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[block_manager] Hard code block size to 4k.

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We're never going to use anything other than 4k, and by hard coding it we
avoid making block_manager a template.
This commit is contained in:
Joe Thornber
2020-04-30 14:30:01 +01:00
parent 3e5de399a7
commit e801cc607b
57 changed files with 390 additions and 448 deletions
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18
persistent-data/file_utils.cc
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@ -19,8 +19,8 @@ using namespace std;
//----------------------------------------------------------------
bool
persistent_data::check_for_xml(block_manager<>::ptr bm) {
block_manager<>::read_ref b = bm->read_lock(0);
persistent_data::check_for_xml(block_manager::ptr bm) {
block_manager::read_ref b = bm->read_lock(0);
const char *data = reinterpret_cast<const char *>(b.data());
return (!strncmp(data, "<superblock", 11) || !strncmp(data, "<?xml", 5)
|| !strncmp(data, "<!DOCTYPE", 9));
@ -39,22 +39,22 @@ persistent_data::get_nr_metadata_blocks(std::string const &path)
return get_nr_blocks(path, MD_BLOCK_SIZE);
}
persistent_data::block_manager<>::ptr
persistent_data::open_bm(std::string const &dev_path, block_manager<>::mode m, bool excl)
persistent_data::block_manager::ptr
persistent_data::open_bm(std::string const &dev_path, block_manager::mode m, bool excl)
{
block_address nr_blocks = get_nr_metadata_blocks(dev_path);
return block_manager<>::ptr(new block_manager<>(dev_path, nr_blocks, 1, m, excl));
return block_manager::ptr(new block_manager(dev_path, nr_blocks, 1, m, excl));
}
block_manager<>::ptr
block_manager::ptr
persistent_data::open_bm(std::string const &path) {
block_address nr_blocks = get_nr_metadata_blocks(path);
block_manager<>::mode m = block_manager<>::READ_ONLY;
return block_manager<>::ptr(new block_manager<>(path, nr_blocks, 1, m));
block_manager::mode m = block_manager::READ_ONLY;
return block_manager::ptr(new block_manager(path, nr_blocks, 1, m));
}
transaction_manager::ptr
persistent_data::open_tm(block_manager<>::ptr bm, block_address superblock_location) {
persistent_data::open_tm(block_manager::ptr bm, block_address superblock_location) {
auto nr_blocks = bm->get_nr_blocks();
if (!nr_blocks)
throw runtime_error("Metadata is not large enough for superblock.");