+++ /dev/null
-/*
- * Copyright (C) 2019 Jérémie Galarneau <jeremie.galarneau@efficios.com>
- *
- * SPDX-License-Identifier: LGPL-2.1-only
- *
- */
-
-#ifndef LTTNG_TRACE_CHUNK_H
-#define LTTNG_TRACE_CHUNK_H
-
-#include <common/compat/directory-handle.h>
-#include <common/credentials.h>
-#include <common/fd-tracker/fd-tracker.h>
-#include <common/macros.h>
-#include <stdbool.h>
-#include <stddef.h>
-#include <stdint.h>
-
-/*
- * A trace chunk is a group of directories and files forming a (or a set of)
- * complete and independant trace(s). For instance, a trace archive chunk,
- * a snapshot, or a regular LTTng trace are all instances of a trace archive.
- *
- * A trace chunk is always contained within a session output directory.
- *
- * This facility is used by the session daemon, consumer daemon(s), and relay
- * daemon to:
- * - Control file (data stream, metadata, and index) creation relative to
- * a given output directory,
- * - Track the use of an output directory by other objects in order to
- * know if/when an output directory can be safely consumed, renamed,
- * deleted, etc.
- *
- *
- * OWNER VS USER
- * ---
- *
- * A trace chunk can either be a owner or a user of its
- * "chunk output directory".
- *
- * A "user" trace chunk is provided with a handle to the chunk output directory
- * which can then be used to create subdirectories and files.
- *
- * An "owner" chunk, on top of being able to perform the operations of a "user"
- * chunk can perform operations on its chunk output directory, such as renaming
- * or deleting it.
- *
- * A trace chunk becomes an "owner" or "user" chunk based on which of
- * 'lttng_trace_chunk_set_as_owner()' or 'lttng_trace_chunk_set_as_user()' is
- * used. These methods are _exclusive_ and must only be used once on a
- * trace chunk.
- */
-
-struct lttng_trace_chunk;
-struct fd_tracker;
-
-enum lttng_trace_chunk_status {
- LTTNG_TRACE_CHUNK_STATUS_OK,
- LTTNG_TRACE_CHUNK_STATUS_NONE,
- LTTNG_TRACE_CHUNK_STATUS_INVALID_ARGUMENT,
- LTTNG_TRACE_CHUNK_STATUS_INVALID_OPERATION,
- LTTNG_TRACE_CHUNK_STATUS_ERROR,
- LTTNG_TRACE_CHUNK_STATUS_NO_FILE,
-};
-
-enum lttng_trace_chunk_command_type {
- LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED = 0,
- LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION = 1,
- LTTNG_TRACE_CHUNK_COMMAND_TYPE_DELETE = 2,
- LTTNG_TRACE_CHUNK_COMMAND_TYPE_MAX,
-};
-
-struct lttng_trace_chunk *lttng_trace_chunk_create_anonymous(void);
-
-struct lttng_trace_chunk *lttng_trace_chunk_create(
- uint64_t chunk_id,
- time_t chunk_creation_time,
- const char *path);
-
-void lttng_trace_chunk_set_fd_tracker(struct lttng_trace_chunk *chunk,
- struct fd_tracker *fd_tracker);
-
-/*
- * Copy a trace chunk. The copy that is returned is always a _user_
- * mode chunk even if the source chunk was an _owner_ as there can never be
- * two _owners_ of the same trace output.
