git.sesse.net Git - bcachefs-tools-debian/blob - c_src/libbcachefs/sb-members.c

   1 // SPDX-License-Identifier: GPL-2.0
   2
   3 #include "bcachefs.h"
   4 #include "disk_groups.h"
   5 #include "opts.h"
   6 #include "replicas.h"
   7 #include "sb-members.h"
   8 #include "super-io.h"
   9
  10 #define x(t, n, ...) [n] = #t,
  11 static const char * const bch2_iops_measurements[] = {
  12         BCH_IOPS_MEASUREMENTS()
  13         NULL
  14 };
  15
  16 char * const bch2_member_error_strs[] = {
  17         BCH_MEMBER_ERROR_TYPES()
  18         NULL
  19 };
  20 #undef x
  21
  22 /* Code for bch_sb_field_members_v1: */
  23
  24 struct bch_member *bch2_members_v2_get_mut(struct bch_sb *sb, int i)
  25 {
  26         return __bch2_members_v2_get_mut(bch2_sb_field_get(sb, members_v2), i);
  27 }
  28
  29 static struct bch_member members_v2_get(struct bch_sb_field_members_v2 *mi, int i)
  30 {
  31         struct bch_member ret, *p = __bch2_members_v2_get_mut(mi, i);
  32         memset(&ret, 0, sizeof(ret));
  33         memcpy(&ret, p, min_t(size_t, le16_to_cpu(mi->member_bytes), sizeof(ret)));
  34         return ret;
  35 }
  36
  37 static struct bch_member *members_v1_get_mut(struct bch_sb_field_members_v1 *mi, int i)
  38 {
  39         return (void *) mi->_members + (i * BCH_MEMBER_V1_BYTES);
  40 }
  41
  42 static struct bch_member members_v1_get(struct bch_sb_field_members_v1 *mi, int i)
  43 {
  44         struct bch_member ret, *p = members_v1_get_mut(mi, i);
  45         memset(&ret, 0, sizeof(ret));
  46         memcpy(&ret, p, min_t(size_t, BCH_MEMBER_V1_BYTES, sizeof(ret)));
  47         return ret;
  48 }
  49
  50 struct bch_member bch2_sb_member_get(struct bch_sb *sb, int i)
  51 {
  52         struct bch_sb_field_members_v2 *mi2 = bch2_sb_field_get(sb, members_v2);
  53         if (mi2)
  54                 return members_v2_get(mi2, i);
  55         struct bch_sb_field_members_v1 *mi1 = bch2_sb_field_get(sb, members_v1);
  56         return members_v1_get(mi1, i);
  57 }
  58
  59 static int sb_members_v2_resize_entries(struct bch_fs *c)
  60 {
  61         struct bch_sb_field_members_v2 *mi = bch2_sb_field_get(c->disk_sb.sb, members_v2);
  62
  63         if (le16_to_cpu(mi->member_bytes) < sizeof(struct bch_member)) {
  64                 unsigned u64s = DIV_ROUND_UP((sizeof(*mi) + sizeof(mi->_members[0]) *
  65                                               c->disk_sb.sb->nr_devices), 8);
  66
  67                 mi = bch2_sb_field_resize(&c->disk_sb, members_v2, u64s);
  68                 if (!mi)
  69                         return -BCH_ERR_ENOSPC_sb_members_v2;
  70
  71                 for (int i = c->disk_sb.sb->nr_devices - 1; i >= 0; --i) {
  72                         void *dst = (void *) mi->_members + (i * sizeof(struct bch_member));
  73                         memmove(dst, __bch2_members_v2_get_mut(mi, i), le16_to_cpu(mi->member_bytes));
  74                         memset(dst + le16_to_cpu(mi->member_bytes),
  75                                0, (sizeof(struct bch_member) - le16_to_cpu(mi->member_bytes)));
  76                 }
  77                 mi->member_bytes = cpu_to_le16(sizeof(struct bch_member));
  78         }
  79         return 0;
  80 }
  81
  82 int bch2_sb_members_v2_init(struct bch_fs *c)
  83 {
  84         struct bch_sb_field_members_v1 *mi1;
  85         struct bch_sb_field_members_v2 *mi2;
  86
