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 */ |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 66 | /* New for v1.8.0 */ |
| 67 | #define CTR_FLAG_DELTA_DISKS 0x1000 /* 2 */ /* Only with reshapable raid4/5/6/10! */ |
| 68 | #define CTR_FLAG_DATA_OFFSET 0x2000 /* 2 */ /* Only with reshapable raid4/5/6/10! */ |
| 69 | #define CTR_FLAG_RAID10_USE_NEAR_SETS 0x4000 /* 2 */ /* Only with raid10! */ |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 70 | |
Heinz Mauelshagen | f090279 | 2016-05-19 18:49:27 +0200 | [diff] [blame] | 71 | /* |
| 72 | * Definitions of various constructor flags to |
| 73 | * be used in checks of valid / invalid flags |
| 74 | * per raid level. |
| 75 | */ |
| 76 | /* Define all any sync flags */ |
| 77 | #define CTR_FLAGS_ANY_SYNC (CTR_FLAG_SYNC | CTR_FLAG_NOSYNC) |
| 78 | |
| 79 | /* Define flags for options without argument (e.g. 'nosync') */ |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 80 | #define CTR_FLAG_OPTIONS_NO_ARGS (CTR_FLAGS_ANY_SYNC | \ |
| 81 | CTR_FLAG_RAID10_USE_NEAR_SETS) |
Heinz Mauelshagen | f090279 | 2016-05-19 18:49:27 +0200 | [diff] [blame] | 82 | |
| 83 | /* Define flags for options with one argument (e.g. 'delta_disks +2') */ |
| 84 | #define CTR_FLAG_OPTIONS_ONE_ARG (CTR_FLAG_REBUILD | \ |
| 85 | CTR_FLAG_WRITE_MOSTLY | \ |
| 86 | CTR_FLAG_DAEMON_SLEEP | \ |
| 87 | CTR_FLAG_MIN_RECOVERY_RATE | \ |
| 88 | CTR_FLAG_MAX_RECOVERY_RATE | \ |
| 89 | CTR_FLAG_MAX_WRITE_BEHIND | \ |
| 90 | CTR_FLAG_STRIPE_CACHE | \ |
| 91 | CTR_FLAG_REGION_SIZE | \ |
| 92 | CTR_FLAG_RAID10_COPIES | \ |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 93 | CTR_FLAG_RAID10_FORMAT | \ |
| 94 | CTR_FLAG_DELTA_DISKS | \ |
| 95 | CTR_FLAG_DATA_OFFSET) |
Heinz Mauelshagen | f090279 | 2016-05-19 18:49:27 +0200 | [diff] [blame] | 96 | |
| 97 | /* All ctr optional arguments */ |
| 98 | #define ALL_CTR_FLAGS (CTR_FLAG_OPTIONS_NO_ARGS | \ |
| 99 | CTR_FLAG_OPTIONS_ONE_ARG) |
| 100 | |
| 101 | /* Invalid options definitions per raid level... */ |
| 102 | |
| 103 | /* "raid0" does not accept any options */ |
| 104 | #define RAID0_INVALID_FLAGS ALL_CTR_FLAGS |
| 105 | |
| 106 | /* "raid1" does not accept stripe cache or any raid10 options */ |
| 107 | #define RAID1_INVALID_FLAGS (CTR_FLAG_STRIPE_CACHE | \ |
| 108 | CTR_FLAG_RAID10_COPIES | \ |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 109 | CTR_FLAG_RAID10_FORMAT | \ |
| 110 | CTR_FLAG_DELTA_DISKS | \ |
| 111 | CTR_FLAG_DATA_OFFSET) |
Heinz Mauelshagen | f090279 | 2016-05-19 18:49:27 +0200 | [diff] [blame] | 112 | |
| 113 | /* "raid10" does not accept any raid1 or stripe cache options */ |
| 114 | #define RAID10_INVALID_FLAGS (CTR_FLAG_WRITE_MOSTLY | \ |
| 115 | CTR_FLAG_MAX_WRITE_BEHIND | \ |
| 116 | CTR_FLAG_STRIPE_CACHE) |
| 117 | /* |
| 118 | * "raid4/5/6" do not accept any raid1 or raid10 specific options |
| 119 | * |
| 120 | * "raid6" does not accept "nosync", because it is not guaranteed |
| 121 | * that both parity and q-syndrome are being written properly with |
| 122 | * any writes |
| 123 | */ |
| 124 | #define RAID45_INVALID_FLAGS (CTR_FLAG_WRITE_MOSTLY | \ |
| 125 | CTR_FLAG_MAX_WRITE_BEHIND | \ |
| 126 | CTR_FLAG_RAID10_FORMAT | \ |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 127 | CTR_FLAG_RAID10_COPIES | \ |
| 128 | CTR_FLAG_RAID10_USE_NEAR_SETS) |
Heinz Mauelshagen | f090279 | 2016-05-19 18:49:27 +0200 | [diff] [blame] | 129 | #define RAID6_INVALID_FLAGS (CTR_FLAG_NOSYNC | RAID45_INVALID_FLAGS) |
| 130 | /* ...invalid options definitions per raid level */ |
| 131 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 132 | /* Array elements of 64 bit needed for rebuild/write_mostly bits */ |
| 133 | #define DISKS_ARRAY_ELEMS ((MAX_RAID_DEVICES + (sizeof(uint64_t) * 8 - 1)) / sizeof(uint64_t) / 8) |
| 134 | |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 135 | struct raid_set { |
| 136 | struct dm_target *ti; |
| 137 | |
Jonathan Brassow | 34f8ac6d | 2012-01-27 14:53:53 -0600 | [diff] [blame] | 138 | uint32_t bitmap_loaded; |
Heinz Mauelshagen | c76d53f | 2015-04-29 14:03:00 +0200 | [diff] [blame] | 139 | uint32_t ctr_flags; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 140 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 141 | int raid_disks; |
| 142 | int delta_disks; |
Heinz Mauelshagen | 4763e54 | 2016-05-19 18:49:31 +0200 | [diff] [blame^] | 143 | int data_offset; |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 144 | int raid10_copies; |
| 145 | |
NeilBrown | fd01b88 | 2011-10-11 16:47:53 +1100 | [diff] [blame] | 146 | struct mddev md; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 147 | struct raid_type *raid_type; |
| 148 | struct dm_target_callbacks callbacks; |
| 149 | |
| 150 | struct raid_dev dev[0]; |
| 151 | }; |
| 152 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 153 | /* raid10 algorithms (i.e. formats) */ |
| 154 | #define ALGORITHM_RAID10_DEFAULT 0 |
| 155 | #define ALGORITHM_RAID10_NEAR 1 |
| 156 | #define ALGORITHM_RAID10_OFFSET 2 |
| 157 | #define ALGORITHM_RAID10_FAR 3 |
| 158 | |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 159 | /* Supported raid types and properties. */ |
| 160 | static struct raid_type { |
| 161 | const char *name; /* RAID algorithm. */ |
| 162 | const char *descr; /* Descriptor text for logging. */ |
| 163 | const unsigned parity_devs; /* # of parity devices. */ |
| 164 | const unsigned minimal_devs; /* minimal # of devices in set. */ |
| 165 | const unsigned level; /* RAID level. */ |
| 166 | const unsigned algorithm; /* RAID algorithm. */ |
| 167 | } raid_types[] = { |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 168 | {"raid0", "raid0 (striping)", 0, 2, 0, 0 /* NONE */}, |
| 169 | {"raid1", "raid1 (mirroring)", 0, 2, 1, 0 /* NONE */}, |
| 170 | {"raid10_far", "raid10 far (striped mirrors)", 0, 2, 10, ALGORITHM_RAID10_FAR}, |
| 171 | {"raid10_offset", "raid10 offset (striped mirrors)", 0, 2, 10, ALGORITHM_RAID10_OFFSET}, |
| 172 | {"raid10_near", "raid10 near (striped mirrors)", 0, 2, 10, ALGORITHM_RAID10_NEAR}, |
| 173 | {"raid10", "raid10 (striped mirrors)", 0, 2, 10, ALGORITHM_RAID10_DEFAULT}, |
| 174 | {"raid4", "raid4 (dedicated last parity disk)", 1, 2, 4, ALGORITHM_PARITY_N}, /* raid4 layout = raid5_n */ |
| 175 | {"raid5_n", "raid5 (dedicated last parity disk)", 1, 2, 5, ALGORITHM_PARITY_N}, |
| 176 | {"raid5_ls", "raid5 (left symmetric)", 1, 2, 5, ALGORITHM_LEFT_SYMMETRIC}, |
| 177 | {"raid5_rs", "raid5 (right symmetric)", 1, 2, 5, ALGORITHM_RIGHT_SYMMETRIC}, |
| 178 | {"raid5_la", "raid5 (left asymmetric)", 1, 2, 5, ALGORITHM_LEFT_ASYMMETRIC}, |
| 179 | {"raid5_ra", "raid5 (right asymmetric)", 1, 2, 5, ALGORITHM_RIGHT_ASYMMETRIC}, |
| 180 | {"raid6_zr", "raid6 (zero restart)", 2, 4, 6, ALGORITHM_ROTATING_ZERO_RESTART}, |
| 181 | {"raid6_nr", "raid6 (N restart)", 2, 4, 6, ALGORITHM_ROTATING_N_RESTART}, |
| 182 | {"raid6_nc", "raid6 (N continue)", 2, 4, 6, ALGORITHM_ROTATING_N_CONTINUE}, |
| 183 | {"raid6_n_6", "raid6 (dedicated parity/Q n/6)", 2, 4, 6, ALGORITHM_PARITY_N_6}, |
| 184 | {"raid6_ls_6", "raid6 (left symmetric dedicated Q 6)", 2, 4, 6, ALGORITHM_LEFT_SYMMETRIC_6}, |
| 185 | {"raid6_rs_6", "raid6 (right symmetric dedicated Q 6)", 2, 4, 6, ALGORITHM_RIGHT_SYMMETRIC_6}, |
| 186 | {"raid6_la_6", "raid6 (left asymmetric dedicated Q 6)", 2, 4, 6, ALGORITHM_LEFT_ASYMMETRIC_6}, |
| 187 | {"raid6_ra_6", "raid6 (right asymmetric dedicated Q 6)", 2, 4, 6, ALGORITHM_RIGHT_ASYMMETRIC_6} |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 188 | }; |
| 189 | |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 190 | /* True, if @v is in inclusive range [@min, @max] */ |
| 191 | static bool _in_range(long v, long min, long max) |
| 192 | { |
| 193 | return v >= min && v <= max; |
| 194 | } |
| 195 | |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 196 | /* ctr flag bit manipulation... */ |
| 197 | /* Set single @flag in @flags */ |
| 198 | static void _set_flag(uint32_t flag, uint32_t *flags) |
| 199 | { |
| 200 | WARN_ON_ONCE(hweight32(flag) != 1); |
| 201 | *flags |= flag; |
| 202 | } |
| 203 | |
| 204 | /* Test single @flag in @flags */ |
| 205 | static bool _test_flag(uint32_t flag, uint32_t flags) |
| 206 | { |
| 207 | WARN_ON_ONCE(hweight32(flag) != 1); |
| 208 | return (flag & flags) ? true : false; |
| 209 | } |
| 210 | |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 211 | /* Test multiple @flags in @all_flags */ |
| 212 | static bool _test_flags(uint32_t flags, uint32_t all_flags) |
| 213 | { |
| 214 | return (flags & all_flags) ? true : false; |
| 215 | } |
| 216 | |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 217 | /* Return true if single @flag is set in @*flags, else set it and return false */ |
| 218 | static bool _test_and_set_flag(uint32_t flag, uint32_t *flags) |
| 219 | { |
| 220 | if (_test_flag(flag, *flags)) |
| 221 | return true; |
| 222 | |
| 223 | _set_flag(flag, flags); |
| 224 | return false; |
| 225 | } |
| 226 | /* ...ctr and runtime flag bit manipulation */ |
| 227 | |
| 228 | /* All table line arguments are defined here */ |
| 229 | static struct arg_name_flag { |
| 230 | const uint32_t flag; |
| 231 | const char *name; |
| 232 | } _arg_name_flags[] = { |
| 233 | { CTR_FLAG_SYNC, "sync"}, |
| 234 | { CTR_FLAG_NOSYNC, "nosync"}, |
| 235 | { CTR_FLAG_REBUILD, "rebuild"}, |
| 236 | { CTR_FLAG_DAEMON_SLEEP, "daemon_sleep"}, |
| 237 | { CTR_FLAG_MIN_RECOVERY_RATE, "min_recovery_rate"}, |
| 238 | { CTR_FLAG_MAX_RECOVERY_RATE, "max_recovery_rate"}, |
| 239 | { CTR_FLAG_MAX_WRITE_BEHIND, "max_write_behind"}, |
| 240 | { CTR_FLAG_WRITE_MOSTLY, "writemostly"}, |
| 241 | { CTR_FLAG_STRIPE_CACHE, "stripe_cache"}, |
| 242 | { CTR_FLAG_REGION_SIZE, "region_size"}, |
| 243 | { CTR_FLAG_RAID10_COPIES, "raid10_copies"}, |
| 244 | { CTR_FLAG_RAID10_FORMAT, "raid10_format"}, |
Heinz Mauelshagen | 4763e54 | 2016-05-19 18:49:31 +0200 | [diff] [blame^] | 245 | { CTR_FLAG_DATA_OFFSET, "data_offset"}, |
| 246 | { CTR_FLAG_DELTA_DISKS, "delta_disks"}, |
| 247 | { CTR_FLAG_RAID10_USE_NEAR_SETS, "raid10_use_near_sets"}, |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 248 | }; |
| 249 | |
| 250 | /* Return argument name string for given @flag */ |
| 251 | static const char *_argname_by_flag(const uint32_t flag) |
| 252 | { |
| 253 | if (hweight32(flag) == 1) { |
| 254 | struct arg_name_flag *anf = _arg_name_flags + ARRAY_SIZE(_arg_name_flags); |
| 255 | |
| 256 | while (anf-- > _arg_name_flags) |
| 257 | if (_test_flag(flag, anf->flag)) |
| 258 | return anf->name; |
| 259 | |
| 260 | } else |
| 261 | DMERR("%s called with more than one flag!", __func__); |
| 262 | |
| 263 | return NULL; |
| 264 | } |
| 265 | |
| 266 | /* |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 267 | * bool helpers to test for various raid levels of a raid set, |
| 268 | * is. it's level as reported by the superblock rather than |
| 269 | * the requested raid_type passed to the constructor. |
| 270 | */ |
| 271 | /* Return true, if raid set in @rs is raid0 */ |
| 272 | static bool rs_is_raid0(struct raid_set *rs) |
| 273 | { |
| 274 | return !rs->md.level; |
| 275 | } |
| 276 | |
| 277 | /* Return true, if raid set in @rs is raid10 */ |
| 278 | static bool rs_is_raid10(struct raid_set *rs) |
| 279 | { |
| 280 | return rs->md.level == 10; |
| 281 | } |
| 282 | |
| 283 | /* |
Heinz Mauelshagen | f090279 | 2016-05-19 18:49:27 +0200 | [diff] [blame] | 284 | * bool helpers to test for various raid levels of a raid type |
| 285 | */ |
| 286 | |
| 287 | /* Return true, if raid type in @rt is raid0 */ |
| 288 | static bool rt_is_raid0(struct raid_type *rt) |
| 289 | { |
| 290 | return !rt->level; |
| 291 | } |
| 292 | |
| 293 | /* Return true, if raid type in @rt is raid1 */ |
| 294 | static bool rt_is_raid1(struct raid_type *rt) |
| 295 | { |
| 296 | return rt->level == 1; |
| 297 | } |
| 298 | |
| 299 | /* Return true, if raid type in @rt is raid10 */ |
| 300 | static bool rt_is_raid10(struct raid_type *rt) |
| 301 | { |
| 302 | return rt->level == 10; |
| 303 | } |
| 304 | |
| 305 | /* Return true, if raid type in @rt is raid4/5 */ |
| 306 | static bool rt_is_raid45(struct raid_type *rt) |
| 307 | { |
| 308 | return _in_range(rt->level, 4, 5); |
| 309 | } |
| 310 | |
| 311 | /* Return true, if raid type in @rt is raid6 */ |
| 312 | static bool rt_is_raid6(struct raid_type *rt) |
| 313 | { |
| 314 | return rt->level == 6; |
| 315 | } |
Heinz Mauelshagen | 676fa5a | 2016-05-19 18:49:29 +0200 | [diff] [blame] | 316 | |
| 317 | /* Return true, if raid type in @rt is raid4/5/6 */ |
| 318 | static bool rt_is_raid456(struct raid_type *rt) |
| 319 | { |
| 320 | return _in_range(rt->level, 4, 6); |
| 321 | } |
Heinz Mauelshagen | f090279 | 2016-05-19 18:49:27 +0200 | [diff] [blame] | 322 | /* END: raid level bools */ |
| 323 | |
| 324 | /* |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 325 | * Convenience functions to set ti->error to @errmsg and |
| 326 | * return @r in order to shorten code in a lot of places |
| 327 | */ |
| 328 | static int ti_error_ret(struct dm_target *ti, const char *errmsg, int r) |
| 329 | { |
| 330 | ti->error = (char *) errmsg; |
| 331 | return r; |
| 332 | } |
| 333 | |
| 334 | static int ti_error_einval(struct dm_target *ti, const char *errmsg) |
| 335 | { |
| 336 | return ti_error_ret(ti, errmsg, -EINVAL); |
| 337 | } |
| 338 | /* END: convenience functions to set ti->error to @errmsg... */ |
| 339 | |
Heinz Mauelshagen | f090279 | 2016-05-19 18:49:27 +0200 | [diff] [blame] | 340 | /* Return invalid ctr flags for the raid level of @rs */ |
| 341 | static uint32_t _invalid_flags(struct raid_set *rs) |
| 342 | { |
| 343 | if (rt_is_raid0(rs->raid_type)) |
| 344 | return RAID0_INVALID_FLAGS; |
| 345 | else if (rt_is_raid1(rs->raid_type)) |
| 346 | return RAID1_INVALID_FLAGS; |
| 347 | else if (rt_is_raid10(rs->raid_type)) |
| 348 | return RAID10_INVALID_FLAGS; |
| 349 | else if (rt_is_raid45(rs->raid_type)) |
| 350 | return RAID45_INVALID_FLAGS; |
| 351 | else if (rt_is_raid6(rs->raid_type)) |
| 352 | return RAID6_INVALID_FLAGS; |
| 353 | |
| 354 | return ~0; |
| 355 | } |
| 356 | |
| 357 | /* |
| 358 | * Check for any invalid flags set on @rs defined by bitset @invalid_flags |
| 359 | * |
| 360 | * Has to be called after parsing of the ctr flags! |
| 361 | */ |
| 362 | static int rs_check_for_invalid_flags(struct raid_set *rs) |
| 363 | { |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 364 | if (_test_flags(rs->ctr_flags, _invalid_flags(rs))) |
| 365 | return ti_error_einval(rs->ti, "Invalid flag combined"); |
Heinz Mauelshagen | f090279 | 2016-05-19 18:49:27 +0200 | [diff] [blame] | 366 | |
| 367 | return 0; |
| 368 | } |
| 369 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 370 | |
| 371 | /* MD raid10 bit definitions and helpers */ |
| 372 | #define RAID10_OFFSET (1 << 16) /* stripes with data copies area adjacent on devices */ |
| 373 | #define RAID10_BROCKEN_USE_FAR_SETS (1 << 17) /* Broken in raid10.c: use sets instead of whole stripe rotation */ |
