VOTEQUORUM_INITIALCorosync Cluster Engine Programmer'sVOTEQUORUM_INITIALIZE(3)NAMEvotequorum_initialize - Create a new connection to the VoteQuorum ser‐
vice
SYNOPSIS
#include <corosync/votequorum.h>
int votequorum_initialize(votequorum_handle_t *handle, votequorum_call‐
backs_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 con‐
nection. The handle argument is then used in other function calls to
identify the connection to be used for communication with the votequo‐
rum 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 ALSOvotequorum_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), vote‐
quorum_context_get(3), votequorum_setexpected(3), votequo‐
rum_setvotes(3)corosync Man Page 2014-05-12 VOTEQUORUM_INITIALIZE(3)
