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[metadata_checker] Support in-place metadata space map modification

This commit is contained in:
Ming-Hung Tsai 2020-08-12 11:37:39 +08:00
parent 0349e9c9e2
commit 6c90f9483e
3 changed files with 25 additions and 3 deletions
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6
persistent-data/transaction_manager.h
View File

@ -69,6 +69,12 @@ namespace persistent_data {
bm_->prefetch(b);
}
// mark a block as shadowed,
// for the purpose of in-place modification
void mark_shadowed(block_address b) {
add_shadow(b);
}
private:
void add_shadow(block_address b);
void remove_shadow(block_address b);

21
thin-provisioning/metadata_checker.cc
View File

@ -274,6 +274,17 @@ namespace {
return err;
}
void mark_sm_shadowed(transaction_manager::ptr tm, persistent_space_map::ptr sm) {
block_counter bc(true);
sm->count_metadata(bc);
block_address nr_blocks = sm->get_nr_blocks();
for (block_address b = 0; b < nr_blocks; b++) {
if (bc.get_count(b))
tm->mark_shadowed(b);
}
}
error_state clear_leaked_blocks(space_map::ptr actual,
block_counter const &expected) {
error_state err = NO_ERROR;
@ -410,7 +421,7 @@ namespace {
optional<space_map::ptr>());
}
bool fix_metadata_leaks() {
bool fix_metadata_leaks(bool open_transaction) {
if (!verify_preconditions_before_fixing()) {
out_ << "metadata has not been fully examined" << end_message();
return false;
@ -429,6 +440,9 @@ namespace {
open_metadata_sm(*tm, static_cast<void const*>(&sb.metadata_space_map_root_));
tm->set_sm(metadata_sm);
if (!open_transaction)
mark_sm_shadowed(tm, metadata_sm);
err_ = clear_leaked_blocks(metadata_sm, expected_rc_);
if (err_ != NO_ERROR)
@ -562,7 +576,8 @@ check_options::check_options()
sm_opts_(SPACE_MAP_FULL),
ignore_non_fatal_(false),
fix_metadata_leaks_(false),
clear_needs_check_(false) {
clear_needs_check_(false),
open_transaction_(false) {
}
void check_options::set_superblock_only() {
@ -634,7 +649,7 @@ thin_provisioning::check_metadata(std::string const &path,
checker.check();
if (check_opts.fix_metadata_leaks_)
checker.fix_metadata_leaks();
checker.fix_metadata_leaks(check_opts.open_transaction_);
if (check_opts.fix_metadata_leaks_ ||
check_opts.clear_needs_check_)
checker.clear_needs_check_flag();

1
thin-provisioning/metadata_checker.h
View File

@ -55,6 +55,7 @@ namespace thin_provisioning {
bool ignore_non_fatal_;
bool fix_metadata_leaks_;
bool clear_needs_check_;
bool open_transaction_;
};
enum output_options {