| 374 | #define RAID10_USE_FAR_SETS (1 << 18) /* Use sets instead of whole stripe rotation */ |
| 375 | #define RAID10_FAR_COPIES_SHIFT 8 /* raid10 # far copies shift (2nd byte of layout) */ |
| 376 | |
| 377 | /* Return md raid10 near copies for @layout */ |
| 378 | static unsigned int _raid10_near_copies(int layout) |
| 379 | { |
| 380 | return layout & 0xFF; |
| 381 | } |
| 382 | |
| 383 | /* Return md raid10 far copies for @layout */ |
| 384 | static unsigned int _raid10_far_copies(int layout) |
| 385 | { |
| 386 | return _raid10_near_copies(layout >> RAID10_FAR_COPIES_SHIFT); |
| 387 | } |
| 388 | |
| 389 | /* Return true if md raid10 offset for @layout */ |
| 390 | static unsigned int _is_raid10_offset(int layout) |
| 391 | { |
| 392 | return layout & RAID10_OFFSET; |
| 393 | } |
| 394 | |
| 395 | /* Return true if md raid10 near for @layout */ |
| 396 | static unsigned int _is_raid10_near(int layout) |
| 397 | { |
| 398 | return !_is_raid10_offset(layout) && _raid10_near_copies(layout) > 1; |
| 399 | } |
| 400 | |
| 401 | /* Return true if md raid10 far for @layout */ |
| 402 | static unsigned int _is_raid10_far(int layout) |
| 403 | { |
| 404 | return !_is_raid10_offset(layout) && _raid10_far_copies(layout) > 1; |
| 405 | } |
| 406 | |
| 407 | /* Return md raid10 layout string for @layout */ |
| 408 | static const char *raid10_md_layout_to_format(int layout) |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 409 | { |
| 410 | /* |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 411 | * Bit 16 stands for "offset" |
| 412 | * (i.e. adjacent stripes hold copies) |
| 413 | * |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 414 | * Refer to MD's raid10.c for details |
| 415 | */ |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 416 | if (_is_raid10_offset(layout)) |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 417 | return "offset"; |
| 418 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 419 | if (_raid10_near_copies(layout) > 1) |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 420 | return "near"; |
| 421 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 422 | WARN_ON(_raid10_far_copies(layout) < 2); |
| 423 | |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 424 | return "far"; |
| 425 | } |
| 426 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 427 | /* Return md raid10 algorithm for @name */ |
| 428 | static const int raid10_name_to_format(const char *name) |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 429 | { |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 430 | if (!strcasecmp(name, "near")) |
| 431 | return ALGORITHM_RAID10_NEAR; |
| 432 | else if (!strcasecmp(name, "offset")) |
| 433 | return ALGORITHM_RAID10_OFFSET; |
| 434 | else if (!strcasecmp(name, "far")) |
| 435 | return ALGORITHM_RAID10_FAR; |
| 436 | |
| 437 | return -EINVAL; |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 438 | } |
| 439 | |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 440 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 441 | /* Return md raid10 copies for @layout */ |
| 442 | static unsigned int raid10_md_layout_to_copies(int layout) |
| 443 | { |
| 444 | return _raid10_near_copies(layout) > 1 ? |
| 445 | _raid10_near_copies(layout) : _raid10_far_copies(layout); |
| 446 | } |
| 447 | |
| 448 | /* Return md raid10 format id for @format string */ |
| 449 | static int raid10_format_to_md_layout(struct raid_set *rs, |
| 450 | unsigned int algorithm, |
| 451 | unsigned int copies) |
| 452 | { |
| 453 | unsigned int n = 1, f = 1, r = 0; |
| 454 | |
| 455 | /* |
| 456 | * MD resilienece flaw: |
| 457 | * |
| 458 | * enabling use_far_sets for far/offset formats causes copies |
| 459 | * to be colocated on the same devs together with their origins! |
| 460 | * |
| 461 | * -> disable it for now in the definition above |
| 462 | */ |
| 463 | if (algorithm == ALGORITHM_RAID10_DEFAULT || |
| 464 | algorithm == ALGORITHM_RAID10_NEAR) |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 465 | n = copies; |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 466 | |
| 467 | else if (algorithm == ALGORITHM_RAID10_OFFSET) { |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 468 | f = copies; |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 469 | r = RAID10_OFFSET; |
| 470 | if (!_test_flag(CTR_FLAG_RAID10_USE_NEAR_SETS, rs->ctr_flags)) |
| 471 | r |= RAID10_USE_FAR_SETS; |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 472 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 473 | } else if (algorithm == ALGORITHM_RAID10_FAR) { |
| 474 | f = copies; |
| 475 | r = !RAID10_OFFSET; |
| 476 | if (!_test_flag(CTR_FLAG_RAID10_USE_NEAR_SETS, rs->ctr_flags)) |
| 477 | r |= RAID10_USE_FAR_SETS; |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 478 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 479 | } else |
| 480 | return -EINVAL; |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 481 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 482 | return r | (f << RAID10_FAR_COPIES_SHIFT) | n; |
| 483 | } |
| 484 | /* END: MD raid10 bit definitions and helpers */ |
| 485 | |
| 486 | /* Check for any of the raid10 algorithms */ |
| 487 | static int _got_raid10(struct raid_type *rtp, const int layout) |
| 488 | { |
| 489 | if (rtp->level == 10) { |
| 490 | switch (rtp->algorithm) { |
| 491 | case ALGORITHM_RAID10_DEFAULT: |
| 492 | case ALGORITHM_RAID10_NEAR: |
| 493 | return _is_raid10_near(layout); |
| 494 | case ALGORITHM_RAID10_OFFSET: |
| 495 | return _is_raid10_offset(layout); |
| 496 | case ALGORITHM_RAID10_FAR: |
| 497 | return _is_raid10_far(layout); |
| 498 | default: |
| 499 | break; |
| 500 | } |
| 501 | } |
| 502 | |
| 503 | return 0; |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 504 | } |
| 505 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 506 | /* Return raid_type for @name */ |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 507 | static struct raid_type *get_raid_type(const char *name) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 508 | { |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 509 | struct raid_type *rtp = raid_types + ARRAY_SIZE(raid_types); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 510 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 511 | while (rtp-- > raid_types) |
| 512 | if (!strcasecmp(rtp->name, name)) |
| 513 | return rtp; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 514 | |
| 515 | return NULL; |
| 516 | } |
| 517 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 518 | /* Return raid_type for @name based derived from @level and @layout */ |
| 519 | static struct raid_type *get_raid_type_by_ll(const int level, const int layout) |
| 520 | { |
| 521 | struct raid_type *rtp = raid_types + ARRAY_SIZE(raid_types); |
| 522 | |
| 523 | while (rtp-- > raid_types) { |
| 524 | /* RAID10 special checks based on @layout flags/properties */ |
| 525 | if (rtp->level == level && |
| 526 | (_got_raid10(rtp, layout) || rtp->algorithm == layout)) |
| 527 | return rtp; |
| 528 | } |
| 529 | |
| 530 | return NULL; |
| 531 | } |
| 532 | |
| 533 | /* |
| 534 | * Set the mddev properties in @rs to the new |
| 535 | * ones requested by the ctr |
| 536 | */ |
| 537 | static void rs_set_new(struct raid_set *rs) |
| 538 | { |
| 539 | struct mddev *mddev = &rs->md; |
| 540 | |
| 541 | mddev->level = mddev->new_level; |
| 542 | mddev->layout = mddev->new_layout; |
| 543 | mddev->chunk_sectors = mddev->new_chunk_sectors; |
| 544 | mddev->delta_disks = 0; |
| 545 | } |
| 546 | |
| 547 | |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 548 | static struct raid_set *context_alloc(struct dm_target *ti, struct raid_type *raid_type, unsigned raid_devs) |
| 549 | { |
| 550 | unsigned i; |
| 551 | struct raid_set *rs; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 552 | |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 553 | if (raid_devs <= raid_type->parity_devs) |
| 554 | return ERR_PTR(ti_error_einval(ti, "Insufficient number of devices")); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 555 | |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 556 | rs = kzalloc(sizeof(*rs) + raid_devs * sizeof(rs->dev[0]), GFP_KERNEL); |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 557 | if (!rs) |
| 558 | return ERR_PTR(ti_error_ret(ti, "Cannot allocate raid context", -ENOMEM)); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 559 | |
| 560 | mddev_init(&rs->md); |
| 561 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 562 | rs->raid_disks = raid_devs; |
| 563 | rs->delta_disks = 0; |
| 564 | |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 565 | rs->ti = ti; |
| 566 | rs->raid_type = raid_type; |
| 567 | rs->md.raid_disks = raid_devs; |
| 568 | rs->md.level = raid_type->level; |
| 569 | rs->md.new_level = rs->md.level; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 570 | rs->md.layout = raid_type->algorithm; |
| 571 | rs->md.new_layout = rs->md.layout; |
| 572 | rs->md.delta_disks = 0; |
| 573 | rs->md.recovery_cp = 0; |
| 574 | |
| 575 | for (i = 0; i < raid_devs; i++) |
| 576 | md_rdev_init(&rs->dev[i].rdev); |
| 577 | |
| 578 | /* |
| 579 | * Remaining items to be initialized by further RAID params: |
| 580 | * rs->md.persistent |
| 581 | * rs->md.external |
| 582 | * rs->md.chunk_sectors |
| 583 | * rs->md.new_chunk_sectors |
Jonathan E Brassow | c039c33 | 2012-07-27 15:08:04 +0100 | [diff] [blame] | 584 | * rs->md.dev_sectors |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 585 | */ |
| 586 | |
| 587 | return rs; |
| 588 | } |
| 589 | |
| 590 | static void context_free(struct raid_set *rs) |
| 591 | { |
| 592 | int i; |
| 593 | |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 594 | for (i = 0; i < rs->md.raid_disks; i++) { |
| 595 | if (rs->dev[i].meta_dev) |
| 596 | dm_put_device(rs->ti, rs->dev[i].meta_dev); |
NeilBrown | 545c879 | 2012-05-22 13:54:30 +1000 | [diff] [blame] | 597 | md_rdev_clear(&rs->dev[i].rdev); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 598 | if (rs->dev[i].data_dev) |
| 599 | dm_put_device(rs->ti, rs->dev[i].data_dev); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 600 | } |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 601 | |
| 602 | kfree(rs); |
| 603 | } |
| 604 | |
| 605 | /* |
| 606 | * For every device we have two words |
| 607 | * <meta_dev>: meta device name or '-' if missing |
| 608 | * <data_dev>: data device name or '-' if missing |
| 609 | * |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 610 | * The following are permitted: |
| 611 | * - - |
| 612 | * - <data_dev> |
| 613 | * <meta_dev> <data_dev> |
| 614 | * |
| 615 | * The following is not allowed: |
| 616 | * <meta_dev> - |
| 617 | * |
| 618 | * This code parses those words. If there is a failure, |
| 619 | * the caller must use context_free to unwind the operations. |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 620 | */ |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 621 | 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] | 622 | { |
| 623 | int i; |
| 624 | int rebuild = 0; |
| 625 | int metadata_available = 0; |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 626 | int r = 0; |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 627 | const char *arg; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 628 | |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 629 | /* Put off the number of raid devices argument to get to dev pairs */ |
| 630 | arg = dm_shift_arg(as); |
| 631 | if (!arg) |
| 632 | return -EINVAL; |
| 633 | |
| 634 | for (i = 0; i < rs->md.raid_disks; i++) { |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 635 | rs->dev[i].rdev.raid_disk = i; |
| 636 | |
| 637 | rs->dev[i].meta_dev = NULL; |
| 638 | rs->dev[i].data_dev = NULL; |
| 639 | |
| 640 | /* |
| 641 | * There are no offsets, since there is a separate device |
| 642 | * for data and metadata. |
| 643 | */ |
| 644 | rs->dev[i].rdev.data_offset = 0; |
| 645 | rs->dev[i].rdev.mddev = &rs->md; |
| 646 | |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 647 | arg = dm_shift_arg(as); |
| 648 | if (!arg) |
| 649 | return -EINVAL; |
| 650 | |
| 651 | if (strcmp(arg, "-")) { |
| 652 | r = dm_get_device(rs->ti, arg, |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 653 | dm_table_get_mode(rs->ti->table), |
| 654 | &rs->dev[i].meta_dev); |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 655 | if (r) |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 656 | return ti_error_ret(rs->ti, "RAID metadata device lookup failure", r); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 657 | |
| 658 | rs->dev[i].rdev.sb_page = alloc_page(GFP_KERNEL); |
| 659 | if (!rs->dev[i].rdev.sb_page) |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 660 | return ti_error_ret(rs->ti, "Failed to allocate superblock page", -ENOMEM); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 661 | } |
| 662 | |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 663 | arg = dm_shift_arg(as); |
| 664 | if (!arg) |
| 665 | return -EINVAL; |
| 666 | |
| 667 | if (!strcmp(arg, "-")) { |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 668 | if (!test_bit(In_sync, &rs->dev[i].rdev.flags) && |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 669 | (!rs->dev[i].rdev.recovery_offset)) |
| 670 | return ti_error_einval(rs->ti, "Drive designated for rebuild not specified"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 671 | |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 672 | if (rs->dev[i].meta_dev) |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 673 | 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] | 674 | |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 675 | continue; |
| 676 | } |
| 677 | |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 678 | r = dm_get_device(rs->ti, arg, |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 679 | dm_table_get_mode(rs->ti->table), |
| 680 | &rs->dev[i].data_dev); |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 681 | if (r) |
| 682 | return ti_error_ret(rs->ti, "RAID device lookup failure", r); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 683 | |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 684 | if (rs->dev[i].meta_dev) { |
| 685 | metadata_available = 1; |
| 686 | rs->dev[i].rdev.meta_bdev = rs->dev[i].meta_dev->bdev; |
| 687 | } |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 688 | rs->dev[i].rdev.bdev = rs->dev[i].data_dev->bdev; |
| 689 | list_add(&rs->dev[i].rdev.same_set, &rs->md.disks); |
| 690 | if (!test_bit(In_sync, &rs->dev[i].rdev.flags)) |
| 691 | rebuild++; |
| 692 | } |
| 693 | |
| 694 | if (metadata_available) { |
| 695 | rs->md.external = 0; |
| 696 | rs->md.persistent = 1; |
| 697 | rs->md.major_version = 2; |
| 698 | } else if (rebuild && !rs->md.recovery_cp) { |
| 699 | /* |
| 700 | * Without metadata, we will not be able to tell if the array |
| 701 | * is in-sync or not - we must assume it is not. Therefore, |
| 702 | * it is impossible to rebuild a drive. |
