#define QEMU_CHAR_H
#include "qemu-common.h"
-#include "qemu/queue.h"
#include "qemu/option.h"
-#include "qemu/config-file.h"
-#include "block/aio.h"
-#include "qapi/qmp/qobject.h"
-#include "qapi/qmp/qstring.h"
#include "qemu/main-loop.h"
+#include "qemu/bitmap.h"
+#include "qom/object.h"
/* character device */
-#define CHR_EVENT_BREAK 0 /* serial break char */
-#define CHR_EVENT_FOCUS 1 /* focus to this terminal (modal input needed) */
-#define CHR_EVENT_OPENED 2 /* new connection established */
-#define CHR_EVENT_MUX_IN 3 /* mux-focus was set to this terminal */
-#define CHR_EVENT_MUX_OUT 4 /* mux-focus will move on */
-#define CHR_EVENT_CLOSED 5 /* connection closed */
+typedef enum {
+ CHR_EVENT_BREAK, /* serial break char */
+ CHR_EVENT_OPENED, /* new connection established */
+ CHR_EVENT_MUX_IN, /* mux-focus was set to this terminal */
+ CHR_EVENT_MUX_OUT, /* mux-focus will move on */
+ CHR_EVENT_CLOSED /* connection closed */
+} QEMUChrEvent;
+#define CHR_READ_BUF_LEN 4096
#define CHR_IOCTL_SERIAL_SET_PARAMS 1
typedef struct {
#define CHR_IOCTL_PP_EPP_WRITE 11
#define CHR_IOCTL_PP_DATA_DIR 12
+struct ParallelIOArg {
+ void *buffer;
+ int count;
+};
+
#define CHR_IOCTL_SERIAL_SET_TIOCM 13
#define CHR_IOCTL_SERIAL_GET_TIOCM 14
typedef void IOEventHandler(void *opaque, int event);
-struct CharDriverState {
- void (*init)(struct CharDriverState *s);
- int (*chr_write)(struct CharDriverState *s, const uint8_t *buf, int len);
- GSource *(*chr_add_watch)(struct CharDriverState *s, GIOCondition cond);
- void (*chr_update_read_handler)(struct CharDriverState *s);
- int (*chr_ioctl)(struct CharDriverState *s, int cmd, void *arg);
- int (*get_msgfd)(struct CharDriverState *s);
- int (*chr_add_client)(struct CharDriverState *chr, int fd);
+typedef enum {
+ /* Whether the chardev peer is able to close and
+ * reopen the data channel, thus requiring support
+ * for qemu_chr_wait_connected() to wait for a
+ * valid connection */
+ QEMU_CHAR_FEATURE_RECONNECTABLE,
+ /* Whether it is possible to send/recv file descriptors
+ * over the data channel */
+ QEMU_CHAR_FEATURE_FD_PASS,
+ /* Whether replay or record mode is enabled */
+ QEMU_CHAR_FEATURE_REPLAY,
+
+ QEMU_CHAR_FEATURE_LAST,
+} ChardevFeature;
+
+/* This is the backend as seen by frontend, the actual backend is
+ * Chardev */
+typedef struct CharBackend {
+ Chardev *chr;
IOEventHandler *chr_event;
IOCanReadHandler *chr_can_read;
IOReadHandler *chr_read;
- void *handler_opaque;
- void (*chr_close)(struct CharDriverState *chr);
- void (*chr_accept_input)(struct CharDriverState *chr);
- void (*chr_set_echo)(struct CharDriverState *chr, bool echo);
- void (*chr_set_fe_open)(struct CharDriverState *chr, int fe_open);
void *opaque;
+ int tag;
+ int fe_open;
+} CharBackend;
+
+struct Chardev {
+ Object parent_obj;
+
+ QemuMutex chr_write_lock;
+ CharBackend *be;
char *label;
char *filename;
+ int logfd;
int be_open;
- int fe_open;
- int explicit_fe_open;
- int explicit_be_open;
- int avail_connections;
- int is_mux;
guint fd_in_tag;
- QemuOpts *opts;
- QTAILQ_ENTRY(CharDriverState) next;
+ DECLARE_BITMAP(features, QEMU_CHAR_FEATURE_LAST);
+ QTAILQ_ENTRY(Chardev) next;
};
/**
* Create a new character backend from a QemuOpts list.
