File Instrumentation (ABI)

Classes
struct	PSI_file_info_v1
	File instrument information. More...
struct	PSI_file_locker_state_v1
	State data storage for get_thread_file_name_locker_v1_t. More...
struct	PSI_file_bootstrap
	Entry point for the performance schema interface. More...
struct	PSI_file_service_v1
	Performance Schema file Interface, version 1. More...

Macros
#define	PSI_FILE_VERSION_1   1
	Performance Schema File Interface number for version 1. More...
#define	PSI_CURRENT_FILE_VERSION   1
	Performance Schema File Interface number for the most recent version. More...

Typedefs
typedef unsigned int	PSI_file_key
	Instrumented file key. More...
typedef struct PSI_file	PSI_file
typedef struct PSI_file_locker	PSI_file_locker
typedef enum PSI_file_operation	PSI_file_operation
typedef struct PSI_file_info_v1	PSI_file_info_v1
typedef struct PSI_file_locker_state_v1	PSI_file_locker_state_v1
typedef void(*	register_file_v1_t) (const char *category, struct PSI_file_info_v1 *info, int count)
	File registration API. More...
typedef void(*	create_file_v1_t) (PSI_file_key key, const char *name, File file)
	Create a file instrumentation for a created file. More...
typedef struct PSI_file_locker *(*	get_thread_file_name_locker_v1_t) (struct PSI_file_locker_state_v1 *state, PSI_file_key key, enum PSI_file_operation op, const char *name, const void *identity)
	Get a file instrumentation locker, for opening or creating a file. More...
typedef struct PSI_file_locker *(*	get_thread_file_stream_locker_v1_t) (struct PSI_file_locker_state_v1 *state, struct PSI_file *file, enum PSI_file_operation op)
	Get a file stream instrumentation locker. More...
typedef struct PSI_file_locker *(*	get_thread_file_descriptor_locker_v1_t) (struct PSI_file_locker_state_v1 *state, File file, enum PSI_file_operation op)
	Get a file instrumentation locker. More...
typedef void(*	start_file_open_wait_v1_t) (struct PSI_file_locker *locker, const char *src_file, unsigned int src_line)
	Start a file instrumentation open operation. More...
typedef struct PSI_file *(*	end_file_open_wait_v1_t) (struct PSI_file_locker *locker, void *result)
	End a file instrumentation open operation, for file streams. More...
typedef void(*	end_file_open_wait_and_bind_to_descriptor_v1_t) (struct PSI_file_locker *locker, File file)
	End a file instrumentation open operation, for non stream files. More...
typedef void(*	end_temp_file_open_wait_and_bind_to_descriptor_v1_t) (struct PSI_file_locker *locker, File file, const char *filename)
	End a file instrumentation open operation, for non stream temporary files. More...
typedef void(*	start_file_wait_v1_t) (struct PSI_file_locker *locker, size_t count, const char *src_file, unsigned int src_line)
	Record a file instrumentation start event. More...
typedef void(*	end_file_wait_v1_t) (struct PSI_file_locker *locker, size_t count)
	Record a file instrumentation end event. More...
typedef void(*	start_file_close_wait_v1_t) (struct PSI_file_locker *locker, const char *src_file, unsigned int src_line)
	Start a file instrumentation close operation. More...
typedef void(*	end_file_close_wait_v1_t) (struct PSI_file_locker *locker, int rc)
	End a file instrumentation close operation. More...
typedef void(*	end_file_rename_wait_v1_t) (struct PSI_file_locker *locker, const char *old_name, const char *new_name, int rc)
	Rename a file instrumentation close operation. More...
typedef struct PSI_file_info_v1	PSI_file_info
typedef struct PSI_file_locker_state_v1	PSI_file_locker_state
typedef struct PSI_file_service_v1	PSI_file_service_t

Enumerations
enum	PSI_file_operation {   PSI_FILE_CREATE = 0, PSI_FILE_CREATE_TMP = 1, PSI_FILE_OPEN = 2, PSI_FILE_STREAM_OPEN = 3,   PSI_FILE_CLOSE = 4, PSI_FILE_STREAM_CLOSE = 5, PSI_FILE_READ = 6, PSI_FILE_WRITE = 7,   PSI_FILE_SEEK = 8, PSI_FILE_TELL = 9, PSI_FILE_FLUSH = 10, PSI_FILE_STAT = 11,   PSI_FILE_FSTAT = 12, PSI_FILE_CHSIZE = 13, PSI_FILE_DELETE = 14, PSI_FILE_RENAME = 15,   PSI_FILE_SYNC = 16 }
	Operation performed on an instrumented file. More...

