1 // -*- mode:C; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
4 #include "librbd/object_map/LockRequest.h"
5 #include "cls/lock/cls_lock_client.h"
6 #include "common/dout.h"
7 #include "common/errno.h"
8 #include "librbd/ImageCtx.h"
9 #include "librbd/ObjectMap.h"
10 #include "librbd/Utils.h"
12 #define dout_subsys ceph_subsys_rbd
14 #define dout_prefix *_dout << "librbd::object_map::LockRequest: "
17 namespace object_map {
19 using util::create_rados_callback;
22 LockRequest<I>::LockRequest(I &image_ctx, Context *on_finish)
23 : m_image_ctx(image_ctx), m_on_finish(on_finish), m_broke_lock(false) {
27 void LockRequest<I>::send() {
32 void LockRequest<I>::send_lock() {
33 CephContext *cct = m_image_ctx.cct;
34 std::string oid(ObjectMap<>::object_map_name(m_image_ctx.id, CEPH_NOSNAP));
35 ldout(cct, 10) << this << " " << __func__ << ": oid=" << oid << dendl;
37 librados::ObjectWriteOperation op;
38 rados::cls::lock::lock(&op, RBD_LOCK_NAME, LOCK_EXCLUSIVE, "", "", "",
41 using klass = LockRequest<I>;
42 librados::AioCompletion *rados_completion =
43 create_rados_callback<klass, &klass::handle_lock>(this);
44 int r = m_image_ctx.md_ctx.aio_operate(oid, rados_completion, &op);
46 rados_completion->release();
50 Context *LockRequest<I>::handle_lock(int *ret_val) {
51 CephContext *cct = m_image_ctx.cct;
52 ldout(cct, 10) << this << " " << __func__ << ": r=" << *ret_val << dendl;
56 } else if (*ret_val == -EEXIST) {
57 // already locked by myself
60 } else if (m_broke_lock || *ret_val != -EBUSY) {
61 lderr(cct) << "failed to lock object map: " << cpp_strerror(*ret_val)
72 void LockRequest<I>::send_get_lock_info() {
73 CephContext *cct = m_image_ctx.cct;
74 std::string oid(ObjectMap<>::object_map_name(m_image_ctx.id, CEPH_NOSNAP));
75 ldout(cct, 10) << this << " " << __func__ << ": oid=" << oid << dendl;
77 librados::ObjectReadOperation op;
78 rados::cls::lock::get_lock_info_start(&op, RBD_LOCK_NAME);
80 using klass = LockRequest<I>;
81 librados::AioCompletion *rados_completion =
82 create_rados_callback<klass, &klass::handle_get_lock_info>(this);
83 int r = m_image_ctx.md_ctx.aio_operate(oid, rados_completion, &op, &m_out_bl);
85 rados_completion->release();
89 Context *LockRequest<I>::handle_get_lock_info(int *ret_val) {
90 CephContext *cct = m_image_ctx.cct;
91 ldout(cct, 10) << this << " " << __func__ << ": r=" << *ret_val << dendl;
93 if (*ret_val == -ENOENT) {
98 ClsLockType lock_type;
101 bufferlist::iterator it = m_out_bl.begin();
102 *ret_val = rados::cls::lock::get_lock_info_finish(&it, &m_lockers,
103 &lock_type, &lock_tag);
106 lderr(cct) << "failed to list object map locks: " << cpp_strerror(*ret_val)
116 template <typename I>
117 void LockRequest<I>::send_break_locks() {
118 CephContext *cct = m_image_ctx.cct;
119 std::string oid(ObjectMap<>::object_map_name(m_image_ctx.id, CEPH_NOSNAP));
120 ldout(cct, 10) << this << " " << __func__ << ": oid=" << oid << ", "
121 << "num_lockers=" << m_lockers.size() << dendl;
123 librados::ObjectWriteOperation op;
124 for (auto &locker : m_lockers) {
125 rados::cls::lock::break_lock(&op, RBD_LOCK_NAME, locker.first.cookie,
126 locker.first.locker);
129 using klass = LockRequest<I>;
130 librados::AioCompletion *rados_completion =
131 create_rados_callback<klass, &klass::handle_break_locks>(this);
132 int r = m_image_ctx.md_ctx.aio_operate(oid, rados_completion, &op);
134 rados_completion->release();
137 template <typename I>
138 Context *LockRequest<I>::handle_break_locks(int *ret_val) {
139 CephContext *cct = m_image_ctx.cct;
140 ldout(cct, 10) << this << " " << __func__ << ": r=" << *ret_val << dendl;
143 if (*ret_val == 0 || *ret_val == -ENOENT) {
148 lderr(cct) << "failed to break object map lock: " << cpp_strerror(*ret_val)
154 } // namespace object_map
155 } // namespace librbd
157 template class librbd::object_map::LockRequest<librbd::ImageCtx>;