File system node handler. More...

Files
file	default_fcntl.c
	RTEMS Default Filesystem - Default FCNTL.

file	default_freenode.c
	RTEMS Default Filesystem - Default Freenode.

file	default_ftruncate_directory.c
	RTEMS Default Filesystem - Default Ftruncate Directory.

file	default_kqfilter.c
	Default Kernel Event Filter Handler.

file	default_mmap.c
	Default MMAP Handler.

file	default_open.c
	RTEMS Default Filesystem - Default Open.

file	default_poll.c
	Default Poll Handler.

file	default_readv.c
	Default Read IO Vector Handler.

file	default_writev.c
	Default Read IO Vector Handler.

Data Structures
struct	_rtems_filesystem_file_handlers_r
	File system node operations table. More...

Typedefs
typedef int(*	rtems_filesystem_open_t) (rtems_libio_t iop, const char path, int oflag, mode_t mode)
	Opens a node.

typedef int(*	rtems_filesystem_close_t) (rtems_libio_t *iop)
	Closes a node.

typedef ssize_t(*	rtems_filesystem_read_t) (rtems_libio_t iop, void buffer, size_t count)
	Reads from a node.

typedef ssize_t(*	rtems_filesystem_readv_t) (rtems_libio_t iop, const struct iovec iov, int iovcnt, ssize_t total)
	Reads an IO vector from a node.

typedef ssize_t(*	rtems_filesystem_write_t) (rtems_libio_t iop, const void buffer, size_t count)
	Writes to a node.

typedef ssize_t(*	rtems_filesystem_writev_t) (rtems_libio_t iop, const struct iovec iov, int iovcnt, ssize_t total)
	Writes an IO vector to a node.

typedef int(*	rtems_filesystem_ioctl_t) (rtems_libio_t iop, ioctl_command_t request, void buffer)
	IO control of a node.

typedef off_t(*	rtems_filesystem_lseek_t) (rtems_libio_t *iop, off_t offset, int whence)
	Moves the read/write file offset.

typedef int(*	rtems_filesystem_fstat_t) (const rtems_filesystem_location_info_t loc, struct stat buf)
	Gets a node status.

typedef int(*	rtems_filesystem_ftruncate_t) (rtems_libio_t *iop, off_t length)
	Truncates a file to a specified length.

typedef int(*	rtems_filesystem_fsync_t) (rtems_libio_t *iop)
	Synchronizes changes to a file.

typedef int(*	rtems_filesystem_fdatasync_t) (rtems_libio_t *iop)
	Synchronizes the data of a file.

typedef int(*	rtems_filesystem_fcntl_t) (rtems_libio_t *iop, int cmd)
	File control.

typedef int(*	rtems_filesystem_poll_t) (rtems_libio_t *iop, int events)
	Poll and select support.

typedef int(*	rtems_filesystem_kqfilter_t) (rtems_libio_t iop, struct knote kn)
	Kernel event filter support.

typedef int(*	rtems_filesystem_mmap_t) (rtems_libio_t iop, void *addr, size_t len, int prot, off_t off)
	MMAP support.

Functions
int	rtems_filesystem_default_open (rtems_libio_t iop, const char path, int oflag, mode_t mode)

int	rtems_filesystem_default_close (rtems_libio_t *iop)

ssize_t	rtems_filesystem_default_read (rtems_libio_t iop, void buffer, size_t count)

ssize_t	rtems_filesystem_default_readv (rtems_libio_t iop, const struct iovec iov, int iovcnt, ssize_t total)
	Calls the read handler for each IO vector entry.

ssize_t	rtems_filesystem_default_write (rtems_libio_t iop, const void buffer, size_t count)

ssize_t	rtems_filesystem_default_writev (rtems_libio_t iop, const struct iovec iov, int iovcnt, ssize_t total)
	Calls the write handler for each IO vector entry.

int	rtems_filesystem_default_ioctl (rtems_libio_t iop, ioctl_command_t request, void buffer)

off_t	rtems_filesystem_default_lseek (rtems_libio_t *iop, off_t offset, int whence)

off_t	rtems_filesystem_default_lseek_directory (rtems_libio_t *iop, off_t offset, int whence)
	An offset 0 with a whence of SEEK_SET will perform a directory rewind operation.