| 703 | * |
| 704 | * Even if there is metadata, the on-disk information may |
| 705 | * indicate that the array is not in-sync and it will then |
| 706 | * fail at that time. |
| 707 | * |
| 708 | * User could specify 'nosync' option if desperate. |
| 709 | */ |
| 710 | DMERR("Unable to rebuild drive while array is not in-sync"); |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 711 | 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] | 712 | } |
| 713 | |
| 714 | return 0; |
| 715 | } |
| 716 | |
| 717 | /* |
Jonathan Brassow | c108456 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 718 | * validate_region_size |
| 719 | * @rs |
| 720 | * @region_size: region size in sectors. If 0, pick a size (4MiB default). |
| 721 | * |
| 722 | * Set rs->md.bitmap_info.chunksize (which really refers to 'region size'). |
| 723 | * Ensure that (ti->len/region_size < 2^21) - required by MD bitmap. |
| 724 | * |
| 725 | * Returns: 0 on success, -EINVAL on failure. |
| 726 | */ |
| 727 | static int validate_region_size(struct raid_set *rs, unsigned long region_size) |
| 728 | { |
| 729 | unsigned long min_region_size = rs->ti->len / (1 << 21); |
| 730 | |
| 731 | if (!region_size) { |
| 732 | /* |
| 733 | * Choose a reasonable default. All figures in sectors. |
| 734 | */ |
| 735 | if (min_region_size > (1 << 13)) { |
Jonathan Brassow | 3a0f9aa | 2012-12-21 20:23:33 +0000 | [diff] [blame] | 736 | /* 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] | 737 | region_size = roundup_pow_of_two(min_region_size); |
Jonathan Brassow | c108456 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 738 | DMINFO("Choosing default region size of %lu sectors", |
| 739 | region_size); |
Jonathan Brassow | c108456 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 740 | } else { |
| 741 | DMINFO("Choosing default region size of 4MiB"); |
| 742 | region_size = 1 << 13; /* sectors */ |
| 743 | } |
| 744 | } else { |
| 745 | /* |
| 746 | * Validate user-supplied value. |
| 747 | */ |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 748 | if (region_size > rs->ti->len) |
| 749 | return ti_error_einval(rs->ti, "Supplied region size is too large"); |
Jonathan Brassow | c108456 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 750 | |
| 751 | if (region_size < min_region_size) { |
| 752 | DMERR("Supplied region_size (%lu sectors) below minimum (%lu)", |
| 753 | region_size, min_region_size); |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 754 | return ti_error_einval(rs->ti, "Supplied region size is too small"); |
Jonathan Brassow | c108456 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 755 | } |
| 756 | |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 757 | if (!is_power_of_2(region_size)) |
| 758 | 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] | 759 | |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 760 | if (region_size < rs->md.chunk_sectors) |
| 761 | 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] | 762 | } |
| 763 | |
| 764 | /* |
| 765 | * Convert sectors to bytes. |
| 766 | */ |
| 767 | rs->md.bitmap_info.chunksize = (region_size << 9); |
| 768 | |
| 769 | return 0; |
| 770 | } |
| 771 | |
| 772 | /* |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 773 | * validate_raid_redundancy |
Jonathan Brassow | eb64912 | 2012-10-11 13:40:09 +1100 | [diff] [blame] | 774 | * @rs |
| 775 | * |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 776 | * Determine if there are enough devices in the array that haven't |
| 777 | * failed (or are being rebuilt) to form a usable array. |
Jonathan Brassow | eb64912 | 2012-10-11 13:40:09 +1100 | [diff] [blame] | 778 | * |
| 779 | * Returns: 0 on success, -EINVAL on failure. |
| 780 | */ |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 781 | static int validate_raid_redundancy(struct raid_set *rs) |
Jonathan Brassow | eb64912 | 2012-10-11 13:40:09 +1100 | [diff] [blame] | 782 | { |
| 783 | unsigned i, rebuild_cnt = 0; |
NeilBrown | 3f6bbd3 | 2013-05-09 10:27:49 +1000 | [diff] [blame] | 784 | unsigned rebuilds_per_group = 0, copies, d; |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 785 | unsigned group_size, last_group_start; |
Jonathan Brassow | eb64912 | 2012-10-11 13:40:09 +1100 | [diff] [blame] | 786 | |
Jonathan Brassow | eb64912 | 2012-10-11 13:40:09 +1100 | [diff] [blame] | 787 | for (i = 0; i < rs->md.raid_disks; i++) |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 788 | if (!test_bit(In_sync, &rs->dev[i].rdev.flags) || |
| 789 | !rs->dev[i].rdev.sb_page) |
Jonathan Brassow | eb64912 | 2012-10-11 13:40:09 +1100 | [diff] [blame] | 790 | rebuild_cnt++; |
| 791 | |
| 792 | switch (rs->raid_type->level) { |
| 793 | case 1: |
| 794 | if (rebuild_cnt >= rs->md.raid_disks) |
| 795 | goto too_many; |
| 796 | break; |
| 797 | case 4: |
| 798 | case 5: |
| 799 | case 6: |
| 800 | if (rebuild_cnt > rs->raid_type->parity_devs) |
| 801 | goto too_many; |
| 802 | break; |
| 803 | case 10: |
Jonathan Brassow | 4ec1e36 | 2012-10-11 13:40:24 +1100 | [diff] [blame] | 804 | copies = raid10_md_layout_to_copies(rs->md.layout); |
| 805 | if (rebuild_cnt < copies) |
| 806 | break; |
| 807 | |
| 808 | /* |
| 809 | * It is possible to have a higher rebuild count for RAID10, |
| 810 | * as long as the failed devices occur in different mirror |
| 811 | * groups (i.e. different stripes). |
| 812 | * |
Jonathan Brassow | 4ec1e36 | 2012-10-11 13:40:24 +1100 | [diff] [blame] | 813 | * When checking "near" format, make sure no adjacent devices |
| 814 | * have failed beyond what can be handled. In addition to the |
| 815 | * simple case where the number of devices is a multiple of the |
| 816 | * number of copies, we must also handle cases where the number |
| 817 | * of devices is not a multiple of the number of copies. |
| 818 | * E.g. dev1 dev2 dev3 dev4 dev5 |
| 819 | * A A B B C |
| 820 | * C D D E E |
| 821 | */ |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 822 | if (!strcmp("near", raid10_md_layout_to_format(rs->md.layout))) { |
| 823 | for (i = 0; i < rs->md.raid_disks * copies; i++) { |
| 824 | if (!(i % copies)) |
| 825 | rebuilds_per_group = 0; |
| 826 | d = i % rs->md.raid_disks; |
| 827 | if ((!rs->dev[d].rdev.sb_page || |
| 828 | !test_bit(In_sync, &rs->dev[d].rdev.flags)) && |
| 829 | (++rebuilds_per_group >= copies)) |
| 830 | goto too_many; |
| 831 | } |
| 832 | break; |
| 833 | } |
| 834 | |
| 835 | /* |
| 836 | * When checking "far" and "offset" formats, we need to ensure |
| 837 | * that the device that holds its copy is not also dead or |
| 838 | * being rebuilt. (Note that "far" and "offset" formats only |
| 839 | * support two copies right now. These formats also only ever |
| 840 | * use the 'use_far_sets' variant.) |
| 841 | * |
| 842 | * This check is somewhat complicated by the need to account |
| 843 | * for arrays that are not a multiple of (far) copies. This |
| 844 | * results in the need to treat the last (potentially larger) |
| 845 | * set differently. |
| 846 | */ |
| 847 | group_size = (rs->md.raid_disks / copies); |
| 848 | last_group_start = (rs->md.raid_disks / group_size) - 1; |
| 849 | last_group_start *= group_size; |
| 850 | for (i = 0; i < rs->md.raid_disks; i++) { |
| 851 | if (!(i % copies) && !(i > last_group_start)) |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 852 | rebuilds_per_group = 0; |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 853 | if ((!rs->dev[i].rdev.sb_page || |
| 854 | !test_bit(In_sync, &rs->dev[i].rdev.flags)) && |
Jonathan Brassow | 4ec1e36 | 2012-10-11 13:40:24 +1100 | [diff] [blame] | 855 | (++rebuilds_per_group >= copies)) |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 856 | goto too_many; |
Jonathan Brassow | 4ec1e36 | 2012-10-11 13:40:24 +1100 | [diff] [blame] | 857 | } |
| 858 | break; |
Jonathan Brassow | eb64912 | 2012-10-11 13:40:09 +1100 | [diff] [blame] | 859 | default: |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 860 | if (rebuild_cnt) |
| 861 | return -EINVAL; |
Jonathan Brassow | eb64912 | 2012-10-11 13:40:09 +1100 | [diff] [blame] | 862 | } |
| 863 | |
| 864 | return 0; |
| 865 | |
| 866 | too_many: |
Jonathan Brassow | eb64912 | 2012-10-11 13:40:09 +1100 | [diff] [blame] | 867 | return -EINVAL; |
| 868 | } |
| 869 | |
| 870 | /* |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 871 | * Possible arguments are... |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 872 | * <chunk_size> [optional_args] |
| 873 | * |
Jonathan Brassow | 3273727 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 874 | * Argument definitions |
| 875 | * <chunk_size> The number of sectors per disk that |
| 876 | * will form the "stripe" |
| 877 | * [[no]sync] Force or prevent recovery of the |
| 878 | * entire array |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 879 | * [rebuild <idx>] Rebuild the drive indicated by the index |
Jonathan Brassow | 3273727 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 880 | * [daemon_sleep <ms>] Time between bitmap daemon work to |
| 881 | * clear bits |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 882 | * [min_recovery_rate <kB/sec/disk>] Throttle RAID initialization |
| 883 | * [max_recovery_rate <kB/sec/disk>] Throttle RAID initialization |
Jonathan Brassow | 46bed2b | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 884 | * [write_mostly <idx>] Indicate a write mostly drive via index |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 885 | * [max_write_behind <sectors>] See '-write-behind=' (man mdadm) |
| 886 | * [stripe_cache <sectors>] Stripe cache size for higher RAIDs |
Jonathan Brassow | c108456 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 887 | * [region_size <sectors>] Defines granularity of bitmap |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 888 | * |
| 889 | * RAID10-only options: |
| 890 | * [raid10_copies <# copies>] Number of copies. (Default: 2) |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 891 | * [raid10_format <near|far|offset>] Layout algorithm. (Default: near) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 892 | */ |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 893 | 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] | 894 | unsigned num_raid_params) |
| 895 | { |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 896 | int raid10_format = ALGORITHM_RAID10_DEFAULT; |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 897 | unsigned raid10_copies = 2; |
Jonathan Brassow | eb64912 | 2012-10-11 13:40:09 +1100 | [diff] [blame] | 898 | unsigned i; |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 899 | unsigned value, region_size = 0; |
Jonathan E Brassow | c039c33 | 2012-07-27 15:08:04 +0100 | [diff] [blame] | 900 | sector_t sectors_per_dev = rs->ti->len; |
Mike Snitzer | 542f903 | 2012-07-27 15:08:00 +0100 | [diff] [blame] | 901 | sector_t max_io_len; |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 902 | const char *arg, *key; |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 903 | struct raid_dev *rd; |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 904 | struct raid_type *rt = rs->raid_type; |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 905 | |
| 906 | arg = dm_shift_arg(as); |
| 907 | num_raid_params--; /* Account for chunk_size argument */ |
| 908 | |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 909 | if (kstrtouint(arg, 10, &value) < 0) |
| 910 | return ti_error_einval(rs->ti, "Bad numerical argument given for chunk_size"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 911 | |
| 912 | /* |
| 913 | * First, parse the in-order required arguments |
Jonathan Brassow | 3273727 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 914 | * "chunk_size" is the only argument of this type. |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 915 | */ |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 916 | if (rt_is_raid1(rt)) { |
Jonathan Brassow | 3273727 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 917 | if (value) |
| 918 | DMERR("Ignoring chunk size parameter for RAID 1"); |
| 919 | value = 0; |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 920 | } else if (!is_power_of_2(value)) |
| 921 | return ti_error_einval(rs->ti, "Chunk size must be a power of 2"); |
| 922 | else if (value < 8) |
| 923 | return ti_error_einval(rs->ti, "Chunk size value is too small"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 924 | |
| 925 | rs->md.new_chunk_sectors = rs->md.chunk_sectors = value; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 926 | |
| 927 | /* |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 928 | * We set each individual device as In_sync with a completed |
| 929 | * 'recovery_offset'. If there has been a device failure or |
| 930 | * replacement then one of the following cases applies: |
| 931 | * |
| 932 | * 1) User specifies 'rebuild'. |
| 933 | * - Device is reset when param is read. |
| 934 | * 2) A new device is supplied. |
| 935 | * - No matching superblock found, resets device. |
| 936 | * 3) Device failure was transient and returns on reload. |
| 937 | * - Failure noticed, resets device for bitmap replay. |
| 938 | * 4) Device hadn't completed recovery after previous failure. |
| 939 | * - Superblock is read and overrides recovery_offset. |
| 940 | * |
| 941 | * What is found in the superblocks of the devices is always |
| 942 | * authoritative, unless 'rebuild' or '[no]sync' was specified. |
| 943 | */ |
| 944 | for (i = 0; i < rs->md.raid_disks; i++) { |
| 945 | set_bit(In_sync, &rs->dev[i].rdev.flags); |
| 946 | rs->dev[i].rdev.recovery_offset = MaxSector; |
| 947 | } |
| 948 | |
| 949 | /* |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 950 | * Second, parse the unordered optional arguments |
| 951 | */ |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 952 | for (i = 0; i < num_raid_params; i++) { |
Heinz Mauelshagen | 4763e54 | 2016-05-19 18:49:31 +0200 | [diff] [blame^] | 953 | key = dm_shift_arg(as); |
| 954 | if (!key) |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 955 | return ti_error_einval(rs->ti, "Not enough raid parameters given"); |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 956 | |
Heinz Mauelshagen | 4763e54 | 2016-05-19 18:49:31 +0200 | [diff] [blame^] | 957 | if (!strcasecmp(key, _argname_by_flag(CTR_FLAG_NOSYNC))) { |
| 958 | if (_test_and_set_flag(CTR_FLAG_NOSYNC, &rs->ctr_flags)) |
| 959 | return ti_error_einval(rs->ti, "Only one 'nosync' argument allowed"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 960 | rs->md.recovery_cp = MaxSector; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 961 | continue; |
| 962 | } |
Heinz Mauelshagen | 4763e54 | 2016-05-19 18:49:31 +0200 | [diff] [blame^] | 963 | if (!strcasecmp(key, _argname_by_flag(CTR_FLAG_SYNC))) { |
| 964 | if (_test_and_set_flag(CTR_FLAG_SYNC, &rs->ctr_flags)) |
| 965 | return ti_error_einval(rs->ti, "Only one 'sync' argument allowed"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 966 | rs->md.recovery_cp = 0; |
