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Allow to specify data area size

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This commit is contained in:
Vitaliy Filippov
2020-03-04 02:32:49 +03:00
parent c9f3654905
commit 8e63995306
2 changed files with 11 additions and 1 deletions
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blockstore_open.cpp
+10
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@@ -38,6 +38,7 @@ void blockstore_impl_t::parse_config(blockstore_config_t & config)
cfg_journal_size = strtoull(config["journal_size"].c_str(), NULL, 10);
data_device = config["data_device"];
data_offset = strtoull(config["data_offset"].c_str(), NULL, 10);
cfg_data_size = strtoull(config["data_size"].c_str(), NULL, 10);
meta_device = config["meta_device"];
meta_offset = strtoull(config["meta_offset"].c_str(), NULL, 10);
block_size = strtoull(config["block_size"].c_str(), NULL, 10);
@@ -151,6 +152,15 @@ void blockstore_impl_t::calc_lengths()
data_len = data_len < journal.offset-data_offset
? data_len : journal.offset-data_offset;
}
if (cfg_data_size != 0)
{
if (data_len < cfg_data_size)
{
throw std::runtime_error("Data area ("+std::to_string(data_len)+
" bytes) is less than configured size ("+std::to_string(cfg_data_size)+" bytes)");
}
data_len = cfg_data_size;
}
// meta
meta_area = (meta_fd == data_fd ? data_size : meta_size) - meta_offset;
if (meta_fd == data_fd && meta_offset <= data_offset)