95c6bff356
This patchset enables the core of the quorum mechanism. The num_children reads are compared to get the majority version and if this version exists more than threshold times the guest won't see the error at all. If a block is corrupted or if an error occurs during an IO or if the quorum cannot be established QMP events are used to report to the management. Use gnutls's SHA-256 to compare versions. --enable-quorum must be used to enable the feature. Signed-off-by: Benoit Canet <benoit@irqsave.net> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
111 lines
3.5 KiB
C
111 lines
3.5 KiB
C
#ifndef MONITOR_H
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#define MONITOR_H
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#include "qemu-common.h"
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#include "qapi/qmp/qerror.h"
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#include "qapi/qmp/qdict.h"
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#include "block/block.h"
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#include "qemu/readline.h"
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extern Monitor *cur_mon;
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extern Monitor *default_mon;
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/* flags for monitor_init */
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#define MONITOR_IS_DEFAULT 0x01
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#define MONITOR_USE_READLINE 0x02
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#define MONITOR_USE_CONTROL 0x04
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#define MONITOR_USE_PRETTY 0x08
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/* flags for monitor commands */
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#define MONITOR_CMD_ASYNC 0x0001
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/* QMP events */
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typedef enum MonitorEvent {
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QEVENT_SHUTDOWN,
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QEVENT_RESET,
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QEVENT_POWERDOWN,
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QEVENT_STOP,
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QEVENT_RESUME,
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QEVENT_VNC_CONNECTED,
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QEVENT_VNC_INITIALIZED,
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QEVENT_VNC_DISCONNECTED,
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QEVENT_BLOCK_IO_ERROR,
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QEVENT_RTC_CHANGE,
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QEVENT_WATCHDOG,
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QEVENT_SPICE_CONNECTED,
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QEVENT_SPICE_INITIALIZED,
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QEVENT_SPICE_DISCONNECTED,
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QEVENT_BLOCK_JOB_COMPLETED,
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QEVENT_BLOCK_JOB_CANCELLED,
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QEVENT_BLOCK_JOB_ERROR,
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QEVENT_BLOCK_JOB_READY,
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QEVENT_DEVICE_DELETED,
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QEVENT_DEVICE_TRAY_MOVED,
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QEVENT_NIC_RX_FILTER_CHANGED,
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QEVENT_SUSPEND,
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QEVENT_SUSPEND_DISK,
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QEVENT_WAKEUP,
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QEVENT_BALLOON_CHANGE,
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QEVENT_SPICE_MIGRATE_COMPLETED,
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QEVENT_GUEST_PANICKED,
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QEVENT_BLOCK_IMAGE_CORRUPTED,
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QEVENT_QUORUM_FAILURE,
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QEVENT_QUORUM_REPORT_BAD,
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/* Add to 'monitor_event_names' array in monitor.c when
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* defining new events here */
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QEVENT_MAX,
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} MonitorEvent;
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int monitor_cur_is_qmp(void);
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void monitor_protocol_event(MonitorEvent event, QObject *data);
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void monitor_init(CharDriverState *chr, int flags);
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int monitor_suspend(Monitor *mon);
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void monitor_resume(Monitor *mon);
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int monitor_read_bdrv_key_start(Monitor *mon, BlockDriverState *bs,
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BlockDriverCompletionFunc *completion_cb,
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void *opaque);
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int monitor_read_block_device_key(Monitor *mon, const char *device,
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BlockDriverCompletionFunc *completion_cb,
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void *opaque);
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int monitor_get_fd(Monitor *mon, const char *fdname, Error **errp);
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int monitor_handle_fd_param(Monitor *mon, const char *fdname);
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void monitor_vprintf(Monitor *mon, const char *fmt, va_list ap)
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GCC_FMT_ATTR(2, 0);
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void monitor_printf(Monitor *mon, const char *fmt, ...) GCC_FMT_ATTR(2, 3);
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void monitor_print_filename(Monitor *mon, const char *filename);
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void monitor_flush(Monitor *mon);
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int monitor_set_cpu(int cpu_index);
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int monitor_get_cpu_index(void);
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typedef void (MonitorCompletion)(void *opaque, QObject *ret_data);
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void monitor_set_error(Monitor *mon, QError *qerror);
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void monitor_read_command(Monitor *mon, int show_prompt);
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ReadLineState *monitor_get_rs(Monitor *mon);
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int monitor_read_password(Monitor *mon, ReadLineFunc *readline_func,
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void *opaque);
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int qmp_qom_set(Monitor *mon, const QDict *qdict, QObject **ret);
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int qmp_qom_get(Monitor *mon, const QDict *qdict, QObject **ret);
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int qmp_object_add(Monitor *mon, const QDict *qdict, QObject **ret);
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void object_add(const char *type, const char *id, const QDict *qdict,
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Visitor *v, Error **errp);
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AddfdInfo *monitor_fdset_add_fd(int fd, bool has_fdset_id, int64_t fdset_id,
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bool has_opaque, const char *opaque,
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Error **errp);
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int monitor_fdset_get_fd(int64_t fdset_id, int flags);
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int monitor_fdset_dup_fd_add(int64_t fdset_id, int dup_fd);
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int monitor_fdset_dup_fd_remove(int dup_fd);
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int monitor_fdset_dup_fd_find(int dup_fd);
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#endif /* !MONITOR_H */
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