261 lines
7.3 KiB
C
261 lines
7.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Superblock section that contains a list of recovery passes to run when
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* downgrading past a given version
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*/
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#include "bcachefs.h"
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#include "darray.h"
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#include "recovery.h"
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#include "sb-downgrade.h"
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#include "sb-errors.h"
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#include "super-io.h"
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#define RECOVERY_PASS_ALL_FSCK BIT_ULL(63)
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/*
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* Upgrade, downgrade tables - run certain recovery passes, fix certain errors
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*
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* x(version, recovery_passes, errors...)
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*/
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#define UPGRADE_TABLE() \
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x(backpointers, \
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RECOVERY_PASS_ALL_FSCK) \
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x(inode_v3, \
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RECOVERY_PASS_ALL_FSCK) \
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x(unwritten_extents, \
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RECOVERY_PASS_ALL_FSCK) \
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x(bucket_gens, \
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BIT_ULL(BCH_RECOVERY_PASS_bucket_gens_init)| \
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RECOVERY_PASS_ALL_FSCK) \
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x(lru_v2, \
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RECOVERY_PASS_ALL_FSCK) \
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x(fragmentation_lru, \
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RECOVERY_PASS_ALL_FSCK) \
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x(no_bps_in_alloc_keys, \
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RECOVERY_PASS_ALL_FSCK) \
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x(snapshot_trees, \
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RECOVERY_PASS_ALL_FSCK) \
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x(snapshot_skiplists, \
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BIT_ULL(BCH_RECOVERY_PASS_check_snapshots), \
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BCH_FSCK_ERR_snapshot_bad_depth, \
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BCH_FSCK_ERR_snapshot_bad_skiplist) \
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x(deleted_inodes, \
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BIT_ULL(BCH_RECOVERY_PASS_check_inodes), \
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BCH_FSCK_ERR_unlinked_inode_not_on_deleted_list) \
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x(rebalance_work, \
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BIT_ULL(BCH_RECOVERY_PASS_set_fs_needs_rebalance))
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#define DOWNGRADE_TABLE()
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struct upgrade_downgrade_entry {
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u64 recovery_passes;
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u16 version;
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u16 nr_errors;
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const u16 *errors;
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};
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#define x(ver, passes, ...) static const u16 upgrade_##ver##_errors[] = { __VA_ARGS__ };
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UPGRADE_TABLE()
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#undef x
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static const struct upgrade_downgrade_entry upgrade_table[] = {
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#define x(ver, passes, ...) { \
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.recovery_passes = passes, \
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.version = bcachefs_metadata_version_##ver,\
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.nr_errors = ARRAY_SIZE(upgrade_##ver##_errors), \
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.errors = upgrade_##ver##_errors, \
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},
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UPGRADE_TABLE()
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#undef x
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};
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void bch2_sb_set_upgrade(struct bch_fs *c,
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unsigned old_version,
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unsigned new_version)
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{
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lockdep_assert_held(&c->sb_lock);
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struct bch_sb_field_ext *ext = bch2_sb_field_get(c->disk_sb.sb, ext);
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for (const struct upgrade_downgrade_entry *i = upgrade_table;
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i < upgrade_table + ARRAY_SIZE(upgrade_table);
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i++)
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if (i->version > old_version && i->version <= new_version) {
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u64 passes = i->recovery_passes;
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if (passes & RECOVERY_PASS_ALL_FSCK)
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passes |= bch2_fsck_recovery_passes();
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passes &= ~RECOVERY_PASS_ALL_FSCK;
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ext->recovery_passes_required[0] |=
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cpu_to_le64(bch2_recovery_passes_to_stable(passes));
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for (const u16 *e = i->errors;
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e < i->errors + i->nr_errors;
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e++) {
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__set_bit(*e, c->sb.errors_silent);
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ext->errors_silent[*e / 64] |= cpu_to_le64(BIT_ULL(*e % 64));
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}
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}
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}
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#define x(ver, passes, ...) static const u16 downgrade_ver_##errors[] = { __VA_ARGS__ };
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DOWNGRADE_TABLE()
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#undef x
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static const struct upgrade_downgrade_entry downgrade_table[] = {
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#define x(ver, passes, ...) { \
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.recovery_passes = passes, \
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.version = bcachefs_metadata_version_##ver,\
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.nr_errors = ARRAY_SIZE(downgrade_##ver##_errors), \
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.errors = downgrade_##ver##_errors, \
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},
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DOWNGRADE_TABLE()
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#undef x
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};
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static inline const struct bch_sb_field_downgrade_entry *
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downgrade_entry_next_c(const struct bch_sb_field_downgrade_entry *e)
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{
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return (void *) &e->errors[le16_to_cpu(e->nr_errors)];
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}
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#define for_each_downgrade_entry(_d, _i) \
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for (const struct bch_sb_field_downgrade_entry *_i = (_d)->entries; \
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(void *) _i < vstruct_end(&(_d)->field) && \
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(void *) &_i->errors[0] < vstruct_end(&(_d)->field); \
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_i = downgrade_entry_next_c(_i))
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static int bch2_sb_downgrade_validate(struct bch_sb *sb, struct bch_sb_field *f,
