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)

corosync Man Page                                  2019-05-30                           VOTEQUORUM_INITIALIZE(3)