git.sesse.net Git - bcachefs-tools-debian/blob - 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 /* Code for bch_sb_field_members_v1: */
  11
  12 static struct bch_member *members_v2_get_mut(struct bch_sb_field_members_v2 *mi, int i)
  13 {
  14         return (void *) mi->_members + (i * le16_to_cpu(mi->member_bytes));
  15 }
  16
  17 struct bch_member *bch2_members_v2_get_mut(struct bch_sb *sb, int i)
  18 {
  19         return members_v2_get_mut(bch2_sb_field_get(sb, members_v2), i);
  20 }
  21
  22 static struct bch_member members_v2_get(struct bch_sb_field_members_v2 *mi, int i)
  23 {
  24         struct bch_member ret, *p = members_v2_get_mut(mi, i);
  25         memset(&ret, 0, sizeof(ret));
  26         memcpy(&ret, p, min_t(size_t, le16_to_cpu(mi->member_bytes), sizeof(ret)));
  27         return ret;
  28 }
  29
  30 static struct bch_member *members_v1_get_mut(struct bch_sb_field_members_v1 *mi, int i)
  31 {
  32         return (void *) mi->_members + (i * BCH_MEMBER_V1_BYTES);
  33 }
  34
  35 static struct bch_member members_v1_get(struct bch_sb_field_members_v1 *mi, int i)
  36 {
  37         struct bch_member ret, *p = members_v1_get_mut(mi, i);
  38         memset(&ret, 0, sizeof(ret));
  39         memcpy(&ret, p, min_t(size_t, sizeof(struct bch_member), sizeof(ret))); return ret;
  40 }
  41
  42 struct bch_member bch2_sb_member_get(struct bch_sb *sb, int i)
  43 {
  44         struct bch_sb_field_members_v2 *mi2 = bch2_sb_field_get(sb, members_v2);
  45         if (mi2)
  46                 return members_v2_get(mi2, i);
  47         struct bch_sb_field_members_v1 *mi1 = bch2_sb_field_get(sb, members_v1);
  48         return members_v1_get(mi1, i);
  49 }
  50
  51 static int sb_members_v2_resize_entries(struct bch_fs *c)
  52 {
  53         struct bch_sb_field_members_v2 *mi = bch2_sb_field_get(c->disk_sb.sb, members_v2);
  54
  55         if (le16_to_cpu(mi->member_bytes) < sizeof(struct bch_member)) {
  56                 unsigned u64s = DIV_ROUND_UP((sizeof(*mi) + sizeof(mi->_members[0]) *
  57                                               c->disk_sb.sb->nr_devices), 8);
  58
  59                 mi = bch2_sb_field_resize(&c->disk_sb, members_v2, u64s);
  60                 if (!mi)
  61                         return -BCH_ERR_ENOSPC_sb_members_v2;
  62
  63                 for (int i = c->disk_sb.sb->nr_devices - 1; i >= 0; --i) {
  64                         void *dst = (void *) mi->_members + (i * sizeof(struct bch_member));
  65                         memmove(dst, members_v2_get_mut(mi, i), le16_to_cpu(mi->member_bytes));
  66                         memset(dst + le16_to_cpu(mi->member_bytes),
  67                                0, (sizeof(struct bch_member) - le16_to_cpu(mi->member_bytes)));
  68                 }
  69                 mi->member_bytes = cpu_to_le16(sizeof(struct bch_member));
  70         }
  71         return 0;
  72 }
  73
  74 int bch2_members_v2_init(struct bch_fs *c)
  75 {
  76         struct bch_sb_field_members_v1 *mi1;
  77         struct bch_sb_field_members_v2 *mi2;
  78
  79         if (!bch2_sb_field_get(c->disk_sb.sb, members_v2)) {
  80                 mi2 = bch2_sb_field_resize(&c->disk_sb, members_v2,
  81                                 DIV_ROUND_UP(sizeof(*mi2) +
  82                                              sizeof(struct bch_member) * c->sb.nr_devices,
  83                                              sizeof(u64)));
  84                 mi1 = bch2_sb_field_get(c->disk_sb.sb, members_v1);
  85                 memcpy(&mi2->_members[0], &mi1->_members[0],
  86                        BCH_MEMBER_V1_BYTES * c->sb.nr_devices);
  87                 memset(&mi2->pad[0], 0, sizeof(mi2->pad));
  88                 mi2->member_bytes = cpu_to_le16(BCH_MEMBER_V1_BYTES);
  89         }
  90
  91         return sb_members_v2_resize_entries(c);
  92 }
  93
  94 int bch_members_cpy_v2_v1(struct bch_sb_handle *disk_sb)
  95 {
  96         struct bch_sb_field_members_v1 *mi1;
  97         struct bch_sb_field_members_v2 *mi2;
  98
  99         mi1 = bch2_sb_field_resize(disk_sb, members_v1,
 100                         DIV_ROUND_UP(sizeof(*mi1) + BCH_MEMBER_V1_BYTES *
 101                                      disk_sb->sb->nr_devices, sizeof(u64)));
 102         if (!mi1)
 103                 return -BCH_ERR_ENOSPC_sb_members;
 104
 105         mi2 = bch2_sb_field_get(disk_sb->sb, members_v2);
 106
 107         for (unsigned i = 0; i < disk_sb->sb->nr_devices; i++)
