le32(DM_RAID_MAGIC); |
| 1033 | sb->features = cpu_to_le32(0); /* No features yet */ |
| 1034 | |
| 1035 | sb->num_devices = cpu_to_le32(mddev->raid_disks); |
| 1036 | sb->array_position = cpu_to_le32(rdev->raid_disk); |
| 1037 | |
| 1038 | sb->events = cpu_to_le64(mddev->events); |
| 1039 | sb->failed_devices = cpu_to_le64(failed_devices); |
| 1040 | |
| 1041 | sb->disk_recovery_offset = cpu_to_le64(rdev->recovery_offset); |
| 1042 | sb->array_resync_offset = cpu_to_le64(mddev->recovery_cp); |
| 1043 | |
| 1044 | sb->level = cpu_to_le32(mddev->level); |
| 1045 | sb->layout = cpu_to_le32(mddev->layout); |
| 1046 | sb->stripe_sectors = cpu_to_le32(mddev->chunk_sectors); |
| 1047 | } |
| 1048 | |
| 1049 | /* |
| 1050 | * super_load |
| 1051 | * |
| 1052 | * This function creates a superblock if one is not found on the device |
| 1053 | * and will decide which superblock to use if there's a choice. |
| 1054 | * |
| 1055 | * Return: 1 if use rdev, 0 if use refdev, -Exxx otherwise |
| 1056 | */ |
NeilBrown | 3cb0300 | 2011-10-11 16:45:26 +1100 | [diff] [blame] | 1057 | static int super_load(struct md_rdev *rdev, struct md_rdev *refdev) |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1058 | { |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1059 | int r; |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1060 | struct dm_raid_superblock *sb; |
| 1061 | struct dm_raid_superblock *refsb; |
| 1062 | uint64_t events_sb, events_refsb; |
| 1063 | |
| 1064 | rdev->sb_start = 0; |
Heinz Mauelshagen | 40d43c4 | 2014-10-17 13:38:50 +0200 | [diff] [blame] | 1065 | rdev->sb_size = bdev_logical_block_size(rdev->meta_bdev); |
| 1066 | if (rdev->sb_size < sizeof(*sb) || rdev->sb_size > PAGE_SIZE) { |
| 1067 | DMERR("superblock size of a logical block is no longer valid"); |
| 1068 | return -EINVAL; |
| 1069 | } |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1070 | |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1071 | r = read_disk_sb(rdev, rdev->sb_size); |
| 1072 | if (r) |
| 1073 | return r; |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1074 | |
| 1075 | sb = page_address(rdev->sb_page); |
Jonathan E Brassow | 3aa3b2b | 2012-03-07 19:09:47 +0000 | [diff] [blame] | 1076 | |
| 1077 | /* |
| 1078 | * Two cases that we want to write new superblocks and rebuild: |
| 1079 | * 1) New device (no matching magic number) |
| 1080 | * 2) Device specified for rebuild (!In_sync w/ offset == 0) |
| 1081 | */ |
| 1082 | if ((sb->magic != cpu_to_le32(DM_RAID_MAGIC)) || |
| 1083 | (!test_bit(In_sync, &rdev->flags) && !rdev->recovery_offset)) { |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1084 | super_sync(rdev->mddev, rdev); |
| 1085 | |
| 1086 | set_bit(FirstUse, &rdev->flags); |
| 1087 | |
| 1088 | /* Force writing of superblocks to disk */ |
| 1089 | set_bit(MD_CHANGE_DEVS, &rdev->mddev->flags); |
| 1090 | |
| 1091 | /* Any superblock is better than none, choose that if given */ |
| 1092 | return refdev ? 0 : 1; |
| 1093 | } |
| 1094 | |
| 1095 | if (!refdev) |
| 1096 | return 1; |
| 1097 | |
| 1098 | events_sb = le64_to_cpu(sb->events); |
| 1099 | |
| 1100 | refsb = page_address(refdev->sb_page); |
| 1101 | events_refsb = le64_to_cpu(refsb->events); |
| 1102 | |
| 1103 | return (events_sb > events_refsb) ? 1 : 0; |
| 1104 | } |
| 1105 | |
NeilBrown | fd01b88 | 2011-10-11 16:47:53 +1100 | [diff] [blame] | 1106 | static int super_init_validation(struct mddev *mddev, struct md_rdev *rdev) |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1107 | { |
| 1108 | int role; |
| 1109 | struct raid_set *rs = container_of(mddev, struct raid_set, md); |
| 1110 | uint64_t events_sb; |
| 1111 | uint64_t failed_devices; |
| 1112 | struct dm_raid_superblock *sb; |
| 1113 | uint32_t new_devs = 0; |
| 1114 | uint32_t rebuilds = 0; |
NeilBrown | dafb20f | 2012-03-19 12:46:39 +1100 | [diff] [blame] | 1115 | struct md_rdev *r; |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1116 | struct dm_raid_superblock *sb2; |
| 1117 | |
| 1118 | sb = page_address(rdev->sb_page); |
| 1119 | events_sb = le64_to_cpu(sb->events); |
| 1120 | failed_devices = le64_to_cpu(sb->failed_devices); |
| 1121 | |
| 1122 | /* |
| 1123 | * Initialise to 1 if this is a new superblock. |
| 1124 | */ |
| 1125 | mddev->events = events_sb ? : 1; |
| 1126 | |
| 1127 | /* |
| 1128 | * Reshaping is not currently allowed |
| 1129 | */ |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 1130 | if (le32_to_cpu(sb->level) != mddev->level) { |
| 1131 | DMERR("Reshaping arrays not yet supported. (RAID level change)"); |
| 1132 | return -EINVAL; |
| 1133 | } |
| 1134 | if (le32_to_cpu(sb->layout) != mddev->layout) { |
| 1135 | DMERR("Reshaping arrays not yet supported. (RAID layout change)"); |
| 1136 | DMERR(" 0x%X vs 0x%X", le32_to_cpu(sb->layout), mddev->layout); |
| 1137 | DMERR(" Old layout: %s w/ %d copies", |
| 1138 | raid10_md_layout_to_format(le32_to_cpu(sb->layout)), |
| 1139 | raid10_md_layout_to_copies(le32_to_cpu(sb->layout))); |
| 1140 | DMERR(" New layout: %s w/ %d copies", |
| 1141 | raid10_md_layout_to_format(mddev->layout), |
| 1142 | raid10_md_layout_to_copies(mddev->layout)); |
| 1143 | return -EINVAL; |
| 1144 | } |
| 1145 | if (le32_to_cpu(sb->stripe_sectors) != mddev->chunk_sectors) { |
| 1146 | DMERR("Reshaping arrays not yet supported. (stripe sectors change)"); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1147 | return -EINVAL; |
| 1148 | } |
| 1149 | |
| 1150 | /* We can only change the number of devices in RAID1 right now */ |
Heinz Mauelshagen | 676fa5a | 2016-05-19 18:49:29 +0200 | [diff] [blame^] | 1151 | if (!rt_is_raid1(rs->raid_type) && |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1152 | (le32_to_cpu(sb->num_devices) != mddev->raid_disks)) { |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 1153 | DMERR("Reshaping arrays not yet supported. (device count change)"); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1154 | return -EINVAL; |
| 1155 | } |
