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| -rw-r--r-- | src/include/rbd/librbd.hpp | 842 |
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diff --git a/src/include/rbd/librbd.hpp b/src/include/rbd/librbd.hpp new file mode 100644 index 000000000..f1ddc2965 --- /dev/null +++ b/src/include/rbd/librbd.hpp @@ -0,0 +1,842 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab +/* + * Ceph - scalable distributed file system + * + * Copyright (C) 2011 New Dream Network + * + * This is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License version 2.1, as published by the Free Software + * Foundation. See file COPYING. + * + */ + +#ifndef __LIBRBD_HPP +#define __LIBRBD_HPP + +#include <string> +#include <list> +#include <map> +#include <vector> +#include "../rados/buffer.h" +#include "../rados/librados.hpp" +#include "librbd.h" + +#if __GNUC__ >= 4 + #pragma GCC diagnostic push + #pragma GCC diagnostic ignored "-Wdeprecated-declarations" +#endif + +namespace librbd { + + using librados::IoCtx; + + class Image; + class ImageOptions; + class PoolStats; + typedef void *image_ctx_t; + typedef void *completion_t; + typedef void (*callback_t)(completion_t cb, void *arg); + + typedef struct { + std::string id; + std::string name; + } image_spec_t; + + typedef struct { + int64_t pool_id; + std::string pool_name; + std::string pool_namespace; + std::string image_id; + std::string image_name; + bool trash; + } linked_image_spec_t; + + typedef rbd_snap_namespace_type_t snap_namespace_type_t; + + typedef struct { + uint64_t id; + snap_namespace_type_t namespace_type; + std::string name; + } snap_spec_t; + + typedef struct { + uint64_t id; + uint64_t size; + std::string name; + } snap_info_t; + + typedef struct { + int64_t group_pool; + std::string group_name; + std::string group_snap_name; + } snap_group_namespace_t; + + typedef rbd_snap_mirror_state_t snap_mirror_state_t; + + typedef struct { + snap_mirror_state_t state; + std::set<std::string> mirror_peer_uuids; + bool complete; + std::string primary_mirror_uuid; + uint64_t primary_snap_id; + uint64_t last_copied_object_number; + } snap_mirror_namespace_t; + + typedef struct { + std::string client; + std::string cookie; + std::string address; + } locker_t; + + typedef rbd_mirror_peer_direction_t mirror_peer_direction_t; + + typedef struct { + std::string uuid; + std::string cluster_name; + std::string client_name; + } mirror_peer_t CEPH_RBD_DEPRECATED; + + typedef struct { + std::string uuid; + mirror_peer_direction_t direction; + std::string site_name; + std::string mirror_uuid; + std::string client_name; + time_t last_seen; + } mirror_peer_site_t; + + typedef rbd_mirror_image_mode_t mirror_image_mode_t; + typedef rbd_mirror_image_state_t mirror_image_state_t; + + typedef struct { + std::string global_id; + mirror_image_state_t state; + bool primary; + } mirror_image_info_t; + + typedef rbd_mirror_image_status_state_t mirror_image_status_state_t; + + typedef struct { + std::string name; + mirror_image_info_t info; + mirror_image_status_state_t state; + std::string description; + time_t last_update; + bool up; + } mirror_image_status_t CEPH_RBD_DEPRECATED; + + typedef struct { + std::string mirror_uuid; + mirror_image_status_state_t state; + std::string description; + time_t last_update; + bool up; + } mirror_image_site_status_t; + + typedef struct { + std::string name; + mirror_image_info_t info; + std::vector<mirror_image_site_status_t> site_statuses; + } mirror_image_global_status_t; + + typedef rbd_group_image_state_t group_image_state_t; + + typedef struct { + std::string name; + int64_t pool; + group_image_state_t state; + } group_image_info_t; + + typedef struct { + std::string name; + int64_t pool; + } group_info_t; + + typedef