Heinz Mauelshagen | 4763e54 | 2016-05-19 18:49:31 +0200 | [diff] [blame^] | 967 | continue; |
| 968 | } |
| 969 | if (!strcasecmp(key, _argname_by_flag(CTR_FLAG_RAID10_USE_NEAR_SETS))) { |
| 970 | if (_test_and_set_flag(CTR_FLAG_RAID10_USE_NEAR_SETS, &rs->ctr_flags)) |
| 971 | return ti_error_einval(rs->ti, "Only one 'raid10_use_new_sets' argument allowed"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 972 | continue; |
| 973 | } |
| 974 | |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 975 | arg = dm_shift_arg(as); |
| 976 | i++; /* Account for the argument pairs */ |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 977 | if (!arg) |
| 978 | return ti_error_einval(rs->ti, "Wrong number of raid parameters given"); |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 979 | |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 980 | /* |
| 981 | * Parameters that take a string value are checked here. |
| 982 | */ |
| 983 | |
| 984 | if (!strcasecmp(key, _argname_by_flag(CTR_FLAG_RAID10_FORMAT))) { |
| 985 | if (_test_and_set_flag(CTR_FLAG_RAID10_FORMAT, &rs->ctr_flags)) |
Heinz Mauelshagen | 4763e54 | 2016-05-19 18:49:31 +0200 | [diff] [blame^] | 986 | return ti_error_einval(rs->ti, "Only one 'raid10_format' argument pair allowed"); |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 987 | if (!rt_is_raid10(rt)) |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 988 | return ti_error_einval(rs->ti, "'raid10_format' is an invalid parameter for this RAID type"); |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 989 | raid10_format = raid10_name_to_format(arg); |
| 990 | if (raid10_format < 0) |
| 991 | return ti_error_ret(rs->ti, "Invalid 'raid10_format' value given", raid10_format); |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 992 | continue; |
| 993 | } |
| 994 | |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 995 | if (kstrtouint(arg, 10, &value) < 0) |
| 996 | return ti_error_einval(rs->ti, "Bad numerical argument given in raid params"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 997 | |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 998 | if (!strcasecmp(key, _argname_by_flag(CTR_FLAG_REBUILD))) { |
| 999 | /* |
| 1000 | * "rebuild" is being passed in by userspace to provide |
| 1001 | * indexes of replaced devices and to set up additional |
| 1002 | * devices on raid level takeover. |
| 1003 | */ |
| 1004 | if (!_in_range(value, 0, rs->md.raid_disks - 1)) |
| 1005 | return ti_error_einval(rs->ti, "Invalid rebuild index given"); |
| 1006 | |
| 1007 | rd = rs->dev + value; |
| 1008 | clear_bit(In_sync, &rd->rdev.flags); |
| 1009 | clear_bit(Faulty, &rd->rdev.flags); |
| 1010 | rd->rdev.recovery_offset = 0; |
| 1011 | _set_flag(CTR_FLAG_REBUILD, &rs->ctr_flags); |
| 1012 | } else if (!strcasecmp(key, _argname_by_flag(CTR_FLAG_WRITE_MOSTLY))) { |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1013 | if (!rt_is_raid1(rt)) |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1014 | return ti_error_einval(rs->ti, "write_mostly option is only valid for RAID1"); |
| 1015 | |
| 1016 | if (!_in_range(value, 0, rs->md.raid_disks - 1)) |
| 1017 | return ti_error_einval(rs->ti, "Invalid write_mostly index given"); |
| 1018 | |
Jonathan Brassow | 46bed2b | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1019 | set_bit(WriteMostly, &rs->dev[value].rdev.flags); |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1020 | _set_flag(CTR_FLAG_WRITE_MOSTLY, &rs->ctr_flags); |
| 1021 | } else if (!strcasecmp(key, _argname_by_flag(CTR_FLAG_MAX_WRITE_BEHIND))) { |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1022 | if (!rt_is_raid1(rt)) |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1023 | return ti_error_einval(rs->ti, "max_write_behind option is only valid for RAID1"); |
| 1024 | |
| 1025 | if (_test_and_set_flag(CTR_FLAG_MAX_WRITE_BEHIND, &rs->ctr_flags)) |
| 1026 | 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] | 1027 | |
| 1028 | /* |
| 1029 | * In device-mapper, we specify things in sectors, but |
| 1030 | * MD records this value in kB |
| 1031 | */ |
| 1032 | value /= 2; |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1033 | if (value > COUNTER_MAX) |
| 1034 | return ti_error_einval(rs->ti, "Max write-behind limit out of range"); |
| 1035 | |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1036 | rs->md.bitmap_info.max_write_behind = value; |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1037 | } else if (!strcasecmp(key, _argname_by_flag(CTR_FLAG_DAEMON_SLEEP))) { |
| 1038 | if (_test_and_set_flag(CTR_FLAG_DAEMON_SLEEP, &rs->ctr_flags)) |
| 1039 | return ti_error_einval(rs->ti, "Only one daemon_sleep argument pair allowed"); |
| 1040 | if (!value || (value > MAX_SCHEDULE_TIMEOUT)) |
| 1041 | return ti_error_einval(rs->ti, "daemon sleep period out of range"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1042 | rs->md.bitmap_info.daemon_sleep = value; |
Heinz Mauelshagen | 4763e54 | 2016-05-19 18:49:31 +0200 | [diff] [blame^] | 1043 | } else if (!strcasecmp(key, _argname_by_flag(CTR_FLAG_DATA_OFFSET))) { |
| 1044 | /* Userspace passes new data_offset after having extended the the data image LV */ |
| 1045 | if (_test_and_set_flag(CTR_FLAG_DATA_OFFSET, &rs->ctr_flags)) |
| 1046 | return ti_error_einval(rs->ti, "Only one data_offset argument pair allowed"); |
| 1047 | |
| 1048 | /* Ensure sensible data offset */ |
| 1049 | if (value < 0) |
| 1050 | return ti_error_einval(rs->ti, "Bogus data_offset value"); |
| 1051 | |
| 1052 | rs->data_offset = value; |
| 1053 | } else if (!strcasecmp(key, _argname_by_flag(CTR_FLAG_DELTA_DISKS))) { |
| 1054 | /* Define the +/-# of disks to add to/remove from the given raid set */ |
| 1055 | if (_test_and_set_flag(CTR_FLAG_DELTA_DISKS, &rs->ctr_flags)) |
| 1056 | return ti_error_einval(rs->ti, "Only one delta_disks argument pair allowed"); |
| 1057 | |
| 1058 | /* Ensure MAX_RAID_DEVICES and raid type minimal_devs! */ |
| 1059 | if (!_in_range(abs(value), 1, MAX_RAID_DEVICES - rt->minimal_devs)) |
| 1060 | return ti_error_einval(rs->ti, "Too many delta_disk requested"); |
| 1061 | |
| 1062 | rs->delta_disks = value; |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1063 | } else if (!strcasecmp(key, _argname_by_flag(CTR_FLAG_STRIPE_CACHE))) { |
| 1064 | if (_test_and_set_flag(CTR_FLAG_STRIPE_CACHE, &rs->ctr_flags)) |
| 1065 | return ti_error_einval(rs->ti, "Only one stripe_cache argument pair allowed"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1066 | /* |
| 1067 | * In device-mapper, we specify things in sectors, but |
| 1068 | * MD records this value in kB |
| 1069 | */ |
| 1070 | value /= 2; |
| 1071 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1072 | if (!rt_is_raid456(rt)) |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1073 | return ti_error_einval(rs->ti, "Inappropriate argument: stripe_cache"); |
| 1074 | if (raid5_set_cache_size(&rs->md, (int)value)) |
| 1075 | return ti_error_einval(rs->ti, "Bad stripe_cache size"); |
| 1076 | |
| 1077 | } else if (!strcasecmp(key, _argname_by_flag(CTR_FLAG_MIN_RECOVERY_RATE))) { |
| 1078 | if (_test_and_set_flag(CTR_FLAG_MIN_RECOVERY_RATE, &rs->ctr_flags)) |
| 1079 | return ti_error_einval(rs->ti, "Only one min_recovery_rate argument pair allowed"); |
| 1080 | if (value > INT_MAX) |
| 1081 | return ti_error_einval(rs->ti, "min_recovery_rate out of range"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1082 | rs->md.sync_speed_min = (int)value; |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1083 | } else if (!strcasecmp(key, _argname_by_flag(CTR_FLAG_MAX_RECOVERY_RATE))) { |
| 1084 | if (_test_and_set_flag(CTR_FLAG_MIN_RECOVERY_RATE, &rs->ctr_flags)) |
| 1085 | return ti_error_einval(rs->ti, "Only one max_recovery_rate argument pair allowed"); |
| 1086 | if (value > INT_MAX) |
| 1087 | return ti_error_einval(rs->ti, "max_recovery_rate out of range"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1088 | rs->md.sync_speed_max = (int)value; |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1089 | } else if (!strcasecmp(key, _argname_by_flag(CTR_FLAG_REGION_SIZE))) { |
| 1090 | if (_test_and_set_flag(CTR_FLAG_REGION_SIZE, &rs->ctr_flags)) |
| 1091 | return ti_error_einval(rs->ti, "Only one region_size argument pair allowed"); |
| 1092 | |
Jonathan Brassow | c108456 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1093 | region_size = value; |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1094 | } else if (!strcasecmp(key, _argname_by_flag(CTR_FLAG_RAID10_COPIES))) { |
| 1095 | if (_test_and_set_flag(CTR_FLAG_RAID10_COPIES, &rs->ctr_flags)) |
| 1096 | return ti_error_einval(rs->ti, "Only one raid10_copies argument pair allowed"); |
| 1097 | |
| 1098 | if (!_in_range(value, 2, rs->md.raid_disks)) |
| 1099 | return ti_error_einval(rs->ti, "Bad value for 'raid10_copies'"); |
| 1100 | |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 1101 | raid10_copies = value; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1102 | } else { |
| 1103 | DMERR("Unable to parse RAID parameter: %s", key); |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1104 | return ti_error_einval(rs->ti, "Unable to parse RAID parameters"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1105 | } |
| 1106 | } |
| 1107 | |
Jonathan Brassow | c108456 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1108 | if (validate_region_size(rs, region_size)) |
| 1109 | return -EINVAL; |
| 1110 | |
| 1111 | if (rs->md.chunk_sectors) |
Mike Snitzer | 542f903 | 2012-07-27 15:08:00 +0100 | [diff] [blame] | 1112 | max_io_len = rs->md.chunk_sectors; |
Jonathan Brassow | c108456 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1113 | else |
Mike Snitzer | 542f903 | 2012-07-27 15:08:00 +0100 | [diff] [blame] | 1114 | max_io_len = region_size; |
Jonathan Brassow | c108456 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1115 | |
Mike Snitzer | 542f903 | 2012-07-27 15:08:00 +0100 | [diff] [blame] | 1116 | if (dm_set_target_max_io_len(rs->ti, max_io_len)) |
| 1117 | return -EINVAL; |
Jonathan Brassow | 3273727 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1118 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1119 | if (rt_is_raid10(rt)) { |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1120 | if (raid10_copies > rs->md.raid_disks) |
| 1121 | return ti_error_einval(rs->ti, "Not enough devices to satisfy specification"); |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 1122 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1123 | rs->md.new_layout = raid10_format_to_md_layout(rs, raid10_format, raid10_copies); |
| 1124 | if (rs->md.new_layout < 0) |
| 1125 | return ti_error_ret(rs->ti, "Error getting raid10 format", rs->md.new_layout); |
| 1126 | |
| 1127 | rt = get_raid_type_by_ll(10, rs->md.new_layout); |
| 1128 | if (!rt) |
| 1129 | return ti_error_einval(rs->ti, "Failed to recognize new raid10 layout"); |
| 1130 | |
| 1131 | if ((rt->algorithm == ALGORITHM_RAID10_DEFAULT || |
| 1132 | rt->algorithm == ALGORITHM_RAID10_NEAR) && |
| 1133 | _test_flag(CTR_FLAG_RAID10_USE_NEAR_SETS, rs->ctr_flags)) |
Heinz Mauelshagen | 4763e54 | 2016-05-19 18:49:31 +0200 | [diff] [blame^] | 1134 | return ti_error_einval(rs->ti, "RAID10 format 'near' and 'raid10_use_near_sets' are incompatible"); |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 1135 | |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 1136 | /* (Len * #mirrors) / #devices */ |
| 1137 | sectors_per_dev = rs->ti->len * raid10_copies; |
| 1138 | sector_div(sectors_per_dev, rs->md.raid_disks); |
| 1139 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1140 | rs->md.layout = raid10_format_to_md_layout(rs, raid10_format, raid10_copies); |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 1141 | rs->md.new_layout = rs->md.layout; |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1142 | } else if (!rt_is_raid1(rt) && |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 1143 | sector_div(sectors_per_dev, |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1144 | (rs->md.raid_disks - rt->parity_devs))) |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1145 | return ti_error_einval(rs->ti, "Target length not divisible by number of data devices"); |
| 1146 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1147 | rs->raid10_copies = raid10_copies; |
Jonathan E Brassow | c039c33 | 2012-07-27 15:08:04 +0100 | [diff] [blame] | 1148 | rs->md.dev_sectors = sectors_per_dev; |
| 1149 | |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1150 | /* Assume there are no metadata devices until the drives are parsed */ |
| 1151 | rs->md.persistent = 0; |
| 1152 | rs->md.external = 1; |
| 1153 | |
Heinz Mauelshagen | f090279 | 2016-05-19 18:49:27 +0200 | [diff] [blame] | 1154 | /* Check, if any invalid ctr arguments have been passed in for the raid level */ |
| 1155 | return rs_check_for_invalid_flags(rs); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1156 | } |
| 1157 | |
| 1158 | static void do_table_event(struct work_struct *ws) |
| 1159 | { |
| 1160 | struct raid_set *rs = container_of(ws, struct raid_set, md.event_work); |
| 1161 | |
| 1162 | dm_table_event(rs->ti->table); |
| 1163 | } |
| 1164 | |
| 1165 | static int raid_is_congested(struct dm_target_callbacks *cb, int bits) |
| 1166 | { |
| 1167 | struct raid_set *rs = container_of(cb, struct raid_set, callbacks); |
| 1168 | |
NeilBrown | 5c675f8 | 2014-12-15 12:56:56 +1100 | [diff] [blame] | 1169 | return mddev_congested(&rs->md, bits); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1170 | } |
| 1171 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1172 | /* Features */ |
| 1173 | #define FEATURE_FLAG_SUPPORTS_RESHAPE 0x1 |
| 1174 | |
| 1175 | /* State flags for sb->flags */ |
| 1176 | #define SB_FLAG_RESHAPE_ACTIVE 0x1 |
| 1177 | #define SB_FLAG_RESHAPE_BACKWARDS 0x2 |
| 1178 | |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1179 | /* |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1180 | * This structure is never routinely used by userspace, unlike md superblocks. |
| 1181 | * Devices with this superblock should only ever be accessed via device-mapper. |
| 1182 | */ |
| 1183 | #define DM_RAID_MAGIC 0x64526D44 |
| 1184 | struct dm_raid_superblock { |
| 1185 | __le32 magic; /* "DmRd" */ |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1186 | __le32 compat_features; /* Used to indicate compatible features (like 1.8.0 ondisk metadata extension) */ |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1187 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1188 | __le32 num_devices; /* Number of devices in this raid set. (Max 64) */ |
| 1189 | __le32 array_position; /* The position of this drive in the raid set */ |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1190 | |
| 1191 | __le64 events; /* Incremented by md when superblock updated */ |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1192 | __le64 failed_devices; /* Pre 1.8.0 part of bit field of devices to */ |
