+++ /dev/null
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-
-#include "librbd/managed_lock/BreakRequest.h"
-#include "common/dout.h"
-#include "common/errno.h"
-#include "common/WorkQueue.h"
-#include "include/stringify.h"
-#include "cls/lock/cls_lock_client.h"
-#include "cls/lock/cls_lock_types.h"
-#include "librbd/ImageCtx.h"
-#include "librbd/Utils.h"
-#include "librbd/managed_lock/GetLockerRequest.h"
-
-#define dout_subsys ceph_subsys_rbd
-#undef dout_prefix
-#define dout_prefix *_dout << "librbd::managed_lock::BreakRequest: " << this \
- << " " << __func__ << ": "
-
-namespace librbd {
-namespace managed_lock {
-
-using util::create_context_callback;
-using util::create_rados_callback;
-
-namespace {
-
-struct C_BlacklistClient : public Context {
- librados::IoCtx &ioctx;
- std::string locker_address;
- uint32_t expire_seconds;
- Context *on_finish;
-
- C_BlacklistClient(librados::IoCtx &ioctx, const std::string &locker_address,
- uint32_t expire_seconds, Context *on_finish)
- : ioctx(ioctx), locker_address(locker_address),
- expire_seconds(expire_seconds), on_finish(on_finish) {
- }
-
- void finish(int r) override {
- librados::Rados rados(ioctx);
- r = rados.blacklist_add(locker_address, expire_seconds);
- on_finish->complete(r);
- }
-};
-
-} // anonymous namespace
-
-template <typename I>
-BreakRequest<I>::BreakRequest(librados::IoCtx& ioctx, ContextWQ *work_queue,
- const std::string& oid, const Locker &locker,
- bool exclusive, bool blacklist_locker,
- uint32_t blacklist_expire_seconds,
- bool force_break_lock, Context *on_finish)
- : m_ioctx(ioctx), m_cct(reinterpret_cast<CephContext *>(m_ioctx.cct())),
- m_work_queue(work_queue), m_oid(oid), m_locker(locker),
- m_exclusive(exclusive), m_blacklist_locker(blacklist_locker),
- m_blacklist_expire_seconds(blacklist_expire_seconds),
- m_force_break_lock(force_break_lock), m_on_finish(on_finish) {
-}
-
-template <typename I>
-void BreakRequest<I>::send() {
- send_get_watchers();
-}
-
-template <typename I>
-void BreakRequest<I>::send_get_watchers() {
- ldout(m_cct, 10) << dendl;
-
- librados::ObjectReadOperation op;
- op.list_watchers(&m_watchers, &m_watchers_ret_val);
-
- using klass = BreakRequest<I>;
- librados::AioCompletion *rados_completion =
- create_rados_callback<klass, &klass::handle_get_watchers>(this);
- m_out_bl.clear();
- int r = m_ioctx.aio_operate(m_oid, rados_completion, &op, &m_out_bl);
- assert(r == 0);
- rados_completion->release();
-}
-
-template <typename I>
-void BreakRequest<I>::handle_get_watchers(int r) {
- ldout(m_cct, 10) << "r=" << r << dendl;
-
- if (r == 0) {
- r = m_watchers_ret_val;
- }
- if (r < 0) {
- lderr(m_cct) << "failed to retrieve watchers: " << cpp_strerror(r)
- << dendl;
- finish(r);
- return;
- }
-
- bool found_alive_locker = false;
- for (auto &watcher : m_watchers) {
- ldout(m_cct, 20) << "watcher=["
- << "addr=" << watcher.addr << ", "
- << "entity=client." << watcher.watcher_id << "]" << dendl;
-
- if ((strncmp(m_locker.address.c_str(),
- watcher.addr, sizeof(watcher.addr)) == 0) &&
- (m_locker.handle == watcher.cookie)) {
- ldout(m_cct, 10) << "lock owner is still alive" << dendl;