rbd_group_snap_state_t group_snap_state_t; + + typedef struct { + std::string name; + group_snap_state_t state; + } group_snap_info_t; + + typedef rbd_image_info_t image_info_t; + + class CEPH_RBD_API ProgressContext + { + public: + virtual ~ProgressContext(); + virtual int update_progress(uint64_t offset, uint64_t total) = 0; + }; + + typedef struct { + std::string id; + std::string name; + rbd_trash_image_source_t source; + time_t deletion_time; + time_t deferment_end_time; + } trash_image_info_t; + + typedef struct { + std::string pool_name; + std::string image_name; + std::string image_id; + bool trash; + } child_info_t; + + typedef struct { + std::string addr; + int64_t id; + uint64_t cookie; + } image_watcher_t; + + typedef rbd_image_migration_state_t image_migration_state_t; + + typedef struct { + int64_t source_pool_id; + std::string source_pool_namespace; + std::string source_image_name; + std::string source_image_id; + int64_t dest_pool_id; + std::string dest_pool_namespace; + std::string dest_image_name; + std::string dest_image_id; + image_migration_state_t state; + std::string state_description; + } image_migration_status_t; + + typedef rbd_config_source_t config_source_t; + + typedef struct { + std::string name; + std::string value; + config_source_t source; + } config_option_t; + + typedef rbd_encryption_format_t encryption_format_t; + typedef rbd_encryption_algorithm_t encryption_algorithm_t; + typedef rbd_encryption_options_t encryption_options_t; + + typedef struct { + encryption_algorithm_t alg; + std::string passphrase; + } encryption_luks1_format_options_t; + + typedef struct { + encryption_algorithm_t alg; + std::string passphrase; + } encryption_luks2_format_options_t; + +class CEPH_RBD_API RBD +{ +public: + RBD(); + ~RBD(); + + // This must be dynamically allocated with new, and + // must be released with release(). + // Do not use delete. + struct AioCompletion { + void *pc; + AioCompletion(void *cb_arg, callback_t complete_cb); + bool is_complete(); + int wait_for_complete(); + ssize_t get_return_value(); + void *get_arg(); + void release(); + }; + + void version(int *major, int *minor, int *extra); + + int open(IoCtx& io_ctx, Image& image, const char *name); + int open(IoCtx& io_ctx, Image& image, const char *name, const char *snapname); + int open_by_id(IoCtx& io_ctx, Image& image, const char *id); + int open_by_id(IoCtx& io_ctx, Image& image, const char *id, const char *snapname); + int aio_open(IoCtx& io_ctx, Image& image, const char *name, + const char *snapname, RBD::AioCompletion *c); + int aio_open_by_id(IoCtx& io_ctx, Image& image, const char *id, + const char *snapname, RBD::AioCompletion *c); + // see librbd.h + int open_read_only(IoCtx& io_ctx, Image& image, const char *name, + const char *snapname); + int open_by_id_read_only(IoCtx& io_ctx, Image& image, const char *id, + const char *snapname); + int aio_open_read_only(IoCtx& io_ctx, Image& image, const char *name, + const char *snapname, RBD::AioCompletion *c); + int aio_open_by_id_read_only(IoCtx& io_ctx, Image& image, const char *id, + const char *snapname, RBD::AioCompletion *c); + int features_to_string(uint64_t features, std::string *str_features); + int features_from_string(const std::string str_features, uint64_t *features); + + int list(IoCtx& io_ctx, std::vector<std::string>& names) + CEPH_RBD_DEPRECATED; + int list2(IoCtx& io_ctx, std::vector<image_spec_t>* images); + + int create(IoCtx& io_ctx, const char *name, uint64_t size, int *order); + int create2(IoCtx& io_ctx, const char *name, uint64_t size, + uint64_t features, int *order); + int create3(IoCtx& io_ctx, const char *name, uint64_t size, + uint64_t features, int *order, + uint64_t stripe_unit, uint64_t stripe_count); + int