#define _LIBMEMIF_H_
/** Libmemif version. */
-#define LIBMEMIF_VERSION "2.0"
+#define LIBMEMIF_VERSION "2.1"
/** Default name of application using libmemif. */
#define MEMIF_DEFAULT_APP_NAME "libmemif-app"
#include <inttypes.h>
+#include <sys/timerfd.h>
/*! Error codes */
typedef enum
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
+ 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 */
@param err_code - error code
Converts error code to error message.
-
+
\return Error string
*/
char *memif_strerror (int err_code);
@param private_ctx - private contex passed back to user with callback
Creates memory interface.
-
- SLAVE-MODE -
+
+ SLAVE-MODE -
Start timer that will send events to timerfd. If this fd is passed to memif_control_fd_handler
every disconnected memif in slave mode will send connection request.
On success new fd is passed to user with memif_control_fd_update_t.
- MASTER-MODE -
+ MASTER-MODE -
Create listener socket and pass fd to user with memif_cntrol_fd_update_t.
If this fd is passed to memif_control_fd_handler accept will be called and
new fd will be passed to user with memif_control_fd_update_t.
If event occures on any control fd, call memif_control_fd_handler.
Internal - lib will "identify" fd (timerfd, lsitener, control) and handle event accordingly.
-
- FD-TYPE -
- TIMERFD -
+
+ FD-TYPE -
+ TIMERFD -
Every disconnected memif in slave mode will request connection.
- LISTENER or CONTROL -
+ LISTENER or CONTROL -
Handle socket messaging (internal connection establishment).
- INTERRUPT -
+ INTERRUPT -
Call on_interrupt callback (if set).
-
+
\return memif_err_t
*/
/** \brief Memif poll event
@param timeout - timeout in seconds
- Passive event polling -
+ Passive event polling -
timeout = 0 - dont wait for event, check event queue if there is an event and return.
timeout = -1 - wait until event
*/
#define MEMIF_HAVE_CANCEL_POLL_EVENT 1
int memif_cancel_poll_event ();
+
+/** \brief Set connection request timer value
+ @param timer - new timer value
+
+ Timer on which all disconnected slaves request connection.
+ See system call 'timer_settime' man-page.
+
+ \return memif_err_t
+*/
+int memif_set_connection_request_timer(struct itimerspec timer);
+
+/** \brief Send connection request
+ @param conn - memif connection handle
+
+ Only slave interface can request connection.
+
+ \return memif_err_t
+*/
+int memif_request_connection(memif_conn_handle_t conn);
/** @} */
#endif /* _LIBMEMIF_H_ */
lm->free = mf;
}
+int
+memif_set_connection_request_timer(struct itimerspec timer)
+{
+ libmemif_main_t *lm = &libmemif_main;
+ int err = MEMIF_ERR_SUCCESS;
+
+ lm->arm = timer;
+
+ /* overwrite timer, if already armed */
+ if (lm->disconn_slaves != 0)
+ {
+ if (timerfd_settime (lm->timerfd, 0, &lm->arm, NULL) < 0)
+ {
+ err = memif_syscall_error_handler (errno);
+ }
+ }
+ return err;
+}
+
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,
goto error;
}
- lm->arm.it_value.tv_sec = 2;
- lm->arm.it_value.tv_nsec = 0;
- lm->arm.it_interval.tv_sec = 2;
- lm->arm.it_interval.tv_nsec = 0;
+ lm->arm.it_value.tv_sec = MEMIF_DEFAULT_RECONNECT_PERIOD_SEC;
+ lm->arm.it_value.tv_nsec = MEMIF_DEFAULT_RECONNECT_PERIOD_NSEC;
+ lm->arm.it_interval.tv_sec = MEMIF_DEFAULT_RECONNECT_PERIOD_SEC;
+ lm->arm.it_interval.tv_nsec = MEMIF_DEFAULT_RECONNECT_PERIOD_NSEC;
if (lm->control_fd_update (lm->timerfd, MEMIF_FD_EVENT_READ) < 0)
{
}
else
{
- if (lm->disconn_slaves == 0)
- {
- if (timerfd_settime (lm->timerfd, 0, &lm->arm, NULL) < 0)
- {
- err = memif_syscall_error_handler (errno);
- goto error;
- }
- }
-
lm->disconn_slaves++;
list_elt.key = -1;
err = MEMIF_ERR_NOMEM;
goto error;
}
- }
- conn->index = index;
+ conn->index = index;
+
+ /* try connectiong to master */