| 1193 | /* indicate failures (see extension below) */ |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1194 | |
| 1195 | /* |
| 1196 | * This offset tracks the progress of the repair or replacement of |
| 1197 | * an individual drive. |
| 1198 | */ |
| 1199 | __le64 disk_recovery_offset; |
| 1200 | |
| 1201 | /* |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1202 | * This offset tracks the progress of the initial raid set |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1203 | * synchronisation/parity calculation. |
| 1204 | */ |
| 1205 | __le64 array_resync_offset; |
| 1206 | |
| 1207 | /* |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1208 | * raid characteristics |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1209 | */ |
| 1210 | __le32 level; |
| 1211 | __le32 layout; |
| 1212 | __le32 stripe_sectors; |
| 1213 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1214 | /******************************************************************** |
| 1215 | * BELOW FOLLOW V1.8.0 EXTENSIONS TO THE PRISTINE SUPERBLOCK FORMAT!!! |
| 1216 | * |
| 1217 | * FEATURE_FLAG_SUPPORTS_RESHAPE in the features member indicates that those exist |
| 1218 | */ |
| 1219 | |
| 1220 | __le32 flags; /* Flags defining array states for reshaping */ |
| 1221 | |
| 1222 | /* |
| 1223 | * This offset tracks the progress of a raid |
| 1224 | * set reshape in order to be able to restart it |
| 1225 | */ |
| 1226 | __le64 reshape_position; |
| 1227 | |
| 1228 | /* |
| 1229 | * These define the properties of the array in case of an interrupted reshape |
| 1230 | */ |
| 1231 | __le32 new_level; |
| 1232 | __le32 new_layout; |
| 1233 | __le32 new_stripe_sectors; |
| 1234 | __le32 delta_disks; |
| 1235 | |
| 1236 | __le64 array_sectors; /* Array size in sectors */ |
| 1237 | |
| 1238 | /* |
| 1239 | * Sector offsets to data on devices (reshaping). |
| 1240 | * Needed to support out of place reshaping, thus |
| 1241 | * not writing over any stripes whilst converting |
| 1242 | * them from old to new layout |
| 1243 | */ |
| 1244 | __le64 data_offset; |
| 1245 | __le64 new_data_offset; |
| 1246 | |
| 1247 | __le64 sectors; /* Used device size in sectors */ |
| 1248 | |
| 1249 | /* |
| 1250 | * Additonal Bit field of devices indicating failures to support |
| 1251 | * up to 256 devices with the 1.8.0 on-disk metadata format |
| 1252 | */ |
| 1253 | __le64 extended_failed_devices[DISKS_ARRAY_ELEMS - 1]; |
| 1254 | |
| 1255 | __le32 incompat_features; /* Used to indicate any incompatible features */ |
| 1256 | |
| 1257 | /* Always set rest up to logical block size to 0 when writing (see get_metadata_device() below). */ |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1258 | } __packed; |
| 1259 | |
NeilBrown | 3cb0300 | 2011-10-11 16:45:26 +1100 | [diff] [blame] | 1260 | static int read_disk_sb(struct md_rdev *rdev, int size) |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1261 | { |
| 1262 | BUG_ON(!rdev->sb_page); |
| 1263 | |
| 1264 | if (rdev->sb_loaded) |
| 1265 | return 0; |
| 1266 | |
Mike Christie | 796a5cf | 2016-06-05 14:32:07 -0500 | [diff] [blame] | 1267 | 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] | 1268 | DMERR("Failed to read superblock of device at position %d", |
| 1269 | rdev->raid_disk); |
Jonathan Brassow | c32fb9e | 2012-05-22 13:55:31 +1000 | [diff] [blame] | 1270 | md_error(rdev->mddev, rdev); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1271 | return -EINVAL; |
| 1272 | } |
| 1273 | |
| 1274 | rdev->sb_loaded = 1; |
| 1275 | |
| 1276 | return 0; |
| 1277 | } |
| 1278 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1279 | static void sb_retrieve_failed_devices(struct dm_raid_superblock *sb, uint64_t *failed_devices) |
| 1280 | { |
| 1281 | failed_devices[0] = le64_to_cpu(sb->failed_devices); |
| 1282 | memset(failed_devices + 1, 0, sizeof(sb->extended_failed_devices)); |
| 1283 | |
| 1284 | if (_test_flag(FEATURE_FLAG_SUPPORTS_RESHAPE, le32_to_cpu(sb->compat_features))) { |
| 1285 | int i = ARRAY_SIZE(sb->extended_failed_devices); |
| 1286 | |
| 1287 | while (i--) |
| 1288 | failed_devices[i+1] = le64_to_cpu(sb->extended_failed_devices[i]); |
| 1289 | } |
| 1290 | } |
| 1291 | |
NeilBrown | fd01b88 | 2011-10-11 16:47:53 +1100 | [diff] [blame] | 1292 | static void super_sync(struct mddev *mddev, struct md_rdev *rdev) |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1293 | { |
Jonathan Brassow | 81f382f | 2012-05-22 13:55:30 +1000 | [diff] [blame] | 1294 | int i; |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1295 | uint64_t failed_devices; |
| 1296 | struct dm_raid_superblock *sb; |
Jonathan Brassow | 81f382f | 2012-05-22 13:55:30 +1000 | [diff] [blame] | 1297 | struct raid_set *rs = container_of(mddev, struct raid_set, md); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1298 | |
| 1299 | sb = page_address(rdev->sb_page); |
| 1300 | failed_devices = le64_to_cpu(sb->failed_devices); |
| 1301 | |
Jonathan Brassow | 81f382f | 2012-05-22 13:55:30 +1000 | [diff] [blame] | 1302 | for (i = 0; i < mddev->raid_disks; i++) |
| 1303 | if (!rs->dev[i].data_dev || |
| 1304 | test_bit(Faulty, &(rs->dev[i].rdev.flags))) |
| 1305 | failed_devices |= (1ULL << i); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1306 | |
Heinz Mauelshagen | 40d43c4 | 2014-10-17 13:38:50 +0200 | [diff] [blame] | 1307 | memset(sb + 1, 0, rdev->sb_size - sizeof(*sb)); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1308 | |
| 1309 | sb->magic = cpu_to_le32(DM_RAID_MAGIC); |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1310 | sb->compat_features = cpu_to_le32(0); /* No features yet */ |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1311 | |
| 1312 | sb->num_devices = cpu_to_le32(mddev->raid_disks); |
| 1313 | sb->array_position = cpu_to_le32(rdev->raid_disk); |
| 1314 | |
| 1315 | sb->events = cpu_to_le64(mddev->events); |
| 1316 | sb->failed_devices = cpu_to_le64(failed_devices); |
| 1317 | |
| 1318 | sb->disk_recovery_offset = cpu_to_le64(rdev->recovery_offset); |
| 1319 | sb->array_resync_offset = cpu_to_le64(mddev->recovery_cp); |
| 1320 | |
| 1321 | sb->level = cpu_to_le32(mddev->level); |
| 1322 | sb->layout = cpu_to_le32(mddev->layout); |
| 1323 | sb->stripe_sectors = cpu_to_le32(mddev->chunk_sectors); |
| 1324 | } |
| 1325 | |
| 1326 | /* |
| 1327 | * super_load |
| 1328 | * |
| 1329 | * This function creates a superblock if one is not found on the device |
| 1330 | * and will decide which superblock to use if there's a choice. |
| 1331 | * |
| 1332 | * Return: 1 if use rdev, 0 if use refdev, -Exxx otherwise |
| 1333 | */ |
NeilBrown | 3cb0300 | 2011-10-11 16:45:26 +1100 | [diff] [blame] | 1334 | static int super_load(struct md_rdev *rdev, struct md_rdev *refdev) |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1335 | { |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1336 | int r; |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1337 | struct dm_raid_superblock *sb; |
| 1338 | struct dm_raid_superblock *refsb; |
| 1339 | uint64_t events_sb, events_refsb; |
| 1340 | |
| 1341 | rdev->sb_start = 0; |
Heinz Mauelshagen | 40d43c4 | 2014-10-17 13:38:50 +0200 | [diff] [blame] | 1342 | rdev->sb_size = bdev_logical_block_size(rdev->meta_bdev); |
| 1343 | if (rdev->sb_size < sizeof(*sb) || rdev->sb_size > PAGE_SIZE) { |
| 1344 | DMERR("superblock size of a logical block is no longer valid"); |
| 1345 | return -EINVAL; |
| 1346 | } |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1347 | |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1348 | r = read_disk_sb(rdev, rdev->sb_size); |
| 1349 | if (r) |
| 1350 | return r; |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1351 | |
| 1352 | sb = page_address(rdev->sb_page); |
Jonathan E Brassow | 3aa3b2b | 2012-03-07 19:09:47 +0000 | [diff] [blame] | 1353 | |
| 1354 | /* |
| 1355 | * Two cases that we want to write new superblocks and rebuild: |
| 1356 | * 1) New device (no matching magic number) |
| 1357 | * 2) Device specified for rebuild (!In_sync w/ offset == 0) |
| 1358 | */ |
| 1359 | if ((sb->magic != cpu_to_le32(DM_RAID_MAGIC)) || |
| 1360 | (!test_bit(In_sync, &rdev->flags) && !rdev->recovery_offset)) { |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1361 | super_sync(rdev->mddev, rdev); |
| 1362 | |
| 1363 | set_bit(FirstUse, &rdev->flags); |
| 1364 | |
| 1365 | /* Force writing of superblocks to disk */ |
| 1366 | set_bit(MD_CHANGE_DEVS, &rdev->mddev->flags); |
| 1367 | |
| 1368 | /* Any superblock is better than none, choose that if given */ |
| 1369 | return refdev ? 0 : 1; |
| 1370 | } |
| 1371 | |
| 1372 | if (!refdev) |
| 1373 | return 1; |
| 1374 | |
| 1375 | events_sb = le64_to_cpu(sb->events); |
| 1376 | |
| 1377 | refsb = page_address(refdev->sb_page); |
| 1378 | events_refsb = le64_to_cpu(refsb->events); |
| 1379 | |
| 1380 | return (events_sb > events_refsb) ? 1 : 0; |
| 1381 | } |
| 1382 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1383 | static int super_init_validation(struct raid_set *rs, struct md_rdev *rdev) |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1384 | { |
| 1385 | int role; |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1386 | unsigned int d; |
| 1387 | struct mddev *mddev = &rs->md; |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1388 | uint64_t events_sb; |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1389 | uint64_t failed_devices[DISKS_ARRAY_ELEMS]; |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1390 | struct dm_raid_superblock *sb; |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1391 | uint32_t new_devs = 0, rebuild_and_new = 0, rebuilds = 0; |
NeilBrown | dafb20f | 2012-03-19 12:46:39 +1100 | [diff] [blame] | 1392 | struct md_rdev *r; |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1393 | struct dm_raid_superblock *sb2; |
| 1394 | |
| 1395 | sb = page_address(rdev->sb_page); |
| 1396 | events_sb = le64_to_cpu(sb->events); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1397 | |
| 1398 | /* |
| 1399 | * Initialise to 1 if this is a new superblock. |
| 1400 | */ |
| 1401 | mddev->events = events_sb ? : 1; |
| 1402 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1403 | mddev->reshape_position = MaxSector; |
| 1404 | |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1405 | /* |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1406 | * Reshaping is supported, e.g. reshape_position is valid |
| 1407 | * in superblock and superblock content is authoritative. |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1408 | */ |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1409 | if (_test_flag(FEATURE_FLAG_SUPPORTS_RESHAPE, le32_to_cpu(sb->compat_features))) { |
| 1410 | /* Superblock is authoritative wrt given raid set layout! */ |
| 1411 | mddev->raid_disks = le32_to_cpu(sb->num_devices); |
| 1412 | mddev->level = le32_to_cpu(sb->level); |
| 1413 | mddev->layout = le32_to_cpu(sb->layout); |
| 1414 | mddev->chunk_sectors = le32_to_cpu(sb->stripe_sectors); |
| 1415 | mddev->new_level = le32_to_cpu(sb->new_level); |
| 1416 | mddev->new_layout = le32_to_cpu(sb->new_layout); |
| 1417 | mddev->new_chunk_sectors = le32_to_cpu(sb->new_stripe_sectors); |
| 1418 | mddev->delta_disks = le32_to_cpu(sb->delta_disks); |
| 1419 | mddev->array_sectors = le64_to_cpu(sb->array_sectors); |
| 1420 | |
| 1421 | /* raid was reshaping and got interrupted */ |
| 1422 | if (_test_flag(SB_FLAG_RESHAPE_ACTIVE, le32_to_cpu(sb->flags))) { |
| 1423 | if (_test_flag(CTR_FLAG_DELTA_DISKS, rs->ctr_flags)) { |
| 1424 | DMERR("Reshape requested but raid set is still reshaping"); |
| 1425 | return -EINVAL; |
| 1426 | } |
| 1427 | |
| 1428 | if (mddev->delta_disks < 0 || |
| 1429 | (!mddev->delta_disks && _test_flag(SB_FLAG_RESHAPE_BACKWARDS, le32_to_cpu(sb->flags)))) |
| 1430 | mddev->reshape_backwards = 1; |
| 1431 | else |
| 1432 | mddev->reshape_backwards = 0; |
| 1433 | |
| 1434 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); |
| 1435 | rs->raid_type = get_raid_type_by_ll(mddev->level, mddev->layout); |
| 1436 | } |
| 1437 | |
| 1438 | } else { |
| 1439 | /* |
| 1440 | * Reshaping is not allowed, because we don't have the appropriate metadata |
| 1441 | */ |
| 1442 | if (le32_to_cpu(sb->level) != mddev->level) { |
| 1443 | DMERR("Reshaping/takeover raid sets not yet supported. (raid level/stripes/size change)"); |
| 1444 | return -EINVAL; |
| 1445 | } |
| 1446 | if (le32_to_cpu(sb->layout) != mddev->layout) { |
| 1447 | DMERR("Reshaping raid sets not yet supported. (raid layout change)"); |
| 1448 | DMERR(" 0x%X vs 0x%X", le32_to_cpu(sb->layout), mddev->layout); |
| 1449 | DMERR(" Old layout: %s w/ %d copies", |
| 1450 | raid10_md_layout_to_format(le32_to_cpu(sb->layout)), |
| 1451 | raid10_md_layout_to_copies(le32_to_cpu(sb->layout))); |
| 1452 | DMERR(" New layout: %s w/ %d copies", |
| 1453 | raid10_md_layout_to_format(mddev->layout), |
| 1454 | raid10_md_layout_to_copies(mddev->layout)); |
| 1455 | return -EINVAL; |
| 1456 | } |
| 1457 | if (le32_to_cpu(sb->stripe_sectors) != mddev->chunk_sectors) { |
| 1458 | DMERR("Reshaping raid sets not yet supported. (stripe sectors change)"); |
| 1459 | return -EINVAL; |
| 1460 | } |
| 1461 | |
| 1462 | /* We can only change the number of devices in raid1 with old (i.e. pre 1.0.7) metadata */ |
| 1463 | if (!rt_is_raid1(rs->raid_type) && |
| 1464 | (le32_to_cpu(sb->num_devices) != mddev->raid_disks)) { |
| 1465 | DMERR("Reshaping raid sets not yet supported. (device count change from %u to %u)", |
| 1466 | sb->num_devices, mddev->raid_disks); |
| 1467 | return -EINVAL; |
| 1468 | } |
| 1469 | |
| 1470 | /* Table line is checked vs. authoritative superblock */ |
| 1471 | rs_set_new(rs); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1472 | } |
| 1473 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1474 | if (!_test_flag(CTR_FLAG_NOSYNC, rs->ctr_flags)) |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1475 | mddev->recovery_cp = le64_to_cpu(sb->array_resync_offset); |
| 1476 | |
| 1477 | /* |
| 1478 | * During load, we set FirstUse if a new superblock was written. |
| 1479 | * There are two reasons we might not have a superblock: |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1480 | * 1) The raid set is brand new - in which case, all of the |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1481 | * devices must have their In_sync bit set. Also, |
| 1482 | * recovery_cp must be 0, unless forced. |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1483 | * 2) This is a new device being added to an old raid set |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1484 | * and the new device needs to be rebuilt - in which |
| 1485 | * case the In_sync bit will /not/ be set and |
| 1486 | * recovery_cp must be MaxSector. |
| 1487 | */ |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1488 | d = 0; |
NeilBrown | dafb20f | 2012-03-19 12:46:39 +1100 | [diff] [blame] | 1489 | rdev_for_each(r, mddev) { |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1490 | if (test_bit(FirstUse, &r->flags)) |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1491 | new_devs++; |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1492 | |