create4(IoCtx& io_ctx, const char *name, uint64_t size, + ImageOptions& opts); + int clone(IoCtx& p_ioctx, const char *p_name, const char *p_snapname, + IoCtx& c_ioctx, const char *c_name, uint64_t features, + int *c_order); + int clone2(IoCtx& p_ioctx, const char *p_name, const char *p_snapname, + IoCtx& c_ioctx, const char *c_name, uint64_t features, + int *c_order, uint64_t stripe_unit, int stripe_count); + int clone3(IoCtx& p_ioctx, const char *p_name, const char *p_snapname, + IoCtx& c_ioctx, const char *c_name, ImageOptions& opts); + int remove(IoCtx& io_ctx, const char *name); + int remove_with_progress(IoCtx& io_ctx, const char *name, ProgressContext& pctx); + int rename(IoCtx& src_io_ctx, const char *srcname, const char *destname); + + int trash_move(IoCtx &io_ctx, const char *name, uint64_t delay); + int trash_get(IoCtx &io_ctx, const char *id, trash_image_info_t *info); + int trash_list(IoCtx &io_ctx, std::vector<trash_image_info_t> &entries); + int trash_purge(IoCtx &io_ctx, time_t expire_ts, float threshold); + int trash_purge_with_progress(IoCtx &io_ctx, time_t expire_ts, float threshold, + ProgressContext &pctx); + int trash_remove(IoCtx &io_ctx, const char *image_id, bool force); + int trash_remove_with_progress(IoCtx &io_ctx, const char *image_id, + bool force, ProgressContext &pctx); + int trash_restore(IoCtx &io_ctx, const char *id, const char *name); + + // Migration + int migration_prepare(IoCtx& io_ctx, const char *image_name, + IoCtx& dest_io_ctx, const char *dest_image_name, + ImageOptions& opts); + int migration_prepare_import(const char *source_spec, IoCtx& dest_io_ctx, + const char *dest_image_name, ImageOptions& opts); + int migration_execute(IoCtx& io_ctx, const char *image_name); + int migration_execute_with_progress(IoCtx& io_ctx, const char *image_name, + ProgressContext &prog_ctx); + int migration_abort(IoCtx& io_ctx, const char *image_name); + int migration_abort_with_progress(IoCtx& io_ctx, const char *image_name, + ProgressContext &prog_ctx); + int migration_commit(IoCtx& io_ctx, const char *image_name); + int migration_commit_with_progress(IoCtx& io_ctx, const char *image_name, + ProgressContext &prog_ctx); + int migration_status(IoCtx& io_ctx, const char *image_name, + image_migration_status_t *status, size_t status_size); + + // RBD pool mirroring support functions + int mirror_site_name_get(librados::Rados& rados, std::string* site_name); + int mirror_site_name_set(librados::Rados& rados, + const std::string& site_name); + + int mirror_mode_get(IoCtx& io_ctx, rbd_mirror_mode_t *mirror_mode); + int mirror_mode_set(IoCtx& io_ctx, rbd_mirror_mode_t mirror_mode); + + int mirror_uuid_get(IoCtx& io_ctx, std::string* mirror_uuid); + + int mirror_peer_bootstrap_create(IoCtx& io_ctx, std::string* token); + int mirror_peer_bootstrap_import(IoCtx& io_ctx, + mirror_peer_direction_t direction, + const std::string &token); + + int mirror_peer_site_add(IoCtx& io_ctx, std::string *uuid, + mirror_peer_direction_t direction, + const std::string &site_name, + const std::string &client_name); + int mirror_peer_site_set_name(IoCtx& io_ctx, const std::string& uuid, + const std::string &site_name); + int mirror_peer_site_set_client_name(IoCtx& io_ctx, const std::string& uuid, + const std::string &client_name); + int mirror_peer_site_set_direction(IoCtx& io_ctx, const std::string& uuid, + mirror_peer_direction_t direction); + int mirror_peer_site_remove(IoCtx& io_ctx, const std::string& uuid); + int mirror_peer_site_list(IoCtx& io_ctx, + std::vector<mirror_peer_site_t> *peers); + int mirror_peer_site_get_attributes( + IoCtx& io_ctx, const std::string &uuid, + std::map<std::string, std::string> *key_vals); + int mirror_peer_site_set_attributes( + IoCtx& io_ctx, const std::string &uuid, + const std::map<std::string, std::string>& key_vals); + + int mirror_image_global_status_list( + IoCtx& io_ctx, const std::string &start_id, size_t max, + std::map<std::string, mirror_image_global_status_t> *images); + int mirror_image_status_summary(IoCtx& io_ctx, + std::map<mirror_image_status_state_t, int> *states); + int mirror_image_instance_id_list(IoCtx& io_ctx, const std::string &start_id, + size_t max, std::map<std::string, std::string> *sevice_ids); + int mirror_image_info_list(IoCtx& io_ctx, mirror_image_mode_t *mode_filter, + const std::string &start_id, size_t max, + std::map<std::string, std::pair<mirror_image_mode_t, + mirror_image_info_t>> *entries); + + /// mirror_peer_ commands are deprecated to mirror_peer_site_ equivalents + int mirror_peer_add(IoCtx& io_ctx, std::string *uuid, + const std::string &cluster_name, + const std::string &client_name) + CEPH_RBD_DEPRECATED; + int mirror_peer_remove(IoCtx& io_ctx, const std::string &uuid) + CEPH_RBD_DEPRECATED; + int mirror_peer_list(IoCtx& io_ctx, std::vector<mirror_peer_t> *peers) + CEPH_RBD_DEPRECATED; + int mirror_peer_set_client(IoCtx& io_ctx, const std::string &uuid, + const std::string &client_name) + CEPH_RBD_DEPRECATED; + int mirror_peer_set_cluster(IoCtx& io_ctx, const std::string &uuid, + const std::string &cluster_name) + CEPH_RBD_DEPRECATED; + int mirror_peer_get_attributes( + IoCtx& io_ctx, const std::string &uuid, + std::map<std::string, std::string> *key_vals) + CEPH_RBD_DEPRECATED; + int mirror_peer_set_attributes( + IoCtx& io_ctx, const std::string &uuid, + const std::map<std::string, std::string>& key_vals) + CEPH_RBD_DEPRECATED; + + /// mirror_image_status_list command is deprecated to + /// mirror_image_global_status_list + + int mirror_image_status_list( + IoCtx& io_ctx, const std::string &start_id, size_t max, + std::map<std::string, mirror_image_status_t> *images) + CEPH_RBD_DEPRECATED; + + // RBD groups support functions + int group_create(IoCtx& io_ctx, const char *group_name); + int group_remove(IoCtx& io_ctx, const char *group_name); + int group_list(IoCtx& io_ctx, std::vector<std::string> *names); + int group_rename(IoCtx& io_ctx, const char *src_group_name, + const char *dest_group_name); + + int group_image_add(IoCtx& io_ctx, const char *group_name, + IoCtx& image_io_ctx, const char *image_name); + int group_image_remove(IoCtx& io_ctx, const char *group_name, + IoCtx& image_io_ctx, const char *image_name); + int group_image_remove_by_id(IoCtx& io_ctx, const char *group_name, + IoCtx& image_io_ctx, const char *image_id); + int group_image_list(IoCtx& io_ctx, const char *group_name, + std::vector<group_image_info_t> *images, + size_t group_image_info_size); + + int group_snap_create(IoCtx& io_ctx, const char *group_name, + const char *snap_name); + int group_snap_create2(IoCtx& io_ctx, const char *group_name, + const char *snap_name, uint32_t flags); + int group_snap_remove(IoCtx& io_ctx, const char *group_name, + const char *snap_name); + int group_snap_rename(IoCtx& group_ioctx, const char *group_name, + const char *old_snap_name, const char *new_snap_name); + int group_snap_list(IoCtx& group_ioctx, const char *group_name, + std::vector<group_snap_info_t> *snaps, + size_t group_snap_info_size); + int group_snap_rollback(IoCtx& io_ctx, const char *group_name, + const char *snap_name); + int group_snap_rollback_with_progress(IoCtx& io_ctx, const char *group_name, + const char *snap_name, + ProgressContext& pctx); + + int namespace_create(IoCtx& ioctx, const char *namespace_name); + int namespace_remove(IoCtx& ioctx, const char *namespace_name); + int namespace_list(IoCtx& io_ctx, std::vector<std::string>* namespace_names); + int namespace_exists(IoCtx& io_ctx, const char *namespace_name, bool *exists); + + int pool_init(IoCtx& io_ctx, bool force); + int pool_stats_get(IoCtx& io_ctx, PoolStats *pool_stats); + + int pool_metadata_get(IoCtx &io_ctx, const std::string &key, + std::string *value); + int pool_metadata_set(IoCtx &io_ctx, const std::string &key, + const std::string &value); + int pool_metadata_remove(IoCtx &io_ctx, const std::string &key); + int pool_metadata_list(IoCtx &io_ctx, const std::string &start, uint64_t max, + std::map<std::string, ceph::bufferlist> *pairs); + + int config_list(IoCtx& io_ctx, std::vector<config_option_t> *options); + +private: + /* We don't allow assignment or copying */ + RBD(const RBD& rhs); + const RBD& operator=(const RBD& rhs); +}; + +class CEPH_RBD_API ImageOptions { +public: + ImageOptions(); + ImageOptions(rbd_image_options_t opts); + ImageOptions(const ImageOptions &imgopts); + ~ImageOptions(); + + int set(int optname, const std::string& optval); + int set(int optname, uint64_t optval); + int get(int optname, std::string* optval) const; + int get(int optname, uint64_t* optval) const; + int is_set(int optname, bool* is_set); + int unset(int optname); + void clear(); + bool empty() const; + +private: + friend class RBD; + friend class Image; + + rbd_image_options_t opts; +}; + +class CEPH_RBD_API PoolStats { +public: + PoolStats(); + ~PoolStats(); + + PoolStats(const PoolStats&) = delete; + PoolStats& operator=(const PoolStats&) = delete; + + int add(rbd_pool_stat_option_t option, uint64_t* opt_val); + +private: + friend class RBD; + + rbd_pool_stats_t pool_stats; +}; + +class CEPH_RBD_API UpdateWatchCtx { +public: + virtual ~UpdateWatchCtx() {} + /** + * Callback activated when we receive a notify event. + */ + virtual void handle_notify() = 0; +}; + +class CEPH_RBD_API QuiesceWatchCtx { +public: + virtual ~QuiesceWatchCtx() {} + /** + * Callback activated when we want to quiesce. + */ + virtual void handle_quiesce() = 0; + + /** + * Callback activated when we want to unquiesce. + */ + virtual void handle_unquiesce() = 0; +}; + +class CEPH_RBD_API Image +{ +public: + Image(); + ~Image(); + + int close(); + int aio_close(RBD::AioCompletion *c); + + int resize(uint64_t size); + int resize2(uint64_t size, bool allow_shrink, ProgressContext& pctx); + int resize_with_progress(uint64_t size, ProgressContext& pctx); + int stat(image_info_t &info, size_t infosize); + int get_name(std::string *name); + int get_id(std::string *id); + std::string get_block_name_prefix(); + int64_t get_data_pool_id(); + int parent_info(std::string *parent_poolname, std::string *parent_name, + std::string *parent_snapname) + CEPH_RBD_DEPRECATED; + int parent_info2(std::string *parent_poolname, std::string *parent_name, + std::string *parent_id, std::string *parent_snapname) + CEPH_RBD_DEPRECATED; + int get_parent(linked_image_spec_t *parent_image, snap_spec_t *parent_snap); + + int get_migration_source_spec(std::string* source_spec); + + int old_format(uint8_t *old); + int size(uint64_t *size); + int get_group(group_info_t *group_info, size_t group_info_size); + int features(uint64_t *features); + int update_features(uint64_t features, bool enabled); + int get_op_features(uint64_t *op_features); + int overlap(uint64_t *overlap); + int get_flags(uint64_t *flags); + int set_image_notification(int fd, int type); + + /* exclusive lock feature */ + int is_exclusive_lock_owner(bool *is_owner); + int lock_acquire(rbd_lock_mode_t lock_mode); + int lock_release(); + int lock_get_owners(rbd_lock_mode_t *lock_mode, + std::list<std::string> *lock_owners); + int lock_break(rbd_lock_mode_t lock_mode, const std::string &lock_owner); + + /* object map feature */ + int rebuild_object_map(ProgressContext &prog_ctx); + + int check_object_map(ProgressContext &prog_ctx); + + int