off_t	rtems_filesystem_default_lseek_file (rtems_libio_t *iop, off_t offset, int whence)
	Default lseek() handler for files.

int	rtems_filesystem_default_fstat (const rtems_filesystem_location_info_t loc, struct stat buf)
	Sets the mode to S_IRWXU \| S_IRWXG \| S_IRWXO.

int	rtems_filesystem_default_ftruncate (rtems_libio_t *iop, off_t length)

int	rtems_filesystem_default_ftruncate_directory (rtems_libio_t *iop, off_t length)

int	rtems_filesystem_default_fsync_or_fdatasync (rtems_libio_t *iop)

int	rtems_filesystem_default_fsync_or_fdatasync_success (rtems_libio_t *iop)

int	rtems_filesystem_default_fcntl (rtems_libio_t *iop, int cmd)

int	rtems_filesystem_default_poll (rtems_libio_t *iop, int events)
	Default poll handler.

int	rtems_filesystem_default_kqfilter (rtems_libio_t iop, struct knote kn)
	Default kernel event filter handler.

int	rtems_filesystem_default_mmap (rtems_libio_t iop, void *addr, size_t len, int prot, off_t off)
	Default MMAP handler.

Variables
const rtems_filesystem_file_handlers_r	rtems_filesystem_handlers_default
	File system node handler table with default node handlers.

Detailed Description

File system node handler.

Typedef Documentation

◆ rtems_filesystem_close_t

typedef int(* rtems_filesystem_close_t) (rtems_libio_t *iop)

Closes a node.

Parameters

[in,out] iop The IO pointer.

Return values

0	Successful operation.
-1	An error occurred. The errno is set to indicate the error.

See also: rtems_filesystem_default_close().

◆ rtems_filesystem_fcntl_t

typedef int(* rtems_filesystem_fcntl_t) (rtems_libio_t *iop, int cmd)

File control.

Parameters

[in,out]	iop	The IO pointer.
[in]	cmd	Control command.

Return values

0	Successful operation.
errno	An error occurred. This value is assigned to errno.

See also: rtems_filesystem_default_fcntl().

◆ rtems_filesystem_fdatasync_t

typedef int(* rtems_filesystem_fdatasync_t) (rtems_libio_t *iop)

Synchronizes the data of a file.

Parameters

[in,out] iop The IO pointer.

Return values

0	Successful operation.
-1	An error occurred. The errno is set to indicate the error.

See also: rtems_filesystem_default_fsync_or_fdatasync() and rtems_filesystem_default_fsync_or_fdatasync_success().

◆ rtems_filesystem_fstat_t

typedef int(* rtems_filesystem_fstat_t) (const rtems_filesystem_location_info_t *loc, struct stat *buf)

Gets a node status.

Parameters

[in,out]	iop	The IO pointer.
[out]	stat	The buffer to status information.

Return values

0	Successful operation.
-1	An error occurred. The errno is set to indicate the error.

See also: rtems_filesystem_default_fstat().

◆ rtems_filesystem_fsync_t

typedef int(* rtems_filesystem_fsync_t) (rtems_libio_t *iop)

Synchronizes changes to a file.

Parameters

[in,out] iop The IO pointer.

Return values

0	Successful operation.
-1	An error occurred. The errno is set to indicate the error.

See also: rtems_filesystem_default_fsync_or_fdatasync() and rtems_filesystem_default_fsync_or_fdatasync_success().

◆ rtems_filesystem_ftruncate_t

typedef int(* rtems_filesystem_ftruncate_t) (rtems_libio_t *iop, off_t length)

Truncates a file to a specified length.

Parameters

[in,out]	iop	The IO pointer.
[in]	length	The new length in characters.

Return values

0	Successful operation.
-1	An error occurred. The errno is set to indicate the error.

See also: rtems_filesystem_default_ftruncate() and rtems_filesystem_default_ftruncate_directory().

◆ rtems_filesystem_ioctl_t

typedef int(* rtems_filesystem_ioctl_t) (rtems_libio_t *iop, ioctl_command_t request, void *buffer)

IO control of a node.

Parameters

[in,out]	iop	The IO pointer.
[in]	request	The IO control request.
[in,out]	buffer	The buffer for IO control request data.

