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char: move fd chardev in its own file
Signed-off-by: Marc-André Lureau <[email protected]> Acked-by: Eric Blake <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,170 @@ | ||
| /* | ||
| * QEMU System Emulator | ||
| * | ||
| * Copyright (c) 2003-2008 Fabrice Bellard | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| * of this software and associated documentation files (the "Software"), to deal | ||
| * in the Software without restriction, including without limitation the rights | ||
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| * copies of the Software, and to permit persons to whom the Software is | ||
| * furnished to do so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included in | ||
| * all copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | ||
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
| * THE SOFTWARE. | ||
| */ | ||
| #include "qemu/osdep.h" | ||
| #include "qemu/sockets.h" | ||
| #include "qapi/error.h" | ||
| #include "qemu-common.h" | ||
| #include "sysemu/char.h" | ||
| #include "io/channel-file.h" | ||
|
|
||
| #include "char-fd.h" | ||
| #include "char-io.h" | ||
|
|
||
| /* Called with chr_write_lock held. */ | ||
| static int fd_chr_write(Chardev *chr, const uint8_t *buf, int len) | ||
| { | ||
| FDChardev *s = FD_CHARDEV(chr); | ||
|
|
||
| return io_channel_send(s->ioc_out, buf, len); | ||
| } | ||
|
|
||
| static gboolean fd_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque) | ||
| { | ||
| Chardev *chr = CHARDEV(opaque); | ||
| FDChardev *s = FD_CHARDEV(opaque); | ||
| int len; | ||
| uint8_t buf[CHR_READ_BUF_LEN]; | ||
| ssize_t ret; | ||
|
|
||
| len = sizeof(buf); | ||
| if (len > s->max_size) { | ||
| len = s->max_size; | ||
| } | ||
| if (len == 0) { | ||
| return TRUE; | ||
| } | ||
|
|
||
| ret = qio_channel_read( | ||
| chan, (gchar *)buf, len, NULL); | ||
| if (ret == 0) { | ||
| remove_fd_in_watch(chr); | ||
| qemu_chr_be_event(chr, CHR_EVENT_CLOSED); | ||
| return FALSE; | ||
| } | ||
| if (ret > 0) { | ||
| qemu_chr_be_write(chr, buf, ret); | ||
| } | ||
|
|
||
| return TRUE; | ||
| } | ||
|
|
||
| static int fd_chr_read_poll(void *opaque) | ||
| { | ||
| Chardev *chr = CHARDEV(opaque); | ||
| FDChardev *s = FD_CHARDEV(opaque); | ||
|
|
||
| s->max_size = qemu_chr_be_can_write(chr); | ||
| return s->max_size; | ||
| } | ||
|
|
||
| static GSource *fd_chr_add_watch(Chardev *chr, GIOCondition cond) | ||
| { | ||
| FDChardev *s = FD_CHARDEV(chr); | ||
| return qio_channel_create_watch(s->ioc_out, cond); | ||
| } | ||
|
|
||
| static void fd_chr_update_read_handler(Chardev *chr, | ||
| GMainContext *context) | ||
| { | ||
| FDChardev *s = FD_CHARDEV(chr); | ||
|
|
||
| remove_fd_in_watch(chr); | ||
| if (s->ioc_in) { | ||
| chr->fd_in_tag = io_add_watch_poll(chr, s->ioc_in, | ||
| fd_chr_read_poll, | ||
| fd_chr_read, chr, | ||
| context); | ||
| } | ||
| } | ||
|
|
||
| static void char_fd_finalize(Object *obj) | ||
| { | ||
| Chardev *chr = CHARDEV(obj); | ||
| FDChardev *s = FD_CHARDEV(obj); | ||
|
|
||
| remove_fd_in_watch(chr); | ||
| if (s->ioc_in) { | ||
| object_unref(OBJECT(s->ioc_in)); | ||
| } | ||
| if (s->ioc_out) { | ||
