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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "librbd/journal/Utils.h"
#include "common/dout.h"
#include "common/errno.h"
#include "librbd/journal/Types.h"
#define dout_subsys ceph_subsys_rbd
#undef dout_prefix
#define dout_prefix *_dout << "librbd::journal::"
namespace librbd {
namespace journal {
namespace util {
int C_DecodeTag::decode(bufferlist::const_iterator *it, TagData *tag_data) {
try {
using ceph::decode;
decode(*tag_data, *it);
} catch (const buffer::error &err) {
return -EBADMSG;
}
return 0;
}
int C_DecodeTag::process(int r) {
if (r < 0) {
lderr(cct) << "C_DecodeTag: " << this << " " << __func__ << ": "
<< "failed to allocate tag: " << cpp_strerror(r)
<< dendl;
return r;
}
std::lock_guard locker{*lock};
*tag_tid = tag.tid;
auto data_it = tag.data.cbegin();
r = decode(&data_it, tag_data);
if (r < 0) {
lderr(cct) << "C_DecodeTag: " << this << " " << __func__ << ": "
<< "failed to decode allocated tag" << dendl;
return r;
}
ldout(cct, 20) << "C_DecodeTag: " << this << " " << __func__ << ": "
<< "allocated journal tag: "
<< "tid=" << tag.tid << ", "
<< "data=" << *tag_data << dendl;
return 0;
}
int C_DecodeTags::process(int r) {
if (r < 0) {
lderr(cct) << "C_DecodeTags: " << this << " " << __func__ << ": "
<< "failed to retrieve journal tags: " << cpp_strerror(r)
<< dendl;
return r;
}
if (tags.empty()) {
lderr(cct) << "C_DecodeTags: " << this << " " << __func__ << ": "
<< "no journal tags retrieved" << dendl;
return -ENOENT;
}
std::lock_guard locker{*lock};
*tag_tid = tags.back().tid;
auto data_it = tags.back().data.cbegin();
r = C_DecodeTag::decode(&data_it, tag_data);
if (r < 0) {
lderr(cct) << "C_DecodeTags: " << this << " " << __func__ << ": "
<< "failed to decode journal tag" << dendl;
return r;
}
ldout(cct, 20) << "C_DecodeTags: " << this << " " << __func__ << ": "
<< "most recent journal tag: "
<< "tid=" << *tag_tid << ", "
<< "data=" << *tag_data << dendl;
return 0;
}
} // namespace util
} // namespace journal
} // namespace librbd
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