mirror of
https://github.com/qemu/qemu.git
synced 2024-12-04 17:23:39 +08:00
0587568780
The way we get QMP commands registered is high tech:
* qapi-commands.py generates qmp_init_marshal() that does the actual work
* it also generates the magic to register it as a MODULE_INIT_QAPI
function, so it runs when someone calls
module_call_init(MODULE_INIT_QAPI)
* main() calls module_call_init()
QEMU needs to register a few non-qapified commands. Same high tech
works: monitor.c has its own qmp_init_marshal() along with the magic
to make it run in module_call_init(MODULE_INIT_QAPI).
QEMU also needs to unregister commands that are not wanted in this
build's configuration (commit 5032a16). Simple enough:
qmp_unregister_commands_hack(). The difficulty is to make it run
after the generated qmp_init_marshal(). We can't simply run it in
monitor.c's qmp_init_marshal(), because the order in which the
registered functions run is indeterminate. So qmp_init_marshal()
registers qmp_unregister_commands_hack() separately. Since
registering *appends* to the list of registered functions, this will
make it run after all the functions that have been registered already.
I suspect it takes a long and expensive computer science education to
not find this silly.
Dumb it down as follows:
* Drop MODULE_INIT_QAPI entirely
* Give the generated qmp_init_marshal() external linkage.
* Call it instead of module_call_init(MODULE_INIT_QAPI)
* Except in QEMU proper, call new monitor_init_qmp_commands() that in
turn calls the generated qmp_init_marshal(), registers the
additional commands and unregisters the unwanted ones.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <1488544368-30622-5-git-send-email-armbru@redhat.com>
57 lines
1.9 KiB
C
57 lines
1.9 KiB
C
#ifndef MONITOR_H
|
|
#define MONITOR_H
|
|
|
|
#include "qemu-common.h"
|
|
#include "qapi/qmp/qdict.h"
|
|
#include "block/block.h"
|
|
#include "qemu/readline.h"
|
|
|
|
extern Monitor *cur_mon;
|
|
|
|
/* flags for monitor_init */
|
|
/* 0x01 unused */
|
|
#define MONITOR_USE_READLINE 0x02
|
|
#define MONITOR_USE_CONTROL 0x04
|
|
#define MONITOR_USE_PRETTY 0x08
|
|
|
|
bool monitor_cur_is_qmp(void);
|
|
|
|
void monitor_init_qmp_commands(void);
|
|
void monitor_init(Chardev *chr, int flags);
|
|
void monitor_cleanup(void);
|
|
|
|
int monitor_suspend(Monitor *mon);
|
|
void monitor_resume(Monitor *mon);
|
|
|
|
int monitor_read_bdrv_key_start(Monitor *mon, BlockDriverState *bs,
|
|
BlockCompletionFunc *completion_cb,
|
|
void *opaque);
|
|
int monitor_read_block_device_key(Monitor *mon, const char *device,
|
|
BlockCompletionFunc *completion_cb,
|
|
void *opaque);
|
|
|
|
int monitor_get_fd(Monitor *mon, const char *fdname, Error **errp);
|
|
int monitor_fd_param(Monitor *mon, const char *fdname, Error **errp);
|
|
|
|
void monitor_vprintf(Monitor *mon, const char *fmt, va_list ap)
|
|
GCC_FMT_ATTR(2, 0);
|
|
void monitor_printf(Monitor *mon, const char *fmt, ...) GCC_FMT_ATTR(2, 3);
|
|
int monitor_fprintf(FILE *stream, const char *fmt, ...) GCC_FMT_ATTR(2, 3);
|
|
void monitor_flush(Monitor *mon);
|
|
int monitor_set_cpu(int cpu_index);
|
|
int monitor_get_cpu_index(void);
|
|
|
|
void monitor_read_command(Monitor *mon, int show_prompt);
|
|
int monitor_read_password(Monitor *mon, ReadLineFunc *readline_func,
|
|
void *opaque);
|
|
|
|
AddfdInfo *monitor_fdset_add_fd(int fd, bool has_fdset_id, int64_t fdset_id,
|
|
bool has_opaque, const char *opaque,
|
|
Error **errp);
|
|
int monitor_fdset_get_fd(int64_t fdset_id, int flags);
|
|
int monitor_fdset_dup_fd_add(int64_t fdset_id, int dup_fd);
|
|
void monitor_fdset_dup_fd_remove(int dup_fd);
|
|
int monitor_fdset_dup_fd_find(int dup_fd);
|
|
|
|
#endif /* MONITOR_H */
|