--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "common/errno.h"
+#include "rgw_rest_realm.h"
+#include "rgw_rest_s3.h"
+#include "rgw_rest_config.h"
+
+#include "include/assert.h"
+
+#define dout_subsys ceph_subsys_rgw
+
+// reject 'period push' if we would have to fetch too many intermediate periods
+static const uint32_t PERIOD_HISTORY_FETCH_MAX = 64;
+
+// base period op, shared between Get and Post
+class RGWOp_Period_Base : public RGWRESTOp {
+ protected:
+ RGWPeriod period;
+ std::ostringstream error_stream;
+ public:
+ int verify_permission() override { return 0; }
+ void send_response() override;
+};
+
+// reply with the period object on success
+void RGWOp_Period_Base::send_response()
+{
+ set_req_state_err(s, http_ret, error_stream.str());
+ dump_errno(s);
+
+ if (http_ret < 0) {
+ if (!s->err.message.empty()) {
+ ldout(s->cct, 4) << "Request failed with " << http_ret
+ << ": " << s->err.message << dendl;
+ }
+ end_header(s);
+ return;
+ }
+
+ encode_json("period", period, s->formatter);
+ end_header(s, NULL, "application/json", s->formatter->get_len());
+ flusher.flush();
+}
+
+// GET /admin/realm/period
+class RGWOp_Period_Get : public RGWOp_Period_Base {
+ public:
+ void execute() override;
+ const string name() override { return "get_period"; }
+};
+
+void RGWOp_Period_Get::execute()
+{
+ string realm_id, realm_name, period_id;
+ epoch_t epoch = 0;
+ RESTArgs::get_string(s, "realm_id", realm_id, &realm_id);
+ RESTArgs::get_string(s, "realm_name", realm_name, &realm_name);
+ RESTArgs::get_string(s, "period_id", period_id, &period_id);
+ RESTArgs::get_uint32(s, "epoch", 0, &epoch);
+
+ period.set_id(period_id);
+ period.set_epoch(epoch);
+
+ http_ret = period.init(store->ctx(), store, realm_id, realm_name);
+ if (http_ret < 0)
+ ldout(store->ctx(), 5) << "failed to read period" << dendl;
+}
+
+// POST /admin/realm/period
+class RGWOp_Period_Post : public RGWOp_Period_Base {
+ public:
+ void execute() override;
+ const string name() override { return "post_period"; }
+};
+
+void RGWOp_Period_Post::execute()
+{
+ auto cct = store->ctx();
+
+ // initialize the period without reading from rados
+ period.init(cct, store, false);
+
+ // decode the period from input
+ const auto max_size = cct->_conf->rgw_max_put_param_size;
+ bool empty;
+ http_ret = rgw_rest_get_json_input(cct, s, period, max_size, &empty);
+ if (http_ret < 0) {
+ lderr(cct) << "failed to decode period" << dendl;
+ return;
+ }
+
+ // require period.realm_id to match our realm
+ if (period.get_realm() != store->realm.get_id()) {
+ error_stream << "period with realm id " << period.get_realm()
+ << " doesn't match current realm " << store->realm.get_id() << std::endl;
+ http_ret = -EINVAL;
+ return;
+ }
+
+ // load the realm and current period from rados; there may be a more recent
+ // period that we haven't restarted with yet. we also don't want to modify
+ // the objects in use by RGWRados
+ RGWRealm realm(period.get_realm());
+ http_ret = realm.init(cct, store);
+ if (http_ret < 0) {
+ lderr(cct) << "failed to read current realm: "
+ << cpp_strerror(-http_ret) << dendl;
+ return;
+ }
+
+ RGWPeriod current_period;
+ http_ret = current_period.init(cct, store, realm.get_id());
+ if (http_ret < 0) {
+ lderr(cct) << "failed to read current period: "
+ << cpp_strerror(-http_ret) << dendl;
+ return;
+ }
+
+ // if period id is empty, handle as 'period commit'
+ if (period.get_id().empty()) {
+ http_ret = period.commit(realm, current_period, error_stream);
+ if (http_ret < 0) {
+ lderr(cct) << "master zone failed to commit period" << dendl;
+ }
+ return;
+ }
+
+ // if it's not period commit, nobody is allowed to push to the master zone
+ if (period.get_master_zone() == store->get_zone_params().get_id()) {
+ ldout(cct, 10) << "master zone rejecting period id="
+ << period.get_id() << " epoch=" << period.get_epoch() << dendl;
+ http_ret = -EINVAL; // XXX: error code
+ return;
+ }
+
+ // write the period to rados
+ http_ret = period.store_info(false);
+ if (http_ret < 0) {
+ lderr(cct) << "failed to store period " << period.get_id() << dendl;
+ return;
+ }
+ // set as latest epoch
+ http_ret = period.update_latest_epoch(period.get_epoch());
+ if (http_ret == -EEXIST) {
+ // already have this epoch (or a more recent one)
+ ldout(cct, 4) << "already have epoch >= " << period.get_epoch()
+ << " for period " << period.get_id() << dendl;
+ http_ret = 0;
+ return;
+ }
+ if (http_ret < 0) {
+ lderr(cct) << "failed to set latest epoch" << dendl;
+ return;
+ }
+
