1 // SPDX-License-Identifier: GPL-2.0 2 3 /* 4 * Superblock section that contains a list of recovery passes to run when 5 * downgrading past a given version 6 */ 7 8 #include "bcachefs.h" 9 #include "darray.h" 10 #include "recovery.h" 11 #include "sb-downgrade.h" 12 #include "sb-errors.h" 13 #include "super-io.h" 14 15 #define RECOVERY_PASS_ALL_FSCK BIT_ULL(63) 16 17 /* 18 * Upgrade, downgrade tables - run certain recovery passes, fix certain errors 19 * 20 * x(version, recovery_passes, errors...) 21 */ 22 #define UPGRADE_TABLE() \ 23 x(backpointers, \ 24 RECOVERY_PASS_ALL_FSCK) \ 25 x(inode_v3, \ 26 RECOVERY_PASS_ALL_FSCK) \ 27 x(unwritten_extents, \ 28 RECOVERY_PASS_ALL_FSCK) \ 29 x(bucket_gens, \ 30 BIT_ULL(BCH_RECOVERY_PASS_bucket_gens_init)| \ 31 RECOVERY_PASS_ALL_FSCK) \ 32 x(lru_v2, \ 33 RECOVERY_PASS_ALL_FSCK) \ 34 x(fragmentation_lru, \ 35 RECOVERY_PASS_ALL_FSCK) \ 36 x(no_bps_in_alloc_keys, \ 37 RECOVERY_PASS_ALL_FSCK) \ 38 x(snapshot_trees, \ 39 RECOVERY_PASS_ALL_FSCK) \ 40 x(snapshot_skiplists, \ 41 BIT_ULL(BCH_RECOVERY_PASS_check_snapshots), \ 42 BCH_FSCK_ERR_snapshot_bad_depth, \ 43 BCH_FSCK_ERR_snapshot_bad_skiplist) \ 44 x(deleted_inodes, \ 45 BIT_ULL(BCH_RECOVERY_PASS_check_inodes), \ 46 BCH_FSCK_ERR_unlinked_inode_not_on_deleted_list) \ 47 x(rebalance_work, \ 48 BIT_ULL(BCH_RECOVERY_PASS_set_fs_needs_rebalance)) \ 49 x(subvolume_fs_parent, \ 50 BIT_ULL(BCH_RECOVERY_PASS_check_dirents), \ 51 BCH_FSCK_ERR_subvol_fs_path_parent_wrong) \ 52 x(btree_subvolume_children, \ 53 BIT_ULL(BCH_RECOVERY_PASS_check_subvols), \ 54 BCH_FSCK_ERR_subvol_children_not_set) 55 56 #define DOWNGRADE_TABLE() 57 58 struct upgrade_downgrade_entry { 59 u64 recovery_passes; 60 u16 version; 61 u16 nr_errors; 62 const u16 *errors; 63 }; 64 65 #define x(ver, passes, ...) static const u16 upgrade_##ver##_errors[] = { __VA_ARGS__ }; 66 UPGRADE_TABLE() 67 #undef x 68 69 static const struct upgrade_downgrade_entry upgrade_table[] = { 70 #define x(ver, passes, ...) { \ 71 .recovery_passes = passes, \ 72 .version = bcachefs_metadata_version_##ver,\ 73 .nr_errors = ARRAY_SIZE(upgrade_##ver##_errors), \ 74 .errors = upgrade_##ver##_errors, \ 75 }, 76 UPGRADE_TABLE() 77 #undef x 78 }; 79 80 void bch2_sb_set_upgrade(struct bch_fs *c, 81 unsigned old_version, 82 unsigned new_version) 83 { 84 lockdep_assert_held(&c->sb_lock); 85 86 struct bch_sb_field_ext *ext = bch2_sb_field_get(c->disk_sb.sb, ext); 87 88 for (const struct upgrade_downgrade_entry *i = upgrade_table; 89 i < upgrade_table + ARRAY_SIZE(upgrade_table); 90 i++) 91 if (i->version > old_version && i->version <= new_version) { 92 u64 passes = i->recovery_passes; 93 94 if (passes & RECOVERY_PASS_ALL_FSCK) 95 passes |= bch2_fsck_recovery_passes(); 96 passes &= ~RECOVERY_PASS_ALL_FSCK; 97 98 ext->recovery_passes_required[0] |= 99 cpu_to_le64(bch2_recovery_passes_to_stable(passes)); 100 101 for (const u16 *e = i->errors; 102 e < i->errors + i->nr_errors; 103 e++) { 104 __set_bit(*e, c->sb.errors_silent); 105 ext->errors_silent[*e / 64] |= cpu_to_le64(BIT_ULL(*e % 64)); 106 } 107 } 108 } 109 110 #define x(ver, passes, ...) static const u16 downgrade_ver_##errors[] = { __VA_ARGS__ }; 111 DOWNGRADE_TABLE() 112 #undef x 113 114 static const struct upgrade_downgrade_entry downgrade_table[] = { 115 #define x(ver, passes, ...) { \ 116 .recovery_passes = passes, \ 117 .version = bcachefs_metadata_version_##ver,\ 118 .nr_errors = ARRAY_SIZE(downgrade_##ver##_errors), \ 119 .errors = downgrade_##ver##_errors, \ 120 }, 121 DOWNGRADE_TABLE() 122 #undef x 123 }; 124 125 static inline const struct bch_sb_field_downgrade_entry * 126 downgrade_entry_next_c(const struct bch_sb_field_downgrade_entry *e) 127 { 128 return (void *) &e->errors[le16_to_cpu(e->nr_errors)]; 129 } 130 131 #define for_each_downgrade_entry(_d, _i) \ 132 for (const struct bch_sb_field_downgrade_entry *_i = (_d)->entries; \ 133 (void *) _i < vstruct_end(&(_d)->field) && \ 134 (void *) &_i->errors[0] < vstruct_end(&(_d)->field); \ 135 _i = downgrade_entry_next_c(_i)) 136 137 static int bch2_sb_downgrade_validate(struct bch_sb *sb, struct bch_sb_field *f, 138 struct printbuf *err) 139 { 140 struct bch_sb_field_downgrade *e = field_to_type(f, downgrade); 141 142 for_each_downgrade_entry(e, i) { 143 if (BCH_VERSION_MAJOR(le16_to_cpu(i->version)) != 144 BCH_VERSION_MAJOR(le16_to_cpu(sb->version))) { 145 prt_printf(err, "downgrade entry with mismatched major version (%u != %u)", 146 BCH_VERSION_MAJOR(le16_to_cpu(i->version)), 147 BCH_VERSION_MAJOR(le16_to_cpu(sb->version))); 148 return -BCH_ERR_invalid_sb_downgrade; 149 } 150 } 151 152 return 0; 153 } 154 155 static void bch2_sb_downgrade_to_text(struct printbuf *out, struct bch_sb *sb, 156 struct bch_sb_field *f) 157 { 158 struct bch_sb_field_downgrade *e = field_to_type(f, downgrade); 159 160 if (out->nr_tabstops <= 1) 161 printbuf_tabstop_push(out, 16); 162 163 for_each_downgrade_entry(e, i) { 164 prt_str(out, "version:"); 165 prt_tab(out); 166 bch2_version_to_text(out, le16_to_cpu(i->version)); 167 prt_newline(out); 168 169 prt_str(out, "recovery passes:"); 170 prt_tab(out); 171 prt_bitflags(out, bch2_recovery_passes, 172 bch2_recovery_passes_from_stable(le64_to_cpu(i->recovery_passes[0]))); 173 prt_newline(out); 174 175 prt_str(out, "errors:"); 176 prt_tab(out); 177 bool first = true; 178 for (unsigned j = 0; j < le16_to_cpu(i->nr_errors); j++) { 179 if (!first) 180 prt_char(out, ','); 181 first = false; 182 unsigned e = le16_to_cpu(i->errors[j]); 183 prt_str(out, e < BCH_SB_ERR_MAX ? bch2_sb_error_strs[e] : "(unknown)"); 184 } 185 prt_newline(out); 186 } 187 } 188 189 const struct bch_sb_field_ops bch_sb_field_ops_downgrade = { 190 .validate = bch2_sb_downgrade_validate, 191 .to_text = bch2_sb_downgrade_to_text, 192 }; 193 194 int bch2_sb_downgrade_update(struct bch_fs *c) 195 { 196 darray_char table = {}; 197 int ret = 0; 198 199 for (const struct upgrade_downgrade_entry *src = downgrade_table; 200 src < downgrade_table + ARRAY_SIZE(downgrade_table); 201 src++) { 202 if (BCH_VERSION_MAJOR(src->version) != BCH_VERSION_MAJOR(le16_to_cpu(c->disk_sb.sb->version))) 203 continue; 204 205 struct bch_sb_field_downgrade_entry *dst; 206 unsigned bytes = sizeof(*dst) + sizeof(dst->errors[0]) * src->nr_errors; 207 208 ret = darray_make_room(&table, bytes); 209 if (ret) 210 goto out; 211 212 dst = (void *) &darray_top(table); 213 dst->version = cpu_to_le16(src->version); 214 dst->recovery_passes[0] = cpu_to_le64(src->recovery_passes); 215 dst->recovery_passes[1] = 0; 216 dst->nr_errors = cpu_to_le16(src->nr_errors); 217 for (unsigned i = 0; i < src->nr_errors; i++) 218 dst->errors[i] = cpu_to_le16(src->errors[i]); 219 220 table.nr += bytes; 221 } 222 223 struct bch_sb_field_downgrade *d = bch2_sb_field_get(c->disk_sb.sb, downgrade); 224 225 unsigned sb_u64s = DIV_ROUND_UP(sizeof(*d) + table.nr, sizeof(u64)); 226 227 if (d && le32_to_cpu(d->field.u64s) > sb_u64s) 228 goto out; 229 230 d = bch2_sb_field_resize(&c->disk_sb, downgrade, sb_u64s); 231 if (!d) { 232 ret = -BCH_ERR_ENOSPC_sb_downgrade; 233 goto out; 234 } 235 236 memcpy(d->entries, table.data, table.nr); 237 memset_u64s_tail(d->entries, 0, table.nr); 238 out: 239 darray_exit(&table); 240 return ret; 241 } 242 243 void bch2_sb_set_downgrade(struct bch_fs *c, unsigned new_minor, unsigned old_minor) 244 { 245 struct bch_sb_field_downgrade *d = bch2_sb_field_get(c->disk_sb.sb, downgrade); 246 if (!d) 247 return; 248 249 struct bch_sb_field_ext *ext = bch2_sb_field_get(c->disk_sb.sb, ext); 250 251 for_each_downgrade_entry(d, i) { 252 unsigned minor = BCH_VERSION_MINOR(le16_to_cpu(i->version)); 253 if (new_minor < minor && minor <= old_minor) { 254 ext->recovery_passes_required[0] |= i->recovery_passes[0]; 255 ext->recovery_passes_required[1] |= i->recovery_passes[1]; 256 257 for (unsigned j = 0; j < le16_to_cpu(i->nr_errors); j++) { 258 unsigned e = le16_to_cpu(i->errors[j]); 259 if (e < BCH_SB_ERR_MAX) 260 __set_bit(e, c->sb.errors_silent); 261 if (e < sizeof(ext->errors_silent) * 8) 262 __set_bit_le64(e, ext->errors_silent); 263 } 264 } 265 } 266 } 267