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Diffstat (limited to '')
| -rw-r--r-- | src/librbd/image/RefreshRequest.h | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/src/librbd/image/RefreshRequest.h b/src/librbd/image/RefreshRequest.h new file mode 100644 index 000000000..42f4b4669 --- /dev/null +++ b/src/librbd/image/RefreshRequest.h @@ -0,0 +1,275 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#ifndef CEPH_LIBRBD_IMAGE_REFRESH_REQUEST_H +#define CEPH_LIBRBD_IMAGE_REFRESH_REQUEST_H + +#include "include/int_types.h" +#include "include/buffer.h" +#include "include/utime.h" +#include "common/snap_types.h" +#include "cls/lock/cls_lock_types.h" +#include "librbd/ImageCtx.h" +#include "librbd/Types.h" +#include <string> +#include <vector> + +class Context; + +namespace librbd { + +class ImageCtx; + +namespace image { + +template<typename> class RefreshParentRequest; + +template<typename ImageCtxT = ImageCtx> +class RefreshRequest { +public: + static constexpr int MAX_ENOENT_RETRIES = 10; + + static RefreshRequest *create(ImageCtxT &image_ctx, bool acquiring_lock, + bool skip_open_parent, Context *on_finish) { + return new RefreshRequest(image_ctx, acquiring_lock, skip_open_parent, + on_finish); + } + + RefreshRequest(ImageCtxT &image_ctx, bool acquiring_lock, + bool skip_open_parent, Context *on_finish); + ~RefreshRequest(); + + void send(); + +private: + /** + * @verbatim + * + * <start> < * * * * * * * * * * * * * * * * * * * * * * * * * * (ENOENT) + * ^ | * + * * | (v1) * + * * |-----> V1_READ_HEADER -------------> GET_MIGRATION_HEADER (skip if not + * * | | migrating) + * * | (v2) v + * * \-----> V2_GET_MUTABLE_METADATA V1_GET_SNAPSHOTS + * * * | | + * * * | -EOPNOTSUPP v + * * * | * * * V1_GET_LOCKS + * * * | * * | + * * * v v * v + * * * V2_GET_PARENT <apply> + * * * | | + * * v | + * * * * * * GET_MIGRATION_HEADER (skip if not | + * (ENOENT) | migrating) | + * v | + * * V2_GET_METADATA | + * * | | + * * v | + * * V2_GET_POOL_METADATA | + * * | | + * * v (skip if not enabled) | + * * V2_GET_OP_FEATURES | + * * | | + * * v | + * * V2_GET_GROUP | + * * | | + * * | -EOPNOTSUPP | + * * | * * * | + * * | * * | + * * v v * | + * * * V2_GET_SNAPSHOTS (skip if no snaps) | + * (ENOENT) | | + * * v | + * * * V2_REFRESH_PARENT (skip if no parent or | + * (ENOENT) | refresh not needed) | + * v | + * V2_INIT_EXCLUSIVE_LOCK (skip if lock | + * | active or disabled) | + * v | + * V2_OPEN_OBJECT_MAP (skip if map | + * | active or disabled) | + * v | + * V2_OPEN_JOURNAL (skip if journal | + * | active or disabled) | + * v | + * V2_BLOCK_WRITES (skip if journal not | + * | disabled) | + * v | + * <apply> | + * | | + * v | + * V2_FINALIZE_REFRESH_PARENT (skip if refresh | + * | not needed) | + * (error) v | + * * * * * > V2_SHUT_DOWN_EXCLUSIVE_LOCK (skip if lock | + * | active or enabled) | + * v | + * V2_CLOSE_JOURNAL (skip if journal inactive | + * | or enabled) | + * v | + * V2_CLOSE_OBJECT_MAP (skip if map inactive | + * | or enabled) | + * | | + * \-------------------\/--------------------/ + * | + * v + * FLUSH (skip if no new + * | snapshots) + * v + * <finish> + * + * @endverbatim + */ + + enum LegacySnapshot { + LEGACY_SNAPSHOT_DISABLED, + LEGACY_SNAPSHOT_ENABLED, + LEGACY_SNAPSHOT_ENABLED_NO_TIMESTAMP + }; + + ImageCtxT &m_image_ctx; + bool m_acquiring_lock; + bool m_skip_open_parent_image; + Context *m_on_finish; + + cls::rbd::MigrationSpec m_migration_spec; + int m_error_result; + bool m_flush_aio; + decltype(m_image_ctx.exclusive_lock) m_exclusive_lock; + decltype(m_image_ctx.object_map) m_object_map; + decltype(m_image_ctx.journal) m_journal; + RefreshParentRequest<ImageCtxT> *m_refresh_parent; + + bufferlist