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 50 #define DOWNGRADE_TABLE() 51 52 struct upgrade_downgrade_entry { 53 u64 recovery_passes; 54 u16 version; 55 u16 nr_errors; 56 const u16 *errors; 57 }; 58 59 #define x(ver, passes, ...) static const u16 upgrade_##ver##_errors[] = { __VA_ARGS__ }; 60 UPGRADE_TABLE() 61 #undef x 62 63 static const struct upgrade_downgrade_entry upgrade_table[] = { 64 #define x(ver, passes, ...) { \ 65 .recovery_passes = passes, \ 66 .version = bcachefs_metadata_version_##ver,\ 67 .nr_errors = ARRAY_SIZE(upgrade_##ver##_errors), \ 68 .errors = upgrade_##ver##_errors, \ 69 }, 70 UPGRADE_TABLE() 71 #undef x 72 }; 73 74 void bch2_sb_set_upgrade(struct bch_fs *c, 75 unsigned old_version, 76 unsigned new_version) 77 { 78 lockdep_assert_held(&c->sb_lock); 79 80 struct bch_sb_field_ext *ext = bch2_sb_field_get(c->disk_sb.sb, ext); 81 82 for (const struct upgrade_downgrade_entry *i = upgrade_table; 83 i < upgrade_table + ARRAY_SIZE(upgrade_table); 84 i++) 85 if (i->version > old_version && i->version <= new_version) { 86 u64 passes = i->recovery_passes; 87 88 if (passes & RECOVERY_PASS_ALL_FSCK) 89 passes |= bch2_fsck_recovery_passes(); 90 passes &= ~RECOVERY_PASS_ALL_FSCK; 91 92 ext->recovery_passes_required[0] |= 93 cpu_to_le64(bch2_recovery_passes_to_stable(passes)); 94 95 for (const u16 *e = i->errors; 96 e < i->errors + i->nr_errors; 97 e++) { 98 __set_bit(*e, c->sb.errors_silent); 99 ext->errors_silent[*e / 64] |= cpu_to_le64(BIT_ULL(*e % 64)); 100 } 101 } 102 } 103 104 #define x(ver, passes, ...) static const u16 downgrade_ver_##errors[] = { __VA_ARGS__ }; 105 DOWNGRADE_TABLE() 106 #undef x 107 108 static const struct upgrade_downgrade_entry downgrade_table[] = { 109 #define x(ver, passes, ...) { \ 110 .recovery_passes = passes, \ 111 .version = bcachefs_metadata_version_##ver,\ 112 .nr_errors = ARRAY_SIZE(downgrade_##ver##_errors), \ 113 .errors = downgrade_##ver##_errors, \ 114 }, 115 DOWNGRADE_TABLE() 116 #undef x 117 }; 118 119 static inline const struct bch_sb_field_downgrade_entry * 120 downgrade_entry_next_c(const struct bch_sb_field_downgrade_entry *e) 121 { 122 return (void *) &e->errors[le16_to_cpu(e->nr_errors)]; 123 } 124 125 #define for_each_downgrade_entry(_d, _i) \ 126 for (const struct bch_sb_field_downgrade_entry *_i = (_d)->entries; \ 127 (void *) _i < vstruct_end(&(_d)->field) && \ 128 (void *) &_i->errors[0] < vstruct_end(&(_d)->field); \ 129 _i = downgrade_entry_next_c(_i)) 130 131 static int bch2_sb_downgrade_validate(struct bch_sb *sb, struct bch_sb_field *f, 132 struct printbuf *err) 133 { 134 struct bch_sb_field_downgrade *e = field_to_type(f, downgrade); 135 136 for_each_downgrade_entry(e, i) { 137 if (BCH_VERSION_MAJOR(le16_to_cpu(i->version)) != 138 BCH_VERSION_MAJOR(le16_to_cpu(sb->version))) { 139 prt_printf(err, "downgrade entry with mismatched major version (%u != %u)", 140 BCH_VERSION_MAJOR(le16_to_cpu(i->version)), 141 BCH_VERSION_MAJOR(le16_to_cpu(sb->version))); 142 return -BCH_ERR_invalid_sb_downgrade; 143 } 144 } 145 146 return 0; 147 } 148 149 static void bch2_sb_downgrade_to_text(struct printbuf *out, struct bch_sb *sb, 150 struct bch_sb_field *f) 151 { 152 struct bch_sb_field_downgrade *e = field_to_type(f, downgrade); 153 154 if (out->nr_tabstops <= 1) 155 printbuf_tabstop_push(out, 16); 156 157 for_each_downgrade_entry(e, i) { 158 prt_str(out, "version:"); 159 prt_tab(out); 160 bch2_version_to_text(out, le16_to_cpu(i->version)); 161 prt_newline(out); 162 163 prt_str(out, "recovery passes:"); 164 prt_tab(out); 165 prt_bitflags(out, bch2_recovery_passes, 166 bch2_recovery_passes_from_stable(le64_to_cpu(i->recovery_passes[0]))); 167 prt_newline(out); 168 169 prt_str(out, "errors:"); 170 prt_tab(out); 171 bool first = true; 172 for (unsigned j = 0; j < le16_to_cpu(i->nr_errors); j++) { 173 if (!first) 174 prt_char(out, ','); 175 first = false; 176 unsigned e = le16_to_cpu(i->errors[j]); 177 prt_str(out, e < BCH_SB_ERR_MAX ? bch2_sb_error_strs[e] : "(unknown)"); 178 } 179 prt_newline(out); 180 } 181 } 182 183 const struct bch_sb_field_ops bch_sb_field_ops_downgrade = { 184 .validate = bch2_sb_downgrade_validate, 185 .to_text = bch2_sb_downgrade_to_text, 186 }; 187 188 int bch2_sb_downgrade_update(struct bch_fs *c) 189 { 190 darray_char table = {}; 191 int ret = 0; 192 193 for (const struct upgrade_downgrade_entry *src = downgrade_table; 194 src < downgrade_table + ARRAY_SIZE(downgrade_table); 195 src++) { 196 if (BCH_VERSION_MAJOR(src->version) != BCH_VERSION_MAJOR(le16_to_cpu(c->disk_sb.sb->version))) 197 continue; 198 199 struct bch_sb_field_downgrade_entry *dst; 200 unsigned bytes = sizeof(*dst) + sizeof(dst->errors[0]) * src->nr_errors; 201 202 ret = darray_make_room(&table, bytes); 203 if (ret) 204 goto out; 205 206 dst = (void *) &darray_top(table); 207 dst->version = cpu_to_le16(src->version); 208 dst->recovery_passes[0] = cpu_to_le64(src->recovery_passes); 209 dst->recovery_passes[1] = 0; 210 dst->nr_errors = cpu_to_le16(src->nr_errors); 211 for (unsigned i = 0; i < src->nr_errors; i++) 212 dst->errors[i] = cpu_to_le16(src->errors[i]); 213 214 table.nr += bytes; 215 } 216 217 struct bch_sb_field_downgrade *d = bch2_sb_field_get(c->disk_sb.sb, downgrade); 218 219 unsigned sb_u64s = DIV_ROUND_UP(sizeof(*d) + table.nr, sizeof(u64)); 220 221 if (d && le32_to_cpu(d->field.u64s) > sb_u64s) 222 goto out; 223 224 d = bch2_sb_field_resize(&c->disk_sb, downgrade, sb_u64s); 225 if (!d) { 226 ret = -BCH_ERR_ENOSPC_sb_downgrade; 227 goto out; 228 } 229 230 memcpy(d->entries, table.data, table.nr); 231 memset_u64s_tail(d->entries, 0, table.nr); 232 out: 233 darray_exit(&table); 234 return ret; 235 } 236 237 void bch2_sb_set_downgrade(struct bch_fs *c, unsigned new_minor, unsigned old_minor) 238 { 239 struct bch_sb_field_downgrade *d = bch2_sb_field_get(c->disk_sb.sb, downgrade); 240 if (!d) 241 return; 242 243 struct bch_sb_field_ext *ext = bch2_sb_field_get(c->disk_sb.sb, ext); 244 245 for_each_downgrade_entry(d, i) { 246 unsigned minor = BCH_VERSION_MINOR(le16_to_cpu(i->version)); 247 if (new_minor < minor && minor <= old_minor) { 248 ext->recovery_passes_required[0] |= i->recovery_passes[0]; 249 ext->recovery_passes_required[1] |= i->recovery_passes[1]; 250 251 for (unsigned j = 0; j < le16_to_cpu(i->nr_errors); j++) { 252 unsigned e = le16_to_cpu(i->errors[j]); 253 if (e < BCH_SB_ERR_MAX) 254 __set_bit(e, c->sb.errors_silent); 255 if (e < sizeof(ext->errors_silent) * 8) 256 ext->errors_silent[e / 64] |= cpu_to_le64(BIT_ULL(e % 64)); 257 } 258 } 259 } 260 } 261