*
* @opts see qemu-config.c for a list of valid options
- * @init not sure..
*
* Returns: a new character backend
*/
-CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
- void (*init)(struct CharDriverState *s),
- Error **errp);
+Chardev *qemu_chr_new_from_opts(QemuOpts *opts,
+ Error **errp);
+
+/**
+ * @qemu_chr_parse_common:
+ *
+ * Parse the common options available to all character backends.
+ *
+ * @opts the options that still need parsing
+ * @backend a new backend
+ */
+void qemu_chr_parse_common(QemuOpts *opts, ChardevCommon *backend);
/**
* @qemu_chr_new:
*
* @label the name of the backend
* @filename the URI
- * @init not sure..
*
* Returns: a new character backend
*/
-CharDriverState *qemu_chr_new(const char *label, const char *filename,
- void (*init)(struct CharDriverState *s));
+Chardev *qemu_chr_new(const char *label, const char *filename);
+
+
+/**
+ * @qemu_chr_fe_disconnect:
+ *
+ * Close a fd accpeted by character backend.
+ * Without associated Chardev, do nothing.
+ */
+void qemu_chr_fe_disconnect(CharBackend *be);
+
+/**
+ * @qemu_chr_cleanup:
+ *
+ * Delete all chardevs (when leaving qemu)
+ */
+void qemu_chr_cleanup(void);
+
+/**
+ * @qemu_chr_fe_wait_connected:
+ *
+ * Wait for characted backend to be connected, return < 0 on error or
+ * if no assicated Chardev.
+ */
+int qemu_chr_fe_wait_connected(CharBackend *be, Error **errp);
+
+/**
+ * @qemu_chr_new_noreplay:
+ *
+ * Create a new character backend from a URI.
+ * Character device communications are not written
+ * into the replay log.
+ *
+ * @label the name of the backend
+ * @filename the URI
+ *
+ * Returns: a new character backend
+ */
+Chardev *qemu_chr_new_noreplay(const char *label, const char *filename);
/**
* @qemu_chr_delete:
*
- * Destroy a character backend.
+ * Destroy a character backend and remove it from the list of
+ * identified character backends.
*/
-void qemu_chr_delete(CharDriverState *chr);
+void qemu_chr_delete(Chardev *chr);
/**
* @qemu_chr_fe_set_echo:
* Ask the backend to override its normal echo setting. This only really
* applies to the stdio backend and is used by the QMP server such that you
* can see what you type if you try to type QMP commands.
+ * Without associated Chardev, do nothing.
*
* @echo true to enable echo, false to disable echo
*/
-void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo);
+void qemu_chr_fe_set_echo(CharBackend *be, bool echo);
/**
* @qemu_chr_fe_set_open:
*
* Set character frontend open status. This is an indication that the
* front end is ready (or not) to begin doing I/O.
+ * Without associated Chardev, do nothing.
*/
-void qemu_chr_fe_set_open(struct CharDriverState *chr, int fe_open);
+void qemu_chr_fe_set_open(CharBackend *be, int fe_open);
/**
* @qemu_chr_fe_printf:
*
- * Write to a character backend using a printf style interface.
+ * Write to a character backend using a printf style interface. This
+ * function is thread-safe. It does nothing without associated
+ * Chardev.
*
* @fmt see #printf
*/
-void qemu_chr_fe_printf(CharDriverState *s, const char *fmt, ...)
+void qemu_chr_fe_printf(CharBackend *be, const char *fmt, ...)
GCC_FMT_ATTR(2, 3);
-int qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond,
- GIOFunc func, void *user_data);
+/**
+ * @qemu_chr_fe_add_watch:
+ *
+ * If the backend is connected, create and add a #GSource that fires
+ * when the given condition (typically G_IO_OUT|G_IO_HUP or G_IO_HUP)
+ * is active; return the #GSource's tag. If it is disconnected,
+ * or without associated Chardev, return 0.
+ *
+ * @cond the condition to poll for
+ * @func the function to call when the condition happens
+ * @user_data the opaque pointer to pass to @func
+ *
+ * Returns: the source tag
+ */
+guint qemu_chr_fe_add_watch(CharBackend *be, GIOCondition cond,
+ GIOFunc func, void *user_data);
/**
* @qemu_chr_fe_write:
*
- * Write data to a character backend from the front end. This function will
- * send data from the front end to the back end.