copy(IoCtx& dest_io_ctx, const char *destname); + int copy2(Image& dest); + int copy3(IoCtx& dest_io_ctx, const char *destname, ImageOptions& opts); + int copy4(IoCtx& dest_io_ctx, const char *destname, ImageOptions& opts, + size_t sparse_size); + int copy_with_progress(IoCtx& dest_io_ctx, const char *destname, + ProgressContext &prog_ctx); + int copy_with_progress2(Image& dest, ProgressContext &prog_ctx); + int copy_with_progress3(IoCtx& dest_io_ctx, const char *destname, + ImageOptions& opts, ProgressContext &prog_ctx); + int copy_with_progress4(IoCtx& dest_io_ctx, const char *destname, + ImageOptions& opts, ProgressContext &prog_ctx, + size_t sparse_size); + + /* deep copy */ + int deep_copy(IoCtx& dest_io_ctx, const char *destname, ImageOptions& opts); + int deep_copy_with_progress(IoCtx& dest_io_ctx, const char *destname, + ImageOptions& opts, ProgressContext &prog_ctx); + + /* encryption */ + int encryption_format(encryption_format_t format, encryption_options_t opts, + size_t opts_size); + int encryption_load(encryption_format_t format, encryption_options_t opts, + size_t opts_size); + + /* striping */ + uint64_t get_stripe_unit() const; + uint64_t get_stripe_count() const; + + int get_create_timestamp(struct timespec *timestamp); + int get_access_timestamp(struct timespec *timestamp); + int get_modify_timestamp(struct timespec *timestamp); + + int flatten(); + int flatten_with_progress(ProgressContext &prog_ctx); + + int sparsify(size_t sparse_size); + int sparsify_with_progress(size_t sparse_size, ProgressContext &prog_ctx); + /** + * Returns a pair of poolname, imagename for each clone + * of this image at the currently set snapshot. + */ + int list_children(std::set<std::pair<std::string, std::string> > *children) + CEPH_RBD_DEPRECATED; + /** + * Returns a structure of poolname, imagename, imageid and trash flag + * for each clone of this image at the currently set snapshot. + */ + int list_children2(std::vector<librbd::child_info_t> *children) + CEPH_RBD_DEPRECATED; + int list_children3(std::vector<linked_image_spec_t> *images); + int list_descendants(std::vector<linked_image_spec_t> *images); + + /* advisory locking (see librbd.h for details) */ + int list_lockers(std::list<locker_t> *lockers, + bool *exclusive, std::string *tag); + int lock_exclusive(const std::string& cookie); + int lock_shared(const std::string& cookie, const std::string& tag); + int unlock(const std::string& cookie); + int break_lock(const std::string& client, const std::string& cookie); + + /* snapshots */ + int snap_list(std::vector<snap_info_t>& snaps); + /* DEPRECATED; use snap_exists2 */ + bool snap_exists(const char *snapname) CEPH_RBD_DEPRECATED; + int snap_exists2(const char *snapname, bool *exists); + int snap_create(const char *snapname); + int snap_create2(const char *snapname, uint32_t flags, ProgressContext& pctx); + int snap_remove(const char *snapname); + int snap_remove2(const char *snapname, uint32_t flags, ProgressContext& pctx); + int snap_remove_by_id(uint64_t snap_id); + int snap_rollback(const char *snap_name); + int snap_rollback_with_progress(const char *snap_name, ProgressContext& pctx); + int snap_protect(const char *snap_name); + int snap_unprotect(const char *snap_name); + int snap_is_protected(const char *snap_name, bool *is_protected); + int snap_set(const char *snap_name); + int snap_set_by_id(uint64_t snap_id); + int snap_get_name(uint64_t snap_id, std::string *snap_name); + int snap_get_id(const std::string snap_name, uint64_t *snap_id); + int snap_rename(const char *srcname, const char *dstname); + int snap_get_limit(uint64_t *limit); + int snap_set_limit(uint64_t limit); + int snap_get_timestamp(uint64_t snap_id, struct timespec *timestamp); + int snap_get_namespace_type(uint64_t