NAME

       votequorum_trackstart - Enable callbacks notification.

SYNOPSIS

       #include <corosync/votequorum.h>

       int  votequorum_trackstart(votequorum_handle_t  *handle,  uint64_t  context,  unsigned int
       flags);

DESCRIPTION

       The votequorum_trackstart function is used  to  enable  callbacks  notification  from  the
       votequorum API.

       Every  time  the voting configuraton changes (eg a node joins or leave the cluster) or the
       quorum status change or the expected votes changes, the notification is queued.

       The notification is dispatched via votequorum_dispatch() function that  will  execute  the
       callback.

       The context option allows one to set a tracking context.

       The  flags  argument  is  defined by one or more of the following values and values can be
       bitwise-or'd

       #define CS_TRACK_CURRENT      0x01
       #define CS_TRACK_CHANGES      0x02
       #define CS_TRACK_CHANGES_ONLY 0x04

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 interrupted by a signal

       CS_ERR_NOT_SUPPORTED The requested protocol/functionality not supported

       CS_ERR_MESSAGE_ERROR Incorrect auth message received

       CS_ERR_NO_MEMORY Not enough memory to complete the requested task

SEE ALSO

       votequorum_overview(8),         votequorum_initialize(3),          votequorum_finalize(3),
       votequorum_getinfo(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)