diff options
Diffstat (limited to 'src/librbd/api/Namespace.cc')
| -rw-r--r-- | src/librbd/api/Namespace.cc | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/src/librbd/api/Namespace.cc b/src/librbd/api/Namespace.cc new file mode 100644 index 00000000..ed7f8e28 --- /dev/null +++ b/src/librbd/api/Namespace.cc @@ -0,0 +1,227 @@ +// -*- 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>; |