This patch adds chardev_add and chardev_del monitor commands.
chardev_del is pretty straight forward, it just takes an id argument and
zaps the chardev specified.
chardev_add is more tricky as there are tons of arguments for the
different backends. The hmp version limited to the most common use
cases, especially when it comes to sockets: You can only specify port
(tcp) or path (unix) and qemu will create a listening socket. For
example this ...
(qemu) chardev_add foo socket 42
... will do the same as ...
-chardev socket,id=foo,port=42,server,nowait
on the qemu command line.
The qmp version has full support for everything the -chardev command
line switch can handle. The implementation is pretty straight
forward: It just puts all arguments it got into a QemuOpts, then goes
call qemu_chr_new_from_opts().
Signed-off-by: Gerd Hoffmann <kra...@redhat.com>
---
hmp-commands.hx | 32 ++++++++++++++++++++++++++++
hmp.c | 31 +++++++++++++++++++++++++++
hmp.h | 2 +
qapi-schema.json | 39 ++++++++++++++++++++++++++++++++++
qemu-char.c | 50 +++++++++++++++++++++++++++++++++++++++++++-
qemu-char.h | 2 +
qmp-commands.hx | 61 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
7 files changed, 216 insertions(+), 1 deletions(-)
diff --git a/hmp-commands.hx b/hmp-commands.hx
index e0b537d..48504d1 100644
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -1404,6 +1404,38 @@ passed since 1970, i.e. unix epoch.
ETEXI
{
+ .name = "chardev_add",
+ .args_type = "args:s",
+ .params = "args",
+ .help = "add chardev",
+ .mhandler.cmd = hmp_chardev_add,
+ },
+
+STEXI
+@item chardev_add args
+@findex chardev_add
+
+chardev_add accepts the same parameters as the -chardev command line switch.
+
+ETEXI
+
+ {
+ .name = "chardev_del",
+ .args_type = "id:s",
+ .params = "id",
+ .help = "del chardev",
+ .mhandler.cmd = hmp_chardev_del,
+ },
+
+STEXI
+@item chardev_del id
+@findex chardev_del
+
+Removes the chardev @var{id}.
+
+ETEXI
+
+ {
.name = "info",
.args_type = "item:s?",
.params = "[subcommand]",
diff --git a/hmp.c b/hmp.c
index 70bdec2..b494d05 100644
--- a/hmp.c
+++ b/hmp.c
@@ -1209,3 +1209,34 @@ void hmp_screen_dump(Monitor *mon, const QDict *qdict)
qmp_screendump(filename, &err);
hmp_handle_error(mon, &err);
}
+
+void hmp_chardev_add(Monitor *mon, const QDict *qdict)
+{
+ const char *args = qdict_get_str(qdict, "args");
+ CharDriverState *chr;
+ Error *err = NULL;
+ QemuOpts *opts;
+
+ opts = qemu_opts_parse(qemu_find_opts("chardev"), args, 1);
+ if (opts == NULL) {
+ error_setg(&err, "Parsing chardev args failed\n");
+ goto out;
+ }
+
+ chr = qemu_chr_new_from_opts(opts, NULL);
+ if (chr == NULL) {
+ qemu_opts_del(opts);
+ error_setg(&err, "Creating chardev failed\n");
+ }
+
+out:
+ hmp_handle_error(mon, &err);
+}
+
+void hmp_chardev_del(Monitor *mon, const QDict *qdict)
+{
+ Error *err = NULL;
+ qmp_chardev_del(qdict_get_str(qdict, "id"),
+ &err);
+ hmp_handle_error(mon, &err);
+}
diff --git a/hmp.h b/hmp.h
index 71ea384..080afaa 100644
--- a/hmp.h
+++ b/hmp.h
@@ -75,5 +75,7 @@ void hmp_getfd(Monitor *mon, const QDict *qdict);
void hmp_closefd(Monitor *mon, const QDict *qdict);
void hmp_send_key(Monitor *mon, const QDict *qdict);
void hmp_screen_dump(Monitor *mon, const QDict *qdict);
+void hmp_chardev_add(Monitor *mon, const QDict *qdict);
+void hmp_chardev_del(Monitor *mon, const QDict *qdict);
#endif
diff --git a/qapi-schema.json b/qapi-schema.json
index f9dbdae..550e4c7 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -2796,3 +2796,42 @@
# Since: 0.14.0
##
{ 'command': 'screendump', 'data': {'filename': 'str'} }
+
+##
+# @chardev_add:
+#
+# Add a chardev
+#
+# @id: the chardev's ID, must be unique
+# @backend: the chardev backend: "file", "socket", ...
