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git.proxmox.com Git - ceph.git/blob - ceph/src/librbd/object_map/LockRequest.cc
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 auto it
= m_out_bl
.cbegin();
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
>;