| 1156 | |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 1157 | if (!(_test_flags(CTR_FLAGS_ANY_SYNC, rs->ctr_flags))) |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1158 | mddev->recovery_cp = le64_to_cpu(sb->array_resync_offset); |
| 1159 | |
| 1160 | /* |
| 1161 | * During load, we set FirstUse if a new superblock was written. |
| 1162 | * There are two reasons we might not have a superblock: |
| 1163 | * 1) The array is brand new - in which case, all of the |
| 1164 | * devices must have their In_sync bit set. Also, |
| 1165 | * recovery_cp must be 0, unless forced. |
| 1166 | * 2) This is a new device being added to an old array |
| 1167 | * and the new device needs to be rebuilt - in which |
| 1168 | * case the In_sync bit will /not/ be set and |
| 1169 | * recovery_cp must be MaxSector. |
| 1170 | */ |
NeilBrown | dafb20f | 2012-03-19 12:46:39 +1100 | [diff] [blame] | 1171 | rdev_for_each(r, mddev) { |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1172 | if (!test_bit(In_sync, &r->flags)) { |
Jonathan E Brassow | 3aa3b2b | 2012-03-07 19:09:47 +0000 | [diff] [blame] | 1173 | DMINFO("Device %d specified for rebuild: " |
| 1174 | "Clearing superblock", r->raid_disk); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1175 | rebuilds++; |
| 1176 | } else if (test_bit(FirstUse, &r->flags)) |
| 1177 | new_devs++; |
| 1178 | } |
| 1179 | |
| 1180 | if (!rebuilds) { |
| 1181 | if (new_devs == mddev->raid_disks) { |
| 1182 | DMINFO("Superblocks created for new array"); |
| 1183 | set_bit(MD_ARRAY_FIRST_USE, &mddev->flags); |
| 1184 | } else if (new_devs) { |
| 1185 | DMERR("New device injected " |
| 1186 | "into existing array without 'rebuild' " |
| 1187 | "parameter specified"); |
| 1188 | return -EINVAL; |
| 1189 | } |
| 1190 | } else if (new_devs) { |
| 1191 | DMERR("'rebuild' devices cannot be " |
| 1192 | "injected into an array with other first-time devices"); |
| 1193 | return -EINVAL; |
| 1194 | } else if (mddev->recovery_cp != MaxSector) { |
| 1195 | DMERR("'rebuild' specified while array is not in-sync"); |
| 1196 | return -EINVAL; |
| 1197 | } |
| 1198 | |
| 1199 | /* |
| 1200 | * Now we set the Faulty bit for those devices that are |
| 1201 | * recorded in the superblock as failed. |
| 1202 | */ |
NeilBrown | dafb20f | 2012-03-19 12:46:39 +1100 | [diff] [blame] | 1203 | rdev_for_each(r, mddev) { |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1204 | if (!r->sb_page) |
| 1205 | continue; |
| 1206 | sb2 = page_address(r->sb_page); |
| 1207 | sb2->failed_devices = 0; |
| 1208 | |
| 1209 | /* |
| 1210 | * Check for any device re-ordering. |
| 1211 | */ |
| 1212 | if (!test_bit(FirstUse, &r->flags) && (r->raid_disk >= 0)) { |
| 1213 | role = le32_to_cpu(sb2->array_position); |
| 1214 | if (role != r->raid_disk) { |
Heinz Mauelshagen | 676fa5a | 2016-05-19 18:49:29 +0200 | [diff] [blame^] | 1215 | if (!rt_is_raid1(rs->raid_type)) |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1216 | return ti_error_einval(rs->ti, "Cannot change device " |
| 1217 | "positions in RAID array"); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1218 | DMINFO("RAID1 device #%d now at position #%d", |
| 1219 | role, r->raid_disk); |
| 1220 | } |
| 1221 | |
| 1222 | /* |
| 1223 | * Partial recovery is performed on |
| 1224 | * returning failed devices. |
| 1225 | */ |
| 1226 | if (failed_devices & (1 << role)) |
| 1227 | set_bit(Faulty, &r->flags); |
| 1228 | } |
| 1229 | } |
| 1230 | |
| 1231 | return 0; |
| 1232 | } |
| 1233 | |
Heinz Mauelshagen | 0cf4503 | 2015-04-29 14:03:04 +0200 | [diff] [blame] | 1234 | static int super_validate(struct raid_set *rs, struct md_rdev *rdev) |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1235 | { |
Heinz Mauelshagen | 0cf4503 | 2015-04-29 14:03:04 +0200 | [diff] [blame] | 1236 | struct mddev *mddev = &rs->md; |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1237 | struct dm_raid_superblock *sb = page_address(rdev->sb_page); |
| 1238 | |
| 1239 | /* |
| 1240 | * If mddev->events is not set, we know we have not yet initialized |
| 1241 | * the array. |
| 1242 | */ |
| 1243 | if (!mddev->events && super_init_validation(mddev, rdev)) |
| 1244 | return -EINVAL; |
| 1245 | |
Heinz Mauelshagen | 4c9971c | 2016-04-29 18:59:56 +0200 | [diff] [blame] | 1246 | if (le32_to_cpu(sb->features)) { |
| 1247 | rs->ti->error = "Unable to assemble array: No feature flags supported yet"; |
| 1248 | return -EINVAL; |
| 1249 | } |
| 1250 | |
Heinz Mauelshagen | 0cf4503 | 2015-04-29 14:03:04 +0200 | [diff] [blame] | 1251 | /* Enable bitmap creation for RAID levels != 0 */ |
Heinz Mauelshagen | 676fa5a | 2016-05-19 18:49:29 +0200 | [diff] [blame^] | 1252 | mddev->bitmap_info.offset = rt_is_raid0(rs->raid_type) ? 0 : to_sector(4096); |
Heinz Mauelshagen | 0cf4503 | 2015-04-29 14:03:04 +0200 | [diff] [blame] | 1253 | rdev->mddev->bitmap_info.default_offset = mddev->bitmap_info.offset; |
| 1254 | |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1255 | if (!test_bit(FirstUse, &rdev->flags)) { |
| 1256 | rdev->recovery_offset = le64_to_cpu(sb->disk_recovery_offset); |
| 1257 | if (rdev->recovery_offset != MaxSector) |
| 1258 | clear_bit(In_sync, &rdev->flags); |
| 1259 | } |
| 1260 | |
| 1261 | /* |
| 1262 | * If a device comes back, set it as not In_sync and no longer faulty. |
| 1263 | */ |
| 1264 | if (test_bit(Faulty, &rdev->flags)) { |
| 1265 | clear_bit(Faulty, &rdev->flags); |
| 1266 | clear_bit(In_sync, &rdev->flags); |
| 1267 | rdev->saved_raid_disk = rdev->raid_disk; |
| 1268 | rdev->recovery_offset = 0; |
| 1269 | } |
| 1270 | |
| 1271 | clear_bit(FirstUse, &rdev->flags); |
| 1272 | |
| 1273 | return 0; |
| 1274 | } |
| 1275 | |
| 1276 | /* |
| 1277 | * Analyse superblocks and select the freshest. |
| 1278 | */ |
| 1279 | static int analyse_superblocks(struct dm_target *ti, struct raid_set *rs) |
| 1280 | { |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1281 | int r; |
Jonathan E Brassow | 0447568 | 2012-03-28 18:41:26 +0100 | [diff] [blame] | 1282 | struct raid_dev *dev; |
Jonathan Brassow | a9ad852 | 2012-04-24 10:23:13 +1000 | [diff] [blame] | 1283 | struct md_rdev *rdev, *tmp, *freshest; |