snap_id, + snap_namespace_type_t *namespace_type); + int snap_get_group_namespace(uint64_t snap_id, + snap_group_namespace_t *group_namespace, + size_t snap_group_namespace_size); + int snap_get_trash_namespace(uint64_t snap_id, std::string* original_name); + int snap_get_mirror_namespace( + uint64_t snap_id, snap_mirror_namespace_t *mirror_namespace, + size_t snap_mirror_namespace_size); + + /* I/O */ + ssize_t read(uint64_t ofs, size_t len, ceph::bufferlist& bl); + /* @param op_flags see librados.h constants beginning with LIBRADOS_OP_FLAG */ + ssize_t read2(uint64_t ofs, size_t len, ceph::bufferlist& bl, int op_flags); + int64_t read_iterate(uint64_t ofs, size_t len, + int (*cb)(uint64_t, size_t, const char *, void *), void *arg); + int read_iterate2(uint64_t ofs, uint64_t len, + int (*cb)(uint64_t, size_t, const char *, void *), void *arg); + /** + * get difference between two versions of an image + * + * This will return the differences between two versions of an image + * via a callback, which gets the offset and length and a flag + * indicating whether the extent exists (1), or is known/defined to + * be zeros (a hole, 0). If the source snapshot name is NULL, we + * interpret that as the beginning of time and return all allocated + * regions of the image. The end version is whatever is currently + * selected for the image handle (either a snapshot or the writeable + * head). + * + * @param fromsnapname start snapshot name, or NULL + * @param ofs start offset + * @param len len in bytes of region to report on + * @param include_parent true if full history diff should include parent + * @param whole_object 1 if diff extents should cover whole object + * @param cb callback to call for each allocated region + * @param arg argument to pass to the callback + * @returns 0 on success, or negative error code on error + */ + int diff_iterate(const char *fromsnapname, + uint64_t ofs, uint64_t len, + int (*cb)(uint64_t, size_t, int, void *), void *arg); + int diff_iterate2(const char *fromsnapname, + uint64_t ofs, uint64_t len, + bool include_parent, bool whole_object, + int (*cb)(uint64_t, size_t, int, void *), void *arg); + + ssize_t write(uint64_t ofs, size_t len, ceph::bufferlist& bl); + /* @param op_flags see librados.h constants beginning with LIBRADOS_OP_FLAG */ + ssize_t write2(uint64_t ofs, size_t len, ceph::bufferlist& bl, int op_flags); + + int discard(uint64_t ofs, uint64_t len); + ssize_t writesame(uint64_t ofs, size_t len, ceph::bufferlist &bl, int op_flags); + ssize_t write_zeroes(uint64_t ofs, size_t len, int zero_flags, int op_flags); + + ssize_t compare_and_write(uint64_t ofs, size_t len, ceph::bufferlist &cmp_bl, + ceph::bufferlist& bl, uint64_t *mismatch_off, int op_flags); + + int aio_write(uint64_t off, size_t len, ceph::bufferlist& bl, RBD::AioCompletion *c); + /* @param op_flags see librados.h constants beginning with LIBRADOS_OP_FLAG */ + int aio_write2(uint64_t off, size_t len, ceph::bufferlist& bl, + RBD::AioCompletion *c, int op_flags); + + int aio_discard(uint64_t off, uint64_t len, RBD::AioCompletion *c); + int aio_writesame(uint64_t off, size_t len, ceph::bufferlist& bl, + RBD::AioCompletion *c, int op_flags); + int aio_write_zeroes(uint64_t ofs, size_t len, RBD::AioCompletion *c, + int zero_flags, int op_flags); + + int aio_compare_and_write(uint64_t off, size_t len, ceph::bufferlist& cmp_bl, + ceph::bufferlist& bl, RBD::AioCompletion *c, + uint64_t *mismatch_off, int op_flags); + + /** + * read async from image + * + * The target bufferlist is populated with references to buffers + * that contain the data for the given extent of the image. + * + * NOTE: If caching is enabled, the bufferlist will directly + * reference buffers in the cache to avoid