+ err = memif_request_connection(conn);
+ if ((err < 0) && (lm->disconn_slaves == 1))
+ {
+ /* connection failed, arm reconnect timer (if not armed) */
+ if (timerfd_settime (lm->timerfd, 0, &lm->arm, NULL) < 0)
+ {
+ err = memif_syscall_error_handler (errno);
+ goto error;
+ }
+ }
+ }
return 0;
return err;
}
+int
+memif_request_connection(memif_conn_handle_t c)
+{
+ libmemif_main_t *lm = &libmemif_main;
+ memif_connection_t *conn = (memif_connection_t *) c;
+ int err = MEMIF_ERR_SUCCESS;
+ int sockfd = -1;
+ struct sockaddr_un sun;
+
+ if (conn->args.is_master)
+ return MEMIF_ERR_INVAL_ARG;
+ if (conn->fd > 0)
+ return MEMIF_ERR_ALRCONN;
+
+ sockfd = socket (AF_UNIX, SOCK_SEQPACKET, 0);
+ if (sockfd < 0)
+ {
+ err = memif_syscall_error_handler (errno);
+ goto error;
+ }
+
+ sun.sun_family = AF_UNIX;
+
+ strncpy (sun.sun_path, (char *) conn->args.socket_filename,
+ sizeof (sun.sun_path) - 1);
+
+ if (connect (sockfd, (struct sockaddr *) &sun,
+ sizeof (struct sockaddr_un)) == 0)
+ {
+ conn->fd = sockfd;
+ conn->read_fn = memif_conn_fd_read_ready;
+ conn->write_fn = memif_conn_fd_write_ready;
+ conn->error_fn = memif_conn_fd_error;
+
+ lm->control_list[conn->index].key = conn->fd;
+
+ lm->control_fd_update (sockfd,
+ MEMIF_FD_EVENT_READ |
+ MEMIF_FD_EVENT_WRITE);
+
+ lm->disconn_slaves--;
+ if (lm->disconn_slaves == 0)
+ {
+ if (timerfd_settime (lm->timerfd, 0, &lm->disarm, NULL) < 0)
+ {
+ err = memif_syscall_error_handler (errno);
+ return err;
+ }
+ }
+ }
+ else
+ {
+ strcpy ((char *) conn->remote_disconnect_string,
+ memif_strerror (memif_syscall_error_handler
+ (errno)));
+ goto error;
+ }
+
+ return err;
+
+error:
+ if (sockfd > 0)
+ close (sockfd);
+ sockfd = -1;
+ return err;
+}
+
int
memif_control_fd_handler (int fd, uint8_t events)
{
- int i, sockfd = -1, err = MEMIF_ERR_SUCCESS; /* 0 */
+ int i, err = MEMIF_ERR_SUCCESS; /* 0 */
uint16_t num;
memif_list_elt_t *e = NULL;
memif_connection_t *conn;
conn = lm->control_list[i].data_struct;
if (conn->args.is_master)
continue;
-
- struct sockaddr_un sun;
- sockfd = socket (AF_UNIX, SOCK_SEQPACKET, 0);
- if (sockfd < 0)
- {
- err = memif_syscall_error_handler (errno);
- goto error;
- }
-
- sun.sun_family = AF_UNIX;
-
- strncpy (sun.sun_path, (char *) conn->args.socket_filename,
- sizeof (sun.sun_path) - 1);
-
- if (connect (sockfd, (struct sockaddr *) &sun,
- sizeof (struct sockaddr_un)) == 0)
- {
- conn->fd = sockfd;
- conn->read_fn = memif_conn_fd_read_ready;
- conn->write_fn = memif_conn_fd_write_ready;
- conn->error_fn = memif_conn_fd_error;
-
- lm->control_list[conn->index].key = conn->fd;
-
- lm->control_fd_update (sockfd,
- MEMIF_FD_EVENT_READ |
- MEMIF_FD_EVENT_WRITE);
-
- lm->disconn_slaves--;
- if (lm->disconn_slaves == 0)
- {
- if (timerfd_settime (lm->timerfd, 0, &lm->disarm, NULL)
- < 0)
- {
- err = memif_syscall_error_handler (errno);
- goto error;
- }
- }
- }
- else
- {
- strcpy ((char *) conn->remote_disconnect_string,
- memif_strerror (memif_syscall_error_handler
- (errno)));
- }
+ memif_request_connection(conn);
}
}
}
get_list_elt (&e, lm->listener_list, lm->listener_list_len, fd);
if (e != NULL)
{
- memif_conn_fd_accept_ready ((memif_socket_t *) e->data_struct);
- return MEMIF_ERR_SUCCESS;
+ err = memif_conn_fd_accept_ready ((memif_socket_t *) e->data_struct);
+ return err;
}
get_list_elt (&e, lm->pending_list, lm->pending_list_len, fd);
if (e != NULL)
{
- memif_read_ready (fd);
- return MEMIF_ERR_SUCCESS;
+ err = memif_read_ready (fd);
+ return err;
}
get_list_elt (&e, lm->control_list, lm->control_list_len, fd);
return MEMIF_ERR_SUCCESS; /* 0 */
error:
- if (sockfd > 0)
- close (sockfd);
- sockfd = -1;
return err;
}
Code Review / vpp.git / commitdiff