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[restorer] Mappings only get inserted when the device is completed.

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This saves looking up the device mapping tree for every insert.
This commit is contained in:
Joe Thornber 2013-05-02 12:59:42 +01:00
parent 5a231a7db0
commit edf16f59c7
1 changed files with 11 additions and 9 deletions
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20
thin-provisioning/restore_emitter.cc
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@ -77,15 +77,17 @@ namespace {
md_->details_->insert(key, details);
// Insert an empty mapping tree
single_mapping_tree::ptr new_tree(
new single_mapping_tree(md_->tm_,
block_time_ref_counter(md_->data_sm_)));
md_->mappings_top_level_->insert(key, new_tree->get_root());
md_->mappings_->set_root(md_->mappings_top_level_->get_root()); // FIXME: ugly
current_mapping_.reset(new single_mapping_tree(md_->tm_,
block_time_ref_counter(md_->data_sm_)));
current_device_ = optional<uint32_t>(dev);
}
virtual void end_device() {
uint64_t key[1] = {*current_device_};
md_->mappings_top_level_->insert(key, current_mapping_->get_root());
md_->mappings_->set_root(md_->mappings_top_level_->get_root()); // FIXME: ugly
current_device_ = optional<uint32_t>();
}
@ -110,17 +112,16 @@ namespace {
if (!current_device_)
throw runtime_error("not in device");
uint64_t key[2] = {*current_device_, origin_block};
uint64_t key[1] = {origin_block};
block_time bt;
bt.block_ = data_block;
bt.time_ = time;
md_->mappings_->insert(key, bt);
md_->mappings_top_level_->set_root(md_->mappings_->get_root());
current_mapping_->insert(key, bt);
md_->data_sm_->inc(data_block);
}
private:
bool device_exists(thin_dev_t dev) const {
bool device_exists(thin_dev_t dev) const {
uint64_t key[1] = {dev};
detail_tree::maybe_value v = md_->details_->lookup(key);
return v;
@ -129,6 +130,7 @@ namespace {
metadata::ptr md_;
bool in_superblock_;
optional<uint32_t> current_device_;
single_mapping_tree::ptr current_mapping_;
};
}