 108                 memcpy(members_v1_get_mut(mi1, i), members_v2_get_mut(mi2, i), BCH_MEMBER_V1_BYTES);
 109
 110         return 0;
 111 }
 112
 113 static int validate_member(struct printbuf *err,
 114                            struct bch_member m,
 115                            struct bch_sb *sb,
 116                            int i)
 117 {
 118         if (le64_to_cpu(m.nbuckets) > LONG_MAX) {
 119                 prt_printf(err, "device %u: too many buckets (got %llu, max %lu)",
 120                            i, le64_to_cpu(m.nbuckets), LONG_MAX);
 121                 return -BCH_ERR_invalid_sb_members;
 122         }
 123
 124         if (le64_to_cpu(m.nbuckets) -
 125             le16_to_cpu(m.first_bucket) < BCH_MIN_NR_NBUCKETS) {
 126                 prt_printf(err, "device %u: not enough buckets (got %llu, max %u)",
 127                            i, le64_to_cpu(m.nbuckets), BCH_MIN_NR_NBUCKETS);
 128                 return -BCH_ERR_invalid_sb_members;
 129         }
 130
 131         if (le16_to_cpu(m.bucket_size) <
 132             le16_to_cpu(sb->block_size)) {
 133                 prt_printf(err, "device %u: bucket size %u smaller than block size %u",
 134                            i, le16_to_cpu(m.bucket_size), le16_to_cpu(sb->block_size));
 135                 return -BCH_ERR_invalid_sb_members;
 136         }
 137
 138         if (le16_to_cpu(m.bucket_size) <
 139             BCH_SB_BTREE_NODE_SIZE(sb)) {
 140                 prt_printf(err, "device %u: bucket size %u smaller than btree node size %llu",
 141                            i, le16_to_cpu(m.bucket_size), BCH_SB_BTREE_NODE_SIZE(sb));
 142                 return -BCH_ERR_invalid_sb_members;
 143         }
 144
 145         return 0;
 146 }
 147
 148 static void member_to_text(struct printbuf *out,
 149                            struct bch_member m,
 150                            struct bch_sb_field_disk_groups *gi,
 151                            struct bch_sb *sb,
 152                            int i)
 153 {
 154         unsigned data_have = bch2_sb_dev_has_data(sb, i);
 155         u64 bucket_size = le16_to_cpu(m.bucket_size);
 156         u64 device_size = le64_to_cpu(m.nbuckets) * bucket_size;
 157
 158
 159         prt_printf(out, "Device:");
 160         prt_tab(out);
 161         prt_printf(out, "%u", i);
 162         prt_newline(out);
 163
 164         printbuf_indent_add(out, 2);
 165
 166         prt_printf(out, "UUID:");
 167         prt_tab(out);
 168         pr_uuid(out, m.uuid.b);
 169         prt_newline(out);
 170
 171         prt_printf(out, "Size:");
 172         prt_tab(out);
 173         prt_units_u64(out, device_size << 9);
 174         prt_newline(out);
 175
 176         for (unsigned i = 0; i < BCH_IOPS_NR; i++) {
 177                 prt_printf(out, "%s iops:", bch2_iops_measurements[i]);
 178                 prt_tab(out);
 179                 prt_printf(out, "%u", le32_to_cpu(m.iops[i]));
 180                 prt_newline(out);
 181         }
 182
 183         prt_printf(out, "Bucket size:");
 184         prt_tab(out);
 185         prt_units_u64(out, bucket_size << 9);
 186         prt_newline(out);
 187
 188         prt_printf(out, "First bucket:");
 189         prt_tab(out);
 190         prt_printf(out, "%u", le16_to_cpu(m.first_bucket));
 191         prt_newline(out);
 192
 193         prt_printf(out, "Buckets:");
 194         prt_tab(out);
 195         prt_printf(out, "%llu", le64_to_cpu(m.nbuckets));
 196         prt_newline(out);
 197
 198         prt_printf(out, "Last mount:");
 199         prt_tab(out);
 200         if (m.last_mount)
 201                 pr_time(out, le64_to_cpu(m.last_mount));
 202         else
 203                 prt_printf(out, "(never)");
 204         prt_newline(out);
 205
 206         prt_printf(out, "State:");
 207         prt_tab(out);
 208         prt_printf(out, "%s",
 209                    BCH_MEMBER_STATE(&m) < BCH_MEMBER_STATE_NR
 210                    ? bch2_member_states[BCH_MEMBER_STATE(&m)]
 211                    : "unknown");
 212         prt_newline(out);
 213
 214         prt_printf(out, "Label:");
 215         prt_tab(out);
 216         if (BCH_MEMBER_GROUP(&m)) {
 217                 unsigned idx = BCH_MEMBER_GROUP(&m) - 1;
 218
 219                 if (idx < disk_groups_nr(gi))
 220                         prt_printf(out, "%s (%u)",
 221                                    gi->entries[idx].label, idx);
 222                 else
