libmemif.h File Reference

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Data Structures
struct	memif_conn_args_t
	Memif connection arguments. More...
struct	memif_buffer_t
	Memif buffer. More...
struct	memif_queue_details_t
	Memif queue details. More...
struct	memif_region_details_t
	Memif region details. More...
struct	memif_details_t
	Memif details. More...

Macros
#define	LIBMEMIF_VERSION   "2.0"
	Libmemif version. More...
#define	MEMIF_DEFAULT_APP_NAME   "libmemif-app"
	Default name of application using libmemif. More...
#define	MEMIF_FD_EVENT_READ   (1 << 0)
	user needs to set events that occured on fd and pass them to memif_control_fd_handler More...
#define	MEMIF_FD_EVENT_WRITE   (1 << 1)
#define	MEMIF_FD_EVENT_ERROR   (1 << 2)
	inform libmemif that error occured on fd More...
#define	MEMIF_FD_EVENT_DEL   (1 << 3)
	if set, informs that fd is going to be closed (user may want to stop watching for events on this fd) More...
#define	MEMIF_FD_EVENT_MOD   (1 << 4)
	update events More...
#define	MEMIF_BUFFER_FLAG_NEXT   (1 << 0)
	next buffer present (chained buffers) More...
#define	MEMIF_BUFFER_FLAG_RX   (1 << 1)
	states that buffer is from rx ring More...
#define	MEMIF_QUEUE_FLAG_POLLING   1
	if set queue is in polling mode, else in interrupt mode More...
#define	MEMIF_HAVE_CANCEL_POLL_EVENT   1
	Send signal to stop concurrently running memif_poll_event(). More...

Typedefs
typedef void *	memif_conn_handle_t
	Memif connection handle pointer of type void, pointing to internal structure. More...
typedef void *(	memif_alloc_t) (size_t size)
	Memif allocator alloc. More...
typedef void *(	memif_realloc_t) (void *ptr, size_t size)
	Memif realloc. More...
typedef void(	memif_free_t) (void *ptr)
	Memif allocator free. More...
typedef int(	memif_control_fd_update_t) (int fd, uint8_t events)
	Memif control file descriptor update (callback function) More...
typedef int(	memif_connection_update_t) (memif_conn_handle_t conn, void *private_ctx)
	Memif connection status update (callback function) More...
typedef int(	memif_interrupt_t) (memif_conn_handle_t conn, void *private_ctx, uint16_t qid)
	Memif interrupt occured (callback function) More...
typedef uint32_t(	memif_get_external_buffer_offset_t) (void *private_ctx)
	Get external buffer offset (optional) More...
typedef int(	memif_add_external_region_t) (void **addr, uint32_t size, int *fd, void *private_ctx)
	Add external region. More...
typedef void *(	memif_get_external_region_addr_t) (uint32_t size, int fd, void *private_ctx)
	Get external region address. More...
typedef int(	memif_del_external_region_t) (void *addr, uint32_t size, int fd, void *private_ctx)
	Delete external region. More...

