votequorum_initialize(3) [centos man page]

VOTEQUORUM_INITIALIZE(3)			    Corosync Cluster Engine Programmer's Manual 			  VOTEQUORUM_INITIALIZE(3)

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[]
	    );

       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),  votequo-
       rum_fd_get(3),	votequorum_dispatch(3),   votequorum_context_set(3),   votequorum_context_get(3),   votequorum_setexpected(3),	  votequo-
       rum_setvotes(3)

corosync Man Page						    2014-06-10						  VOTEQUORUM_INITIALIZE(3)

VOTEQUORUM_GETINFO(3)				    Corosync Cluster Engine Programmer's Manual 			     VOTEQUORUM_GETINFO(3)

NAME

       votequorum_getinfo - Get information about the VoteQuorum service

SYNOPSIS

       #include <corosync/votequorum.h>

       int votequorum_getinfo(votequorum_handle_t *handle, unsigned int nodeid, struct votequorum_info *info);

DESCRIPTION

       The votequorum_getinfo function is used to get information about the voting system and its nodes.

       The nodeid argument indicates which node information should be stored in the votequorum_info structure.

       The votequorum_info structure is defined as follows:

       struct votequorum_info {
	       unsigned int node_id;
	       unsigned int node_state;
	       unsigned int node_votes;
	       unsigned int node_expected_votes;
	       unsigned int highest_expected;
	       unsigned int total_votes;
	       unsigned int quorum;
	       unsigned int flags;
	       unsigned int qdevice_votes;
	       char qdevice_name[VOTEQUORUM_QDEVICE_MAX_NAME_LEN];
       };

       The node_state is defined as:

       #define VOTEQUORUM_NODESTATE_MEMBER     1
       #define VOTEQUORUM_NODESTATE_DEAD       2
       #define VOTEQUORUM_NODESTATE_LEAVING    3

       The flags are defined as:

       #define VOTEQUORUM_INFO_TWONODE		       1
       #define VOTEQUORUM_INFO_QUORATE		       2
       #define VOTEQUORUM_INFO_WAIT_FOR_ALL	       4
       #define VOTEQUORUM_INFO_LAST_MAN_STANDING       8
       #define VOTEQUORUM_INFO_AUTO_TIE_BREAKER       16
       #define VOTEQUORUM_INFO_ALLOW_DOWNSCALE	      32
       #define VOTEQUORUM_INFO_QDEVICE_REGISTERED     64
       #define VOTEQUORUM_INFO_QDEVICE_ALIVE	     128
       #define VOTEQUORUM_INFO_QDEVICE_CAST_VOTE     256
       #define VOTEQUORUM_INFO_QDEVICE_MASTER_WINS   512

       The members starting node_ hold information specific to the requested nodeid, the other are general to the voting system.

RETURN VALUE

       This call returns the CS_OK value if successful, otherwise a generic 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_initialize(3),  votequorum_finalize(3),  votequorum_trackstart(3),	votequorum_trackstop(3),  votequo-
       rum_fd_get(3),	votequorum_dispatch(3),   votequorum_context_set(3),   votequorum_context_get(3),   votequorum_setexpected(3),	  votequo-
       rum_setvotes(3)

corosync Man Page						    2014-06-10						     VOTEQUORUM_GETINFO(3)