115 lines
2.5 KiB
C++
115 lines
2.5 KiB
C++
#include "caching/restore_emitter.h"
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#include "caching/superblock.h"
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#include "caching/mapping_array.h"
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using namespace caching;
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using namespace mapping_array_detail;
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using namespace std;
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using namespace superblock_detail;
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//----------------------------------------------------------------
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namespace {
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class restorer : public emitter {
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public:
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restorer(metadata::ptr md)
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: in_superblock_(false),
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md_(md) {
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}
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virtual ~restorer() {
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}
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virtual void begin_superblock(std::string const &uuid,
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pd::block_address block_size,
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pd::block_address nr_cache_blocks,
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std::string const &policy) {
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superblock &sb = md_->sb_;
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sb.flags = 0;
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memset(sb.uuid, 0, sizeof(sb.uuid));
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sb.magic = caching::superblock_detail::SUPERBLOCK_MAGIC;
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sb.version = 0; // FIXME: fix
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// strncpy(sb.policy_name, policy.c_str(), sizeof(sb.policy_name));
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memset(sb.policy_version, 0, sizeof(sb.policy_version));
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sb.policy_hint_size = 0; // FIXME: fix
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memset(sb.metadata_space_map_root, 0, sizeof(sb.metadata_space_map_root));
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sb.mapping_root = 0;
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sb.hint_root = 0;
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sb.discard_root = 0;
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sb.discard_block_size = 0;
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sb.discard_nr_blocks = 0;
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sb.data_block_size = block_size;
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sb.metadata_block_size = 0;
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sb.cache_blocks = nr_cache_blocks;
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sb.compat_flags = 0;
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sb.compat_ro_flags = 0;
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sb.incompat_flags = 0;
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sb.read_hits = 0;
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sb.read_misses = 0;
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sb.write_hits = 0;
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sb.write_misses = 0;
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struct mapping unmapped_value;
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unmapped_value.oblock_ = 0;
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unmapped_value.flags_ = 0;
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md_->mappings_->grow(nr_cache_blocks, unmapped_value);
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}
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virtual void end_superblock() {
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md_->commit();
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}
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virtual void begin_mappings() {
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// noop
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}
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virtual void end_mappings() {
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// noop
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}
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virtual void mapping(pd::block_address cblock,
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pd::block_address oblock,
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bool dirty) {
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mapping_array_detail::mapping m;
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m.oblock_ = oblock;
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m.flags_ = M_VALID;
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if (dirty)
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m.flags_ = m.flags_ | M_DIRTY;
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md_->mappings_->set(cblock, m);
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}
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virtual void begin_hints() {
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}
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virtual void end_hints() {
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}
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virtual void hint(pd::block_address cblock,
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std::string const &data) {
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}
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private:
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bool in_superblock_;
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metadata::ptr md_;
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};
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}
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//----------------------------------------------------------------
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emitter::ptr
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caching::create_restore_emitter(metadata::ptr md)
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{
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return emitter::ptr(new restorer(md));
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}
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//----------------------------------------------------------------
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