NeilBrown | fd01b88 | 2011-10-11 16:47:53 +1100 | [diff] [blame] | 1284 | struct mddev *mddev = &rs->md; |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1285 | |
| 1286 | freshest = NULL; |
Jonathan Brassow | a9ad852 | 2012-04-24 10:23:13 +1000 | [diff] [blame] | 1287 | rdev_for_each_safe(rdev, tmp, mddev) { |
Jonathan Brassow | 761becf | 2012-10-11 13:42:19 +1100 | [diff] [blame] | 1288 | /* |
Heinz Mauelshagen | c76d53f | 2015-04-29 14:03:00 +0200 | [diff] [blame] | 1289 | * Skipping super_load due to CTR_FLAG_SYNC will cause |
Jonathan Brassow | 761becf | 2012-10-11 13:42:19 +1100 | [diff] [blame] | 1290 | * the array to undergo initialization again as |
| 1291 | * though it were new. This is the intended effect |
| 1292 | * of the "sync" directive. |
| 1293 | * |
| 1294 | * When reshaping capability is added, we must ensure |
| 1295 | * that the "sync" directive is disallowed during the |
| 1296 | * reshape. |
| 1297 | */ |
Heinz Mauelshagen | 0cf4503 | 2015-04-29 14:03:04 +0200 | [diff] [blame] | 1298 | rdev->sectors = to_sector(i_size_read(rdev->bdev->bd_inode)); |
| 1299 | |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 1300 | if (_test_flag(CTR_FLAG_SYNC, rs->ctr_flags)) |
Jonathan Brassow | 761becf | 2012-10-11 13:42:19 +1100 | [diff] [blame] | 1301 | continue; |
| 1302 | |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1303 | if (!rdev->meta_bdev) |
| 1304 | continue; |
| 1305 | |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1306 | r = super_load(rdev, freshest); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1307 | |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1308 | switch (r) { |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1309 | case 1: |
| 1310 | freshest = rdev; |
| 1311 | break; |
| 1312 | case 0: |
| 1313 | break; |
| 1314 | default: |
Jonathan E Brassow | 0447568 | 2012-03-28 18:41:26 +0100 | [diff] [blame] | 1315 | dev = container_of(rdev, struct raid_dev, rdev); |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 1316 | if (dev->meta_dev) |
| 1317 | dm_put_device(ti, dev->meta_dev); |
Jonathan E Brassow | 0447568 | 2012-03-28 18:41:26 +0100 | [diff] [blame] | 1318 | |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 1319 | dev->meta_dev = NULL; |
| 1320 | rdev->meta_bdev = NULL; |
Jonathan E Brassow | 0447568 | 2012-03-28 18:41:26 +0100 | [diff] [blame] | 1321 | |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 1322 | if (rdev->sb_page) |
| 1323 | put_page(rdev->sb_page); |
Jonathan E Brassow | 0447568 | 2012-03-28 18:41:26 +0100 | [diff] [blame] | 1324 | |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 1325 | rdev->sb_page = NULL; |
Jonathan E Brassow | 0447568 | 2012-03-28 18:41:26 +0100 | [diff] [blame] | 1326 | |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 1327 | rdev->sb_loaded = 0; |
Jonathan E Brassow | 0447568 | 2012-03-28 18:41:26 +0100 | [diff] [blame] | 1328 | |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 1329 | /* |
| 1330 | * We might be able to salvage the data device |
| 1331 | * even though the meta device has failed. For |
| 1332 | * now, we behave as though '- -' had been |
| 1333 | * set for this device in the table. |
| 1334 | */ |
| 1335 | if (dev->data_dev) |
| 1336 | dm_put_device(ti, dev->data_dev); |
Jonathan E Brassow | 0447568 | 2012-03-28 18:41:26 +0100 | [diff] [blame] | 1337 | |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 1338 | dev->data_dev = NULL; |
| 1339 | rdev->bdev = NULL; |
Jonathan E Brassow | 0447568 | 2012-03-28 18:41:26 +0100 | [diff] [blame] | 1340 | |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 1341 | list_del(&rdev->same_set); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1342 | } |
| 1343 | } |
| 1344 | |
| 1345 | if (!freshest) |
| 1346 | return 0; |
| 1347 | |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1348 | if (validate_raid_redundancy(rs)) |
| 1349 | return ti_error_einval(rs->ti, "Insufficient redundancy to activate array"); |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 1350 | |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1351 | /* |
| 1352 | * Validation of the freshest device provides the source of |
| 1353 | * validation for the remaining devices. |
| 1354 | */ |
Heinz Mauelshagen | 0cf4503 | 2015-04-29 14:03:04 +0200 | [diff] [blame] | 1355 | if (super_validate(rs, freshest)) |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1356 | return ti_error_einval(rs->ti, "Unable to assemble array: Invalid superblocks"); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1357 | |
NeilBrown | dafb20f | 2012-03-19 12:46:39 +1100 | [diff] [blame] | 1358 | rdev_for_each(rdev, mddev) |
Heinz Mauelshagen | 0cf4503 | 2015-04-29 14:03:04 +0200 | [diff] [blame] | 1359 | if ((rdev != freshest) && super_validate(rs, rdev)) |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1360 | return -EINVAL; |
| 1361 | |
| 1362 | return 0; |
| 1363 | } |
| 1364 | |
| 1365 | /* |
Heinz Mauelshagen | 48cf06b | 2014-09-24 17:47:19 +0200 | [diff] [blame] | 1366 | * Enable/disable discard support on RAID set depending on |
| 1367 | * RAID level and discard properties of underlying RAID members. |
Heinz Mauelshagen | 75b8e04 | 2014-09-24 17:47:18 +0200 | [diff] [blame] | 1368 | */ |
| 1369 | static void configure_discard_support(struct dm_target *ti, struct raid_set *rs) |
| 1370 | { |
Heinz Mauelshagen | 48cf06b | 2014-09-24 17:47:19 +0200 | [diff] [blame] | 1371 | int i; |
| 1372 | bool raid456; |
| 1373 | |
Heinz Mauelshagen | 75b8e04 | 2014-09-24 17:47:18 +0200 | [diff] [blame] | 1374 | /* Assume discards not supported until after checks below. */ |
| 1375 | ti->discards_supported = false; |
| 1376 | |
| 1377 | /* RAID level 4,5,6 require discard_zeroes_data for data integrity! */ |
Heinz Mauelshagen | 48cf06b | 2014-09-24 17:47:19 +0200 | [diff] [blame] | 1378 | raid456 = (rs->md.level == 4 || rs->md.level == 5 || rs->md.level == 6); |
Heinz Mauelshagen | 75b8e04 | 2014-09-24 17:47:18 +0200 | [diff] [blame] | 1379 | |
Heinz Mauelshagen | 48cf06b | 2014-09-24 17:47:19 +0200 | [diff] [blame] | 1380 | for (i = 0; i < rs->md.raid_disks; i++) { |