- */
-struct lttng_trace_chunk *lttng_trace_chunk_copy(
- struct lttng_trace_chunk *source_chunk);
-
-enum lttng_trace_chunk_status lttng_trace_chunk_get_id(
- struct lttng_trace_chunk *chunk, uint64_t *id);
-
-enum lttng_trace_chunk_status lttng_trace_chunk_get_creation_timestamp(
- struct lttng_trace_chunk *chunk, time_t *creation_ts);
-
-enum lttng_trace_chunk_status lttng_trace_chunk_get_close_timestamp(
- struct lttng_trace_chunk *chunk, time_t *close_ts);
-
-enum lttng_trace_chunk_status lttng_trace_chunk_set_close_timestamp(
- struct lttng_trace_chunk *chunk, time_t close_ts);
-
-enum lttng_trace_chunk_status lttng_trace_chunk_get_name(
- struct lttng_trace_chunk *chunk, const char **name,
- bool *name_overridden);
-
-bool lttng_trace_chunk_get_name_overridden(struct lttng_trace_chunk *chunk);
-
-enum lttng_trace_chunk_status lttng_trace_chunk_override_name(
- struct lttng_trace_chunk *chunk, const char *name);
-
-enum lttng_trace_chunk_status lttng_trace_chunk_rename_path(
- struct lttng_trace_chunk *chunk, const char *path);
-
-enum lttng_trace_chunk_status lttng_trace_chunk_get_credentials(
- struct lttng_trace_chunk *chunk,
- struct lttng_credentials *credentials);
-
-enum lttng_trace_chunk_status lttng_trace_chunk_set_credentials(
- struct lttng_trace_chunk *chunk,
- const struct lttng_credentials *credentials);
-
-enum lttng_trace_chunk_status lttng_trace_chunk_set_credentials_current_user(
- struct lttng_trace_chunk *chunk);
-
-enum lttng_trace_chunk_status lttng_trace_chunk_set_as_owner(
- struct lttng_trace_chunk *chunk,
- struct lttng_directory_handle *session_output_directory);
-
-enum lttng_trace_chunk_status lttng_trace_chunk_set_as_user(
- struct lttng_trace_chunk *chunk,
- struct lttng_directory_handle *chunk_directory);
-
-enum lttng_trace_chunk_status
-lttng_trace_chunk_get_session_output_directory_handle(
- struct lttng_trace_chunk *chunk,
- struct lttng_directory_handle **handle);
-
-enum lttng_trace_chunk_status lttng_trace_chunk_borrow_chunk_directory_handle(
- struct lttng_trace_chunk *chunk,
- const struct lttng_directory_handle **handle);
-
-enum lttng_trace_chunk_status lttng_trace_chunk_create_subdirectory(
- struct lttng_trace_chunk *chunk,
- const char *subdirectory_path);
-
-enum lttng_trace_chunk_status lttng_trace_chunk_open_file(
- struct lttng_trace_chunk *chunk,
- const char *filename,
- int flags,
- mode_t mode,
- int *out_fd,
- bool expect_no_file);
-
-enum lttng_trace_chunk_status lttng_trace_chunk_open_fs_handle(
- struct lttng_trace_chunk *chunk,
- const char *filename,
- int flags,
- mode_t mode,
- struct fs_handle **out_handle,
- bool expect_no_file);
-
-int lttng_trace_chunk_unlink_file(struct lttng_trace_chunk *chunk,
- const char *filename);
-
-enum lttng_trace_chunk_status lttng_trace_chunk_get_close_command(
- struct lttng_trace_chunk *chunk,
- enum lttng_trace_chunk_command_type *command_type);
-
-enum lttng_trace_chunk_status lttng_trace_chunk_set_close_command(
- struct lttng_trace_chunk *chunk,
- enum lttng_trace_chunk_command_type command_type);
-
-const char *lttng_trace_chunk_command_type_get_name(
- enum lttng_trace_chunk_command_type command);
-
-bool lttng_trace_chunk_ids_equal(const struct lttng_trace_chunk *chunk_a,
- const struct lttng_trace_chunk *chunk_b);
-
-/* Returns true on success. */
-bool lttng_trace_chunk_get(struct lttng_trace_chunk *chunk);
-
-void lttng_trace_chunk_put(struct lttng_trace_chunk *chunk);
-
-#endif /* LTTNG_TRACE_CHUNK_H */
projects / lttng-tools.git / blobdiff