Return values

0	Successful operation.
-1	An error occurred. The errno is set to indicate the error.

See also: rtems_filesystem_default_ioctl().

◆ rtems_filesystem_kqfilter_t

typedef int(* rtems_filesystem_kqfilter_t) (rtems_libio_t *iop, struct knote *kn)

Kernel event filter support.

Parameters

[in,out]	iop	The IO pointer.
[in]	kn	The kernel event note.

Return values

0	Successful operation.
error	An error occurred. This is usually EINVAL.

See also: rtems_filesystem_default_kqfilter().

◆ rtems_filesystem_lseek_t

typedef off_t(* rtems_filesystem_lseek_t) (rtems_libio_t *iop, off_t offset, int whence)

Moves the read/write file offset.

Parameters

[in,out]	iop	The IO pointer.
[in]	offset	The offset.
[in]	whence	The reference position for the offset.

Return values

non-negative	The new offset from the beginning of the file.
-1	An error occurred. The errno is set to indicate the error.

See also: rtems_filesystem_default_lseek(), rtems_filesystem_default_lseek_file(), and rtems_filesystem_default_lseek_directory().

◆ rtems_filesystem_mmap_t

typedef int(* rtems_filesystem_mmap_t) (rtems_libio_t *iop, void **addr, size_t len, int prot, off_t off)

MMAP support.

Parameters

[in,out]	iop	The IO pointer.
[in,out]	addr	The starting address of the mapped memory.
[in]	len	The maximum number of bytes to map.
[in]	prot	The desired memory protection.
[in]	off	The offset within the file descriptor to map.

Return values

0	Successful operation.
error	An error occurred. This is usually EINVAL.

See also: rtems_filesystem_default_mmap().

◆ rtems_filesystem_open_t

typedef int(* rtems_filesystem_open_t) (rtems_libio_t *iop, const char *path, int oflag, mode_t mode)

Opens a node.

Parameters

[in,out]	iop	The IO pointer.
[in]	path	The path.
[in]	oflag	The open flags.
[in]	mode	Optional mode for node creation.

Return values

0	Successful operation.
-1	An error occurred. The errno is set to indicate the error.

See also: rtems_filesystem_default_open().

◆ rtems_filesystem_poll_t

typedef int(* rtems_filesystem_poll_t) (rtems_libio_t *iop, int events)

Poll and select support.

Parameters

[in,out]	iop	The IO pointer.
[in]	events	The poll events.

Returns: The poll return events.

See also: rtems_filesystem_default_poll().

◆ rtems_filesystem_read_t

typedef ssize_t(* rtems_filesystem_read_t) (rtems_libio_t *iop, void *buffer, size_t count)

Reads from a node.

This handler is responsible to update the offset field of the IO descriptor.

Parameters

[in,out]	iop	The IO pointer.
[out]	buffer	The buffer for read data.
[in]	count	The size of the buffer in characters.

Return values

non-negative	Count of read characters.
-1	An error occurred. The errno is set to indicate the error.

See also: rtems_filesystem_default_read().

◆ rtems_filesystem_readv_t

typedef ssize_t(* rtems_filesystem_readv_t) (rtems_libio_t *iop, const struct iovec *iov, int iovcnt, ssize_t total)

Reads an IO vector from a node.

This handler is responsible to update the offset field of the IO descriptor.

Parameters

[in,out]	iop	The IO pointer.
[in]	iov	The IO vector with buffer for read data. The caller must ensure that the IO vector values are valid.
[in]	iovcnt	The count of buffers in the IO vector.
[in]	total	The total count of bytes in the buffers in the IO vector.

Return values

non-negative	Count of read characters.
-1	An error occurred. The errno is set to indicate the error.

See also: rtems_filesystem_default_readv().

◆ rtems_filesystem_write_t

typedef ssize_t(* rtems_filesystem_write_t) (rtems_libio_t *iop, const void *buffer, size_t count)

Writes to a node.

This handler is responsible to update the offset field of the IO descriptor.

Parameters

[in,out]	iop	The IO pointer.
[out]	buffer	The buffer for write data.
[in]	count	The size of the buffer in characters.

Return values

non-negative	Count of written characters.
-1	An error occurred. The errno is set to indicate the error.

See also: rtems_filesystem_default_write().

