NAME

       votequorum_initialize - Create a new connection to the VoteQuorum service

SYNOPSIS

       #include <corosync/votequorum.h>

       int votequorum_initialize(votequorum_handle_t *handle, votequorum_callbacks_t *callbacks);

DESCRIPTION

       The  votequorum_initialize  function  is used to initialize a connection to the vote-based
       quorum database API.

       Each application may have several connections to the  votequorum  API.   Each  application
       uses the handle argument to uniquely identify the connection.  The handle argument is then
       used in other function calls to identify the connection to be used for communication  with
       the votequorum service.

       Every  time  the  voting  configuraton changes (eg a node joins or leave the cluster), the
       callback is called.  The callback function is described by the following type definitions:

       typedef void (*votequorum_notification_fn_t) (
            votequorum_handle_t handle,
            uint64_t context,
            uint32_t quorate,
            uint32_t node_list_entries,
            votequorum_node_t node_list[]
            );

       Current  ring_id   (one   get   in   votequorum_notification_fn)   must   be   passed   to
       votequorum_qdevice_poll to make qdevice voting valid.

       Every  time  the  expected  votes are changed, the callback is called.  The expected votes
       callback function is described by the following type definitions:

       typedef void (*votequorum_expectedvotes_notification_fn_t) (
               votequorum_handle_t handle,
               uint64_t context,
               uint32_t expected_votes);

       The callbacks argument is of the type:

       typedef struct {
            votequorum_notification_fn_t votequorum_notify_fn;
            votequorum_expectedvotes_notification_fn_t votequorum_expectedvotes_notify_fn;
       } votequorum_callbacks_t;

       When a configuration change occurs, the callback is called from the  votequorum_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 ALSO

       votequorum_overview(8),           votequorum_finalize(3),           votequorum_getinfo(3),
       votequorum_trackstart(3),          votequorum_trackstop(3),          votequorum_fd_get(3),
       votequorum_dispatch(3),        votequorum_context_set(3),       votequorum_context_get(3),
       votequorum_setexpected(3), votequorum_setvotes(3)