+ * Write data to a character backend from the front end. This function
+ * will send data from the front end to the back end. This function
+ * is thread-safe.
*
* @buf the data
* @len the number of bytes to send
*
- * Returns: the number of bytes consumed
+ * Returns: the number of bytes consumed (0 if no assicated Chardev)
*/
-int qemu_chr_fe_write(CharDriverState *s, const uint8_t *buf, int len);
+int qemu_chr_fe_write(CharBackend *be, const uint8_t *buf, int len);
/**
* @qemu_chr_fe_write_all:
* Write data to a character backend from the front end. This function will
* send data from the front end to the back end. Unlike @qemu_chr_fe_write,
* this function will block if the back end cannot consume all of the data
- * attempted to be written.
+ * attempted to be written. This function is thread-safe.
*
* @buf the data
* @len the number of bytes to send
*
- * Returns: the number of bytes consumed
+ * Returns: the number of bytes consumed (0 if no assicated Chardev)
+ */
+int qemu_chr_fe_write_all(CharBackend *be, const uint8_t *buf, int len);
+
+/**
+ * @qemu_chr_fe_read_all:
+ *
+ * Read data to a buffer from the back end.
+ *
+ * @buf the data buffer
+ * @len the number of bytes to read
+ *
+ * Returns: the number of bytes read (0 if no assicated Chardev)
*/
-int qemu_chr_fe_write_all(CharDriverState *s, const uint8_t *buf, int len);
+int qemu_chr_fe_read_all(CharBackend *be, uint8_t *buf, int len);
/**
* @qemu_chr_fe_ioctl:
*
- * Issue a device specific ioctl to a backend.
+ * Issue a device specific ioctl to a backend. This function is thread-safe.
*
* @cmd see CHR_IOCTL_*
* @arg the data associated with @cmd
*
- * Returns: if @cmd is not supported by the backend, -ENOTSUP, otherwise the
- * return value depends on the semantics of @cmd
+ * Returns: if @cmd is not supported by the backend or there is no
+ * associated Chardev, -ENOTSUP, otherwise the return
+ * value depends on the semantics of @cmd
*/
-int qemu_chr_fe_ioctl(CharDriverState *s, int cmd, void *arg);
+int qemu_chr_fe_ioctl(CharBackend *be, int cmd, void *arg);
/**
* @qemu_chr_fe_get_msgfd:
* this function will return -1 until a client sends a new file
* descriptor.
*/
-int qemu_chr_fe_get_msgfd(CharDriverState *s);
+int qemu_chr_fe_get_msgfd(CharBackend *be);
/**
- * @qemu_chr_fe_claim:
+ * @qemu_chr_fe_get_msgfds:
*
- * Claim a backend before using it, should be called before calling
- * qemu_chr_add_handlers().
+ * For backends capable of fd passing, return the number of file received
+ * descriptors and fills the fds array up to num elements
*
- * Returns: -1 if the backend is already in use by another frontend, 0 on
- * success.
+ * Returns: -1 if fd passing isn't supported or there are no pending file
+ * descriptors. If file descriptors are returned, subsequent calls to
+ * this function will return -1 until a client sends a new set of file
+ * descriptors.
*/
-int qemu_chr_fe_claim(CharDriverState *s);
+int qemu_chr_fe_get_msgfds(CharBackend *be, int *fds, int num);
/**
- * @qemu_chr_fe_claim_no_fail:
+ * @qemu_chr_fe_set_msgfds:
*
- * Like qemu_chr_fe_claim, but will exit qemu with an error when the
- * backend is already in use.
- */
-void qemu_chr_fe_claim_no_fail(CharDriverState *s);
-
-/**
- * @qemu_chr_fe_claim:
+ * For backends capable of fd passing, set an array of fds to be passed with
+ * the next send operation.
+ * A subsequent call to this function before calling a write function will
+ * result in overwriting the fd array with the new value without being send.
+ * Upon writing the message the fd array is freed.
*
- * Release a backend for use by another frontend.
- *
- * Returns: -1 if the backend is already in use by another frontend, 0 on
- * success.