◆ rtems_filesystem_writev_t

typedef ssize_t(* rtems_filesystem_writev_t) (rtems_libio_t *iop, const struct iovec *iov, int iovcnt, ssize_t total)

Writes an IO vector to a node.

This handler is responsible to update the offset field of the IO descriptor.

Parameters

[in,out]	iop	The IO pointer.
[in]	iov	The IO vector with buffer for write data. The caller must ensure that the IO vector values are valid.
[in]	iovcnt	The count of buffers in the IO vector.
[in]	total	The total count of bytes in the buffers in the IO vector.

Return values

non-negative	Count of written characters.
-1	An error occurred. The errno is set to indicate the error.

See also: rtems_filesystem_default_writev().

Function Documentation

◆ rtems_filesystem_default_close()

int rtems_filesystem_default_close ( rtems_libio_t * iop )

Return values

0 Always.

See also: rtems_filesystem_close_t.

◆ rtems_filesystem_default_fcntl()

int rtems_filesystem_default_fcntl	(	rtems_libio_t *	iop,
		int	cmd
	)

Return values

0 Always.

See also: rtems_filesystem_fcntl_t.

◆ rtems_filesystem_default_fstat()

int rtems_filesystem_default_fstat	(	const rtems_filesystem_location_info_t *	loc,
		struct stat *	buf
	)

Sets the mode to S_IRWXU | S_IRWXG | S_IRWXO.

Return values

0 Always.

See also: rtems_filesystem_fstat_t.

◆ rtems_filesystem_default_fsync_or_fdatasync()

int rtems_filesystem_default_fsync_or_fdatasync ( rtems_libio_t * iop )

Return values

-1	Always. The errno is set to EINVAL.

See also: rtems_filesystem_fsync_t and rtems_filesystem_fdatasync_t.

◆ rtems_filesystem_default_fsync_or_fdatasync_success()

int rtems_filesystem_default_fsync_or_fdatasync_success ( rtems_libio_t * iop )

Return values

0 Always.

See also: rtems_filesystem_fsync_t and rtems_filesystem_fdatasync_t.

◆ rtems_filesystem_default_ftruncate()

int rtems_filesystem_default_ftruncate	(	rtems_libio_t *	iop,
		off_t	length
	)

Return values

-1	Always. The errno is set to EINVAL.

See also: rtems_filesystem_ftruncate_t.

◆ rtems_filesystem_default_ftruncate_directory()

int rtems_filesystem_default_ftruncate_directory	(	rtems_libio_t *	iop,
		off_t	length
	)

Return values

-1	Always. The errno is set to EISDIR.

See also: rtems_filesystem_ftruncate_t.

◆ rtems_filesystem_default_ioctl()

int rtems_filesystem_default_ioctl	(	rtems_libio_t *	iop,
		ioctl_command_t	request,
		void *	buffer
	)

Return values

-1	Always. The errno is set to ENOTTY.

See also: rtems_filesystem_ioctl_t.

◆ rtems_filesystem_default_kqfilter()

int rtems_filesystem_default_kqfilter	(	rtems_libio_t *	iop,
		struct knote *	kn
	)

Default kernel event filter handler.

Return values

EINVAL Always.

See also: rtems_filesystem_kqfilter_t.

◆ rtems_filesystem_default_lseek()

off_t rtems_filesystem_default_lseek	(	rtems_libio_t *	iop,
		off_t	offset,
		int	whence
	)

Return values

-1	Always. The errno is set to ESPIPE.

See also: rtems_filesystem_lseek_t.

◆ rtems_filesystem_default_lseek_directory()

off_t rtems_filesystem_default_lseek_directory	(	rtems_libio_t *	iop,
		off_t	offset,
		int	whence
	)

An offset 0 with a whence of SEEK_SET will perform a directory rewind operation.

This function has no protection against concurrent access.

Return values

-1	The offset is not zero or the whence is not SEEK_SET.
0	Successful rewind operation.

See also: rtems_filesystem_lseek_t.

◆ rtems_filesystem_default_lseek_file()

off_t rtems_filesystem_default_lseek_file	(	rtems_libio_t *	iop,
		off_t	offset,
		int	whence
	)

Default lseek() handler for files.