  87         if (!bch2_sb_field_get(c->disk_sb.sb, members_v2)) {
  88                 mi2 = bch2_sb_field_resize(&c->disk_sb, members_v2,
  89                                 DIV_ROUND_UP(sizeof(*mi2) +
  90                                              sizeof(struct bch_member) * c->sb.nr_devices,
  91                                              sizeof(u64)));
  92                 mi1 = bch2_sb_field_get(c->disk_sb.sb, members_v1);
  93                 memcpy(&mi2->_members[0], &mi1->_members[0],
  94                        BCH_MEMBER_V1_BYTES * c->sb.nr_devices);
  95                 memset(&mi2->pad[0], 0, sizeof(mi2->pad));
  96                 mi2->member_bytes = cpu_to_le16(BCH_MEMBER_V1_BYTES);
  97         }
  98
  99         return sb_members_v2_resize_entries(c);
 100 }
 101
 102 int bch2_sb_members_cpy_v2_v1(struct bch_sb_handle *disk_sb)
 103 {
 104         struct bch_sb_field_members_v1 *mi1;
 105         struct bch_sb_field_members_v2 *mi2;
 106
 107         mi1 = bch2_sb_field_resize(disk_sb, members_v1,
 108                         DIV_ROUND_UP(sizeof(*mi1) + BCH_MEMBER_V1_BYTES *
 109                                      disk_sb->sb->nr_devices, sizeof(u64)));
 110         if (!mi1)
 111                 return -BCH_ERR_ENOSPC_sb_members;
 112
 113         mi2 = bch2_sb_field_get(disk_sb->sb, members_v2);
 114
 115         for (unsigned i = 0; i < disk_sb->sb->nr_devices; i++)
 116                 memcpy(members_v1_get_mut(mi1, i), __bch2_members_v2_get_mut(mi2, i), BCH_MEMBER_V1_BYTES);
 117
 118         return 0;
 119 }
 120
 121 static int validate_member(struct printbuf *err,
 122                            struct bch_member m,
 123                            struct bch_sb *sb,
 124                            int i)
 125 {
 126         if (le64_to_cpu(m.nbuckets) > LONG_MAX) {
 127                 prt_printf(err, "device %u: too many buckets (got %llu, max %lu)",
 128                            i, le64_to_cpu(m.nbuckets), LONG_MAX);
 129                 return -BCH_ERR_invalid_sb_members;
 130         }
 131
 132         if (le64_to_cpu(m.nbuckets) -
 133             le16_to_cpu(m.first_bucket) < BCH_MIN_NR_NBUCKETS) {
 134                 prt_printf(err, "device %u: not enough buckets (got %llu, max %u)",
 135                            i, le64_to_cpu(m.nbuckets), BCH_MIN_NR_NBUCKETS);
 136                 return -BCH_ERR_invalid_sb_members;
 137         }
 138
 139         if (le16_to_cpu(m.bucket_size) <
 140             le16_to_cpu(sb->block_size)) {
 141                 prt_printf(err, "device %u: bucket size %u smaller than block size %u",
 142                            i, le16_to_cpu(m.bucket_size), le16_to_cpu(sb->block_size));
 143                 return -BCH_ERR_invalid_sb_members;
 144         }
 145
 146         if (le16_to_cpu(m.bucket_size) <
 147             BCH_SB_BTREE_NODE_SIZE(sb)) {
 148                 prt_printf(err, "device %u: bucket size %u smaller than btree node size %llu",
 149                            i, le16_to_cpu(m.bucket_size), BCH_SB_BTREE_NODE_SIZE(sb));
 150                 return -BCH_ERR_invalid_sb_members;
 151         }
 152
 153         return 0;
 154 }
 155
 156 static void member_to_text(struct printbuf *out,
 157                            struct bch_member m,
 158                            struct bch_sb_field_disk_groups *gi,
 159                            struct bch_sb *sb,