+ // decide whether we can set_current_period() or set_latest_epoch()
+ if (period.get_id() != current_period.get_id()) {
+ auto current_epoch = current_period.get_realm_epoch();
+ // discard periods in the past
+ if (period.get_realm_epoch() < current_epoch) {
+ ldout(cct, 10) << "discarding period " << period.get_id()
+ << " with realm epoch " << period.get_realm_epoch()
+ << " older than current epoch " << current_epoch << dendl;
+ // return success to ack that we have this period
+ return;
+ }
+ // discard periods too far in the future
+ if (period.get_realm_epoch() > current_epoch + PERIOD_HISTORY_FETCH_MAX) {
+ lderr(cct) << "discarding period " << period.get_id()
+ << " with realm epoch " << period.get_realm_epoch() << " too far in "
+ "the future from current epoch " << current_epoch << dendl;
+ http_ret = -ENOENT; // XXX: error code
+ return;
+ }
+ // attach a copy of the period into the period history
+ auto cursor = store->period_history->attach(RGWPeriod{period});
+ if (!cursor) {
+ // we're missing some history between the new period and current_period
+ http_ret = cursor.get_error();
+ lderr(cct) << "failed to collect the periods between current period "
+ << current_period.get_id() << " (realm epoch " << current_epoch
+ << ") and the new period " << period.get_id()
+ << " (realm epoch " << period.get_realm_epoch()
+ << "): " << cpp_strerror(-http_ret) << dendl;
+ return;
+ }
+ if (cursor.has_next()) {
+ // don't switch if we have a newer period in our history
+ ldout(cct, 4) << "attached period " << period.get_id()
+ << " to history, but the history contains newer periods" << dendl;
+ return;
+ }
+ // set as current period
+ http_ret = realm.set_current_period(period);
+ if (http_ret < 0) {
+ lderr(cct) << "failed to update realm's current period" << dendl;
+ return;
+ }
+ ldout(cct, 4) << "period " << period.get_id()
+ << " is newer than current period " << current_period.get_id()
+ << ", updating realm's current period and notifying zone" << dendl;
+ realm.notify_new_period(period);
+ return;
+ }
+ // reflect the period into our local objects
+ http_ret = period.reflect();
+ if (http_ret < 0) {
+ lderr(cct) << "failed to update local objects: "
+ << cpp_strerror(-http_ret) << dendl;
+ return;
+ }
+ ldout(cct, 4) << "period epoch " << period.get_epoch()
+ << " is newer than current epoch " << current_period.get_epoch()
+ << ", updating period's latest epoch and notifying zone" << dendl;
+ realm.notify_new_period(period);
+ // update the period history
+ store->period_history->insert(RGWPeriod{period});
+}
+
+class RGWHandler_Period : public RGWHandler_Auth_S3 {
+ protected:
+ using RGWHandler_Auth_S3::RGWHandler_Auth_S3;
+
+ RGWOp *op_get() override { return new RGWOp_Period_Get; }
+ RGWOp *op_post() override { return new RGWOp_Period_Post; }
+};
+
+class RGWRESTMgr_Period : public RGWRESTMgr {
+ public:
+ RGWHandler_REST* get_handler(struct req_state*,
+ const rgw::auth::StrategyRegistry& auth_registry,
+ const std::string&) override {
+ return new RGWHandler_Period(auth_registry);
+ }
+};
+
+
+// GET /admin/realm
+class RGWOp_Realm_Get : public RGWRESTOp {
+ std::unique_ptr<RGWRealm> realm;
+public:
+ int verify_permission() override { return 0; }
+ void execute() override;
+ void send_response() override;
+ const string name() override { return "get_realm"; }
+};
+
+void RGWOp_Realm_Get::execute()
+{
+ string id;
+ RESTArgs::get_string(s, "id", id, &id);
+ string name;
+ RESTArgs::get_string(s, "name", name, &name);
+
+ // read realm
+ realm.reset(new RGWRealm(id, name));
+ http_ret = realm->init(g_ceph_context, store);
+ if (http_ret < 0)
+ lderr(store->ctx()) << "failed to read realm id=" << id
+ << " name=" << name << dendl;
+}
+
+void RGWOp_Realm_Get::send_response()
+{
+ set_req_state_err(s, http_ret);
+ dump_errno(s);
+
+ if (http_ret < 0) {
+ end_header(s);
+ return;
+ }
+
+ encode_json("realm", *realm, s->formatter);
+ end_header(s, NULL, "application/json", s->formatter->get_len());
+ flusher.flush();
+}
+
+class RGWHandler_Realm : public RGWHandler_Auth_S3 {
+protected:
+ using RGWHandler_Auth_S3::RGWHandler_Auth_S3;
+ RGWOp *op_get() override { return new RGWOp_Realm_Get; }
+};
+
+RGWRESTMgr_Realm::RGWRESTMgr_Realm()
+{
+ // add the /admin/realm/period resource
+ register_resource("period", new RGWRESTMgr_Period);
+}
+
+RGWHandler_REST*
+RGWRESTMgr_Realm::get_handler(struct req_state*,
+ const rgw::auth::StrategyRegistry& auth_registry,
+ const std::string&)
+{
+ return new RGWHandler_Realm(auth_registry);
+}
Code Review / stor4nfv.git / blobdiff