QUORUM_INITIALIZE(Corosync Cluster Engine Programmer's ManQUORUM_INITIALIZE(3)NAMEquorum_initialize - Create a new connection to the Quorum service
SYNOPSIS
#include <corosync/quorum.h>
int quorum_initialize(quorum_handle_t *handle, quorum_callbacks_t
*callbacks, uint32_t *quorum_type);
DESCRIPTION
The quorum_initialize function is used to initialize a connection to
the quorum API.
Each application may have several connections to the quorum API. Each
application uses the handle argument to uniquely identify the connec‐
tion. The handle argument is then used in other function calls to
identify the connection to be used for communication with the quorum
service.
Every time the voting configuraton changes (eg a node joins or leave
the cluster) or the quorum status change, the callback is called. The
callback function is described by the following type definitions:
typedef void (*quorum_notification_fn_t) (
quorum_handle_t handle,
uint32_t quorate,
uint64_t ring_seq,
uint32_t view_list_entries,
uint32_t *view_list
);
The callbacks argument is of the type:
typedef struct {
quorum_notification_fn_t quorum_notify_fn;
} quorum_callbacks_t;
The quorum_type argument is set to:
#define QUORUM_FREE 0
#define QUORUM_SET 1
QUORUM_FREE value means that no quorum algorithm is loaded and that no
callbacks will take place.
QUORUM_SET value means that one quorum algorithm is configured and that
callbacks will take place.
When a configuration change occurs, the callback is called from the
quorum_dispatch() function.
RETURN VALUE
This call returns the CS_OK value if successful, otherwise an error is
returned.
ERRORS
CS_ERR_TRY_AGAIN Resource temporarily unavailable
CS_ERR_INVALID_PARAM Invalid argument
CS_ERR_ACCESS Permission denied
CS_ERR_LIBRARY The connection failed
CS_ERR_INTERRUPT System call inturrupted by a signal
CS_ERR_NOT_SUPPORTED The requested protocol/functuality not supported
CS_ERR_MESSAGE_ERROR Incorrect auth message received
CS_ERR_NO_MEMORY Not enough memory to completed the requested task
SEE ALSOquorum_overview(8), quorum_finalize(3), quorum_getquorate(3), quo‐
rum_trackstart(3), quorum_trackstop(3), quorum_fd_get(3), quorum_dis‐
patch(3), quorum_context_set(3), quorum_context_get(3)corosync Man Page 2014-05-12 QUORUM_INITIALIZE(3)