 160                            int i)
 161 {
 162         unsigned data_have = bch2_sb_dev_has_data(sb, i);
 163         u64 bucket_size = le16_to_cpu(m.bucket_size);
 164         u64 device_size = le64_to_cpu(m.nbuckets) * bucket_size;
 165
 166         if (!bch2_member_exists(&m))
 167                 return;
 168
 169         prt_printf(out, "Device:");
 170         prt_tab(out);
 171         prt_printf(out, "%u", i);
 172         prt_newline(out);
 173
 174         printbuf_indent_add(out, 2);
 175
 176         prt_printf(out, "Label:");
 177         prt_tab(out);
 178         if (BCH_MEMBER_GROUP(&m)) {
 179                 unsigned idx = BCH_MEMBER_GROUP(&m) - 1;
 180
 181                 if (idx < disk_groups_nr(gi))
 182                         prt_printf(out, "%s (%u)",
 183                                    gi->entries[idx].label, idx);
 184                 else
 185                         prt_printf(out, "(bad disk labels section)");
 186         } else {
 187                 prt_printf(out, "(none)");
 188         }
 189         prt_newline(out);
 190
 191         prt_printf(out, "UUID:");
 192         prt_tab(out);
 193         pr_uuid(out, m.uuid.b);
 194         prt_newline(out);
 195
 196         prt_printf(out, "Size:");
 197         prt_tab(out);
 198         prt_units_u64(out, device_size << 9);
 199         prt_newline(out);
 200
 201         for (unsigned i = 0; i < BCH_MEMBER_ERROR_NR; i++) {
 202                 prt_printf(out, "%s errors:", bch2_member_error_strs[i]);
 203                 prt_tab(out);
 204                 prt_u64(out, le64_to_cpu(m.errors[i]));
 205                 prt_newline(out);
 206         }
 207
 208         for (unsigned i = 0; i < BCH_IOPS_NR; i++) {
 209                 prt_printf(out, "%s iops:", bch2_iops_measurements[i]);
 210                 prt_tab(out);
 211                 prt_printf(out, "%u", le32_to_cpu(m.iops[i]));
 212                 prt_newline(out);
 213         }
 214
 215         prt_printf(out, "Bucket size:");
 216         prt_tab(out);
 217         prt_units_u64(out, bucket_size << 9);
 218         prt_newline(out);
 219
 220         prt_printf(out, "First bucket:");
 221         prt_tab(out);
 222         prt_printf(out, "%u", le16_to_cpu(m.first_bucket));
 223         prt_newline(out);
 224
 225         prt_printf(out, "Buckets:");
 226         prt_tab(out);
 227         prt_printf(out, "%llu", le64_to_cpu(m.nbuckets));
 228         prt_newline(out);
 229
 230         prt_printf(out, "Last mount:");
 231         prt_tab(out);
 232         if (m.last_mount)
 233                 bch2_prt_datetime(out, le64_to_cpu(m.last_mount));
 234         else
 235                 prt_printf(out, "(never)");
 236         prt_newline(out);
 237
 238         prt_printf(out, "Last superblock write:");
 239         prt_tab(out);
 240         prt_u64(out, le64_to_cpu(m.seq));
 241         prt_newline(out);
 242
 243         prt_printf(out, "State:");
 244         prt_tab(out);
 245         prt_printf(out, "%s",
 246                    BCH_MEMBER_STATE(&m) < BCH_MEMBER_STATE_NR
 247                    ? bch2_member_states[BCH_MEMBER_STATE(&m)]
 248                    : "unknown");
 249         prt_newline(out);
 250
 251         prt_printf(out, "Data allowed:");
 252         prt_tab(out);
 253         if (BCH_MEMBER_DATA_ALLOWED(&m))
 254                 prt_bitflags(out, bch2_data_types, BCH_MEMBER_DATA_ALLOWED(&m));