| 1493 | if (!test_bit(In_sync, &r->flags)) { |
| 1494 | DMINFO("Device %d specified for rebuild; clearing superblock", |
| 1495 | r->raid_disk); |
| 1496 | rebuilds++; |
| 1497 | |
| 1498 | if (test_bit(FirstUse, &r->flags)) |
| 1499 | rebuild_and_new++; |
| 1500 | } |
| 1501 | |
| 1502 | d++; |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1503 | } |
| 1504 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1505 | if (new_devs == rs->raid_disks || !rebuilds) { |
| 1506 | /* Replace a broken device */ |
| 1507 | if (new_devs == 1 && !rs->delta_disks) |
| 1508 | ; |
| 1509 | if (new_devs == rs->raid_disks) { |
| 1510 | DMINFO("Superblocks created for new raid set"); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1511 | set_bit(MD_ARRAY_FIRST_USE, &mddev->flags); |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1512 | mddev->recovery_cp = 0; |
| 1513 | } else if (new_devs && new_devs != rs->raid_disks && !rebuilds) { |
| 1514 | DMERR("New device injected into existing raid set without " |
| 1515 | "'delta_disks' or 'rebuild' parameter specified"); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1516 | return -EINVAL; |
| 1517 | } |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1518 | } else if (new_devs && new_devs != rebuilds) { |
| 1519 | DMERR("%u 'rebuild' devices cannot be injected into" |
| 1520 | " a raid set with %u other first-time devices", |
| 1521 | rebuilds, new_devs); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1522 | return -EINVAL; |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1523 | } else if (rebuilds) { |
| 1524 | if (rebuild_and_new && rebuilds != rebuild_and_new) { |
| 1525 | DMERR("new device%s provided without 'rebuild'", |
| 1526 | new_devs > 1 ? "s" : ""); |
| 1527 | return -EINVAL; |
| 1528 | } else if (mddev->recovery_cp != MaxSector) { |
| 1529 | DMERR("'rebuild' specified while raid set is not in-sync (recovery_cp=%llu)", |
| 1530 | (unsigned long long) mddev->recovery_cp); |
| 1531 | return -EINVAL; |
| 1532 | } else if (mddev->reshape_position != MaxSector) { |
| 1533 | DMERR("'rebuild' specified while raid set is being reshaped"); |
| 1534 | return -EINVAL; |
| 1535 | } |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1536 | } |
| 1537 | |
| 1538 | /* |
| 1539 | * Now we set the Faulty bit for those devices that are |
| 1540 | * recorded in the superblock as failed. |
| 1541 | */ |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1542 | sb_retrieve_failed_devices(sb, failed_devices); |
NeilBrown | dafb20f | 2012-03-19 12:46:39 +1100 | [diff] [blame] | 1543 | rdev_for_each(r, mddev) { |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1544 | if (!r->sb_page) |
| 1545 | continue; |
| 1546 | sb2 = page_address(r->sb_page); |
| 1547 | sb2->failed_devices = 0; |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1548 | memset(sb2->extended_failed_devices, 0, sizeof(sb2->extended_failed_devices)); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1549 | |
| 1550 | /* |
| 1551 | * Check for any device re-ordering. |
| 1552 | */ |
| 1553 | if (!test_bit(FirstUse, &r->flags) && (r->raid_disk >= 0)) { |
| 1554 | role = le32_to_cpu(sb2->array_position); |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1555 | if (role < 0) |
| 1556 | continue; |
| 1557 | |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1558 | if (role != r->raid_disk) { |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1559 | if (_is_raid10_near(mddev->layout)) { |
| 1560 | if (mddev->raid_disks % _raid10_near_copies(mddev->layout) || |
| 1561 | rs->raid_disks % rs->raid10_copies) |
| 1562 | return ti_error_einval(rs->ti, "Cannot change raid10 near " |
| 1563 | "set to odd # of devices!"); |
| 1564 | |
| 1565 | sb2->array_position = cpu_to_le32(r->raid_disk); |
| 1566 | |
| 1567 | } else if (!(rs_is_raid10(rs) && rt_is_raid0(rs->raid_type)) && |
| 1568 | !(rs_is_raid0(rs) && rt_is_raid10(rs->raid_type)) && |
| 1569 | !rt_is_raid1(rs->raid_type)) |
| 1570 | return ti_error_einval(rs->ti, "Cannot change device positions in raid set"); |
| 1571 | |
| 1572 | DMINFO("raid device #%d now at position #%d", |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1573 | role, r->raid_disk); |
| 1574 | } |
| 1575 | |
| 1576 | /* |
| 1577 | * Partial recovery is performed on |
| 1578 | * returning failed devices. |
| 1579 | */ |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1580 | if (test_bit(role, (void *) failed_devices)) |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1581 | set_bit(Faulty, &r->flags); |
| 1582 | } |
| 1583 | } |
| 1584 | |
| 1585 | return 0; |
| 1586 | } |
| 1587 | |
Heinz Mauelshagen | 0cf4503 | 2015-04-29 14:03:04 +0200 | [diff] [blame] | 1588 | static int super_validate(struct raid_set *rs, struct md_rdev *rdev) |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1589 | { |
Heinz Mauelshagen | 0cf4503 | 2015-04-29 14:03:04 +0200 | [diff] [blame] | 1590 | struct mddev *mddev = &rs->md; |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1591 | struct dm_raid_superblock *sb; |
| 1592 | |
| 1593 | if (!rdev->sb_page) |
| 1594 | return 0; |
| 1595 | |
| 1596 | sb = page_address(rdev->sb_page); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1597 | |
| 1598 | /* |
| 1599 | * If mddev->events is not set, we know we have not yet initialized |
| 1600 | * the array. |
| 1601 | */ |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1602 | if (!mddev->events && super_init_validation(rs, rdev)) |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1603 | return -EINVAL; |
| 1604 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1605 | if (sb->compat_features || sb->incompat_features) { |
Heinz Mauelshagen | 4c9971c | 2016-04-29 18:59:56 +0200 | [diff] [blame] | 1606 | rs->ti->error = "Unable to assemble array: No feature flags supported yet"; |
| 1607 | return -EINVAL; |
| 1608 | } |
| 1609 | |
Heinz Mauelshagen | 0cf4503 | 2015-04-29 14:03:04 +0200 | [diff] [blame] | 1610 | /* Enable bitmap creation for RAID levels != 0 */ |
Heinz Mauelshagen | 676fa5a | 2016-05-19 18:49:29 +0200 | [diff] [blame] | 1611 | 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] | 1612 | rdev->mddev->bitmap_info.default_offset = mddev->bitmap_info.offset; |
| 1613 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1614 | if (!test_and_clear_bit(FirstUse, &rdev->flags)) { |
| 1615 | /* Retrieve device size stored in superblock to be prepared for shrink */ |
| 1616 | rdev->sectors = le64_to_cpu(sb->sectors); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1617 | rdev->recovery_offset = le64_to_cpu(sb->disk_recovery_offset); |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1618 | if (rdev->recovery_offset == MaxSector) |
| 1619 | set_bit(In_sync, &rdev->flags); |
| 1620 | /* |
| 1621 | * If no reshape in progress -> we're recovering single |
| 1622 | * disk(s) and have to set the device(s) to out-of-sync |
| 1623 | */ |
| 1624 | else if (rs->md.reshape_position == MaxSector) |
| 1625 | clear_bit(In_sync, &rdev->flags); /* Mandatory for recovery */ |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1626 | } |
| 1627 | |
| 1628 | /* |
| 1629 | * If a device comes back, set it as not In_sync and no longer faulty. |
| 1630 | */ |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1631 | if (test_and_clear_bit(Faulty, &rdev->flags)) { |
| 1632 | rdev->recovery_offset = 0; |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1633 | clear_bit(In_sync, &rdev->flags); |
| 1634 | rdev->saved_raid_disk = rdev->raid_disk; |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1635 | } |
| 1636 | |
Heinz Mauelshagen | 33e53f0 | 2016-05-19 18:49:30 +0200 | [diff] [blame] | 1637 | /* Reshape support -> restore repective data offsets */ |
| 1638 | rdev->data_offset = le64_to_cpu(sb->data_offset); |
| 1639 | rdev->new_data_offset = le64_to_cpu(sb->new_data_offset); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1640 | |
| 1641 | return 0; |
| 1642 | } |
| 1643 | |
| 1644 | /* |
| 1645 | * Analyse superblocks and select the freshest. |
| 1646 | */ |
| 1647 | static int analyse_superblocks(struct dm_target *ti, struct raid_set *rs) |
| 1648 | { |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1649 | int r; |
Jonathan E Brassow | 0447568 | 2012-03-28 18:41:26 +0100 | [diff] [blame] | 1650 | struct raid_dev *dev; |
Jonathan Brassow | a9ad852 | 2012-04-24 10:23:13 +1000 | [diff] [blame] | 1651 | struct md_rdev *rdev, *tmp, *freshest; |
NeilBrown | fd01b88 | 2011-10-11 16:47:53 +1100 | [diff] [blame] | 1652 | struct mddev *mddev = &rs->md; |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1653 | |
| 1654 | freshest = NULL; |
Jonathan Brassow | a9ad852 | 2012-04-24 10:23:13 +1000 | [diff] [blame] | 1655 | rdev_for_each_safe(rdev, tmp, mddev) { |
Jonathan Brassow | 761becf | 2012-10-11 13:42:19 +1100 | [diff] [blame] | 1656 | /* |
Heinz Mauelshagen | c76d53f | 2015-04-29 14:03:00 +0200 | [diff] [blame] | 1657 | * Skipping super_load due to CTR_FLAG_SYNC will cause |
Jonathan Brassow | 761becf | 2012-10-11 13:42:19 +1100 | [diff] [blame] | 1658 | * the array to undergo initialization again as |
| 1659 | * though it were new. This is the intended effect |
| 1660 | * of the "sync" directive. |
| 1661 | * |
| 1662 | * When reshaping capability is added, we must ensure |
| 1663 | * that the "sync" directive is disallowed during the |
| 1664 | * reshape. |
| 1665 | */ |
Heinz Mauelshagen | 0cf4503 | 2015-04-29 14:03:04 +0200 | [diff] [blame] | 1666 | rdev->sectors = to_sector(i_size_read(rdev->bdev->bd_inode)); |
| 1667 | |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 1668 | if (_test_flag(CTR_FLAG_SYNC, rs->ctr_flags)) |
Jonathan Brassow | 761becf | 2012-10-11 13:42:19 +1100 | [diff] [blame] | 1669 | continue; |
| 1670 | |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1671 | if (!rdev->meta_bdev) |
| 1672 | continue; |
| 1673 | |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1674 | r = super_load(rdev, freshest); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1675 | |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1676 | switch (r) { |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1677 | case 1: |
| 1678 | freshest = rdev; |
| 1679 | break; |
| 1680 | case 0: |
| 1681 | break; |
| 1682 | default: |
Jonathan E Brassow | 0447568 | 2012-03-28 18:41:26 +0100 | [diff] [blame] | 1683 | dev = container_of(rdev, struct raid_dev, rdev); |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 1684 | if (dev->meta_dev) |
| 1685 | dm_put_device(ti, dev->meta_dev); |
Jonathan E Brassow | 0447568 | 2012-03-28 18:41:26 +0100 | [diff] [blame] | 1686 | |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 1687 | dev->meta_dev = NULL; |
| 1688 | rdev->meta_bdev = NULL; |
Jonathan E Brassow | 0447568 | 2012-03-28 18:41:26 +0100 | [diff] [blame] | 1689 | |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 1690 | if (rdev->sb_page) |
| 1691 | put_page(rdev->sb_page); |
Jonathan E Brassow | 0447568 | 2012-03-28 18:41:26 +0100 | [diff] [blame] | 1692 | |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 1693 | rdev->sb_page = NULL; |
Jonathan E Brassow | 0447568 | 2012-03-28 18:41:26 +0100 | [diff] [blame] | 1694 | |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 1695 | rdev->sb_loaded = 0; |
Jonathan E Brassow | 0447568 | 2012-03-28 18:41:26 +0100 | [diff] [blame] | 1696 | |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 1697 | /* |
| 1698 | * We might be able to salvage the data device |
| 1699 | * even though the meta device has failed. For |
| 1700 | * now, we behave as though '- -' had been |
| 1701 | * set for this device in the table. |
| 1702 | */ |
| 1703 | if (dev->data_dev) |
| 1704 | dm_put_device(ti, dev->data_dev); |
Jonathan E Brassow | 0447568 | 2012-03-28 18:41:26 +0100 | [diff] [blame] | 1705 | |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 1706 | dev->data_dev = NULL; |
| 1707 | rdev->bdev = NULL; |
Jonathan E Brassow | 0447568 | 2012-03-28 18:41:26 +0100 | [diff] [blame] | 1708 | |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 1709 | list_del(&rdev->same_set); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1710 | } |
| 1711 | } |
| 1712 | |
| 1713 | if (!freshest) |
| 1714 | return 0; |
| 1715 | |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1716 | if (validate_raid_redundancy(rs)) |
| 1717 | return ti_error_einval(rs->ti, "Insufficient redundancy to activate array"); |
Jonathan Brassow | 55ebbb5 | 2013-01-22 21:42:18 -0600 | [diff] [blame] | 1718 | |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1719 | /* |
| 1720 | * Validation of the freshest device provides the source of |
| 1721 | * validation for the remaining devices. |
| 1722 | */ |
Heinz Mauelshagen | 0cf4503 | 2015-04-29 14:03:04 +0200 | [diff] [blame] | 1723 | if (super_validate(rs, freshest)) |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1724 | return ti_error_einval(rs->ti, "Unable to assemble array: Invalid superblocks"); |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1725 | |
NeilBrown | dafb20f | 2012-03-19 12:46:39 +1100 | [diff] [blame] | 1726 | rdev_for_each(rdev, mddev) |
Heinz Mauelshagen | 0cf4503 | 2015-04-29 14:03:04 +0200 | [diff] [blame] | 1727 | if ((rdev != freshest) && super_validate(rs, rdev)) |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1728 | return -EINVAL; |
| 1729 | |
| 1730 | return 0; |
| 1731 | } |
| 1732 | |
| 1733 | /* |
Heinz Mauelshagen | 48cf06b | 2014-09-24 17:47:19 +0200 | [diff] [blame] | 1734 | * Enable/disable discard support on RAID set depending on |
| 1735 | * RAID level and discard properties of underlying RAID members. |
Heinz Mauelshagen | 75b8e04 | 2014-09-24 17:47:18 +0200 | [diff] [blame] | 1736 | */ |
| 1737 | static void configure_discard_support(struct dm_target *ti, struct raid_set *rs) |
| 1738 | { |
Heinz Mauelshagen | 48cf06b | 2014-09-24 17:47:19 +0200 | [diff] [blame] | 1739 | int i; |
| 1740 | bool raid456; |
| 1741 | |
Heinz Mauelshagen | 75b8e04 | 2014-09-24 17:47:18 +0200 | [diff] [blame] | 1742 | /* Assume discards not supported until after checks below. */ |
| 1743 | ti->discards_supported = false; |
| 1744 | |
| 1745 | /* RAID level 4,5,6 require discard_zeroes_data for data integrity! */ |
Heinz Mauelshagen | 48cf06b | 2014-09-24 17:47:19 +0200 | [diff] [blame] | 1746 | 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] | 1747 | |
Heinz Mauelshagen | 48cf06b | 2014-09-24 17:47:19 +0200 | [diff] [blame] | 1748 | for (i = 0; i < rs->md.raid_disks; i++) { |
Heinz Mauelshagen | d20c4b0 | 2014-10-29 19:02:27 +0100 | [diff] [blame] | 1749 | struct request_queue *q; |
Heinz Mauelshagen | 48cf06b | 2014-09-24 17:47:19 +0200 | [diff] [blame] | 1750 | |
Heinz Mauelshagen | d20c4b0 | 2014-10-29 19:02:27 +0100 | [diff] [blame] | 1751 | if (!rs->dev[i].rdev.bdev) |
| 1752 | continue; |
| 1753 | |
| 1754 | q = bdev_get_queue(rs->dev[i].rdev.bdev); |