The fstat() handler will be used to obtain the file size in case whence is SEEK_END.

This function has no protection against concurrent access.

Return values

-1	An error occurred. In case an integer overflow occurred, then the errno will be set to EOVERFLOW. In case the new offset is negative, then the errno will be set to EINVAL. In case the whence is SEEK_END and the fstat() handler to obtain the current file size returned an error status, then the errno will be set by the fstat() handler.
offset	The new offset.

See also: rtems_filesystem_lseek_t.

◆ rtems_filesystem_default_mmap()

int rtems_filesystem_default_mmap	(	rtems_libio_t *	iop,
		void **	addr,
		size_t	len,
		int	prot,
		off_t	off
	)

Default MMAP handler.

Return values

ENOTSUP Always.

See also: rtems_filesystem_mmap_t.

◆ rtems_filesystem_default_open()

int rtems_filesystem_default_open	(	rtems_libio_t *	iop,
		const char *	path,
		int	oflag,
		mode_t	mode
	)

Return values

0 Always.

See also: rtems_filesystem_open_t.

◆ rtems_filesystem_default_poll()

int rtems_filesystem_default_poll	(	rtems_libio_t *	iop,
		int	events
	)

Default poll handler.

Return values

POLLERR Always.

See also: rtems_filesystem_poll_t.

◆ rtems_filesystem_default_read()

ssize_t rtems_filesystem_default_read	(	rtems_libio_t *	iop,
		void *	buffer,
		size_t	count
	)

Return values

-1	Always. The errno is set to ENOTSUP.

See also: rtems_filesystem_read_t.

◆ rtems_filesystem_default_readv()

ssize_t rtems_filesystem_default_readv	(	rtems_libio_t *	iop,
		const struct iovec *	iov,
		int	iovcnt,
		ssize_t	total
	)

Calls the read handler for each IO vector entry.

See also: rtems_filesystem_readv_t.

◆ rtems_filesystem_default_write()

ssize_t rtems_filesystem_default_write	(	rtems_libio_t *	iop,
		const void *	buffer,
		size_t	count
	)

Return values

-1	Always. The errno is set to ENOTSUP.

See also: rtems_filesystem_write_t.

◆ rtems_filesystem_default_writev()

ssize_t rtems_filesystem_default_writev	(	rtems_libio_t *	iop,
		const struct iovec *	iov,
		int	iovcnt,
		ssize_t	total
	)

Calls the write handler for each IO vector entry.

See also: rtems_filesystem_write_t.

Files

Data Structures

Typedefs

Functions

Variables

Detailed Description

Typedef Documentation

◆ rtems_filesystem_close_t

◆ rtems_filesystem_fcntl_t

◆ rtems_filesystem_fdatasync_t

◆ rtems_filesystem_fstat_t

◆ rtems_filesystem_fsync_t

◆ rtems_filesystem_ftruncate_t

◆ rtems_filesystem_ioctl_t

◆ rtems_filesystem_kqfilter_t

◆ rtems_filesystem_lseek_t

◆ rtems_filesystem_mmap_t

◆ rtems_filesystem_open_t

◆ rtems_filesystem_poll_t

◆ rtems_filesystem_read_t

◆ rtems_filesystem_readv_t

◆ rtems_filesystem_write_t

◆ rtems_filesystem_writev_t

Function Documentation

◆ rtems_filesystem_default_close()

◆ rtems_filesystem_default_fcntl()

◆ rtems_filesystem_default_fstat()

◆ rtems_filesystem_default_fsync_or_fdatasync()

◆ rtems_filesystem_default_fsync_or_fdatasync_success()

◆ rtems_filesystem_default_ftruncate()

◆ rtems_filesystem_default_ftruncate_directory()

◆ rtems_filesystem_default_ioctl()

◆ rtems_filesystem_default_kqfilter()

◆ rtems_filesystem_default_lseek()

◆ rtems_filesystem_default_lseek_directory()

◆ rtems_filesystem_default_lseek_file()

◆ rtems_filesystem_default_mmap()

◆ rtems_filesystem_default_open()

◆ rtems_filesystem_default_poll()

◆ rtems_filesystem_default_read()

◆ rtems_filesystem_default_readv()

◆ rtems_filesystem_default_write()

◆ rtems_filesystem_default_writev()