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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "common/errno.h"
#include "cls/rbd/cls_rbd_client.h"
#include "librbd/api/Namespace.h"
#include "librbd/ImageCtx.h"
#define dout_subsys ceph_subsys_rbd
#undef dout_prefix
#define dout_prefix *_dout << "librbd::api::Namespace: " << __func__ << ": "
namespace librbd {
namespace api {
namespace {
const std::list<std::string> POOL_OBJECTS {
RBD_CHILDREN,
RBD_GROUP_DIRECTORY,
RBD_INFO,
RBD_MIRRORING,
RBD_TASK,
RBD_TRASH,
RBD_DIRECTORY
};
} // anonymous namespace
template <typename I>
int Namespace<I>::create(librados::IoCtx& io_ctx, const std::string& name)
{
CephContext *cct = (CephContext *)io_ctx.cct();
ldout(cct, 5) << "name=" << name << dendl;
if (name.empty()) {
return -EINVAL;
}
librados::Rados rados(io_ctx);
int8_t require_osd_release;
int r = rados.get_min_compatible_osd(&require_osd_release);
if (r < 0) {
lderr(cct) << "failed to retrieve min OSD release: " << cpp_strerror(r)
<< dendl;
return r;
}
if (require_osd_release < CEPH_RELEASE_NAUTILUS) {
ldout(cct, 1) << "namespace support requires nautilus or later OSD"
<< dendl;
return -ENOSYS;
}
librados::IoCtx default_ns_ctx;
default_ns_ctx.dup(io_ctx);
default_ns_ctx.set_namespace("");
r = cls_client::namespace_add(&default_ns_ctx, name);
if (r < 0) {
lderr(cct) << "failed to add namespace: " << cpp_strerror(r) << dendl;
return r;
}
librados::IoCtx ns_ctx;
ns_ctx.dup(io_ctx);
ns_ctx.set_namespace(name);
r = cls_client::dir_state_set(&ns_ctx, RBD_DIRECTORY,
cls::rbd::DIRECTORY_STATE_READY);
if (r < 0) {
lderr(cct) << "failed to initialize image directory: " << cpp_strerror(r)
<< dendl;
goto rollback;
}
return 0;
rollback:
int ret_val = cls_client::namespace_remove(&default_ns_ctx, name);
if (ret_val < 0) {
lderr(cct) << "failed to remove namespace: " << cpp_strerror(ret_val) << dendl;
}
return r;
}
template <typename I>
int Namespace<I>::remove(librados::IoCtx& io_ctx, const std::string& name)
{
CephContext *cct = (CephContext *)io_ctx.cct();
ldout(cct, 5) << "name=" << name << dendl;
if (name.empty()) {
return -EINVAL;
}
librados::IoCtx default_ns_ctx;
default_ns_ctx.dup(io_ctx);
default_ns_ctx.set_namespace("");
librados::IoCtx ns_ctx;
ns_ctx.dup(io_ctx);
ns_ctx.set_namespace(name);
std::map<std::string, cls::rbd::TrashImageSpec> trash_entries;
librados::ObjectWriteOperation dir_op;
librbd::cls_client::dir_state_set(
&dir_op, cls::rbd::DIRECTORY_STATE_ADD_DISABLED);
dir_op.remove();
int r = ns_ctx.operate(RBD_DIRECTORY, &dir_op);
if (r == -EBUSY) {
ldout(cct, 5) << "image directory not empty" << dendl;
goto rollback;
} else if (r < 0 && r != -ENOENT) {
lderr(cct) << "failed to disable the namespace: " << cpp_strerror(r)
<< dendl;
return r;
}
r = cls_client::trash_list(&ns_ctx, "", 1, &trash_entries);
if (r < 0 && r != -ENOENT) {
lderr(cct) << "failed to list trash directory: " << cpp_strerror(r)
<< dendl;
return r;
} else if (!trash_entries.empty()) {
ldout(cct, 5) << "image trash not empty" << dendl;
goto rollback;
}
for (auto& oid : POOL_OBJECTS) {
r = ns_ctx.remove(oid);
if (r < 0 && r != -ENOENT) {
lderr(cct) << "failed to remove object '" << oid << "': "
<< cpp_strerror(r) << dendl;
return r;
}
}
r = cls_client::namespace_remove(&default_ns_ctx, name);
if (r < 0) {
lderr(cct) << "failed to remove namespace: " << cpp_strerror(r) << dendl;
return r;
}
return 0;
rollback:
r = librbd::cls_client::dir_state_set(
&ns_ctx, RBD_DIRECTORY, cls::rbd::DIRECTORY_STATE_READY);
if (r < 0) {
lderr(cct) << "failed to restore directory state: " << cpp_strerror(r)
<< dendl;
}
return -EBUSY;
}
template <typename I>
int Namespace<I>::list(IoCtx& io_ctx, vector<string> *names)
{
CephContext *cct = (CephContext *)io_ctx.cct();
ldout(cct, 5) << dendl;
librados::IoCtx default_ns_ctx;
default_ns_ctx.dup(io_ctx);
default_ns_ctx.set_namespace("");
int r;
int max_read = 1024;
std::string last_read = "";
do {
std::list<std::string> name_list;
r = cls_client::namespace_list(&default_ns_ctx, last_read, max_read,
&name_list);
if (r == -ENOENT) {
return 0;
} else if (r < 0) {
lderr(cct) << "error listing namespaces: " << cpp_strerror(r) << dendl;
return r;
}
names->insert(names->end(), name_list.begin(), name_list.end());
if (!name_list.empty()) {
last_read = name_list.back();
}
r = name_list.size();
} while (r == max_read);
return 0;
}
template <typename I>
int Namespace<I>::exists(librados::IoCtx& io_ctx, const std::string& name, bool *exists)
{
CephContext *cct = (CephContext *)io_ctx.cct();
ldout(cct, 5) << "name=" << name << dendl;
*exists = false;
if (name.empty()) {
return -EINVAL;
}
librados::IoCtx ns_ctx;
ns_ctx.dup(io_ctx);
ns_ctx.set_namespace(name);
int r = librbd::cls_client::dir_state_assert(&ns_ctx, RBD_DIRECTORY,
cls::rbd::DIRECTORY_STATE_READY);
if (r == 0) {
*exists = true;
} else if (r != -ENOENT) {
lderr(cct) << "error asserting namespace: " << cpp_strerror(r) << dendl;
return r;
}
return 0;
}
} // namespace api
} // namespace librbd
template class librbd::api::Namespace<librbd::ImageCtx>;
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