Heinz Mauelshagen | 48cf06b | 2014-09-24 17:47:19 +0200 | [diff] [blame] | 1755 | if (!q || !blk_queue_discard(q)) |
| 1756 | return; |
| 1757 | |
| 1758 | if (raid456) { |
| 1759 | if (!q->limits.discard_zeroes_data) |
| 1760 | return; |
| 1761 | if (!devices_handle_discard_safely) { |
| 1762 | DMERR("raid456 discard support disabled due to discard_zeroes_data uncertainty."); |
| 1763 | DMERR("Set dm-raid.devices_handle_discard_safely=Y to override."); |
| 1764 | return; |
| 1765 | } |
| 1766 | } |
| 1767 | } |
| 1768 | |
| 1769 | /* All RAID members properly support discards */ |
Heinz Mauelshagen | 75b8e04 | 2014-09-24 17:47:18 +0200 | [diff] [blame] | 1770 | ti->discards_supported = true; |
| 1771 | |
| 1772 | /* |
| 1773 | * RAID1 and RAID10 personalities require bio splitting, |
Heinz Mauelshagen | 48cf06b | 2014-09-24 17:47:19 +0200 | [diff] [blame] | 1774 | * RAID0/4/5/6 don't and process large discard bios properly. |
Heinz Mauelshagen | 75b8e04 | 2014-09-24 17:47:18 +0200 | [diff] [blame] | 1775 | */ |
Heinz Mauelshagen | 48cf06b | 2014-09-24 17:47:19 +0200 | [diff] [blame] | 1776 | ti->split_discard_bios = !!(rs->md.level == 1 || rs->md.level == 10); |
Heinz Mauelshagen | 75b8e04 | 2014-09-24 17:47:18 +0200 | [diff] [blame] | 1777 | ti->num_discard_bios = 1; |
| 1778 | } |
| 1779 | |
| 1780 | /* |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1781 | * Construct a RAID0/1/10/4/5/6 mapping: |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1782 | * Args: |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1783 | * <raid_type> <#raid_params> <raid_params>{0,} \ |
| 1784 | * <#raid_devs> [<meta_dev1> <dev1>]{1,} |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1785 | * |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1786 | * <raid_params> varies by <raid_type>. See 'parse_raid_params' for |
| 1787 | * details on possible <raid_params>. |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1788 | * |
| 1789 | * Userspace is free to initialize the metadata devices, hence the superblocks to |
| 1790 | * enforce recreation based on the passed in table parameters. |
| 1791 | * |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1792 | */ |
| 1793 | static int raid_ctr(struct dm_target *ti, unsigned argc, char **argv) |
| 1794 | { |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1795 | int r; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1796 | struct raid_type *rt; |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 1797 | unsigned num_raid_params, num_raid_devs; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1798 | struct raid_set *rs = NULL; |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 1799 | const char *arg; |
| 1800 | struct dm_arg_set as = { argc, argv }, as_nrd; |
| 1801 | struct dm_arg _args[] = { |
| 1802 | { 0, as.argc, "Cannot understand number of raid parameters" }, |
| 1803 | { 1, 254, "Cannot understand number of raid devices parameters" } |
| 1804 | }; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1805 | |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 1806 | /* Must have <raid_type> */ |
| 1807 | arg = dm_shift_arg(&as); |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1808 | if (!arg) |
| 1809 | return ti_error_einval(rs->ti, "No arguments"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1810 | |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 1811 | rt = get_raid_type(arg); |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1812 | if (!rt) |
| 1813 | return ti_error_einval(rs->ti, "Unrecognised raid_type"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1814 | |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 1815 | /* Must have <#raid_params> */ |
| 1816 | if (dm_read_arg_group(_args, &as, &num_raid_params, &ti->error)) |
| 1817 | return -EINVAL; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1818 | |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 1819 | /* number of raid device tupples <meta_dev data_dev> */ |
| 1820 | as_nrd = as; |
| 1821 | dm_consume_args(&as_nrd, num_raid_params); |
| 1822 | _args[1].max = (as_nrd.argc - 1) / 2; |
| 1823 | if (dm_read_arg(_args + 1, &as_nrd, &num_raid_devs, &ti->error)) |
| 1824 | return -EINVAL; |
| 1825 | |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1826 | if (!_in_range(num_raid_devs, 1, MAX_RAID_DEVICES)) |
| 1827 | return ti_error_einval(rs->ti, "Invalid number of supplied raid devices"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1828 | |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 1829 | rs = context_alloc(ti, rt, num_raid_devs); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1830 | if (IS_ERR(rs)) |
| 1831 | return PTR_ERR(rs); |
| 1832 | |
Heinz Mauelshagen | 92c83d7 | 2016-05-19 18:49:25 +0200 | [diff] [blame] | 1833 | r = parse_raid_params(rs, &as, num_raid_params); |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1834 | if (r) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1835 | goto bad; |
| 1836 | |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1837 | r = parse_dev_params(rs, &as); |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1838 | if (r) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1839 | goto bad; |
| 1840 | |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1841 | rs->md.sync_super = super_sync; |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1842 | r = analyse_superblocks(ti, rs); |
| 1843 | if (r) |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1844 | goto bad; |
| 1845 | |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1846 | INIT_WORK(&rs->md.event_work, do_table_event); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1847 | ti->private = rs; |
Alasdair G Kergon | 55a62ee | 2013-03-01 22:45:47 +0000 | [diff] [blame] | 1848 | ti->num_flush_bios = 1; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1849 | |
Heinz Mauelshagen | 75b8e04 | 2014-09-24 17:47:18 +0200 | [diff] [blame] | 1850 | /* |
| 1851 | * Disable/enable discard support on RAID set. |
| 1852 | */ |
| 1853 | configure_discard_support(ti, rs); |
| 1854 | |
Heinz Mauelshagen | 0cf4503 | 2015-04-29 14:03:04 +0200 | [diff] [blame] | 1855 | /* Has to be held on running the array */ |
| 1856 | mddev_lock_nointr(&rs->md); |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1857 | r = md_run(&rs->md); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1858 | rs->md.in_sync = 0; /* Assume already marked dirty */ |
Heinz Mauelshagen | 0cf4503 | 2015-04-29 14:03:04 +0200 | [diff] [blame] | 1859 | mddev_unlock(&rs->md); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1860 | |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1861 | if (r) { |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1862 | ti->error = "Fail to run raid array"; |
| 1863 | goto bad; |
| 1864 | } |
| 1865 | |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 1866 | if (ti->len != rs->md.array_sectors) { |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 1867 | 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] | 1868 | goto size_mismatch; |
| 1869 | } |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1870 | rs->callbacks.congested_fn = raid_is_congested; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1871 | dm_table_add_target_callbacks(ti->table, &rs->callbacks); |
| 1872 | |
Jonathan Brassow | 3273727 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 1873 | mddev_suspend(&rs->md); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1874 | return 0; |
| 1875 | |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 1876 | size_mismatch: |
| 1877 | md_stop(&rs->md); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1878 | bad: |
| 1879 | context_free(rs); |
| 1880 | |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 1881 | return r; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1882 | } |
| 1883 | |
| 1884 | static void raid_dtr(struct dm_target *ti) |
| 1885 | { |
| 1886 | struct raid_set *rs = ti->private; |
| 1887 | |
| 1888 | list_del_init(&rs->callbacks.list); |
| 1889 | md_stop(&rs->md); |
| 1890 | context_free(rs); |
| 1891 | } |
| 1892 | |
Mikulas Patocka | 7de3ee5 | 2012-12-21 20:23:41 +0000 | [diff] [blame] | 1893 | static int raid_map(struct dm_target *ti, struct bio *bio) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1894 | { |
| 1895 | struct raid_set *rs = ti->private; |
NeilBrown | fd01b88 | 2011-10-11 16:47:53 +1100 | [diff] [blame] | 1896 | struct mddev *mddev = &rs->md; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1897 | |
| 1898 | mddev->pers->make_request(mddev, bio); |
| 1899 | |
| 1900 | return DM_MAPIO_SUBMITTED; |
| 1901 | } |
| 1902 | |
Jonathan Brassow | be83651 | 2013-04-24 11:42:43 +1000 | [diff] [blame] | 1903 | static const char *decipher_sync_action(struct mddev *mddev) |
| 1904 | { |
| 1905 | if (test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) |
| 1906 | return "frozen"; |
| 1907 | |
| 1908 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
| 1909 | (!mddev->ro && test_bit(MD_RECOVERY_NEEDED, &mddev->recovery))) { |
| 1910 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) |
| 1911 | return "reshape"; |
| 1912 | |
| 1913 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
| 1914 | if (!test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) |
| 1915 | return "resync"; |
| 1916 | else if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) |
| 1917 | return "check"; |
| 1918 | return "repair"; |
| 1919 | } |
| 1920 | |
| 1921 | if (test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) |
| 1922 | return "recover"; |
| 1923 | } |
| 1924 | |
| 1925 | return "idle"; |
| 1926 | } |
| 1927 | |
Mikulas Patocka | fd7c092 | 2013-03-01 22:45:44 +0000 | [diff] [blame] | 1928 | static void raid_status(struct dm_target *ti, status_type_t type, |
| 1929 | unsigned status_flags, char *result, unsigned maxlen) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1930 | { |
| 1931 | struct raid_set *rs = ti->private; |
| 1932 | unsigned raid_param_cnt = 1; /* at least 1 for chunksize */ |
| 1933 | unsigned sz = 0; |
Jonathan E Brassow | 2e727c3 | 2011-10-31 20:21:26 +0000 | [diff] [blame] | 1934 | int i, array_in_sync = 0; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1935 | sector_t sync; |
| 1936 | |
| 1937 | switch (type) { |
| 1938 | case STATUSTYPE_INFO: |
| 1939 | DMEMIT("%s %d ", rs->raid_type->name, rs->md.raid_disks); |
| 1940 | |
Heinz Mauelshagen | 676fa5a | 2016-05-19 18:49:29 +0200 | [diff] [blame] | 1941 | if (!rt_is_raid0(rs->raid_type)) { |
Heinz Mauelshagen | 0cf4503 | 2015-04-29 14:03:04 +0200 | [diff] [blame] | 1942 | if (test_bit(MD_RECOVERY_RUNNING, &rs->md.recovery)) |
| 1943 | sync = rs->md.curr_resync_completed; |
| 1944 | else |
| 1945 | sync = rs->md.recovery_cp; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1946 | |
Heinz Mauelshagen | 0cf4503 | 2015-04-29 14:03:04 +0200 | [diff] [blame] | 1947 | if (sync >= rs->md.resync_max_sectors) { |
| 1948 | /* |
| 1949 | * Sync complete. |
| 1950 | */ |
| 1951 | array_in_sync = 1; |
| 1952 | sync = rs->md.resync_max_sectors; |
| 1953 | } else if (test_bit(MD_RECOVERY_REQUESTED, &rs->md.recovery)) { |
| 1954 | /* |
| 1955 | * If "check" or "repair" is occurring, the array has |
| 1956 | * undergone and initial sync and the health characters |
| 1957 | * should not be 'a' anymore. |
| 1958 | */ |
| 1959 | array_in_sync = 1; |
| 1960 | } else { |
| 1961 | /* |
| 1962 | * The array may be doing an initial sync, or it may |
| 1963 | * be rebuilding individual components. If all the |
| 1964 | * devices are In_sync, then it is the array that is |
| 1965 | * being initialized. |
| 1966 | */ |
| 1967 | for (i = 0; i < rs->md.raid_disks; i++) |
| 1968 | if (!test_bit(In_sync, &rs->dev[i].rdev.flags)) |
| 1969 | array_in_sync = 1; |
| 1970 | } |
| 1971 | } else { |
| 1972 | /* RAID0 */ |
Jonathan E Brassow | 2e727c3 | 2011-10-31 20:21:26 +0000 | [diff] [blame] | 1973 | array_in_sync = 1; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1974 | sync = rs->md.resync_max_sectors; |
Jonathan E Brassow | 2e727c3 | 2011-10-31 20:21:26 +0000 | [diff] [blame] | 1975 | } |
Jonathan Brassow | be83651 | 2013-04-24 11:42:43 +1000 | [diff] [blame] | 1976 | |
Jonathan E Brassow | 2e727c3 | 2011-10-31 20:21:26 +0000 | [diff] [blame] | 1977 | /* |
| 1978 | * Status characters: |
| 1979 | * 'D' = Dead/Failed device |
| 1980 | * 'a' = Alive but not in-sync |
| 1981 | * 'A' = Alive and in-sync |
| 1982 | */ |
| 1983 | for (i = 0; i < rs->md.raid_disks; i++) { |
| 1984 | if (test_bit(Faulty, &rs->dev[i].rdev.flags)) |
| 1985 | DMEMIT("D"); |
| 1986 | else if (!array_in_sync || |
| 1987 | !test_bit(In_sync, &rs->dev[i].rdev.flags)) |
| 1988 | DMEMIT("a"); |
| 1989 | else |
| 1990 | DMEMIT("A"); |
| 1991 | } |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 1992 | |
Jonathan E Brassow | 2e727c3 | 2011-10-31 20:21:26 +0000 | [diff] [blame] | 1993 | /* |
| 1994 | * In-sync ratio: |
| 1995 | * The in-sync ratio shows the progress of: |
| 1996 | * - Initializing the array |
| 1997 | * - Rebuilding a subset of devices of the array |
| 1998 | * The user can distinguish between the two by referring |
| 1999 | * to the status characters. |
| 2000 | */ |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2001 | DMEMIT(" %llu/%llu", |
| 2002 | (unsigned long long) sync, |
| 2003 | (unsigned long long) rs->md.resync_max_sectors); |
| 2004 | |
Jonathan Brassow | be83651 | 2013-04-24 11:42:43 +1000 | [diff] [blame] | 2005 | /* |
| 2006 | * Sync action: |
| 2007 | * See Documentation/device-mapper/dm-raid.c for |
| 2008 | * information on each of these states. |
| 2009 | */ |
| 2010 | DMEMIT(" %s", decipher_sync_action(&rs->md)); |
| 2011 | |
| 2012 | /* |
| 2013 | * resync_mismatches/mismatch_cnt |
| 2014 | * This field shows the number of discrepancies found when |
| 2015 | * performing a "check" of the array. |
| 2016 | */ |
| 2017 | DMEMIT(" %llu", |
Jonathan Brassow | c4a3955 | 2013-06-25 01:23:59 -0500 | [diff] [blame] | 2018 | (strcmp(rs->md.last_sync_action, "check")) ? 0 : |
Jonathan Brassow | be83651 | 2013-04-24 11:42:43 +1000 | [diff] [blame] | 2019 | (unsigned long long) |
| 2020 | atomic64_read(&rs->md.resync_mismatches)); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2021 | break; |
| 2022 | case STATUSTYPE_TABLE: |
| 2023 | /* The string you would use to construct this array */ |
Jonathan Brassow | 46bed2b | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 2024 | for (i = 0; i < rs->md.raid_disks; i++) { |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 2025 | if (_test_flag(CTR_FLAG_REBUILD, rs->ctr_flags) && |
Jonathan Brassow | 13c8758 | 2011-08-02 12:32:03 +0100 | [diff] [blame] | 2026 | rs->dev[i].data_dev && |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2027 | !test_bit(In_sync, &rs->dev[i].rdev.flags)) |
Jonathan Brassow | 13c8758 | 2011-08-02 12:32:03 +0100 | [diff] [blame] | 2028 | raid_param_cnt += 2; /* for rebuilds */ |
Jonathan Brassow | 46bed2b | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 2029 | if (rs->dev[i].data_dev && |
