e69ee454b5
This way, a monitor command handler will still be able to access the current monitor, but when it yields, all other code code will correctly get NULL from monitor_cur(). This uses a hash table to map the coroutine pointer to the current monitor of that coroutine. Outside of coroutine context, we associate the current monitor with the leader coroutine of the current thread. Approaches to implement some form of coroutine local storage directly in the coroutine core code have been considered and discarded because they didn't end up being much more generic than the hash table and their performance impact on coroutines not using coroutine local storage was unclear. As the block layer uses a coroutine per I/O request, this is a fast path and we have to be careful. It's safest to just stay out of this path with code only used by the monitor. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20201005155855.256490-8-kwolf@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
52 lines
1.8 KiB
C
52 lines
1.8 KiB
C
#ifndef MONITOR_H
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#define MONITOR_H
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#include "block/block.h"
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#include "qapi/qapi-types-misc.h"
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#include "qemu/readline.h"
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typedef struct MonitorHMP MonitorHMP;
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typedef struct MonitorOptions MonitorOptions;
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#define QMP_REQ_QUEUE_LEN_MAX 8
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extern QemuOptsList qemu_mon_opts;
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Monitor *monitor_cur(void);
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Monitor *monitor_set_cur(Coroutine *co, Monitor *mon);
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bool monitor_cur_is_qmp(void);
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void monitor_init_globals(void);
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void monitor_init_globals_core(void);
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void monitor_init_qmp(Chardev *chr, bool pretty, Error **errp);
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void monitor_init_hmp(Chardev *chr, bool use_readline, Error **errp);
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int monitor_init(MonitorOptions *opts, bool allow_hmp, Error **errp);
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int monitor_init_opts(QemuOpts *opts, Error **errp);
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void monitor_cleanup(void);
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int monitor_suspend(Monitor *mon);
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void monitor_resume(Monitor *mon);
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int monitor_get_fd(Monitor *mon, const char *fdname, Error **errp);
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int monitor_fd_param(Monitor *mon, const char *fdname, Error **errp);
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int monitor_vprintf(Monitor *mon, const char *fmt, va_list ap)
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GCC_FMT_ATTR(2, 0);
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int monitor_printf(Monitor *mon, const char *fmt, ...) GCC_FMT_ATTR(2, 3);
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void monitor_flush(Monitor *mon);
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int monitor_set_cpu(Monitor *mon, int cpu_index);
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int monitor_get_cpu_index(Monitor *mon);
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void monitor_read_command(MonitorHMP *mon, int show_prompt);
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int monitor_read_password(MonitorHMP *mon, ReadLineFunc *readline_func,
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void *opaque);
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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_dup_fd_add(int64_t fdset_id, int flags);
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void monitor_fdset_dup_fd_remove(int dup_fd);
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int64_t monitor_fdset_dup_fd_find(int dup_fd);
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#endif /* MONITOR_H */
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