| object_unref(OBJECT(s->ioc_out)); | ||
| } | ||
|
|
||
| qemu_chr_be_event(chr, CHR_EVENT_CLOSED); | ||
| } | ||
|
|
||
| int qmp_chardev_open_file_source(char *src, int flags, Error **errp) | ||
| { | ||
| int fd = -1; | ||
|
|
||
| TFR(fd = qemu_open(src, flags, 0666)); | ||
| if (fd == -1) { | ||
| error_setg_file_open(errp, errno, src); | ||
| } | ||
| return fd; | ||
| } | ||
|
|
||
| /* open a character device to a unix fd */ | ||
| void qemu_chr_open_fd(Chardev *chr, | ||
| int fd_in, int fd_out) | ||
| { | ||
| FDChardev *s = FD_CHARDEV(chr); | ||
| char *name; | ||
|
|
||
| s->ioc_in = QIO_CHANNEL(qio_channel_file_new_fd(fd_in)); | ||
| name = g_strdup_printf("chardev-file-in-%s", chr->label); | ||
| qio_channel_set_name(QIO_CHANNEL(s->ioc_in), name); | ||
| g_free(name); | ||
| s->ioc_out = QIO_CHANNEL(qio_channel_file_new_fd(fd_out)); | ||
| name = g_strdup_printf("chardev-file-out-%s", chr->label); | ||
| qio_channel_set_name(QIO_CHANNEL(s->ioc_out), name); | ||
| g_free(name); | ||
| qemu_set_nonblock(fd_out); | ||
| s->chr = chr; | ||
| } | ||
|
|
||
| static void char_fd_class_init(ObjectClass *oc, void *data) | ||
| { | ||
| ChardevClass *cc = CHARDEV_CLASS(oc); | ||
|
|
||
| cc->chr_add_watch = fd_chr_add_watch; | ||
| cc->chr_write = fd_chr_write; | ||
| cc->chr_update_read_handler = fd_chr_update_read_handler; | ||
| } | ||
|
|
||
| static const TypeInfo char_fd_type_info = { | ||
| .name = TYPE_CHARDEV_FD, | ||
| .parent = TYPE_CHARDEV, | ||
| .instance_size = sizeof(FDChardev), | ||
| .instance_finalize = char_fd_finalize, | ||
| .class_init = char_fd_class_init, | ||
| .abstract = true, | ||
| }; | ||
|
|
||
| static void register_types(void) | ||
| { | ||
| type_register_static(&char_fd_type_info); | ||
| } | ||
|
|
||
| type_init(register_types); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,44 @@ | ||
| /* | ||
| * QEMU System Emulator | ||
| * | ||
| * Copyright (c) 2003-2008 Fabrice Bellard | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| * of this software and associated documentation files (the "Software"), to deal | ||
| * in the Software without restriction, including without limitation the rights | ||
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| * copies of the Software, and to permit persons to whom the Software is | ||
| * furnished to do so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included in | ||
| * all copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | ||
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
| * THE SOFTWARE. | ||
| */ | ||
| #ifndef CHAR_FD_H | ||
| #define CHAR_FD_H | ||
|
|
||
| #include "io/channel.h" | ||
| #include "sysemu/char.h" | ||
|
|
||
| typedef struct FDChardev { | ||
| Chardev parent; | ||
| Chardev *chr; | ||
| QIOChannel *ioc_in, *ioc_out; | ||
| int max_size; | ||
| } FDChardev; | ||
|
|
||
| #define TYPE_CHARDEV_FD "chardev-fd" | ||
|
|
||
| #define FD_CHARDEV(obj) OBJECT_CHECK(FDChardev, (obj), TYPE_CHARDEV_FD) | ||
|
|
||
| void qemu_chr_open_fd(Chardev *chr, int fd_in, int fd_out); | ||
| int qmp_chardev_open_file_source(char *src, int flags, Error **errp); | ||
|
|
||
| #endif /* CHAR_FD_H */ |
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