 255         else
 256                 prt_printf(out, "(none)");
 257         prt_newline(out);
 258
 259         prt_printf(out, "Has data:");
 260         prt_tab(out);
 261         if (data_have)
 262                 prt_bitflags(out, bch2_data_types, data_have);
 263         else
 264                 prt_printf(out, "(none)");
 265         prt_newline(out);
 266
 267         prt_str(out, "Durability:");
 268         prt_tab(out);
 269         prt_printf(out, "%llu", BCH_MEMBER_DURABILITY(&m) ? BCH_MEMBER_DURABILITY(&m) - 1 : 1);
 270         prt_newline(out);
 271
 272         prt_printf(out, "Discard:");
 273         prt_tab(out);
 274         prt_printf(out, "%llu", BCH_MEMBER_DISCARD(&m));
 275         prt_newline(out);
 276
 277         prt_printf(out, "Freespace initialized:");
 278         prt_tab(out);
 279         prt_printf(out, "%llu", BCH_MEMBER_FREESPACE_INITIALIZED(&m));
 280         prt_newline(out);
 281
 282         printbuf_indent_sub(out, 2);
 283 }
 284
 285 static int bch2_sb_members_v1_validate(struct bch_sb *sb,
 286                                     struct bch_sb_field *f,
 287                                     struct printbuf *err)
 288 {
 289         struct bch_sb_field_members_v1 *mi = field_to_type(f, members_v1);
 290         unsigned i;
 291
 292         if ((void *) members_v1_get_mut(mi, sb->nr_devices) > vstruct_end(&mi->field)) {
 293                 prt_printf(err, "too many devices for section size");
 294                 return -BCH_ERR_invalid_sb_members;
 295         }
 296
 297         for (i = 0; i < sb->nr_devices; i++) {
 298                 struct bch_member m = members_v1_get(mi, i);
 299
 300                 int ret = validate_member(err, m, sb, i);
 301                 if (ret)
 302                         return ret;
 303         }
 304
 305         return 0;
 306 }
 307
 308 static void bch2_sb_members_v1_to_text(struct printbuf *out, struct bch_sb *sb,
 309                                        struct bch_sb_field *f)
 310 {
 311         struct bch_sb_field_members_v1 *mi = field_to_type(f, members_v1);
 312         struct bch_sb_field_disk_groups *gi = bch2_sb_field_get(sb, disk_groups);
 313         unsigned i;
 314
 315         for (i = 0; i < sb->nr_devices; i++)
 316                 member_to_text(out, members_v1_get(mi, i), gi, sb, i);
 317 }
 318
 319 const struct bch_sb_field_ops bch_sb_field_ops_members_v1 = {
 320         .validate       = bch2_sb_members_v1_validate,
 321         .to_text        = bch2_sb_members_v1_to_text,
 322 };
 323
 324 static void bch2_sb_members_v2_to_text(struct printbuf *out, struct bch_sb *sb,
 325                                        struct bch_sb_field *f)
 326 {
 327         struct bch_sb_field_members_v2 *mi = field_to_type(f, members_v2);
 328         struct bch_sb_field_disk_groups *gi = bch2_sb_field_get(sb, disk_groups);
 329         unsigned i;
 330
 331         for (i = 0; i < sb->nr_devices; i++)
 332                 member_to_text(out, members_v2_get(mi, i), gi, sb, i);
 333 }
 334
 335 static int bch2_sb_members_v2_validate(struct bch_sb *sb,
 336                                        struct bch_sb_field *f,
 337                                        struct printbuf *err)
 338 {
 339         struct bch_sb_field_members_v2 *mi = field_to_type(f, members_v2);
 340         size_t mi_bytes = (void *) __bch2_members_v2_get_mut(mi, sb->nr_devices) -