Enumerations
enum	memif_err_t {   MEMIF_ERR_SUCCESS = 0, MEMIF_ERR_SYSCALL, MEMIF_ERR_CONNREFUSED, MEMIF_ERR_ACCES,   MEMIF_ERR_NO_FILE, MEMIF_ERR_FILE_LIMIT, MEMIF_ERR_PROC_FILE_LIMIT, MEMIF_ERR_ALREADY,   MEMIF_ERR_AGAIN, MEMIF_ERR_BAD_FD, MEMIF_ERR_NOMEM, MEMIF_ERR_INVAL_ARG,   MEMIF_ERR_NOCONN, MEMIF_ERR_CONN, MEMIF_ERR_CB_FDUPDATE, MEMIF_ERR_FILE_NOT_SOCK,   MEMIF_ERR_NO_SHMFD, MEMIF_ERR_COOKIE, MEMIF_ERR_NOBUF_RING, MEMIF_ERR_NOBUF,   MEMIF_ERR_NOBUF_DET, MEMIF_ERR_INT_WRITE, MEMIF_ERR_MFMSG, MEMIF_ERR_QID,   MEMIF_ERR_PROTO, MEMIF_ERR_ID, MEMIF_ERR_ACCSLAVE, MEMIF_ERR_ALRCONN,   MEMIF_ERR_MODE, MEMIF_ERR_SECRET, MEMIF_ERR_NOSECRET, MEMIF_ERR_MAXREG,   MEMIF_ERR_MAXRING, MEMIF_ERR_NO_INTFD, MEMIF_ERR_DISCONNECT, MEMIF_ERR_DISCONNECTED,   MEMIF_ERR_UNKNOWN_MSG, MEMIF_ERR_POLL_CANCEL, MEMIF_ERR_MAX_RING, MEMIF_ERR_PRIVHDR }
enum	memif_interface_mode_t {   MEMIF_INTERFACE_MODE_ETHERNET = 0, MEMIF_INTERFACE_MODE_IP = 1, MEMIF_INTERFACE_MODE_PUNT_INJECT = 2, MEMIF_INTERFACE_MODE_ETHERNET = 0,   MEMIF_INTERFACE_MODE_IP = 1, MEMIF_INTERFACE_MODE_PUNT_INJECT = 2, MEMIF_INTERFACE_MODE_ETHERNET = 0, MEMIF_INTERFACE_MODE_IP = 1,   MEMIF_INTERFACE_MODE_PUNT_INJECT = 2 }
enum	memif_rx_mode_t { MEMIF_RX_MODE_INTERRUPT = 0, MEMIF_RX_MODE_POLLING }

Functions
void	memif_register_external_region (memif_add_external_region_t *ar, memif_get_external_region_addr_t *gr, memif_del_external_region_t *dr, memif_get_external_buffer_offset_t *go)
	Register external region. More...
uint16_t	memif_get_version ()
	Memif get version. More...
int	memif_get_queue_efd (memif_conn_handle_t conn, uint16_t qid, int *fd)
	Memif get queue event file descriptor More...
int	memif_set_rx_mode (memif_conn_handle_t conn, memif_rx_mode_t rx_mode, uint16_t qid)
	Memif set rx mode. More...
char *	memif_strerror (int err_code)
	Memif strerror. More...
int	memif_get_details (memif_conn_handle_t conn, memif_details_t *md, char *buf, ssize_t buflen)
	Memif get details. More...
int	memif_init (memif_control_fd_update_t *on_control_fd_update, char *app_name, memif_alloc_t *memif_alloc, memif_realloc_t *memif_realloc, memif_free_t *memif_free)
	Memif initialization. More...
int	memif_cleanup ()
	Memif cleanup. More...
int	memif_create (memif_conn_handle_t *conn, memif_conn_args_t *args, memif_connection_update_t *on_connect, memif_connection_update_t *on_disconnect, memif_interrupt_t *on_interrupt, void *private_ctx)
	Memory interface create function. More...
int	memif_control_fd_handler (int fd, uint8_t events)
	Memif control file descriptor handler. More...
int	memif_delete (memif_conn_handle_t *conn)
	Memif delete. More...
int	memif_buffer_enq_tx (memif_conn_handle_t conn, uint16_t qid, memif_buffer_t *bufs, uint16_t count, uint16_t *count_out)
	Memif buffer enq tx. More...
int	memif_buffer_alloc (memif_conn_handle_t conn, uint16_t qid, memif_buffer_t *bufs, uint16_t count, uint16_t *count_out, uint16_t size)
	Memif buffer alloc. More...
int	memif_refill_queue (memif_conn_handle_t conn, uint16_t qid, uint16_t count, uint16_t headroom)
	Memif refill ring. More...
int	memif_tx_burst (memif_conn_handle_t conn, uint16_t qid, memif_buffer_t *bufs, uint16_t count, uint16_t *tx)
	Memif transmit buffer burst. More...
int	memif_rx_burst (memif_conn_handle_t conn, uint16_t qid, memif_buffer_t *bufs, uint16_t count, uint16_t *rx)
	Memif receive buffer burst. More...
int	memif_poll_event (int timeout)
	Memif poll event. More...
int	memif_cancel_poll_event ()

Macro Definition Documentation

#define LIBMEMIF_VERSION   "2.0"

Libmemif version.