+# @path: file / device / unix socket path
+# @name: spice channel name
+# @host: host name
+# @port: port number
+# @server: create socket in server mode
+# @wait: wait for connect
+# @ipv4: force ipv4-only
+# @ipv6: force ipv6-only
+# @telnet: telnet negotiation
+#
+# Returns: Nothing on success
+#
+# Since: 1.3.0
+##
+{ 'command': 'chardev_add', 'data': {'id' : 'str',
+ 'backend' : 'str',
+ '*props' : '**' },
+ 'gen': 'no' }
+
+##
+# @chardev_del:
+#
+# Remove a chardev
+#
+# @id: the chardev's ID, must exist and not be in use
+#
+# Returns: Nothing on success
+#
+# Since: 1.3.0
+##
+{ 'command': 'chardev_del', 'data': {'id': 'str'} }
diff --git a/qemu-char.c b/qemu-char.c
index b082bae..7bbc490 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -2805,6 +2805,7 @@ CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
chr->avail_connections = 1;
}
chr->label = g_strdup(qemu_opts_id(opts));
+ chr->opts = opts;
return chr;
}
@@ -2826,7 +2827,6 @@ CharDriverState *qemu_chr_new(const char *label, const
char *filename, void (*in
if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
monitor_init(chr, MONITOR_USE_READLINE);
}
- qemu_opts_del(opts);
return chr;
}
@@ -2856,6 +2856,7 @@ void qemu_chr_delete(CharDriverState *chr)
QTAILQ_REMOVE(&chardevs, chr, next);
if (chr->chr_close)
chr->chr_close(chr);
+ qemu_opts_del(chr->opts);
g_free(chr->filename);
g_free(chr->label);
g_free(chr);
@@ -2900,3 +2901,50 @@ CharDriverState *qemu_char_get_next_serial(void)
return serial_hds[next_serial++];
}
+int qmp_chardev_add(Monitor *mon, const QDict *qdict, QObject **ret)
+{
+ CharDriverState *chr;
+ Error *err = NULL;
+ QemuOptsList *opts_list;
+ QemuOpts *opts;
+
+ opts_list = qemu_find_opts_err("chardev", &err);
+ if (error_is_set(&err)) {
+ goto exit_err;
+ }
+
+ opts = qemu_opts_from_qdict(opts_list, qdict, &err);
+ if (error_is_set(&err)) {
+ goto exit_err;
+ }
+
+ chr = qemu_chr_new_from_opts(opts, NULL);
+ if (chr == NULL) {
+ qemu_opts_del(opts);
+ error_setg(&err, "Creating chardev failed\n");
+ goto exit_err;
+ }
+ return 0;
+
+exit_err:
+ qerror_report_err(err);
+ error_free(err);
+ return -1;
+}
+
+void qmp_chardev_del(const char *id, Error **errp)
+{
+ CharDriverState *chr;
+
+ chr = qemu_chr_find(id);
+ if (NULL == chr) {
+ error_setg(errp, "Chardev '%s' not found\n", id);
+ return;
+ }
+ if (chr->chr_can_read || chr->chr_read ||
+ chr->chr_event || chr->handler_opaque) {
+ error_setg(errp, "Chardev '%s' is busy\n", id);
+ return;
+ }
+ qemu_chr_delete(chr);
+}
diff --git a/qemu-char.h b/qemu-char.h
index 486644b..a910a60 100644
--- a/qemu-char.h
+++ b/qemu-char.h
@@ -74,6 +74,7 @@ struct CharDriverState {
char *filename;
int opened;
int avail_connections;
+ QemuOpts *opts;
QTAILQ_ENTRY(CharDriverState) next;
};
@@ -236,6 +237,7 @@ void qemu_chr_info(Monitor *mon, QObject **ret_data);
CharDriverState *qemu_chr_find(const char *name);
QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename);
+int qmp_chardev_add(Monitor *mon, const QDict *qdict, QObject **ret);
/* add an eventfd to the qemu devices that are polled */
CharDriverState *qemu_chr_open_eventfd(int eventfd);
diff --git a/qmp-commands.hx b/qmp-commands.hx
index 2f8477e..ebc1cee 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -2576,3 +2576,64 @@ EQMP
.args_type = "",
.mhandler.cmd_new = qmp_marshal_input_query_target,
},
+
+ {
+ .name = "chardev_add",
+ .args_type = "",
+ .mhandler.cmd_new = qmp_chardev_add,
+ },
+
+SQMP
+chardev_add
+-----------
+
+Add a chardev.
+
+Arguments:
+
+- "id": the chardev's ID, must be unique (json-string)
+- "backend": the chardev backend: "file", "socket", ... (json-string)
+- "path": file / device / unix socket path (json-string, optional)
+- "name": spice channel name (json-string, optional)
+- "host": host name (json-string, optional)
+- "port": port number (json-string, optional)
+- "server": create socket in server mode (json-bool, optional)
+- "wait": wait for connect (json-bool, optional)
+- "ipv4": force ipv4-only (json-bool, optional)
+- "ipv6": force ipv6-only (json-bool, optional)
+- "telnet": telnet negotiation (json-bool, optional)
+
+Example:
+
+-> { "execute": "chardev_add", "arguments": { "id" : "foo",
+ "backend" : "socket",
+ "path" : "/tmp/foo",
+ "server" : "on",
+ "wait" : "off" } }
+<- { "return": {} }
+
+EQMP
+
+ {
+ .name = "chardev_del",
+ .args_type = "",
+ .mhandler.cmd_new = qmp_marshal_input_chardev_del,
+ },
+
+
+SQMP
+chardev_del
+-----------
+
+Remove a chardev.
+
+Arguments:
+
+- "id": the chardev's ID, must exist and not be in use (json-string)
+
+Example:
+
+-> { "execute": "chardev_del", "arguments": { "id" : "foo" } }
+<- { "return": {} }
+
+EQMP
--
1.7.1
