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[thin_pool] Determine shared blocks while looking up mappings

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This commit is contained in:
Ming-Hung Tsai 2020-06-02 01:03:01 +08:00
parent a842b4ecfd
commit 383ae78871
2 changed files with 14 additions and 2 deletions
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9
thin-provisioning/thin_pool.cc
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@ -60,7 +60,14 @@ thin::maybe_address
thin::lookup(block_address thin_block) thin::lookup(block_address thin_block)
{ {
uint64_t key[2] = {dev_, thin_block}; uint64_t key[2] = {dev_, thin_block};
return pool_.md_->mappings_->lookup(key); mapping_tree::maybe_value m = pool_.md_->mappings_->lookup(key);
if (!m)
return thin::maybe_address();
lookup_result r;
r.block_ = m->block_;
r.shared_ = m->time_ < details_.snapshotted_time_;
return r;
} }
bool bool

7
thin-provisioning/thin_pool.h
View File

@ -33,8 +33,13 @@ namespace thin_provisioning {
class thin_pool; class thin_pool;
class thin { class thin {
public: public:
struct lookup_result {
block_address block_;
bool shared_;
};
typedef std::shared_ptr<thin> ptr; typedef std::shared_ptr<thin> ptr;
typedef boost::optional<mapping_tree_detail::block_time> maybe_address; typedef boost::optional<lookup_result> maybe_address;
thin_dev_t get_dev_t() const; thin_dev_t get_dev_t() const;
maybe_address lookup(block_address thin_block); maybe_address lookup(block_address thin_block);