rgw: add missing files

Signed-off-by: Yehuda Sadeh <yehuda@redhat.com>

src/rgw/services/svc_zone_utils.cc

@@ -0,0 +1,88 @@
+#include "svc_zone_utils.h"
+#include "svc_rados.h"
+#include "svc_zone.h"
+
+#include "rgw/rgw_zone.h"
+
+int RGWS_ZoneUtils::create_instance(const string& conf, RGWServiceInstanceRef *instance)
+{
+  instance->reset(new RGWSI_ZoneUtils(this, cct));
+  return 0;
+}
+
+std::map<string, RGWServiceInstance::dependency> RGWSI_ZoneUtils::get_deps()
+{
+  RGWServiceInstance::dependency dep1 = { .name = "rados",
+                                          .conf = "{}" };
+  RGWServiceInstance::dependency dep2 = { .name = "zone",
+                                          .conf = "{}" };
+  map<string, RGWServiceInstance::dependency> deps;
+  deps["rados_dep"] = dep1;
+  deps["zone_dep"] = dep2;
+  return deps;
+}
+
+int RGWSI_ZoneUtils::load(const string& conf, std::map<std::string, RGWServiceInstanceRef>& dep_refs)
+{
+  rados_svc = static_pointer_cast<RGWSI_RADOS>(dep_refs["rados_dep"]);
+  assert(rados_svc);
+
+  zone_svc = static_pointer_cast<RGWSI_Zone>(dep_refs["zone_dep"]);
+  assert(zone_svc);
+
+  return 0;
+}
+
+int RGWSI_ZoneUtils::init()
+{
+  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;
+}
+

src/rgw/services/svc_zone_utils.h

@@ -0,0 +1,41 @@
+#ifndef CEPH_RGW_SERVICES_ZONEUTILS_H
+#define CEPH_RGW_SERVICES_ZONEUTILS_H
+
+
+#include "rgw/rgw_service.h"
+
+
+class RGWSI_RADOS;
+class RGWSI_Zone;
+
+class RGWS_ZoneUtils : public RGWService
+{
+public:
+  RGWS_ZoneUtils(CephContext *cct) : RGWService(cct, "zone_utils") {}
+
+  int create_instance(const std::string& conf, RGWServiceInstanceRef *instance) override;
+};
+
+class RGWSI_ZoneUtils : public RGWServiceInstance
+{
+  std::shared_ptr<RGWSI_RADOS> rados_svc;
+  std::shared_ptr<RGWSI_Zone> zone_svc;
+
+  string trans_id_suffix;
+
+  std::map<std::string, RGWServiceInstance::dependency> get_deps() override;
+  int load(const std::string& conf, std::map<std::string, RGWServiceInstanceRef>& dep_refs) override;
+  int init() override;
+
+  void init_unique_trans_id_deps();
+
+public:
+  RGWSI_ZoneUtils(RGWService *svc, CephContext *cct): RGWServiceInstance(svc, cct) {}
+
+  string gen_host_id();
+  string unique_id(uint64_t unique_num);
+
+  string unique_trans_id(const uint64_t unique_num);
+};
+
+#endif