4 * Copyright (c) 2003-2008 Fabrice Bellard
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 #include "qemu/osdep.h"
26 #include "qemu-common.h"
27 #include "qemu/module.h"
28 #include "qemu/sockets.h"
29 #include "qapi/error.h"
30 #include "chardev/char.h"
31 #include "io/channel-file.h"
33 #include "chardev/char-fd.h"
34 #include "chardev/char-io.h"
36 /* Called with chr_write_lock held. */
37 static int fd_chr_write(Chardev
*chr
, const uint8_t *buf
, int len
)
39 FDChardev
*s
= FD_CHARDEV(chr
);
41 return io_channel_send(s
->ioc_out
, buf
, len
);
44 static gboolean
fd_chr_read(QIOChannel
*chan
, GIOCondition cond
, void *opaque
)
46 Chardev
*chr
= CHARDEV(opaque
);
47 FDChardev
*s
= FD_CHARDEV(opaque
);
49 uint8_t buf
[CHR_READ_BUF_LEN
];
53 if (len
> s
->max_size
) {
60 ret
= qio_channel_read(
61 chan
, (gchar
*)buf
, len
, NULL
);
63 remove_fd_in_watch(chr
);
64 qemu_chr_be_event(chr
, CHR_EVENT_CLOSED
);
68 qemu_chr_be_write(chr
, buf
, ret
);
74 static int fd_chr_read_poll(void *opaque
)
76 Chardev
*chr
= CHARDEV(opaque
);
77 FDChardev
*s
= FD_CHARDEV(opaque
);
79 s
->max_size
= qemu_chr_be_can_write(chr
);
83 static GSource
*fd_chr_add_watch(Chardev
*chr
, GIOCondition cond
)
85 FDChardev
*s
= FD_CHARDEV(chr
);
86 return qio_channel_create_watch(s
->ioc_out
, cond
);
89 static void fd_chr_update_read_handler(Chardev
*chr
)
91 FDChardev
*s
= FD_CHARDEV(chr
);
93 remove_fd_in_watch(chr
);
95 chr
->gsource
= io_add_watch_poll(chr
, s
->ioc_in
,
102 static void char_fd_finalize(Object
*obj
)
104 Chardev
*chr
= CHARDEV(obj
);
105 FDChardev
*s
= FD_CHARDEV(obj
);
107 remove_fd_in_watch(chr
);
109 object_unref(OBJECT(s
->ioc_in
));
112 object_unref(OBJECT(s
->ioc_out
));
115 qemu_chr_be_event(chr
, CHR_EVENT_CLOSED
);
118 int qmp_chardev_open_file_source(char *src
, int flags
, Error
**errp
)
122 TFR(fd
= qemu_open(src
, flags
, 0666));
124 error_setg_file_open(errp
, errno
, src
);
129 /* open a character device to a unix fd */
130 void qemu_chr_open_fd(Chardev
*chr
,
131 int fd_in
, int fd_out
)
133 FDChardev
*s
= FD_CHARDEV(chr
);
136 s
->ioc_in
= QIO_CHANNEL(qio_channel_file_new_fd(fd_in
));
137 name
= g_strdup_printf("chardev-file-in-%s", chr
->label
);
138 qio_channel_set_name(QIO_CHANNEL(s
->ioc_in
), name
);
140 s
->ioc_out
= QIO_CHANNEL(qio_channel_file_new_fd(fd_out
));
141 name
= g_strdup_printf("chardev-file-out-%s", chr
->label
);
142 qio_channel_set_name(QIO_CHANNEL(s
->ioc_out
), name
);
144 qemu_set_nonblock(fd_out
);
147 static void char_fd_class_init(ObjectClass
*oc
, void *data
)
149 ChardevClass
*cc
= CHARDEV_CLASS(oc
);
151 cc
->chr_add_watch
= fd_chr_add_watch
;
152 cc
->chr_write
= fd_chr_write
;
153 cc
->chr_update_read_handler
= fd_chr_update_read_handler
;
156 static const TypeInfo char_fd_type_info
= {
157 .name
= TYPE_CHARDEV_FD
,
158 .parent
= TYPE_CHARDEV
,
159 .instance_size
= sizeof(FDChardev
),
160 .instance_finalize
= char_fd_finalize
,
161 .class_init
= char_fd_class_init
,
165 static void register_types(void)
167 type_register_static(&char_fd_type_info
);
170 type_init(register_types
);