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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include <boost/lexical_cast.hpp>
#include <boost/algorithm/string.hpp>
#include "librbd/io/Types.h"
#include "librbd/io/IoOperations.h"
#include <map>
#include <vector>
namespace librbd {
namespace io {
#define RBD_IO_OPERATION_NAME_READ "read"
#define RBD_IO_OPERATION_NAME_WRITE "write"
#define RBD_IO_OPERATION_NAME_DISCARD "discard"
#define RBD_IO_OPERATION_NAME_WRITE_SAME "write_same"
#define RBD_IO_OPERATION_NAME_COMPARE_AND_WRITE "compare_and_write"
static const std::map<std::string, uint64_t> RBD_IO_OPERATION_MAP = {
{RBD_IO_OPERATION_NAME_READ, RBD_IO_OPERATION_READ},
{RBD_IO_OPERATION_NAME_WRITE, RBD_IO_OPERATION_WRITE},
{RBD_IO_OPERATION_NAME_DISCARD, RBD_IO_OPERATION_DISCARD},
{RBD_IO_OPERATION_NAME_WRITE_SAME, RBD_IO_OPERATION_WRITE_SAME},
{RBD_IO_OPERATION_NAME_COMPARE_AND_WRITE, RBD_IO_OPERATION_COMPARE_AND_WRITE},
};
static_assert((RBD_IO_OPERATION_COMPARE_AND_WRITE << 1) > RBD_IO_OPERATIONS_ALL,
"new RBD io operation added");
std::string rbd_io_operations_to_string(uint64_t operations,
std::ostream *err)
{
std::string r;
for (auto& i : RBD_IO_OPERATION_MAP) {
if (operations & i.second) {
if (!r.empty()) {
r += ",";
}
r += i.first;
operations &= ~i.second;
}
}
if (err && operations) {
*err << "ignoring unknown io operation mask 0x"
<< std::hex << operations << std::dec;
}
return r;
}
uint64_t rbd_io_operations_from_string(const std::string& orig_value,
std::ostream *err)
{
uint64_t operations = 0;
std::string value = orig_value;
boost::trim(value);
// empty string means default operations
if (!value.size()) {
return RBD_IO_OPERATIONS_DEFAULT;
}
try {
// numeric?
operations = boost::lexical_cast<uint64_t>(value);
// drop unrecognized bits
uint64_t unsupported_operations = (operations & ~RBD_IO_OPERATIONS_ALL);
if (unsupported_operations != 0ull) {
operations &= RBD_IO_OPERATIONS_ALL;
if (err) {
*err << "ignoring unknown operation mask 0x"
<< std::hex << unsupported_operations << std::dec;
}
}
} catch (boost::bad_lexical_cast&) {
// operation name list?
bool errors = false;
std::vector<std::string> operation_names;
boost::split(operation_names, value, boost::is_any_of(","));
for (auto operation_name: operation_names) {
boost::trim(operation_name);
auto operation_it = RBD_IO_OPERATION_MAP.find(operation_name);
if (operation_it != RBD_IO_OPERATION_MAP.end()) {
operations += operation_it->second;
} else if (err) {
if (errors) {
*err << ", ";
} else {
errors = true;
}
*err << "ignoring unknown operation " << operation_name;
}
}
}
return operations;
}
} // namespace io
} // namespace librbd
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