+ * Returns: -1 if fd passing isn't supported or no associated Chardev.
*/
-void qemu_chr_fe_release(CharDriverState *s);
+int qemu_chr_fe_set_msgfds(CharBackend *be, int *fds, int num);
/**
* @qemu_chr_be_can_write:
*
* Returns: the number of bytes the front end can receive via @qemu_chr_be_write
*/
-int qemu_chr_be_can_write(CharDriverState *s);
+int qemu_chr_be_can_write(Chardev *s);
/**
* @qemu_chr_be_write:
* @buf a buffer to receive data from the front end
* @len the number of bytes to receive from the front end
*/
-void qemu_chr_be_write(CharDriverState *s, uint8_t *buf, int len);
+void qemu_chr_be_write(Chardev *s, uint8_t *buf, int len);
+/**
+ * @qemu_chr_be_write_impl:
+ *
+ * Implementation of back end writing. Used by replay module.
+ *
+ * @buf a buffer to receive data from the front end
+ * @len the number of bytes to receive from the front end
+ */
+void qemu_chr_be_write_impl(Chardev *s, uint8_t *buf, int len);
/**
* @qemu_chr_be_event:
*
* @event the event to send
*/
-void qemu_chr_be_event(CharDriverState *s, int event);
+void qemu_chr_be_event(Chardev *s, int event);
-void qemu_chr_add_handlers(CharDriverState *s,
- IOCanReadHandler *fd_can_read,
- IOReadHandler *fd_read,
- IOEventHandler *fd_event,
- void *opaque);
+/**
+ * @qemu_chr_fe_init:
+ *
+ * Initializes a front end for the given CharBackend and
+ * Chardev. Call qemu_chr_fe_deinit() to remove the association and
+ * release the driver.
+ *
+ * Returns: false on error.
+ */
+bool qemu_chr_fe_init(CharBackend *b, Chardev *s, Error **errp);
-void qemu_chr_be_generic_open(CharDriverState *s);
-void qemu_chr_accept_input(CharDriverState *s);
-int qemu_chr_add_client(CharDriverState *s, int fd);
-void qemu_chr_info_print(Monitor *mon, const QObject *ret_data);
-void qemu_chr_info(Monitor *mon, QObject **ret_data);
-CharDriverState *qemu_chr_find(const char *name);
+/**
+ * @qemu_chr_fe_get_driver:
+ *
+ * Returns the driver associated with a CharBackend or NULL if no
+ * associated Chardev.
+ */
+Chardev *qemu_chr_fe_get_driver(CharBackend *be);
-QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename);
+/**
+ * @qemu_chr_fe_deinit:
+ *
+ * Dissociate the CharBackend from the Chardev.
+ *
+ * Safe to call without associated Chardev.
+ */
+void qemu_chr_fe_deinit(CharBackend *b);
-void register_char_driver(const char *name, CharDriverState *(*open)(QemuOpts *));
-void register_char_driver_qapi(const char *name, ChardevBackendKind kind,
- void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp));
+/**
+ * @qemu_chr_fe_set_handlers:
+ * @b: a CharBackend
+ * @fd_can_read: callback to get the amount of data the frontend may
+ * receive
+ * @fd_read: callback to receive data from char
+ * @fd_event: event callback
+ * @opaque: an opaque pointer for the callbacks
+ * @context: a main loop context or NULL for the default
+ * @set_open: whether to call qemu_chr_fe_set_open() implicitely when
+ * any of the handler is non-NULL
+ *
+ * Set the front end char handlers. The front end takes the focus if
+ * any of the handler is non-NULL.
+ *
+ * Without associated Chardev, nothing is changed.
+ */
+void qemu_chr_fe_set_handlers(CharBackend *b,
+ IOCanReadHandler *fd_can_read,
+ IOReadHandler *fd_read,
+ IOEventHandler *fd_event,
+ void *opaque,
+ GMainContext *context,
+ bool set_open);
-/* add an eventfd to the qemu devices that are polled */
-CharDriverState *qemu_chr_open_eventfd(int eventfd);
+/**
+ * @qemu_chr_fe_take_focus:
+ *
+ * Take the focus (if the front end is muxed).
+ *
+ * Without associated Chardev, nothing is changed.