Variables
MYSQL_PLUGIN_IMPORT PSI_file_service_t *	psi_file_service

Detailed Description

Macro Definition Documentation

PSI_CURRENT_FILE_VERSION

#define PSI_CURRENT_FILE_VERSION   1

Performance Schema File Interface number for the most recent version.

The most current version is PSI_FILE_VERSION_1

PSI_FILE_VERSION_1

#define PSI_FILE_VERSION_1   1

Performance Schema File Interface number for version 1.

This version is supported.

Typedef Documentation

create_file_v1_t

typedef void(* create_file_v1_t) (PSI_file_key key, const char *name, File file)

Create a file instrumentation for a created file.

This method does not create the file itself, but is used to notify the instrumentation interface that a file was just created.

Parameters

key	the file instrumentation key for this file
name	the file name
file	the file handle

end_file_close_wait_v1_t

typedef void(* end_file_close_wait_v1_t) (struct PSI_file_locker *locker, int rc)

End a file instrumentation close operation.

Parameters

locker	the file locker.
rc	the close operation return code (0 for success).

end_file_open_wait_and_bind_to_descriptor_v1_t

typedef void(* end_file_open_wait_and_bind_to_descriptor_v1_t) (struct PSI_file_locker *locker, File file)

End a file instrumentation open operation, for non stream files.

Parameters

locker	the file locker.
file	the file number assigned by open() or create() for this file.

end_file_open_wait_v1_t

typedef struct PSI_file*(* end_file_open_wait_v1_t) (struct PSI_file_locker *locker, void *result)

End a file instrumentation open operation, for file streams.

Parameters

locker	the file locker.
result	the opened file (NULL indicates failure, non NULL success).

Returns

an instrumented file handle

end_file_rename_wait_v1_t

typedef void(* end_file_rename_wait_v1_t) (struct PSI_file_locker *locker, const char *old_name, const char *new_name, int rc)

Rename a file instrumentation close operation.

Parameters

locker	the file locker.
old_name	name of the file to be renamed.
new_name	name of the file after rename.
rc	the rename operation return code (0 for success).

end_file_wait_v1_t

typedef void(* end_file_wait_v1_t) (struct PSI_file_locker *locker, size_t count)

Record a file instrumentation end event.

Note that for file close operations, the instrumented file handle associated with the file (which was provided to obtain a locker) is invalid after this call.

Parameters

locker	a file locker for the running thread
count	the number of bytes actually used in the operation, or 0 if not applicable, or -1 if the operation failed

See also

get_thread_file_name_locker

get_thread_file_stream_locker

get_thread_file_descriptor_locker

end_temp_file_open_wait_and_bind_to_descriptor_v1_t

typedef void(* end_temp_file_open_wait_and_bind_to_descriptor_v1_t) (struct PSI_file_locker *locker, File file, const char *filename)

End a file instrumentation open operation, for non stream temporary files.

Parameters

locker	the file locker.
file	the file number assigned by open() or create() for this file.
filename	the file name generated during temporary file creation.

get_thread_file_descriptor_locker_v1_t

typedef struct PSI_file_locker*(* get_thread_file_descriptor_locker_v1_t) (struct PSI_file_locker_state_v1 *state, File file, enum PSI_file_operation op)

Get a file instrumentation locker.

Parameters

state	data storage for the locker
file	the file descriptor to access
op	the operation to perform

Returns

a file locker, or NULL

get_thread_file_name_locker_v1_t

typedef struct PSI_file_locker*(* get_thread_file_name_locker_v1_t) (struct PSI_file_locker_state_v1 *state, PSI_file_key key, enum PSI_file_operation op, const char *name, const void *identity)

Get a file instrumentation locker, for opening or creating a file.