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struct printbuf *err)
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{
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struct bch_sb_field_downgrade *e = field_to_type(f, downgrade);
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for_each_downgrade_entry(e, i) {
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if (BCH_VERSION_MAJOR(le16_to_cpu(i->version)) !=
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BCH_VERSION_MAJOR(le16_to_cpu(sb->version))) {
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prt_printf(err, "downgrade entry with mismatched major version (%u != %u)",
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BCH_VERSION_MAJOR(le16_to_cpu(i->version)),
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BCH_VERSION_MAJOR(le16_to_cpu(sb->version)));
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return -BCH_ERR_invalid_sb_downgrade;
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}
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}
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return 0;
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}
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static void bch2_sb_downgrade_to_text(struct printbuf *out, struct bch_sb *sb,
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struct bch_sb_field *f)
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{
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struct bch_sb_field_downgrade *e = field_to_type(f, downgrade);
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if (out->nr_tabstops <= 1)
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printbuf_tabstop_push(out, 16);
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for_each_downgrade_entry(e, i) {
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prt_str(out, "version:");
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prt_tab(out);
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bch2_version_to_text(out, le16_to_cpu(i->version));
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prt_newline(out);
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prt_str(out, "recovery passes:");
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prt_tab(out);
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prt_bitflags(out, bch2_recovery_passes,
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bch2_recovery_passes_from_stable(le64_to_cpu(i->recovery_passes[0])));
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prt_newline(out);
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prt_str(out, "errors:");
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prt_tab(out);
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bool first = true;
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for (unsigned j = 0; j < le16_to_cpu(i->nr_errors); j++) {
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if (!first)
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prt_char(out, ',');
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first = false;
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unsigned e = le16_to_cpu(i->errors[j]);
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prt_str(out, e < BCH_SB_ERR_MAX ? bch2_sb_error_strs[e] : "(unknown)");
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}
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prt_newline(out);
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}
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}
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const struct bch_sb_field_ops bch_sb_field_ops_downgrade = {
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.validate = bch2_sb_downgrade_validate,
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.to_text = bch2_sb_downgrade_to_text,
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};
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int bch2_sb_downgrade_update(struct bch_fs *c)
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{
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darray_char table = {};
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int ret = 0;
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for (const struct upgrade_downgrade_entry *src = downgrade_table;
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src < downgrade_table + ARRAY_SIZE(downgrade_table);
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src++) {
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if (BCH_VERSION_MAJOR(src->version) != BCH_VERSION_MAJOR(le16_to_cpu(c->disk_sb.sb->version)))
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continue;
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struct bch_sb_field_downgrade_entry *dst;
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unsigned bytes = sizeof(*dst) + sizeof(dst->errors[0]) * src->nr_errors;
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ret = darray_make_room(&table, bytes);
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if (ret)
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goto out;
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dst = (void *) &darray_top(table);
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dst->version = cpu_to_le16(src->version);
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dst->recovery_passes[0] = cpu_to_le64(src->recovery_passes);
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dst->recovery_passes[1] = 0;
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dst->nr_errors = cpu_to_le16(src->nr_errors);
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for (unsigned i = 0; i < src->nr_errors; i++)
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dst->errors[i] = cpu_to_le16(src->errors[i]);
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table.nr += bytes;
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}
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struct bch_sb_field_downgrade *d = bch2_sb_field_get(c->disk_sb.sb, downgrade);
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unsigned sb_u64s = DIV_ROUND_UP(sizeof(*d) + table.nr, sizeof(u64));
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if (d && le32_to_cpu(d->field.u64s) > sb_u64s)
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goto out;
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d = bch2_sb_field_resize(&c->disk_sb, downgrade, sb_u64s);
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if (!d) {
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ret = -BCH_ERR_ENOSPC_sb_downgrade;
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goto out;
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}
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memcpy(d->entries, table.data, table.nr);
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memset_u64s_tail(d->entries, 0, table.nr);
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out:
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darray_exit(&table);
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return ret;
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}
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void bch2_sb_set_downgrade(struct bch_fs *c, unsigned new_minor, unsigned old_minor)
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{
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struct bch_sb_field_downgrade *d = bch2_sb_field_get(c->disk_sb.sb, downgrade);
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if (!d)
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return;
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struct bch_sb_field_ext *ext = bch2_sb_field_get(c->disk_sb.sb, ext);
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for_each_downgrade_entry(d, i) {
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unsigned minor = BCH_VERSION_MINOR(le16_to_cpu(i->version));
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if (new_minor < minor && minor <= old_minor) {
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ext->recovery_passes_required[0] |= i->recovery_passes[0];
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ext->recovery_passes_required[1] |= i->recovery_passes[1];
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for (unsigned j = 0; j < le16_to_cpu(i->nr_errors); j++) {
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unsigned e = le16_to_cpu(i->errors[j]);
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if (e < BCH_SB_ERR_MAX)
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__set_bit(e, c->sb.errors_silent);
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if (e < sizeof(ext->errors_silent) * 8)
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ext->errors_silent[e / 64] |= cpu_to_le64(BIT_ULL(e % 64));
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}
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}
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}
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}
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