m_out_bl; + + bool m_legacy_parent = false; + LegacySnapshot m_legacy_snapshot = LEGACY_SNAPSHOT_DISABLED; + + int m_enoent_retries = 0; + + uint8_t m_order = 0; + uint64_t m_size = 0; + uint64_t m_features = 0; + uint64_t m_incompatible_features = 0; + uint64_t m_flags = 0; + uint64_t m_op_features = 0; + uint32_t m_read_only_flags = 0U; + bool m_read_only = false; + + librados::IoCtx m_pool_metadata_io_ctx; + std::map<std::string, bufferlist> m_metadata; + + std::string m_object_prefix; + ParentImageInfo m_parent_md; + bool m_head_parent_overlap = false; + cls::rbd::GroupSpec m_group_spec; + + ::SnapContext m_snapc; + std::vector<cls::rbd::SnapshotInfo> m_snap_infos; + std::vector<ParentImageInfo> m_snap_parents; + std::vector<uint8_t> m_snap_protection; + std::vector<uint64_t> m_snap_flags; + + std::map<rados::cls::lock::locker_id_t, + rados::cls::lock::locker_info_t> m_lockers; + std::string m_lock_tag; + bool m_exclusive_locked = false; + + bool m_blocked_writes = false; + bool m_incomplete_update = false; + + void send_get_migration_header(); + Context *handle_get_migration_header(int *result); + + void send_v1_read_header(); + Context *handle_v1_read_header(int *result); + + void send_v1_get_snapshots(); + Context *handle_v1_get_snapshots(int *result); + + void send_v1_get_locks(); + Context *handle_v1_get_locks(int *result); + + void send_v1_apply(); + Context *handle_v1_apply(int *result); + + void send_v2_get_mutable_metadata(); + Context *handle_v2_get_mutable_metadata(int *result); + + void send_v2_get_parent(); + Context *handle_v2_get_parent(int *result); + + void send_v2_get_metadata(); + Context *handle_v2_get_metadata(int *result); + + void send_v2_get_pool_metadata(); + Context *handle_v2_get_pool_metadata(int *result); + + void send_v2_get_op_features(); + Context *handle_v2_get_op_features(int *result); + + void send_v2_get_group(); + Context *handle_v2_get_group(int *result); + + void send_v2_get_snapshots(); + Context *handle_v2_get_snapshots(int *result); + + void send_v2_get_snapshots_legacy(); + Context *handle_v2_get_snapshots_legacy(int *result); + + void send_v2_refresh_parent(); + Context *handle_v2_refresh_parent(int *result); + + void send_v2_init_exclusive_lock(); + Context *handle_v2_init_exclusive_lock(int *result); + + void send_v2_open_journal(); + Context *handle_v2_open_journal(int *result); + + void send_v2_block_writes(); + Context *handle_v2_block_writes(int *result); + + void send_v2_open_object_map(); + Context *handle_v2_open_object_map(int *result); + + void send_v2_apply(); + Context *handle_v2_apply(int *result); + + Context *send_v2_finalize_refresh_parent(); + Context *handle_v2_finalize_refresh_parent(int *result); + + Context *send_v2_shut_down_exclusive_lock(); + Context *handle_v2_shut_down_exclusive_lock(int *result); + + Context *send_v2_close_journal(); + Context *handle_v2_close_journal(int *result); + + Context *send_v2_close_object_map(); + Context *handle_v2_close_object_map(int *result); + + Context *send_flush_aio(); + Context *handle_flush_aio(int *result); + + Context *handle_error(int *result); + + void save_result(int *result) { + if (m_error_result == 0 && *result < 0) { + m_error_result = *result; + } + } + + void apply(); + int get_parent_info(uint64_t snap_id, ParentImageInfo *parent_md, + MigrationInfo *migration_info); + int get_migration_info(ParentImageInfo *parent_md, + MigrationInfo *migration_info, + bool* migration_info_valid); +}; + +} // namespace image +} // namespace librbd + +extern template class librbd::image::RefreshRequest<librbd::ImageCtx>; + +#endif // CEPH_LIBRBD_IMAGE_REFRESH_REQUEST_H |