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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/api/PoolMetadata.h"
#include "cls/rbd/cls_rbd_client.h"
#include "common/dout.h"
#include "common/errno.h"
#include "librbd/Utils.h"
#include "librbd/api/Config.h"
#define dout_subsys ceph_subsys_rbd
#undef dout_prefix
#define dout_prefix *_dout << "librbd::PoolMetadata: " << __func__ << ": "
namespace librbd {
namespace api {
namespace {
void update_pool_timestamp(librados::IoCtx& io_ctx) {
CephContext *cct = (CephContext *)io_ctx.cct();
auto now = ceph_clock_now();
std::string cmd =
R"({)"
R"("prefix": "config set", )"
R"("who": "global", )"
R"("name": "rbd_config_pool_override_update_timestamp", )"
R"("value": ")" + stringify(now.sec()) + R"(")"
R"(})";
librados::Rados rados(io_ctx);
bufferlist in_bl;
std::string ss;
int r = rados.mon_command(cmd, in_bl, nullptr, &ss);
if (r < 0) {
lderr(cct) << "failed to notify clients of pool config update: "
<< cpp_strerror(r) << dendl;
}
}
} // anonymous namespace
template <typename I>
int PoolMetadata<I>::get(librados::IoCtx& io_ctx,
const std::string &key, std::string *value) {
CephContext *cct = (CephContext *)io_ctx.cct();
int r = cls_client::metadata_get(&io_ctx, RBD_INFO, key, value);
if (r < 0 && r != -ENOENT) {
lderr(cct) << "failed reading metadata " << key << ": " << cpp_strerror(r)
<< dendl;
}
return r;
}
template <typename I>
int PoolMetadata<I>::set(librados::IoCtx& io_ctx, const std::string &key,
const std::string &value) {
CephContext *cct = (CephContext *)io_ctx.cct();
bool need_update_pool_timestamp = false;
std::string config_key;
if (util::is_metadata_config_override(key, &config_key)) {
if (!librbd::api::Config<I>::is_option_name(io_ctx, config_key)) {
lderr(cct) << "validation for " << key
<< " failed: not allowed pool level override" << dendl;
return -EINVAL;
}
int r = ConfigProxy{false}.set_val(config_key.c_str(), value);
if (r < 0) {
lderr(cct) << "validation for " << key << " failed: " << cpp_strerror(r)
<< dendl;
return -EINVAL;
}
need_update_pool_timestamp = true;
}
ceph::bufferlist bl;
bl.append(value);
int r = cls_client::metadata_set(&io_ctx, RBD_INFO, {{key, bl}});
if (r < 0) {
lderr(cct) << "failed setting metadata " << key << ": " << cpp_strerror(r)
<< dendl;
return r;
}
if (need_update_pool_timestamp) {
update_pool_timestamp(io_ctx);
}
return 0;
}
template <typename I>
int PoolMetadata<I>::remove(librados::IoCtx& io_ctx, const std::string &key) {
CephContext *cct = (CephContext *)io_ctx.cct();
std::string value;
int r = cls_client::metadata_get(&io_ctx, RBD_INFO, key, &value);
if (r < 0) {
if (r == -ENOENT) {
ldout(cct, 1) << "metadata " << key << " does not exist" << dendl;
} else {
lderr(cct) << "failed reading metadata " << key << ": " << cpp_strerror(r)
<< dendl;
}
return r;
}
r = cls_client::metadata_remove(&io_ctx, RBD_INFO, key);
if (r < 0) {
lderr(cct) << "failed removing metadata " << key << ": " << cpp_strerror(r)
<< dendl;
return r;
}
std::string config_key;
if (util::is_metadata_config_override(key, &config_key)) {
update_pool_timestamp(io_ctx);
}
return 0;
}
template <typename I>
int PoolMetadata<I>::list(librados::IoCtx& io_ctx, const std::string &start,
uint64_t max,
std::map<std::string, ceph::bufferlist> *pairs) {
CephContext *cct = (CephContext *)io_ctx.cct();
int r = cls_client::metadata_list(&io_ctx, RBD_INFO, start, max, pairs);
if (r == -ENOENT) {
r = 0;
} else if (r < 0) {
lderr(cct) << "failed listing metadata: " << cpp_strerror(r)
<< dendl;
return r;
}
return 0;
}
} // namespace api
} // namespace librbd
template class librbd::api::PoolMetadata<librbd::ImageCtx>;
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