Definition at line 26 of file libmemif.h.

#define MEMIF_BUFFER_FLAG_NEXT   (1 << 0)

next buffer present (chained buffers)

Definition at line 289 of file libmemif.h.

#define MEMIF_BUFFER_FLAG_RX   (1 << 1)

states that buffer is from rx ring

Definition at line 291 of file libmemif.h.

#define MEMIF_DEFAULT_APP_NAME   "libmemif-app"

Default name of application using libmemif.

Definition at line 28 of file libmemif.h.

#define MEMIF_QUEUE_FLAG_POLLING   1

if set queue is in polling mode, else in interrupt mode

Definition at line 319 of file libmemif.h.

Typedef Documentation

typedef void*( memif_alloc_t) (size_t size)

Memif allocator alloc.

Parameters

size	- requested allocation size

custom memory allocator: alloc function template

Definition at line 108 of file libmemif.h.

typedef void* memif_conn_handle_t

Memif connection handle pointer of type void, pointing to internal structure.

Definition at line 101 of file libmemif.h.

typedef void( memif_free_t) (void *ptr)

Memif allocator free.

Parameters

size	- requested allocation size

custom memory allocator: free function template

Definition at line 124 of file libmemif.h.

typedef void*( memif_realloc_t) (void *ptr, size_t size)

Memif realloc.

Parameters

ptr	- pointer to memory block
size	- requested allocation size

custom memory reallocation

Definition at line 117 of file libmemif.h.

Enumeration Type Documentation

enum memif_err_t

Error codes

Enumerator
MEMIF_ERR_SUCCESS	success
MEMIF_ERR_SYSCALL	other syscall error
MEMIF_ERR_CONNREFUSED	connection refused
MEMIF_ERR_ACCES	permission denied
MEMIF_ERR_NO_FILE	file does not exist
MEMIF_ERR_FILE_LIMIT	system open file limit
MEMIF_ERR_PROC_FILE_LIMIT	process open file limit
MEMIF_ERR_ALREADY	connection already requested
MEMIF_ERR_AGAIN	fd is not socket, or operation would block
MEMIF_ERR_BAD_FD	invalid fd
MEMIF_ERR_NOMEM	out of memory
MEMIF_ERR_INVAL_ARG	invalid argument
MEMIF_ERR_NOCONN	handle points to no connection
MEMIF_ERR_CONN	handle points to existing connection
MEMIF_ERR_CB_FDUPDATE	user defined callback memif_control_fd_update_t error
MEMIF_ERR_FILE_NOT_SOCK	file specified by socket filename exists, but it's not socket
MEMIF_ERR_NO_SHMFD	missing shm fd
MEMIF_ERR_COOKIE	wrong cookie on ring
MEMIF_ERR_NOBUF_RING	ring buffer full
MEMIF_ERR_NOBUF	not enough memif buffers
MEMIF_ERR_NOBUF_DET	memif details needs larger buffer
MEMIF_ERR_INT_WRITE	send interrupt error
MEMIF_ERR_MFMSG	malformed msg received
MEMIF_ERR_QID	invalid queue id
MEMIF_ERR_PROTO	incompatible protocol version
MEMIF_ERR_ID	unmatched interface id
MEMIF_ERR_ACCSLAVE	slave cannot accept connection requests
MEMIF_ERR_ALRCONN	memif is already connected
MEMIF_ERR_MODE	mode mismatch
MEMIF_ERR_SECRET	secret mismatch
MEMIF_ERR_NOSECRET	secret required
MEMIF_ERR_MAXREG	max region limit reached
MEMIF_ERR_MAXRING	max ring limit reached
MEMIF_ERR_NO_INTFD	missing interrupt fd
MEMIF_ERR_DISCONNECT	disconenct received
MEMIF_ERR_DISCONNECTED	peer interface disconnected
MEMIF_ERR_UNKNOWN_MSG	unknown message type
MEMIF_ERR_POLL_CANCEL	memif_poll_event() was cancelled
MEMIF_ERR_MAX_RING	too large ring size
MEMIF_ERR_PRIVHDR	private hdrs not supported

Definition at line 33 of file libmemif.h.