an unnecessary data copy. + * As a result, if the user intends to modify the buffer contents + * directly, they should make a copy first (unconditionally, or when + * the reference count on ther underlying buffer is more than 1). + * + * @param off offset in image + * @param len length of read + * @param bl bufferlist to read into + * @param c aio completion to notify when read is complete + */ + int aio_read(uint64_t off, size_t len, ceph::bufferlist& bl, RBD::AioCompletion *c); + /* @param op_flags see librados.h constants beginning with LIBRADOS_OP_FLAG */ + int aio_read2(uint64_t off, size_t len, ceph::bufferlist& bl, + RBD::AioCompletion *c, int op_flags); + + int flush(); + /** + * Start a flush if caching is enabled. Get a callback when + * the currently pending writes are on disk. + * + * @param image the image to flush writes to + * @param c what to call when flushing is complete + * @returns 0 on success, negative error code on failure + */ + int aio_flush(RBD::AioCompletion *c); + + /** + * Drop any cached data for this image + * + * @returns 0 on success, negative error code on failure + */ + int invalidate_cache(); + + int poll_io_events(RBD::AioCompletion **comps, int numcomp); + + int metadata_get(const std::string &key, std::string *value); + int metadata_set(const std::string &key, const std::string &value); + int metadata_remove(const std::string &key); + /** + * Returns a pair of key/value for this image + */ + int metadata_list(const std::string &start, uint64_t max, std::map<std::string, ceph::bufferlist> *pairs); + + // RBD image mirroring support functions + int mirror_image_enable() CEPH_RBD_DEPRECATED; + int mirror_image_enable2(mirror_image_mode_t mode); + int mirror_image_disable(bool force); + int mirror_image_promote(bool force); + int mirror_image_demote(); + int mirror_image_resync(); + int mirror_image_create_snapshot(uint64_t *snap_id); + int mirror_image_create_snapshot2(uint32_t flags, uint64_t *snap_id); + int mirror_image_get_info(mirror_image_info_t *mirror_image_info, + size_t info_size); + int mirror_image_get_mode(mirror_image_mode_t *mode); + int mirror_image_get_global_status( + mirror_image_global_status_t *mirror_image_global_status, + size_t status_size); + int mirror_image_get_status( + mirror_image_status_t *mirror_image_status, size_t status_size) + CEPH_RBD_DEPRECATED; + int mirror_image_get_instance_id(std::string *instance_id); + int aio_mirror_image_promote(bool force, RBD::AioCompletion *c); + int aio_mirror_image_demote(RBD::AioCompletion *c); + int aio_mirror_image_get_info(mirror_image_info_t *mirror_image_info, + size_t info_size, RBD::AioCompletion *c); + int aio_mirror_image_get_mode(mirror_image_mode_t *mode, + RBD::AioCompletion *c); + int aio_mirror_image_get_global_status( + mirror_image_global_status_t *mirror_image_global_status, + size_t status_size, RBD::AioCompletion *c); + int aio_mirror_image_get_status( + mirror_image_status_t *mirror_image_status, size_t status_size, + RBD::AioCompletion *c) + CEPH_RBD_DEPRECATED; + int aio_mirror_image_create_snapshot(uint32_t flags, uint64_t *snap_id, + RBD::AioCompletion *c); + + int update_watch(UpdateWatchCtx *ctx, uint64_t *handle); + int update_unwatch(uint64_t handle); + + int list_watchers(std::list<image_watcher_t> &watchers); + + int config_list(std::vector<config_option_t> *options); + + int quiesce_watch(QuiesceWatchCtx *ctx, uint64_t *handle); + int quiesce_unwatch(uint64_t handle); + void quiesce_complete(uint64_t handle, int r); + +private: + friend class RBD; + + Image(const Image& rhs); + const Image& operator=(const Image& rhs); + + image_ctx_t ctx; +}; + +} // namespace librbd + +#if __GNUC__ >= 4 + #pragma GCC diagnostic pop +#endif + +#endif // __LIBRBD_HPP |