Heinz Mauelshagen | d20c4b0 | 2014-10-29 19:02:27 +0100 | [diff] [blame] | 1381 | struct request_queue *q; |
Heinz Mauelshagen | 48cf06b | 2014-09-24 17:47:19 +0200 | [diff] [blame] | 1382 | |
Heinz Mauelshagen | d20c4b0 | 2014-10-29 19:02:27 +0100 | [diff] [blame] | 1383 | if (!rs->dev[i].rdev.bdev) |
| 1384 | continue; |
| 1385 | |
| 1386 | q = bdev_get_queue(rs->dev[i].rdev.bdev); |
Heinz Mauelshagen | 48cf06b | 2014-09-24 17:47:19 +0200 | [diff] [blame] | 1387 | if (!q || !blk_queue_discard(q)) |
| 1388 | return; |
| 1389 | |
| 1390 | if (raid456) { |
| 1391 | if (!q->limits.discard_zeroes_data) |
| 1392 | return; |
| 1393 | if (!devices_handle_discard_safely) { |
| 1394 | DMERR("raid456 discard support disabled due to discard_zeroes_data uncertainty."); |
| 1395 | DMERR("Set dm-raid.devices_handle_discard_safely=Y to override."); |
| 1396 | return; |
| 1397 | } |
| 1398 | } |
| 1399 | } |
| 1400 | |
| 1401 | /* All RAID members properly support discards */ |
Heinz Mauelshagen | 75b8e04 | 2014-09-24 17:47:18 +0200 | [diff] [blame] | 1402 | ti->discards_supported = true; |
| 1403 | |
| 1404 | /* |
| 1405 | * RAID1 and RAID10 personalities require bio splitting, |
Heinz Mauelshagen | 48cf06b | 2014-09-24 17:47:19 +0200 | [diff] [blame] | 1406 | * RAID0/4/5/6 don't and process large discard bios properly. |
Heinz Mauelshagen | 75b8e04 | 2014-09-24 17:47:18 +0200 | [diff] [blame] | 1407 | */ |
Heinz Mauelshagen | 48cf06b | 2014-09-24 17:47:19 +0200 | [diff] [blame] | 1408 | ti->split_discard_bios = !!(rs->md.level == 1 || rs->md.level == 10); |
Heinz Mauelshagen | 75b8e04 | 2014-09-24 17:47:18 +0200 | [diff] [blame] | 1409 | ti->num_discard_bios = 1; |
| 1410 | } |
| 1411 | |
| 1412 | /* |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1413 | * Construct a RAID0/1/10/4/5/6 mapping: |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1414 | * Args: |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1415 | * <raid_type> <#raid_params> <raid_params>{0,} \ |
| 1416 | * <#raid_devs> [<meta_dev1> <dev1>]{1,} |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1417 | * |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1418 | * <raid_params> varies by <raid_type>. See 'parse_raid_params' for |
| 1419 | * details on possible <raid_params>. |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1420 | * |
| 1421 | * Userspace is free to initialize the metadata devices, hence the superblocks to |
| 1422 | * enforce recreation based on the passed in table parameters. |
| 1423 | * |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1424 | */ |
| 1425 | static int raid_ctr(struct dm_target *ti, unsigned argc, char **argv) |
| 1426 | { |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1427 | int r; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1428 | struct raid_type *rt; |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 1429 | unsigned num_raid_params, num_raid_devs; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1430 | struct raid_set *rs = NULL; |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 1431 | const char *arg; |
| 1432 | struct dm_arg_set as = { argc, argv }, as_nrd; |
| 1433 | struct dm_arg _args[] = { |
| 1434 | { 0, as.argc, "Cannot understand number of raid parameters" }, |
| 1435 | { 1, 254, "Cannot understand number of raid devices parameters" } |
| 1436 | }; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1437 | |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 1438 | /* Must have <raid_type> */ |
| 1439 | arg = dm_shift_arg(&as); |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1440 | if (!arg) |
| 1441 | return ti_error_einval(rs->ti, "No arguments"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1442 | |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 1443 | rt = get_raid_type(arg); |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1444 | if (!rt) |
| 1445 | return ti_error_einval(rs->ti, "Unrecognised raid_type"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1446 | |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 1447 | /* Must have <#raid_params> */ |
| 1448 | if (dm_read_arg_group(_args, &as, &num_raid_params, &ti->error)) |
| 1449 | return -EINVAL; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1450 | |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 1451 | /* number of raid device tupples <meta_dev data_dev> */ |
| 1452 | as_nrd = as; |
| 1453 | dm_consume_args(&as_nrd, num_raid_params); |
| 1454 | _args[1].max = (as_nrd.argc - 1) / 2; |
| 1455 | if (dm_read_arg(_args + 1, &as_nrd, &num_raid_devs, &ti->error)) |
| 1456 | return -EINVAL; |
| 1457 | |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1458 | if (!_in_range(num_raid_devs, 1, MAX_RAID_DEVICES)) |
| 1459 | return ti_error_einval(rs->ti, "Invalid number of supplied raid devices"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1460 | |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 1461 | rs = context_alloc(ti, rt, num_raid_devs); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1462 | if (IS_ERR(rs)) |
| 1463 | return PTR_ERR(rs); |
| 1464 | |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 1465 | r = parse_raid_params(rs, &as, num_raid_params); |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1466 | if (r) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1467 | goto bad; |
| 1468 | |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1469 | r = parse_dev_params(rs, &as); |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1470 | if (r) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1471 | goto bad; |
| 1472 | |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1473 | rs->md.sync_super = super_sync; |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1474 | r = analyse_superblocks(ti, rs); |
| 1475 | if (r) |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1476 | goto bad; |
| 1477 | |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1478 | INIT_WORK(&rs->md.event_work, do_table_event); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1479 | ti->private = rs; |
