1QUORUM_INITIALIZE(3C)orosync Cluster Engine Programmer's ManuQaUlORUM_INITIALIZE(3)
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NAME

6       quorum_initialize - Create a new connection to the Quorum service
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SYNOPSIS

9       #include <corosync/quorum.h>
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11       int   quorum_initialize(quorum_handle_t   *handle,   quorum_callbacks_t
12       *callbacks, uint32_t *quorum_type);
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DESCRIPTION

15       The quorum_initialize function is used to initialize  a  connection  to
16       the quorum API.
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18       Each  application may have several connections to the quorum API.  Each
19       application uses the handle argument to uniquely identify  the  connec‐
20       tion.   The  handle  argument  is  then used in other function calls to
21       identify the connection to be used for communication  with  the  quorum
22       service.
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24       Every  time  the voting configuration changes (eg a node joins or leave
25       the cluster) or the quorum status change, the callback is called.   The
26       callback function is described by the following type definitions:
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28       typedef void (*quorum_notification_fn_t) (
29               quorum_handle_t handle,
30               uint32_t quorate,
31               uint64_t ring_seq,
32               uint32_t view_list_entries,
33               uint32_t *view_list
34               );
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36       The callbacks argument is of the type:
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38       typedef struct {
39               quorum_notification_fn_t quorum_notify_fn;
40       } quorum_callbacks_t;
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42       The quorum_type argument is set to:
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44       #define QUORUM_FREE     0
45       #define QUORUM_SET      1
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47       QUORUM_FREE  value means that no quorum algorithm is loaded and that no
48       callbacks will take place.
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50       QUORUM_SET value means that one quorum algorithm is configured and that
51       callbacks will take place.
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53       When  a  configuration  change  occurs, the callback is called from the
54       quorum_dispatch() function.
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RETURN VALUE

57       This call returns the CS_OK value if successful, otherwise an error  is
58       returned.
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ERRORS

61       CS_ERR_TRY_AGAIN Resource temporarily unavailable
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63       CS_ERR_INVALID_PARAM Invalid argument
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65       CS_ERR_ACCESS Permission denied
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67       CS_ERR_LIBRARY The connection failed
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69       CS_ERR_INTERRUPT System call interrupted by a signal
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71       CS_ERR_NOT_SUPPORTED The requested protocol/functionality not supported
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73       CS_ERR_MESSAGE_ERROR Incorrect auth message received
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75       CS_ERR_NO_MEMORY Not enough memory to complete the requested task
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SEE ALSO

79       quorum_overview(3),   quorum_model_initialize(3),   quorum_finalize(3),
80       quorum_getquorate(3), quorum_trackstart(3),  quorum_trackstop(3),  quo‐
81       rum_fd_get(3),  quorum_dispatch(3),  quorum_context_set(3), quorum_con‐
82       text_get(3)
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84corosync Man Page                 2021-06-03              QUORUM_INITIALIZE(3)
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