1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
4 #include "librbd/watcher/RewatchRequest.h"
5 #include "common/RWLock.h"
6 #include "common/errno.h"
7 #include "librbd/Utils.h"
9 #define dout_subsys ceph_subsys_rbd
11 #define dout_prefix *_dout << "librbd::watcher::RewatchRequest: " \
12 << this << " " << __func__ << " "
16 using util::create_context_callback;
17 using util::create_rados_callback;
23 RewatchRequest::RewatchRequest(librados::IoCtx& ioctx, const string& oid,
25 librados::WatchCtx2 *watch_ctx,
26 uint64_t *watch_handle, Context *on_finish)
27 : m_ioctx(ioctx), m_oid(oid), m_watch_lock(watch_lock),
28 m_watch_ctx(watch_ctx), m_watch_handle(watch_handle),
29 m_on_finish(on_finish) {
32 void RewatchRequest::send() {
36 void RewatchRequest::unwatch() {
37 assert(m_watch_lock.is_wlocked());
38 assert(*m_watch_handle != 0);
40 CephContext *cct = reinterpret_cast<CephContext *>(m_ioctx.cct());
41 ldout(cct, 10) << dendl;
43 librados::AioCompletion *aio_comp = create_rados_callback<
44 RewatchRequest, &RewatchRequest::handle_unwatch>(this);
45 int r = m_ioctx.aio_unwatch(*m_watch_handle, aio_comp);
52 void RewatchRequest::handle_unwatch(int r) {
53 CephContext *cct = reinterpret_cast<CephContext *>(m_ioctx.cct());
54 ldout(cct, 10) << "r=" << r << dendl;
56 if (r == -EBLACKLISTED) {
57 lderr(cct) << "client blacklisted" << dendl;
61 lderr(cct) << "failed to unwatch: " << cpp_strerror(r) << dendl;
66 void RewatchRequest::rewatch() {
67 CephContext *cct = reinterpret_cast<CephContext *>(m_ioctx.cct());
68 ldout(cct, 10) << dendl;
70 librados::AioCompletion *aio_comp = create_rados_callback<
71 RewatchRequest, &RewatchRequest::handle_rewatch>(this);
72 int r = m_ioctx.aio_watch(m_oid, aio_comp, &m_rewatch_handle, m_watch_ctx);
77 void RewatchRequest::handle_rewatch(int r) {
78 CephContext *cct = reinterpret_cast<CephContext *>(m_ioctx.cct());
79 ldout(cct, 10) << "r=" << r << dendl;
81 if (r == -EBLACKLISTED) {
82 lderr(cct) << "client blacklisted" << dendl;
85 } else if (r == -ENOENT) {
86 ldout(cct, 5) << "object deleted" << dendl;
90 lderr(cct) << "failed to watch object: " << cpp_strerror(r)
97 RWLock::WLocker watch_locker(m_watch_lock);
98 *m_watch_handle = m_rewatch_handle;
104 void RewatchRequest::finish(int r) {
105 CephContext *cct = reinterpret_cast<CephContext *>(m_ioctx.cct());
106 ldout(cct, 10) << "r=" << r << dendl;
108 m_on_finish->complete(r);
112 } // namespace watcher
113 } // namespace librbd