 341                 (void *) mi;
 342
 343         if (mi_bytes > vstruct_bytes(&mi->field)) {
 344                 prt_printf(err, "section too small (%zu > %zu)",
 345                            mi_bytes, vstruct_bytes(&mi->field));
 346                 return -BCH_ERR_invalid_sb_members;
 347         }
 348
 349         for (unsigned i = 0; i < sb->nr_devices; i++) {
 350                 int ret = validate_member(err, members_v2_get(mi, i), sb, i);
 351                 if (ret)
 352                         return ret;
 353         }
 354
 355         return 0;
 356 }
 357
 358 const struct bch_sb_field_ops bch_sb_field_ops_members_v2 = {
 359         .validate       = bch2_sb_members_v2_validate,
 360         .to_text        = bch2_sb_members_v2_to_text,
 361 };
 362
 363 void bch2_sb_members_from_cpu(struct bch_fs *c)
 364 {
 365         struct bch_sb_field_members_v2 *mi = bch2_sb_field_get(c->disk_sb.sb, members_v2);
 366
 367         rcu_read_lock();
 368         for_each_member_device_rcu(c, ca, NULL) {
 369                 struct bch_member *m = __bch2_members_v2_get_mut(mi, ca->dev_idx);
 370
 371                 for (unsigned e = 0; e < BCH_MEMBER_ERROR_NR; e++)
 372                         m->errors[e] = cpu_to_le64(atomic64_read(&ca->errors[e]));
 373         }
 374         rcu_read_unlock();
 375 }
 376
 377 void bch2_dev_io_errors_to_text(struct printbuf *out, struct bch_dev *ca)
 378 {
 379         struct bch_fs *c = ca->fs;
 380         struct bch_member m;
 381
 382         mutex_lock(&ca->fs->sb_lock);
 383         m = bch2_sb_member_get(c->disk_sb.sb, ca->dev_idx);
 384         mutex_unlock(&ca->fs->sb_lock);
 385
 386         printbuf_tabstop_push(out, 12);
 387
 388         prt_str(out, "IO errors since filesystem creation");
 389         prt_newline(out);
 390
 391         printbuf_indent_add(out, 2);
 392         for (unsigned i = 0; i < BCH_MEMBER_ERROR_NR; i++) {
 393                 prt_printf(out, "%s:", bch2_member_error_strs[i]);
 394                 prt_tab(out);
 395                 prt_u64(out, atomic64_read(&ca->errors[i]));
 396                 prt_newline(out);
 397         }
 398         printbuf_indent_sub(out, 2);
 399
 400         prt_str(out, "IO errors since ");
 401         bch2_pr_time_units(out, (ktime_get_real_seconds() - le64_to_cpu(m.errors_reset_time)) * NSEC_PER_SEC);
 402         prt_str(out, " ago");
 403         prt_newline(out);
 404
 405         printbuf_indent_add(out, 2);
 406         for (unsigned i = 0; i < BCH_MEMBER_ERROR_NR; i++) {
 407                 prt_printf(out, "%s:", bch2_member_error_strs[i]);
 408                 prt_tab(out);
 409                 prt_u64(out, atomic64_read(&ca->errors[i]) - le64_to_cpu(m.errors_at_reset[i]));
 410                 prt_newline(out);
 411         }
 412         printbuf_indent_sub(out, 2);
 413 }
 414
 415 void bch2_dev_errors_reset(struct bch_dev *ca)
 416 {
 417         struct bch_fs *c = ca->fs;
 418         struct bch_member *m;
 419
 420         mutex_lock(&c->sb_lock);
 421         m = bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx);
 422         for (unsigned i = 0; i < ARRAY_SIZE(m->errors_at_reset); i++)
 423                 m->errors_at_reset[i] = cpu_to_le64(atomic64_read(&ca->errors[i]));
 424         m->errors_reset_time = ktime_get_real_seconds();
 425
 426         bch2_write_super(c);
 427         mutex_unlock(&c->sb_lock);
 428 }