Parameters

state	data storage for the locker
key	the file instrumentation key
op	the operation to perform
name	the file name
identity	a pointer representative of this file.

Returns

a file locker, or NULL

get_thread_file_stream_locker_v1_t

typedef struct PSI_file_locker*(* get_thread_file_stream_locker_v1_t) (struct PSI_file_locker_state_v1 *state, struct PSI_file *file, enum PSI_file_operation op)

Get a file stream instrumentation locker.

Parameters

state	data storage for the locker
file	the file stream to access
op	the operation to perform

Returns

a file locker, or NULL

PSI_file

typedef struct PSI_file PSI_file

PSI_file_info

typedef struct PSI_file_info_v1 PSI_file_info

PSI_file_info_v1

typedef struct PSI_file_info_v1 PSI_file_info_v1

PSI_file_key

typedef unsigned int PSI_file_key

Instrumented file key.

To instrument a file, a file key must be obtained using register_file. Using a zero key always disable the instrumentation.

PSI_file_locker

typedef struct PSI_file_locker PSI_file_locker

PSI_file_locker_state

typedef struct PSI_file_locker_state_v1 PSI_file_locker_state

PSI_file_locker_state_v1

typedef struct PSI_file_locker_state_v1 PSI_file_locker_state_v1

PSI_file_operation

typedef enum PSI_file_operation PSI_file_operation

PSI_file_service_t

typedef struct PSI_file_service_v1 PSI_file_service_t

register_file_v1_t

typedef void(* register_file_v1_t) (const char *category, struct PSI_file_info_v1 *info, int count)

File registration API.

Parameters

category	a category name (typically a plugin name)
info	an array of file info to register
count	the size of the info array

start_file_close_wait_v1_t

typedef void(* start_file_close_wait_v1_t) (struct PSI_file_locker *locker, const char *src_file, unsigned int src_line)

Start a file instrumentation close operation.

Parameters

locker	the file locker
src_file	the source file name
src_line	the source line number

start_file_open_wait_v1_t

typedef void(* start_file_open_wait_v1_t) (struct PSI_file_locker *locker, const char *src_file, unsigned int src_line)

Start a file instrumentation open operation.

Parameters

locker	the file locker
src_file	the source file name
src_line	the source line number

start_file_wait_v1_t

typedef void(* start_file_wait_v1_t) (struct PSI_file_locker *locker, size_t count, const char *src_file, unsigned int src_line)

Record a file instrumentation start event.

Parameters

locker	a file locker for the running thread
count	the number of bytes requested, or 0 if not applicable
src_file	the source file name
src_line	the source line number

Enumeration Type Documentation

PSI_file_operation

enum PSI_file_operation

Operation performed on an instrumented file.

Enumerator
PSI_FILE_CREATE	File creation, as in create().
PSI_FILE_CREATE_TMP	Temporary file creation, as in create_temp_file().
PSI_FILE_OPEN	File open, as in open().
PSI_FILE_STREAM_OPEN	File open, as in fopen().
PSI_FILE_CLOSE	File close, as in close().
PSI_FILE_STREAM_CLOSE	File close, as in fclose().
PSI_FILE_READ	Generic file read, such as fgets(), fgetc(), fread(), read(), pread().
PSI_FILE_WRITE	Generic file write, such as fputs(), fputc(), fprintf(), vfprintf(), fwrite(), write(), pwrite().
PSI_FILE_SEEK	Generic file seek, such as fseek() or seek().
PSI_FILE_TELL	Generic file tell, such as ftell() or tell().
PSI_FILE_FLUSH	File flush, as in fflush().
PSI_FILE_STAT	File stat, as in stat().
PSI_FILE_FSTAT	File stat, as in fstat().
PSI_FILE_CHSIZE	File chsize, as in my_chsize().
PSI_FILE_DELETE	File delete, such as my_delete() or my_delete_with_symlink().
PSI_FILE_RENAME	File rename, such as my_rename() or my_rename_with_symlink().
PSI_FILE_SYNC	File sync, as in fsync() or my_sync().

Variable Documentation

psi_file_service

MYSQL_PLUGIN_IMPORT PSI_file_service_t* psi_file_service