Alasdair G Kergon | 55a62ee | 2013-03-01 22:45:47 +0000 | [diff] [blame] | 1480 | ti->num_flush_bios = 1; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1481 | |
Heinz Mauelshagen | 75b8e04 | 2014-09-24 17:47:18 +0200 | [diff] [blame] | 1482 | /* |
| 1483 | * Disable/enable discard support on RAID set. |
| 1484 | */ |
| 1485 | configure_discard_support(ti, rs); |
| 1486 | |
Heinz Mauelshagen | 0cf4503 | 2015-04-29 14:03:04 +0200 | [diff] [blame] | 1487 | /* Has to be held on running the array */ |
| 1488 | mddev_lock_nointr(&rs->md); |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1489 | r = md_run(&rs->md); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1490 | rs->md.in_sync = 0; /* Assume already marked dirty */ |
Heinz Mauelshagen | 0cf4503 | 2015-04-29 14:03:04 +0200 | [diff] [blame] | 1491 | mddev_unlock(&rs->md); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1492 | |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1493 | if (r) { |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1494 | ti->error = "Fail to run raid array"; |
| 1495 | goto bad; |
| 1496 | } |
| 1497 | |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 1498 | if (ti->len != rs->md.array_sectors) { |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1499 | r = ti_error_einval(ti, "Array size does not match requested target length"); |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 1500 | goto size_mismatch; |
| 1501 | } |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1502 | rs->callbacks.congested_fn = raid_is_congested; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1503 | dm_table_add_target_callbacks(ti->table, &rs->callbacks); |
| 1504 | |
Jonathan Brassow | 3273727 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1505 | mddev_suspend(&rs->md); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1506 | return 0; |
| 1507 | |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 1508 | size_mismatch: |
| 1509 | md_stop(&rs->md); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1510 | bad: |
| 1511 | context_free(rs); |
| 1512 | |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1513 | return r; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1514 | } |
| 1515 | |
| 1516 | static void raid_dtr(struct dm_target *ti) |
| 1517 | { |
| 1518 | struct raid_set *rs = ti->private; |
| 1519 | |
| 1520 | list_del_init(&rs->callbacks.list); |
| 1521 | md_stop(&rs->md); |
| 1522 | context_free(rs); |
| 1523 | } |
| 1524 | |
Mikulas Patocka | 7de3ee5 | 2012-12-21 20:23:41 +0000 | [diff] [blame] | 1525 | static int raid_map(struct dm_target *ti, struct bio *bio) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1526 | { |
| 1527 | struct raid_set *rs = ti->private; |
NeilBrown | fd01b88 | 2011-10-11 16:47:53 +1100 | [diff] [blame] | 1528 | struct mddev *mddev = &rs->md; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1529 | |
| 1530 | mddev->pers->make_request(mddev, bio); |
| 1531 | |
| 1532 | return DM_MAPIO_SUBMITTED; |
| 1533 | } |
| 1534 | |
Jonathan Brassow | be83651 | 2013-04-24 11:42:43 +1000 | [diff] [blame] | 1535 | static const char *decipher_sync_action(struct mddev *mddev) |
| 1536 | { |
| 1537 | if (test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) |
| 1538 | return "frozen"; |
| 1539 | |
| 1540 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
| 1541 | (!mddev->ro && test_bit(MD_RECOVERY_NEEDED, &mddev->recovery))) { |
| 1542 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) |
| 1543 | return "reshape"; |
| 1544 | |
| 1545 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
| 1546 | if (!test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) |
| 1547 | return "resync"; |
| 1548 | else if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) |
| 1549 | return "check"; |
| 1550 | return "repair"; |
| 1551 | } |
| 1552 | |
| 1553 | if (test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) |
| 1554 | return "recover"; |
| 1555 | } |
| 1556 | |
| 1557 | return "idle"; |
| 1558 | } |
| 1559 | |
Mikulas Patocka | fd7c092 | 2013-03-01 22:45:44 +0000 | [diff] [blame] | 1560 | static void raid_status(struct dm_target *ti, status_type_t type, |
| 1561 | unsigned status_flags, char *result, unsigned maxlen) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1562 | { |
| 1563 | struct raid_set *rs = ti->private; |
| 1564 | unsigned raid_param_cnt = 1; /* at least 1 for chunksize */ |
| 1565 | unsigned sz = 0; |
Jonathan E Brassow | 2e727c3 | 2011-10-31 20:21:26 +0000 | [diff] [blame] | 1566 | int i, array_in_sync = 0; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1567 | sector_t sync; |
| 1568 | |
| 1569 | switch (type) { |
| 1570 | case STATUSTYPE_INFO: |
| 1571 | DMEMIT("%s %d ", rs->raid_type->name, rs->md.raid_disks); |
| 1572 | |
Heinz Mauelshagen | 676fa5a | 2016-05-19 18:49:29 +0200 | [diff] [blame^] | 1573 | if (!rt_is_raid0(rs->raid_type)) { |
Heinz Mauelshagen | 0cf4503 | 2015-04-29 14:03:04 +0200 | [diff] [blame] | 1574 | if (test_bit(MD_RECOVERY_RUNNING, &rs->md.recovery)) |
| 1575 | sync = rs->md.curr_resync_completed; |
| 1576 | else |
| 1577 | sync = rs->md.recovery_cp; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1578 | |
Heinz Mauelshagen | 0cf4503 | 2015-04-29 14:03:04 +0200 | [diff] [blame] | 1579 | if (sync >= rs->md.resync_max_sectors) { |
| 1580 | /* |
| 1581 | * Sync complete. |
| 1582 | */ |
| 1583 | array_in_sync = 1; |
| 1584 | sync = rs->md.resync_max_sectors; |
| 1585 | } else if (test_bit(MD_RECOVERY_REQUESTED, &rs->md.recovery)) { |
| 1586 | /* |
| 1587 | * If "check" or "repair" is occurring, the array has |
| 1588 | * undergone and initial sync and the health characters |
| 1589 | * should not be 'a' anymore. |
| 1590 | */ |
| 1591 | array_in_sync = 1; |
| 1592 | } else { |
| 1593 | /* |
| 1594 | * The array may be doing an initial sync, or it may |
| 1595 | * be rebuilding individual components. If all the |
| 1596 | * devices are In_sync, then it is the array that is |
| 1597 | * being initialized. |
| 1598 | */ |
| 1599 | for (i = 0; i < rs->md.raid_disks; i++) |