+ */
+void qemu_chr_fe_take_focus(CharBackend *b);
-extern int term_escape_char;
+void qemu_chr_be_generic_open(Chardev *s);
+void qemu_chr_fe_accept_input(CharBackend *be);
+int qemu_chr_add_client(Chardev *s, int fd);
+Chardev *qemu_chr_find(const char *name);
-CharDriverState *qemu_char_get_next_serial(void);
+bool qemu_chr_has_feature(Chardev *chr,
+ ChardevFeature feature);
+void qemu_chr_set_feature(Chardev *chr,
+ ChardevFeature feature);
+QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename);
+int qemu_chr_write_all(Chardev *s, const uint8_t *buf, int len);
+int qemu_chr_wait_connected(Chardev *chr, Error **errp);
+
+#define TYPE_CHARDEV "chardev"
+#define CHARDEV(obj) OBJECT_CHECK(Chardev, (obj), TYPE_CHARDEV)
+#define CHARDEV_CLASS(klass) \
+ OBJECT_CLASS_CHECK(ChardevClass, (klass), TYPE_CHARDEV)
+#define CHARDEV_GET_CLASS(obj) \
+ OBJECT_GET_CLASS(ChardevClass, (obj), TYPE_CHARDEV)
+
+#define TYPE_CHARDEV_NULL "chardev-null"
+#define TYPE_CHARDEV_MUX "chardev-mux"
+#define TYPE_CHARDEV_RINGBUF "chardev-ringbuf"
+#define TYPE_CHARDEV_PTY "chardev-pty"
+#define TYPE_CHARDEV_CONSOLE "chardev-console"
+#define TYPE_CHARDEV_STDIO "chardev-stdio"
+#define TYPE_CHARDEV_PIPE "chardev-pipe"
+#define TYPE_CHARDEV_MEMORY "chardev-memory"
+#define TYPE_CHARDEV_PARALLEL "chardev-parallel"
+#define TYPE_CHARDEV_FILE "chardev-file"
+#define TYPE_CHARDEV_SERIAL "chardev-serial"
+#define TYPE_CHARDEV_SOCKET "chardev-socket"
+#define TYPE_CHARDEV_UDP "chardev-udp"
+
+#define CHARDEV_IS_RINGBUF(chr) \
+ object_dynamic_cast(OBJECT(chr), TYPE_CHARDEV_RINGBUF)
+#define CHARDEV_IS_PTY(chr) \
+ object_dynamic_cast(OBJECT(chr), TYPE_CHARDEV_PTY)
+
+typedef struct ChardevClass {
+ ObjectClass parent_class;
+
+ bool internal; /* TODO: eventually use TYPE_USER_CREATABLE */
+ void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp);
+
+ void (*open)(Chardev *chr, ChardevBackend *backend,
+ bool *be_opened, Error **errp);
+
+ int (*chr_write)(Chardev *s, const uint8_t *buf, int len);
+ int (*chr_sync_read)(Chardev *s, const uint8_t *buf, int len);
+ GSource *(*chr_add_watch)(Chardev *s, GIOCondition cond);
+ void (*chr_update_read_handler)(Chardev *s, GMainContext *context);
+ int (*chr_ioctl)(Chardev *s, int cmd, void *arg);
+ int (*get_msgfds)(Chardev *s, int* fds, int num);
+ int (*set_msgfds)(Chardev *s, int *fds, int num);
+ int (*chr_add_client)(Chardev *chr, int fd);
+ int (*chr_wait_connected)(Chardev *chr, Error **errp);
+ void (*chr_disconnect)(Chardev *chr);
+ void (*chr_accept_input)(Chardev *chr);
+ void (*chr_set_echo)(Chardev *chr, bool echo);
+ void (*chr_set_fe_open)(Chardev *chr, int fe_open);
+} ChardevClass;
+
+Chardev *qemu_chardev_new(const char *id, const char *typename,
+ ChardevBackend *backend, Error **errp);
-/* msmouse */
-CharDriverState *qemu_chr_open_msmouse(void);
+extern int term_escape_char;
-/* baum.c */
-CharDriverState *chr_baum_init(void);
+/* console.c */
+void qemu_chr_parse_vc(QemuOpts *opts, ChardevBackend *backend, Error **errp);
#endif
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