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WIP on cache tools

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This commit is contained in:
Joe Thornber
2013-09-11 11:40:46 +01:00
parent d3ce6b811b
commit 6615b25e4b
19 changed files with 560 additions and 54 deletions
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17
thin-provisioning/metadata.cc
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@@ -17,9 +17,9 @@
// <http://www.gnu.org/licenses/>.
#include "thin-provisioning/device_tree.h"
#include "thin-provisioning/file_utils.h"
#include "thin-provisioning/metadata.h"
#include "persistent-data/file_utils.h"
#include "persistent-data/math_utils.h"
#include "persistent-data/space-maps/core.h"
#include "persistent-data/space-maps/disk.h"
@@ -40,15 +40,6 @@ namespace {
unsigned const METADATA_CACHE_SIZE = 1024;
block_manager<>::ptr open_bm(string const &dev_path, bool writeable) {
block_address nr_blocks = get_nr_blocks(dev_path);
block_io<>::mode m = writeable ?
block_io<>::READ_WRITE :
block_io<>::READ_ONLY;
return block_manager<>::ptr(new block_manager<>(dev_path, nr_blocks, 1, m));
}
transaction_manager::ptr
open_tm(block_manager<>::ptr bm) {
space_map::ptr sm(new core_map(bm->get_nr_blocks()));
@@ -90,7 +81,7 @@ metadata::metadata(std::string const &dev_path, open_type ot,
{
switch (ot) {
case OPEN:
tm_ = open_tm(open_bm(dev_path, false));
tm_ = open_tm(open_bm(dev_path, block_io<>::READ_ONLY));
sb_ = read_superblock(tm_->get_bm());
if (sb_.version_ != 1)
@@ -115,7 +106,7 @@ metadata::metadata(std::string const &dev_path, open_type ot,
break;
case CREATE:
tm_ = open_tm(open_bm(dev_path, true));
tm_ = open_tm(open_bm(dev_path, block_io<>::READ_WRITE));
space_map::ptr core = tm_->get_sm();
metadata_sm_ = create_metadata_sm(tm_, tm_->get_bm()->get_nr_blocks());
copy_space_maps(metadata_sm_, core);
@@ -143,7 +134,7 @@ metadata::metadata(std::string const &dev_path, open_type ot,
metadata::metadata(std::string const &dev_path, block_address metadata_snap)
{
tm_ = open_tm(open_bm(dev_path, false));
tm_ = open_tm(open_bm(dev_path, block_io<>::READ_ONLY));
sb_ = read_superblock(tm_->get_bm(), metadata_snap);
// We don't open the metadata sm for a held root