| 1600 | if (!test_bit(In_sync, &rs->dev[i].rdev.flags)) |
| 1601 | array_in_sync = 1; |
| 1602 | } |
| 1603 | } else { |
| 1604 | /* RAID0 */ |
Jonathan E Brassow | 2e727c3 | 2011-10-31 20:21:26 +0000 | [diff] [blame] | 1605 | array_in_sync = 1; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1606 | sync = rs->md.resync_max_sectors; |
Jonathan E Brassow | 2e727c3 | 2011-10-31 20:21:26 +0000 | [diff] [blame] | 1607 | } |
Jonathan Brassow | be83651 | 2013-04-24 11:42:43 +1000 | [diff] [blame] | 1608 | |
Jonathan E Brassow | 2e727c3 | 2011-10-31 20:21:26 +0000 | [diff] [blame] | 1609 | /* |
| 1610 | * Status characters: |
| 1611 | * 'D' = Dead/Failed device |
| 1612 | * 'a' = Alive but not in-sync |
| 1613 | * 'A' = Alive and in-sync |
| 1614 | */ |
| 1615 | for (i = 0; i < rs->md.raid_disks; i++) { |
| 1616 | if (test_bit(Faulty, &rs->dev[i].rdev.flags)) |
| 1617 | DMEMIT("D"); |
| 1618 | else if (!array_in_sync || |
| 1619 | !test_bit(In_sync, &rs->dev[i].rdev.flags)) |
| 1620 | DMEMIT("a"); |
| 1621 | else |
| 1622 | DMEMIT("A"); |
| 1623 | } |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1624 | |
Jonathan E Brassow | 2e727c3 | 2011-10-31 20:21:26 +0000 | [diff] [blame] | 1625 | /* |
| 1626 | * In-sync ratio: |
| 1627 | * The in-sync ratio shows the progress of: |
| 1628 | * - Initializing the array |
| 1629 | * - Rebuilding a subset of devices of the array |
| 1630 | * The user can distinguish between the two by referring |
| 1631 | * to the status characters. |
| 1632 | */ |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1633 | DMEMIT(" %llu/%llu", |
| 1634 | (unsigned long long) sync, |
| 1635 | (unsigned long long) rs->md.resync_max_sectors); |
| 1636 | |
Jonathan Brassow | be83651 | 2013-04-24 11:42:43 +1000 | [diff] [blame] | 1637 | /* |
| 1638 | * Sync action: |
| 1639 | * See Documentation/device-mapper/dm-raid.c for |
| 1640 | * information on each of these states. |
| 1641 | */ |
| 1642 | DMEMIT(" %s", decipher_sync_action(&rs->md)); |
| 1643 | |
| 1644 | /* |
| 1645 | * resync_mismatches/mismatch_cnt |
| 1646 | * This field shows the number of discrepancies found when |
| 1647 | * performing a "check" of the array. |
| 1648 | */ |
| 1649 | DMEMIT(" %llu", |
Jonathan Brassow | c4a3955 | 2013-06-25 01:23:59 -0500 | [diff] [blame] | 1650 | (strcmp(rs->md.last_sync_action, "check")) ? 0 : |
Jonathan Brassow | be83651 | 2013-04-24 11:42:43 +1000 | [diff] [blame] | 1651 | (unsigned long long) |
| 1652 | atomic64_read(&rs->md.resync_mismatches)); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1653 | break; |
| 1654 | case STATUSTYPE_TABLE: |
| 1655 | /* The string you would use to construct this array */ |
Jonathan Brassow | 46bed2b | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1656 | for (i = 0; i < rs->md.raid_disks; i++) { |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 1657 | if (_test_flag(CTR_FLAG_REBUILD, rs->ctr_flags) && |
Jonathan Brassow | 13c8758 | 2011-08-02 12:32:03 +0100 | [diff] [blame] | 1658 | rs->dev[i].data_dev && |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1659 | !test_bit(In_sync, &rs->dev[i].rdev.flags)) |
Jonathan Brassow | 13c8758 | 2011-08-02 12:32:03 +0100 | [diff] [blame] | 1660 | raid_param_cnt += 2; /* for rebuilds */ |
Jonathan Brassow | 46bed2b | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1661 | if (rs->dev[i].data_dev && |
| 1662 | test_bit(WriteMostly, &rs->dev[i].rdev.flags)) |
| 1663 | raid_param_cnt += 2; |
| 1664 | } |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1665 | |
Heinz Mauelshagen | c76d53f | 2015-04-29 14:03:00 +0200 | [diff] [blame] | 1666 | raid_param_cnt += (hweight32(rs->ctr_flags & ~CTR_FLAG_REBUILD) * 2); |
| 1667 | if (rs->ctr_flags & (CTR_FLAG_SYNC | CTR_FLAG_NOSYNC)) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1668 | raid_param_cnt--; |
| 1669 | |
| 1670 | DMEMIT("%s %u %u", rs->raid_type->name, |
| 1671 | raid_param_cnt, rs->md.chunk_sectors); |
| 1672 | |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 1673 | if (_test_flag(CTR_FLAG_SYNC, rs->ctr_flags) && |
| 1674 | rs->md.recovery_cp == MaxSector) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1675 | DMEMIT(" sync"); |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 1676 | if (_test_flag(CTR_FLAG_NOSYNC, rs->ctr_flags)) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1677 | DMEMIT(" nosync"); |
| 1678 | |
| 1679 | for (i = 0; i < rs->md.raid_disks; i++) |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 1680 | if (_test_flag(CTR_FLAG_REBUILD, rs->ctr_flags) && |
Jonathan Brassow | 13c8758 | 2011-08-02 12:32:03 +0100 | [diff] [blame] | 1681 | rs->dev[i].data_dev && |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1682 | !test_bit(In_sync, &rs->dev[i].rdev.flags)) |
| 1683 | DMEMIT(" rebuild %u", i); |
| 1684 | |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 1685 | if (_test_flag(CTR_FLAG_DAEMON_SLEEP, rs->ctr_flags)) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1686 | DMEMIT(" daemon_sleep %lu", |
| 1687 | rs->md.bitmap_info.daemon_sleep); |
| 1688 | |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 1689 | if (_test_flag(CTR_FLAG_MIN_RECOVERY_RATE, rs->ctr_flags)) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1690 | DMEMIT(" min_recovery_rate %d", rs->md.sync_speed_min); |
| 1691 | |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 1692 | if (_test_flag(CTR_FLAG_MAX_RECOVERY_RATE, rs->ctr_flags)) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1693 | DMEMIT(" max_recovery_rate %d", rs->md.sync_speed_max); |
| 1694 | |
Jonathan Brassow | 46bed2b | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1695 | for (i = 0; i < rs->md.raid_disks; i++) |
| 1696 | if (rs->dev[i].data_dev && |
| 1697 | test_bit(WriteMostly, &rs->dev[i].rdev.flags)) |
| 1698 | DMEMIT(" write_mostly %u", i); |
| 1699 | |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 1700 | if (_test_flag(CTR_FLAG_MAX_WRITE_BEHIND, rs->ctr_flags)) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1701 | DMEMIT(" max_write_behind %lu", |
| 1702 | rs->md.bitmap_info.max_write_behind); |