 223                         prt_printf(out, "(bad disk labels section)");
 224         } else {
 225                 prt_printf(out, "(none)");
 226         }
 227         prt_newline(out);
 228
 229         prt_printf(out, "Data allowed:");
 230         prt_tab(out);
 231         if (BCH_MEMBER_DATA_ALLOWED(&m))
 232                 prt_bitflags(out, bch2_data_types, BCH_MEMBER_DATA_ALLOWED(&m));
 233         else
 234                 prt_printf(out, "(none)");
 235         prt_newline(out);
 236
 237         prt_printf(out, "Has data:");
 238         prt_tab(out);
 239         if (data_have)
 240                 prt_bitflags(out, bch2_data_types, data_have);
 241         else
 242                 prt_printf(out, "(none)");
 243         prt_newline(out);
 244
 245         prt_printf(out, "Discard:");
 246         prt_tab(out);
 247         prt_printf(out, "%llu", BCH_MEMBER_DISCARD(&m));
 248         prt_newline(out);
 249
 250         prt_printf(out, "Freespace initialized:");
 251         prt_tab(out);
 252         prt_printf(out, "%llu", BCH_MEMBER_FREESPACE_INITIALIZED(&m));
 253         prt_newline(out);
 254
 255         printbuf_indent_sub(out, 2);
 256 }
 257
 258 static int bch2_sb_members_v1_validate(struct bch_sb *sb,
 259                                     struct bch_sb_field *f,
 260                                     struct printbuf *err)
 261 {
 262         struct bch_sb_field_members_v1 *mi = field_to_type(f, members_v1);
 263         unsigned i;
 264
 265         if ((void *) members_v1_get_mut(mi, sb->nr_devices)  >
 266             vstruct_end(&mi->field)) {
 267                 prt_printf(err, "too many devices for section size");
 268                 return -BCH_ERR_invalid_sb_members;
 269         }
 270
 271         for (i = 0; i < sb->nr_devices; i++) {
 272                 struct bch_member m = members_v1_get(mi, i);
 273
 274                 int ret = validate_member(err, m, sb, i);
 275                 if (ret)
 276                         return ret;
 277         }
 278
 279         return 0;
 280 }
 281
 282 static void bch2_sb_members_v1_to_text(struct printbuf *out, struct bch_sb *sb,
 283                                        struct bch_sb_field *f)
 284 {
 285         struct bch_sb_field_members_v1 *mi = field_to_type(f, members_v1);
 286         struct bch_sb_field_disk_groups *gi = bch2_sb_field_get(sb, disk_groups);
 287         unsigned i;
 288
 289         for (i = 0; i < sb->nr_devices; i++) {
 290                 struct bch_member m = members_v1_get(mi, i);
 291                 member_to_text(out, m, gi, sb, i);
 292         }
 293 }
 294
 295 const struct bch_sb_field_ops bch_sb_field_ops_members_v1 = {
 296         .validate       = bch2_sb_members_v1_validate,
 297         .to_text        = bch2_sb_members_v1_to_text,
 298 };
 299
 300 static void bch2_sb_members_v2_to_text(struct printbuf *out, struct bch_sb *sb,
 301                                        struct bch_sb_field *f)
 302 {
 303         struct bch_sb_field_members_v2 *mi = field_to_type(f, members_v2);
 304         struct bch_sb_field_disk_groups *gi = bch2_sb_field_get(sb, disk_groups);
 305         unsigned i;
 306
 307         for (i = 0; i < sb->nr_devices; i++) {
 308                 struct bch_member m = members_v2_get(mi, i);
 309                 member_to_text(out, m, gi, sb, i);
 310         }
 311 }
 312
 313 static int bch2_sb_members_v2_validate(struct bch_sb *sb,
 314                                        struct bch_sb_field *f,
 315                                        struct printbuf *err)
 316 {
 317         struct bch_sb_field_members_v2 *mi = field_to_type(f, members_v2);
 318         size_t mi_bytes = (void *) members_v2_get_mut(mi, sb->nr_devices) -
 319                 (void *) mi;
 320
 321         if (mi_bytes > vstruct_bytes(&mi->field)) {
 322                 prt_printf(err, "section too small (%zu > %zu)",
 323                            mi_bytes, vstruct_bytes(&mi->field));
 324                 return -BCH_ERR_invalid_sb_members;
 325         }
 326
 327         for (unsigned i = 0; i < sb->nr_devices; i++) {
 328                 int ret = validate_member(err, members_v2_get(mi, i), sb, i);
 329                 if (ret)
 330                         return ret;
 331         }
 332
 333         return 0;
 334 }
 335
 336 const struct bch_sb_field_ops bch_sb_field_ops_members_v2 = {
 337         .validate       = bch2_sb_members_v2_validate,
 338         .to_text        = bch2_sb_members_v2_to_text,
 339 };