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votequorum_qdevice_master_wins(3) [centos man page]

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

NAME
votequorum_qdevice_master_wins - Sets or clears quorum device master_wins flag SYNOPSIS
#include <corosync/votequorum.h> int votequorum_qdevice_master_wins(votequorum_handle_t handle const char name, unsigned int allow); DESCRIPTION
The votequorum_qdevice_master_wins informs votequorum whether or not the currently registered qdevice subsystem supports 'master_wins' mode (default 0). This mode allows the qdevice to effectively take over the quorum calculations of votequorum. Any node with an active qdevice that also has master_wins set becomes quorate regardless of the node votes of the cluster. It is left up to the qdevice subsystem itself (not part of votequorum) to communicate across the nodes or otherwise provide some system of deciding which nodes will be part of the quo- rate cluster, if any. eg They may be the set of nodes that has access to a quorum disk. name The name of the currently registered quorum device on this node. This must match the existing name known to votequorum. allow 0 (the default) means that master_wins is not active on this node. 1 means that master_wins is active on this node. 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_initialize(3), votequorum_finalize(3), votequorum_getinfo(3), votequorum_trackstart(3), votequo- rum_trackstop(3), votequorum_fd_get(3), votequorum_dispatch(3), votequorum_context_set(3), votequorum_context_get(3), votequorum_setex- pected(3), votequorum_setvotes(3), votequorum_qdevice_register(3), votequorum_qdevice_poll(3), votequorum_qdevice_update(3), corosync Man Page 2014-06-10 VOTEQUORUM_QDEVICE_MASTER_WINS(3)

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

NAME
quorum_initialize - Create a new connection to the Quorum service SYNOPSIS
#include <corosync/quorum.h> int quorum_initialize(quorum_handle_t *handle, quorum_callbacks_t *callbacks, uint32_t *quorum_type); DESCRIPTION
The quorum_initialize function is used to initialize a connection to the quorum API. Each application may have several connections to the quorum 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 quorum service. Every time the voting configuraton changes (eg a node joins or leave the cluster) or the quorum status change, the callback is called. The callback function is described by the following type definitions: typedef void (*quorum_notification_fn_t) ( quorum_handle_t handle, uint32_t quorate, uint64_t ring_seq, uint32_t view_list_entries, uint32_t *view_list ); The callbacks argument is of the type: typedef struct { quorum_notification_fn_t quorum_notify_fn; } quorum_callbacks_t; The quorum_type argument is set to: #define QUORUM_FREE 0 #define QUORUM_SET 1 QUORUM_FREE value means that no quorum algorithm is loaded and that no callbacks will take place. QUORUM_SET value means that one quorum algorithm is configured and that callbacks will take place. When a configuration change occurs, the callback is called from the quorum_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
quorum_overview(8), quorum_finalize(3), quorum_getquorate(3), quorum_trackstart(3), quorum_trackstop(3), quorum_fd_get(3), quorum_dis- patch(3), quorum_context_set(3), quorum_context_get(3) corosync Man Page 2014-06-10 QUORUM_INITIALIZE(3)
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