| 1703 | |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 1704 | if (_test_flag(CTR_FLAG_STRIPE_CACHE, rs->ctr_flags)) { |
NeilBrown | d1688a6 | 2011-10-11 16:49:52 +1100 | [diff] [blame] | 1705 | struct r5conf *conf = rs->md.private; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1706 | |
| 1707 | /* convert from kiB to sectors */ |
| 1708 | DMEMIT(" stripe_cache %d", |
| 1709 | conf ? conf->max_nr_stripes * 2 : 0); |
| 1710 | } |
| 1711 | |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 1712 | if (_test_flag(CTR_FLAG_REGION_SIZE, rs->ctr_flags)) |
Jonathan Brassow | c108456 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1713 | DMEMIT(" region_size %lu", |
| 1714 | rs->md.bitmap_info.chunksize >> 9); |
| 1715 | |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 1716 | if (_test_flag(CTR_FLAG_RAID10_COPIES, rs->ctr_flags)) |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 1717 | DMEMIT(" raid10_copies %u", |
| 1718 | raid10_md_layout_to_copies(rs->md.layout)); |
| 1719 | |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 1720 | if (_test_flag(CTR_FLAG_RAID10_FORMAT, rs->ctr_flags)) |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 1721 | DMEMIT(" raid10_format %s", |
| 1722 | raid10_md_layout_to_format(rs->md.layout)); |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 1723 | |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1724 | DMEMIT(" %d", rs->md.raid_disks); |
| 1725 | for (i = 0; i < rs->md.raid_disks; i++) { |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1726 | if (rs->dev[i].meta_dev) |
| 1727 | DMEMIT(" %s", rs->dev[i].meta_dev->name); |
| 1728 | else |
| 1729 | DMEMIT(" -"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1730 | |
| 1731 | if (rs->dev[i].data_dev) |
| 1732 | DMEMIT(" %s", rs->dev[i].data_dev->name); |
| 1733 | else |
| 1734 | DMEMIT(" -"); |
| 1735 | } |
| 1736 | } |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1737 | } |
| 1738 | |
Jonathan Brassow | be83651 | 2013-04-24 11:42:43 +1000 | [diff] [blame] | 1739 | static int raid_message(struct dm_target *ti, unsigned argc, char **argv) |
| 1740 | { |
| 1741 | struct raid_set *rs = ti->private; |
| 1742 | struct mddev *mddev = &rs->md; |
| 1743 | |
| 1744 | if (!strcasecmp(argv[0], "reshape")) { |
| 1745 | DMERR("Reshape not supported."); |
| 1746 | return -EINVAL; |
| 1747 | } |
| 1748 | |
| 1749 | if (!mddev->pers || !mddev->pers->sync_request) |
| 1750 | return -EINVAL; |
| 1751 | |
| 1752 | if (!strcasecmp(argv[0], "frozen")) |
| 1753 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
| 1754 | else |
| 1755 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
| 1756 | |
| 1757 | if (!strcasecmp(argv[0], "idle") || !strcasecmp(argv[0], "frozen")) { |
| 1758 | if (mddev->sync_thread) { |
| 1759 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
| 1760 | md_reap_sync_thread(mddev); |
| 1761 | } |
| 1762 | } else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
| 1763 | test_bit(MD_RECOVERY_NEEDED, &mddev->recovery)) |
| 1764 | return -EBUSY; |
| 1765 | else if (!strcasecmp(argv[0], "resync")) |
| 1766 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
| 1767 | else if (!strcasecmp(argv[0], "recover")) { |
| 1768 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
| 1769 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
| 1770 | } else { |
| 1771 | if (!strcasecmp(argv[0], "check")) |
| 1772 | set_bit(MD_RECOVERY_CHECK, &mddev->recovery); |
| 1773 | else if (!!strcasecmp(argv[0], "repair")) |
| 1774 | return -EINVAL; |
| 1775 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
| 1776 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
| 1777 | } |
| 1778 | if (mddev->ro == 2) { |
| 1779 | /* A write to sync_action is enough to justify |
| 1780 | * canceling read-auto mode |
| 1781 | */ |
| 1782 | mddev->ro = 0; |
| 1783 | if (!mddev->suspended) |
| 1784 | md_wakeup_thread(mddev->sync_thread); |
| 1785 | } |
| 1786 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
| 1787 | if (!mddev->suspended) |
| 1788 | md_wakeup_thread(mddev->thread); |
| 1789 | |
| 1790 | return 0; |
| 1791 | } |
| 1792 | |
| 1793 | static int raid_iterate_devices(struct dm_target *ti, |
| 1794 | iterate_devices_callout_fn fn, void *data) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1795 | { |
| 1796 | struct raid_set *rs = ti->private; |
| 1797 | unsigned i; |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1798 | int r = 0; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1799 | |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1800 | for (i = 0; !r && i < rs->md.raid_disks; i++) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1801 | if (rs->dev[i].data_dev) |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1802 | r = fn(ti, |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1803 | rs->dev[i].data_dev, |
| 1804 | 0, /* No offset on data devs */ |
| 1805 | rs->md.dev_sectors, |
| 1806 | data); |
| 1807 | |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1808 | return r; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1809 | } |
| 1810 | |
| 1811 | static void raid_io_hints(struct dm_target *ti, struct queue_limits *limits) |
| 1812 | { |
| 1813 | struct raid_set *rs = ti->private; |
| 1814 | unsigned chunk_size = rs->md.chunk_sectors << 9; |
NeilBrown | d1688a6 | 2011-10-11 16:49:52 +1100 | [diff] [blame] | 1815 | struct r5conf *conf = rs->md.private; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1816 | |
| 1817 | blk_limits_io_min(limits, chunk_size); |
| 1818 | blk_limits_io_opt(limits, chunk_size * (conf->raid_disks - conf->max_degraded)); |
| 1819 | } |
| 1820 | |
| 1821 | static void raid_presuspend(struct dm_target *ti) |
| 1822 | { |
| 1823 | struct raid_set *rs = ti->private; |
| 1824 | |
| 1825 | md_stop_writes(&rs->md); |
| 1826 | } |
| 1827 | |
| 1828 | static void raid_postsuspend(struct dm_target *ti) |
| 1829 | { |
| 1830 | struct raid_set *rs = ti->private; |
| 1831 | |
| 1832 | mddev_suspend(&rs->md); |
| 1833 | } |
| 1834 | |
