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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "common/debug.h"
#include "common/errno.h"
#include "common/Timer.h"
#include "include/stringify.h"
#include "ServiceDaemon.h"
#define dout_context g_ceph_context
#define dout_subsys ceph_subsys_cephfs_mirror
#undef dout_prefix
#define dout_prefix *_dout << "cephfs::mirror::ServiceDaemon: " << this << " " \
<< __func__
namespace cephfs {
namespace mirror {
namespace {
struct AttributeDumpVisitor : public boost::static_visitor<void> {
ceph::Formatter *f;
std::string name;
AttributeDumpVisitor(ceph::Formatter *f, std::string_view name)
: f(f), name(name) {
}
void operator()(bool val) const {
f->dump_bool(name.c_str(), val);
}
void operator()(uint64_t val) const {
f->dump_unsigned(name.c_str(), val);
}
void operator()(const std::string &val) const {
f->dump_string(name.c_str(), val);
}
};
} // anonymous namespace
ServiceDaemon::ServiceDaemon(CephContext *cct, RadosRef rados)
: m_cct(cct),
m_rados(rados),
m_timer(new SafeTimer(cct, m_timer_lock, true)) {
m_timer->init();
}
ServiceDaemon::~ServiceDaemon() {
dout(10) << dendl;
{
std::scoped_lock timer_lock(m_timer_lock);
if (m_timer_ctx != nullptr) {
dout(5) << ": canceling timer task=" << m_timer_ctx << dendl;
m_timer->cancel_event(m_timer_ctx);
}
m_timer->shutdown();
}
delete m_timer;
}
int ServiceDaemon::init() {
dout(20) << dendl;
std::string id = m_cct->_conf->name.get_id();
if (id.find(CEPHFS_MIRROR_AUTH_ID_PREFIX) == 0) {
id = id.substr(CEPHFS_MIRROR_AUTH_ID_PREFIX.size());
}
std::string instance_id = stringify(m_rados->get_instance_id());
std::map<std::string, std::string> service_metadata = {{"id", id},
{"instance_id", instance_id}};
int r = m_rados->service_daemon_register("cephfs-mirror", instance_id,
service_metadata);
if (r < 0) {
return r;
}
return 0;
}
void ServiceDaemon::add_filesystem(fs_cluster_id_t fscid, std::string_view fs_name) {
dout(10) << ": fscid=" << fscid << ", fs_name=" << fs_name << dendl;
{
std::scoped_lock locker(m_lock);
m_filesystems.emplace(fscid, Filesystem(fs_name));
}
schedule_update_status();
}
void ServiceDaemon::remove_filesystem(fs_cluster_id_t fscid) {
dout(10) << ": fscid=" << fscid << dendl;
{
std::scoped_lock locker(m_lock);
m_filesystems.erase(fscid);
}
schedule_update_status();
}
void ServiceDaemon::add_peer(fs_cluster_id_t fscid, const Peer &peer) {
dout(10) << ": peer=" << peer << dendl;
{
std::scoped_lock locker(m_lock);
auto fs_it = m_filesystems.find(fscid);
if (fs_it == m_filesystems.end()) {
return;
}
fs_it->second.peer_attributes.emplace(peer, Attributes{});
}
schedule_update_status();
}
void ServiceDaemon::remove_peer(fs_cluster_id_t fscid, const Peer &peer) {
dout(10) << ": peer=" << peer << dendl;
{
std::scoped_lock locker(m_lock);
auto fs_it = m_filesystems.find(fscid);
if (fs_it == m_filesystems.end()) {
return;
}
fs_it->second.peer_attributes.erase(peer);
}
schedule_update_status();
}
void ServiceDaemon::add_or_update_fs_attribute(fs_cluster_id_t fscid, std::string_view key,
AttributeValue value) {
dout(10) << ": fscid=" << fscid << dendl;
{
std::scoped_lock locker(m_lock);
auto fs_it = m_filesystems.find(fscid);
if (fs_it == m_filesystems.end()) {
return;
}
fs_it->second.fs_attributes[std::string(key)] = value;
}
schedule_update_status();
}
void ServiceDaemon::add_or_update_peer_attribute(fs_cluster_id_t fscid, const Peer &peer,
std::string_view key, AttributeValue value) {
dout(10) << ": fscid=" << fscid << dendl;
{
std::scoped_lock locker(m_lock);
auto fs_it = m_filesystems.find(fscid);
if (fs_it == m_filesystems.end()) {
return;
}
auto peer_it = fs_it->second.peer_attributes.find(peer);
if (peer_it == fs_it->second.peer_attributes.end()) {
return;
}
peer_it->second[std::string(key)] = value;
}
schedule_update_status();
}
void ServiceDaemon::schedule_update_status() {
dout(10) << dendl;
std::scoped_lock timer_lock(m_timer_lock);
if (m_timer_ctx != nullptr) {
return;
}
m_timer_ctx = new LambdaContext([this] {
m_timer_ctx = nullptr;
update_status();
});
m_timer->add_event_after(1, m_timer_ctx);
}
void ServiceDaemon::update_status() {
dout(20) << ": " << m_filesystems.size() << " filesystem(s)" << dendl;
ceph::JSONFormatter f;
{
std::scoped_lock locker(m_lock);
f.open_object_section("filesystems");
for (auto &[fscid, filesystem] : m_filesystems) {
f.open_object_section(stringify(fscid).c_str());
f.dump_string("name", filesystem.fs_name);
for (auto &[attr_name, attr_value] : filesystem.fs_attributes) {
AttributeDumpVisitor visitor(&f, attr_name);
boost::apply_visitor(visitor, attr_value);
}
f.open_object_section("peers");
for (auto &[peer, attributes] : filesystem.peer_attributes) {
f.open_object_section(peer.uuid);
f.dump_object("remote", peer.remote);
f.open_object_section("stats");
for (auto &[attr_name, attr_value] : attributes) {
AttributeDumpVisitor visitor(&f, attr_name);
boost::apply_visitor(visitor, attr_value);
}
f.close_section(); // stats
f.close_section(); // peer.uuid
}
f.close_section(); // peers
f.close_section(); // fscid
}
f.close_section(); // filesystems
}
std::stringstream ss;
f.flush(ss);
int r = m_rados->service_daemon_update_status({{"status_json", ss.str()}});
if (r < 0) {
derr << ": failed to update service daemon status: " << cpp_strerror(r)
<< dendl;
}
}
} // namespace mirror
} // namespace cephfs
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