- found_alive_locker = true;
- }
- }
-
- if (!m_force_break_lock && found_alive_locker) {
- finish(-EAGAIN);
- return;
- }
-
- send_get_locker();
-}
-
-template <typename I>
-void BreakRequest<I>::send_get_locker() {
- ldout(m_cct, 10) << dendl;
-
- using klass = BreakRequest<I>;
- Context *ctx = create_context_callback<klass, &klass::handle_get_locker>(
- this);
- auto req = GetLockerRequest<I>::create(m_ioctx, m_oid, m_exclusive,
- &m_refreshed_locker, ctx);
- req->send();
-}
-
-template <typename I>
-void BreakRequest<I>::handle_get_locker(int r) {
- ldout(m_cct, 10) << "r=" << r << dendl;
-
- if (r == -ENOENT) {
- ldout(m_cct, 5) << "no lock owner" << dendl;
- finish(0);
- return;
- } else if (r < 0 && r != -EBUSY) {
- lderr(m_cct) << "failed to retrieve lockers: " << cpp_strerror(r) << dendl;
- finish(r);
- return;
- } else if (r < 0) {
- m_refreshed_locker = {};
- }
-
- if (m_refreshed_locker != m_locker || m_refreshed_locker == Locker{}) {
- ldout(m_cct, 5) << "no longer lock owner" << dendl;
- finish(-EAGAIN);
- return;
- }
-
- send_blacklist();
-}
-
-template <typename I>
-void BreakRequest<I>::send_blacklist() {
- if (!m_blacklist_locker) {
- send_break_lock();
- return;
- }
-
- entity_name_t entity_name = entity_name_t::CLIENT(m_ioctx.get_instance_id());
- ldout(m_cct, 10) << "local entity=" << entity_name << ", "
- << "locker entity=" << m_locker.entity << dendl;
-
- if (m_locker.entity == entity_name) {
- lderr(m_cct) << "attempting to self-blacklist" << dendl;
- finish(-EINVAL);
- return;
- }
-
- // TODO: need async version of RadosClient::blacklist_add
- using klass = BreakRequest<I>;
- Context *ctx = create_context_callback<klass, &klass::handle_blacklist>(
- this);
- m_work_queue->queue(new C_BlacklistClient(m_ioctx, m_locker.address,
- m_blacklist_expire_seconds, ctx),
- 0);
-}
-
-template <typename I>
-void BreakRequest<I>::handle_blacklist(int r) {
- ldout(m_cct, 10) << "r=" << r << dendl;
-
- if (r < 0) {
- lderr(m_cct) << "failed to blacklist lock owner: " << cpp_strerror(r)
- << dendl;
- finish(r);
- return;
- }
- send_break_lock();
-}
-
-template <typename I>
-void BreakRequest<I>::send_break_lock() {
- ldout(m_cct, 10) << dendl;
-
- librados::ObjectWriteOperation op;
- rados::cls::lock::break_lock(&op, RBD_LOCK_NAME, m_locker.cookie,
- m_locker.entity);
-
- using klass = BreakRequest<I>;
- librados::AioCompletion *rados_completion =
- create_rados_callback<klass, &klass::handle_break_lock>(this);
- int r = m_ioctx.aio_operate(m_oid, rados_completion, &op);
- assert(r == 0);
- rados_completion->release();
-}
-
-template <typename I>
-void BreakRequest<I>::handle_break_lock(int r) {
- ldout(m_cct, 10) << "r=" << r << dendl;
-
- if (r < 0 && r != -ENOENT) {
- lderr(m_cct) << "failed to break lock: " << cpp_strerror(r) << dendl;
- finish(r);
- return;
- }
-
- finish(0);
-}
-
-template <typename I>
-void BreakRequest<I>::finish(int r) {
- ldout(m_cct, 10) << "r=" << r << dendl;
-
- m_on_finish->complete(r);
- delete this;
-}
-
-} // namespace managed_lock
-} // namespace librbd
-
-template class librbd::managed_lock::BreakRequest<librbd::ImageCtx>;
Code Review / stor4nfv.git / blobdiff