Jonathan Brassow | f381e71 | 2013-05-08 17:57:13 -0500 | [diff] [blame] | 1835 | static void attempt_restore_of_faulty_devices(struct raid_set *rs) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1836 | { |
Jonathan Brassow | 9092c02 | 2013-05-02 14:19:24 -0500 | [diff] [blame] | 1837 | int i; |
| 1838 | uint64_t failed_devices, cleared_failed_devices = 0; |
| 1839 | unsigned long flags; |
| 1840 | struct dm_raid_superblock *sb; |
Jonathan Brassow | 9092c02 | 2013-05-02 14:19:24 -0500 | [diff] [blame] | 1841 | struct md_rdev *r; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1842 | |
Jonathan Brassow | f381e71 | 2013-05-08 17:57:13 -0500 | [diff] [blame] | 1843 | for (i = 0; i < rs->md.raid_disks; i++) { |
| 1844 | r = &rs->dev[i].rdev; |
| 1845 | if (test_bit(Faulty, &r->flags) && r->sb_page && |
Mike Christie | 796a5cf | 2016-06-05 14:32:07 -0500 | [diff] [blame] | 1846 | sync_page_io(r, 0, r->sb_size, r->sb_page, REQ_OP_READ, 0, |
| 1847 | 1)) { |
Jonathan Brassow | f381e71 | 2013-05-08 17:57:13 -0500 | [diff] [blame] | 1848 | DMINFO("Faulty %s device #%d has readable super block." |
| 1849 | " Attempting to revive it.", |
| 1850 | rs->raid_type->name, i); |
Jonathan Brassow | a4dc163 | 2013-05-08 18:00:54 -0500 | [diff] [blame] | 1851 | |
| 1852 | /* |
| 1853 | * Faulty bit may be set, but sometimes the array can |
| 1854 | * be suspended before the personalities can respond |
| 1855 | * by removing the device from the array (i.e. calling |
| 1856 | * 'hot_remove_disk'). If they haven't yet removed |
| 1857 | * the failed device, its 'raid_disk' number will be |
| 1858 | * '>= 0' - meaning we must call this function |
| 1859 | * ourselves. |
| 1860 | */ |
| 1861 | if ((r->raid_disk >= 0) && |
| 1862 | (r->mddev->pers->hot_remove_disk(r->mddev, r) != 0)) |
| 1863 | /* Failed to revive this device, try next */ |
| 1864 | continue; |
| 1865 | |
Jonathan Brassow | f381e71 | 2013-05-08 17:57:13 -0500 | [diff] [blame] | 1866 | r->raid_disk = i; |
| 1867 | r->saved_raid_disk = i; |
| 1868 | flags = r->flags; |
| 1869 | clear_bit(Faulty, &r->flags); |
| 1870 | clear_bit(WriteErrorSeen, &r->flags); |
| 1871 | clear_bit(In_sync, &r->flags); |
| 1872 | if (r->mddev->pers->hot_add_disk(r->mddev, r)) { |
| 1873 | r->raid_disk = -1; |
| 1874 | r->saved_raid_disk = -1; |
| 1875 | r->flags = flags; |
| 1876 | } else { |
| 1877 | r->recovery_offset = 0; |
| 1878 | cleared_failed_devices |= 1 << i; |
| 1879 | } |
| 1880 | } |
| 1881 | } |
| 1882 | if (cleared_failed_devices) { |
| 1883 | rdev_for_each(r, &rs->md) { |
| 1884 | sb = page_address(r->sb_page); |
| 1885 | failed_devices = le64_to_cpu(sb->failed_devices); |
| 1886 | failed_devices &= ~cleared_failed_devices; |
| 1887 | sb->failed_devices = cpu_to_le64(failed_devices); |
| 1888 | } |
| 1889 | } |
| 1890 | } |
| 1891 | |
| 1892 | static void raid_resume(struct dm_target *ti) |
| 1893 | { |
| 1894 | struct raid_set *rs = ti->private; |
| 1895 | |
Heinz Mauelshagen | 676fa5a | 2016-05-19 18:49:29 +0200 | [diff] [blame^] | 1896 | if (!rt_is_raid0(rs->raid_type)) { |
Heinz Mauelshagen | 0cf4503 | 2015-04-29 14:03:04 +0200 | [diff] [blame] | 1897 | set_bit(MD_CHANGE_DEVS, &rs->md.flags); |
| 1898 | |
| 1899 | if (!rs->bitmap_loaded) { |
| 1900 | bitmap_load(&rs->md); |
| 1901 | rs->bitmap_loaded = 1; |
| 1902 | } else { |
| 1903 | /* |
| 1904 | * A secondary resume while the device is active. |
| 1905 | * Take this opportunity to check whether any failed |
| 1906 | * devices are reachable again. |
| 1907 | */ |
| 1908 | attempt_restore_of_faulty_devices(rs); |
| 1909 | } |
| 1910 | |
| 1911 | clear_bit(MD_RECOVERY_FROZEN, &rs->md.recovery); |
Jonathan Brassow | 47525e5 | 2012-05-22 13:55:29 +1000 | [diff] [blame] | 1912 | } |
Jonathan Brassow | 34f8ac6d | 2012-01-27 14:53:53 -0600 | [diff] [blame] | 1913 | |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1914 | mddev_resume(&rs->md); |
| 1915 | } |
| 1916 | |
| 1917 | static struct target_type raid_target = { |
| 1918 | .name = "raid", |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1919 | .version = {1, 8, 1}, |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1920 | .module = THIS_MODULE, |
| 1921 | .ctr = raid_ctr, |
| 1922 | .dtr = raid_dtr, |
| 1923 | .map = raid_map, |
| 1924 | .status = raid_status, |
Jonathan Brassow | be83651 | 2013-04-24 11:42:43 +1000 | [diff] [blame] | 1925 | .message = raid_message, |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1926 | .iterate_devices = raid_iterate_devices, |
| 1927 | .io_hints = raid_io_hints, |
| 1928 | .presuspend = raid_presuspend, |
| 1929 | .postsuspend = raid_postsuspend, |
| 1930 | .resume = raid_resume, |
| 1931 | }; |
| 1932 | |
| 1933 | static int __init dm_raid_init(void) |
| 1934 | { |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 1935 | DMINFO("Loading target version %u.%u.%u", |
| 1936 | raid_target.version[0], |
| 1937 | raid_target.version[1], |
| 1938 | raid_target.version[2]); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1939 | return dm_register_target(&raid_target); |
| 1940 | } |
| 1941 | |
| 1942 | static void __exit dm_raid_exit(void) |
| 1943 | { |
| 1944 | dm_unregister_target(&raid_target); |
| 1945 | } |
| 1946 | |
| 1947 | module_init(dm_raid_init); |
| 1948 | module_exit(dm_raid_exit); |
| 1949 | |
Heinz Mauelshagen | 48cf06b | 2014-09-24 17:47:19 +0200 | [diff] [blame] | 1950 | module_param(devices_handle_discard_safely, bool, 0644); |
| 1951 | MODULE_PARM_DESC(devices_handle_discard_safely, |
| 1952 | "Set to Y if all devices in each array reliably return zeroes on reads from discarded regions"); |
| 1953 | |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1954 | MODULE_DESCRIPTION(DM_NAME " raid4/5/6 target"); |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 1955 | MODULE_ALIAS("dm-raid1"); |
| 1956 | MODULE_ALIAS("dm-raid10"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1957 | MODULE_ALIAS("dm-raid4"); |
| 1958 | MODULE_ALIAS("dm-raid5"); |
| 1959 | MODULE_ALIAS("dm-raid6"); |
| 1960 | MODULE_AUTHOR("Neil Brown <dm-devel@redhat.com>"); |
| 1961 | MODULE_LICENSE("GPL"); |