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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab ft=cpp
#include "svc_zone_utils.h"
#include "svc_rados.h"
#include "svc_zone.h"
#include "rgw_zone.h"
using namespace std;
int RGWSI_ZoneUtils::do_start(optional_yield, const DoutPrefixProvider *dpp)
{
init_unique_trans_id_deps();
return 0;
}
string RGWSI_ZoneUtils::gen_host_id() {
/* uint64_t needs 16, two '-' separators and a trailing null */
const string& zone_name = zone_svc->get_zone().name;
const string& zonegroup_name = zone_svc->get_zonegroup().get_name();
char charbuf[16 + zone_name.size() + zonegroup_name.size() + 2 + 1];
snprintf(charbuf, sizeof(charbuf), "%llx-%s-%s", (unsigned long long)rados_svc->instance_id(), zone_name.c_str(), zonegroup_name.c_str());
return string(charbuf);
}
string RGWSI_ZoneUtils::unique_id(uint64_t unique_num)
{
char buf[32];
snprintf(buf, sizeof(buf), ".%llu.%llu", (unsigned long long)rados_svc->instance_id(), (unsigned long long)unique_num);
string s = zone_svc->get_zone_params().get_id() + buf;
return s;
}
void RGWSI_ZoneUtils::init_unique_trans_id_deps() {
char buf[16 + 2 + 1]; /* uint64_t needs 16, 2 hyphens add further 2 */
snprintf(buf, sizeof(buf), "-%llx-", (unsigned long long)rados_svc->instance_id());
url_encode(string(buf) + zone_svc->get_zone().name, trans_id_suffix);
}
/* In order to preserve compatibility with Swift API, transaction ID
* should contain at least 32 characters satisfying following spec:
* - first 21 chars must be in range [0-9a-f]. Swift uses this
* space for storing fragment of UUID obtained through a call to
* uuid4() function of Python's uuid module;
* - char no. 22 must be a hyphen;
* - at least 10 next characters constitute hex-formatted timestamp
* padded with zeroes if necessary. All bytes must be in [0-9a-f]
* range;
* - last, optional part of transaction ID is any url-encoded string
* without restriction on length. */
string RGWSI_ZoneUtils::unique_trans_id(const uint64_t unique_num) {
char buf[41]; /* 2 + 21 + 1 + 16 (timestamp can consume up to 16) + 1 */
time_t timestamp = time(NULL);
snprintf(buf, sizeof(buf), "tx%021llx-%010llx",
(unsigned long long)unique_num,
(unsigned long long)timestamp);
return string(buf) + trans_id_suffix;
}
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