| 2030 | test_bit(WriteMostly, &rs->dev[i].rdev.flags)) |
| 2031 | raid_param_cnt += 2; |
| 2032 | } |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2033 | |
Heinz Mauelshagen | c76d53f | 2015-04-29 14:03:00 +0200 | [diff] [blame] | 2034 | raid_param_cnt += (hweight32(rs->ctr_flags & ~CTR_FLAG_REBUILD) * 2); |
| 2035 | if (rs->ctr_flags & (CTR_FLAG_SYNC | CTR_FLAG_NOSYNC)) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2036 | raid_param_cnt--; |
| 2037 | |
| 2038 | DMEMIT("%s %u %u", rs->raid_type->name, |
| 2039 | raid_param_cnt, rs->md.chunk_sectors); |
| 2040 | |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 2041 | if (_test_flag(CTR_FLAG_SYNC, rs->ctr_flags) && |
| 2042 | rs->md.recovery_cp == MaxSector) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2043 | DMEMIT(" sync"); |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 2044 | if (_test_flag(CTR_FLAG_NOSYNC, rs->ctr_flags)) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2045 | DMEMIT(" nosync"); |
| 2046 | |
| 2047 | for (i = 0; i < rs->md.raid_disks; i++) |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 2048 | if (_test_flag(CTR_FLAG_REBUILD, rs->ctr_flags) && |
Jonathan Brassow | 13c8758 | 2011-08-02 12:32:03 +0100 | [diff] [blame] | 2049 | rs->dev[i].data_dev && |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2050 | !test_bit(In_sync, &rs->dev[i].rdev.flags)) |
| 2051 | DMEMIT(" rebuild %u", i); |
| 2052 | |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 2053 | if (_test_flag(CTR_FLAG_DAEMON_SLEEP, rs->ctr_flags)) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2054 | DMEMIT(" daemon_sleep %lu", |
| 2055 | rs->md.bitmap_info.daemon_sleep); |
| 2056 | |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 2057 | if (_test_flag(CTR_FLAG_MIN_RECOVERY_RATE, rs->ctr_flags)) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2058 | DMEMIT(" min_recovery_rate %d", rs->md.sync_speed_min); |
| 2059 | |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 2060 | if (_test_flag(CTR_FLAG_MAX_RECOVERY_RATE, rs->ctr_flags)) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2061 | DMEMIT(" max_recovery_rate %d", rs->md.sync_speed_max); |
| 2062 | |
Jonathan Brassow | 46bed2b | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 2063 | for (i = 0; i < rs->md.raid_disks; i++) |
| 2064 | if (rs->dev[i].data_dev && |
| 2065 | test_bit(WriteMostly, &rs->dev[i].rdev.flags)) |
| 2066 | DMEMIT(" write_mostly %u", i); |
| 2067 | |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 2068 | if (_test_flag(CTR_FLAG_MAX_WRITE_BEHIND, rs->ctr_flags)) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2069 | DMEMIT(" max_write_behind %lu", |
| 2070 | rs->md.bitmap_info.max_write_behind); |
| 2071 | |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 2072 | if (_test_flag(CTR_FLAG_STRIPE_CACHE, rs->ctr_flags)) { |
NeilBrown | d1688a6 | 2011-10-11 16:49:52 +1100 | [diff] [blame] | 2073 | struct r5conf *conf = rs->md.private; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2074 | |
| 2075 | /* convert from kiB to sectors */ |
| 2076 | DMEMIT(" stripe_cache %d", |
| 2077 | conf ? conf->max_nr_stripes * 2 : 0); |
| 2078 | } |
| 2079 | |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 2080 | if (_test_flag(CTR_FLAG_REGION_SIZE, rs->ctr_flags)) |
Jonathan Brassow | c108456 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 2081 | DMEMIT(" region_size %lu", |
| 2082 | rs->md.bitmap_info.chunksize >> 9); |
| 2083 | |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 2084 | if (_test_flag(CTR_FLAG_RAID10_COPIES, rs->ctr_flags)) |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 2085 | DMEMIT(" raid10_copies %u", |
| 2086 | raid10_md_layout_to_copies(rs->md.layout)); |
| 2087 | |
Heinz Mauelshagen | ad51d7f | 2016-05-19 18:49:28 +0200 | [diff] [blame] | 2088 | if (_test_flag(CTR_FLAG_RAID10_FORMAT, rs->ctr_flags)) |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 2089 | DMEMIT(" raid10_format %s", |
| 2090 | raid10_md_layout_to_format(rs->md.layout)); |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 2091 | |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2092 | DMEMIT(" %d", rs->md.raid_disks); |
| 2093 | for (i = 0; i < rs->md.raid_disks; i++) { |
Jonathan Brassow | b12d437 | 2011-08-02 12:32:07 +0100 | [diff] [blame] | 2094 | if (rs->dev[i].meta_dev) |
| 2095 | DMEMIT(" %s", rs->dev[i].meta_dev->name); |
| 2096 | else |
| 2097 | DMEMIT(" -"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2098 | |
| 2099 | if (rs->dev[i].data_dev) |
| 2100 | DMEMIT(" %s", rs->dev[i].data_dev->name); |
| 2101 | else |
| 2102 | DMEMIT(" -"); |
| 2103 | } |
| 2104 | } |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2105 | } |
| 2106 | |
Jonathan Brassow | be83651 | 2013-04-24 11:42:43 +1000 | [diff] [blame] | 2107 | static int raid_message(struct dm_target *ti, unsigned argc, char **argv) |
| 2108 | { |
| 2109 | struct raid_set *rs = ti->private; |
| 2110 | struct mddev *mddev = &rs->md; |
| 2111 | |
| 2112 | if (!strcasecmp(argv[0], "reshape")) { |
| 2113 | DMERR("Reshape not supported."); |
| 2114 | return -EINVAL; |
| 2115 | } |
| 2116 | |
| 2117 | if (!mddev->pers || !mddev->pers->sync_request) |
| 2118 | return -EINVAL; |
| 2119 | |
| 2120 | if (!strcasecmp(argv[0], "frozen")) |
| 2121 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
| 2122 | else |
| 2123 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
| 2124 | |
| 2125 | if (!strcasecmp(argv[0], "idle") || !strcasecmp(argv[0], "frozen")) { |
| 2126 | if (mddev->sync_thread) { |
| 2127 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
| 2128 | md_reap_sync_thread(mddev); |
| 2129 | } |
| 2130 | } else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
| 2131 | test_bit(MD_RECOVERY_NEEDED, &mddev->recovery)) |
| 2132 | return -EBUSY; |
| 2133 | else if (!strcasecmp(argv[0], "resync")) |
| 2134 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
| 2135 | else if (!strcasecmp(argv[0], "recover")) { |
| 2136 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
| 2137 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
| 2138 | } else { |
| 2139 | if (!strcasecmp(argv[0], "check")) |
| 2140 | set_bit(MD_RECOVERY_CHECK, &mddev->recovery); |
| 2141 | else if (!!strcasecmp(argv[0], "repair")) |
| 2142 | return -EINVAL; |
| 2143 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
| 2144 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
| 2145 | } |
| 2146 | if (mddev->ro == 2) { |
| 2147 | /* A write to sync_action is enough to justify |
| 2148 | * canceling read-auto mode |
| 2149 | */ |
| 2150 | mddev->ro = 0; |
| 2151 | if (!mddev->suspended) |
| 2152 | md_wakeup_thread(mddev->sync_thread); |
| 2153 | } |
| 2154 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
| 2155 | if (!mddev->suspended) |
| 2156 | md_wakeup_thread(mddev->thread); |
| 2157 | |
| 2158 | return 0; |
| 2159 | } |
| 2160 | |
| 2161 | static int raid_iterate_devices(struct dm_target *ti, |
| 2162 | iterate_devices_callout_fn fn, void *data) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2163 | { |
| 2164 | struct raid_set *rs = ti->private; |
| 2165 | unsigned i; |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 2166 | int r = 0; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2167 | |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 2168 | for (i = 0; !r && i < rs->md.raid_disks; i++) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2169 | if (rs->dev[i].data_dev) |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 2170 | r = fn(ti, |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2171 | rs->dev[i].data_dev, |
| 2172 | 0, /* No offset on data devs */ |
| 2173 | rs->md.dev_sectors, |
| 2174 | data); |
| 2175 | |
Heinz Mauelshagen | 73c6f23 | 2016-05-19 18:49:24 +0200 | [diff] [blame] | 2176 | return r; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2177 | } |
| 2178 | |
| 2179 | static void raid_io_hints(struct dm_target *ti, struct queue_limits *limits) |
| 2180 | { |
| 2181 | struct raid_set *rs = ti->private; |
| 2182 | unsigned chunk_size = rs->md.chunk_sectors << 9; |
NeilBrown | d1688a6 | 2011-10-11 16:49:52 +1100 | [diff] [blame] | 2183 | struct r5conf *conf = rs->md.private; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2184 | |
| 2185 | blk_limits_io_min(limits, chunk_size); |
| 2186 | blk_limits_io_opt(limits, chunk_size * (conf->raid_disks - conf->max_degraded)); |
| 2187 | } |
| 2188 | |
| 2189 | static void raid_presuspend(struct dm_target *ti) |
| 2190 | { |
| 2191 | struct raid_set *rs = ti->private; |
| 2192 | |
| 2193 | md_stop_writes(&rs->md); |
| 2194 | } |
| 2195 | |
| 2196 | static void raid_postsuspend(struct dm_target *ti) |
| 2197 | { |
| 2198 | struct raid_set *rs = ti->private; |
| 2199 | |
| 2200 | mddev_suspend(&rs->md); |
| 2201 | } |
| 2202 | |
Jonathan Brassow | f381e71 | 2013-05-08 17:57:13 -0500 | [diff] [blame] | 2203 | static void attempt_restore_of_faulty_devices(struct raid_set *rs) |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2204 | { |
Jonathan Brassow | 9092c02 | 2013-05-02 14:19:24 -0500 | [diff] [blame] | 2205 | int i; |
| 2206 | uint64_t failed_devices, cleared_failed_devices = 0; |
| 2207 | unsigned long flags; |
| 2208 | struct dm_raid_superblock *sb; |
Jonathan Brassow | 9092c02 | 2013-05-02 14:19:24 -0500 | [diff] [blame] | 2209 | struct md_rdev *r; |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2210 | |
Jonathan Brassow | f381e71 | 2013-05-08 17:57:13 -0500 | [diff] [blame] | 2211 | for (i = 0; i < rs->md.raid_disks; i++) { |
| 2212 | r = &rs->dev[i].rdev; |
| 2213 | if (test_bit(Faulty, &r->flags) && r->sb_page && |
Mike Christie | 796a5cf | 2016-06-05 14:32:07 -0500 | [diff] [blame] | 2214 | sync_page_io(r, 0, r->sb_size, r->sb_page, REQ_OP_READ, 0, |
| 2215 | 1)) { |
Jonathan Brassow | f381e71 | 2013-05-08 17:57:13 -0500 | [diff] [blame] | 2216 | DMINFO("Faulty %s device #%d has readable super block." |
| 2217 | " Attempting to revive it.", |
| 2218 | rs->raid_type->name, i); |
Jonathan Brassow | a4dc163 | 2013-05-08 18:00:54 -0500 | [diff] [blame] | 2219 | |
| 2220 | /* |
| 2221 | * Faulty bit may be set, but sometimes the array can |
| 2222 | * be suspended before the personalities can respond |
| 2223 | * by removing the device from the array (i.e. calling |
| 2224 | * 'hot_remove_disk'). If they haven't yet removed |
| 2225 | * the failed device, its 'raid_disk' number will be |
| 2226 | * '>= 0' - meaning we must call this function |
| 2227 | * ourselves. |
| 2228 | */ |
| 2229 | if ((r->raid_disk >= 0) && |
| 2230 | (r->mddev->pers->hot_remove_disk(r->mddev, r) != 0)) |
| 2231 | /* Failed to revive this device, try next */ |
| 2232 | continue; |
| 2233 | |
Jonathan Brassow | f381e71 | 2013-05-08 17:57:13 -0500 | [diff] [blame] | 2234 | r->raid_disk = i; |
| 2235 | r->saved_raid_disk = i; |
| 2236 | flags = r->flags; |
| 2237 | clear_bit(Faulty, &r->flags); |
| 2238 | clear_bit(WriteErrorSeen, &r->flags); |
| 2239 | clear_bit(In_sync, &r->flags); |
| 2240 | if (r->mddev->pers->hot_add_disk(r->mddev, r)) { |
| 2241 | r->raid_disk = -1; |
| 2242 | r->saved_raid_disk = -1; |
| 2243 | r->flags = flags; |
| 2244 | } else { |
| 2245 | r->recovery_offset = 0; |
| 2246 | cleared_failed_devices |= 1 << i; |
| 2247 | } |
| 2248 | } |
| 2249 | } |
| 2250 | if (cleared_failed_devices) { |
| 2251 | rdev_for_each(r, &rs->md) { |
| 2252 | sb = page_address(r->sb_page); |
| 2253 | failed_devices = le64_to_cpu(sb->failed_devices); |
| 2254 | failed_devices &= ~cleared_failed_devices; |
| 2255 | sb->failed_devices = cpu_to_le64(failed_devices); |
| 2256 | } |
| 2257 | } |
| 2258 | } |
| 2259 | |
| 2260 | static void raid_resume(struct dm_target *ti) |
| 2261 | { |
| 2262 | struct raid_set *rs = ti->private; |
| 2263 | |
Heinz Mauelshagen | 676fa5a | 2016-05-19 18:49:29 +0200 | [diff] [blame] | 2264 | if (!rt_is_raid0(rs->raid_type)) { |
Heinz Mauelshagen | 0cf4503 | 2015-04-29 14:03:04 +0200 | [diff] [blame] | 2265 | set_bit(MD_CHANGE_DEVS, &rs->md.flags); |
| 2266 | |
| 2267 | if (!rs->bitmap_loaded) { |
| 2268 | bitmap_load(&rs->md); |
| 2269 | rs->bitmap_loaded = 1; |
| 2270 | } else { |
| 2271 | /* |
| 2272 | * A secondary resume while the device is active. |
| 2273 | * Take this opportunity to check whether any failed |
| 2274 | * devices are reachable again. |
| 2275 | */ |
| 2276 | attempt_restore_of_faulty_devices(rs); |
| 2277 | } |
| 2278 | |
| 2279 | clear_bit(MD_RECOVERY_FROZEN, &rs->md.recovery); |
Jonathan Brassow | 47525e5 | 2012-05-22 13:55:29 +1000 | [diff] [blame] | 2280 | } |
Jonathan Brassow | 34f8ac6d | 2012-01-27 14:53:53 -0600 | [diff] [blame] | 2281 | |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2282 | mddev_resume(&rs->md); |
| 2283 | } |
| 2284 | |
| 2285 | static struct target_type raid_target = { |
| 2286 | .name = "raid", |
Heinz Mauelshagen | 702108d | 2016-05-19 18:49:26 +0200 | [diff] [blame] | 2287 | .version = {1, 8, 1}, |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2288 | .module = THIS_MODULE, |
| 2289 | .ctr = raid_ctr, |
| 2290 | .dtr = raid_dtr, |
| 2291 | .map = raid_map, |
| 2292 | .status = raid_status, |
Jonathan Brassow | be83651 | 2013-04-24 11:42:43 +1000 | [diff] [blame] | 2293 | .message = raid_message, |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2294 | .iterate_devices = raid_iterate_devices, |
| 2295 | .io_hints = raid_io_hints, |
| 2296 | .presuspend = raid_presuspend, |
| 2297 | .postsuspend = raid_postsuspend, |
| 2298 | .resume = raid_resume, |
| 2299 | }; |
| 2300 | |
| 2301 | static int __init dm_raid_init(void) |
| 2302 | { |
Jonathan Brassow | fe5d2f4 | 2013-02-21 13:28:10 +1100 | [diff] [blame] | 2303 | DMINFO("Loading target version %u.%u.%u", |
| 2304 | raid_target.version[0], |
| 2305 | raid_target.version[1], |
| 2306 | raid_target.version[2]); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2307 | return dm_register_target(&raid_target); |
| 2308 | } |
| 2309 | |
| 2310 | static void __exit dm_raid_exit(void) |
| 2311 | { |
| 2312 | dm_unregister_target(&raid_target); |
| 2313 | } |
| 2314 | |
| 2315 | module_init(dm_raid_init); |
| 2316 | module_exit(dm_raid_exit); |
| 2317 | |
Heinz Mauelshagen | 48cf06b | 2014-09-24 17:47:19 +0200 | [diff] [blame] | 2318 | module_param(devices_handle_discard_safely, bool, 0644); |
| 2319 | MODULE_PARM_DESC(devices_handle_discard_safely, |
| 2320 | "Set to Y if all devices in each array reliably return zeroes on reads from discarded regions"); |
| 2321 | |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2322 | MODULE_DESCRIPTION(DM_NAME " raid4/5/6 target"); |
Jonathan Brassow | 63f33b8d | 2012-07-31 21:44:26 -0500 | [diff] [blame] | 2323 | MODULE_ALIAS("dm-raid1"); |
| 2324 | MODULE_ALIAS("dm-raid10"); |
NeilBrown | 9d09e66 | 2011-01-13 20:00:02 +0000 | [diff] [blame] | 2325 | MODULE_ALIAS("dm-raid4"); |
| 2326 | MODULE_ALIAS("dm-raid5"); |
| 2327 | MODULE_ALIAS("dm-raid6"); |
| 2328 | MODULE_AUTHOR("Neil Brown <dm-devel@redhat.com>"); |
| 2329 | MODULE_LICENSE("GPL"); |