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/UpdateRequest.h"
5 #include "include/rbd/object_map_types.h"
6 #include "include/stringify.h"
7 #include "common/dout.h"
8 #include "librbd/ImageCtx.h"
9 #include "librbd/ObjectMap.h"
10 #include "librbd/Utils.h"
11 #include "cls/lock/cls_lock_client.h"
14 #define dout_subsys ceph_subsys_rbd
16 #define dout_prefix *_dout << "librbd::object_map::UpdateRequest: " << this \
17 << " " << __func__ << ": "
20 namespace object_map {
24 // keep aligned to bit_vector 4K block sizes
25 const uint64_t MAX_OBJECTS_PER_UPDATE = 256 * (1 << 10);
30 void UpdateRequest<I>::send() {
35 void UpdateRequest<I>::update_object_map() {
36 assert(m_image_ctx.snap_lock.is_locked());
37 assert(m_image_ctx.object_map_lock.is_locked());
38 CephContext *cct = m_image_ctx.cct;
40 // break very large requests into manageable batches
41 m_update_end_object_no = MIN(
42 m_end_object_no, m_update_start_object_no + MAX_OBJECTS_PER_UPDATE);
44 std::string oid(ObjectMap<>::object_map_name(m_image_ctx.id, m_snap_id));
45 ldout(cct, 20) << "ictx=" << &m_image_ctx << ", oid=" << oid << ", "
46 << "[" << m_update_start_object_no << ","
47 << m_update_end_object_no << ") = "
49 stringify(static_cast<uint32_t>(*m_current_state)) : "")
50 << "->" << static_cast<uint32_t>(m_new_state)
53 librados::ObjectWriteOperation op;
54 if (m_snap_id == CEPH_NOSNAP) {
55 rados::cls::lock::assert_locked(&op, RBD_LOCK_NAME, LOCK_EXCLUSIVE, "", "");
57 cls_client::object_map_update(&op, m_update_start_object_no,
58 m_update_end_object_no, m_new_state,
61 auto rados_completion = librbd::util::create_rados_callback<
62 UpdateRequest<I>, &UpdateRequest<I>::handle_update_object_map>(this);
63 std::vector<librados::snap_t> snaps;
64 int r = m_image_ctx.md_ctx.aio_operate(
65 oid, rados_completion, &op, 0, snaps,
66 (m_trace.valid() ? m_trace.get_info() : nullptr));
68 rados_completion->release();
72 void UpdateRequest<I>::handle_update_object_map(int r) {
73 ldout(m_image_ctx.cct, 20) << "r=" << r << dendl;
76 RWLock::RLocker snap_locker(m_image_ctx.snap_lock);
77 RWLock::WLocker object_map_locker(m_image_ctx.object_map_lock);
78 update_in_memory_object_map();
80 if (m_update_end_object_no < m_end_object_no) {
81 m_update_start_object_no = m_update_end_object_no;
87 // no more batch updates to send
92 void UpdateRequest<I>::update_in_memory_object_map() {
93 assert(m_image_ctx.snap_lock.is_locked());
94 assert(m_image_ctx.object_map_lock.is_locked());
96 // rebuilding the object map might update on-disk only
97 if (m_snap_id == m_image_ctx.snap_id) {
98 ldout(m_image_ctx.cct, 20) << dendl;
100 auto it = m_object_map.begin() +
101 MIN(m_update_start_object_no, m_object_map.size());
102 auto end_it = m_object_map.begin() +
103 MIN(m_update_end_object_no, m_object_map.size());
104 for (; it != end_it; ++it) {
105 auto state_ref = *it;
106 uint8_t state = state_ref;
107 if (!m_current_state || state == *m_current_state ||
108 (*m_current_state == OBJECT_EXISTS && state == OBJECT_EXISTS_CLEAN)) {
109 state_ref = m_new_state;
115 template <typename I>
116 void UpdateRequest<I>::finish_request() {
119 } // namespace object_map
120 } // namespace librbd
122 template class librbd::object_map::UpdateRequest<librbd::ImageCtx>;